CN109058534B - Mechanical pipeline gas self-closing valve - Google Patents
Mechanical pipeline gas self-closing valve Download PDFInfo
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- CN109058534B CN109058534B CN201811177970.3A CN201811177970A CN109058534B CN 109058534 B CN109058534 B CN 109058534B CN 201811177970 A CN201811177970 A CN 201811177970A CN 109058534 B CN109058534 B CN 109058534B
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- jack
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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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0406—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of balls
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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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
A mechanical pipeline gas self-closing valve is provided with a manual knob mechanism which is arranged at the top end of a ball valve cavity and connected with a ball valve arranged in the ball valve cavity and used for controlling the ball valve cavity to be turned on or off, an air inlet threaded interface of an air inlet end of the ball valve cavity, an automatic control device which is provided with a control cavity integrally formed at the air outlet side of the ball valve cavity, an air outlet integrally formed with the control cavity, a channel switching mechanism arranged at an air channel at the integral connection position of the control cavity and the ball valve cavity, a touch mechanism arranged in the control cavity, a manual control mechanism used for controlling the touch mechanism arranged at the upper end of the control cavity, a leather membrane arranged at the upper opening of the control cavity, a pull rod penetrating from top to bottom in the center of the leather membrane, the upper end part of the pull rod positioned above the leather membrane is connected with the manual control mechanism, and the bottom end part of the pull rod positioned below the leather membrane is connected with the touch mechanism. The utility model can effectively solve the problem of leakage of various fuel gases.
Description
Technical Field
The utility model relates to a gas safety valve. In particular to a mechanical pipeline gas self-closing valve capable of preventing automatic shutoff due to gas overpressure, undervoltage, breakage and leakage.
Background
Because the current government is largely remediating the environmental pollution problem, the popularization of the industrial and civil fuel coal-to-gas engineering is greatly expanded, and because fuel gas is inflammable and explosive gas, the government makes related regulations and preventive measures for ensuring the gas safety, so engineering technicians in the industry propose various solutions.
At present, manufacturers of gas self-closing valves of various pipelines basically adopt permanent magnets as automatic control power, constant attraction force of the permanent magnets is highlighted in actual use, and the normal use range of working conditions is limited, so that when the gas consumption is high, the gas pressure is reduced to 0.8KPa, the gas source is automatically cut off, the illusion of general gas interruption is caused, most inconvenience is caused for gas users and gas companies, and the design is not suitable for the change of the working conditions with changeable gas transportation and distribution, so that the need of elimination is faced. In order to solve the problem, new design schemes are needed to be developed and overcome the defects.
The Chinese patent ZL 2015207576467.9 discloses a pipeline gas self-closing valve, wherein a leather membrane is arranged on the upper port of a gas storage bin of a main valve body, the leather membrane moves up and down along with the change of the air pressure in the gas storage bin to drive a shifting block arranged in the gas storage bin, the shifting block performs overturning movement in a limited range, and a valve plate in an air inlet channel of the main valve body is controlled to perform axial movement. When the gas is balanced, the ventilation state is maintained, when the gas is in overpressure, the valve plate is quickly rotated upwards and reversely to be separated from the valve plate, and the valve plate contacts with the sealing surface in the air inlet channel under the action of the spring to seal the gas channel. When the air pressure in the air storage bin is smaller than the standard limit; the shifting block is turned downwards to be separated from the valve plate, and the valve plate contacts with the sealing surface in the air inlet channel to block the gas channel under the action of the spring. When the working condition appears, the gas source can be automatically cut off when the gas is leaked due to overpressure, undervoltage and damage. Because the valve has the defects of not having a manual valve function and lacking the stability of accurately regulating and controlling the air pressure and the air flow. The utility model discloses a gas self-closing valve with a ZL 201720173658.1 pipeline, which is mainly technically designed in such a way that a normally closed valve plate is arranged in an air inlet channel of a main valve body, a normally open valve plate is arranged in an air outlet channel, a leather membrane and an upper cover are arranged at an upper port of a gas storage bin, one end of a pull rod is a reverse conical cylinder, one end of the pull rod penetrates through a central hole of the upper cover and a limit pull button to be combined with an inner pull Niu Luo after a pallet and a nut are fastened by the leather membrane, a control spring is sleeved on the pull rod, an overpressure and underpressure control device is formed, the normally closed valve plate and a guide rod of a long open valve are critical and the reverse conical cylinder of the pull rod, when the limit pull button is pulled upwards, the reverse conical cylinder of the pull rod pushes the normally closed valve plate to open the air source by the leather membrane and the control spring, when the pressure continues to rise beyond a rated range, the leather membrane expands, the control spring retracts the normally open valve plate to push the normally open valve plate to the closed air outlet channel to realize overpressure cut-off the air source, and when the air pressure in the gas storage bin is lower than the range, the normally closed guide rod is retracted to be separated from the normally closed by the reverse conical valve plate. The design solves the defect that the permanent magnet is not adjustable, but still has the problem that the high pressure stored in the gas storage bin can not be cut off, so that the gas storage bin needs to be further improved, perfected and optimized to thoroughly cut off the gas source, and the design is more suitable for the gas self-closing valve of the indoor gas safety protection pipeline. Because the current government is largely remediating the environmental pollution problem, the popularization of the industrial and civil fuel coal-to-gas engineering is greatly expanded, and because fuel gas is inflammable and explosive gas, the government makes related regulations and preventive measures for ensuring the gas safety, so engineering technicians in the industry propose various solutions.
Disclosure of Invention
The utility model aims to solve the technical problems of providing a mechanical pipeline gas self-closing valve which has complete functions, is safer, more reliable and more durable, is manually and automatically linked with a gas ball valve into a whole, and has various automatic protection functions.
The technical scheme adopted by the utility model is as follows: the utility model provides a mechanical pipeline gas self-closing valve, includes the ball valve, the ball valve is including the ball valve cavity, sets up the ball valve in the ball valve cavity, set up the ball valve cavity top and link to each other with the ball valve, be used for making the ball valve cavity switch on or close manual knob mechanism through the rotation of control ball valve, and connect be in the air inlet screw interface of ball valve cavity inlet end the gas outlet side of ball valve cavity is provided with has the superpressure, undervoltage, overflow's automatic control device, automatic control device is including the integrated control cavity who forms in the gas outlet side of ball valve cavity, the control cavity is kept away from the ball valve cavity that one side is formed with the gas outlet that is used for connecting outside gas hose integratively, the upper end of control cavity is formed with the upper shed, the control cavity is provided with the passageway switch mechanism that is used for opening and closing through the osculum under the ball valve on state the touch mechanism of moving the passageway switch mechanism, the touch upper end of control cavity is provided with the control film mechanism that is used for controlling the diaphragm down, the control film is located the lower diaphragm is located the control handle is located the lower diaphragm of control handle, the control handle is located the lower diaphragm is located the control handle is connected with the lower diaphragm, the control handle is located the lower side of the control handle is connected.
The channel switch mechanism comprises: the annular partition wall is integrally formed at the air outlet side of the air channel at the joint of the control cavity and the ball valve cavity, an air passing hole for feeding the fuel gas in the ball valve cavity into the control cavity is formed in the annular partition wall, an air inlet control valve for opening or closing the air passing hole through horizontal movement is arranged at the air passing hole of the annular partition wall, a guide support is arranged at one side, close to the control cavity, of the annular partition wall, a guide hole corresponding to the air passing hole and used for supporting the air inlet control valve and guiding horizontal movement of the air inlet control valve is formed in the guide support, an air inlet control spring is arranged at one side of the ball valve cavity, and the air inlet control spring is connected to the air inlet control valve through a spring support arranged at the outlet side of the ball valve cavity.
The pull rod comprises a main body, a lower thread, a disc, a middle thread and an upper thread, wherein the lower thread is formed at the lower end of the main body and used for being connected with the touch mechanism, the disc is integrally formed on the main body and positioned at the upper end of the lower thread, the middle thread is formed on the main body and positioned at the upper end of the disc and used for being connected with the leather film thread, and the upper thread is formed at the upper end of the main body and used for being connected with the manual control mechanism.
The touch mechanism comprises a central control bracket fixedly arranged in the control cavity, a guide channel is formed in the central control bracket in a penetrating way up and down, a first guide groove and a second guide groove are formed in two symmetrical side walls of the central control bracket respectively, the opening length of the first guide groove is larger than that of the second guide groove, a starting bracket of a II-shaped structure is arranged in the guide channel, the upper end of the starting bracket is in threaded connection with the lower threads of the pull rod, openings on two sides of the starting bracket are correspondingly arranged with the first guide groove and the second guide groove of the central control bracket, a jack is arranged in the starting bracket through a jack shaft, two ends of the jack extend out of the openings on two sides of the starting bracket and the first guide groove and the second guide groove of the central control bracket respectively, one end of the first guide groove is corresponding to an air inlet control valve in a channel switching mechanism, the air inlet control valve is triggered to open an air hole in the channel switching mechanism when the starting bracket moves up and down, the jack sleeve is arranged in the jack shaft to rotate around the jack shaft, and the jack shaft is enabled to rotate around the jack shaft.
The central control bracket is characterized in that two symmetrical side surfaces of the adjacent first guide groove and second guide groove are respectively provided with an outwards protruding lug, the lugs are provided with assembly holes, a positioning shoulder which corresponds to the two lugs of the central control bracket and is used for supporting the central control bracket is arranged in the control cavity, the positioning shoulder is provided with a screw hole which corresponds to the assembly holes on the lugs, and the lugs are fixed on the positioning shoulder through screws.
The starting support include the Pi shape support, set up the cylinder on Pi shape support top, the axial form be in the cylinder be used for with the internal thread that the pull rod carries out threaded connection, the symmetry is formed with the shaft hole that is used for supporting the jack axle respectively on two sides of Pi shape support, the inboard of a side base of Pi shape support is provided with the limiting plate that is used for supporting one end of torsion spring, another end of torsion spring is supported on the jack.
The jack include both ends stretch out respectively the opening of starting support both sides and well accuse support first guide way and second guide way's hollow jack body, the jack body stretch out first guide way and correspond the one end of inlet control valve be formed with be used for touching inlet control valve oblique cambered surface, the jack body is formed with the opening that can stretch out and support the end of torsion spring on the second guide way inboard in the vicinity, be formed with respectively on the both sides face of jack body with the shaft hole on the starting support corresponding the through-hole that is used for running through the jack axle.
The manual control mechanism comprises a tray sleeved on the pull rod and positioned above the leather membrane, a nut which is in threaded connection with the middle thread of the pull rod and positioned above the tray and used for positioning the tray, an inner pull button which is in threaded connection with the lower part of the nut on the upper thread of the pull rod, an upper cover which is connected with an upper opening of the control cavity and is sleeved on the periphery of the inner pull button through a lower port, and a limit pull button which is sleeved on the periphery of the upper port of the upper cover and the periphery of the inner pull button and used for driving the pull rod lifting mechanism through the inner pull button, wherein an upper spring is sleeved on the outer side of the nut, the upper end of the upper spring is propped against the bottom end of the inner pull button, and the lower end of the upper spring is propped against the upper surface of the tray.
The upper port of the control cavity is provided with a circle of annular groove, the outer periphery of the leather membrane is provided with a circle of convex edge which can be embedded into the annular groove of the control cavity, and a central hole formed in the center of the leather membrane is tightly sleeved on the pull rod.
The upper cover including can be with the middle part of pull rod and connect nut and spring and the tray on the pull rod hold the circular cap body including, circular cap body lower port is to the periphery horizontal bulge be formed with the cap edge, the cap edge is pressed the upper port edge of control cavity is used for the location embedding the chimb of the involucra in the annular groove of control cavity upper port, the periphery of cap edge is down vertically integrated with the sealing edge, the sealing edge cover is in on the upper port of control cavity, the top of circular cap body is formed with the opening, the opening part upwards convex is provided with and is used for the cover to be in the outside of interior pull button and be located spacing pull button inboard drum structure, the outside convex in top of drum structure is formed with and is used for restricting spacing pull button deviate from drum structure's spacing limit when lifting.
The limiting pull button comprises an annular body, wherein a plurality of barbs which outwards protrude outwards and are used for hooking with the limiting edge at the top port of the upper cover are formed in the annular body at equal intervals along the circumferential direction, and a separation groove which can enable the barbs to have elastic spaces is formed between every two barbs.
The mechanical pipeline gas self-closing valve has the advantages that each mechanism has independent functions and is associated with each other and definite in labor division, so that the mechanical pipeline gas self-closing valve is safer and more reliable. The utility model has the following advantages:
1. the automatic control mechanism with overpressure, undervoltage and overcurrent is arranged at the air outlet end of the common ball valve, so that various gas leakage problems are effectively solved, and in particular; when the gas supply is stopped due to gas pipeline maintenance or other reasons, the gas source can be automatically closed, so that the problem that disaster accidents are caused by gas leakage due to the fact that the gas valve is not closed when the gas supply is restored is solved.
2. The manual ball valve and the automatic control device are respectively arranged on the ball valve cavity and the control cavity, but the ball valve cavity and the control cavity are of an integral valve structure formed by integrally connecting and are mutually related, so that hidden danger of multipoint connection on a gas pipeline is eliminated, and the manual ball valve and the automatic control device are safer and more reliable.
Drawings
FIG. 1 is a schematic view of the external structure of a mechanical pipeline gas self-closing valve of the present utility model;
FIG. 2 is a schematic diagram of the internal structure of a mechanical pipeline gas self-closing valve according to the present utility model;
FIG. 3 is a schematic diagram of an exploded construction of a mechanical conduit gas self-closing valve of the present utility model;
FIG. 4 is a schematic view of the internal structure of the integrally connected ball valve cavity and control cavity of the present utility model;
FIG. 5 is a schematic top view of the integrally connected ball valve cavity and control cavity of the present utility model;
FIG. 6 is a schematic view of the structure of an intake control valve according to the present utility model;
FIG. 7 is a schematic view of the structure of the tie rod of the present utility model;
FIG. 8 is a schematic view of the structure of the actuating support of the present utility model;
FIG. 9 is a schematic cross-sectional view of an actuation bracket of the present utility model;
FIG. 10 is a schematic structural view of a center control bracket according to the present utility model;
FIG. 11 is a schematic view of the structure of the jack of the present utility model;
FIG. 12 is a schematic view of the torsion spring of the present utility model;
FIG. 13 is a schematic view of the structure of a coating film according to the present utility model;
FIG. 14 is a schematic view of the structure of the upper cover of the present utility model;
FIG. 15 is a schematic view of a limiting pull button according to the present utility model;
FIG. 16 is a schematic view showing the internal structure of the limit knob according to the present utility model;
FIG. 17 is a schematic top view of the inner knob of the present utility model;
FIG. 18 is a cross-sectional view of an inner pull button of the present utility model;
FIG. 19 is a schematic view of the structure of the spring bracket of the present utility model;
fig. 20 is a schematic view of the structure of the tray in the present utility model.
In the figure
1: ball valve cavity 2: central control bracket
2-1: guide channel 2-2: first guide groove
2-3: second guide groove 2-4: lug boss
2-5: fitting hole 3: starting support
3-1: II-shaped bracket 3-2: cylinder body
3-3: internal thread 3-4: shaft hole
3-5: limiting plate 4: jack (Jack)
4-1: oblique cambered surface 4-2: through hole
4-3: opening 4-4: jack body
5: torsion spring 5-1: end head
5-2: end 6: jack shaft
7: pull rod 7-1: lower thread
7-2: disc 7-3: middle screw thread
7-4: upper thread 7-5: main body
8: coating 8-1: center hole
8-2: convex edge 9: tray for holding food
10: nut 11: upper spring
12: upper cover 12-1: round cap body
12-2: cylindrical structure 12-3: limiting edge
12-4: sealing edge 12-5: hat brim
13: limiting pull button 13-1: annular body
13-2: partition groove 13-3: barb
14: inner pull button 14-1: ten-shaped groove
14-2: cylinder 14-3: internal thread
14-4: top cap 15: air inlet control valve
15-1: guide bar 15-2: rubber valve plate
15-3: rear axle 16: air inlet control spring
17: spring support 17-1: support ring
17-2: support spokes 17-3: center through hole
18: ball valve 19: sealing gasket
20: air intake nipple 21: dust-proof net
22: kong Kahuang 23: valve rod
24: o-ring 25: knob
26: screw 27: sealing gasket
28: control chamber 29: air outlet
30: annular partition wall 30: air passing hole
32: guide bracket 33: guide hole
34: positioning shoulder 35: screw hole
36: annular groove 37: sealing gasket mounting groove
38: spring bracket mounting groove 39: gas channel
40: cylinder 41: spacing boss
Detailed Description
The following describes a mechanical pipeline gas self-closing valve according to the present utility model in detail with reference to examples and drawings.
As shown in fig. 1, 2 and 3, the mechanical pipeline gas self-closing valve of the utility model comprises a ball valve, wherein the ball valve comprises a ball valve cavity 1, a ball valve 18 arranged in the ball valve cavity 1, a manual knob mechanism arranged at the top end of the ball valve cavity 1 and connected with the ball valve 18 and used for conducting or closing the ball valve cavity 1 by controlling the rotation of the ball valve 18, and an air inlet threaded interface 20 connected at the air inlet end of the ball valve cavity 1, and the valve is opened or closed manually through the ball valve 18. The automatic control device comprises a control cavity 28 which is integrally formed on the air outlet side of the ball valve cavity 1, an air outlet 29 which is used for being connected with an external fuel gas hose is integrally formed on the side, away from the ball valve cavity 1, of the control cavity 28, an upper opening is formed at the upper end of the control cavity 28, a channel switching mechanism which is used for switching on and off the air channel 39 is arranged at the position, where the control cavity 28 and the ball valve cavity 1 are integrally connected, of the air channel 39, a touch mechanism which is used for triggering the opening and the closing of the channel switching mechanism through up-down movement in a ball valve conducting state is arranged in the control cavity 28, a manual control mechanism which is used for controlling the touch mechanism to move up and down is arranged at the upper end of the control cavity 28, a leather membrane 8 which is used for closing the control cavity 28 and can bulge or collapse under the fuel gas drive in the control cavity 28 is arranged at the upper opening, a leather membrane 7 which penetrates through the center of the control cavity 28 up-down is arranged at the air channel 39, a pull rod 7 is arranged in the control cavity 28, and the pull rod 7 is arranged at the lower end of the leather membrane 8 is connected with the upper end of the pull rod 7.
As shown in fig. 2, 3 and 5, a knob 25 at the upper end of the ball valve cavity 1 is fixed by a screw 26. The gasket 19 is assembled in the gasket mounting groove on the air inlet side of the ball valve cavity 1, the gasket 27 is assembled in the gasket mounting groove 37 on the air outlet side of the ball valve cavity 1, and the ball valve 18 is assembled in the ball valve cavity 1. After the sealing gasket 19, the dustproof net 21 and the hole clamp spring 22 are assembled, the external thread of the air inlet threaded interface 20 is screwed and fixed with the internal thread of the ball valve cavity 1, and a limit boss 41 is arranged on the side surface of the cylinder 40, which is used for connecting the manual knob mechanism, at the upper end of the ball valve cavity 1 and used for limiting the knob 25 in the manual knob mechanism to do 90-degree rotation.
As shown in fig. 2 and 4, the channel switching mechanism includes: the annular partition wall 30 is integrally formed on the air outlet side of the air channel 39 at the joint of the control cavity 28 and the ball valve cavity 1, the annular partition wall 30 is provided with an air passing hole 31 for feeding the fuel gas of the ball valve cavity 1 into the control cavity 28, the air passing hole 31 of the annular partition wall 30 is provided with an air inlet control valve 15 for opening or closing the air passing hole 31 through horizontal movement, one side of the annular partition wall 30 close to the control cavity 28 is provided with a guide bracket 32, the guide bracket 32 is provided with a guide hole 33 corresponding to the air passing hole 31 and used for supporting the air inlet control valve 15 and guiding the horizontal movement of the air inlet control valve 15, one side of the air inlet control valve 15, which is positioned on the ball valve cavity 1, is provided with an air inlet control spring 16, and the air inlet control spring 16 is connected with the air inlet control valve 15 through a spring bracket 17 arranged on the outlet side of the ball valve cavity 1. As shown in fig. 6, the air inlet control valve 15 includes a rubber valve plate 15-2 for blocking the air passing hole 31 of the annular partition wall 30, a guide rod 15-1 connected to the center of one side of the rubber valve plate 15-2, and a rear shaft 15-3 connected to the center of the other side of the rubber valve plate 15-2, wherein the guide rod 15-1 sequentially penetrates through the air passing hole 31 of the annular partition wall 30 and a guide hole 33 on the guide bracket 32, and drives the rubber valve plate 15-2 to open or close the air passing hole 31 under the touch of the touch mechanism, and the rear shaft 15-3 is sleeved with an air inlet control spring 16.
As shown in fig. 2 and 7, the pull rod 7 includes a main body 7-5, a lower screw 7-1 formed at the lower end of the main body 7-5 for connecting with the touch mechanism, a disc 7-2 integrally formed on the main body 7-5 and located at the upper end of the lower screw 7-1, a middle screw 7-3 formed on the main body 7-5 and located at the upper end of the disc 7-2 for screw-connecting with the coating 8, and an upper screw 7-4 formed at the upper end of the main body 7-5 for connecting with the manual control mechanism.
As shown in fig. 2 and 7-12, the touch mechanism comprises a central control bracket 2 fixedly arranged in a control cavity 28, a guide channel 2-1 is formed through the central control bracket 2 up and down, a first guide groove 2-2 and a second guide groove 2-3 are formed on two symmetrical side walls of the central control bracket 2 respectively, the opening length of the first guide groove 2-2 is larger than that of the second guide groove 2-3, a starting bracket 3 of a Pitch-shaped structure is arranged in the guide channel 2-1, the upper end of the starting bracket 3 is in threaded connection with a lower thread 7-1 of the pull rod 7, openings on two sides of the starting bracket 3 are correspondingly arranged with the first guide groove 2-2 and the second guide groove 2-3 of the central control bracket 2, a jack 4 is arranged in the starting bracket 3 through a jack shaft 6, two ends of the jack 4 respectively extend out of the openings on two sides of the starting bracket 3 and the first guide groove 2-2 and the second guide groove 2-3 of the central control bracket 2, a jack 2-3 is arranged in the lower guide groove 2-3, a torsion spring is arranged in the lower guide groove 2-3 corresponding to the control bracket 2-5, and a reset mechanism is arranged in the lower guide groove 5 and is used for driving the lower control bracket 2-4 to rotate when the lower guide groove 5 is in the control bracket 4 to turn around the lower guide groove 5.
As shown in fig. 2, 5 and 10, the central control bracket 2 is provided with outwardly protruding lugs 2-4 on two symmetrical sides of the adjacent first guide groove 2-2 and second guide groove 2-3, the lugs 2-4 are provided with mounting holes 2-5, the control cavity 28 is provided with positioning shoulders 34 corresponding to the two lugs 2-4 of the central control bracket 2 for supporting the central control bracket 2, the positioning shoulders 34 are provided with screw holes 35 corresponding to the mounting holes 2-5 of the lugs 2-4, and the lugs 2-4 are fixed on the positioning shoulders 34 by screws.
As shown in fig. 2 and 8, the starting support 3 comprises a pi-shaped support 3-1, a cylinder 3-2 arranged at the top end of the pi-shaped support 3-1, internal threads 3-3 axially formed in the cylinder 3-2 and used for being in threaded connection with the pull rod 7, shaft holes 3-4 used for supporting the jack shaft 6 are symmetrically formed on two side surfaces of the pi-shaped support 3-1 respectively, a limiting plate 3-5 used for supporting one end 5-1 of the torsion spring 5 is arranged on the inner side of the bottom edge of one side surface of the pi-shaped support 3-1, and the other end 5-2 of the torsion spring 5 is supported on the jack 4.
As shown in fig. 2 and 11, the jack 4 includes a hollow jack body 4-4 with two ends respectively extending out of openings on two sides of the starting bracket 3 and a first guide slot 2-2 and a second guide slot 2-3 of the central control bracket 2, the jack body 4-4 is formed with an oblique cambered surface 4-1 extending out of the first guide slot 2-2 and corresponding to one end of the air intake control valve 15 for triggering the air intake control valve 15, the jack body 4-4 is formed with an opening 4-3 adjacent to the inner side of the second guide slot 2-3 for extending out of and supporting the end 5-2 of the torsion spring 5, and two sides of the jack body 4-4 are respectively formed with a through hole 4-2 corresponding to the shaft hole 3-4 on the starting bracket 3 for penetrating through the jack shaft 6.
As shown in fig. 2, the manual control mechanism comprises a tray 9 sleeved on the pull rod 7 and positioned above the membrane 8, a nut 10 which is in threaded connection with the middle thread 7-3 of the pull rod 7 and positioned above the tray 9 and used for positioning the tray 9, an inner pull button 14 which is in threaded connection with the upper thread 7-4 of the pull rod 7 at the lower part, an upper cover 12 which is connected with the upper opening of the control cavity 28 and is sleeved on the outer periphery of the inner pull button 14 at the upper port, and a limit pull button 13 which is sleeved on the outer periphery of the upper cover 12 and the outer periphery of the inner pull button 14 and used for driving the pull rod 7 to lift the touch mechanism through the inner pull button 14, an upper spring 11 is sleeved outside the nut 10, the upper end of the upper spring 11 is propped against the bottom end of the inner pull button 14, and the lower end of the upper spring 11 is propped against the upper surface of the tray 9, wherein when the membrane 8 is in an ascending state, the membrane 9 and the nut 8 are propped against the disc 2 of the pull rod 7 under the lower surface 7 of the pull rod 7.
As shown in fig. 2, 4, 5 and 13, the upper port of the control chamber 28 is formed with a ring-shaped groove 36, the outer periphery of the diaphragm 8 is formed with a ring of convex edge 8-2 capable of being embedded in the ring-shaped groove 36 of the control chamber 28, and the central hole 8-1 formed at the center of the diaphragm 8 is tightly sleeved on the pull rod 7.
As shown in fig. 2 and 14, the upper cover 12 includes a circular cap body 12-1 capable of accommodating the middle part of the pull rod 7, a nut 10 and a spring 11 connected to the pull rod 7, and a tray 9, wherein a cap rim 12-5 is formed on the lower port of the circular cap body 12-1, which protrudes horizontally towards the outer periphery, the cap rim 12-5 presses against the upper port edge of the control cavity 28 to position the convex edge 8-2 of the film 8 embedded in the annular groove 36 of the upper port of the control cavity 28, a sealing edge 12-4 is integrally formed on the outer periphery of the cap rim 12-5, and the sealing edge 12-4 is sleeved on the upper port of the control cavity 28, and the sealing edge 12-4 functions as: the upper port for compacting the leather membrane 8, sealing the control cavity 28 and fixedly connecting the upper cover 12 to the upper port of the control cavity 28, wherein an opening is formed at the top end of the round cap body 12-1, a cylinder structure 12-2 which is sleeved outside the inner pull button 14 and is positioned inside the limit pull button 13 is arranged at the opening in an upward protruding manner, and a limit edge 12-3 which is used for limiting the limit pull button 13 to be separated from the cylinder structure 12-2 when being lifted is formed at the top end of the cylinder structure 12-2 in an outward protruding manner.
As shown in fig. 2, 15 and 16, the limiting pull button 13 includes an annular body 13-1, a plurality of barbs 13-3 protruding outwards for hooking with a limiting edge 12-3 at the top end of the upper cover 12 are formed in the annular body 13-1 at equal intervals along the circumferential direction, and a separation groove 13-2 capable of making the barbs 13-3 have elastic spaces is formed between each two barbs 13-3.
As shown in fig. 2, 17 and 18, the inner pull button 14 includes a cylindrical body 14-2 which is inserted into a cylindrical structure 12-2 at the top end of the upper cover 12, a top cap 14-4 integrally formed at the top end of the cylindrical body 14-2 and used for being lapped on the upper end of the limit pull button 13, an inner thread 14-3 used for being connected with an upper thread 7-4 at the upper end of the pull rod 7 is formed on the cylindrical body 14-2 along a central axis, and a ten-piece groove 14-1 used for tightly connecting the inner pull button 14 with the upper thread 7-4 at the upper end of the pull rod 7 by a screwdriver is formed at the center of the upper end surface of the top cap 14-4.
As shown in fig. 4 and 19, the spring bracket 17 is disposed in a spring bracket mounting groove 38 at the air inlet end of the air passage 39 at the integral connection of the control chamber 28 and the ball valve chamber 1, and includes a support ring 17-1, a central through hole 17-3 formed at the center of the support ring 17-1 by support spokes 17-2, and the rear shaft 15-3 of the air inlet control valve 15 can be inserted into the central through hole 17-3 when the air inlet control valve 15 is in a state of opening the air passage 39.
As shown in fig. 1, 2 and 3, the working principle of the mechanical pipeline gas self-closing valve of the utility model is that after a ball valve 18 is opened through a knob 25, an automatic control device is started, wherein the automatic control device comprises an upward pulling limit pull button 13 to drive an inner pull button 14, a pull rod 7, a starting bracket 3, a jack 4, a torsion spring 5 and a jack shaft 6 to synchronously ascend, an upper spring 11 is retracted, and when the limit pull button 13 ascends to a limit edge 12-3 of a cylindrical structure 12-2 at the top end of an upper cover 12, the limit edge 12-3 blocks a barb 13-3, so that continuous upward movement of the limit pull button 13 is limited. The inclined cambered surface 4-1 of the jack 4 pushes the guide rod 15-1 of the air inlet control valve plate 15 to axially move, so that the rubber valve plate 15-2 of the air inlet control valve 15 is separated from the annular partition wall 30 at the air channel 39 between the integrally connected ball valve cavity 1 and the control cavity 28, air enters the control cavity 28, the leather membrane 8 is expanded along with the increase of air pressure, the resilience force of the upper spring 11 is counteracted under the pressure of the air, and the ventilation safety abstinence state is maintained.
When the gas pressure in the control cavity 28 exceeds the rated pressure, the diaphragm 8 continues to swell to drive the inner pull button 14, the pull rod 7, the starting bracket 3, the jack 4, the torsion spring 5 and the jack shaft 6 to synchronously ascend again, when the jack tail 4-3 at the end of the jack 4 far away from the oblique cambered surface 4-1 contacts the upper end of the second guide groove 2-3 of the central control bracket 2, the jack 4 is stirred at the upper end of the second guide groove 2-3 to perform clockwise rotation, the oblique cambered surface 4-1 is separated from the guide rod 15-1 of the air inlet control valve plate 15, the air inlet control valve plate 15 is closed with the annular partition wall 30 under the pushing of the air inlet control spring 16 to cut off the air source, the gas pressure in the control cavity 28 is reset, the touch mechanism descends under the pushing of the upper spring 11, the jack 4 contacts the guide rod 15-1 to continuously perform clockwise rotation to cross the guide rod 15-1, the origin is rotated under the action of the torsion spring 5, the automatic control device is restored to a static state, and the air source is automatically cut off.
When the gas hose is damaged and leaked, the gas pressure in the control cavity 28 is reduced when the rated gas supply flow is exceeded, the inner pull button 14, the pull rod 7, the starting bracket 3, the jack 4, the torsion spring 5 and the jack shaft 6 are synchronously lowered under the pushing of the upper spring 11, the inclined cambered surface 4-1 is separated from the guide rod 15-1 of the gas inlet control valve plate 15, the gas inlet control valve plate 15 is closed with the annular partition wall 30 under the pushing of the gas inlet control spring 16 to cut off a gas source, the gas pressure in the control cavity 28 is reset to zero, and the automatic control device is restored to a static state and automatically cuts off the gas source.
Under the condition that the mechanical pipeline gas self-closing valve works normally, the automatic control device can be restored to a static state of closing the gas source only by pressing the inner pull knob 14.
The specific examples described in this application are offered by way of illustration only. Those skilled in the art to which the utility model pertains may make various modifications or additions to or substitutions of the described embodiments or parts thereof without departing from the spirit of the utility model or the scope of the utility model as defined in the accompanying claims.
Claims (7)
1. The mechanical pipeline gas self-closing valve comprises a ball valve, wherein the ball valve comprises a ball valve cavity (1), a ball valve (18) arranged in the ball valve cavity (1), a manual knob mechanism which is arranged at the top end of the ball valve cavity (1) and connected with the ball valve (18) and used for conducting or closing the ball valve cavity (1) through controlling the rotation of the ball valve (18), and a gas inlet threaded interface (20) connected with the gas inlet end of the ball valve cavity (1), and the mechanical pipeline gas self-closing valve is characterized in that an automatic control device with overpressure, under-pressure and over-current is arranged at the gas outlet side of the ball valve cavity (1), the automatic control device comprises a control cavity (28) which is integrally formed at the gas outlet side of the ball valve cavity (1), an air outlet (29) which is used for connecting an external gas hose is integrally formed at the side of the control cavity (28), a gas channel (39) which is integrally connected with the ball valve cavity (1) is provided with an upper opening, a lower opening and closing mechanism is arranged at the upper opening and lower opening of the gas channel (39) and is used for controlling the upper opening and lower opening and closing of the upper opening and lower opening and closing mechanism of the upper opening and the lower opening and the control mechanism (28) of the upper opening and the control mechanism, the upper opening of the control cavity (28) is provided with a membrane (8) which is used for sealing the control cavity (28) and can bulge or collapse under the driving of fuel gas in the control cavity (28), the center of the membrane (8) is provided with a pull rod (7) which penetrates up and down, the upper end part of the pull rod (7) positioned above the membrane (8) is connected with the manual control mechanism, and the bottom end part of the pull rod (7) positioned below the membrane (8) is connected with the touch mechanism;
the channel switch mechanism comprises: an annular partition wall (30) which is integrally formed at the air outlet side of an air passage (39) at the joint of the control cavity (28) and the ball valve cavity (1), wherein an air passing hole (31) for feeding the fuel air of the ball valve cavity (1) into the control cavity (28) is formed on the annular partition wall (30), an air inlet control valve (15) for opening or closing the air passing hole (31) through horizontal movement is arranged at the air passing hole (31) of the annular partition wall (30), a guide bracket (32) is arranged at one side of the annular partition wall (30) close to the control cavity (28), a guide hole (33) which corresponds to the air passing hole (31) and is used for supporting the air inlet control valve (15) and guiding the horizontal movement of the air inlet control valve (15) is formed on the guide bracket (32), an air inlet control spring (16) is arranged at one side of the ball valve cavity (1), and the air inlet control spring (16) is connected to the air inlet control valve (15) through the spring bracket (17) arranged at the outlet side of the ball valve cavity (1);
the touch mechanism comprises a central control bracket (2) fixedly arranged in a control cavity (28), a guide channel (2-1) is formed in the central control bracket (2) in a penetrating way up and down, a first guide groove (2-2) and a second guide groove (2-3) are respectively formed on two symmetrical side walls of the central control bracket (2), the opening length of the first guide groove (2-2) is larger than that of the second guide groove (2-3), a starting bracket (3) with a II-shaped structure is arranged in the guide channel (2-1), the upper end of the starting bracket (3) is in threaded connection with a lower thread (7-1) of a pull rod (7), the openings at two sides of the starting bracket (3) are correspondingly arranged with the first guide groove (2-2) and the second guide groove (2-3) of the central control bracket (2), a jack (4) is arranged in the starting bracket (3) through a jack (6), the two ends of the jack (4) are respectively arranged at one end of the jack (2) corresponding to one end of the second guide groove (2-2) in the control bracket (2) and one end of the corresponding to one end (2-15), the device is used for triggering the air inlet control valve (15) to open an air passing hole (31) in the channel switching mechanism when the starting bracket (3) is driven to move up and down, a torsion spring (5) sleeved on the jack shaft (6) is arranged in the jack (4), and after the jack shaft (6) rotates around under the action of the central control bracket (2), the torsion spring (5) is used for resetting the jack (4);
the starting bracket (3) comprises a Pi-shaped bracket (3-1), a cylinder (3-2) arranged at the top end of the Pi-shaped bracket (3-1), internal threads (3-3) axially formed in the cylinder (3-2) and used for being in threaded connection with the pull rod (7), shaft holes (3-4) used for supporting jack shafts (6) are symmetrically formed on two side surfaces of the Pi-shaped bracket (3-1), a limiting plate (3-5) used for supporting one end head (5-1) of a torsion spring (5) is arranged on the inner side of the bottom edge of one side surface of the Pi-shaped bracket (3-1), and the other end head (5-2) of the torsion spring (5) is supported on the jack (4);
the jack (4) comprises a hollow jack body (4-4) with two ends respectively extending out of openings at two sides of the starting support (3) and a first guide groove (2-2) and a second guide groove (2-3) of the central control support (2), wherein the jack body (4-4) extends out of the first guide groove (2-2) and corresponds to one end of the air inlet control valve (15) to form an oblique cambered surface (4-1) for triggering the air inlet control valve (15), the jack body (4-4) is formed with an opening (4-3) which can extend out of and support an end head (5-2) of the torsion spring (5) on the inner side close to the second guide groove (2-3), and through holes (4-2) for penetrating through the jack shaft (6) are formed on two sides of the jack body (4-4) corresponding to the shaft holes (3-4) on the starting support (3).
2. The mechanical pipe gas self-closing valve according to claim 1, wherein the pull rod (7) comprises a main body (7-5), a lower thread (7-1) formed at the lower end of the main body (7-5) and used for being connected with the touch mechanism, a disc (7-2) integrally formed on the main body (7-5) and positioned at the upper end of the lower thread (7-1), a middle thread (7-3) formed on the main body (7-5) and positioned at the upper end of the disc (7-2) and used for being in threaded connection with the coating film (8), and an upper thread (7-4) formed at the upper end of the main body (7-5) and used for being connected with the manual control mechanism.
3. A mechanical pipeline gas self-closing valve according to claim 1, wherein the central control bracket (2) is provided with outwards protruding lugs (2-4) on two symmetrical side surfaces of the adjacent first guide groove (2-2) and second guide groove (2-3), the lugs (2-4) are provided with mounting holes (2-5), the control cavity (28) is internally provided with positioning shoulders (34) corresponding to the two lugs (2-4) of the central control bracket (2) and used for supporting the central control bracket (2), the positioning shoulders (34) are provided with screw holes (35) corresponding to the mounting holes (2-5) on the lugs (2-4), and the lugs (2-4) are fixed on the positioning shoulders (34) through screws.
4. The mechanical pipe gas self-closing valve according to claim 1, wherein the manual control mechanism comprises a tray (9) sleeved on the pull rod (7) and positioned above the membrane (8), a nut (10) which is in threaded connection with the middle thread (7-3) of the pull rod (7) and positioned above the tray (9) and used for positioning the tray (9), an inner pull button (14) which is in threaded connection with the upper thread (7-4) of the pull rod (7) at the lower part, an upper cover (12) which is connected with the upper opening of the control cavity (28) and is sleeved on the periphery of the inner pull button (14) at the upper port, and a limit pull button (13) which is sleeved on the periphery of the upper port of the upper cover (12) and the inner pull button (14) and used for driving the pull rod (7) to lift the mechanism through the inner pull button (14), an upper spring (11) is sleeved on the outer side of the nut (10), the upper spring (11) is in a state that the upper end of the upper spring (11) is propped against the lower end (14) of the tray (9), the leather film (8) is driven by the tray (9) and the screw cap (10) to be abutted against the upper surface of the disc (7-2) of the pull rod (7).
5. A mechanical pipe gas self-closing valve according to claim 4, characterized in that the upper port of the control chamber (28) is formed with a ring-shaped groove (36), the outer periphery of the diaphragm (8) is formed with a ring of convex edge (8-2) capable of being embedded in the ring-shaped groove (36) of the control chamber (28), and the central hole (8-1) formed in the center of the diaphragm (8) is tightly sleeved on the pull rod (7).
6. The mechanical pipe gas self-closing valve according to claim 4, wherein the upper cover (12) comprises a round cap body (12-1) capable of accommodating the middle part of the pull rod (7) and a nut (10) and a spring (11) connected to the pull rod (7) and a tray (9) therein, a cap rim (12-5) is formed by horizontally protruding the lower port of the round cap body (12-1) towards the outer periphery, the cap rim (12-5) is pressed on the upper port edge of the control cavity (28) for positioning a convex edge (8-2) of a film (8) embedded in an annular groove (36) of the upper port of the control cavity (28), a sealing edge (12-4) is integrally formed by vertically and downwardly surrounding the outer periphery of the cap rim (12-5), an opening is formed at the top end of the round cap body (12-1), a limit button (13) is arranged on the inner side (12-2) of the push button (14) in an upward protruding manner at the opening, the top end of the cylinder structure (12-2) is outwards protruded and is provided with a limit edge (12-3) for limiting the limit pull button (13) from falling out of the cylinder structure (12-2) when being lifted.
7. The mechanical pipeline gas self-closing valve according to claim 4, wherein the limiting pull button (13) comprises an annular body (13-1), a plurality of barbs (13-3) protruding outwards for hooking with a limiting edge (12-3) at the top end opening of the upper cover (12) are formed in the annular body (13-1) at equal intervals along the circumferential direction, and a separation groove (13-2) capable of enabling the barbs (13-3) to have elastic spaces is formed between every two barbs (13-3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811177970.3A CN109058534B (en) | 2018-10-10 | 2018-10-10 | Mechanical pipeline gas self-closing valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811177970.3A CN109058534B (en) | 2018-10-10 | 2018-10-10 | Mechanical pipeline gas self-closing valve |
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| CN109058534A CN109058534A (en) | 2018-12-21 |
| CN109058534B true CN109058534B (en) | 2023-08-15 |
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| CN201811177970.3A Active CN109058534B (en) | 2018-10-10 | 2018-10-10 | Mechanical pipeline gas self-closing valve |
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| CN111219509A (en) * | 2020-02-28 | 2020-06-02 | 浙江巨帆铜业有限公司 | Modular mechanical pipeline gas self-closing valve |
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| CN109058534A (en) | 2018-12-21 |
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Effective date of registration: 20230719 Address after: 317602 Floor 2, No. 66 Yongqing Road, Yuhuan City, Taizhou City, Zhejiang Province Applicant after: Taizhou Lianzihuan Valve Co.,Ltd. Address before: Room 302, Gate 2, Building 18, Yuanyinli, Linyuan Avenue, Nankai District, Tianjin, 300195 Applicant before: Li Zhonglun |
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