CN2305668Y - Improved pressure gauge transmission components - Google Patents

Abstract

The utility model relates to an improved generation manometer drive assembly, manometer mainly include base, surface and drive assembly, and drive assembly mainly includes pedestal, piston, transfer line, spring and gear, the utility model discloses a characteristic is in utilizing the terminal outlet pressure of inlet duct, to the piston drive to and make the piston promote the transfer line and the rack that links and make a transmission, make rack toothing gear, and then the drive indicates to its pilot pressure, and make the motion that the pointer tended to return to zero by the spring. The utility model discloses by the simple and easy and convenience of component equipment, make the utility model discloses reach reduction in production cost, transport the process not fragile and the effect of easily maintaining of precision.

Description

Improved pressure gauge transmission components

The utility model belongs to an in-meter transmission component of a pressure gauge for measuring fluid pressure in a container.

Pressure gauges are used in various containers, whether they are closed or open, the pressure gauge has the function of measuring the pressure in the container, and can indirectly provide the user with certainty about the fluid stock in the container. The internal fluid has a safety warning function. For example, the pressure gauge can be used to know the expansion pressure of the fluid in the container, so that people can avoid explosion accidents caused by gas expansion when the high temperature is connected to the container. The pressure gauge is popular. And it is widely used.

The commonly used pressure gauge is mainly a Bourdon tube (also translated as Barton tube) type pressure gauge. The transmission component is culverted between the base and the surface. After entering the Bourdon tube, since the end of the Bourdon tube is closed, the gas poured in will make the Bourdon tube expand, and a high-sensitivity transmission part will be driven by the volume difference of the expansion, and the transmission part will be connected with a gear. The gear connected to the end of the pointer is driven to measure the pressure, and a spring is used to drive the pointer to return to zero in the depressurized state. From the operation of the above-mentioned traditional Bourdon tube pressure gauge, it is possible to study its structure in detail, and further understand the shortcomings of its structure.

①. For this type of pressure gauge, the Bourdon tube, which is the main component, must be rolled and rolled from copper sheet, and the manufacturing process is relatively difficult.

②. The transmission part is composed of several transmission parts connected to match the arc shape. The combination must be completed by machinery, and the manufacturing process is not easy.

③. Bourdon tube, its two end faces are welded with the air intake duct and the transmission rod with solder respectively, and the welding part is difficult to overcome due to technology, and sometimes there is a leak, which causes pressure release and affects the pressure measurement accuracy.

④, the aforementioned items ① and ②, due to the complicated components and assembling, the manufacturing cost is also higher.

⑤. For items ① and ② mentioned above, due to the many joints of components, the damage rate during transportation is also high.

Therefore, there are many people who have improved it, but it is difficult to get rid of it. There is also a so-called diaphragm (drum) pressure gauge, which uses the pressure of the intake air to expand a diaphragm (drum) to make the center of the diaphragm protrude. And the driving column center drives the pointer connecting rod, and the pointer branch rod is rotated by the end of the screw rod, and at the same time, the pointer is returned to zero by a spring in the depressurized state. And this kind of pressure gauge also still has some missing. That is, ①, the bottom of the diaphragm is a closed space, and it is difficult to correct and return to zero when the pressure gauge is elastically fatigued or out of alignment. ②. In terms of production technology, this kind of common use is also mostly assembled by mechanical methods, and the assembly is still complicated. ③, the production difficulty is high, and of course the cost is relatively increased, which is detrimental to economic benefits. ④ Collision during transportation can easily lead to damage to the finished product.

The purpose of this utility model is to design a pressure gauge transmission assembly with simple structure, easy manufacture and assembly, high sensitivity and precision and low manufacturing cost for the above-mentioned shortcomings existing in the existing pressure gauge transmission assembly.

The main technical solutions of the utility model are as follows:

An improved pressure gauge transmission assembly, which is located in the interlayer between the surface of the pressure gauge and the base, and is the main component of the pressure gauge for sensing, transmitting and responding to pressure. It mainly includes a base, a piston, a transmission rod, and a spring And gears, racks, of which:

One side of the seat body is a hollow column, which extends in the tangential direction of the column to form a symmetrical upper and lower symmetrical piece; one end of the hollow column is a sealing wall, and an air duct runs through the sealing wall, and the other end is screw-sealed. Nut;

A gear hole matched with the gear is pierced at an appropriate position on the surface of the upper symmetrical piece, and a shallow groove corresponding to the gear hole is recessed on the inner surface of the lower symmetrical piece;

The gear is inserted into the gear hole of the upper symmetrical piece, and its axially extending rod connects the pointer on the surface upwards, and sinks into the shallow groove downwards, and the gear column itself meshes with the tooth pattern of the vertical part of the rack connected to the end of the transmission rod;

The end of the transmission rod is a cylinder, the outer diameter of which is slightly smaller than the inner diameter of the hollow column, just plugged into the hollow column; the end face of the transmission rod body extends a rod in the axial direction; the rear part of the rod is threaded, and the threaded screw Enter the screw hole set on the horizontal part of the rack and adjust the depth;

The spring culvert is set on the outer edge of the transmission rod, and is set in the hollow column, and is clamped by the inner surface of the hollow column nut and the cylinder end surface of the transmission rod;

The end surface of the piston is surrounded by a rubber flap in the shape of a screw bell, which is arranged between the sealing wall of the hollow column and the cylinder of the transmission rod, and the bell mouth faces the end of the air guide tube.

The utility model has the following advantages:

(1) The structure of each component is simple, and the assembly is convenient. Most of the components can be assembled by hand. Thereby ① saving production man-hours. ②Reduce the production of finished products, which is in line with economic benefits.

(2) Most of the components of the utility model are not installed by mechanisms. Therefore, during the transportation process, due to the precise assembly, there are many contacts, the fragility of the connection, the anti-fragility, etc. are less likely to occur in the utility model .

(3) The utility model is not assembled by welding, which reduces the possibility of pores caused by welding, and is easier to maintain the sensitivity and accuracy of the instrument.

(4), the screw thread at the rod body rear part of the transmission rod of the present utility model can be used to adjust and correct the accuracy of the pressure gauge under long-term use by means of a screw in the screw hole of the horizontal part of the rack.

The utility model is described below in conjunction with accompanying drawing:

Fig. 1 is a three-dimensional exploded view of the utility model

Figure 2 is a schematic diagram of the action of the utility model

Figure 3 is a schematic diagram of the A-A section of Figure 2

Please refer to Figure 1, the utility model is an improved structure of a pressure gauge transmission assembly, which is located in the interlayer between the pressure gauge surface 32 and the base 31, and is the main component of the pressure gauge for sensing, transmission and reaction pressure, wherein:

The transmission assembly mainly includes a base 34, a piston 35, a transmission rod 36, a spring 37 and a gear 38 wherein:

One side of the seat body 34 is a hollow column 341, and the hollow column 341 extends in a tangential direction to form a symmetrical upper and lower symmetrical piece 342, 343; one end of the hollow column 341 is a sealing wall 344, and the sealing wall 344 runs through An air guide tube 345, and a nut 346 is screwed on the other end surface.

An adjacent gear hole 347 of the same size is pierced at an appropriate position on the surface of the upper symmetrical piece 342 ; a shallow groove 348 is recessed on the inner surface of the lower symmetrical piece 343 corresponding to the gear hole 347 .

The gear 38 is taken in by the gear hole 347 of the upper symmetrical piece 342, and its axially extending rod 381 connects upward to the pointer 321 of the surface 32, and sinks into the shallow groove 348 downward, while the gear 38 itself is connected by the rack at the end of the transmission rod 36. 39 thread 391 transmission;

Transmission rod 36, its end is a cylinder 361, and its cylinder 361, outer diameter is slightly smaller than the inner diameter of hollow column 341, and can just plug in the hollow column 341, and the end of cylinder 361 extends axially a rod body 362 The rear part of the rod body 362 is threaded 363, and the end of the rod body 362 is connected with a tooth bar 39. A screw hole 394 is established on the inner surface of the transverse part 392 of the rack body 39, which can be screwed into and adjusted in depth by the screw thread 363 at the rear part of the rod body 362. Calibrate and return to zero, and the outside of the vertical part 393 of the rack 39 is a tooth pattern 391, and the tooth pattern 391 and the gear 38 can be in a transmission (engagement) moving state.

The spring 37 covers the outer edge of the rod body 362 of the transmission rod 36, and is located in the hollow column 341, and is clamped by the inner surface of the nut 346 and the end surface of the cylinder 361 of the transmission rod 36;

Piston 35, one end surface is surrounded by rubber flap 351 to form a trumpet shape, and is arranged between the sealing wall 344 of hollow column 341 and the cylinder 361 of transmission rod 36. , the air guide tube 345 passes through the pressure gauge base 31 and enters.

Please refer to Fig. 2 and Fig. 3 for the operation of the present utility model. When the gas to be measured enters through the air duct 345 pierced by the base 31, it is poured into the piston 35, and the horn surrounded by the tail rubber flap 351 After the mouth is under pressure, it advances toward the cylinder 361 of the transmission rod 36, which displaces the rack 39, and the teeth 391 of the rack 39 engage the gear 38, so that the extension rod 381 rotates the pointer 321 of the surface 32. Thus, the pointer 321 can display the degree of pressure.

And when the pressure drops, the spring 37 forces the transmission rod 36 to push back due to the elastic effect, and then the rack 39 is pushed back, and the pointer 321 is driven to return to zero.

The screw thread 363 at the rear portion of the drive rod 36 is adjusted in a screw hole 394 in the horizontal portion 392 of the rack 39, depending on the correction degree.

Claims (1)

An improved pressure gauge transmission assembly, which is located in the interlayer between the surface of the pressure gauge and the base, is the main component of the pressure gauge for sensing, transmitting and responding to pressure, and is characterized in that it mainly includes a base [34], a piston [35], a transmission rod [36], a spring [37] and gear [38], rack [39], wherein: One side of the seat body [34] is a hollow column [341], and extends in the tangential direction of the cylinder to form a symmetrical upper and lower symmetrical piece [342, 343]; one end surface of the hollow column [341] is a sealing wall [344 ], an air duct [345] runs through the sealing wall, and a nut [346] is screw-sealed on the other end; A gear hole [347] cooperating with the gear [38] is perforated at an appropriate position on the surface of the upper symmetrical piece [342], and a shallow groove [348] is recessed corresponding to the gear hole [347] on the inner surface of the lower symmetrical piece [343]; The gear [38] is taken in by the gear hole [347] of the upper symmetry piece [342], and its axial extension rod [381] connects the pointer [321] of the surface [32] upwards, and sinks into the shallow groove [348] downwards, and The gear post itself then engages with the teeth [391] of the vertical part [393] of the rack [39] connected to the transmission rod [36] end; The end of the transmission rod [36] is a cylinder [361], and the outer diameter of the cylinder [361] is slightly smaller than the internal diameter of the hollow column [341], which is just inserted into the hollow column [341]; the transmission rod [36] body The end face of the rod body [362] is axially extended; the rear part of the rod body [362] is threaded [363], and the threaded thread [363] is screwed into the screw hole [394] provided by the transverse part [392] of the rack [39] and adjust the depth; The spring [37] covers the outer edge of the transmission rod [36] rod body [362], is located in the hollow column [341], and is subjected to the inner surface of the hollow column nut [346] and the cylinder [361] of the transmission rod [36] end clamping; One end surface of the piston [35] is surrounded by a rubber flap [351] in the shape of a screw bell, and is arranged between the sealing wall [344] of the hollow column [341] and the cylinder [361] of the transmission rod [36], and the bell mouth faces to the end of the airway [345].

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