A GIS switch quality detection device with multi-angle adjustment function

Abstract

The utility model relates to detection technical field and disclose a kind of GIS switch quality detection device with multi-angle adjustment function, by bottom plate, control cabinet, circuit breaker, gas injection port, current transformer, protective pipeline, partial discharge detector, electric control line and ultrasonic sensor etc. are constituted, and fixedly connected fixed rod on bottom plate, the side of the fixed rod towards protective pipe is provided with sliding slot, the inside sliding connection of the sliding slot has ball, the side fixedly connected with guide rod of the ball towards protective pipeline.The utility model is fixed in the sleeve inside by buckle with ultrasonic sensor, staff can push ultrasonic sensor to move, so that ultrasonic sensor is connected with ball in the inside sliding of sliding slot by fixed block and guide rod, if need to detect back, ultrasonic sensor can be taken out from sleeve, because spiral section is provided on electric control line, so that the length of electric control line can stretch or retract, it is convenient to detect each angle.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, and in particular to a GIS switch quality testing device with multi-angle adjustment function. Background Technology

[0002] GIS is the abbreviation for Gas Insulated Enclosed Switchgear, a type of metal-enclosed switchgear. It typically uses a gas (sulfur hexafluoride) at a pressure higher than atmospheric pressure as the insulating medium. It consists of circuit breakers, disconnectors, grounding switches, transformers, surge arresters, busbars, connectors, and outgoing terminals, all of which are enclosed in a grounded metal casing.

[0003] Existing GIS switches require comprehensive inspection at least once a year during use, with key areas requiring more frequent inspections. The primary focus is on checking the airtightness of the gas injection port to prevent sulfur hexafluoride leakage. Secondly, partial discharge detection is performed. This involves using ultrasonic sensors to capture 20kHz-200kHz ultrasonic signals generated by internal discharges, enabling non-invasive fault diagnosis. The ultrasonic sensors sequentially inspect the entire device, requiring continuous adjustments to both the inspection and partial discharge detector positions, resulting in lengthy inspection times and a cumbersome process. Therefore, a GIS switch quality inspection device with multi-angle adjustment capabilities is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a GIS switch quality detection device with multi-angle adjustment function. It has the advantages of conveniently performing partial discharge detection at various angles of the equipment, detecting sulfur hexafluoride leakage at the gas injection port, and collecting sulfur hexafluoride gas after leakage is detected, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a GIS switch quality testing device with multi-angle adjustment function, including a base plate for installation and support. A control cabinet for control is fixedly installed on the left side of the top surface of the base plate. A circuit breaker for protecting power grid equipment is fixedly installed on the right side of the control cabinet via a mounting bracket on the top surface of the base plate. A gas injection port for injecting sulfur hexafluoride is fixedly connected to the side wall of the circuit breaker. A current transformer for converting high current to low current is fixedly connected to the upper part of the side wall of the circuit breaker. A protective pipe for preventing sulfur hexafluoride from escaping is fixedly connected to the end of the current transformer away from the circuit breaker via a flange. A partial discharge detector for detecting partial discharge is fixedly connected to the top surface of the base plate via a fixing bracket. An electrical control line for control is fixedly connected to the output end of the partial discharge detector. An ultrasonic sensor for detecting ultra-high frequency signals is fixedly connected to the end of the electrical control line away from the partial discharge detector. A sliding device is provided on the base plate, and a sulfur hexafluoride detection device is provided on the sliding device.

[0006] Preferably, the sliding device includes a fixed rod for support, and the fixed rod has a sliding groove on the side facing the protective pipe, and a ball bearing for movement is slidably connected inside the sliding groove.

[0007] Preferably, a guide rod is fixedly connected to the side of the ball facing the protective pipe, a fixing block for installation is fixedly connected to the side of the guide rod away from the ball, and a retaining sleeve for limiting the position is fixedly connected to the side wall of the fixing block away from the guide rod.

[0008] Preferably, the ultrasonic sensor is fixedly connected to a buckle for locking, and the buckle is locked inside the sleeve.

[0009] Preferably, the sulfur hexafluoride detection device includes a connecting rod for connection, the connecting rod being fixedly connected to the middle of the bottom surface of the fixing block, and the bottom end of the connecting rod being fixedly connected to a pressure-resistant glass bottle for holding sulfur hexafluoride.

[0010] Preferably, the inside of the pressure-resistant glass bottle is filled with tin foil for detecting sulfur hexafluoride leakage, and a conduit for transmitting sulfur hexafluoride is fixedly connected to the center of the bottom surface of the pressure-resistant glass bottle.

[0011] Preferably, the end of the conduit away from the pressure-resistant glass bottle is fixedly connected to a quick-connect coupling for rapid engagement, and the pressure-resistant glass bottle is provided with an extraction device.

[0012] Preferably, the extraction device includes a quick-connect interface for rapid engagement, the quick-connect interface being fixedly connected to the side wall of the pressure-resistant glass bottle and connected to the pressure-resistant glass bottle.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model, through the design of a fixed rod, sliding groove, ball bearing, guide rod, fixed block, and clamp, allows the partial discharge detector to be placed on a fixed frame when the equipment needs to perform partial discharge detection. The ultrasonic sensor is then fixed inside the clamp by a buckle. The operator can push the ultrasonic sensor to move, causing it to slide inside the sliding groove along with the ball bearing through the connection between the fixed block and the guide rod. If the back side needs to be tested, the ultrasonic sensor can be removed from the clamp for handheld testing. The spiral section on the control cable allows the cable to be stretched or retracted, facilitating partial discharge detection and enabling testing from various angles.

[0014] 2. This utility model, through the design of a quick-connect coupling, a pressure-resistant glass bottle, and tin foil, allows for the fixing of a conduit to the gas inlet using the quick-connect coupling when an airtightness test is required. If there is a leak at the gas inlet, sulfur hexafluoride gas will enter the pressure-resistant glass bottle through the conduit. Since the density of the tin foil is less than that of the sulfur hexafluoride gas, the tin foil will rise inside the pressure-resistant glass bottle due to the density difference, thus allowing for a direct detection of whether there is a leak at the gas inlet. Furthermore, the pressure-resistant glass bottle is equipped with graduations, allowing for timing during the test. The leakage rate of sulfur hexafluoride can then be calculated based on the time it takes for the pressure-resistant glass bottle to be filled with sulfur hexafluoride, combined with the graduations, facilitating equipment maintenance by staff.

[0015] 3. This utility model, through the design of quick-connect interface, quick-connect connector two, and vacuum pump, allows for the following: If a sulfur hexafluoride leak is detected at the gas injection port, the leaking sulfur hexafluoride will guide the conduit into the pressure-resistant glass bottle. At this time, the vacuum pump is connected to the quick-connect interface via quick-connect connector two, and then the sulfur hexafluoride inside the pressure-resistant glass bottle is extracted using the vacuum pump, preventing the sulfur hexafluoride from being released into the atmosphere. Simultaneously, the collected sulfur hexafluoride gas can be reused, reducing waste. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the fixing rod of this utility model; Figure 3 This is a schematic diagram of the structure of the ultrasonic sensor of this utility model; Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the internal structure of the pressure-resistant glass bottle of this utility model.

[0017] In the diagram: 1. Base plate; 101. Fixing rod; 102. Slide groove; 103. Ball bearing; 104. Guide rod; 105. Fixing block; 106. Sleeve; 107. Connecting rod; 108. Pressure-resistant glass bottle; 109. Tin paperboard; 110. Scale line; 111. Conduit; 112. Quick connector one; 113. Quick connector; 114. Quick connector two; 115. Evacuation cylinder; 2. Control cabinet; 3. Circuit breaker; 4. Gas inlet; 5. Current transformer; 6. Protective pipeline; 7. Disconnecting switch; 8. Surge arrester; 9. Outgoing bushing; 10. Support rod; 11. Partial discharge detector; 12. Electrical control line; 13. Ultrasonic sensor; 131. Buckle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-5 A GIS switch quality testing device with multi-angle adjustment function includes a base plate 1 for installation and support. A control cabinet 2 for control is fixedly installed on the top left side of the base plate 1. A circuit breaker 3 for protecting power grid equipment is fixedly installed on the top right side of the base plate 1 via a mounting bracket (please refer to the instruction manual for left and right positions). Figure 1The circuit breaker 3 has a gas injection port 4 fixedly connected to its side wall for injecting sulfur hexafluoride (SF6), facilitating the injection of SF6 insulating gas into the circuit breaker 3. A current transformer 5 for converting high current to low current is fixedly connected to the upper part of the side wall of the circuit breaker 3. A protective conduit 6 for preventing SF6 leakage is fixedly connected via a flange to the end of the current transformer 5 away from the circuit breaker 3. The protective conduit 6 is internally connected to the circuit breaker 3, the current transformer 5, and the surge arrester 8. A disconnecting switch 7 for isolating the circuit is fixedly installed on the top surface of the protective conduit 6 via a mounting bracket. A surge arrester 8 for preventing operational overvoltage and limiting lightning strikes is fixedly connected via a flange to the ground of the protective conduit 6. The protective conduit 6 is located away from the current transformer. One end of the protective pipe 6 is fixedly connected to an outlet sleeve 9 for connecting an external cable. The bottom of the protective pipe 6 is fixedly connected to a support rod 10 below the outlet sleeve 9. The support rod 10 supports the protective pipe 6. The top surface of the base plate 1 is fixedly connected to a partial discharge detector 11 for detecting partial discharge via a fixing frame. The output end of the partial discharge detector 11 is fixedly connected to a control line 12 for control. The control line 12 is provided with a spiral section to facilitate the extension and retraction of the control line 12. The end of the control line 12 away from the partial discharge detector 11 is fixedly connected to an ultrasonic sensor 13 for detecting ultra-high frequency signals. A sliding device is provided on the base plate 1, and a sulfur hexafluoride detection device is provided on the sliding device.

[0020] Please see Figure 2 and Figure 4 The sliding device includes a fixed rod 101 for support. The fixed rod 101 has a sliding groove 102 on the side facing the protective pipe 6. A ball bearing 103 for movement is slidably connected inside the sliding groove 102 to ensure that the ball bearing 103 can slide inside the sliding groove 102, thereby adjusting the position of the ultrasonic sensor 13 and facilitating the replacement of the ultrasonic sensor 13 to adjust the detection position of the equipment.

[0021] Please see Figure 3 The ball bearing 103 is fixedly connected to a guide rod 104 on the side facing the protective pipe 6. A fixing block 105 for installation is fixedly connected to the side of the guide rod 104 away from the ball bearing 103, so that the fixing block 105 can move the ball bearing 103 through the guide rod 104. A retaining sleeve 106 for limiting is fixedly connected to the side wall of the fixing block 105 away from the guide rod 104.

[0022] Please see Figure 3 The ultrasonic sensor 13 is fixedly connected to a buckle 131 for snapping. The buckle 131 snaps into the inside of the sleeve 106, which facilitates the ultrasonic sensor 13 to be snapped into the sleeve 106 by the buckle 131, and also facilitates the ultrasonic sensor 13 to be taken out of the sleeve 106 for handheld testing.

[0023] Please see Figure 5 The sulfur hexafluoride detection device includes a connecting rod 107 for connection. The connecting rod 107 is fixedly connected to the middle of the bottom surface of the fixing block 105. The bottom end of the connecting rod 107 is fixedly connected to a pressure-resistant glass bottle 108 for holding sulfur hexafluoride. The pressure-resistant glass bottle 108 is used to hold the leaked sulfur hexafluoride gas and is convenient for observation.

[0024] Please see Figure 5 The pressure-resistant glass bottle 108 contains a tin cardboard 109 for detecting sulfur hexafluoride (SF6) leaks. The outer surface of the pressure-resistant glass bottle 108 is provided with scale lines 110 for observation. Since the density of the tin cardboard 109 is less than that of SF6 gas, after SF6 gas enters the pressure-resistant glass bottle 108, the tin cardboard 109 will float upward inside the pressure-resistant glass bottle 108 due to the density difference. This allows the staff to visually determine if there is a SF6 gas leak at the gas inlet 4. A conduit 111 for transmitting SF6 is fixedly connected to the middle of the bottom surface of the pressure-resistant glass bottle 108.

[0025] Please see Figure 1 , Figure 2 and Figure 5 The end of the conduit 111 away from the pressure-resistant glass bottle 108 is fixedly connected to a quick-connect coupling 112 for quick snap-fit. The conduit 111 is provided with a spiral section to facilitate the extension and retraction of the conduit 111. It is quickly snapped into the gas injection port 4 through the quick-connect coupling 112, so that when there is a leak at the gas injection port 4, sulfur hexafluoride gas can enter the pressure-resistant glass bottle 108 through the quick-connect coupling 112 and the conduit 111. The pressure-resistant glass bottle 108 is provided with an extraction device.

[0026] Please see Figure 5 The extraction device includes a quick-connect interface 113 for rapid engagement. The quick-connect interface 113 is fixedly connected to the side wall of the pressure-resistant glass bottle 108 and is in communication with the pressure-resistant glass bottle 108.

[0027] Please see Figure 5 The quick connector 113 is snapped with a second quick connector 114 for quick connection. The end of the second quick connector 114 away from the quick connector 113 is fixedly connected to a vacuum pump 115 for extracting sulfur hexafluoride. The vacuum pump 115 is connected to the second quick connector 114. After the sulfur hexafluoride gas enters the pressure-resistant glass bottle 108, the vacuum pump 115 can be snapped with the quick connector 114 at the quick connector 113, so that the sulfur hexafluoride gas inside the pressure-resistant glass bottle 108 can be extracted by the vacuum pump 115 for collection or reuse.

[0028] Working principle: When a GIS switch needs to be tested, the partial discharge detector 11 is placed on the fixed frame, and then the ultrasonic sensor 13 is snapped into the sleeve 106 via the buckle 131. During use, the operator can push the ultrasonic sensor 13, causing it to move along with the fixed block 105 and the guide rod 104. The guide rod 104 then slides the ball bearing 103 inside the slide groove 102, thus achieving multi-directional detection. If a different angle is needed, the operator can remove the buckle 131 from the sleeve 106 and then hold the ultrasonic sensor 13 to test the GIS switch. Because the control cable 12 has a spiral section, it can be extended or retracted freely, allowing the ultrasonic sensor 13 to perform multi-angle detection of the GIS switch, improving the flexibility of the test. Secondly, when sulfur hexafluoride leakage detection is required, the quick connector 112 is snapped into the gas injection port 4. If there is a leak at the gas injection port 4... If sulfur hexafluoride (SF6) gas leaks, the gas will be transmitted through quick connector 112 and conduit 111 into the pressure-resistant glass bottle 108. Since the density of the tin foil 109 is less than that of sulfur hexafluoride, the tin foil 109 inside the pressure-resistant glass bottle 108 will float upwards after the SF6 gas enters. At this point, workers can visually determine if there is a SF6 gas leak. If the tin foil 109 does not move, it indicates that there is no SF6 gas at the injection port 4. If there is a leak of sulfur hexafluoride gas, the pump 115 can be connected to the quick connector 113 via quick connector 2 114. Then, the sulfur hexafluoride gas inside the pressure-resistant glass bottle 108 can be extracted through the pump 115. Next, the staff can time the sulfur hexafluoride gas leak detection and then calculate the leakage rate of sulfur hexafluoride by matching the scale line 110 on the pressure-resistant glass bottle 108 with the timed time. This makes it convenient for the staff to inspect and repair the leak at the gas inlet 4.

Claims

1. A GIS switch quality inspection device with multi-angle adjustment function, comprising a base plate (1) for installation and support, characterized in that: A control cabinet (2) for control is fixedly installed on the left side of the top surface of the base plate (1). A circuit breaker (3) for protecting the power grid equipment is fixedly installed on the right side of the control cabinet (2) via a mounting bracket on the top surface of the base plate (1). A gas injection port (4) for injecting sulfur hexafluoride is fixedly connected to the side wall of the circuit breaker (3). A current transformer (5) for converting high current to low current is fixedly connected to the upper part of the side wall of the circuit breaker (3). The end of the current transformer (5) away from the circuit breaker (3) is fixedly connected via a flange. A protective pipe (6) for preventing sulfur hexafluoride from escaping is provided. A partial discharge detector (11) for detecting partial discharge is fixedly connected to the top surface of the base plate (1) by a fixing frame. An electrical control line (12) for control is fixedly connected to the output end of the partial discharge detector (11). An ultrasonic sensor (13) for detecting ultra-high frequency signals is fixedly connected to the end of the electrical control line (12) away from the partial discharge detector (11). A sliding device is provided on the base plate (1), and a sulfur hexafluoride detection device is provided on the sliding device.

2. The GIS switch quality inspection device with multi-angle adjustment function according to claim 1, characterized in that: The sliding device includes a fixed rod (101) for support, and the fixed rod (101) has a sliding groove (102) on the side facing the protective pipe (6). The sliding groove (102) is slidably connected with a ball (103) for movement.

3. The GIS switch quality inspection device with multi-angle adjustment function according to claim 2, characterized in that: The ball (103) is fixedly connected to a guide rod (104) on the side facing the protective pipe (6). The guide rod (104) is fixedly connected to a fixing block (105) for installation on the side away from the ball (103). The fixing block (105) is fixedly connected to a retaining sleeve (106) for limiting the position on the side wall away from the guide rod (104).

4. The GIS switch quality inspection device with multi-angle adjustment function according to claim 3, characterized in that: The ultrasonic sensor (13) is fixedly connected to a buckle (131) for snapping, and the buckle (131) snaps into the inside of the sleeve (106).

5. A GIS switch quality testing device with multi-angle adjustment function according to claim 1, characterized in that: The sulfur hexafluoride detection device includes a connecting rod (107) for connection. The connecting rod (107) is fixedly connected to the middle of the bottom surface of the fixing block (105). The bottom end of the connecting rod (107) is fixedly connected to a pressure-resistant glass bottle (108) for holding sulfur hexafluoride.

6. A GIS switch quality inspection device with multi-angle adjustment function according to claim 5, characterized in that: The pressure-resistant glass bottle (108) contains a tin foil sheet (109) for detecting sulfur hexafluoride leakage, and a conduit (111) for transmitting sulfur hexafluoride is fixedly connected to the center of the bottom surface of the pressure-resistant glass bottle (108).

7. A GIS switch quality testing device with multi-angle adjustment function according to claim 6, characterized in that: The end of the conduit (111) away from the pressure-resistant glass bottle (108) is fixedly connected to a quick connector (112) for quick snap-fit, and the pressure-resistant glass bottle (108) is provided with an extraction device.

8. A GIS switch quality inspection device with multi-angle adjustment function according to claim 7, characterized in that: The extraction device includes a quick-connect interface (113) for quick engagement, which is fixedly connected to the side wall of the pressure-resistant glass bottle (108) and connected to the pressure-resistant glass bottle (108).

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