Low-pressure comprehensive environment test temperature control device

Abstract

The utility model discloses a low-pressure comprehensive environment test temperature control device, which comprises a test box, a temperature control component is arranged on the inner wall of the test box, the temperature control component comprises a heating pipe, a refrigerating pipe and a heat transfer plate, one side of the heat transfer plate is fixed on the inner wall of the test box, the other side of the heat transfer plate is fixed with the heating pipe and the refrigerating pipe, and the heating pipe and the refrigerating pipe are fixed on the inner wall of the test box. High-temperature liquid is introduced into the heating pipe, so that the high-temperature condition required by the test piece is achieved; low-temperature liquid is introduced into the refrigeration pipe, so that the low-temperature condition required by the test piece is achieved; and the temperature sensor is arranged in the test box through a three-dimensional moving assembly and is used for realizing temperature measurement of a plurality of point positions in the test box body. The temperature control device for the low-pressure comprehensive environment test can realize uniform distribution of temperature in the test box under a low-pressure condition, so that a test piece is ensured to be in a correct test environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of low pressure comprehensive environmental test device, can realize four comprehensive environmental test under the joint action of low pressure, temperature, humidity and horizontal vibration, and meet the test requirements of temperature uniformity under low pressure condition. BACKGROUND

[0002] Four comprehensive low pressure horizontal vibration test system has been widely applied, especially suitable for aviation, aerospace and other fields.

[0003] Conventional wall heating device uses armored nickel-chromium wire as heating component, and heats by energization. The surface temperature of nickel-chromium wire is high, and the heat transfer area is small. Long-term exposure in hot and humid environment leads to low heat transfer efficiency and frequent failures. When the test chamber is under low pressure condition, the air in the test chamber is thin, the heat conduction efficiency is reduced, and the temperature uniformity in the test chamber is poor, which is difficult to meet the temperature uniformity requirement and cannot achieve the required test conditions of test piece. Therefore, a temperature control component that can meet the temperature uniformity under low pressure environment is needed. SUMMARY

[0004] In view of the above technical problems, the utility model provides a low pressure comprehensive environmental test temperature control device, which can realize uniform distribution of temperature in the test chamber under low pressure condition, so as to ensure that the test piece is in the correct test environment.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical means:

[0006] A low pressure comprehensive environmental test temperature control device, comprising:

[0007] A test chamber, a temperature control component is provided on the inner wall of the test chamber, the temperature control component comprises a heating pipe, a refrigeration pipe and a heat transfer plate, wherein one side of the heat transfer plate is fixed on the inner wall of the test chamber, and the other side of the heat transfer plate is fixed with the heating pipe and the refrigeration pipe. By introducing high-temperature liquid into the heating pipe, the required high-temperature condition of the test piece is achieved. By introducing low-temperature liquid into the refrigeration pipe, the required low-temperature condition of the test piece is achieved.

[0008] A temperature sensor is installed in the test chamber by a three-dimensional moving assembly to measure the temperature of multiple points in the test chamber.

[0009] A high-temperature liquid inlet connected to the heating pipe and a low-temperature liquid inlet connected to the refrigeration pipe are provided on one side wall of the test chamber. A high-temperature liquid outlet connected to the heating pipe and a low-temperature liquid outlet connected to the refrigeration pipe are provided on the other side wall of the test chamber.

[0010] The wall of the test chamber has a heat insulation layer, and the part of the heating pipe and the part of the refrigeration pipe are arranged in the heat insulation layer and are provided with sealing gaskets at the interfaces between the pipes and the inner wall of the test chamber.

[0011] The heating pipe and the refrigeration pipe arranged on the heat transfer plate are both S-shaped.

[0012] The three-dimensional moving assembly comprises:

[0013] A longitudinal sliding rail is fixed to the upper wall of the test chamber, and the longitudinal sliding block is capable of moving along the longitudinal sliding rail;

[0014] A transverse sliding rail is fixed to the longitudinal sliding block and is capable of moving along with the longitudinal sliding block to realize longitudinal displacement; the transverse sliding block is capable of moving along the transverse sliding rail;

[0015] The transverse sliding block is provided with an extension rod at the lower end of which the temperature sensor is connected.

[0016] The temperature control component is arranged on each of the four side walls of the test chamber. Beneficial effects

[0017] The heating pipe is a thick-walled pressure-resistant sealed pipe, and high-temperature liquid is connected into the heating pipe; heat is transferred to the inner wall through the heat transfer plate, so that the area of heat radiation is expanded. The refrigeration pipe is a thick-walled pressure-resistant sealed pipe, and low-temperature liquid is connected into the refrigeration pipe; the heat in the chamber is absorbed through the heat transfer plate to achieve the refrigeration effect. The temperature of the liquid in the heating pipe or the refrigeration pipe is controlled by the temperature controller, so as to meet the requirement of the entire system on the uniformity of temperature. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structure diagram of a low-pressure comprehensive environmental test temperature control device;

[0019] 1.1 vibration generator, 1.2 test chamber, 1.3 inner wall of the test chamber, 1.4 heat transfer plate, 1.5 temperature control component, 1.6 water platform surface; 1.7 inner wall of the test chamber; 1.8 sealing gasket; 1.9 temperature control component; 1.10 transverse sliding block; 1.11 extension rod; 1.12 longitudinal sliding rail; 1.13 temperature sensor;

[0020] Figure 2 is a front view of the temperature control component of the utility model;

[0021] 2.1 heat transfer plate, 2.2 heating pipe, 2.3 refrigeration pipe;

[0022] Figure 3 is a side view of the temperature control component of the utility model. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be explained in further detail below in combination with the drawings and specific embodiments. Embodiment

[0024] The structure diagram of the low-pressure comprehensive environmental test temperature control device is shown in the figure. Figure 1 The vibration system is mainly composed of a vibration generator 1.1 and a water platform 1.6. The low-pressure, temperature and humidity test conditions of the test piece are regulated inside the test box 1.2. The temperature control component 1.9 is installed on the inner wall 1.7 of the test box to enhance the heat radiation efficiency inside the box to meet the uniformity requirement of the test temperature. The temperature control component comprises a heating pipe 2.2, a refrigeration pipe 2.3 and a heat transfer plate 2.1, wherein one side of the heat transfer plate 2.1 is fixed on the inner wall of the test box, and the other side of the heat transfer plate 2.1 is fixed with the heating pipe 2.2 and the refrigeration pipe 2.3. High-temperature liquid is introduced into the heating pipe 2.2 to achieve the high-temperature condition required by the test piece, and low-temperature liquid is introduced into the refrigeration pipe 2.3 to achieve the low-temperature condition required by the test piece.

[0025] To measure the temperature uniformity inside the test box, the temperature of multiple points inside the test box 1.2 needs to be measured, and the decoupling sliding device is used to adjust the position of the temperature sensor 1.13. The temperature sensor 1.13 is installed inside the test box 1.2 through a three-dimensional moving assembly to realize the temperature measurement of multiple points inside the test box. When the heating / refrigeration time is not less than 30 minutes, the temperature of each measuring point meets , that is, the temperature uniformity inside the test box meets the requirement. Embodiment 1

[0026] In an alternative embodiment, a high-temperature liquid inlet connected to the heating pipe and a low-temperature liquid inlet connected to the refrigeration pipe are arranged on one side wall of the test box, and a high-temperature liquid outlet connected to the heating pipe and a low-temperature liquid outlet connected to the refrigeration pipe are arranged on the other side wall of the test box. Embodiment 2

[0027] In an alternative embodiment, the side wall of the test box has a heat preservation layer, and part of the pipe of the heating pipe and part of the pipe of the refrigeration pipe are arranged in the heat preservation layer, and a sealing gasket is installed at the interface between the pipe and the inner wall of the test box. Embodiment 3

[0028] In an alternative embodiment, the heating pipe and the refrigeration pipe on the heat transfer plate are both S-shaped with repeated bends, which are in full contact with the heat transfer plate 2.1 and have a large heat transfer area. Embodiment 4

[0029] In an alternative embodiment, the three-dimensional moving assembly comprises:

[0030] A longitudinal slide rail 1.12 is fixed on the upper wall of the test box, and the longitudinal slide block can move along the longitudinal slide rail;

[0031] A transverse slide rail is fixed on the longitudinal slide block, and can realize longitudinal displacement with the movement of the longitudinal slide block; the transverse slide block 1.10 can move along the transverse slide rail;

[0032] A telescopic rod 1.11 is arranged below the transverse slide block 1.10, and the bottom end of the telescopic rod 1.11 is connected with the temperature sensor 1.13. Embodiment 5

[0033] In an alternative embodiment, the four side walls of the test box are each arranged with the temperature control component.

[0034] The temperature control component described above does not need to be powered when in operation, avoids the shortcomings of easy failure and electric leakage of the conventional nickel-chromium wire heating mode, and avoids the limitation of the creepage distance on the design, greatly improving the reliability and stability of the design.

Claims

1. A low-pressure comprehensive environmental test temperature control device, comprising: a test box, wherein an inner wall of the test box is provided with a temperature control component, and the temperature control component comprises a heating pipe, a refrigeration pipe and a heat transfer plate, one side of the heat transfer plate is fixed on the inner wall of the test box, and the other side of the heat transfer plate is fixed with the heating pipe and the refrigeration pipe, high-temperature liquid is introduced into the heating pipe (2.2) to achieve the required high-temperature condition of a test piece, and low-temperature liquid is introduced into the refrigeration pipe to achieve the required low-temperature condition of the test piece; a temperature sensor installed in the test box through a three-dimensional moving assembly to realize temperature measurement of multiple points in the test box.

2. The low-pressure comprehensive environmental test temperature control device according to claim 1, wherein one side wall of the test box is provided with a high-temperature liquid inlet connected with the heating pipe and a low-temperature liquid inlet connected with the refrigeration pipe, and the other side wall is provided with a high-temperature liquid outlet connected with the heating pipe and a low-temperature liquid outlet connected with the refrigeration pipe.

3. The low-pressure comprehensive environmental test temperature control device according to claim 1, wherein the side wall of the test box is provided with a heat preservation layer, and part of the pipe of the heating pipe and part of the pipe of the refrigeration pipe are arranged in the heat preservation layer (1.3), and a sealing washer (1.8) is arranged at the interface between the pipe and the inner wall (1.7) of the test box.

4. The low-pressure comprehensive environmental test temperature control apparatus according to claim 1, wherein The heating pipe (2.2) and the refrigeration pipe (2.3) on the heat transfer plate are both S-shaped and repeatedly bent.

5. The low-pressure comprehensive environmental test temperature control apparatus according to claim 1, wherein The three-dimensional moving assembly comprises: a longitudinal sliding rail (1.12) fixed on the upper wall of the test box, wherein a longitudinal sliding block (1.4) is capable of moving along the longitudinal sliding rail (1.12); a transverse sliding rail (1.5) fixed on the longitudinal sliding block (1.4) and capable of moving along the longitudinal sliding block (1.4) to realize longitudinal displacement; and a transverse sliding block (1.10) capable of moving along the transverse sliding rail (1.5); a telescopic rod (1.11) arranged below the transverse sliding block (1.10), and the bottom end of the telescopic rod (1.11) is connected with the temperature sensor.

6. The low-pressure comprehensive environmental test temperature control apparatus according to claim 1, wherein The temperature control component is arranged on each of the four side walls of the test box.

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