CN219179435U - Subsystem and equipment for high-precision aging test of temperature fuse - Google Patents

Abstract

The subsystem for high-precision aging test of the temperature fuse comprises three heat conduction surrounding bodies which are sequentially sleeved in a shell from outside to inside, wherein each heat conduction surrounding body is respectively surrounded and combined by heat conduction sheets to form an openable sealing containing cavity, and the three heat conduction surrounding bodies form three heat conduction chambers which are stacked after being closed; the heat conductivity of the heat conduction materials adopted by the heat conduction sheets of the three layers of heat conduction surrounding bodies from outside to inside is from low to high, the heat conduction material of the heat conduction surrounding body positioned at the outermost layer is fireproof bricks, the heat conduction material of the heat conduction surrounding body positioned at the middle layer is ceramic, and the heat conduction material of the heat conduction surrounding body positioned at the innermost layer is aluminum; the heating element is arranged on the inner side of the heat conduction surrounding body of the outermost layer, the temperature fuse is placed in the heat conduction surrounding body of the innermost layer, and the temperature sensor is arranged in the heat conduction surrounding body of the innermost layer. The temperature accuracy of the utility model can reach 0.5 ℃, the testing accuracy and the product accuracy can be improved, and the utility model has high product detection performance.

Description

Subsystem and equipment for high-precision aging test of temperature fuse

Technical Field

The utility model relates to the field of test equipment, in particular to high-precision aging test equipment for a temperature fuse.

Background

The aging test of the temperature fuse is usually carried out by using oven equipment, the temperature control principle of the oven is a forced air supply circulation mode, a wind source drives a wind wheel to pass through an electric heater by the operation of a circulation motor, hot air is sent into the oven from an air duct, the used hot air is sucked into the air duct to become the wind source for recirculating heating, energy loss occurs and temperature fluctuation in the oven is generated due to the flowing of the wind source, and the temperature precision in the oven is usually 2 ℃. Because the precision requirement of the temperature fuse products is higher, the temperature of the temperature fuse products is required to reach 0.5 ℃, and the aging test of oven equipment cannot accurately reflect the performance of the products.

Disclosure of Invention

The utility model aims to provide high-precision aging test equipment for a temperature fuse, which can be used for testing the temperature precision to reach the level of 0.5 ℃, can improve the test precision and the product precision, and has high product detection performance.

In order to achieve the above object, the solution of the present utility model is:

the subsystem for high-precision aging test of the temperature fuse comprises three heat conduction surrounding bodies which are sequentially sleeved in a shell from outside to inside, wherein each heat conduction surrounding body is respectively surrounded and combined by heat conduction sheets to form an openable sealing containing cavity, and the three heat conduction surrounding bodies form three heat conduction chambers which are stacked after being closed; the heat conductivity of the heat conduction materials adopted by the heat conduction sheets of the three layers of heat conduction surrounding bodies from outside to inside is from low to high, the heat conduction material of the heat conduction surrounding body positioned at the outermost layer is fireproof bricks, the heat conduction material of the heat conduction surrounding body positioned at the middle layer is ceramic, and the heat conduction material of the heat conduction surrounding body positioned at the innermost layer is aluminum; the heating element is arranged on the inner side of the heat conduction surrounding body of the outermost layer, the temperature fuse is placed in the heat conduction surrounding body of the innermost layer, and the temperature sensor is arranged in the heat conduction surrounding body of the innermost layer.

Further, a thermal fuse is connected in series with the heating element of the subsystem.

Further, the three heat conduction surrounding bodies are a first heat conduction surrounding body, a second heat conduction surrounding body and a third heat conduction surrounding body in sequence from outside to inside, the first heat conduction surrounding body and the third heat conduction surrounding body respectively form a sealing box body with an openable cover body, the sealing box body comprises a ring side face, the second heat conduction surrounding body forms a cover body, and the second heat conduction surrounding body is located between the ring side faces of the first heat conduction surrounding body and the third heat conduction surrounding body.

Further, the heating element is a heating wire, the heating wire is buried in the inner surface of the middle of the side face of the ring formed by the first heat conduction surrounding body, and the temperature sensor extends into the third heat conduction surrounding body through the through hole.

Further, the thickness of the three heat conducting surrounding bodies from outside to inside is from thick to thin.

Further, the first heat conduction surrounding body comprises a square first box body and a first cover body which can be opened and closed; the second heat conduction surrounding body forms a square frame body and is positioned in the first box body; the third heat conduction surrounding body comprises a square third box body, a openable third cover body is matched with the square third box body, and the third box body is located in the square frame body of the second heat conduction surrounding body.

Further, the first box body and the third box body respectively comprise four side plates which extend upwards on a bottom plate to form an inner container, a square notch is formed in the middle of the inner container, and the second heat conduction surrounding body comprises four middle side plates which are surrounded; the dimensions of each side plate of the first box were 0.224 x 0.182 x 0.047m, the dimensions of each middle side plate of the second thermally conductive enclosure were 0.11 x 0.125 x 0.006m, and the dimensions of each side plate of the third box were 0.075 x 0.104 x 0.003m.

Further, the intelligent temperature control system comprises at least one subsystem, a plurality of subsystems are connected in parallel, heating elements of the subsystems are connected in parallel in a circuit, a monitoring system is further connected in the circuit, temperature sensors of the subsystems are connected with temperature controllers, and the temperature controllers are connected to the monitoring system.

Further, the monitoring system comprises a supporting frame, wherein the subsystem is arranged on the supporting frame, and the monitoring system is a monitor arranged on the supporting frame.

After the structure is adopted, when the aging test equipment is used for aging test of the temperature fuse, as a three-layer-by-layer heat conduction space is formed, the heat conductivity of the heat conduction material adopted by the three-layer heat conduction surrounding body from outside to inside is low to high, so that the heat of the heating wire can be gathered before the outer layer and then is uniformly and slowly transferred to the middle layer, the middle layer uniformly and slowly transfers the heat to the innermost layer for the second time, the innermost layer can uniformly stabilize the internal temperature of the inner layer through internal air, the temperature fluctuation is reduced, the energy loss is not influenced by the outside in the three-layer heat conduction, the temperature precision entering the innermost layer can reach 0.5 ℃, the test temperature precision can be greatly improved, the test precision and the product precision are improved, and the product detection performance is very high.

Drawings

FIG. 1 is a schematic diagram of a subsystem of one of the high-precision burn-in test apparatus of the present utility model (with a housing omitted);

FIG. 2 is an exploded view of the subsystems of the high-precision burn-in apparatus of the present utility model;

FIG. 3 is a schematic cross-sectional view of a subsystem of the high-precision burn-in apparatus of the present utility model (with the housing omitted);

FIG. 4 is a schematic diagram of the overall structure of the burn-in apparatus of the present utility model;

FIG. 5 is a schematic diagram of the circuit wiring of the burn-in apparatus of the present utility model;

FIG. 6 is a temperature accuracy record of the high accuracy burn-in test apparatus for temperature fuses provided by the present utility model;

fig. 7 is a temperature accuracy record of a conventional oven.

Detailed Description

In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.

The utility model discloses a high-precision aging test subsystem of a temperature fuse, which comprises three heat conduction surrounding bodies sleeved in a shell from outside to inside in sequence, wherein each heat conduction surrounding body is respectively formed into an openable sealing containing cavity through surrounding combination of heat conduction sheets, the three heat conduction surrounding bodies form three heat conduction chambers stacked according to layers after being closed, and the temperature fuse (not shown in the figure) can be placed into the heat conduction surrounding body of the innermost layer for aging test.

Specifically, as shown in connection with fig. 1-3, the housing 1 may include a cover 12 over a box 11, and the housing 1 may be made of a ferrous material. The three heat conduction surrounding bodies are a first heat conduction surrounding body 2, a second heat conduction surrounding body 3 and a third heat conduction surrounding body 4 in sequence from outside to inside, and each heat conduction surrounding body can be respectively surrounded and combined by a plurality of heat conduction sheets to form a sealed cavity capable of being opened and closed. The first heat conducting surrounding body 2 and the third heat conducting surrounding body 4 can respectively form a sealing box body with an openable cover body, the sealing box bodies comprise annular side surfaces, the second heat conducting surrounding body 3 can directly form a cover body, and the second heat conducting surrounding body 3 can be directly placed between the annular side surfaces of the first heat conducting surrounding body 2 and the third heat conducting surrounding body 4. In this embodiment, the first heat-conducting enclosure 2 forms a square sealing body, which includes a square first box 21 with a first cover 22 that can be opened and closed, the first box 21 includes a bottom plate 211 with four side plates 212 extending upwards to form a liner, and a square notch 213 is formed in the middle of the liner. The second heat-conducting enclosure 3 forms a square frame body and is located in the notch 213 of the first box body, and the second heat-conducting enclosure 3 may include four middle side plates 31. The third heat conducting enclosure 4 comprises a square third box body 41, a openable third cover body 42 is matched on the square third box body 41, and the third box body 41 is positioned in the square frame body of the second heat conducting enclosure 3. The third case 41 also includes four side plates 412 extending upward on a bottom plate 411 to form a container in which the temperature fuse can be placed, and then the third cover 42 is covered.

In order to form heat conduction, the inner side of the first heat conduction surrounding body of the outermost layer is provided with a heating element, the heating element in the embodiment is a heating wire 5, and the heating wire 5 can be buried in the middle inner surface of the side face of the ring formed by the first heat conduction surrounding body. The heating wire 5 in this embodiment is wound around the middle of the inner wall surfaces of the four side plates 212 of the first case 21, and the heat of the heating wire 5 can be uniformly radiated outwards and conducted inwards. Meanwhile, as the temperature fuse is placed in the third heat conduction surrounding body 4 of the innermost layer, a temperature sensor 6 is arranged in the third heat conduction surrounding body 4 and is used for feedback and control after detecting the temperature in the third heat conduction surrounding body 4. The temperature sensor 5 can protrude through the through-hole into the interior of the third heat-conducting enclosure 4 of the innermost layer. Further, a thermal link 7 is connected in series with the heating element (heating wire) of each subsystem, and the thermal link 7 can cut off the loop when the heating wire is short-circuited, so that the circuit safety protection is realized.

In the utility model, in order to make the temperature of the aging test more accurate, the heat conductivity of the heat conducting material adopted by the heat conducting sheet of the three-layer heat conducting surrounding body from outside to inside is from low to high, so that heat can be gathered before the outer layer, and then the heat is conducted inwards step by step, and the temperature fluctuation is reduced. Specifically, in this embodiment, the heat conducting material of the first heat conducting enclosure body 2 located at the outermost layer may be refractory bricks, so that the first heat conducting enclosure body 2 forms a refractory brick liner in the housing; the heat conducting material of the second heat conducting surrounding body 3 positioned in the middle layer can be ceramic, so that the second heat conducting surrounding body 3 forms a ceramic cover; and the heat conducting material of the third heat conducting surrounding body 4 positioned at the innermost layer can be aluminum, and the third heat conducting surrounding body 4 forms an aluminum box. The thermal conductivity of the refractory brick is generally about 0.35W/(m.cndot.) C, the thermal conductivity of the ceramic is generally about 15W/(m.cndot.) C, and the thermal conductivity of the aluminum is generally about 237W/(m.cndot.) C. The thickness of the three heat-conducting enclosures from the outside to the inside can also be set from thick to thin. In this embodiment, each of the heat-conducting enclosures forms a square shape, so that the dimension of each side plate 212 of the first case 21 is 0.224×0.182×0.047m (length×width×thickness), the dimension of each middle side plate 31 of the second heat-conducting enclosure 3 is 0.11×0.125×0.006m (length×width×thickness), and the dimension of each side plate 412 of the third case 41 of the third heat-conducting enclosure 4 is 0.075×0.104×0.003m (length×width×thickness). Of course, the heat-conducting enclosures may be formed in other shapes, such as a cylindrical or polygonal cross-section box, and the heat-conducting enclosures located in the middle layer may be formed in the form of a box.

After adopting above-mentioned structure, when temperature fuse product put into the third box body 41 of third heat conduction bounding box 4 and carry out ageing tests, the power supply gives heater strip 5, heater strip 5 is refractory brick inner bag (first heat conduction bounding box) through one deck heat conduction, two-layer heat conduction is ceramic cover (second heat conduction bounding box), three-layer heat conduction is aluminium box (third heat conduction bounding box), the heat of heater strip 5 is evenly slowly transmitted to the ceramic cover by refractory brick inner bag like this, the even slow heat of transmission of ceramic cover secondary reaches the aluminium box, the aluminium box evenly stabilizes its inside temperature through inside air. In the three-layer heat conduction, no external influence energy loss exists, and thus the temperature accuracy entering the aluminum box can reach 0.5 ℃.

The utility model also discloses a high-precision aging test device for the temperature fuse, which is shown in combination with fig. 4 and 5 and comprises at least one subsystem, wherein 6 subsystems are arranged in the embodiment, the 6 subsystems are connected in parallel, heating elements (heating wires) of the subsystems are connected in parallel in a circuit, and the 6 subsystems are connected into a control system and a monitoring system. The circuit is also connected with a monitoring system 81, the monitoring system 81 can be a monitor, the control system comprises temperature controllers 82 connected with temperature sensors of all subsystems, and all the temperature controllers are connected to the monitoring system 82. The monitor can monitor and feed back signals in real time, and when the temperature difference occurs in the temperature controller 82, the heating of the heating wire 5 can be adjusted. The device for testing can comprise a supporting frame 9, and a plurality of subsystems and monitors are placed on the supporting frame 9.

When the character subsystem and the testing equipment of the utility model perform testing work, the box cover 12 of the shell 1 is opened, the first cover body 21 of the first heat conduction surrounding body 2 and the third cover body 42 of the third heat conduction surrounding body 4 are continuously opened, and after a temperature fuse (not shown in the figure) is placed in the third box body 41, the sealing subsystem is covered. When the aging test is started, the power supply supplies power to the heating wire 5, the heat of the heating wire 5 is uniformly and slowly transferred to the second heat conduction surrounding body 3 from the first heat conduction surrounding body 2 at the outer side, the second heat conduction surrounding body 3 uniformly and slowly transfers the heat to the third heat conduction surrounding body 4 for the second time, the third heat conduction surrounding body 4 can uniformly stabilize the internal temperature through the internal air, and the temperature accuracy of entering the third heat conduction surrounding body 4 can reach 0.5 ℃. The monitoring system 81 monitors and feeds back signals in real time, so that high-precision aging test is carried out, and the test precision required by products is achieved. When the test equipment works, if the heating wire 5 is short-circuited due to fatigue effect of long-term work, the temperature of the loop is abnormally increased, and when the thermal fuse 7 senses the temperature abnormality, the thermal fuse can start to act to cut off the loop, so that the problem of short circuit of any form is avoided, and the safety performance of the equipment is ensured.

As shown in fig. 6 and 7, which are data of laboratory tests, are temperature test data of a position in a third heat conduction enclosure body, namely temperature test data of a product placement position, fig. 6 is temperature precision record of the high-precision ageing test equipment for a temperature fuse provided by the utility model, and as can be seen from fig. 6, under one test point (one temperature test point of the position in the third heat conduction enclosure body), the recorded temperature range is 198.97 ℃ -199.21 ℃ (one record line below), and the temperature precision can reach 0.24 ℃; under another test point, the recorded temperature range is 199.81-200.10 ℃ (one record line above), and the temperature accuracy can reach 0.29 ℃. FIG. 7 is a temperature accuracy record of a typical oven, at a first test point, at a temperature range of 194.7C to 196.53C, with a temperature accuracy of 1.83C; at the second test point and the third test point, the recorded temperature ranges from 195.97 ℃ to 197.85 ℃ and the temperature is 1.88 ℃ in precision; at the fourth test point, the recorded temperature range is 197.65-200.20 ℃ and the temperature accuracy is 2.55 ℃. From the two sets of recorded data, it is evident that: the temperature precision of the high-precision aging test equipment for the temperature fuse provided by the utility model can be within 0.5 ℃ and is superior to that of a common oven.

Standard parts used in the utility model can be purchased from the market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of the parts adopt conventional means such as mature bolts, rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that the details are not described.

The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.

Claims (9)

1. A subsystem for high-precision aging test of a temperature fuse is characterized in that: three heat conduction surrounding bodies are sleeved in a shell from outside to inside in sequence, each heat conduction surrounding body is respectively surrounded and combined through heat conduction sheets to form an openable sealed cavity, and the three heat conduction surrounding bodies form three heat conduction chambers which are stacked after being closed; the heat conductivity of the heat conduction materials adopted by the heat conduction sheets of the three layers of heat conduction surrounding bodies from outside to inside is from low to high, the heat conduction material of the heat conduction surrounding body positioned at the outermost layer is fireproof bricks, the heat conduction material of the heat conduction surrounding body positioned at the middle layer is ceramic, and the heat conduction material of the heat conduction surrounding body positioned at the innermost layer is aluminum; the heating element is arranged on the inner side of the heat conduction surrounding body of the outermost layer, the temperature fuse is placed in the heat conduction surrounding body of the innermost layer, and the temperature sensor is arranged in the heat conduction surrounding body of the innermost layer.

2. A temperature fuse high precision burn-in subsystem as recited in claim 1, wherein: the heating element of the subsystem is connected in series with a thermal fuse.

3. A temperature fuse high precision burn-in subsystem as claimed in claim 1 or 2, wherein: the three heat conduction surrounding bodies are a first heat conduction surrounding body, a second heat conduction surrounding body and a third heat conduction surrounding body from outside to inside in sequence, the first heat conduction surrounding body and the third heat conduction surrounding body form a sealing box body with an openable cover body respectively, the sealing box body comprises a ring side face, the second heat conduction surrounding body forms a cover body, and the second heat conduction surrounding body is located between the ring side faces of the first heat conduction surrounding body and the third heat conduction surrounding body.

4. A temperature fuse high precision burn-in subsystem as recited in claim 3, wherein: the heating element is a heating wire, the heating wire is buried in the inner surface of the middle part of the side surface of the ring formed by the first heat conduction surrounding body, and the temperature sensor stretches into the third heat conduction surrounding body through the through hole.

5. A temperature fuse high precision burn-in subsystem as recited in claim 1, wherein: the thickness of the three heat conduction surrounding bodies from outside to inside is from thick to thin.

6. A thermal fuse high-precision burn-in subsystem as recited in claim 3, wherein: the first heat conduction surrounding body comprises a square first box body and a first openable cover body matched with the square first box body; the second heat conduction surrounding body forms a square frame body and is positioned in the first box body; the third heat conduction surrounding body comprises a square third box body, a openable third cover body is matched with the square third box body, and the third box body is located in the square frame body of the second heat conduction surrounding body.

7. The thermal fuse high precision burn-in subsystem of claim 6, wherein: the first box body and the third box body respectively comprise four side plates which extend upwards on a bottom plate to form an inner container, a square notch is formed in the middle of the inner container, and the second heat conduction surrounding body comprises four middle side plates which are surrounded; the dimensions of each side plate of the first box were 0.224 x 0.182 x 0.047m, the dimensions of each middle side plate of the second thermally conductive enclosure were 0.11 x 0.125 x 0.006m, and the dimensions of each side plate of the third box were 0.075 x 0.104 x 0.003m.

8. A high-precision aging test device for a temperature fuse is characterized in that: comprising at least one subsystem according to claim 1 or 2, wherein a plurality of subsystems are connected in parallel, the heating elements of each subsystem are connected in parallel in a circuit, a monitoring system is also connected in the circuit, the temperature sensor of each subsystem is connected with a temperature controller, and each temperature controller is connected with the monitoring system.

9. The high-precision burn-in apparatus for a thermal fuse of claim 8, wherein: the monitoring system comprises a supporting frame, wherein the subsystem is arranged on the supporting frame, and the monitoring system is a monitor arranged on the supporting frame.

Images