High and low temperature impact test box and test method
By using a basket unit in conjunction with a sealing component in the high and low temperature shock test chamber, the energy consumption problem caused by heat exchange in the high and low temperature zones is solved, achieving efficient and energy-saving temperature shock testing.
Patent Information
- Application Number
- CN202511865308.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-01-20
AI Technical Summary
In existing two-chamber temperature shock test chambers, the heat exchange between the high and low temperature zones during the basket lifting and switching process leads to increased energy consumption, reduced equipment operating efficiency, and high operating costs in the long term.
The suspended basket unit is used in conjunction with sealing components. The high and low temperature zones are sealed during the sliding process of the slide by the sealing plate and the limiting block. Combined with the air pump supply, rapid cooling is achieved, reducing heat exchange and energy loss.
It effectively blocks heat convection between high and low temperature zones, reduces equipment energy loss, enables rapid testing and cooling, reduces operating costs, and improves equipment efficiency.
Smart Images
Figure CN121360618A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of temperature shock test equipment, in particular to a high-low temperature shock test chamber and an experimental method. BACKGROUND
[0002] As a key environmental reliability detection device, the temperature shock test chamber is widely used in safety verification, product screening and quality control of electronic components, and plays an important role in the fields of aviation, automobile, household appliances, etc. Through simulating the rapid switching of extreme high temperature and extreme low temperature environment, the device can effectively evaluate the performance stability of the product under severe temperature change, so as to improve the overall reliability of the product.
[0003] The common temperature shock test chamber is mainly divided into two-box type and three-box type structures. Among them, the two-box type test chamber is composed of an independent high-temperature box and a low-temperature box: the high-temperature box is heated by an electric heating pipe, and the low-temperature box is cooled by a refrigeration system composed of a compressor, a condenser and an evaporator. During the test, the sample to be tested is placed in a hanging basket, which is moved back and forth between the high and low temperature boxes by a lifting mechanism to complete the alternating heat shock and cold shock test, and the response parameters of the sample after the temperature changes are collected to evaluate its tolerance performance.
[0004] However, the existing two-box type device generally adopts a hanging basket structure with a ventilation slot to ensure the temperature transfer efficiency. However, during the lifting and switching process of the hanging basket, when it passes through the transition area (interval table) between the high and low temperature boxes, due to the existence of the ventilation slot, the airflow of the high temperature zone and the low temperature zone will form a short circuit through the inside of the hanging basket, resulting in heat exchange. This process usually lasts for 5 to 8 seconds, during which the heat of the high-temperature box will be transferred into the low-temperature zone, and the cold of the low-temperature zone will also invade the high-temperature zone in the opposite direction, causing the temperature of the low-temperature chamber to rise and the temperature of the high-temperature chamber to drop.
[0005] In order to maintain the set test temperature, the refrigeration system needs to be additionally operated to compensate for the loss of cold, and the heating system also needs to be continuously heated to offset the cooling effect, resulting in significant increase in energy consumption, reduction in equipment operation efficiency, and high operation cost in long-term use. Therefore, the existing hanging basket structure, while achieving rapid temperature switching, also brings problems of large energy loss and poor temperature field stability
[0006] In view of the deficiencies of the prior art, the present application provides a high-low temperature shock test chamber and an experimental method to solve the above problems. SUMMARY
[0007] In view of the deficiencies of the prior art, the present application provides a high-low temperature shock test chamber and an experimental method to solve the above problems.
[0008] In order to achieve the above object, the present application is realized by the following technical scheme: a high-low temperature impact test chamber, comprising an outer box body, a heat insulation plate arranged on the inner wall of the outer box body, and the inner cavity of the outer box body is divided into a high temperature zone and a low temperature zone by the heat insulation plate, characterized in that: a driving unit is arranged on the outer box body, and the driving unit is drivingly connected with a hanging basket unit, and the driving unit drives the hanging basket unit to slide up and down;
[0009] The hanging basket unit comprises: a sealing element arranged below the heat insulation plate;
[0010] A hanging basket is arranged on the sealing element and is used for placing test pieces, and a ventilation hole is formed in the inner wall of the hanging basket;
[0011] A sealing plate is arranged on the inner wall of the hanging basket and slides up and down, and is used for sealing the ventilation hole;
[0012] A second electric telescopic rod is drivingly connected with the sealing plate and is used for driving the sealing plate to move up and down;
[0013] A cooling unit arranged on the outer box body is connected to the hanging basket unit, and is used for rapidly cooling the test.
[0014] Preferably, the sealing element comprises a first heat insulation sealing plate which is slidingly connected with the heat insulation plate;
[0015] Four limiting blocks are arranged at four corners of the first heat insulation sealing plate respectively, and are used for positioning the hanging basket, and four corners of the hanging basket are provided with positioning grooves matched with the limiting blocks in size, the positioning grooves provide space for the limiting blocks to be inserted, and the limiting blocks and the hanging basket form a complete hanging basket, so that the hanging basket can seal the sliding way through the heat insulation plate during the up-down movement of the hanging basket;
[0016] A sealing frame is fixedly connected with the outer side of the limiting block, and the sealing frame is sleeved around the top of the hanging basket; the first heat insulation sealing plate and the sealing frame are used for sealing the sliding way
[0017] Preferably, a temperature insulation plate is fixedly connected to the top of the sealing plate, the top of the temperature insulation plate is fixedly connected with the telescopic end of the second electric telescopic rod, so that the temperature insulation plate and the upper part of the inner wall of the hanging basket form a temperature insulation cavity, the temperature insulation cavity is used for placing the second electric telescopic rod, and a temperature sensor is fixedly connected to the center of the temperature insulation plate.
[0018] Preferably, the driving unit comprises a first electric telescopic rod arranged at the bottom of the outer box body, and the telescopic end of the first electric telescopic rod is fixedly connected with the bottom of the first heat insulation sealing plate;
[0019] A third electric push rod is fixedly connected with the outer wall of the outer box body;
[0020] A pressing plate is fixedly connected with the telescopic end of the third electric push rod.
[0021] A push rod is fixedly connected with the center of the pressing plate and fixedly connected with the top of the hanging basket.
[0022] Preferably, the top of the hanging basket is provided with a sealing unit for sealing the passage through which the hanging basket slides out of the inside of the outer box body, and the bottom of the hanging basket is provided with a sealing block for sealing the passage, and the front of the hanging basket is provided with a door plate.
[0023] The sealing unit comprises a second heat insulation sealing plate which is inserted with the outer box body and used for sealing the passage, and the second heat insulation sealing plate is in sliding connection with the push rod.
[0024] A sliding cylinder is fixedly connected with the inner wall of the second heat insulation sealing plate, and the pressing plate is in sliding connection with the surface of the sliding cylinder.
[0025] A spring is sleeved on the outside of the sliding cylinder and arranged between the pressing plate and the second heat insulation sealing plate.
[0026] A sliding rod is in sliding connection with the inside of the sliding cylinder, and the bottom of the sliding rod is fixedly connected with the top of the hanging basket.
[0027] Preferably, the cooling unit comprises a gas supply pipe which is in communication with the high-temperature area.
[0028] A gas pump is in communication with the input end of the gas supply pipe.
[0029] A second flexible hose is in communication with the output end of the gas supply pipe, and the surface of the second flexible hose is fixedly connected with the second heat insulation sealing plate.
[0030] An annular pipe is arranged on the inner wall of the hanging basket, and the annular pipe is in communication with the second flexible hose through the second heat insulation sealing plate in sequence.
[0031] A first flexible hose is in communication with the annular pipe, and the surface of the first flexible hose is fixedly connected with the heat insulation plate.
[0032] Preferably, the front of the outer box body is provided with two heat insulation glass windows which are located in front of the high-temperature area and the low-temperature area respectively, and the right side of the outer box body is provided with a controller which is electrically connected with the third electric push rod, the first electric telescopic rod, the second electric telescopic rod, the gas pump and the temperature sensor respectively.
[0033] Preferably, an experimental method comprises the following steps:
[0034] Step one, open the door, put the test sample into the basket, close the door. The controller starts the third electric push rod, drives the pressing plate to move down, drives the basket to move down along the channel into the low temperature area, when the basket drops to the set position, the limit block inserts into the positioning groove, realizes accurate positioning, the basket falls on the first heat insulation sealing plate, at the same time, the sealing frame is fitted on the top of the basket, the pressing plate continues to push the spring, the second heat insulation sealing plate is tightly embedded into the channel, and the air tightness of the low temperature area is completed;
[0035] Step two, the controller synchronously starts the first electric telescopic rod and the third electric push rod, the third electric push rod drives the pressing plate and the push rod to continue to move down, and the basket enters the high temperature area, at the same time, the first electric telescopic rod pulls the first heat insulation sealing plate to move down synchronously, to ensure the smoothness of the channel, after the basket is in place, the sealing frame cooperates with the basket to seal the slide, then the controller starts the second electric telescopic rod, pulls the sealing plate to move up, opens the air hole, and prepares for the subsequent temperature cycle;
[0036] Step three, the controller starts the refrigeration unit and the heating unit to maintain the set temperature of the low temperature area and the high temperature area respectively. After the test sample stays in the high temperature area for minutes, the controller executes reverse operation: the second electric telescopic rod drives the sealing plate to move down, closes the air hole; then the first electric telescopic rod and the third electric push rod act cooperatively to lift and transfer the basket to the low temperature area, during the lifting process of the basket, the basket cooperates with the limit block and the sealing plate to seal the slide, effectively blocks the heat convection between the high and low temperature areas, after the basket enters the low temperature area, the first heat insulation sealing plate restores to seal, the top of the basket is fitted with the second heat insulation sealing plate, and the closed environment is formed again, then the second electric telescopic rod opens the air hole, and the test sample maintains in the low temperature environment for minutes, the above process is executed cyclically to realize multiple temperature impact tests;
[0037] Step four, after the predetermined cycle is completed, the controller controls the sealing plate to move down, closes the air hole, so that the inner cavity of the basket is in a sealed state, the third electric push rod drives the pressing plate to move up, the basket is lifted from the first heat insulation sealing plate through the push rod, during the lifting process of the basket, the outer wall of the basket is tightly fitted with the inner wall of the channel, which effectively reduces the cold energy leakage of the low temperature area; when the basket completely leaves the low temperature area, the sealing block at the bottom of the basket slides into the channel to form temporary sealing, which further prevents the loss of cold air;
[0038] Step five, the controller starts the second electric telescopic rod to drive the sealing plate to move up, opens the air hole, and starts the air pump at the same time, the hot air in the high temperature area is sucked into through the gas supply pipe, is transported to the annular pipe through the second telescopic hose, and is uniformly sprayed to the surface of the test sample through the first telescopic hose, to realize rapid cooling. The temperature sensor monitors the temperature of the test sample in real time, and feeds back the data to the controller. When the temperature drops to the preset threshold value, the controller automatically stops the air pump, and prompts the operator to take out the test sample;
[0039] Step six, after the test piece is taken out after the test is completed, the next batch of samples is loaded into the basket, and the above process is repeated to carry out a new round of test.
[0040] Technical effects and advantages of the present application:
[0041] The high-low temperature impact test chamber and the experimental method, by using the basket and the second heat insulation sealing plate in cooperation, when the basket slides out of the outer box body, the sealing block seals the passage, prevents the temperature loss in the low temperature area, so as to facilitate the rapid test of the subsequent test piece, reduces the energy loss, and during the up and down sliding process of the basket on the sliding way of the heat insulation plate, the basket, the limiting block and the sealing plate jointly seal the sliding way, effectively block the heat convection between the high and low temperature areas, and reduce the energy loss of the equipment.
[0042] The high-low temperature impact test chamber and the experimental method, by starting the air pump, the hot gas in the high temperature area is sucked into the air supply pipe, transported to the annular pipe through the second flexible hose, and uniformly sprayed to the surface of the test piece through the first flexible hose, so as to realize rapid cooling, so as to facilitate the workers to take out the test piece quickly without waiting for the test piece to cool naturally. BRIEF DESCRIPTION OF DRAWINGS
[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0044] Figure 1 It is a schematic diagram of the overall structure of the present application;
[0045] Figure 2 It is a schematic diagram of the cross-sectional structure of the present application;
[0046] Figure 3 It is a schematic diagram of the local enlarged structure of the present application;
[0047] Figure 4 It is a schematic diagram of the back structure of the present application;
[0048] Figure 5 It is a schematic diagram of the basket structure of the present application;
[0049] Figure 6 It is a schematic diagram of the cross-sectional structure of the basket of the present application;
[0050] Figure 7 It is a schematic diagram of the cross-sectional structure of the basket of the present application;
[0051] Figure 8 It is a schematic diagram of the structure of the basket running to the high temperature area of the present application.
[0052] Fig. 1, outer box body; 2, heat insulation plate; 3, high temperature area; 4, low temperature area; 5, first heat insulation sealing plate; 51, first electric telescopic rod; 6, limiting block; 7, sealing frame; 8, hanging basket; 81, door plate; 9, air hole; 10, sealing plate; 11, temperature insulation plate; 111, temperature sensor; 12, second electric telescopic rod; 13, first telescopic hose; 14, annular pipe; 15, second telescopic hose; 16, air pump; 17, air supply pipe; 18, second heat insulation sealing plate; 19, sliding cylinder; 20, spring; 21, sliding rod; 22, pressing plate; 23, third electric push rod; 24, push rod; 25, heat insulation glass window. DETAILED DESCRIPTION
[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.
[0054] The present embodiment discloses a high-low temperature impact test box and experimental method, according to the attached Figure 1 to the attached Figure 8 As shown in the drawings, it comprises an outer box body 1, a heat insulation plate 2 is fixedly connected to the inner wall of the outer box body 1, and the heat insulation plate 2 divides the inner cavity of the outer box body 1 into a high temperature area 3 and a low temperature area 4;
[0055] A driving unit is arranged on the outer box body 1, and the driving unit is composed of a first electric telescopic rod 51, a third electric push rod 23, a pressing plate 22 and a push rod 24. The first electric telescopic rod 51 is fixedly installed at the bottom of the high-temperature area 3. The third electric push rod 23 is fixedly installed on the outer wall of the outer box body 1. The pressing plate 22 is fixedly installed on the telescopic end of the third electric push rod 23. The push rod 24 is fixedly installed at the center bottom of the pressing plate 22. The bottom of the push rod 24 is connected with a hanging basket unit. The hanging basket unit is composed of a sealing element, a hanging basket 8, a sealing plate 10 and a second electric telescopic rod 12. The sealing element is composed of a first heat insulation sealing plate 5, four limiting blocks 6 and a sealing frame 7. The bottom of the first heat insulation sealing plate 5 is fixedly connected with the telescopic end of the first electric telescopic rod 51. The cross section of the first heat insulation sealing plate 5 is in the shape of a "convex" character. The convex blocks of the first heat insulation sealing plate 5 slide up and down in the slide way arranged in the heat insulation plate 2, so that the first heat insulation sealing plate 5 seals the slide way. The slide way provides a path for the hanging basket 8 to slide into the high-temperature area 3. The four limiting blocks 6 are fixedly installed at the four corners of the convex blocks of the first heat insulation sealing plate 5, respectively, so as to provide a good positioning effect for the hanging basket 8 falling on the first heat insulation sealing plate 5. The sealing frame 7 is fixedly installed outside the limiting blocks 6. When the limiting blocks 6 are inserted into the limiting grooves arranged at the four corners of the hanging basket 8, the limiting blocks 6 and the hanging basket 8 form a complete hanging basket, so that the gap between the hanging basket 8 and the slide way can be sealed during the up-and-down movement of the hanging basket 8 on the slide way, the convection of the internal temperature of the high-temperature area 3 and the low-temperature area 4 is reduced, and the energy loss is reduced. At the same time, the sealing frame 7 is sleeved on the surface of the top of the hanging basket 8. When the hanging basket 8 slides into the high-temperature area 3, the sealing frame 7 cooperates with the upper half of the hanging basket 8 to seal the slide way, so as to prevent the convection of the internal temperature of the high-temperature area 3 and the low-temperature area 4 and reduce the energy loss.
[0056] Then a plurality of air holes 9 are arranged on the left, right and rear surfaces of the hanging basket 8. The air holes 9 provide a space for hot air or cold air to pass through. The inner wall of the hanging basket 8 is provided with a sealing plate 10 which can slide up and down. The sealing strip on the sealing plate 10 is located above each air hole 9. Then a temperature insulation plate 11 is fixedly installed on the top of the sealing plate 10 and is slidably connected with the inner wall of the hanging basket 8, so that the temperature insulation plate 11 and the upper part of the inner wall of the hanging basket 8 form a temperature insulation cavity. The temperature insulation cavity is used for placing the second electric telescopic rod 12, so as to prevent the temperature change from damaging the device of the second electric telescopic rod 12. The telescopic end of the second electric telescopic rod 12 is fixedly connected with the top of the temperature insulation plate 11, so that the second electric telescopic rod 12 drives the temperature insulation plate 11 to drive the sealing plate 10 to move up and down. A real-time temperature monitoring device is fixedly installed at the center bottom of the temperature insulation plate 11. The temperature insulation plate 11 and the hanging basket 8 are made of heat insulation materials.
[0057] A sealing block is fixedly installed at the bottom of the hanging basket 8. The sealing block is used to seal the channel through which the hanging basket 8 slides out or into the inner part of the outer box body 1. A door panel 81 is embedded in the front of the hanging basket 8. A sealing unit is arranged at the top of the hanging basket 8. The sealing unit is used to seal the channel. The sealing unit consists of a second heat-insulating sealing plate 18, a sliding cylinder 19, a spring 20, and a sliding rod 21. The second heat-insulating sealing plate 18 is arranged at the top of the hanging basket 8, and the cross-section of the second heat-insulating sealing plate 18 is in a "convex" shape. The protruding block of the second heat-insulating sealing plate 18 is embedded in the channel, so that the second heat-insulating sealing plate 18 is used to seal the channel. And one end of the push rod 24 passing through the center of the second heat-insulating sealing plate 18 is fixedly connected to the top of the hanging basket 8. The sliding cylinder 19 is fixedly installed inside the second heat-insulating sealing plate 18 and arranged in a "square" shape. And the pressing plate 22 is slidably connected to the surface of the sliding cylinder 19. A spring 20 is sleeved outside the sliding cylinder 19. The spring 20 is fixedly installed between the pressing plate 22 and the second heat-insulating sealing plate 18. A sliding rod 21 is slidably connected inside the sliding cylinder 19, and one end of the sliding rod 21 is fixedly installed at the top of the hanging basket 8;
[0058] A temperature-lowering unit is arranged on the heat-insulating cavity inside the hanging basket 8. The temperature-lowering unit is used to lower the temperature of the test piece. The temperature-lowering unit consists of an air supply pipe 17, an air pump 16, a second telescopic hose 15, an annular pipe 14, and a first telescopic hose 13. One end of the air supply pipe 17 is connected to the high-temperature area 3, and the other end of the air supply pipe 17 is connected to the input end of the air pump 16. The air pump 16 is installed outside the outer box body 1. The output end of the air pump 16 is connected to the second telescopic hose 15. And electric control valves are fixedly installed inside both the second telescopic hose 15 and the air supply pipe 17 to prevent the temperature from flushing through the pipeline, resulting in energy loss. The other end of the second telescopic hose 15 sequentially passes through the second heat-insulating sealing plate 18, the hanging basket 8 and is connected to the annular pipe 14. The bottom of the annular pipe 14 is connected to the first telescopic hose 13. The other end surface of the first telescopic hose 13 is fixedly installed on the heat-insulating plate 11, and the air jet port of the first telescopic hose 13 is facing the test piece installation area;
[0059] Two heat-insulating glass windows 25 are arranged on the front of the outer box body 1. The two heat-insulating glass windows 25 are respectively located directly in front of the high-temperature area 3 and the low-temperature area 4, so as to facilitate observing the internal conditions of the high-temperature area 3 and the low-temperature area 4. A controller is fixedly installed on the left side of the outer box body 1. The controller is electrically connected to the third electric push rod 23, the first electric telescopic rod 51, the second electric telescopic rod 12, the air pump 16, and the temperature sensor 111 respectively, so that the controller controls the start and stop of the third electric push rod 23, the first electric telescopic rod 51, the second electric telescopic rod 12, and the air pump 16 respectively.
[0060] Example 1. In this example, taking the process of high and low temperature shock of the test piece as an example, in combination with the attached Figure 1Detailed description of the workflow: the workflow is as follows: pull the door plate 81, open the placing opening of the hanging basket 8, place the test piece in the hanging basket 8, close the door plate 81, the controller starts the third electric push rod 23 to pull the pressing plate 22 to move downward, the pressing plate 22 moves downward to drive the push rod 24 to move downward to drive the hanging basket 8 to pass through the channel and enter the inside of the low-temperature area 4, the hanging basket 8 moves downward to make the limiting block 6 inserted into the positioning groove of the hanging basket 8, the hanging basket 8 is positioned, the hanging basket 8 falls on the top of the first heat insulation sealing plate 5, and the sealing frame 7 is sleeved on the top of the hanging basket 8, the pressing plate 22 moves downward to also push the spring 20 downward to drive the second heat insulation sealing plate 18 to be embedded on the channel, and the sealing of the low-temperature area 4 is completed;
[0061] The controller controls the first electric telescopic rod 51 and the third electric push rod 23 to be started at the same time, the third electric push rod 23 pushes the pressing plate 22 to drive the push rod 24 to move downward, the push rod 24 pushes the hanging basket 8 to move downward, and the first electric telescopic rod 51 pulls the first heat insulation sealing plate 5 to move downward at the same time, so that the hanging basket 8 moves to the inside of the high-temperature area 3, the sealing frame 7 cooperates with the hanging basket 8 to seal the slide, and then the controller starts the second electric telescopic rod 12 to pull the sealing plate 10 to move upward to open the sealing of the air hole 9;
[0062] The controller controls the refrigeration unit and the heating unit to be started, the temperature inside the low-temperature area 4 and the high-temperature area 3 is kept, the test piece stays in the high-temperature area 3 for 30 minutes, the controller starts the second electric telescopic rod 12 to pull the sealing plate 10 to move downward to seal the air hole 9, the controller controls the first electric telescopic rod 51 and the third electric push rod 23 to be started at the same time, the third electric push rod 23 pushes the pressing plate 22 to drive the push rod 24 to move upward, the push rod 24 pushes the hanging basket 8 to move upward, and the first electric telescopic rod 51 pushes the first heat insulation sealing plate 5 to move upward at the same time, so that the hanging basket 8 moves to the inside of the low-temperature area 4, the hanging basket 8 cooperates with the limiting block 6 and the sealing plate 10 to seal the slide on the heat insulation plate 2, to prevent the temperature convection between the high-temperature area 3 and the low-temperature area 4, the hanging basket 8 moves to the inside of the low-temperature area 4, the first heat insulation sealing plate 5 seals the slide, the top of the hanging basket 8 and the bottom of the second heat insulation sealing plate 18 are connected, then the controller controls the second electric telescopic rod 12 to pull the sealing plate 10 to move upward to open the sealing of the air hole 9, so that the test piece stays in the low-temperature area for 30 minutes, and the high-low temperature impact cycle is carried out in this way;
[0063] The controller pulls the sealing plate 10 downward to seal the air hole 9, so that the inner cavity of the hanging basket 8 is in a sealed state, the controller controls the third electric push rod 23 to drive the pressing plate 22 to move upward, the pressing plate 22 moves upward to pull the hanging basket 8 through the push rod 24 to separate from the top of the first heat insulation sealing plate 5, and also drives the second heat insulation sealing plate 18 to separate from the channel through which the hanging basket 8 passes, so that the surface of the hanging basket 8 is in contact with the inner wall of the channel during the process of passing through the channel, thereby reducing the loss of the temperature in the low-temperature zone 4 when the hanging basket 8 passes through the channel. When the hanging basket 8 separates from the inner cavity of the low-temperature zone 4, the sealing block at the bottom of the hanging basket 8 slides into the channel to seal the channel, thereby preventing the temperature in the low-temperature zone 4 from being lost, so that the temperature convection between the low-temperature zone 4 and the high-temperature zone 3 is effectively prevented, and the heat loss is reduced.
[0064] In the embodiment 2, the rapid cooling of the test piece is taken as an example, and the drawings are combined Figure 1 The working process is as follows: the controller controls the second electric telescopic rod 12 to pull the sealing plate 10 upward to open the sealing of the air hole 9, the controller starts the air pump 16 to suck the hot air in the high-temperature zone 3 through the air supply pipe 17, the hot air is then delivered into the annular pipe 14 through the second telescopic hose 15, and then the heat is sprayed to the test piece from the annular pipe 14 through the first telescopic hose 13 to rapidly cool the test piece. The temperature value of the test piece is detected by the temperature sensor 111 and is transmitted to the controller in real time. When the detected temperature value reaches the threshold value, the controller stops the movement of the air pump 16, and the test piece can be taken out by the worker.
[0065] After the test piece that has completed the test is taken out, the next batch of test samples is loaded into the hanging basket 8, and the above process is repeated for a new round of test. The design supports continuous operation, significantly improves the test efficiency, and effectively reduces the energy loss through the multi-stage sealing structure and heat recycling, so that the temperature impact test is high in efficiency and energy saving.
[0066] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application should be included in the protection scope of the present application.
Claims
1. A high-low temperature impact test chamber, comprising an outer chamber body (1), a heat insulation plate (2) arranged on the inner wall of the outer chamber body (1), and the heat insulation plate (2) divides the inner cavity of the outer chamber body (1) into a high temperature zone (3) and a low temperature zone (4), characterized in that: The outer box body (1) is provided with a driving unit, the driving unit is drivingly connected with a hanging basket unit, and the driving unit drives the hanging basket unit to slide up and down; The hanging basket unit comprises a sealing member arranged below the heat insulation plate (2); A hanging basket (8) is arranged on the sealing member and used for placing test pieces, and an inner wall of the hanging basket (8) is provided with a ventilation hole (9); A sealing plate (10) is arranged on the inner wall of the hanging basket (8) and slides up and down, and is used for sealing the ventilation hole (9); A second electric telescopic rod (12) is drivingly connected with the sealing plate (10) and is used for driving the sealing plate (10) to move up and down; The hanging basket unit is connected with a cooling unit arranged on the outer box body (1) and is used for rapidly cooling the test.
2. The high-low temperature shock test chamber of claim 1, wherein, The sealing member comprises a first heat insulation sealing plate (5) which is slidingly connected with the heat insulation plate (2); Four limiting blocks (6) are arranged at four corners of the first heat insulation sealing plate (5) respectively and are used for positioning the hanging basket (8), and four corners of the hanging basket (8) are provided with positioning grooves matched with the limiting blocks (6) in size, the positioning grooves provide spaces for the limiting blocks (6) to be inserted, and the limiting blocks (6) and the hanging basket (8) form a complete hanging basket, so that the hanging basket can seal the hanging basket (8) passing through the sliding way of the heat insulation plate (2) during the up and down movement of the hanging basket; A sealing frame (7) is fixedly connected with the outer side of the limiting block (6), the sealing frame (7) is sleeved around the top of the hanging basket (8); and the first heat insulation sealing plate (5) and the sealing frame (7) are used for sealing the sliding way.
3. The high-low temperature shock test chamber of claim 2, wherein, A temperature insulation plate (11) is fixedly connected with the top of the sealing plate (10), the top of the temperature insulation plate (11) is fixedly connected with the telescopic end of the second electric telescopic rod (12), so that the temperature insulation plate (11) and the upper part of the inner wall of the hanging basket (8) form a temperature insulation cavity, the temperature insulation cavity is used for placing the second electric telescopic rod (12), and a temperature sensor (111) is fixedly connected with the center of the temperature insulation plate (11).
4. The high-low temperature shock test chamber of claim 3, wherein, The driving unit comprises a first electric telescopic rod (51) arranged at the bottom of the outer box body (1), and the telescopic end of the first electric telescopic rod (51) is fixedly connected with the bottom of the first heat insulation sealing plate (5); A third electric push rod (23) is fixedly connected with the outer wall of the outer box body (1); A pressing plate (22) is fixedly connected with the telescopic end of the third electric push rod (23); A push rod (24) is fixedly connected with the center of the pressing plate (22) and is fixedly connected with the top of the hanging basket (8).
5. The high-low temperature shock test chamber of claim 4, wherein, The top of the hanging basket (8) is provided with a sealing unit, the sealing unit is used for sealing a passage through which the hanging basket (8) slides out of the inside of the outer box body (1), the bottom of the hanging basket (8) is provided with a sealing block, the sealing block is used for sealing the passage, and the front of the hanging basket (8) is provided with a door plate (81); The sealing unit comprises a second heat insulation sealing plate (18) which is inserted into the outer box body (1), and the second heat insulation sealing plate (18) is used for sealing the passage, the second heat insulation sealing plate (18) is slidingly connected with the push rod (24). A sliding cylinder (19) is fixedly connected to the inner wall of the second heat-insulating sealing plate (18), and the pressing plate (22) is in sliding connection with the surface of the sliding cylinder (19); A spring (20) is sleeved on the outside of the sliding cylinder (19) and arranged between the pressing plate (22) and the second heat-insulating sealing plate (18); A sliding rod (21) is in sliding connection with the inside of the sliding cylinder (19), and the bottom of the sliding rod (21) is fixedly connected to the top of the hanging basket (8).
6. The high-low temperature shock test chamber of claim 5, wherein, The cooling unit comprises a gas supply pipe (17) in communication with the high-temperature zone (3); A gas pump (16) is in communication with the input end of the gas supply pipe (17); A second flexible hose (15) is in communication with the output end of the gas supply pipe (17), and the surface of the second flexible hose (15) is fixedly connected to the second heat-insulating sealing plate (18); An annular pipe (14) is arranged on the inner wall of the hanging basket (8), and the annular pipe (14) and the second flexible hose (15) sequentially pass through the second heat-insulating sealing plate (18) and are in communication with one end of the hanging basket (8); A first flexible hose (13) is in communication with the annular pipe (14), and the surface of the first flexible hose (13) is fixedly connected to the heat-insulating plate (11).
7. The high-low temperature shock test chamber of claim 6, wherein, The front surface of the outer box body (1) is provided with two heat-insulating glass windows (25), and the two heat-insulating glass windows (25) are located in front of the high-temperature zone (3) and the low-temperature zone (4), respectively. The right side of the outer box body (1) is provided with a controller, and the controller is electrically connected with the third electric push rod (23), the first electric telescopic rod (51), the second electric telescopic rod (12), the gas pump (16) and the temperature sensor (111), respectively.
8. A test method using the high-low temperature shock test chamber according to any one of claims 1 to 7, characterized by, The method comprises the following steps: Step one, open the door plate (81), put the test sample into the hanging basket (8), close the door plate, start the third electric push rod (23) of the controller, drive the pressing plate (22) to move downward, drive the hanging basket (8) to move downward along the channel into the low-temperature zone (4) through the push rod (24), when the hanging basket (8) falls to the set position, the limiting block (6) is inserted into the positioning groove, precise positioning is realized, the hanging basket (8) falls on the first heat-insulating sealing plate (5), at the same time, the sealing frame (7) is sleeved on the top of the hanging basket (8), the pressing plate (22) continues to press the spring (20), the second heat-insulating sealing plate (18) is tightly embedded into the channel, and the air-tight sealing of the low-temperature zone is completed; Step two, start the first electric telescopic rod (51) and the third electric push rod (23) of the controller synchronously, the third electric push rod drives the pressing plate (22) and the push rod (24) to drive the hanging basket (8) to continue to move downward, enter the high-temperature zone (3), at the same time, the first electric telescopic rod (51) drives the first heat-insulating sealing plate (5) to move downward synchronously, ensure the smoothness of the channel, after the hanging basket (8) is in place, the sealing frame (7) cooperates with the hanging basket (8) to seal the slide, then the second electric telescopic rod (12) of the controller is started, the sealing plate (10) is pulled to move upward, the air hole (9) is opened, and preparation is made for subsequent temperature cycle; Step three, the controller starts the refrigeration unit and the heating unit, respectively maintains the set temperature of the low temperature zone (4) and the high temperature zone (3), after the test piece stays in the high temperature zone for 30 minutes, the controller performs reverse operation: the second electric telescopic rod (12) drives the sealing plate (10) to move down, closes the air hole (9); then the first electric telescopic rod (51) and the third electric push rod (23) act in concert, lift and transfer the hanging basket (8) to the low temperature zone (4), during the lifting process of the hanging basket (8), the hanging basket (8) is sealed with the limiting block (6) and the sealing plate (10) together, effectively blocks the heat convection between the high and low temperature zones, after the hanging basket (8) enters the low temperature zone (4), the first heat insulation sealing plate (5) restores the sealing, the top of the hanging basket (8) is attached to the second heat insulation sealing plate (18), and a closed environment is formed again, then the second electric telescopic rod (12) opens the air hole (9), the test piece is kept in the low temperature environment for 30 minutes, the above process is executed in a cycle to realize multiple temperature impact tests; Step four, after completing the predetermined cycle, the controller controls the sealing plate (10) to move down, closes the air hole (9), so that the inner cavity of the hanging basket (8) is in a sealed state, the third electric push rod (23) drives the pressing plate (22) to move up, lifts the hanging basket (8) from the first heat insulation sealing plate (5) through the push rod (24), during the lifting process of the hanging basket (8) through the passage, the outer wall thereof is tightly attached to the inner wall of the passage, effectively reducing the cold energy leakage of the low temperature zone (4); when the hanging basket (8) completely separates from the low temperature zone, the sealing block at the bottom thereof slides into the passage, forming a temporary sealing, further preventing the loss of cold air; Step five, the controller starts the second electric telescopic rod (12) to drive the sealing plate (10) to move up, opens the air hole (9), at the same time, starts the air pump (16) to suck the hot air in the high temperature zone (3) into the supply pipe (17), through the second telescopic hose (15), to the annular pipe (14), and then uniformly sprays to the surface of the test piece through the first telescopic hose (13), realizes rapid cooling, the temperature sensor (111) monitors the temperature of the test piece in real time, and feeds back the data to the controller, when the temperature drops to the preset threshold value, the controller automatically stops the air pump (16) from running, and prompts the operator to take out the test sample; Step six, after taking out the test piece which has completed the test, the next batch of test samples are loaded into the hanging basket (8), and the above process is repeated for a new round of test.