A ball valve internal leakage detection device

Abstract

The utility model relates to natural gas pipeline detection device technical field, concretely relates to a ball valve internal leakage detection device, include: high pressure hose for the through connection in the ball valve body of being detected is equipped with the blowdown valve port, high pressure hose other end detachable installation has pressure gauge, flowmeter and stop valve in proper order, pressure gauge and flowmeter are used for detecting whether the ball valve body of being detected is internal leakage, the stop valve tail end detachable installation has the pipe for the outside row gas in the ball valve body of being detected, this ball valve internal leakage detection device can connect with the blowdown valve of ball valve through high pressure hose in the actual use process, can gather the pressure change data in valve cavity through pressure gauge directly to judge the internal leakage condition of ball valve quickly, can further quantitatively judge the internal leakage degree of ball valve through the data of flowmeter collection, the device can effectively solve the problem that the prior art cannot detect the internal leakage condition of valve cavity quantitatively, can directly and conveniently detect the internal leakage condition of natural gas gas transmission pipeline ball valve.

Description

Technical Field

[0001] This utility model relates to the technical field of natural gas pipeline inspection devices, specifically to a ball valve internal leakage detection device. Background Technology

[0002] In the operation of natural gas pipelines, the sealing performance of ball valves is crucial. Internal leakage not only wastes natural gas but may also cause safety hazards. Therefore, it is necessary to effectively detect internal leakage.

[0003] Currently, online detection of internal leakage in ball valves of natural gas pipelines commonly uses methods such as valve cavity venting, process judgment, and valve cavity pressure detection, but all of these methods have shortcomings. The valve cavity venting method is simple to operate, but it lacks quantitative detection and analysis, and there are certain safety risks associated with on-site sewage discharge or venting of natural gas. Although the process judgment method and valve cavity pressure detection method can quantitatively detect the internal leakage of valves, the calculation formulas for the internal leakage rate are difficult for production operation and maintenance personnel to understand and master. The calculation involves many parameters that are not easy to obtain, resulting in poor on-site operability.

[0004] Existing methods and devices are insufficient to meet practical testing needs. Therefore, we need a device that can intuitively and conveniently detect internal leakage in ball valves of natural gas pipelines. In view of this, we propose a ball valve internal leakage detection device. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings mentioned in the background art and provide a ball valve internal leakage detection device.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A ball valve internal leakage detection device, comprising: High-pressure hose, used to connect to the drain valve port on the ball valve body to be tested; The other end of the high-pressure hose is detachably equipped with a pressure gauge, a flow meter and a shut-off valve in sequence. The pressure gauge and flow meter are used to detect whether the ball valve body under test has internal leakage. The shut-off valve has a detachable conduit for venting gas from the ball valve body under test.

[0007] Preferably, the pressure gauge is installed on a three-way connector, and the other two joints of the three-way connector are respectively connected to the high-pressure hose and the flow meter.

[0008] Preferably, the tee fitting is provided with a first threaded connector and a second threaded connector that can be detachably connected to the high-pressure hose and the flow meter, respectively.

[0009] Preferably, a third threaded connector is provided between the flow meter outlet end and the shut-off valve inlet end for detachable connection.

[0010] Preferably, both ends of the high-pressure hose are fixedly connected to internally threaded metal hose connectors for threaded installation at the first threaded connector and the drain valve port.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This ball valve internal leakage detection device can be connected to the ball valve drain valve via a high-pressure hose during actual use. It can directly collect pressure change data in the valve cavity using a pressure gauge to quickly determine the internal leakage of the ball valve, and can further quantitatively determine the degree of internal leakage by collecting data from a flow meter. This device can effectively solve the problem that existing technologies cannot quantitatively detect internal leakage in the valve cavity, and can intuitively and conveniently detect the internal leakage of ball valves in natural gas transmission pipelines. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the installation of an embodiment of the overall structure of this utility model; Figure 3 This is a flowchart of an embodiment of the present utility model.

[0013] The meanings of the labels in the diagram are as follows: 1. Pressure gauge; 2. Tee connector; 3. First threaded connector; 4. Second threaded connector; 5. Flow meter; 6. Third threaded connector; 7. Gate valve; 8. High-pressure hose; 9. Drain valve; 10. Ball valve body to be tested. Detailed Implementation

[0014] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] Please see Figures 1-3 The present invention will describe the above technical solution in detail through the following embodiments: This embodiment of the ball valve internal leakage detection device, such as Figure 1 and Figure 2As shown, in order to detect internal leakage by connecting to the ball valve body 10 under test, a high-pressure hose 8 with internally threaded metal hose connectors at both ends is connected to the drain valve 9 port on the ball valve body 10 under test. At the other end of the high-pressure hose 8, a pressure gauge 1 and a flow meter 5 are connected through a three-way connector 2. The outlet end of the flow meter 5 is connected to a shut-off valve 7. In this embodiment, in order to facilitate the disassembly and assembly of the device, a first threaded connector 3, a second threaded connector 4, and a third threaded connector 6 are respectively provided between the high-pressure hose 8 and the pressure gauge 1, between the flow meter 5 and the pressure gauge 1, and between the flow meter 5 and the shut-off valve 7.

[0016] The working principle of the ball valve internal leakage detection device in this embodiment is as follows: In this embodiment, the ball valve internal leakage detection device is connected to the drain valve 9 of the ball valve body 10 to be tested through the high-pressure hose 8 during ball valve internal leakage detection; the specific detection method is as follows: First, check that the pressure gauge 1 and flow meter 5 are intact, open the shut-off valve 7 of the detection device, and completely close the ball valve body 10 to be tested; open the drain valve 9 of the ball valve body 10 to drain the sewage. After the sewage is completely discharged from the valve cavity, connect the device to the drain valve 9 and observe the readings of the pressure gauge 1 and flow meter 5. Wait for the readings of the pressure gauge 1 and flow meter 5 to stabilize; if the reading of the pressure gauge 1 is zero and the instantaneous flow of the flow meter 5 is also zero, close the shut-off valve 7 of the detection device and wait for 5-10 minutes. If the data of both are still zero, then the ball valve body 10 to be tested has not experienced internal leakage; if the readings of the pressure gauge 1 and flow meter 5 are not zero after closing the shut-off valve 7 and waiting for 5-10 minutes, then the ball valve body 10 to be tested has experienced internal leakage.

[0017] Meanwhile, if the readings of pressure gauge 1 and flow meter 5 are not zero, the ball valve body 10 under test has internal leakage, and the reading of flow meter 5 is the amount of internal leakage of the valve body. Before testing, the airtightness of the device can be checked by closing the shut-off valve 7, connecting the device to the drain valve 9, and then closing the drain valve 9. There is no need to add other airtightness testing devices, which can improve the testing accuracy and efficiency. At the same time, when there is hot work or valve chamber or other confined space at the testing site, a high-pressure hose 8 can be connected to the shut-off valve 7 of the testing device to vent the gas in the valve chamber to an open outdoor area, reducing the risk of on-site natural gas discharge and improving the safety of the testing operation.

[0018] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A ball valve internal leakage detection device, characterized in that: include: High-pressure hose (8) is used to connect to the drain valve (9) port on the ball valve body (10) to be tested; The other end of the high-pressure hose (8) is detachably equipped with a pressure gauge (1), a flow meter (5) and a shut-off valve (7). The pressure gauge (1) and the flow meter (5) are used to detect whether the ball valve body (10) under test has internal leakage. The shut-off valve (7) is detachably equipped with a conduit for venting the gas inside the ball valve body (10) to be tested.

2. The ball valve internal leakage detection device as described in claim 1, characterized in that: The pressure gauge (1) is installed on the three-way connector (2), and the other two joints of the three-way connector (2) are respectively connected to the high-pressure hose (8) and the flow meter (5).

3. The ball valve internal leakage detection device as described in claim 2, characterized in that: The tee connector (2) is provided with a first threaded connector (3) and a second threaded connector (4) that can be detachably connected to the high-pressure hose (8) and the flow meter (5).

4. The ball valve internal leakage detection device as described in claim 1, characterized in that: A third threaded connector (6) is provided between the outlet end of the flow meter (5) and the inlet end of the shut-off valve (7).

5. The ball valve internal leakage detection device as described in claim 3, characterized in that: The high-pressure hose (8) is fixedly connected at both ends with internally threaded metal hose connectors for threaded installation at the first threaded connector (3) and the valve port of the drain valve (9).

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