A transformer shell insulation detector

Abstract

The utility model discloses a kind of transformer shell insulation detector, including box and detector body, the detector body is fixedly installed in box interior, the box cover for being set on the box is closed or opened to detector body, the side of the detector body is provided with lead wire, the detection probe connected to the one end of the lead wire is used to adhere on transformer shell, the beneficial effects of the utility model are that detector body can be placed into box to store, box is made of metal and can shield detector body, the lead wire connected on detector body is set, the other end of the lead wire is installed on auxiliary mechanism by the outer insulation sleeve of sleeve connection, auxiliary mechanism can be fixed on transformer shell, and the detection probe connected to the one end of the lead wire can adhere on the surface of transformer to detect, structure is reasonable, and it is convenient to detect probe and the stable adhesion of transformer surface to be measured, convenient and fast positioning detection.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a transformer casing insulation tester. Background Technology

[0002] As the core equipment for energy conversion and transmission in the power system, the insulation performance of transformers directly determines the safety and reliability of power grid operation. According to the "Standard for Acceptance Testing of Electrical Equipment" (GB 50150-06) and industry practice, transformer insulation failure is the primary cause of equipment failure, with casing insulation defects accounting for up to 32%. Therefore, it is necessary to test the insulation of transformer casings.

[0003] Existing insulation testing devices have certain drawbacks. When testing the insulation of a transformer casing, the probe needs to be connected to the transformer casing via a lead wire and attached to the casing. Currently, the main method is to use a handheld probe attached to the transformer casing for testing. This method is not safe and is not convenient for long-term handheld testing. Therefore, there is an urgent need for a transformer casing insulation tester to solve the above problems. Utility Model Content

[0004] To solve the above problems, this utility model provides a transformer casing insulation tester, which is achieved through the following technical solution.

[0005] A transformer casing insulation tester includes a housing and a tester body. The tester body is fixedly installed inside the housing. A cover on the housing is used to close or open the tester body. A connecting wire is provided on one side of the tester body. A test probe connected to one end of the connecting wire is used to fit against the transformer casing. An outer insulating sleeve is provided on the outer surface of the test probe. The tester body also includes an auxiliary mechanism for positioning and testing the test probe. The auxiliary mechanism includes:

[0006] The fixing frame has a first opening and a second opening;

[0007] Clamping plates, wherein two clamping plates are symmetrically arranged on the fixing frame, and the two clamping plates are used to clamp onto the transformer housing;

[0008] Baffles, wherein two baffles are symmetrically arranged;

[0009] A fixing ring, which is sleeved on the outer insulating sleeve, is used to adjust the detection angle.

[0010] Furthermore, two sliding rods are fixedly connected to the fixing frame, and the clamping plate is slidably connected to the sliding rods.

[0011] Furthermore, a limiting rod is fixedly connected to each of the two clamping plates on opposite sides. One end of the limiting rod movably passes through the baffle, and a first spring is provided at the other end of the limiting rod and fixed between the clamping plate and the baffle.

[0012] Furthermore, a bidirectional screw is rotatably connected to the fixing frame, with its two ends respectively connected to two baffles, and the baffles and the bidirectional screw are threaded together. The threads at both ends of the bidirectional screw are in opposite directions, and a knob fixed on the bidirectional screw is located between the two baffles.

[0013] Furthermore, both the clamping plate and the baffle are movably connected to the slide rod.

[0014] Furthermore, a second spring is fixedly connected to the bottom end of the fixing ring, and a positioning seat is fixedly connected to one end of the second spring. The positioning seat is rotatably connected to the fixing frame through a support rod.

[0015] Furthermore, bolts are provided on both sides of the fixing ring, and the outer insulating sleeve is fixedly connected to the fixing ring by bolts, with one end of the outer insulating sleeve penetrating and engaging with the positioning seat.

[0016] The beneficial effects of this utility model are that the detector body can be placed inside a box for storage. The box is made of metal to shield the detector body. Then, it is connected to the detector body through a set guide wire. The other end of the guide wire is installed on the auxiliary mechanism through a sleeved outer insulating sleeve. Finally, the auxiliary mechanism can be fixed on the transformer shell, and the detection probe connected to one end of the guide wire can be attached to the surface of the transformer for detection. The structure is reasonable, which facilitates the stable attachment of the detection probe to the transformer surface to be tested, and makes it convenient for quick positioning and detection. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a transformer casing insulation tester according to the present invention;

[0019] Figure 2 This is a schematic diagram showing the connection between the guide wire and the fixing frame of this utility model;

[0020] Figure 3 This is a schematic diagram of the interior of the housing of this utility model.

[0021] The attached figures are labeled as follows:

[0022] 1. Box body; 11. Box lid;

[0023] 2. Lead wire; 21. Detection probe; 22. Outer insulating sleeve;

[0024] 3. Fixing bracket; 31. First opening; 32. Second opening; 33. Slide rod; 34. Double-acting screw; 341. Knob;

[0025] 4. The detector itself;

[0026] 5. Clamping plate; 51. Limiting rod; 52. First spring;

[0027] 6. Baffle;

[0028] 7. Fixing ring; 71. Second spring; 72. Positioning seat; 73. Support rod. Detailed Implementation

[0029] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figure 1-3 As shown, the present invention has the following specific embodiments.

[0031] Example 1

[0032] A transformer casing insulation tester includes a housing 1 and a tester body 4. The tester body 4 is fixedly installed inside the housing 1. A cover 11 on the housing 1 is used to close or open the tester body 4. A connecting wire 2 is provided on one side of the tester body 4. A test probe 21 connected to one end of the connecting wire 2 is used to fit against the transformer casing. An outer insulating sleeve 22 is provided on the outer surface of the test probe 21. The tester body 4 also includes an auxiliary mechanism for positioning and testing the test probe 21. The auxiliary mechanism includes:

[0033] The fixing frame 3 has a first opening 31 and a second opening 32.

[0034] Clamping plates 5, two clamping plates 5 are symmetrically arranged on the fixing frame 3, and the two clamping plates 5 are used to clamp onto the transformer shell;

[0035] Baffle 6, two baffles 6 are arranged symmetrically;

[0036] The fixing ring 7 is sleeved on the outer insulating sleeve 22 and is used to adjust the detection angle.

[0037] In this embodiment, as Figure 1 and 3 As shown, firstly, the detector body 4 can be placed inside the housing 1 for storage. The housing 1 is made of metal and can shield the detector body 4. Then, it is connected to the detector body 4 through the set connecting wire 2. The other end of the connecting wire 2 is installed on the auxiliary mechanism through the sleeved outer insulating sleeve 22. Finally, the auxiliary mechanism can be fixed on the transformer shell, and the detection probe 21 connected to one end of the connecting wire 2 can be attached to the surface of the transformer for detection. The structure is reasonable, which makes it easy for the detection probe 21 to be stably attached to the transformer surface to be tested, and facilitates rapid positioning and detection.

[0038] Example 2

[0039] The difference from Embodiment 1 is that the clamping structure of the auxiliary mechanism is also disclosed:

[0040] Two slide rods 33 are fixedly connected to the fixed frame 3, and the clamping plate 5 is slidably connected to the slide rods 33.

[0041] Preferably, a limiting rod 51 is fixedly connected to each of the two clamping plates 5 on opposite sides. One end of the limiting rod 51 is movably inserted through the baffle 6, and a first spring 52 is provided at the other end of the limiting rod 51 and fixed between the clamping plate 5 and the baffle 6.

[0042] Preferably, a bidirectional screw 34 is rotatably connected to the fixing frame 3. The two ends of the bidirectional screw 34 are respectively connected to two baffles 6, and the baffles 6 are threadedly engaged with the bidirectional screw 34. The thread directions at the two ends of the bidirectional screw 34 are opposite, and the knob 341 fixed on the bidirectional screw 34 is located between the two baffles 6.

[0043] Preferably, both the clamping plate 5 and the baffle 6 are movably connected to the slide rod 33.

[0044] In this embodiment, as Figure 2 As shown, rotating the knob 341 can drive the bidirectional screw 34 to rotate, and the bidirectional screw 34 can drive the threaded baffle 6 to move on the slide bar 33. The displaced baffle 6 is pressed against the clamping plate 5 by the first spring 52. Since the threads at both ends of the bidirectional screw 34 are opposite, the two clamping plates 5 can be driven to move in opposite directions, which makes it easier for the fixing frame 3 to be positioned and clamped on the transformer shell.

[0045] Example 3

[0046] The difference from Embodiment 2 is that an adjustment structure on the auxiliary mechanism is also disclosed:

[0047] The bottom end of the fixed ring 7 is fixedly connected to a second spring 71, and one end of the second spring 71 is fixedly connected to a positioning seat 72. The positioning seat 72 is rotatably connected to the fixed frame 3 through a support rod 73.

[0048] Preferably, bolts are provided on both sides of the fixing ring 7, and the outer insulating sleeve 22 is fixedly connected to the fixing ring 7 by bolts, and one end of the outer insulating sleeve 22 is connected to the positioning seat 72 through.

[0049] In this embodiment, as Figure 2 As shown, the lead wire 2 can pass through the fixed ring 7 and the positioning seat 72 through the outer insulating sleeve 22. The fixed ring 7 can be fixedly connected to the outer insulating sleeve 22 by bolts. When the fixing frame 3 is positioned and clamped on the outer surface of the transformer, the detection probe 21 can be attached to the surface of the transformer and a pressure reaction force is applied to the detection probe 21. At this time, the detection probe 21 pushes the fixed ring 7 connected to it to move through the outer insulating sleeve 22. The fixed ring 7 can pull the second spring 71 to extend and retract. The reaction force generated by the extension and retraction of the second spring 71 can pull the detection probe 21 to be tightly attached to the surface of the transformer shell. At the same time, the positioning seat 72 rotates on the fixing frame 3 through the support rod 73, and can adjust the rotation of the outer insulating sleeve 22 according to the inclination of the transformer surface.

[0050] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A transformer casing insulation tester, comprising a housing (1) and a tester body (4), wherein the tester body (4) is fixedly installed inside the housing (1), and a cover (11) provided on the housing (1) is used to close or open the tester body (4), characterized in that, A lead wire (2) is provided on one side of the detector body (4). A detection probe (21) connected to one end of the lead wire (2) is used to fit against the transformer shell. An outer insulating sleeve (22) is provided on the outer surface of the detection probe (21). An auxiliary mechanism is also included for positioning and detecting the detection probe (21). The auxiliary mechanism includes: A fixing frame (3) is provided with a first opening (31) and a second opening (32); Clamping plates (5), the clamping plates (5) are two symmetrically arranged on the fixing frame (3), and the two clamping plates (5) are used to clamp the transformer shell; Baffles (6), wherein two baffles (6) are symmetrically arranged; A fixing ring (7) is sleeved on the outer insulating sleeve (22) for adjusting the detection angle.

2. The transformer casing insulation tester according to claim 1, characterized in that: Two slide rods (33) are fixedly connected to the fixed frame (3), and the clamping plate (5) is slidably connected to the slide rods (33).

3. The transformer casing insulation tester according to claim 1, characterized in that: Limiting rods (51) are fixedly connected to opposite sides of the two clamping plates (5). One end of the limiting rod (51) is movably inserted through the baffle (6), and a first spring (52) is provided at the other end of the limiting rod (51) and fixed between the clamping plate (5) and the baffle (6).

4. The transformer casing insulation tester according to claim 1, characterized in that: A bidirectional screw (34) is rotatably connected to the fixed frame (3). The two ends of the bidirectional screw (34) are respectively connected to two baffles (6), and the baffles (6) are threadedly engaged with the bidirectional screw (34). The threads at both ends of the bidirectional screw (34) are opposite in direction. A knob (341) fixed on the bidirectional screw (34) is located between the two baffles (6).

5. The transformer tank insulation detection instrument of claim 1, wherein: Both the clamping plate (5) and the baffle (6) are movably connected to the slide rod (33).

6. The transformer tank insulation detection instrument of claim 1, wherein: The bottom end of the fixed ring (7) is fixedly connected to a second spring (71), and one end of the second spring (71) is fixedly connected to a positioning seat (72). The positioning seat (72) is rotatably connected to the fixed frame (3) through a support rod (73).

7. A transformer casing insulation tester according to claim 6, characterized in that: Bolts are provided on both sides of the fixing ring (7), and the outer insulating sleeve (22) is fixedly connected to the fixing ring (7) by bolts, and one end of the outer insulating sleeve (22) is connected to the positioning seat (72) through.

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