An anti-interference ac digital high-voltage meter

Abstract

The application discloses an anti-interference AC digital high-voltage meter, and belongs to the technical field of voltage measurement. The device comprises a mounting base, a plurality of fixed plate bodies which can be unfolded outwardly and are telescopic are arranged at the bottom of the mounting base, an air compressor is arranged on the sidewall of the mounting base, the air compressor controls the telescopic movement of the fixed plate bodies, a high-voltage digital meter is arranged at the upper end of the mounting base, the air compressor is started, an electromagnetic valve is opened, the gas in the adjusting air bag is introduced into the inside of the air inlet manifold, the electromagnetic four-way valve is connected with the air inlet hose on the side fixed plate body which needs to be adjusted, so that the gas is introduced into the sliding groove in the inside of the fixed plate body which needs to be adjusted, the sliding plate body is moved upward, and then the level of the mounting base can be adjusted, so that it is easier to observe the detection data on the screen of the high-voltage digital meter when the device is used.

Description

Technical Field

[0001] This invention belongs to the field of voltage measurement technology, and more specifically, relates to an anti-interference digital high voltage AC meter. Background Technology

[0002] The high-voltage digital voltmeter is a resistive-capacitive equipotential shielded voltage divider type high-voltage measuring device. It is mainly used for measuring pulse high voltage, lightning high voltage, and power frequency high voltage. It is the preferred replacement for a high-voltage electrostatic voltmeter. It features simple operation, intuitive display, high accuracy, small size, and light weight, making it an ideal piece of equipment for high-voltage measurement in power plants, substations, high-voltage electrical equipment manufacturing plants, and high-voltage testing laboratories.

[0003] Currently, existing technology, patent application number: 202122419176.9, discloses a high-voltage digital meter. Four piles are inserted or buried underground. The insertion depth of each pile is adjusted to keep the base level. Then, the fixed end is embedded into the fixed groove of the base. A hand-tightening screw is rotated into the threaded hole. During rotation, the shaft on the hand-tightening screw pushes the connecting ring upwards. The connecting ring drives the hinge rod to pull the four piles closer together to grip the soil and improve stability. The hand-tightening screw connection continues to rotate until it can no longer be turned by hand. By operating the hand-tightening screw, the fixed end can be fixed simultaneously, and the piles can be pulled closer together, making installation quick and convenient.

[0004] The aforementioned existing technology also has the following drawbacks: After the device is installed on the ground, if the ground is not level, the screen of the digital high voltage meter will tilt, making it difficult for the operator to view the value of the digital high voltage meter. As a result, the operator needs to use shims or other materials to level the digital high voltage meter. This method of leveling is extremely inconvenient, and it is difficult to find materials of suitable thickness to raise the meter during adjustment. Furthermore, the raised device is not stable enough. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] An anti-interference AC digital high-voltage meter includes a high-voltage digital meter with a mounting base at its bottom. The high-voltage digital meter has a screen and an interface. An air compressor is mounted on the outer wall of the mounting base. A mounting protrusion is mounted on the bottom of the mounting base. The outer wall of the mounting protrusion has multiple rotating mounting slots. A rotating shaft is rotatably connected inside each rotating mounting slot. A sliding plate is connected to the outer wall of each rotating shaft. A fixed plate is slidably connected to the outside of each sliding plate. A sliding groove is provided inside each fixed plate. A second through hole is provided near the bottom of the inner wall of each sliding groove. The air compressor inflates and controls the extension of each sliding plate inside the fixed plate. Each rotating shaft rotates adaptively inside each rotating mounting slot.

[0008] Preferably, an air intake manifold is installed at the air outlet end of the air compressor, and an electromagnetic four-way valve is installed at the end of the air intake manifold. Air intake hoses are installed at other interfaces of the electromagnetic four-way valve. Each air intake hose is connected to each second through hole. The electromagnetic four-way valve controls the connection between the air intake manifold and each air intake hose, thereby allowing gas to enter the interior of the sliding groove through the air intake hose to control the extension and retraction of the sliding plate.

[0009] Preferably, the mounting base has an internal mounting chamber, and an adjusting airbag is installed inside the mounting chamber. The upper end of the adjusting airbag is connected to the top inner side of the mounting chamber, and the adjusting airbag is connected to the air outlet of the air compressor. A limiting plate is installed at the bottom of the adjusting airbag, and the limiting plate is connected to the upper end of the mounting protrusion. A third through hole penetrating the mounting protrusion and the limiting plate is provided at the center of the mounting protrusion. A solenoid valve is installed on the air intake manifold, and the air intake manifold passes through the third through hole and connects to the adjusting airbag. The air compressor inflates the adjusting airbag, causing the limiting plate and the mounting protrusion to move downward inside the mounting chamber.

[0010] Preferably, one end of a rotary spring is connected to the outer wall at both ends of each rotating shaft, and the other end of each rotary spring is connected to the inner wall of the adjacent rotating mounting groove. The rotary spring causes each rotating shaft to have an outward force that drives the sliding plate and the fixed plate.

[0011] Preferably, the bottom of the mounting base is provided with a bottom mounting ring seat, the bottom of the mounting base is provided with an annular groove, and the upper end of the bottom mounting ring seat is provided with a plug ring. The plug ring is rotatably connected to the inside of the annular groove. Rotating the mounting base adjusts the screen direction of the high voltage digital meter.

[0012] Preferably, the bottom of the mounting base is provided with a second curved surface, and the upper end of the bottom mounting ring seat near the outer wall is provided with a first curved surface. The first curved surface and the second curved surface form an inwardly concave curve. The bottom of the bottom mounting ring seat is connected to multiple support legs, and the bottom of each support leg is connected to a caster wheel. Each support leg is located in the gap between every two fixed plates.

[0013] Preferably, the inner wall of the bottom mounting ring seat is provided with a limiting flange, and the limiting plate moves downward inside the mounting chamber to contact the limiting flange.

[0014] Preferably, the upper end of the mounting base is provided with a recessed mounting groove, and the high-voltage digital meter is located inside the recessed mounting groove.

[0015] Preferably, the upper end of the mounting base is connected to protective side plates on both sides of the recessed mounting groove, and the top of the two protective side plates is connected to a pointed block. The outer wall of the mounting base is provided with an embedded mounting groove, and the interior of the embedded mounting groove is provided with a first through hole communicating with the mounting chamber. An air compressor is installed inside the embedded mounting groove, and the air outlet of the air compressor is inserted into the first through hole. The pointed block guides the rainwater to both sides.

[0016] Preferably, a terminal block is installed on the upper end of the mounting base, and a connecting wire is installed on the terminal block. The connecting wire is connected to the interface on the high voltage digital meter. A connection socket is provided on the terminal block, and the connection socket is connected to an external wire.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The air compressor inflates the regulating airbag, causing it to expand. As the airbag expands, the limiting plate moves downwards and is stopped by the limiting flange. This lifts each fixed plate, causing each caster wheel to detach from the ground. The mounting protrusion moves with the limiting plate and, through the rotating shaft and sliding plate, drives the fixed plate downwards. When the rotating shaft and rotary spring are outside the bottom mounting ring, the rotational force of the multiple rotary springs causes each rotating shaft to rotate the sliding plate and fixed plate outwards. This allows the portion between the two semi-circular surfaces at the bottom of each fixed plate to support the ground. If the ground is uneven, the air compressor is restarted, and the solenoid valve opens, allowing gas from inside the regulating airbag to enter the intake manifold. The solenoid four-way valve connects the intake manifold to the intake hose on the fixed plate to be adjusted, allowing gas to enter the sliding groove inside the fixed plate to be adjusted, moving the sliding plate upwards and thus adjusting the level of the mounting base. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an anti-interference AC digital high voltage meter according to the present invention; Figure 2 This is a schematic diagram of the mounting base structure in this invention; Figure 3 In this invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a cross-sectional view of the mounting base in this invention; Figure 5 In this invention Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the air compressor structure in this invention; Figure 7 This is a schematic diagram of the fixed plate structure in this invention; Figure 8 In this invention Figure 7 Enlarged structural diagram at point C; Figure 9 This is a schematic cross-sectional view of the fixed plate structure in this invention; Figure 10 This is a schematic diagram of the top view of the fixed plate structure in this invention.

[0019] The correspondence between the labels and component names in the attached figures is as follows: 100. Mounting base; 101. Embedded mounting groove; 102. First through hole; 103. Protective side plate; 104. Pointed top block; 105. Bottom mounting ring seat; 106. Support leg; 107. Caster wheel; 108. Mounting compartment; 109. Limiting flange; 110. Recessed mounting groove; 111. Insertion ring; 112. Annular groove; 113. First curved surface; 114. Second curved surface; 200. High-voltage digital meter; 201. Connecting wire; 202. Terminal block; 203. Connecting socket; 300. Fixed plate; 301. Semi-circular surface; 302. Sliding plate; 303. Rotating shaft; 304. Rotary spring; 305. Second through hole; 306. Sliding groove; 307. Intake hose; 308. Solenoid four-way valve; 309. Intake manifold; 310. Solenoid valve; 400. Air compressor; 401. Adjustable air bag; 402. Limiting plate; 403. Mounting protrusion; 404. Rotary mounting groove; 405. Third through hole. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used 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 different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. The present invention provides the following embodiments.

[0023] like Figure 1 As shown, this is a schematic diagram of an anti-interference AC digital high voltage meter according to a preferred embodiment of the present invention. This embodiment of the anti-interference AC digital high voltage meter includes a mounting base 100. Multiple fixed plates 300 that can expand and retract are mounted on the bottom of the mounting base 100. An air compressor 400 is mounted on the side wall of the mounting base 100, controlling the expansion and contraction of the fixed plates 300. A high voltage digital meter 200 is mounted on the upper end of the mounting base 100. In this embodiment, the expansion and contraction of the multiple fixed plates 300 is achieved by the air compressor 400 filling and releasing air inside. When the multiple fixed plates 300 extend, they can automatically expand outwards to contact the ground, increasing the stability of the equipment. The height of the high voltage digital meter 200, mounted on the upper end of the mounting base 100, can be adjusted according to the expansion and contraction of the multiple fixed plates 300.

[0024] like Figure 2 As shown, this is a schematic diagram of the mounting base structure in this embodiment. The upper end of the mounting base 100 is fixedly connected to symmetrical protective side plates 103, and the upper end of the protective side plates 103 is fixedly connected to a pointed block 104. The high voltage digital meter 200 is located at the bottom of the two protective side plates 103 and the pointed block 104. In this embodiment, the protective side plates 103 and the pointed block 104 can protect the internal high voltage digital meter 200, preventing damage when the equipment is tilted. The pointed block 104 can disperse rainwater from both sides and flow downwards on rainy days, thereby keeping the high voltage digital meter 200 dry and preventing water ingress and damage.

[0025] The bottom of the mounting base 100 is equipped with a bottom mounting ring seat 105. The bottom of the bottom mounting ring seat 105 is detachably connected to a plurality of support legs 106. The bottom of each support leg 106 is detachably connected to a caster wheel 107. Each support leg 106 is located in the gap between every two fixed plates 300. In this embodiment, the caster wheel 107 can move the equipment when the multiple fixed plates 300 are not extended. When the multiple fixed plates 300 are extended, the length of the multiple fixed plates 300 is greater than the length of the support legs 106, thereby causing the caster wheel 107 to leave the ground and cooperate with the multiple extended fixed plates 300 to support the equipment.

[0026] like Figure 2 and4 As shown, this is a cross-sectional view of the mounting base in this embodiment. The mounting base 100 has a mounting chamber 108 inside, and an embedded mounting groove 101 on the outer wall of the mounting base 100. The embedded mounting groove 101 has a first through hole 102 passing through the mounting chamber 108. The air compressor 400 is installed inside the embedded mounting groove 101 and its pipe is inserted into the first through hole 102. The inner wall of the bottom mounting ring seat 105 is fixedly connected to a limiting flange 109. The upper end of the mounting base 100 is provided with a recessed mounting groove 110 at the position of the pointed block 104. The high-voltage digital meter 200 is inserted into the recessed mounting groove 110. In this embodiment, the air compressor 400 controls the extension and retraction of multiple fixed plates 300. The high-voltage digital meter 200 installed inside the recessed mounting groove 110 makes the high-voltage digital meter 200 more stable at the upper end of the mounting base 100 when the equipment is tilted.

[0027] like Figure 4-5 As shown, this is the embodiment of the present invention. Figure 4 The enlarged structural diagram at point B shows that the bottom of the mounting base 100 has an annular groove 112, and the upper end of the bottom mounting ring seat 105 is fixedly connected to a plug ring 111. The plug ring 111 is inserted into the annular groove 112 and rotated. The upper end of the bottom mounting ring seat 105 near the outer wall has a first curved surface 113, and the bottom of the mounting base 100 near the mounting chamber 108 has a second curved surface 114. The second curved surface 114 and the first curved surface 113 form an inwardly concave curve. In this embodiment, the mounting base 100 and the bottom mounting ring seat 105 are rotatably connected by the plug ring 111 and the annular groove 112, which allows the screen orientation of the high voltage digital meter 200 to be adjusted during use. Furthermore, the curve formed by the first curved surface 113 and the second curved surface 114 makes it easy to grip with fingers when moving or lifting the device, thus making movement more convenient.

[0028] like Figure 3 As shown, this is the embodiment of the present invention. Figure 2 The enlarged structural diagram at point A shows that the high-voltage digital meter 200 is equipped with a screen and an interface. The interface of the high-voltage digital meter 200 is connected to a terminal block 202. The upper end of the terminal block 202 is provided with a connection socket 203, which is detachably connected to the upper end of the mounting base 100. In this embodiment, the connection wire 201 is inserted into the interface of the high-voltage digital meter 200, and the connection is made to the outside through the connection socket 203. This reduces the number of times the interface of the high-voltage digital meter 200 is plugged in and unplugged, thereby increasing the service life of the high-voltage digital meter 200 and facilitating the replacement of the terminal block 202.

[0029] like Figure 6As shown, this is a schematic diagram of the air compressor structure in this embodiment. An adjusting airbag 401 is installed at the air outlet of the air compressor 400. The adjusting airbag 401 is installed inside the mounting chamber 108, and its upper surface is detachably connected to the upper surface of the mounting chamber 108. A limiting plate 402 is detachably connected to the bottom of the adjusting airbag 401. A mounting protrusion 403 is fixedly connected to the bottom of the limiting plate 402. Multiple rotating mounting grooves 404 are provided on the outer wall of the mounting protrusion 403. At the center of the bottom of the mounting protrusion 403... A third through hole 405 is provided, which penetrates the mounting protrusion 403 and the limiting plate 402. In this embodiment, the mounting groove 404 is used to install and fix the plate 300. The air compressor 400 inflates or deflates the adjusting airbag 401, and the tabs cause the adjusting airbag 401 to expand or contract. This allows the limiting plate 402 to move up and down inside the mounting chamber 108. The limiting plate 402 and the limiting flange 109 can achieve a limiting effect, thereby preventing the limiting plate 402 from falling out of the mounting chamber 108.

[0030] like Figure 7 As shown, this is a schematic diagram of the fixed plate structure in this embodiment. Each fixed plate 300 has a semi-circular surface 301 inclined towards the middle on both sides of its bottom. Each fixed plate 300 has a sliding plate 302 installed inside. In this embodiment, multiple fixed plates 300 form a ring when contracted, and when unfolded, they can be supported by contacting the ground at the middle of the semi-circular surfaces 301 on both sides of the bottom of each fixed plate 300, thereby enabling the equipment to be placed stably on the ground.

[0031] like Figure 8 As shown, this is the embodiment of the present invention. Figure 7 The enlarged structural diagram at point C shows that each sliding plate 302 extends beyond the fixed plate 300 and is fixedly connected to a rotating shaft 303. Each rotating shaft 303 is rotatably connected inside each rotating mounting groove 404, and a rotary spring 304 is sleeved on the outer wall at both ends of each rotating shaft 303. One end of each rotary spring 304 is fixedly connected to the outer wall of the rotating shaft 303, and the other end of each rotary spring 304 is fixedly connected to the inner wall of the adjacent rotating mounting groove 404. The rotary spring 304 causes each rotating shaft 302 to rotate... 03 There is an outward rotational force. In this embodiment, the rotational spring 304 enables each rotating shaft 303 to drive each sliding plate 302 and fixed plate 300 to have an outward rotational force. The fixed plate 300 can support the equipment by unfolding outward, and when it is retracted, the contact between the outer wall of the fixed plate 300 and the limiting flange 109 enables it to move inward after retraction. This allows multiple fixed plates 300 to form a ring, making the equipment occupy less space and more convenient to carry when moving it.

[0032] like Figure 9As shown, this is a cross-sectional view of the fixed plate structure in this embodiment. Each fixed plate 300 has a sliding groove 306 inside, and each sliding plate 302 is slidably connected to the inside of each sliding groove 306. Furthermore, the inner wall of the sliding groove 306 on each fixed plate 300 near the bottom is provided with a connection to the inside of the sliding groove 306. In this embodiment, the sliding plate 302 can slide up and down inside the sliding groove 306 through the sliding groove 306. The second through hole 305 allows the air compressor 400 to pressurize the interior, thereby enabling the adjustment of the high-pressure digital meter 200. The height can be adjusted by individually adjusting the extension and retraction of one or two sliding plates 302 inside the fixed plates 300. This solves the problem in the prior art where the screen of the digital high voltage meter tilts when the ground is not level, making it difficult for operators to view the value of the digital high voltage meter. As a result, operators need to use shims or other materials to level the digital high voltage meter, which is extremely inconvenient. Furthermore, it is difficult to find materials of suitable thickness to raise the meter during adjustment, and the raised equipment is not stable.

[0033] like Figure 10 As shown, this is a top view schematic diagram of the fixed plate structure in this embodiment. Each fixed plate 300 has a second through hole 305 on its inner wall that is detachably connected to an air intake hose 307. There are three fixed plates 300 and three sliding plates 302. The ends of the three air intake hoses 307 are connected to three ports on a solenoid four-way valve 308. The fourth port on the solenoid four-way valve 308 is detachably connected to an air intake manifold 309. The air intake manifold 309 is inserted into the third through hole 405 and detachably connected to the adjusting airbag 401. A solenoid valve is installed on the air intake manifold 309. 310. In this embodiment, by opening the solenoid valve 310, when the air compressor 400 inflates the regulating air bag 401, the gas enters the interior of the intake manifold 309 through the solenoid valve 310. By controlling the fourth interface of the solenoid four-way valve 308 to connect with the other three interfaces, the gas can enter the sliding groove 306 inside a fixed plate 300, pushing the sliding plate 302 upward. Then, in conjunction with the rotating shaft 303 and the rotating mounting groove 404, the level of the high-pressure digital meter 200 can be adjusted.

[0034] In summary, the specific usage of this embodiment is as follows: During use, the high-voltage digital meter 200 is first inserted between the two protective side plates 103 and placed inside the recessed mounting groove 110. The pointed top block 104 and the protective side plates 103 protect the high-voltage digital meter 200. Furthermore, the pointed top block 104 guides rainwater to both sides during rain, preventing damage to the high-voltage digital meter 200 and increasing its service life. The universal wheels 107, in conjunction with the support legs 106, support the device and facilitate movement. The connecting wire 201 is inserted into the connection port on the high-voltage digital meter 200. The connection to external wires can be achieved through the connection socket 203 on the terminal plate 202, thereby reducing the risk of high voltage damage. The number of plugging and unplugging cycles of the interface on the digital meter 200 increases the service life of the high-voltage digital meter 200. During equipment installation, the air compressor 400 is started to inflate the regulating airbag 401. As the regulating airbag 401 inflates, the limiting plate 402 moves downwards inside the mounting chamber 108 and is limited by the limiting flange 109. At this time, each fixed plate 300 lifts the equipment, causing each caster wheel 107 to leave the ground. During the downward movement of the limiting plate 402, the mounting protrusion 403 moves along with it and, through the rotating shaft 303 and the sliding plate 302, drives the fixed plate 300 downwards. When the rotating shaft 303 and the rotary spring 304 are outside the bottom mounting ring 105, multiple rotary springs 30... The rotational force of 4 causes each rotating shaft 303 to drive the sliding plate 302 and the fixed plate 300 to rotate outward, thereby enabling the part between the two semi-circular surfaces 301 at the bottom of each fixed plate 300 to be supported by the ground. At this time, each support leg 106 is located in the gap between each fixed plate 300. When the ground is not flat, the air compressor 400 is restarted and the solenoid valve 310 is opened to allow the gas inside the regulating air bag 401 to enter the air intake manifold 309. By adjusting the solenoid four-way valve 308, the air intake manifold 309 is connected to the air intake hose 307 on the fixed plate 300 that needs to be adjusted, thereby allowing the gas to enter the sliding groove 306 inside the fixed plate 300 that needs to be adjusted, thus moving the sliding plate 300. The upward movement of the plate 302 allows for adjustment of the level of the mounting base 100, making the screen on the high-voltage digital meter 200 easier to see. Furthermore, the extension of multiple sliding plates 302 adjusts the height of the high-voltage digital meter 200 driven by the mounting base 100. The rotatable connection between the bottom mounting ring 105 and the mounting base 100 allows the mounting base 100 to be rotated after installation, changing the orientation of the screen on the high-voltage digital meter 200 and making it easier to read the values ​​on the screen. Additionally, the curved shape formed by the first curved surface 113 and the second curved surface 114 on the mounting base 100 and the bottom mounting ring 105 allows for easier finger placement on the second curved surface 114 during movement, facilitating further movement.

[0035] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. An anti-interference AC digital high voltage meter, comprising a high voltage digital meter (200), a mounting base (100) installed at the bottom of the high voltage digital meter (200), and a screen and interface provided on the high voltage digital meter (200), characterized in that, An air compressor (400) is installed on the outer wall of the mounting base (100). A mounting protrusion (403) is installed on the bottom of the mounting base (100). Multiple rotating mounting slots (404) are provided on the outer wall of the mounting protrusion (403). A rotating shaft (303) is rotatably connected inside the rotating mounting slot (404). A sliding plate (302) is connected to the outer wall of each rotating shaft (303). A fixed plate (300) is slidably connected to the outside of each sliding plate (302). A sliding groove (306) is provided inside each fixed plate (300). A second through hole (305) is provided at the bottom of each sliding groove (306) near the inner wall of the fixed plate (300). The air compressor (400) inflates and controls each sliding plate (302) to extend inside the fixed plate (300). Each rotating shaft (303) rotates adaptively inside each rotating mounting slot (404). Each rotating shaft (303) has one end of a rotary spring (304) connected to the outer wall at both ends. The other end of each rotary spring (304) is connected to the inner wall of the adjacent rotating mounting groove (404). The rotary spring (304) causes each rotating shaft (303) to have an outward force that drives the sliding plate (302) and the fixed plate (300).

2. The anti-interference AC digital high voltage meter according to claim 1, characterized in that, An air compressor (400) is equipped with an air intake manifold (309) at its outlet end. An electromagnetic four-way valve (308) is installed at the end of the air intake manifold (309). An air intake hose (307) is installed at the other interfaces of the electromagnetic four-way valve (308). Each air intake hose (307) is connected to each second through hole (305). The electromagnetic four-way valve (308) controls the connection between the air intake manifold (309) and each air intake hose (307), thereby allowing gas to enter the interior of the sliding groove (306) through the air intake hose (307) and control the extension and retraction of the sliding plate (302).

3. The anti-interference AC digital high voltage meter according to claim 2, characterized in that, The mounting base (100) has an internal mounting chamber (108), and an adjusting airbag (401) is installed inside the mounting chamber (108). The upper end of the adjusting airbag (401) is connected to the inner top of the mounting chamber (108), and the adjusting airbag (401) is connected to the air outlet of the air compressor (400). A limiting plate (402) is installed at the bottom of the adjusting airbag (401), and the limiting plate (402) is connected to the upper end of the mounting protrusion (403). 3) A third through hole (405) is provided at the center, penetrating the mounting protrusion (403) and the limiting plate (402). A solenoid valve (310) is installed on the air intake manifold (309). The air intake manifold (309) passes through the third through hole (405) and is connected to the regulating air bag (401). The air compressor (400) inflates the regulating air bag (401), causing the limiting plate (402) and the mounting protrusion (403) to move downward inside the mounting chamber (108).

4. The anti-interference AC digital high voltage meter according to claim 3, characterized in that, The bottom of the mounting base (100) is provided with a bottom mounting ring seat (105), and the bottom of the mounting base (100) is provided with an annular groove (112). The upper end of the bottom mounting ring seat (105) is provided with a plug ring (111). The plug ring (111) is rotatably connected to the inside of the annular groove (112). Rotating the mounting base (100) adjusts the screen direction of the high voltage digital meter (200).

5. The anti-interference AC digital high voltage meter according to claim 4, characterized in that, The bottom of the mounting base (100) is provided with a second curved surface (114), and the upper end of the bottom mounting ring seat (105) near the outer wall is provided with a first curved surface (113). The first curved surface (113) and the second curved surface (114) form an inwardly concave curve. The bottom of the bottom mounting ring seat (105) is connected to multiple support legs (106), and the bottom of each support leg (106) is connected to a universal wheel (107). Each support leg (106) is located in the gap between every two fixed plates (300).

6. The anti-interference AC digital high voltage meter according to claim 5, characterized in that, The inner wall of the bottom mounting ring seat (105) is provided with a limiting flange (109), and the limiting plate (402) moves downward inside the mounting chamber (108) to contact the limiting flange (109).

7. The anti-interference AC digital high voltage meter according to any one of claims 1-6, characterized in that, The upper end of the mounting base (100) is provided with a recessed mounting groove (110), and the high voltage digital meter (200) is located inside the recessed mounting groove (110).

8. The anti-interference AC digital high voltage meter according to claim 7, characterized in that, The upper end of the mounting base (100) is connected to the protective side plate (103) on both sides of the recessed mounting groove (110). The top of the two protective side plates (103) is connected to the pointed block (104). The outer wall of the mounting base (100) is provided with an embedded mounting groove (101). The interior of the embedded mounting groove (101) is provided with a first through hole (102) that communicates with the mounting chamber (108). The air compressor (400) is installed inside the embedded mounting groove (101). The air outlet of the air compressor (400) is inserted into the first through hole (102). The pointed block (104) guides the rainwater to both sides.

9. The anti-interference AC digital high voltage meter according to claim 8, characterized in that, A terminal block (202) is installed on the upper end of the mounting base (100). A connecting wire (201) is installed on the terminal block (202). The connecting wire (201) is connected to the interface on the high voltage digital meter (200). A connection socket (203) is provided on the terminal block (202). The connection socket (203) is connected to the external wire.

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