CN220416353U

CN220416353U - Gas self-closing valve

Info

Publication number: CN220416353U
Application number: CN202322039983.7U
Authority: CN
Inventors: 陈英波
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-01-30
Anticipated expiration: 2033-07-31

Abstract

The utility model belongs to the technical field of self-closing valves, in particular to a gas self-closing valve with long service life, which comprises: the valve comprises a valve body, a mounting pipe, a valve rod and a linkage rod, wherein the upper end of the linkage rod is provided with a magnet adsorbed with the pull rod, and the lower end of the linkage rod is provided with a linkage seat connected with the sliding part; the linkage seat is driven by the linkage rod to move up and down and is used for simultaneously driving the sliding part to slide in the mounting pipe. The overvoltage protection and the undervoltage protection are realized through the structure that the linkage rod and the linkage seat are already provided with magnets; meanwhile, the valve rod, the linkage seat and the linkage rod are arranged in the mounting pipe, so that a structure for mounting the valve rod and the linkage seat is not required to be cast in the valve body, the manufacturing difficulty of the valve body is reduced, and the manufacturing efficiency of a product is improved.

Description

Gas self-closing valve

Technical Field

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

Background

The self-closing valve for pipeline gas is a device which is installed on low-pressure gas pipeline, does not need electric power or other external power when the gas supply pressure of pipeline is under-pressure or over-pressure, and can be automatically closed and needs to be manually opened. The principle is that the permanent magnetic material is magnetized into a permanent memory multipolar permanent magnetic linkage mechanism according to the design requirement, the change of the gas pressure parameter passing through the multipolar permanent magnetic linkage mechanism is identified, and when the pressure parameter exceeds a safety set value, the valve is automatically closed to cut off the gas source.

The utility model 2023200760697 discloses a pipeline gas self-closing valve, which comprises a valve body and a valve cover, wherein the top of the valve body is provided with an open mouth, a main sealing ring for sealing the open mouth is clamped between the valve cover and the valve body, and the lower end of a main sealing pull rod penetrates out of the main sealing ring and is connected with the main sealing ring; still be equipped with the guide holder in the valve body, there is fixed iron sheet at the guide holder top through the button head screw closing cap, insert in the guide holder and be equipped with the chute leading truck, fixed iron sheet is worn out to the upper end of chute leading truck and have annular strong magnet through countersunk head screw connection, the lower extreme chute intussuseption of chute leading truck has the guide pillar of sealed pull rod, be equipped with round internal diameter internal convex fender shoulder in the inlet end of valve body, the guide holder is worn out to the one end of sealed pull rod and keeps off the shoulder, the outer end of sealed pull rod is inlayed towards the terminal surface that keeps off the shoulder and is equipped with the pull rod sealing washer, there is the gap of admitting air between the outer end of pull rod sealing washer and the inlet end inner wall.

The valve body in the patent is integrally formed with a guide seat for placing the chute guide frame, and the guide seat needs to be integrally formed in the valve body when the valve body is cast, so that the manufacturing difficulty of the valve body is increased.

Disclosure of Invention

The utility model aims to provide a gas self-closing valve.

The purpose of the utility model is realized in the following way:

a gas self-closing valve comprising:

the valve body is provided with an opening at the top, a valve cover is arranged on the opening, a diaphragm sealed on the opening is arranged between the valve cover and the valve body, a pull rod is connected to the diaphragm, and an operation end penetrating through the valve cover and arranged outside the valve cover is arranged on the pull rod; an inlet part and an outlet part are also arranged on two sides of the valve body;

the installation tube is arranged in the valve body, and the two ends of the installation tube are provided with a first inlet and a first outlet which are respectively connected with the inlet part and the outlet part; the mounting tube is also provided with a plurality of first air vents which enable the inlet part, the outlet part and the valve body to be communicated;

the valve rod comprises a sliding part and a plugging part, the sliding part is positioned in the mounting pipe and slides along the mounting pipe, the plugging part is positioned outside the mounting pipe, and the plugging part is plugged on the first inlet when the sliding part slides;

the upper end of the linkage rod is provided with a magnet which is adsorbed with the pull rod, and the lower end of the linkage rod is provided with a linkage seat which is connected with the sliding part; the linkage seat is driven by the linkage rod to move up and down and is used for simultaneously driving the sliding part to slide in the mounting pipe.

Further, a slot is formed in the linkage seat, oblique sliding grooves are formed in the linkage seats at two sides of the slot, sliding pins are arranged at two sides of the valve rod, when the linkage seat is linked with the valve rod, the valve rod is located in the slot, and the sliding pins are located in the oblique sliding grooves at two sides of the slot.

Further, a lifting opening for lifting the linkage seat is formed in the mounting tube.

Further, a guide sliding seat is arranged in the mounting pipe, and two sides of the valve rod are positioned on the guide sliding seat and slide.

Further, a sealing cover positioned below the diaphragm is arranged on the opening, and the linkage rod is arranged on the sealing cover in a penetrating way, so that the magnet is arranged above the sealing cover;

the sealing cover is also provided with a plurality of second air vents.

Further, a pressing plate is further connected to the pull rod and abuts against the upper end face of the diaphragm.

Further, one end of the installation tube is provided with a clamping circular arc boss, a clamping groove corresponding to the clamping circular arc boss is arranged in the inlet part or the outlet part, and the other end of the installation tube is provided with a sealing groove for installing a sealing ring.

Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

the overvoltage protection and the undervoltage protection are realized through the structure that the linkage rod and the linkage seat are already provided with magnets; meanwhile, the valve rod, the linkage seat and the linkage rod are arranged in the mounting pipe, so that a structure for mounting the valve rod and the linkage seat is not required to be cast in the valve body, the manufacturing difficulty of the valve body is reduced, and the manufacturing efficiency of a product is improved. Moreover, because the valve rod is basically arranged in the mounting pipe, the sliding part of the valve rod is protected by the mounting pipe, and the valve rod is prevented from being corroded by fuel gas to influence the quality of the valve rod after long-term use, so that the effect of prolonging the service life of the valve rod is achieved.

Moreover, the installation tube in this patent is fixed through the structure of block circular arc boss in the installation tube, only need with the installation tube inserts can realize in the valve body that the installation tube is fixed, install swiftly convenient, effectively increase product manufacturing efficiency.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic cross-sectional view of the present utility model.

Fig. 3 is an exploded view of the present utility model.

Fig. 4 is a schematic cross-sectional view of the mounting tube.

Fig. 5 is an enlarged view at a in fig. 2.

The meaning indicated by the reference numerals in the figures:

1. a valve body; 11. an opening; 12. a valve cover; 121. a pressing seat; 13. a diaphragm; 14. a pull rod; 15. an operation end; 16. an inlet portion; 17. an outlet portion; 171. a clamping groove; 172. a throttle valve; 18. a cover; 181. a second vent; 19. a pressing plate;

2. installing a pipe; 21. a first vent; 22. a lifting opening; 23. a guide slide; 24. clamping the arc boss; 25. sealing grooves; 26. a first inlet; 27. a first outlet;

3. a valve stem; 31. a sliding part; 32. a blocking part; 33. a sliding pin;

41. a linkage rod; 42. a linkage seat; 421. a slot; 422. an inclined chute; 43. a magnet;

Detailed Description

The utility model is further described with reference to the following specific examples:

a gas self-closing valve comprises a valve body 1, a valve cover 12, a diaphragm 13, a pull rod 14, a mounting pipe 2, a valve rod 3, a linkage rod 41, a linkage seat 42 and a magnet 43. As shown in fig. 1, the middle part of the valve body 1 is in a dish shape, and the middle part of the valve body 1 is used for installing the components; the valve body 1 is provided with a tubular inlet 16 and outlet 17 on both sides, and the inlet 16 and outlet 17 are used for gas inlet and gas outlet.

The top of the valve body 1 is provided with an opening 11, the opening 11 is provided with a valve cover 12, a diaphragm 13 which is sealed on the opening 11 is arranged between the valve cover 12 and the valve body 1, the diaphragm 13 is connected with a pull rod 14, and the pull rod 14 is provided with an operating end 15 which penetrates through the valve cover 12 and is arranged outside the valve cover 12. As shown in fig. 1-3, the pull rod 14 is provided with a connecting end penetrating through the lower end of the diaphragm 13 and connected with the diaphragm 13, and is fixed on the diaphragm 13 in an adhesion manner, the top of the valve cover 12 is further provided with a pressing seat 121, an operating end 15 of the pull rod 14 is positioned in the pressing seat 121, and the operating end 15 of the pull rod 14 is driven by driving the pressing seat 121, so that the pull rod 14 is operated to lift and further the diaphragm 13 is driven to compress inwards.

The installation tube 2 is generally made of plastic material, and is disposed in the valve body 1, and two ends of the installation tube 2 are provided with a first inlet 26 and a first outlet 27 respectively connected with the inlet portion 16 and the outlet portion 17. As shown in fig. 2 and 4, in this patent, an outer edge of one end of the mounting tube 2 is provided with an engaging circular arc boss 24, and correspondingly, an engaging groove 171 corresponding to the engaging circular arc boss 24 is provided in the inlet portion 16 or the outlet portion 17; the engagement groove 171 is provided in the outlet 17, and a throttle valve 172 for controlling the closing of the whole outlet 17 is provided correspondingly on the outlet 17. The sealing groove 25 is arranged at the other end of the installation tube 2 and is used for installing a sealing ring, when the installation is carried out, only the installation tube 2 is needed to be inserted into the valve body 1, until the clamping circular arc boss 24 on the installation tube 2 is buckled into the clamping groove 171, the installation of the installation tube 2 can be realized, meanwhile, the sealing ring at the other end of the installation tube 2 is sealed on the inlet part 16, and when the inlet part 16 is used for feeding fuel gas, the fuel gas can only enter from the first inlet 26 of the installation tube 2 through the sealing ring. The installation tube 2 is provided with a plurality of first air vents 21, two first air vents 21 are arranged on the top of the installation tube 2, the two first air vents are respectively arranged on the top of the installation tube 2 in front of and behind, and are used for connecting the inner cavity of the valve body 1 with the first air vents 21 after the fuel gas is sent into the installation tube 2, and then connecting the first air vents 21 with the installation tube 2 with the first outlet 27 and then communicating the outlet 17.

As shown in fig. 2 and 3, the valve rod 3 includes a sliding portion 31 and a blocking portion 32, the sliding portion 31 is located in the mounting tube 2 and slides along the mounting tube 2, the blocking portion 32 is located outside the mounting tube 2, and the sliding portion 31 blocks the first inlet 26 of the mounting tube 2 when sliding. As shown in fig. 3, the sliding portion 31 is long and is inserted into the mounting tube 2, and slides back and forth when the valve rod 3 is forced; the plugging portion 32 is a circular boss disposed at one end of the sliding portion 31, and has an outer diameter larger than the first inlet 26 of the installation tube 2, so that the plugging portion 32 plugs the first inlet 26 of the installation tube 2 to plug the installation tube 2 when the sliding portion 31 slides, thereby preventing fuel gas from entering the installation tube 2.

As shown in fig. 2 and 3, the linkage rod 41 is disposed in the middle of the valve rod 3, a magnet 43 attracted to the pull rod 14 is disposed at the upper end of the linkage rod 41, and a linkage seat 42 connected to the valve rod 3 is disposed at the lower end of the movable rod; the linkage seat 42 is driven by the linkage rod 41 to move up and down, and is used for simultaneously driving the valve rod 3 to slide in the mounting tube 2. As shown in fig. 4, the mounting tube 2 is provided with a lifting opening 22 for lifting the linkage seat 42, a slot 421 is formed in the linkage seat 42, and is a frame body with a U-shaped cross section, a slot 421 is formed in the middle of the frame body, and inclined sliding slots 422 are formed on the linkage seats 42 on both sides of the slot 421; correspondingly, sliding pins 33 opposite to the inclined sliding grooves 422 are arranged on two sides of the valve rod 3; after the valve rod 3 is installed, it is positioned in the slot 421, and the sliding pins 33 are positioned in the oblique sliding grooves 422 on both sides of the slot 421. The linkage rod 41 is connected to the top of the linkage seat 42, and passes through the lifting opening 22 to be opposite to the pull rod 14, a threaded hole is formed in the center of the linkage rod 41, the threaded hole is used for setting a screw, and the magnet 43 is fixed to the end of the linkage rod 41 through the screw.

In this patent, the magnet 43 is attached to the connecting end of the pull rod 14 to connect the two. When the gas self-closing valve in the patent works, gas sequentially enters the valve body 1 through the mounting tube 2 and the first air vent 21 and is positioned in the diaphragm 13; when the fuel gas supply is reduced, the pressure in the diaphragm 13 is reduced, the diaphragm 13 compresses inwards to drive the pull rod 14 to move downwards, the pull rod 14 moves downwards and drives the linkage rod 41 to move downwards, the linkage rod 41 moves downwards and drives the linkage seat 42 to move downwards, the inclined sliding groove 422 is arranged on the linkage seat 42, the sliding pins 33 are arranged on two sides of the valve rod 3, the upward movement of the linkage seat 42 can be converted into the forward and backward movement of the valve rod 3, so that the valve rod 3 is driven to slide in the mounting tube 2, and the plugging part 32 on the valve rod 3 is plugged on the mounting tube 2, so that the first inlet 26 is closed. After the gas supply of the inlet portion 16 is resumed, since the installation tube 2 is sealed by the blocking portion 32, the gas cannot enter the installation tube 2, and at this time, the pull rod 14 must be manually driven to move upward to move the valve rod 3 to one side to open the first inlet 26 of the installation tube 2, so as to achieve the under-pressure protection of the gas.

In this patent, the opening 11 is further provided with a cover 18 located under the diaphragm 13, and the linkage rod 41 is arranged on the cover 18 in a penetrating manner, so that the magnet 43 is arranged above the cover 18; the cover 18 is further provided with a plurality of second air vents 181, and the fuel gas enters the diaphragm 13 through the second air vents 181. The cover 18 is made of a metal material, and can be attracted to the magnet 43, but the attraction force between the pull rod 14 and the magnet 43 is larger, so that the pull rod 14 and the magnet 43 are attracted normally, and the pull rod 14 drives the linkage rod 41 to move. When the fuel gas supply is increased, the pressure in the diaphragm 13 is increased, the diaphragm 13 expands inwards and outwards to drive the pull rod 14 to move upwards, and the pull rod 14 moves upwards and drives the linkage rod 41 to move upwards; the upward movement of the linkage rod 41 is limited by the sealing cover 18, and the movement stroke of the pull rod 14 is larger than the movement stroke of the linkage rod 41, so that after the pull rod 14 moves to the maximum distance, the pull rod 14 and the magnet 43 are not adsorbed by each other any more due to the too far distance, the magnet 43 is downwards adsorbed on the sealing cover 18, thereby driving the linkage seat 42 to move downwards, and the inclined sliding grooves 422 are arranged on the linkage seat 42, the sliding pins 33 are arranged on two sides of the valve rod 3, and the upward movement of the linkage seat 42 is converted into the backward movement of the valve rod 3, so that the plugging part 32 on the valve rod 3 is plugged on the mounting tube 2, and the first inlet 26 is closed; after the gas supply is restored by the inlet portion 16, since the mounting tube 2 is sealed by the blocking portion 32, the gas cannot enter the mounting tube 2, and at this time, the pull rod 14 must be manually driven to move downward to re-attract the magnet 43, and then the pull rod 14 is pulled upward to move the valve rod 3 to one side to open the first inlet 26 of the mounting tube 2, so as to realize overpressure protection of the gas.

In summary, the present patent realizes the overvoltage protection and the undervoltage protection through the structures of the linkage rod 41 and the linkage seat 42 and the magnet 43; meanwhile, since the valve rod 3, the linkage seat 42 and the linkage rod 41 are installed in the installation pipe 2, the valve rod 3 and the linkage seat 42 do not need to be cast in the valve body 1, so that the manufacturing difficulty of the valve body 1 is reduced, and the manufacturing efficiency of products is improved. Moreover, since the valve rod 3 is basically disposed in the mounting tube 2, the sliding portion 31 is partially protected by the mounting tube 2, and the valve rod 3 is prevented from being corroded by fuel gas after long-term use to affect the quality of the valve rod 3, thereby improving the service life of the valve rod 3.

Moreover, the installation tube 2 in this patent is fixed in through the structure of block circular arc boss 24 in the installation tube 2, only need with the installation tube 2 inserts in the valve body 1 can realize the fixed of installation tube 2, install swiftly convenient, effectively increase product manufacturing efficiency.

Further, a pressing plate 19 is further connected to the pull rod 14, and the pressing plate 19 abuts against the upper end face of the diaphragm 13. The center of the pressing plate 19 is provided with a thread, and is fixed on the pull rod 14 through the thread, so that the pressing plate is used for pressing down the diaphragm 13 better when a user drives the pressing rod, thereby facilitating the resetting of the diaphragm 13.

Further, a guide sliding seat 23 is arranged in the mounting pipe 2, and two sides of the valve rod 3 are positioned on the guide sliding seat 23 and slide; as shown in fig. 4 and 5, two guide sliding seats 23 are provided, which are respectively disposed in the connecting pipes at two sides of the lifting opening 22, and the guide sliding seats 23 are provided with guide sliding grooves for sliding connection with two sides of the valve rod 3, and guide the movement of the valve rod 3 through the connection of the two guide sliding grooves, so that the movement is more stable.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model in this way, therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. A gas self-closing valve, comprising:

the valve comprises a valve body (1), wherein an opening (11) is formed in the top of the valve body (1), a valve cover (12) is arranged on the opening (11), a diaphragm (13) which is sealed on the opening (11) is arranged between the valve cover (12) and the valve body (1), a pull rod (14) is connected to the diaphragm (13), and an operating end (15) which penetrates through the valve cover (12) and is arranged outside the valve cover (12) is arranged on the pull rod (14); an inlet part (16) and an outlet part (17) are also arranged on two sides of the valve body (1);

the mounting pipe (2) is arranged in the valve body (1), and a first inlet (26) and a first outlet (27) which are respectively connected with the inlet part (16) and the outlet part (17) are arranged at two ends of the mounting pipe (2); the mounting pipe (2) is also provided with a plurality of first air vents (21) which are communicated with the inlet part (16), the outlet part (17) and the valve body (1);

the valve rod (3), the valve rod (3) includes sliding part (31) and shutoff portion (32), the said sliding part (31) is located in said mounting tube (2) and slipped along said mounting tube (2), the said shutoff portion (32) is located outside said mounting tube (2), block up on the said first import (26) while the said sliding part (31) slips;

a linkage rod (41), wherein a magnet (43) attracted with the pull rod (14) is arranged at the upper end of the linkage rod (41), and a linkage seat (42) connected with the sliding part (31) is arranged at the lower end of the linkage rod (41); the linkage seat (42) is driven by the linkage rod (41) to move up and down and is used for simultaneously driving the sliding part (31) to slide in the mounting tube (2).

2. The gas self-closing valve as recited in claim 1, wherein: the novel valve is characterized in that a slot (421) is formed in the linkage seat (42), oblique sliding grooves (422) are formed in the linkage seat (42) on two sides of the slot (421), sliding pins (33) are arranged on two sides of the valve rod (3), and when the linkage seat (42) is linked with the valve rod (3), the valve rod (3) is located in the slot (421), and the sliding pins (33) are located in the oblique sliding grooves (422) on two sides of the slot (421).

3. A gas self-closing valve as defined in claim 2, wherein: the mounting pipe (2) is provided with a lifting opening (22) for lifting the linkage seat (42).

4. The gas self-closing valve as recited in claim 1, wherein: the installation pipe (2) is internally provided with a guide sliding seat (23), and two sides of the valve rod (3) are positioned on the guide sliding seat (23) and slide.

5. The gas self-closing valve as recited in claim 1, wherein: the opening (11) is also provided with a sealing cover (18) positioned under the diaphragm (13), the linkage rod (41) is arranged on the sealing cover (18) in a penetrating way, and the magnet (43) is arranged above the sealing cover (18);

the sealing cover (18) is also provided with a plurality of second ventilation openings (181).

6. The gas self-closing valve as recited in claim 1, wherein: the pull rod (14) is also connected with a pressing plate (19), and the pressing plate (19) is propped against the upper end face of the diaphragm (13).

7. The gas self-closing valve as recited in claim 1, wherein: one end of the installation pipe (2) is provided with a clamping circular arc boss (24), a clamping groove (171) corresponding to the clamping circular arc boss (24) is arranged in the inlet part (16) or the outlet part (17), and the other end of the installation pipe (2) is provided with a sealing groove (25) for installing a sealing ring.