CN119510815A - A calibration device for wind speed measuring instrument - Google Patents
A calibration device for wind speed measuring instrument Download PDFInfo
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- CN119510815A CN119510815A CN202510041270.5A CN202510041270A CN119510815A CN 119510815 A CN119510815 A CN 119510815A CN 202510041270 A CN202510041270 A CN 202510041270A CN 119510815 A CN119510815 A CN 119510815A
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- 230000007246 mechanism Effects 0.000 claims abstract description 76
- 230000001360 synchronised effect Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 35
- 230000000712 assembly Effects 0.000 claims description 13
- 238000000429 assembly Methods 0.000 claims description 13
- 230000005571 horizontal transmission Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 238000012795 verification Methods 0.000 description 79
- 238000007789 sealing Methods 0.000 description 40
- 238000000034 method Methods 0.000 description 24
- 238000003556 assay Methods 0.000 description 18
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 17
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
- G01P21/025—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers for measuring speed of fluids; for measuring speed of bodies relative to fluids
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Abstract
本发明涉及一种用于风速测量仪的检定装置，属于风速测量仪检定技术领域；包括检定管，在检定管的两端开口处分别设置有进风管以及出风管，进风管与通风机相连接；在检定管的底板中心处设置有检定口，检定口外侧设置有检定箱，在检定口处通过滑移机构设置有标准仪固定板与测量仪固定板，通过滑移机构来实现标准仪固定板与测量仪固定板在前后滑移时的升降；在检定口处通过连杆机构设置有两块封闭板，通过连杆机构来实现两块封闭板开闭；在检定箱内部设置有驱动机构，驱动机构与滑移机构以及连杆机构相连接，通过驱动机构来实现连杆机构与滑移机构的同步动作；解决了目前风速测量仪检定时将标准仪与风速测量仪进行替换的效率低、准确性差的问题。
The invention relates to a calibration device for an anemometer, belonging to the technical field of anemometer calibration; the device comprises a calibration tube, at the openings at both ends of the calibration tube are respectively provided with an air inlet pipe and an air outlet pipe, the air inlet pipe is connected to a ventilator; a calibration port is provided at the center of the bottom plate of the calibration tube, a calibration box is provided outside the calibration port, a standard instrument fixing plate and a measuring instrument fixing plate are provided at the calibration port through a sliding mechanism, and the lifting and lowering of the standard instrument fixing plate and the measuring instrument fixing plate when sliding back and forth are realized through the sliding mechanism; two closing plates are provided at the calibration port through a connecting rod mechanism, and the opening and closing of the two closing plates are realized through the connecting rod mechanism; a driving mechanism is provided inside the calibration box, the driving mechanism is connected with the sliding mechanism and the connecting rod mechanism, and the synchronous action of the connecting rod mechanism and the sliding mechanism is realized through the driving mechanism; the problem of low efficiency and poor accuracy in replacing the standard instrument with the anemometer during the current anemometer calibration is solved.
Description
Technical Field
The invention belongs to the technical field of wind speed measuring instrument verification, and particularly relates to a verification device for a wind speed measuring instrument.
Background
After the wind speed measuring instrument is manufactured, because the wind speed measuring instrument can have a certain error value when measuring the wind speed, the wind speed measuring instrument needs to be verified in such a way that the wind speed measuring instrument and the standard instrument are placed in the same measuring environment, and the measured value difference of the wind speed measuring instrument and the standard instrument is compared. The wind speed measuring instrument can be calibrated only by comparing the wind speed measuring instrument for a plurality of times under different wind speed conditions. In order to ensure that the verification result of the wind speed measuring instrument is accurate, the wind speed measuring instrument and the standard instrument are required to be replaced for a plurality of times, and the wind speed measuring instrument and the standard instrument are always positioned at the same test position, so that the verification result is accurate. The existing mode is that the standard instrument and the wind speed measuring instrument are replaced manually, so that not only is the efficiency low, but also the dislocation of the test positions of the standard instrument and the wind speed measuring instrument is likely to be caused, and the accuracy of the verification result is affected.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides a calibrating device for a wind speed measuring instrument, and solves the problems of low efficiency and poor accuracy of replacing a standard instrument with the wind speed measuring instrument when the current wind speed measuring instrument is detected.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
A calibrating device for a wind speed measuring instrument comprises a calibrating tube, wherein an air inlet pipe and an air outlet pipe are respectively arranged at openings at two ends of the calibrating tube, the air inlet pipe is connected with a ventilator, a calibrating opening is arranged at the center of a bottom plate of the calibrating tube, a calibrating box is fixedly arranged at the outer side of the calibrating opening, a standard instrument fixing plate and a measuring instrument fixing plate are arranged at the calibrating opening through a sliding mechanism, lifting of the standard instrument fixing plate and the measuring instrument fixing plate during front-back sliding is achieved through the sliding mechanism, two sealing plates are arranged at the calibrating opening through a connecting rod mechanism, opening and closing of the two sealing plates are achieved through the connecting rod mechanism, a driving mechanism is arranged inside the calibrating box and connected with the sliding mechanism and the connecting rod mechanism, and synchronous action of the connecting rod mechanism and the sliding mechanism is achieved through the driving mechanism.
Further, the verification port is a square through hole, the standard instrument fixing plate is positioned above the front side of the measurement instrument fixing plate, the standard instrument fixing plate is positioned at the inner side of the verification port, and the measurement instrument fixing plate is positioned in the verification box below the verification port.
The sliding mechanism comprises a standard instrument lifting rod, a standard instrument transverse rod, a measuring instrument lifting rod and a measuring instrument transverse rod, wherein a vertical standard instrument lifting rod is fixedly arranged at four corners of the lower end face of a standard instrument fixing plate respectively, a left-right horizontal standard instrument transverse rod is fixedly arranged between the lower ends of the four standard instrument lifting rods, a vertical measuring instrument lifting rod is fixedly arranged at four corners of the lower end face of the measuring instrument fixing plate respectively, and a left-right horizontal measuring instrument transverse rod is fixedly arranged between the lower ends of the four measuring instrument lifting rods.
The sliding mechanism further comprises a sliding frame and a guide groove frame, the lower end of the sliding frame is arranged at the inner bottom surface of the verification box in a sliding mode along the front-rear direction, four standard instrument lifting rods and four measuring instrument lifting rods are respectively inserted into the inner side of the upper end face of the sliding frame in a sliding mode, the guide groove frame is arranged in the sliding frame, a first guide groove which penetrates through the sliding frame left and right is arranged on the guide groove frame, the first guide groove comprises a front side horizontal section, a front side inclined section, a middle horizontal section, a rear side inclined section and a rear side horizontal section which are sequentially connected, the front side horizontal section is equal to the rear side horizontal section in height, the middle horizontal section is higher than the front side horizontal section and the rear side horizontal section in height, and a standard instrument cross rod and a measuring instrument cross rod are inserted into the first guide groove in a mode, wherein the standard instrument cross rod is located in the middle of the inner side of the middle horizontal section, and the measuring instrument cross rod is located at the inner rear end of the rear side horizontal section.
Furthermore, two sealing plates which are symmetrical from front to back are arranged in the verification port, the outer side faces of the two sealing plates are in contact with the inner wall of the verification port, an avoidance groove is respectively formed in the middle of the end face of one side, where the two sealing plates are in contact with each other, of the two sealing plates, and the standard instrument fixing plate is located in the avoidance groove of the two sealing plates.
The connecting rod mechanism comprises four groups of connecting rod assemblies, wherein a group of connecting rod assemblies are respectively arranged at the edges of the left side and the right side of the lower end face of the front sealing plate and the lower end face of the rear sealing plate;
The upper end of the first connecting rod is hinged with one end, close to the other sealing plate, of the lower end face of the sealing plate, the lower end of the first connecting rod is hinged with the inner wall of the verification box, the second connecting rod is of a bent rod-shaped structure and comprises a first rod section, a second rod section and a third rod section which are fixedly connected in sequence, a first hinge hole is formed in one end, far away from the second rod section, of the first rod section, a second hinge hole is formed in one end, far away from the second rod section, of the third rod section, a third hinge hole is formed in the joint of the second rod section and the third rod section, the first hinge hole is hinged with the middle of the lower end face of the sealing plate, the third hinge hole is hinged with the inner wall of the verification box, a connecting line between the first hinge hole and the third hinge hole is parallel to the first connecting rod and is equal in length, one end of the third connecting rod is hinged with the second hinge hole of the second connecting rod, one end of the swing rod is fixedly arranged on a rotating disc, and the other end, far away from the second connecting rod is hinged with one end of the third connecting rod.
Further, the swing rods of the front and rear groups of connecting rod assemblies on the left side and the right side are fixed on the same rotating disc, the left rotating disc and the right rotating disc are respectively arranged on the inner walls on the left side and the right side of the verification box in a rotating mode through rotating shafts, the lower ends of the two rotating discs are provided with the same left-right horizontal transmission rods, the transmission rods are rotatably arranged on the inner bottom surface of the verification box through hinging seats, and two ends of the transmission rods are respectively in transmission connection with the rotating shafts of the two rotating discs through a group of synchronous belt transmission mechanisms.
The driving mechanism comprises an electric push rod, a fixing rod, a transverse sliding frame and a longitudinal sliding plate, wherein the electric push rod is fixedly arranged at the inner bottom surface of the verification box, a piston rod of the electric push rod is horizontally forwards and is in a contracted state, a sliding groove is formed in the inner wall of the left side of the verification box, the transverse sliding frame is slidably arranged in the sliding groove along the front-rear direction, the transverse sliding frame is positioned at the inner rear end of the sliding groove, the longitudinal sliding plate is slidably arranged on the right side end surface of the transverse sliding frame along the vertical direction, an action groove is formed in the side wall of the left side of the sliding frame, an L-shaped fixing rod is fixedly arranged at the end part of the piston rod of the electric push rod, the horizontal section of the fixing rod penetrates through the action groove of the sliding frame, and the upper end of the vertical section of the fixing rod is fixedly connected with the lower end of the transverse sliding frame.
The driving mechanism further comprises a second guide groove, the second guide groove is located on the inner wall of the sliding groove, the second guide groove comprises an upper horizontal section, a middle inclined section and a lower horizontal section which are connected in sequence, the upper horizontal section is located on the upper rear side of the lower horizontal section, a deflector rod is fixedly arranged on the inner side face of the longitudinal sliding plate, the deflector rod penetrates through the transverse sliding frame to be inserted into the second guide groove, one end of the deflector rod, far away from the longitudinal sliding plate, is located at the inner rear end of the upper horizontal section of the second guide groove, an upper acting rod and a lower acting rod are fixedly arranged at the edges of the upper side and the lower side of the outer side end face of the longitudinal sliding plate respectively, an upper rack is fixedly arranged at the rear end of the lower end face of the upper acting rod, a lower rack is fixedly arranged at the front end of the upper end face of the lower acting rod, a gear is fixedly arranged at the left end of the transmission rod, the gear is located between the upper acting rod and the lower acting rod, the front end of the lower acting rod and the gear are in a preliminary meshed state, and the upper rack is located at the rear side of the gear.
Furthermore, two sliding blocks are arranged in the action groove in a sliding manner along the front-rear direction, a front-rear horizontal guide rod is fixedly arranged at the center of the end face of one side, which is far away from each other, of the two sliding blocks, a guide hole is respectively arranged on the inner walls of the front side and the rear side of the action groove, the two guide rods are respectively inserted in the guide holes of the same side in a sliding manner, a spring is respectively sleeved on the outer sides of the two guide rods, two ends of the spring are respectively fixedly connected with the sliding blocks of the same side and the inner wall of the action groove, and the horizontal section of the fixing rod is positioned between the two sliding blocks. At this time, the horizontal section of the fixed rod is contacted with the front end surface of the sliding block at the rear side, the spring at the rear side is in a compressed state, and the spring at the front side is in a free extension state.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the calibrating device for the wind speed measuring instrument, front and back transposition of the standard instrument fixing plate and the measuring instrument fixing plate is achieved through the expansion and contraction of the electric push rod, the standard instrument can be guaranteed to completely enter the calibrating box when the wind speed is measured through the sliding mechanism, the standard instrument completely enters the calibrating box when the wind speed is measured through the wind speed measuring instrument, the standard instrument is guaranteed to be located at the same testing position, and the standard instrument and the measuring instrument are guaranteed not to be interfered with each other.
(2) According to the calibrating device for the wind speed measuring instrument, provided by the invention, by arranging the two sealing plates and the connecting rod mechanism, the calibration port of the standard instrument or the wind speed measuring instrument is always in a sealing state when the wind speed is detected, the phenomenon of air leakage from the calibration port is avoided, and the accuracy of the calibration result is further ensured.
(3) According to the calibrating device for the wind speed measuring instrument, the sliding mechanism and the connecting rod mechanism can act through one electric push rod through the arrangement of the driving mechanism, and the action time of the two sealing plates is completely staggered with the action time of the measuring instrument fixing plate and the action time of the standard instrument fixing plate, so that the two sealing plates are prevented from interfering with each other.
Drawings
The invention is described in further detail below with reference to the accompanying drawings:
FIG. 1 is a schematic perspective view of the overall invention;
FIG. 2 is a side view of the present invention in a fully retracted state of the piston rod of the electric putter;
FIG. 3 is an enlarged partial schematic view at A in FIG. 2;
FIG. 4 is a side view of the present invention with the piston rod of the electric putter extending outwardly to the front end of the upper rack gear in a preliminary engagement with the gear wheel;
FIG. 5 is an enlarged partial schematic view at B in FIG. 4;
FIG. 6 is a schematic view of the internal structure of the assay housing after half-section with the piston rod of the electric putter in a fully retracted state;
FIG. 7 is a schematic diagram of the internal structure of the verification box after half-section when the piston rod of the electric push rod extends outwards to the front end of the upper rack and the gear are in a primary engagement state;
FIG. 8 is a side view of the internal structure of the assay housing in half-section with the piston rod of the electric putter in a fully retracted state;
FIG. 9 is a side view of the internal structure of the assay case after half-section with the piston rod of the electric putter extending outwardly to the front end of the upper rack in a preliminary engagement with the gear;
FIG. 10 is a schematic illustration of the linkage within the assay housing after half-section with the piston rod of the electric push rod in a fully retracted state;
FIG. 11 is a schematic view of the linkage mechanism inside the assay box after half-section when the piston rod of the electric push rod extends out to the front end of the upper rack and the gear are in a primary engagement state;
FIG. 12 is a schematic view of the sliding mechanism inside the assay housing after half-section with the piston rod of the electric push rod in the fully retracted state;
FIG. 13 is a schematic view of the sliding mechanism inside the assay case after half-section when the piston rod of the electric push rod is in a fully extended state;
FIG. 14 is a schematic view of the slider of FIG. 12 shown in semi-section;
FIG. 15 is a schematic view of the slider of FIG. 13 shown in semi-section;
FIG. 16 is a schematic illustration of the relative relationship of the piston rod of the electric putter to the glide carrier in the fully retracted state;
FIG. 17 is an enlarged partial schematic view at C in FIG. 16;
FIG. 18 is a schematic view of the relative relationship of the piston rod of the electric putter to the carriage in the fully extended state;
FIG. 19 is a partially enlarged schematic view of FIG. 18 at D;
FIG. 20 is a schematic view of the relative relationship of the lower rack and pinion of the piston rod of the electric putter in the fully retracted state;
FIG. 21 is a schematic view of the relative relationship of the upper rack and pinion with the piston rod of the electric putter in a fully extended state;
FIG. 22 is a schematic illustration of the relative relationship between the lower rack and the pinion, lateral glide block, longitudinal glide plate of the piston rod of the electric putter in the fully retracted state;
FIG. 23 is a schematic view of the relative relationship between the upper rack and the pinion, lateral glide block, longitudinal glide plate of the piston rod of the electric putter in the fully extended state;
FIG. 24 is a schematic view of the relative relationship between the electric putter and the lateral glide frame and longitudinal glide plate when the piston rod of the electric putter is in a fully retracted state;
FIG. 25 is a schematic view of the relative relationship between the electric putter and the lateral glide frame and longitudinal glide plate when the piston rod of the electric putter is in a fully extended state;
FIG. 26 is a schematic view of the structure of the channel frame;
The device comprises a verification tube 1, a verification tube 2, a verification box 3, a verification opening 4, a verification box 5, a standard instrument fixing plate 6, a measuring instrument fixing plate 7, a sealing plate 8, an operation door 9, an observation window 10, an access door 11, a standard instrument lifting rod 12, a standard instrument cross rod 13, a measuring instrument lifting rod 14, a measuring instrument cross rod 15, a sliding frame 16, a guide sleeve 17, a guide groove frame 18, a first guide groove 19, a front horizontal section 20, a front inclined section 21, a middle horizontal section 22, a rear inclined section 23, a rear horizontal section 24, a first connecting rod 25, a second connecting rod 26, a third connecting rod 27, a swinging rod 28, a rotating disc 29, a transmission rod 30, a synchronous belt transmission mechanism 31, an avoidance trough 32, an electric push rod 33, a sliding trough 34, a transverse sliding frame 35, a longitudinal sliding plate 36, a second guide groove 37, an upper horizontal section 38, a middle inclined section 40, a lower horizontal section 41, a gear rack 45, a gear 46, a rack 47 and a rack gear 47.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The following describes the technical scheme of the present invention in detail with reference to examples and drawings, but the scope of protection is not limited thereto.
As shown in fig. 1-26, the invention provides a verification device for a wind speed measuring instrument, which comprises a verification tube 1, wherein an air inlet tube 2 and an air outlet tube 3 are respectively arranged at openings at two ends of the verification tube 1, the air inlet tube 2 is connected with a ventilator, a verification opening 4 is arranged at the center of a bottom plate of the verification tube 1, a verification box 5 is fixedly arranged at the outer side of the verification opening 4, a standard instrument fixing plate 6 and a measuring instrument fixing plate 7 are arranged at the verification opening 4 through a sliding mechanism, lifting of the standard instrument fixing plate 6 and the measuring instrument fixing plate 7 during front-back sliding is realized through the sliding mechanism, two sealing plates 8 are arranged at the verification opening 4 through a connecting rod mechanism, opening and closing of the two sealing plates 8 are realized through the connecting rod mechanism, a driving mechanism is arranged inside the verification box 5, the driving mechanism is connected with the sliding mechanism and the connecting rod mechanism, and synchronous action of the connecting rod mechanism and the sliding mechanism is realized through the driving mechanism.
The verification tube 1 is of a square tubular structure which is horizontally arranged, the verification tube 1 is horizontally arranged along the front-back direction, and two ends of the verification tube 1 are kept open. An openable operation door 9 is provided at the center of the top plate of the assay tube 1, and the inside of the assay tube 1 is operated by opening the operation door 9. Transparent observation windows 10 are respectively arranged on the side walls of the left side and the right side of the verification tube 1, and the components inside the verification tube 1 can be observed through the observation windows 10.
The verification port 4 is a square through hole. The verification box 5 is of a square box body structure with an open upper end, the open upper end of the verification box 5 is fixedly connected with the lower end face of the verification tube 1, and the verification port 4 is positioned on the inner side of the open upper end of the verification box 5. An openable access door 11 is provided on the right side wall of the verification box 5, and components inside the verification box 5 can be overhauled by opening the access door 11.
The standard instrument fixing plate 6 and the measuring instrument fixing plate 7 are square plate structures which are horizontally arranged, wherein the standard instrument fixing plate 6 is located above the front side of the measuring instrument fixing plate 7, the standard instrument fixing plate 6 is located inside the detecting opening 4, and the measuring instrument fixing plate 7 is located inside the detecting box 5 below the detecting opening 4.
The sliding mechanism comprises a standard instrument lifting rod 12, a standard instrument cross rod 13, a measuring instrument lifting rod 14, a measuring instrument cross rod 15, a sliding frame 16 and a guide groove frame 18.
The standard instrument lifting rod is characterized in that four vertical standard instrument lifting rods 12 are fixedly arranged at four corners of the lower end face of the standard instrument fixing plate 6 respectively, a standard instrument connecting rod is fixedly arranged between the lower ends of the two standard instrument lifting rods 12 on the left side, a standard instrument connecting rod is fixedly arranged between the lower ends of the two standard instrument lifting rods 12 on the right side, a standard instrument cross rod 13 is fixedly arranged between the middle parts of the two standard instrument connecting rods, and the standard instrument cross rod 13 is horizontally arranged along the left-right direction.
The four corners of the lower end face of the measuring instrument fixing plate 7 are respectively and fixedly provided with a vertical measuring instrument lifting rod 14, a measuring instrument connecting rod is fixedly arranged between the lower ends of the two measuring instrument lifting rods 14 on the left side, a measuring instrument connecting rod is fixedly arranged between the lower ends of the two measuring instrument lifting rods 14 on the right side, a measuring instrument cross rod 15 is fixedly arranged between the middle parts of the two measuring instrument connecting rods, and the measuring instrument cross rod 15 is horizontally arranged along the left-right direction.
The sliding frame 16 is a U-shaped plate structure with a downward opening, and the sliding frame 16 extends horizontally along the front-rear direction. The upper end face of the sliding frame 16 is respectively provided with a front lifting hole and a rear lifting hole, each lifting hole comprises four lifting holes in square arrays, and a guide sleeve 17 is fixedly inserted into each lifting hole. The four standard instrument lifting rods 12 are respectively and slidably inserted into the guide sleeves 17 of the four lifting holes on the front side, and the four measuring instrument lifting rods 14 are respectively and slidably inserted into the guide sleeves 17 of the four lifting holes on the rear side. The two first sliding blocks extending horizontally from front to back are respectively fixedly arranged at two ends of the lower side of the sliding frame 16, two first sliding grooves which are bilaterally symmetrical are arranged at the inner bottom surface of the verification box 5, the first sliding grooves extend horizontally along the front-back direction, and the two first sliding blocks are respectively inserted into the two first sliding grooves in a sliding manner, so that the sliding frame 16 horizontally slides along the front-back direction in the verification box 5.
Inside the slide frame 16, a guide groove frame 18 is provided, the guide groove frame 18 is fixedly provided at the inner bottom surface of the assay case 5, and the guide groove frame 18 is located in a vertical plane in the front-rear direction. The first guide groove 19 penetrating left and right is arranged on the guide groove frame 18, the first guide groove 19 comprises a front side horizontal section 20, a front side inclined section 21, a middle horizontal section 22, a rear side inclined section 23 and a rear side horizontal section 24, the front side horizontal section 20, the middle horizontal section 22 and the rear side horizontal section 24 are horizontally arranged along the front-rear direction, the front side horizontal section 20 and the rear side horizontal section 24 are equal in height, the middle horizontal section 22 is higher than the front side horizontal section 20 and the rear side horizontal section 24 in height, the front end and the rear end of the front side inclined section 21 are respectively connected with the rear end of the front side horizontal section 20 and the front end of the middle horizontal section 22, the front end and the rear end of the rear side inclined section 23 are respectively connected with the rear end of the middle horizontal section 22 and the front end of the rear side horizontal section 24, and all the joints are in smooth transition connection.
Both the etalon cross bar 13 and the measuring cross bar 15 are inserted into the first guide groove 19, wherein the etalon cross bar 13 is positioned at the inner middle part of the middle horizontal section 22, and the measuring cross bar 15 is positioned at the inner rear end of the rear horizontal section 24. The outer side surfaces of the standard transverse rod 13 and the measuring instrument transverse rod 15 are in sliding contact with the inner walls of the upper side and the lower side of the first guide groove 19.
When the sliding frame 16 slides forward under the drive of the driving mechanism, the sliding frame 16 drives the standard meter fixing plate 6 and the measuring meter fixing plate 7 to slide forward through the standard meter lifting rod 12 and the measuring meter lifting rod 14 respectively. During the forward sliding of the etalon fixing plate 6 and the measuring instrument fixing plate 7, the etalon rail 13 and the measuring instrument rail 15 also slide forward. The standard rail 13 slides out of the middle horizontal section 22 of the first guide groove 19 and through the front inclined section 21 to the forefront end of the front horizontal section 20, and the measuring rail 15 slides out of the rear horizontal section 24 of the first guide groove 19 and through the rear inclined section 23 to the inner middle of the middle horizontal section 22. The standard gauge cross bar 13 is continuously lowered in the forward sliding process, so that the standard gauge fixing plate 6 is also lowered, and the standard gauge cross bar 15 is continuously raised in the forward sliding process, so that the standard gauge fixing plate 7 is also raised. Finally, the standard meter fixing plate 6 continuously descends into the calibration box 5 in the forward sliding process, the measuring meter fixing plate 7 continuously ascends into the calibration port 4 in the forward sliding process, and at the moment, the measuring meter fixing plate 7 moves to the initial position of the standard meter fixing plate 6.
When the sliding frame 16 slides back again under the drive of the driving mechanism, the sliding frame 16 drives the standard fixing plate 6 and the measuring instrument fixing plate 7 to slide back through the standard lifting rod 12 and the measuring instrument lifting rod 14 respectively, and the standard cross rod 13 and the measuring instrument cross rod 15 slide in the first guide groove 19 along opposite paths, so that the standard fixing plate 6 continuously rises until returning to the inside of the verification port 4 in the process of sliding back, and the measuring instrument fixing plate 7 continuously descends until returning to the inside of the verification box 5 in the process of sliding back, and at the moment, the standard fixing plate 6 and the measuring instrument fixing plate 7 return to the initial positions again.
The two front-back symmetrical sealing plates 8 are arranged inside the verification port 4, the two sealing plates 8 are of square plate structures which are horizontally arranged, the two sealing plates 8 are in contact with each other, and the outer side surfaces of the two sealing plates 8 are in contact with the inner wall of the verification port 4. The middle part of the end face of one side, which is contacted with each other, of the two sealing plates 8 is respectively provided with an avoidance groove, the standard instrument fixing plate 6 is positioned inside the avoidance groove of the two sealing plates 8, and the outer side face of the standard instrument fixing plate 6 is contacted with the inner walls of the avoidance grooves of the two sealing plates 8.
The connecting rod mechanism comprises four groups of connecting rod assemblies, wherein the left and right side edges of the lower end face of the front sealing plate 8 are provided with left and right groups of symmetrical connecting rod assemblies, and the left and right side edges of the lower end face of the rear sealing plate 8 are provided with left and right groups of symmetrical connecting rod assemblies. Two sets of link assemblies, which are symmetrical left and right, are located on the left and right sides of the slider 16.
The connecting rod assembly comprises a swing rod 28, a first connecting rod 25, a second connecting rod 26 and a third connecting rod 27.
The first connecting rod 25 is in a linear rod-shaped structure, the upper end of the first connecting rod 25 is hinged with one end, close to the other sealing plate 8, of the lower end face of the sealing plate 8, and the lower end of the first connecting rod 25 is hinged with the inner wall of the verification box 5.
The second connecting rod 26 is of a bent rod-shaped structure and comprises a first rod section, a second rod section and a third rod section which are fixedly connected in sequence, wherein a first hinge hole is formed in one end, far away from the second rod section, of the first rod section, a second hinge hole is formed in one end, far away from the second rod section, of the third rod section, a third hinge hole is formed in the joint of the second rod section and the third rod section, the first hinge hole is hinged to the middle of the lower end face of the sealing plate 8, the third hinge hole is hinged to the inner wall of the verification box 5, and a connecting line between the first hinge hole and the third hinge hole is parallel to the first connecting rod 25 and is equal in length.
The third connecting rod 27 has a linear rod-shaped structure, and one end of the third connecting rod 27 is hinged with the second hinge hole of the second connecting rod 26.
The swing rod 28 is in a linear rod-shaped structure, one end of the swing rod 28 is fixedly arranged on the rotating disc 29, and the other end of the swing rod 28 is hinged with one end, far away from the second connecting rod 26, of the third connecting rod 27.
The swing rods 28 of the front and rear groups of connecting rod assemblies on the left side are fixed on the same rotating disc 29, the swing rods 28 of the front and rear groups of connecting rod assemblies on the right side are fixed on the same rotating disc 29, the left and right rotating discs 29 are respectively arranged on the inner walls of the left and right sides of the verification box 5 in a rotating mode through rotating shafts, and the two rotating discs 29 are located in a vertical plane between the front and rear sealing plates 8.
The same transmission rod 30 is arranged at the lower ends of the two rotating discs 29, the transmission rod 30 is horizontally arranged along the left-right direction, and the transmission rod 30 is rotatably arranged on the inner bottom surface of the verification box 5 through a hinge seat. Two ends of the transmission rod 30 are respectively in transmission connection with the rotating shafts of the two rotating discs 29 through a group of synchronous belt transmission mechanisms 31, driven pulleys are respectively fixedly sleeved on the rotating shafts of the two rotating discs 29, driving pulleys are respectively fixedly arranged at two ends of the transmission rod 30, the driving pulleys are positioned below the driven pulleys at the same side, and synchronous belts are arranged between the driving pulleys and the driven pulleys at the same side. The driving belt wheels on two sides are driven by the driving rod 30 to synchronously rotate, and the driving belt wheels drive the driven belt wheels on the upper side to rotate through the synchronous belt, and the driven belt wheels drive the rotating discs 29 on the same side to rotate.
When the two rotating discs 29 rotate synchronously, the rotating discs 29 drive the two outer swing rods 28 to rotate synchronously, the swing rods 28 drive the second connecting rods 26 to rotate through the third connecting rods 27, and the second connecting rods 26 drive the sealing plate 8 to rotate. The two closing plates 8 are rotated toward the upper side and away from each other until the two closing plates 8 are moved to both sides of the upper end of the assay port 4, and the assay port 4 is exposed. Since the line between the first and third hinge holes is parallel to the first link 25 and of equal length, it is ensured that the closing plate 8 remains horizontal at all times during movement.
When the two rotating disks 29 are rotated in the opposite directions in synchronization, the above-described steps are reversed, so that the two closing plates 8 are returned to the inside of the assay port 4 again, and the two closing plates 8 are brought into contact with the standard fixing plate 6, so that the assay port 4 is closed.
The left side wall and the right side wall of the sliding frame 16 are respectively provided with a horizontal avoidance passing groove 32, the transmission rod 30 is inserted into the two avoidance passing grooves 32 in a sliding manner, when the sliding frame 16 slides back and forth, the transmission rod 30 slides relatively in the avoidance passing grooves 32, and the front and back sliding of the sliding frame 16 is ensured not to interfere with the transmission rod 30.
The driving mechanism comprises an electric push rod 33, a fixed rod 43, a transverse sliding frame 35, a longitudinal sliding plate 36, a gear 48, a second guide groove 37, a sliding block 49 and a spring 51.
An electric push rod 33 is fixedly arranged at the inner bottom surface of the verification box 5, the electric push rod 33 is positioned in the sliding frame 16, a piston rod of the electric push rod 33 horizontally forwards, and the piston rod of the electric push rod 33 is in a contracted state.
A sliding groove 34 is arranged on the left inner wall of the verification box 5, and the sliding groove 34 is of a square groove structure which is horizontally arranged. The sliding groove 34 is internally provided with a transverse sliding frame 35 in a sliding manner, the transverse sliding frame 35 is of a square frame structure, the transverse sliding frame 35 is positioned in a vertical plane in the front-rear direction, and the transverse sliding frame 35 is positioned at the inner rear end of the sliding groove 34. The sliding groove 34 is provided with a second sliding groove extending horizontally from front to back at the inner parts of the upper and lower side end surfaces, the upper and lower side end surfaces of the transverse sliding frame 35 are respectively fixedly provided with a second sliding block, and the two second sliding blocks are respectively inserted into the two second sliding grooves in a sliding manner, so that the transverse sliding frame 35 horizontally slides from front to back in the sliding groove 34.
A vertical third sliding groove is respectively arranged at the front side edge and the rear side edge of the right side end face of the transverse sliding frame 35. A longitudinal sliding plate 36 is respectively arranged between the two third sliding grooves, a third sliding block is respectively arranged at the front end and the rear end of the longitudinal sliding plate 36, and the two third sliding blocks are respectively connected inside the two third sliding grooves in a sliding manner, so that the longitudinal sliding plate 36 vertically slides on the transverse sliding frame 35.
The second guide groove 37 is disposed on the inner wall of the sliding groove 34, the second guide groove 37 includes an upper horizontal section 38, a middle inclined section 39, and a lower horizontal section 40, the upper horizontal section 38 and the lower horizontal section 40 are horizontally disposed along the front-rear direction, the upper horizontal section 38 is disposed at the rear upper side of the lower horizontal section 40, and the front-rear ends of the middle inclined section 39 are respectively connected with the rear end of the lower horizontal section 40 and the front end of the upper horizontal section 38. A deflector rod 41 is fixedly arranged on the inner side surface of the longitudinal sliding plate 36, the deflector rod 41 penetrates through the transverse sliding frame 35 to be inserted into the second guide groove 37, and one end of the deflector rod 41, which is far away from the longitudinal sliding plate 36, is positioned at the inner rear end of the upper horizontal section 38 of the second guide groove 37.
A single action groove 42 penetrating from left to right is provided in the left side wall of the slide frame 16, and the action groove 42 is horizontally provided along the front-rear direction. The fixed pole 43 that is provided with an L type at the piston rod tip of electric putter 33, fixed pole 43 include a vertical section and a horizontal section, and the horizontal section sets up along controlling the direction level to the horizontal section passes the effect groove 42 of sliding frame 16, and the one end of horizontal section is fixed connection with the piston rod tip of electric putter 33, and the other end of horizontal section is fixed connection with the lower extreme of vertical section, and the upper end of vertical section is fixed connection with the lower extreme of horizontal sliding frame 35. The piston rod of the electric push rod 33 stretches to realize the forward and backward sliding of the transverse sliding frame 35 in the sliding groove 34.
An upper operating lever 44 and a lower operating lever 46 are fixedly provided at the upper and lower side edges of the outer end surface of the longitudinal slide plate 36, respectively, and the upper operating lever 44 and the lower operating lever 46 are horizontally provided in the front-rear direction. An upper rack 45 is fixedly provided at the rear end of the lower end surface of the upper operating lever 44, and a lower rack 47 is fixedly provided at the front end of the upper end surface of the lower operating lever 46. A gear 48 is fixedly provided at the left end of the transmission rod 30, the gear 48 is located between the upper side operation rod 44 and the lower side operation rod 46, and the front end of the lower side rack 47 is in a preliminary engagement state with the gear 48, and the upper side rack 45 is located above the rear side of the gear 48.
The upper and lower side end surfaces of the inside of the action groove 42 are respectively provided with a front and rear horizontal third sliding groove, the inside of the action groove 42 is slidably provided with two sliding blocks 49, the upper and lower side end surfaces of each sliding block 49 are respectively fixedly provided with a third sliding block, and the upper and lower sliding blocks are respectively slidably inserted into the two third sliding grooves, so that the two sliding blocks 49 slide front and rear in the inside of the action groove 42. A front-rear horizontal guide rod 50 is fixedly arranged at the center of the end face of one side, away from each other, of the two sliding blocks 49, a front-rear horizontal guide hole is respectively arranged on the inner walls of the front side and the rear side of the action groove 42, and the two guide rods 50 are respectively inserted into the guide holes on the same side in a sliding manner. A spring 51 is respectively sleeved on the outer sides of the two guide rods 50, and two ends of the spring 51 are respectively fixedly connected with the sliding blocks 49 on the same side and the inner wall of the action groove 42.
The horizontal section of the fixed bar 43 is located between two sliding blocks 49. At this time, the horizontal section of the fixing lever 43 contacts the front end surface of the rear slider 49, the rear spring 51 is in a compressed state, and the front spring 51 is in a free extended state.
The working principle of the invention is that,
The first stage:
In the initial state, the piston rod of the electric push rod 33 is in a contracted state, the standard meter fixing plate 6 is positioned at the middle part of the inner side of the verification opening 4, the two sealing plates 8 are positioned in the verification opening 4 and seal the verification opening 4, the measuring meter fixing plate 7 is positioned in the verification box 5, the standard meter cross rod 13 is positioned at the middle part of the middle horizontal section 22 of the first guide groove 19, the measuring meter cross rod 15 is positioned at the rear end of the rear horizontal section 24 of the first guide groove 19, the front end of the lower rack 47 is in a preliminary meshing state with the gear 48, the horizontal section of the fixing rod 43 is in contact with the front end surface of the sliding block 49 of the rear side, the spring 51 of the rear side is in a compressed state, and the spring 51 of the front side is in a free extension state.
At this time, a standard meter is fixed to the upper end surface of the standard meter fixing plate 6, the measuring position of the standard meter is located at the axis of the verification tube 1, and the ventilator inputs the wind flow from the wind inlet tube 2 into the verification tube 1, and finally outputs the wind flow from the wind outlet tube 3. After the wind flow in the verification tube 1 passes through the standard instrument, the standard instrument measures the wind speed of the wind flow, so that the standard value of the wind speed is obtained.
And a second stage:
When the wind speed measuring instrument is required to measure the wind speed in the verification tube 1, the ventilator is controlled to stop running.
Then, the piston rod of the electric push rod 33 is controlled to extend outwards, in the process of extending the piston rod of the electric push rod 33, the piston rod of the electric push rod 33 drives the transverse sliding frame 35 to slide forwards in the sliding groove 34 through the fixing rod 43, the transverse sliding frame 35 drives the longitudinal sliding plate 36 to slide forwards, at the moment, the deflector rod 41 on the longitudinal sliding plate 36 slides forwards in the upper horizontal section 38 of the second guide groove 37, so that the height of the longitudinal sliding plate 36 is kept unchanged in the forward sliding process, and the heights of the upper rack 45 and the lower rack 47 are kept unchanged in the forward sliding process. When the lower rack 47 starts to slide forward, the lower rack 47 starts to drive the gear 48 to rotate, the gear 48 drives the transmission rod 30 to rotate, and the transmission rod 30 drives the rotating discs 29 on two sides to rotate through the synchronous belt transmission mechanisms 31 on two ends. When the two rotating discs 29 rotate synchronously, the rotating discs 29 drive the two outer swing rods 28 to rotate synchronously, the swing rods 28 drive the second connecting rods 26 to rotate through the third connecting rods 27, and the second connecting rods 26 drive the sealing plate 8 to rotate. The two closing plates 8 are rotated toward the upper side and away from each other until the two closing plates 8 are moved to both sides of the upper end of the assay port 4, and the assay port 4 is exposed, at which time the junction of the first and second rod sections of the second link 26 of the front link assembly is in contact with the front side edge of the assay port 4, and the junction of the first and second rod sections of the second link 26 of the rear link assembly is in contact with the rear side edge of the assay port 4, thereby ensuring that the two closing plates 8 and the link mechanism maintain the current state.
When the closing plates 8 are fully opened outwards into place, the lower rack 47 has passed the gear 48, the gear 48 is no longer rotating, neither the transmission rod 30 nor the rotating disc 29 nor the like is acting, and both closing plates 8 remain in the current position and angle. At this time, the horizontal section of the fixing lever 43 is kept in contact with both of the slide blocks 49, both of the front and rear springs 51 are in a freely elongated state, and at this time, the shift lever 41 on the longitudinal slide plate 36 enters the inside of the middle inclined section 39 from the upper horizontal section 38 of the second guide groove 37.
And a third stage:
As the piston rod of the electric push rod 33 continues to extend, the horizontal section of the fixing rod 43 starts to push the front side sliding block 49, the front side sliding block 49 slightly compresses the front side spring 51, the front side spring 51 pushes the sliding frame 16 to slide forward as a whole, so that the standard fixing plate 6 and the measuring instrument fixing plate 7 slide forward, and the standard fixing plate 6 gradually descends and the measuring instrument fixing plate 7 gradually ascends.
In this process, the piston rod of the electric push rod 33 continues to push the transverse sliding frame 35 to slide forward through the fixing rod 43, the transverse sliding frame 35 continues to drive the longitudinal sliding plate 36 to slide forward, the shift lever 41 on the longitudinal sliding plate 36 slides forward inside the middle inclined section 39 of the second guide groove 37, so that the height of the shift lever 41 gradually drops, the shift lever 41 drives the longitudinal sliding plate 36 to gradually drop inside the transverse sliding frame 35, and the upper rack 45 and the lower rack 47 gradually drop in the forward sliding process.
When the etalon fixing plate 6 slides forward to completely enter the inside of the verification box 5, the etalon fixing plate 6 descends to the lowest height, and at this time, the etalon cross bar 13 is located at the forefront end of the front horizontal section 20 of the first guide groove 19, the etalon cross bar 13 cannot slide forward continuously, and therefore the sliding frame 16 cannot slide forward continuously. At this time, the gauge fixing plate 7 slides forward to enter the calibration port 4, the gauge cross bar 15 is located at the middle part of the inner side of the middle horizontal section 22 of the first guide groove 19, the gauge fixing plate 7 is fixed with a wind speed gauge, and the measuring position of the wind speed gauge is located at the axis of the calibration tube 1.
When the etalon fixing plate 6 and the measuring instrument fixing plate 7 are slid forward in place, the shift lever 41 on the longitudinal slide plate 36 is slid to the front end of the middle inclined section 39 of the second guide groove 37, and the upper side rack 45 and the lower side rack 47 are slid forward to the lowest level, at which time the upper side rack 45 is located at the upper rear side of the gear 48 and the front end of the upper side rack 45 is in primary engagement with the gear 48.
Fourth stage:
As the piston rod of the electric push rod 33 continues to extend, the sliding frame 16 does not continue to move forward, and the fixing rod 43 continues to slide forward under the driving of the electric push rod 33, so that the horizontal section of the fixing rod 43 continues to compress the spring 51 at the front side. Simultaneously, the fixing rod 43 drives the transverse sliding frame 35 to slide forwards in the sliding groove 34, the transverse sliding frame 35 continues to drive the longitudinal sliding plate 36 to slide forwards, the deflector rod 41 on the longitudinal sliding plate 36 slides forwards in the lower horizontal section 40 of the second guide groove 37, so that the height of the longitudinal sliding plate 36 is kept unchanged in the forward sliding process, the heights of the upper side rack 45 and the lower side rack 47 are kept unchanged in the forward sliding process, the upper side rack 45 drives the gear 48 to rotate reversely in the forward sliding process, the gear 48 drives the transmission rod 30 to rotate reversely, the transmission rod 30 drives the two rotating discs 29 to rotate reversely through the synchronous belt transmission mechanisms 31 at two ends, and the rotating disc 29 drives the third connecting rod 27, the second connecting rod 26 and the first connecting rod 25 to act reversely, so that the two sealing plates 8 rotate again to the inside of the verification opening 4 until the two sealing plates 8 completely seal the verification opening 4.
At this time, the piston rod of the electric putter 33 is fully extended, the upper rack 45 is fully passed through the gear 48, and the front spring 51 is fully compressed.
And then the ventilator is controlled to be started again, so that the working parameters of the ventilator are kept the same as the previous working parameters. The ventilator inputs the wind flow from the wind inlet pipe 2 into the verification pipe 1, and finally outputs the wind flow outwards from the wind outlet pipe 3. After the wind flow in the verification tube 1 passes through the wind speed measuring instrument, the wind speed measuring instrument measures the wind speed of the wind flow, so that a measured value of the wind speed measuring instrument aiming at the wind speed is obtained. At this time, the measured value of the wind speed measuring instrument is compared with the measured value of the standard instrument, so that the error value of the wind speed measuring instrument under the current wind speed can be obtained.
Fifth stage:
Then, the piston rod of the electric push rod 33 is controlled to start to retract, firstly, the piston rod drives the fixed rod 43 to slide backwards gradually, the horizontal section of the fixed rod 43 slides backwards in the action groove 42 of the sliding frame 16, the spring 51 at the front side rebounds gradually, the sliding block 49 at the front side slides backwards gradually until the horizontal section of the fixed rod 43 slides backwards to the middle part of the inner side of the action groove 42, and the horizontal section of the fixed rod 43 is kept in contact with both the sliding blocks 49, and the sliding frame 16 is kept motionless in the process.
In this process, the fixing rod 43 drives the transverse sliding frame 35 to slide backwards in the sliding groove 34, the transverse sliding frame 35 continues to drive the longitudinal sliding plate 36 to slide backwards, the deflector rod 41 on the longitudinal sliding plate 36 slides backwards in the lower horizontal section 40 of the second guide groove 37, so that the height of the longitudinal sliding plate 36 is kept unchanged in the backward sliding process, the heights of the upper rack 45 and the lower rack 47 are kept unchanged in the backward sliding process, the upper rack 45 drives the gear 48 to rotate forward in the backward sliding process, and the gear 48 rotating forward drives the two sealing plates 8 to act outwards through the transmission rod 30, the synchronous belt transmission mechanism 31 and the connecting rod mechanism until the verification opening 4 is completely exposed.
When the closing plates 8 are fully opened outwards into place, the upper rack 45 has passed the gear 48, the gear 48 is no longer rotating, neither the transmission rod 30 nor the rotating disc 29 nor the like is acting, and both closing plates 8 remain in the current position and angle. At this time, the horizontal section of the fixing lever 43 is kept in contact with both of the slide blocks 49, both of the front and rear springs 51 are in a freely elongated state, and at this time, the shift lever 41 on the longitudinal slide plate 36 enters the inside of the middle inclined section 39 from the lower horizontal section 40 of the second guide groove 37.
Sixth stage:
As the piston rod of the electric push rod 33 continues to retract, the horizontal section of the fixing rod 43 starts pushing the rear side slider 49, the rear side slider 49 slightly compresses the rear side spring 51, and the rear side spring 51 pushes the entire slider 16 to slide rearward, so that the etalon fixing plate 6 and the measuring instrument fixing plate 7 slide rearward, and the measuring instrument fixing plate 7 gradually descends and the etalon fixing plate 6 gradually ascends. In this process, the piston rod of the electric push rod 33 continues to push the transverse sliding frame 35 to slide backward through the fixing rod 43, the transverse sliding frame 35 continues to drive the longitudinal sliding plate 36 to slide backward, the deflector rod 41 on the longitudinal sliding plate 36 slides backward inside the middle inclined section 39 of the second guide groove 37, so that the height of the deflector rod 41 gradually rises, the deflector rod 41 drives the longitudinal sliding plate 36 to gradually rise inside the transverse sliding frame 35, and the upper side rack 45 and the lower side rack 47 gradually rise in the process of sliding backward.
When the meter fixing plate 7 slides backward to completely enter the calibration box 5, the meter fixing plate 7 descends to the lowest height, and at this time, the meter cross bar 15 is located at the rearmost end of the rear horizontal section of the first guide groove 19, and the meter cross bar 15 cannot slide backward continuously, so that the sliding frame 16 cannot slide backward continuously. At this time, the etalon fixing plate 6 slides backward to enter the verification port 4, the etalon cross bar 13 is located in the middle of the inner side of the middle horizontal section 22 of the first guide groove 19, the etalon is fixed on the etalon fixing plate 6, and the measuring position of the etalon is located at the axis of the verification tube 1.
When the etalon fixing plate 6 and the measuring instrument fixing plate 7 are slid backward into place, the shift lever 41 on the longitudinal slide plate 36 is slid to the rear end of the middle inclined section 39 of the second guide groove 37, and the upper side rack 45 and the lower side rack 47 are slid backward to the highest height, at which time the lower side rack 47 is located at the upper front side of the gear 48 and the rear end of the upper side rack 45 is in primary engagement with the gear 48.
Seventh stage:
As the piston rod of the electric push rod 33 continues to retract, the sliding frame 16 does not continue to move backwards, and the fixing rod 43 continues to slide backwards under the driving of the electric push rod 33, so that the horizontal section of the fixing rod 43 continues to compress the spring 51 at the rear side. Simultaneously, the fixing rod 43 drives the transverse sliding frame 35 to slide backwards in the sliding groove 34, the transverse sliding frame 35 continuously drives the longitudinal sliding plate 36 to slide backwards, the deflector rod 41 on the longitudinal sliding plate 36 slides backwards in the upper horizontal section 38 of the second guide groove 37, the height of the longitudinal sliding plate 36 is kept unchanged in the backward sliding process, the heights of the upper rack 45 and the lower rack 47 are kept unchanged in the backward sliding process, the lower rack 47 drives the gear 48 to rotate reversely in the backward sliding process, the gear 48 drives the transmission rod 30 to rotate reversely, the transmission rod 30 drives the two rotating discs 29 to rotate reversely through the synchronous belt transmission mechanisms 31 at two ends, and the rotating discs 29 drive the third connecting rod 27, the second connecting rod 26 and the first connecting rod 25 to act reversely, so that the two sealing plates 8 rotate to the inside of the verification port 4 again until the two sealing plates 8 completely seal the verification port 4.
At this time, the piston rod of the electric putter 33 is fully retracted, the lower rack 47 is fully passed through the gear 48, and the rear spring 51 is fully compressed. At this point the device as a whole returns to the initial state of the first phase.
And then, adjusting working parameters of the ventilator to adjust the wind speed in the verification tube 1, repeating the steps from the first stage to the seventh stage, and comparing the measured value of the wind speed measuring instrument with the measured value of the standard instrument again according to different wind speeds so as to obtain error values of the wind speed measuring instrument under different wind speeds.
By setting a plurality of groups of different wind speeds, the error value of the wind speed measuring instrument under different wind speeds is obtained, and verification of the wind speed measuring instrument is further completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
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| CN202510041270.5A CN119510815B (en) | 2025-01-10 | 2025-01-10 | Calibrating device for wind speed measuring instrument |
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