A voltage transformer detuning device full-range test device and method

Abstract

The present invention discloses a full-scale test device for a voltage transformer harmonic elimination device, comprising: a main unit, comprising a test device main body, wherein the fixed sleeve and the vertical plate are jointly provided with a detection probe; an operating unit, comprising a plurality of first hoop plates, wherein a second hoop plate is provided on one side of the first hoop plate, a connecting assembly is provided between the second hoop plate and the first hoop plate, a symmetrical hollow rod is provided on one side of the first hoop plate, a fixed rod is fixedly connected between the hollow rod and the first hoop plate, a movable assembly is provided between the hollow rod and the connecting assembly, an energy storage assembly is provided in the hollow rod, a push assembly for driving the energy storage assembly is provided on the hollow rod, and a driving assembly for driving the push assembly is provided on the connecting assembly. The present invention inserts a sliding rod into a rectangular opening and pushes it to the right, so that the sliding rod can only move to the right, thereby achieving rapid installation of the voltage transformer, while improving the stability of the device in fixing the voltage transformer and improving the detection accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of harmonic elimination testing, and in particular to a full-range testing device and method for a voltage transformer harmonic elimination device. Background Art

[0002] A detuning device is a damping device that protects the primary side of a voltage transformer, eliminating resonances in the power grid. In 6-35kV power grids with ungrounded neutral points, electromagnetic voltage transformers (PTs) can oversaturate when the busbar is unloaded or has few outgoing lines. This can be caused by factors such as charging upon closing the circuit breaker or clearing a ground fault during operation. This can lead to ferroresonant overvoltages. This can cause relative voltage instability, false ground indication, and the blowing of the PT's high-voltage fuse. In severe cases, the PT can burn out, potentially causing other accidents. In such situations, a detuning device is necessary.

[0003] According to Chinese National Patent Publication No.: CN109444617A, a voltage transformer detuning device tester with a rapid detection and installation structure is disclosed, comprising a housing, a fixed sleeve at the front end of the housing, a detection rod mounted in the fixed sleeve, a detection probe at the front end of the detection rod, and a fixing mechanism mounted on the detection rod on the front side of the fixed sleeve, for quickly mounting the detection probe on the voltage transformer during testing. The present invention provides a voltage transformer detuning device tester with a rapid detection and installation structure, which has an ingenious structural setting and a reasonable layout. When the present invention is in operation, the detuning device is mounted on the voltage transformer, and the detuning effect of the detuning device is determined by measuring the resonant frequency of the voltage transformer, thereby testing the detuning device. The detection probe is quickly mounted on the voltage transformer via the fixing mechanism, which is convenient to operate. The present invention is ingeniously designed with a resonance detection mechanism, which facilitates the rapid and accurate detection of the resonance of the voltage transformer.

[0004] The device fixes the voltage transformer through two claws and a spring, which is simple and convenient to operate. However, it is fixed by the elasticity of the spring. During the test, the spring itself has the elasticity to move, which makes its stability poor and affects the test accuracy of the device. Summary of the Invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A full-range test device for a voltage transformer harmonic elimination device, comprising:

[0008] The main unit includes a test device body, a plurality of brake-stopping universal wheels are provided at the bottom of the test device body, a fixed sleeve is fixedly connected to the test device body, a vertical plate is fixedly connected to the fixed sleeve, and a detection probe is provided on the fixed sleeve and the vertical plate;

[0009] The working unit includes multiple first hoop plates, which are fixedly connected to the vertical plate. A second hoop plate is provided on one side of the first hoop plate. A connecting assembly is provided between the second hoop plate and the first hoop plate. A symmetrical hollow rod is provided on one side of the first hoop plate. A fixed rod is fixedly connected between the hollow rod and the first hoop plate. A movable assembly is provided between the hollow rod and the connecting assembly. An energy storage assembly is provided in the hollow rod. A pushing assembly for driving the energy storage assembly is provided on the hollow rod. A driving assembly for driving the pushing assembly is provided on the connecting assembly.

[0010] As a preferred solution of the full-range test device of a voltage transformer harmonic elimination device described in the present invention, the connecting assembly includes a sliding rod, the sliding rod is fixedly connected to the second hoop plate, the first hoop plate is symmetrically provided with rectangular openings, the sliding rod is slidably arranged in the rectangular opening, a plurality of first clamping blocks are fixedly connected to the sliding rod, an annular plate is symmetrically fixedly connected to the first hoop plate, a second clamping block is slidably connected to the annular plate, and the first clamping block cooperates with the second clamping block.

[0011] As a preferred solution of the voltage transformer detuner full-range test device described in the present invention, the connecting assembly also includes a first permanent magnet, the first permanent magnet is arranged on the second clamping block, the first hoop plate is fixedly connected to a fixed plate, the fixed plate is provided with a second permanent magnet, and the first permanent magnet and the second permanent magnet have the same magnetic poles on opposite sides.

[0012] As a preferred solution of the full-range testing device of a voltage transformer harmonic elimination device described in the present invention, the movable component includes a push rod, which is slidably inserted into the hollow rod, and a first piston plate is slidably connected to the inner wall of the hollow rod, and the push rod is fixedly connected to the first piston plate, and a slot is provided on the second clamping block, and the push rod matches the slot.

[0013] As a preferred solution of the full-range test device of a voltage transformer harmonic elimination device described in the present invention, the energy storage component includes a first partition and a second partition, the first partition and the second partition are fixedly connected to the inner wall of the hollow rod, a one-way valve and a first solenoid valve are respectively provided on the first partition and the second partition, a second piston plate is slidably connected to the inner wall of the hollow rod, a T-shaped rod is fixedly connected to the second piston plate, and air vents are symmetrically opened on the hollow rod.

[0014] As a preferred solution of the full-range test device of a voltage transformer harmonic elimination device described in the present invention, the movable component also includes two third permanent magnets, the push rod is arranged on the second partition plate, the first piston plate is made of metal material iron, the third permanent magnet cooperates with the first piston plate, and an air outlet pipe is fixedly connected to the hollow rod, and a second solenoid valve is provided on the air outlet pipe.

[0015] As a preferred solution of the full-range test device of a voltage transformer harmonic elimination device described in the present invention, wherein: the pushing assembly includes two movable rods, the hollow rod is symmetrically provided with rectangular openings, the T-shaped rod is slidably connected to the inner wall of the rectangular opening, the movable rod is elastically slidably connected to the T-shaped rod, the vertical plate is symmetrically rotatably connected with a round rod, the round rod is symmetrically fixedly connected with an extrusion rod, the extrusion rod cooperates with the movable rod, and a spring is fixedly connected between the T-shaped rod and the inner wall of the hollow rod.

[0016] As a preferred solution of the voltage transformer harmonic elimination device full-range test device described in the present invention, the driving assembly includes a gear, the gear is fixedly connected to the round rod, and a plurality of third blocks are fixedly connected to the sliding rod, and the gear cooperates with the third blocks.

[0017] As a preferred solution of the voltage transformer harmonic elimination full-range test device described in the present invention, wherein: the first hoop plate and the second hoop plate are both provided with elastic pads, and the elastic pads are made of rubber material.

[0018] The method for using the voltage transformer detuning device full-range test device as described above is as follows:

[0019] S1. Place the voltage transformer on one side of the first hoop plate, then insert the sliding rod into the rectangular opening and push it to the right. The first and second clamping blocks cooperate to ensure that the sliding rod can only move to the right, thus achieving rapid installation of the voltage transformer.

[0020] S2. As the sliding rod moves to the right, the third block and the gear cooperate to rotate the round rod, driving the extrusion rod to rotate. When the extrusion rod contacts the movable rod, it drives the T-shaped rod to move toward the first hoop plate. When it moves to the limit, it squeezes the movable rod inward. Then the extrusion rod and the movable rod are separated, and the T-shaped rod is reset under the action of the spring. This reciprocating process drives the second piston plate to move left and right, squeezing air into the space between the first and second partitions for storage, generating high pressure inside.

[0021] S3. After the detection is completed, the first solenoid valve is opened to allow gas to enter between the second partition plate and the first piston plate, pushing the first piston plate to move the push rod toward the second card block. The push rod is inserted into the card slot through the cooperation with the card slot, and at the same time, the second card block is driven to move downward and detach from the first card block. Then the user pulls out the second hoop plate to disassemble the voltage transformer. The operation is simple and convenient.

[0022] Beneficial effects of the present invention:

[0023] 1. Place the voltage transformer on one side of the first hoop plate, then insert the sliding rod into the rectangular opening and push it to the right. Through the cooperation of the first clamp block and the second clamp block, the sliding rod can only move to the right, thereby realizing the rapid installation of the voltage transformer. It is applicable to voltage transformers of various specifications, and at the same time improves the stability of the device in fixing the voltage transformer and improves the detection accuracy.

[0024] 2. After the detection is completed, open the first solenoid valve to allow gas to enter between the second partition plate and the first piston plate, push the first piston plate, and move the push rod toward the second card block. When the push rod cooperates with the card slot and is inserted into the card slot, the second card block is driven to move downward and detach from the first card block. Then the user pulls out the second hoop plate to disassemble the voltage transformer. The operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0026] Figure 1 This is a schematic diagram of the overall front structure of a voltage transformer detuning device full-range test device proposed by the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the local structure;

[0028] Figure 3 for Figure 2 Schematic diagram of the local structure;

[0029] Figure 4 for Figure 3 A in the middle is an enlarged structural diagram;

[0030] Figure 5 for Figure 3 Partial rear view;

[0031] Figure 6 for Figure 5 Schematic diagram of the local cross-section structure;

[0032] Figure 7 for Figure 5 Schematic diagram of the local cross-sectional structure.

[0033] In the figure: 100, main unit; 101, test equipment body; 102, brake universal wheel; 103, fixed sleeve; 104, vertical plate; 105, detection probe; 200, working unit; 201, first hoop plate; 202, second hoop plate; 203, connecting assembly; 203a, rectangular opening; 203b, sliding rod; 203c, first clamping block; 203d, annular plate; 203e, second clamping block; 203f, first permanent magnet; 203g, fixed plate; 203h, second permanent magnet; 204, hollow rod; 205, fixed rod; 206, movable assembly; 206 a. Push rod; 206b. First piston plate; 206c. Card slot; 206d. Third permanent magnet; 206e. Exhaust pipe; 207. Energy storage assembly; 207a. First partition; 207b. Second partition; 207c. One-way valve; 207d. First solenoid valve; 207e. Second piston plate; 207f. T-bar; 207g. Air vent; 208. Push assembly; 208a. Rectangular opening; 208b. Movable rod; 208c. Round rod; 208d. Extrusion rod; 208e. Spring; 209. Drive assembly; 209a. Gear; 209b. Third card block. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0037] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0038] Reference Figure 1-7 The present invention provides a full-range test device for a voltage transformer harmonic elimination device, comprising:

[0039] The main unit 100 includes a test device body 101, a plurality of brake-stopping universal wheels 102 are provided at the bottom of the test device body 101, a fixed sleeve 103 is fixedly connected to the test device body 101, a vertical plate 104 is fixedly connected to the fixed sleeve 103, and a detection probe 105 is provided on both the fixed sleeve 103 and the vertical plate 104;

[0040] The working unit 200 includes multiple first hoop plates 201, the first hoop plates 201 are fixedly connected to the vertical plate 104, a second hoop plate 202 is provided on one side of the first hoop plate 201, a connecting assembly 203 is provided between the second hoop plate 202 and the first hoop plate 201, a symmetrical hollow rod 204 is provided on one side of the first hoop plate 201, a fixed rod 205 is fixedly connected between the hollow rod 204 and the first hoop plate 201, a movable assembly 206 is provided between the hollow rod 204 and the connecting assembly 203, an energy storage assembly 207 is provided in the hollow rod 204, a pushing assembly 208 for driving the energy storage assembly 207 is provided on the hollow rod 204, and a driving assembly 209 for driving the pushing assembly 208 is provided on the connecting assembly 203.

[0041] Among them, the connecting component 203 includes a sliding rod 203b, which is fixedly connected to the second hoop plate 202, and a rectangular opening 203a is symmetrically opened on the first hoop plate 201. The sliding rod 203b is slidably set in the rectangular opening 203a, and a plurality of first clamping blocks 203c are fixedly connected to the sliding rod 203b. An annular plate 203d is symmetrically fixedly connected to the first hoop plate 201, and a second clamping block 203e is slidably connected to the annular plate 203d. The first clamping block 203c cooperates with the second clamping block 203e. The user can insert the sliding rod 203b into the rectangular opening 203a. Through the cooperation of the first clamping block 203c and the second clamping block 203e, the sliding rod 203b can only move toward the first hoop plate 201 and restrict it to achieve quick installation.

[0042] Furthermore, the connecting component 203 also includes a first permanent magnet 203f, which is arranged on the second block 203e. A fixed plate 203g is fixedly connected to the first hoop plate 201, and a second permanent magnet 203h is arranged on the fixed plate 203g. The first permanent magnet 203f and the second permanent magnet 203h have the same magnetic poles on opposite surfaces. The cooperation between the second permanent magnet 203h and the first permanent magnet 203f provides a repulsive force to the second block 203e, so that the second block 203e always has a tendency to move toward the sliding rod 203b.

[0043] Furthermore, the movable component 206 includes a push rod 206a, which is slidably inserted into the hollow rod 204. A first piston plate 206b is slidably connected to the inner wall of the hollow rod 204. The push rod 206a is fixedly connected to the first piston plate 206b. A slot 206c is provided on the second block 203e. The push rod 206a cooperates with the slot 206c, so that when the push rod 206a moves toward the second block 203e, it can be inserted into the slot 206c through the cooperation of the push rod 206a and the slot 206c, while driving the second block 203e to move downward and disengage from the first block 203c, making it easy to disassemble it.

[0044] Furthermore, the energy storage assembly 207 includes a first partition plate 207a and a second partition plate 207b, and the first partition plate 207a and the second partition plate 207b are fixedly connected to the inner wall of the hollow rod 204. The first partition plate 207a and the second partition plate 207b are respectively provided with a one-way valve 207c and a first solenoid valve 207d. A second piston plate 207e is slidingly connected to the inner wall of the hollow rod 204, and a T-shaped rod 207f is fixedly connected to the second piston plate 207e. Vent holes 207g are symmetrically provided on the hollow rod 204, so that when the second piston plate 207e moves left and right, air can be squeezed into the space between the first partition plate 207a and the second partition plate 207b for storage, so that high pressure is always generated inside.

[0045] Furthermore, the movable component 206 also includes two third permanent magnets 206d, the push rod 206a is arranged on the second partition plate 207b, the first piston plate 206b is made of metal material iron, the third permanent magnet 206d cooperates with the first piston plate 206b, and the hollow rod 204 is fixedly connected to the air outlet pipe 206e. The air outlet pipe 206e is provided with a second solenoid valve, so that the user can discharge the gas between the second partition plate 207b and the first piston plate 206b through the second solenoid valve, and then the push rod 206a is driven to reset by the adsorption force between the third permanent magnet 206d and the first piston plate 206b.

[0046] Furthermore, the push assembly 208 includes two movable rods 208b, a rectangular opening 208a is symmetrically opened on the hollow rod 204, a T-shaped rod 207f is slidably connected to the inner wall of the rectangular opening 208a, and the movable rod 208b is elastically slidably connected to the T-shaped rod 207f. A round rod 208c is symmetrically rotated and connected to the vertical plate 104, and an extrusion rod 208d is symmetrically fixedly connected to the round rod 208c. The extrusion rod 208d cooperates with the movable rod 208b, and the T-shaped rod 207f is connected to the hollow rod 20 A spring 208e is fixedly connected between the inner walls, so that when the round rod 208c rotates, it can drive the extrusion rod 208d to rotate. The extrusion rod 208d contacts the movable rod 208b, driving the T-shaped rod 207f to move toward the first hoop plate 201. When the movement reaches the limit, the movable rod 208b is squeezed inward, and then the extrusion rod 208d and the movable rod 208b are separated. The T-shaped rod 207f is reset under the action of the spring 208e. This reciprocating process drives the second piston plate 207e to move left and right.

[0047] Furthermore, the driving assembly 209 includes a gear 209a, which is fixedly connected to the round rod 208c. A plurality of third clamping blocks 209b are fixedly connected to the sliding rod 203b. The gear 209a cooperates with the third clamping block 209b, so that when the sliding rod 203b moves toward the test device body 101, the round rod 208c can be driven to rotate through the cooperation between the gear 209a and the third clamping block 209b.

[0048] Furthermore, elastic pads are provided on the first hoop plate 201 and the second hoop plate 202. The elastic pads are made of rubber material so that they can be in flexible contact with the voltage transformer when fixed to avoid damage to the voltage transformer.

[0049] During use, the voltage transformer is placed on one side of the first hoop plate 201, and then the sliding rod 203b is inserted into the rectangular opening 203a and pushed to the right. The first clamping block 203c cooperates with the second clamping block 203e, so that the sliding rod 203b can only move to the right, thereby realizing the rapid installation of the voltage transformer; while the sliding rod 203b moves to the right, the third clamping block 209b cooperates with the gear 209a to make the round rod 208c rotate, driving the extrusion rod 208d to rotate, and when the extrusion rod 208d contacts the movable rod 208b, it drives the T-shaped rod 207f to move toward the first hoop plate 201. When it moves to the limit, the movable rod 208b is squeezed inward, and then the extrusion rod 208d is separated from the movable rod 208b, and the T-shaped rod 207f is moved to the first hoop plate 201. 07f is reset under the action of spring 208e, and this reciprocating process drives the second piston plate 207e to move left and right, squeezing the air into the space between the first partition plate 207a and the second partition plate 207b for storage, thereby generating high pressure inside the space; after the detection is completed, the first solenoid valve 207d is opened to allow the gas to enter between the second partition plate 207b and the first piston plate 206b, pushing the first piston plate 206b, causing the push rod 206a to move toward the second block 203e, and while the push rod 206a is inserted into the slot 206c through the cooperation with the slot 206c, it drives the second block 203e to move downward and disengage from the first block 203c, and then the user pulls out the second hoop plate 202 to disassemble the voltage transformer, which is simple and convenient to operate.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A full-range test device for a voltage transformer harmonic elimination device, characterized in that: include: The main unit (100) comprises a test device main body (101), a plurality of brake-stopping universal wheels (102) are provided at the bottom of the test device main body (101), a fixed sleeve (103) is fixedly connected to the test device main body (101), a vertical plate (104) is fixedly connected to the fixed sleeve (103), and a detection probe (105) is provided on both the fixed sleeve (103) and the vertical plate (104); The operating unit (200) comprises a plurality of first hoop plates (201), wherein the first hoop plates (201) are fixedly connected to the vertical plate (104), a second hoop plate (202) is provided on one side of the first hoop plate (201), a connecting assembly (203) is provided between the second hoop plate (202) and the first hoop plate (201), a symmetrical hollow rod (204) is provided on one side of the first hoop plate (201), a fixed rod (205) is fixedly connected between the hollow rod (204) and the first hoop plate (201), a movable assembly (206) is provided between the hollow rod (204) and the connecting assembly (203), an energy storage assembly (207) is provided in the hollow rod (204), a pushing assembly (208) for driving the energy storage assembly (207) is provided on the hollow rod (204), and a driving assembly (209) for driving the pushing assembly (208) is provided on the connecting assembly (203); The connecting assembly (203) includes a sliding rod (203b), the sliding rod (203b) is fixedly connected to the second hoop plate (202), a rectangular opening (203a) is symmetrically opened on the first hoop plate (201), the sliding rod (203b) is slidably arranged in the rectangular opening (203a), a plurality of first clamping blocks (203c) are fixedly connected to the sliding rod (203b), an annular plate (203d) is symmetrically fixedly connected to the first hoop plate (201), a second clamping block (203e) is slidably connected to the annular plate (203d), and the first clamping block (203c) cooperates with the second clamping block (203e); The connecting assembly (203) further includes a first permanent magnet (203f), the first permanent magnet (203f) being arranged on a second clamping block (203e), a fixing plate (203g) being fixedly connected to the first hoop plate (201), a second permanent magnet (203h) being arranged on the fixing plate (203g), and the first permanent magnet (203f) and the second permanent magnet (203h) having the same magnetic poles on opposite surfaces.

2. A voltage transformer harmonic elimination full-range test device according to claim 1, characterized in that: The movable component (206) includes a push rod (206a), the push rod (206a) is slidably inserted into the hollow rod (204), a first piston plate (206b) is slidably connected to the inner wall of the hollow rod (204), the push rod (206a) is fixedly connected to the first piston plate (206b), and a slot (206c) is provided on the second clamping block (203e), and the push rod (206a) cooperates with the slot (206c).

3. A voltage transformer harmonic elimination full-range test device according to claim 2, characterized in that: The energy storage assembly (207) comprises a first partition (207a) and a second partition (207b), wherein the first partition (207a) and the second partition (207b) are fixedly connected to the inner wall of the hollow rod (204), a one-way valve (207c) and a first solenoid valve (207d) are respectively provided on the first partition (207a) and the second partition (207b), a second piston plate (207e) is slidably connected to the inner wall of the hollow rod (204), a T-shaped rod (207f) is fixedly connected to the second piston plate (207e), and ventilation holes (207g) are symmetrically provided on the hollow rod (204).

4. A voltage transformer harmonic elimination full-range test device according to claim 3, characterized in that: The movable component (206) also includes two third permanent magnets (206d), the push rod (206a) is arranged on the second partition plate (207b), the first piston plate (206b) is made of metal material iron, the third permanent magnet (206d) cooperates with the first piston plate (206b), and the hollow rod (204) is fixedly connected to an air outlet pipe (206e), and the air outlet pipe (206e) is provided with a second solenoid valve.

5. A voltage transformer harmonic elimination full-range test device according to claim 4, characterized in that: The pushing assembly (208) includes two movable rods (208b), a rectangular opening (208a) is symmetrically opened on the hollow rod (204), the T-shaped rod (207f) is slidably connected to the inner wall of the rectangular opening (208a), the movable rod (208b) is elastically slidably connected to the T-shaped rod (207f), a round rod (208c) is symmetrically rotatably connected to the vertical plate (104), an extrusion rod (208d) is symmetrically fixedly connected to the round rod (208c), the extrusion rod (208d) cooperates with the movable rod (208b), and a spring (208e) is fixedly connected between the T-shaped rod (207f) and the inner wall of the hollow rod (204).

6. A voltage transformer harmonic elimination full-range test device according to claim 5, characterized in that: The driving assembly (209) comprises a gear (209a), the gear (209a) is fixedly connected to the round rod (208c), a plurality of third clamping blocks (209b) are fixedly connected to the sliding rod (203b), and the gear (209a) cooperates with the third clamping blocks (209b).

7. A voltage transformer harmonic elimination full-range test device according to claim 6, characterized in that: The first hoop plate (201) and the second hoop plate (202) are both provided with elastic pads, and the elastic pads are made of rubber material.

8. A method for using a voltage transformer harmonic elimination full-range test device according to any one of claims 1 to 7, characterized in that: The steps include: S1. Place the voltage transformer on one side of the first hoop plate (201), then insert the sliding rod (203b) into the rectangular opening (203a) and push it to the right. Through the cooperation of the first clamping block (203c) and the second clamping block (203e), the sliding rod (203b) can only move to the right, thereby achieving rapid installation of the voltage transformer; S2. When the sliding rod (203b) moves to the right, the round rod (208c) rotates through the cooperation of the third block (209b) and the gear (209a), driving the extrusion rod (208d) to rotate. When the extrusion rod (208d) contacts the movable rod (208b), the T-shaped rod (207f) moves toward the first hoop plate (201). When the movement reaches the limit, the movable rod (208b) is squeezed inward. Then, the extrusion rod (208d) is separated from the movable rod (208b), and the T-shaped rod (207f) is reset under the action of the spring (208e). This reciprocating process drives the second piston plate (207e) to move left and right, squeezing air into the space between the first partition plate (207a) and the second partition plate (207b) for storage, thereby generating high pressure inside the space; S3. After the detection is completed, the first solenoid valve (207d) is opened to allow the gas to enter between the second partition plate (207b) and the first piston plate (206b), and the first piston plate (206b) is pushed, so that the push rod (206a) moves toward the second clamping block (203e). The push rod (206a) is inserted into the clamping slot (206c) through the cooperation with the clamping slot (206c), and at the same time, the second clamping block (203e) is driven to move downward and detach from the first clamping block (203c). Then the user pulls out the second hoop plate (202) to disassemble the voltage transformer. The operation is simple and convenient.

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