Gas leakproof device

Abstract

The utility model provides a gas leakage prevention device, and belongs to the technical field of gas drainers. The technical problem that the sealing performance of the gas leakage prevention device needs to be improved is solved. According to the technical scheme, the gas leakage prevention device comprises a drainage barrel, a sealing plate is arranged in the drainage barrel, a drainage opening is formed in the sealing plate, a connecting rod is rotationally arranged on the lower surface of the sealing plate, the middle of the connecting rod is rotationally connected, and the two sections of the connecting rod are connected with a floating barrel and a sealing ring respectively; the upper portion of the sealing ring is connected with a marker post, the upper end of the marker post extends out of the upper end of the drainage barrel, the marker post is sleeved with a sealing cover, the sealing cover can move up and down along the marker post, the sealing cover is conical, an opening faces downwards, and the diameter of the opening in the upper end of the sealing cover is matched with the diameter of the marker post. The diameter of the lower end opening of the sealing cover is larger than that of the water outlet, and a buoyancy ring is arranged in the sealing cover. The gas leakage prevention device has the advantage that the sealing performance of the gas leakage prevention device is further improved.

Description

Technical Field

[0001] This utility model relates to the field of gas drainer technology, and in particular to a gas leak prevention device. Background Technology

[0002] A gas leak prevention device is a safety device that prevents gas leaks. It includes a drain tank, which is connected to and communicates with the inlet tank of a gas drainer. A sealing plate is connected inside the drain tank, and a drain outlet is opened on the sealing plate. A connecting rod is rotatably connected to the lower surface of the sealing plate. A float and a sealing ring are respectively connected to the two ends of the connecting rod. A marker is connected to the upper part of the sealing ring, and the upper end of the marker extends from the top of the drain tank.

[0003] Under normal circumstances, the drainer's inner cavity is filled with water, and the drain tank's inner cavity is also filled with water. The float in the leak-proof device floats up, and the connecting rod rotates, causing the sealing ring to move down, opening the drain outlet, and the drainer overflows normally. When the gas pipeline pressure is abnormal or the gas drainer becomes dehydrated, the float sinks due to its own weight, and the connecting rod rotates, causing the sealing ring to move down and block the drain hole. After the gas pipeline pressure returns to normal or the drainer is refilled with water, the float in the leak-proof device floats up again, the sealing surface opens, and the drainer resumes normal overflow.

[0004] When dehydration occurs in the gas drainer, the water level in the drain tank gradually drops. After the water level drops below the drain outlet, it moves closer to the float. At this point, the drain outlet is open. However, as the water level begins to drop from the float, the float also begins to move downwards, and the sealing ring gradually moves upwards to block the drain outlet. Therefore, during the process from when the water level drops below the drain outlet until the sealing ring blocks the drain outlet, the drain outlet is open, which can easily lead to gas leakage. Thus, the sealing performance of the gas leak prevention device needs to be further improved. Summary of the Invention

[0005] The purpose of this invention is to provide a gas leak prevention device that can further improve sealing performance.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A gas leak prevention device includes a drain tank, a sealing plate inside the drain tank with a drain outlet on the sealing plate, a connecting rod rotatably mounted on the lower surface of the sealing plate, the middle of the connecting rod being rotatably connected, and a float and a sealing ring respectively connected to the two ends of the connecting rod; a marker rod is connected to the upper part of the sealing ring, the upper end of the marker rod extending from the upper end of the drain tank, a sealing cover fitted on the marker rod, the sealing cover being movable up and down along the marker rod, the sealing cover being conical with its opening facing downwards, the diameter of the upper opening of the sealing cover being adapted to the diameter of the marker rod, the diameter of the lower opening of the sealing cover being larger than the diameter of the drain outlet, and a buoyancy ring disposed inside the sealing cover. The lateral movement distance of the marker rod is less than the distance between the edge of the sealing cover and the edge of the drain outlet, and the buoyancy ring is a closed, inflatable rubber buoyancy ring.

[0008] Furthermore, the sealing cover includes a left sealing surface and a right sealing surface, which are rotatably connected on the same side. The rotatable connection can be a hinge connection or a pin connection. The other side of the left sealing surface and the right sealing surface are detachably connected, and an opening is provided on the buoyancy ring.

[0009] Furthermore, the buoyancy ring includes two buoyancy rods, which are arc-shaped, and the two buoyancy rods are respectively connected to the inner walls of the left sealing surface and the right sealing surface.

[0010] Furthermore, magnetic elements are embedded in the end walls of both the left and right sealing surfaces on the side away from the rotating connection point, and the two magnetic elements are attracted to each other.

[0011] Furthermore, a connecting hole is formed on the side wall of the right sealing surface away from the rotating connection point. The connecting hole extends through to the end wall of the right sealing surface. A bolt is inserted into the connecting hole. The bolt passes through the connecting hole and is inserted into the end of the left sealing surface, where it is threadedly connected to the left sealing surface.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. When the drain tank is full of water, the buoyancy ring causes the sealing cover to float in the water. When dehydration occurs, as the water level drops, the buoyancy ring causes the sealing cover to drop. When the water level drops below the drain outlet, the sealing cover covers the drain outlet. Before the sealing ring seals the drain outlet, it provides a preliminary seal to prevent gas leakage before the sealing ring seals the drain outlet, thereby further improving the sealing performance of the gas leak prevention device.

[0014] 2. The sealing cover is designed to be spliced ​​together by a rotating connection between the left and right sealing surfaces, so that the installation and removal of the sealing cover are not affected by the benchmark, making it easy to install and remove the sealing cover. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] Figure 1 This is a cross-sectional structural schematic diagram of a gas leak prevention device in Embodiment 1 of this utility model.

[0017] Figure 2 This is a schematic diagram illustrating the connection relationship between the left and right sealing surfaces in Embodiment 1 of this utility model.

[0018] Figure 3 for Figure 2 The bottom view and partial sectional view of the central sealing cover are used to show the positions of the two magnetic components in Embodiment 1.

[0019] Figure 4 for Figure 2 The bottom view and partial sectional view of the central sealing cover are used to show the positions of the bolts and connecting holes in Embodiment 2.

[0020] The attached diagram is labeled as follows: 1. Drainage bucket; 11. Sealing plate; 12. Drain outlet; 13. Connecting rod; 14. Float; 15. Sealing ring; 16. Marker; 2. Sealing cover; 21. Left sealing surface; 22. Right sealing surface; 23. Magnetic component; 24. Connecting hole; 241. Stepped groove; 25. Bolt; 3. Buoyancy ring; 31. Buoyancy rod. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.

[0022] Example 1

[0023] See Figure 1-3 The present invention provides a gas leak prevention device, comprising a drain bucket 1, which is connected and communicates with the inlet bucket of a gas drainer during use. A drain pipe is connected and communicates with the upper side wall of the drain bucket 1. A sealing plate 11 is fixedly connected to the inner wall of the drain bucket 1. The edge of the sealing plate 11 is attached to the inner wall of the drain bucket 1 and connected by welding. A drain outlet 12 is provided on the sealing plate 11. A connecting rod is provided on the lower surface of the sealing plate 11. A connecting rod 13 is rotatably connected to the connecting rod. The rotatable connection point of the connecting rod 13 is located in the middle. A float 14 and a sealing ring 15 are connected to both ends of the connecting rod 13. The float 14 is rotatably connected to the connecting rod 13. The sealing ring 15 is fixedly connected to the connecting rod 13. The sealing ring 15 is made of elastic rubber. Pressure plates are connected to both sides of the sealing ring 15. The two pressure plates are connected by screws, and the screws pass through the sealing ring 15.

[0024] Preferably, a marker 16 is connected to the upper surface of the sealing ring 15. The marker 16 is rotatably connected to a pre-set mounting bracket on the sealing ring 15 via a pin. A top cap is fixedly connected to the upper end of the drain bucket 1. The upper end of the marker 16 passes through the top cap and extends out of the drain bucket 1. A sealing cover 2 is fitted on the marker 16. The sealing cover 2 can move up and down along the marker 16. The sealing cover 2 is conical and the opening faces downward. The diameter of the lower opening of the sealing cover 2 is larger than the diameter of the drain outlet 12. A buoyancy ring 3 is provided inside the sealing cover 2.

[0025] Preferably, the sealing cover 2 includes a left sealing surface 21 and a right sealing surface 22, which are rotatably connected on the same side. The connection method can be a hinge connection or a pin connection. Magnetic elements 23, which are neodymium magnets, are embedded in the end wall on the side away from the rotatable connection point. The two magnetic elements 23 attract each other. When installing the sealing cover 2, the left sealing surface 21 and the right sealing surface 22 are rotated open and placed on the marker 16 from both sides. Then, the left sealing surface 21 and the right sealing surface 22 are rotated closed, and the magnetic elements 23 on the left sealing surface 21 and the right sealing surface 22 attract each other, thus realizing the installation of the sealing cover 2.

[0026] Preferably, a buoyancy ring 3 is provided inside the sealing cover 2. The buoyancy ring 3 is a closed inflatable buoyancy ring made of rubber. The buoyancy ring 3 includes two buoyancy rods 31. The buoyancy rods 31 are arc-shaped and the two buoyancy rods 31 are respectively connected to the inner walls of the left sealing surface 21 and the right sealing surface 22.

[0027] When the drain tank 1 is filled with water, the buoyancy ring 3 causes the sealing cover 2 to float in the water. As dehydration occurs, the water level drops, and the buoyancy ring 3 causes the sealing cover 2 to descend. When the water level drops below the drain outlet 12, the sealing cover 2 covers the drain outlet 12, providing a preliminary seal before the sealing ring 15 completely seals it. This prevents gas leakage before the sealing ring 15 completely seals the drain outlet 12, further improving the sealing performance of the gas leak prevention device. When the drain tank 1 is refilled with water, the float 14 rises, causing the sealing ring 15 to open the drain outlet 12 from below. Water flows through the drain outlet 12 and contacts the two buoyancy rods 31. The buoyancy rods 31 float, causing the sealing cover 2 to move upwards, thus opening the drain outlet 12.

[0028] Example 2

[0029] Reference Figure 4The difference from Embodiment 1 is that a connecting hole 24 is opened on the side wall of the right sealing surface 22 away from the rotating connection point. The connecting hole 24 extends through to the end wall of the right sealing surface 22. A bolt 25 is inserted into the connecting hole 24. The bolt 25 passes through the connecting hole 24 and is inserted into the end of the left sealing surface 21, and is threadedly connected to the left sealing surface 21. A stepped groove 241 is opened on the inner wall of the connecting hole 24 for placing the screw head of the bolt 25.

[0030] After the left sealing surface 21 and the right sealing surface 22 are rotated and closed, the bolt 25 is inserted and passes through the connecting hole 24, and is further screwed into the left sealing surface 21 to achieve the connection between the left sealing surface 21 and the right sealing surface 22, thus completing the installation of the sealing cover 2.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas leak prevention device, comprising a drain tank (1), wherein a sealing plate (11) is provided inside the drain tank (1), a drain outlet (12) is provided on the sealing plate (11), a connecting rod (13) is rotatably provided on the lower surface of the sealing plate (11), the middle part of the connecting rod (13) is rotatably connected, and a float (14) and a sealing ring (15) are respectively connected to the two ends of the connecting rod (13); characterized in that, The upper part of the sealing ring (15) is connected to a marker (16), the upper end of the marker (16) extends from the upper end of the drain bucket (1), a sealing cover (2) is fitted on the marker (16), the sealing cover (2) can move up and down along the marker (16), the sealing cover (2) is conical and the opening faces downward, the diameter of the upper opening of the sealing cover (2) is adapted to the diameter of the marker (16), the diameter of the lower opening of the sealing cover (2) is larger than the diameter of the drain outlet (12), and a buoyancy ring (3) is provided inside the sealing cover (2).

2. The gas leak prevention device according to claim 1, characterized in that, The sealing cover (2) includes a left sealing surface (21) and a right sealing surface (22), which are rotatably connected on the same side and detachably connected on the other side. An opening is provided on the buoyancy ring (3).

3. The gas leak prevention device according to claim 2, characterized in that, The buoyancy ring (3) includes two buoyancy rods (31), which are arc-shaped and are respectively connected to the inner walls of the left sealing surface (21) and the right sealing surface (22).

4. The gas leak prevention device according to claim 2, characterized in that, Magnetic elements (23) are embedded in the end walls of the left sealing surface (21) and the right sealing surface (22) on the side away from the rotating connection point, and the two magnetic elements (23) are magnetically attracted to each other.

5. The gas leak prevention device according to claim 2, characterized in that, A connecting hole (24) is provided on the side wall of the right sealing surface (22) away from the rotating connection point. The connecting hole (24) extends through to the end wall of the right sealing surface (22). A bolt (25) is inserted into the connecting hole (24). The bolt (25) passes through the connecting hole (24) and is inserted into the end of the left sealing surface (21) and is threadedly connected to the left sealing surface (21).

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