Pipeline air tightness detection device

Abstract

The utility model discloses a pipeline air tightness detection device comprising a first semicircular cylinder, the upper surface of the first semicircular cylinder is combined and connected with a second semicircular cylinder, two ends of the first semicircular cylinder and two ends of the second semicircular cylinder are provided with semicircular connecting holes, and sealing rings are fixedly attached to the inner sides of the semicircular connecting holes. The two sides of the outer surface of the first semicircular cylinder and the two sides of the outer surface of the second semicircular cylinder are fixedly connected with combined plates, the inner sides of the combined plates are fixedly connected with sealing strips, the interiors of the combined plates are connected with combined bolts in a combined mode through through holes, and the combined bolts are connected to the two side surfaces of the combined plates in a pressed mode. A pressure gauge is fixedly installed on the upper surface of the second semicircular cylinder, a rotating head is rotatably installed at the lower end of the interior of the first semicircular cylinder, the lower end of the rotating head is fixedly connected with an air inlet pipe, and a valve is fixedly installed at one end of the air inlet pipe. The adaptability is high.

Description

Technical Field

[0001] This utility model relates to the field of pipeline inspection, and more specifically, to a pipeline airtightness testing device. Background Technology

[0002] Natural gas pipelines are pipelines that transport natural gas from extraction sites or processing plants to urban gas distribution centers or industrial users. To ensure the airtightness of gas pipelines, their airtightness needs to be tested regularly, which requires the use of natural gas pipeline airtightness testing devices.

[0003] The utility model patent with authorization announcement number CN 213516210 U discloses a natural gas pipeline airtightness testing device, relating to the field of pipeline testing technology. It includes an arc-shaped plate and a carrying case. Two arc-shaped plates are included, each with a handle fixedly connected to one side. The two handles are rotatably connected at their ends near the arc-shaped plates. First sealing rings are fixedly connected to adjacent sides of both arc-shaped plates, and arc-shaped sealing rings are fixedly connected to both ends of both arc-shaped plates. A through hole is formed in the middle of one arc-shaped plate, and a gas pipeline connector is fixedly connected to the outer side of the through hole. A rotating block is rotatably connected to the end of one handle away from the arc-shaped plate. A connecting rod is fixedly connected to one side of the rotating block, and a fixing block is fixedly connected to the end of the connecting rod away from the rotating block. This utility model solves the problems of poor testing effect and the influence of limited space on readings in existing natural gas pipeline airtightness testing devices.

[0004] In the above-disclosed structure, the detection structure is formed by combining two semi-cylinders. However, the lack of a side panel for assembly makes it easy for gaps to form at the assembly position, resulting in leakage and poor stability. Furthermore, the lack of a pressure gauge and air inlet pipe for assembly makes it difficult to conduct detection after stable air intake. During assembly, it is impossible to assist in positioning and locking, resulting in poor adaptability and requiring improvement. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a pipeline airtightness testing device. This device uses a first and second semi-cylinder with semi-circular connecting holes and sealing rings. Combined with connecting bolts on both sides of the combined plates, it can be snapped onto the pipeline surface for assembly and positioning, thus forming a sealed space. A pressure gauge and an air inlet pipe are installed, allowing for pressure testing after gas is introduced. Airtightness is determined by changes in the pressure gauge readings. This device facilitates assembly and positioning, provides convenient and stable testing, and has high adaptability.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A pipeline airtightness testing device includes a first semi-cylinder, a second semi-cylinder connected to the upper surface of the first semi-cylinder, semi-circular connecting holes at both ends of the first and second semi-cylinders, sealing rings fixedly fitted to the inner side of the semi-circular connecting holes, combined plates fixedly connected to both sides of the outer surfaces of the first and second semi-cylinders, sealing strips fixedly connected to the inner side of the combined plates, combined bolts connected to the inside of the combined plates through through holes, the combined bolts being pressed and connected to the two sides of the combined plates, a pressure gauge fixedly installed on the upper surface of the second semi-cylinder, a rotating head rotatably installed at the lower end of the inside of the first semi-cylinder, an air inlet pipe fixedly connected to the lower end of the rotating head, and a valve fixedly installed at one end of the air inlet pipe.

[0008] Furthermore, the combined bolts are connected to the outer surface of the combined plate at equal intervals and are symmetrically distributed on both sides of the first and second semi-cylinders.

[0009] Furthermore, the air intake pipe is rotatably connected to the lower surface of the first semi-cylinder and is located below the combined plate.

[0010] Furthermore, the sealing strip is aligned with the inner surface of the combined plate and has the same length as the first semi-cylinder. By using symmetrically distributed combination bolts on both sides, it is aligned and sealed with the internal sealing strip. After locking and fixing, the combination is positioned, which is conducive to sealing and protection, avoids leakage, and improves detection stability.

[0011] Furthermore, a slot is provided in the middle of the outer surface of the combined plate, and an elastic clamping rod is snapped into the side of the combined plate.

[0012] Furthermore, the elastic clamping rod is provided with locking connectors at both ends, which are engaged with the inside of the locking groove.

[0013] Furthermore, a stop block is fixedly connected to the middle position of the elastic clamping rod. The stop block is attached to the outer surface of the combination plate. The combination plate is provided with a slot, which, together with the elastic clamping rod connecting clip on the side, can be elastically clamped and positioned to assist in clamping and positioning, preventing loosening and misalignment. Then it can be locked and fixed, which is convenient for installation and use, and is stable and efficient.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This scheme sets semi-circular connecting holes and sealing rings in the first and second semi-circular cylinders, and connects them with the combination plates on both sides and the combination bolts. It can be snapped onto the surface of the pipe for combination positioning, thereby forming a sealed space. Pressure gauges and air inlet pipes are installed, and pressure is maintained after gas is introduced for testing. The air tightness is judged by the change in pressure gauge reading, which is conducive to combination positioning, convenient and stable testing, and highly adaptable.

[0016] (2) By combining bolts symmetrically distributed on both sides and using the internal sealing strip for alignment and sealing, the bolts can be locked and fixed for positioning, which is conducive to sealing and protection, avoiding leakage and improving detection stability.

[0017] (3) The combination plate is set with a slot, and the elastic clamping rod on the side is connected to the clamping head. It can be elastically clamped and positioned to avoid loosening and misalignment. Then it can be locked and fixed, which is convenient for installation and use, and is stable and efficient. Attached Figure Description

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

[0019] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0020] Figure 3 This is a partial cross-sectional view of the combined plate connection of this utility model;

[0021] Figure 4 This is a partial structural diagram of the intake pipe connection of this utility model;

[0022] Figure 5 This is a partial structural diagram of the elastic clamping rod connection of this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 1 First semi-cylinder, 11 Second semi-cylinder, 12 Semi-circular connecting hole, 13 Sealing ring, 14 Combination plate, 15 Sealing strip, 16 Combination bolt, 17 Pressure gauge, 2 Rotating head, 21 Air inlet pipe, 22 Valve, 23 Slot, 24 Elastic clamping rod, 25 Clip connector, 26 Stop block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 , Figure 3 and Figure 4A pipeline airtightness testing device includes a first semi-cylinder 1, with a second semi-cylinder 11 connected to the upper surface of the first semi-cylinder 1. Both ends of the first and second semi-cylinders 1 and 11 are provided with semi-circular connecting holes 12. A sealing ring 13 is fixedly fitted to the inner side of the semi-circular connecting hole 12, which can be fitted onto the upper and lower surfaces of the pipeline being tested. The semi-circular connecting hole 12 can avoid the pipeline position and press the sealing ring 13 against the pipeline surface to ensure sealing stability. This facilitates assembly and can form a sealed space on the outer surface of the pipeline, allowing compressed gas to be introduced for testing, resulting in high efficiency and stability. A combination plate 14 is fixedly connected to both sides of the outer surface of the first and second semi-cylinders 1 and 11. A sealing strip 15 is fixedly connected to the inner side of the combination plate 14. Combination bolts 16 are connected to the inside of the combination plate 14 through through holes, and the combination bolts 16 are pressed tightly to the two sides of the combination plate 14. A pressure gauge 17 is fixedly installed on the upper surface of the second semi-cylinder 11. The end of the pressure gauge 17 is inserted into the interior of the second semi-cylinder 11 to facilitate contact with compressed air for pressure detection. A rotating head 2 is rotatably installed at the lower end of the interior of the first semi-cylinder 1. An air inlet pipe 21 is fixedly connected to the lower end of the rotating head 2. A valve 22 is fixedly installed at one end of the air inlet pipe 21. The rotating head 2 connects to the air inlet pipe 21, allowing for rotational adjustment of the orientation to avoid interference and facilitate connection to an air pump to introduce compressed air. This creates a detection space between the outer surface of the pipe and the first and second semi-cylinders 11. After the compressed air is stored inside, the valve 22 is closed for a closed detection. If there is no leakage, the pressure can be maintained. If there is a leakage on the pipe surface, gas will enter the pipe and reduce the pressure, which can be directly displayed from the reading of the pressure gauge 17. This facilitates combined use and provides stability.

[0027] Please see Figure 1 and Figure 2 The combination bolts 16 are evenly spaced and connected to the outer surface of the combination plate 14, and are symmetrically distributed on both sides of the first semi-cylinder 1 and the second semi-cylinder 11. The air intake pipe 21 is rotatably connected to the lower surface of the first semi-cylinder 1 and is located below the combination plate 14. The sealing strip 15 is aligned with the inner surface of the combination plate 14 and has the same length as the first semi-cylinder 1. By using the combination bolts symmetrically distributed on both sides and the internal sealing strip for alignment and sealing, the combination can be locked and fixed, which is conducive to sealing and protection, avoids leakage, and improves detection stability.

[0028] Please see Figure 1 , Figure 2 and Figure 5A slot 23 is provided in the middle of the outer surface of the combined plate 14. An elastic clamping rod 24 is clamped to the side of the combined plate 14. The two ends of the elastic clamping rod 24 are provided with clamping connectors 25, which are clamped into the inside of the slot 23. A stop block 26 is fixedly connected to the middle of the elastic clamping rod 24. The stop block 26 fits against the outer surface of the combined plate 14. By setting the slot in the combined plate and connecting the clamping connectors to the elastic clamping rods on the side, the plate can be elastically clamped and positioned to assist in clamping and positioning, preventing loosening and misalignment. Then it can be locked and fixed, which is convenient for installation and use, stable and efficient. After sliding the first semi-cylinder 1 and the second semi-cylinder 11 together to the upper and lower surfaces of the pipe, the clamping connectors 25 can be clamped into the inside of the slot 23 to clamp the two layers of the combined plate 14 with the elastic clamping rod 24 for positioning, preventing loosening and falling. It can assist in positioning. Then the combined bolts 16 are installed for locking and fixing, which is convenient for installation and use, stable and efficient.

[0029] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A pipe airtightness testing device, comprising a first semi-cylinder (1), wherein a second semi-cylinder (11) is connected to the upper surface of the first semi-cylinder (1), characterized in that: Both ends of the first semi-cylinder (1) and the second semi-cylinder (11) are provided with semi-circular connecting holes (12). A sealing ring (13) is fixedly attached to the inner side of the semi-circular connecting hole (12). A combination plate (14) is fixedly connected to both sides of the outer surface of the first semi-cylinder (1) and the second semi-cylinder (11). A sealing strip (15) is fixedly connected to the inner side of the combination plate (14). A combination bolt (16) is connected to the inside of the combination plate (14) through a through hole. The combination bolt (16) is pressed and connected to both sides of the combination plate (14). A pressure gauge (17) is fixedly installed on the upper surface of the second semi-cylinder (11). A rotating head (2) is rotatably installed at the lower end of the inside of the first semi-cylinder (1). An air inlet pipe (21) is fixedly connected to the lower end of the rotating head (2). A valve (22) is fixedly installed at one end of the air inlet pipe (21).

2. The pipeline airtightness testing device according to claim 1, characterized in that: The combined bolts (16) are connected at equal intervals to the outer surface of the combined plate (14) and are symmetrically distributed on both sides of the first semi-cylinder (1) and the second semi-cylinder (11).

3. The pipeline airtightness testing device according to claim 1, characterized in that: The air intake pipe (21) is rotatably connected to the lower surface of the first semi-cylinder (1) and is located below the combined plate (14).

4. The pipeline airtightness testing device according to claim 1, characterized in that: The sealing strip (15) is aligned with the inner surface of the combination plate (14) and has the same length as the first semi-cylinder (1).

5. The pipeline airtightness testing device according to claim 1, characterized in that: The outer surface of the combined plate (14) is provided with a slot (23) in the middle, and the side of the combined plate (14) is fitted with an elastic clamping rod (24).

6. The pipeline airtightness testing device according to claim 5, characterized in that: The elastic clamping rod (24) has snap-fit ​​connectors (25) at both ends, and the snap-fit ​​connectors (25) snap into the inside of the slot (23).

7. A pipeline airtightness testing device according to claim 5, characterized in that: A stop (26) is fixedly connected to the middle position of the elastic clamping rod (24), and the stop (26) is attached to the outer surface of the combined plate (14).

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