CN109538808B - Gas meter pipeline opening and closing control device - Google Patents
Gas meter pipeline opening and closing control device Download PDFInfo
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- CN109538808B CN109538808B CN201910066041.3A CN201910066041A CN109538808B CN 109538808 B CN109538808 B CN 109538808B CN 201910066041 A CN201910066041 A CN 201910066041A CN 109538808 B CN109538808 B CN 109538808B
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- valve rod
- pressure relief
- sealing
- area side
- valve
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- 238000007789 sealing Methods 0.000 claims abstract description 91
- 230000007246 mechanism Effects 0.000 claims abstract description 58
- 230000009467 reduction Effects 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 29
- 230000009471 action Effects 0.000 description 13
- 239000002737 fuel gas Substances 0.000 description 8
- 235000000621 Bidens tripartita Nutrition 0.000 description 7
- 240000004082 Bidens tripartita Species 0.000 description 7
- 208000006637 fused teeth Diseases 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- 239000005060 rubber Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
- F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
- F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
Abstract
The invention relates to the technical field of gas meters, and provides a gas meter pipeline opening and closing control device, which comprises a shell, wherein a valve rod is arranged on the shell in a penetrating way; a sealing device is also arranged between the shell and the valve rod; a motor and a gear reduction mechanism are arranged in the shell; the casing is also internally provided with a cam mechanism for driving the valve rod to open and close and a reset elastic piece for providing reset elastic force for the valve rod; the motor is in transmission connection with the cam mechanism through a gear reduction mechanism. According to the gas meter pipeline opening and closing control device, the cam mechanism and the elastic reset piece are arranged to control the opening and closing of the valve rod, and the valve rod can be opened and closed according to a planned rule only by designing a corresponding curve profile; in the running process of the mechanism, the phenomenon of locked rotor or separation or collision between moving parts does not exist, the mechanism is simple, the movement rule is accurate and reliable, the device is rapidly closed, and the power consumption is low.
Description
Technical Field
The invention relates to the technical field of gas meters, in particular to a gas meter pipeline opening and closing control device.
Background
In the prior art, the metering and safety monitoring management of the fuel gas of urban and rural residents and small-sized fuel gas facilities are carried out through intelligent fuel gas meters installed on fuel gas pipelines, and the intelligent fuel gas meters are internally provided with fuel gas meter pipeline opening and closing devices according to the requirement of remote automatic management. In recent years, with the development of gas meter industry technology, the requirements on a matched gas meter pipeline opening and closing device are higher and higher, especially in the aspects of reducing failure rate, improving environmental adaptability and saving manufacturing cost. The early gas meter pipeline opening and closing device mainly comprises an electric device driving nut and a screw rod which are in linear reciprocating movement formed by threaded transmission, so that the gas pipeline is opened and closed. Although this device is simple in structure and low in cost, it has a number of drawbacks: 1. in order to ensure that the pipeline is tightly and air-tight after the device is closed, a motor mechanism is required to perform locked-rotor operation; the motor is locked up and is operated with high consumption of power consumption, and the locked up mode is easy to cause the screw transmission structure to be blocked, that is, the device can not be opened again after being closed in place. 2. Because the processing precision requirements of the screw-driven nut and the screw are higher, the set processing precision requirements are often not met in the manufacturing process, and when the screw is driven by the nut driven in the working process to reciprocate for opening and closing, the clamping phenomenon of the nut and the screw is easy to occur, and the opening and closing of the device cannot be completed accurately, reliably and stably in time. 3. In order to ensure that the nut and screw transmission can stably realize the opening and closing of the valve, the nut and screw transmission has higher requirements on the environment, and when the screw threads on the nut or screw bind impurities, the nut and screw transmission cannot stably and reliably realize the opening and closing of the device; and when the nut and the screw are worn due to stress, poor transmission of the nut and the screw is caused, so that the opening and closing of the device are affected.
In order to solve the defects of the early gas pipeline opening and closing device, the device is mainly opened and closed in a ratchet rack structure mode at present. The patent with the application publication number of CN103398209A, named as a gas meter motor switch valve, discloses a device for controlling the switch of a valve on a gas pipeline, which comprises a reduction gear connected with a valve body motor in a transmission way; a ratchet ring gear is rotationally connected on the outer circle of the shaft sleeve of the valve body inner cavity positioning bracket; the ratchet ring gear is meshed with a rack of a control rod which is elastically connected to the positioning bracket; a ratchet bracket is arranged in the deep hole of the ratchet ring gear, the ratchet bracket is rotationally connected with a shaft sleeve hole of the positioning bracket through a rotating shaft at the lower end of the ratchet bracket, and a guide groove of a ratchet is slidingly connected with a positioning shaft of the ratchet bracket; the upper and lower positioning teeth of the ratchet wheel are correspondingly meshed with or separated from the inner teeth of the ratchet wheel ring gear; the ratchet wheel is meshed with the ratchet wheel gear. The gas pipeline opening and closing device with the structure has the function of quick auxiliary closing of the spring, and has small closing power consumption, but has the following defects: 1. the ratchet mechanism is complex, and the size of the transmission teeth is small due to the limitation of space, so that manufacturing errors, tiny impurities or assembly defects are easy to cause the ratchet mechanism to fail. 2. The last stage transmission adopts the cooperation of gear and rack, and in order to reach the purpose of not blocking up the commentaries on classics, rack and gear can adopt the structure of tripping, under the assistance of spring force, gear and rack can be continuous striking when the limit of device closing or opening, not only can produce great noise, can lead to the tooth damage of gear or rack serious moreover, and then influence opening and closing of device, serious person can cause the device inefficacy. 3. The adaptability to various pressure environments is poor, and the sealing sleeve can be subjected to positive pressure or negative pressure environments in the process of inspection and actual use, so that the problem that the opening and closing performances of the device are affected due to the fact that the sealing sleeve bulges or contracts easily occurs.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the gas meter pipeline on-off control device is high in reliability.
The technical scheme adopted for solving the technical problems is as follows: the gas meter pipeline opening and closing control device comprises a shell, wherein a valve rod is arranged on the shell in a penetrating way; a sealing device is also arranged between the shell and the valve rod; a motor and a gear reduction mechanism are arranged in the shell; the casing is also internally provided with a cam mechanism for driving the valve rod to open and close and a reset elastic piece for providing reset elastic force for the valve rod; the motor is in transmission connection with the cam mechanism through a gear reduction mechanism.
Further, the cam mechanism comprises a disc cam arranged in the shell and a roller arranged on the valve rod; the outer edge of the disc cam is a curve outline; the roller is locked with the curved profile of the cam plate.
Further, the disc cam is located between the roller and the sealing means in a direction along the axial direction of the valve stem.
Further, the reset elastic piece is a columnar compression spring.
Further, the revolution center line of the disc cam, the revolution center line of the roller and the axis of the valve rod are in the same plane.
Further, the sealing device comprises a shaft sleeve sleeved on the valve rod and arranged on the shell, a sealing ring arranged between the inner wall of the shaft sleeve and the valve rod, and a limiting part for axially limiting the sealing ring.
Further, the sealing device is also provided with a first pressure relief structure for relieving pressure from the motor area side to the valve seat area side and a second pressure relief structure for relieving pressure from the valve seat area side to the motor area side.
Further, the first pressure relief structure comprises a first pressure relief hole formed by an inner hole of the sealing ring; the second pressure relief structure comprises at least one second pressure relief hole arranged on the sealing ring.
Further, the limiting piece comprises a limiting flange which is positioned at the motor area side of the sealing ring and arranged on the inner wall of the shaft sleeve, and a gland which is positioned at the valve seat area side of the sealing ring, sleeved on the valve rod and detachably arranged on the shaft sleeve.
Further, a sliding groove which is in sliding fit with the valve rod is also arranged in the shell.
The beneficial effects of the invention are as follows: according to the gas meter pipeline opening and closing control device, the cam mechanism and the elastic reset piece are arranged to control the opening and closing action of the valve rod, and the valve rod can be opened and closed according to a planned rule only by designing a corresponding curve profile; in the running process of the mechanism, the phenomenon of locked rotor or separation or collision between moving parts does not exist, the mechanism is simple, the movement rule is accurate and reliable, the device is rapidly closed, and the power consumption is low. The device not only solves the defects of simple threaded transmission structure, unreliable operation caused by locked rotation and clamping, but also solves the defects of complex ratchet rack transmission mechanism, unreliable operation caused by impact damage caused by transmission tripping, and the like. Through setting up pressure release structure, make whole device have better adaptability to various pressure environment.
Drawings
FIG. 1 is a schematic diagram of a gas meter pipeline opening and closing control device of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of the connection position of the motor wire and the threading hole in the invention;
FIG. 4 is an enlarged view at A in FIG. 1;
FIG. 5 is a schematic diagram of the seal ring in the gas meter pipeline opening and closing control device of the invention.
The reference numerals in the drawings are: 1-casing, 2-valve rod, 3-sealing device, 4-motor, 5-gear reduction mechanism, 6-cam mechanism, 7-reset elastic piece, 8-valve seat, 11-chute, 12-motor back cover, 13-casing, 14-end cover, 15-mounting rack, 16-threading hole, 17-motor wire, 18-outgoing wire sealing rubber plug, 21-valve sealing skeleton, 22-valve sealing gasket, 31-shaft sleeve, 32-sealing ring, 33-limiting piece, 34-first pressure relief hole, 35-second pressure relief hole, 61-disk cam, 62-roller, 81-air inlet, 82-air outlet, 83-valve rod port, 331-limiting flange, 332-gland, 341-first sealing lip segment, 342-first opening segment, 351-second sealing lip segment, 352-second opening segment.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
for convenience of description, the terms "left", "right", "upper", "lower" and "upper" are used hereinafter in accordance with the left, right, upper and lower directions of the drawings themselves, but do not limit the structure of the present invention.
The invention relates to a gas meter pipeline opening and closing control device, which comprises a shell 1, wherein a valve rod 2 is arranged on the shell 1 in a penetrating way; a sealing device 3 is also arranged between the shell 1 and the valve rod 2; a motor 4 and a gear reduction mechanism 5 are arranged in the shell 1; the casing 1 is also internally provided with a cam mechanism 6 for driving the valve rod 2 to open and close and a reset elastic piece 7 for providing reset elastic force for the valve rod 2; the motor 4 is in transmission connection with the cam mechanism 6 through the gear reduction mechanism 5.
As shown in fig. 1 and 2, the gas meter pipeline opening and closing control device comprises a casing 1 and a valve seat 8, wherein an air inlet 81, an air outlet 82 and a valve rod port 83 which are mutually communicated are arranged on the valve seat 8, the air outlet 82 and the valve rod port 83 are positioned on the same straight line, and the valve rod port 83 of the valve seat 8 is arranged on the casing 1. The valve stem 2 slidably extends through the housing 1 and through a valve stem port 83 of the valve port seat 8 to the air outlet 82. In order to improve the stability of the valve rod 2 when moving along the axial direction, a sliding groove 11 which is in sliding fit with the valve rod 2 is also arranged in the casing 1. The valve sealing framework 21 is arranged at the end part of the valve rod 2 corresponding to the air outlet 82 of the valve seat 8, and a valve sealing gasket 22 for sealing the air outlet 82 of the valve seat 8 is sleeved on the valve sealing framework 21. The sealing device 3 is arranged between the casing 1 and the valve rod 2, so that sealing is formed for the cavity in the casing 1, and adverse effects on moving parts in the casing 1 caused by the fact that gas impurities in the valve port seat 8 enter the cavity in the casing 1 are avoided. The gas meter pipeline is characterized in that a motor 4, a gear reduction mechanism 5, a cam mechanism 6 and a reset elastic piece 7 are arranged in the casing 1, the motor 4 is in transmission connection with the cam mechanism 6 through the gear reduction mechanism 5, and then the valve rod 2 is driven to move along the axial direction through the cooperation of the cam mechanism 6 and the reset elastic piece 7, so that the gas meter pipeline is opened and closed.
The gear reduction mechanism 5 can be a double-tooth reduction mechanism, and comprises a motor gear arranged on the output shaft of the motor 4, a double-tooth group meshed with the motor gear, and an output gear meshed with the double-tooth group; the double teeth group can be one double teeth or a plurality of double teeth which are mutually meshed and driven. The gear reduction mechanism 5 may also be a planetary gear reduction mechanism or a cycloidal reduction mechanism.
The cam mechanism 6 may provide a driving force for opening or closing the valve stem 2, and the return elastic member 7 provides a return elastic force for returning the valve stem 2, and provides a locking force for the cam mechanism 6. FIG. 1 shows the valve stem 2 in a closed position, with the valve gasket 22 positioned below the outlet 82 of the valve port seat 8 and sealing the outlet 82; at this time, the fuel gas in the valve port seat 8 also generates an upward extrusion force on the valve sealing gasket 22, so that the tightness of the valve sealing gasket is increased; therefore, a smaller driving force is required when the valve stem 2 is closed, and a larger driving force is required when the valve stem 2 is opened.
In order to ensure the stability and reliability of the opening and closing of the whole device, the cam mechanism 6 in the invention provides driving force for opening the valve rod 2, and the reset elastic member 7 provides reset elastic force for closing the valve rod 2. Fig. 2 shows an embodiment of the cam mechanism 6 in the present invention, the cam mechanism 6 is a disc cam mechanism, and the return elastic member 7 is a cylindrical compression spring. The valve rod 2 is also provided with a guide post which extends into the compression spring, so that the stability of the compression spring is improved. The cam mechanism 6 comprises a disc cam 61 arranged in the casing 1 and a roller 62 arranged on the valve rod 2; the outer edge of the disc cam 61 is a curve profile; the roller 62 engages with the curved contour of the cam disk 61. The roller 62 is mounted on the valve stem 2 via a roller shaft, or the roller 62 and the roller shaft may be incorporated into one piece and mounted on the valve stem 2, and the disc cam 61 is disposed coaxially with the output gear of the gear reduction mechanism 5. Further, the disc cam 61 is located between the roller 62 and the sealing device 3 in the direction along the axial direction of the valve stem 2. In order to improve the stress condition of the disc cam 61 and the roller 62, the revolution center line of the disc cam 61, the revolution center line of the roller 62 and the axis of the valve rod 2 are in the same plane. The cam mechanism 6 may also be a moving cam mechanism or a space cam mechanism, and the return elastic member 7 may also be an elastic rope.
The gas meter pipeline opening and closing control device disclosed by the invention has the following working processes: as shown in fig. 2, the device is in a closed state, when the device needs to be opened, the motor 4 is started, the output shaft of the motor 4 drives the motor gear to rotate, and then drives the double-tooth set meshed with the motor gear to rotate, the double-tooth set drives the output gear to rotate, and then the output gear drives the coaxially arranged disc cam 61 to rotate clockwise, and further, the restoring elasticity of the compression spring and the pressure of fuel gas on the valve sealing pad 22 are overcome through locking of the curve profile of the disc cam 61 and the roller 62, so that the valve rod 2 is driven to move downwards, and then the air outlet 82 on the valve port seat 8 is opened, and the communication between the air inlet 81 and the air outlet 82 on the valve port seat 8 is realized. The valve rod 2 moves downwards to the lower limit according to the set movement rule, the motor 1 can be stopped to rotate according to the electric signal given by the position switch or the set time of the motor 1, the disc cam 61 and the roller 62 are in a locking limit state, the valve rod 2 moves downwards, and the device completes the opening action. When the device is started and needs to be closed, as a preferable scheme, the motor 4 is continuously started, the disc cam 61 continuously rotates clockwise, the curve outline of the disc cam 61 and the roller 62 are locked under the action of spring force, the valve rod 2 moves upwards to the upper limit rapidly according to the set motion rule, the motor 1 can be stopped to rotate according to the electric signal given by the position switch or the set time of the motor 1, the disc cam 61 and the roller 62 are in the limit state of locking and the valve rod 2 moves upwards, and the device completes the closing action. When the device is opened and needs to be closed, as an alternative scheme, the motor 4 is reversed, the output shaft of the motor 4 drives the motor gear to be reversed, and then drives the double-tooth set meshed with the motor gear to be reversed, the double-tooth set drives the output gear to be reversed, the output gear drives the coaxially arranged disc cam 61 to rotate anticlockwise, at the moment, the disc cam 61 no longer provides driving force for the roller 62, the compression spring provides reset elastic force for the valve rod 2, the curve profile of the disc cam 61 is locked with the roller 62 under the action of the spring force, the valve rod 2 moves upwards to the upper limit according to the set movement rule, and then the valve sealing gasket 22 seals the air outlet 82 on the valve port seat 8, so that the device completes closing action.
According to the gas meter pipeline opening and closing control device, the cam mechanism 6 and the elastic reset piece 7 are arranged to control the opening and closing action of the valve rod 2, and the valve rod 2 can be opened and closed according to a planned rule only by designing a corresponding curve profile, so that the defect of mechanism locked rotation or moving piece tripping is avoided, and the mechanism is simple and reliable.
As shown in fig. 1, the casing 1 includes a motor rear cover 12, a casing 13 and an end cover 14 from left to right, and the casing 13 has a left-right opening structure; the motor 4 is arranged in a groove of the motor rear cover 12, the motor rear cover 12 is sealed at the left opening of the shell 13, and the end cover 14 is sealed at the right opening of the shell 13, so that a sealed cavity is formed in the shell 1. A mounting frame 15 is arranged in the shell 13, and the mounting frame 15 divides the inner cavity of the shell 13 into a left decelerating chamber and a right driving chamber; the gear reduction mechanism 5 is arranged in a reduction chamber, and the cam mechanism 6 and the reset elastic member 7 are mainly arranged in a driving chamber; the rotation shaft in the gear reduction mechanism 5 and the rotation shaft in the cam mechanism 6 are rotatably mounted on the mounting frame 15. As shown in fig. 1 and 3, the end cover 14 is further provided with a threading hole 16, a motor wire 17 connected with the motor 4 passes through the threading hole 16, and an outgoing line sealing rubber plug 18 is further provided between the threading hole 16 and the motor wire 17, and the outgoing line sealing rubber plug 18 seals between the motor wire 17 and the threading hole 16. In order to facilitate the installation and the disassembly of the valve rod 2, the valve rod 2 comprises a first section and a second section, and the first section and the second section of the valve rod 2 are sleeved inside and outside and form concave-convex matching to ensure reliable connection; the first section of the valve rod 2 slidably penetrates through the casing 1, and the second section of the valve rod 2 is arranged in the casing 1 and is in sliding fit with the sliding groove 11.
The sealing device 3 can adopt a sealing sleeve which is completely sealed in the prior art, but the adaptability of the structure to various pressure environments is poor, the sealing chamber of the casing 1 can generate positive pressure or negative pressure relative to the valve port seat 8 under the action of various factors, the sealing sleeve can be subjected to the positive pressure or negative pressure environment, and the problem that the valve opening and closing performance is influenced due to the bulge or shrinkage of the sealing sleeve easily occurs. Preferably, the sealing device 3 includes a sleeve 31 sleeved on the valve rod 2 and disposed on the casing 1, a sealing ring 32 mounted between an inner wall of the sleeve 31 and the valve rod 2, and a limiting member 33 for axially limiting the sealing ring 32. As shown in fig. 4, the sleeve 31 is cylindrical, is fitted over the valve stem 2, and is provided on the housing 1. In order to form a necessary and sufficient space between the inner peripheral surface of the sleeve 31 and the outer peripheral surface of the valve stem 2 so as to mount the seal ring 32, the inner diameter of the sleeve 31 should be appropriately set according to the outer diameter of the valve stem 2. The seal ring 32 is arranged between the inner peripheral surface of the shaft sleeve 31 and the outer peripheral surface of the valve rod 2 and is in sealing fit with the inner peripheral surface and the outer peripheral surface of the valve rod; the upper and lower sides of the seal ring 32 are limited by a limiting member 33. The seal ring 32 may be made of rubber, polymer material or composite material, and has the advantages of high elasticity, high rebound resilience, proper expansion strength, elongation, tear resistance, etc.
The limiting member 33 may be an annular limiting groove provided on the inner wall of the sleeve 31, and the sealing ring 32 is provided in the annular limiting groove. Fig. 4 shows a preferred embodiment of the limiting member 33, wherein the limiting member 33 comprises a limiting flange 331 located on the motor area side of the sealing ring 32 and disposed on the inner wall of the sleeve 31, and a gland 332 located on the valve seat area side of the sealing ring 32, sleeved on the valve rod 2, and detachably mounted on the sleeve 31. As shown in fig. 4, the motor area side is located below the seal ring 32, and the valve seat area side is located above the seal ring 32. The limit flange 331 is located below the seal ring 32, the limit flange 331 is of an annular structure, and is disposed on the inner peripheral surface of the shaft sleeve 31, and limits the lower end of the seal ring 32, and the limit flange 331 and the shaft sleeve 31 are integrally formed. The gland 332 is located above the sealing ring 32, the gland 332 has an annular flange and an axial protruding part extending towards the space between the shaft sleeve 31 and the valve rod 2, the axial protruding part limits the upper end of the sealing ring 32, the gland 332 can be detachably connected with the shaft sleeve 31 through a bolt structure, and as a preferable scheme, the axial protruding part is connected with the inner hole of the shaft sleeve 31 through interference fit or protruding fit through an annular groove.
In the inspection and use process of the gas meter pipeline opening and closing control device, the pressure difference between the motor area side and the valve port seat area side can be changed continuously, and when the pressure difference between the motor area side and the valve port seat area side exceeds a safety value, the stability and the reliability of the whole device can be reduced, so that the service life of the device is reduced. In order to improve the reliability of the whole device, the sealing device 3 is further provided with a first pressure relief structure for relieving pressure from the motor area side to the valve seat area side and a second pressure relief structure for relieving pressure from the valve seat area side to the motor area side. Through setting up first pressure release structure and second pressure release structure, can automatic pressure release after the pressure differential between gas pressure in casing 1 and valve port seat 8 are inconsistent, other in the valve port seat 8 surpasses the safe value, and then balance the pressure in casing 1 and the valve port seat 8. The pressure on the motor region side of the seal ring 32 is set to be P1, the pressure on the valve seat region side of the seal ring 32 is set to be P2, and the safety value of the pressure difference is set to be P3. When P1-P2 > P3, the pressure of the motor area side is larger than the pressure of the valve seat area side, and the pressure difference between the motor area side and the valve seat area side exceeds a safety value, and at the moment, the motor area side is decompressed to the valve seat area side through the first decompression structure so as to balance the pressure difference between the motor area side and the valve seat area side, and then the P1-P2 is smaller than P3. When P2-P1 > P3, the pressure at the valve seat area side is larger than the pressure at the motor area side, and the pressure difference between the two is larger than a safety value, at the moment, the valve seat area side is decompressed to the motor area side through the second decompression structure so as to balance the pressure difference between the two, and then P2-P1 is smaller than P3.
As shown in fig. 4 and 5, the first pressure relief structure includes a first pressure relief hole 34 formed by an inner hole of the seal ring 32; the second relief structure includes at least one second relief aperture 35 provided in the seal ring 32. The first pressure relief hole 34 includes a first seal lip segment 341 and a first open segment 342 in a direction from the valve seat region side to the motor region side; when the first pressure relief structure is in a sealing state, the first sealing lip section 341 is in sealing fit with the outer peripheral surface of the valve rod 2, and a gap is formed between the first opening section 342 and the outer peripheral surface of the valve rod 2; when the first pressure relief structure is in a pressure relief state, a first pressure relief channel is formed between the first sealing lip segment 341 and the valve stem 2. The second pressure release hole 35 comprises a second lip seal section 351 and a second opening section 352 along the direction from the motor area side to the valve seat area side; when the second pressure relief structure is in a sealed state, the second lip seal section 351 of the second pressure relief hole 35 is in a sealed closed state, and the second open section 352 of the second pressure relief hole 35 is in an open state; when the second pressure relief structure is in a pressure relief state, the second lip seal section 351 of the second pressure relief aperture 35 opens and forms a second pressure relief channel.
In the use, first pressure release structure and second pressure release structure all include two states, are sealed state and pressure release state respectively. When P1-P2 < P3, it indicates that the pressure difference between the motor area side and the valve seat area side is smaller than the safety value, at this time, the first pressure relief structure is in a sealed state, specifically, the first sealing lip section 341 of the first pressure relief hole 34 is in sealing fit with the outer peripheral surface of the valve stem 2, and a gap is provided between the first opening section 342 of the first pressure relief hole 34 and the outer peripheral surface of the valve stem 2. When P1-P2 > P3, the pressure difference between the motor area side and the valve seat area side is larger than the safety value, and the first pressure release structure is in a pressure release state, specifically, a first pressure release channel is formed between the first sealing lip section 341 of the first pressure release hole 34 and the valve rod 2 under the action of gas pressure, the motor area side and the valve seat area side are communicated, the motor area side and the valve seat area side are subjected to pressure release to balance the pressure difference between the motor area side and the valve seat area side, and when P1-P2 < P3, the first pressure release channel is automatically closed, and the first sealing lip section 341 of the first pressure release hole 34 is in sealing fit with the outer peripheral surface of the valve rod 2. Further, the first pressure relief hole 34 is a tapered hole with a small valve seat area side and a large motor area side. When P2-P1 < P3, it indicates that the pressure difference between the valve seat area side and the motor area side is smaller than the safety value, and the second pressure release structure is in a sealed state, specifically, as shown in the second pressure release hole 35 on the left side in fig. 5, the second sealing lip section 351 of the second pressure release hole 35 is in a sealed closed state under the action of the self elastic force of the sealing ring 32, and the second opening section 352 is in an open state. When P2-P1 > P3, it indicates that the pressure difference between the valve seat area side and the motor area side is greater than the safety value, at this time, the second pressure release structure is in a pressure release state, specifically, as shown in the second pressure release hole 35 on the right side in fig. 5, under the action of the gas pressure, the second sealing lip section 351 of the second pressure release hole 35 is opened to form a second pressure release channel, and the valve seat area side and the motor area side are communicated, so that the valve seat area side and the motor area side release pressure to balance the pressure difference therebetween, and when P2-P1 < P3, the second pressure release channel is automatically closed, and the second sealing lip section 351 of the second pressure release hole 35 is sealed and closed. Further, a plurality of second pressure relief holes 35 are uniformly distributed on the circumference of the sealing ring 32, and when the second pressure relief holes 35 are in a pressure relief state, as shown in the second pressure relief holes 35 on the right side in fig. 5, the shape of the second pressure relief holes is generally conical.
The first pressure relief structure may also be a first channel disposed on the shaft sleeve 31 and communicating the motor area side and the valve seat area side, where a first sealing pad is disposed at an opening of the first channel on the valve seat area side, and the first sealing pad seals the opening of the first channel through an elastic structure, and when P1-P2 > P3, under the action of gas pressure, the first sealing pad opens the opening of the first channel, so that the motor area side is relieved from the valve seat area side. When P1-P2 is less than P3, the first sealing gasket is sealed at the opening of the first channel through the elastic structure. The second pressure relief structure may also be a second channel disposed on the shaft sleeve 31 and communicating the motor area side and the valve seat area side, where a second sealing pad is disposed at an opening of the second channel located at the motor area side, and the second sealing pad seals the opening of the second channel through an elastic structure, and when P2-P1 > P3, the second sealing pad opens the opening of the second channel under the action of gas pressure, so that the valve seat area side is relieved from the motor area side. When P2-P1 is less than P3, the second sealing gasket is sealed at the opening of the second channel through the elastic structure.
Claims (6)
1. The gas meter pipeline opening and closing control device comprises a shell (1), wherein a valve rod (2) is arranged on the shell (1) in a penetrating way; a sealing device (3) is arranged between the shell (1) and the valve rod (2); a motor (4) and a gear reduction mechanism (5) are arranged in the shell (1); the valve is characterized in that a cam mechanism (6) for driving the valve rod (2) to open and close and a reset elastic piece (7) for providing reset elastic force for the valve rod (2) are also arranged in the shell (1); the motor (4) is in transmission connection with the cam mechanism (6) through the gear reduction mechanism (5); the cam mechanism (6) comprises a disc cam (61) arranged in the shell (1) and a roller (62) arranged on the valve rod (2); the outer edge of the disc cam (61) is a curve outline; the roller (62) is locked with the curve contour of the cam disc (61); the sealing device (3) comprises a shaft sleeve (31) sleeved on the valve rod (2) and arranged on the machine shell (1), a sealing ring (32) arranged between the inner wall of the shaft sleeve (31) and the valve rod (2), and a limiting piece (33) for axially limiting the sealing ring (32); the sealing device (3) is also provided with a first pressure relief structure for relieving pressure from the motor area side to the valve seat area side and a second pressure relief structure for relieving pressure from the valve seat area side to the motor area side, and the first pressure relief structure comprises a first pressure relief hole (34) formed by an inner hole of a sealing ring (32); the second pressure relief structure comprises at least one second pressure relief hole (35) arranged on the sealing ring (32); the first pressure relief hole (34) comprises a first sealing lip section (341) and a first opening section (342) along the direction from the valve seat area side to the motor area side; when the first pressure relief structure is in a sealing state, the first sealing lip section (341) is in sealing fit with the outer peripheral surface of the valve rod (2), and a gap is reserved between the first opening section (342) and the outer peripheral surface of the valve rod (2); when the first pressure relief structure is in a pressure relief state, a first pressure relief channel is formed between the first sealing lip section (341) and the valve rod (2); the second pressure relief hole (35) comprises a second lip sealing section (351) and a second opening section (352) along the direction from the motor area side to the valve seat area side; when the second pressure relief structure is in a sealing state, a second lip sealing section (351) of the second pressure relief hole (35) is in a sealing closed state, and a second opening section (352) of the second pressure relief hole (35) is in an opening state; when the second pressure relief structure is in a pressure relief state, a second lip seal section (351) of the second pressure relief hole (35) is opened and forms a second pressure relief channel.
2. A gas meter pipe opening and closing control device according to claim 1, characterized in that the disc cam (61) is located between the roller (62) and the sealing means (3) in the direction along the axial direction of the valve stem (2).
3. The gas meter pipeline opening and closing control device according to claim 2, characterized in that the return elastic member (7) is a columnar compression spring.
4. A gas meter pipe opening and closing control device according to claim 2 or 3, characterized in that the revolution center line of the disc cam (61), the revolution center line of the roller (62) and the axis of the valve stem (2) are in the same plane.
5. The gas meter pipeline opening and closing control device according to claim 1, wherein the limiting member (33) comprises a limiting flange (331) located on the motor area side of the sealing ring (32) and arranged on the inner wall of the shaft sleeve (31), and a gland (332) located on the valve seat area side of the sealing ring (32), sleeved on the valve rod (2) and detachably mounted on the shaft sleeve (31).
6. A gas meter pipeline opening and closing control device according to claim 1, 2 or 3, characterized in that a chute (11) in sliding fit with the valve rod (2) is also arranged in the casing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066041.3A CN109538808B (en) | 2019-01-24 | 2019-01-24 | Gas meter pipeline opening and closing control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066041.3A CN109538808B (en) | 2019-01-24 | 2019-01-24 | Gas meter pipeline opening and closing control device |
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| Publication Number | Publication Date |
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| CN109538808A CN109538808A (en) | 2019-03-29 |
| CN109538808B true CN109538808B (en) | 2024-03-26 |
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| CN201910066041.3A Active CN109538808B (en) | 2019-01-24 | 2019-01-24 | Gas meter pipeline opening and closing control device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000346238A (en) * | 1999-06-02 | 2000-12-15 | Tokyo Electron Ltd | Valve |
| CN101421547A (en) * | 2006-02-27 | 2009-04-29 | 特瑞堡密封系统德国有限公司 | Sealing system with pressure relief elements and use of a sealing system for producing a pressure cascade in an intermediate space |
| CN202611935U (en) * | 2012-06-01 | 2012-12-19 | 潍坊威度电子科技有限公司 | Electric EGR valve |
| CN106195283A (en) * | 2016-08-30 | 2016-12-07 | 成都秦川科技发展有限公司 | Small low-voltage damage type two-way gear drive without stall electromechanical valve and gas meter, flow meter |
| CN107345595A (en) * | 2017-09-08 | 2017-11-14 | 宁波万诺宝通机电制造有限公司 | Quick closing valve motor valve built in a kind of intelligent gas meter |
| EP3271623A1 (en) * | 2015-03-19 | 2018-01-24 | GEA Tuchenhagen GmbH | Lifting valve having a rotational decoupling device |
| CN209587281U (en) * | 2019-01-24 | 2019-11-05 | 成都通冠信科技有限公司 | Gas combustion meter pipe opening/shutting controller |
-
2019
- 2019-01-24 CN CN201910066041.3A patent/CN109538808B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000346238A (en) * | 1999-06-02 | 2000-12-15 | Tokyo Electron Ltd | Valve |
| CN101421547A (en) * | 2006-02-27 | 2009-04-29 | 特瑞堡密封系统德国有限公司 | Sealing system with pressure relief elements and use of a sealing system for producing a pressure cascade in an intermediate space |
| CN202611935U (en) * | 2012-06-01 | 2012-12-19 | 潍坊威度电子科技有限公司 | Electric EGR valve |
| EP3271623A1 (en) * | 2015-03-19 | 2018-01-24 | GEA Tuchenhagen GmbH | Lifting valve having a rotational decoupling device |
| CN106195283A (en) * | 2016-08-30 | 2016-12-07 | 成都秦川科技发展有限公司 | Small low-voltage damage type two-way gear drive without stall electromechanical valve and gas meter, flow meter |
| CN107345595A (en) * | 2017-09-08 | 2017-11-14 | 宁波万诺宝通机电制造有限公司 | Quick closing valve motor valve built in a kind of intelligent gas meter |
| CN209587281U (en) * | 2019-01-24 | 2019-11-05 | 成都通冠信科技有限公司 | Gas combustion meter pipe opening/shutting controller |
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|---|---|
| CN109538808A (en) | 2019-03-29 |
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