Electric energy meter with terminal temperature monitoring function

Abstract

The utility model provides an electric energy meter with a terminal temperature monitoring function, which comprises an electric energy meter body, an installation groove is arranged on the electric energy meter body, a plurality of temperature measuring devices are arranged in the installation groove, and binding posts are arranged on the temperature measuring devices. The binding posts and the temperature measuring device are electrically connected with the main board of the electric energy meter body, the temperature measuring device comprises an insulating heat-conducting ceramic chip, the insulating heat-conducting ceramic chip is arranged in the mounting groove, and a plurality of binding posts are arranged on the insulating heat-conducting ceramic chip; heat of the two wiring piles is effectively transmitted to the temperature measuring device for measurement through the insulating heat-conducting ceramic chip, and due to insulating hard isolation of the insulating heat-conducting ceramic chip, the problems that when the temperature measuring device is damaged, mains voltage breakdown occurs, short circuit is caused, and main board elements are damaged are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to an electric energy meter with a terminal temperature monitoring function. Background Art

[0002] An energy meter is an instrument used to measure electrical energy. Its main function is to measure electrical quantities such as current, voltage and power to calculate the amount of energy used. Energy meters are widely used in households and industries to monitor and settle electricity usage.

[0003] When installing the electric energy meter, it is necessary to connect the wires to the terminal posts of the electric energy meter; and in subsequent use, due to reasons such as increased use time of the electric energy meter, untimely maintenance and increased power load, poor contact will occur at the terminal posts, and the contact impedance will increase, which makes the terminal posts melt due to heat, leading to the risk of fire; therefore, a temperature measuring device is set at the terminal post during the production of the electric energy meter. When the existing temperature measuring device adopts non-contact measurement methods such as infrared measurement, there is a problem of inaccurate measurement, so direct contact measurement such as temperature sensors is adopted. During direct contact measurement, when the electric energy meter is impacted by external force, the measuring element vibrates and is damaged, or the measuring element contacts with the terminal post in a high temperature state and is damaged, the mains voltage will break down between the terminal post and the measuring element, thereby causing a short circuit and damaging the mainboard components. Utility Model Content

[0004] In view of the deficiencies existing in the prior art, the utility model provides an electric energy meter with a terminal temperature monitoring function, which solves the problems existing in the prior art.

[0005] An electric energy meter with terminal temperature monitoring function, comprising:

[0006] The electric energy meter body is provided with a mounting groove, and a plurality of temperature measuring devices are provided in the mounting groove. The temperature measuring devices are provided with a terminal. The terminal and the temperature measuring device are electrically connected to the main board of the electric energy meter body. The temperature measuring device includes:

[0007] The insulating thermally conductive ceramic sheet is arranged in the installation groove, and a plurality of connecting posts are arranged on the insulating thermally conductive ceramic sheet for performing hard insulation on the connecting posts.

[0008] Preferably, the temperature measuring device further comprises:

[0009] A heat-resistant sheet is provided between the insulating thermally conductive ceramic sheet and the mounting groove, a temperature sensing probe groove is provided on the heat-resistant sheet, the temperature sensing probe groove is located between the insulating thermally conductive ceramic sheet and the heat-resistant sheet, a temperature sensing probe is provided in the temperature sensing probe groove, and the temperature sensing probe is electrically connected to the main board of the electric energy meter body.

[0010] Preferably, a bimetallic switch slot is provided on the heat-resistant sheet, the bimetallic switch slot is located between the insulating thermally conductive ceramic sheet and the heat-resistant sheet, a bimetallic switch is provided in the bimetallic switch slot, and the bimetallic switch is electrically connected to the main board of the electric energy meter body.

[0011] Preferably, a soft body is provided between both ends of the insulating heat-conducting ceramic sheet and the heat-resistant sheet.

[0012] Preferably, the software is made of a flame retardant software material.

[0013] Preferably, an expansion interface is further provided on the electric energy meter body, the expansion interface is connected to the infrared temperature measuring device, and the expansion interface is electrically connected to the main board of the electric energy meter body.

[0014] Preferably, the temperature sensing probe is a thermistor.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the heat of the two terminal piles is effectively transferred to the temperature measuring device for measurement through the insulating thermally conductive ceramic sheet. Due to the insulating hard isolation of the insulating thermally conductive ceramic sheet, the problem of mains voltage breakdown when the temperature detection device is damaged, thereby causing a short circuit and damaging the mainboard components, is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 It is a side structural schematic diagram of another embodiment of the utility model;

[0018] Figure 3 This is a logic diagram of another embodiment of the utility model. DETAILED DESCRIPTION

[0019] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1 to Figure 2 As shown, the embodiment of the utility model provides an electric energy meter with a terminal temperature monitoring function, comprising:

[0021] The electric energy meter body 1 is provided with a mounting slot 2, in which a plurality of temperature measuring devices are provided, and the temperature measuring devices are provided with a terminal 4; the terminal 4 and the temperature measuring device are both electrically connected to the main board of the electric energy meter body 1, and the temperature measuring device comprises:

[0022] An insulating thermally conductive ceramic sheet 3 is arranged in the mounting groove 2, and a plurality of connecting posts 4 are arranged on the insulating thermally conductive ceramic sheet 3 for insulating and hard isolating the connecting posts 4;

[0023] The working principle of the above technical solution is as follows: during the installation process, the neutral wire and the live wire are connected to the corresponding terminal posts 4 provided on the insulating thermally conductive ceramic sheet 3; when in use, the temperature of the terminal post 4 is monitored by a temperature measuring device provided on the side of the insulating thermally conductive ceramic sheet 3 away from the terminal post 4. During monitoring, the heat of the terminal post 4 is transferred to the temperature measuring device through the insulating thermally conductive ceramic sheet 3 to complete the monitoring; wherein, four terminal posts 4 are provided on one insulating thermally conductive ceramic sheet 3, and the four terminals 4 are grouped in pairs, and the two groups are respectively the live wire in and the live wire out or the neutral wire in and the neutral wire out, so that the temperature value of the live wire connection position or the neutral wire connection position is measured through one insulating thermally conductive ceramic sheet 3;

[0024] The beneficial effects of the above technical solution: through the above design, the heat of the two terminal piles 4 is effectively transferred to the temperature measuring device for measurement through the insulating thermally conductive ceramic sheet 3. Due to the insulating hard isolation of the insulating thermally conductive ceramic sheet 3, the problem of mains voltage breakdown when the temperature detection device is damaged, thereby causing a short circuit and damaging the mainboard components is solved.

[0025] In one embodiment, the temperature measuring device further comprises:

[0026] A heat-resistant sheet 5 is provided between the insulating thermally conductive ceramic sheet 3 and the mounting groove 2, and a temperature sensing probe groove 9 is provided on the heat-resistant sheet 5. The temperature sensing probe groove 9 is located between the insulating thermally conductive ceramic sheet 3 and the heat-resistant sheet 5. A temperature sensing probe 10 is provided in the temperature sensing probe groove 9, and the temperature sensing probe 10 is electrically connected to the main board of the electric energy meter body 1.

[0027] The working principle and beneficial effects of the above technical solution: During actual use, the insulating thermally conductive ceramic sheet 3 transfers heat to the temperature sensing probe 10 arranged in the heat-resistant sheet 5, thereby completing the temperature monitoring of the connecting post 4; wherein, when the temperature sensing probe 10 is installed in the temperature sensing probe slot 9, it is necessary to pre-inject thermal conductive glue into the temperature sensing probe slot 9 to ensure that there is no gap between the temperature sensing probe 10 and the insulating thermally conductive ceramic sheet 3, thereby ensuring the stability of heat transfer; wherein, a thermistor is used as the temperature sensing probe 10.

[0028] In one embodiment, a bimetallic switch slot 7 is provided on the heat-resistant sheet 5, the bimetallic switch slot 7 is located between the insulating heat-conducting ceramic sheet 3 and the heat-resistant sheet 5, a bimetallic switch 8 is provided in the bimetallic switch slot 7, and the bimetallic switch 8 is electrically connected to the main board of the electric energy meter body 1;

[0029] The working principle and beneficial effects of the above technical solution: In actual use, the heat of the terminal post 4 is transferred to the bimetallic switch 8 through the insulating thermally conductive ceramic sheet 3, and the bimetallic switch 8 will open when the temperature reaches a preset value; when the bimetallic switch 8 is installed in the bimetallic switch slot 7, it is necessary to pre-inject thermal conductive glue into the bimetallic switch slot 7 to ensure that there is no gap between the bimetallic switch 8 and the insulating thermally conductive ceramic sheet 3, thereby ensuring the stability of heat transfer;

[0030] Among them, the bimetallic switch is a bimetallic temperature switch, which includes a bimetallic strip, a driving mechanism and contacts. The bimetallic strip is welded on the driving mechanism. When the temperature rises, the thermal expansion of the bimetallic strip will cause the displacement of the mechanism, causing the contacts to open or close; when the bimetallic temperature switch is at room temperature, the thermal expansion coefficients of the two metal strips are different, causing the bimetallic strip to maintain its original shape, and at this time, the contacts are in a closed state; when the ambient temperature rises, the bimetallic strip expands due to the heat, and due to the different thermal expansion coefficients of the two metal strips, the bimetallic strip bends or twists. When the deformation of the bimetallic strip exceeds a certain degree, the driving mechanism will be acted upon by force, causing the contacts to open and the bimetallic switch to open.

[0031] In one embodiment, a soft body 6 is disposed between both ends of the insulating thermally conductive ceramic sheet 3 and the heat-resistant sheet 5 , and the soft body 6 is made of a flame-retardant soft body 6 material.

[0032] The working principle and beneficial effects of the above technical solution: the insulating thermally conductive ceramic sheet 3 is lifted up by the provided software 6, so that the insulating thermally conductive ceramic sheet 3 is in close contact with the metal of the terminal pile 4 when the terminal pile 4 of the electric energy meter is installed; wherein the flame retardant software 6 is made of PVC.

[0033] In one embodiment, an expansion interface is further provided on the electric energy meter body 1 , the expansion interface is connected to the infrared temperature measuring device, and the expansion interface is electrically connected to the main board of the electric energy meter body 1 .

[0034] The working principle and beneficial effects of the above technical solution: In actual use, an external infrared temperature measuring device can be connected by providing an expansion interface. After the infrared temperature measuring device is installed in the meter box or on the wall opposite the meter box in the power room, the temperature of all open joints in the meter box and the shunt wire clamp joints on the meter box on the installation plane can be monitored. If the set value is exceeded, it will still be transmitted to the substation concentrator in the form of a carrier according to a predetermined procedure. The concentrator reports to the collection center to generate a processing work order.

[0035] like Figure 3As shown, in one embodiment, the energy meter CPU obtains the input of the clock, metering chip, input button and temperature measurement module, the energy meter CPU controls the power failure output, 485 communication, infrared communication, LCD display and carrier communication, and the energy meter CPU exchanges information with the storage, which are all functions that the existing energy meter already has; by connecting the temperature sensing probe 10 with the temperature measurement module behind the energy meter, the temperature monitoring of the wiring pile 4 is completed;

[0036] By connecting the bimetal switch 8 to the CPU of the electric energy meter, when the temperature of the terminal head of the terminal 4 rises to a preset threshold value (between the insulation tolerance temperature and the maximum ambient temperature), the bimetal switch 8 opens, and this signal is sampled by the existing acquisition system of the electric energy meter and reported, and a processing work order is generated. It is transmitted to the substation concentrator in the form of a carrier according to a predetermined procedure. The concentrator reports to the acquisition center to generate a processing work order, and the on-duty staff inspects and handles it on site to eliminate the fault, thereby avoiding further heating and burning of the meter.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An electric energy meter with terminal temperature monitoring function, comprising: The electric energy meter body is characterized in that a mounting groove is provided on the electric energy meter body, a plurality of temperature measuring devices are provided in the mounting groove, and a terminal is provided on the temperature measuring device; the terminal and the temperature measuring device are both electrically connected to the main board of the electric energy meter body, and the temperature measuring device comprises: The insulating thermally conductive ceramic sheet is arranged in the installation groove, and a plurality of connecting posts are arranged on the insulating thermally conductive ceramic sheet for performing hard insulation on the connecting posts.

2. An electric energy meter with terminal temperature monitoring function as claimed in claim 1, characterized in that: The temperature measuring device also includes: A heat-resistant sheet is provided between the insulating thermally conductive ceramic sheet and the mounting groove, a temperature sensing probe groove is provided on the heat-resistant sheet, the temperature sensing probe groove is located between the insulating thermally conductive ceramic sheet and the heat-resistant sheet, a temperature sensing probe is provided in the temperature sensing probe groove, and the temperature sensing probe is electrically connected to the main board of the electric energy meter body.

3. An electric energy meter with terminal temperature monitoring function as claimed in claim 2, characterized in that: A bimetallic switch slot is provided on the heat-resistant sheet, the bimetallic switch slot is located between the insulating thermally conductive ceramic sheet and the heat-resistant sheet, a bimetallic switch is provided in the bimetallic switch slot, and the bimetallic switch is electrically connected to the main board of the electric energy meter body.

4. The electric energy meter with terminal temperature monitoring function as claimed in claim 2, characterized in that: Soft parts are arranged between the two ends of the insulating heat-conducting ceramic sheet and the heat-resistant sheet.

5. The electric energy meter with terminal temperature monitoring function as claimed in claim 4, characterized in that: The software is made of flame retardant software material.

6. The electric energy meter with terminal temperature monitoring function as claimed in claim 1, characterized in that: An expansion interface is also provided on the electric energy meter body, the expansion interface is connected to the infrared temperature measuring device, and the expansion interface is electrically connected to the main board of the electric energy meter body.

7. The electric energy meter with terminal temperature monitoring function as claimed in claim 2, characterized in that: The temperature sensing probe is a thermistor.

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