Auxiliary device for high-voltage cable oscillatory wave partial discharge test

Abstract

The auxiliary device comprises a box body, a first protection plate, a second protection plate, a fixing mechanism, an adjusting mechanism and a controller, the fixing mechanism is arranged in the bottom end of the box body, and the adjusting mechanism is arranged in the bottom end of the box body and at the top end of the fixing mechanism. The fixing mechanism comprises a first lead screw, a sliding block, a rotating plate, a sliding groove, a push plate, an arc-shaped plate and a first guide rail, the bottom end of the outer side of the box body is fixedly connected with a second protection plate, the sliding groove is formed in the outer wall of the second protection plate, the sliding block is slidably connected into the sliding groove, the first lead screw is in threaded connection with the interior of the sliding block, and one end of the first lead screw is rotationally connected with the push plate. One side of the push plate is fixedly connected with an arc-shaped plate, through the curved surface design of the arc-shaped plate, the clamp can adapt to high-voltage cables with different diameters, and the size limitation of a traditional rigid clamp is avoided.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage cable testing technology, specifically to an auxiliary device for testing partial discharge of oscillating waves in high-voltage cables. Background Technology

[0002] With the continuous development of my country's economy and the expansion of urban construction, the electricity load is also constantly increasing. Currently, the proportion of power cables used in my country's power transmission and distribution systems is continuously increasing. Cross-linked polyethylene (XLPE) cables have advantages such as good insulation performance, excellent heat dissipation and mechanical properties, and high power supply reliability. They have been applied to transmission lines and distribution networks of various voltage levels in the power system and are continuously expanding into high-voltage and ultra-high-voltage fields. To ensure the safe operation of high-voltage cables, industry regulations have proposed acceptance test standards, with AC withstand voltage testing being a mandatory test method.

[0003] Manually adjusting the spacing and angle of the test electrodes is time-consuming and difficult to guarantee positioning accuracy. Furthermore, different cable specifications require frequent clamp replacements, resulting in poor versatility. Therefore, an improved auxiliary device for partial discharge testing of high-voltage cables using oscillating waves is needed to solve these problems. Utility Model Content

[0004] In view of this, the present invention provides an auxiliary device for partial discharge testing of oscillating waves in high-voltage cables, so as to solve or alleviate the technical problems existing in the prior art, and at least provide a beneficial option.

[0005] The technical solution of this utility model embodiment is implemented as follows: an auxiliary device for partial discharge testing of oscillating waves in high-voltage cables includes a housing, a first protective plate, a second protective plate, a fixing mechanism, an adjusting mechanism, and a controller. The fixing mechanism is provided inside the bottom end of the housing, and the adjusting mechanism is provided inside the bottom end of the housing and at the top of the fixing mechanism.

[0006] The fixing mechanism includes a first lead screw, a slider, a rotating plate, a sliding groove, a push plate, an arc plate, and a first guide rail. A second protective plate is fixedly connected to the bottom outer side of the box. A sliding groove is opened on the outer wall of the second protective plate. A slider is slidably connected inside the sliding groove. A first lead screw is threadedly connected inside the slider. A push plate is rotatably connected to one end of the first lead screw. An arc plate is fixedly connected to one side of the push plate.

[0007] The adjustment mechanism includes a second guide rail, a support plate, a second lead screw, an adjustment plate, an electric push rod, a mounting plate, a motor, and electrodes. The second guide rail is fixedly connected to the left and right sides inside the housing. The adjustment plate is slidably connected inside the second guide rail. The top of the adjustment plate is fixedly connected to the electric push rod. The output end of the electric push rod is fixedly connected to the mounting plate. The bottom end of the mounting plate is fixedly connected to the electrodes.

[0008] More preferably, a first guide rail is fixedly connected inside the housing, and a push plate is slidably connected inside the first guide rail.

[0009] More preferably, a support plate is fixedly connected to the outer wall of the second guide rail, a second lead screw is rotatably connected to the outer wall of the support plate, an adjusting plate is threadedly connected to the outer wall of the second lead screw, a motor is fixedly connected to one end of the second lead screw, and a first protective plate is fixedly connected to the outer wall of the motor.

[0010] More preferably, a first protective plate is fixedly connected to the middle and top of the outer wall of the box.

[0011] More preferably, the bottom left and right sides of the box body are provided with wire holes of corresponding size.

[0012] More preferably, a controller is fixedly connected to the top of the housing, and the controller is electrically connected to a motor and an electric push rod.

[0013] This utility model embodiment, due to the adoption of the above technical solution, has the following advantages: In this utility model

[0014] 1. The curved surface design of the arc plate can accommodate high-voltage cables of different diameters, avoiding the size limitations of traditional rigid clamps;

[0015] Second, the adjustment mechanism adopts a combination of screw drive and guide rail, which is more compact and has lower maintenance costs compared with traditional hydraulic or pneumatic adjustment methods. It also supports fine adjustment to meet different needs of laboratory and field testing.

[0016] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

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

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional internal structure diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the fixing mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the adjustment mechanism of this utility model.

[0022] Reference numerals in the attached drawings: 1. Housing; 2. First protective plate; 3. Second protective plate; 4. Wire hole; 5. Fixing mechanism; 51. First lead screw; 52. Slider; 53. Rotating plate; 54. Slide groove; 55. Push plate; 56. Arc plate; 57. First guide rail; 6. Adjustment mechanism; 61. Second guide rail; 62. Support plate; 63. Second lead screw; 64. Adjustment plate; 65. Electric push rod; 66. Mounting plate; 67. Motor; 68. Electrode; 7. Controller. Detailed Implementation

[0023] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0024] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] Example

[0026] like Figures 1-4 As shown, this utility model embodiment provides an auxiliary device for partial discharge testing of high-voltage cable oscillating waves, including a housing 1, a first protective plate 2, a second protective plate 3, a fixing mechanism 5, an adjusting mechanism 6 and a controller 7. The fixing mechanism 5 is provided inside the bottom of the housing 1, and the adjusting mechanism 6 is provided inside the bottom of the housing 1 and at the top of the fixing mechanism 5.

[0027] The fixing mechanism 5 includes a first lead screw 51, a slider 52, a rotating plate 53, a slide groove 54, a push plate 55, an arc plate 56, and a first guide rail 57. A second protective plate 3 is fixedly connected to the bottom outer side of the housing 1. A slide groove 54 is opened on the outer wall of the second protective plate 3. A slider 52 is slidably connected inside the slide groove 54. The first lead screw 51 is threadedly connected inside the slider 52. One end of the first lead screw 51 is rotatably connected to the push plate 55. An arc plate 56 is fixedly connected to one side of the push plate 55. The high-voltage cable is passed through the opening at the bottom of the housing 1 and placed between two sets of arc plates 56 (each set of arc plates...). 56 corresponds to a fixed mechanism 5). At this time, the first lead screw 51 is in the initial position, the slider 52 is located in the groove 54 near the outer side of the housing 1, and the arc plate 56 is in slight contact with the cable but not clamped. The first lead screw 51 is driven to rotate by an external wrench or motor 67. Since the slider 52 is threadedly connected to the first lead screw 51, the slider 52 slides along the groove 54 towards the inner side of the housing 1, driving the push plate 55 to move synchronously. The push plate 55 pushes the arc plate 56 to apply pressure towards the cable. The curved surface of the arc plate 56 fits the outer surface of the cable to achieve adaptive clamping of cables of different diameters.

[0028] The adjustment mechanism 6 includes a second guide rail 61, a support plate 62, a second lead screw 63, an adjustment plate 64, an electric push rod 65, a mounting plate 66, a motor 67, and an electrode 68. The second guide rail 61 is fixedly connected to the left and right sides inside the housing 1. The adjustment plate 64 is slidably connected inside the second guide rail 61. The electric push rod 65 is fixedly connected to the top of the adjustment plate 64. The output end of the electric push rod 65 is fixedly connected to the mounting plate 66. The bottom end of the mounting plate 66 is fixedly connected to the electrode 68. The base of the adjustment mechanism 6 is fixed inside the bottom of the housing 1. The second lead screw 63 is fixed at the center of the support plate 2. The adjustment plate 64 is connected to the second lead screw 63 through a threaded hole and slides against the inner wall of the housing 1 through the second guide rails 61 on both sides to ensure smooth movement. The second lead screw 63 is rotated.

[0029] In one embodiment, specifically, the inside of the housing 1 is fixedly connected to a first guide rail 57, and the inside of the first guide rail 57 is slidably connected to a push plate 55.

[0030] In one embodiment, specifically, a support plate 62 is fixedly connected to the outer wall of the second guide rail 61, a second lead screw 63 is rotatably connected to the outer wall of the support plate 62, an adjusting plate 64 is threadedly connected to the outer wall of the second lead screw 63, a motor 67 is fixedly connected to one end of the second lead screw 63, and a first protective plate 2 is fixedly connected to the outer wall of the motor 67.

[0031] In one embodiment, specifically, a first protective plate 2 is fixedly connected to the middle and top of the outer wall of the housing 1.

[0032] In one embodiment, specifically, the bottom left and right sides of the housing 1 are provided with wire holes 4 of corresponding size.

[0033] In one embodiment, a controller 7 is fixedly connected to the top of the housing 1, and the controller 7 is electrically connected to a motor 67 and an electric push rod 65.

[0034] In operation, the high-voltage cable is passed through the bottom opening of the housing 1 and placed between two sets of arc-shaped plates 56 (each set of arc-shaped plates 56 corresponds to a fixing mechanism 5). At this time, the first lead screw 51 is in its initial position, and the slider 52 is located in the groove 54 near the outer side of the housing 1. The arc-shaped plates 56 are in slight contact with the cable but not clamped. The first lead screw 51 is driven to rotate by an external wrench or motor 67. Since the slider 52 is threadedly connected to the first lead screw 51, the slider 52 slides along the groove 54 towards the inside of the housing 1, driving the push plate 55 to move synchronously. The push plate 55 pushes the arc-shaped plates 56 to apply pressure towards the cable. By utilizing the curved surface of the arc-shaped plates 56 to conform to the outer surface of the cable, adaptive clamping for cables of different diameters is achieved. The base of the adjusting mechanism 6 is... The second lead screw 63 is fixed inside the bottom of the housing 1 and is fixed to the support plate 2 at the center. The adjustment plate 64 is connected to the second lead screw 63 through a threaded hole and slides against the inner wall of the housing 1 through the second guide rails 61 on both sides. When the second lead screw 63 is rotated, the adjustment plate 64 moves along the second guide rails 61, thereby adjusting the electrode. The controller 7 is connected to the oscillation wave generator, partial discharge detector and other equipment through wires, and receives test data in real time and displays it on the display screen. The operator can set test parameters (such as oscillation frequency and voltage amplitude) through the panel of the controller 7. After the test is started, the controller 7 automatically controls the adjustment electrode of the adjustment mechanism 6 and the start and stop of the test equipment to realize the fully automated operation. The controller 7 has a built-in overload protection module.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An auxiliary device for partial discharge testing of oscillating waves in high-voltage cables, comprising a housing (1), a first protective plate (2), a second protective plate (3), a fixing mechanism (5), an adjusting mechanism (6), and a controller (7), characterized in that: A fixing mechanism (5) is provided inside the bottom end of the box (1), and an adjustment mechanism (6) is provided inside the bottom end of the box (1) and at the top of the fixing mechanism (5). The fixing mechanism (5) includes a first lead screw (51), a slider (52), a rotating plate (53), a groove (54), a push plate (55), an arc plate (56), and a first guide rail (57). A second protective plate (3) is fixedly connected to the bottom outer side of the box (1). A groove (54) is provided on the outer wall of the second protective plate (3). A slider (52) is slidably connected inside the groove (54). A first lead screw (51) is threadedly connected inside the slider (52). A push plate (55) is rotatably connected to one end of the first lead screw (51). An arc plate (56) is fixedly connected to one side of the push plate (55). The adjustment mechanism (6) includes a second guide rail (61), a support plate (62), a second lead screw (63), an adjustment plate (64), an electric push rod (65), a mounting plate (66), a motor (67), and an electrode (68). The second guide rail (61) is fixedly connected to the left and right sides inside the housing (1). The adjustment plate (64) is slidably connected inside the second guide rail (61). The electric push rod (65) is fixedly connected to the top of the adjustment plate (64). The mounting plate (66) is fixedly connected to the output end of the electric push rod (65). The electrode (68) is fixedly connected to the bottom end of the mounting plate (66).

2. The auxiliary device for partial discharge testing of oscillating waves in high-voltage cables according to claim 1, characterized in that: The box (1) is fixedly connected to the inside of a first guide rail (57), and a push plate (55) is slidably connected inside the first guide rail (57).

3. The auxiliary device for partial discharge testing of oscillating waves in high-voltage cables according to claim 1, characterized in that: A support plate (62) is fixedly connected to the outer wall of the second guide rail (61). A second lead screw (63) is rotatably connected to the outer wall of the support plate (62). An adjusting plate (64) is threadedly connected to the outer wall of the second lead screw (63). A motor (67) is fixedly connected to one end of the second lead screw (63). A first protective plate (2) is fixedly connected to the outer wall of the motor (67).

4. The auxiliary device for partial discharge testing of oscillating waves in high-voltage cables according to claim 1, characterized in that: The outer wall of the box (1) is fixedly connected to the middle and top of the first protective plate (2).

5. The auxiliary device for partial discharge testing of oscillating waves in high-voltage cables according to claim 1, characterized in that: The bottom of the box (1) has wire holes (4) of corresponding size on the left and right sides.

6. The auxiliary device for partial discharge testing of oscillating waves in high-voltage cables according to claim 1, characterized in that: A controller (7) is fixedly connected to the top of the housing (1), and the controller (7) is electrically connected to a motor (67) and an electric push rod (65).

Images