High-voltage switch gas detection equipment with high detection precision

Abstract

The utility model relates to the technical field of gas detection equipment, in particular to high-voltage switch gas detection equipment with high detection precision, which comprises an SF6 gas detector, a detection port arranged on the rear side of the SF6 gas detector, a screw joint port screwed on the rear side of the detection port, and a detection box fixedly mounted on the rear side of the screw joint port. The inner side of the detection box is provided with a high-voltage switchgear voltage stabilization detection assembly. The high-voltage switchgear voltage stabilization detection assembly comprises a voltage stabilization air cavity, the voltage stabilization air cavity is fixedly installed on the inner side of the detection box and communicates with the screw connector, the side edge of the voltage stabilization air cavity communicates with a first through pipe and a second through pipe, the first through pipe is connected with an exhaust pump, and the output end of the exhaust pump is connected with a third through pipe. And first electromagnetic valves are sequentially mounted on the third through pipe. According to the utility model, through the arrangement of the high-voltage switch equipment detection assembly, the insulating gas in the high-voltage switch can be directly guided into the SF6 gas detector for detection, pre-sampling is not needed, and the detection process is convenient and rapid.

Description

Technical Field

[0001] This utility model relates to the field of gas detection equipment technology, and in particular to a high-voltage switch gas detection equipment with high detection accuracy. Background Technology

[0002] High-voltage switch gas detection equipment is a specialized device used to monitor and analyze the gas state in high-voltage switchgear.

[0003] High-voltage switchgear is typically filled with high-voltage SF6 gas. SF6 gas has excellent insulating properties, and in daily use, it is necessary to periodically test the high-voltage SF6 gas in the switchgear. By monitoring the composition of the insulating gas, the equipment can promptly detect potential fault signs, such as gas leaks or abnormal changes in density composition, thus issuing early warnings and preventing the occurrence or escalation of faults. Current technology often uses SF6 gas detectors for detection, but these cannot directly detect the insulating gas in high-voltage switchgear. Pre-sampling of the filling gas from the switchgear is required, followed by testing of the sample gas. This is because the insulating gas is under high pressure in high-voltage switchgear, making direct detection impossible and requiring pre-sampling. This makes the actual testing process cumbersome and inconvenient. To overcome these technical shortcomings, we propose a high-precision high-voltage switchgear gas detection device. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-voltage switch gas detection device with high detection accuracy.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-voltage switchgear gas detection device with high detection accuracy includes an SF6 gas detector. The SF6 gas detector has a detection port on its rear side, and a screw interface is screwed to the rear side of the detection port. A detection box is fixedly installed behind the screw interface, and a high-voltage switchgear voltage stabilization detection component is arranged inside the detection box. The high-voltage switchgear voltage stabilization detection component includes a voltage stabilizing chamber, which is fixedly installed inside the detection box and connected to the screw interface. A first pipe and a second pipe are connected to the side of the voltage stabilizing chamber. The first pipe is connected to an exhaust pump, and a third pipe is connected to the output end of the exhaust pump. A first solenoid valve and a first check valve are sequentially installed on the third pipe, and a second solenoid valve and a second check valve are sequentially installed on the second pipe.

[0007] Preferably, the voltage stabilization and detection component of the high-voltage switchgear further includes an access pipe, the third pipe and the second pipe are connected to the access pipe together, the end of the access pipe is connected to a corrugated pipe, the end of the corrugated pipe is installed with a pipe seat, a nut is rotatably installed on the pipe seat, and a pressure gauge is fixedly installed on the upper side of the pressure stabilizing air chamber.

[0008] Preferably, the SF6 gas detector is equipped with a portable handle that can be rotated on.

[0009] Preferably, the pressure gauge probe extends to the inside of the pressure-stabilizing chamber.

[0010] Preferably, a cover is screwed onto the upper side of the testing box, and a controller is installed on the cover.

[0011] Preferably, the inner side of the nut has a threaded groove, and the outer side of the nut is hexagonal.

[0012] Preferably, a sealing ring is provided at the end of the tube seat.

[0013] Preferably, the corrugated pipe is a high-strength stainless steel corrugated pipe.

[0014] Compared with related technologies, the high-voltage switch gas detection device with high detection accuracy proposed in this utility model has the following beneficial effects:

[0015] In this invention, a high-precision high-voltage switch gas detection device is described. Through a high-voltage switch detection component, a bellows end screw is connected to the high-voltage switch in the voltage stabilizing component. High-pressure SF6 gas from the high-voltage switch can flow directly into the stabilizing chamber through the bellows, inlet pipe, and second-way pipe. A pressure gauge in the stabilizing chamber monitors the gas pressure in real time. When the gas pressure in the stabilizing chamber reaches a detectable value, the second solenoid valve closes, setting the gas pressure in the stabilizing chamber to the detection setpoint. The stabilizing chamber is connected to the detection port of the SF6 gas detector via a screw interface. Once connected, an SF6 gas detector can be used to detect the gas concentration and related components in SF6. The insulating gas in the high-voltage switch can be directly introduced into the SF6 gas detector for testing without prior sampling. The testing process is convenient and quick. After the test is completed, the first solenoid valve and the exhaust pump start synchronously, which can discharge the gas in the pressure stabilizing chamber into the high-voltage switchgear through the first pipe, the third pipe, the inlet pipe, and the bellows. Since SF6 gas is toxic, this method reduces the decrease in SF6 gas concentration in the high-voltage switchgear and also avoids leakage pollution, thus improving the safety of the test. Attached Figure Description

[0016] Figure 1A three-dimensional structural diagram of a high-precision high-voltage switch gas detection device proposed in this utility model. Figure 1 ;

[0017] Figure 2 A three-dimensional structural diagram of a high-precision high-voltage switch gas detection device proposed in this utility model. Figure 2 ;

[0018] Figure 3 This is a three-dimensional disassembly diagram of a high-voltage switch gas detection device with high detection accuracy proposed in this utility model;

[0019] Figure 4 This is a partial three-dimensional structural diagram of a high-voltage switch gas detection device with high detection accuracy proposed in this utility model;

[0020] Figure 5 This is a partial three-dimensional cross-sectional structural diagram of a high-voltage switch gas detection device with high detection accuracy proposed in this utility model.

[0021] In the diagram: 1. SF6 gas detector; 2. Portable handle; 3. Detection port; 4. Detection box; 5. Screw connector; 6. High-voltage switchgear voltage stabilization detection component; 61. Voltage stabilizing chamber; 62. Pressure gauge; 63. First connecting pipe; 64. Second connecting pipe; 65. Exhaust pump; 66. Third connecting pipe; 67. First solenoid valve; 68. First check valve; 69. Second solenoid valve; 610. Second check valve; 611. Connecting pipe; 612. Bellows; 613. Pipe seat; 614. Nut; 615. Sealing ring; 7. Box cover; 8. Controller. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Reference Figure 1-5 A high-voltage switch gas detection device with high detection accuracy includes an SF6 gas detector 1, a detection port 3 is provided on the rear side of the SF6 gas detector 1, a screw interface 5 is screwed to the rear side of the detection port 3, a detection box 4 is fixedly installed on the rear side of the screw interface 5, and a high-voltage switch equipment voltage stabilization detection component 6 is provided inside the detection box 4.

[0024] In this method, the high-voltage switchgear voltage stabilization detection component 6 includes a voltage stabilizing air chamber 61, which is fixedly installed inside the detection box 4 and connected to the screw interface 5. A first pipe 63 and a second pipe 64 are connected and installed on the side of the voltage stabilizing air chamber 61. The first pipe 63 is connected to an exhaust pump 65, and a third pipe 66 is connected to the output end of the exhaust pump 65. A first solenoid valve 67 and a first check valve 68 are installed sequentially on the third pipe 66. A second solenoid valve 69 and a second check valve 610 are installed sequentially on the second pipe 64. The third pipe 66 and the second pipe 64 are connected to an inlet pipe 611. A bellows 612 is connected to the end of the inlet pipe 611. A pipe seat 613 is installed at the end of the bellows 612. A nut 614 is rotatably installed on the pipe seat 613. A pressure gauge 62 is fixedly installed on the upper side of the voltage stabilizing air chamber 61, and the detection probe of the pressure gauge 62 extends to the inside of the voltage stabilizing air chamber 61.

[0025] With the above configuration, the first one-way valve 68 allows the third pipe 66 to exhaust gas only into the inlet pipe 611, and the second one-way valve 610 allows the second pipe 64 to supply gas only into the pressure stabilizing chamber 61.

[0026] In this method, a cover 7 is screwed onto the upper side of the detection box 4, and a controller 8 is installed on the cover 7.

[0027] With the above settings, the controller 8 can control the working status of the exhaust pump 65, the first solenoid valve 67 and the second solenoid valve 69, and can also receive the gas pressure data inside the pressure stabilizing chamber 61 fed back from the pressure gauge 62.

[0028] In this method, the inner side of the nut 614 is provided with a threaded groove, and the outer side of the nut 614 is hexagonal.

[0029] With the above-mentioned configuration, the threaded groove on the inner side of the nut 614 allows the nut 614 to be rotated into the high-voltage switchgear, facilitating connection and installation operations. In addition, the outer side of the nut 614 is hexagonal, which allows the nut 614 to be rotated by a handle.

[0030] In this configuration, a sealing ring 615 is provided at the end of the tube seat 613.

[0031] With the above-described configuration, the sealing ring 615 ensures that when the nut 614 is connected to the high-voltage switchgear, the sealing ring 615 at the end of the socket 613 can form a sealed connection with the port of the high-voltage switchgear, improving airtightness during testing and preventing gas leakage.

[0032] In this method, the corrugated pipe 612 is a high-strength stainless steel corrugated pipe.

[0033] With the above-mentioned configuration, the corrugated pipe 612 is made of high-strength stainless steel, which gives it both high strength and elongation deformation capability. This makes it easier for the equipment to be connected to the port of high-voltage switchgear when the corrugated pipe 612 is used.

[0034] In this method, a portable handle 2 is rotatably mounted on the SF6 gas detector 1.

[0035] The above-described design, including the portable handle 2, makes this invention easy to carry and more convenient to use.

[0036] The working principle of the high-precision high-voltage switch gas detection device provided by this utility model is as follows:

[0037] In use, the bellows 612 is stretched, and the nut 614 at the end of the bellows 612 is screwed onto the port of the high-voltage switchgear. The port of the high-voltage switchgear is then opened, allowing the high-voltage insulating gas (SF6) in the switchgear to flow into the pressure-stabilizing chamber 61 through the bellows 612, the inlet pipe 611, and the second-way pipe 64. The pressure gauge 62 in the pressure-stabilizing chamber 61 can monitor the gas pressure in real time. When the gas pressure in the pressure-stabilizing chamber 61 reaches a detectable value, the second solenoid valve 69 closes. The pressure in the stabilizing chamber 61 is set to the detection value. The stabilizing chamber 61 is connected to the detection port 3 of the SF6 gas detector 1 via the screw interface 5. At this time, the SF6 gas detector 1 can be used to detect the gas concentration and related components in SF6. After the detection is completed, the first solenoid valve 67 and the exhaust pump 65 are started synchronously, which can discharge the gas in the stabilizing chamber 61 into the high-voltage switchgear through the first pipe 63, the third pipe 66, the inlet pipe 611, and the bellows 612, avoiding leakage and pollution and improving the safety during detection.

[0038] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-voltage switch gas detection device with high detection accuracy, characterized in that, Includes an SF6 gas detector (1), the SF6 gas detector (1) has a detection port (3) on the rear side, a screw interface (5) is screwed to the rear side of the detection port (3), a detection box (4) is fixedly installed on the rear side of the screw interface (5), and a high voltage switchgear voltage regulation detection component (6) is provided inside the detection box (4); The high-voltage switchgear voltage regulation detection component (6) includes a voltage regulation air chamber (61), which is fixedly installed inside the detection box (4) and connected to the screw interface (5). A first pipe (63) and a second pipe (64) are connected to the side of the voltage regulation air chamber (61). An exhaust pump (65) is connected to the first pipe (63). A third pipe (66) is connected to the output end of the exhaust pump (65). A first solenoid valve (67) and a first check valve (68) are installed on the third pipe (66) in sequence. A second solenoid valve (69) and a second check valve (610) are installed on the second pipe (64) in sequence.

2. The high-precision high-voltage switch gas detection device according to claim 1, characterized in that, The high-voltage switchgear voltage regulation and detection component (6) also includes an access pipe (611). The third pipe (66) and the second pipe (64) are connected to the access pipe (611). A corrugated pipe (612) is connected to the end of the access pipe (611). A pipe seat (613) is installed at the end of the corrugated pipe (612). A nut (614) is rotatably installed on the pipe seat (613). A pressure gauge (62) is fixedly installed on the upper side of the voltage regulating chamber (61).

3. The high-precision high-voltage switch gas detection device according to claim 1, characterized in that, The SF6 gas detector (1) is equipped with a portable handle (2) that rotates on it.

4. The high-precision high-voltage switch gas detection device according to claim 2, characterized in that, The pressure gauge (62) probe extends into the pressure stabilizing chamber (61).

5. The high-precision high-voltage switch gas detection device according to claim 1, characterized in that, The detection box (4) is screwed to the upper side with a box cover (7), and a controller (8) is installed on the box cover (7).

6. The high-precision high-voltage switch gas detection device according to claim 2, characterized in that, The inner side of the nut (614) is provided with a threaded groove, and the outer side of the nut (614) is hexagonal.

7. A high-precision high-voltage switch gas detection device according to claim 2, characterized in that, A sealing ring (615) is provided at the end of the tube seat (613).

8. A high-precision high-voltage switch gas detection device according to claim 2, characterized in that, The corrugated pipe (612) is a high-strength stainless steel corrugated pipe.

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