Metering detection device for gas leakage volume detection

Abstract

The utility model discloses a metering detection device for gas leakage volume detection, which comprises two sealing cylinders, flanges are integrally formed on the opposite sides of the two sealing cylinders, first sealing rings are fixed on the opposite sides of the two flanges, the two flanges are fixedly connected through bolts and nuts, and the first sealing rings are fixed on the first sealing rings. A fixed threaded cylinder is fixed to the outer side wall of the front sealing cylinder, a through hole is formed in the outer side wall of the front sealing cylinder, and a volume detection mechanism is in threaded connection with the interior of the fixed threaded cylinder and comprises an air cylinder and a threaded connection cylinder. According to the metering detection device for gas leakage volume detection, the gas detection mechanism is arranged, two sealing cylinders are arranged on the outer side wall of a pipeline in a sleeving mode, if the pipeline leaks gas, the gas enters the sealing cylinders and then enters a gas cylinder through a threaded connection cylinder, then a piston moving plate is pushed to move, and the scale corresponding to the piston moving plate is observed; therefore, the volume of gas leakage can be known.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a metering detection device for detecting the volume of gas leakage. Background Technique

[0002] A pipeline is a device formed by connecting pipes, pipe fittings, valves, etc. for transporting gases, liquids or fluids with solid particles. Usually, after the fluid is pressurized by a blower, compressor, pump, boiler, etc., it flows from the high-pressure part of the pipeline to the low-pressure part, or it can also be transported by the pressure or gravity of the fluid itself. Pipelines are widely used, mainly in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial installations. When transporting over a long distance, multiple pipes need to be connected, and the connection joints of the pipes are commonly connected by flanges. After long-term use of the pipeline, gas leakage is likely to occur at the connection joints of the pipeline, especially at the flange joints.

[0003] After retrieval, the existing patent (Publication No.: CN111288304B) discloses a metering detection device for gas leakage, including an upper seal and a lower seal. The shape and size of the upper seal are the same as those of the lower seal, and the shapes of the upper seal and the lower seal are semi-cylindrical. Semi-circular through holes with the same diameter are opened in the middle of both sides of the upper seal and the lower seal. Semi-circular pipes are fixedly installed on both sides of the inner cavities of the upper seal and the lower seal and are located outside the semi-circular through holes. For this metering detection device for gas leakage, through the structural design of the upper seal, lower seal, semi-circular pipe, airbag, U-shaped pipe and air extraction mechanism, the flange connection of the pipeline to be detected is sealed by the upper seal and the lower seal. By detecting the displacement difference of the liquid in the U-shaped pipe in two periods, the slight gas leakage at the flange can be detected, so that maintenance personnel can repair it in time to avoid gas waste. Moreover, it is convenient for maintenance personnel to measure the gas leakage volume.

[0004] It uses an airbag to fit the pipeline for sealing, which is convenient for detecting the leakage of pipeline flanges with different diameters, reduces the usage requirements of the detection device, and is convenient for maintenance personnel to use. However, it needs to be inflated, which is rather troublesome. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a metering detection device for detecting the volume of gas leakage, which solves the problems raised in the above background technique.

[0006] To achieve the above object, the utility model is realized by the following technical solutions: A metering and detecting device for detecting the volume of gas leakage, including two sealed cylinders. On the opposite sides of the two sealed cylinders, flanges are integrally formed. On the opposite sides of the two flanges, first sealing rings are fixed. The two flanges are fixedly connected by bolts and nuts. On the outer wall of the front sealed cylinder, a fixed threaded cylinder is fixed. On the outer wall of the front sealed cylinder, a perforation is provided. Inside the fixed threaded cylinder, a volume detecting mechanism is screwed. The volume detecting mechanism includes an air cylinder and a threaded connection cylinder. Inside the sealed cylinder, a sealing mechanism is provided. The sealing mechanism includes a moving ring, a pressing ring, a second sealing ring and a plurality of connecting rods.

[0007] Preferably, the outer wall of the threaded connection cylinder is screwed with the inner wall of the fixed threaded cylinder. On the top of the fixed threaded cylinder, a third sealing ring is fixed. The top of the threaded connection cylinder is fixedly connected with the bottom of the air cylinder. On the top of the air cylinder, a first hexagonal block is fixed.

[0008] Preferably, on the outer wall of the air cylinder, a viewing port is provided. Inside the viewing port, toughened glass is fixed. On the outer wall of the air cylinder, a scale is provided. Inside the air cylinder, a piston moving plate is slidably connected.

[0009] Preferably, on the inner wall of the sealed cylinder, a fixed frame is fixed. The inner walls of the two fixed frames are fixedly connected with the outer wall of the second sealing ring. At one end of the second sealing ring away from the fixed frame, an extrusion groove is provided. The pressing ring is located inside the extrusion groove.

[0010] Preferably, on the opposite sides of the two pressing rings, they are respectively fixedly connected with one ends of the plurality of connecting rods close to the second sealing ring. One ends of the plurality of connecting rods away from the pressing ring all pass through the sealed cylinder and are respectively fixedly connected with the opposite sides of the two moving rings.

[0011] Preferably, inside the moving ring, a screw rod is screwed. One ends of the two screw rods away from the moving ring are respectively rotatably connected with the opposite sides of the two sealed cylinders. One end of the screw rod away from the sealed cylinder is fixed with a second hexagonal block. Beneficial effects

[0012] The utility model provides a metering and detecting device for detecting the volume of gas leakage. Compared with the prior art, the following beneficial effects are achieved:

[0013] 1. For the metering and detecting device for detecting the volume of gas leakage, by setting a gas detecting mechanism, the two sealed cylinders are sleeved on the outer wall of the pipeline. If the pipeline leaks air, the gas enters the inside of the sealed cylinder, then enters the inside of the air cylinder through the threaded connection cylinder, and then pushes the piston moving plate to move. By observing the scale corresponding to the piston moving plate, the volume of gas leakage can be known.

[0014] 2. The metering and detection device for detecting the volume of gas leakage, by setting a sealing mechanism, turning the second hexagonal block with a wrench, the second hexagonal block drives the screw rod to rotate, the rotation of the screw rod makes the moving ring move, the moving ring pushes the connecting rod to move, the connecting rod pushes the pressing ring to move, and the pressing ring squeezes the extrusion groove, so that the inner side wall of the second sealing ring and the outer side wall of the pipeline are closely attached, increasing the sealing performance and reducing the gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] Figure 2 It is a schematic structural diagram of the sealing mechanism in the present utility model.

[0017] Figure 3 It is a schematic cross-sectional structural diagram of the pressing ring and the second sealing ring in the present utility model.

[0018] Figure 4 It is a schematic cross-sectional structural diagram of the sealing cylinder in the present utility model.

[0019] Figure 5 It is a schematic cross-sectional structural diagram of the air cylinder in the present utility model.

[0020] In the figure: 1, toughened glass; 2, scale; 3, third sealing ring; 4, sealing mechanism; 5, bolt; 6, viewing port; 7, sealing cylinder; 8, flange; 9, fixed threaded cylinder; 10, nut; 11, first sealing ring; 12, volume detection mechanism; 13, first hexagonal block; 14, second hexagonal block; 15, screw rod; 16, piston moving plate; 17, connecting rod; 18, moving ring; 19, second sealing ring; 20, pressing ring; 21, air cylinder; 22, pressing groove; 23, fixed frame; 24, threaded connection cylinder; 25, perforation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-5, the present utility model provides a technical solution: a metering and detection device for detecting the volume of gas leakage, including two sealing cylinders 7. Flanges 8 are integrally formed on the opposite sides of the two sealing cylinders 7. First sealing rings 11 are fixed on the opposite sides of the two flanges 8. The two flanges 8 are fixedly connected by bolts 5 and nuts 10. A fixed threaded cylinder 9 is fixed on the outer wall of the front sealing cylinder 7. A perforation 25 is provided on the outer wall of the front sealing cylinder 7. A volume detection mechanism 12 is screwed inside the fixed threaded cylinder 9. The volume detection mechanism 12 includes a gas cylinder 21 and a threaded connection cylinder 24. A sealing mechanism 4 is provided inside the sealing cylinder 7. The sealing mechanism 4 includes a moving ring 18, a pressing ring 20, a second sealing ring 19 and a plurality of connecting rods 17. The outer wall of the threaded connection cylinder 24 is screwed with the inner wall of the fixed threaded cylinder 9. A third sealing ring 3 is fixed on the top of the fixed threaded cylinder 9. The top of the threaded connection cylinder 24 is fixedly connected with the bottom of the gas cylinder 21. A first hexagonal block 13 is fixed on the top of the gas cylinder 21. A viewing port 6 is provided on the outer wall of the gas cylinder 21. A tempered glass 1 is fixed inside the viewing port 6. A scale 2 is provided on the outer wall of the gas cylinder 21. A piston moving plate 16 is slidably connected inside the gas cylinder 21. The two sealing cylinders 7 are sleeved on the outer wall of the pipeline. If the pipeline leaks air, the gas enters the inside of the sealing cylinder 7, then enters the inside of the gas cylinder 21 through the threaded connection cylinder 24, and then pushes the piston moving plate 16 to move. By observing the scale corresponding to the piston moving plate 16, the volume of gas leakage can be known.

[0023] Furthermore, a fixed frame 23 is fixed on the inner wall of the sealing cylinder 7. The inner walls of the two fixed frames 23 are fixedly connected with the outer wall of the second sealing ring 19. An extrusion groove 22 is provided at one end of the second sealing ring 19 away from the fixed frame 23. The pressing ring 20 is located inside the extrusion groove 22. The opposite sides of the two pressing rings 20 are respectively fixedly connected with one ends of the plurality of connecting rods 17 close to the second sealing ring 19. One ends of the plurality of connecting rods 17 away from the pressing ring 20 respectively pass through the sealing cylinder 7 and are fixedly connected with the opposite sides of the two moving rings 18. A screw rod 15 is screwed inside the moving ring 18. One ends of the two screw rods 15 away from the moving ring 18 are respectively rotatably connected with the opposite sides of the two sealing cylinders 7. A second hexagonal block 14 is fixed at one end of the screw rod 15 away from the sealing cylinder 7. Using a wrench to rotate the second hexagonal block 14, the second hexagonal block 14 drives the screw rod 15 to rotate. The rotation of the screw rod 15 causes the moving ring 18 to move. The moving ring 18 pushes the connecting rod 17 to move. The connecting rod 17 pushes the pressing ring 20 to move. The pressing ring 20 squeezes the extrusion groove 22, so that the inner wall of the second sealing ring 19 is closely attached to the outer wall of the pipeline, increasing the sealing performance and reducing gas leakage.

[0024] During operation, two sealing cylinders 7 are sleeved on the outer sidewall of the pipeline. If the pipeline leaks air, the air enters the interior of the sealing cylinder 7, then enters the interior of the air cylinder 21 through the threaded connection cylinder 24, and then pushes the piston moving plate 16 to move. By observing the scale corresponding to the piston moving plate 16, the volume of air leakage can be known. Use a wrench to rotate the second hexagonal block 14, and the second hexagonal block 14 drives the screw rod 15 to rotate. The rotation of the screw rod 15 causes the moving ring 18 to move, the moving ring 18 pushes the connecting rod 17 to move, and the connecting rod 17 pushes the pressing ring 20 to move. The pressing ring 20 squeezes the squeezing groove 22, so that the inner sidewall of the second sealing ring 19 is closely attached to the outer sidewall of the pipeline, increasing the sealing performance and reducing air leakage.

[0025] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0026] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising said element.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metering and testing device for detecting the volume of gas leakage, comprising two sealed cylinders (7), characterized in that: Flanges (8) are integrally formed on the opposite sides of the two sealing cylinders (7). First sealing rings (11) are fixed on the opposite sides of the two flanges (8). The two flanges (8) are fixedly connected by bolts (5) and nuts (10). A fixed threaded cylinder (9) is fixed on the outer side wall of the front sealing cylinder (7). A perforation (25) is formed on the outer side wall of the front sealing cylinder (7). A volume detection mechanism (12) is screwed inside the fixed threaded cylinder (9). The volume detection mechanism (12) includes an air cylinder (21) and a threaded connection cylinder (24). A sealing mechanism (4) is arranged inside the sealing cylinder (7). The sealing mechanism (4) includes a moving ring (18), a pressing ring (20), a second sealing ring (19) and a plurality of connecting rods (17).

2. The metering and detection device for detecting the volume of gas leakage according to claim 1, characterized in that: The outer side wall of the threaded connection cylinder (24) is screwed with the inner side wall of the fixed threaded cylinder (9). A third sealing ring (3) is fixed on the top of the fixed threaded cylinder (9). The top of the threaded connection cylinder (24) is fixedly connected with the bottom of the air cylinder (21). A first hexagonal block (13) is fixed on the top of the air cylinder (21).

3. The metering and detection device for detecting the gas leakage volume according to claim 2, characterized in that: A viewing port (6) is formed on the outer side wall of the air cylinder (21). Tempered glass (1) is fixed inside the viewing port (6). A scale (2) is formed on the outer side wall of the air cylinder (21). A piston moving plate (16) is slidably connected inside the air cylinder (21).

4. A metering and detection device for detecting the volume of gas leakage according to claim 3, characterized in that: Fixed frames (23) are fixed on the inner side wall of the sealing cylinder (7). The inner side walls of the two fixed frames (23) are fixedly connected with the outer side wall of the second sealing ring (19). An extrusion groove (22) is formed at one end of the second sealing ring (19) away from the fixed frame (23). The pressing ring (20) is located inside the extrusion groove (22).

5. The metering and detection device for detecting the volume of gas leakage according to claim 4, characterized in that: The opposite sides of the two pressing rings (20) are respectively fixedly connected with one ends of the plurality of connecting rods (17) close to the second sealing ring (19). The other ends of the plurality of connecting rods (17) away from the pressing ring (20) all pass through the sealing cylinder (7) and are respectively fixedly connected with the opposite sides of the two moving rings (18).

6. The metering and detection device for detecting the volume of gas leakage according to claim 5, wherein: A screw rod (15) is screwed inside the moving ring (18). One ends of the two screw rods (15) away from the moving ring (18) are respectively rotatably connected with the opposite sides of the two sealing cylinders (7). A second hexagonal block (14) is fixed at one end of the screw rod (15) away from the sealing cylinder (7).

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