A partial discharge detection device

Abstract

The utility model discloses a partial discharge detection equipment relates to substation inspection technical field, including handheld type inspection appearance, one end of handheld type inspection appearance is firmly connected with the connecting cable, one end of connecting cable is firmly connected with the test probe, the outside fixed joint of test probe is limit shell no.

Description

Technical Field

[0001] This utility model relates to the field of substation inspection technology, specifically to a partial discharge detection device. Background Technology

[0002] Live-line testing technology for switchgear has gradually developed against the backdrop of increasingly stringent requirements for power supply reliability in power systems. Traditional power outage testing methods suffer from long cycles and intervals, making it difficult to detect latent defects in a timely manner. This has led to live-line testing becoming an important means of ensuring the safe operation of equipment. Partial discharge is an early sign of insulation degradation in switchgear. Live-line testing can capture these weak signals while the equipment is in operation, enabling fault early warning. In practical applications, testing personnel use handheld equipment to scan at a constant speed along switchgear gaps, observation windows, cable compartments, and other areas. They listen to the discharge sound through headphones and observe amplitude changes on the screen. Once an anomaly is detected, the source of the discharge can be repeatedly confirmed and located.

[0003] In practical field applications, handheld partial discharge testers have certain limitations. 35kV switchgear is generally over 2.2m high, and the detection points on the busbar compartment and rear upper wall of 10kV switchgear are usually about 2.5m above the ground. However, the standard straight-grip sensor provided by the manufacturer is generally no more than 25cm long, requiring external support tools, which is inconvenient. Furthermore, the instability of the hand holding the probe also affects the detection results. Utility Model Content

[0004] The purpose of this invention is to provide a partial discharge detection device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides a partial discharge detection device, comprising:

[0006] A handheld inspection device, wherein a connecting cable is fixedly connected to one end of the handheld inspection device, and a test probe is fixedly connected to the other end of the connecting cable. Limiting shell one and limiting shell two are fixedly snapped to the outside of the test probe. There are two Y-shaped shells on the outer wall of limiting shell one, and a grip tube is slidably connected to the outside of limiting shell two.

[0007] Furthermore, auxiliary rollers are rotatably connected to both ends of the Y-shaped shell.

[0008] Furthermore, a positioning hole is provided on the outer wall of the test probe, and a docking rod is fixedly connected to the inner wall of the limiting shell, the docking rod being able to be movably engaged with the positioning hole.

[0009] Furthermore, a fixing plate is slidably connected to the top of the first limiting shell, and two insert rods are fixedly connected to the bottom of the fixing plate. Two insertion holes are opened at the top of the second limiting shell, and the insert rods can be movably engaged with the adjacent insertion holes.

[0010] Furthermore, a sliding rod is slidably connected to the top of the limiting shell, and a spring is fixedly connected between the bottom end of the sliding rod and the limiting shell. The top end of the sliding rod passes through the limiting shell and is fixedly connected to the fixing piece.

[0011] Furthermore, a connecting rod is slidably connected inside the grip cylinder, and a C-shaped frame is fixedly connected to the top end of the connecting rod. The C-shaped frame is fixedly connected to an outer wall of the limiting shell.

[0012] Furthermore, multiple limiting holes are equidistantly provided on the outer wall of the connecting rod, and a locking rod is slidably connected to the outer wall of the grip cylinder. A spring is fixedly connected between the locking rod and the grip cylinder. One end of the locking rod passes through and extends into the interior of the grip cylinder, and the grip cylinder can be movably engaged with the adjacent limiting holes.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] Depending on the scanning and detection position, the probe can be pulled out of the limiting hole by pulling the lever. Then, the U-shaped frame can be lifted to raise the entire test probe. The lever can be locked into the appropriate limiting hole as needed to limit the exposed length of the connecting rod. Then, the end of the grip can be held to deploy and use the test probe, which facilitates scanning and detection of higher positions on the high-voltage switchgear, making the detection operation more convenient and labor-saving. The Y-shaped shell provides support, making the grip more stable and the detection more accurate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the test probe structure in this utility model;

[0017] Figure 3 This is a schematic diagram of the side section structure of the grip tube in this utility model;

[0018] Figure 4 This is a side cross-sectional view of the limiting shell in this utility model;

[0019] Figure 5 In this utility model Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0020] In the diagram: 10. Handheld inspection device; 11. Connecting cable; 12. Test probe; 121. Positioning hole; 13. Limiting shell one; 131. Slide rod; 132. Spring one; 133. Fixing plate; 134. Insert rod; 135. Y-shaped shell; 136. Auxiliary roller; 14. Limiting shell two; 141. Grip cylinder; 142. Connecting rod; 143. Limiting hole; 144. Locking rod; 145. Spring two; 146. C-shaped frame; 147. Connecting rod; 148. Insertion hole. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-5 This utility model provides a technical solution: a partial discharge detection device, including a handheld inspection instrument 10, one end of which is fixedly connected to a connecting cable 11, and one end of the connecting cable 11 is fixedly connected to a test probe 12. The test probe 12 is externally fixedly snapped with a limiting shell 13 and a limiting shell 2 14. The outer wall of the limiting shell 13 has two Y-shaped shells 135, and the outer side of the limiting shell 2 14 is slidably connected to a grip 141.

[0023] In practice, firstly, limit shell 13 and limit shell 2 14 are snapped onto the outside of the test probe 12. The docking rod 147 on limit shell 2 14 is aligned with the positioning hole 121 and snapped in. First, limit shell 2 14 is docked with the test probe 12. Then, the fixing plate 133 is lifted and limit shell 13 and limit shell 2 14 are brought together. After the fixing plate 133 is released, under the reset action of spring 132, the two insertion rods 134 move down and are snapped into the insertion hole 148, thereby quickly snapping limit shell 13 and limit shell 2 14 onto the outside of the test probe 12 for deployment.

[0024] Based on the scanning height, the connecting rod 142 is pulled out from the inside of the gripping cylinder 141 to a suitable length. Then, the test probe 12 is deployed at a suitable height for detection by holding the gripping cylinder 141. During the process, the Y-shaped shell 135 provides support, which effectively solves this problem. Furthermore, the auxiliary roller 136 avoids sliding friction, making the movement smoother and the scanning detection more stable.

[0025] See Figure 2 Both ends of the Y-shaped shell 135 are rotatably connected to auxiliary rollers 136.

[0026] In practical implementation, when using the handheld test probe 12 for testing, the two Y-shaped shells 135 facilitate contact between the probe 12 and the high-voltage switchgear, ensuring a safer testing process. This also makes the testing end of the probe 12 more stable during movement. When using this handheld device to test the switchgear, the probe's stability directly affects the repeatability and accuracy of the data. Hand shaking causes pulse moments to "jitter" for several milliseconds, equivalent to phase noise, resulting in a wider scattering of the spectrum. The originally clear "rabbit ear" shaped corona map becomes a blurry mess, making automatic identification impossible. The Y-shaped shells 135 effectively solve this problem, and the auxiliary rollers 136 prevent sliding friction, making movement smoother.

[0027] See Figure 1-5 The outer wall of the test probe 12 is provided with a positioning hole 121, and the inner wall of the limiting shell 14 is fixedly connected with a docking rod 147, which can be movably engaged with the positioning hole 121.

[0028] The top of the limiting shell 13 is slidably connected to a fixing piece 133, and the bottom of the fixing piece 133 is fixedly connected to two insert rods 134. The top of the limiting shell 14 has two insertion holes 148, and the insert rods 134 can be movably engaged with the adjacent insertion holes 148.

[0029] A sliding rod 131 is slidably connected to the top of the limiting shell 13. A spring 132 is fixedly connected between the bottom end of the sliding rod 131 and the limiting shell 13. The top end of the sliding rod 131 passes through the limiting shell 13 and is fixedly connected to the fixing piece 133.

[0030] In practical implementation, when scanning switch cabinets with a handheld partial discharge instrument (ultrasonic / TEV), different testing environments will be encountered. For example, some scanning and testing positions need to be high, and it is difficult to place the probe section of the test probe 12 in the designated position with only one hand support, making the testing difficult. External tools are required. The docking rod 147 on the limiting shell 2 14 is aligned with the positioning hole 121 and inserted. First, the limiting shell 2 14 is docked with the test probe 12. Then, the fixing plate 133 is lifted, and the limiting shell 1 13 is brought into contact with the limiting shell 2 14. After the fixing plate 133 is released, under the reset action of the spring 1 132, the two insertion rods 134 move down and are inserted into the insertion hole 148, thereby quickly snapping the limiting shell 1 13 and the limiting shell 2 14 onto the outside of the test probe 12 for deployment. This makes the assembly and disassembly of the limiting shell 1 13 and the limiting shell 2 14 more convenient, so that they can be adapted for use as needed.

[0031] See Figure 3-4 A connecting rod 142 is slidably connected inside the grip 141, and a shaped frame 146 is fixedly connected to the top of the connecting rod 142. The shaped frame 146 is fixedly connected to the outer wall of the limiting shell 13.

[0032] Multiple limiting holes 143 are equidistantly provided on the outer wall of the connecting rod 142. A locking rod 144 is slidably connected to the outer wall of the grip cylinder 141. A spring 145 is fixed between the locking rod 144 and the grip cylinder 141. One end of the locking rod 144 passes through and extends into the interior of the grip cylinder 141. The grip cylinder 141 can be movably engaged with the adjacent limiting holes 143.

[0033] In practice, after the limiting shell 13 and the limiting shell 2 14 are engaged with the test probe 12, the probe is pulled out of the limiting hole 143 by pulling the locking rod 144. Then, the U-shaped frame 146 can be lifted to raise the test probe 12 as a whole. As needed, the locking rod 144 is locked into the appropriate limiting hole 143 to limit the exposed length of the connecting rod 142. Then, the end of the gripping cylinder 141 is held to deploy and use the test probe 12, which facilitates scanning and testing at higher positions on the high-voltage switchgear, making the testing operation more convenient and labor-saving.

[0034] Working Principle: When scanning switchgear with a handheld partial discharge instrument (ultrasonic / TEV), different testing environments may be encountered. For example, some scanning and testing positions need to be high, and it is difficult to place the probe section of the test probe 12 in the designated position with only one hand, making the testing difficult. External tools are required. The mating rod 147 on the limiting shell 14 is aligned with the positioning hole 121 and inserted. First, the limiting shell 14 is aligned with the test probe 12. Then, the fixing plate 133 is lifted, and the limiting shell 13 is brought into contact with the limiting shell 14. After the fixing plate 133 is released, under the reset action of the spring 132, the two insertion rods 134 move down and are inserted into the insertion hole 148, thereby connecting the limiting shell 13 and the limiting probe 14. The second shell 14 is quickly snapped onto the outside of the test probe 12 for deployment, making it easy to assemble and disassemble the first limiting shell 13 and the second limiting shell 14 as a whole. This allows for adaptation and use as needed. After the first limiting shell 13 and the second limiting shell 14 are snapped onto the test probe 12, the locking rod 144 is pulled out from the limiting hole 143. Then, the U-shaped frame 146 can be lifted to raise the test probe 12 as a whole. As needed, the locking rod 144 is snapped into the appropriate limiting hole 143 to limit the exposed length of the connecting rod 142. Then, the end of the gripping cylinder 141 is held to deploy and use the test probe 12, which facilitates scanning and testing at higher positions on the high-voltage switchgear, making the testing operation more convenient and labor-saving.

[0035] 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 description and drawings of this utility model, 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 partial discharge detection device, comprising, A handheld inspection device (10), one end of which is fixedly connected to a connecting cable (11), and one end of the connecting cable (11) is fixedly connected to a test probe (12), characterized in that, The test probe (12) is externally fixedly connected to a first limiting shell (13) and a second limiting shell (14). The outer wall of the first limiting shell (13) has two Y-shaped shells (135), and the outer side of the second limiting shell (14) is slidably connected to a grip (141).

2. The partial discharge detection device as described in claim 1, characterized in that: Both ends of the Y-shaped shell (135) are rotatably connected to auxiliary rollers (136).

3. The partial discharge detection device as described in claim 1, characterized in that: The outer wall of the test probe (12) is provided with a positioning hole (121), and the inner wall of the limiting shell (14) is fixedly connected with a docking rod (147), which can be movably engaged with the positioning hole (121).

4. The partial discharge detection device as described in claim 3, characterized in that: The top of the first limiting shell (13) is slidably connected to a fixing piece (133), and the bottom of the fixing piece (133) is fixedly connected to two insert rods (134). The top of the second limiting shell (14) has two insertion holes (148), and the insert rods (134) can be movably engaged with the adjacent insertion holes (148).

5. A partial discharge detection device as claimed in claim 4, characterised in that: The top end of the limiting shell (13) is slidably connected to a slide rod (131), and the bottom end of the slide rod (131) is fixedly connected to the limiting shell (13) by a spring (132). The top end of the slide rod (131) passes through the limiting shell (13) and is fixedly connected to a fixing piece (133).

6. A partial discharge detection device as claimed in claim 1, characterized in that: The grip (141) is slidably connected to a connecting rod (142), and a shaped frame (146) is fixedly connected to the top of the connecting rod (142). The shaped frame (146) is fixedly connected to the outer wall of the limiting shell (13).

7. The partial discharge detection device as described in claim 6, characterized in that: The outer wall of the connecting rod (142) is provided with a plurality of limiting holes (143) at equal intervals. The outer wall of the grip (141) is slidably connected with a locking rod (144). A spring (145) is fixedly connected between the locking rod (144) and the grip (141). One end of the locking rod (144) passes through and extends into the inside of the grip (141). The grip (141) can be movably engaged with the adjacent limiting holes (143).

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