CN221003946U - Press type gas self-closing valve - Google Patents

Abstract

The embodiment of the utility model provides a push type gas self-closing valve, which comprises the following components: a valve body; a pressure balance assembly, a piston rod assembly and a pressing assembly are arranged in the valve body; the pressing component is in transmission connection with the piston rod component, and can drive the piston rod component to move in the valve body so as to open the valve body; the pressure balance component is used for moving along with the pressure change in the valve body; the pressure balance component and the pressing component are magnetically attracted, and when the pressure in the valve body is over-pressure or under-pressure, the pressing component drives the piston rod component to close the valve body; the pressure balance assembly is positioned below the pressing assembly and the piston rod assembly. The pressing type gas self-closing valve provided by the utility model adopts a pressing type opening mode, the pressing component and the piston rod component are directly driven, and the pressing component does not need to magnetically attract and drive the piston rod component through a magnet, so that the magnetic change of the magnet cannot influence whether the self-closing valve is manually opened or not.

Description

Press type gas self-closing valve

Technical Field

The utility model relates to the technical field of self-closing valves, in particular to a pressing type gas self-closing valve.

Background

The existing gas self-closing valve adopts a lifting and ventilating structure mode, the lifting part adopts a double lifting button, and the external lifting button is lifted during operation, so that the inner ring lifting button cap is driven to act, and the valve is opened and ventilated. The gas self-closing valve has the functions of overpressure and undervoltage closing, overcurrent automatic closing and the like, so that gas leakage is reduced and avoided to the greatest extent, and life safety and property loss of users are ensured. However, the existing gas self-closing adopts a mode of lifting and pulling the valve to manually open the self-closing valve, for example, the patent number is: CN202320357738.8, titled: in the patent of a gas self-closing valve, the gas self-closing valve comprises a valve body (1), a valve cover (2), a pull rod (3) and a sliding assembly, wherein a cavity is formed in the valve body (1), an air inlet hole (4) and an air outlet hole (5) are respectively formed at two ends of the valve body (1), the valve cover (2) is fixedly connected to the top of the valve body (1), a membrane (6) is clamped between the valve cover (2) and the valve body (1), the inner end of the pull rod (3) penetrates through the membrane (6) and is fixedly connected with the membrane (6), the outer end of the pull rod (3) extends out of the valve cover (2) and is fixedly connected with a pull cap (7), the sliding assembly comprises a sliding rod (8) and a sliding base (9), a sealing gasket (10) is fixedly connected to the outer end of the sliding rod (8), the gas self-closing valve is characterized in that the valve body (1) is provided with an integrally formed mounting seat (11), the mounting seat (11) is provided with a sliding groove (12) for the sliding rod (8) to penetrate and play a guiding role, the sliding rod (8) and the sliding seat (12) are circumferentially, the sliding rod (12) penetrates through the membrane (6) and is fixedly connected with the membrane (6), the sliding seat (14) and is fixedly connected with the top of the sliding seat (14), the top of the sliding base (9) penetrates out of the iron cover (14) and is fixedly connected with a magnet (15) which is magnetically attracted with the inner end of the pull rod (3), the inner end of the valve body (1) at the air inlet hole (4) is provided with a radially inwards protruding retaining shoulder (16) for sealing the sealing gasket (10), the side surface of the sliding base (9) facing the sliding rod (8) is provided with an inclined groove (17) which is obliquely arranged, and the sliding rod (8) is provided with a connecting rod (18) positioned in the inclined groove (17).

Therefore, in the county prior art, when the self-closing valve needs to be reset, the pull rod needs to be pulled upwards, the bottom end of the pull rod and the magnet are magnetically attracted, the magnet and the sliding block fixed with the magnet are driven to move upwards, the sliding block drives the sliding rod (8) to move leftwards through the chute, the sealing gasket (10) is driven to be separated from the inlet of the self-closing valve, and the gas self-closing valve is opened. However, in the prior art, along with the extension of the service time, the magnetism of the magnet can be weakened, and the tension of the magnet is lost and the tension between the magnet and the pull rod is insufficient to drive the sliding block to move, so that the sliding block can not drive the piston rod assembly to open the self-closing valve.

Disclosure of utility model

In order to solve the technical problems that in the prior art, the magnetic property of a magnet is weakened, so that the tension of the magnet is lost, and the tension between the magnet and a pull rod is insufficient to drive a sliding block to move, the sliding block cannot drive a piston rod assembly to open a self-closing valve, the utility model provides a pressing type gas self-closing valve, which comprises the following specific technical scheme:

The embodiment of the utility model provides a push type gas self-closing valve, which comprises the following components: a valve body;

a pressure balance assembly, a piston rod assembly and a pressing assembly are arranged in the valve body;

The pressing component is in transmission connection with the piston rod component, and the pressing component can drive the piston rod component to move in the valve body so as to open the valve body;

The pressure balance assembly is used for moving along with the pressure change in the valve body; the pressure balance component is magnetically attracted with the pressing component, and when the pressure in the valve body is over-pressure or under-pressure, the pressing component drives the piston rod component to close the valve body;

The pressure balance assembly is located below the pressing assembly and the piston rod assembly.

Optionally, the pressing assembly includes: the device comprises a pressing device, a driver, a sliding limiting block and a fixing plate;

The pressing device is movably arranged at the top of the valve body, the driver is positioned in the valve body, and the driver is arranged in the sliding limiting block in a sliding manner; the pressing device is positioned above the driver and is separated from the driver;

The piston rod assembly is in sliding connection with the sliding limiting block; the fixed plate is fixed at the bottom of the sliding limiting block; one end of the driver penetrates through the fixed plate and extends to the lower part of the fixed plate; the driver is in transmission connection with the piston rod assembly, and the driver can be pressed to drive the piston rod assembly to slide, so that the valve body is opened;

The bottom end of the driver is provided with a magnet; the magnet is magnetically attracted with the pressure balance assembly, and the magnet is magnetically attracted with the fixing plate.

Optionally, the presser includes: a gland, a pressing column and a spring;

The pressing column is fixed on the cover surface of the gland, and is in sliding fit with the valve body; the spring is sleeved on the side wall of the top of the valve body, one end of the spring is connected with the valve body, and the other end of the spring is abutted against the gland; the bottom of the pressing column penetrates through the top of the valve body and enters the valve body, and is used for pressing the top end of the driver so as to drive the driver to move, so that the valve body is opened;

And a sealing ring is arranged on the side wall of the pressing column and is used for sealing a gap between the pressing column and the valve body.

Optionally, the presser includes: the driver includes: a sliding block and a sliding rod;

The sliding block is arranged in the sliding limiting piece in a sliding mode, and a chute is formed in the sliding block; the side wall of the piston rod assembly is provided with a transmission block, the transmission block can slide in the chute, the sliding block slides downwards under the pressing of the pressing column to drive the transmission block to slide in the chute, and then the piston rod assembly is driven to move to open the valve body;

The bottom of slide bar runs through the fixed plate and extends to the below of fixed plate, magnet is fixed the bottom of slide bar.

Optionally, the piston rod assembly includes: a piston rod and a sealing head;

The piston rod penetrates through the sliding limiting piece and is in sliding fit with the sliding limiting piece;

The transmission block is fixed on the side wall of the piston rod; the sealing head is arranged at the end part of the piston rod; the sliding block slides downwards, and the chute on the sliding block drives the transmission block to slide in the chute, so that the piston rod is driven to move to open the valve body.

Optionally, the valve further comprises an overflow assembly, wherein the overflow assembly is arranged at the air inlet of the valve body.

Optionally, the pressure balancing assembly includes: a leather membrane, a valve cover and a magnetic attraction piece;

The leather membrane is positioned at the bottom of the valve body;

The valve cover is fixed at the bottom of the valve body and is used for sealing and fixing the leather film on the valve body; the leather membrane separates the inner space of the valve body to form a back pressure cavity and a valve cavity;

the magnetic attraction piece is fixed on the leather membrane and is used for magnetically attracting the magnet.

Optionally, a knob for controlling the on-off of the valve body is arranged at the air outlet end of the valve body.

The embodiment of the utility model provides a push type gas self-closing valve, which comprises the following components: a valve body; a pressure balance assembly, a piston rod assembly and a pressing assembly are arranged in the valve body; the pressing component is in transmission connection with the piston rod component, and the pressing component can drive the piston rod component to move in the valve body so as to open the valve body; the pressure balance assembly is used for moving along with the pressure change in the valve body; the pressure balance component is magnetically attracted with the pressing component, and when the pressure in the valve body is over-pressure or under-pressure, the pressing component drives the piston rod component to close the valve body; the pressure balance assembly is located below the pressing assembly and the piston rod assembly. According to the pressing type gas self-closing valve provided by the utility model, a pressing type opening mode is adopted, the pressing component and the piston rod component are directly driven, and the pressing component does not need to magnetically attract and drive the piston rod component through a magnet, so that the magnetic change of the magnet cannot influence whether the self-closing valve is manually opened or not, and the technical problem that the sliding block cannot drive the piston rod component to open the self-closing valve due to the fact that the pulling force between the pulling force of the magnet and the pulling rod is insufficient to drive the sliding block to move at present is solved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic structural diagram of a push-type gas self-closing valve according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram showing an open state of a pressing type gas self-closing valve according to an embodiment of the present utility model.

Reference numerals:

The valve comprises a valve body 1, a flow-through assembly 2, a piston rod 3, a gland 4, a spring 5, a pressing column 6, a sealing ring 7, a sliding block 8, a coating 9, a valve cover 10, a magnet 11, a fixed plate 12, a valve cavity 13, a back pressure cavity 14, a sliding limiting piece 15, a sealing head 16 and a knob 17.

Detailed Description

In order to make the above objects, features and advantages of the present utility model more comprehensible, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, an embodiment of the present utility model provides a push type gas self-closing valve, including: a valve body 1; a pressure balance assembly, a piston rod 3 assembly and a pressing assembly are arranged in the valve body 1; the pressing component is in transmission connection with the piston rod 3 component, and the pressing component can drive the piston rod 3 component to move in the valve body 1 so as to open the valve body 1; the pressure balance assembly is used for moving along with the pressure change in the valve body 1; the pressure balance component is magnetically attracted with the pressing component, and when the pressure in the valve body 1 is over-pressure or under-pressure, the pressing component drives the piston rod 3 component to close the valve body 1; the pressure balancing assembly is located below the pressing assembly and the piston rod 3 assembly.

In this embodiment, the valve body 1 may be divided into a back pressure chamber 14 and a valve cavity 13 by the pressure balancing assembly, and the pressure balancing assembly may move back and forth along with a difference in acting force between the back pressure chamber 14 and the valve cavity 13, and the pressure balancing assembly is in driving connection with the pressing assembly, specifically, just like a current connection mode in a self-closing valve: in the current self-closing valve, most of the self-closing valve adopts the magnet 11 to be matched with a magnetic attraction piece, when the gas pressure value in the valve cavity 13 is over-pressure or under-pressure, the distance between the magnetic attraction piece arranged on the pressure balance assembly and the magnet 11 on the pressing assembly is changed, at the moment, the magnetic attraction force of the magnet 11 is unbalanced, at the moment, the magnet 11 drives the pressing assembly to move, the pressing assembly drives the piston rod 3 assembly to move, and the piston rod 3 assembly realizes the opening or closing of a gas channel of the valve body 1.

Referring to fig. 1, the design point of the application is that a pressure balance component is arranged below a valve body 1, in the existing self-closing valve, a coating film 9 is usually arranged at the middle upper part of the valve body 1 of the self-closing valve, a magnet 11 is arranged at the bottom end of a valve rod, force balance is formed between the magnet 11 and a driving block, a sliding block 8 drives a piston rod 3 to slide, when the piston rod 3 needs to be reset, magnetic attraction is needed between the magnet 11 and the driving block, the sliding block 8 is driven by the magnetic attraction under the drive of the valve rod and synchronously moves, and the function of resetting the gas self-closing valve is realized. Compared with the prior art, such as the technical scheme in the background art, the technical scheme is that most of the fuel gas self-closing valves in the fuel gas self-closing valve field are used, the pressing component directly transmits the piston rod 3 component, and the magnetic attraction of the magnet 11 is not required to be weakened, so that the magnetic attraction of the sliding block 8 on the magnet 11 cannot be realized, and therefore, the improvement point of the scheme is that the pressing component directly transmits the piston rod 3 component, the transmission stability is ensured, and the defect that the magnetic property of the magnet 11 is weakened along with the extension of the service time, the tension between the magnet 11 and the pull rod is insufficient to drive the sliding block 8 to move, and the sliding block 8 cannot drive the piston rod 3 component to open the self-closing valve is overcome.

In one embodiment, the pressing assembly includes: a presser, a driver, a sliding stopper, and a fixing plate 12; the pressing device is movably arranged at the top of the valve body 1, the driver is positioned in the valve body 1, and the driver is arranged in the sliding limiting block in a sliding manner; the pressing device is positioned above the driver and is separated from the driver; the piston rod 3 assembly is in sliding connection with the sliding limiting block; the fixed plate 12 is fixed at the bottom of the sliding limiting block; one end of the driver penetrates through the fixed plate 12 and extends to the lower part of the fixed plate 12; the driver is in transmission connection with the piston rod 3 assembly, and the driver can be pressed to drive the piston rod 3 assembly to slide, so that the valve body 1 is opened; the bottom end of the driver is provided with a magnet 11; the magnet 11 magnetically attracts the pressure balance assembly, and the magnet 11 magnetically attracts the fixing plate 12.

In this embodiment, referring to fig. 1, a sliding limiting block may be fixed inside a valve body 1, and is used for providing a sliding channel for a piston rod 3 assembly and a driver, in the use process, the driver and the piston rod 3 assembly are arranged in the sliding limiting block in a staggered sliding manner, specifically, a through hole may be formed along one direction of the sliding limiting block, the piston rod 3 assembly is inserted into the through hole, a sliding hole communicated with the through hole is formed at a side edge of the through hole, the driver is arranged in the sliding hole in a sliding manner, a chute is formed in the driver, an oblique slider 8 is arranged on a side wall of the piston rod 3 assembly, and the oblique slider 8 is matched with the chute. In order to open or close the air inlet channel of the valve body 1 of the self-closing valve by utilizing the piston rod 3 assembly, a sealing head 16 needs to be arranged at the end part of the piston rod 3 assembly, at the moment, when the pressing device is pressed, the pressing device drives the driver to move downwards, the driver drives the inclined sliding block 8 to slide in the chute, and then the piston rod 3 assembly is driven to drive the sealing head 16 to be separated from the air inlet, so that the air inlet channel of the valve body 1 can be opened.

In the present embodiment, as shown in fig. 1, the presser is provided separately from the driver, specifically: the presser comprises: a gland 4, a pressing column 6 and a spring 5; the pressing column 6 is fixed on the cover surface of the gland 4, and the pressing column 6 is in sliding fit with the valve body 1; the spring 5 is sleeved on the top side wall of the valve body 1, one end of the spring 5 is connected with the valve body 1, and the other end of the spring is in abutting connection with the gland 4; the bottom of the pressing column 6 passes through the top of the valve body 1 and enters the interior of the valve body 1, and is used for pressing the top end of the driver so as to drive the driver to move, so as to be used for opening the valve body 1; a sealing ring 7 is arranged on the side wall of the pressing column 6, and the sealing ring 7 is used for sealing a gap between the pressing column 6 and the valve body 1.

In this embodiment, referring to fig. 1, the presser includes: the driver includes: a sliding block 8 and a sliding rod; the sliding block 8 is arranged in the sliding limiting piece 15 in a sliding manner, and a chute is formed in the sliding block 8; a transmission block is arranged on the side wall of the piston rod 3 assembly, the transmission block can slide in the chute, the sliding block 8 slides downwards under the pressing of the pressing column 6 to drive the transmission block to slide in the chute, and then the piston rod 3 assembly is driven to move to open the valve body 1; the bottom of the sliding rod penetrates through the fixing plate 12 and extends to the lower portion of the fixing plate 12, and the magnet 11 is fixed at the bottom of the sliding rod.

In this embodiment, the piston rod 3 assembly includes: a piston rod 3 and a sealing head 16; the piston rod 3 penetrates through the sliding limiting piece 15 and is in sliding fit with the sliding limiting piece 15; the transmission block is fixed on the side wall of the piston rod 3; the sealing head 16 is arranged at the end of the piston rod 3; the sliding block 8 slides downwards, and the chute on the sliding block 8 drives the transmission block to slide in the chute, so that the piston rod 3 is driven to move to open the valve body 1.

Further, referring to fig. 1, the valve further comprises an overflow assembly 2, and the overflow assembly 2 is arranged at the air inlet of the valve body 1. A knob 17 for controlling the on-off of the valve body 1 is arranged at the air outlet end of the valve body 1.

In this embodiment, the pressure balancing assembly includes: the leather membrane 9, the valve cover 10 and the magnetic attraction piece; the coating film 9 is positioned at the bottom of the valve body 1; the valve cover 10 is fixed at the bottom of the valve body 1 and is used for sealing and fixing the leather membrane 9 on the valve body 1; the diaphragm 9 divides the inner space of the valve body 1 to form a back pressure cavity 14 and a valve cavity 13; the magnetic attraction piece is fixed on the coating film 9 and is used for magnetically attracting the magnet 11.

In a specific embodiment, as shown in fig. 1, when rated working pressure is introduced into an inlet of a valve, the valve is in a closed state, a magnet 11 is attracted to a fixed plate 12, a pressing cover 4 is released after limiting, in the pressing process, the pressing cover 4 drives a pressing column 6 to move downwards, the pressing column 6 gradually approaches and abuts against the top surface of a sliding block 8, the pressing cover 4 is continuously pressed, the pressing column 6 pushes the sliding block 8 to move downwards, a chute is arranged on the sliding block 8, a transmission block is arranged on a piston rod 3, and the inclined sliding block 8 can slide in the chute; as shown in fig. 1, the sliding block 8 moves downwards under the pressing of the pressing post 6, the chute on the sliding block 8 drives the transmission block to slide in the chute, and the sliding of the sliding block 8 slides according to the limiting direction of the sliding limiting piece 15 as the sliding block 8 is limited by the sliding limiting piece 15, such as the vertical direction in fig. 1; the pressing of the pressing cover 4 is continued, the pressing column 6 continues to move downwards until the pressing cover 4 reaches the limit position, the chute on the sliding block 8 drives the transmission block to slide, the transmission block reaches the top of the chute, in the process, the piston rod 3 gradually slides to the left direction of fig. 1 under the drive of the transmission block, namely, in the application, the vertical motion of the sliding block 8 is converted into the horizontal motion of the piston rod 3, so that the piston rod 3 moves to the left, meanwhile, the magnet 11 on the sliding block 8 is attached to the magnetic attraction piece on the film 9, at the moment, the air inlet of the valve body 1 is opened, air pressure of the air inlet enters the valve cavity 13, under the action of the air pressure, the film 9 moves downwards to drive the magnet 11 magnetically attracted on the magnetic piece to synchronously move downwards, and under the air pressure stable state, the attraction force between the magnet 11 and the magnetic piece is larger than the attraction force of the upper end face of the magnet 11 to the fixed plate 12, see fig. 1, at the sealing head 16 is separated from the air inlet of the valve body 1 of the self-closing valve, and the valve is kept in the open state. After the valve is opened, the gland 4 is quickly reset under the action of the spring 5, so that a safe distance is reserved between the pressing column 6 and the sliding block 8.

When the pressure of the inlet is normal, the diaphragm is attracted with the magnetic attraction piece, the magnet is driven to move along with the change of the air pressure in the valve body by the action of the air pressure, when the inlet pressure is low, the acting force of the inlet air pressure on the diaphragm 9 is reduced, the diaphragm 9 and the magnet 11 magnetically attracted on the magnetic piece move upwards, at the moment, the distance between the magnet 11 and the fixed plate 12 is gradually reduced, and when the magnetic attraction force between the magnet 11 and the fixed plate 12 is larger than the pressure of the air acting on the diaphragm, the magnet 11 magnetically attracts with the bottom of the fixed plate 12, and at the moment, the magnet 11 drives the magnetic attraction piece and the diaphragm 9 to magnetically attract on the fixed plate 12; in the process of magnetically attracting the fixed plate 12 by the magnet 11, the sliding block 8 rises along with the magnetic attraction, the sliding block 8 drives the piston rod 3 to seal with the valve port, and the valve is closed.

When the pressure gland is pressed to open a gas channel of the self-closing valve, when the inlet pressure is normal, the diaphragm and the magnetic attraction piece attract, the diaphragm 9 drives the magnet 11 to move along with the change of the air pressure in the valve body under the action of the air pressure, when the inlet pressure is increased, the effective acting force of the gas on the diaphragm 9 is larger than the magnetic force between the upper end surface of the magnet 11 and the attraction surface of the diaphragm 9, the diaphragm 9 moves downwards under the action of the acting force, when the diaphragm 9 moves to the maximum limit of the sliding block 8, the magnet 11 at the bottom end of the sliding rod does not move downwards when reaching the limit position, and as the air pressure continues to increase, the magnet 11 is separated from the magnetic piece, the magnet 11 after separation is attracted back to the fixed plate 12, the sliding block 8 rises along with the rise to drive the piston rod 3 to be sealed on the valve port, and the valve is closed.

When the outlet flow of the valve is increased and is higher than a set value, the valve channel is throttled by the action of the overflow assembly 2 at the inlet end of the valve, the air pressure acting on the leather film 9 is rapidly reduced, the distance between the magnet 11 and the fixed plate 12 is gradually reduced, when the magnetic attraction force between the magnet 11 and the fixed plate 12 is greater than that between the magnet 11 and the magnetic attraction piece, the magnet 11 is separated from the magnetic attraction piece, then the magnet 11 is magnetically attracted on the fixed plate 12, and at the moment, the sliding block 8 is lifted up along with the magnetic attraction piece, so that the piston rod 3 assembly is driven to be sealed on the valve port, and the valve is closed.

After the valve is opened by adopting a pressing type opening mode, a safety distance is reserved between the pressing component and a sliding block 8 in the piston rod 3 component, which controls the piston rod 3 to open and close the valve, and the pressing component and the self-closing valve self-safety action component belong to a separated structure and are not directly connected, so that the integral safety function failure of the valve caused by the failure of a manual valve opening part is avoided.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (8)

1. A push type gas self-closing valve, characterized by comprising: a valve body (1);

A pressure balance assembly, a piston rod (3) assembly and a pressing assembly are arranged in the valve body (1);

The pressing component is in transmission connection with the piston rod (3) component, and the pressing component can drive the piston rod (3) component to move in the valve body (1) so as to open the valve body (1);

The pressure balance assembly is used for moving along with the pressure change in the valve body (1); the pressure balance component is magnetically attracted with the pressing component, and when the pressure in the valve body (1) is over-pressure or under-pressure, the pressing component drives the piston rod (3) component to close the valve body (1);

the pressure balancing assembly is located below the pressing assembly and the piston rod (3) assembly.

2. The push gas self-closing valve of claim 1, wherein the push assembly comprises: a presser, a driver, a sliding limiting block and a fixed plate (12);

the pressing device is movably arranged at the top of the valve body (1), the driver is positioned in the valve body (1), and the driver is arranged in the sliding limiting block in a sliding manner; the pressing device is positioned above the driver and is separated from the driver;

The piston rod (3) component is in sliding connection with the sliding limiting block; the fixed plate (12) is fixed at the bottom of the sliding limiting block; one end of the driver penetrates through the fixed plate (12) and extends to the lower part of the fixed plate (12); the driver is in transmission connection with the piston rod (3) component, and the driver can be pressed to drive the piston rod (3) component to slide, so that the valve body (1) is opened;

The bottom end of the driver is provided with a magnet (11); the magnet (11) is magnetically attracted to the pressure balancing component, and the magnet (11) is magnetically attracted to the fixing plate (12).

3. The push type gas self-closing valve according to claim 2, wherein the push type comprises: a gland (4), a pressing column (6) and a spring (5);

The pressing column (6) is fixed on the cover surface of the gland (4), and the pressing column (6) is in sliding fit with the valve body (1); the spring (5) is sleeved on the top side wall of the valve body (1), one end of the spring (5) is connected with the valve body (1), and the other end of the spring is in butt joint with the gland (4); the bottom of the pressing column (6) passes through the top of the valve body (1) and enters the interior of the valve body (1) to press the top end of the driver so as to drive the driver to move and be used for opening the valve body (1);

a sealing ring (7) is arranged on the side wall of the pressing column (6), and the sealing ring (7) is used for sealing a gap between the pressing column (6) and the valve body (1).

4. The push type gas self-closing valve as claimed in claim 3, wherein the driver comprises: a sliding block (8) and a sliding rod;

the sliding block (8) is arranged in the sliding limiting piece (15) in a sliding mode, and a chute is formed in the sliding block (8); a transmission block is arranged on the side wall of the piston rod (3) component, the transmission block can slide in the chute, the sliding block (8) slides downwards under the pressing of the pressing column (6) to drive the transmission block to slide in the chute, and then the piston rod (3) component is driven to move to open the valve body (1);

The bottom of the sliding rod penetrates through the fixing plate (12) and extends to the lower portion of the fixing plate (12), and the magnet (11) is fixed at the bottom of the sliding rod.

5. The push type gas self-closing valve according to claim 4, wherein the piston rod (3) assembly comprises: a piston rod (3) and a sealing head (16);

The piston rod (3) penetrates through the sliding limiting piece (15) and is in sliding fit with the sliding limiting piece (15);

The transmission block is fixed on the side wall of the piston rod (3); the sealing head (16) is arranged at the end part of the piston rod (3); the sliding block (8) slides downwards, and the chute on the sliding block (8) drives the transmission block to slide in the chute, so that the piston rod (3) is driven to move to open the valve body (1).

6. The push type gas self-closing valve according to claim 1, further comprising an over-flow assembly (2), wherein the over-flow assembly (2) is arranged at the gas inlet of the valve body (1).

7. The push gas self-closing valve of claim 5, wherein the pressure balancing assembly comprises: a leather membrane (9), a valve cover (10) and a magnetic attraction piece;

the coating film (9) is positioned at the bottom of the valve body (1);

The valve cover (10) is fixed at the bottom of the valve body (1) and is used for sealing and fixing the leather membrane (9) on the valve body (1); the diaphragm (9) divides the inner space of the valve body (1) to form a back pressure cavity (14) and a valve cavity (13);

The magnetic attraction piece is fixed on the coating film (9) and is used for magnetically attracting the magnet (11).

8. The push type gas self-closing valve according to claim 1, wherein a knob (17) for controlling the on-off of the valve body (1) is arranged at the gas outlet end of the valve body (1).