Electrical equipment partial discharge detection device convenient to fix

Abstract

The utility model provides an electrical equipment partial discharge detection device convenient to fix, which comprises a detection terminal and a movable detection probe, the detection probe is electrically connected with the detection terminal through a lead and is used for detecting electrical equipment, the detection probe is provided with an adsorption device which can be adsorbed on the shell of the electrical equipment, and the adsorption device is connected with the detection terminal. The adsorption device comprises an annular base and a suction cup, the annular base is arranged on the outer side of the detection end of the detection probe in a sleeving mode, the suction cup is arranged on the end face of the side, facing the detection direction of the detection probe, of the annular base and surrounds the periphery of the detection end of the detection probe, and the adsorption direction of the suction cup is consistent with the detection direction of the detection probe; during detection, the suction cup can be adsorbed on the surface of the electrical equipment shell, the detection probe is fixed through the suction cup, relative displacement of the detection probe and a detection point in the detection process is avoided, the working stability of the detection probe can be guaranteed, and the detection efficiency and accuracy of the detection probe are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment discharge detection devices, in particular to a conveniently fixed electrical equipment partial discharge detection device. Background Art

[0002] During operation, electrical equipment is prone to partial discharge due to various factors, such as dielectric aging, temperature rise, voltage fluctuation, etc. Partial discharge of electrical equipment will cause local high temperature and excessive local electric field strength inside the equipment, leading to further aging of the dielectric and equipment failure. In severe cases, it can cause accidents such as fire and explosion. Partial discharge detection of electrical equipment is one of the important technologies in the power industry. It aims to promptly discover and solve problems in the equipment and avoid possible equipment failures and accidents. Therefore, real-time detection of partial discharge in electrical equipment is of great significance.

[0003] In recent years, with the rapid development of power electronics technology, partial discharge detection methods based on non-contact detection have gradually been widely used. Non-contact detection methods usually use non-contact technologies such as electromagnetic waves or infrared rays, which can achieve real-time monitoring and high-precision positioning. For example, China Patent Publication No. CN213398797U discloses an ultrasonic partial discharge detection rod, in which a probe fixing device and a probe are arranged at the upper end of the insulating rod. The tester presses the probe on the equipment housing through the insulating rod for testing. For another example, China Patent Publication No. CN216526141U discloses a GIS electrical equipment partial discharge detection device, in which the staff contacts the shell of the GIS electrical equipment with a handheld ultrasonic detection probe to detect the GIS electrical equipment. However, the above detection devices have the following technical problems in actual use: Since the probe and the shell of the electrical equipment are detected in a contact or overlapped manner, the staff's arms are prone to soreness, looseness or shaking during the long-term holding of the insulating rod or the detection probe for detection, which will cause the stability of the probe to deteriorate, and the detection position of the probe is prone to shift. The displacement of the detection position will lead to reduced detection efficiency and accuracy. Utility Model Content

[0004] In view of this, it is necessary to provide a convenient and fixed partial discharge detection device for electrical equipment, which can stably adsorb the probe on the housing of the electrical equipment, avoid the position of the detection probe from shifting during detection, and ensure the stability of the detection probe during operation.

[0005] A convenient and fixed partial discharge detection device for electrical equipment comprises a detection terminal and a movable detection probe, the detection probe is electrically connected to the detection terminal through a wire and is used for detecting the electrical equipment, the detection probe is provided with an adsorption device capable of being adsorbed on the housing of the electrical equipment, the adsorption device comprises an annular base and a suction cup, the annular base is sleeved on the outside of the detection end of the detection probe, the suction cup is arranged on the end face of the annular base on the side facing the detection direction of the detection probe and surrounds the detection end of the detection probe, and the adsorption direction of the suction cup is consistent with the detection direction of the detection probe.

[0006] Preferably, the suction cup is a circular ring structure and is coaxially arranged with the annular base.

[0007] Preferably, the suction cups are trumpet-shaped structures, and there are three or four of them, which are arranged along the circumference of the annular base and distributed around the detection end of the detection probe.

[0008] Preferably, a pressure regulating device is provided on the back of the suction cup, and the pressure regulating device can relieve pressure or exhaust air in the suction chamber of the suction cup to adjust the suction force of the suction cup.

[0009] Preferably, the pressure regulating device includes a connecting tube, a sealing plug, a pull rod and a spring, one end of the connecting tube is fixedly connected to the back of the suction cup, the other end of the connecting tube passes through the annular base and is fixedly connected to the annular base, and the end of the connecting tube passing through the annular base is communicated with the adsorption chamber of the suction cup, a support seat is arranged in the connecting tube, one end of the pull rod is exposed at the end of the connecting tube passing through the annular base, the other end extends along the connecting tube toward the suction cup and passes through the support seat, and the pull rod can freely retract and retract along the support seat toward the suction cup, the sealing plug is fixedly arranged on the pull rod and is located at the end of the connecting tube passing through the annular base, the spring is sleeved on one end of the pull rod passing through the support seat, one end of the spring abuts against the end of the pull rod passing through one end of the support seat, and the other end abuts against the support seat, the tension of the spring is used to push the pull rod in the direction of the suction cup, so that the sealing plug arranged on the pull rod is in close contact with the end of the connecting tube to close the end of the connecting tube, and the sealing plug can be driven to separate from the end of the connecting tube by pulling the pull rod outward to relieve the pressure in the adsorption chamber of the suction cup.

[0010] Preferably, the pressure regulating device includes a connecting tube, a piston, a spiral rod and a rotating handle, one end of the connecting tube is fixedly connected to the back of the suction cup, the other end of the connecting tube passes through the annular base and is fixedly connected to the annular base, and the inner cavity of the connecting tube is communicated with the adsorption cavity of the suction cup, the piston is arranged in the inner cavity of the connecting tube and is in airtight contact with the side wall of the inner cavity of the connecting tube, one end of the spiral rod is rotatably connected to the piston, and the other end passes through one end of the connecting tube away from the suction cup, and is threadedly connected to the end of the connecting tube, and the rotating handle is arranged at the end of the spiral rod passing through the connecting tube, and the spiral rod is driven to rotate by rotating the rotating handle, so as to push the piston to reciprocate along the inner cavity of the connecting tube to suck or relieve the pressure of the adsorption cavity of the suction cup.

[0011] Preferably, the end surface of the annular base facing the detection direction is provided with adjustment grooves corresponding to the number of suction cups, the adjustment grooves are evenly spaced along the circumferential direction of the annular base, and the adjustment grooves pass through the end surfaces on both sides of the annular base, the connecting tube is arranged on the adjustment groove, and can slide along the opening direction of the adjustment groove to adjust the position of the suction cup.

[0012] Preferably, a fixing ring and an adjusting nut are provided on the outer side wall of the connecting tube. The fixing ring is fixedly connected to the connecting tube and blocks one side of the adjusting groove. The adjusting nut is provided on the other side of the adjusting groove and is threadably connected to the connecting tube. By rotating the adjusting nut for relative movement in the direction of the fixing ring, the connecting tube can be clamped on the adjusting groove to limit the connecting tube.

[0013] It can be seen from the above technical scheme that the present application provides a convenient and fixed partial discharge detection device for electrical equipment, including a detection terminal and a movable detection probe, the detection probe is electrically connected to the detection terminal through a wire, and the detection probe is provided with an adsorption device that can be adsorbed on the casing of the electrical equipment, the adsorption device includes an annular base and a suction cup, the annular base is sleeved on the outside of the detection end of the detection probe, the suction cup is arranged on the end face of the annular base facing the detection direction of the detection probe, and surrounds the detection end of the detection probe, and the adsorption direction of the suction cup is consistent with the detection direction of the detection probe. When performing detection, the suction cup can be adsorbed on the surface of the casing of the electrical equipment, and the detection probe is fixed by the suction cup to avoid relative displacement of the detection probe and the detection point during the detection process, which can ensure the stability of the detection probe during operation and improve the detection efficiency and accuracy of the detection probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the detection probe.

[0016] Figure 3 It is a schematic structural diagram of the adsorption device.

[0017] Figure 4 It is a cross-sectional schematic diagram of the voltage regulating device.

[0018] Figure 5 It is a schematic diagram of the structure of a detection probe in a preferred embodiment.

[0019] Figure 6 It is a schematic diagram of the structure of an adsorption device in a preferred embodiment.

[0020] Figure 7 It is a cross-sectional schematic diagram of a voltage regulating device in a preferred embodiment.

[0021] In the figure: detection terminal 1, detection probe 2, wire 3, adsorption device 4, annular base 41, suction cup 42, pressure regulating device 43, adjustment groove 44, connecting tube 431, sealing plug 432, pull rod 433, spring 434, piston 435, screw rod 436, rotating handle 437, fixing ring 438, adjusting nut 439, support seat 440. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Please see Figure 1The embodiment of the utility model provides a convenient and fixed electrical equipment partial discharge detection device, including a detection terminal 1 and a movable detection probe 2. The detection probe 2 is electrically connected to the detection terminal 1 through a wire 3. The detection terminal 1 is a device for partial discharge detection. The detection probe 2 is a handheld instrument based on ground wave, ultrasonic wave, and high-frequency current detection, which is used to detect the partial discharge of electrical equipment. The partial discharge amplitude and spectrum waveform are read by the detection terminal 1 to determine the location where the partial discharge occurs in the electrical equipment. The specific detection principle and process are well-known technologies and will not be repeated here. By arranging an adsorption device 4 capable of being adsorbed on the housing of the electrical equipment on the detection probe 2, the adsorption device 4 includes an annular base 41 and a suction cup 42, the annular base 41 is sleeved on the outside of the detection end of the detection probe 2, the suction cup 42 is arranged on the end face of the annular base 41 facing the detection direction of the detection probe 2, and surrounds the detection end of the detection probe 2, and the adsorption direction of the suction cup 42 is consistent with the detection direction of the detection probe 2. When performing detection, the detection probe 2 is held by hand to face the detection point on the housing of the electrical equipment and pressed in the direction of the housing of the electrical equipment to make the suction cup 42 adsorbed on the housing of the electrical equipment, and the detection probe 2 is fixed by the suction cup 42 to prevent the detection probe 2 from being relatively displaced from the detection point during the detection process.

[0024] Please see Figure 1 and Figure 2 In this embodiment, the suction cup 42 can be a circular ring structure, coaxially arranged with the annular base 41, surrounding the detection end of the detection probe 2, and the detection probe 2 is located at the center of the suction cup 42 of the circular ring structure. It can also be a trumpet-shaped suction cup 42, the number of which is three or four, arranged along the circumference of the annular base 41 and distributed around the detection end of the detection probe 2. Both can play a role in fixed adsorption.

[0025] Please see Figure 3 and Figure 4Furthermore, the adsorption device 4 also includes a pressure regulating device 43, which is arranged on the back of the suction cup 42. The pressure regulating device 43 can relieve pressure or exhaust air in the adsorption chamber of the suction cup 42 to adjust the adsorption force of the suction cup 42. Specifically, the pressure regulating device 43 includes a sealing plug 432, a pull rod 433, a spring 434 and a connecting tube 431 with two ends connected. One end of the connecting tube 431 is fixedly connected to the back of the suction cup 42, and the other end of the connecting tube 431 passes through the annular base 41 and is fixedly connected to the annular base 41. The end of the connecting tube 431 that passes through the annular base 41 is connected to the adsorption chamber of the suction cup 42, so that the adsorption chamber of the suction cup 42 is connected to the outside. A support seat 440 is arranged in the connecting tube 431, and the pull rod 43 One end of the pull rod 433 is exposed at the end of the connecting tube 431 passing through the annular base 41, and the exposed end is used as an operating handle. The other end of the pull rod 433 extends along the connecting tube 431 toward the suction cup 42 and passes through the support seat 440, and the pull rod 433 can freely extend and retract along the support seat 440 toward the suction cup 42. The sealing plug 432 is fixedly arranged on the pull rod 433 and is located at the end of the connecting tube 431 passing through the annular base 41. The spring 434 is sleeved on the end of the pull rod 433 passing through the support seat 440. One end of the spring 434 The end of the pull rod 433 passes through one end of the support seat 440, and the other end rests on the support seat 440. The tension generated by the compression of the spring 434 is used to push the pull rod 433 toward the direction of the suction cup 42, so that the sealing plug 432 set on the pull rod 433 is in close contact with the end of the connecting tube 431, so as to seal the end of the connecting tube 431 and prevent the inner cavity of the connecting tube 431 from communicating with the outside world. When performing specific inspections, when the handheld inspection probe 2 is pressed toward the housing of the electrical equipment, the air in the suction cup 42 is squeezed and the air is released. The pressure will push the sealing plug 432 to separate from the connecting tube 431, so as to exhaust and release the pressure. After the pressure is released, the sealing plug 432 will be reset under the tension of the spring 434 and will be sealed with the connecting tube 431 again. At this time, the suction cup 42 will be firmly adsorbed on the housing of the electrical equipment. When the detection is completed, the pull rod 433 is manually pulled outward to separate the sealing plug 432 from the end of the connecting tube 431, and the pressure of the adsorption cavity of the suction cup 42 is released to separate the suction cup 42 from the housing of the electrical equipment, so as to facilitate the removal of the detection probe 2. The beneficial effects of using the pressure regulating device 43 are: the suction cup 42 can be quickly depressurized, which is convenient for disassembly of the handheld probe, easy to use, and can improve the detection efficiency.

[0026] Please see Figures 5 to 7In another preferred embodiment, the pressure regulating device 43 adopts a suction cylinder structure, which is used to relieve pressure or suction the adsorption chamber of the suction cup 42 to adjust the adsorption force of the suction cup 42. Specifically, the pressure regulating device 43 is arranged on the back of the suction cup 42, and the pressure regulating device 43 includes a connecting cylinder 431, a piston 435, a screw rod 436 and a rotating handle 437. One end of the connecting cylinder 431 is fixedly connected to the back of the suction cup 42, and the other end of the connecting cylinder 431 passes through the annular base 41 and is fixedly connected to the annular base 41, and the inner cavity of the connecting cylinder 431 is connected to the adsorption chamber of the suction cup 42. The piston 435 is made of rubber and is arranged in the inner cavity of the connecting cylinder 431. The piston 435 is connected to the connecting cylinder 431. The side wall of the inner cavity 431 is an interference fit, so that a closed state is formed between the inner cavity of the connecting tube 431 and the suction cup 42. One end of the screw rod 436 is rotatably connected to the piston 435, and the other end passes through the end of the connecting tube 431 away from the suction cup 42, and is threadedly connected to the end of the connecting tube 431. The rotating handle 437 is arranged at the end of the screw rod 436 passing through the connecting tube 431. By rotating the screw rod 436, the piston 435 is driven to move, so that the adsorption chamber of the suction cup 42 can be negatively sucked or depressurized to adjust the adsorption force of the suction cup 42. Specifically, when performing the inspection, the handheld inspection probe 2 is pressed toward the housing of the electrical equipment so that the suction cup 42 is adsorbed on the housing of the electrical equipment. At this time, the rotating handle 437 is manually turned to rotate the spiral rod 436 in the direction away from the suction cup 42 to drive the piston 435 away from the suction cup 42, thereby forming a negative pressure suction on the adsorption chamber of the suction cup 42, so that the internal air pressure of the suction cup 42 is reduced, thereby increasing the adsorption force of the suction cup 42, so that the suction cup 42 is tightly adsorbed on the surface of the housing of the electrical equipment. When the inspection is completed, the spiral rod 436 can be manually rotated toward the suction cup 42 to drive the piston 435 toward the suction cup 42, and the adsorption chamber of the suction cup 42 is depressurized, so that the suction cup 42 is separated from the housing of the electrical equipment, so as to facilitate the removal of the inspection probe 2.

[0027] In this embodiment, the pressure regulating device 43 with a suction cylinder structure uses the screw rod 436 to push the piston 435 to move during the detection, which can perform negative pressure suction on the suction cup 42, increase the adsorption force of the suction cup 42, and avoid the suction cup 42 being separated from the electrical equipment casing due to insufficient adsorption force during the detection process. The stability of the detection probe 2 during the detection process is improved, and after the detection is completed, the piston 435 can be pushed by the screw rod 436 to conveniently relieve the pressure on the suction cup 42, so as to facilitate the disassembly of the detection probe 2. It is easy to use and can improve the detection efficiency.

[0028] Please see Figure 6In the above two embodiments, when the suction cup 42 is a trumpet-shaped structure, the number is three or four, and it is arranged along the circumference of the annular base 41, in order to enable the suction cup 42 to adjust its position along the annular base 41 so that the suction cup 42 can better fit the housing of the electrical equipment when it is adsorbed, this solution is provided with adjustment grooves 44 corresponding to the number of suction cups 42 on the end surface of the annular base 41 facing the detection direction, the adjustment grooves 44 are evenly spaced along the circumferential direction of the annular base 41, and the adjustment grooves 44 pass through the end surfaces on both sides of the annular base 41, the connecting tube 431 is arranged on the adjustment groove 44, and can slide along the opening direction of the adjustment groove 44, and a coaxial fixing ring 438 and an adjustment ring are provided on the outer wall of the connecting tube 431. The adjusting nut 439 and the fixing ring 438 are fixedly connected to the connecting tube 431 and blocked on the end face of one side of the adjusting groove 44. The adjusting nut 439 is arranged on the other side of the adjusting groove 44. The adjusting nut 439 and the connecting tube 431 are connected by threaded cooperation and form a relative clamping state with the fixing ring 438 to clamp the connecting tube 431 on the adjusting groove 44. When adjusting the position of one of the suction cups 42, the adjusting nut 439 on the connecting tube 431 corresponding to the suction cup 42 is manually rotated to loosen it, and then the position of the connecting tube 431 on the adjusting groove 44 is manually adjusted. After the adjustment is completed, the adjusting nut 439 is manually rotated to clamp the connecting tube 431 on the adjusting groove 44 again to lock the connecting tube 431.

[0029] The working principle of the utility model is as follows: when conducting detection, the detection probe 2 is held and pressed toward the housing of the electrical equipment so that the suction cup 42 is adsorbed on the surface of the housing of the electrical equipment to fix the detection probe 2. The detection is carried out through the detection probe 2, and the detected data is transmitted to the inside of the detection terminal 1 through the wire 3. The data is checked through the detection terminal 1 to avoid relative displacement between the detection probe 2 and the detection point during detection, thereby ensuring the stability of the detection probe 2 during operation and improving the detection efficiency and accuracy of the detection probe 2.

[0030] The above disclosure is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A convenient and fixed partial discharge detection device for electrical equipment, comprising a detection terminal and a movable detection probe, the detection probe being electrically connected to the detection terminal through a wire, and used for detecting electrical equipment, characterized in that: The detection probe is provided with an adsorption device that can be adsorbed on the casing of the electrical equipment, and the adsorption device includes an annular base and a suction cup. The annular base is sleeved on the outside of the detection end of the detection probe, and the suction cup is arranged on the end surface of the annular base facing the detection direction of the detection probe and surrounds the detection end of the detection probe, and the adsorption direction of the suction cup is consistent with the detection direction of the detection probe.

2. The conveniently fixed electrical equipment partial discharge detection device as claimed in claim 1, characterized in that: The suction cup is a circular ring structure and is coaxially arranged with the ring base.

3. The conveniently fixed electrical equipment partial discharge detection device as claimed in claim 1, characterized in that: The suction cups are trumpet-shaped structures, and there are three or four of them, which are arranged along the circumference of the annular base and distributed around the detection end of the detection probe.

4. The conveniently fixed electrical equipment partial discharge detection device as claimed in claim 2 or 3, characterized in that: A pressure regulating device is arranged on the back of the suction cup, and the pressure regulating device can relieve pressure or exhaust air in the suction chamber of the suction cup to adjust the suction force of the suction cup.

5. The conveniently fixed electrical equipment partial discharge detection device as claimed in claim 4, characterized in that: The pressure regulating device includes a connecting tube, a sealing plug, a pull rod and a spring, one end of the connecting tube is fixedly connected to the back of the suction cup, the other end of the connecting tube passes through the annular base and is fixedly connected to the annular base, and the end of the connecting tube passing through the annular base is communicated with the adsorption chamber of the suction cup, a support seat is arranged in the connecting tube, one end of the pull rod is exposed at the end of the connecting tube passing through the annular base, and the other end extends along the connecting tube toward the suction cup and passes through the support seat, and the pull rod can freely extend and retract along the support seat toward the suction cup, the sealing plug is fixedly arranged on the pull rod and is located at the end of the connecting tube passing through the annular base, the spring is sleeved on one end of the pull rod passing through the support seat, one end of the spring abuts against the end of the pull rod passing through one end of the support seat, and the other end abuts against the support seat, and the tension of the spring is used to push the pull rod in the direction of the suction cup, so that the sealing plug arranged on the pull rod is in close contact with the end of the connecting tube to close the end of the connecting tube, and by pulling the pull rod outward, the sealing plug can be driven to separate from the end of the connecting tube to relieve the pressure in the adsorption chamber of the suction cup.

6. The conveniently fixed electrical equipment partial discharge detection device as claimed in claim 4, characterized in that: The pressure regulating device includes a connecting tube, a piston, a spiral rod and a rotating handle, one end of the connecting tube is fixedly connected to the back of the suction cup, the other end of the connecting tube passes through the annular base and is fixedly connected to the annular base, and the inner cavity of the connecting tube is communicated with the adsorption cavity of the suction cup, the piston is arranged in the inner cavity of the connecting tube and is in airtight contact with the side wall of the inner cavity of the connecting tube, one end of the spiral rod is rotatably connected to the piston, and the other end passes through one end of the connecting tube away from the suction cup, and is threadedly connected to the end of the connecting tube, the rotating handle is arranged at the end of the spiral rod passing through the connecting tube, and the spiral rod is driven to rotate by rotating the rotating handle, so as to push the piston to reciprocate along the inner cavity of the connecting tube to suck or relieve the pressure of the adsorption cavity of the suction cup.

7. The conveniently fixed electrical equipment partial discharge detection device as claimed in claim 6, characterized in that: The end surface of the annular base facing the detection direction is provided with adjustment grooves corresponding to the number of suction cups. The adjustment grooves are evenly spaced along the circumferential direction of the annular base, and the adjustment grooves pass through the end surfaces on both sides of the annular base. The connecting tube is arranged on the adjustment groove and can slide along the opening direction of the adjustment groove to adjust the position of the suction cup.

8. The conveniently fixed electrical equipment partial discharge detection device as claimed in claim 7, characterized in that: A fixing ring and an adjusting nut are provided on the outer side wall of the connecting tube. The fixing ring is fixedly connected to the connecting tube and blocks one side of the adjusting groove. The adjusting nut is provided on the other side of the adjusting groove and is threadably connected to the connecting tube. By rotating the adjusting nut for relative movement in the direction of the fixing ring, the connecting tube can be clamped on the adjusting groove to limit the position of the connecting tube.

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