Electric power meter with high voltage prevention structure

Abstract

The utility model discloses an electric power meter with a high-voltage-resistant structure, relates to the technical field of electric power meters, and aims to solve the problems that the electric power meter is usually mounted in equipment such as a power distribution cabinet, a switch cabinet and the like in the conventional shockproof base, and the space is narrow and small. The high-voltage module part of the electric power meter is usually connected with other electric power elements in the power distribution cabinet through wires, the high-voltage module is not easy to damage, and the low-voltage parts such as a control circuit and a display screen are easy to damage, so that when the electric power meter is overhauled, the whole electric power meter is inconvenient to disassemble and assemble. According to the utility model, the vulnerable low-voltage module and the difficult-to-disassemble high-voltage module of the electric power meter are separated, so that during maintenance, if problems only occur at the positions of the low-voltage module and the display screen, the high-voltage part and the whole electric power meter do not need to be disassembled and maintained, and the operation is simpler and more convenient.

Description

Technical Field

[0001] This utility model relates to the field of power meter technology, specifically to a power meter with a high-voltage protection structure. Background Technology

[0002] Power meters are intelligent measurement and control devices used for measuring power parameters, monitoring and analyzing power quality, and controlling electrical equipment. They play a crucial role in modern power systems and are widely used in various control systems, SCADA systems, energy management systems, substation automation, community power monitoring, industrial automation, intelligent buildings, intelligent distribution cabinets, switchgear, and other equipment.

[0003] Chinese Patent 98227026.7 discloses a high-voltage protection device for power meters. A varistor and a discharge tube are connected in series between the phase and neutral lines of the power meter. A resistor is connected in parallel with the varistor, and the breakdown voltage of the discharge tube is lower than the breakdown voltage of the varistor. The parameter of the parallel resistor R2 is 100-600 kΩ.

[0004] Chinese Patent 202223214341.8 discloses a power meter, comprising a power meter body and a mounting frame. Two sleeve blocks are slidably fitted onto the mounting frame, and the mounting frame is provided with a first locking element for locking the sleeve blocks. Assembly blocks are mounted on opposite sides of the two sleeve blocks, and each assembly block has a through hole. The power meter body has slots on both sides, and a first connecting rod is installed in each of the two slots. The two assembly blocks are respectively engaged in the two slots, and the two first connecting rods pass through the two openings. A second locking element is provided on each assembly block for locking the first connecting rod. Mounting brackets are mounted at both ends of the mounting frame, and openings are formed within the mounting brackets. Fixing rods located within the openings are mounted on the mounting brackets.

[0005] The two types of power meters mentioned above solve the problem of varistors aging due to long-term power supply and a certain number of pulse high-voltage loads, thus ensuring the reliable operation of the power instruments, and also solve the problem of the inconvenience of quick disassembly and assembly of the power instruments.

[0006] However, there are still problems. Power meters are usually installed inside equipment such as distribution cabinets and switch cabinets, where the space is relatively small. The high-voltage module of the power meter is usually connected to other power components inside the distribution cabinet by wires. Furthermore, the high-voltage module is not easy to damage, and maintenance usually involves the low-voltage modules such as its control circuit and display screen. Disassembling and reassembling the entire power meter during maintenance is inconvenient.

[0007] To address the aforementioned issues, a power meter with a high-voltage protection structure is proposed. Utility Model Content

[0008] The purpose of this utility model is to provide a power meter with a high-voltage protection structure, which solves the problem of inconvenient operation of disassembling and assembling the entire power meter during maintenance in the prior art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a power meter with a high-voltage protection structure, comprising a sliding ejection assembly, wherein the sliding ejection assembly comprises an electric telescopic push rod, wherein a push extrusion block is fixedly connected to the output end of the electric telescopic push rod, and a rotating shaft is fixedly connected to the side of the push extrusion block, wherein a roller is rotatably connected to the outside of the rotating shaft, and a push extrusion plate is slidably connected to the side of the roller.

[0010] Preferably, a low-pressure module support plate is fixedly connected to the other side of the pushing extrusion plate, and a limit locking component is installed at the end of the low-pressure module support plate. A low-pressure module of a power meter is fixedly connected to the top of the low-pressure module support plate. A high-pressure module of a power meter is electrically connected to one side of the low-pressure module. A high-pressure module support plate is fixedly connected to the bottom of the high-pressure module. A power meter housing is fixedly connected to the outside of the high-pressure module. An instrument display panel is electrically connected to the other side of the low-pressure module. A sealing ring is fixedly connected to the inner wall of the instrument display panel.

[0011] Preferably, the rollers form a rotating structure with the push extrusion block via a rotating shaft, and two rollers are symmetrically arranged about the vertical central axis of the push extrusion block.

[0012] Preferably, the pushing extrusion block forms a transmission structure with the pushing extrusion plate and the low-pressure module support plate, and the cross-sectional shape of the low-pressure module support plate is set as a right-angled triangle.

[0013] Preferably, the limiting locking assembly includes a limiting block, the limiting block is externally engaged with a limiting slot, and the end of the limiting slot is integrally connected with an insertion block. A pull pin is fixedly connected to the back of the limiting slot, and a spring is provided on the side of the pull pin. A pulling block is fixedly connected to the end of the pull pin, and a switch mounting rod is provided on the side of the pulling block. An electric telescopic rod switch is installed on the inner wall of the switch mounting rod.

[0014] Preferably, the pull-out pin and the housing of the power meter form a sliding structure, and the limiting latch and the housing of the power meter form an elastic structure through a spring.

[0015] Preferably, the cross-sectional shape of the insertion block is a right-angled triangle, the limiting block is fixedly connected to the low-voltage module support plate, and the limiting block has two positions relative to the vertical centerline of the low-voltage module support plate.

[0016] Preferably, the switch mounting rod is L-shaped, and the electric telescopic rod switch and the electric telescopic push rod are electrically connected.

[0017] Preferably, the instrument display panel forms a sealed structure with the power instrument housing through a sealing ring.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model provides a power meter with a high-voltage protection structure, which separates the easily damaged low-voltage module from the high-voltage module that is not easy to disassemble. The two can be electrically connected through conductive contacts. During maintenance, the low-voltage module of the control circuit and the display screen can be removed separately for repair, which is simple and convenient to operate.

[0020] 2. The present invention provides a power meter with a high-voltage protection structure. By setting a limit locking component, it is easy to lock and fix the low-voltage module and display screen when they are pushed back to their original positions, preventing them from coming out. When disassembling, simply pull the pull block outward to open the locking structure, and at the same time trigger the electric telescopic rod switch. The electric telescopic push rod pushes the extrusion block to push the low-voltage module and display screen outward. The structure is simple and the operation is convenient. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the overall internal structure of this utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the sliding ejection component of this utility model;

[0023] Figure 3 This is a three-dimensional structural schematic diagram of the overall side view of this utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the pushing extrusion block part of this utility model;

[0025] Figure 5 This is a three-dimensional structural diagram of the limiting and locking component of this utility model.

[0026] In the diagram: 1. Sliding ejection assembly; 101. Electric telescopic push rod; 102. Push extrusion block; 103. Rotating shaft; 104. Roller; 105. Push extrusion plate; 2. Low-pressure module support plate; 3. Limit locking assembly; 301. Limiting block; 302. Limiting slot; 303. Insertion block; 304. Pull-out pin; 305. Spring; 306. Pulling block; 307. Switch mounting rod; 308. Electric telescopic rod switch; 4. High-voltage module support plate; 5. High-voltage module of power instrument; 6. Power instrument housing; 7. Low-voltage module of power instrument; 8. Instrument display panel; 9. Sealing ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0029] Example 1

[0030] Please see Figure 2 and Figure 4 The present invention provides an electric meter with a high voltage protection structure, including a sliding ejection assembly 1. The sliding ejection assembly 1 includes an electric telescopic push rod 101. The output end of the electric telescopic push rod 101 is fixedly connected to a push extrusion block 102, and the side of the push extrusion block 102 is fixedly connected to a rotating shaft 103. The outside of the rotating shaft 103 is rotatably connected to a roller 104, and the side of the roller 104 is slidably connected to a push extrusion plate 105.

[0031] Please see Figure 1 This utility model discloses a power meter with a high-voltage protection structure. A low-voltage module support plate 2 is fixedly connected to the other side of the extrusion plate 105. A limit locking component 3 is installed at the end of the low-voltage module support plate 2. A low-voltage module 7 of the power meter is fixedly connected to the top of the low-voltage module support plate 2. A high-voltage module 5 of the power meter is electrically connected to one side of the low-voltage module 7. A high-voltage module support plate 4 is fixedly connected to the bottom of the high-voltage module 5. A power meter housing 6 is fixedly connected to the outside of the high-voltage module 5. An instrument display panel 8 is electrically connected to the other side of the low-voltage module 7. A sealing ring 9 is fixedly connected to the inner wall of the instrument display panel 8. The instrument display panel 8 and the power meter housing 6 form a sealing structure through the sealing ring 9.

[0032] The high-voltage module 5 of the power meter is equipped with a varistor for overvoltage protection. Under normal circuit conditions and when the voltage is within the normal range, the varistor exhibits a high impedance state, with a very high resistance and extremely low leakage current, essentially functioning as an open circuit. In this state, the varistor has almost no impact on the normal operation of the circuit, and the power meter can operate stably. This is because the varistor is a semiconductor material; under normal voltage, the number of charge carriers inside it is relatively small, resulting in a high resistance. However, when an abnormal high-voltage surge occurs in the circuit, such as due to lightning strikes or grid faults causing a sudden voltage increase exceeding [a certain value], the varistor becomes overvoltage protected. When the varistor reaches its threshold voltage, its internal structure changes rapidly. The potential barrier between the zinc oxide grains and grain boundaries is broken down, causing a sharp drop in impedance. Since the varistor is connected in parallel with the circuit, according to the characteristics of parallel circuits, when the voltage is the same, the current will be distributed according to the resistance. After the impedance of the varistor decreases, most of the surge current will pass through the varistor instead of through other sensitive electronic components such as power meters. This clamps the voltage in the circuit to a relatively safe level, preventing excessive voltage from damaging power meters and other circuit components.

[0033] Please see Figure 2 and Figure 4 The present invention provides an electric meter with a high-voltage protection structure. The roller 104 forms a rotating structure with the push extrusion block 102 through the rotating shaft 103. Two rollers 104 are symmetrically arranged about the vertical central axis of the push extrusion block 102. The push extrusion block 102 forms a transmission structure with the low-voltage module support plate 2 through the push extrusion plate 105. The cross-sectional shape of the low-voltage module support plate 2 is set as a right triangle.

[0034] After receiving the switching command from the electric telescopic rod switch 308, the output end of the electric telescopic push rod 101 will push outward and then retract, pushing the push extrusion block 102 forward. Because the push extrusion plate 105 is a right-angled triangle, the gap between its hypotenuse and the high-voltage module support plate 4 gradually narrows. However, when the output end of the electric telescopic push rod 101 pushes the push extrusion block 102 forward, the push extrusion block 102 itself has a certain width, allowing it to push the push extrusion plate 105 outward gradually. Furthermore, the two ends of the push extrusion block 102 are in contact with the high-voltage module support plate 4 and the push extrusion plate 105... Rotatable rollers 104 are provided at all contact points to convert sliding friction into rolling friction, which helps to reduce friction and allows the extrusion plate 105 to be pushed out more smoothly. The low-voltage module support plate 2 pushes the low-voltage module 7 of the power meter above it outward. Then, the maintenance personnel can remove the low-voltage module 7 of the power meter and the instrument display panel 8 from the power meter for maintenance. This utility model separates the easily damaged low-voltage module from the high-voltage module that is not easy to disassemble. The two can be electrically connected through conductive contacts. During maintenance, the low-voltage module of the control circuit and the display screen can be removed separately for repair, which is simple and convenient.

[0035] Example 2

[0036] Please see Figure 5 This utility model discloses a power meter with a high-voltage protection structure. The limit locking assembly 3 includes a limit block 301. The limit block 301 is externally engaged with a limit slot 302. An insertion block 303 is integrally connected to the end of the limit slot 302. A pull pin 304 is fixedly connected to the back of the limit slot 302. A spring 305 is provided on the side of the pull pin 304. A pulling block 306 is fixedly connected to the end of the pull pin 304. A switch mounting support rod 307 is provided on the side of the pulling block 306. An electric telescopic rod switch 308 is installed on the inner wall of the switch mounting support rod 307.

[0037] Please see Figure 5 This utility model discloses a power meter with a high-voltage protection structure. The pull-out pin 304 and the power meter housing 6 form a sliding structure. The limiting slot 302 and the power meter housing 6 form an elastic structure through the spring 305. The cross-sectional shape of the sliding block 303 is set as a right-angled triangle. The limiting block 301 is fixedly connected to the low-voltage module support plate 2. The limiting block 301 is set with two sides about the vertical center axis of the low-voltage module support plate 2. The switch mounting support rod 307 is set in the shape of "L". The electric telescopic rod switch 308 and the electric telescopic push rod 101 are electrically connected.

[0038] When the low-voltage module and display screen need to be disassembled and repaired, pull the pull-out blocks 306 on both sides outward. The pull-out blocks 306 press against the electric telescopic rod switch 308. The electric telescopic rod switch 308 issues a command to complete the control operation of the electric telescopic push rod 101, pushing the low-voltage module support plate 2 outward. At the same time, the pull pin 304 moves the limit latch 302 to the side, so that the limit latch 301 is released from the limitation of the limit latch 302 and the sliding block 303. The locking mechanism is opened, allowing the low-voltage module support plate 2 to be pushed outward. After the repair is completed, during installation, simply slide inward. After the limit latch 301 contacts the inclined surface of the sliding block 303, it continues to push inward along the inclined surface, which can gradually squeeze the limit latch 302 and the sliding block 303. 03. When the limiting block 301 moves to the side and enters between the limiting slot 302 and the sliding block 303, under the elastic action of the spring 305, the limiting slot 302 and the sliding block 303 push back inward again and lock on both sides of the limiting block 301, thus completing the locking and fixing of the low-voltage module support plate 2. This prevents the low-voltage module and the display screen from coming out. By setting the limiting locking component 3, it is convenient to lock and fix the low-voltage module and the display screen when they are pushed back to their original position, preventing them from coming out. When disassembling, simply pull the pulling block 306 outward to open the locking structure, and at the same time trigger the electric telescopic rod switch 308. The electric telescopic push rod 101 pushes the extrusion block 102 to push the low-voltage module and the display screen outward. The structure is simple and the operation is convenient.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power meter with a high-voltage protection structure, characterized in that: The slide ejection assembly (1) includes an electric telescopic push rod (101), the output end of which is fixedly connected to a push extrusion block (102), and the side of the push extrusion block (102) is fixedly connected to a rotating shaft (103). The outside of the rotating shaft (103) is rotatably connected to a roller (104), and the side of the roller (104) is slidably connected to a push extrusion plate (105). A low-voltage module support plate (2) is fixedly connected to the other side of the push extrusion plate (105), and a limit locking component (3) is installed at the end of the low-voltage module support plate (2). A low-voltage power meter module (7) is fixedly connected to the top of the low-voltage power meter support plate (2). A high-voltage power meter module (5) is electrically connected to one side of the low-voltage power meter module (7). A high-voltage power meter support plate (4) is fixedly connected to the bottom of the high-voltage power meter module (5). A power meter housing (6) is fixedly connected to the outside of the high-voltage power meter module (5). An instrument display panel (8) is electrically connected to the other side of the low-voltage power meter module (7). A sealing ring (9) is fixedly connected to the inner wall of the instrument display panel (8).

2. A power meter with a high-voltage protection structure according to claim 1, characterized in that: The roller (104) forms a rotating structure with the push extrusion block (102) via a rotating shaft (103), and two rollers (104) are symmetrically arranged about the vertical central axis of the push extrusion block (102).

3. A power meter with a high-voltage protection structure according to claim 1, characterized in that: The push extrusion block (102) forms a transmission structure with the low-pressure module support plate (2) through the push extrusion plate (105), and the cross-sectional shape of the low-pressure module support plate (2) is set as a right triangle.

4. A power meter with a high-voltage protection structure according to claim 1, characterized in that: The limiting locking assembly (3) includes a limiting block (301), which is externally engaged with a limiting slot (302). The end of the limiting slot (302) is integrally connected with an insertion block (303). A pull pin (304) is fixedly connected to the back of the limiting slot (302). A spring (305) is provided on the side of the pull pin (304). A pulling block (306) is fixedly connected to the end of the pull pin (304). A switch mounting rod (307) is provided on the side of the pulling block (306). An electric telescopic rod switch (308) is installed on the inner wall of the switch mounting rod (307).

5. A power meter with a high-voltage protection structure according to claim 4, characterized in that: The pull-out pin (304) and the power meter housing (6) form a sliding structure, and the limiting slot (302) and the power meter housing (6) form an elastic structure through the spring (305).

6. A power meter with a high-voltage protection structure according to claim 4, characterized in that: The cross-sectional shape of the insertion block (303) is a right triangle. The limiting block (301) is fixedly connected to the low-voltage module support plate (2), and the limiting block (301) has two positions relative to the vertical centerline of the low-voltage module support plate (2).

7. A power meter with a high-voltage protection structure according to claim 4, characterized in that: The switch mounting support rod (307) is L-shaped, and the electric telescopic rod switch (308) and the electric telescopic push rod (101) are electrically connected.

8. A power meter with a high-voltage protection structure according to claim 1, characterized in that: The instrument display panel (8) forms a sealed structure with the power instrument housing (6) through a sealing ring (9).

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