A portable over-temperature testing device
Patent Information
- Application Number
- CN202522101651.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-29
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-09-29
AI Technical Summary
[0008]本实用新型的目的是提供一种便携式超温试验装置，以解决现有试验技术无法兼顾安全、高效与精准的试验要求的技术问题
本实用新型提供的便携式超温试验装置，首先，安全性高，采用无明火加热方式，从根本上杜绝明火风险，尤其适用于煤矿、石油化工等存在瓦斯或可燃气体的特殊危险环境；其次，加热效率显著提升，通电后，可在2-3分钟内迅速升温至目标温度（如113℃），试验周期较传统方法缩短80%以上；再次，控温精准可靠，通过温度测量计实时监测并显示温度，有效避免因温度偏差导致的试验误判；最后，结构轻便、操作简便，装置整体紧凑轻巧，便于携带，坚固耐用，显著提升了现场测试的便捷性与可靠性。
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Figure CN224906934U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical equipment testing technology, and in particular to a portable over-temperature testing device. Background Technology
[0002] With increasingly stringent requirements for protection devices and testing of large coal mine equipment, the reliability of over-temperature protection systems has become crucial for ensuring safe equipment operation. Currently, the main over-temperature protection testing methods used in the field include: 1. Boiling water test method: By heating water to boiling to generate high-temperature steam, the temperature sensor is heated to simulate an over-temperature environment.
[0003] 2. Physical iron-burning method: Use an open flame or heating equipment to preheat a metal block (such as an iron block) for a long time, and then bring the high-temperature metal block close to a temperature sensor to simulate an overheated environment.
[0004] The above-mentioned traditional methods have the following shortcomings in practical applications: 1. Limited temperature range and poor test results: Due to the boiling point of water, the maximum temperature of the boiling water test method can only reach 100℃, which cannot meet the test requirements of 113℃ and above. At the same time, the water temperature drops rapidly, making it impossible to maintain a stable high-temperature environment, resulting in low reliability of the test results.
[0005] 2. There are safety hazards from open flames, and the applicable locations are limited: The physical iron burning method requires long-term preheating with open flames, which poses a fire hazard during the process. It is strictly prohibited to use it, especially in areas where coal mine gas accumulates, which severely limits its application scenarios and poses an extremely high safety risk.
[0006] 3. Uncontrollable heating temperature and low measurement accuracy: Existing methods cannot achieve real-time and accurate temperature control and monitoring of the heating source. Operators can only rely on feedback from the tested sensor to indirectly judge the temperature, which is inaccurate, easily leads to experimental errors, and cannot verify the accuracy of the over-temperature protection system.
[0007] Existing technologies cannot simultaneously meet the testing requirements of safety, efficiency, and accuracy. Therefore, it is urgent to provide a portable over-temperature testing device that can meet these requirements. Utility Model Content
[0008] The purpose of this invention is to provide a portable over-temperature testing device to solve the technical problem that existing testing technologies cannot simultaneously meet the requirements of safety, efficiency, and accuracy.
[0009] This utility model provides a portable over-temperature testing device, which includes: an electric heating coil, which forms a heating space inside the electric heating coil after being energized; A base plate, on which the heating coil is located; a first limiting member and a second limiting member are provided on the base plate within the heating space; a power interface assembly, electrically connected to the heating coil, for connecting an external power source and supplying power to the heating coil; a temperature measuring instrument, the probe of which is located in the heating space and limited by the first limiting member; and a temperature sensor for an over-temperature protection system, the probe of which is located in the heating space and limited by the second limiting member.
[0010] During operation, after connecting the power interface component to 220V AC power, electrical energy is continuously supplied to the heating coil, causing it to heat up rapidly and form a relatively uniform and temperature-stable heating space around it. A temperature measuring instrument monitors the temperature changes within this space in real time. When the monitored temperature reaches and stabilizes at a preset target value (e.g., 113℃), the portable over-temperature testing device is in test-ready state. At this time, the operator inserts the temperature sensor of the over-temperature protection system into the heating space, ensuring that the sensing part of the sensor is fully exposed. Under high temperature, the internal temperature sensing element of the over-temperature protection system's temperature sensor triggers a response. Since the over-temperature protection system is part of the device under test, this change is detected by the internal control unit of the device under test and judged as an over-temperature state, thus triggering an over-temperature alarm or emergency shutdown function. This response effectively verifies the accuracy and reliability of the over-temperature protection function of the device under test under over-temperature conditions.
[0011] Optionally, the first limiting component includes a first fixing rod and a first limiting ring, the bottom end of the first fixing rod is located on the base plate, and the first limiting ring is fixed to the first fixing rod; the probe of the temperature measuring instrument is inserted into the first limiting ring.
[0012] Optionally, the first limiting member includes a plurality of first limiting rings, which are fixed at intervals on the first fixing rod in a direction perpendicular to the base plate.
[0013] Optionally, the second limiting component includes a second fixing rod and a second limiting ring. The bottom end of the second fixing rod is fixed to the base plate, and the second limiting ring is fixed to the upper part of the second fixing rod. The probe of the temperature sensor is inserted into the second limiting ring.
[0014] Optionally, the second limiting member includes a plurality of second limiting rings, which are fixed at intervals on the second fixing rod in a direction perpendicular to the base plate.
[0015] Optionally, the portable over-temperature testing device further includes: a heat-insulated handle, which is fixedly connected to the base plate.
[0016] Optionally, the heat-insulating handle includes a grip portion and an extension portion, the bottom end of the extension portion is fixed to the base plate, and the upper end of the extension portion is fixedly connected to the grip portion.
[0017] Optionally, a heat insulation layer and an anti-slip layer are sequentially provided on the outside of the grip.
[0018] Optionally, the heating coil is a ceramic heating coil.
[0019] The beneficial effects of this utility model include: The portable overheat testing device provided by this utility model offers several advantages. First, it boasts high safety by employing a flameless heating method, fundamentally eliminating the risk of open flames. This makes it particularly suitable for hazardous environments such as coal mines and petrochemical plants where methane or flammable gases are present. Second, it significantly improves heating efficiency, rapidly raising the temperature to the target temperature (e.g., 113°C) within 2-3 minutes after power-on, shortening the testing cycle by more than 80% compared to traditional methods. Third, it provides precise and reliable temperature control, with real-time monitoring and display of the temperature via a temperature measuring instrument, effectively avoiding misjudgments caused by temperature deviations. Finally, it features a lightweight and easy-to-operate design. The device is compact, lightweight, portable, robust, and durable, significantly enhancing the convenience and reliability of on-site testing. Attached Figure Description
[0020] Figure 1 This is a schematic diagram showing the overall structure of the present invention.
[0021] Figure 2 This represents a partial structural cross-sectional view in one embodiment.
[0022] In the diagram: 1-Heating coil, 2-Base plate, 3-Power interface assembly, 4-Temperature measuring instrument, 5-First limiting component, 51-First fixing rod, 52-First limiting ring, 6-Second limiting component, 61-Second fixing rod, 62-Second limiting ring, 7-Heat-insulated handle, 8-Temperature sensor. Detailed Implementation
[0023] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0024] One embodiment of this application provides a portable over-temperature testing device, referencing... Figure 1 and Figure 2 A portable over-temperature testing device is used to test an over-temperature protection system. The over-temperature protection system includes a temperature sensor 8. The portable over-temperature testing device includes: An electric heating coil 1, which forms a heating space inside the electric heating coil 1 after being energized; The base plate 2, on which the heating coil 1 is located; the base plate 2 is provided with a first limiting member 5 and a second limiting member 6 within the heating space; A power interface assembly 3 is electrically connected to the heating coil 1, used to connect to an external power source and supply power to the heating coil 1. Temperature measuring instrument 4, the probe of which is located in the heating space and is limited by the first limiting member 5; The temperature sensor 8 of the over-temperature protection system has its probe located in the heating space and limited by the second limiting member 6.
[0025] The portable overheat testing device provided by this utility model offers several advantages. First, it boasts high safety by employing a flameless heating method, fundamentally eliminating the risk of open flames. This makes it particularly suitable for hazardous environments such as coal mines and petrochemical plants where methane or flammable gases are present. Second, it significantly improves heating efficiency, rapidly raising the temperature to the target temperature (e.g., 113°C) within 2-3 minutes after power-on, shortening the testing cycle by more than 80% compared to traditional methods. Third, it provides precise and reliable temperature control, with real-time monitoring and display of the temperature via a temperature measuring instrument, effectively avoiding misjudgments caused by temperature deviations. Finally, it features a lightweight and easy-to-operate design. The device is compact, lightweight, portable, robust, and durable, significantly enhancing the convenience and reliability of on-site testing.
[0026] In one specific embodiment, reference Figure 1 and Figure 2 The first limiting member 5 includes a first fixing rod 51 and a first limiting ring 52. The bottom end of the first fixing rod 51 is located on the base plate 2, and the first limiting ring 51 is fixed to the first fixing rod 52. The probe of the temperature measuring instrument 4 is inserted into the first limiting ring 52.
[0027] In one specific embodiment, reference Figure 1 and Figure 2 The first limiting member 5 includes a first fixing rod 51 and a plurality of first limiting rings 52, and the plurality of first limiting rings 52 are fixed at intervals on the first fixing rod 51 in a direction perpendicular to the base plate 2.
[0028] Specifically, during operation, the operator inserts the probe of the temperature measuring instrument 4 into one or more of the first limiting rings 52. Through the positioning function of the first limiting member 5, the temperature sensing part of the probe of the temperature measuring instrument 4 is precisely constrained to a predetermined position within the heating space, thereby effectively avoiding measurement errors caused by the probe of the temperature measuring instrument 4 shifting or shaking, and ensuring the stability and repeatability of temperature detection.
[0029] In one specific embodiment, the first fixing rod 51 is a first metal fixing rod, and the first limiting ring 52 is a first metal limiting ring. The first metal limiting member and the first metal limiting ring can be made of a metal material with high heat resistance.
[0030] In other embodiments, the first fixing rod 51 and the first limiting ring 52 may be made of insulating material.
[0031] In one specific embodiment, the first fixing rod 51 and the first limiting ring 52 are made of the same material. In other embodiments, the first fixing rod 51 and the first limiting ring 52 are made of different materials.
[0032] In one specific embodiment, reference Figure 1 and Figure 2 The second limiting member 6 includes a second fixing rod 61 and a second limiting ring 62. The bottom end of the second fixing rod 61 is fixed to the base plate 2, and the second limiting ring 62 is fixed to the second fixing rod 61. The probe of the temperature sensor 8 is inserted into the second limiting ring 62.
[0033] In one specific embodiment, reference Figure 1 , Figure 2 The second limiting member 6 includes a second fixing rod 61 and a plurality of second limiting rings 62, and the plurality of second limiting rings 62 are fixed at intervals on the second fixing rod 61 in a direction perpendicular to the base plate 2.
[0034] Specifically, during operation, the probe of the temperature sensor 8 of the over-temperature protection system is inserted into one or more of the second limiting rings 62. Through the positioning function of the second limiting member 6, the temperature sensing part of the probe of the temperature sensor 8 is precisely constrained to a predetermined position within the heating space, thereby effectively avoiding measurement errors caused by the probe of the temperature sensor 8 shifting or shaking, and ensuring the stability and repeatability of temperature detection.
[0035] In one specific embodiment, the second fixing rod 61 is a second metal fixing rod, and the second limiting ring 62 is a second metal limiting ring. The second metal limiting member and the second metal limiting ring can be made of a metal material with high heat resistance.
[0036] In other embodiments, the second fixing rod 61 and the second limiting ring 62 may be made of insulating material.
[0037] In one specific embodiment, the second fixing rod 61 and the second limiting ring 62 are made of the same material. In other embodiments, the second fixing rod 61 and the second limiting ring 62 are made of different materials.
[0038] In one specific embodiment, reference Figure 1 The portable over-temperature testing device also includes a heat-insulated handle 7, which is fixedly connected to the base plate 2.
[0039] Specifically, the heat-insulating handle 7 is fixedly connected to the base plate 2, and the base plate 2 and the heating coil 1 and other core components are stably integrated into a portable unit, making it easy to carry and use.
[0040] In one specific embodiment, reference Figure 1 The heat-insulating handle 7 is fixedly connected to the base plate 2. The heat-insulating handle 7 includes a grip part 71 and an extension part 72. The bottom end of the extension part 72 is fixed to the base plate 2, and the upper end of the extension part 72 is fixedly connected to the grip part 71.
[0041] Specifically, during operation, the operator holds the grip 71 and, through the lever arm effect transmitted by the extension 72, can smoothly lift or move the entire portable over-temperature testing device.
[0042] In one specific embodiment, the heat-insulating handle 7 is fixedly connected to the base plate 2. The heat-insulating handle 7 includes a grip portion 71 and an extension portion 72. The bottom end of the extension portion 72 is fixed to the base plate 2, and the upper end of the extension portion 72 is fixedly connected to the grip portion 71. A heat-insulating layer and an anti-slip layer are sequentially provided on the outside of the grip portion 71.
[0043] Specifically, during operation, the operator can safely move and control the portable overheat testing device by holding the grip part 71. The grip part 71 effectively blocks heat conduction through the length of the extension part 72 and the heat insulation layer, while the anti-slip layer effectively prevents hand slippage during operation, thereby ensuring the stability of the device in high-temperature environments and the safety of operation, avoiding the risk of equipment damage or personnel burns due to accidental slippage.
[0044] In one specific embodiment, the heating coil 1 is a ceramic heating coil.
[0045] Specifically, in this embodiment, the heating coil 1 is preferably a ceramic heating coil. This coil uses high-alumina ceramic as the insulating skeleton and protective layer, and incorporates a high-resistance heating alloy wire, together forming a highly efficient heating element. Its core advantages are: the ceramic material itself possesses excellent electrical insulation and high-temperature resistance (typically withstanding temperatures above 1000℃), effectively avoiding the risk of leakage at high temperatures and ensuring operational safety; simultaneously, this structure has low thermal inertia and rapid thermal response, supporting the device to quickly form a uniform and stable heating space after being powered on, meeting the stringent requirements of the experiment for heating rate and temperature field consistency; furthermore, the ceramic material has high mechanical strength and good thermal stability, and its open coil shape not only facilitates heat field distribution but also significantly improves the structural durability and portability of the device, thereby achieving comprehensive optimization in terms of safety, efficiency, and reliability.
[0046] During operation, after connecting the power interface component to 220V AC power, electrical energy is continuously supplied to the heating coil, causing it to heat up rapidly and form a relatively uniform and temperature-stable heating space around it. A temperature measuring instrument monitors the temperature changes within this space in real time. When the monitored temperature reaches and stabilizes at a preset target value (e.g., 113℃), the portable over-temperature testing device is in test-ready state. At this time, the operator inserts the temperature sensor of the over-temperature protection system into the heating space, ensuring that the sensing part of the sensor is fully exposed. Under high temperature, the internal temperature sensing element of the over-temperature protection system's temperature sensor triggers a response. Since the over-temperature protection system is part of the device under test, this change is detected by the internal control unit of the device under test and judged as an over-temperature state, thus triggering an over-temperature alarm or emergency shutdown function. This response effectively verifies the accuracy and reliability of the over-temperature protection function of the device under test under over-temperature conditions.
[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although the embodiments of this utility model have been described in detail, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this utility model do not depart from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of protection of the claims of this utility model.
Claims
1. A portable over-temperature testing device, characterized in that, include: An electric heating coil (1) forms a heating space inside it after being energized; The base plate (2) has the heating coil (1) located on it; the base plate (2) is provided with a first limiting member (5) and a second limiting member (6) within the heating space. Power interface component (3), which is electrically connected to the heating coil (1) and is used to connect to an external power source and supply power to the heating coil (1); A temperature measuring instrument (4), the probe of which is located in the heating space and is limited by a first limiting member (5); The temperature sensor (8) of the over-temperature protection system has its probe located in the heating space and is limited by the second limiting member (6).
2. The portable over-temperature testing device according to claim 1, characterized in that, The first limiting member (5) includes a first fixing rod (51) and a first limiting ring (52). The bottom end of the first fixing rod (51) is located on the base plate (2), and the first limiting ring (51) is fixed on the first fixing rod (52). The probe of the temperature measuring instrument (4) is inserted into the first limiting ring (52).
3. The portable over-temperature testing device according to claim 2, characterized in that, The first limiting member (5) includes a plurality of first limiting rings (52), which are fixed at intervals on the first fixing rod (51) in a direction perpendicular to the base plate (2).
4. The portable over-temperature testing device according to claim 1, characterized in that, The second limiting member (6) includes a second fixing rod (61) and a second limiting ring (62). The bottom end of the second fixing rod (61) is fixed to the base plate (2), and the second limiting ring (62) is fixed to the second fixing rod (61). The probe of the temperature sensor (8) is inserted into the second limiting ring (62).
5. The portable over-temperature testing device according to claim 4, characterized in that, The second limiting member (6) includes a plurality of second limiting rings (62), which are fixed at intervals on the second fixing rod (61) in a direction perpendicular to the base plate (2).
6. The portable over-temperature testing device according to claim 1, characterized in that, Also includes: The heat-insulating handle (7) is fixedly connected to the base plate (2).
7. The portable over-temperature testing device according to claim 6, characterized in that, The heat-insulating handle (7) includes a grip (71) and an extension (72). The bottom end of the extension (72) is fixed to the base plate (2), and the upper end of the extension (72) is fixedly connected to the grip (71).
8. The portable over-temperature testing device according to claim 7, characterized in that, The grip (71) is provided with a heat insulation layer and an anti-slip layer in sequence.
9. The portable over-temperature testing device according to any one of claims 1 to 8, characterized in that, The heating coil (1) is a ceramic heating coil.