Gas stop valve for fire engineering

Abstract

The gas stop valve for the fire engineering comprises a valve shell of a cylindrical structure, the left end and the right end of the valve shell are fixedly installed on a gas conveying pipeline through butt flanges, and first sealing rings are fixedly installed on the outer surfaces of the butt flanges; a mounting seat is fixedly arranged in the middle of the upper surface of the valve shell, a valve element plate located in the valve shell is rotatably mounted at the lower end of the mounting seat, and a rotating air cylinder used for driving the valve element plate to act is fixedly mounted above the mounting seat. Second sealing rings are installed on the outer surface of the valve element plate, and the two second sealing rings are symmetrically arranged. According to the air stopping valve for the fire engineering, the novel structural design is adopted, the second sealing ring outside the valve element plate is made of an elastic hollow rubber material, and therefore the expansion degree of the second sealing ring can be changed in an air exhaust and air inflation mode, air inflation is carried out during closing to improve the sealing performance, and air exhaust is carried out during rotating to reduce friction with the inner wall of the valve.

Description

Technical Field

[0001] This utility model relates to the field of fire protection engineering technology, specifically to a gas shut-off valve for fire protection engineering. Background Technology

[0002] Fire protection engineering is a professional field with the core objective of preventing, controlling, and extinguishing fires and reducing the harm of fires to people, property, and the environment. It covers fire prevention, monitoring, alarm, fire extinguishing, evacuation, and post-disaster response. The laying of gas pipelines is very common in fire protection engineering (such as the gas supply pipelines of gas extinguishing equipment). Gas pipelines are generally controlled by gas shut-off valves.

[0003] In the prior art, Chinese Patent Application No. CN201921144298.8 discloses a gas-stop valve for fire protection engineering, including a gas-stop valve, a flange fixedly connected to the side end of the gas-stop valve, an intermediate connecting structure fixedly connected to the lower end of the gas-stop valve, a buffer pad structure movably connected to the lower end of the intermediate connecting structure, a buffer spring fixedly connected to the lower end of the buffer pad structure, and a base structure fixedly connected to the lower end of the buffer spring. By setting the intermediate connecting structure, the gas-stop valve can be connected to the buffer pad structure through a screw hole. By setting the screw hole to be lower than the horizontal position of the flange, the screw hole can be directly connected to the ground without affecting the use of the flange. By setting the length of the support connector to be less than the distance between the two flanges, the support connector does not affect the use of the flange. The intermediate connecting structure and the buffer pad structure are detachable by being connected by threads.

[0004] Based on the above information, it can be seen that butterfly valves can be used as check valves in the prior art. However, in actual use, a sealing ring is generally required to be installed on the outside of the valve core plate of the check valve to improve the sealing performance. However, long-term opening and closing will cause the sealing ring to rub against the inner wall of the valve, resulting in wear and affecting the overall sealing performance of the valve. Utility Model Content

[0005] The purpose of this utility model is to provide a gas shut-off valve for fire protection engineering, so as to solve the problem of sealing performance being affected by the wear of the sealing ring mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a gas shut-off valve for fire protection engineering, comprising a valve housing with a cylindrical structure, wherein the left and right ends of the valve housing are fixedly installed to a gas pipeline via connecting flanges, and a first sealing ring is fixedly installed on the outer surface of the connecting flanges; a mounting seat is fixedly disposed at the middle position of the upper surface of the valve housing, and a valve core plate located inside the valve housing is rotatably mounted at the lower end of the mounting seat, and a rotary cylinder for driving the valve core plate is fixedly installed above the mounting seat; a second sealing ring is installed on the outer surface of the valve core plate, and two second sealing rings are symmetrically arranged, and a gas supply mechanism for inflating the second sealing rings is fixedly installed on the lower surface of the valve housing.

[0007] Preferably, the air supply mechanism includes a small air pump fixedly installed at the middle position of the lower surface of the valve housing, and a connecting pipe is fixedly installed at the upper end interface of the small air pump.

[0008] Preferably, the valve core plate is configured as a hollow structure, and the upper end of the connecting pipe penetrates into the interior of the valve core plate, and the connecting pipe is rotatably connected to the valve core plate.

[0009] Preferably, the valve core plate has equally spaced connection holes on its side, and the second sealing ring is made of hollow elastic rubber.

[0010] Preferably, a connecting air nozzle is fixedly installed on the inner side of the second sealing ring and communicates with it, and the connecting air nozzle and the connecting hole are engaged with each other.

[0011] Preferably, connecting rings are rotatably installed at the left and right ends of the valve housing, and a mounting bracket with a "7" shaped structure is fixedly installed on the outside of the connecting rings, and a gas sensor is fixedly installed on the upper end of the mounting bracket.

[0012] Preferably, the connecting ring is provided with a friction roller that rubs against it, and the friction roller is driven by a drive motor that is fixedly installed inside the mounting base.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the gas shut-off valve for fire protection engineering adopts a novel structural design, the specific details of which are as follows:

[0014] 1. The valve core plate is driven to rotate by a rotary cylinder to realize the opening and closing operation of the valve. The second sealing ring outside the valve core plate is made of elastic hollow rubber material, so the expansion degree of the second sealing ring can be changed by air extraction and air inflation. When closing, air inflation improves the sealing performance, and air extraction reduces friction with the inner wall of the valve when rotating.

[0015] Furthermore, the second sealing ring is fixedly installed on the outside of the valve core plate by engaging with the connecting nozzle and the connecting hole. The connecting nozzle allows the second sealing ring to communicate with the inside of the valve core plate, so that the second sealing ring can be evacuated or inflated by a small air pump.

[0016] 2. An external mounting plate is installed on the valve housing. A mounting bracket is installed on the outside of the mounting plate to fix the gas sensor on the mounting bracket. Gas detection is performed at the connection between the valve housing and the gas pipeline to achieve the purpose of detecting leaks.

[0017] Furthermore, the drive motor inside the mounting base drives the friction roller to rotate, and the friction of the friction roller drives the connecting ring to rotate, thereby causing the connecting ring to drive the mounting bracket and the gas sensor to rotate circumferentially, achieving the purpose of all-round detection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the valve housing installation structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the valve housing structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the valve core plate structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the valve core plate of this utility model;

[0022] Figure 5 This is a schematic diagram of the second sealing ring structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the friction roller structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the gas sensor structure of this utility model.

[0025] In the diagram: 1. Valve housing; 2. Connecting flange; 201. First sealing ring; 3. Gas pipeline; 4. Mounting base; 5. Valve core plate; 501. Connecting hole; 6. Rotary cylinder; 7. Second sealing ring; 701. Connecting nozzle; 8. Small air pump; 9. Connecting pipe; 10. Connecting ring; 11. Mounting bracket; 12. Gas sensor; 13. Friction roller; 14. Drive motor. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: Please refer to Figures 1-3 In order to achieve the purpose of controlling opening and closing, this embodiment provides the following technical solution, specifically disclosing: a valve housing 1 with a cylindrical structure, the left and right ends of the valve housing 1 are fixedly installed with the gas pipeline 3 by the docking flange 2, and a first sealing ring 201 is fixedly installed on the outer surface of the docking flange 2; a mounting seat 4 is fixedly set at the middle position of the upper surface of the valve housing 1, and a valve core plate 5 located inside the valve housing 1 is rotatably installed at the lower end of the mounting seat 4, and a rotary cylinder 6 for driving the valve core plate 5 is fixedly installed above the mounting seat 4; a second sealing ring 7 is installed on the outer surface of the valve core plate 5.

[0028] When installing the valve, firstly, the valve housing 1 is fixed in the gas pipeline 3 using bolts and connecting flange 2 (the first sealing ring 201 on the side of the connecting flange 2 provides an effective sealing effect). Then, the power supply of each part (including rotary cylinder 6, small air pump 8 and drive motor 14) is directly connected in sequence. When it is necessary to control the opening and closing of the valve, the rotary cylinder 6 is opened, which drives the valve core plate 5 to rotate, thereby rotating the valve core plate 5 to a specified angle to realize the opening and closing of the valve.

[0029] Example 2: Please refer to Figures 3-5 In order to reduce the wear of the sealing ring and improve the sealing performance, this embodiment provides the following technical solution, which specifically discloses: two second sealing rings 7 are symmetrically arranged, and an air supply mechanism for inflating the second sealing rings 7 is fixedly installed on the lower surface of the valve housing 1. The air supply mechanism includes a small air pump 8 fixedly installed in the middle position of the lower surface of the valve housing 1, and a connecting pipe 9 is fixedly installed at the upper end interface of the small air pump 8. The valve core plate 5 is set as a hollow structure, and the upper end of the connecting pipe 9 penetrates into the interior of the valve core plate 5. The connecting pipe 9 is rotatably connected to the valve core plate 5. The valve core plate 5 has connecting holes 501 with equal spacing on its side. The second sealing ring 7 is made of hollow elastic rubber material. A connecting air nozzle 701 is fixedly installed on the inner side of the second sealing ring 7 and communicates with it. The connecting air nozzle 701 and the connecting hole 501 are correspondingly engaged.

[0030] A second sealing ring 7 is installed on the outside of the valve core plate 5 to improve its sealing performance. When installing the second sealing ring 7, the connecting nozzle 701 on its inner side is aligned with the connecting hole 501 opened on the outer surface of the valve core plate 5. Then, the connecting nozzle 701 is inserted into the connecting hole 501 to form a lock, thereby fixing the second sealing ring 7. At this time, the second sealing ring 7 is connected to the inside of the valve core plate 5. Before the valve core plate 5 is rotated to open the valve, the small air pump 8 is turned on. At this time, the small air pump 8 draws out the air inside the second sealing ring 7 through the connecting pipe 9, causing the second sealing ring 7 to contract, thereby reducing the contact friction between the second sealing ring 7 and the inner wall of the valve housing 1. After the valve core plate 5 is rotated to close the valve, the small air pump 8 is turned on again to fill the second sealing ring 7 with air, causing the second sealing ring 7 to expand and increase the fit with the inner wall of the valve housing 1, thereby increasing the overall sealing effect.

[0031] Example 3: Please refer to Figures 6-7 In order to achieve the purpose of detecting gas leakage, this embodiment provides the following technical solution, which specifically discloses: connecting rings 10 are rotatably installed on the left and right ends of the valve housing 1, and a mounting bracket 11 with a "7" shaped structure is fixedly installed on the outside of the connecting rings 10. A gas sensor 12 is fixedly installed on the upper end of the mounting bracket 11. A friction roller 13 is provided on the outside of the connecting rings 10 to rub against it, and the friction roller 13 is driven by a drive motor 14 fixedly installed inside the mounting base 4.

[0032] The drive motor 14 inside the mounting base 4 is turned on periodically, and the drive motor 14 drives the friction roller 13 to rotate. At this time, the friction roller 13 drives the connecting ring 10 to rotate using its surface friction, thereby causing the connecting ring 10 to drive the external mounting bracket 11 and gas sensor 12 to rotate. The circumferentially rotating gas sensor 12 is used to detect the gas at the connection position between the valve housing 1 and the gas pipeline 3 from all directions, thereby achieving the purpose of detecting leaks.

[0033] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas shut-off valve for fire protection engineering, comprising a valve housing (1) with a cylindrical structure, wherein the left and right ends of the valve housing (1) are fixedly installed to a gas transmission pipeline (3) by means of mating flanges (2), characterized in that, Also includes: The first sealing ring (201) is fixedly installed on the outer surface of the docking flange (2); A mounting base (4) is fixedly installed at the middle position of the upper surface of the valve housing (1), and a valve core plate (5) located inside the valve housing (1) is rotatably installed at the lower end of the mounting base (4), and a rotary cylinder (6) for driving the valve core plate (5) to move is fixedly installed above the mounting base (4). The valve core plate (5) is equipped with a second sealing ring (7) on its outer surface, and two second sealing rings (7) are symmetrically arranged. The valve housing (1) is fixedly equipped with an air supply mechanism for inflating the second sealing ring (7).

2. The gas shut-off valve for fire protection engineering according to claim 1, characterized in that: The gas supply mechanism includes a small air pump (8) fixedly installed in the middle of the lower surface of the valve housing (1), and a connecting pipe (9) is fixedly installed at the upper end interface of the small air pump (8).

3. A gas shut-off valve for fire protection engineering according to claim 2, characterized in that: The valve core plate (5) is set as a hollow structure, and the upper end of the connecting pipe (9) penetrates into the interior of the valve core plate (5), and the connecting pipe (9) is rotatably connected to the valve core plate (5).

4. A gas shut-off valve for fire protection engineering according to claim 3, characterized in that: The valve core plate (5) has equally spaced connection holes (501) on its side, and the second sealing ring (7) is made of hollow elastic rubber.

5. A gas shut-off valve for fire protection engineering according to claim 4, characterized in that: The inner side of the second sealing ring (7) is fixedly installed with a connecting air nozzle (701) communicating with it, and the connecting air nozzle (701) and the connecting hole (501) are engaged with each other.

6. A gas shut-off valve for fire protection engineering according to claim 1, characterized in that: The valve housing (1) has a connecting ring (10) rotatably mounted on both the left and right ends, and a mounting bracket (11) with a "7" shaped structure is fixedly mounted on the outside of the connecting ring (10), and a gas sensor (12) is fixedly mounted on the upper end of the mounting bracket (11).

7. A gas shut-off valve for fire protection engineering according to claim 6, characterized in that: The connecting ring (10) is provided with a friction roller (13) that rubs against it, and the friction roller (13) is driven by a drive motor (14) that is fixedly installed inside the mounting base (4).

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