CN111219509B - Modular mechanical pipeline gas self-closing valve - Google Patents
Modular mechanical pipeline gas self-closing valve Download PDFInfo
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- CN111219509B CN111219509B CN202010126935.XA CN202010126935A CN111219509B CN 111219509 B CN111219509 B CN 111219509B CN 202010126935 A CN202010126935 A CN 202010126935A CN 111219509 B CN111219509 B CN 111219509B
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- 230000007246 mechanism Effects 0.000 claims abstract description 52
- 239000012528 membrane Substances 0.000 claims abstract description 27
- 239000010985 leather Substances 0.000 claims abstract description 19
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 81
- 210000004907 gland Anatomy 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 15
- 230000002265 prevention Effects 0.000 claims description 9
- 239000002737 fuel gas Substances 0.000 claims description 5
- 238000005056 compaction Methods 0.000 claims 1
- 230000003068 static effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
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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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The utility model provides a modular mechanical pipeline gas self-closing valve, has the setting at the control cavity that is connected, link up each other with manual ball valve end of giving vent to anger, and the port of giving vent to anger of control cavity is provided with external screw connection gas hose. The automatic control mechanism is formed by an automatic opening mechanism, a manual pulling adjusting mechanism and an air inlet control valve starting mechanism, an air inlet control valve is arranged in an air channel between the ball valve cavity and the control cavity, the air inlet control valve penetrates through an air outlet of the ball valve cavity and an air inlet of the control cavity, the air inlet control valve starting mechanism corresponds to the air inlet control valve, and the air inlet control valve starting mechanism is in penetrating connection with a leather membrane, a pull rod, a limiting pull button and an inner pull button which are arranged at an upper port of the control cavity, and is manually conducted with an air source, so that the automatic control mechanism is in a standby state.
Description
Technical Field
The invention relates to a modular mechanical pipeline gas safety valve. In particular to a modular mechanical pipeline gas self-closing valve.
Background
In order to solve the problem of environmental pollution, clean energy is widely popularized at present, industrial and agricultural and civil fuel are widely popularized to carry out coal-to-gas engineering, because combustible gas is inflammable and explosive gas, the government makes relevant regulations, standards and precautions for guaranteeing gas safety of gas users, and engineering technicians in the industry propose different technical schemes.
In order to prevent the problem of gas leakage, the gas self-closing valve on the market at present basically adopts a permanent magnet as the power of automatic control, highlights the constant suction force of the permanent magnet in practical application, limits the application range of working conditions, automatically cuts off a gas source when the gas pressure drops to a critical point during gas utilization peak, causes the illusion of general gas interruption, causes most of unchanged gas users and gas companies, and inevitably faces elimination because the design is not suitable for the change of the working conditions. In order to solve this problem, the design scheme is changed according to the practical conditions.
The Chinese patent ZL2015207576467.9 discloses a pipeline gas self-closing valve, wherein a leather membrane is arranged at the upper port of a gas storage bin of a main valve body, the leather membrane expands or retracts along with the change of the air pressure in the gas storage bin to drive a shifting block arranged in the gas storage bin to move up and down, a valve plate in the main valve body is controlled to axially move, the valve plate is kept in an open state when the air pressure is balanced, the air source can be automatically cut off when the pressure is smaller than a standard state, and the valve plate can automatically cut off the air source when the leather membrane retracts to the lowest when the flow is overlarge. When the automatic gas storage bin is used for aging, the shifting block arranged in the gas storage bin is limited by the overturning angle, the gas source cannot be automatically closed when the gas storage bin is overpressured, and the related standard requirements cannot be met due to the lack of the overpressure automatic closing function. Another patent ZL201720173658.1 discloses a self-closing valve for pipeline gas, a sleeve is arranged in the center of the main valve body gas storage bin, two ends of the sleeve are connected with guide walls, and guide holes are arranged on the guide walls. The guide hole is crossed and communicated with the sleeve and the sleeve of the main valve body, a normally open valve plate is arranged in an air outlet channel of the air inlet end of the main valve body, a guide shaft of the normally open valve plate penetrates through the guide hole to enter the sleeve, the normally closed valve plate is arranged at a port of the air outlet channel of the main valve body, and a guide shaft of the normally closed valve plate penetrates through the guide hole to enter the sleeve. The normally closed valve plate and the normally open valve plate are controlled by a tapered pull rod arranged in the sleeve, when the pull rod is pulled upwards, the tapered surface of the pull rod pushes the normally closed valve plate to conduct the gas channel, and a leather membrane arranged at the upper port of the main valve body is expanded by the gas pressure to keep the normally closed valve plate to conduct the gas source under the normal working condition. When the air pressure in the main valve body air storage bin is smaller than rated pressure, the leather film at the upper port of the main valve body is retracted to drive the pull rod to synchronously fall back to be separated from the normally closed valve plate to close the air source.
When the air flow is larger than the rated range, the leather film is retracted to drive the pull rod to synchronously fall back to be separated from the normally closed valve plate to close the air source. When the air pressure in the air storage bin is greater than rated pressure, the leather diaphragm continues to expand to drive the pull rod to continuously ascend to push the long-opening valve plate to close the air outlet channel, so that the pipeline gas self-closing valve can automatically close the air source when in overpressure, underpressure and overcurrent. The normally closed valve plate is still in an open state after the overpressure is closed, so that gas still exists in the gas storage bin, and the gas source cannot be completely closed. Another design solution is therefore required to address the disadvantages. Still another patent of the utility model ZL201821645121.1 provides a mechanical pipeline gas self-closing valve, a central control bracket is arranged in the center of a main valve body gas storage bin, a starting bracket is arranged in the central control bracket, a jack is arranged in the starting bracket, the top end of the starting bracket is linked with a pull rod, the pull rod is controlled by a port leather film on a main valve body, and an air inlet control valve plate is arranged in a gas channel of the main valve body gas storage bin and a ball valve. Lifting the pull rod upwards starts a jack in the bracket to open the air inlet control valve plate to conduct an air source, and the leather diaphragm expands to keep the air inlet control valve plate open for ventilation. When the air pressure in the air storage bin is smaller than the standard, the leather film is retracted to drive the starting support to descend the jack to be separated from the air inlet control valve plate to close the air source. When the air pressure in the air storage bin is greater than the standard, the leather diaphragm continues to expand to drive the starting support to continuously rise so that the jack is separated from the air inlet control valve plate to close the air source, the non-pressure leather diaphragm of the air storage bin is retracted and restored to a static state, and when the air flow is greater than the rated range, the leather diaphragm is retracted to drive the pull rod to synchronously fall back to be separated from the normally closed valve plate to close the air source, so that the effective functions of automatically closing the air source by overpressure, underpressure and overcurrent are realized. Although the design solves some defects of a plurality of gas pipeline self-closing valves, because the structure and the process are complex, the pull rod is in threaded connection with the starting support, the port leather membrane is made of elastic materials and is in sealing connection with the pull rod, the pull rod deflects to drive the starting support to deflect in the guiding support, so that interference is generated between the starting support and the guiding support, the gas pressure is low and is only 1-3 KPa, and therefore, the non-interference flexibility of the up-and-down movement of the starting support cannot be ensured. Therefore, there is still a need to design a reliable pipeline gas self-closing valve through further improvement. Since governments place importance on the safety of fuel gas and related regulations and precautions, various solutions have been proposed by those skilled in the art.
Disclosure of Invention
The invention aims to solve the technical problem of providing the modular mechanical pipeline gas self-closing valve which has complete functions, is simple and modular, is safer, more reliable and more durable, and is connected with a gas ball valve into a whole.
The technical scheme adopted by the invention is as follows: the utility model provides a modular mechanical pipeline gas self-closing valve comprises ball valve switch and have superpressure, undervoltage and overflow leak protection gas automatic control device, wherein, ball valve switch include: the ball valve comprises a ball valve cavity with two communicated air inlets and air outlets respectively formed at two sides, a ball switch arranged in the ball valve cavity, a manual knob mechanism arranged at the top end of the ball valve cavity and connected with the ball switch and used for switching on or off the ball valve cavity by manually controlling the ball switch to rotate, and an air inlet threaded interface connected with the air inlet of the ball valve cavity, an air inlet control valve used for opening or closing the air outlet under the control of an air leakage prevention automatic control device arranged at the air outlet side of the ball valve cavity and comprising a control cavity with an air inlet end integrally connected with the air outlet side of the ball valve cavity, and an air outlet thread used for connecting an external gas hose formed at the air outlet end of the control cavity, the utility model discloses a control cavity, including control cavity, the last port of control cavity is provided with the involucra that is used for sealing the control cavity and can upwards bulge or collapse under the gas drive in the control cavity to and be used for fixed involucra's convex upper cover, the center of involucra runs through from top to bottom is provided with the pull rod, the lower extreme of pull rod is located in the control cavity, the upper end of pull rod runs through the convex upper cover and connects and be used for manual pulling pull rod to shift up and can adjust the manual pulling adjustment mechanism of pull rod degree of shifting up, the control cavity in fixedly be provided with well accuse support, be provided with in the well accuse support and can be through the drive in the follow well accuse support the inlet control valve actuating mechanism of the gas outlet of ball valve cavity of opening or closing, inlet control valve actuating mechanism's top swing joint is in the lower extreme of pull rod.
The invention relates to a modular mechanical pipeline gas self-closing valve, which integrates a scattered automatic control mechanism into two modules, the two modules are combined into a mutually-closed automatic control mechanism, each part is mutually associated, the production and assembly processes are simplified, and the automatic closing action is sensitive, reliable and accurate, so that the valve is safer and more reliable. The present invention has the following advantages.
1. The invention sets the control cavity at the air outlet end of the common ball valve, sets the modular automatic control mechanism with overpressure, undervoltage and overcurrent in the control cavity, effectively solves the problem of various leaked fuel gas, especially when the air supply is stopped due to pipeline maintenance or various reasons, the air source can be automatically closed, and the problem of disaster accidents caused by the fuel gas leakage of the fuel gas valve which is not closed when the air supply is recovered is prevented.
2. The manual ball valve and the automatic control device are respectively arranged on the ball valve cavity and the control cavity, and are mutually related due to the integrated structure of the ball valve and the control cavity, so that the hidden trouble of multipoint connection on a gas pipeline is eliminated, and the manual ball valve and the automatic control device are safer and more reliable.
3. Because the pull rod is non-rigid connection with the starting support, when the pull rod is deviated, the starting support can automatically adjust the center position, thereby avoiding interference between the starting support and the guiding support and enabling the starting support to always keep non-interference movement in the guiding support.
Drawings
FIG. 1 is a schematic illustration of the external structure of a modular mechanical duct gas self-closing valve of the present invention;
FIG. 2 is a schematic illustration of the internal structure of a modular mechanical pipeline gas self-closing valve of the present invention;
FIG. 3 is a schematic illustration of an exploded construction of a modular mechanical duct gas self-closing valve of the present invention;
FIG. 4 is a top view of the ball valve portion and control chamber portion of the present invention;
FIG. 5 is a cross-sectional view of section A-A of FIG. 4;
FIG. 6 is a schematic structural view of a center control bracket according to the present invention;
FIG. 7 is a schematic view of the structure of the connection of the central control bracket and the air inlet control valve in the invention;
Fig. 8 is a schematic view of the structure of a pi-shaped frame of the inlet control valve actuating mechanism of the present invention;
fig. 9 is a schematic diagram of the connection of the pi-shaped frame and the jack of the air inlet control valve starting mechanism in the invention;
FIG. 10 is a schematic view of the structure of the jack of the present invention;
FIG. 11 is a schematic view of the structure of the tie rod of the present invention;
Fig. 12 is a schematic view of the structure of the adjusting gland in the present invention.
In the figure
1: Ball valve cavity 2: sphere switch
3: Air intake screw interface 4: manual knob mechanism
5: Intake control valve 6: control cavity
7: Air outlet nozzle screw thread 8: central control bracket
8.1: Bottom plate 8.2: supporting plate
8.3: Guide post 8.4: guide hole
8.5: U-shaped plate 8.6: guide groove
8.7: Lug 8.8: through hole
9: Air outlet 10: inlet control valve actuating mechanism
10.1: Pi shaped frame 10.2: u-shaped groove
10.3: Through hole 10.4: cross beam
11: Pull rod 11.1: main rod body
11.2: Sealing disk 11.3: external screw thread
11.4: Connection groove 12: touch shaft
13: Coating 14: circular arc upper cover
15: Control spring 16: shaft snap spring
17: Support boss 18: screw hole
19: Jack 19.1: arc end face
19.2: Opening 19.3: shaft hole
20: Jack shaft 21: torsion spring
22: Tray 23: screw cap
24: Upper spring 25: adjusting gland
25.1: Lower adjustment gland 25.2: upper connecting cylinder
25.3: Limit convex edge 26: limiting pull button
26.1: Hook 27: inner pull button
Detailed Description
The following describes a modular mechanical pipeline gas self-closing valve according to the present invention in detail with reference to the examples and the accompanying drawings.
As shown in fig. 1,2 and 3, the invention relates to a modular mechanical pipeline gas self-closing valve, which consists of a ball valve switch and an automatic gas leakage prevention control device with overpressure, undervoltage and overcurrent, wherein the ball valve switch comprises: the ball valve comprises a ball valve cavity 1 with two communicated air inlets and air outlets, a ball switch 2 arranged in the ball valve cavity 1, a manual knob mechanism 4 arranged at the top end of the ball valve cavity 1 and connected with the ball switch 2, and used for conducting or closing the ball valve cavity 1 by manually controlling the rotation of the ball switch 2, and an air inlet threaded connector 3 connected with the air inlet of the ball valve cavity 1, an air inlet control valve 5 arranged at the air outlet 9 of the ball valve cavity 1 and used for opening or closing the air outlet 9 under the control of an air leakage prevention automatic control device, the air leakage prevention automatic control device arranged at the air outlet side of the ball valve cavity 1, a control cavity 6 with an air inlet end integrally connected with the air outlet end of the ball valve cavity 1, an air outlet thread 7 used for connecting an external gas hose, an upper port of the control cavity 6 provided with a membrane 13 used for closing the control cavity 6 and capable of rising or collapsing upwards under the gas drive of the control cavity 6, an upper membrane 13 used for fixing the membrane 13, a lower membrane 13 arranged in the control cavity 8 and a lower membrane 11 which is used for driving the membrane 11 to move in the control cavity 8 and is provided with a support frame 11 which is arranged in the control cavity 8 and is capable of moving along the upper membrane 11, and a lower membrane 11 is fixed in the control valve support frame 11 which is provided with a manual membrane opening mechanism which is used for opening the upper membrane 11 and is fixed in the control valve 8, and is arranged in the upper support frame 11 which is capable of being opened and is provided with a lower membrane frame 11 which is used for opening and is fixed in the control valve 11, the top end of the air inlet control valve starting mechanism 10 is movably connected to the lower end of the pull rod 11.
As shown in fig. 6 and 7, the central control bracket 8 includes a bottom plate 8.1, one end of the bottom plate 8.1 is integrally formed with a vertically arranged support plate 8.2, a guide post 8.3 is disposed on the support plate 8.2, a guide hole 8.4 capable of penetrating through the touch shaft 12 on the air inlet control valve 5 to guide the movement of the touch shaft 12 is axially formed in the center of the guide post 8.3, a circle of groove formed at the front end of the touch shaft 12 is sleeved with a control spring 15 when the front end of the touch shaft 12 passes through the guide hole 8.4, as shown in fig. 2 and 6, a shaft clamp spring 16 is mounted in the groove at the front end of the touch shaft 12 to limit the air inlet control valve 5 from falling out of the guide hole 8.4, and one end of the control spring 15 acts on the guide post 8.3 and the other end acts on the shaft clamp spring 16. The rubber valve plate of the air inlet control valve 5 is blocked at the air outlet 9 of the ball valve cavity 1, and a normally closed switch for blocking the air outlet 9 is formed under the action of a control spring 15. The bottom plate 8.1 is integrally provided with a guide groove 8.6 which is formed by symmetrically arranging two U-shaped plates 8.5 corresponding to the guide post 8.3, the guide groove 8.6 is internally provided with the air inlet control valve starting mechanism 10 and guides the vertical movement of the air inlet control valve starting mechanism 10, so that the air inlet control valve starting mechanism 10 can move up and down in the guide groove 8.6 without interference.
Lugs 8.7 for fixedly connecting with supporting bosses 17 formed in the control cavity 6 as shown in fig. 4 and 5 are respectively arranged on the outer side surfaces of the two U-shaped plates 8.5, and through holes 8.8 for connecting with screw holes 18 on the supporting bosses 17 through bolts are formed on the lugs 8.7.
As shown in fig. 8 and 9, the air intake control valve starting mechanism 10 includes a n-shaped frame 10.1, a U-shaped groove 10.2 for connecting the lower end of the pull rod 11 is formed on a horizontal plate at the top of the n-shaped frame 10.1, through holes 10.3 are correspondingly formed on two vertical plates of the n-shaped frame 10.1, the two vertical plates of the n-shaped frame 10.1 are connected at the lower part of one side far away from the through holes 10.3 through a cross beam 10.4, and a jack 19 for touching a touch shaft 12 on the air intake control valve 5 is arranged in the n-shaped frame 10.1 through a jack shaft 20 penetrating through the through holes 10.3 on the two vertical plates.
As shown in fig. 9 and 10, the jack 19 is in a pi-shaped strip structure, one end of the pi-shaped strip is formed with an arc end face 19.1 for touching the touch shaft 12 on the air inlet control valve 5, the other end of the pi-shaped strip is provided with an opening 19.2, two side faces of the pi-shaped strip are correspondingly provided with shaft holes 19.3 near the opening 19.2, the jack shaft 20 penetrates through the two ends of the shaft holes 19.3 and is respectively inserted into through holes 10.3 at two sides of the pi-shaped frame 10.1, a torsion spring 21 is sleeved on the jack shaft 20 at the inner side of the jack 19, one end of the torsion spring 21 is respectively arranged on the inner top face of the jack 19, the other end of the torsion spring is respectively arranged on the cross beam 10.4, and the arc end face 19.1 of the jack 19 is arranged opposite to the touch shaft 12 on the air inlet control valve 5 supported on the central control bracket 8.
As shown in fig. 11, the device comprises a main rod body 11.1, a sealing disc 11.2 for sealing contact with the membrane 13 is integrally formed at the position close to the lower end of the main rod body 11.1, an external thread 11.3 for connecting with a manual pulling-up adjusting mechanism is formed on the main rod body 11.1 positioned at the upper part of the sealing disc 11.2, and a circle of connecting groove 11.4 for movably connecting with a U-shaped groove 10.2 at the upper end of the air inlet control valve starting mechanism 10 is formed on the main rod body 11.1 positioned at the lower part of the sealing disc 11.2.
As shown in fig. 2 and 3, a tray 22 for sealing a gap between the film 13 and the tie rod 11 is fitted over the tie rod 11 at an upper end surface of the film 13, and is compressed by a nut 23 screwed to the tie rod 11. The upper and lower parts of the middle through hole of the leather membrane 8 and the pull rod 11 form a sealing state, so that the leather membrane 8 drives the pull rod 11 to move up and down when the air pressure in the control cavity 6 expands or contracts, the pull rod 11 moves up and down and drives the air inlet control valve starting mechanism 10 to move up and down, and the jack 19 touches the touch shaft 12 on the air inlet control valve 5 in the moving process, so that the air inlet control valve 5 opens or closes the air outlet 9 of the ball valve cavity 1.
As shown in fig. 2, 3 and 12, the manual pull-up adjustment mechanism includes: the lower part is connected with the inner side of the top opening of the circular arc-shaped upper cover 14, the upper part is connected with the adjusting gland 25 at the inner side of the limit pull button 26 which is vertically penetrated, the vertical part at the lower part is inserted into the inner side of the upper part of the adjusting gland 25 and is connected with the inner pull button 27 at the upper part of the pull rod 11 through internal threads, the horizontal part at the upper part of the inner pull button 27 is lapped at the upper port of the limit pull button 26, when the limit pull button 26 is manually pulled upwards, the inner pull button 27 is driven to move upwards, and meanwhile, the inner pull button 27 drives the air inlet control valve starting mechanism 10 to move upwards through the connected pull rod 11, so that the jack 19 touches the touch shaft 12 on the air inlet control valve 5, and the air outlet 9 of the ball valve cavity 1 is opened to conduct an air source, so as to form a manual switching mechanism.
The pull rod 11 is also sleeved with an upper spring 24, the upper end of the upper spring 24 is propped in a lower adjusting gland 25.1 of the adjusting gland 25, and the lower end is propped on the tray 22.
The adjusting gland 25 is a lower adjusting gland 25.1 which is provided with external threads and is in threaded connection with the internal threads of the top opening of the circular arc-shaped upper cover 14, the lower adjusting gland 25.1 is integrally connected with the upper end of the lower adjusting gland 25.1, the diameter of the lower adjusting gland is smaller than that of the lower adjusting gland 25.1, an upper connecting cylinder 25.2 with a step is formed at the joint of the lower adjusting gland 25.1, a circle of outwards protruding limit convex edge 25.3 is formed at the upper port of the upper connecting cylinder 25.2, a plurality of hooks 26.1 are formed at the lower periphery of the inner side of the limit pull button 26, and when the limit pull button 26 moves upwards for a set distance along the outer side of the upper connecting cylinder 25.2, the limit convex edge 25.3 is directly hooked with the hooks 26.1, so that the limit pull button 26 is prevented from continuously moving upwards and cannot be separated from the upper connecting cylinder 25.2.
As shown in fig. 2 and 7, the working principle of the modular mechanical pipeline gas self-closing valve of the invention is that after a ball switch 2 is opened through a manual knob mechanism 4, gas entering a ball valve cavity 1 is sealed in a gas outlet 9 by an air inlet control valve 5, at the moment, a limit pull button 26 is pulled upwards to drive an inner pull button 27, a pull rod 11 and an air inlet control valve starting mechanism 10 to synchronously rise, an upper spring 24 is retracted, when a jack 19 in the air inlet control valve starting mechanism 10 touches a touch shaft 12 on the air inlet control valve 5, the end of the touch shaft 12 moves horizontally along the track of an arc end surface 19.1 at the front end of the jack 19, the air inlet control valve 5 moves to the side of the ball valve cavity 1, the gas outlet 9 is opened, the gas enters the control cavity 6, a membrane 13 is retracted by expanding an upper spring 24 due to the action of gas pressure, the membrane 13 and the upper spring 24 act to keep the gas pressure in the control cavity 6 balanced within a standard range, and keep ventilation in a safe and abstinence state.
When the pressure is smaller than the standard range, the film 13 is retracted, the upper spring 24 is opened to press the air inlet control valve starting mechanism 10, the pull rod 11 and the inner pull button 27 to move downwards, the jack 19 is separated from the touch shaft 12 on the air control valve 5, the control spring 15 on the touch shaft 12 stretches to enable the air control valve 5 to move towards the control cavity 6 to block the air outlet 9, and the air source is closed. The automatic control device for preventing air leakage is restored to a static state after the air source is closed.
When the total output gas flow is greater than the rated flow, the coating 13 is retracted, the upper spring 24 is opened to enable the pull rod 11 to drive the inner pull button 27 and the air inlet control valve starting mechanism 10 to synchronously move downwards, the jack 19 in the air inlet control valve starting mechanism 10 is separated from the touch shaft 12 on the air control valve 5, the control spring 15 on the touch shaft 12 stretches to enable the air control valve 5 to move towards the control cavity 6 to block the air outlet 9, and the air source is closed. The automatic control device for preventing air leakage is restored to a static state after the air source is closed.
When the gas pressure in the control cavity 6 is greater than the standard range, the membrane 13 continues to expand, the upper spring 24 is retracted again to drive the inner pull button 27, the pull rod 11 and the air inlet control valve starting mechanism 10 to synchronously move upwards, the jack 19 in the air inlet control valve starting mechanism 10 is separated from the touch shaft 12 on the gas control valve 5, the control spring 15 on the touch shaft 12 stretches to enable the gas control valve 5 to move towards the control cavity 6 to block the gas outlet 9, and the pressure loss in the cavity 6 is controlled. The leather membrane 13 is retracted, the upper spring 24 is opened to enable the pull rod 11 to drive the inner pull button 27 and the air inlet control valve starting mechanism 10 to synchronously move downwards, the lower end face of the jack 19 touches and is separated from the touch shaft 12 to rotate clockwise to be abutted on the cross beam 10.4 in the air inlet control valve starting mechanism 10, and the air leakage prevention automatic control device is restored to a static state after an air source is closed.
As can be seen from the above, the modular mechanical pipeline gas self-closing valve can enable the gas leakage prevention automatic control device to return to a static state of closing the gas source under the condition that the gas source is conducted under normal working conditions.
The specific examples described herein are intended to be illustrative only and various modifications or additions may be made to the described specific examples by those skilled in the art without departing from the spirit of the invention or the scope of the appended claims.
Claims (6)
1. The utility model provides a modular mechanical pipeline gas self-closing valve comprises ball valve switch and have superpressure, undervoltage and overflow leak protection gas automatic control device, wherein, ball valve switch include: the two sides of the ball valve cavity (1) are respectively provided with a through air inlet and a through air outlet, a ball switch (2) is arranged in the ball valve cavity (1), the ball switch (2) is arranged at the top end of the ball valve cavity (1) and is connected with the ball switch (2), a manual knob mechanism (4) for conducting or closing the ball valve cavity (1) through manually controlling the rotation of the ball switch (2), and an air inlet threaded connector (3) connected with the air inlet of the ball valve cavity (1), an air inlet control valve (5) for opening or closing the air outlet (9) under the control of an air leakage prevention automatic control device is arranged at the air outlet (9) of the ball valve cavity (1), the air leakage prevention automatic control device is arranged at the air outlet side of the ball valve cavity (1), the air leakage prevention automatic control device comprises a control cavity (6) with an air inlet end integrally connected with the air outlet side of the ball valve cavity (1), an air outlet thread (7) for connecting an external hose, an upper port of the control cavity (6) is provided with an air outlet thread (7) for sealing the control cavity (6) and can drive a diaphragm (13) in a downward-shaped diaphragm (13) and a downward-shaped diaphragm (13) is arranged at the upper end of the diaphragm (13) and a downward-shaped diaphragm (13) is fixed at the upper diaphragm (13), the lower end of the pull rod (11) is positioned in the control cavity (6), the upper end of the pull rod (11) penetrates through the circular arc-shaped upper cover (14) and is connected with a manual pulling-up adjusting mechanism for manually pulling the pull rod (11) upwards and adjusting the upward moving degree of the pull rod (11), a central control bracket (8) is fixedly arranged in the control cavity (6), an air inlet control valve starting mechanism (10) capable of driving the air inlet control valve (5) to open or close an air outlet (9) of the ball valve cavity (1) through moving up and down along the central control bracket (8) is arranged in the central control bracket (8), and the top end of the air inlet control valve starting mechanism (10) is movably connected with the lower end of the pull rod (11);
The central control bracket (8) comprises a bottom plate (8.1), one end of the bottom plate (8.1) is integrally provided with a vertically arranged supporting plate (8.2), the supporting plate (8.2) is provided with a guide post (8.3), the center axial of the guide post (8.3) is provided with a guide hole (8.4) which can penetrate through a touch shaft (12) on the air inlet control valve (5) and is used for guiding the movement of the touch shaft (12), the bottom plate (8.1) is integrally provided with a guide groove (8.6) which is formed by symmetrically arranging two U-shaped plates (8.5), and the guide groove (8.6) is internally provided with the air inlet control valve starting mechanism (10) and guides the vertical movement of the air inlet control valve starting mechanism (10); lugs (8.7) which are used for being fixedly connected with supporting bosses (17) formed in the control cavity (6) are respectively arranged on the outer side surfaces of the two U-shaped plates (8.5), and through holes (8.8) which are used for being connected with screw holes (18) on the supporting bosses (17) through bolts are formed on the lugs (8.7);
The air inlet control valve starting mechanism (10) comprises a pi-shaped frame (10.1), a U-shaped groove (10.2) used for connecting the lower end of the pull rod (11) is formed on a horizontal plate at the top of the pi-shaped frame (10.1), through holes (10.3) are correspondingly formed on two vertical plates of the pi-shaped frame (10.1), the two vertical plates of the pi-shaped frame (10.1) are connected at the lower part of one side far away from the through holes (10.3) through a cross beam (10.4), and a jack (19) used for touching a touch shaft (12) on the air inlet control valve (5) is arranged in the pi-shaped frame (10.1) through a jack shaft (20) penetrating through the through holes (10.3) on the two vertical plates; the pull rod (11) comprises a main rod body (11.1), a sealing disc (11.2) used for being in sealing contact with the leather membrane (13) is integrally formed at the position close to the lower end of the main rod body (11.1), an external thread (11.3) used for being connected with a manual pulling-up adjusting mechanism is formed on the main rod body (11.1) positioned at the upper part of the sealing disc (11.2), and a circle of connecting groove (11.4) used for being movably connected with a U-shaped groove (10.2) at the upper end of the air inlet control valve starting mechanism (10) is formed on the main rod body (11.1) positioned at the lower part of the sealing disc (11.2).
2. The modular mechanical pipeline gas self-closing valve according to claim 1, wherein the jack (19) is of a n-shaped strip structure, one end of the n-shaped strip is provided with an arc-shaped end face (19.1) for touching a touch shaft (12) on the gas inlet control valve (5), the other end of the n-shaped strip is provided with an opening (19.2), two side faces of the n-shaped strip are provided with shaft holes (19.3) at positions adjacent to the opening (19.2), the jack shaft (20) penetrates through the two ends of the shaft holes (19.3) and is respectively inserted into through holes (10.3) at two sides of the n-shaped frame (10.1), the jack shaft (20) positioned at the inner side of the jack (19) is sleeved with a torsion spring (21), one end of the torsion spring (21) is respectively arranged on the inner top face of the jack (19), the other end of the torsion spring is respectively arranged on the cross beam (10.4), and the arc-shaped end face (19.1) of the jack is arranged opposite to the gas inlet valve (12) supported on the control support (8).
3. A modular mechanical pipe gas self-closing valve according to claim 1, characterized in that a tray (22) for sealing the gap between the membrane (13) and the pull rod (11) is sleeved on the upper end surface of the membrane (13) on the pull rod (11), and compaction is performed by a nut (23) screwed on the pull rod (11).
4. The self-closing valve for fuel gas in a modular mechanical pipeline according to claim 1, wherein said manual pull-up adjustment mechanism comprises: the lower part is connected with the inner side of the top opening of the circular arc-shaped upper cover (14), the upper part is connected with an adjusting gland (25) on the inner side of a limit pull button (26) which is penetrated up and down, and the vertical part of the lower part is inserted into the inner side of the upper part of the adjusting gland (25) and is connected with an inner pull button (27) on the upper part of the pull rod (11) through internal threads, the horizontal part on the upper part of the inner pull button (27) is lapped at the upper port of the limit pull button (26), when the limit pull button (26) is pulled up manually, the inner pull button (27) is driven to move up, and meanwhile, the inner pull button (27) drives an air inlet control valve starting mechanism (10) to move up through the connected pull rod (11), so that a jack (19) touches a touch shaft (12) on the air inlet control valve (5) to open an air outlet (9) of the ball valve cavity (1) to conduct an air source.
5. The self-closing valve for gas pipeline of claim 4, wherein the adjusting gland (25) is a lower adjusting gland (25.1) which is formed with external threads and is in threaded connection with the internal threads of the top opening of the circular arc-shaped upper cover (14), the lower adjusting gland (25.1) is integrally connected with the upper end of the lower adjusting gland (25.1), the diameter of the lower adjusting gland is smaller than that of the lower adjusting gland (25.1), an upper connecting cylinder (25.2) with a step is formed at the connecting position with the lower adjusting gland (25.1), a circle of outwards protruding limiting convex edges (25.3) are formed at the upper port of the upper connecting cylinder (25.2), a plurality of hooks (26.1) are formed at the lower periphery of the inner side of the limiting pull button (26), and when the limiting pull button (26) moves upwards for a set distance along the outer side of the upper connecting cylinder (25.2), the limiting convex edges (25.3) are straight with the hooks (26.1), so that the limiting pull button (26) cannot move upwards, and the upper connecting cylinder (25.2) can not move continuously.
6. The self-closing valve for modular mechanical pipeline gas according to claim 4, wherein the pull rod (11) is further sleeved with an upper spring (24), the upper end of the upper spring (24) is propped in a lower adjusting gland (25.1) of the adjusting gland (25), and the lower end of the upper spring is propped against the tray (22).
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| CN111486255B (en) * | 2020-05-22 | 2024-10-01 | 浙江中燃安全科技有限公司 | Mechanical pipeline gas self-closing valve |
| CN112915433B (en) * | 2021-02-07 | 2022-08-30 | 宁波正欣消防设备有限公司 | Novel high-pressure rotary jet fire extinguisher |
| CN114396499A (en) * | 2022-03-01 | 2022-04-26 | 浙江中燃安全科技有限公司 | Gas self-closing valve |
| CN114837824B (en) * | 2022-06-08 | 2024-05-28 | 江苏长盈机械有限公司 | Air inlet control valve with stepless regulation oil control system |
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| CN102748513A (en) * | 2012-06-11 | 2012-10-24 | 陕西大唐智能仪器仪表有限公司 | Over-flowing-pressure-difference self-closing valve |
| CN203757144U (en) * | 2014-04-08 | 2014-08-06 | 绍兴佳德安燃气设备科技有限公司 | Bracket for gas safety self-closing valve |
| CN105090579B (en) * | 2015-09-28 | 2017-05-10 | 李仲伦 | Pipeline fuel gas self-closing valve |
| CN205371733U (en) * | 2016-01-22 | 2016-07-06 | 西安维斯达仪器仪表有限公司 | Integral ball valve gas self -closing valve |
| CN208024891U (en) * | 2018-03-30 | 2018-10-30 | 西安维斯达仪器仪表有限公司 | Pipe gas self-closing valve |
| CN208311576U (en) * | 2018-05-09 | 2019-01-01 | 西安森驰燃气设备有限公司 | A kind of excessively flow integrated gas pipeline self-closing valve of band |
| CN208565692U (en) * | 2018-08-09 | 2019-03-01 | 成都中科唯实仪器有限责任公司 | A kind of segmented thrust spool and pipe gas self-closing valve |
| CN109058534B (en) * | 2018-10-10 | 2023-08-15 | 台州联自环化阀门有限公司 | Mechanical pipeline gas self-closing valve |
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