CN109826987B

CN109826987B - Time-delay automatic closing member and gas self-closing valve with timing closing function

Info

Publication number: CN109826987B
Application number: CN201910255505.5A
Authority: CN
Inventors: 张成祥; 张凯
Original assignee: Xi'an Yoyir Gas Equipment Co ltd
Current assignee: Xi'an Yoyir Gas Equipment Co ltd
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2023-10-03
Anticipated expiration: 2039-04-01
Also published as: CN109826987A

Abstract

The invention discloses a time-delay automatic closing element, which comprises a shell with an opening at the upper part, a plugging moving element, an upward-moving driving element which is arranged in the shell and drives the plugging moving element to move upwards, and a compression spring which pushes the plugging moving element to move upwards along the central axis of the shell, wherein the plugging moving element, the upward-moving driving element and the compression spring are all coaxially arranged with the shell, and the closing element realizes automatic time-delay closing action under the action of internal and external pressure differences of the plugging element in the shell and by pushing the upward-moving of the compression spring, so that the input cost is low and the use process is safe and reliable. The invention also discloses a gas self-closing valve with a timing closing function, which comprises a self-closing valve body with an air inlet and an air outlet, wherein the bottom of the self-closing valve body is provided with a lower opening, the outer side of the lower opening is provided with a time-delay automatic closing member, and the self-closing valve has the automatic timing closing function under the condition that the self-closing valve works normally by arranging the time-delay automatic closing member at the bottom of the self-closing valve body.

Description

Time-delay automatic closing member and gas self-closing valve with timing closing function

Technical Field

The invention belongs to the technical field of pipeline gas valves, and particularly relates to a delay automatic closing member and a gas self-closing valve with a timing closing function.

Background

In daily life, the household gas pipeline has some potential safety hazards. People often need to close the gas main valve when going out, or forget to close the valve due to negligence after the gas supply of the household gas pipeline is suddenly interrupted, and after the gas supply is restored by the pipeline, a large amount of gas can be discharged and diffused indoors, so that gas source waste is caused, and gas poisoning or accidents such as fire and explosion are easily caused. In the actual use process, the gas self-closing valve capable of automatically and timely closing when the gas in the household pipeline has the conditions of overpressure, undervoltage, micro leakage of the hose, falling off of the hose, gas leakage and the like is important, and the self-closing valve is one of indispensable important parts on the household gas pipeline.

The self-closing valve used at present has relatively single function, can be automatically closed only when the gas in the household pipeline has the conditions of overpressure, undervoltage, micro leakage of the hose, falling off of the hose, gas leakage and the like, and cannot be closed at regular time, so that the self-closing valve is inconvenient to use and operate and has poor use effect. The self-closing valve is a multipolar permanent magnet linkage mechanism which magnetizes permanent magnet materials according to design requirements to form permanent memory, recognizes the change of the pressure parameters of fuel gas passing through the multipolar permanent magnet linkage mechanism, automatically closes the valve when the pressure parameters exceed a safety set value, and cuts off an air source. Therefore, the gas self-closing valve is a purely mechanical valve, and the automatic closing process is not influenced by any external object. Therefore, in order to realize the timing closing of the self-closing valve, only an electronic device with a timing function or a time delay function can be used, the electronic device cannot be directly installed in the self-closing valve, and the electronic device has no direct relation with the self-closing valve closing process, and in general, an electronic shut-off valve with the timing function or the time delay function is additionally and independently installed on a gas pipeline, so that the input cost and the actual installation cost are increased, at least two leakage points are inevitably added on the gas pipeline, and the potential safety hazard of the gas pipeline is increased; meanwhile, as the electronic cut-off valve with the timing function or the time delay function needs to be provided with a power supply, the power supply needs to be frequently replaced when in actual use, otherwise, the electronic cut-off valve cannot be used, and the use and the operation are inconvenient; the sensitivity and the effectiveness of the electronic cut-off valve are directly influenced by the performances of a plurality of components, so that the problems that the action is unreliable, the automatic closing can not be performed on time and the like exist, and the use effect is poor; in addition, the electronic cut-off valve has a large potential safety hazard, and the electronic cut-off valve is easy to generate the problems of electric leakage and electric shock because the electronic cut-off valve needs to be powered on when in use.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the time-delay automatic closing member which has the advantages of simple structure, reasonable design, simple and convenient use and operation and good use effect, and can realize automatic time-delay closing action by pushing the plugging type moving member to move upwards under the action of internal and external pressure differences in the shell and by being matched with the compression spring, thus the input cost is low and the use process is safe and reliable.

In order to solve the technical problems, the invention adopts the following technical scheme: a time delay automatic closing member, characterized in that: the plugging type movable part comprises a shell with an upper opening, a plugging type movable part which is arranged in the middle of the inner side of the shell and can move up and down along the central axis of the shell, an upward-moving driving part which is arranged in the shell and drives the plugging type movable part to move up, and a compression spring which pushes the plugging type movable part to move up along the central axis of the shell, wherein the plugging type movable part, the upward-moving driving part and the compression spring are all coaxially arranged with the shell.

Above-mentioned time delay automatic closing spare, characterized by: the cross section of the inner cavity of the shell is round or regular polygon, and the shape of the moving plate is the same as the cross section of the inner cavity of the shell.

Above-mentioned time delay automatic closing spare, characterized by: the plugging type moving piece comprises a moving shaft and a moving plate, wherein the moving shaft is distributed along the central axis of the shell, the moving plate is coaxially and fixedly sleeved on the moving shaft and can move up and down along with the moving shaft, the moving plate is vertically distributed with the moving shaft, and the inner cavity of the shell is divided into an upper cavity and a lower cavity which is positioned right below the upper cavity through the moving plate;

the compression spring is positioned in the lower cavity and is supported between the bottom of the plugging moving piece and the bottom of the inner side of the shell.

Above-mentioned time delay automatic closing spare, characterized by: the movable shaft comprises a pushing column, and the pushing rod is arranged along the central axis of the shell; the pushing column is internally provided with a lower channel which is a channel for gas circulation and is distributed along the central axis of the pushing column.

Above-mentioned time delay automatic closing spare, characterized by: the movable shaft further comprises a push rod arranged right above the pushing column, and the push rod is coaxially connected with the pushing column and is arranged along the central axis of the shell; an upper channel is arranged in the push rod, is distributed along the central axis of the shell, and forms an air passage with the lower channel, wherein the air passage is used for communicating the lower cavity with the outer side of the shell.

Above-mentioned time delay automatic closing spare, characterized by: a plurality of air inlet channels are arranged in the lower channel, and the upper channel and the air inlet channels form an air inlet channel which communicates the lower cavity with the outer side of the shell; the lower channel is filled with a filler, and the air inlet channel is an air vent gap in the filler.

Above-mentioned time delay automatic closing spare, characterized by: the upward movement driving piece comprises a pushing armature for blocking an upper opening of the shell and a pushing magnet coaxially sleeved on the movable shaft and positioned right below the pushing armature, and the pushing armature is positioned in the shell and is arranged at the upper opening of the shell; the pushing armature and the pushing magnet are both positioned right above the moving plate.

Above-mentioned time delay automatic closing spare, characterized by: the movable plate comprises an annular flat plate coaxially and fixedly sleeved on the pushing column and an annular blocking piece for blocking an annular cavity between the shell and the movable flat plate, and the annular blocking piece is arranged on the outer side of the annular flat plate;

the pushing magnet is coaxially sleeved on the pushing column.

Above-mentioned time delay automatic closing spare, characterized by: the middle part of the pushing armature is provided with a through hole for installing the movable shaft, and the through hole is a guide hole for guiding the movable shaft;

The movable shaft is coaxially arranged in the guide hole.

Above-mentioned time delay automatic closing spare, characterized by: the pushing armature comprises a middle annular armature and an outer annular armature connected to the outer side of the upper part of the middle annular armature, and the middle annular armature is a circular flat armature and is vertically arranged with the moving shaft; the diameter of the outer annular armature is gradually reduced from top to bottom, the bottom of the outer annular armature is fixedly connected with the middle annular armature into a whole, and the bottom of the outer annular armature and the middle annular armature are arranged on the same plane.

Above-mentioned time delay automatic closing spare, characterized by: the push rod and the pushing column are both cylindrical, and the diameter of the push rod is not larger than that of the pushing column;

the bottom of the pushing column extends out to the lower part of the moving plate, a limiting ring is coaxially arranged on the outer side of the bottom of the pushing column, and the limiting ring is arranged right below the moving plate; the movable plate is positioned between the limiting ring and the pushing magnet.

Above-mentioned time delay automatic closing spare, characterized by: the annular blocking piece is an annular push plate which can be pushed up from bottom to top and enables gas in the lower cavity to be discharged to the upper cavity.

Above-mentioned time delay automatic closing spare, characterized by: the annular blocking piece is an annular rubber film.

Above-mentioned time delay automatic closing spare, characterized by: the pushing column and the moving plate form a piston positioned in the shell.

Meanwhile, the invention also discloses a gas self-closing valve with timing closing function, which has reasonable structural design, is simple and convenient to use and operate, and is capable of being automatically closed in a delayed manner by installing a delayed automatic closing piece at the bottom of the valve body, and is characterized in that: the automatic delay automatic closing device comprises a self-closing valve body with an air inlet and an air outlet, wherein a lower opening is formed in the bottom of the self-closing valve body, the outer side of the lower opening is provided with the delay automatic closing piece, and a shell of the delay automatic closing piece is a plugging piece for plugging the lower opening;

a small coating is arranged in the valve body of the self-closing valve, a large coating is arranged on the lower opening, and the small coating is positioned above the large coating; the small leather membrane divides the inner cavity of the self-closing valve body into an upper cavity and a lower cavity, the upper cavity and the lower cavity are respectively an upper valve cavity and a middle valve cavity, the pushing armature of the time-delay automatic closing piece is positioned below the large leather membrane, and the cavity between the upper cavity and the middle valve cavity is a lower valve cavity;

the lower end of a hand torsion bar inserted into the upper valve cavity through an upper mounting hole formed in the upper part of the valve body of the self-closing valve is fixedly connected with a small leather membrane, and a valve opening and closing assembly for opening or closing an air inlet and/or an air outlet is arranged in the middle valve cavity;

An upper magnetic adsorption assembly is arranged in the upper valve cavity and comprises a first magnetic adsorption piece arranged on the small leather membrane and a second magnetic adsorption piece arranged on the upper part of the self-closing valve body, and the second magnetic adsorption piece is positioned above the first magnetic adsorption piece; the middle valve cavity is internally provided with a middle magnetic adsorption assembly, the middle magnetic adsorption assembly comprises a third magnetic attraction piece arranged on the large leather membrane and a fourth magnetic attraction piece arranged above the third magnetic attraction piece, and the fourth magnetic attraction piece is arranged on the valve opening and closing assembly.

Above-mentioned gas self-closing valve with regularly close function, characterized by: the self-closing valve body is an integral valve body.

Above-mentioned gas self-closing valve with regularly close function, characterized by: the size of the large coating is larger than that of the small coating.

Above-mentioned gas self-closing valve with regularly close function, characterized by: the first magnetic attraction piece is a closed magnet, and the small leather film and the closed magnet are fastened and connected with the hand torsion bar into a whole; the second magnetic attraction piece is a closed armature;

the third magnetic attraction piece is a breaking magnet, and the fourth magnetic attraction piece is a breaking armature.

Above-mentioned gas self-closing valve with regularly close function, characterized by: the closing magnet is supported on the small leather membrane, and the breaking magnet is supported on the large leather membrane; the middle part of the closing armature is provided with a through hole for the hand torsion bar to pass through, and the closing armature is arranged in the upper mounting hole.

Above-mentioned gas self-closing valve with regularly close function, characterized by: the small leather membrane is positioned right below the large leather membrane, the closing magnet is positioned right below the hand torsion bar, the closing armature is positioned right above the closing magnet, the pushing armature of the time-delay automatic closing member is positioned right below the large leather membrane, the closing magnet is positioned right above the small leather membrane, the breaking magnet is positioned right above the large leather membrane, and the breaking armature is positioned right above the breaking magnet.

Above-mentioned gas self-closing valve with regularly close function, characterized by: the small leather membrane is fixed on the self-closing valve body through an annular lower limiting piece, and the annular lower limiting piece is positioned below the small leather membrane; the peripheral outer edges of the small leather films are fixedly arranged between the annular lower limiting piece and the self-closing valve body; the large coating is fixed between the self-closing valve body and the shell through pushing the armature.

In addition, the invention also discloses a gas self-closing valve with timing closing function, which has reasonable structural design, is simple and convenient to use and operate, and is provided with a delay automatic closing member at the bottom of the valve body and a reverse transmission mechanism for delay automatic closing, and comprises a self-closing valve body with an air inlet and an air outlet, and is characterized in that: the bottom of the self-closing valve body is provided with a lower opening, the outer side of the lower opening is provided with the time-delay automatic closing member, and the shell of the time-delay automatic closing member is a plugging member for plugging the lower opening;

The valve opening and closing assembly in the self-closing valve body is in transmission connection with the push rod of the time-delay automatic closing member through a reverse transmission mechanism.

Above-mentioned gas self-closing valve with regularly close function, characterized by: the self-closing valve body and the shell form a closed shell which is fixedly connected into a whole.

Above-mentioned gas self-closing valve with regularly close function, characterized by: the reverse transmission mechanism is a lever transmission structure, a gear transmission mechanism or a connecting rod transmission mechanism.

Above-mentioned gas self-closing valve with regularly close function, characterized by: the movable shaft of the delay automatic closing member is a valve closing driving part which pushes the valve opening and closing assembly to close the air inlet or the air outlet after moving upwards, and the valve opening and closing assembly is a timing opening assembly which drives the movable shaft to move downwards through the reverse transmission mechanism in the process of opening the air inlet or the air outlet.

Above-mentioned gas self-closing valve with regularly close function, characterized by: the self-closing valve body comprises a valve body formed by buckling a valve cover and a valve seat provided with an air inlet and an air outlet, a corrugated rubber film is arranged in the self-closing valve body, the inner cavity of the self-closing valve body is divided into an upper cavity and a lower cavity by the corrugated rubber film, the upper cavity and the lower cavity are respectively an upper valve cavity and a lower valve cavity, a valve cover hole formed in the middle of the valve cover is inserted into the lower end of a hand torsion bar in the upper valve cavity and fixedly connected with the corrugated rubber film, and the valve opening and closing assembly is an assembly which is arranged in the lower valve cavity and used for opening or closing the air inlet.

Compared with the prior art, the invention has the following advantages:

1. the adopted time delay automatic closing member has the advantages of simple structure, reasonable design, attractive and elegant appearance and simple and convenient installation and use.

2. The adopted time delay automatic closing member has lower input cost, can move upwards under the action of the internal and external pressure difference of the plugging member (namely the plugging type moving member) in the shell, is matched with the upward moving driving member through the compression spring, correspondingly realizes automatic time delay to perform closing action, and meanwhile, the upward moving driving member is a magnetic adsorption assembly, is skillfully designed through the matching of air pressure difference, magnetic adsorption and elastic force, does not need any external force or driving equipment, and has low input cost and safe and reliable use process.

3. The adopted delay automatic closing member is simple and convenient to use and operate, good in using effect and high in practical value, and can be matched with the self-closing valve to realize automatic delay closing of the self-closing valve; the valve can also be matched with other types of valves to realize the automatic delay closing of each valve, so that the use mode is flexible. Meanwhile, the delay automatic closing member can also be used as a delay closing executing member of other closed objects to realize delay closing control of all the controlled objects.

4. The adopted gas self-closing valve with the two membranes is simple and convenient to use and operate, good in use effect and high in practical value, has a timing closing function, is low in manufacturing cost and high in practicability, has the automatic closing function of a conventional self-closing valve under the abnormal conditions of overpressure, undervoltage, hose micro-leakage, hose falling, gas leakage and the like, and can be automatically closed when the abnormal conditions of overpressure, undervoltage, hose micro-leakage, hose falling, gas leakage and the like occur in a household gas pipeline; meanwhile, the automatic timing (or time-delay) closing function is realized, the automatic timing (or time-delay) closing of the self-closing valve is realized by adopting the time-delay automatic closing member, the time-delay automatic closing member is of a mechanical structure, driving equipment such as a driving power supply is not needed, and frequent maintenance, maintenance or replacement of driving borrowing equipment is not needed.

The gas self-closing valve utilizes the cooperation of the two membranes, the upper magnetic adsorption component and the lower magnetic adsorption component and the delay automatic closing component to realize simple and convenient opening and automatic delay closing, has simple structure and low input cost, is simple and convenient to use and operate, is not easy to be influenced by other components or use environments in the use process, has safe and reliable working performance, can effectively solve the problems that the existing electronic cut-off valve with a timing function or a delay function needs to be provided with a power supply, is inconvenient to use and operate, has sensitivity and effectiveness directly influenced by the performances of a plurality of components, is unreliable in action, can not perform automatic closing on time, has poor use effect and needs to be connected with the power supply, is easy to cause electric leakage and electric shock, has large potential safety hazard and the like.

5. The gas self-closing valve based on the reverse transmission mechanism comprises a self-closing valve body with an air inlet and an air outlet, and has a timing closing function, a lower opening is formed in the bottom of the self-closing valve body, a time delay automatic closing member is arranged outside the lower opening, and the time delay automatic closing member is in reverse linkage with a valve opening and closing assembly in the self-closing valve body through the reverse transmission mechanism, so that the self-closing valve has an automatic timing closing function (also called time delay automatic closing function) under the condition of normal operation. Meanwhile, the improvement of the existing self-closing valve is small, only the delayed automatic closing member is arranged at the bottom of the valve body, no influence is caused on other performances of the self-closing valve, and the self-closing valve has an automatic timing closing function while the normal self-closing function can be realized.

The technical scheme of the invention is further described in detail through the drawings and the embodiments.

Drawings

Fig. 1 is a schematic view showing the external structure of a time-lapse automatic closing member according to embodiment 1 of the present invention.

Fig. 2 is a schematic view showing the internal structure of the time-lapse automatic closing member according to embodiment 1 of the present invention.

Fig. 3 is a schematic structural view of a time-lapse automatic closing member in embodiment 2 of the present invention.

Fig. 4 is a schematic structural diagram of a gas self-closing valve in embodiment 3 of the present invention.

Fig. 5 is a schematic structural diagram of a gas self-closing valve in embodiment 4 of the present invention.

Fig. 6 is a schematic structural view of a reverse gear mechanism in embodiment 5 of the present invention.

Fig. 7 is a schematic structural view of a reverse gear mechanism in embodiment 6 of the present invention.

Fig. 8 is a schematic structural view of a reverse gear mechanism in embodiment 7 of the present invention.

Fig. 9 is a schematic structural view of a reverse gear mechanism in embodiment 8 of the present invention.

Fig. 10 is a schematic diagram of a gas self-closing valve in embodiment 10 of the present invention.

Fig. 11 is a schematic diagram of a gas self-closing valve in embodiment 11 of the present invention.

Reference numerals illustrate:

1-a valve cover; 2-valve seat; 3-an air inlet;

4-permanent magnet; 5-upper armature; 6-a corrugated rubber film;

7, tabletting; 8-a nut; 9-breathing holes;

11-lifting button; 12-green; 13-a red ring;

14-manual angle valve; 15-lower armature; 16-a pagoda-shaped air outlet port;

17-an air outlet; 18-limiting the armature; 19-an air inlet plug;

21-a return spring; 22-a depression;

25-pipe threaded air inlet connector; 26-a boss; 27-inclined channels;

28-a gasket; 29-a master control rod; 31-a limiting table;

32-positioning a blocking rod; 33-a guide rod; 34-rocker arm;

35-a rotating shaft; 36-connecting rod; 37-push rod;

38-a guide seat;

100—a hand torsion bar; 101-a housing; 102-compressing the spring;

103-pushing the column; 104-pushing the armature; 105—push magnet;

106-a ring-shaped flat plate; 107-annular plugs; 108-filler;

109-a stop collar; 110-a lock nut; 111-upper limit piece;

112-a guide ring; 201—small coating; 202-large coating;

203-closing a magnet; 204-closing the armature; 205-breaking the magnet;

206-breaking the armature; 207-lower limit piece; 208-a guide block;

209—upper swing arm; 210-a guide seat; 211-lower swing arms;

212-a hinging seat; 300-push rod;

301-lifting buttons; 302—a unitary valve body;

303-swing arm opening and closing transmission mechanism; 401-push rod;

402-reversing gear box; 403-reverse push rod; 404—a fixed hinge shaft;

405-a slider; 406—a hinge shaft; 407-upper gear;

408-a lower gear; 409-push-up teeth; 410-push down teeth;

411—a cylindrical push sleeve; 412-reversing gear; 413-inner pushing teeth;

414-pushing teeth outward; 415-a straight telescopic rod; 416-rocker arm assembly;

417-guide slots.

Detailed Description

Example 1

The time-delay automatic closing member as shown in fig. 1 and 2 comprises a shell 101 with an opening at the upper part, a plugging moving member which is arranged in the middle of the inner side of the shell 101 and can move up and down along the central axis of the shell 101, an upward moving driving member which is arranged in the shell 101 and drives the plugging moving member to move up, and a compression spring 102 which pushes the plugging moving member to move up along the central axis of the shell 101, wherein the plugging moving member, the upward moving driving member and the compression spring 102 are all coaxially arranged with the shell 101.

The inner cavity of the shell 101 is divided into an upper cavity and a lower cavity located right below the upper cavity by the plugging type moving piece, and the plugging type moving piece is a moving piece which plugs the upper portion of the lower cavity and can move up and down in the shell 101. The plugging moving piece is clamped in the shell 101, and the outer sides of the periphery of the plugging moving piece are clung to the inner side wall of the shell 101.

The upward movement driving member is connected with the plugging moving member, and the compression spring 102 is supported under the plugging moving member. The compression spring 102 is located within the lower cavity and is supported between the bottom of the plugging mobile member and the inside bottom of the housing 101.

Before actual use, the plugging moving member is pushed down to the bottom of the inner side of the casing 101, at this time, the time-lapse automatic closing member is in an open state, and the compression spring 102 is in a compressed state. When the plugging type moving member moves upwards to the upper part of the inner side of the shell 101 and stops, the time delay automatic closing member is in a closing state, and the time delay closing process of the time delay automatic closing member is completed. Thus, the time from pushing the shutter downward to the bottom inside the case 101 to the shutter moving upward to the upper inside of the case 101 and stopping is the time of the delayed closing of the delayed automatic closing member. Pushing the plugging moving member downwards to the bottom of the inner side of the shell 101, and moving the plugging moving member upwards to the upper part of the inner side of the shell 101 and stopping the plugging moving member, wherein the process is that the time-delay automatic closing member is in a closed state from an open state; the time required for the time delay automatic closing member to be in the closed state from the open state is the time delay closing time of the time delay automatic closing member.

The plugging type moving member comprises a moving shaft and a moving plate, wherein the moving shaft is distributed along the central axis of the shell 101, the moving plate is coaxially and fixedly sleeved on the moving shaft and can move up and down along with the moving shaft, the moving plate is vertically distributed with the moving shaft, and an inner cavity of the shell 101 is divided into an upper cavity and a lower cavity which is positioned right below the upper cavity through the moving plate. The shape of the moving plate is the same as the cross-sectional shape of the inner cavity of the housing 101.

In actual use, the blocking type moving member may be a piston. The movable shaft in the plugging type movable piece is a piston rod, and the movable plate is a piston plate. The blocking type moving member may be various types of pistons.

In this embodiment, the moving shaft includes a pushing post 103, where the pushing post 103 is disposed along a central axis of the housing 101, and a lower channel is disposed in the pushing post 103, and the lower channel is a channel through which the gas flows and is disposed along the central axis of the pushing post 103. The upper and lower parts of the lower channel are both open.

The compression spring 102 is located within the lower cavity and is supported between the moving plate bottom and the inside bottom of the housing 101. For easy installation, firm fixation, and safe and reliable use, a circular groove for installing the compression spring 102 is formed at the bottom of the housing 101.

In this embodiment, the moving plate is mounted on the pushing post 103 and is located at the lower portion of the pushing post 103.

In actual use, the plugging moving member moves upwards under the action of the elastic force of the compression spring 102, the action of the air pressure difference between the lower cavity and the upper cavity and the driving action of the upward movement driving member, and the process from the opening state to the closing state of the time-delay automatic closing member is completed. When the time delay automatic closing member is in a closing state from an opening state, the object to be closed is pushed to be closed upwards through the moving shaft, so that the moving shaft is a closing executing member. The closed object is a mechanism capable of being closed by pushing upwards through the moving shaft, so that the plugging moving part can complete the delayed automatic closing of the closed object under the action of the elastic force of the compression spring 102, the action of the air pressure difference between the lower cavity and the upper cavity and the driving action of the upward moving driving part, and the time required by the delayed automatic closing part from the opening state to the closing state is the delayed closing time of the closed object.

For convenience of operation, in this embodiment, the moving shaft further includes a push rod 300 disposed directly above the pushing post 103, where the push rod 300 is coaxially connected to the pushing post 103 and disposed along the central axis of the housing 101; an upper channel is arranged in the push rod 300, and the upper channel and the lower channel are both arranged along the central axis of the shell 101 and form an air passage for communicating the lower cavity with the outer side of the shell 101. At this time, the push rod 300 is a closing actuator. When the time-delay automatic closing member is switched from the open state to the closed state, the closed object is pushed upwards by the push rod 300 to be closed. The push rod 300 and the pushing post 103 are connected in a threaded connection mode, a buckling mode, a welding mode and the like.

In actual use, the moving shaft may be a pushing column 103 alone. At this time, the closed object is pushed upward by the push column 103 to be closed.

The upward-moving driving piece is a magnetic adsorption component, and the magnetic adsorption component comprises an upper magnetic attraction piece fixed at an opening at the upper part of the shell 101 and a lower magnetic attraction piece arranged on the moving shaft, and the upper magnetic attraction piece and the lower magnetic attraction piece are matched for use and mutually attracted. When in actual use, the purpose of driving the movable shaft to move upwards is realized through the attraction force between the lower magnetic attraction piece and the upper magnetic attraction piece.

In this embodiment, the upward movement driving member includes a push armature 104 for blocking an upper opening of the housing 101 and a push magnet 105 coaxially sleeved on the movement shaft and located right below the push armature 104, where the push armature 104 is located in the housing 101 and is disposed at the upper opening of the housing 101; the push armature 104 and push magnet 105 are both located directly above the moving plate. The push armature 104 is located directly above the push magnet 105.

Thus, the upper magnet is a push armature 104 and the lower magnet is a push magnet 105. When in actual use, the upper magnetic attraction piece and the lower magnetic attraction piece can be magnets, and only the mutual attraction between the upper magnetic attraction piece and the lower magnetic attraction piece after the upper magnetic attraction piece and the lower magnetic attraction piece are moved to a certain distance can be met. In addition, the upper magnetic attraction piece can also be an armature, and at the moment, the lower magnetic attraction piece is a magnet, and the upper magnetic attraction piece and the lower magnetic attraction piece can only attract each other after the upper magnetic attraction piece and the lower magnetic attraction piece move to a certain distance. The device is flexible in actual operation, simple and convenient to arrange and install, reliable in working performance and sensitive in action.

The pushing magnet 105 is fixedly installed on the moving shaft and moves up and down in the shell 101 synchronously with the moving shaft, and the pushing magnet 105 is vertically arranged with the moving shaft. In this embodiment, the pushing magnet 105 is a ring magnet. In actual use, the pushing magnet 105 may have a circular shape, a regular polygon, or the like.

In this embodiment, the pushing magnet 105 is coaxially sleeved on the pushing post 103, and the pushing armature 104 is coaxially sleeved in the housing 101.

In actual processing, the cross section of the inner cavity of the housing 101 is circular or regular polygon, and the shape of the moving plate is the same as the cross section of the inner cavity of the housing 101. In this embodiment, the cross section of the inner cavity of the housing 101 is circular, so the housing 101 is a cylindrical housing with an upper opening, i.e. the housing 101 is a cylindrical cylinder.

The pushing armature 104 is an iron sheet and has the same shape as the cross section of the inner cavity of the shell 101, and the pushing armature 104 is fixedly arranged on the shell 101.

In actual processing, the pushing armature 104 includes a middle annular armature and an outer annular armature connected to the outer side of the upper part of the middle annular armature, where the middle annular armature is a circular flat armature and is vertically arranged with the moving shaft; the diameter of the outer annular armature is gradually reduced from top to bottom, the bottom of the outer annular armature is fixedly connected with the middle annular armature into a whole, and the bottom of the outer annular armature and the middle annular armature are arranged on the same plane.

In this embodiment, the push armature 104 is formed by bending an iron sheet.

In this embodiment, the push armature 104 includes an upper armature, a lower armature located above and below the upper armature, and a middle armature connected between the upper armature and the lower armature. The upper armature and the lower armature are annular armatures and are arranged in parallel with the push magnet 105, and the middle armature is cone-shaped and gradually reduces in diameter from top to bottom. The upper part of the middle armature is connected with the middle part of the upper armature, and the lower part of the middle armature is connected with the middle part of the lower armature. The upper part of the middle armature and the upper armature are arranged on the same plane, and the lower part of the middle armature and the lower armature are arranged on the same plane. In this way, the push armature 104 can be simply, quickly and reliably fixed to the housing 101 by the upper armature, and can be tightly connected to the housing 101 so as to seal the upper opening of the housing 101. Meanwhile, the diameter of the middle armature is gradually reduced from top to bottom, so that gas can conveniently enter the lower cavity through the air passage, the purpose of adjusting the air pressure difference between the lower cavity and the upper cavity is achieved, and the purpose of pushing the plugging moving piece to slowly move upwards is achieved. In addition, the lower armature is positioned under the middle armature, so that the movable shaft is more conveniently guided, and the delayed closing process of the delayed automatic closing member can be simply, conveniently and reliably performed.

In this embodiment, the upper armature and the lower armature are both circular ring shaped iron pieces and are both circular ring shaped flat armatures.

The outer annular armature is the middle armature, and the middle annular armature is the lower armature.

A through hole for installing the movable shaft is formed in the middle of the pushing armature 104, and the through hole is a guide hole for guiding the movable shaft; the upper part of the movable shaft is coaxially arranged in the guide hole. The guide holes are arranged along the central axis of the housing 101. The moving shaft moves up and down in the guide hole.

In this embodiment, the pilot hole is located on the lower armature.

In order to further improve the guiding effect of the guiding hole, a guiding sleeve is arranged in the middle of the pushing armature 104, and the guiding sleeve is coaxially sleeved on the moving shaft. The cross section shape of the guide sleeve is the same as that of the movable shaft, the inner side wall of the guide sleeve is clung to the outer side wall of the movable shaft, and the guide sleeve and the pushing armature 104 are fastened and connected into a whole.

In this embodiment, the guide hole is a circular hole, and the guide sleeve is a cylindrical guide sleeve. The movable shaft is cylindrical. The cylindrical guide sleeve is a guide ring 112 for guiding the moving shaft.

In actual use, the pushing post 103 or the pushing rod 300 is coaxially installed in the guiding hole.

In this embodiment, the upper channel and the lower channel are both cylindrical channels. The diameter of the upper channel is smaller than that of the lower channel, and the upper channel is positioned right above the lower channel.

In this embodiment, the middle part of the push armature 104 is provided with the guide hole for mounting the push post 103, and the push post 103 is coaxially mounted in the guide hole.

In the actual use process, when the time-delay automatic closing member is in the closed state from the open state, the top end of the pushing post 103 gradually moves upwards from the inside of the guiding hole to the position above the pushing armature 104.

In this embodiment, the moving plate includes an annular flat plate 106 coaxially and fixedly sleeved on the pushing post 103, and an annular blocking member 107 for blocking an annular cavity between the housing 101 and the moving flat plate 106, where the annular blocking member 107 is disposed outside the annular flat plate 106.

The annular blocking member 107 is a blocking member for blocking gas entering the lower chamber from the upper chamber.

In this embodiment, the annular sealing member 107 is a unidirectional valve plate and is in a truncated cone shape, and the diameter of the annular sealing member 107 gradually decreases from top to bottom. The annular flat plate 106 and the annular blocking piece 107 are arranged coaxially with the moving shaft, and the annular flat plate 106 is arranged vertically with the moving shaft.

The annular sealing member 107 is an annular push plate capable of being pushed up from bottom to top and discharging the gas in the lower cavity to the upper cavity. In actual use, in the process of pushing the plugging moving member downwards by external force, the gas in the lower cavity pushes the annular plugging member 107 to be pushed up from bottom to top, and the gas in the lower cavity is discharged to the upper cavity.

In this embodiment, the annular sealing member 107 is an annular rubber membrane. The annular rubber membrane may be a corrugated rubber membrane.

In actual use, the annular blocking member 107 may be a plate of other types, and only needs to be pushed up from bottom to top under the action of the gas in the lower cavity, and after the annular blocking member 107 is pushed up from bottom to top, the annular blocking member 107 is in an open state, at this time, an annular gap exists between the annular blocking member 107 and the inner side wall of the housing 101, and the gas in the lower cavity enters the upper cavity through the annular gap. When the moving plate of the plugging moving member is pushed down to the bottom of the inner side of the casing 101, the gas in the lower cavity is substantially completely discharged, the upward pushing force on the annular plugging member 107 disappears, the annular plugging member 107 automatically turns down, the annular plugging member 107 turns down and is in a closed state, and the annular plugging member 107 is in close contact with the inner side wall of the casing 101. Accordingly, the annular sealing member 107 is always in a closed state during the time period from the open state to the closed state, and the annular sealing member 107 is in close contact with the inner side wall of the housing 101. Therefore, the action process of the time-delay automatic closing member can be effectively ensured to be safe and reliable.

During actual processing, a plurality of air inlet channels are arranged in the lower channel, and the upper channel and the air inlet channels form an air inlet channel for communicating the lower cavity with the outer side of the shell 101.

In this embodiment, the lower channel is filled with a filler 108, and the air inlet channel is an air vent gap in the filler 108.

In this embodiment, the filler 108 is a powder filler.

The powdery filler is powder, such as metal powder, nonmetal powder and the like. Wherein the metal powder comprises ferrous metal powder, nonferrous metal powder, synthetic metal powder, etc. The ferrous metal includes three kinds of iron, chromium and manganese, and the nonferrous metal includes aluminum, magnesium, potassium, sodium, calcium, strontium, barium, copper, lead, zinc, tin, cobalt, nickel, antimony, mercury, cadmium, bismuth, gold, silver, platinum, ruthenium, rhodium, palladium, osmium, iridium, beryllium, lithium, rubidium, cesium, titanium, zirconium, vanadium, niobium, tantalum, tungsten, molybdenum, gallium, indium, thallium, germanium, rhenium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium, thorium and the like. Synthetic metal refers to a substance composed of two or more chemical elements, at least one of which is a metal element and having a metallic characteristic, called an alloy. Alloys composed of two elements are collectively referred to as "binary alloys", and alloys composed of three or more elements are collectively referred to as "multi-element alloys".

In order to reduce the cost, the metal powder can be iron powder, aluminum powder, copper powder, zinc powder and the like.

The nonmetallic powder comprises carbon powder, quartz sand powder, rubber powder and the like.

In this embodiment, the filler 108 is quartz sand powder. In practice, the filler 108 may be other types of powder filler (also referred to as powder), and may be a filler structure that can be filled into the lower channel and form an internal ventilation gap.

In practice, the filler 108 may be a filling structure formed by compacting cotton yarn, cotton thread, or the like. After filling the lower channel with cotton, cotton threads, etc. threads and compacting them tightly, the filling 108 is formed.

The filler 108 may be an elastic filler, a filling structure formed by pouring a pouring material, a filling structure formed by 3D printing, or the like, and may be filled into the lower channel with a vent gap therein. Wherein the elastic filler is rubber, sponge, etc.

In this embodiment, the push rod 300 and the pushing post 103 are both cylindrical.

The diameter of the push rod 300 is not greater than the diameter of the push post 103. In this embodiment, the diameter of the push rod 300 is smaller than that of the pushing post 103, the lower part of the push rod 300 is coaxially installed at the upper part of the inner side of the lower channel, and the bottom of the push rod 300 is supported on the filler 108.

In this embodiment, the diameter of the guide hole is larger than the diameter of the moving shaft at the position where the guide hole is located, and an annular gap exists between the guide hole and the moving shaft, so that the upper cavity is communicated with the cavity above the push armature 104.

The pushrod 300 is located above the lower armature.

In this embodiment, the bottom of the pushing post 103 extends below the moving plate, a limiting ring 109 is coaxially disposed on the outer side of the bottom of the pushing post 103, and the limiting ring 109 is disposed right below the moving plate; the moving plate is located between the stop collar 109 and the push magnet 105.

For easy and reliable fixation, the pushing magnet 105 and the pushing post 103 are locked and fixed by a locking nut 110, and the locking nut 110 is coaxially sleeved on the pushing post 103 and is located above the pushing magnet 105.

As can be seen from the above, in this embodiment, the annular sealing member 107 is an annular rubber film. The pushing magnet 105 is a ring magnet. The pushing post 103 and the moving plate constitute a piston located within the housing 101.

When the automatic delay closing device is actually used, the sum of the cross sectional areas of a plurality of air inlet channels is adjusted, specifically, the size and the number of the air inlet channels are adjusted, the speed of air entering the lower cavity from the air inlet channel is adjusted, the air pressure difference between the lower cavity and the upper cavity is correspondingly adjusted, and therefore the time required by the time when the delay automatic closing device is in an opening state to a closing state (namely, the delay closing time of the delay automatic closing device) is adjusted, the automatic delay closing device is extremely simple and convenient in actual operation, safe and reliable in working performance, and an automatic delay closing function can be automatically completed on time.

When the time-delay automatic closing member is adopted for time-delay closing, the blocking type moving member is pushed downwards by external force until the moving plate of the blocking type moving member is pushed downwards to the bottom of the inner side of the shell 101, so that the pushing magnet 105 is separated from the pushing armature 104, the compression spring 102 is in a compression state at the moment, and the time-delay automatic closing member enters a time-delay closing state; in the process of pushing the blocking type moving member downwards, the annular blocking member 107 is pushed upwards by the gas in the lower cavity, so that the lower cavity is communicated with the upper cavity, the gas in the lower cavity rapidly enters the upper cavity, at this time, the gas pressure of the lower cavity is lower than the gas pressure in the upper cavity, and the gas pressure of the lower cavity is lower than the gas pressure outside the shell 101 (specifically, the gas pressure above the armature 104 is pushed), and the upper cavity is provided.

After the delay automatic closing member enters a delay closing state, gas outside the lower cavity (including gas outside the shell 101 above the pushing armature 104) gradually enters the lower cavity through the air passage (specifically the air inlet passage), so that the air pressure of the lower cavity is gradually increased, and accordingly, the pressure difference between the upper cavity and the lower cavity (namely, the air pressure difference) is gradually reduced until the pressure difference between the upper cavity and the lower cavity is gradually reduced until the compression spring 102 can push the plugging moving member to move upwards, and the compression spring 102 pushes the bottom of the moving shaft to push the plugging moving member to move upwards until the pushing magnet 105 and the pushing armature 104 are attracted, so that the delay closing process of the delay automatic closing member is completed.

The time required for the pushing magnet 105 and the pushing armature 104 to be attracted after the plugging moving member is pushed down to the bottom of the inner side of the casing 101 is the delayed closing time of the delayed automatic closing member. The plugging moving member moves upwards under the combined action of the air pressure difference action between the lower cavity and the upper cavity, the elastic action of the compression spring 102 and the driving action of the upward movement driving member, and the process of the time-delay automatic closing member from the opening state to the closing state is completed.

The plugging moving piece moves upwards slowly under the action of pressure difference (namely air pressure difference) between the upper cavity and the lower cavity at the beginning stage of upward movement; when the blocking type moving member moves upwards to the point that the compression spring 102 can push the blocking type moving member to move upwards, the blocking type moving member moves upwards, meanwhile, the magnet 105 is pushed to attract each other under the action of the magnetic attraction of the armature 104, and the blocking type moving member is driven to synchronously and rapidly move upwards, so that the time delay closing process of the time delay automatic closing member is completed. The time delay closing of the time delay automatic closing member is mainly the time when the plugging moving member slowly moves upwards under the action of the pressure difference (namely, air pressure difference) between the upper cavity and the lower cavity, once the compression spring 102 can push the plugging moving member to move upwards, the pushing magnet 105 and the pushing armature 104 can be quickly attracted, and the whole closing process is reliable. Therefore, the time delay closing process of the time delay automatic closing member is simple and convenient, the action process is safe and reliable, the action is reliable without any other driving device such as a power supply, the automatic closing can be completed on time, and the use effect is good.

Example 2

As shown in fig. 3, in this embodiment, unlike embodiment 1, there is: the middle part of the pushing armature 104 is provided with the guide hole for installing the push rod 300; the push rod 300 is coaxially installed in the guide hole.

The guide sleeve is a guide for guiding the push rod 300. The top end of the pushrod 300 is positioned within the pilot bore or above the push armature 104.

For easy and reliable fixation, the moving plate and the pushing column 103 are locked and fixed by a lock nut 110, and the lock nut 110 is coaxially sleeved on the pushing column 103 and is positioned above the moving plate;

the moving plate is secured between the lock nut 110 and the stop collar 109.

In this embodiment, the pushing magnet 105 is located above the lock nut 110;

the pushing post 103 is provided with an upper limiting part 111 for limiting the pushing magnet 105, and the upper limiting part 111 is located above the pushing magnet 105.

In this embodiment, the structure, connection relationship and operation principle of the rest of the delay automatic closing member are the same as those of embodiment 1.

Example 3

The gas self-closing valve with the timing closing function as shown in fig. 4 comprises a self-closing valve body with an air inlet 3 and an air outlet 17, wherein a lower opening is formed in the bottom of the self-closing valve body, the outer side of the lower opening is provided with the time delay automatic closing member, and a shell 101 of the time delay automatic closing member is a plugging member for plugging the lower opening;

A small coating 201 is arranged in the self-closing valve body, a large coating 202 is arranged on the lower opening, and the small coating 201 is positioned above the large coating 202; the small diaphragm 201 divides the inner cavity of the self-closing valve body into an upper cavity and a lower cavity, the upper cavity and the lower cavity are respectively an upper valve cavity and a middle valve cavity, the pushing armature 104 of the time-delay automatic closing member is positioned below the large diaphragm 202, and a cavity between the upper cavity and the middle cavity is a lower valve cavity;

the lower end of a hand torsion bar 100 inserted into the upper valve cavity through an upper mounting hole formed in the upper part of the self-closing valve body is fixedly connected with a small leather membrane 201, and a valve opening and closing assembly for opening or closing the air inlet 3 and/or the air outlet 17 is arranged in the middle valve cavity;

an upper magnetic adsorption assembly is arranged in the upper valve cavity and comprises a first magnetic adsorption piece arranged on the small leather membrane 201 and a second magnetic adsorption piece arranged on the upper part of the self-closing valve body, and the second magnetic adsorption piece is positioned above the first magnetic adsorption piece; the middle valve cavity is internally provided with a middle magnetic adsorption assembly, the middle magnetic adsorption assembly comprises a third magnetic attraction piece arranged on the large leather membrane 202 and a fourth magnetic attraction piece arranged above the third magnetic attraction piece, and the fourth magnetic attraction piece is arranged on the valve opening and closing assembly.

The small film 201 and the large film 202 are both rubber films (also referred to as films or rubber films). The small film 201 and the large film 202 may be corrugated rubber films. The small film 201 and the large film 202 have the same thickness. The size of the large coating 202 is larger than the size of the small coating 201. The size of the large film 202 being larger than the size of the small film 201 means that the surface area of the large film 202 is larger than the surface area of the small film 201. By adjusting the dimensions of the small coating 201 and the large coating 202, the thrust force after the stress of the small coating 201 and the large coating 202 can be correspondingly adjusted, the adjustment is simple and convenient, and the working performance is safe and reliable.

In this embodiment, the small coating 201 and the large coating 202 are both circular.

In this embodiment, the size of the large coating 202 being larger than the size of the small coating 201 means that the diameter of the large coating 202 is larger than the diameter of the small coating 201.

In actual use, the upper magnetic adsorption component is matched with the small coating 201, and the middle magnetic adsorption component is matched with the large coating 202.

The first magnetic attraction piece and the second magnetic attraction piece in the upper magnetic attraction assembly are matched, and after the first magnetic attraction piece and the second magnetic attraction piece move to a certain distance, the first magnetic attraction piece and the second magnetic attraction piece attract each other until attraction. The third magnetic attraction piece and the fourth magnetic attraction piece in the middle magnetic attraction assembly are matched, and after the third magnetic attraction piece and the fourth magnetic attraction piece move to a certain distance, the third magnetic attraction piece and the fourth magnetic attraction piece attract each other until attraction.

In this embodiment, the first magnetic attraction member is a closing magnet 203, and the second magnetic attraction member is a closing armature 204. Thus, the first magnetic attraction member is a magnet, and the second magnetic attraction member is an iron piece. When in actual use, the first magnetic attraction piece and the second magnetic attraction piece can be magnets, and the first magnetic attraction piece and the second magnetic attraction piece can be attracted to each other only after the first magnetic attraction piece and the second magnetic attraction piece are moved to a certain distance. In addition, the first magnetic attraction piece can also be an armature, and at the moment, the second magnetic attraction piece is a magnet, and only the first magnetic attraction piece and the second magnetic attraction piece can attract each other after the first magnetic attraction piece and the second magnetic attraction piece move to a certain distance. The device is flexible in actual operation, simple and convenient to arrange and install, reliable in working performance and sensitive in action.

In this embodiment, the third magnetic attraction member is a breaking magnet 205, and the fourth magnetic attraction member is a breaking armature 206. Thus, the third magnetic attraction member is a magnet, and the fourth magnetic attraction member is an iron piece. In actual use, the third magnetic attraction piece and the fourth magnetic attraction piece can be magnets, and the third magnetic attraction piece and the fourth magnetic attraction piece can be attracted to each other only after the third magnetic attraction piece and the fourth magnetic attraction piece are moved to a certain distance. In addition, the third magnetic attraction piece may be an armature (i.e., an iron sheet), and at this time, the fourth magnetic attraction piece is a magnet, and only the third magnetic attraction piece and the fourth magnetic attraction piece can attract each other after moving to a certain distance. The device is flexible in actual operation, simple and convenient to arrange and install, reliable in working performance and sensitive in action.

In actual installation, the small coating 201 and the closing magnet 203 are fastened and connected with the hand torsion bar 100 into a whole.

To further secure the use effect and to facilitate the installation, the closing magnet 203 is supported on the small film 201, and the breaking magnet 205 is supported on the large film 202.

In this embodiment, a through hole is formed in the middle of the closing armature 204 for the hand torsion bar 100 to pass through, and the closing armature 204 is installed in the upper installation hole.

In this embodiment, the small coating 201 is located directly below the large coating 202, the closing magnet 203 is located directly below the torsion bar 100, the closing armature 204 is located directly above the closing magnet 203, the push armature 104 of the delayed automatic closing member is located directly below the large coating 202, the closing magnet 203 is located directly above the small coating 201, the breaking magnet 205 is located directly above the large coating 202, and the breaking armature 206 is located directly above the breaking magnet 205. In actual use, the arrangement positions of the small coating 201, the large coating 202, the closing magnet 203, the breaking magnet 205, the closing armature 204 and the breaking armature 206 can be adjusted accordingly according to specific needs.

In actual installation, the lower end of the hand torsion bar 100 is fixedly connected with the small coating 201, and the hand torsion bar 100 is positioned right above the small coating 201. The hand torsion bar 100 passes through the middle of the closure armature 204.

As can be seen from the above description, a closing magnet 203 is disposed directly above the small film 201, the closing magnet 203 is located directly below the hand torsion bar 100 and is supported on the small film 201, a closing armature 204 is mounted in the upper mounting hole, and a through hole for the hand torsion bar 100 to pass through is formed in the middle of the closing armature 204; the small leather film 201 and the closing magnet 203 are fastened and connected with the hand torsion bar 100 into a whole; a breaking magnet 205 is arranged right above the large coating 202, and the breaking magnet 205 is supported on the large coating 202; a breaking armature 206 is disposed right above the breaking magnet 205, and the breaking armature 206 is mounted on the valve opening and closing assembly. In actual use, the closing magnet 203, the closing armature 204 and the small coating 201 are all coaxially arranged with the hand torsion bar 100. The closure armature 204 is fixedly mounted to the self-closing valve body.

In this embodiment, the gas self-closing valve is the closed object of the time-lapse auto-closing member.

In this embodiment, the delay automatic closing member is installed on the lower opening, and the delay automatic closing member is located below the self-closing valve body. The valve opening and closing assembly is a timing opening assembly which drives the movable shaft to move downwards through the reverse transmission mechanism in the process of opening the air inlet 3 or the air outlet 17. The air inlet 3 and the air outlet 17 are both communicated with the middle valve cavity.

In this embodiment, the housing 101 and the self-closing valve body are coaxially disposed. The housing 101 is located directly below the inner cavity of the self-closing valve body.

The housing 101 is located directly below the lower opening, and the housing 101 is located directly below the large film 202.

The middle part of the inner side of the self-closing valve body is provided with an annular groove for fixing the small diaphragm 201, and the peripheral edge of the large diaphragm 202 is fixed on the self-closing valve body through a lower annular limiting piece.

In this embodiment, the small diaphragm 201 is fixed on the self-closing valve body through an annular lower limiting member 207, and the annular lower limiting member 207 is located below the small diaphragm 201; the peripheral outer edges of the small leather membrane 201 are fastened and fixed between the annular lower limiting piece 207 and the self-closing valve body;

the large diaphragm 202 is fixed between the self-closing valve body and the housing 101 by pushing the armature 104.

In this embodiment, the self-closing valve body is a unitary valve body 302 that is machined as one piece. Therefore, the self-closing valve body is simple in structure and convenient to process and manufacture, and the lower valve body and the valve cover of the self-closing valve body are integrally processed and manufactured.

In actual use, the self-closing valve body can also be an assembled valve body comprising a lower valve body and a valve cover buckled on a valve opening formed on the lower valve body. The small diaphragm 201 is installed between the lower valve body and the valve cover, and the valve cover is located right above the housing 101.

In this embodiment, the air inlet 3 and the air outlet 17 are arranged on the same straight line.

And, the air inlet 3 and the air outlet 17 are disposed at the lower portion of the unitary valve body 302 (i.e., on the lower valve body).

In this embodiment, a lifting button 301 is further installed at the upper end of the torsion bar 100.

The valve opening and closing assembly comprises an opening and closing transmission mechanism and a vent plug for opening and closing the air inlet 3 and/or the air outlet 17.

In this embodiment, the vent plug is an air inlet plug that opens and closes the air inlet 3.

The opening and closing transmission mechanism is arranged in the middle valve cavity and is also called as a valve actuating mechanism. The snap armature 206 is mounted to the opening and closing transmission mechanism.

In actual use, the opening and closing transmission mechanism can be any valve actuating mechanism, especially the valve actuating mechanism adopted on the self-closing valve can be used as the opening and closing transmission mechanism, and the air inlet 3 can be opened or closed only through transmission. The opening and closing transmission is also called a switching transmission.

In this embodiment, the opening and closing transmission mechanism is a swing arm type opening and closing transmission mechanism 303.

The swing arm type opening and closing transmission mechanism 303 comprises a guide block 208 which is arranged in the middle valve cavity and can move up and down, and an upper swing arm 209 which can swing up and down and drive the vent plug to move left and right so as to open or close the air inlet 3, the guide block 208 is connected with the vent plug through the upper swing arm 209, and the upper swing arm 209 is connected with the guide block 208 and the vent plug in a hinged mode.

In this embodiment, the hinge member is a spherical hinge. The upper swing arm 209 may also be connected to the guide block 208 and the vent block by other types of hinges.

The vent plug includes a connecting rod having one end connected to the upper swing arm 209 in a hinged manner and a vent plug 210 disposed at the other end of the connecting rod. The inlet plug 210 is located inside the inlet 3 and outside the middle valve chamber. In practice, other sealing members such as sealing plates may be used for the vent sealing member.

In actual use, the upper portion of the guide block 208 is fixed at the bottom of the small coating 201, and a fixing plate for fixing the guide block 208 is arranged below the middle portion of the small coating 201. The snap armature 206 is fixed to the bottom of the guide block 208. The guide blocks 208 are disposed along the central axis of the hand torsion bar 100.

In this embodiment, the moving shaft and the hand torsion bar 100 are coaxially arranged, the guide block 208 is located between the moving shaft and the hand torsion bar 100, and the guide block 208 is located right below the hand torsion bar 100.

In this embodiment, the closing magnet 203 and the breaking magnet 205 are ring magnets, the closing magnet 203 is fixedly mounted on the middle part above the small membrane 201 through an upper fixing shaft, and the breaking magnet 205 is fixedly mounted on the middle part above the large membrane 201 through a lower fixing shaft. The closing magnet 203 and the breaking magnet 205 are both coaxially arranged with the hand torsion bar 100, and the closing magnet 203 and the breaking magnet 205 are both arranged in parallel and are both arranged perpendicular to the hand torsion bar 100. The middle part of the closing magnet 203 is provided with a mounting hole for mounting the upper fixing shaft, and the middle part of the breaking magnet 205 is provided with a mounting hole for mounting the lower fixing shaft.

The closing armature 204 and the snap armature 206 are both iron pieces. The breaking armature 206 is a circular armature and is fixed at the bottom of the guide block 208, and the breaking armature 206 is arranged perpendicular to the torsion bar 100 and parallel to the breaking magnet 205. The closing armature 204 includes a circular armature arranged parallel to the closing magnet 203 and a cylindrical armature fixed directly above the circular armature and coaxially mounted in the upper mounting hole, the circular armature is located directly below the upper mounting hole, and the closing armature 204 and the torsion bar 100 are coaxially arranged.

In this embodiment, the switch transmission mechanism is a transmission mechanism formed by an upper swing arm 209 and a guide block 208.

In this embodiment, the swing arm type opening/closing transmission mechanism 303 further includes a guide seat 210 for guiding the connecting rod, and the connecting rod is linearly moved left and right by the guide seat 210, so as to drive the vent plug to move left and right and open or close the air inlet 3.

The guide seat 210 is disposed in the middle valve cavity and is fixed on the inner sidewall of the self-closing valve body. In order to further improve the reliability of the motion, the swing arm type opening and closing transmission mechanism 303 further includes a lower swing arm 211 connected between the guide seat 210 and the guide block 208, the upper swing arm 209 and the lower swing arm 211 are both straight rods, the lower swing arm 211 is connected with the guide seat 210 and the guide block 208 in a hinged manner, and the lower swing arm 211 is located below the upper swing arm 209.

In this embodiment, the upper swing arm 209 is connected with the guide block 208 and the vent plug through upper hinge shafts, and hinge holes for installing the upper hinge shafts are formed in the connecting rods of the upper swing arm 209, the guide block 208 and the vent plug; the lower swing arm 211 is connected with the guide seat 210 and the guide block 208 in a hinged manner, and the lower swing arm 211, the guide seat 210 and the guide block 208 are provided with hinge holes for installing the lower hinge shaft.

Meanwhile, the swing arm type opening and closing transmission mechanism 303 further comprises a hinge base 212, the upper swing arm 209 and the vent plug piece and the lower swing arm 211 and the guide base 210 are connected through the hinge base 212, a hinge hole for installing the upper hinge shaft is formed in the upper portion of the hinge base 212, and a hinge hole for installing the lower hinge shaft is formed in the lower portion of the hinge base 212.

Before actual use, the manual force pushes down the hand torsion bar 100, at this time, the closing magnet 203 and the closing armature 204 are in a separated state, and the guide block 208 moves downward synchronously until the closing armature 204 at the upper end of the guide block is separated from the closing magnet 203; in the downward movement of the guide block 208, the vent plug piece fixed on the upper swing arm 209 is driven to move outwards (i.e. to the right), so that the air inlet plug 210 is separated from the air inlet 3, the valve is opened, and at the moment, air enters the valve body from the air inlet 3.

And, in the process of downward movement of the guide block 208, the plugging type moving member is pushed to move downward, and the moving plate of the plugging type moving member is pushed to the bottom of the inner side of the housing 101, so that the delay automatic closing member enters a delay closing state.

To ensure the downward pushing effect of the guide block 208, a lower pushing member is disposed at the bottom of the large coating 202.

In this embodiment, the bottom end of the lower fixing shaft extends below the large membrane 202, and the section of the bottom end of the lower fixing shaft extending below the large membrane 202 is the lower pushing member.

In order to ensure the fixing effect, the bottom end of the lower fixing shaft is locked and fixed through a fastening nut, and the fastening nut is positioned right below the large coating 202 and is coaxially sleeved on the lower fixing shaft.

During normal air supply, the normal air pressure in the middle valve cavity generates outward thrust to the small diaphragm 201 and the large diaphragm 202 (wherein the small diaphragm 201 bears upward thrust and the large diaphragm 202 bears downward thrust), and the thrust borne by the small diaphragm 201 is smaller than that borne by the large diaphragm 202, and the difference of the thrust borne by the normal air pressure in the middle valve cavity acting on the small diaphragm 201 and the large diaphragm 202 can overcome the attraction force between the closing armature 204 and the closing magnet 203, so that the closing armature 204 and the closing magnet 203 are always in a separated state, and the breaking magnet 205 and the breaking armature 206 are in an attraction state at the moment, so that the gas self-closing valve keeps an open state, and normal air supply is realized.

In the actual use process, when an abnormal condition occurs at one side of the air inlet 3, the gas self-closing valve can be normally closed, specifically, the valve is closed by closing the air inlet 3 (namely the vent sealing piece), and the following two aspects are mainly embodied:

firstly, when the pressure in the middle valve cavity (namely the pressure of the air inlet 3) is lower than a specified pressure value or is stopped, the outward thrust of the gas in the middle valve cavity acting on the small diaphragm 201 and the large diaphragm 202 is reduced or eliminated, so that the thrust difference of the gas in the middle valve cavity acting on the small diaphragm 201 and the large diaphragm 202 is reduced or eliminated correspondingly, the closing armature 204 and the closing magnet 203 are attracted, and the guide block 208 is driven to move upwards, so that the valve is closed;

second, when the pressure inside the middle valve cavity (i.e. the pressure of the air inlet 3) gradually or suddenly increases to the overpressure of the fuel gas, the outward thrust of the gas inside the middle valve cavity acting on the small diaphragm 201 and the large diaphragm 202 is increased, so that the breaking magnet 205 and the breaking armature 206 are separated, the closing armature 204 and the closing magnet 203 are attracted, and the guide block 208 is driven to move upwards, so that the valve is closed.

According to the above, when an abnormal condition occurs at one side of the air inlet 3, the double-flow double-control self-closing valve can normally close at one side of the air inlet 3, so that the gas pipeline is automatically closed.

When no abnormal condition occurs at one side of the air inlet 3, and when the time of normally supplying air to the time-delay closing of the time-delay automatic closing member is finished, the push rod 300 moves upwards and pushes the large diaphragm 202 to move upwards, an upper push rod 401 pushed by the push rod 300 is arranged in the middle of the large diaphragm 202, and the push rod 300 (namely a lower push rod) pushes the upper push rod 401 to move upwards synchronously with the large diaphragm 202 and enables the breaking magnet 205 and the breaking armature 206 to be attracted; after the breaking magnet 205 and the breaking armature 206 are attracted, the push rod 300 pushes the guide block to move upwards, and synchronously drives one end of the swing arm, which fixes the vent plug, to move inwards (i.e. in the closing direction) until the valve is closed.

In actual use, after the push rod 300 pushes the valve switch transmission mechanism to move a certain distance (about 2 mm) towards the closing direction, the distance between the closing armature 204 and the closing magnet 203 is reduced, and the geometric progression of the attraction force between the closing armature 204 and the closing magnet 203 is increased, so that the closing armature 204 and the closing magnet 203 are attracted, and the valve is closed.

In the actual use process, the switch transmission mechanism can also be other types of transmission mechanisms adopted in the existing self-closing valve, such as a wedge mechanism, a rocker arm assembly and the like. The upper part of the switch transmission mechanism is fixed at the bottom of the small leather membrane 201, and the breaking armature 206 is arranged at the bottom of the switch transmission mechanism.

During normal air supply, the thrust difference between the small diaphragm 201 and the large diaphragm 202 acted by normal air pressure in the middle valve cavity can overcome the attraction force between the closing armature 204 and the closing magnet 203, so that the closing armature 204 and the closing magnet 203 are in a separated state, the breaking magnet 205 and the breaking armature 206 are in an attraction state, and at the moment, only the attraction action of the breaking magnet 205 and the breaking armature 206 is required to drive the switch transmission mechanism to act and correspondingly drive the vent plug to move outwards so as to open the air inlet 3. When an abnormal condition occurs at one side of the air inlet 3, the breaking magnet 205 and the breaking armature 206 are separated, and the closing armature 204 and the closing magnet 203 are attracted, at this time, only the attraction action of the closing armature 204 and the closing magnet 203 is needed to drive the switch transmission mechanism to act and correspondingly drive the air vent blocking piece to move inwards, so that the air inlet 3 is closed.

In this embodiment, the structure, connection relationship and operation principle of the time-lapse automatic closing member are the same as those of embodiment 2.

Example 4

The gas self-closing valve with the timing closing function shown in fig. 5 comprises a self-closing valve body with an air inlet 3 and an air outlet 17, wherein a lower opening is formed in the bottom of the self-closing valve body, the outer side of the lower opening is provided with the time delay automatic closing member, and a shell 101 of the time delay automatic closing member is a plugging member for plugging the lower opening.

The valve opening and closing assembly in the self-closing valve body is in transmission connection with the movable shaft through a reverse transmission mechanism. The moving shaft is a lower push rod, specifically, the push rod 300 is a lower push rod. The gas self-closing valve is the closed object of the time-delay automatic closing member.

In this embodiment, the self-closing valve body and the housing 101 form a closed housing, and the two are fastened together.

When in actual use, the reverse transmission mechanism is a lever transmission structure, a gear transmission mechanism or a connecting rod transmission mechanism.

The moving shaft of the delay automatic closing member is a valve closing driving part which pushes the valve opening and closing assembly to close the air inlet 3 or the air outlet 17 after moving upwards, and the valve opening and closing assembly is a timing opening assembly which drives the moving shaft to move downwards through the reverse transmission mechanism in the process of opening the air inlet 3 or the air outlet 17.

It can be seen from the above description that, in this embodiment, the modification to the existing gas self-closing valve is very small, and by adding the reverse transmission mechanism, the delay automatic closing member and the existing various gas self-closing valves can be directly matched for use, and the existing gas self-closing valve can have a timing closing function only by starting the lower opening at the bottom of the valve body of the existing gas self-closing valve and installing the reverse transmission mechanism and the delay automatic closing member.

In this embodiment, the self-closing valve body includes the valve body that comprises valve gap 1 and the disk seat 2 butt-buckling of opening air inlet 3 and air outlet 17, install ripple rubber membrane 6 in the self-closing valve body, ripple rubber membrane 6 will the inner chamber of self-closing valve body is divided into two upper and lower cavitys and upper and lower cavity respectively, and the valve gap hole is opened by valve gap 1 middle part inserts hand torsion bar 100 lower extreme and ripple rubber membrane 6 fixed connection in the upper valve cavity, the valve is opened and is closed the subassembly and is opened or be closed to air inlet 3 that sets up in the lower valve cavity. The upper passage of the push rod 300 in the time-lapse automatic closing member communicates with the inside of the lower valve chamber.

As shown in fig. 5, in this embodiment, the valve opening and closing assembly includes an opening and closing transmission mechanism and a vent closure for opening and closing the air inlet 3 and/or the air outlet 17.

In this embodiment, the vent plug is an air inlet plug for opening and closing the air inlet 3.

The self-closing valve body is internally provided with a permanent magnet 4 fixedly arranged at the upper end of the switch transmission mechanism, a limiting armature 18 arranged at the middle part in the lower valve cavity and positioned right below the permanent magnet 4 and an upper armature 5 positioned right above the permanent magnet 4, and the upper armature 5 is fixed on the corrugated rubber film 6 and fixedly connected with the lower end of the hand torsion bar 100. The upper end of the opening and closing transmission mechanism (also called as a switch transmission mechanism) passes through the middle part of the limiting armature 18, a through hole for the upper end of the switch transmission mechanism to pass through is correspondingly formed in the middle part of the limiting armature 18, and the air inlet plugging piece is arranged at the lower end of the switch transmission mechanism; the upper armature 5, the permanent magnet 4 and the limiting armature 18 are matched, and the switch transmission mechanism drives the air inlet blocking piece to open or close the air inlet 3 under the matched action of the upper armature 5, the permanent magnet 4 and the limiting armature 18.

In this embodiment, the air inlet 3 is externally connected with a regular hexagonal pipe thread type air inlet connector 25, and the pipe thread type air inlet connector 25 and the valve seat 2 are integrally manufactured to form an air inlet channel. In addition, the air outlet 17 is externally connected with a manual angle valve 14 and is connected with a rubber hose of the gas cooker through a pagoda-shaped air outlet interface 16 arranged at the outer end of the air outlet. Two breathing holes 9 are further formed in the valve cover 1, and the two breathing holes 9 are symmetrically arranged. The hand torsion bar 100 is integrally manufactured with the upper armature 5 at the lower end of the hand torsion bar, the corrugated rubber film 6 is fixed above the upper armature 5 through the nut 8, namely, the upper armature 5 is positioned below the corrugated rubber film 6, and the pressing sheet 7 is arranged between the corrugated rubber film 6 and the nut 8 in a cushioning manner. Meanwhile, a lifting button 11 is also installed at the upper end of the torsion bar 100. The air inlet 3 is provided with a pipe thread type air inlet joint 25.

The switch transmission mechanism comprises a main control rod 29 which is arranged in the lower valve cavity and can move up and down and a positioning blocking rod 32 which moves left and right, a concave part 22 for the main control rod 29 to move up and down is correspondingly arranged at the bottom of the valve seat 2, and a limit table 31 is arranged at the inner side of the bottom of the valve seat 2 at the left side and the right side of the concave part 22.

In this embodiment, the limiting armature 18 is an armature with a convex cross section, and the limiting armature 18 is mounted on the limiting table 31 by a screw. The permanent magnet 4 is arranged at the upper end of the main control rod 29, the upper part of the main control rod 29 penetrates through the limiting armature 18, an inclined channel 27 is arranged at the middle part of the main control rod 29, and a reset spring 21 for resetting is arranged at the lower end of the main control rod 29. The inclined channel 27 is an inclined groove or an open inclined channel matched with the boss 26.

In this embodiment, the oblique channel 27 is an open oblique channel disposed in the middle of the main control rod 29, and a main control rod mounting hole for passing through the upper portion of the main control rod 29 is formed in the middle of the limit armature 18. The air inlet blocking piece is an air inlet plug 19 arranged at the front end of the positioning blocking rod 32, and in actual use, the air inlet blocking piece can also adopt other blocking pieces such as a sealing plate.

The rear part of the positioning blocking rod 32 is provided with a boss 26 matched with the inclined channel 27, and the air inlet plug 19 is a hemispherical rubber plug arranged outside a longitudinal gasket 28 at the end part of the positioning blocking rod 32. The positioning blocking rod 32 is installed on the limiting table 31, a groove for the positioning blocking rod 32 to move left and right is formed in the upper portion of the limiting table 31, the groove forms a channel for the positioning blocking rod 32 to move left and right, and the positioning blocking rod 32 can only move left and right along the channel.

Thus, in this embodiment, the switch transmission mechanism is a cam mechanism composed of a main control rod 29 and a positioning blocking rod 32.

In the actual use process, the switch transmission mechanism can also adopt other types of transmission mechanisms such as a rocker arm assembly and a connecting rod assembly.

For facilitating pushing, an upper push rod 401 is arranged at the bottom of the main control rod 29. The upper push rod 401 is in transmission connection with the lower push rod through the reverse transmission mechanism, and the upper push rod 401 and the lower push rod are arranged in parallel and are arranged right above the lower push rod.

During normal air supply, the hand torsion bar 100 is pulled up manually and exposed out of the green ring 12, at this time, the upper armature 5 and the permanent magnet 4 are in a suction state, and the main control rod 29 moves upwards under the action of magnetic force until the permanent magnet 4 at the upper end of the main control rod is sucked with the upper armature 5; in the process of upward movement of the main control rod 29, the boss 26 matched with the inclined channel 27 is correspondingly driven to move in the inclined channel 27, and the boss 26 correspondingly drives the positioning blocking rod 32 to move to the side far away from the air inlet 3, so that the air inlet plug 19 arranged on the positioning blocking rod 32 is separated from the air inlet 3, the valve is opened, and at the moment, air enters the valve body from the air inlet 3. A red ring 13 is arranged below the green ring 12.

And, in the process of manually pulling up the torsion bar 100 and moving the main control rod 29 upwards, the main control rod 29 pushes the push rod downwards through the reverse transmission mechanism, that is, pushes the plugging moving member to move downwards, and pushes the moving plate of the plugging moving member to the bottom of the inner side of the casing 101, so that the time-delay automatic closing member enters a time-delay closing state.

In the actual use process, when an abnormal condition occurs at one side of the air inlet 3, the gas self-closing valve can be normally closed, specifically, the valve is closed by closing the air inlet 3 (namely, the air inlet plugging piece), and the following two aspects are mainly embodied:

Firstly, when the pressure in the lower valve cavity (namely the pressure of the air inlet 3) gradually or suddenly increases to the overpressure of the fuel gas, the corrugated rubber film 6 is influenced by the pressure to drive the upper armature 5 to move upwards, and the upper and lower displacement travel of the main control rod 29 in the lower valve cavity is limited by the limit armature 18, so that the corrugated rubber film 6 moves upwards to separate the upper armature 5 from the permanent magnet 4 fixed at the upper end of the main control rod 29; at this time, the permanent magnet 4 and the limiting armature 18 are attracted by the magnetic force between the permanent magnet 4 and the limiting armature 18 below, so as to drive the main control rod 29 to move downwards. In this way, in the downward moving process of the main control rod 29, the boss 26 matched with the inclined channel 27 is correspondingly driven to move in the inclined channel 27, and then the boss 26 correspondingly drives the positioning blocking rod 32 to move towards the side close to the air inlet 3, so that the air inlet plug 19 seals the air inlet 3, the valve is closed from the air inlet 3, and the whole valve body is ensured to be in a locking state.

Second, when the pressure in the lower valve cavity (i.e. the pressure of the air inlet 3) is lower than the specified pressure value or the air is stopped, the upward acting force of the air in the lower valve cavity is smaller than the magnetic force between the permanent magnet 4 and the limiting armature 18 below the permanent magnet 4 because the pushing force of the air in the lower valve cavity to the corrugated rubber film 6 is weak or almost non-existent, so that the permanent magnet 4 and the limiting armature 18 are attracted, and the main control rod 29 is driven to move downwards. In this way, in the process of downward movement of the main control rod 29 (at this time, if the valve opening and closing assembly is in an open state, automatic reset of the valve opening and closing assembly can be simultaneously realized), the boss 26 matched with the inclined passage 27 is correspondingly driven to move in the inclined passage 27, and then the boss 26 correspondingly drives the positioning blocking rod 32 to move towards the side close to the air inlet 3, so that the air inlet plug 19 seals the air inlet 3, the valve is closed from the air inlet 3, and the whole valve body is ensured to be in a locking state.

From the above, when an abnormal condition occurs at one side of the air inlet 3, the gas self-closing valve can normally close at one side of the air inlet 3, so as to realize automatic closing of the gas pipeline.

When no abnormal condition occurs at one side of the air inlet 3, when the delayed closing time from normal air supply to the delayed automatic closing member is over, the push rod 300 (i.e. the lower push rod) moves upwards and drives the main control rod 29 to move downwards through the reverse transmission mechanism until the valve is closed, so that a valve timing closing function, also called valve delayed automatic closing, is realized.

In this embodiment, the reversing gear is a reversing gear 402, and the reversing gear is a gear reversing mechanism consisting of two 90 ° reversing gear boxes.

The reversing gear may be any other type of reversing gear, and only needs to meet the reversing gear requirement, even if the moving direction of the lower push rod is opposite to that of the upper push rod 401.

In actual use, the stroke of the lower push rod is c times of the stroke of the upper push rod 401. Where c is a constant and c=1.5 to 5. The moving direction of the lower push rod is opposite to that of the upper push rod 401, and the lower push rod and the upper push rod 401 are arranged in parallel and both move along the central axis of the lower push rod and the upper push rod. That is, when the upper push rod 401 moves downward and its movement displacement is d, the lower push rod moves upward and its movement displacement is c×d; when the upper push rod 401 moves upward and its movement displacement is d, the lower push rod moves downward and its movement displacement is c×d.

In this embodiment, the structure, connection relationship and operation principle of the time-lapse automatic closing member are the same as those of embodiment 1.

Example 5

As shown in fig. 6, in the present embodiment, the gas self-closing valve employed is different from embodiment 4 in that: the reverse transmission mechanism comprises two X-shaped reversing mechanisms which are arranged in parallel;

the X-shaped reversing mechanism comprises two reverse push rods 403 which are symmetrically distributed, wherein the two reverse push rods 403 are inclined straight rods and are distributed on the same vertical surface; the two reverse push rods 403 are connected through a fixed hinge shaft 404, a sliding block 405 is arranged at the upper end and the lower end of each reverse push rod 403, and the sliding block 405 is connected with the reverse push rods 403 through a hinge shaft 406; the sliding block 405 at the upper end of the reverse push rod 403 is installed in the guiding groove 417 formed at the bottom of the upper push rod 401, the sliding block 405 at the lower end of the reverse push rod 403 is installed in the guiding groove 417 formed at the top of the lower push rod, and the guiding groove 417 is a linear groove and is arranged on the same vertical surface with the reverse push rod 403. Both ends of the fixed hinge shaft 104 are fixedly installed in the self-closing valve body.

In actual use, when the upper push rod 401 moves upwards, the fixed hinge shaft 404 is fixed, so that the upper end of the reverse push rod 403 is driven to move upwards, the inclination angle of the reverse push rod 403 (which means the included angle between the reverse push rod 403 and the cross section of the lower push rod) is gradually increased, and meanwhile, the lower push rod is pushed to move downwards by the reverse push rod 403; correspondingly, when the lower push rod moves upwards, the lower end of the reverse push rod 403 is driven to move upwards, the inclination angle of the reverse push rod 403 is gradually reduced, and meanwhile, the upper push rod 401 is driven to move downwards through the reverse push rod 403, so that the purpose of reverse transmission is achieved.

In actual use, the mounting positions of the fixed hinge shaft 404 on the two opposite push rods 403 are adjusted up and down, so that the proportional relation between the stroke of the lower push rod and the stroke of the upper push rod 401 is correspondingly adjusted. In this embodiment, the stroke of the lower push rod is 1.5-5 times that of the upper push rod 401, and the moving directions of the lower push rod and the upper push rod 401 are the same and opposite.

In this embodiment, the structure, connection relationship and working principle of the rest of the gas self-closing valve are the same as those of embodiment 4.

In this embodiment, the structure, connection relationship and operation principle of the time-lapse automatic closing member are the same as those of embodiment 4.

Example 6

As shown in fig. 7, in the present embodiment, the gas self-closing valve employed is different from embodiment 4 in that: the reverse transmission mechanism comprises a plurality of gear reversing mechanisms which are distributed along the circumferential direction;

the gear reversing mechanisms are identical in structure and are uniformly distributed, and each gear reversing mechanism is distributed along the central axis direction of the lower push rod;

each gear reversing mechanism comprises an upper gear 407 and a lower gear 408 which is positioned below the upper gear 407 and meshed with the upper gear 407, and the rotation directions of the upper gear 407 and the lower gear 408 are opposite; a plurality of groups of upper pushing teeth 409 which are respectively meshed with the upper gear 407 are arranged on the outer side wall of the lower part of the upper push rod 401 along the circumferential direction; the upper outer sidewall of the lower push rod is provided with a plurality of sets of lower push teeth 410 respectively engaged with the lower gear 408 in the circumferential direction.

In actual use, when the upper push rod 401 moves upwards, the upper gear 407 is pushed to rotate, and the lower gear 408 is correspondingly driven to rotate, so as to drive the lower push rod to synchronously move downwards; correspondingly, when the lower push rod moves upwards, the lower gear 408 is pushed to rotate, and the upper gear 407 is correspondingly driven to rotate, so that the upper push rod 401 is driven to synchronously move downwards, and the purpose of reverse transmission is achieved.

Example 7

As shown in fig. 8, in the present embodiment, the gas self-closing valve employed is different from embodiment 4 in that: the reverse transmission mechanism comprises a cylindrical pushing sleeve 411 and a plurality of reversing gears 412 which are distributed along the circumferential direction;

the reversing gears 412 have the same structure and are uniformly distributed, and each reversing gear 412 is distributed along the central axis direction of the push rod; the cylindrical pushing sleeve 411 is arranged along the central axis direction of the lower push rod and is arranged at the top of the lower push rod;

The lower outer side wall of the upper push rod 401 is provided with a plurality of groups of inner pushing teeth 413 respectively meshed with the reversing gear 412 along the circumferential direction, and the inner side wall of the cylindrical pushing sleeve 411 is provided with a plurality of groups of outer pushing teeth 414 respectively meshed with the reversing gear 412 along the circumferential direction.

In actual use, when the upper push rod 401 moves upwards, the reversing gear 412 is pushed to rotate, and the lower push rod is correspondingly driven to synchronously move downwards; correspondingly, when the lower push rod moves upwards, the reversing gear 412 is pushed to rotate, and the upper push rod 401 is correspondingly driven to synchronously move downwards, so that the purpose of reverse transmission is achieved.

Example 8

As shown in fig. 9, in the present embodiment, the gas self-closing valve employed is different from embodiment 4 in that: the reverse transmission mechanism comprises a cylindrical pushing sleeve 411 and a plurality of straight telescopic rods 415 distributed along the circumferential direction;

the structures of the plurality of straight telescopic rods 415 are the same and are uniformly distributed, and each straight telescopic rod 415 is distributed along the central axis direction of the push rod; each of the straight telescopic rods 415 is gradually inclined outwards from top to bottom; the upper end of each flat telescopic rod 415 is mounted on the outer side of the push rod 401 in a hinged manner, and the lower end of each flat telescopic rod 415 is mounted on the inner side wall of the cylindrical pushing sleeve 411 in a hinged manner.

In actual use, when the upper push rod 401 moves upwards, the upper end of the straight telescopic rod 415 is pushed to move upwards, the inclination angle of the straight telescopic rod 415 is gradually increased, and meanwhile, the lower push rod is pushed to move downwards through the straight telescopic rod 415; correspondingly, when the lower push rod moves upwards, the lower end of the straight telescopic rod 415 is driven to move upwards, the inclination angle of the straight telescopic rod 415 is gradually reduced, and meanwhile, the upper push rod 401 is pushed to move downwards through the straight telescopic rod 415, so that the purpose of reverse transmission is achieved.

Example 9

As shown in fig. 5, in this embodiment, the structure, connection relationship and operation principle of the time-lapse automatic closing member employed are the same as those of embodiment 4.

In this embodiment, the gas self-closing valve employed is different from embodiment 4 in that: the reverse transmission mechanism is a reverse transmission coupling connected between the upper push rod 401 and the lower push rod.

In this embodiment, the structure, connection relationship and operation principle of the delay automatic closing member are the same as those of embodiment 4.

Example 10

As shown in fig. 10, in the present embodiment, the gas self-closing valve employed is different from embodiment 4 in that: the valve opening and closing assembly comprises a switch transmission mechanism, an air inlet plugging piece for opening and closing the air inlet 3, a permanent magnet 4 fixedly installed at the upper end of the switch transmission mechanism, a lower armature 15 installed in the middle of the lower valve cavity and located under the permanent magnet 4, and an upper armature 5 located right above the permanent magnet 4, wherein the upper armature 5 is fixed on a corrugated rubber film 6 and fixedly connected with the lower end of a hand torsion bar 100.

The upper end of the switch transmission mechanism passes through the middle part of the lower armature 15, a through hole for the upper end of the switch transmission mechanism to pass through is correspondingly formed in the middle part of the lower armature 15, and the air inlet plugging piece is arranged at the lower end of the switch transmission mechanism; the upper armature 5, the permanent magnet 4 and the lower armature 15 are matched, and the switch transmission mechanism drives the air inlet blocking piece to open or close the air inlet 3 under the matched action of the upper armature 5, the permanent magnet 4 and the lower armature 15.

In this embodiment, the air inlet 3 and the air outlet 17 are arranged on the same straight line, and the high-flow air outlet 201 is located between the air inlet 3 and the air outlet 17.

In the embodiment, a valve cover 1 and a valve seat 2 are fixed through bolts, and bolt mounting holes are formed in the peripheral edges of the valve cover 1 and the valve seat 2; the front end and the rear end of the valve seat 2 are respectively provided with an air inlet 3 and an air outlet 17. In addition, the air outlet 17 is externally connected with a manual angle valve 14.

In this embodiment, the hand torsion bar 100 is integrally formed with the upper armature 5 at the lower end thereof, and the corrugated rubber film 6 is fixed above the upper armature 5, i.e., the upper armature 5 is located below the corrugated rubber film 6. Meanwhile, a lifting button 11 is also installed at the upper end of the torsion bar 100.

In this embodiment, the opening and closing transmission mechanism includes a guide rod 33 disposed in the lower valve cavity and capable of moving up and down, and a rocker arm 34 capable of rotating up and down, and the rocker arm 34 is connected with the guide rod 33 in a hinged manner. At the same time, one end of the rocker arm 34 is connected with the valve seat 2 in an articulated manner. The other end of the rocker arm 34 is connected to the inlet block. An upper push rod 401 is installed at the bottom of the rocker arm 34, and the upper push rod 401 is located right above the push rod 300 of the time delay automatic closing member. The upper passage of the pushrod 300 communicates with the interior of the lower valve chamber.

For the convenience of connection, the rocker arm 34 is connected with the lower end of the guide rod 33 through a hinge.

In this embodiment, the hinge member is a spherical hinge. The rocker arm 34 and the guide bar 33 may also be connected by other types of hinges.

In this embodiment, one end of the rocker arm 34 is connected to the valve seat 2 through a rotating shaft 35, and the rotating shaft 35 is vertically arranged with the guide rod 33.

In practical use, one end of the rocker arm 34 may be connected to the valve seat 2 in other hinged manner, and only the rocker arm 34 may rotate up and down.

In this embodiment, the upper armature 5 and the lower armature 15 are both disposed perpendicular to the guide rod 33, and the upper armature 5 and the lower armature 15 are disposed parallel to each other. The upper armature 5 is located right above the guide rod 33, the guide rod 33 passes through the through hole in the middle of the lower armature 15 from bottom to top, the through hole is a through hole for the guide rod 33 to pass through, and the lower armature 15 is fixed on the rocker arm 34. The permanent magnet 4 is arranged at the upper end of the guide rod 33, the upper part of the guide rod 33 passes through the lower armature 15, and the lower part of the guide rod is hinged with the rocker arm 34. In actual use, the lower armature 15 may also be fixed to the valve seat 2.

The air inlet blocking piece is an air inlet plug 19 arranged at the other end of the rocker arm 34, and in actual use, the air inlet blocking piece can also adopt other blocking pieces such as a sealing plate. For convenient connection, the other end of the rocker arm 34 is provided with a connecting rod 36 for connecting with an air inlet plug 19, and the air inlet plug 19 is a hemispherical rubber plug at the end part of the connecting rod 36. Meanwhile, a guide seat 38 for guiding the connecting rod 36 to move the connecting rod 36 back and forth is further arranged at the bottom of the inner side of the valve seat 2.

In this embodiment, the switch transmission mechanism is a transmission mechanism composed of a rocker arm 34 and a guide rod 33. In the actual use process, the switch transmission mechanism can also be other types of transmission mechanisms adopted in the existing self-closing valve.

In actual arrangement and installation, the rocker arm 34 is arranged between the air inlet 3 and the air outlet 17.

In this embodiment, the rotating shaft 35 is disposed near the air outlet 17, and the pushing member is disposed near the air outlet 17.

When in actual use, the working process of the gas self-closing valve is as follows: the action of the guide rod 33 is mainly determined by three forces, namely the weight of the hand torsion bar 100, the guide rod 33 and its fittings themselves, the magnetic force of the permanent magnet 4 and the pressure of the gas entering the valve body from the gas inlet 3 in the lower valve chamber.

During normal air supply, the hand torsion bar 100 is pulled up manually, the upper armature 5 and the permanent magnet 4 are in an attracting state, and the guide rod 33 moves upwards under the action of magnetic force until the permanent magnet 4 at the upper end of the guide rod is attracted with the upper armature 5; and in the process of upward movement of the guide rod 33, the rocker arm 34 is correspondingly driven to rotate, one end of the rocker arm 34, which is used for fixing the air inlet plugging piece, is rotated to the side far away from the rotating shaft 36, so that the air inlet plugging piece 19 is driven to move to the side far away from the rotating shaft 36, the air inlet plugging piece 19 is separated from the air inlet 3, the valve is opened, and at the moment, air enters the valve body from the air inlet 3.

firstly, when the pressure in the lower valve cavity (i.e. the pressure of the air inlet 3) gradually or suddenly increases to the overpressure of the fuel gas, the corrugated rubber film 6 is influenced by the pressure to drive the upper armature 5 to move upwards, and because the up-down displacement stroke of the guide rod 33 in the lower valve cavity is limited by the lower armature 15 (also called a limit armature), the corrugated rubber film 6 moves upwards to separate the upper armature 5 from the permanent magnet 4 fixed at the upper end of the guide rod 33; at this time, the permanent magnet 4 and the lower armature 15 are attracted by the magnetic force between the permanent magnet 4 and the lower armature 15, so as to drive the guide rod 33 to move downward. In this way, in the downward moving process of the guide rod 33, the guide rod is correspondingly driven to drive the rocker arm 34 to rotate, one end of the rocker arm 34, which is fixedly provided with the pushing piece, is rotated upwards, and meanwhile, one end of the rocker arm 34, which is fixedly provided with the air inlet plugging piece, is rotated towards the side close to the rotating shaft 36, so that the air inlet plug 19 is driven to move towards the side close to the rotating shaft 36, the air inlet plug 19 is enabled to plug the air inlet 3, the valve is closed from the air inlet 3, and the whole valve body is guaranteed to be in a locking state.

Second, when the pressure inside the lower valve chamber (i.e., the pressure of the air inlet 3) is lower than a prescribed pressure value or the air is stopped, since the pushing force of the air inside the lower valve chamber to the corrugated rubber film 6 is weak or almost nonexistent, the upward force is smaller than the magnetic force between the permanent magnet 4 and the lower armature 15 therebelow, so that the permanent magnet 4 and the lower armature 15 are attracted to drive the guide rod 33 to move downward. Similarly, in the downward movement process of the guide rod 33, the rocker arm 34 is correspondingly driven to rotate, one end of the pushing piece fixed on the rocker arm 34 is enabled to rotate upwards, and meanwhile, one end of the air inlet plugging piece fixed on the rocker arm 34 is enabled to rotate towards the side close to the rotating shaft 36, so that the air inlet plug 19 is driven to move towards the side close to the rotating shaft 36, the air inlet plug 19 is enabled to seal the air inlet 3, the valve is closed from the air inlet 3, and the whole valve body is guaranteed to be in a locking state.

After the abnormal condition at one side of the air outlet 17 is solved, the double-flow double-control self-closing valve is manually closed, specifically, the manual operation hand torsion bar 100 is operated, namely, the manual operation hand torsion bar 100 is pressed upwards and downwards, so that the permanent magnet 4 is attracted with the lower armature 15, and meanwhile, the permanent magnet 4 is separated from the upper armature 5, at the moment, the valve is closed, and the excessive flow automatic closing member is automatically reset in the closing process of the valve. Then, the hand torsion bar 100 is manually operated, namely the hand torsion bar 100 is lifted upwards, so that the permanent magnet 4 is separated from the lower armature 15, and meanwhile, the permanent magnet 4 is attracted with the upper armature 5, at the moment, the valve is opened, and the user can use the air normally again.

Example 11

As shown in fig. 11, in the present embodiment, the gas self-closing valve employed is different from embodiment 4 in that: the valve opening and closing assembly is a rocker arm assembly 416. The rocker arm assembly 416 has an upper pushrod 401 disposed at the bottom thereof, the upper pushrod 401 being located directly above the pushrod 300 of the time delay automatic shutoff. The upper passage of the pushrod 300 communicates with the interior of the lower valve chamber.

The rocker arm assembly 416 can be adopted in the patent of patent number 200720032879.3, namely the automatic shutoff valve for pipeline gas ultra-low pressure and pipe removal, or the patent of patent number 200520079302.9, namely the valve for pipeline gas ultra-low pressure and pipe removal. In practice, the rocker arm assembly 416 may be any other type of rocker arm assembly, as long as the valve opening and closing actions are satisfied. Additionally, the rocker arm assembly 416 may also employ other types of valve opening and closing assemblies (also referred to as valve actuators) employed in existing gas self-closing valves.

The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A gas self-closing valve with timing closing function is characterized in that: the self-closing valve comprises a self-closing valve body with an air inlet (3) and an air outlet (17), wherein the bottom of the self-closing valve body is provided with a lower opening, a time-delay automatic closing member is arranged outside the lower opening, and a shell (101) of the time-delay automatic closing member is a plugging member for plugging the lower opening;

a small coating (201) is arranged in the self-closing valve body, a large coating (202) is arranged on the lower opening, and the small coating (201) is positioned above the large coating (202); the small diaphragm (201) divides the inner cavity of the self-closing valve body into an upper cavity and a lower cavity, the upper cavity and the lower cavity are respectively an upper valve cavity and a middle valve cavity, the push armature (104) of the time-delay automatic closing piece is positioned below the large diaphragm (202), and a cavity between the two cavities is a lower valve cavity;

The lower end of a hand torsion bar (100) inserted into the upper valve cavity through an upper mounting hole formed in the upper part of the self-closing valve body is fixedly connected with a small leather membrane (201), and a valve opening and closing assembly for opening or closing an air inlet (3) and/or an air outlet (17) is arranged in the middle valve cavity;

an upper magnetic adsorption assembly is arranged in the upper valve cavity and comprises a first magnetic adsorption piece arranged on a small leather membrane (201) and a second magnetic adsorption piece arranged on the upper part of the self-closing valve body, and the second magnetic adsorption piece is positioned above the first magnetic adsorption piece; a middle magnetic adsorption assembly is arranged in the middle valve cavity and comprises a third magnetic attraction piece arranged on the large leather membrane (202) and a fourth magnetic attraction piece positioned above the third magnetic attraction piece, and the fourth magnetic attraction piece is arranged on the valve opening and closing assembly;

the time delay automatic closing piece comprises a shell (101) with an opening at the upper part, a plugging moving piece which is arranged in the middle of the inner side of the shell (101) and can move up and down along the central axis of the shell (101), an upward moving driving piece which is arranged in the shell (101) and drives the plugging moving piece to move upwards, and a compression spring (102) which pushes the plugging moving piece to move upwards along the central axis of the shell (101), wherein the plugging moving piece, the upward moving driving piece and the compression spring (102) are all coaxially arranged with the shell (101);

The plugging type moving piece comprises a moving shaft and a moving plate, wherein the moving shaft is distributed along the central axis of the shell (101), the moving plate is coaxially and fixedly sleeved on the moving shaft and can move up and down along with the moving shaft, the moving plate is vertically distributed with the moving shaft, and an inner cavity of the shell (101) is divided into an upper cavity and a lower cavity which is positioned right below the upper cavity through the moving plate;

the compression spring (102) is positioned in the lower cavity and is supported between the bottom of the plugging moving piece and the bottom of the inner side of the shell (101);

the movable shaft comprises a pushing column (103), wherein a lower channel is arranged in the pushing column (103), is a channel for gas circulation, and is distributed along the central axis of the pushing column (103);

the movable shaft further comprises a push rod (300) arranged right above the push column (103), wherein the push rod (300) is coaxially connected with the push column (103) and is arranged along the central axis of the shell (101); an upper channel is arranged in the push rod (300), is distributed along the central axis of the shell (101) and forms an air passage with the lower channel, and the air passage is used for communicating the lower cavity with the outer side of the shell (101);

The upward movement driving piece comprises a pushing armature (104) for blocking an upper opening of the shell (101) and a pushing magnet (105) coaxially sleeved on the movable shaft and positioned right below the pushing armature (104), and the pushing armature (104) is positioned in the shell (101) and is arranged at the upper opening of the shell (101); the pushing armature (104) and the pushing magnet (105) are both positioned right above the moving plate;

the movable plate comprises an annular flat plate (106) coaxially and fixedly sleeved on the pushing column (103) and an annular blocking piece (107) for blocking an annular cavity between the shell (101) and the annular flat plate (106), and the annular blocking piece (107) is arranged on the outer side of the annular flat plate (106);

the pushing magnet (105) is coaxially sleeved on the pushing column (103).

2. The gas self-closing valve with a timing closing function according to claim 1, wherein: the self-closing valve body is an integral valve body.

3. The gas self-closing valve with a timing closing function according to claim 1 or 2, characterized in that: the size of the large coating (202) is larger than the size of the small coating (201).

4. The gas self-closing valve with a timing closing function according to claim 1 or 2, characterized in that: the first magnetic attraction piece is a closing magnet (203), and the small leather film (201) and the closing magnet (203) are both fixedly connected with the hand torsion bar (100) into a whole; the second magnetic attraction piece is a closed armature (204);

The third magnetic attraction piece is a breaking magnet (205), and the fourth magnetic attraction piece is a breaking armature (206).

5. The gas self-closing valve with a timing closing function according to claim 4, wherein: the closing magnet (203) is supported on the small coating (201), and the breaking magnet (205) is supported on the large coating (202); the middle part of the closing armature (204) is provided with a through hole for the hand torsion bar (100) to pass through, and the closing armature (204) is arranged in the upper mounting hole.

6. The gas self-closing valve with a timing closing function according to claim 4, wherein: the small leather membrane (201) is located under the large leather membrane (202), the closing magnet (203) is located under the hand torsion bar (100), the closing armature (204) is located under the closing magnet (203), the pushing armature (104) of the time-delay automatic closing member is located under the large leather membrane (202), the closing magnet (203) is located under the small leather membrane (201), the breaking magnet (205) is located under the large leather membrane (202), and the breaking armature (206) is located under the breaking magnet (205).

7. The gas self-closing valve with a timing closing function according to claim 1 or 2, characterized in that: the small leather membrane (201) is fixed on the self-closing valve body through an annular lower limiting piece (207), and the annular lower limiting piece (207) is positioned below the small leather membrane (201); the peripheral outer edges of the small leather film (201) are fastened and fixed between an annular lower limiting piece (207) and the self-closing valve body; the large diaphragm (202) is fixed between the self-closing valve body and the shell (101) by pushing the armature (104).

8. The gas self-closing valve with a timing closing function according to claim 1, wherein: the cross section of the inner cavity of the shell (101) is round or regular polygon, and the shape of the moving plate is the same as the cross section of the inner cavity of the shell (101).

9. The gas self-closing valve with a timing closing function according to claim 1, wherein: a plurality of air inlet channels are arranged in the lower channel, and the upper channel and the air inlet channels form an air inlet channel which communicates the lower cavity with the outer side of the shell (101); the lower channel is filled with a filler (108), and the air inlet channel is an air vent gap in the filler (108).

10. The gas self-closing valve with a timing closing function according to claim 1, wherein: a through hole for installing the movable shaft is formed in the middle of the pushing armature (104), and the through hole is a guide hole for guiding the movable shaft;

the movable shaft is coaxially arranged in the guide hole.

11. The gas self-closing valve with a timing closing function according to claim 1, wherein: the pushing armature (104) comprises a middle annular armature and an outer annular armature connected to the outer side of the upper part of the middle annular armature, and the middle annular armature is a circular flat armature and is vertically arranged with the moving shaft; the diameter of the outer annular armature is gradually reduced from top to bottom, the bottom of the outer annular armature is fixedly connected with the middle annular armature into a whole, and the bottom of the outer annular armature and the middle annular armature are arranged on the same plane.

12. The gas self-closing valve with a timing closing function according to claim 1, wherein: the push rod (300) and the pushing column (103) are both cylindrical, and the diameter of the push rod (300) is not larger than the diameter of the pushing column (103);

the bottom of the pushing column (103) extends out to the lower part of the moving plate, a limiting ring (109) is coaxially arranged on the outer side of the bottom of the pushing column (103), and the limiting ring (109) is arranged right below the moving plate; the moving plate is located between the limit ring (109) and the pushing magnet (105).

13. The gas self-closing valve with a timing closing function according to claim 1, wherein: the annular sealing piece (107) is an annular push plate which can be pushed up from bottom to top and enables the gas in the lower cavity to be discharged to the upper cavity.

14. The gas self-closing valve with a timing closing function according to claim 1, wherein: the annular blocking piece (107) is an annular rubber film.

15. The gas self-closing valve with a timing closing function according to claim 1, wherein: the pushing column (103) and the moving plate form a piston in the shell (101).

16. The utility model provides a gas self-closing valve with regularly close function, includes the self-closing valve body of taking air inlet (3) and gas outlet (17), its characterized in that: the bottom of the self-closing valve body is provided with a lower opening, a time-delay automatic closing member is arranged outside the lower opening, and a shell (101) of the time-delay automatic closing member is a plugging member for plugging the lower opening;

the valve opening and closing assembly in the self-closing valve body is in transmission connection with a push rod (300) of the time-delay automatic closing member through a reverse transmission mechanism;

the pushing magnet (105) is coaxially sleeved on the pushing column (103).

17. The gas self-closing valve with timing closure function according to claim 16, wherein: the self-closing valve body and the shell (101) form a closed shell, and the self-closing valve body and the shell are fixedly connected into a whole.

18. The gas self-closing valve with a timing closing function according to claim 16 or 17, characterized in that: the reverse transmission mechanism is a lever transmission structure, a gear transmission mechanism or a connecting rod transmission mechanism.

19. The gas self-closing valve with a timing closing function according to claim 16 or 17, characterized in that: the movable shaft of the delay automatic closing member is a valve closing driving part which pushes the valve opening and closing assembly to close the air inlet (3) or the air outlet (17) after moving upwards, and the valve opening and closing assembly is a timing opening assembly which drives the movable shaft to move downwards through the reverse transmission mechanism in the process of opening the air inlet (3) or the air outlet (17).

20. The gas self-closing valve with a timing closing function according to claim 16 or 17, characterized in that: the self-closing valve body comprises a valve body formed by a valve cover (1) and a valve seat (2) with an air inlet (3) and an air outlet (17), a corrugated rubber film (6) is arranged in the self-closing valve body, the inner cavity of the self-closing valve body is divided into an upper cavity and a lower cavity by the corrugated rubber film (6), the upper cavity and the lower cavity are respectively an upper valve cavity and a lower valve cavity, a valve cover hole formed in the middle of the valve cover (1) is inserted into the lower end of a hand torsion bar (100) in the upper valve cavity and fixedly connected with the corrugated rubber film (6), and a valve opening and closing assembly is an assembly which is arranged in the lower valve cavity and used for opening or closing the air inlet (3).

21. The gas self-closing valve with timing closure function according to claim 16, wherein: the cross section of the inner cavity of the shell (101) is round or regular polygon, and the shape of the moving plate is the same as the cross section of the inner cavity of the shell (101).

22. The gas self-closing valve with timing closure function according to claim 16, wherein: a plurality of air inlet channels are arranged in the lower channel, and the upper channel and the air inlet channels form an air inlet channel which communicates the lower cavity with the outer side of the shell (101); the lower channel is filled with a filler (108), and the air inlet channel is an air vent gap in the filler (108).

23. The gas self-closing valve with timing closure function according to claim 16, wherein: a through hole for installing the movable shaft is formed in the middle of the pushing armature (104), and the through hole is a guide hole for guiding the movable shaft;

the movable shaft is coaxially arranged in the guide hole.

24. The gas self-closing valve with timing closure function according to claim 16, wherein: the pushing armature (104) comprises a middle annular armature and an outer annular armature connected to the outer side of the upper part of the middle annular armature, and the middle annular armature is a circular flat armature and is vertically arranged with the moving shaft; the diameter of the outer annular armature is gradually reduced from top to bottom, the bottom of the outer annular armature is fixedly connected with the middle annular armature into a whole, and the bottom of the outer annular armature and the middle annular armature are arranged on the same plane.

25. The gas self-closing valve with timing closure function according to claim 16, wherein: the push rod (300) and the pushing column (103) are both cylindrical, and the diameter of the push rod (300) is not larger than the diameter of the pushing column (103);

26. The gas self-closing valve with timing closure function according to claim 16, wherein: the annular blocking piece (107) is an annular push plate which can be pushed up from bottom to top and enables the gas in the lower cavity to be discharged to the upper cavity;

the annular blocking piece (107) is an annular rubber film;

the pushing column (103) and the moving plate form a piston in the shell (101).