High-voltage electric energy metering cabinet with multi-stage protection structure

Abstract

The invention discloses a high-voltage electric energy metering cabinet with a multi-stage protection structure, and relates to the technical field of high-voltage electric energy metering cabinets. The electric energy metering cabinet comprises an electric energy metering cabinet body. A plurality of working cabinets are fixed in the electric energy metering cabinet body. A sealing groove is formed in one side of the working cabinet, a pin shaft is fixed to one side of the working cabinet, and a cabinet door is fixed to the outer side of the pin shaft. A sealing strip is fixed on the inner wall of the cabinet door; a pressure sensor is fixed in the working cabinet, and the rear side of the working cabinet is connected with an air pump through a first air pipe. Filtered nitrogen is filled into the working cabinet from the nitrogen storage tank through the sucking pump, the air pressure in the cabinet is kept in a micro-positive pressure state slightly higher than the outside, the air pressure difference can prevent external humid air from permeating through tiny gaps, the working cabinet is particularly suitable for long-term outdoor operation scenes, the chemical property of the nitrogen is stable, the humid air in the cabinet can be replaced, and the service life of the working cabinet is prolonged. An inert environment is formed, oxidation and corrosion processes of electrical elements caused by moisture are delayed, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This invention belongs to the technical field of high-voltage power metering cabinets, and in particular relates to a high-voltage power metering cabinet with a multi-level protection structure. Background Technology

[0002] With the continuous development of power systems, high-voltage power metering cabinets, as crucial equipment for metering and monitoring electrical energy, are facing increasingly critical challenges in terms of the stability and safety of their operating environment. High-voltage power metering cabinets are typically installed outdoors or semi-outdoors, facing various complex climatic conditions such as high temperature, high humidity, dust, and corrosive gases. These adverse factors not only affect the normal operation of the power metering cabinet but may also damage internal electrical components, thereby impacting the stability and metering accuracy of the power system.

[0003] Traditional high-voltage power metering cabinets, although designed and manufactured with certain sealing measures in mind, are prone to leaks due to material aging and wear of seals during long-term use. In addition, if the high-voltage power metering cabinet is under low-voltage conditions for a long time, external moisture and dust can enter the cabinet, affecting the insulation performance and lifespan of electrical components. Summary of the Invention

[0004] The purpose of this invention is to provide a high-voltage power metering cabinet with a multi-level protection structure. Filtered nitrogen is pumped into the cabinet from a nitrogen storage tank using an air pump, maintaining the internal pressure at a slightly higher positive pressure than the external pressure. This pressure difference prevents external humid air from seeping in through tiny gaps, making it particularly suitable for long-term outdoor operation. It provides reliable protection for the safe operation of high-voltage power metering equipment in harsh environments such as high humidity and dust. This invention solves the problem that existing high-voltage power metering cabinets often experience sealing failures due to material aging and seal wear during long-term use. Furthermore, if the high-voltage power metering cabinet is under low pressure for extended periods, external moisture and dust can enter the cabinet, affecting the insulation performance and lifespan of electrical components.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-voltage power metering cabinet with a multi-level protection structure includes a power metering cabinet body, and several working cabinets are fixed inside the power metering cabinet body.

[0007] A sealing groove is opened on one side of the work cabinet, a pin is fixed on one side of the work cabinet, and a cabinet door is fixed on the outside of the pin.

[0008] A sealing strip is fixed to the inner wall of the cabinet door;

[0009] A pressure sensor is fixed inside the work cabinet, and an air pump is connected to the rear of the work cabinet through a first air pipe.

[0010] The input end of the air pump is connected to a filter box via a second air pipe, and the filter box is connected to a nitrogen storage tank via a third air pipe.

[0011] The top of the filter box has a mounting slot, and a filter plate is movably connected inside the mounting slot;

[0012] A mounting plate is fixed to the top of the filter plate;

[0013] Positioning strips are fixed on both sides of the filter plate, and a filter screen is fixed in the center of the filter plate.

[0014] The present invention is further configured such that: a limiting strip is fixed inside the filter box, and a protective strip is fixed on the inner wall of the limiting strip;

[0015] The protective strip is made of rubber.

[0016] The present invention is further configured such that both the limiting strip and the positioning strip are "L" shaped structures, and the limiting strip and the positioning strip are arranged intersectingly;

[0017] A baffle is fixed to the bottom of the inner wall of the filter box.

[0018] The present invention is further configured such that: both sides of the mounting plate are fixed with fixing plates, and the surface of the fixing plates is provided with positioning holes.

[0019] The present invention is further configured such that: limit plates are fixed on both sides of the outer wall of the filter box, and a first tension spring is fixed on one side of the limit plate;

[0020] An adjusting plate is fixed to one end of the first tension spring, and a locking rod is fixed to one side of the adjusting plate;

[0021] The locking rod passes through the limiting plate, and one end of the locking rod is inserted into the positioning hole.

[0022] The present invention is further configured such that: a connecting plate is fixed on one side of the work cabinet, and a bearing is fixed on one side of the connecting plate;

[0023] A rotating rod is fixed to the inner ring of the bearing, and a movable plate is fixed to one end of the rotating rod.

[0024] The present invention is further configured such that: an extension plate is fixed on both sides of the movable plate, and a second tension spring is fixed on one side of the extension plate;

[0025] The second tension spring has a handle fixed to one end, and a fixing rod is fixed to one end of the handle;

[0026] The fixed rod passes through the movable plate.

[0027] The invention is further configured such that: a reinforcing block is fixed to the outside of the cabinet door, and a stabilizing hole is formed on the surface of the reinforcing block;

[0028] One end of the fixing rod is inserted into the stabilizing hole.

[0029] The present invention has the following beneficial effects:

[0030] 1. This invention utilizes a filter box to pump filtered nitrogen from a nitrogen storage tank into the work cabinet via an air pump, maintaining a slightly positive pressure inside the cabinet that is slightly higher than the outside pressure. This pressure difference prevents humid air from seeping in through tiny gaps, making it particularly suitable for long-term outdoor operation. Nitrogen's stable chemical properties allow it to displace humid air inside the cabinet, creating an inert environment that slows down the oxidation and corrosion of electrical components caused by moisture, thus extending the equipment's lifespan. The sealing strip on the inner wall of the cabinet door is embedded in the sealing groove of the work cabinet, forming a physical barrier that directly prevents external moisture and dust from entering the cabinet through door gaps, reducing the risk of direct contact between humid air and electrical components. This multi-layered moisture-proof design addresses the issues of insulation degradation and component damage caused by aging seals and humid environments in traditional metering cabinets, providing a reliable guarantee for the safe operation of high-voltage power metering equipment in harsh environments such as high humidity and dust.

[0031] 2. Through the action of the fixing rod, the tension of the second tension spring is transmitted to the fixing rod through the handle, forming a continuous pressing force on the cabinet door, ensuring that the cabinet door and the work cabinet fit tightly together; the elastic tension of the second tension spring keeps the fixing rod in a pressing state on the cabinet door at all times. Even if the sealing strip is slightly worn due to long-term use, the elastic deformation of the tension spring can still compensate for the gap, avoiding the cabinet door from loosening due to vibration or external force, and ensuring the long-term reliability of the physical seal.

[0032] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a high-voltage power metering cabinet with a multi-level protection structure according to the present invention.

[0035] Figure 2 This is a schematic diagram of the side view structure of the present invention.

[0036] Figure 3For the present invention Figure 2 Enlarged view of a portion of point A in the middle.

[0037] Figure 4 This is a schematic diagram of the internal structure of the work cabinet of the present invention.

[0038] Figure 5 This is a schematic diagram of the internal structure of the filter box of the present invention.

[0039] Figure 6 This is a schematic diagram of the external structure of the filter box of the present invention.

[0040] Figure 7 For the present invention Figure 6 Enlarged view of section B in the middle.

[0041] Figure 8 This is a schematic diagram of the filter structure of the present invention.

[0042] The attached diagram lists the components represented by each number as follows:

[0043] 1-Electricity metering cabinet body, 2-Work cabinet, 3-Sealing groove, 4-Pin shaft, 5-Cabinet door, 6-Sealing strip, 7-Pressure sensor, 8-Air pump, 9-Filter box, 10-Nitrogen storage tank, 11-Mounting groove, 12-Filter plate, 13-Mounting plate, 14-Positioning strip, 15-Filter screen, 16-Limiting strip, 17-Protective strip, 18-Stop strip, 19-Fixing plate, 20-Positioning hole, 21-Limiting plate, 22-First tension spring, 23-Adjusting plate, 24-Clamping rod, 25-Connecting plate, 26-Bearing, 27-Rotating rod, 28-Moving plate, 29-Extension plate, 30-Second tension spring, 31-Handle, 32-Fixing rod, 33-Reinforcing block, 34-Stabilizing hole. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0046] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0047] For a specific implementation example, please refer to Implementation Example 1. Figure 1-8 This invention relates to a high-voltage power metering cabinet with a multi-level protection structure, comprising a power metering cabinet body 1, inside which are fixed several working cabinets 2; a sealing groove 3 is opened on one side of the working cabinet 2, a pin 4 is fixed on one side of the working cabinet 2, and a cabinet door 5 is fixed on the outside of the pin 4; a sealing strip 6 is fixed on the inner wall of the cabinet door 5; a pressure sensor 7 is fixed inside the working cabinet 2, and a vacuum pump 8 is connected to the rear of the working cabinet 2 through a first air pipe; the input end of the vacuum pump 8 is connected to a filter box 9 through a second air pipe, and the filter box 9 is connected to a nitrogen storage tank 10 through a third air pipe; a mounting groove 11 is opened on the top of the filter box 9, and a filter plate 12 is movably connected inside the mounting groove 11; a mounting plate 13 is fixed on the top of the filter plate 12; positioning strips 14 are fixed on both sides of the filter plate 12, and a filter screen 15 is fixed in the center of the filter plate 12.

[0048] Specifically, a limit strip 16 is fixed inside the filter box 9, and a protective strip 17 is fixed on the inner wall of the limit strip 16; the protective strip 17 is made of rubber material.

[0049] Furthermore, both the limiting strip 16 and the positioning strip 14 are "L" shaped structures, and the limiting strip 16 and the positioning strip 14 are arranged in a cross pattern; a baffle strip 18 is fixed to the bottom of the inner wall of the filter box 9.

[0050] The operation process of this embodiment is as follows: After confirming that the sealing strip 6 inside the cabinet door 5 is intact, the cabinet door 5 is closed by rotating it using the pin 4, so that the sealing strip 6 is embedded in the sealing groove 3 of the work cabinet 2, forming a preliminary physical seal. The handle 31 is operated, and through the pulling force of the second tension spring 30, the fixing rod 32 passes through the moving plate 28 and is engaged in the stabilizing hole 34 of the reinforcing block 33, further locking the cabinet door and enhancing the sealing performance. The filter plate 12 is inserted along the mounting groove 11 at the top of the filter box 9, so that the "L"-shaped positioning strip 14 and the limiting strip 16 interlock. The bottom stop strip... 18. Further stabilize the filter plate 12 to ensure a secure installation; after fixing, the pressure sensor 7 detects the air pressure inside the work cabinet 2. If the air pressure drops, the nitrogen storage tank 10 is opened, and nitrogen is supplied to the filter box 9 through the third gas pipe. The nitrogen supply pipeline or gas cylinder may carry metal fragments, dust, and other particulate matter, and the undried nitrogen may contain trace amounts of water vapor. The filter screen 15 is an activated carbon mesh. After passing through the filter screen 15, the dust and moisture in the nitrogen are filtered out. Then, the nitrogen enters the vacuum pump 8 through the second gas pipe, and then passes through the first gas pipe. The nitrogen is introduced into the work cabinet 2, and the pressure sensor 7 is monitored. When the pressure inside the work cabinet 2 reaches the set value, the nitrogen storage tank 10 is closed. This device uses a vacuum pump 8 to inject filtered nitrogen from the nitrogen storage tank 10 into the work cabinet 2, maintaining the pressure inside the cabinet at a slightly positive pressure level higher than the outside pressure. This pressure difference prevents humid air from seeping in through tiny gaps, making it particularly suitable for long-term outdoor operation. Nitrogen has stable chemical properties and can displace humid air inside the cabinet, creating an inert environment and delaying oxidation and corrosion of electrical components caused by moisture. The process extends the service life of the equipment; the sealing strip 6 on the inner wall of the cabinet door 5 is embedded in the sealing groove 3 of the work cabinet 2, forming a physical barrier that directly blocks external moisture and dust from entering the cabinet through the gaps in the cabinet door, reducing the risk of direct contact between humid air and electrical components. The multiple moisture-proof protection design addresses the problems of insulation degradation and component damage caused by aging seals and humid environments in traditional metering cabinets from multiple angles, including physical barrier, air pressure control, and gas purification, providing a reliable guarantee for the safe operation of high-voltage power metering equipment in harsh environments such as high humidity and dust.

[0051] For a specific embodiment two, please refer to Figure 7 Based on the first specific embodiment, fixing plates 19 are fixed on both sides of the mounting plate 13, and positioning holes 20 are opened on the surface of the fixing plates 19.

[0052] Specifically, limit plates 21 are fixed on both sides of the outer wall of the filter box 9, and a first tension spring 22 is fixed on one side of the limit plate 21; an adjustment plate 23 is fixed on one end of the first tension spring 22, and a locking rod 24 is fixed on one side of the adjustment plate 23; the locking rod 24 passes through the limit plate 21, and one end of the locking rod 24 is inserted into the positioning hole 20.

[0053] The operation process of this embodiment is as follows: When the filter plate 12 needs to be installed, pull the adjusting plate 23 to compress the first tension spring 22, align the locking rod 24 with the positioning holes 20 of the fixing plates 19 on both sides of the mounting plate 13, release the adjusting plate 23, and use the elastic force of the first tension spring 22 to make the locking rod 24 lock into the positioning hole 20, fix the filter plate 12, and prevent it from loosening; when the filter plate 12 needs to be replaced or cleaned, pull the adjusting plate 23 to make the locking rod 24 disengage from the positioning hole 20, take out the filter plate 12, replace or clean the filter screen 15, and reinstall it; the rubber protective strip 17 inside the filter box 9 can buffer the installation impact of the filter plate 12, and at the same time enhance the seal to prevent unfiltered gas leakage.

[0054] For a specific embodiment three, please refer to Figure 1-3 Based on specific embodiment one and specific embodiment two, a connecting plate 25 is fixed on one side of the work cabinet 2, and a bearing 26 is fixed on one side of the connecting plate 25; a rotating rod 27 is fixed on the inner ring of the bearing 26, and a moving plate 28 is fixed on one end of the rotating rod 27.

[0055] Specifically, extension plates 29 are fixed on both sides of the movable plate 28, and a second tension spring 30 is fixed on one side of the extension plate 29; a handle 31 is fixed to one end of the second tension spring 30, and a fixing rod 32 is fixed to one end of the handle 31; the fixing rod 32 passes through the movable plate 28.

[0056] Furthermore, a reinforcing block 33 is fixed to the outside of the cabinet door 5, and a stabilizing hole 34 is opened on the surface of the reinforcing block 33; one end of the fixing rod 32 is inserted into the stabilizing hole 34.

[0057] The operation process of this embodiment is as follows: one end of the second tension spring 30 is connected to the extension plate 29, and the other end is connected to the handle 31. The fixing rod 32 passes through the moving plate 28 and is fixed to the handle 31. When the cabinet door 5 is closed, the handle 31 is pulled to move the fixing rod 32 towards the reinforcing block 33. The second tension spring 30 generates elastic tension due to stretching, so that the fixing rod 32 is tightly inserted into the stabilizing hole 34 of the reinforcing block 33. At this time, the tension of the second tension spring 30 is transmitted to the fixing rod 32 through the handle 31, forming a continuous pressing force on the cabinet door 5, ensuring that the cabinet door 5 and the work cabinet 2 are tightly fitted. The elastic tension of the second tension spring 30 keeps the fixing rod 32 pressed against the cabinet door 5. Even if the sealing strip 6 is slightly worn due to long-term use, the elastic deformation of the tension spring can still compensate for the gap, avoiding the cabinet door from loosening due to vibration or external force, and ensuring the long-term reliability of the physical seal.

[0058] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-voltage power metering cabinet with a multi-level protection structure, comprising a power metering cabinet body (1), characterized in that: The main body (1) of the power metering cabinet has several working cabinets (2) fixed inside. The work cabinet (2) has a sealing groove (3) on one side, a pin (4) is fixed on one side of the work cabinet (2), and a cabinet door (5) is fixed on the outside of the pin (4). A sealing strip (6) is fixed to the inner wall of the cabinet door (5); A pressure sensor (7) is fixed inside the work cabinet (2), and an air pump (8) is connected to the rear side of the work cabinet (2) through a first air pipe. The input end of the air pump (8) is connected to a filter box (9) through a second air pipe, and the filter box (9) is connected to a nitrogen storage tank (10) through a third air pipe. The top of the filter box (9) has an installation groove (11), and a filter plate (12) is movably connected inside the installation groove (11). The top of the filter plate (12) is fixed with an mounting plate (13); Positioning strips (14) are fixed on both sides of the filter plate (12), and a filter screen (15) is fixed in the center of the filter plate (12).

2. The high-voltage power metering cabinet with a multi-level protection structure according to claim 1, characterized in that, The filter box (9) has a fixed limit strip (16) inside, and a protective strip (17) is fixed on the inner wall of the limit strip (16). The protective strip (17) is made of rubber material.

3. A high-voltage power metering cabinet with a multi-level protection structure according to claim 2, characterized in that, Both the limiting strip (16) and the positioning strip (14) are "L" shaped structures, and the limiting strip (16) and the positioning strip (14) are arranged in a cross pattern; A baffle (18) is fixed to the bottom of the inner wall of the filter box (9).

4. A high-voltage power metering cabinet with a multi-level protection structure according to claim 1, characterized in that, The mounting plate (13) is fixed with fixing plates (19) on both sides, and the fixing plates (19) have positioning holes (20) on their surfaces.

5. A high-voltage power metering cabinet with a multi-level protection structure according to claim 4, characterized in that, Limiting plates (21) are fixed on both sides of the outer wall of the filter box (9), and a first tension spring (22) is fixed on one side of the limiting plate (21). An adjusting plate (23) is fixed to one end of the first tension spring (22), and a locking rod (24) is fixed to one side of the adjusting plate (23). The lever (24) passes through the limiting plate (21), and one end of the lever (24) is inserted into the positioning hole (20).

6. A high-voltage power metering cabinet with a multi-level protection structure according to claim 1, characterized in that, A connecting plate (25) is fixed on one side of the work cabinet (2), and a bearing (26) is fixed on one side of the connecting plate (25). The inner ring of the bearing (26) is fixed with a rotating rod (27), and a movable plate (28) is fixed at one end of the rotating rod (27).

7. A high-voltage power metering cabinet with a multi-level protection structure according to claim 6, characterized in that, Both sides of the movable plate (28) are fixed with extension plates (29), and a second tension spring (30) is fixed on one side of the extension plate (29). The second tension spring (30) has a handle (31) fixed at one end, and a fixing rod (32) is fixed at one end of the handle (31). The fixed rod (32) passes through the movable plate (28).

8. A high-voltage power metering cabinet with a multi-level protection structure according to claim 7, characterized in that, A reinforcing block (33) is fixed to the outside of the cabinet door (5), and a stabilizing hole (34) is opened on the surface of the reinforcing block (33). One end of the fixing rod (32) is inserted into the stabilizing hole (34).

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