Novel gas self-closing valve

Abstract

The utility model discloses a novel gas self-closing valve which structurally comprises a valve body with a gas inlet channel and a gas outlet channel and a valve cover, a gas outlet hole is formed in the position, between the gas inlet channel and the gas outlet channel, in the valve body, and a piston piece is installed in the gas inlet channel. One end of the piston piece extends into the air outlet channel so as to plug or unplug the air outlet hole, a reaction assembly is arranged between the valve deck and the valve body, a first valve rod matched with the reaction assembly is arranged on the valve deck, and the lower end of the first valve rod is connected with a second valve rod. Two movable rolling pieces are rotationally arranged at the matched position of the second valve rod and the piston piece in a left-right corresponding mode; the second valve rod moves up and down to drive the piston piece to move so as to achieve opening and closing of the gas self-closing valve, the movable rolling piece enables the second valve rod and the piston piece to be in rolling contact, abrasion generated by matching of the second valve rod and the piston piece is effectively reduced, and control precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically, to a new type of gas self-closing valve. Background Art

[0002] The pipeline gas self-closing valve is a device installed on the pipeline of a low-pressure gas system. When the gas supply pressure in the pipeline is underpressure or overpressure, it can automatically close without electricity or other external power, and must be manually opened. It is applicable to pipeline natural gas, liquefied petroleum gas, and artificial gas. The basic principle of the pipeline gas self-closing valve is to magnetize permanent magnetic materials according to the design requirements to make a permanent memory multi-pole permanent magnetic linkage mechanism, identify the changes in the gas pressure parameters passing through it, and automatically close the valve when the safety setting value is exceeded to cut off the gas source.

[0003] At present, Chinese Patent with the publication (announcement) number CN208565693U discloses a pipeline gas self-closing valve. In this pipeline gas self-closing valve, a two-stage magnetic core and a piston part cooperating with it are installed. A spring is also arranged on the piston part. The piston part moves along a preset direction under the drive of the spring force and gas pressure, and blocks the gas outlet at the limit position, realizing the automatic closing of the gas self-closing valve in the low-pressure or pressure-loss state; among them, the first valve rod 123 drives the piston part 124 to move by moving up and down to realize the opening and closing of the self-closing valve. However, when the first valve rod 123 moves, it generates sliding friction with the piston part 124, and the contact positions of the first valve rod 123 and the piston part 124 will be worn during long-term use, thus affecting the control accuracy. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a new type of gas self-closing valve to solve the above technical problems.

[0005] To achieve the above purpose, the present utility model provides the following technical solution: A new type of gas self-closing valve, including a valve body with an air inlet channel and an air outlet channel and a valve cover. An air outlet hole is formed inside the valve body between the air inlet channel and the air outlet channel. A piston part is installed in the air inlet channel. One end of the piston part extends into the air outlet channel to block or cancel the blockage of the air outlet hole. A reaction component is arranged between the valve cover and the valve body, and a first valve rod cooperating with the reaction component is arranged on the valve cover. The lower end of the first valve rod is connected with a second valve rod, and two movable rolling parts are rotatably arranged corresponding to the left and right at the cooperation position of the second valve rod and the piston part.

[0006] The present utility model is further arranged as: The reaction component includes an elastic diaphragm, a pressing piece, and a tightening nut for fixing the elastic diaphragm and the first valve rod. The elastic diaphragm is limited when the valve cover is installed.

[0007] The present utility model is further configured as follows: The upper end of the first valve rod extends outside the valve cover and is connected with a lifting knob, and the first valve rod and the second valve rod are magnetically connected through a magnetic member.

[0008] The present utility model is further configured as follows: A guiding member is arranged at the corresponding position of the second valve rod at the inner bottom of the air inlet passage.

[0009] The present utility model is further configured as follows: The piston member includes a piston head and an elastic member. The elastic member includes a sliding portion and a connecting portion. The elastic member is connected with the piston head through the connecting portion. A sliding section adapted to the sliding portion is formed at the inner bottom of the air inlet passage, and an inclined waist adapted to the movable rolling member is formed at one end of the sliding portion.

[0010] The present utility model is further configured as follows: A retaining ring is formed on the outer circle of the connecting portion, and a spring member is sleeved between the outer circle of the connecting portion and the side wall of the air outlet hole between the retaining ring and the air outlet hole.

[0011] The present utility model is further configured as follows: The air outlet hole has a flared structure. The piston head is formed with a sealing portion adapted to the air outlet hole. At least one accommodating groove is formed in the sealing portion, and a sealing ring is arranged in the accommodating groove.

[0012] The present utility model is further configured as follows: A ring groove is formed at one end of the air outlet hole close to the air outlet passage, and a sealing convex ring adapted to the ring groove is formed on the piston head.

[0013] To sum up, the present utility model has the following beneficial effects: The present utility model drives the piston member to move through the up-and-down movement of the second valve rod to realize the opening and closing of the gas self-closing valve. The movable rolling member makes the second valve rod and the piston member in rolling contact, effectively reducing the wear generated by the cooperation between the second valve rod and the piston member, and ensuring the control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 It is a schematic diagram of the cooperation between the piston member and the air outlet hole of the present utility model.

[0017] Figure numerals: 1. air inlet channel; 10. air outlet channel; 11. valve body; 12. valve cover; 13. air outlet hole; 2. piston member; 20. piston head; 21. elastic member; 22. sliding portion; 23. connecting portion; 24. sliding interval; 25. inclined waist; 26. retaining ring; 27. spring member; 3. first valve stem; 30. second valve stem; 31. movable roller; 32. lifting button; 33. magnetic member; 4. elastic diaphragm; 40. pressing plate; 41. tightening nut; 5. sealing portion; 50. accommodating groove; 51. sealing ring; 52. ring groove; 53. sealing convex ring; 6. guide member. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-2 As shown, a new type of gas self-closing valve of an embodiment of the utility model comprises a valve body 11 having an air inlet channel 1 and an air outlet channel 10 and a valve cover 12, an air outlet hole 13 is formed inside the valve body 11 between the air inlet channel 1 and the air outlet channel 10, a piston member 2 is installed in the air inlet channel 1, one end of the piston member 2 extends into the air outlet channel 10 to achieve blocking or unblocking of the air outlet hole 13, a reaction component is arranged between the valve cover 12 and the valve body 11, and a first valve stem 3 cooperating with the reaction component is arranged on the valve cover 12, a second valve stem 30 is connected to the lower end of the first valve stem 3, and two movable rollers 31 are rotatably arranged at the left and right corresponding positions of the second valve stem 30 and the piston member 2.

[0020] When in use, the staff first drives the first valve stem 3 and the second valve stem 30 magnetically connected to the second valve stem 30 to move toward the valve cover 12. At this time, the reaction component is in a normal working state, and the second valve stem 30 moves through the movable roller 31 to push the piston member 2 to move in a preset direction. At this time, the piston member 2 cancels the blockage of the gas outlet 13, and the gas inlet channel 1 is connected with the gas outlet channel 10, and the gas self-closing valve works normally; when the gas pipeline leaks, the reaction component reacts and drives the first valve stem 3 and the second valve stem 30 to retreat to the initial position, at this time, the piston member 2 blocks the gas outlet 13, and the pipeline gas self-closing valve 100 is closed; when the gas pipeline is accidentally over-high pressure, the piston member 2 will also drive the piston member 2 to block the gas outlet 13;

[0021] The utility model realizes the opening and closing of the gas self - closing valve by driving the piston member 2 to move up and down through the second valve stem 30. The movable rolling member 31 enables the second valve stem 30 and the piston member 2 to be in rolling contact, effectively reducing the wear generated by the cooperation between the second valve stem 30 and the piston member 2 and ensuring the control accuracy.

[0022] The reaction assembly includes an elastic diaphragm 4, a pressing piece 40, and a tightening nut 41 for fixing the elastic diaphragm 4 to the first valve stem 3. The valve cover 12 limits the elastic diaphragm 4 in the installed state; the upper end of the first valve stem 3 extends outside the valve cover 12 and is connected with a lifting knob 32. The first valve stem 3 and the second valve stem 30 are magnetically connected through a magnetic member 33.

[0023] During use, the valve cover 12 limits the elastic diaphragm 4 in the installed state, and the elastic diaphragm 4 completely covers the upper opening of the air inlet passage 1; the first valve stem 3 and the second valve stem 30 are driven by the lifting knob 32.

[0024] When the staff pulls the lifting knob 32, the elastic diaphragm 4 connected to the first valve stem 3 bulges, so that the reaction assembly is in a working state. When gas leakage or an accidental over - high pressure occurs in the gas pipeline, the elastic diaphragm 4 drives the first valve stem 3, the second valve stem 30, and the piston member 2 to react and achieve self - closing.

[0025] A guide member 6 is arranged at the bottom inside the air inlet passage 1 corresponding to the second valve stem 30.

[0026] During use, the movement of the second valve stem 30 is guided by the guide member 6 to ensure the movement stability of the second valve stem 30.

[0027] The piston member 2 includes a piston head 20 and an elastic member 21. The elastic member 21 includes a sliding part 22 and a connecting part 23. The elastic member 21 is connected to the piston head 20 through the connecting part 23. A sliding section 24 adapted to the sliding part 22 is formed at the bottom inside the air inlet passage 1. One end of the sliding part 22 is formed with an inclined waist 25 for cooperating with the movable rolling member 31; a retaining ring 26 is formed on the outer circle of the connecting part 23, and a spring member 27 is sleeved between the outer circle of the connecting part 23 and the side wall of the air outlet hole 13 between the retaining ring 26.

[0028] During use, when the lifting knob 32 drives the second valve stem 30 to move radially upward in a preset direction, the second valve stem 30 drives the sliding part 22 to slide radially leftward through the rolling cooperation between the movable rolling member 31 and the sliding part 22 and the sliding cooperation between the sliding part 22 and the sliding section 24. The sliding part 22 drives the piston head 20 to move through the connecting part 23 so that the piston head 20 is separated from the air outlet hole 13. At this time, the gas self - closing valve works normally, and the spring member 27 is in a compressed state.

[0029] When the operator releases the lifting button 32, the force exerted by the gas acting on the elastic diaphragm 4 and the spring member 27 acting on the piston member 2 is balanced, thereby causing the first valve stem 3 and the second valve stem 30 to be in the equilibrium position, and at this time the pipeline gas valve works normally; when gas leakage or an accidental over-high pressure situation in the gas pipeline occurs, the elastic diaphragm 4 drives the first valve stem 3 and the second valve stem 30 to move downward. At this time, the piston member 2 retreats to the initial position due to the energy storage release of the elastic member 21 and forms a seal for the air outlet hole 13, achieving self-closure;

[0030] Wherein, two movable rolling members 31 are correspondingly arranged on the left and right of the second valve stem 30. When one of the movable rolling members 31 is damaged, the second valve stem 30 can be rotated to work normally, which is convenient for the daily maintenance and replacement of the gas self-closing valve.

[0031] The air outlet hole 13 has a flared structure. The piston head 20 is formed with a sealing portion 5 adapted to the air outlet hole 13. The sealing portion 5 is formed with at least one accommodating groove 50 and a sealing ring 51 is arranged in the accommodating groove 50; a ring groove 52 is formed at one end of the air outlet hole 13 close to the air outlet channel 10, and the piston head 20 is formed with a sealing convex ring 53 adapted to the ring groove 52.

[0032] During use, when the piston head 20 is in the sealing state, a soft seal is formed between the sealing ring 51 and the air outlet hole 13, and a hard seal is formed between the ring groove 52 and the sealing convex groove. Through the double guarantee of the soft seal and the hard seal, the sealing effect of the piston head 20 is ensured.

[0033] At the same time, it should be pointed out that the terms used in the present invention, such as: "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention.

[0034] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A novel gas self - closing valve, comprising a valve body (11) having an air inlet passage (1) and an air outlet passage (10), and a valve cover (12), characterized in that: An air outlet hole (13) is formed inside the valve body (11) between the air inlet passage (1) and the air outlet passage (10). A piston member (2) is installed in the air inlet passage (1). One end of the piston member (2) extends into the air outlet passage (10) to block or unblock the air outlet hole (13). A reaction component is arranged between the valve cover (12) and the valve body (11), and a first valve rod (3) cooperating with the reaction component is arranged on the valve cover (12). A second valve rod (30) is connected to the lower end of the first valve rod (3). Two movable rolling members (31) are rotatably arranged corresponding to the left and right sides of the cooperation position between the second valve rod (30) and the piston member (2).

2. The novel gas self-closing valve according to claim 1, wherein: The reaction component includes an elastic diaphragm (4), a pressing piece (40), and a tightening nut (41) for fixing the elastic diaphragm (4) to the first valve rod (3). The valve cover (12) limits the elastic diaphragm (4) in the installed state.

3. The novel gas self-closing valve according to claim 2, characterized in that: The upper end of the first valve rod (3) extends outside the valve cover (12) and is connected with a lifting knob (32). The first valve rod (3) and the second valve rod (30) are magnetically connected by a magnetic member (33).

4. The novel gas self-closing valve according to claim 1, characterized in that: A guide member (6) is arranged at the bottom inside the air inlet passage (1) corresponding to the second valve rod (30).

5. The novel gas self-closing valve according to claim 1, characterized in that: The piston member (2) includes a piston head (20) and an elastic member (21). The elastic member (21) includes a sliding part (22) and a connecting part (23). The elastic member (21) is connected to the piston head (20) through the connecting part (23). A sliding interval (24) adapted to the sliding part (22) is formed at the bottom inside the air inlet passage (1). An inclined waist (25) cooperating with the movable rolling member (31) is formed at one end of the sliding part (22).

6. The novel gas self-closing valve according to claim 5, characterized in that: A retaining ring (26) is formed on the outer circle of the connecting part (23). A spring member (27) is sleeved between the outer circle of the connecting part (23) and the side wall of the air outlet hole (13) between the retaining ring (26) and the retaining ring (26).

7. The novel gas self-closing valve according to claim 6, wherein: The air outlet hole (13) has a horn-shaped structure. A sealing part (5) adapted to the air outlet hole (13) is formed on the piston head (20). At least one accommodation groove (50) is formed in the sealing part (5), and a sealing ring (51) is arranged in the accommodation groove (50).

8. The novel gas self - closing valve according to claim 7, wherein: A ring groove (52) is formed at one end of the air outlet hole (13) close to the air outlet passage (10). A sealing convex ring (53) adapted to the ring groove (52) is formed on the piston head (20).

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