Monitoring alarm device of electrical equipment

Abstract

The utility model relates to a monitoring alarm device for electrical equipment. The monitoring alarm device comprises a mounting plate, a passive contact piece and an active contact piece, the passive contact piece is of an annular structure and is arranged along the edge of the mounting plate; the active contact pieces are bimetallic strips and are arranged along the periphery of the passive contact piece, one end of each active contact piece is a fixed end and is fixed on the mounting plate through a rivet, the other end of each active contact piece is a free end, and the thermal expansion coefficient of the metal piece, close to one side of the passive contact piece, of each active contact piece is smaller than that of the other metal piece. The active contact piece and the passive contact piece have a contact state and a separation state. According to the utility model, the bimetallic strip which can deform after being heated is arranged as the active contact piece, and when the temperature in the box body rises to a certain degree, the active contact piece is bent due to heating and is in contact with the passive contact piece, so that an alarm system is triggered. Compared with a traditional electronic temperature sensor, the electronic temperature sensor has the advantages that the manufacturing cost is greatly reduced on the premise of guaranteeing functions, and the electronic temperature sensor is more suitable for large-scale application.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment safety monitoring, in particular to a monitoring and alarming device for electrical equipment. Background Art

[0002] Electrical equipment, such as distribution cabinets, meter boxes, and servers, etc., is an important and indispensable part in modern industrial, commercial, and household environments. These devices are usually enclosed in boxes to protect their internal electronic components from the external environment. However, due to the heat generated by the continuous operation of the equipment, the temperature inside the box may rise. If not monitored and controlled in time, it may lead to equipment failures, performance degradation, or even safety accidents.

[0003] Currently, most electrical equipment relies on electronic temperature sensors for temperature monitoring. Although these sensors have high precision, they are relatively costly, and their installation and maintenance are relatively complex. In some cost-sensitive application scenarios, such a high-temperature alarm system may not be the most ideal solution. In addition, a single temperature sensor may not be able to comprehensively cover all areas inside the equipment, there are monitoring blind spots, and when a local area overheats, a warning may not be issued in time. To pursue the timeliness and accuracy of data, the number of temperature sensors often needs to be increased, which will further increase the cost.

[0004] Therefore, we have designed a temperature monitoring and alarming device for electrical equipment with timely detection and low cost. Content of the Utility Model

[0005] In order to overcome the disadvantages existing in the above background art, the utility model provides a monitoring and alarming device for electrical equipment.

[0006] The technical solution is as follows: A monitoring and alarming device for electrical equipment includes a mounting plate, a passive contact piece, and an active contact piece; the passive contact piece is in a ring structure and is arranged along the edge of the mounting plate; the active contact piece is a bimetallic strip, and a plurality of them are arranged around the passive contact piece. One end of the active contact piece is a fixed end, which is fixed to the mounting plate by a rivet, and the other end is a free end. The coefficient of thermal expansion of the metal sheet on the side of the active contact piece close to the passive contact piece is less than that of the other metal sheet. The active contact piece and the passive contact piece have two states: contact and separation; a PLC controller is also provided on the mounting plate, and a display, a control panel, and an audible and visual alarm are integrated on the PLC controller. The PLC controller is electrically connected to the passive contact piece and the active contact piece.

[0007] As a further preferred solution, the bimetallic strip is made of manganese-nickel-copper alloy and nickel-iron alloy, and the nickel-iron alloy is closer to the active contact piece.

[0008] As a further preferred solution, an elastic metal sheet is provided on the passive contact piece. The elastic metal sheet corresponds to the position of the active contact piece, and the elastic metal sheet bulges toward the side of the active contact piece to form a contact point.

[0009] As a further preferred solution, it further includes an adjusting screw. A threaded hole adapted to it is provided on the mounting plate, and one end of the adjusting screw passes through the threaded hole and abuts against one side of the active contact piece.

[0010] As a further preferred solution, it further includes a heat conduction sheet. The heat conduction sheet is arranged on the mounting plate through the adjusting screw. A gasket is provided between the screw head of the adjusting screw and the heat conduction sheet. The heat conduction sheet includes a mounting end and a contact end, and the contact end is in an "Ω" shape.

[0011] As a further preferred solution, it further includes a fan. The fan is arranged on the mounting plate, and the fan is electrically connected to the PLC controller.

[0012] The utility model has the following advantages:

[0013] 1. In the utility model, a bimetallic sheet that deforms when heated is set as the active contact piece. When the temperature in the box rises to a certain degree, the active contact piece bends due to heat and contacts the passive contact piece, thereby triggering the alarm system. Since the active contact pieces can be evenly distributed around the equipment, multi-directional temperature monitoring can be realized, improving the timeliness and accuracy of temperature monitoring. At the same time, compared with traditional electronic temperature sensors, this design greatly reduces the manufacturing cost on the premise of ensuring the function and is more suitable for large-scale applications.

[0014] 2. In the utility model, by setting the adjusting screw, the distance between the active contact piece and the passive contact piece can be adjusted. At different temperatures, the deformation amount of the active contact piece is also different, so the triggering temperature of the alarm can be adjusted.

[0015] 3. In the utility model, by setting the heat conduction sheet, the temperature can be collected more quickly from multiple areas, and the temperature inside the electrical equipment can be better transmitted to the active contact piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a partial enlargement Figure 1 of the utility model.

[0018] Figure 3 It is a partial enlargement Figure 2 of the utility model.

[0019] Figure 4 It is a partial enlargementFigure 3 。

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of another perspective of the present utility model.

[0021] Figure 6 This is a schematic diagram of the present utility model installed on the door of an electrical equipment box.

[0022] Wherein: 1 - mounting plate, 2 - passive contact piece, 21 - elastic metal sheet, 3 - active contact piece, 31 - adjusting screw, 4 - PLC controller, 5 - heat conduction sheet, 51 - gasket, 6 - fan, 7 - box body. Specific embodiments

[0023] The following further illustrates the technical solution with specific embodiments. It should be noted that: The words indicating directions such as up, down, left, and right in this article are only for the positions of the shown structures in the corresponding drawings. The numbers assigned to the components in this article itself, for example: first, second, etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And as used in this application: connection, coupling, unless otherwise specified, all include direct and indirect connections.

[0024] As Figures 1-4 shown, the monitoring and alarm device of this electrical equipment is mainly installed inside the box body of the electrical equipment, used to monitor the temperature inside the box and issue an alarm according to the set temperature. It includes a rectangular mounting plate 1. There is a cross-shaped wire groove in the middle of one side of the mounting plate 1. The edge of the mounting plate 1 is stepped, and a passive contact piece 2 in a ring structure is arranged in the recessed part. A plurality of active contact pieces 3 are arranged around the upper, lower, left, and right of the passive contact piece 2. In this embodiment, one is arranged around each of the four sides of the passive contact piece 2. Both the passive contact piece 2 and the active contact piece 3 are metal sheets. In particular, the active contact piece 3 is a bimetallic sheet, which is bonded by two metal sheets with different thermal expansion coefficients. The two ends of the active contact piece 3 are respectively a fixed end and a free end. Among them, the fixed end is fixed to the mounting plate 1 by a rivet. After the free end is heated and expands, due to the different thermal expansion coefficients of the two metals, it bends. Specifically, the thermal expansion coefficient of the metal sheet on the side close to the passive contact piece 2 is smaller than that of the other metal sheet. Therefore, after the temperature rises, the active contact piece 3 bends toward the side of the passive contact piece 2. The active contact piece 3 and the passive contact piece 2 have two states: contact and separation; before the metal sheet deforms, the two are in a separated state. After the temperature rises, the metal sheet deforms, and thus bends to contact the passive contact piece 2.

[0025] As Figure 1 、 5As shown in the figure, the device further includes a PLC controller 4. The PLC controller 4 is integrated with a display, a control panel, and an audible and visual alarm. The PLC controller 4 is electrically connected to the passive contact piece 2 and the active contact piece 3. After the active contact piece 3 contacts the passive contact piece 2, the circuit is connected, and the audible and visual alarm on the PLC controller 4 emits an alarm. In addition, a short message sending module can also be integrated on the PLC controller 4. After the circuit is connected, the PLC controller 4 will send a message to the receiving terminal through the short message sending module to notify the receiving terminal for timely emergency repair.

[0026] Specifically, in this embodiment, the bimetallic strip is made of manganese-nickel-copper alloy and nickel-iron alloy, and the nickel-iron alloy is closer to the active contact piece 3.

[0027] As Figure 2 , 3 As shown in the figure, an elastic metal piece 21 is provided on the passive contact piece 2. The elastic metal piece 21 corresponds to the position of the active contact piece 3. The side of the elastic metal piece 21 facing the active contact piece 3 arches to form a contact point. The setting of the elastic metal piece 21 can provide a certain deformation space for their contact. In addition, to adjust the triggering temperature, an adjusting screw 31 is also provided. A threaded hole adapted to it is provided on the mounting plate 1. One end of the adjusting screw 31 passes through the threaded hole and abuts against one side of the active contact piece 3. By rotating the adjusting screw 31, the distance between the active contact piece 3 and the passive contact piece 2 can be adjusted; at different temperatures, the deformation amount of the active contact piece 3 is different. At a lower temperature, the deformation amount is small, and at a higher temperature, the deformation amount is large. Therefore, by adjusting the distance between the two, the triggering temperature can be controlled.

[0028] As Figure 4 As shown in the figure, it further includes a heat conduction piece 5. The heat conduction piece 5 is arranged on the mounting plate 1 through the adjusting screw 31. Each active contact piece 3 corresponds to at least one heat conduction piece 5. A gasket 51 is provided between the screw head of the adjusting screw 31 and the heat conduction piece 5, which increases the heat conduction area. The heat conduction piece 5 includes a mounting end and a contact end. The mounting end is connected to the adjusting screw 31, and the contact end is in an "Ω" shape. Its protruding position mainly contacts the inner wall of the box body for heat conduction. The heat conduction piece 5 can be replaced or customized. Figure 6 The figure shows the structural diagram of the device applied to the electrical equipment box body. The device is generally arranged on the box door. At this time, after the box door is closed, the four heat conduction pieces 5 on the upper, lower, left, and right sides are respectively pressed against the corresponding four inner walls of the box body. When the temperature in any area of the box body rises sharply, the temperature of the side wall closest to it will rise first, so that it can be quickly transmitted to the active contact piece 3 through the corresponding heat conduction piece 5, so that it can bend in time.

[0029] This device has the advantages of timely and accurate temperature monitoring and low cost, and can effectively meet the requirements of electrical equipment temperature monitoring. This new type of monitoring and alarm device can not only improve the safety and stability of electrical equipment, but also reduce the monitoring cost, and at the same time promote the entire industry to develop in a more intelligent and efficient direction.

[0030] In addition, this device further includes a fan 6, the fan 6 is arranged on the mounting plate 1, and the fan 6 is electrically connected to the PLC controller 4. When the temperature rises and the staff cannot arrive at the scene in the first time, the temperature can be reduced in advance through the fan 6.

[0031] The above embodiments only represent the preferred embodiments of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, improvements and substitutions can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A monitoring and alarm device for electrical equipment, characterized in that: It comprises a mounting plate (1), a passive contact sheet (2) and an active contact sheet (3); The passive contact piece (2) is a ring-shaped structure and is arranged along the edge of the mounting plate (1); The active contact piece (3) is a bimetallic sheet, and a plurality of bimetallic sheets are arranged around the passive contact piece (2). One end of the active contact piece (3) is a fixed end, which is fixed to the mounting plate (1) by a rivet, and the other end is a free end. The thermal expansion coefficient of the metal sheet on the side of the active contact piece (3) close to the passive contact piece (2) is smaller than the thermal expansion coefficient of the other metal sheet. The active contact piece (3) and the passive contact piece (2) have two states: contact and separation. The mounting plate (1) is also provided with a PLC controller (4), the PLC controller (4) being integrated with a control panel and an audible and visual alarm, and the PLC controller (4) being electrically connected to the passive contact piece (2) and the active contact piece (3).

2. The monitoring and alarm device for electrical equipment according to claim 1, characterized in that: The bimetallic strips are manganese-nickel-copper alloy and nickel-iron alloy, wherein the one close to the active contact piece is nickel-iron alloy.

3. The monitoring and alarm device for electrical equipment according to claim 1 or 2, characterized in that: An elastic metal sheet (21) is arranged on the passive contact sheet, the elastic metal sheet (21) corresponds to the position of the active contact sheet (3), and the elastic metal sheet (21) is arched toward one side of the active contact sheet (3) to form a contact point.

4. The monitoring and alarm device for electrical equipment according to claim 3, characterized in that: It also comprises an adjusting screw (31), a threaded hole matching the adjusting screw is provided on the mounting plate (1), one end of the adjusting screw (31) passes through the threaded hole and abuts against one side of the active contact piece (3).

5. The monitoring and alarm device for electrical equipment according to claim 4, characterized in that: It also includes a heat conduction sheet (5), which is arranged on the mounting plate (1) via an adjusting screw (31), a gasket is arranged between the screw head of the adjusting screw (31) and the heat conduction sheet (5), and the heat conduction sheet (5) includes a mounting end and a contact end, and the contact end is in an "Ω" shape.

6. The monitoring and alarm device for electrical equipment according to claim 1, characterized in that: It also includes a fan (6), which is arranged on the mounting plate (1) and is electrically connected to the PLC controller (4).

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