Local high-pressure low-temperature gas cooling system for high-temperature test chamber

Abstract

The utility model relates to a kind of high-temperature test box local high-pressure low-temperature gas cooling system, including low-temperature test box and high-temperature test box, high-temperature test box is used to heat outer sleeve, high-temperature test box is built-in heat preservation box, heat preservation box is used to place inner sleeve, air inlet and exhaust port are equipped on heat preservation box, the air inlet of heat preservation box connects the one end of high-pressure gas conveying pipe, high-pressure gas conveying pipe is used to transport cooled gas, the other end of high-pressure gas conveying pipe connects cold exchange coil pipe, cold exchange coil pipe is fixed in low-temperature test box, the air inlet of cold exchange coil pipe is equipped with high-pressure nitrogen gas inlet, high-pressure nitrogen gas inlet is used to connect high-pressure nitrogen gas source, cold exchange coil pipe passes through high-pressure gas conveying pipe and is inhaled into low-temperature high-pressure inert nitrogen gas in heat preservation box;The utility model effectively solves the assembly problem of precision device, control precision is high, practicality is strong, improves production efficiency, avoids the problem of the precision and quality of traditional assembly operation to influence precision instrument.

Description

Technical Field

[0001] This utility model relates to the field of environmental testing technology, specifically a local high-pressure low-temperature gas cooling system for a high-temperature test chamber. Background Technology

[0002] With the advancement of technology, some precision instruments and high-precision valves require heat treatment to expand the outer assembly components and low-temperature cooling to shrink the inner assembly components during the production and inspection process, in order to test the stability and robustness of the assembly.

[0003] The current operating method is as follows: the outer casing is placed in a high-temperature test chamber for baking, and the inner casing is placed in a low-temperature test chamber for cooling. After the baking and cooling times are reached, the outer casing and inner casing are taken out and assembled, and then tested to see if they are stable, firm, and meet the production process requirements.

[0004] However, during the process of removing components, the workpiece will naturally be exposed to the air. At this time, high-temperature components will shrink due to cold and low-temperature components will expand due to heat. Such operations will naturally affect the precision and quality of the product, especially for precision instruments, and may lead to product assembly failure. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned shortcomings by providing a local high-pressure low-temperature gas cooling system for a high-temperature test chamber. This system effectively solves the assembly problem of precision components, offers high control precision, is highly practical, improves production efficiency, and avoids the problems that traditional assembly operations cause to affect the accuracy and quality of precision instruments.

[0006] To achieve the above objectives, a local high-pressure low-temperature gas cooling system for a high-temperature test chamber is designed, comprising a low-temperature test chamber 1 and a high-temperature test chamber 8. The high-temperature test chamber 8 is used to heat the outer components. The high-temperature test chamber 8 has an internal insulation box 6 for placing the inner components. The insulation box 6 is provided with an air inlet and an exhaust outlet. The air inlet of the insulation box 6 is connected to one end of a high-pressure gas delivery pipe 5, which is used to deliver cooled gas. The other end of the high-pressure gas delivery pipe 5 is connected to a cold energy exchange coil 2, which is fixed inside the low-temperature test chamber 1. The air inlet end of the cold energy exchange coil 2 is provided with a high-pressure nitrogen inlet 3, which is used to connect to a high-pressure nitrogen gas source. The cold energy exchange coil 2 introduces low-temperature, high-pressure inert nitrogen gas into the insulation box 6 through the high-pressure gas delivery pipe 5.

[0007] Furthermore, a proportional electric ball valve 4 is installed on the pipeline between the inlet of the high-pressure gas delivery pipe 5 and the outlet of the cold exchange coil 2. The proportional electric ball valve 4 is used to control the flow rate of the cooled high-pressure nitrogen.

[0008] Furthermore, a high-precision temperature sensor is installed at the outlet of the cold exchange coil 2, which is used to measure the temperature of the cooled nitrogen gas.

[0009] Furthermore, the exhaust port of the heat-insulating box 6 is connected to the exhaust pipe 7, which is used to discharge the cooled nitrogen gas after heat exchange inside the heat-insulating box 6 to the outside of the box. The exhaust pipe 7 is insulated with an insulation layer to reduce the impact on the temperature of the high-temperature box.

[0010] Furthermore, the high-temperature test chamber 8 is equipped with tooling fixtures, and the outer component is fixed inside the high-temperature test chamber 8 by the tooling fixtures. The nozzle of the high-pressure gas delivery pipe 5 is connected to the heat preservation box 6, and the nozzle is aligned with the inner component, which further improves production efficiency.

[0011] Compared with the prior art, this utility model has the following advantages: (1) The local high pressure low temperature gas cooling system of the high temperature test chamber of this utility model effectively solves the assembly problem of precision components, has high control accuracy, strong practicality, improves production efficiency, and avoids the problems of affecting the accuracy and quality of precision instruments in traditional assembly operations. (2) The heat preservation box of this utility model is placed in the high temperature chamber. The cooling nitrogen gas after heat exchange in the heat preservation box is discharged from the chamber through the cold air exhaust pipe. The exhaust pipe is insulated with a heat preservation layer, thereby reducing the impact on the temperature of the high temperature chamber. (3) The low temperature test chamber of this utility model is equipped with a fixed coil, and high pressure nitrogen is introduced into the coil. The coil can increase the heat exchange area of ​​nitrogen, and the nitrogen is cooled in the low temperature chamber, thereby achieving the required low temperature nitrogen. (4) The inner components can be removed after the heat preservation box of this utility model is opened, so that they can be directly assembled in the high temperature chamber, which effectively ensures the assembly accuracy of precision instruments and improves production efficiency. It is worth promoting and applying. Attached Figure Description

[0012] Figure 1 This is a front structural diagram of the present invention; Figure 2 This is a top view of the structure of this utility model; In the diagram: 1. Low temperature test chamber; 2. Cold exchange coil; 3. High-pressure nitrogen inlet; 4. Proportional electric ball valve; 5. High-pressure gas delivery pipe; 6. Insulation box; 7. Exhaust pipe; 8. High temperature test chamber. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings: As attached Figure 1 and attached Figure 2As shown, this utility model provides a local high-pressure low-temperature gas cooling system for a high-temperature test chamber, including a low-temperature test chamber 1 and a high-temperature test chamber 8. The high-temperature test chamber 8 is used to heat the outer components. The high-temperature test chamber 8 has an internal insulation box 6 for placing the inner components. The insulation box 6 is provided with an air inlet and an exhaust outlet. The air inlet of the insulation box 6 is connected to one end of a high-pressure gas delivery pipe 5, which is used to deliver cooled gas. The other end of the high-pressure gas delivery pipe 5 is connected to a cold energy exchange coil 2, which is fixed inside the low-temperature test chamber 1. The air inlet end of the cold energy exchange coil 2 is provided with a high-pressure nitrogen inlet 3, which is used to connect to a high-pressure nitrogen gas source. The cold energy exchange coil 2 introduces low-temperature high-pressure inert nitrogen into the insulation box 6 through the high-pressure gas delivery pipe 5.

[0014] Among them, a proportional electric ball valve 4 is installed on the pipeline between the inlet of the high-pressure gas delivery pipe 5 and the outlet of the cold exchange coil 2. The proportional electric ball valve 4 is used to control the flow rate of the cooled high-pressure nitrogen. A high-precision temperature sensor is installed at the outlet of the cold exchange coil 2. The high-precision temperature sensor is used to measure the temperature of the cooled nitrogen.

[0015] The high-temperature test chamber 8 is equipped with tooling fixtures. The outer component is fixed inside the high-temperature test chamber 8 by the tooling fixtures. The nozzle of the high-pressure gas delivery pipe 5 is connected to the heat insulation box 6 and the nozzle is aligned with the inner component to further improve production efficiency. The exhaust port of the heat insulation box 6 is connected to the exhaust pipe 7. The exhaust pipe 7 is used to exhaust the cooled nitrogen gas after heat exchange inside the heat insulation box 6 to the outside of the chamber. The exhaust pipe 7 is insulated with a heat insulation layer to reduce the impact on the temperature of the high-temperature chamber.

[0016] This invention employs a method of placing an insulated box inside a high-temperature test chamber and introducing low-temperature, high-pressure inert nitrogen gas into the box to cool the inner components of a precision instrument. The cooled gas is then discharged from the high-temperature chamber through insulated pipes to minimize its impact on the chamber's temperature. Simultaneously, the outer casing of the precision instrument is placed inside the high-temperature chamber, secured with fixtures, and subjected to heat treatment. This satisfies the production process requirements of heat treatment for the outer casing and cooling for the inner casing.

[0017] The specific implementation method of this utility model is as follows: The outer casing of the precision instrument is directly placed inside the high-temperature chamber and fixed with tooling fixtures. A nozzle connected to high-pressure nitrogen is then connected to an insulated box, with the nozzle aligned with the inner casing. The inner casing is also placed inside the insulated box, which provides insulation. The cooled nitrogen, after heat exchange within the insulated box, is discharged outside the chamber through a cold air exhaust pipe. The exhaust pipe is insulated to reduce its impact on the temperature of the high-temperature chamber. Simultaneously, a low-temperature test chamber begins cooling. This low-temperature test chamber contains a fixed coil through which high-pressure nitrogen is introduced. The coil increases the nitrogen's heat exchange area, allowing the nitrogen to be cooled within the chamber to achieve the required low-temperature nitrogen. The nitrogen pressure is 0.8-1.0 MPa provided by the user. An electric proportional ball valve is connected to the coil outlet, with the valve opening automatically controlled by a PID controller. A high-precision temperature sensor is installed at the coil outlet to measure the temperature of the cooled nitrogen. When the nitrogen temperature reaches the preset value, the proportional ball valve opens, supplying cooled nitrogen into the high-temperature chamber's insulation box to cool the internal components of the precision instrument. Once both the outer and inner components reach their preset temperatures and remain at that temperature for a set period (the duration can be adjusted according to process requirements), the insulation box automatically opens, allowing the inner components to be removed and directly assembled within the high-temperature chamber. This effectively ensures the assembly accuracy of the precision instrument and improves production efficiency.

[0018] The high-temperature test chamber local high-pressure low-temperature gas cooling system of this utility model mainly consists of the following parts: a low-temperature test chamber, which provides a cold source for cooling high-pressure nitrogen; a cold exchange coil, which is used to introduce cooling high-pressure nitrogen; a high-pressure nitrogen inlet, which is used to connect to the high-pressure nitrogen source; a proportional electric ball valve, which is used to control the flow rate of the cooled high-pressure nitrogen; a high-pressure gas delivery pipe, which is used to deliver the cooled gas; an insulation box, which is used to place the inner components; an exhaust pipe, which is used to discharge the gas after heat exchange; and a high-temperature test chamber, which is used to heat the outer components.

[0019] The contents not described in detail in this specification are existing technologies known to those skilled in the art. The standard parts used can be purchased from the market, and the irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the circuit connection adopts conventional connection methods in the existing technology, which will not be described in detail here.

[0020] This utility model is not limited to the above-described embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this utility model shall be considered equivalent substitutions and shall be included within the protection scope of this utility model.

Claims

1. A high temperature test chamber local high pressure low temperature gas cooling system, characterized in that: The test chamber includes a low-temperature test chamber (1) and a high-temperature test chamber (8). The high-temperature test chamber (8) is used to heat the outer kit. The high-temperature test chamber (8) has a built-in insulation box (6). The insulation box (6) is used to place the inner kit. The insulation box (6) is provided with an air inlet and an exhaust outlet. The air inlet of the insulation box (6) is connected to one end of a high-pressure gas delivery pipe (5). The high-pressure gas delivery pipe (5) is used to deliver cooled gas. The other end of the high-pressure gas delivery pipe (5) is connected to a cold energy exchange coil (2). The cold energy exchange coil (2) is fixed inside the low-temperature test chamber (1). The air inlet end of the cold energy exchange coil (2) is provided with a high-pressure nitrogen inlet (3). The high-pressure nitrogen inlet (3) is used to connect to a high-pressure nitrogen gas source. The cold energy exchange coil (2) introduces low-temperature high-pressure inert nitrogen into the insulation box (6) through the high-pressure gas delivery pipe (5).

2. The high temperature test chamber partial high pressure low temperature gas cooling system of claim 1, wherein: A proportional electric ball valve (4) is installed on the pipeline between the inlet of the high-pressure gas delivery pipe (5) and the outlet of the cold exchange coil (2). The proportional electric ball valve (4) is used to control the flow rate of the cooled high-pressure nitrogen.

3. The high temperature test chamber partial high pressure low temperature gas cooling system of claim 2, wherein: A high-precision temperature sensor is installed at the outlet of the cooling coil (2), which is used to measure the temperature of the cooled nitrogen.

4. The high temperature test chamber localized high pressure low temperature gas cooling system of claim 1 wherein: The exhaust port of the heat preservation box (6) is connected to the exhaust pipe (7). The exhaust pipe (7) is used to discharge the cooled nitrogen gas after heat exchange inside the heat preservation box (6) to the outside of the box. The exhaust pipe (7) is insulated with an insulation layer.

5. The local high-pressure low-temperature gas cooling system for the high-temperature test chamber as described in any one of claims 1 to 4, characterized in that: The high-temperature test chamber (8) is equipped with tooling fixtures. The outer kit is fixed inside the high-temperature test chamber (8) by the tooling fixtures. The nozzle of the high-pressure gas delivery pipe (5) is connected to the heat preservation box (6) and the nozzle is aligned with the inner kit.

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