CN220168653U

CN220168653U - Connecting rod type gas pipeline self-closing valve

Info

Publication number: CN220168653U
Application number: CN202320642970.6U
Authority: CN
Inventors: 严奇奇; 徐荣华; 余志明; 郭康; 刘仁河
Original assignee: Fato Gas Equipment (hebei) Ltd
Current assignee: Fato Gas Equipment (hebei) Ltd
Priority date: 2023-03-29
Filing date: 2023-03-29
Publication date: 2023-12-12
Anticipated expiration: 2033-03-29

Abstract

The utility model discloses a connecting rod type gas pipeline self-closing valve, which belongs to the field of gas valves and comprises a valve body, wherein an inner cavity of the valve body is communicated with a gas pipeline, a transmission sealing assembly is used for enabling the inner cavity of the valve body to be connected with gas, a sliding block is arranged in the inner cavity of the valve body and used for enabling the transmission sealing assembly to act, an action assembly is used for enabling the sliding block to move under the action of external force or in a state that the gas pressure in the inner cavity of the gas pipeline is smaller than or larger than a set value and is perpendicular to the direction of the gas pipeline, the transmission sealing assembly comprises a valve rod which is arranged in the inner cavity of the valve body and reciprocates along the direction of the gas pipeline, a sealing block which is suitable for the inner cavity of the valve body is fixedly arranged on the valve rod, when the valve rod reciprocates along the direction of the gas pipeline, the sealing block seals or conducts the gas pipeline, and a connecting rod is hinged between the sliding block and the valve rod. The utility model simplifies the structure in the valve body, reduces the production cost, has more stable transmission and higher precision, and is suitable for all gas pipelines needing to be provided with the self-closing valve.

Description

Connecting rod type gas pipeline self-closing valve

Technical Field

The utility model belongs to the field of gas valves, and relates to a self-closing valve, in particular to a connecting rod type gas pipeline self-closing valve.

Background

Along with the popularization of the fuel gas, potential safety hazards caused by the fuel gas also become problems to be considered, and factors influencing the safety of the fuel gas mainly include overpressure, undervoltage and overcurrent of the fuel gas. In the related art, in order to improve the safety of gas use, a self-closing valve and an overcurrent device are usually arranged on a gas pipeline, when the gas is overcurrent, the overcurrent device is self-closed, and when the gas is over-pressurized and under-pressurized, the self-closing valve is closed through an internal transmission structure of the self-closing valve, and an air source is cut off, so that the safety is ensured.

The common self-closing valve comprises a transmission sealing assembly for making the inner cavity of the valve body open and close to gas and an action assembly for making the transmission sealing assembly act under the action of external force or under the overpressure, under-pressure and over-current states of the inner cavity of the gas pipeline. The action assembly comprises a diaphragm assembly for dividing the interior of the valve body into an upper valve body and a lower valve body, and an air inlet and an air outlet of the valve body are communicated with the lower valve body. The top end of the upper valve body is provided with a lifting button, the lower end of the lifting button is connected with a lifting pull rod penetrating through the diaphragm assembly to the inside of the lower valve body, and the lower end of the lifting pull rod is fixedly provided with an upper armature; the lower valve body is internally provided with a lower armature parallel to the upper armature, a magnet used for adsorbing the upper armature and the lower armature is arranged between the upper armature and the lower armature, the lower end of the magnet is fixedly provided with a sliding block penetrating through the lower armature, and the lower end of the sliding block is connected with a transmission sealing assembly. When the gas pipeline sealing device is used, the magnet can be attracted to the upper armature or the lower armature through the deformation of the diaphragm assembly caused by the lifting buttons or the change of air flow, so that the magnet moves up and down, the up-and-down movement of the magnet drives the sliding block at the lower end of the magnet to move up and down, the up-and-down movement of the sliding block is transmitted to the transmission sealing assembly, and finally the gas pipeline sealing or the conduction is realized through the transmission sealing assembly.

The structure of the transmission sealing assembly in the self-closing valve is complex, such as a gear-rack transmission assembly and a gas self-closing valve disclosed in Chinese patent 201911237922.3, the transmission sealing assembly converts the up-and-down motion of a sliding block into the left-and-right motion of a valve rod through a gear rack and a cam, and finally the sealing or the conduction of a gas pipeline is realized through a spring, a sealing block and other structures.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model aims to provide the connecting rod type gas pipeline self-closing valve so as to achieve the purposes of simplifying an internal transmission structure, reducing cost and improving stability and precision.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the connecting rod type gas pipeline self-closing valve comprises a valve body, a transmission sealing assembly, a sliding block and an action assembly, wherein the valve body is communicated with a gas pipeline, the transmission sealing assembly is used for enabling the gas in the inner cavity of the valve body to be on-off, the sliding block is arranged in the inner cavity of the valve body and used for enabling the transmission sealing assembly to act, and the action assembly is used for enabling the sliding block to move perpendicular to the direction of the gas pipeline under the action of external force or in a state that the gas pressure in the inner cavity of the gas pipeline is smaller than or larger than a set value; the transmission sealing assembly comprises a valve rod which is arranged in the inner cavity of the valve body and reciprocates along the direction of the gas pipeline, and a sealing block which is adapted to the inner cavity of the valve body is fixedly arranged on the valve rod, so that the sealing block seals or conducts the gas pipeline when the valve rod reciprocates along the direction of the gas pipeline; a connecting rod is hinged between the sliding block and the valve rod.

As a limitation of the present utility model: the valve rod is characterized in that a first ventilation groove is formed in one end, connected with the connecting rod, of the valve rod, a first fixing shaft is arranged in the first ventilation groove, a first fixing hole matched with the first fixing shaft is formed in one end, facing the valve rod, of the connecting rod, and the connecting rod is connected with the valve rod in a rotating mode through the first fixing hole and the first fixing shaft.

As a limitation of the present utility model: the second ventilation groove is formed in one end, connected with the connecting rod, of the sliding block, a second fixing shaft is arranged in the second ventilation groove, a second fixing hole matched with the second fixing shaft is formed in one end, facing the sliding block, of the connecting rod, and the connecting rod is connected with the sliding block in a rotating mode through the second fixing hole and the second fixing shaft.

As a limitation of the present utility model: the valve rod is provided with a first vent groove, one end of the valve rod is fixedly provided with a protruding part, and a valve rod channel matched with the size of the protruding part of the valve rod is formed in the inner cavity of the valve body.

As a limitation of the present utility model: the valve rod channel is provided with a valve body ventilation groove corresponding to the first ventilation groove.

As a limitation of the present utility model: the sealing block is fixedly arranged at the end part of the valve rod, a narrow opening matched with the sealing block is formed in the inner cavity of the valve body, an air ventilation block matched with the narrow opening in size is fixedly arranged on the valve rod, and an air vent along the length direction of the valve rod is formed in the air ventilation block.

As a limitation of the present utility model: the action assembly comprises a diaphragm assembly which deforms when pressure changes, the diaphragm assembly divides the interior of the valve body into an upper valve body and a lower valve body which is communicated with a gas pipeline, a lifting button is arranged at one end, far away from the ground, of the upper valve body, a lifting rod which penetrates through the diaphragm assembly to the interior of the lower valve body in a sealing mode is connected at one end, close to the ground, of the lifting button, an upper armature is fixedly arranged at the lower end of the lifting rod, a lower armature which is parallel to the upper armature is fixedly arranged inside the lower valve body, a magnet which is used for movably absorbing the upper armature and the lower armature is arranged between the upper armature and the lower armature, the magnet is fixedly arranged on a connecting block which penetrates through the lower armature, and the slider is fixedly arranged at the other end of the connecting block and limits the connecting block.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

the utility model adopts the connecting rod type transmission sealing component, has simpler structure, uses fewer parts, reduces the production cost and simplifies the structure inside the valve body; further, the first ventilation groove has been seted up to the valve rod, the connecting rod tip moves in first ventilation groove, this kind of centre gripping formula is connected, make it more stable than ordinary connecting rod structure, and, all be provided with the ventilation groove at valve rod, slider and valve body inner chamber, can increase the sectional area of gas passage, make more gas pass through, make the precision of self-closing valve improve, also, still be provided with bellying and vent block on the valve rod, turn into the contact of bellying and vent block with the valve body inside with the contact of valve rod with the valve body inside, the sectional area of contact has been reduced, therefore the sectional area of gas passage has been increased, further the precision of self-closing valve has been improved.

In summary, the utility model simplifies the structure inside the valve body, reduces the production cost, has more stable transmission and higher precision, and is suitable for all gas pipelines needing to be provided with the self-closing valve.

Drawings

The utility model will be described in more detail below with reference to the accompanying drawings and specific examples.

FIG. 1 is a schematic diagram of an embodiment of a conductive state structure;

FIG. 2 is a schematic view of a closed state according to an embodiment of the present utility model;

fig. 3 is a perspective view of a drive seal assembly in accordance with an embodiment of the present utility model.

In the figure: the valve comprises a 1-upper valve body, a 2-lower valve body, a 3-diaphragm assembly, a 31-diaphragm, a 32-diaphragm pressing piece, a 4-air inlet, a 5-air outlet, a 6-lifting button, a 7-lifting pull rod, an 8-upper armature, a 9-lower armature, a 10-magnet, an 11-connecting block, a 12-slider, a 13-transmission sealing assembly, a 131-valve rod, a 132-sealing block, a 133-connecting rod, a 134-ventilation block, a 135-air vent, a 136-first ventilation groove, a 137-second ventilation groove, a 138-protruding part, a 14-narrow opening, a 15-valve body ventilation groove and a 16-air outlet switch valve.

Detailed Description

Preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the connecting rod type gas pipeline self-closing valve is a preferred embodiment, and is only used for illustrating and explaining the utility model, and is not limited by the utility model.

The terms or positional relationships of "upper", "lower", "left", "right" and the like in the present utility model are based on the positional relationships of fig. 1 and 2 of the drawings in the present specification, and are merely for convenience of describing the present utility model and simplifying the description, and are not intended to indicate or imply that the apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the protection of the present utility model.

Embodiment is a connecting rod type gas pipeline self-closing valve

The embodiment is shown in fig. 1 to 3, and is a connecting rod type gas pipeline self-closing valve, which comprises a valve body with an inner cavity communicated with a gas pipeline, a transmission sealing assembly 13 for making the inner cavity of the valve body open and close gas, a sliding block 12 arranged in the inner cavity of the valve body and used for enabling the transmission sealing assembly 13 to act, and an action assembly used for enabling the sliding block 12 to move perpendicular to the direction of the gas pipeline under the action of external force or in the state that the gas pressure in the inner cavity of the gas pipeline is smaller than or larger than a set value.

The action assembly comprises a diaphragm assembly 3 dividing the interior of the valve body into an upper valve body 1 and a lower valve body 2, wherein the diaphragm assembly 3 comprises a diaphragm 31 and a diaphragm pressing sheet 32 which are horizontally arranged, the diaphragm assembly 3 is arranged between the upper valve body 1 and the lower valve body 2 in a sealing way, and the lower valve body 2 is communicated with a gas pipeline through an air inlet 4 and an air outlet 5. The upper valve body 1 is far away from ground one end, namely, the top end of the upper valve body 1 is provided with a movable lifting button 6, one side, close to the ground one end, of the lifting button 6, namely, positioned in the upper valve body 1 is connected with a lifting rod 7 which penetrates through the diaphragm assembly 3 to the interior of the lower valve body 2 in a sealing manner, and the lower end of the lifting rod 7 is fixedly provided with an upper armature 8 which is horizontally arranged. The lower armature 9 parallel to the upper armature 8 is fixedly arranged in the lower valve body 2, the magnet 10 which can absorb the upper armature 9 and the lower armature 9 in a movable mode in the vertical direction is arranged between the upper armature 9 and the lower armature 9, the magnet 10 moves upwards to absorb the upper armature 8, the magnet 10 moves downwards to absorb the lower armature 9, the magnet 10 is fixedly arranged on the connecting block 11 penetrating through the lower armature 9, the connecting block 11 is not provided with magnetism, the other end (lower end) of the connecting block 11 is integrally provided with the sliding block 12, when the lifting button 6 is pulled, namely, the external force acts, or the air pressure in the cavity of the lower valve body 2 is smaller than and larger than a set value, the magnet 10 moves between the upper armature 8 and the lower armature 9 in the vertical direction, namely, the direction perpendicular to a gas pipeline, and then the connecting block 11 and the sliding block 12 are driven to move in the vertical direction, and the dimension of the sliding block 12 in the horizontal direction is larger than the dimension of the connecting block 11 in the horizontal direction, so that when the connecting block 11 and the magnet 10 move upwards, the sliding block 12 can play a limiting role in the movement of the connecting block 11 and the magnet 10. The diaphragm assembly 3, the lifting button 6, the lifting rod 7, the upper armature 8, the lower armature 9 and the magnet 10 are all of the prior art.

Under the action of external force or in the state that the gas pressure in the inner cavity of the gas pipeline is smaller than or larger than a set value, the action assembly enables the sliding block 12 to move along the vertical direction, namely, the direction vertical to the gas pipeline. The slide block 12 further drives the transmission sealing component 13 to act, so that the sealing or the conduction of the gas pipeline is realized. In this embodiment, the transmission sealing assembly 13 includes a valve rod 131 disposed inside the lower valve body 2 and reciprocating along the direction of the gas pipeline, and a sealing block 132 adapted to the inner cavity of the valve body is fixedly disposed on the valve rod 131, so that when the valve rod 131 reciprocates along the direction of the gas pipeline, the sealing block 132 seals or conducts the gas pipeline, and the size of the valve rod 131 is adapted to the size of the inner cavity of the lower valve body 2, so that when the sealing block 132 is opened, the gas can pass through the lower valve body 2 provided with the valve rod 131. Between the valve stem 131 and the slider 12, a link 133 that transmits the reciprocating motion of the slider 12 perpendicular to the gas pipe direction to the reciprocating motion of the valve stem 131 in the gas pipe direction is hinged.

In this embodiment, the left side is the gas inlet 4, the right side is the gas outlet 5, the gas inlet 4 and the gas outlet 5 are parallel and communicated with the gas pipeline, the sealing block 132 is a cylindrical rubber block fixed at the left end of the valve rod 131, the shaft of the sealing block 132 is arranged along the horizontal direction, the right side of the sealing block 132 is arranged in the inner cavity, the inner diameter is narrowed, a circular narrow opening 14 matched with the sealing block 132 is formed, the adaptation means that the size of the narrow opening 14 is smaller than the size of the sealing block 132 and is larger than the size of the valve rod 131, when the sealing block 132 moves leftwards, a channel for allowing the gas to pass through is formed between the narrow opening 14 and the sealing block 132, at the moment, in the rightward movement of the sealing block 132, the narrow opening 14 is smaller than the size of the sealing block 132, the sealing block 132 completely covers the narrow opening 14, at the moment, and is in the sealing state. In order to make the movement of the valve rod 131 more stable, a vent block 134 with a size matching with the slit 14 is integrally formed on the valve rod 131, wherein the matching means that the shape and the size of the vent block 134 are matched with the slit 14, that is, the vent block 134 is in a cylinder shape with a size slightly smaller than the inner diameter of the slit 14, so that the vent block 134 can be slidably arranged in the slit 14, in order to ensure that the gas can smoothly pass through, the periphery of the outer edge of the vent block 134 is uniformly provided with vent holes 135 along the length direction of the valve rod 131, and in the embodiment, the vent holes 135 are concave arc-shaped openings formed on the wall of the vent block 134.

As shown in fig. 3, the link 133 is disposed on the valve stem 131 at an angle, and transmits the reciprocating motion of the slider 12 perpendicular to the gas pipe direction to the reciprocating motion of the valve stem 131 in the gas pipe direction. In this embodiment, when the slider 12 moves upward, the valve rod 131 moves leftward, and the self-closing valve is in a conductive state, and when the slider 12 moves downward, the valve rod 131 moves rightward, and the self-closing valve is in a sealed state.

The connecting rod 133 in this embodiment is a strip-shaped sheet structure, one end of the valve rod 131 connected with the connecting rod 133 is the right end of the valve rod 131 in this embodiment, a first ventilation groove 136 is formed in the middle, the first ventilation groove 136 is formed in the middle of the valve rod 131 from one side of the valve rod 131 far away from the sealing block 132, a first fixing shaft perpendicular to the connecting rod 133 along the horizontal direction is arranged in the first ventilation groove 136, and meanwhile, a first fixing hole matched with the first fixing shaft is formed in one end of the connecting rod 133 facing the valve rod 131, and the connecting rod 133 is rotationally connected with the valve rod 131 through the first fixing hole and the first fixing shaft. Similarly, a second ventilation groove 137 is formed in the horizontal direction at the end of the slider 12 connected to the link 133, that is, at the lower end of the slider 12, a second fixing shaft parallel to the first fixing shaft is disposed in the second ventilation groove 137, a second fixing hole matched with the second fixing shaft is disposed at the end of the link 133 facing the slider 12, and the link 133 is rotatably connected to the slider 12 through the second fixing hole and the second fixing shaft. The sheet structure of the link 133 is provided in the first and second ventilation grooves 136 and 137, and thus, the structure can be more stable, and simultaneously, the passage through which the air flow passes can be maximized, increasing the accuracy of the self-closing valve.

A passage for allowing the air flow to pass through while guiding the valve stem 131 is formed in the inner cavity of the lower valve body 2, specifically, a valve stem passage having a size matching that of the valve stem 131 is formed in the inner cavity of the lower valve body 2, and a valve body vent groove 15 is formed in a portion of the valve stem passage matching with the valve body (the vent groove 15 is provided, and thus the vent groove portion is not cut in a cross section). Further, one end of the first ventilation slot 136, i.e. the right end of the valve rod 131, is formed on the valve rod 131, and the boss 138 is formed integrally with the valve rod channel, so that only part of the boss 138 contacts with the valve rod channel on the surface of the valve rod 131 with the boss 138, and the rest part can be regarded as expanding the ventilation channel, thereby further increasing the precision of the self-closing valve.

The gas outlet switch valve 16 is connected in series on the right side of the self-closing valve, namely on the gas pipeline at one side of the gas outlet 5, so that the manual opening and closing of the gas pipeline are realized, and the structure of the gas outlet switch valve 16 is the prior art.

As shown in fig. 1, when the present embodiment works normally, after the pipe is ventilated, the lifting button 6 is lifted under the action of manpower, i.e. external force, to drive the lifting rod 7 to move upwards, because the magnet 10 attracts the upper armature 8 at this time, the magnet 10 follows the lifting rod 7 to move upwards under the drive of the upper armature 8, so as to drive the slider 12 to move upwards, the valve rod 131 moves leftwards, the self-closing valve is conducted, and the valve is in a normal working state.

As shown in fig. 2, when the embodiment is in the under-pressure valve closing state, the ventilation pressure of the self-closing valve is smaller than the set value, the upward buoyancy of the fuel gas is smaller than the attraction force of the lower armature 9 and the magnet 10 and the downward combined force of the gravity of the slider 12 and the whole assembly of the lifting rod 7, the whole motion assembly drives the slider 12 to move downwards, the valve rod 131 moves rightwards, the sealing block 132 moves rightwards to be tightly attached to the narrow opening 14 of the inner cavity of the lower valve body 2, the circulation of the fuel gas is blocked, the under-pressure automatic closing of the embodiment is realized, and the air source is cut off.

As shown in fig. 2, when the embodiment is in the state of closing the valve by overpressure, the ventilation pressure of the self-closing valve is greater than the set value, the diaphragm assembly 3 drives the lifting rod 7 to generate upward movement trend, at the moment, the gas buoyancy force and the upward force of the diaphragm assembly 3 are greater than the attraction force of the lower armature 9 and the magnet 10 and the downward resultant force of the gravity of the whole assembly of the sliding block 12 and the lifting rod 7, at the moment, the magnet 10 drives the sliding block 12 to generate upward movement trend, the lower armature 9 generates downward force on the sliding block 12 due to the limit action of the sliding block 12 on the lower armature 9, the magnet 10 is separated from the upper armature 8 under the downward force, the lower armature 9 is adsorbed, the sliding block 12 moves downward, the valve rod 131 moves rightward, the sealing block 132 moves rightward tightly to be attached to the narrow opening 14 of the inner cavity of the lower valve body 2, the gas circulation is blocked, the overpressure automatic closing of the embodiment is realized, and the gas source is cut off.

The embodiment can be combined with an overcurrent device (not shown in the figure), the structure of the overcurrent device is the prior art, the overcurrent device and the self-closing valve are connected in series on a gas pipeline during use, when gas overflows, the overcurrent device is self-closed, the self-closing valve body is under-pressure to realize closing, and the gas source is cut off.

Claims

1. A connecting rod type gas pipeline self-closing valve is characterized in that: the device comprises a valve body, a transmission sealing assembly, a sliding block, an action assembly and a control unit, wherein the valve body is communicated with a gas pipeline, the transmission sealing assembly is used for enabling the gas in the inner cavity of the valve body to be switched on and off, the sliding block is arranged in the inner cavity of the valve body and used for enabling the transmission sealing assembly to act, and the action assembly is used for enabling the sliding block to move perpendicular to the direction of the gas pipeline under the action of external force or in the state that the gas pressure in the inner cavity of the gas pipeline is smaller than or larger than a set value;

the transmission sealing assembly comprises a valve rod which is arranged in the inner cavity of the valve body and reciprocates along the direction of the gas pipeline, and a sealing block which is adapted to the inner cavity of the valve body is fixedly arranged on the valve rod, so that the sealing block seals or conducts the gas pipeline when the valve rod reciprocates along the direction of the gas pipeline; a connecting rod is hinged between the sliding block and the valve rod.

2. The connecting rod type gas pipeline self-closing valve according to claim 1, wherein: the valve rod is characterized in that a first ventilation groove is formed in one end, connected with the connecting rod, of the valve rod, a first fixing shaft is arranged in the first ventilation groove, a first fixing hole matched with the first fixing shaft is formed in one end, facing the valve rod, of the connecting rod, and the connecting rod is connected with the valve rod in a rotating mode through the first fixing hole and the first fixing shaft.

3. The connecting rod type gas pipeline self-closing valve according to claim 2, wherein: the second ventilation groove is formed in one end, connected with the connecting rod, of the sliding block, a second fixing shaft is arranged in the second ventilation groove, a second fixing hole matched with the second fixing shaft is formed in one end, facing the sliding block, of the connecting rod, and the connecting rod is connected with the sliding block in a rotating mode through the second fixing hole and the second fixing shaft.

4. A connecting rod gas pipeline self-closing valve as defined in claim 3, wherein: the valve rod is provided with a first vent groove, one end of the valve rod is fixedly provided with a protruding part, and a valve rod channel matched with the size of the protruding part of the valve rod is formed in the inner cavity of the valve body.

5. The connecting rod type gas pipeline self-closing valve according to claim 4, wherein: the valve rod channel is provided with a valve body ventilation groove corresponding to the first ventilation groove.

6. The connecting rod type gas pipeline self-closing valve according to claim 1, wherein: the sealing block is fixedly arranged at the end part of the valve rod, a narrow opening matched with the sealing block is formed in the inner cavity of the valve body, an air ventilation block matched with the narrow opening in size is fixedly arranged on the valve rod, and an air vent along the length direction of the valve rod is formed in the air ventilation block.

7. A connecting rod type gas pipeline self-closing valve according to any one of claims 1 to 6, characterized in that: the action assembly comprises a diaphragm assembly which deforms when pressure changes, the diaphragm assembly divides the interior of the valve body into an upper valve body and a lower valve body which is communicated with a gas pipeline, a lifting button is arranged at one end, far away from the ground, of the upper valve body, a lifting rod which penetrates through the diaphragm assembly to the interior of the lower valve body in a sealing mode is connected at one end, close to the ground, of the lifting button, an upper armature is fixedly arranged at the lower end of the lifting rod, a lower armature which is parallel to the upper armature is fixedly arranged inside the lower valve body, a magnet which is used for movably absorbing the upper armature and the lower armature is arranged between the upper armature and the lower armature, the magnet is fixedly arranged on a connecting block which penetrates through the lower armature, and the slider is fixedly arranged at the other end of the connecting block and limits the connecting block.