A natural gas station ball valve inner leakage amount rapid detection device

Abstract

The utility model relates to ball valve detection technical field and disclose a kind of natural gas station ball valve inner leakage amount rapid detection device, the natural gas station ball valve inner leakage amount rapid detection device, including installation frame, ball valve blow-off nozzle, the inside rotation of installation frame is equipped with two-way screw rod, the surface of two-way screw rod is screwed and is equipped with two screw sleeves, the surface of two screw sleeves is all fixedly connected with clamping plate;The side surface of installation frame is rotatably installed with screw rod, and the connecting plate is arranged on the screw rod, the surface of the connecting plate is provided with threaded hole, the connecting plate is screwed and is set in the outside of the screw rod by threaded groove, and the installation pipe is fixedly installed on the connecting plate, and the connecting assembly is provided above the installation pipe;The lower end of the installation pipe extends to the lower of the connecting plate and is connected with hose;The device is fixed stable, convenient to operate, can accurately quantify inner leakage, and greatly improves detection efficiency and security.

Description

Technical Field

[0001] This utility model relates to the field of ball valve detection technology, specifically a rapid detection device for internal leakage of ball valves in natural gas stations. Background Technology

[0002] With the construction and development of long-distance natural gas pipelines, gas transmission stations and line shut-off valves are widely used. As shut-off equipment for trunk lines and stations, valve leakage directly affects the safety of operations such as gas metering, pipeline opening, and hot work. Therefore, it is particularly important to understand the leakage situation of valves.

[0003] Currently, the industry commonly uses the valve cavity venting method or pressure gauge testing method to detect internal leakage in ball valves. However, these methods have significant shortcomings: they require valve cavity pressure holding, making the testing process cumbersome, inefficient, and time-consuming for testing a single valve; they also require frequent replacement of compatible test connectors for different sizes of ball valve drain nozzles, resulting in poor compatibility; furthermore, they can only determine whether there is internal leakage, but cannot directly obtain quantitative data on the amount of internal leakage, making it difficult to meet the accurate requirements of operational safety assessment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a rapid detection device for internal leakage of ball valves in natural gas stations. It solves the problems of the need to perform valve cavity pressure testing, which is cumbersome, inefficient, and time-consuming for testing a single valve. Furthermore, it requires frequent replacement of matching test connectors for ball valve drain nozzles of different sizes, resulting in poor compatibility. Additionally, it can only determine whether there is internal leakage and cannot directly obtain quantitative data on internal leakage, making it difficult to meet the accurate requirements of operational safety assessment.

[0005] This utility model provides the following technical solution: a rapid detection device for internal leakage of ball valve in natural gas station, including a mounting frame and a ball valve drain nozzle. A bidirectional screw is rotatably installed inside the mounting frame. Two threaded sleeves are threaded onto the surface of the bidirectional screw, and clamps are fixedly connected to the surfaces of the two threaded sleeves.

[0006] A lead screw is rotatably mounted on one side of the mounting frame. A connecting plate is provided on the lead screw. A threaded hole is opened on the surface of the connecting plate. The connecting plate is threadedly sleeved on the outside of the lead screw through a threaded groove. An installation tube is fixedly mounted on the connecting plate. A connecting assembly is provided above the installation tube.

[0007] The lower end of the installation pipe extends to the bottom of the connecting plate and is connected to a flexible hose, one end of which is equipped with a digital flow meter.

[0008] Preferred technical solution 1: A sliding rod is fixedly connected inside the mounting frame, and two sliding sleeves are slidably sleeved on the surface of the sliding rod. The two sliding sleeves are fixedly connected to the two clamping plates respectively. Rubber pads are fixedly adhered to the opposite surfaces of the two clamping plates, and the surface of the rubber pads is provided with anti-slip texture.

[0009] This design allows for easy mounting of the frame onto the drain port of the ball valve.

[0010] Preferred technical solution 2: A limiting rod is fixedly connected to the other side of the mounting frame, and a limiting groove is formed on the surface of the connecting plate. The connecting plate is slidably sleeved on the outside of the limiting rod through the limiting groove.

[0011] This solution can restrict the movement of the connecting plate, making its movement smoother.

[0012] Preferred technical solution 3: The connecting assembly includes an insert, a connecting tube, and a rubber sealing sleeve. The connecting tube is fixedly installed at the lower end of the insert and is interconnected with it. The rubber sealing sleeve is fixedly fitted inside the insert and can be interference-fitted with the inner diameter of the ball valve's drain nozzle.

[0013] This solution allows the digital flow meter to be connected to the drain nozzle of the ball valve via a connecting component, facilitating subsequent testing.

[0014] Preferred technical solution four: The outer surface of the connecting pipe is provided with external threads, and the inner wall of the mounting pipe is provided with internal threads, so that the connecting pipe can be threaded into the interior of the mounting pipe.

[0015] This solution facilitates quick installation and disassembly of the connection components, making it easy to replace the connection components with those suitable for different ball valve drain nozzles.

[0016] Preferred technical solution five: A limiting disk is fixedly sleeved on the outer surface of the insertion tube, and a rubber sealing disk is fixedly provided on the upper surface of the limiting disk.

[0017] This solution facilitates limiting the depth of the insertion tube into the ball valve drain nozzle while simultaneously sealing the connection.

[0018] Compared with the prior art, this utility model provides a rapid detection device for internal leakage of ball valves in natural gas stations, which has the following beneficial effects:

[0019] (1) The rapid detection device for leakage of ball valve in natural gas station uses a double screw in the mounting frame to rotate the screw sleeve to drive the clamping plate to clamp the valve body. The sliding rod and the sliding sleeve ensure the smooth movement of the clamping plate. The rubber pad is anti-slip and prevents wear on the valve body. The rubber sealing sleeve in the connecting component is interference-fitted with the drain nozzle. Together with the rubber sealing plate on the limit plate, a double seal is formed to avoid gas leakage and ensure accurate detection data.

[0020] (2) The rapid detection device for internal leakage of ball valve in natural gas station can make the connecting plate move smoothly along the limit rod by rotating the screw, so as to achieve precise docking of the insertion pipe and the drain nozzle; the connecting pipe is threaded to the installation pipe, which makes it convenient to replace the connecting components to adapt to different drain nozzles; the internal leakage gas flows through the hose to the digital flow meter, which can directly display the flow data without manual calculation, thus solving the problems of low efficiency and inability to quantify leakage in traditional methods. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a cross-sectional view of the internal structure of the mounting frame of this utility model;

[0023] Figure 3 This is an exploded view of the connecting component structure of this utility model.

[0024] In the diagram: 1. Mounting frame; 2. Bidirectional screw; 3. Screw sleeve; 4. Clamping plate; 5. Lead screw; 6. Connecting plate; 7. Mounting pipe; 8. Connecting assembly; 9. Digital flow meter; 10. Sliding rod; 11. Sliding sleeve; 12. Limiting rod; 13. Insert pipe; 14. Connecting pipe; 15. Rubber sealing sleeve; 16. Limiting disc; 17. Rubber sealing disc; 18. Ball valve drain nozzle; 19. Hoses. Detailed Implementation

[0025] Please see Figure 1-3 ,

[0026] Example 1: A rapid detection device for internal leakage of ball valve in natural gas station, including a mounting frame 1 and a ball valve drain nozzle 18. A bidirectional screw 2 is rotatably installed inside the mounting frame 1. Two threaded sleeves 3 are threaded onto the surface of the bidirectional screw 2. Clamping plates 4 are fixedly connected to the surface of each of the two threaded sleeves 3.

[0027] A lead screw 5 is rotatably mounted on one side of the mounting frame 1. A connecting plate 6 is provided on the lead screw 5. A threaded hole is opened on the surface of the connecting plate 6. The connecting plate 6 is threadedly sleeved on the outside of the lead screw 5 through the threaded groove. An installation tube 7 is fixedly installed on the connecting plate 6. A connecting component 8 is provided above the installation tube 7.

[0028] The lower end of the mounting pipe 7 extends to the bottom of the connecting plate 6 and is connected to a hose 19. A digital flow meter 9 is installed at one end of the hose 19.

[0029] Example 2: The difference between this example and Example 1 is that the mounting frame 1 is internally fixedly connected to a sliding rod 10, and two sliding sleeves 11 are slidably sleeved on the surface of the sliding rod 10. The two sliding sleeves 11 are fixedly connected to the two clamping plates 4 respectively. Rubber pads are fixedly adhered to the opposite surfaces of the two clamping plates 4. The surface of the rubber pads is provided with anti-slip texture, which makes it easy to fix the mounting frame 1 to the drain port of the ball valve.

[0030] Example 3: The difference between this example and Example 1 is that a limiting rod 12 is fixedly connected to the other side of the mounting frame 1, and a limiting groove is opened on the surface of the connecting plate 6. The connecting plate 6 is slidably sleeved on the outside of the limiting rod 12 through the limiting groove, which restricts the movement of the connecting plate 6 and makes its movement more stable.

[0031] Example 4: The difference between this example and Example 1 is that the connecting component 8 includes a tube 13, a connecting tube 14, and a rubber sealing sleeve 15. The connecting tube 14 is fixedly installed at the lower end of the tube 13 and is connected to it. The rubber sealing sleeve 15 is fixedly fitted inside the tube 13. The rubber sealing sleeve 15 can be interference-fitted with the inner diameter of the ball valve's drain nozzle. The digital flow meter 9 is connected to the ball valve's drain nozzle through the connecting component 8, which facilitates subsequent testing.

[0032] Example 5: The difference between this example and Example 1 is that the outer surface of the connecting pipe 14 is provided with external threads, and the inner wall of the mounting pipe 7 is provided with internal threads. The connecting pipe 14 can be threaded into the inside of the mounting pipe 7, which facilitates the quick installation and disassembly of the connecting component 8 and makes it easy to replace the connecting component 8 suitable for different ball valve drain nozzles.

[0033] Example 6: The difference between this example and Example 1 is that the outer surface of the insertion tube 13 is fixedly fitted with a limiting plate 16, and a rubber sealing plate 17 is fixedly provided on the upper surface of the limiting plate 16 to facilitate limiting the depth of the insertion tube 13 into the ball valve drain nozzle, and at the same time to seal the connection.

[0034] In summary, the rapid leakage detection device for the ball valve in this natural gas station meets the self-locking conditions between the bidirectional screw 2 and the screw sleeve, and between the lead screw 5 and the threaded groove of the connecting plate.

[0035] In use, first select a suitable connecting component 8 according to the inner diameter of the ball valve drain nozzle 18. Connect the connecting pipe 14 in the connecting component 8 to the inner thread of the mounting pipe 7 on the connecting plate 6 via the external thread, achieving quick installation of the connecting component 8. Then, insert one end of the insertion tube 13 into the drain nozzle for initial positioning. Next, rotate the operating disc located outside the mounting frame 1 on the double-acting screw 2, causing the two screw sleeves 3 to move relative to each other, thereby driving the two clamping plates 4 to move closer together. Use the clamping plates 4 to clamp the ball valve drain nozzle 18, completing the fixation of the mounting frame 1. Then, rotate the screw 5, causing the connecting plate 6 to move smoothly, allowing the insertion tube 13 to be fully inserted into the ball valve. Inside the valve drain nozzle 18, the rubber sealing disc 17 on the limiting disc 16 on the outer surface of the insertion tube 13 is tightly fitted to the end face of the ball valve drain nozzle 18, and the rubber sealing sleeve 15 inside the insertion tube 13 forms an interference fit with the inner diameter of the ball valve drain nozzle 18, achieving double sealing at the connection. At this time, the internal leakage gas in the closed state of the ball valve flows into the hose 19 through the ball valve drain nozzle 18, insertion tube 13, connecting tube 14, and installation tube 7 in sequence. The internal leakage gas flowing through the hose 19 is detected in real time by the digital display flow meter 9 installed on the hose 19. The digital display flow meter 9 directly displays the gas flow data, thereby quickly and accurately completing the detection of the internal leakage of the ball valve.

Claims

1. A rapid detection device for internal leakage of a ball valve in a natural gas station, comprising a mounting frame (1) and a ball valve drain nozzle (18), characterized in that: The mounting frame (1) is rotatably mounted with a bidirectional screw (2), and the surface of the bidirectional screw (2) is threaded with two screw sleeves (3), and the surfaces of the two screw sleeves (3) are fixedly connected with clamps (4); A lead screw (5) is rotatably mounted on one side of the mounting frame (1). A connecting plate (6) is provided on the lead screw (5). A threaded hole is opened on the surface of the connecting plate (6). The connecting plate (6) is threadedly sleeved on the outside of the lead screw (5) through a threaded groove. An installation tube (7) is fixedly installed on the connecting plate (6). A connecting component (8) is provided above the installation tube (7). The lower end of the mounting pipe (7) extends below the connecting plate (6) and is connected to a hose (19), one end of which is equipped with a digital flow meter (9).

2. The rapid detection device for internal leakage of a ball valve in a natural gas station according to claim 1, characterized in that: The mounting frame (1) is fixedly connected to a sliding rod (10). The surface of the sliding rod (10) is slidably fitted with two sliding sleeves (11). The two sliding sleeves (11) are fixedly connected to the two clamping plates (4) respectively. The opposing surfaces of the two clamping plates (4) are fixedly bonded with rubber pads. The surface of the rubber pads is provided with anti-slip texture.

3. The rapid detection device for internal leakage of a ball valve in a natural gas station according to claim 1, characterized in that: A limiting rod (12) is fixedly connected to the other side of the mounting frame (1), and a limiting groove is opened on the surface of the connecting plate (6). The connecting plate (6) is slidably sleeved on the outside of the limiting rod (12) through the limiting groove.

4. The rapid detection device for internal leakage of ball valves in natural gas stations according to claim 1, characterized in that: The connecting assembly (8) includes a tube (13), a connecting tube (14), and a rubber sealing sleeve (15). The connecting tube (14) is fixedly installed at the lower end of the tube (13) and connected to each other. The rubber sealing sleeve (15) is fixedly sleeved inside the tube (13). The rubber sealing sleeve (15) can be interference-fitted with the inner diameter of the drain nozzle of the ball valve.

5. A rapid detection device for internal leakage of a ball valve in a natural gas station according to claim 4, characterized in that: The outer surface of the connecting pipe (14) is provided with external threads, and the inner wall of the mounting pipe (7) is provided with internal threads. The connecting pipe (14) can be threaded into the interior of the mounting pipe (7).

6. The rapid detection device for internal leakage of a ball valve in a natural gas station according to claim 5, characterized in that: The outer surface of the cannula (13) is fixedly fitted with a limiting disc (16), and a rubber sealing disc (17) is fixedly provided on the upper surface of the limiting disc (16).

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