Temperature shock test box

Abstract

The invention belongs to the technical field of test equipment, and discloses a temperature shock test box. The temperature shock test box comprises a driving mechanism and a detection assembly. The driving mechanism is used for driving the moving trolley to move, the detection assembly comprises a positioning device and a control circuit board, the control circuit board is electrically connected with the positioning device, the positioning device is installed on the box body and used for detecting whether the moving trolley is located in a cold area or a hot area, and the control circuit board is used for controlling the driving mechanism to be opened or closed. When the driving mechanism drives the moving trolley to move to the cold area or the hot area, the positioning device sends out a low level to the control circuit board, the control circuit board can control the driving mechanism to be started, and when the moving trolley reaches the cold area or the hot area, the positioning device sends out a high level to the control circuit board, and the control circuit board can control the driving mechanism to be closed. Therefore, the moving trolley can accurately stop in the cold area or the hot area, and the sealing piece can cut off heat exchange between the cold area and the hot area.

Description

technical field [0001] The invention relates to the technical field of testing equipment, in particular to a temperature shock test chamber. Background technique [0002] The temperature shock test chamber is the necessary testing equipment in the material industry. It takes materials, components and equipment as the test objects, and tests the changes caused by thermal expansion and contraction and the tolerance they can withstand in the shortest possible time. Therefore, it is necessary to quickly switch between the cold area and the hot area, and the trolley in the test chamber needs to move accurately to the hot area or the cold area to ensure a good seal between the cold area and the hot area. [0003] figure 1 Show the structural representation of the temperature shock box in the prior art, refer to figure 1 , the existing temperature shock box includes a cylinder 100, a positioning block 200, a first cable 300, a second cable 400 and rollers. A cylinder 100 is inst...

AI Technical Summary

Problems solved by technology

However, the problem with this solution is that when the mobile trolley moves between the hot zone and the cold zone, since the positioning block is at the front end of the cable, the cable will be stretchable during the pulling process or after long-term use, and the length of the cable will increase. , resulting in inability to locate or accurately locate, causing the trolley to be unable to be accurately pulled to the hot zone or cold zone, so that the seal on the moving trolley cannot effectively play the role of isolation and sealing, which will eventually lead to poor sealing of the test chamber and lead to cold There is always a process of heat exchange between the zone and the hot zone, which affects the test results

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