阅读说明：本技术 一种燃气自闭阀 (Gas self-closing valve ) 是由 黄丽梅 于 2021-06-03 设计创作，主要内容包括：本发明公开了一种燃气自闭阀,属于阀门领域,一种燃气自闭阀,包括阀体和阀盖,阀体和阀盖间夹接有密封膜,阀体两端分别设有进气口和出气口,进气口内滑动连接有导柱,导柱的一端固定有进气盖板,导柱的另一端固定有第一张紧弹簧,进气口等角度均分设有若干进气孔,导柱远离导柱的一端滑动套接有进气拉杆,进气拉杆与导柱相对的一侧间固定有第一复位弹簧,进气拉杆远离导柱的一端固定有第一自闭塞,出气口内滑动连接有出气拉杆,出气拉杆上固定有出气盖板,本发明能有效在超压或是流量过流时及时自闭阀门、安全性好,结构简单,操作便捷,具有市场前景,适合推广。(The invention discloses a gas self-closing valve, belonging to the valve field, comprising a valve body and a valve cover, wherein a sealing film is clamped between the valve body and the valve cover, the two ends of the valve body are respectively provided with an air inlet and an air outlet, the air inlet is connected with a guide pillar in a sliding way, one end of the guide pillar is fixed with an air inlet cover plate, the other end of the guide pillar is fixed with a first tensioning spring, the air inlet is equally provided with a plurality of air inlets at equal angles, one end of the guide pillar, far away from the guide pillar, is sleeved with an air inlet pull rod in a sliding way, a first return spring is fixed between the air inlet pull rod and one side of the guide pillar, opposite to the guide pillar, one end of the air inlet pull rod, far away from the guide pillar, is fixed with a first self-closing plug, the air outlet is connected with an air outlet pull rod in a sliding way, and an air outlet cover plate is fixed on the air outlet pull rod. Is suitable for popularization.)

1. The utility model provides a gas self-closing valve, includes valve body (1) and valve gap (11), its characterized in that: a sealing film (13) is clamped between the valve body (1) and the valve cover (11), an air inlet (2) and an air outlet (3) are respectively arranged at two ends of the valve body (1), a guide pillar (23) is connected in the air inlet (2) in a sliding manner, an air inlet cover plate (21) is fixed at one end of the guide pillar (23), a first tensioning spring (231) is fixed at the other end of the guide pillar (23), a plurality of air inlets (22) are uniformly distributed at equal angles of the air inlet (2), an air inlet pull rod (24) is sleeved at one end, far away from the guide pillar (23), of the guide pillar (23) in a sliding manner, a first reset spring (243) is fixed between one side, opposite to the guide pillar (23), of the air inlet pull rod (24), far away from the guide pillar (23), a first self-closing plug (241) is fixed at one end of the air inlet pull rod (24), and an air outlet pull rod (31) is connected in the air outlet (3) in a sliding manner, be fixed with out gas cover board (32) on pull rod (31) of giving vent to anger, the one end that gas cover board (32) was kept away from in pull rod (31) of giving vent to anger is fixed with second tensioning spring (33), sliding connection has button (4) on valve gap (11), the bottom mounting of button (4) has spline guide arm (41), valve body (1) inner bottom is equipped with base (14), seal membrane (13) are passed and extend to in base (14) to the bottom of spline guide arm (41), carousel (42) have been cup jointed on spline guide arm (41), be equipped with on carousel (42) with spline guide arm (41) assorted spline groove (421), the circumference side of carousel (42) is equipped with arc pull rod (44) that two rotational symmetries set up, the one end of arc pull rod (44) is rotated with carousel (42) through the pivot and is connected, the other end of arc pull rod (44) is rotated with air inlet pull rod (24)/give vent to anger pull rod (31) through the pivot, and a locking device which enables the spline guide rod (41) to move downwards, lock/move upwards and reset is arranged in the base (14).

2. A gas self-closing valve according to claim 1, wherein: locking device is including equalling divide stopper (411) of setting in spline guide arm (41) bottom equally to the angle, the bottom of spline guide arm (41) is cylindrical structure, be equipped with the recess corresponding with cylindrical structure on base (14), be equipped with in the recess with stopper (411) assorted spacing groove (141), spacing groove (141) are L type groove structure, be fixed with second reset spring (43) between spline guide arm (41) and recess, second reset spring (43) have the elasticity of ordering about spline guide arm (41) and keeping away from base (14).

3. A gas self-closing valve according to claim 1, wherein: a plurality of rubber blocks (211) are arranged on one side, opposite to the air inlet holes (22), of the air inlet cover plate (21), and the rubber blocks (211) are matched with the air inlet holes (22) one by one.

4. A gas self-closing valve according to claim 1, wherein: the first tensioning spring (231) has elastic force for driving the air inlet cover plate (21) to be close to the end face of the air inlet (2), the first return spring (243) has elastic force for driving the air inlet pull rod (24) to be far away from the guide post (23), and the second tensioning spring (33) has elastic force for driving the air outlet cover plate (32) to be close to the end face of the air outlet (3).

5. A gas self-closing valve according to claim 1, wherein: the outer diameter of the air inlet cover plate (21) is smaller than the inner diameter of the air inlet (2), the outer diameter of the first self-closing plug (241) is smaller than the inner diameter of the valve body (1), an air inlet channel (15) is arranged between the cavity of the valve cover (11) and the air inlet (2), an air channel (12) is arranged on the air inlet channel (15), the air channel (12) is an L-shaped air channel, the air channel (12) is arranged at equal angles, and a second self-closing plug (242) is arranged in the air inlet channel (15).

6. A gas self-closing valve according to claim 5, wherein: one end of the first self-closing plug (241) and one end of the air inlet channel (15) are of spherical convex structures, and the air inlet end surface of the air inlet channel (15) is of a spherical concave structure matched with the first self-closing plug (241).

7. A gas self-closing valve according to claim 5, wherein: the outer diameter of one end of the second self-closing plug (242) is equal to the inner diameter of the air inlet channel (15), the outer diameter of the other end of the second self-closing plug (242) is smaller than the inner diameter of the air inlet channel (15), and when the first self-closing plug (241) is abutted against the end face of the air inlet channel (15), the outer wall of the second self-closing plug (242) with the large outer diameter is overlapped with the output end of the air channel (12).

8. A gas self-closing valve according to claim 1, wherein: be equipped with air outlet channel (16) between valve gap (11) cavity and gas outlet (3), it equallys divide equally to be equipped with a plurality of through-holes (321) to go out gas apron (32) etc. angle, when air outlet cover board (32) and air outlet channel (16) laminate mutually, air outlet channel (16) and through-hole (321) are each other not communicated, and both a plurality of the circumference radius that through-hole (321) are constituteed is greater than air outlet channel (16) internal diameter.

9. A gas self-closing valve according to claim 1, wherein: the air inlet (2) is provided with an internal thread, and the air outlet (3) is provided with an external thread.

10. A gas self-closing valve according to claim 1, wherein: be equipped with anti-skidding line on button (4), valve gap (11) top is equipped with and accomodates the groove with button (4) assorted, accomodate the inslot coating and have the bright-colored coating of colour, under the gas steady voltage condition, the up end and the valve gap (11) up end parallel and level setting of button (4).

Technical Field

The invention relates to the field of valves, in particular to a gas self-closing valve.

Background

The fuel gas is used as clean energy with low consumption, high income, low pollution and high benefit, and is widely applied to daily production and life of people. The gas pipeline is put into the house, the medium-high pressure is regulated to the low pressure by a pressure regulator, and if the pressure regulator fails, safety accidents can be caused by the direct putting of the gas pipeline into the house due to overhigh or overlow pressure; the connecting pipe is connected with the stove by using a rubber pipe or a corrugated pipe, and the falling or the breakage of the connecting pipe can also cause safety accidents. In view of the above potential safety hazards in the use process of gas, it is usually necessary to install a safety valve, i.e. a self-closing valve, having the function of automatically cutting off the gas pipeline. The self-closing valve is installed on a gas system pipeline, and when the gas supply pressure of the pipeline is under-pressure, overpressure and abnormal flow, the self-closing valve can be automatically closed to ensure the safe use of gas without electricity or other external power.

However, the self-closing valve in the prior art has a complex internal structure, the action sensitivity of the plug is not high when the valve is closed, and meanwhile, the plug cannot follow the airflow direction when the gas is closed under low pressure or high pressure, the sealing performance is poor, the possibility of gas leakage exists, and the safe use of the gas is difficult to ensure, so that the safety performance of the self-closing valve is influenced, and therefore, the gas self-closing valve is provided to solve the problems.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a gas self-closing valve which can be designed by a valve body structure with a locking device, an air inlet cover plate, a guide post, an air inlet pull rod, an air outlet cover plate and a spline guide rod, when in use, when the gas pressure of an air inlet or an air outlet is smaller than the designed gas pressure, the air inlet cover plate and the air outlet cover plate respectively comprise an opening state under the action of a first tensioning spring and a second tensioning spring so that gas can normally pass through, when the gas pressure is too large, the air pressure can push the air inlet cover plate to overcome the elastic force of the first tensioning spring to move so that the air inlet cover plate is involuted with an air inlet, at the moment, the air inlet pull rod enables a first self-closing plug to be closed under the driving of the guide post, simultaneously, under the pushing of the air inlet pull rod and the arc pull rod, a rotary table rotates, at the moment, the spline guide rod synchronously rotates under the action of the spline groove so that the locking device is unlocked, the spline guide rod moves upwards to reset, so that the button protrudes, and similarly, the air pressure of the backflow of the air outlet is too high, the air outlet pull rod can be used for pushing the spline guide rod to move upwards to reset, and when the valve structure needs to be opened, the button can be pressed down and rotated to enable the locking device to complete the downward movement locking function.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A gas self-closing valve comprises a valve body and a valve cover, wherein a sealing film is clamped between the valve body and the valve cover, an air inlet and an air outlet are respectively arranged at two ends of the valve body, a guide pillar is connected in the air inlet in a sliding manner, an air inlet cover plate is fixed at one end of the guide pillar, a first tensioning spring is fixed at the other end of the guide pillar, a plurality of air inlets are uniformly distributed at equal angles in the air inlet, an air inlet pull rod is sleeved at one end, away from the guide pillar, of the guide pillar in a sliding manner, a first reset spring is fixed between one side, opposite to the guide pillar, of the air inlet pull rod, a first self-closing plug is fixed at one end, away from the guide pillar, of the air inlet pull rod, an air outlet pull rod is connected in the air outlet in a sliding manner, an air outlet cover plate is fixed on the air outlet pull rod, a second tensioning spring is fixed at one end, away from the air outlet cover plate, a button is connected in a sliding manner, and a spline guide rod is fixed at the bottom end of the button, the bottom end of the spline guide rod penetrates through the sealing film and extends into the base, the spline guide rod is sleeved with a rotary table, the rotary table is provided with a spline groove matched with the spline guide rod, the circumferential side of the rotary table is provided with two arc-shaped pull rods which are rotationally symmetrical, one end of each arc-shaped pull rod is rotationally connected with the rotary table through a rotating shaft, the other end of each arc-shaped pull rod is rotationally connected with an air inlet pull rod/an air outlet pull rod through the rotating shaft, the base is internally provided with a locking device which enables the spline guide rod to move downwards, lock and move upwards and reset, the scheme adopts the structural design of the valve body with the locking device, the air inlet cover plate, the guide pillar, the air inlet pull rod, the air outlet cover plate and the spline guide rod, and when the air pressure of gas at the air inlet or the air outlet is smaller than the design air pressure, the air inlet cover plate and the air outlet cover plate respectively comprise an opening state under the action of a first tensioning spring and a second tensioning spring, the gas can normally pass through, when the gas pressure is too high, the gas pressure can push the gas inlet cover plate to overcome the elastic force of the first tensioning spring to move, so that the gas inlet cover plate is closed with the gas inlet, the gas inlet pull rod is driven by the guide pillar to close the first self-closing plug, meanwhile, the air inlet pull rod and the arc-shaped pull rod are jointly pushed to push the rotary disc to rotate, the spline guide rod synchronously rotates under the action of the spline groove at the moment, so that the locking device is unlocked, the spline guide rod moves upwards to reset, the button protrudes, the gas pressure for gas outlet backflow is too high, the gas outlet pull rod can also be used for pushing the spline guide rod to move upwards to reset, and when a valve structure needs to be opened, the button can be pressed downwards and rotated to enable the locking device to complete the downward moving and locking functions.

Furthermore, the locking device comprises a limiting block which is equally divided and arranged at the bottom of the spline guide rod at equal angles, the bottom of the spline guide rod is of a cylindrical structure, a groove corresponding to the cylindrical structure is arranged on the base, a limiting groove matched with the limiting block is arranged in the groove, the limiting groove is of an L-shaped groove structure, a second reset spring is fixed between the spline guide rod and the groove, the second reset spring has elasticity for driving the spline guide rod to be away from the base, the spline guide rod is driven to move from the horizontal groove of the limiting groove to the vertical groove under the locking state by the structural design of the limiting groove of the L-shaped groove structure and the limiting block at the bottom of the spline guide rod, the spline guide rod is driven by the rotation of the turntable, the spline guide rod moves upwards along the vertical groove under the elastic action of the second reset spring at the moment, the button is driven to protrude, and the valve self-closing information is prompted to a user, when needing to reset, only need overcome second reset spring's elasticity and press the button, make the stopper move down along vertical groove, the rotary button this moment makes the stopper advance along the horizontal groove, reaches the purpose of locking, and in the rotary button, the carousel is followed rotatoryly, utilizes the arc pull rod to make the pull rod that admits air keep away from the displacement mutually with the pull rod of giving vent to anger, reaches the purpose of opening the valve.

Furthermore, one side that the air inlet apron is relative with the inlet port is equipped with a plurality of rubber blocks, rubber block and inlet port one-to-one phase-match, through the setting of rubber block, when making air inlet apron and inlet port laminating, the inlet port was plugged in to the rubber block, has promoted sealing performance.

Furthermore, the first tensioning spring has an elastic force for driving the air inlet cover plate to be close to the end face of the air inlet, the first return spring has an elastic force for driving the air inlet pull rod to be away from the guide post, the second tensioning spring has an elastic force for driving the air outlet cover plate to be close to the end face of the air outlet, and by means of the structural design of the first tensioning spring, the first return spring and the second tensioning spring, the design requirements of different air pressure overload self-closing can be met by the springs with different elastic forces, and the adaptability of the product is improved.

Furthermore, the outer diameter of the air inlet cover plate is smaller than the inner diameter of the air inlet, the outer diameter of the first self-closing plug is smaller than the inner diameter of the valve body, an air inlet channel is arranged between the valve cover cavity and the air inlet, an air channel is arranged on the air inlet channel, the air channel is an L-shaped air channel, a plurality of air channels are arranged in an equal angle and equally distributed mode, a second self-closing plug is arranged in the air inlet channel, and through the structural design of the first self-closing plug and the second self-closing plug, under the condition of normal air pressure, gas can flow into the air inlet channel or the air channel from the circumferential side of the first self-closing plug, so that double tightness is improved, meanwhile, the gas has a multi-channel inflow path, and blocking is avoided.

Furthermore, one end of the first self-closing plug and the air inlet channel is of a spherical convex surface structure, the air inlet end surface of the air inlet channel is of a spherical concave surface structure matched with the first self-closing plug, the first self-closing plug is more smooth through the structural design of the first self-closing plug of the spherical convex surface structure and the air inlet channel of the spherical concave surface structure, and meanwhile, the sealing performance is improved.

Furthermore, the outer diameter of one end of the second self-closing plug is equal to the inner diameter of the air inlet channel, the outer diameter of the other end of the second self-closing plug is smaller than the inner diameter of the air inlet channel, when the first self-closing plug is abutted against the end face of the air inlet channel, the outer wall of the large outer diameter of the second self-closing plug is overlapped with the output end of the air channel, through the structural design of the second self-closing plug, under the condition of normal air pressure, fuel gas can flow into the air inlet channel or the air channel from the circumferential side of the first self-closing plug and flow out from the side of the small radius of the second self-closing plug, and when the air pressure is overloaded, the first self-closing plug and the second self-closing plug synchronously displace, so that the air inlet channel and the air channel are closed simultaneously, and the use safety performance is improved.

Further, be equipped with the passageway of giving vent to anger between valve gap cavity and gas outlet, go out on the gas cover board the equidistance and divide and be equipped with a plurality of through-holes, when going out the gas cover board and giving vent to anger the passageway and laminating mutually, give vent to anger passageway and through-hole each other intercommunication, it is both a plurality of the circumference radius that the through-hole is constituteed is greater than the passageway internal diameter of giving vent to anger, through the gas cover board structural design that gives vent to anger that has the through-hole, when the gas outlet takes place gas reflux, when reflux pressure is greater than second tensioning spring elasticity (the safe reflux pressure of both designs), the atmospheric pressure of backward flow drives out the gas cover board and overcomes second tensioning spring elastic displacement, makes and goes out gas cover board and the passageway laminating of giving vent to anger the pull rod and takes place the displacement this moment, triggers the self-closing function, further promotes the security performance.

Furthermore, the gas inlet is provided with an internal thread, the gas outlet is provided with an external thread, and the gas self-closing valve can be quickly installed and disassembled through the structural design with the internal thread and the external thread, so that the use convenience is improved.

Further, be equipped with anti-skidding line on the button, the valve gap top be equipped with button assorted accomodate the groove, accomodate the inslot coating and have the bright-colored coating of colour, under the gas steady voltage condition, the up end and the valve gap up end parallel and level of button set up, through the groove structural design of accomodating that has the bright-colored coating of colour, make the button when popping out, can show the bright-colored coating of colour of accomodating the inslot, promoted warning function.

3. Advantageous effects

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

(1) when the gas pressure of a gas inlet or a gas outlet is smaller than the designed gas pressure, the gas inlet cover plate and the gas outlet cover plate respectively comprise an opening state under the action of a first tensioning spring and a second tensioning spring to enable the gas to normally pass through, when the gas pressure is too high, the gas pressure can push the gas inlet cover plate to move against the elastic force of the first tensioning spring to enable the gas inlet cover plate to be closed with the gas inlet, the gas inlet pull rod enables a first self-closing plug to be closed under the driving of the guide post, meanwhile, under the combined pushing of the gas inlet pull rod and the arc-shaped pull rod, the turntable rotates, at the moment, the spline guide rod synchronously rotates under the action of the spline groove to unlock the locking device, the spline guide rod moves upwards to reset, a button protrudes, and the gas pressure of gas outlet backflow is too high under the same reason, the valve structure can also be used for pushing the spline guide rod to move upwards for resetting by utilizing the air outlet pull rod, and when the valve structure needs to be opened, the button can be pressed down and rotated to enable the locking device to complete the function of moving downwards for locking.

(2) Through the structural design of the limiting groove of L type groove structure and the limiting block at the bottom of the spline guide rod, make the spline guide rod under the locking state, receive the rotary drive of carousel, drive the horizontal groove displacement of limiting groove to vertical groove from the limiting groove of limiting groove, the spline guide rod shifts up along vertical groove by the elastic force of second reset spring this moment, drive the button protrusion, for the user suggestion valve self-closing information, when needing to reset, only need to overcome the elasticity of second reset spring and press down the button, make the limiting block shift down along vertical groove, rotating button this moment, make the limiting block advance along the horizontal groove, reach the purpose of locking, in rotating button, the carousel is followed rotatoryly, utilize the arc pull rod to make the pull rod that admits air keep away from the displacement mutually with the pull rod that gives vent to anger, reach the mesh of opening the valve.

(3) Through the setting of rubber piece, when making air inlet cover plate and inlet port laminating, the inlet port was filled in to the rubber piece, has promoted sealing performance.

(4) By means of the structural design of the first tensioning spring, the first return spring and the second tensioning spring, the spring with different elastic forces can meet the design requirements of overload self-closing of different air pressures, and the adaptability of the product is improved.

(5) Through the structural design of the first self-closing plug and the second self-closing plug, under the condition of normal air pressure, fuel gas can flow into the air inlet channel or the air channel from the circumferential side of the first self-closing plug, double tightness is improved, meanwhile, the gas has a multi-channel inflow path, and blockage is avoided.

(6) Through the structural design of the first self-closing plug of the spherical convex structure and the air inlet channel of the spherical concave structure, the first self-closing plug can be smoothly closed, and meanwhile, the sealing performance is improved.

(7) Through the structural design of the second self-closing plug, under the condition of normal air pressure, fuel gas can flow into the air inlet channel or the air channel from the circumferential side of the first self-closing plug and flow out from the side of the second self-closing plug with the small radius, and when the air pressure is overloaded, the first self-closing plug and the second self-closing plug synchronously displace, so that the air inlet channel and the air channel are simultaneously closed, and the use safety performance is improved.

(8) Through the design of the gas outlet cover plate structure with the through hole, when gas backflow occurs at the gas outlet, and the backflow gas pressure is larger than the elastic force of the second tensioning spring (the designed safe backflow gas pressure), the backflow gas pressure drives the gas outlet cover plate to overcome the elastic force displacement of the second tensioning spring, so that the gas outlet cover plate is attached to the gas outlet channel, the gas outlet pull rod is displaced at the moment, the self-closing function is triggered, and the safety performance is further improved.

(9) Through the structural design with internal threads and external threads, the gas self-closing valve can be quickly installed and detached, and the use convenience is improved.

(10) Through the storage groove structural design who has the bright-colored coating of colour, make the button when popping out, can show the bright-colored coating of colour of storing the inslot, promoted warning function.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is an enlarged view of the portion A of FIG. 3;

FIG. 5 is a schematic view of the internal structure of the air inlet proposed in the present invention;

FIG. 6 is a schematic view of the internal structure of the air outlet proposed in the present invention;

FIG. 7 is a schematic diagram of an explosion structure of the turntable and the arc-shaped pull rod according to the present invention;

FIG. 8 is a schematic view of the intake rod and its components proposed in the present invention;

FIG. 9 is a schematic structural diagram of the air outlet pull rod and its components proposed in the present invention;

fig. 10 is a schematic structural view of a limiting groove provided in the present invention.

The reference numbers in the figures illustrate:

the air valve comprises a valve body 1, a valve cover 11, an air channel 12, a sealing film 13, a base 14, an air inlet channel 15, an air outlet channel 16, a limiting groove 141, an air inlet 2, an air inlet cover plate 21, a rubber block 211, an air inlet 22, a guide post 23, a first tensioning spring 231, an air inlet pull rod 24, a first self-closing plug 241, a second self-closing plug 242, a first return spring 243, an air outlet 3, an air outlet pull rod 31, an air outlet cover plate 32, a through hole 321, a second tensioning spring 33, a button 4, a spline guide rod 41, a limiting block 411, a rotary disc 42, a spline groove 421, a second return spring 43 and an arc-shaped pull rod 44.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-10, a gas self-closing valve includes a valve body 1 and a valve cover 11, a sealing film 13 is clamped between the valve body 1 and the valve cover 11, an air inlet 2 and an air outlet 3 are respectively disposed at two ends of the valve body 1, a guide post 23 is slidably connected in the air inlet 2, an air inlet cover plate 21 is fixed at one end of the guide post 23, a first tensioning spring 231 is fixed at the other end of the guide post 23, a plurality of air inlets 22 are equally and angularly disposed at the air inlet 2, an air inlet pull rod 24 is slidably sleeved at one end of the guide post 23 away from the guide post 23, a first return spring 243 is fixed between the air inlet pull rod 24 and one side of the guide post 23 opposite to the air inlet pull rod 24, a first self-closing plug 241 is fixed at one end of the air inlet pull rod 24 away from the guide post 23, an air outlet pull rod 31 is slidably connected in the air outlet 3, an air outlet cover plate 32 is fixed at one end of the air outlet pull rod 31 away from the air outlet cover plate 32, a second tensioning spring 33 is fixed at one end of the air outlet pull rod 31, a button 4 is slidably connected on the valve cover 11, a spline guide rod 41 is fixed at the bottom end of the button 4, a base 14 is arranged at the inner bottom of the valve body 1, the bottom end of the spline guide rod 41 penetrates through the sealing film 13 and extends into the base 14, a rotary table 42 is sleeved on the spline guide rod 41, a spline groove 421 matched with the spline guide rod 41 is arranged on the rotary table 42, two arc-shaped pull rods 44 which are rotationally symmetrical are arranged on the circumferential side of the rotary table 42, one end of each arc-shaped pull rod 44 is rotationally connected with the rotary table 42 through a rotating shaft, the other end of each arc-shaped pull rod 44 is rotationally connected with the air inlet pull rod 24/air outlet pull rod 31 through a rotating shaft, and a locking device which enables the spline guide rod 41 to move downwards, lock/move upwards and reset is arranged in the base 14.

Referring to fig. 4, 7 and 10, the locking device includes a stopper 411 equally disposed at the bottom of the spline guide rod 41 at equal angles, the bottom of the spline guide rod 41 is a cylindrical structure, a groove corresponding to the cylindrical structure is disposed on the base 14, a stopper groove 141 matching with the stopper 411 is disposed in the groove, the stopper groove 141 is an L-shaped groove structure, a second return spring 43 is fixed between the spline guide rod 41 and the groove, the second return spring 43 has an elastic force for driving the spline guide rod 41 to move away from the base 14, the spline guide rod 41 is driven by the rotation of the turntable 42 in a locking state through the structural design of the stopper groove 141 of the L-shaped groove structure and the stopper 411 at the bottom of the spline guide rod 41, the stopper 411 is driven to move from the horizontal groove of the stopper groove 141 to the vertical groove, at this time, the spline guide rod 41 moves up along the vertical groove under the elastic force of the second return spring 43 to drive the protrusion of the button 4, for the user suggestion valve self-imposed information, when needing to reset, only need overcome second reset spring 43's elasticity and press button 4, make stopper 411 move down along vertical groove, rotary button 4 this moment makes stopper 411 advance along the horizontal groove, reaches the purpose of locking, and in rotary button 4, carousel 42 follows the rotation, utilizes arc pull rod 44 to make air inlet pull rod 24 and the pull rod 31 of giving vent to anger keep away from the displacement mutually, reaches the purpose of opening the valve.

Referring to fig. 2 and 8, a plurality of rubber blocks 211 are arranged on one side of the air intake cover plate 21 opposite to the air intake hole 22, the rubber blocks 211 are matched with the air intake hole 22 one by one, and when the air intake cover plate 21 is attached to the air intake hole 22 through the arrangement of the rubber blocks 211, the rubber blocks 211 are plugged into the air intake hole 22, so that the sealing performance is improved.

Referring to fig. 2 and 5, the outer diameter of the air inlet cover plate 21 is smaller than the inner diameter of the air inlet 2, the outer diameter of the first self-closing plug 241 is smaller than the inner diameter of the valve body 1, an air inlet channel 15 is arranged between the cavity of the valve cover 11 and the air inlet 2, an air channel 12 is arranged on the air inlet channel 15, the air channel 12 is an L-shaped air channel, a plurality of air channels 12 are equally distributed at equal angles, a second self-closing plug 242 is arranged in the air inlet channel 15, through the structural design of the first self-closing plug 241 and the second self-closing plug 242, under the normal air pressure condition, the gas can flow into the air inlet channel 15 or the air channel 12 from the circumferential side of the first self-closing plug 241, so that the gas has a multi-channel inflow path and avoids blockage, referring to fig. 3 and 6, one end of the first self-closing plug 241 and the air inlet channel 15 is a spherical concave structure matched with the first self-closing plug 241, through the structural design of the first self-closing plug 241 with the spherical convex surface structure and the air inlet channel 15 with the spherical concave surface structure, the first self-closing plug 241 can be closed more smoothly, and meanwhile, the sealing performance is improved.

Referring to fig. 2, the outer diameter of one end of the second self-closing plug 242 is equal to the inner diameter of the air inlet channel 15, the outer diameter of the other end of the second self-closing plug 242 is smaller than the inner diameter of the air inlet channel 15, when the first self-closing plug 241 abuts against the end surface of the air inlet channel 15, the outer wall of the second self-closing plug 242 with the large outer diameter coincides with the output end of the air channel 12, through the structural design of the second self-closing plug 242, under the normal air pressure condition, the gas can flow into the air inlet channel 15 or the air channel 12 from the circumferential side of the first self-closing plug 241 and flow out from the small radius side of the second self-closing plug 242, when the air pressure is overloaded, the first self-closing plug 241 and the second self-closing plug 242 synchronously displace to close the air inlet channel 15 and the air channel 12 simultaneously, thereby improving the safety performance in use, referring to fig. 2, the air outlet channel 16 is provided between the chamber of the valve cover 11 and the air outlet 3, a plurality of through holes 321 are provided at equal angles on the air outlet cover 32, and when the air outlet cover 32 is attached to the air outlet channel 16, the air outlet channel 16 is not communicated with the through holes 321, namely, the radius of the circumference formed by the through holes 321 is larger than the inner diameter of the air outlet channel 16, through the structural design of the air outlet cover plate 32 with the through holes 321, when the air outlet 3 generates air backflow, and the backflow air pressure is larger than the elastic force of the second tensioning spring 33 (namely, the designed safe backflow air pressure), the backflow air pressure drives the air outlet cover plate 32 to overcome the elastic force displacement of the second tensioning spring 33, so that the air outlet cover plate 32 is attached to the air outlet channel 16, at the moment, the air outlet pull rod 31 displaces, the self-closing function is triggered, and the safety performance is further improved.

Please refer to fig. 1, air inlet 2 is equipped with the internal thread, gas outlet 3 is equipped with the external screw thread, through having the internal thread, the structural design of external screw thread, make gas self-closing valve install the dismantlement fast, the use convenience has been promoted, please refer to fig. 3, be equipped with anti-skidding line on the button 4, valve gap 11 top is equipped with and accomodates the groove with button 4 assorted, it has the bright-colored coating of colour to accomodate the inslot coating, under the gas steady voltage condition, the up end and the 11 up end parallel and level of valve gap of button 4 set up, through the groove structural design of accomodating that has the bright-colored coating of colour, make button 4 when popping out, can show the bright-colored coating of colour of accomodating the inslot, warning function has been promoted.

According to the scheme, through the structural design of the valve body 1 with the locking device, the air inlet cover plate 21, the guide post 23, the air inlet pull rod 24, the air outlet pull rod 31, the air outlet cover plate 32 and the spline guide rod 41, when the air pressure of gas at the air inlet 2 or the air outlet 3 is smaller than the designed air pressure, the air inlet cover plate 21 and the air outlet cover plate 32 respectively comprise an opening state under the action of the first tensioning spring 231 and the second tensioning spring 33, so that the gas can normally pass through, when the gas pressure is too high, the air pressure can push the air inlet cover plate 21 to overcome the elastic force of the first tensioning spring 231 to move, so that the air inlet cover plate 21 is involutory with the air inlet 22, at the moment, the air inlet pull rod 24 is driven by the guide post 23 to close the first self-closing plug 241, and simultaneously, under the simultaneous pushing of the air inlet pull rod 24 and the arc pull rod 44, the rotary disc 42 rotates, at the moment, the spline guide rod 41 rotates synchronously under the action of the spline groove 421 to unlock the locking device, the spline guide rod 41 moves upwards to reset, so that the button 4 protrudes, and similarly, the air pressure of the backflow of the air outlet 3 is too large, the air outlet pull rod 31 can be used for pushing the spline guide rod 41 to move upwards to reset, and when the valve structure needs to be opened, the button 4 can be pressed down and rotated to enable the locking device to complete the downward movement locking function.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.