Electric power high-voltage test isolation device and use method

Abstract

The invention discloses an electric power high-voltage test isolation device and a use method. The electric power high-voltage test isolation device comprises a stand column and a control assembly. The number of the stand columns is two, a rhombic telescopic frame is installed between the two stand columns, the lower ends of the two stand columns are slidably connected with supporting bases capable of being locked, the front sides and the rear sides of the lower ends of the two stand columns are rotatably connected with rotating arms, and universal trundles are arranged at the ends, away from the stand columns, of the lower surfaces of the four rotating arms. Gears are arranged at the ends, close to the stand column, of the four rotating arms, and every two longitudinally-corresponding gears are connected in a meshed mode; the control assembly is used for controlling positioning of the rotating arm and comprises a sliding block, a connecting rod, an arc-shaped groove and a pressing strip, according to the electric power high-voltage test isolation device and the using method, the supporting range is large, the stability is good, dumping and moving of the device can be avoided, the using safety is high, and the moving convenience is good in the laying process; after being used, the device can be shrunk to facilitate storage, operation is easy, and use convenience is good.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power experiments, and in particular to an electric power high voltage test isolation device and a use method thereof. Background Art

[0002] In order to ensure the safety of power equipment during use, a high-voltage test is conducted before use. High-voltage test refers to the test method of the electrical performance of electrical equipment using high voltage. According to the test results, various performances are analyzed and judged, latent defects are eliminated, and equipment aging and degradation problems are promptly discovered and dealt with, so as to determine the reliability of equipment operation. In the power high-voltage test, an isolation device is used to isolate the test location. The existing isolation device is generally fence-type, with a simple structure and low cost. Its leg structure is generally fixed and cannot be folded. When the volume is small, there will be the disadvantages of small support range and poor stability, which is easy to tip over and affect safety. When the volume is increased, although the stability can be improved, there will be the disadvantage of large volume and inconvenience in storage. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide an electric high-voltage test isolation device and a method of use. The device has a large supporting range and good stability, can avoid its own tipping and movement, has high safety in use, and is easy to move when deployed. After use, it can be retracted for easy storage. It is simple to operate and easy to use, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: an electric high-voltage test isolation device, comprising a column and a control assembly; Columns: There are two of them, with a diamond-shaped telescopic frame installed between the two columns. The lower ends of the two columns are slidably connected to a lockable support seat, and the front and rear sides of the lower ends of the two columns are rotatably connected to rotating arms. The ends of the lower surfaces of the four rotating arms away from the columns are all provided with universal casters, and the ends of the four rotating arms close to the columns are all provided with gears, and the two corresponding gears in the longitudinal direction are meshed and connected; Control component: used to control the positioning of the rotating arm, with a rotating arm that can be rotated and locked and a supporting seat that extends and self-locks. It has a large support range and good stability to avoid its own tipping and movement. It is highly safe to use and easy to move during deployment. It can be retracted after use for easy storage. It is simple to operate and easy to use.

[0005] Furthermore, the control component includes a slider, a connecting rod, an arc groove and a pressure strip. The sliders are respectively slidably connected to the middle parts of the two columns. The lower ends of the sliders are rotatably connected to the connecting rods. The lower ends of the two connecting rods are rotatably connected to the vertically corresponding rotating arms. The upper ends of the front sides of the two sliders are slidably connected to the pressure strips. Four arc grooves are opened in the middle parts of the two columns. The four arc grooves on the same column are divided into two groups. The two arc grooves in one group are horizontally arranged. The eight arc grooves are all arranged in cooperation with the pressure strip on the same column to facilitate the positioning of the rotating arm.

[0006] Furthermore, the control component also includes a plum blossom bolt and a nut block, and the nut blocks are respectively arranged at the upper end of the front side of the slider. The middle parts of the two nut blocks are threadedly connected with a plum blossom bolt, and the two plum blossom bolts are respectively arranged in cooperation with the corresponding longitudinal pressure strips to facilitate the fixation of the pressure strips.

[0007] Furthermore, the control component also includes spring sheets, which are respectively arranged at the left and right ends of the nut block. The four spring sheets are all arranged in cooperation with the corresponding longitudinal pressure strips to facilitate the positioning of the pressure strips.

[0008] Furthermore, the rear ends of the columns are rotatably connected to rotating disks, and guide sliding holes are opened on the rear sides of the two rotating disks. The circular shafts at the upper ends of the two support seats are slidably connected to the vertically corresponding guide sliding holes, which facilitates the control of the extension and locking of the support seats.

[0009] Furthermore, it also includes a handle, wherein there are two handles, and the two handles are respectively arranged on the outer arc surfaces of the two rotating disks to facilitate the control of the rotation of the rotating disks.

[0010] Furthermore, a tension spring is provided between the circular shaft and the convex column in the middle of the column to provide an upward pulling force to the support seat.

[0011] Furthermore, studs are provided on the upper sides of the left and right ends of the diamond-shaped telescopic frame, and the studs are slidably connected to the long sliding holes on the upper ends of the side surfaces of the columns respectively. The ends of the two studs away from the diamond-shaped telescopic frame are threadedly connected with plum nuts, which facilitates the shaping of the diamond-shaped telescopic frame.

[0012] A method for using an electric high voltage test isolation device comprises the following steps: (S1: Expand the legs: pull the rotating arm downward, and the rotating arm will rotate in the opposite direction synchronously under the action of the gear to expand. The rotating arm drives the slider to slide downward along the column through the connecting rod, and the slider drives the pressure strip and the spring sheet to move synchronously. The pressure strip will gradually move to the inside of the arc groove on the lower side, and the spring sheet will reset to perform preliminary positioning of the rotating arm. The rotating arm is perpendicular to the column, and the plum bolt is tightened to limit the movement of the pressure strip and lock the rotating arm; (S2: Move: Pull the column, and the column moves under the support of the rotating arm and universal casters, and move the diamond telescopic frame to the electric high-voltage test isolation position; (S3: Expand and isolate: Pull the two columns apart, the diamond-shaped telescopic frame is stretched and expanded, and the angle of the diamond-shaped telescopic frame changes during the expansion process. At the same time, the upper end of the diamond-shaped telescopic frame drives the stud to slide downward along the long sliding hole at the upper end of the side of the column. After expanding to the width to be used, tighten the plum nut. The plum nut will press the column under the action of the stud, thereby realizing the finalization of the diamond-shaped telescopic frame. The diamond-shaped telescopic frame isolates the high-voltage test site; (S4: Extend and position: Push the handle downward, the handle drives the rotating disk to rotate, the circular shaft at the upper end of the support seat and the arc groove slide relative to each other, when the circular shaft moves to the inside of the bayonet at the end of the arc groove away from the rotation center of the rotating disk, the rotating disk self-locks, the support seat is level with the lowest point of the universal caster and contacts the ground at the same time, the support seat increases the friction with the ground, and limits the movement of the diamond telescopic frame; (S5: Folding for storage: After use, the control support seat is retracted upward, the diamond-shaped telescopic frame is closed, and after moving to the storage position, the rotating arm is folded to reduce its own volume for easy storage.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the electric high voltage test isolation device and the use method have the following advantages: 1. When in use, the universal casters and support base at the lower end of the rotating arm are in contact with the ground at the same time to provide support for the column. The large support range and good stability can prevent itself from tipping over, greatly improving the safety of isolation during high-voltage power testing.

[0014] 2. After the support base is retracted, it can be moved using universal casters. After moving to the storage position, the rotating arm can be folded, so that it has good mobility when deployed. After use, its volume can be reduced for easy storage, which greatly improves the convenience of using the electric high-voltage test isolation device.

[0015] 3. The diamond-shaped telescopic frame can be positioned by the cooperation of plum bolts and pressure strips. At the same time, the operating handle can be used to control the support seat to be self-locking after it is extended. The electric high-voltage test isolation device is simple and convenient to operate and has good convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the enlarged structure of location A of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of a column of the present invention; Figure 4 This is an enlarged structural diagram of B of the present invention; Figure 5It is a schematic cross-sectional structural diagram of the rear side of the column of the present invention; Figure 6 This is a schematic diagram of the enlarged structure of position C of the present invention; Figure 7 It is a structural schematic diagram of the rotating disk of the present invention.

[0017] In the figure: 1 column, 2 diamond telescopic frame, 3 stud, 4 plum nut, 5 gear, 6 universal caster, 7 control assembly, 71 slider, 72 connecting rod, 73 arc groove, 74 pressure strip, 75 spring sheet, 76 plum bolt, 77 nut block, 8 rotating plate, 9 guide slide hole, 10 handle, 11 tension spring, 12 support seat, 13 rotating arm. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-7 ,This embodiment provides a technical solution: an electric high voltage test isolation device, comprising a column 1 and a control assembly 7; Columns 1: There are two of them. A diamond-shaped telescopic frame 2 is installed between the two columns 1. When the two columns 1 are pulled apart, the diamond-shaped telescopic frame 2 is stretched and unfolded. The diamond-shaped telescopic frame 2 is connected by connecting rods and pins to form a diamond structure. Multiple diamond structures of the same size are stacked together. They can be freely extended and retracted using the parallelogram instability principle. The angle of the diamond-shaped telescopic frame 2 changes during its extension. The lower end of the diamond-shaped telescopic frame 2 is rotatably connected to the column 1. The lower ends of the two columns 1 are slidably connected to a lockable support seat 12. The front and rear sides of the lower ends of the two columns 1 are rotatably connected to a rotating arm 13. The rotating arm 13 is pulled downward, and the rotating arm 13 rotates around the rotating axis at the lower end of the column 1. The four rotating arms 13 The lower surface is provided with a universal caster 6 at one end away from the column 1, and the universal caster 6 is in contact with the ground. The column 1 moves under the support of the rotating arm 13 and the universal caster 6. The four rotating arms 13 are provided with a gear 5 at one end close to the column 1. The two corresponding gears 5 are meshed and connected in the longitudinal direction. The rotating arm 13 drives the other rotating arm 13 to rotate synchronously in the opposite direction through the two meshed gears 5. The rear end of the column 1 is rotatably connected with a rotating disk 8. The rear side surfaces of the two rotating disks 8 are provided with guide sliding holes 9. The guide sliding holes 9 move synchronously with the rotating disk 8. The circular shafts at the upper ends of the two support seats 12 are slidably connected with the vertically corresponding guide sliding holes 9. The circular shafts at the upper ends of the support seats 12 slide relative to the guide sliding holes 9, driving When the support seat 12 moves downward and the circular shaft moves to the end of the guide sliding hole 9 away from the rotation center of the rotating disk 8, the support seat 12 is level with the lowest point of the universal caster 6 and contacts the ground at the same time, thereby limiting the movement of the column 1. The end of the guide sliding hole 9 away from the rotation center of the rotating disk 8 is provided with a bayonet, and the bayonet is close to the rotation center of the rotating disk 8, thereby reducing the distance between the circular shaft and the rotation center of the rotating disk 8. Therefore, when the rotating disk 8 rotates in the opposite direction, it is necessary to drive the column 1 to move upward under the support of the circular shaft, and then the rotation of the rotating disk 8 can be limited by the gravity of the column 1, and self-locking can be achieved. It also includes a handle 10. There are two handles 10. The two handles 10 are respectively arranged on the outer arc surfaces of the two rotating disks 8. Pull the handle 10 downward, the handle 10 drives the rotating disk 8 to rotate, and a tension spring 11 is provided between the circular shaft and the convex column in the middle of the column 1. The tension spring 11 exerts an upward pulling force on the support seat 12 to prevent the support seat 12 from moving downward under gravity after contraction. Studs 3 are provided on the upper sides of the left and right ends of the diamond telescopic frame 2, and the studs 3 are respectively slidably connected with the long sliding holes on the upper end of the side of the column 1. The ends of the two studs 3 away from the diamond telescopic frame 2 are threadedly connected with plum nuts 4. The upper end of the diamond telescopic frame 2 drives the studs 3 to slide downward along the long sliding holes on the upper end of the side of the column 1. After expanding to the width of use, the plum nuts 4 are tightened. The plum nuts 4 will press the column 1 under the action of the studs 3, thereby realizing the shaping of the diamond telescopic frame 2; Control assembly 7: used to control the positioning of the rotating arm 13, the control assembly 7 includes a slider 71, a connecting rod 72, an arc groove 73 and a pressure strip 74, the sliders 71 are respectively slidably connected to the middle of the two columns 1, the lower ends of the sliders 71 are rotatably connected to the connecting rods 72, the lower ends of the two connecting rods 72 are rotatably connected to the vertically corresponding rotating arms 13, the rotating arm 13 drives the slider 71 to slide downward along the column 1 through the connecting rod 72, the upper ends of the front sides of the two sliders 71 are slidably connected to the pressure strip 74, four arc grooves 73 are opened in the middle of the two columns 1, the four arc grooves 73 on the same column 1 are divided into two groups, the two arc grooves 73 in one group are horizontally arranged, and the eight arc grooves 73 are all arranged in coordination with the pressure strip 74 on the same column 1, the control assembly 7 also includes a plum bolt 76 and a nut block 77, the nut block The two nut blocks 77 are respectively arranged at the upper end of the front side of the slider 71. The middle parts of the two nut blocks 77 are threadedly connected with a plum blossom bolt 76. The nut block 77 provides an installation position for other parts. The two plum blossom bolts 76 are respectively arranged in cooperation with the longitudinal corresponding pressure strips 74. When the plum blossom bolts 76 are tightened, the plum blossom bolts 76 contact the pressure strips 74, limiting the pressure strips 74 from moving out from the inside of the arc groove 73, thereby ensuring the locking state of the rotating arm 13. The control assembly 7 also includes a spring sheet 75. The spring sheets 75 are respectively arranged at the left and right ends of the nut blocks 77. The four spring sheets 75 are all arranged in cooperation with the longitudinal corresponding pressure strips 74. The slider 71 drives the pressure strip 74 and the spring sheet 75 to move synchronously. The pressure strip 74 slides out of the upper arc groove 73. At the same time, the pressure strip 74 moves forward along the sliding groove of the slider 71 to compress the spring sheet 75.

[0020] A method for using an electric high voltage test isolation device comprises the following steps: (S1: unfold the legs: pull the rotating arm 13 downward, the rotating arm 13 rotates in the opposite direction synchronously under the action of the gear 5 to unfold, the rotating arm 13 drives the slider 71 to slide downward along the column 1 through the connecting rod 72, the slider 71 drives the pressure strip 74 and the spring sheet 75 to move synchronously, the pressure strip 74 will gradually move to the inside of the arc groove 73 on the lower side, the spring sheet 75 is reset, and the rotating arm 13 is initially positioned. The rotating arm 13 is perpendicular to the column 1, and the plum bolt 76 is tightened to limit the movement of the pressure strip 74 to lock the rotating arm 13; (S2: Move: pull the column 1, and the column 1 moves under the support of the rotating arm 13 and the universal caster 6, and moves the diamond telescopic frame 2 to the electric high-voltage test isolation position; (S3: Expand and isolate: Pull the two columns 1 apart, the diamond telescopic frame 2 is stretched and expanded, and the angle of the diamond telescopic frame 2 changes during the expansion process. At the same time, the upper end of the diamond telescopic frame 2 drives the stud 3 to slide downward along the long sliding hole at the upper end of the side of the column 1. After expanding to the width of use, the plum nut 4 is tightened. The plum nut 4 will press the column 1 under the action of the stud 3, thereby realizing the finalization of the diamond telescopic frame 2, and the diamond telescopic frame 2 isolates the high-voltage test site; (S4: Extend and position: Push the handle 10 downward, the handle 10 drives the rotating disk 8 to rotate, the circular shaft at the upper end of the support seat 12 slides relative to the arc groove 73, and when the circular shaft moves to the inside of the bayonet at one end of the arc groove 73 away from the rotation center of the rotating disk 8, the rotating disk 8 is self-locked, the support seat 12 is level with the lowest point of the universal caster 6 and contacts the ground at the same time, the support seat 12 increases the friction with the ground, and limits the movement of the diamond telescopic frame 2; (S5: Folding and storage: After use, the support seat 12 is controlled to retract upward, the diamond-shaped telescopic frame 2 is closed, and after moving to the storage position, the rotating arm 13 is folded to reduce its own volume for easy storage.

[0021] The working principle of an electric high-voltage test isolation device and a method of using the present invention is as follows: when in use, the rotating arm 13 is pulled downward, and the rotating arm 13 rotates around the rotating shaft at the lower end of the column 1. The rotating arm 13 drives the other rotating arm 13 to rotate synchronously in the opposite direction through two meshing gears 5. The rotating arm 13 drives the slider 71 to slide downward along the column 1 through the connecting rod 72. The slider 71 drives the pressure strip 74 and the spring sheet 75 to move synchronously. The pressure strip 74 slides out of the arc groove 73 on the upper side. At the same time, the pressure strip 74 moves forward along the slide groove of the slider 71 to compress the spring sheet 75. As the rotating arm 13 is unfolded, the pressure strip 74 gradually moves to the inside of the arc groove 73 on the lower side, and the spring sheet 75 is reset, thereby preliminarily positioning the rotating arm 13. At this time, the rotating The arm 13 is perpendicular to the column 1, the universal caster 6 is in contact with the ground, and the plum bolt 76 is tightened at the same time. The plum bolt 76 is in contact with the pressure strip 74, limiting the pressure strip 74 from moving out of the inside of the arc groove 73, thereby ensuring the locking state of the rotating arm 13, and then pulling the column 1, the column 1 moves under the support of the rotating arm 13 and the universal caster 6. When the diamond telescopic frame 2 is moved to the isolation position of the electric high-voltage test, the two columns 1 are pulled apart, and the diamond telescopic frame 2 is stretched and unfolded. The diamond telescopic frame 2 is connected by connecting rods and pins to form a diamond structure. Multiple diamond structures of the same size are superimposed and can be freely extended and retracted using the parallelogram instability principle. The angle of the diamond telescopic frame 2 changes during the extension process, and the upper end of the diamond telescopic frame 2 drives the screw The column 3 slides downward along the long sliding hole at the upper end of the side of the column 1, and after it is expanded to the width of use, the plum nut 4 is tightened. The plum nut 4 will press the column 1 under the action of the stud 3, thereby realizing the shaping of the diamond-shaped telescopic frame 2, and the handle 10 is pulled downward, and the handle 10 drives the rotating disk 8 to rotate. The guide sliding hole 9 moves synchronously with the rotating disk 8, and the circular shaft at the upper end of the support seat 12 slides relative to the guide sliding hole 9, driving the support seat 12 to move downward. When the circular shaft moves to the end of the guide sliding hole 9 away from the rotation center of the rotating disk 8, the support seat 12 is flush with the lowest point of the universal caster 6 and contacts the ground at the same time, thereby limiting the movement of the column 1, and a bayonet is provided at the end of the guide sliding hole 9 away from the rotation center of the rotating disk 8, and the bayonet is close to the rotation center of the rotating disk 8, thereby The distance between the circular axis and the rotation center of the rotating disk 8 will be reduced. Therefore, when the rotating disk 8 rotates in the opposite direction, it is necessary to drive the column 1 to move upward under the support of the circular axis, and then the gravity of the column 1 can be used to limit the rotation of the rotating disk 8, which can achieve self-locking. Then, the construction is completed and the diamond telescopic frame 2 is used for isolation. After the work is completed, the handle 10 is pulled upward, and the handle 10 drives the rotating disk 8 to rotate, and the support seat 12 shrinks upward, and then the plum nut 4 is loosened, and the stud 3 can slide along the long sliding hole at the upper end of the side of the column 1, and then the diamond telescopic frame 2 can be folded and shrunk. After shrinkage, the plum nut 4 is tightened to lock it, and then the column 1 is pulled. The column 1 moves to the storage position under the support of the rotating arm 13 and the universal caster 6, and then the plum bolt 76 is loosened.The plum bolt 76 no longer restricts the movement of the pressure strip 74, and then the rotating arm 13 is pulled upward, and the rotating arm 13 is folded to the side of the column 1. The plum bolt 76 is tightened to lock the pressure strip 74 into the upper arc groove 73, and the rotating arm 13 is positioned, which can reduce its own volume and facilitate storage.

[0022] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electric high voltage test isolation device, characterized in that: It comprises a column (1) and a control component (7); Columns (1): There are two of them, a diamond-shaped telescopic frame (2) is installed between the two columns (1), the lower ends of the two columns (1) are slidably connected to a lockable support seat (12), the front and rear sides of the lower ends of the two columns (1) are rotatably connected to a rotating arm (13), the lower surfaces of the four rotating arms (13) are each provided with a universal caster (6) at one end away from the column (1), and the ends of the four rotating arms (13) close to the column (1) are each provided with a gear (5), and the two gears (5) corresponding to each other in the longitudinal direction are meshed and connected; Control component (7): used to control the positioning of the rotating arm (13).

2. The electric high voltage test isolation device according to claim 1, characterized in that: The control assembly (7) comprises a slider (71), a connecting rod (72), an arc groove (73) and a pressure strip (74). The sliders (71) are respectively slidably connected to the middle parts of the two columns (1). The lower ends of the sliders (71) are rotatably connected to the connecting rods (72). The lower ends of the two connecting rods (72) are rotatably connected to the vertically corresponding rotating arms (13). The upper ends of the front sides of the two sliders (71) are slidably connected to the pressure strip (74). The middle parts of the two columns (1) are each provided with four arc grooves (73). The four arc grooves (73) on the same column (1) are divided into two groups. The two arc grooves (73) in one group are horizontally arranged. The eight arc grooves (73) are all arranged in cooperation with the pressure strip (74) on the same column (1).

3. The electric high voltage test isolation device according to claim 2 is characterized in that: The control assembly (7) further comprises a plum blossom bolt (76) and a nut block (77), wherein the nut blocks (77) are respectively arranged at the upper end of the front side surface of the slider (71), and the middle parts of the two nut blocks (77) are both threadedly connected with the plum blossom bolt (76), and the two plum blossom bolts (76) are respectively arranged in cooperation with the longitudinally corresponding pressure strips (74).

4. The electric high voltage test isolation device according to claim 3 is characterized in that: The control assembly (7) further comprises spring sheets (75), wherein the spring sheets (75) are respectively arranged at the left and right ends of the nut block (77), and the four spring sheets (75) are all arranged in cooperation with the corresponding pressure strips (74) in the longitudinal direction.

5. The electric high voltage test isolation device according to claim 1, characterized in that: The rear ends of the uprights (1) are rotatably connected to rotating disks (8), the rear side surfaces of the two rotating disks (8) are provided with guide sliding holes (9), and the circular shafts at the upper ends of the two support seats (12) are slidably connected to the vertically corresponding guide sliding holes (9).

6. The electric high voltage test isolation device according to claim 5, characterized in that: It also comprises a handle (10), wherein there are two handles (10), and the two handles (10) are respectively arranged on the outer arc surfaces of the two rotating disks (8).

7. The electric high voltage test isolation device according to claim 5, characterized in that: A tension spring (11) is provided between the circular shaft and the protruding column in the middle of the column (1).

8. The electric high voltage test isolation device according to claim 1, characterized in that: The upper sides of the left and right ends of the rhombus-shaped telescopic frame (2) are provided with studs (3), the studs (3) are respectively slidably connected to the long sliding holes at the upper ends of the side surfaces of the uprights (1), and the ends of the two studs (3) away from the rhombus-shaped telescopic frame (2) are both threadedly connected with plum nuts (4).

9. A method for using an electric high voltage test isolation device, characterized in that: A power high voltage test isolation device according to any one of claims 1 to 8 is used, comprising the following steps: (S1: unfolding the legs: pull the rotating arm (13) downward, the rotating arm (13) rotates in the opposite direction synchronously under the action of the gear (5) to unfold, the rotating arm (13) drives the slider (71) to slide downward along the column (1) through the connecting rod (72), the slider (71) drives the pressure strip (74) and the spring sheet (75) to move synchronously, the pressure strip (74) will gradually move into the arc groove (73) on the lower side, the spring sheet (75) is reset, and the rotating arm (13) is initially positioned, the rotating arm (13) is perpendicular to the column (1), and the plum bolt (76) is tightened to limit the movement of the pressure strip (74) to lock the rotating arm (13); (S2: Moving: Pull the column (1), the column (1) moves under the support of the rotating arm (13) and the universal caster (6), and the diamond-shaped telescopic frame (2) is moved to the electric high-voltage test isolation position; (S3: Expand and isolate: pull the two columns (1) apart, the diamond-shaped telescopic frame (2) is stretched and expanded, and the angle of the diamond-shaped telescopic frame (2) changes during the expansion process. At the same time, the upper end of the diamond-shaped telescopic frame (2) drives the stud (3) to slide downward along the long sliding hole at the upper end of the side of the column (1). After expanding to the width to be used, the plum nut (4) is tightened. The plum nut (4) will press the column (1) under the action of the stud (3), thereby achieving the finalization of the diamond-shaped telescopic frame (2). The diamond-shaped telescopic frame (2) isolates the high-voltage test site; (S4: Extended positioning: Pull the handle (10) downward, the handle (10) drives the rotating disk (8) to rotate, the circular shaft at the upper end of the support seat (12) and the arc groove (73) slide relative to each other, when the circular shaft moves to the inside of the end of the arc groove (73) away from the rotation center of the rotating disk (8), the rotating disk (8) is self-locked, the support seat (12) and the lowest point of the universal caster (6) are aligned and contact the ground at the same time, the support seat (12) increases the friction with the ground, and limits the movement of the diamond telescopic frame (2); (S5: Folding and storage: After use, the support seat (12) is controlled to retract upward, the diamond-shaped telescopic frame (2) is closed, and after moving to the storage position, the rotating arm (13) is folded to reduce its own volume for easy storage.

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