CN219796229U - Gas self-closing valve - Google Patents

Abstract

The utility model provides a gas self-closing valve, and belongs to the technical field of gas. It has solved the inconvenient problem of equipment. The valve comprises a valve body, a push rod assembly, a support and a valve core, wherein the push rod assembly is arranged in a sliding manner along the left-right direction, the support is vertically provided with a slot, the valve core is positioned in the slot, the left side of the support is hinged with a transmission arm with a first arm body and a second arm body, the right end of the push rod assembly is provided with a socket, the end part of the first arm body is inserted into a lower port of the socket, the valve core is provided with a matching groove, the second arm body penetrates through the left side of the support to the matching groove to enable the valve core to drive the transmission arm to swing so as to drive the push rod assembly to move when the valve core moves, the groove width of the matching groove is gradually increased from the middle position to the left end notch and the right end notch respectively, the upper side groove wall of the matching groove is provided with two inclined planes I, the distance between the two inclined planes I is gradually reduced from top to bottom, and the valve core bottom forms a block part positioned between the left end notch and the right end notch of the matching groove in the matching groove. It has the advantages of convenient assembly, high production efficiency, etc.

Description

Gas self-closing valve

Technical Field

The utility model belongs to the technical field of fuel gas, and relates to a fuel gas self-closing valve.

Background

The fuel gas is widely used at present, and has the characteristics of inflammability, explosiveness, poisoning and the like, so that important safety accidents are easy to cause if leakage occurs, and the fuel gas entering the burner needs to be ensured to be kept at normal pressure, so that the burner can burn fully and stably. At present, a gas self-closing valve is arranged in front of the burner, so that the valve is automatically closed when in overpressure or under pressure, and gas leakage is prevented.

For example, the patent application number 202023250593.7 discloses a pipeline gas self-closing valve, it includes valve body, elastic diaphragm, valve core subassembly and the ejector pin that the front end has the seal head, the ejector pin left and right sliding assembly is on the admission line of valve body, the valve core subassembly includes valve core support and the columnar valve core of upper and lower sliding assembly in the valve core support, the upper end of valve core stretches out the valve core support and is fixed with permanent magnet, upper and lower armature is equipped with correspondingly to the upper and lower below of permanent magnet, the valve core support main part is the cylinder that has the valve core pilot hole in, have the side ear on the lateral surface of valve core support, it has the transmission crank arm to articulate on the side ear, the transmission crank arm has two transmission arms that are the splayed to arrange, the free end of first transmission wall stretches into in the transmission jack of valve core lower extreme and forms the slider and shakes the structure, the free end of second transmission arm stretches into in the transmission jack of ejector pin rear end and forms the slider rocker structure, the valve core reciprocates and drives the ejector pin through the transmission crank arm and moves about. The valve core moves up and down and drives the ejector rod to move left and right through the transmission crank arm, so that the gas self-closing valve is opened or closed.

Because the structure of the ejector rod assembly cannot be assembled with the bracket together and then installed in the valve body (because one end of the ejector rod assembly is large and the other end is small), the ejector rod assembly and the bracket can only be installed in the valve body separately and then matched, and the bottom of the valve core is completely closed, so that the valve core cannot be installed in the bracket if the transmission crank arm is installed first (because the bottom of the valve core is closed, if the transmission crank arm is installed first, the bottom of the valve core can collide with the transmission crank arm and cannot be installed in the bracket and matched with the transmission crank arm). For this purpose, the actual assembly steps of the gas self-closing valve are: firstly, vertically installing a valve core into a bracket, then installing a transmission crank arm on a side lug of the bracket in a mode that a first transmission arm can pass through a transmission jack on the valve core along the left-right direction to form a hinge, then placing the bracket, which is connected with the valve core and the transmission crank arm, into a valve body, and finally installing a push rod assembly into the valve body. However, when the valve core is in a lower position after the bracket is put into the valve body, the second transmission arm of the transmission crank arm is tilted upwards and is higher than the transmission jack on the ejector rod assembly, and at the moment, an assembling person is required to lift the valve core by one hand while putting the ejector rod assembly into the valve body, so that the end part of the second transmission arm is in a lower position, and the end part of the first transmission arm can be matched with the transmission jack, so that the assembling mode is obviously very inconvenient.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides a gas self-closing valve which solves the problem of inconvenient assembly.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a gas self-closing valve, includes the valve body, along the direction slip setting in the valve body about be used for realizing that gas self-closing valve opens or closes the ejector pin subassembly, link firmly in the valve body and along the vertical support that is equipped with the slot and be located the case of slot, support left side protrusion be provided with the ear seat, the articulated drive arm that has first arm body and second arm body on the ear seat, the right-hand member of ejector pin subassembly has along vertical setting's socket, the tip of first arm body inserts in the lower port of socket, the case is equipped with the cooperation groove along controlling the direction, the second arm body passes support left side and to the cooperation inslot when making the case move can drive the drive arm and swing around the pin joint and drive ejector pin subassembly and remove, its characterized in that, the groove width of cooperation groove from its intermediate position respectively left and right sides notch increase gradually, the upper side groove wall of cooperation groove has two inclined planes one, the distance between two inclined planes one reduces gradually from top to bottom the cooperation groove runs through the partial diapire of case, the case bottom forms the cubic portion that is located the cooperation inslot between the left and right sides block portion of cooperation groove, when the upward movement of arm body can lean on the lower side of second arm body to lean on the lower side of the case.

When the assembly is carried out, the transmission arm is hinged on the lug seat of the support, then the support is placed into the valve body by taking the side of the lug seat as the left side, then the ejector rod assembly is placed into the valve body by taking the end of the jack as the right end along the left-right direction, and then the assembly personnel adjusts the jack position on the ejector rod assembly and dials the transmission arm to enable the end part of the first arm body to be inserted into the jack. Then, the valve core is directly put into the slot from top to bottom, as the slot width of the matching slot is gradually increased from the middle position to the left and right end slots respectively, the matching slot penetrates through part of the bottom wall of the valve core, the bottom of the valve core forms a block part positioned between the left and right end slots of the matching slot in the matching slot, that is to say, the left and right sides of the bottom of the valve core are empty, and only the middle is provided with a solid part, so that the end part of the second arm body of the transmission arm can directly enter the matching slot positioned at the left side of the block part without being influenced by the bottom wall of the valve core when the valve core is put into the slot through the partially empty position. Then, the inclined surface at the part of the matching groove is contacted with the end part of the second arm body and generates thrust force to the second arm body in the process that the valve core continuously penetrates into the slot, so that the second arm body can swing downwards in a manner of matching the penetration of the valve core in the slot, and finally penetrates between the block part and the upper side groove wall of the matching groove.

Through the arrangement, the gas self-closing valve can be assembled in a mode of firstly installing the support, then installing the ejector rod assembly (and enabling the ejector rod assembly to be matched with the first arm body of the transmission arm) and finally installing the valve core, and in the process of reinstalling the valve core, only the transmission arm is required to be slightly adjusted, so that the second arm body is positioned at a position which is met by the bottom wall (i.e. the position which is not penetrated by the matching groove) of the valve core when the valve core is placed in the slot, and therefore the assembly difficulty is greatly reduced, and the production efficiency is improved.

In the above gas self-closing valve, the upper surface of the block part is a plane, the upper side groove wall of the matching groove is also provided with an action surface connected between the lower ends of the two inclined surfaces, and the action surface is opposite to the upper surface of the block part.

When the valve core moves upwards, the upper surface of the block part is contacted with the lower side of the second arm body and pushes the second arm body to swing upwards, so that the first arm body swings downwards and pushes the ejector rod assembly to move leftwards. When the valve core moves downwards, the acting surface contacts with the upper side of the second arm body and pushes the second arm body to swing downwards, so that the first arm body swings upwards and pushes the ejector rod assembly to move rightwards. The upper surface of the block-shaped part is set to be a plane, and the upper side groove wall of the matching groove is also set to be an action surface connected between the lower ends of the two inclined surfaces, so that the contact area between the second arm body and the matching groove can be increased, and the matching is more stable.

In the above gas self-closing valve, the left and right sides of the block portion have two inclined surfaces respectively, and the distance between the two inclined surfaces gradually increases from top to bottom.

As mentioned above, in the process of loading the valve core into the slot, the second arm body of the transmission arm firstly penetrates through the bottom wall of the valve core part from the matching groove to enter the matching groove, then the second arm body is pushed by the inclined surface I in the process of moving down along with the valve core to swing around the hinging point, and finally the second arm body passes through the space between the upper surface of the block part and the acting surface. Through set up inclined plane two respectively in the left and right sides of cubic portion, the distance between two inclined planes two increases from top to bottom gradually, and left inclined plane two can step down for the second arm body when rocking along with the promotion of inclined plane one, makes it pass between cubic portion upper surface and the action face relatively easily at last. In addition, when the valve core moves up and down to work, the two inclined planes II can also give way for the second arm body, so that clamping stagnation between the second arm body and the valve core can not occur.

In the gas self-closing valve, the notches at the left end and the right end of the matching groove are symmetrically distributed about the block-shaped part.

The notches at the left end and the right end of the matching groove are symmetrically distributed about the block part, so that the valve core can be inserted into the matching groove to form matching no matter which notch faces to the left side when being placed into the slot. By the arrangement, the assembly convenience of the fuel gas self-closing valve is further improved.

In the gas self-closing valve, the left side of the bracket is provided with a yielding groove communicated with the slot in a penetrating way, the second arm body penetrates through the yielding groove, the yielding groove is in a strip shape vertically arranged, and the yielding groove penetrates through the top of the bracket.

The groove of stepping down has formed the groove of stepping down for the swing of second arm body, and will step down the groove and set up to run through the top of support, make the transmission arm can carry out the swing of bigger angle when the equipment like this, especially provide bigger facility for the installation ejector pin subassembly.

In the gas self-closing valve, the lug seat is higher than the bottom surface of the bracket, the valve body is internally provided with the notch and the notch groove laterally communicated with the upper port of the notch, the bottom of the bracket is positioned in the notch, and the lug seat part is positioned in the notch groove.

The support is directly arranged in the valve body in a mode that the lug seat is aligned with the notch groove, so that the relative angle of the support does not need to be excessively adjusted in the subsequent assembly process, and the convenience of assembly is further improved.

Compared with the prior art, the gas self-closing valve can be assembled in a mode of firstly installing the support, then installing the ejector rod assembly (and enabling the ejector rod assembly to be matched with the first arm body of the transmission arm) and finally installing the valve core, and in the process of reinstalling the valve core, only the transmission arm needs to be slightly adjusted to enable the second arm body to be located at a position which is met by the bottom wall (i.e. the position which is not penetrated by the matched groove) of the valve core when the valve core is placed in the slot, so that the assembly difficulty is greatly reduced, and the production efficiency is improved.

Drawings

Fig. 1 is a cross-sectional view of the present gas self-closing valve.

Fig. 2 is an enlarged view of a portion of the ram assembly, bracket and spool of fig. 1.

Fig. 3 is a schematic plan view of the inside of the valve body of the gas self-closing valve.

Fig. 4 is a cross-sectional view taken along A-A in fig. 3.

FIG. 5 is an exploded view of the ejector assembly, bracket and spool.

Fig. 6 is a schematic structural view of the valve body.

FIG. 7 is a schematic cross-sectional view of the valve cartridge just after the carrier assembly and bracket are assembled.

In the figure, 1, a valve body; 1a, an air inlet hole; 1b, passing through the air cavity; 1c, air outlet holes; 1d, a transition hole; 1e, notch; 1f, a notch groove; 2. a valve cover; 3. a membrane; 4. a push rod assembly; 4a, a rod body; 4a1, a socket; 4b, a sealing gasket; 5. a bracket; 5a, a slot; 5b, ear seats; 5c, a yielding groove; 5d, lugs; 6. a transmission arm; 6a, a first arm body; 6b, a second arm body; 7. a pin shaft; 8. a valve core; 8a, a matching groove; 8a1, inclined plane I; 8a2, action surface; 8b, a block; 8b1, inclined surface II; 8c, columnar portions; 9. iron sheet; 10. a magnet; 11. a valve stem; 12. a lifting button; 13. and (5) a screw.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1-6, a gas self-closing valve comprises a valve body 1, a valve cover 2 and a diaphragm 3, wherein the valve body 1 is sequentially provided with an air inlet hole 1a, an air passing cavity 1b and an air outlet hole 1c from left to right, the air passing cavity 1b penetrates through the upper side surface of the valve body 1, the diaphragm 3 is abutted against the opening part of the air passing cavity 1b, the valve cover 2 is fixedly connected outside the valve body 1 where the opening part of the air passing cavity 1b is located, and the edge of the diaphragm 3 is fixed between the valve body 1 and the valve cover 2. The valve body 1 is internally provided with a push rod assembly 4 for realizing opening or closing of the fuel gas self-closing valve in a sliding manner along the left-right direction, a transition hole 1d is formed between the air inlet hole 1a and the air passing cavity 1b in the valve body 1, the transition hole 1d and the air inlet hole 1a are arranged at the same center line, the aperture of the air inlet hole 1a is larger than that of the transition hole 1d, the push rod assembly 4 comprises a rod body 4a with the left end positioned in the air inlet hole 1a and the right end extending into the air passing cavity 1b through the transition hole 1d, and a sealing gasket 4b fixedly connected to the left end of the rod body 4a, and when the push rod assembly 4 moves towards the right, the sealing gasket 4b can prop against the surface where the left end hole of the transition hole 1d is located to close the transition hole 1 d. The valve body 1 is also fixedly connected with a bracket 5, the bracket 5 is vertically provided with a slot 5a penetrating through the top of the bracket, and a valve core 8 capable of moving up and down is arranged in the slot 5 a. The left side protrusion of support 5 is provided with ear seat 5b, has articulated drive arm 6 through round pin axle 7 on the ear seat 5b, and drive arm 6 has first arm body 6a and second arm body 6b, and the body of rod 4a right-hand member portion of ejector pin subassembly 4 has along the socket 4a1 of vertical setting, and in the lower port of socket 4a1 was inserted to the tip of first arm body 6a, in fact, the tip of first arm body 6a was spherically. The valve core 8 is provided with a matching groove 8a along the left-right direction, and the second arm body 6b passes through the left side of the bracket 5 and stretches into the matching groove 8a, so that the driving arm 6 can be driven to swing around the hinge point to drive the ejector rod assembly 4 to move when the valve core 8 moves. The length of the hinge point between the matching position of the second arm body 6b and the valve core 8 and the transmission arm 6 is longer than that between the end part of the first arm body 6a and the transmission arm 6, so that a labor-saving lever is formed, and the valve core 8 can easily drive the ejector rod assembly 4 to move by means of the transmission arm 6 when moving. The valve body 1 is fixedly connected with an iron sheet 9, the iron sheet 9 is abutted against the upper end slot of the slot 5a, a through hole is formed in the iron sheet 9, the upper end of the valve core 8 is provided with a columnar part 8c extending out of the through hole, the upper end part of the columnar part 8c is fixedly connected with a magnet 10, and when the valve core 8 is positioned at the lower part of the slot 5a, the magnet 10 is adsorbed on the iron sheet 9 to keep the valve core 8 motionless, so that the ejector rod assembly 4 is kept in a state that the transition hole 1d is blocked by the sealing gasket 4 b. The center of the diaphragm 3 is fixedly connected with a valve rod 11, the valve rod 11 extends out of the valve cover 2 and is connected with a lifting button 12, and the valve rod 11 is made of steel materials so that the lower end of the valve rod can be adsorbed with the magnet 10.

When the gas self-closing valve is in a closed state, the transition hole 1d is blocked by the sealing gasket 4b of the ejector rod assembly 4, the magnet 10 is adsorbed on the iron sheet 9 to enable the valve core 8 to be in a low position, and meanwhile, the lower end of the valve rod 11 is adsorbed on the magnet 10. When the air is supplied in the pipeline, a user lifts the valve rod 11 upwards through the lifting button 12, the adsorption force between the valve rod 11 and the magnet 10 is larger than the adsorption force between the magnet 10 and the iron sheet 9, the valve core 8 is lifted upwards by the valve rod 11 to enable the transmission arm 6 to swing around the hinging point, and then the first arm body 6a of the transmission arm 6 drives the ejector rod assembly 4 to move leftwards to open the transition hole 1 d. After the transition hole 1d is opened, the gas enters the gas passing cavity 1b and flows out of the gas outlet hole 1c, and the pressure of the gas acts on the diaphragm 3 to deform it upward. During the continuous flow of the gas, the pressure of the gas also continuously acts on the diaphragm 3, so that the diaphragm 3 is always kept in an upwardly deformed state, whereby the valve stem 11 is also kept in an upwardly lifted state with the valve core 8, and the gas self-closing valve is always in an open state.

In this embodiment, as shown in fig. 2-6, the valve body 1 has a recess 1e recessed downward from the bottom wall of the air passing cavity 1b and a notch groove 1f, the notch groove 1f is laterally communicated with the upper port of the recess 1e, the bottom of the bracket 5 is located in the recess 1e and the ear seat 5b is partially located in the notch groove 1f, and the bracket 5 is directly installed into the valve body 1 in such a manner that the ear seat 5b is aligned with the notch groove 1f, so that excessive adjustment of the relative angle of the bracket 5 in the subsequent assembly process is not required. The left side of the support 5 is provided with a yielding groove 5c communicated with the slot 5a in a penetrating way, the yielding groove 5c is in a strip shape arranged vertically, the yielding groove 5c is used for enabling the second arm body 6b to penetrate through the left side of the support 5 and enabling the second arm body 6b to move when the valve core 8 moves up and down, and the yielding groove 5c penetrates through the top of the support 5. The front side and the rear side of the upper end of the bracket 5 are respectively provided with a lug 5d, the upper surface of each lug 5d is flush with the top surface of the bracket 5, the iron sheet 9 is abutted against the top surface of the bracket 5, and the iron sheet 9 is fixedly connected in the valve body 1 through a screw 13 penetrating through the iron sheet 9 and the lugs 5d and being in threaded connection with the valve body 1.

Further, as shown in fig. 1 and 2, the groove width of the fitting groove 8a is gradually increased from the center position thereof to the left and right end notches, respectively, the fitting groove 8a penetrates the partial bottom wall of the valve body 8, the bottom of the valve body 8 forms a block portion 8b located between the left and right end notches of the fitting groove 8a in the fitting groove 8a, and the block portion 8b can abut against the lower side surface of the second arm 6b when the valve body 8 moves upward. The upper groove wall of the mating groove 8a has two inclined surfaces 8a1, the distance between the two inclined surfaces 8a1 gradually decreases from top to bottom, the upper surface of the block-shaped portion 8b is a plane, the upper groove wall of the mating groove 8a also has an action surface 8a2 connected between the lower ends of the two inclined surfaces 8a1, and the action surface 8a2 is opposite to the upper surface of the block-shaped portion 8 b. The block portion 8b has two inclined surfaces 8b1 on both sides thereof, and the distance between the two inclined surfaces 8b1 increases gradually from top to bottom. In the present embodiment, the left and right end notches of the fitting groove 8a are symmetrically distributed about the block portion 8 b.

When in assembly, the transmission arm 6 is hinged on the lug seat 5b of the bracket 5 by the pin shaft 7, and then the bracket 5 is put into the valve body 1. Then, the ejector rod assembly 4 is placed into the valve body 1 from the outside of the air inlet hole 1a, the right end of the rod body 4a in the ejector rod assembly 4 stretches into the air passing cavity 1b, then an assembler adjusts the position of the socket 4a1 at the right end of the rod body 4a and dials the driving arm 6 to enable the end of the first arm 6a to be inserted into the socket 4a 1. Then, the valve element 8 is directly put into the slot 5a from top to bottom (since the notches at both ends of the fitting groove 8a on the valve element 8 are symmetrically distributed about the block 8b, the valve element 8 may be put into the slot 5a with which notch of the fitting groove 8a faces the left). Since the groove width of the fitting groove 8a is gradually increased from the center position thereof to the left and right end notches, respectively, the fitting groove 8a penetrates through a part of the bottom wall of the valve core 8, that is, a part of the bottom of the valve core 8 is empty, and by this part of the empty position, the end of the second arm 6b can directly enter the fitting groove 8a without being affected by the bottom wall of the valve core 8 when the valve core 8 is put into the slot 5a, as shown in fig. 7. Then, one of the inclined surfaces 8a1 in the upper groove wall of the mating groove 8a contacts and pushes the end of the second arm 6b during the process that the valve core 8 is continuously inserted into the slot 5a, so that the second arm 6b can swing downwards in cooperation with the insertion of the valve core 8 into the slot 5a, and finally passes between the upper surface of the block 8b and the acting surface 8a 2.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims (6)

1. The utility model provides a gas self-closing valve, includes valve body (1), along the slip setting in valve body (1) of left and right sides be used for realizing gas self-closing valve opening or closed ejector pin subassembly (4), link firmly in valve body (1) and along vertical support (5) and case (8) that are located in slot (5 a) that are equipped with slot (5 a), support (5) left side protrusion be provided with ear seat (5 b), articulated on ear seat (5 b) have first arm body (6 a) and second arm body (6 b) drive arm (6), the right-hand member of ejector pin subassembly (4) has along socket (4 a 1) of vertical setting, the tip of first arm body (6 a) inserts in the lower port of socket (4 a 1), the valve core (8) is provided with a matching groove (8 a) along the left-right direction, the second arm body (6 b) passes through the left side of the bracket (5) to the inside of the matching groove (8 a) to drive the transmission arm (6) to swing around a hinging point to drive the ejector rod assembly (4) to move when the valve core (8) moves, the valve core is characterized in that the groove width of the matching groove (8 a) is gradually increased from the middle position to the left-right end notch respectively, the upper side groove wall of the matching groove (8 a) is provided with two inclined planes I (8 a 1), the distance between the two inclined planes I (8 a 1) is gradually reduced from top to bottom, the matching groove (8 a) penetrates through the partial bottom wall of the valve core (8), the bottom of the valve core (8) forms a block part (8 b) positioned between the notches at the left end and the right end of the matching groove (8 a) in the matching groove (8 a), and the block part (8 b) can be abutted against the lower side surface of the second arm body (6 b) when the valve core (8) moves upwards.

2. The gas self-closing valve according to claim 1, wherein the upper surface of the block portion (8 b) is a plane, the upper side groove wall of the fitting groove (8 a) further has an action surface (8 a 2) connected between the lower ends of the two inclined surfaces (8 a 1), and the action surface (8 a 2) is disposed opposite to the upper surface of the block portion (8 b).

3. The gas self-closing valve according to claim 2, wherein the block portion (8 b) has two inclined surfaces (8 b 1) on the left and right sides thereof, respectively, and the distance between the two inclined surfaces (8 b 1) increases gradually from top to bottom.

4. A gas self-closing valve according to claim 3, wherein the left and right end notches of the fitting groove (8 a) are symmetrically distributed about the block portion (8 b).

5. The gas self-closing valve according to claim 1, 2, 3 or 4, wherein a relief groove (5 c) communicated with the slot (5 a) is formed in the left side of the bracket (5) in a penetrating manner, the second arm body (6 b) penetrates through the relief groove (5 c), the relief groove (5 c) is in a strip shape vertically arranged, and the relief groove (5 c) penetrates through the top of the bracket (5).

6. The gas self-closing valve according to claim 1, wherein the ear seat (5 b) is higher than the bottom surface of the bracket (5), the valve body (1) is internally provided with a notch (1 e) and a notch groove (1 f) laterally communicated with the upper port of the notch (1 e), the bottom of the bracket (5) is positioned in the notch (1 e), and the ear seat (5 b) is partially positioned in the notch groove (1 f).