CN221097588U

CN221097588U - Gas self-closing valve capable of closing along air flow

Info

Publication number: CN221097588U
Application number: CN202322578176.2U
Authority: CN
Inventors: 张永茂; 贺海林; 郑万捷
Original assignee: Zhejiang Jiaan Gas Safety Technology Co ltd
Current assignee: Zhejiang Jiaan Gas Safety Technology Co ltd
Priority date: 2023-09-22
Filing date: 2023-09-22
Publication date: 2024-06-07
Anticipated expiration: 2033-09-22

Abstract

The utility model discloses a gas self-closing valve capable of closing downstream, which comprises a valve body, wherein an air inlet pipe and an air outlet pipe are arranged on the valve body, a mounting port is arranged in the middle of the valve body, an end cover is arranged at the position of the mounting port, a guide block moves downwards to the bottom of a guide groove under the influence of weight in low pressure, and a valve plug is driven by a hinged plate and a sealing ring is used for sealing a valve port; when the pressure is high, the elastic diaphragm bulges upwards, the driving guide block moves upwards at the moment and falls to the bottom of the guide groove after being separated from the magnetic field gasket on the elastic diaphragm after contacting the limiting plate, and the valve plug is driven by the hinged plate and the sealing ring is enabled to seal the valve port, so that the self-closing is realized under the downright air flow direction under the low pressure or high pressure state.

Description

Gas self-closing valve capable of closing along air flow

Technical Field

The utility model relates to a self-closing valve on a gas pipeline, in particular to a gas self-closing valve capable of closing along the gas flow.

Background

The gas self-closing valve is arranged on a gas pipeline at a position in front of a kitchen range, and has an automatic closing function especially in a high-pressure state when the gas pipeline is in a gas interruption state, so that the safety use of the gas is related.

The Chinese patent grant publication No. CN 211779235U is a high-sensitivity gas self-closing valve, which comprises a valve body, a vertical valve rod, a leather cup and a valve cover, wherein a valve cavity is arranged in the valve body, the valve cavity is provided with an upper opening, the upper opening is covered and sealed by the leather cup, the valve cover is positioned above the leather cup to fix the leather cup, one end of the valve body is provided with a gas outlet, the other end of the valve body is provided with a gas inlet, the gas inlet is communicated with the valve cavity through the valve hole, the vertical valve rod can be movably arranged in the valve cavity up and down, the vertical valve rod is fixedly connected with the leather cup, the upper end of the vertical valve rod is connected with magnetic steel, the magnetic steel is movably arranged in a guide sleeve at the top of the valve cover, the bottom of the guide sleeve is fixedly provided with an iron sheet, the part of the vertical valve rod positioned in the valve cavity is fixedly connected with a cone, the side of the cone is provided with a tip cone which is propped against the cone under the action of a spring, and the other end of the transverse valve rod passes through the valve hole to be connected with a plug; in the normal pressure air supply state, the tip of the cone is opposite to the cone top of the tip cone.

The working principle is as follows: under the normal pressure air supply state of the gas pipeline, the cone tip part on the vertical valve rod is just right opposite to the tip cone top on the horizontal valve rod, when the air supply pressure generates under-pressure or high-pressure change, the downward movement or upward movement of the vertical valve rod can lead the cone tip part and the tip cone top to be staggered up and down, so under the action of the tower-shaped spring, the tip cone moves leftwards, the horizontal valve rod drives the plug to move leftwards, the plug is enabled to close the valve hole along the air flow direction, the under-pressure and high-pressure automatic closing function of the gas self-closing valve is realized, and the plug is enabled to close the valve hole along the air flow direction, so that good sealing of the plug can be ensured no matter how under-pressure and high-pressure change.

In the structure, especially the structure that the cone tip part on the vertical valve rod is exactly opposite to the tip of the tip cone on the horizontal valve rod has larger precision requirement in the processing process and larger difficulty in the assembling process, once problems occur in the process of processing and assembly, the product is detected to be unqualified, and thus, much reworking and maintenance cost and time delay are caused.

Disclosure of utility model

In order to solve the problems, the utility model aims to provide the gas self-closing valve which is stable and reliable in structure and closes along with the gas flow, and meanwhile, the assembly difficulty is reduced.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a following air current closes gas self-closing valve, includes the valve body be provided with intake pipe and outlet duct on the valve body be provided with the installing port on the middle part of valve body, install the end cover in the installing port position, still be provided with isolated rubber diaphragm between end cover and the installing port, the cover has the lift rod of upper and lower activity, the end connection of lift rod is on the elastic diaphragm, still includes the magnetic field gasket, the screw rod of a screw pass magnetic field gasket and elastic diaphragm with the lift rod is connected the below of magnetic field gasket is equipped with vertical guide slot, is equipped with the guide block that can follow it in this guide slot, has erect the limiting plate between guide block and magnetic field gasket, is equipped with the spacing hole on the limiting plate be equipped with the travel limit portion that can pass the spacing hole on the upper end perisporium of guide block, through the magnet of screw installation external diameter more than spacing hole after the up end of this travel limit portion, the port of intake pipe is used for the valve port, is provided with in the valve port along this valve port telescopic motion in the valve body, through transmission connection between the lower extreme of this valve plug and the valve plug pass the valve port configuration valve port back hinge plate valve port, can be passed through the valve port configuration and seal plug, when the valve plug bottom of sealing washer is lived to the shutoff valve port and the shutoff is driven to the valve port.

Be equipped with annular spacing ring on the end cover, spacing ring upper end outer wall is equipped with circular and the section is triangle-shaped's stopping ring, is connected with the end cap on the pull rod, is equipped with spacing gliding pull ring from top to bottom on the spacing ring outer wall, and the pull ring inner wall is equipped with the standing groove that supplies the end cap to place, and the hole wall of pull ring inwards extends the cooperation ring, and the internal diameter of this cooperation ring is less than the external diameter of stopping ring, and the triangle face slip-in cover of cooperation ring along stopping ring is established along its slip on the spacing ring.

An overcurrent protection device is arranged in the air inlet pipe, and a ball valve is arranged on the air outlet pipe.

The overcurrent protection device comprises an annular valve seat, a valve plate and a gland, wherein one end of the valve seat is provided with a ventilated bottom surface, an annular valve port ring is arranged in the valve seat, the valve plate is plugged by the gland after being arranged in the valve seat, the gland is provided with an air vent corresponding to the valve plate, the valve plate is provided with a guide shaft, one side of the guide shaft penetrates through a guide hole in the gland, the other side of the guide shaft is inserted into the guide hole in the bottom surface in a movable manner, and a spring is further arranged between the valve plate and the bottom surface.

The beneficial effects of the utility model are as follows: at low pressure, the guide block moves downwards to the bottom of the guide groove under the influence of weight, and the valve plug is driven by the hinged plate and the sealing ring is enabled to seal the valve port; when the pressure is high, the elastic diaphragm bulges upwards, the driving guide block moves upwards at the moment and falls to the bottom of the guide groove after being separated from the magnetic field gasket on the elastic diaphragm after contacting the limiting plate, and the valve plug is driven by the hinged plate and the sealing ring is enabled to seal the valve port, so that the self-closing is realized under the downright air flow direction under the low pressure or high pressure state.

The utility model is further described below with reference to the drawings and detailed description.

Drawings

FIG. 1 is a block diagram of a specific embodiment of the present utility model;

FIG. 2 is an enlarged view of A in FIG. 1;

Fig. 3 is an enlarged view of B in fig. 1.

Detailed Description

The present utility model is described in detail below by way of examples only for further explanation of the present utility model and is not to be construed as limiting the scope of the present utility model.

As shown in fig. 1-3, this embodiment discloses a gas self-closing valve closed by downstream flow, which comprises a valve body 1, the valve body 1 is provided with an air inlet pipe 2 and an air outlet pipe 3, a mounting opening is arranged in the middle of the valve body 1, an end cover 4 is arranged at the position of the mounting opening, an isolated rubber diaphragm 5 is further arranged between the end cover 4 and the mounting opening, a lifting rod 6 which moves up and down is sleeved on the end cover 4, the end part of the lifting rod 6 is connected on an elastic diaphragm 7, the valve further comprises a magnetic field gasket 8, a screw rod penetrates through the magnetic field gasket 8 and the elastic diaphragm 7 to be connected with the lifting rod 6, a vertical guide groove 9 is arranged below the magnetic field gasket 8, a guide block 10 which can slide along the guide groove 9 is arranged, a limit plate 20 is arranged between the guide block 10 and the magnetic field gasket 8, a limit hole is arranged on the limit plate 20, a travel limit part 101 which can penetrate through the limit hole is arranged on the peripheral wall of the upper end of the guide block 10, a magnet 30 which is sleeved on the upper end surface of the travel limit part 101 and has an outer diameter larger than the limit hole, an air outlet port 21 of the air inlet pipe 2 is used as a valve plug 21, and a valve plug 21 is arranged in the guide block 21 and a valve plug 40 is arranged in the guide block 21 and can move along the guide block 40, and the valve plug 40 is arranged at the bottom of the guide block 40, and the valve plug 50 is connected with the valve plug 50 by the guide block 40, and the valve plug 50 is arranged at the bottom 50.

The end cover 4 is provided with an annular limiting ring 41, the outer wall of the upper end of the limiting ring 41 is provided with a circular retaining ring 411 with a triangular section, the lifting rod 6 is connected with an end cap 61 (or a reset button for resetting the lifting rod), the outer wall of the limiting ring 41 is provided with a pull ring 62 which is limited and slides up and down, the pull ring 62 is made of plastic materials, the inner wall of the pull ring 62 is provided with a placing groove for placing the end cap 61, the inner hole wall of the pull ring 62 is inwards extended with a matching ring 621, the inner diameter of the matching ring 621 is smaller than the outer diameter of the retaining ring 411, and the matching ring 621 slides into the triangular surface of the retaining ring 411 to be sleeved on the limiting ring 41 and slide along the matching ring. The structure realizes that the pull ring 62 is sleeved on the end cover 4 to perform up-and-down limiting movement, and meanwhile, after the pull ring 62 is pulled up, the driving guide block 10 moves upwards to be separated from the magnetic field gasket 8 on the elastic diaphragm 7 after contacting the limiting plate 20 and then falls to the bottom of the guide groove 9, and at the moment, the valve plug 40 is driven by the hinged plate 50 and the valve port 21 is blocked by the sealing ring, so that manual closing is realized.

An over-current protection device 70 is arranged in the air inlet pipe 2, and can be automatically closed when the fuel gas flows through the device, and a ball valve 80 is arranged on the air outlet pipe 3, so that the pipeline can be manually closed.

The overcurrent protection device 70 comprises an annular valve seat 701, a valve plate 702 and a gland 703, wherein one end of the valve seat 701 is provided with a ventilated bottom surface, an annular valve port ring 705 is arranged in the valve seat 701, the valve plate 702 is plugged by the gland 703 after being arranged in the valve seat 701, the gland 703 is provided with a vent hole corresponding to the valve plate 702, the valve plate 702 is provided with a guide shaft, one side of the guide shaft penetrates through a guide hole in the gland 703, the other side of the guide shaft penetrates through a guide hole movably arranged on the bottom surface, and a spring 704 is further arranged between the valve plate 702 and the bottom surface. After ventilation, combustible gas can pass through the end face of the valve plate 702, so that the valve plate 702 can move along the axis of the guide shaft and is attached to the valve port ring to cut off the gas source, thereby effectively playing the role of overcurrent protection and greatly reducing the gas leakage risk.

By adopting the technical scheme, under low pressure, the guide block 10 moves downwards to the bottom of the guide groove 9 under the influence of weight, and the valve plug 40 is driven by the hinged plate 50 and the valve port 21 is blocked by the sealing ring 401; at high pressure, the elastic membrane 7 bulges upwards, at the moment, the driving guide block 10 moves upwards to be separated from the magnetic field gasket 8 on the elastic membrane 7 after contacting the limiting plate 20, and then falls to the bottom of the guide groove 9, at the moment, the valve plug 40 is driven by the hinged plate 50, and the valve port 21 is plugged by the sealing ring 401, so that self-closing is realized under the downright air flow direction in a low pressure or high pressure state, and the structure is stable and reliable, and meanwhile, the assembly difficulty is reduced.

The automatic high-low pressure closing structure in the gas self-closing valve is mainly used for closing the gas in the downstream direction.

While the fundamental and principal features of the utility model and advantages of the utility model have been shown and described, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a following air current closes gas self-closing valve, includes the valve body be provided with intake pipe and outlet duct on the valve body be provided with the installing port on the middle part of valve body, install the end cover in the installing port position, still be provided with isolated rubber diaphragm between end cover and the installing port, the cover has the lift rod of activity from top to bottom on the end cover, the end connection of lift rod is on elastic diaphragm, still includes magnetic field gasket, the screw rod of a screw pass magnetic field gasket and elastic diaphragm with lift rod is connected, its characterized in that: the lower part of the magnetic field gasket is provided with a vertical guide groove, a guide block capable of sliding along the guide groove is arranged in the guide groove, a limiting plate is arranged between the guide block and the magnetic field gasket, a limiting hole is formed in the limiting plate, a travel limiting part capable of penetrating through the limiting hole is arranged on the peripheral wall of the upper end of the guide block, the upper end face of the travel limiting part penetrates through the limiting hole, a magnet with the outer diameter larger than the inner diameter of the limiting hole is arranged through a screw, an air outlet port of the air inlet pipe is used as a valve port, a valve plug capable of moving in an extending mode along the valve port is arranged in the valve body, the valve plug is connected with the lower end of the guide block through hinge plate in a transmission mode, a sealing ring capable of blocking the valve port is arranged at the end portion of the valve plug after penetrating through the valve port, and the valve port is driven through the hinge plate and blocked by the sealing ring when the guide block moves to the bottom of the guide groove.

2. The forward flow shutoff gas self-closing valve of claim 1, wherein: be equipped with annular spacing ring on the end cover, spacing ring upper end outer wall is equipped with circular and the section is triangle-shaped's stopping ring, is connected with the end cap on the pull rod, is equipped with spacing gliding pull ring from top to bottom on the spacing ring outer wall, and the pull ring inner wall is equipped with the standing groove that supplies the end cap to place, and the hole wall of pull ring inwards extends the cooperation ring, and the internal diameter of this cooperation ring is less than the external diameter of stopping ring, and the triangle face slip-in cover of cooperation ring along stopping ring is established along its slip on the spacing ring.

3. The forward flow shutoff gas self-closing valve of claim 1, wherein: an overcurrent protection device is arranged in the air inlet pipe, and a ball valve is arranged on the air outlet pipe.

4. A forward flow shutoff gas self-closing valve as claimed in claim 3 wherein: the overcurrent protection device comprises an annular valve seat, a valve plate and a gland, wherein one end of the valve seat is provided with a ventilated bottom surface, an annular valve port ring is arranged in the valve seat, the valve plate is plugged by the gland after being arranged in the valve seat, the gland is provided with an air vent corresponding to the valve plate, the valve plate is provided with a guide shaft, one side of the guide shaft penetrates through a guide hole in the gland, the other side of the guide shaft is inserted into the guide hole in the bottom surface in a movable manner, and a spring is further arranged between the valve plate and the bottom surface.