Improved gas self-closing valve

Abstract

The utility model discloses an improved gas self-closing valve which structurally comprises a valve body and a valve cover, a gas inlet channel and a gas outlet channel are formed in the valve body, a gas passing hole is formed between the gas inlet channel and the gas outlet channel, a partition plate is formed in the gas outlet channel, and a gas outlet hole is formed in the partition plate. A sealing sleeve is installed in the air outlet hole, a sealing plug is movably arranged in the sealing sleeve, the sealing plug is arranged in the sealing sleeve in a sliding mode through a guide assembly to form hard sealing and soft sealing with the sealing sleeve, and a driving assembly used for promoting the sealing plug and the sealing sleeve to be plugged or unplugged is arranged on the inner side of the valve deck. According to the self-closing valve, the sealing plug and the sealing kit are driven by the driving assembly to form sealing or cancel sealing, and a soft sealing structure and a hard sealing structure are arranged between the sealing plug and the sealing kit at the same time, so that the sealing effect of the self-closing valve in the closed state is effectively guaranteed, leakage is avoided, and the use safety of products is improved.

Description

Technical Field

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

[0002] The pipeline gas self-closing valve, referred to as the self-closing valve, is usually installed on the pipeline of the low-pressure gas system. It is a device that can automatically close and need to be opened manually when the pipeline gas supply pressure is under-pressure or over-pressure, without electricity or other external power. It is suitable for pipeline natural gas, liquefied petroleum gas, artificial coal gas, etc.

[0003] At present, a Chinese patent with a publication (announcement) number of CN214617860U discloses a pipeline gas self-closing valve gas device, which includes a valve seat body, an upper valve stem and a push block, a valve cover body is installed on the upper end of the valve seat body, a reset cover is installed on the upper end of the valve cover body, and the lower end of the reset cover is connected to the upper valve stem arranged inside the upper air cavity, a connecting block is provided at the lower end of the upper valve stem, and a valve disc is connected to the outer surface of the connecting block, a lower valve stem is provided at the lower end of the connecting block, a push block is provided at the lower end of the lower valve stem, and a telescopic rod is hingedly connected to the right end of the push block, a swing rod is connected to the left end of the push block, and a connecting rod is provided at the left end of the swing rod, and a connecting seat arranged on the outer side of the connecting rod is installed on the inner surface of the valve seat body;

[0004] When the above-mentioned "pipeline gas self-closing valve gas device" is in the closed valve state, a connecting seat 15 is provided on the inner surface of the valve seat body 1, and the filling block 1401 is snap-fitted with the connecting seat 15 through the connecting groove 1402, and the valve mouth sealing block 14 is moved rightward to snap-fit ​​with the connecting seat 15 to seal and block the gas. However, relying solely on the connecting seat 15 and the valve mouth sealing block 14 to provide a single sealing effect results in poor sealing performance and is prone to leakage. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an improved gas self-closing valve to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an improved gas self-closing valve, including a valve body and a valve cover, an air inlet channel and an air outlet channel are formed in the valve body, an air hole is provided between the air inlet channel and the air outlet channel, a partition is formed in the air outlet channel and the partition is provided with an air outlet hole, a sealing kit is installed in the air outlet hole and a sealing plug is movably provided in the sealing kit, the sealing plug is slidably provided in the sealing kit through a guide assembly to form a hard seal and a soft seal with the sealing kit, and a driving assembly is provided on the inner side of the valve cover for prompting the sealing plug to block or cancel the blockage with the sealing kit.

[0007] The utility model is further configured as follows: the sealing kit is threadedly connected and matched with the air outlet hole and is formed with a tightening portion.

[0008] The utility model is further configured as follows: the sealing plug is respectively formed with a first annular groove and a second annular groove for accommodating a sealing ring, a first protrusion is formed between the first annular groove and the second annular groove, and a second protrusion and a third protrusion are formed on the inner side of the sealing kit.

[0009] The utility model is further configured as follows: the guide assembly includes a sliding section formed in the air outlet channel and a sliding column located in the sliding section, limiting rings are formed at both ends of the sliding column, a spring member is sleeved on the outer ring of the sliding column between one of the limiting rings and the outer opening of the sliding section, one end of the sliding column is fixedly connected to the sealing plug and a matching inclined waist is formed at the other end.

[0010] The utility model is further configured as follows: the drive assembly includes an upper valve stem and the lower end of the upper valve stem is connected to a connecting block, the outer surface of the connecting block is connected to an elastic diaphragm, the lower end of the connecting block is connected to a lower valve stem and the lower valve stem is connected to a magnet installed on the lower surface of the connecting block, and the front end of the lower valve stem is formed with a matching column adapted to the matching oblique waist.

[0011] The utility model is further configured as follows: a guide portion is formed at the lower end of the lower valve stem and a guide sleeve adapted to the guide portion is formed at the bottom of the air outlet channel.

[0012] The utility model is further configured as follows: a lifting button is connected to the upper end of the upper valve stem.

[0013] To sum up, the utility model has the following beneficial effects: the utility model drives the sealing plug and the sealing kit to form a seal or cancel the seal through the driving component, and there are both a soft sealing structure and a hard sealing structure between the sealing plug and the sealing kit, thereby effectively ensuring the sealing effect of the self-closing valve in the closed state, avoiding leakage, and improving the safety of product use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

[0016] Figure 2 This is a schematic diagram of the structure of the guide assembly of the utility model;

[0017] Figure 3 This is a schematic diagram of the cooperation between the sealing plug and the sealing kit of the utility model;

[0018] Figure 4 for Figure 3 A schematic diagram of the enlarged local structure at point A in the middle.

[0019] Attached figures: 1. valve body; 10. valve cover; 11. air inlet passage; 12. air outlet passage; 13. air hole; 2. partition; 20. air outlet; 3. sealing kit; 30. sealing plug; 31. tightening part; 32. first ring groove; 33. second ring groove; 34. first protrusion; 35. second protrusion; 36. third protrusion; 37. sealing ring; 4. sliding interval; 40. sliding column; 41. limiting ring; 42. spring member; 43. matching waist; 5. upper valve stem; 50. connecting block; 51. elastic diaphragm; 52. lower valve stem; 53. magnet; 54. matching column; 55. guide part; 56. guide sleeve; 57. lifting button. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-4 As shown, an improved gas self-closing valve of an embodiment of the utility model includes a valve body 1 and a valve cover 10, an air inlet channel 11 and an air outlet channel 12 are formed in the valve body 1, an air hole 13 is provided between the air inlet channel 11 and the air outlet channel 12, a partition 2 is formed in the air outlet channel 12 and the partition 2 is provided with an air outlet 20, a sealing kit 3 is installed in the air outlet 20 and a sealing plug 30 is movably provided in the sealing kit 3, the sealing plug 30 is slidably provided in the sealing kit 3 through a guide component to form a hard seal and a soft seal with the sealing kit 3, and a driving component for prompting the sealing plug 30 to block or cancel the blockage with the sealing kit 3 is provided on the inner side of the valve cover 10.

[0022] When in use, the driving component is used to drive the sealing plug 30 and the sealing kit 3 to form a seal or cancel the seal. The sealing plug 30 and the sealing kit 3 have both a soft sealing structure and a hard sealing structure, thereby effectively ensuring the sealing effect of the self-closing valve in the closed state, avoiding leakage, and improving the safety of product use.

[0023] The sealing kit 3 is threadedly connected to the air outlet 20 and is formed with a pressing portion 31 .

[0024] When in use, the sealing kit 3 is tightened with the air outlet 20 until the abutting portion 31 is tightly fitted with the outer surface of the air outlet 20, and the installation and fixation of the sealing kit 3 is completed. The outer ring of the sealing kit 3 has an external thread, and the inner ring of the air outlet 20 has an internal thread;

[0025] The sealing kit 3 is detachable and connected for easy daily maintenance and replacement;

[0026] A sealing rubber ring is provided on the outer peripheral surface of the air outlet hole 20 and the matching side of the abutting portion 31 , which effectively improves the sealing effect between the sealing kit 3 and the air outlet hole 20 .

[0027] The sealing plug 30 is formed with a first annular groove 32 and a second annular groove 33 for accommodating the sealing ring 37 , a first protrusion 34 is formed between the first annular groove 32 and the second annular groove 33 , and a second protrusion 35 and a third protrusion 36 are formed inside the sealing kit 3 .

[0028] When in use, when the sealing plug 30 and the sealing kit 3 are in a blocked state, the sealing ring 37 in the first annular groove 32 abuts against the second protrusion 35 to form a first layer of soft seal, the sealing ring 37 in the second annular groove 33 abuts against the outer opening side of the sealing kit 3 to form a second layer of soft seal, and the first protrusion 34 and the third protrusion 36 are in hard contact to form a hard seal. The sealing effect of both the sealing plug 30 and the sealing kit 3 is effectively guaranteed by the two layers of soft seals and the hard seal located between the two soft seals.

[0029] The guide assembly includes a sliding section 4 formed in the air outlet channel 12 and a sliding column 40 located in the sliding section 4. Limiting rings 41 are formed at both ends of the sliding column 40. The outer ring of the sliding column 40 is located between one of the limiting rings 41 and the outer opening of the sliding section 4, and a spring member 42 is sleeved thereon. One end of the sliding column 40 is fixedly connected to the sealing plug 30 and the other end is formed with a matching inclined waist 43.

[0030] When in use, the movable path of the sealing plug 30 is limited by the cooperation between the sliding zone 4 and the sliding column 40 and the limiting cooperation of the two limiting rings 41, so that it can achieve blocking or canceling blocking more stably.

[0031] The driving assembly includes an upper valve stem 5 and a connecting block 50 is connected to the lower end of the upper valve stem 5, an elastic diaphragm 51 is connected to the outer surface of the connecting block 50, a lower valve stem 52 is connected to the lower end of the connecting block 50 and the lower valve stem 52 is connected to a magnet 53 installed on the lower surface of the connecting block 50, and a matching column 54 adapted to the matching waist 43 is formed at the front end of the lower valve stem 52.

[0032] When in use, the staff pulls up the lifting button 57, driving the upper valve stem 5 and the lower valve stem 52 connected to the upper valve stem 5 to move toward the valve cover 10 along the first preset direction. At this time, the elastic diaphragm 51 is pulled to bulge, and the matching column 54 on the lower valve stem 52 pushes the sealing plug 30 to move along the second preset direction through the matching between the matching waist 43. At this time, the sealing plug 30 is out of contact with the sealing kit 3. At this time, the air inlet channel 11 and the air outlet channel 12 remain connected to each other, and the spring member 42 is compressed. At this time, the pressure generated when the gas is conducted acts on the elastic diaphragm 51;

[0033] Then, the staff releases the lifting button 57. At this time, the force of the gas acting on the elastic diaphragm 51 and the force of the spring acting on the sealing plug 30 are balanced, so that the upper valve stem 5 and the lower valve stem 52 are maintained in a balanced position, the air inlet channel 11 and the air outlet channel 12 remain connected to each other, and the gas self-closing valve works normally;

[0034] When the gas pipeline leaks, the gas pressure entering the self-closing valve will decrease, the force of the gas on the elastic diaphragm 51 will decrease, and the previously compressed spring member 42 will push the sealing plug 30 to re-contact the gas outlet 20, and the pipeline gas self-closing valve will close;

[0035] When the gas pipeline accidentally reaches ultra-high pressure, the gas pressure in the air inlet passage 11 is extremely high, and the force exerted by the gas on the elastic diaphragm 51 increases sharply. When this force is greater than the magnetic force between the upper valve stem 5 and the lower valve stem 52, the upper valve stem 5 and the lower valve stem 52 are separated, and the compressed spring member 42 pushes the sealing plug 30 to re-contact the air outlet 20, and the pipeline gas self-closing valve is closed.

[0036] A guide portion 55 is formed at the lower end of the lower valve stem 52 , and a guide sleeve 56 adapted to the guide portion 55 is formed at the inner bottom of the air outlet passage 12 .

[0037] When in use, the cooperation between the guide portion 55 and the guide sleeve 56 provides guidance for the movement of the lower valve stem 52, so that the movement of the lower valve stem 52 is more stable, thereby ensuring the working stability of the product.

[0038] The upper end of the upper valve stem 5 is connected with a lifting button 57 .

[0039] When in use, the lifting button 57 provides a stable force point for driving the upper valve stem 5 .

[0040] It should also be pointed out that the terms used in the present invention, such as “front”, “rear”, “vertical”, “horizontal”, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0041] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An improved gas self-closing valve, comprising a valve body (1) and a valve cover (10), wherein an air inlet channel (11) and an air outlet channel (12) are formed in the valve body (1), and an air hole (13) is provided between the air inlet channel (11) and the air outlet channel (12), wherein: A partition (2) is formed in the air outlet channel (12) and the partition (2) is provided with an air outlet hole (20). A sealing kit (3) is installed in the air outlet hole (20) and a sealing plug (30) is movably arranged in the sealing kit (3). The sealing plug (30) is slidably arranged in the sealing kit (3) through a guide component to form a hard seal and a soft seal with the sealing kit (3). A driving component is provided on the inner side of the valve cover (10) for causing the sealing plug (30) to block or cancel the blockage with the sealing kit (3).

2. The improved gas self-closing valve according to claim 1 is characterized in that: The sealing kit (3) is threadedly connected to the air outlet hole (20) and is formed with a tightening portion (31).

3. The improved gas self-closing valve according to claim 2 is characterized in that: The sealing plug (30) is respectively formed with a first annular groove (32) and a second annular groove (33) for accommodating a sealing ring (37); a first protrusion (34) is formed between the first annular groove (32) and the second annular groove (33); and a second protrusion (35) and a third protrusion (36) are formed on the inner side of the sealing kit (3).

4. The improved gas self-closing valve according to claim 1 is characterized in that: The guide assembly comprises a sliding section (4) formed in the air outlet channel (12) and a sliding column (40) located in the sliding section (4); limit rings (41) are formed at both ends of the sliding column (40); a spring member (42) is sleeved on the outer ring of the sliding column (40) between one of the limit rings (41) and the outer opening of the sliding section (4); one end of the sliding column (40) is fixedly connected to the sealing plug (30) and the other end is formed with a matching inclined waist (43).

5. The improved gas self-closing valve according to claim 1 is characterized in that: The driving assembly comprises an upper valve stem (5) and a connecting block (50) is connected to the lower end of the upper valve stem (5), an elastic diaphragm (51) is connected to the outer surface of the connecting block (50), a lower valve stem (52) is connected to the lower end of the connecting block (50), and the lower valve stem (52) is connected to a magnet (53) installed on the lower surface of the connecting block (50), and a matching column (54) adapted to the matching waist (43) is formed at the front end of the lower valve stem (52).

6. The improved gas self-closing valve according to claim 5 is characterized in that: A guide portion (55) is formed at the lower end of the lower valve stem (52), and a guide sleeve (56) adapted to the guide portion (55) is formed at the inner bottom of the air outlet channel (12).

7. The improved gas self-closing valve according to claim 6 is characterized in that: The upper end of the upper valve stem (5) is connected with a lifting button (57).

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