Nylon tube cooling liquid permeation amount detection device

Abstract

The utility model discloses a nylon tube cooling liquid permeation capacity detection device, which solves the technical problem of nylon tube cooling liquid permeation capacity test through a high-low temperature environment box for storing test samples, a cooling liquid circulating system, a blowing circulating system and the like, and is divided into a plurality of paths through a distributor. A plurality of samples can be tested at the same time, constant-temperature and constant-pressure circulation of cooling liquid in the test samples is achieved, the technical problem of circular blowing of the activated carbon canister is effectively solved, the overall structural design is ingenious, it can be guaranteed that the test is safely, reliably and effectively completed, the whole test process is easy to operate, safe and reliable, and the test efficiency is high; and data authenticity is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile nylon tube and assembly detection, in particular to a nylon tube coolant penetration detection device. Background Art

[0002] Coolant (50% ethylene glycol + 50% water), the boiling point of ethylene glycol under normal pressure is 197.3℃, and the boiling point of water is 100℃. Since it is difficult for liquid to seep out of polymer materials, it is considered that the seepage is hydrocarbons. The traditional collection method is to use compressed air purge to transfer the seepage hydrocarbons to the desiccant for adsorption, and calculate the permeation rate by weighing the mass change of the desiccant. However, the dryness and purity of the compressed air used in this method are difficult to guarantee, and the hydrocarbons that seep out of the open purge cannot be completely collected, resulting in large test errors. Therefore, the traditional purge method cannot guarantee the test accuracy.

[0003] Therefore, how to design a nylon tube coolant penetration detection device that can solve the above technical problems is a topic that the utility model concentrates on studying. Utility Model Content

[0004] In order to solve at least one of the problems mentioned in the above background technology, the purpose of the utility model is to provide a nylon tube coolant penetration detection device.

[0005] The utility model is realized by the following technical solutions:

[0006] A nylon tube coolant penetration detection device, comprising:

[0007] A thermostat, which is used to keep the temperature of the coolant constant and is provided with a coolant input interface and a coolant output interface;

[0008] A sample holding device, wherein a sealed accommodating cavity is provided in the sample holding device, a first pipe joint and a first air pipe joint connected to the accommodating cavity are provided at one end of the sample holding device, and a second pipe joint and a second air pipe joint connected to the accommodating cavity are provided at the other end, the first pipe joint is connected to the coolant output interface through a first coolant pipe, and the second pipe joint is connected to the coolant input interface through a second coolant pipe, and the nylon tube sample to be tested is installed in the accommodating cavity and one end of the nylon tube sample is sealed and connected to the first pipe joint, and the other end is sealed and connected to the second pipe joint;

[0009] A nitrogen supply device, the nitrogen supply device is connected to the first gas pipe joint through a first gas pipe, the second gas pipe joint is connected to the first gas pipe through a second gas pipe, and the nitrogen supply device is used to provide nitrogen;

[0010] A high and low temperature environment box, wherein the sample holding device is arranged in the high and low temperature environment box, and the high and low temperature environment box is used to ensure the detection temperature of the coolant, the nylon tube sample to be tested and related components;

[0011] Among them, the second gas pipeline is provided with a three-way ball valve, an activated carbon canister and a gas delivery pump in sequence. The gas delivery pump is close to the connection between the first gas pipeline and the second gas pipeline. The activated carbon canister is located between the three-way ball valve and the gas delivery pump for collecting hydrocarbons.

[0012] Optionally, a plurality of the sample clamping devices are included, and each of the sample clamping devices is connected to the constant temperature machine and the nitrogen supply device.

[0013] Optionally, the coolant output interface is connected to the first distribution valve through a third coolant pipe, the coolant input interface is connected to the second distribution valve through a fourth coolant pipe, a gas distributor is provided on the output interface of the nitrogen supply device, and the first distribution valve, the second distribution valve and the gas distributor are each provided with multiple interfaces, the first pipe joint of each sample clamping device is connected to the interface on the first distribution valve through a first coolant pipe, the second pipe joint is connected to the interface on the second distribution valve through a second coolant pipe, the first air pipe joint is connected to the interface of the gas distributor through a first air supply pipe, and the second air pipe joint is connected to the corresponding first air supply pipe through a second air supply pipe.

[0014] Optionally, the thermostat is provided with a coolant storage heater, a circulation pump with flow regulation, and a pressure regulator to ensure that the coolant with constant temperature, pressure and flow flows through the nylon tube sample.

[0015] Optionally, a ball valve is further provided between the nitrogen supply device and the gas distributor.

[0016] Optionally, each of the first air supply pipes is provided with a pressure regulating valve for controlling the blowing pressure, and the second air supply pipes are connected to the first air supply pipes via a three-way joint.

[0017] Optionally, the sample clamping device includes a sealing cylinder and a first sealing cover and a second sealing cover respectively sealed and installed at both ends of the sealing cylinder, the accommodating cavity is formed between the sealing cylinder and the first sealing cover and the second sealing cover, the first pipe joint and the first air pipe joint are arranged on the first sealing cover, and the second pipe joint and the second air pipe joint are arranged on the second sealing cover.

[0018] Optionally, a first O-ring is provided between the first sealing cover, the second sealing cover and the sealing cylinder, a second O-ring is provided between the first pipe joint and the first sealing cover and between the second pipe joint and the second sealing cover, the first air pipe joint is welded to the first sealing cover, and the second air pipe joint is welded to the second sealing cover.

[0019] Optionally, the sealing cylinder is made of transparent organic glass, the first sealing cover and the second sealing cover are made of aluminum alloy, and the sealing cylinder, the first sealing cover and the second sealing cover are all made by precision machining.

[0020] The beneficial effects of the utility model are as follows: the nylon tube coolant permeation detection device of the utility model solves the technical problem of nylon tube coolant permeation testing by means of a high and low temperature environment box for storing test samples, a coolant circulation system and an air blowing circulation system, etc., and is divided into multiple paths by a distributor, so that multiple samples can be tested at the same time, and the coolant is circulated at a constant temperature and pressure inside the test sample, which effectively solves the technical problem of circulating air blowing on the activated carbon tank, making the entire test process simple to operate, safe and reliable, and highly efficient, thereby ensuring the authenticity of the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of a detection device according to an embodiment of the utility model;

[0023] Figure 2 It is a side view (right) and a front view (left) of a structural schematic diagram of a sealing cylinder of a detection device according to an embodiment of the utility model;

[0024] Among them, 1. constant temperature machine, 2. first distribution valve, 3. first coolant pipe, 4. sample clamping device, 5. nylon tube sample, 6. second coolant pipe, 7. second distribution valve, 8. high and low temperature environment box, 9. nitrogen supply device, 10. ball valve, 11. gas distributor, 12. first gas pipeline, 13. pressure regulating valve, 14. second gas pipeline, 15. three-way ball valve, 16. activated carbon tank, 17. gas delivery pump, 18. three-way joint, 19. third coolant pipe, 20. fourth coolant pipe, 401. first sealing cover, 402. sealing cylinder, 403. first pipe joint, 404. first air pipe joint, 405. second air pipe joint, 406. second pipe joint, 407. second O-ring, 408. second sealing cover, 409. first O-ring. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model.

[0026] In the description of the embodiments of the present invention, it needs to be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0027] Below, refer to Figure 1-2 The nylon tube coolant permeation detection device involved in the embodiment of the utility model is described in detail.

[0028] like Figure 1As shown, according to the embodiment of the utility model, the nylon tube coolant permeation detection device provided includes a thermostat 1, a sample clamping device 4, a nitrogen supply device 9 and a high and low temperature environment box 8, the thermostat 1 is used to keep the temperature of the coolant constant, and the thermostat 1 is provided with a coolant input interface and a coolant output interface; the sample clamping device 4 is provided with a sealed accommodating cavity, one end of the sample clamping device 4 is provided with a first pipe joint 403 and a first air pipe joint 404 connected to the accommodating cavity, and the other end is provided with a second pipe joint 406 and a second air pipe joint 405 connected to the accommodating cavity, the first pipe joint 403 is connected to the coolant output interface through the first coolant pipe 3, and the second pipe joint 406 is connected to the coolant input interface through the second coolant pipe 6, and the nylon tube sample 5 to be detected is installed in the accommodating cavity and one of them One end is sealed and connected to the first pipe joint 403, and the other end is sealed and connected to the second pipe joint 406; the nitrogen supply device 9 is connected to the first air pipe joint 404 through the first air pipe 12, and the second air pipe joint 405 is connected to the first air pipe 12 through the second air pipe 14, and the nitrogen supply device 9 is used to provide nitrogen; the sample clamping device 4 is arranged in the high and low temperature environment box 8, and the high and low temperature environment box 8 is used to ensure the detection temperature of the coolant, the nylon tube sample 5 to be tested and related devices; wherein, the second air pipe 14 is provided with a three-way ball valve 15, an activated carbon tank 16 and a gas delivery pump 17 in sequence, and the gas delivery pump 17 is close to the connection between the first air pipe 12 and the second air pipe 14, and the activated carbon tank 16 is located between the three-way ball valve 15 and the gas delivery pump 17 for collecting hydrocarbons.

[0029] In this embodiment, the constant temperature machine 1, the first coolant pipe 3, the nylon tube sample 5 in the sample clamping device 4, and the second coolant pipe 6 form a coolant circulation loop. The constant temperature machine 1 is used to ensure the constant temperature, pressure and flow of the coolant in the coolant circulation loop to ensure that the temperature, pressure and flow of the coolant flowing through the test sample (nylon tube sample 5) are constant.

[0030] In this embodiment, the nitrogen supply device 9, the first gas pipe 12, the accommodating cavity, the second gas pipe 14, the three-way ball valve 15 arranged on the second gas pipe 14, the activated carbon canister 16 and the gas delivery pump 17 form a nitrogen purge circulation loop. During the nitrogen circulation process, the activated carbon canister 16 collects hydrocarbons in the gas.

[0031] In this embodiment, the nitrogen supply device 9 can be a nitrogen cylinder, which stores nitrogen of a certain pressure required for the test and provides a clean and dry gas source for the test. A switch, a pressure regulating valve and a pressure gauge can be set on the nitrogen cylinder to facilitate the control and status observation of the nitrogen cylinder.

[0032] In this embodiment, one or more sample clamping devices 4 can be provided, and the sample clamping devices 4 are arranged in a high and low temperature environment. The high and low temperature environment box 8 is used to ensure the detection temperature of the coolant, the nylon tube sample 5 to be tested and related devices.

[0033] Therefore, the hydrocarbons in the blowing circulation loop are collected by the activated carbon canister 16 to detect the coolant permeation amount of the nylon tube. The technical difficulties of the coolant permeation amount test of the nylon tube are solved by the high and low temperature environment box 8 for storing the test samples, the coolant circulation system and the blowing circulation system, and the coolant circulation inside the test sample is realized at a constant temperature and pressure, which effectively solves the technical difficulties of circulating the activated carbon canister and blowing, making the whole test process simple to operate, safe and reliable, and highly efficient, ensuring the authenticity of the data.

[0034] In one embodiment, a plurality of sample clamping devices 4 may be included, and each of the sample clamping devices 4 is connected to the constant temperature machine 1 and the nitrogen supply device 9 through the connection method of the above embodiment, thereby achieving simultaneous testing of multiple samples.

[0035] Specifically, the coolant output interface is connected to the first distribution valve 2 through the third coolant pipe 19, the coolant input interface is connected to the second distribution valve 7 through the fourth coolant pipe 20, the output interface of the nitrogen supply device 9 is provided with a gas distributor 11, the first distribution valve 2, the second distribution valve 7 and the gas distributor 11 are provided with multiple interfaces, the first pipe joint 403 of each sample clamping device 4 is connected to the interface on the first distribution valve 2 through a first coolant pipe 3, the second pipe joint 406 is connected to the interface on the second distribution valve 7 through a second coolant pipe 6, the first gas pipe joint 404 is connected to the interface of the gas distributor 11 through a first gas pipe 12, and the second gas pipe joint 405 is connected to the corresponding first gas pipe 12 through a second gas pipe 14. Therefore, by dividing the distribution valve and the distributor into multiple paths, multiple samples can be tested at the same time.

[0036] In one embodiment, the thermostat 1 is provided with a coolant storage heater, a circulation pump with flow regulation, and a pressure regulator to ensure that the coolant with constant temperature, pressure and flow flows through the nylon tube sample 5 .

[0037] In one embodiment, a ball valve 10 is further provided between the nitrogen supply device 9 and the gas distributor 11, and the ball valve 10 is used to control the switch of the nitrogen supply device 9, thereby controlling the nitrogen to enter or stop entering the blowing circulation loop.

[0038] In one embodiment, each of the first gas pipes 12 is provided with a pressure regulating valve 13 for controlling the blowing pressure, and the second gas pipe 14 and the first gas pipe 12 are connected via a three-way joint 18, so that the gas entering the second gas pipe 14 enters the first input pipe, and the gas flows from the first input pipe to the accommodating cavity to the second gas pipe 14 and then back to the first gas pipe 12 to form a sealed gas path.

[0039] like Figure 2 As shown, in one embodiment, the sample holding device 4 includes a sealing cylinder 402 and a first sealing cover 401 and a second sealing cover 408 respectively installed at both ends of the sealing cylinder 402 in a sealing manner, the accommodating cavity is formed between the sealing cylinder 402 and the first sealing cover 401 and the second sealing cover 408, the first pipe joint 403 and the first air pipe joint 404 are arranged on the first sealing cover 401, and the second pipe joint 406 and the second air pipe joint 405 are arranged on the second sealing cover 408. This facilitates the installation and replacement of the nylon tube sample 5 in actual application, and improves the convenience of use of the detection device.

[0040] In one embodiment, a first O-ring 409 is provided between the first sealing cover 401, the second sealing cover 408 and the sealing cylinder 402, a second O-ring 407 is provided between the first pipe joint 403 and the first sealing cover 401, and between the second pipe joint 406 and the second sealing cover 408, the first air pipe joint 404 is welded to the first sealing cover 401, and the second air pipe joint 405 is welded to the second sealing cover 408. In this way, the sealing performance of the coolant circuit and the nitrogen purge circuit can be improved.

[0041] In this embodiment, the first sealing cover 401 and the second sealing cover 408 can be fixed to both ends of the sealing cylinder 402 by screws.

[0042] In one embodiment, the sealing cylinder 402 is made of transparent plexiglass to facilitate observation of changes in the sample. The first sealing cover 401 and the second sealing cover 408 are made of aluminum alloy to prevent rust and have good temperature stability, thereby improving the stability of the detection device. The sealing cylinder 402, the first sealing cover 401 and the second sealing cover 408 are all made through precision machining.

[0043] In this embodiment, a three-way ball valve 15, two activated carbon canisters and a gas delivery pump 17 are installed on the second gas delivery pipe 14. The three-way ball valve 15 is mainly used for exhaust and pressure relief, the activated carbon canister is used for collecting hydrocarbons, and the gas delivery pump 17 has a flow regulator that can adjust the blowing flow and circulate nitrogen. Then, a gas delivery circulation loop is formed by the nitrogen bottle, the ball valve 10, the gas distributor 11, the first gas delivery pipe 12, the three-way joint 18, the pressure regulating valve 13, the accommodating cavity in the sealing cylinder 402, the second gas delivery pipe 14, the three-way ball valve 15, the activated carbon canister (2) and the gas delivery pump 17.

[0044] In a specific application, a method for detecting the amount of coolant permeation in a nylon tube provided by an embodiment of the utility model is applied with a detection device of any of the above embodiments, and the method includes:

[0045] Step 1: Connect the two ends of the nylon tube sample 5 to be tested to the first pipe joint 403 and the second pipe joint 406 respectively, and connect all devices and pipelines;

[0046] Step 2: Turn on the thermostat 1, stop it when the pressure reaches the test pressure, check the sealing of the coolant circuit, and observe the pressure change of the pressure gauge of the thermostat 1. If it decreases, reseal it;

[0047] Step 3: After weighing the activated carbon canister and recording it, install the activated carbon canister between the three-way ball valve 15 and the gas delivery pump 17;

[0048] Step 4: Open the nitrogen supply device 9 to supply gas, adjust the pressure of the blowing circuit to the test pressure, then close the nitrogen supply device 9 to supply gas, check the sealing of the blowing circuit, observe the pressure change of the blowing circuit, and reseal it if it decreases;

[0049] Step 5: After the sealing is confirmed, open the three-way ball valve 15 to the exhaust position, open the nitrogen supply device 9 to supply gas, and after removing the moisture in the system, close the nitrogen supply device 9 and return the three-way ball valve 15 to the working position;

[0050] Step 6: Set the temperature of the high and low temperature environment box 8 to the test value, set the test values ​​of the coolant temperature, pressure and flow rate on the constant temperature machine 1; set the blowing pressure of the air pipeline, and set the blowing flow rate of the nitrogen supply device 9;

[0051] Step 7: Turn on the thermostat 1, turn on the nitrogen supply device 9, turn on the gas delivery pump 17, and start the test;

[0052] Step 8: After a preset time period, turn off the nitrogen supply device 9, stop the gas delivery pump 17, stop the thermostat 1, open the three-way ball valve 15 to the exhaust position to release the pressure, remove the activated carbon canister, weigh and record;

[0053] Step 9: Replace the activated carbon canister and repeat steps 3 to 8 above until the value stabilizes.

[0054] In a specific embodiment, in a specific application, a method for detecting the amount of coolant permeation in a nylon tube includes the following steps:

[0055] (1) Install the first O-ring 409 on the first sealing cover 401 and the second sealing cover 408, install the second O-ring 407 on the first pipe joint 403 and the second pipe joint 406, then install the first pipe joint 403 on the first sealing cover 401, and install the second pipe joint 406 on the second sealing cover 408. Connect the two ends of the nylon tube sample 5 to be tested to the first pipe joint 403 and the second pipe joint respectively. Fix the first sealing cover 401 and the second sealing cover 408 on the two ends of the sealing cylinder 402 respectively, and connect all devices and pipelines.

[0056] (2) Connect all pipelines, start the thermostat 1, and stop the machine after the pressure reaches the test pressure. Check the sealing of the coolant circuit and observe the pressure change on the pressure gauge of the thermostat 1. If it decreases, reseal it.

[0057] (3) Weigh the activated carbon canister (containing activated carbon) and record it, and install the activated carbon canister between the three-way ball valve 15 and the gas delivery pump 17;

[0058] (4) Open the nitrogen cylinder gas source valve and ball valve 10, adjust the pressure regulating valve 13 to make the pressure reach the test pressure, then close the ball valve 10, check the air tightness of the blowing circuit, observe the pressure change on the pressure gauge, and reseal if it is lower;

[0059] (5) After the sealing is confirmed, open the three-way ball valve 15 to the exhaust position, open the ball valve 10, remove the moisture from the system, close the ball valve 10 and the nitrogen bottle gas source valve, and return the three-way ball valve 15 to the working position;

[0060] (6) Set the temperature of the high and low temperature environment box 8 to the test value, set the test values ​​of the coolant temperature, pressure and flow rate on the constant temperature machine 1; set the blowing pressure on the pressure regulating valve 13, and set the blowing flow rate on the flow regulator;

[0061] (7) Turn on the thermostat 1, open the nitrogen bottle gas source valve and the ball valve 10, turn on the gas delivery pump 17, and start the test;

[0062] (8) After one cycle (48h or 72h), close the ball valve 10, stop the gas delivery pump 17, stop the thermostat 1, open the three-way ball valve 15 to the exhaust position to release the pressure, remove the activated carbon canister, weigh and record;

[0063] (9) Replace the activated carbon canister and repeat steps (3) to (8) until the value stabilizes.

[0064] Therefore, the utility model solves the technical problem of nylon tube coolant permeation test by being composed of a high and low temperature environment box for storing test samples, a coolant circulation system and an air blowing circulation system. It is divided into six paths by a distributor and can test 6 samples at the same time, realizing constant temperature and constant pressure circulation of the coolant inside the test sample, effectively solving the technical problem of circulating air blowing on the activated carbon tank, making the entire test process simple to operate, safe and reliable, and highly efficient, ensuring the authenticity of the data.

[0065] In the description of the present invention, in addition, the terms "first", "second", "another", and "yet another" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0066] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0067] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A nylon tube coolant penetration detection device, characterized in that: include: A thermostat, which is used to keep the temperature of the coolant constant and is provided with a coolant input interface and a coolant output interface; A sample holding device, wherein a sealed accommodating cavity is provided in the sample holding device, a first pipe joint and a first air pipe joint connected to the accommodating cavity are provided at one end of the sample holding device, and a second pipe joint and a second air pipe joint connected to the accommodating cavity are provided at the other end, the first pipe joint is connected to the coolant output interface through a first coolant pipe, and the second pipe joint is connected to the coolant input interface through a second coolant pipe, and the nylon tube sample to be tested is installed in the accommodating cavity and one end of the nylon tube sample is sealed and connected to the first pipe joint, and the other end is sealed and connected to the second pipe joint; A nitrogen supply device, the nitrogen supply device is connected to the first gas pipe joint through a first gas pipe, the second gas pipe joint is connected to the first gas pipe through a second gas pipe, and the nitrogen supply device is used to provide nitrogen; A high and low temperature environment box, wherein the sample holding device is arranged in the high and low temperature environment box, and the high and low temperature environment box is used to ensure the detection temperature of the coolant, the nylon tube sample to be tested and related components; Among them, the second gas pipeline is provided with a three-way ball valve, an activated carbon canister and a gas delivery pump in sequence. The gas delivery pump is close to the connection between the first gas pipeline and the second gas pipeline. The activated carbon canister is located between the three-way ball valve and the gas delivery pump for collecting hydrocarbons.

2. The nylon tube coolant penetration detection device according to claim 1, characterized in that: The sample clamping device comprises a plurality of the sample clamping devices, each of which is connected to the constant temperature machine and the nitrogen supply device.

3. The nylon tube coolant penetration detection device according to claim 2, characterized in that: The coolant output interface is connected to the first distribution valve through a third coolant pipe, the coolant input interface is connected to the second distribution valve through a fourth coolant pipe, a gas distributor is provided on the output interface of the nitrogen supply device, and multiple interfaces are provided on the first distribution valve, the second distribution valve and the gas distributor. The first pipe joint of each sample clamping device is connected to the interface on the first distribution valve through a first coolant pipe, the second pipe joint is connected to the interface on the second distribution valve through a second coolant pipe, the first gas pipe joint is connected to the interface of the gas distributor through a first gas pipe, and the second gas pipe joint is connected to the corresponding first gas pipe through a second gas pipe.

4. The nylon tube coolant penetration detection device according to any one of claims 1 to 3, characterized in that: The thermostat is provided with a coolant storage heater, a circulation pump with flow regulation, and a pressure regulator to ensure that the coolant with constant temperature, pressure and flow flows through the nylon tube sample.

5. The nylon tube coolant penetration detection device according to claim 3, characterized in that: A ball valve is also provided between the nitrogen supply device and the gas distributor.

6. The nylon tube coolant penetration detection device according to claim 3, characterized in that: Each of the first air supply pipes is provided with a pressure regulating valve for controlling the blowing pressure, and the second air supply pipes are connected to the first air supply pipes via a three-way joint.

7. A nylon tube coolant penetration detection device according to claim 1, characterized in that: The sample clamping device includes a sealing cylinder and a first sealing cover and a second sealing cover respectively sealed and installed at both ends of the sealing cylinder, the accommodating cavity is formed between the sealing cylinder and the first sealing cover and the second sealing cover, the first pipe joint and the first air pipe joint are arranged on the first sealing cover, and the second pipe joint and the second air pipe joint are arranged on the second sealing cover.

8. A nylon tube coolant penetration detection device according to claim 7, characterized in that: A first O-ring is provided between the first sealing cover, the second sealing cover and the sealing cylinder, a second O-ring is provided between the first pipe joint and the first sealing cover, and between the second pipe joint and the second sealing cover, the first air pipe joint is welded to the first sealing cover, and the second air pipe joint is welded to the second sealing cover.

9. A nylon tube coolant penetration detection device according to claim 8, characterized in that: The sealing cylinder is made of transparent organic glass, the first sealing cover and the second sealing cover are made of aluminum alloy, and the sealing cylinder, the first sealing cover and the second sealing cover are all made through precision machining.

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