Temperature monitor, early warning device and early warning method for electrical equipment

Abstract

The invention discloses a temperature monitor for electrical equipment, an early warning device and an early warning method, and relates to the technical field of electrical equipment monitoring, in the scheme of the invention, a combined structure of memory metal and two pressing blocks plays roles of temperature induction conduction and a power supply temperature control switch at the same time. When the electrical equipment works normally, the power supply of the device is in a disconnected state, the electronic sensor does not work, and only when the temperature of the electrical equipment is abnormal, the electronic sensor is switched on by the power supply to realize temperature monitoring, so that the monitoring accuracy can be ensured, the power consumption of the device can be reduced, and the endurance of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment monitoring, and in particular to a temperature monitor, an early warning device, and an early warning method for electrical equipment. Background Art

[0002] Electrical equipment such as transformers, switches, cables and high-voltage lines are subject to complex and diverse daily operating conditions, and have many exposed points. The various existing electrical connection points (such as wire connections and branches, circuit breakers, fuse terminal connections, and transformer terminals) are affected by factors such as the product's own process quality and installation quality, which can easily lead to frequent failures in the distribution network power supply due to heat.

[0003] Current temperature monitoring devices can be mainly divided into electronic and mechanical types. Electronic monitoring devices use electronic circuits to detect the temperature of electrical connection points through chips and sensor elements. They have high measurement accuracy and high efficiency, but the disadvantage is that the device must be powered on for monitoring, and the power supply requirements are relatively high. It is more difficult to obtain power in a high-voltage environment, and the monitoring endurance time is short. Mechanical monitoring devices usually use temperature-changing materials such as memory metal for temperature sensing. When the temperature reaches the set temperature point, a warning sign pops up to alarm. The disadvantage is that it is easily affected by environmental factors and the alarm accuracy is low. Summary of the Invention

[0004] The present application provides a temperature monitor, an early warning device, and an early warning method for electrical equipment, which are used to achieve the invention purpose of long-lasting and high-accuracy temperature monitoring of electrical equipment.

[0005] To achieve the above-mentioned object of the invention, the first aspect of the present application provides a temperature monitor for electrical equipment, comprising: a first pressing block, a second pressing block, a memory metal, and an insulating and heat-insulating pad, wherein the first pressing block and the second pressing block are made of an electrically conductive and heat-conductive material;

[0006] The first pressing block and the second pressing block are separated and fixed by the insulating and heat-insulating pad, and both the first pressing block and the second pressing block are equipped with power leads;

[0007] The memory metal is assembled between the first pressing block and the second pressing block and is in contact with the first pressing block;

[0008] A first temperature sensing element is mounted on the first pressing block, wherein the first temperature sensing element is used to collect temperature data of the electrical connection point.

[0009] Preferably, it further comprises: a second temperature sensing element;

[0010] The second temperature sensing element is assembled on the second pressing block, wherein the second temperature sensing element is used to collect ambient temperature data.

[0011] Preferably, the first pressing block and the second pressing block are metal pressing blocks.

[0012] Preferably, the insulating and heat-isolating pad is a polytetrafluoroethylene pad.

[0013] Preferably, the first temperature sensing element and the second temperature sensing element are both NTC thermistor sensors.

[0014] Preferably, the memory metal is specifically: nickel-titanium alloy or copper-zinc-aluminum alloy.

[0015] A second aspect of the present application provides a temperature monitoring and early warning device, comprising: a power supply module, a processor module, and a temperature monitor as provided in the first aspect of the present application;

[0016] The power supply module is electrically connected to the power supply leads of the first pressing block and the second pressing block in the temperature monitor and the power supply lead of the processor module;

[0017] The first data lead of the processor module is connected to the data lead of the first temperature sensing element in the temperature monitor, and is used to receive the electrical connection point temperature data collected by the first temperature sensing element, and determine the temperature monitoring early warning judgment result based on the electrical connection point temperature data.

[0018] Preferably, when the temperature monitor includes a second temperature sensing element, it further comprises:

[0019] The second data lead of the processor module is connected to the data lead of the second temperature sensing element in the temperature monitor, and is used to receive the ambient temperature data collected by the second temperature sensing element, and determine the temperature monitoring early warning judgment result based on the electrical connection point temperature data and the ambient temperature data.

[0020] A third aspect of the present application provides a temperature monitoring and early warning method, which is applied to the temperature monitoring and early warning device provided in the second aspect of the present application, comprising:

[0021] When detecting that the first temperature sensing element is powered on, receiving the electrical connection point temperature data collected by the first temperature sensing element;

[0022] A temperature monitoring and early warning determination result is determined based on the temperature data of the electrical connection point.

[0023] Preferably, when the temperature monitor includes a second temperature sensing element, it further includes:

[0024] When detecting that the second temperature sensing element is powered on, receiving ambient temperature data collected by the second temperature sensing element;

[0025] Determining the temperature monitoring warning result according to the electrical connection point temperature data specifically includes:

[0026] A temperature monitoring and early warning determination result is determined based on a comparison result of the electrical connection point temperature data and the ambient temperature data.

[0027] It can be seen from the above technical solutions that this application has the following advantages:

[0028] Based on the temperature monitor structure provided by this application, the first pressure block of the temperature monitor is first attached to the electrical connection point to be monitored. Under normal conditions, the two pressure blocks are separated by an insulating block, so the power supply is disconnected. However, when the temperature of the first pressure block increases, the height of the memory metal increases with the change in the temperature of the first pressure block. When the memory metal contacts the second pressure block, the power supply is turned on, and the circuit part begins to operate. The electrical connection point temperature sensor and the ambient temperature sensor respectively collect the electrical connection point and ambient temperature, thereby accurately determining the temperature of the electrical connection point and providing an early warning. When the temperature of the first pressure block returns to normal, the height of the memory metal decreases, and the power circuit is disconnected, returning to a non-power-consuming state. In the solution of this application, the combination of the memory metal and the two pressure blocks simultaneously serves as a temperature sensor and a power temperature control switch. When the temperature of the electrical device is normal, the device power is disconnected and the electronic sensor does not operate. Only when the temperature of the electrical device is abnormal, the power supply is turned on and the electronic sensor intervenes to achieve accurate temperature monitoring. This solution ensures monitoring accuracy while reducing the power consumption of the device and improving the device's battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 This is a structural diagram of an embodiment of a temperature monitoring and early warning device for electrical equipment provided in this application.

[0031] Figure 2 This is a schematic structural diagram of a temperature monitor for electrical equipment provided in this application.

[0032] Figure 3 This is a flow chart of an embodiment of a temperature monitoring and early warning method provided in this application.

[0033] The accompanying drawings are numerals as follows:

[0034] M, processor module; C, temperature monitor; V, power module; 1, first pressure block; 2, first temperature sensor; 3, data lead of first temperature sensor; 4, insulating heat insulation pad; 5, data lead of second temperature sensor; 6, second temperature sensor; 7, memory metal; 8, second pressure block; 9, power lead. DETAILED DESCRIPTION

[0035] The present invention provides a temperature monitor, an early warning device and an early warning method for electrical equipment.

[0036] In order to make the purpose, features, and advantages of the invention of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described below are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] First, a detailed description of an embodiment of a temperature monitoring and early warning device for electrical equipment provided by this application is as follows:

[0038] See also Figure 1 , a temperature monitoring and early warning device provided by the present application includes: a power module V, a processor module M and a temperature monitor;

[0039] The power module V is electrically connected to the power leads of the first pressing block 1 and the second pressing block 8 in the temperature monitor and the power supply leads of the processor module M;

[0040] The first data lead of the processor module M is connected to the data lead 3 of the first temperature sensing element 2 in the temperature monitor, and is used to receive the electrical connection point temperature data collected by the first temperature sensing element 2, and determine the temperature monitoring warning judgment result based on the electrical connection point temperature data.

[0041] It should be noted that the power supply module V, processor module M and temperature monitor provided in this embodiment, wherein the temperature monitor is used to monitor the temperature of the power connection point of the power equipment, the power supply module V is used to power the processor module M and the temperature sensor element in the temperature monitor, and the processor module M is used to monitor the temperature of the electrical connection point based on the temperature data collected by the temperature sensor element.

[0042] More specifically, when the temperature monitor includes the second temperature sensing element 6, it also includes:

[0043] The second data lead of the processor module is connected to the data lead 5 of the second temperature sensing element 6 in the temperature monitor, and is used to receive the ambient temperature data collected by the second temperature sensing element 6, and determine the temperature monitoring warning judgment result based on the electrical connection point temperature data and the ambient temperature data.

[0044] like Figure 2 As shown, the temperature monitor for electrical equipment provided in this embodiment includes: a first pressing block 1, a second pressing block 8, a memory metal 7 and an insulating and heat-insulating pad 4, wherein the first pressing block 1 and the second pressing block 8 are made of conductive and heat-conductive materials;

[0045] The first pressing block 1 and the second pressing block 8 are separated and fixed by an insulating and heat-insulating pad 4, and both the first pressing block 1 and the second pressing block 8 are provided with a power lead 9;

[0046] The memory metal 7 is assembled between the first pressing block 1 and the second pressing block 8 and is in contact with the first pressing block 1;

[0047] A first temperature sensing element 2 is mounted on the first pressing block 1 , wherein the first temperature sensing element 2 is used to collect temperature data of the electrical connection point.

[0048] It should be noted that the first pressing block 1 of the device is fixed tightly against the electrical connection point. At this time, it can be understood that the first pressing block 1 is isolated by the insulating block, and the power lead of the first temperature sensing element 2 is connected to the first pressing block 1. When the power is disconnected, the sensing element does not consume power. When the temperature of the first pressing block 1 behind the electrical connection point rises, the height of the memory metal 7 increases with the change in the temperature of the first pressing block 1 (the electrical connection point). When it contacts the second pressing block 8, the power is turned on, and the circuit part starts to work. The temperature data of the electrical connection point is collected through the electrical connection point temperature sensor for accurate judgment and early warning of the temperature of the electrical connection point. When the temperature of the electrical connection point returns to normal, the height of the memory metal 7 drops, and the power circuit is disconnected, returning to a non-power-consuming state.

[0049] The relationship between the height change of the memory metal 7 and the temperature is shown in the following formula:

[0050] ΔL = α * ΔT * L0

[0051] Where ΔL is the height change of the memory metal 7, ΔT is the temperature change, L0 is the initial height of the memory metal 7, and α is the thermal expansion coefficient of the memory metal 7, which is determined by the material properties. Therefore, the height of the memory metal 7 and the spacer block can be appropriately set according to the warning threshold of the temperature to be monitored.

[0052] Furthermore, the temperature monitor provided in this embodiment further includes: a second temperature sensing element 6;

[0053] The second temperature sensing element 6 is mounted on the second pressing block 8 , wherein the second temperature sensing element 6 is used to collect ambient temperature data. Similarly, the power lead of the second temperature sensing element 6 is connected to the second pressing block 8 .

[0054] More specifically, the first pressing block 1 and the second pressing block 8 are metal pressing blocks.

[0055] More specifically, the insulating and heat-insulating pad 4 is a polytetrafluoroethylene pad.

[0056] More specifically, the first temperature sensing element 2 and the second temperature sensing element 6 are both NTC thermistor sensors.

[0057] More specifically, the memory metal 7 is nickel-titanium alloy or copper-zinc-aluminum alloy.

[0058] It should be noted that, in this embodiment, the first pressing block 1 and the second pressing block 8 can be made of metal materials with excellent thermal conductivity and electrical conductivity, such as copper, aluminum and other materials; the insulating heat-insulating pad 4 can be made of materials with large insulation performance and thermal resistance, such as polytetrafluoroethylene and other materials; the memory metal 7 material needs to be fixed on the first pressing block 1, and the particles are made of materials with large thermal expansion coefficient or alloy materials such as nickel-titanium alloy or copper-zinc-aluminum alloy and other materials; the temperature sensor can be an NTC thermistor sensor, and the power supply and sensor leads are insulated and then led out.

[0059] With this solution, the two pressure blocks and the memory metal 7 simultaneously serve as temperature sensors and power temperature control switches. When the electrical equipment is operating normally, the power supply is disconnected. Only when the temperature of the electrical equipment is abnormal does the power supply come back online, significantly reducing the overall power consumption of the device. This enables the use of large-capacity outdoor batteries and solves the power supply problem. Furthermore, by providing both electrical connection point temperature sensors and ambient temperature sensors, interference from ambient temperature and misjudgment of abnormal electrical connection point temperatures can be effectively eliminated, improving temperature monitoring accuracy.

[0060] The above is a detailed description of a temperature monitoring and early warning device and a temperature monitor embodiment provided by the present application. The following is a detailed description of a temperature monitoring and early warning method embodiment provided by the present application.

[0061] See also Figure 3 The present application provides a temperature monitoring and early warning method, which is applied to the temperature monitoring and early warning device provided in the above embodiment, and includes:

[0062] Step 101: When it is detected that the first temperature sensing element is powered on, receiving the temperature data of the electrical connection point collected by the first temperature sensing element;

[0063] Step 102: Determine the temperature monitoring and early warning result based on the temperature data of the electrical connection point.

[0064] Furthermore, when the temperature monitor includes a second temperature sensing element, it further includes:

[0065] Step 1011: When it is detected that the second temperature sensing element is powered on, receiving ambient temperature data collected by the second temperature sensing element;

[0066] In contrast, when step 1011 is present, the process of step 102 may be changed to:

[0067] Step 1021: Determine a temperature monitoring and early warning result based on a comparison result between the electrical connection point temperature data and the ambient temperature data.

[0068] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0069] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the above embodiments, or to make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A temperature monitor for electrical equipment, characterized in that: include: A first pressing block, a second pressing block, a memory metal and an insulating heat-insulating pad, wherein the first pressing block and the second pressing block are made of electrically conductive and heat-conductive materials; The first pressing block and the second pressing block are separated and fixed by the insulating and heat-insulating pad, and both the first pressing block and the second pressing block are equipped with power leads; The memory metal is assembled between the first pressing block and the second pressing block and is in contact with the first pressing block; A first temperature sensing element is mounted on the first pressing block, wherein the first temperature sensing element is used to collect temperature data of the electrical connection point.

2. A temperature monitor for electrical equipment according to claim 1, characterized in that: Also includes: a second temperature sensing element; The second temperature sensing element is assembled on the second pressing block, wherein the second temperature sensing element is used to collect ambient temperature data.

3. The temperature monitor for electrical equipment according to claim 1, characterized in that: The first pressing block and the second pressing block are specifically metal pressing blocks.

4. A temperature monitor for electrical equipment according to claim 1, characterized in that: The insulating and heat-insulating pad is specifically a polytetrafluoroethylene pad.

5. The temperature monitor for electrical equipment according to claim 2, characterized in that: The first temperature sensing element and the second temperature sensing element are both NTC thermistor sensors.

6. The temperature monitor for electrical equipment according to claim 1, characterized in that: The memory metal is specifically nickel-titanium alloy or copper-zinc-aluminum alloy.

7. A temperature monitoring and early warning device, characterized in that: include: A power supply module, a processor module, and a temperature monitor according to any one of claims 1 to 6; The power supply module is electrically connected to the power supply leads of the first pressing block and the second pressing block in the temperature monitor and the power supply lead of the processor module; The first data lead of the processor module is connected to the data lead of the first temperature sensing element in the temperature monitor, and is used to receive the electrical connection point temperature data collected by the first temperature sensing element, and determine the temperature monitoring early warning judgment result based on the electrical connection point temperature data.

8. A temperature monitoring and early warning device according to claim 7, characterized in that: When the temperature monitor includes a second temperature sensing element, it further includes: The second data lead of the processor module is connected to the data lead of the second temperature sensing element in the temperature monitor, and is used to receive the ambient temperature data collected by the second temperature sensing element, and determine the temperature monitoring early warning judgment result based on the electrical connection point temperature data and the ambient temperature data.

9. A temperature monitoring and early warning method, applied to the temperature monitoring and early warning device according to claim 6, characterized in that: include: When it is detected that the first temperature sensing element is powered on, receiving the temperature data of the electrical connection point collected by the first temperature sensing element; A temperature monitoring and early warning determination result is determined based on the temperature data of the electrical connection point.

10. A temperature monitoring and early warning method according to claim 9, characterized in that: When the temperature monitor includes a second temperature sensing element, it further includes: When detecting that the second temperature sensing element is powered on, receiving ambient temperature data collected by the second temperature sensing element; Determining the temperature monitoring warning result according to the electrical connection point temperature data specifically includes: A temperature monitoring and early warning determination result is determined based on a comparison result of the electrical connection point temperature data and the ambient temperature data.

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