CN1315682C - Automatic controlling method for hoist and barrier of larry car in pit - Google Patents
Automatic controlling method for hoist and barrier of larry car in pit Download PDFInfo
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- CN1315682C CN1315682C CNB2004100440084A CN200410044008A CN1315682C CN 1315682 C CN1315682 C CN 1315682C CN B2004100440084 A CNB2004100440084 A CN B2004100440084A CN 200410044008 A CN200410044008 A CN 200410044008A CN 1315682 C CN1315682 C CN 1315682C
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000004888 barrier function Effects 0.000 title 1
- 239000003245 coal Substances 0.000 claims abstract description 16
- 238000005065 mining Methods 0.000 claims abstract description 15
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 12
- 230000005484 gravity Effects 0.000 claims abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 24
- 230000000903 blocking effect Effects 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 238000011143 downstream manufacturing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 2
- 206010000372 Accident at work Diseases 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The present invention discloses a safety controlling method for a pit car to enter and go out of a coal mining well head in coal mines, particularly an automatic controlling method for a hoist and an arrester for a pit car to enter and go out of a coal mining well head, which comprises the following steps: (1) the pit car (1) travels upwards out of the well head (3) under the traction of the forward rotation of the hoist (2); after wheels (1-1) of the pit car (1) roll an upstream sensor (4), the upstream sensor (4) sends a signal so that a motor (5) for closing a door rotates forwards; the rotation of the motor (5) for closing a door drives the arrester (6) to fall so as to block the well head (3); (2) the pit car (1) is used for unload or load; (3) the hoist (2) rotates reversely so that the pit car (1) slides to the well head (3) under the action of gravity; after the wheels (1-1) roll on a ferromagnetic downstream sensor (8) on a rail (7), the ferromagnetic downstream sensor (8) sends a signal to rotate reversely; the rotation of the motor (5) drives the arrester (6) to rise so as to open the well head (3); the pit car (1) enters the underground through the well head (3). All control action does not need human participation. Labor is saved, and accidents can not be caused due to man-made negligence.
Description
Technical field:
The present invention relates to the method for controlling security when mine car is come in and gone out coal mining well well head in a kind of colliery.
Background technology:
In the coal mining activity in colliery, when mine car be raised machine move to aboveground after,, must set up " slope three retainings " in order to prevent that mine car from slipping go back to the down-hole and causing industrial accident, just set up three road spacer devices at outer wellhead, slip go back to the down-hole to prevent mine car.The setting of these spacer devices at present all is to finish by people's manual operations, not only waste of manpower but also cause the accident because of artificial carelessness easily.
Summary of the invention:
Method of controlling security when coming in and going out coal mining well well head in order to overcome existing mine car needs the manual defective of finishing of people, a kind of autocontrol method of gig and arrester when not needing manual mine car to come in and go out coal mining well well head is provided, and it had not only alleviated people's work but also reliable operation.Technical scheme of the present invention is finished by following steps: one, mine car 1 upwards rolls well head 3 away under the traction that gig 2 is rotated in the forward, when the wheel 1-1 of mine car 1 roll across be arranged on ferromagnetic on the track 7 that mine car 1 travelled and go up line sensor 4 after, last line sensor 4 sends signal is rotated in the forward pass door motor 5, and the rotation of closing door motor 5 drives and makes arrester 6 fall to blocking well head 3; Two, mine car 1 work of unloading or freighting; Three, gig 2 contrarotations make mine car 1 slide to well head 3 under the effect of gravity, after the wheel 1-1 of mine car 1 rolls across the ferromagnetic line sensor 8 down that is arranged on the track 7 that mine car 1 travels, following line sensor 8 sends signal and makes 5 counter-rotatings of pass door motor, the rotation of closing door motor 5 drives and makes arrester 6 risings that well head 3 is opened wide, and mine car 1 enters the down-hole by well head 3.Whether the present invention adopts ferromagnetic sensor to survey whether to have left behind the well on the mine car 1 well head 3 and goes into the well and be about to reach well head 3, detects the former signal and just closes well head, closes behind the well head if slip the accident arrester 6 of car and just can block mine car 1.When the signal that detects the latter just promotes arrester 6, mine car 1 can be gone into the well.Because arrester 6 of the present invention is at mine car and just blocks well head under the aboveground situation, avoided the accident of mine car 1 slide car, all control actions do not need people's participation, therefore not only save manpower but also can not cause the accident because of artificial carelessness.Modern design of the present invention, reliable operation, has bigger promotional value.
Description of drawings:
Fig. 1 is each apparatus structure scheme drawing of embodiment of the present invention one, Fig. 2 is the diagram of circuit of the control program that moves in the control circuit in the embodiment two, Fig. 3 is the program flow diagram of embodiment three, Fig. 4 is that the B of Fig. 1 is to view, Fig. 5 is the structural representation of embodiment four, Fig. 6 be the C of Fig. 5 to view, Fig. 7 is the program flow diagram of embodiment five, Fig. 8 is the program flow diagram of embodiment six, and Fig. 9 is the program flow diagram of embodiment seven.
The specific embodiment:
The specific embodiment one: specify present embodiment below in conjunction with Fig. 1 and Fig. 4.Present embodiment is finished by following steps: one, mine car 1 upwards rolls well head 3 away under the traction that gig 2 is rotated in the forward, when the wheel 1-1 of mine car 1 roll across be arranged on ferromagnetic on the track 7 that mine car 1 travelled and go up line sensor 4 after, last line sensor 4 sends signal is rotated in the forward pass door motor 5, and the rotation of closing door motor 5 drives and makes arrester 6 fall to blocking well head 3; Two, mine car 1 work of unloading or freighting; Three, gig 2 contrarotations make mine car 1 slide to well head 3 under the effect of gravity, after the wheel 1-1 of mine car 1 rolls across the ferromagnetic line sensor 8 down that is arranged on the track 7 that mine car 1 travels, following line sensor 8 sends signal and makes 5 counter-rotatings of pass door motor, the rotation of closing door motor 5 drives and makes arrester 6 risings that well head 3 is opened wide, and mine car 1 enters the down-hole by well head 3.Last line sensor 4 and following line sensor 8 all select for use the production of German Tours gram company near switch, because it can be operated in-44 ℃ to 70 ℃ temperature environment.Last line sensor 4 and following line sensor 8 are arranged on the track 7, when the wheel 1-1 of mine car 1 rolls across, will induce electric signal in last line sensor 4 or following line sensor 8.In step 1,, each wheel 1-1 of mine car 1 is arranged on ferromagnetic on the track 7 that mine car 1 travelled behind the line sensor 4 when rolling across, last line sensor 4 sends signal to control circuit, control circuit waited for for 0.2 to 3 second, if wait for during this period of time in do not have follow-up wheel 1-1 to roll across line sensor 4, then send and make the order of closing door motor 5 rotations, arrester 6 falls to blocking well head 3.If have follow-up wheel 1-1 to roll across then waited for for 0.2 to 3 second again.Mine car 1 so is set no matter is and how much save the compartment arrester 6 that can both after all-pass is crossed well head 3, just fall.The motor shaft that closes door motor 5 is connected on the end of leading screw 10, and nut 9 screws on leading screw 10, and nut 9 is fixed on the arrester 6, and arrester 6 slides in guide rail 15, and the forward or reverse that closes door motor 5 makes arrester 6 rise or descend.Up rest position at arrester 6 is provided with position travel switch 12, descending rest position at arrester 6 is provided with upper/lower positions travel switch 13, behind arrester 6 descending arrival upper/lower positions travel switches 13, upper/lower positions travel switch 13 sends signal stops operating pass door motor 5, send signal by the control circuit lock program to control circuit simultaneously, the signal of line sensor 8 under in mine car 1 up process, not accepting; When arrester 6 up arrival are upper put travel switch 12 after, last position travel switch 12 sends signal stops operating pass door motor 5, send signal by the control circuit lock program to control circuit simultaneously, in mine car 1 descending process, do not accept the signal of line sensor 4.
The specific embodiment two: specify present embodiment below in conjunction with Fig. 2.The difference of present embodiment and embodiment one is: the control gig that moves in the control circuit and the flow process of arrester program are as follows: start 101; Judge that mine car is up or descending 102; At 102 step judged result mine cars is up 103, then detects the state 104 (in order to judge the position of arrester) of going up position travel switch and upper/lower positions travel switch; If go up position travel switch closure 105 (proof arrester 6 is in last position), control circuit sends signal and gives gig, gig traction mine car up 106; If upper/lower positions travel switch closure 107 (proof arrester 6 is at upper/lower positions), control circuit sends signal and gives and close door motor and makes it rise arrester, then gig traction mine car up 108 in 104 step judged results; In 104 step judged results if on all not closed 109 (proof arrester 6 is out of control) of position travel switch and upper/lower positions travel switch, the signal 110 of position travel switch or upper/lower positions travel switch closure in the wait (suspend the up of mine car, carry out maintenance work); At 102 step judged result mine cars is descending 111, then detects the state 112 (in order to judge the position of arrester) of going up position travel switch and upper/lower positions travel switch; In 112 step judged results if on position travel switch closure 113 (proof arrester 6 in last position), control circuit sends signal and makes its landing arrester for the pass door motor, control circuit sends signal and gives gig then, gig traction mine car descending 114; If upper/lower positions travel switch closure 115 (proof arrester 6 is at upper/lower positions), control circuit sends signal and gives gig, gig traction mine car descending 116; In 112 step judged results if on all not closed 117 (proof arrester 6 is out of control) of position travel switch and upper/lower positions travel switch, the signal 118 of position travel switch or upper/lower positions travel switch closure in the wait (suspend the descending of mine car, carry out maintenance work); So be provided with, before gig work, check the location status of arrester, can make go into the well on the mine car safer.
The specific embodiment three: specify present embodiment below in conjunction with Fig. 3.The difference of present embodiment and embodiment one is: control circuit moves the program of secondary detection in mine car 1 up way, its flow process is as follows: the state 201 of position travel switch in the detection (in order to judge the position of arrester); If go up position travel switch closure 202 (proof arrester 6 is in last position), control circuit sends signal and gives gig, gig traction mine car up 203; In 201 step judged results if on position travel switch not closed 204 (proof arrester 6 is not in last positions), control circuit sends signal and gives and close door motor and makes its rise arrester 205; Whether the position travel switch closed 206 in the judgement; The result is for being, then gig traction mine car up 208; In 206 step judged results is (not prove that arrester 6 is out of control), then wait for the signal of going up position travel switch closure, close the electrical motor of gig simultaneously, the main shaft of giving an order the locking gig for the band-type brake system of gig, carry out audio alert 207 (suspend the up of mine car, carry out maintenance work) by speech chip; So be provided with, can prevent the people closes arrester in the up process of mine car 1 contingency.
The specific embodiment four: specify present embodiment below in conjunction with Fig. 5 and Fig. 6.The difference of present embodiment and embodiment one is: well head 3 places also are provided with optical sensor, the transmitting terminal 14-1 of optical sensor is arranged on a side of the track 7 of mine car 1, the receiving end 14-2 of optical sensor is arranged on the opposite side of the track 7 of mine car 1, the height in the line between the transmitting terminal 14-1 of optical sensor and the receiving end 14-2 of optical sensor and the compartment of mine car 1 identical and and the track 7 angulation A of mine car 1 at 30 degree between 60 degree, when mine car 1 up by behind the last line sensor 4, last line sensor 4 sends signal to control circuit, control circuit waited for for 0.2 to 3 second, if wait for during this period of time in do not have follow-up wheel 1-1 to roll across line sensor 4, control circuit detects the state of optical sensor, if do not covered between the transmitting terminal 14-1 of optical sensor and the 14-2, then send and make the order of closing door motor 5 rotations, arrester 6 falls to blocking well head 3; If covered between the transmitting terminal 14-1 of optical sensor and the 14-2, wait for then between the transmitting terminal 14-1 of optical sensor and 14-2 not covered that send and make the order of closing door motor 5 rotations, arrester 6 falls to blocking well head 3.So be provided with, many detect step together, when preventing that the hoisting speed of mine car 1 is too slow, arrester falls too early, takes place with accident prevention.Because the transmitting terminal 14-1 of optical sensor and the line out of plumb track 7 of receiving end 14-2, so even mine car 1 is multi-node, the gap between mine car 1 joint and the joint can not influence the work of optical sensor.
The specific embodiment five: specify present embodiment below in conjunction with Fig. 7.The difference of present embodiment and embodiment one is: in a upstream or downstream process of mine car, control circuit is before sending landing or rising the order of arrester, and whether line sensor or following line sensor were triggered twice 301 in the judgement; The result is for being, then control circuit sends landing or rises the order 302 of arrester; The result is not, and then control circuit does not send the order 303 of landing or rise arrester.So be provided with, cause misoperation when preventing other ferromagnetic object through last line sensor 4 or following line sensor 8.
The specific embodiment six: specify present embodiment below in conjunction with Fig. 8.The difference of present embodiment and embodiment four is: the program circuit that receives the signal control arrester of optical sensor in the control circuit is: optical sensor 401 (proof has mine car 1 through well head 3) that are triggered; Judge whether energizing signal disappears 402; The result then returns the starting end of step 402 for not; The result of 402 steps is for being to judge then whether gig is rotated in the forward 403; The result is not, and then arrester keeps motionless; The result of 402 steps then makes the pass door motor be rotated in the forward for being, makes arrester fall 405; The result of 402 steps is that then arrester does not keep motionless 404.Mine car 1 so is set to be drawn to and not to readvance behind the well head 3 but return unnecessary the falling of situation arrester in shaft bottom.
The specific embodiment seven: specify present embodiment below in conjunction with Fig. 9.The difference of present embodiment and embodiment one is: the control flow of arrester 6 is: whether line sensor is triggered 501 in the judgement; The result is for being, then goes up line sensor and sends to make and close the signal that door motor is rotated in the forward, and keep this signal 502; The result then returns the starting end of step 501 for not; Then judge upper/lower positions travel switch whether closed 503; The result then returns the starting end of step 502 for not; The result then makes the pass door motor stop the rotation for being, keeps going up making of line sensor simultaneously and closes the signal 504 that door motor is rotated in the forward; Judge then whether line sensor is triggered 505 down; The result then descends line sensor to send and makes the signal that closes the door motor contrarotation, and keep this signal 506 for being; The result then returns the starting end of step 505 for not; Judge to go up position travel switch whether closed 507 then; The result then returns the starting end of step 506 for not; The result then makes the pass door motor stop the rotation for being, keeps the signal 508 that makes pass door motor contrarotation of line sensor down simultaneously; Return the starting end of step 501 at last.So be provided with, open or close arrester, close door motor and can both make the arrester self-return, prevent the generation of contingency as human manually operated mode.
Claims (8)
- The autocontrol method of gig and arrester when 1, mine car is come in and gone out coal mining well well head, it is characterized in that it is finished by following steps: one, mine car (1) upwards rolls well head (3) away under the traction that gig (2) is rotated in the forward, when the wheel (1-1) of mine car (1) roll across be arranged on ferromagnetic on the track (7) that mine car (1) travelled and go up line sensor (4) after, last line sensor (4) sends signal is rotated in the forward pass door motor (5), and the rotation of closing door motor (5) drives and makes arrester (6) fall to blocking well head (3); Two, mine car (1) work of unloading or freighting; Three, gig (2) contrarotation makes mine car (1) slide to well head (3) under the effect of gravity, after the wheel (1-1) of mine car (1) rolls across the ferromagnetic line sensor (8) down that is arranged on the track (7) that mine car (1) travelled, following line sensor (8) sends signal and makes pass door motor (5) counter-rotating, the rotation of closing door motor (5) drives and makes arrester (6) rising that well head (3) is opened wide, and mine car (1) enters the down-hole by well head (3); Up rest position at arrester (6) is provided with position travel switch (12), descending rest position at arrester (6) is provided with upper/lower positions travel switch (13), behind arrester (6) descending arrival upper/lower positions travel switch (13), upper/lower positions travel switch (13) sends signal stops operating pass door motor (5), send signal by the control circuit lock program to control circuit simultaneously, in the up process of mine car (1), do not accept the signal of line sensor (8) down; When the up arrival of arrester (6) is upper put travel switch (12) after, last position travel switch (12) sends signal stops operating pass door motor (5), send signal by the control circuit lock program to control circuit simultaneously, in the descending process of mine car (1), do not accept the signal of line sensor (4).
- 2, the autocontrol method of gig and arrester when mine car according to claim 1 is come in and gone out coal mining well well head, it is characterized in that in step 1 each wheel (1-1) when mine car (1) roll across be arranged on ferromagnetic on the track (7) that mine car (1) travelled and go up line sensor (4) after, last line sensor (4) sends signal to control circuit, control circuit waited for for 0.2 to 3 second, if wait for during this period of time in do not have follow-up wheel (1-1) to roll across line sensor (4), then send and make the order of closing door motor (5) rotation, arrester (6) falls to blocking well head (3); If have follow-up wheel (1-1) to roll across then waited for for 0.2 to 3 second again.
- The autocontrol method of gig and arrester when 3, mine car according to claim 2 is come in and gone out coal mining well well head is characterized in that the flow process of the control gig that moves in the control circuit and arrester program is as follows: start (101); Judge that mine car is up or descending (102); Mine car is up (103), then detects the state (104) of going up position travel switch and upper/lower positions travel switch; If go up position travel switch closure (105), control circuit sends signal and gives gig, gig traction mine car up (106); If upper/lower positions travel switch closure (107), control circuit sends signal and makes it rise arrester for the pass door motor, then gig traction mine car up (108); If go up position travel switch and upper/lower positions travel switch all not closed (109), the signal (110) of position travel switch or upper/lower positions travel switch closure in the wait; Mine car is descending (111), then detects the state (112) of going up position travel switch and upper/lower positions travel switch; If go up position travel switch closure (113), control circuit sends signal and makes its landing arrester for the pass door motor, and control circuit sends signal and gives gig then, gig traction mine car descending (114); If upper/lower positions travel switch closure (115), control circuit are sent signal and are given gig, gig traction mine car descending (116); If go up position travel switch and upper/lower positions travel switch all not closed (117), the signal (118) of position travel switch or upper/lower positions travel switch closure in the wait.
- The autocontrol method of gig and arrester when 4, mine car according to claim 3 is come in and gone out coal mining well well head, it is characterized in that control circuit moves the program of secondary detection in the up way of mine car (1), its flow process is as follows: the state of position travel switch (201) in the detection; If go up position travel switch closure (202), control circuit sends signal and gives gig, gig traction mine car up (203); If go up position travel switch not closed (204), control circuit sends signal and makes it rise arrester (205) for the pass door motor in (201) step judged result; Position travel switch whether closed (206) in the judgement; The result is for being, then gig traction mine car up (208); For not, then wait for the signal of going up position travel switch closure in (206) step judged result, close the electrical motor of gig simultaneously, the main shaft of giving an order the locking gig for the band-type brake system of gig carries out audio alert (207) by speech chip.
- 5, the autocontrol method of gig and arrester when mine car according to claim 2 is come in and gone out coal mining well well head, it is characterized in that well head (3) locates also to be provided with optical sensor, the transmitting terminal of optical sensor (14-1) is arranged on a side of the track (7) of mine car (1), the receiving end of optical sensor (14-2) is arranged on the opposite side of the track (7) of mine car (1), the height in the line between the receiving end (14-2) of the transmitting terminal of optical sensor (14-1) and optical sensor and the compartment of mine car (1) identical and and track (7) angulation (A) of mine car (1) at 30 degree between 60 degree, when mine car (1) up by behind the last line sensor (4), last line sensor (4) sends signal to control circuit, control circuit waited for for 0.2 to 3 second, if having follow-up wheel (1-1) to roll across then waited for for 1 to 3 second again; If wait for during this period of time in do not have follow-up wheel (1-1) to roll across line sensor (4), control circuit detects the state of optical sensor, if do not covered between transmitting terminal of optical sensor (14-1) and the receiving end (14-2), then send and make the order of closing door motor (5) rotation, arrester (6) falls to blocking well head (3); If covered between transmitting terminal of optical sensor (14-1) and the receiving end (14-2), then wait between transmitting terminal (14-1) up to optical sensor and the receiving end (14-2) and not covered, send and make the order of closing door motor (5) rotation, arrester (6) falls to blocking well head (3).
- The autocontrol method of gig and arrester when 6, mine car according to claim 5 is come in and gone out coal mining well well head is characterized in that the program circuit that receives the signal control arrester of optical sensor in the control circuit is: optical sensor be triggered (401); Judge energizing signal whether disappear (402); The result then returns the starting end of step (402) for not; (402) result of step is for being to judge then whether gig is rotated in the forward (403); The result is not, and then arrester keeps motionless; (402) result of step then makes the pass door motor be rotated in the forward for being, arrester is fallen.
- The autocontrol method of gig and arrester when 7, mine car according to claim 2 is come in and gone out coal mining well well head, it is characterized in that in a upstream or downstream process of mine car, control circuit before sending landing or rising the order of arrester, line sensor or time line sensor whether be triggered twice (301) in judgements; The result is for being, then control circuit sends landing or rises the order (302) of arrester; The result is not, and then control circuit does not send the order (303) of landing or rise arrester.
- The autocontrol method of gig and arrester when 8, mine car according to claim 1 is come in and gone out coal mining well well head is characterized in that the control flow of arrester (6) is: line sensor whether be triggered (501) in the judgement; The result is for being, then goes up line sensor and sends to make and close the signal that door motor is rotated in the forward, and keep this signal (502); The result then returns the starting end of step (501) for not; Then judge upper/lower positions travel switch whether closed (503); The result then returns the starting end of step (502) for not; The result then makes the pass door motor stop the rotation for being, keeps going up making of line sensor simultaneously and closes the signal (504) that door motor is rotated in the forward; Judge down line sensor whether be triggered (505) then; The result then descends line sensor to send and makes the signal that closes the door motor contrarotation, and keep this signal (506) for being; The result then returns the starting end of step (505) for not; Judge to go up position travel switch whether closed (507) then; The result then returns the starting end of step (506) for not; The result then makes the pass door motor stop the rotation for being, keeps the signal (508) that makes pass door motor contrarotation of line sensor down simultaneously; Return the starting end of step (501) at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100440084A CN1315682C (en) | 2004-11-04 | 2004-11-04 | Automatic controlling method for hoist and barrier of larry car in pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100440084A CN1315682C (en) | 2004-11-04 | 2004-11-04 | Automatic controlling method for hoist and barrier of larry car in pit |
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| Publication Number | Publication Date |
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| CN1613706A CN1613706A (en) | 2005-05-11 |
| CN1315682C true CN1315682C (en) | 2007-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100440084A Expired - Fee Related CN1315682C (en) | 2004-11-04 | 2004-11-04 | Automatic controlling method for hoist and barrier of larry car in pit |
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| CN (1) | CN1315682C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109989147A (en) * | 2019-03-30 | 2019-07-09 | 深圳市乐事通电子工业有限公司 | It is full-automatic to move knife air blowing control system |
| CN111309232B (en) * | 2020-02-24 | 2021-04-27 | 北京明略软件系统有限公司 | Method and device for adjusting display area |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4610207A (en) * | 1983-12-13 | 1986-09-09 | Georg Uttscheid | Positioning device for the trolleys of an electric overhead trolley conveyor |
| US4667602A (en) * | 1985-05-24 | 1987-05-26 | Gerber Garment Technology, Inc. | Escapement mechanism |
| CN2288892Y (en) * | 1997-03-14 | 1998-08-26 | 张建军 | Mining normally closed type inclined shaft anti-running monitoring device |
| CN2303083Y (en) * | 1997-07-02 | 1999-01-06 | 西安矿业学院 | Intelligent inclined shaft transportation vehicle protection device |
| CN2550229Y (en) * | 2002-06-02 | 2003-05-14 | 扬州市矿务局王庄煤矿 | Swing link type inclined shaft anti-sliding device |
| CN2637278Y (en) * | 2003-08-18 | 2004-09-01 | 尹慧民 | Pressure sensing type slant lane sport car protective device |
-
2004
- 2004-11-04 CN CNB2004100440084A patent/CN1315682C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4610207A (en) * | 1983-12-13 | 1986-09-09 | Georg Uttscheid | Positioning device for the trolleys of an electric overhead trolley conveyor |
| US4667602A (en) * | 1985-05-24 | 1987-05-26 | Gerber Garment Technology, Inc. | Escapement mechanism |
| CN2288892Y (en) * | 1997-03-14 | 1998-08-26 | 张建军 | Mining normally closed type inclined shaft anti-running monitoring device |
| CN2303083Y (en) * | 1997-07-02 | 1999-01-06 | 西安矿业学院 | Intelligent inclined shaft transportation vehicle protection device |
| CN2550229Y (en) * | 2002-06-02 | 2003-05-14 | 扬州市矿务局王庄煤矿 | Swing link type inclined shaft anti-sliding device |
| CN2637278Y (en) * | 2003-08-18 | 2004-09-01 | 尹慧民 | Pressure sensing type slant lane sport car protective device |
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| Publication number | Publication date |
|---|---|
| CN1613706A (en) | 2005-05-11 |
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