Exhaust device for water pressure test of heat exchanger

Abstract

The application relates to the technical field of heat exchanger detection, in particular to an exhaust device for a water pressure experiment of a heat exchanger, which comprises a core body, a second end cover and a first end cover; the core body extends along the length direction of the heat exchanger, two ends of the core body are connected with the first end cover and the second end cover respectively, and the first end cover is connected with the exhaust device. An exhaust cavity is formed between the core body, the first end cover and the exhaust device; the exhaust device comprises an exhaust pipe, a connecting head and a cover, the connecting head is connected with the first end cover; the connecting head is provided with a through hole, the first end of the exhaust pipe extends into the exhaust cavity, the second end of the exhaust pipe is sealingly connected with the inner wall of the first end of the through hole; and the cover is used for being connected with the connecting head to block the second end of the through hole. The exhaust device on the heat exchanger is connected with a pressure test cover, therefore, the heat exchanger body does not need to be changed, the performance of the heat exchanger is guaranteed, and the exhaust device is easy to disassemble.

Description

Technical Field

[0001] This application relates to the field of heat exchanger testing technology, and in particular to an exhaust device for a water pressure test of a heat exchanger. Background Technology

[0002] During manufacturing and inspection, heat exchangers (such as aluminum plate-fin heat exchangers) can have their strength and airtightness verified through hydrostatic testing. Hydrostatic testing involves applying water pressure exceeding the operating pressure to verify the integrity and sealing performance of the heat exchanger structure. However, current methods for hydrostatic testing of heat exchangers often fail to completely expel the gas inside the heat exchanger. This results in the gas being compressed during the pressurization process, leading to a slow pressurization rate, prolonged test time, and potentially affecting the accuracy of the test results. Utility Model Content

[0003] Embodiments of this application provide an exhaust device for a water pressure test of a heat exchanger.

[0004] To achieve the aforementioned goal of increasing the speed of water pressure testing, the embodiments of this application adopt the following technical solution:

[0005] In a first aspect, embodiments of this application provide an exhaust device for a hydrostatic test of a heat exchanger. The heat exchanger includes a core, a second end cap, and a first end cap. The core extends along the length of the heat exchanger, and the first and second end caps are disposed at opposite ends of the core along its length, forming an exhaust chamber between the core and the first end cap. The exhaust device includes an exhaust pipe, a connector, and a cover. The connector is connected to the first end cap. The connector has a through hole, and a first end of the exhaust pipe extends into the exhaust chamber. The second end of the exhaust pipe is sealed to the inner wall of the first end of the through hole. The cover is used to connect to the connector to block the second end of the through hole.

[0006] According to the embodiments of this application, when the heat exchanger is subjected to a water pressure test, the exhaust device can exhaust the air through the exhaust pipe that extends into the exhaust chamber, thereby ensuring the exhaust effect of the heat exchanger.

[0007] In one possible implementation of the first aspect above, the first end cap includes an end cap frame and a connecting pipe. Along the length of the heat exchanger, the core, the end cap frame, and the connecting pipe are connected in sequence. The end cap frame and the side wall of the core facing the first end cap form an exhaust chamber. And along the length of the heat exchanger, a pressure test cover is provided at the end of the connecting pipe away from the end cap frame. The connector is connected to the pressure test cover.

[0008] According to the embodiments of this application, the connector on the exhaust device is connected to the pressure test cover. Therefore, no modification is required to the heat exchanger body, thereby ensuring the sealing performance and service life of the heat exchanger.

[0009] In one possible implementation of the first aspect described above, the distance between the first end of the exhaust pipe and the highest inner wall in the exhaust chamber along the height direction of the heat exchanger is less than a preset value.

[0010] According to an embodiment of this application, the first end of the exhaust pipe is close to the highest inner wall in the exhaust chamber, which can prevent the water level in the exhaust chamber from exceeding the first end of the exhaust pipe too early, so that the exhaust pipe can discharge more air, thereby ensuring the exhaust effect of the exhaust pipe.

[0011] In one possible implementation of the first aspect described above, the exhaust pipe includes a bend that abuts against the lower inner wall of the connecting pipe along the height direction of the heat exchanger to support the exhaust pipe.

[0012] According to the embodiments of this application, by supporting the exhaust pipe with the inner wall of the connecting pipe, the exhaust pipe can be prevented from falling to the top of the exhaust chamber due to gravity or other reasons, thereby ensuring the exhaust effect of the exhaust pipe.

[0013] In one possible implementation of the first aspect described above, the connector includes a first external thread section along the length of the connector, and the connector is sealed to the test cover through the first external thread section.

[0014] In one possible implementation of the first aspect described above, the connector also has a countersunk hole at the first end of the through hole, and the second end of the exhaust pipe is connected to the through hole through the countersunk hole.

[0015] In one possible implementation of the first aspect described above, a sealing ring is provided inside the countersunk hole, and the sealing ring is fitted onto the portion of the second end of the exhaust pipe that extends into the countersunk hole.

[0016] According to the embodiments of this application, the sealing ring can ensure the sealing effect between the exhaust pipe and the through hole.

[0017] In one possible implementation of the first aspect described above, the connector further includes a second external thread segment; the first and second external thread segments are located at opposite ends along the length of the connector; the cap has a threaded hole, and the cap is sealed to the second external thread segment of the connector through the threaded hole.

[0018] In one possible implementation of the first aspect described above, the venting device further includes a sealing gasket for filling between the bottom wall of the threaded hole and the second end of the through hole.

[0019] According to embodiments of this application, a sealing gasket can improve the sealing effect of the cover on the through hole, thereby ensuring the accuracy of the water pressure test of the heat exchanger.

[0020] In one possible implementation of the first aspect described above, the cap further includes a first polygonal block, the first polygonal block and the threaded hole being located at opposite ends of the cap along its length.

[0021] In embodiments of this application, the first polygonal block may be a cube or a hexagon to facilitate the installation and removal of the cap and connector.

[0022] In one possible implementation of the first aspect described above, the connector further includes a fixed segment located at the middle of the connector along its length direction; the projection of the fixed segment onto a first plane is a first polygon, and the first plane is perpendicular to the length direction of the connector.

[0023] According to an embodiment of this application, the connector and the test cover can be easily installed or removed via the fixing section.

[0024] In one possible implementation of the first aspect described above, the exhaust pipe is a flexible pipe.

[0025] According to an embodiment of this application, the flexible pipe facilitates bending of the exhaust pipe so that the exhaust pipe can be removed from the exhaust chamber after the water pressure test is completed.

[0026] In one possible implementation of the first aspect described above, the exhaust pipe is made of aluminum or copper. Attached Figure Description

[0027] Figure 1A A schematic diagram of a heat exchanger undergoing a water pressure test is shown.

[0028] Figure 1B A schematic diagram of a heat exchanger completing a water pressure test is shown;

[0029] Figure 2A A schematic diagram of a heat exchanger is shown according to an embodiment of this application;

[0030] Figure 2B According to some embodiments of this application, it is shown that Figure 2A A magnified view of a portion of the image;

[0031] Figure 3A According to some embodiments of this application, a side view of a connector is shown;

[0032] Figure 3B According to some embodiments of this application, a cross-sectional view of a connector is shown. Figure 3A (BB section diagram in the image);

[0033] Figure 4A According to some embodiments of this application, a side view of a cover is shown;

[0034] Figure 4B According to some embodiments of this application, a cross-sectional view of a cap is shown. Figure 4A (CC section diagram in the image);

[0035] Figure 5 According to some embodiments of this application, a schematic diagram of a cap and connector connection is shown;

[0036] Figure 6 According to some embodiments of this application, a schematic diagram of a heat exchanger excluding an exhaust device is shown. Detailed Implementation

[0037] The illustrative embodiments of this application include, but are not limited to, an exhaust device for a water pressure test of a heat exchanger.

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0039] As shown in the background section, current heat exchangers do not easily expel air from inside during water pressure testing, resulting in low water pressure testing efficiency and affecting the accuracy of the water pressure test.

[0040] In some embodiments, an exhaust port can be opened on the heat exchanger so that the heat exchanger can vent air through the exhaust port during the water pressure test, and then the exhaust port can be sealed after the water pressure test is completed.

[0041] For example, Figures 1A to 1B A schematic diagram of a heat exchanger is shown, wherein, Figure 1A A schematic diagram of a heat exchanger undergoing a water pressure test is shown. Figure 1B A schematic diagram of a heat exchanger completing a water pressure test is shown.

[0042] In various embodiments of this application, the length direction of the heat exchanger can be taken as the X direction, and the height direction of the heat exchanger can be taken as the Z direction, with the X and Z directions being perpendicular to each other.

[0043] Reference Figure 1A The heat exchanger 100 includes a core 10 extending in the X direction, and a first end cap 20 and a second end cap 30 disposed at opposite ends of the core 10 in the X direction. The first end cap 20 and the second end cap 30 can be fixedly connected to the core 10 by welding, thereby forming a closed cavity in the heat exchanger 100. The first end cap 20 includes a liquid outlet 21, and the second end cap 30 includes a liquid inlet 31. During the use of the heat exchanger 100, coolant (such as cryogenic liquefied gas or liquid, such as liquefied natural gas) can be filled through the liquid inlet 31 of the second end cap 30. After passing through the core 10, the coolant cools the contents of the core 10 and then flows out from the liquid outlet 21 of the first end cap 20, thus completing the cooling process.

[0044] When the heat exchanger 100 is undergoing water pressure testing, transportation, or storage, the liquid outlet 21 on the first end cap 20 and the liquid inlet 31 on the second end cap 30 can be covered by the pressure test cover 23 and the pressure test cover 32, respectively. For example, the pressure test cover 23 can be welded to the liquid outlet 21 and the pressure test cover 32 can be welded to the liquid inlet 31.

[0045] A valve 33 can be threaded onto the pressure test cover 32, allowing water to be introduced into the heat exchanger 100 during the water pressure test. A test hole 231 can be provided on the pressure test cover 23, which can be connected to a test device 01 (e.g., a device for measuring water pressure), thereby allowing the test device 01 to measure the water pressure inside the heat exchanger 100 and perform a water pressure test on the heat exchanger 100.

[0046] During the process of filling water into the heat exchanger 100, in order to expel the air inside the heat exchanger 100, an exhaust port 22 can be opened on the top of the first end cap 20 along the Z direction. The exhaust port 22 can connect the exhaust chamber 40 between the first end cap 20 and the core 10 to the outside, and the exhaust port 22 is connected to the air outlet pipe 50. In this way, when filling water into the heat exchanger 100, the air inside the heat exchanger 100 can be discharged through the exhaust chamber 40, the exhaust port 22 and the air outlet pipe 50.

[0047] After all the gas inside the heat exchanger 100 is discharged, the exhaust port 22 can be sealed, and then the water pressure inside the heat exchanger 100 can be tested by the testing device 01 to perform water pressure testing.

[0048] Reference Figure 1B After testing the water pressure inside the heat exchanger 100, the testing device 01 can be removed to drain the water from the heat exchanger 100 through the test hole 231. Then, the operator can remove the vent pipe 50 and seal the vent port 22 with the sealing block 60. For example, the sealing block 60 can be welded to the vent port 22 to complete the sealing of the first end cap 20. Alternatively, the vent port 22 can be directly welded to seal it.

[0049] It is understandable that while the above solution can effectively expel the gas inside the heat exchanger 100, it requires opening an exhaust port 22 on the first end cap 20. This necessitates modifications to the heat exchanger 100 itself, thus affecting its service life. Furthermore, during the process of sealing the exhaust port 22 with the sealing block 60 after the heat exchanger 100 completes the hydrostatic test, there is a risk of incomplete sealing, which may lead to a decrease in the sealing performance of the heat exchanger 100 and reduce its overall quality.

[0050] For example, because the exhaust port 22 is relatively small (its diameter is approximately 26 mm), welding the sealing block 60 to the exhaust port 22 or directly welding the exhaust port 22 may result in welding deviations that prevent the exhaust port 22 from sealing properly. Therefore, there is a risk of coolant leakage inside the heat exchanger 100. If the coolant is liquefied natural gas (LNG), the leaked LNG may also pose an explosion risk, potentially causing a safety accident.

[0051] To address the aforementioned problems, this application proposes a heat exchanger including an exhaust device that can be connected to a pressure test cap on the end cap (e.g., a first end cap) for sealing the liquid outlet of the end cap. The exhaust device also includes an exhaust pipe that extends into the top of an exhaust chamber between the end cap and the core to discharge gas from the heat exchanger.

[0052] It is understood that in this application, since the venting device is installed on the pressure test cover, its installation does not modify the heat exchanger body (e.g., it does not require opening holes in the heat exchanger body) and will not affect the performance of the heat exchanger body (e.g., the sealing performance and service life of the heat exchanger). Furthermore, the pressure test cover is not used during the heat exchanger's operation; therefore, even if the pressure test cover is modified, installing the venting device on it will not affect the heat exchanger's sealing performance, thus ensuring the quality of the heat exchanger. Moreover, extending the vent pipe into the top of the vent chamber ensures the discharge of gas inside the heat exchanger, guaranteeing effective venting.

[0053] The heat exchanger in the embodiments of this application is described below.

[0054] For example, Figure 2A and Figure 2B A schematic diagram of a heat exchanger is shown. Wherein, Figure 2A A schematic diagram of a heat exchanger is shown according to an embodiment of this application. Figure 2B According to some embodiments of this application, it is shown that Figure 2A A magnified view of a portion (part A).

[0055] The heat exchanger 100 in this embodiment includes a core 10, a first end cap 20, and a second end cap 30. The installation positions and connection relationships of the core 10, the first end cap 20, and the second end cap 30 can be referred to... Figure 1A and Figure 1B The embodiments described herein will not be repeated here.

[0056] Reference Figure 2AIn the embodiments of this application, the first end cap 20 includes a pressure test cover 23, an end cap frame 24, and a connecting pipe 25. Along the X direction, the core 10, the end cap frame 24, and the connecting pipe 25 are connected sequentially, with the end cap frame 24 and the sidewall of the core 10 facing the first end cap 20 forming an exhaust chamber 40. The connecting pipe 25 communicates with the exhaust chamber 40; in some embodiments, the interior of the connecting pipe 25 can also serve as part of the exhaust chamber 40. Along the X direction, the end of the connecting pipe 25 away from the end cap frame 24 is covered with the pressure test cover 23.

[0057] Reference Figure 2A and Figure 2B The heat exchanger 100 also includes an exhaust device 70, which includes an exhaust pipe 71, a connector 72, and a cap 73. In some embodiments of this application, the connector 72 is connected to the first cap 20. For example, the connector 72 may be threadedly connected to a pressure test cap 23 on the first cap 20. See also... Figure 2B A connection hole 232 is provided on the test cover 23. The connection hole 232 passes through the test cover 23 along the thickness direction (which can be the X direction in the figure). The connector 72 is connected to the connection hole 232 by a thread.

[0058] The connector 72 has a through hole 721 along its length (X direction), the exhaust pipe 71 passes through the connector hole 232, and the first end 711 of the exhaust pipe 71 extends into the exhaust chamber 40, and the second end 712 of the exhaust pipe 71 is sealed to the inner wall of the first end 7211 of the through hole 721.

[0059] Along the Z-direction, the distance between the first end 711 of the exhaust pipe 71 and the highest inner wall P in the exhaust chamber 40 is less than a preset value, which can be 0.5cm-1cm, for example, 0.5cm, 0.6cm, 0.7cm, etc. In this way, when the heat exchanger 100 is filled with water, more gas inside the heat exchanger 100 can be discharged from the exhaust pipe 71, preventing the water level in the exhaust chamber 40 from exceeding the first end 711 of the exhaust pipe 71, thus ensuring the exhaust effect of the exhaust pipe 71.

[0060] In embodiments of this application, the exhaust pipe 71 is a flexible pipe, allowing it to be bent so that after the second end 712 of the exhaust pipe 71 is connected to the first end 7211 of the through hole 721, the first end 711 of the exhaust pipe 71 can extend to a position near the upper inner wall P of the exhaust chamber 40. Alternatively, after completing the water pressure test, the exhaust pipe 71 can be withdrawn from the exhaust chamber 40. In embodiments of this application, the material of the exhaust pipe includes aluminum, copper, or aluminum alloy (e.g., 3003 material).

[0061] In the embodiments of this application, the exhaust pipe 71 includes a bent portion 713, which abuts against the lower inner wall of the connecting pipe 25 at position M along the Z direction to support the exhaust pipe 71. It can be understood that by supporting the bent portion 713 of the exhaust pipe 71 at position M of the lower inner wall of the connecting pipe 25, the first end 711 of the exhaust pipe 71 can be prevented from moving away from the upper inner wall P of the exhaust chamber 40 due to gravity or other factors. This ensures that the distance between the first end 711 of the exhaust pipe 71 and the upper inner wall P of the exhaust chamber 40 does not exceed a preset value, thereby ensuring the exhaust effect of the exhaust pipe 71.

[0062] The connector in the embodiments of this application is described below.

[0063] For example, Figure 3A and Figure 3B A schematic diagram of a connector is shown, wherein, Figure 3A According to some embodiments of this application, a side view of a connector is shown. Figure 3B According to some embodiments of this application, a cross-sectional view of a connector is shown. Figure 3A (BB cross-section diagram in the image).

[0064] Reference Figure 3A and Figure 3B Along the length of connector 72 (hereinafter referred to as the n-direction, which is the same as the X-direction after connector 72 is connected to test cover 23), connector 72 includes a first external thread section H1. Connector 72 is threaded to the connection hole 232 on test cover 23 via the first external thread 723 on the first external thread section H1. Connector 72 also has a countersunk hole 722 at the first end 7211 of through hole 721, and the second end 712 of exhaust pipe 71 communicates with through hole 721 via countersunk hole 722. (Refer to...) Figure 2B A sealing ring 74 is provided inside the countersunk hole 722. The sealing ring 74 is sleeved on the part of the second end 712 of the exhaust pipe 71 that extends into the countersunk hole 722, thereby improving the sealing performance of the connection between the exhaust pipe 71 and the through hole 721.

[0065] Continue to refer to Figure 3A and Figure 3B In some embodiments of this application, the connector 72 further includes a second external thread segment H3, wherein the first external thread segment H1 and the second external thread segment H3 are located at opposite ends of the connector 72 along the n-direction. (Refer to...) Figure 4A and Figure 4BThe end of the cover 73 along the length direction (hereinafter referred to as the m direction, after the connector 72 is connected to the test cover 23, and the n direction is the same as the X direction after the cover 73 is connected to the connector 72) has a threaded hole 731. The cover 73 is threadedly connected to the second thread 724 on the second external thread section H3 of the connector 72 through the threaded hole 731, so that the cover 73 can block the second end 7212 of the through hole 721 of the connector 72.

[0066] Reference Figure 5 , Figure 5 According to some embodiments of this application, a schematic diagram of a cap 73 connected to a connector 72 is shown.

[0067] In some embodiments of this application, the venting device 70 further includes a sealing gasket 75, which is used to fill the space between the bottom wall of the threaded hole 731 and the second end 7212 of the through hole 721 to ensure the sealing performance of the cover 73 to the through hole 721.

[0068] Reference Figure 5 After the connector 72 is threadedly connected to the threaded hole 731 of the cover 73 through the second thread 724, the n direction and the m direction are in the same direction. Along the m direction, the sealing gasket 75 is filled between the second end 7212 of the through hole 721 and the bottom wall 733 of the threaded hole 731 to ensure the sealing effect of the cover 73 on the through hole 721.

[0069] Reference Figure 3A and Figure 3B In some embodiments of this application, the connector 72 further includes a fixed segment H2. Along the n-direction, the fixed segment H2 is located at the middle of the connector 72. The projection of the fixed segment H2 along the first plane is a first polygon. The first plane is perpendicular to the n-direction. For example, refer to... Figure 3A In some embodiments of this application, the cross-section of the fixing segment H2 on the first plane can be hexagonal to facilitate the connection or disassembly of the connector 72 and the test cover 23 through the fixing segment H2. In other embodiments, the first polygon can also be quadrilateral, octagonal, etc.

[0070] Reference Figure 4A and Figure 4B In some embodiments of this application, the cover 73 further includes a first polygonal block 732, and the first polygonal block 732 and the threaded hole 731 are respectively disposed at opposite ends of the cover 73 along the m direction. The first polygonal block 732 facilitates the connection between the cover 73 and the connector 72. In some embodiments of this application, the first polygonal block 732 is a square block; in other embodiments, the first polygonal block 732 can also be a hexagonal block, an octagonal block, etc.

[0071] Reference Figure 2AIn some embodiments of this application, the exhaust device 70 can be first connected to the pressure test cover 23 by threads, and the first end 711 of the exhaust pipe 71 can be positioned at the highest inner wall P along the Z direction of the end cap frame 24, and the bent portion 713 of the exhaust pipe 71 can be abutted against the M point of the connecting pipe 25 to support the exhaust pipe 71. Then, the first end cap 20 is welded to the core 10. After welding, the inner wall of the end cap frame 24 and the core 10 form the exhaust chamber 40.

[0072] When performing a water pressure test on the heat exchanger 100, water can be filled through the valve 33 on the test cover 32 of the second end cap 30. The water gradually fills the core 10 and the exhaust chamber 40. The air in the core 10 and the exhaust chamber 40 is discharged from the first end 711 of the exhaust pipe 71. Since the first end 711 of the exhaust pipe 71 is located at the highest inner wall P of the exhaust chamber 40, the water level in the exhaust chamber 40 will not exceed the first end 711 of the exhaust pipe 71 too early, thus ensuring the exhaust effect of the exhaust pipe.

[0073] After the heat exchanger 100 is filled with water, the water is discharged through the first end 711 of the vent pipe 71. At this time, the cover 73 is connected to the second thread 724 of the connector 72 so that the cover 73 can seal the through hole 721 on the connector 72. Then, the water pressure inside the heat exchanger 100 can be measured at the liquid outlet 21 by the testing device 01 to perform water pressure testing.

[0074] After the water pressure test is completed, the venting device 70 can be removed from the pressure test cover 23. For example, the connector 72 can be removed from the pressure test cover 23. Since the vent pipe 71 is bendable, it can be pulled out from the connection hole 232 of the pressure test cover 23.

[0075] For example, Figure 6 According to some embodiments of this application, a schematic diagram of a heat exchanger excluding an exhaust device is shown.

[0076] Reference Figure 6 After the water pressure test is completed, the heat exchanger 100 remains unchanged except for the connection hole 232 retained at the pressure test cover 23. Therefore, the water pressure test process will not affect the sealing performance of the heat exchanger 100. Furthermore, the pressure test cover 23 is not required during the use of the heat exchanger 100; therefore, the connection hole 232 retained on the pressure test cover 23 will not affect the use of the heat exchanger 100, thus ensuring the quality of the heat exchanger 100.

[0077] In the above description of this embodiment, unless otherwise stated, " / " means "or," for example, A / B can identify A or B; the "and / or" in this document is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, B existing alone, and A and B existing simultaneously. Furthermore, in this embodiment, the values ​​of each data range include end values. For example, A = 10~50 means that A can include 10 or 50.

Claims

1. An exhaust device for a water pressure test of a heat exchanger, characterized in that, The heat exchanger includes a core, a second end cap, and a first end cap; The core extends along the length of the heat exchanger, and the first end cap and the second end cap are disposed at opposite ends of the core along the length, forming an exhaust chamber between the core and the first end cap; The exhaust device includes an exhaust pipe, a connector, and a cover, wherein the connector is connected to the first cover. The connector has a through hole, the first end of the exhaust pipe extends into the exhaust chamber, and the second end of the exhaust pipe is sealed to the inner wall of the first end of the through hole; The cap is used to connect with the connector to block the second end of the through hole.

2. The exhaust device as described in claim 1, characterized in that, The first end cap includes an end cap frame and a connecting pipe. Along the length of the heat exchanger, the core, the end cap frame, and the connecting pipe are connected in sequence. The end cap frame and the side wall of the core facing the first end cap form the exhaust chamber; Furthermore, a pressure test cover is installed at the end of the connecting pipe away from the end cap frame along the length of the heat exchanger. The connector is connected to the test pressure cover.

3. The exhaust device as described in claim 2, characterized in that, Along the height direction of the heat exchanger, the distance between the first end of the exhaust pipe and the highest inner wall in the exhaust chamber is less than a preset value.

4. The exhaust device as described in claim 2, characterized in that, The exhaust pipe includes a bend that abuts against the lower inner wall of the connecting pipe along the height direction of the heat exchanger to support the exhaust pipe.

5. The exhaust device as described in claim 2, characterized in that, Along the length of the connector, the connector includes a first external thread section, and the connector is sealed to the test cover through the first external thread section.

6. The exhaust device as described in claim 5, characterized in that, The connector also has a countersunk hole at the first end of the through hole, and the second end of the exhaust pipe is connected to the through hole through the countersunk hole.

7. The exhaust device as described in claim 6, characterized in that, A sealing ring is provided inside the countersunk hole, and the sealing ring is fitted onto the portion of the second end of the exhaust pipe that extends into the countersunk hole.

8. The exhaust device as described in claim 5, characterized in that, The connector also includes a second external thread section. The first external thread segment and the second external thread segment are located at opposite ends along the length of the connector; The cap has a threaded hole, and the cap is sealed to the second external threaded section of the connector through the threaded hole.

9. The exhaust device as described in claim 8, characterized in that, The venting device also includes a sealing gasket for filling between the bottom wall of the threaded hole and the second end of the through hole.

10. The exhaust device as claimed in claim 8, characterized in that, The cap also includes a first polygonal block, the first polygonal block and the threaded hole being located at opposite ends of the cap along its length.

11. The exhaust device as claimed in claim 1, characterized in that, The connector also includes a fixing section, which is located at the middle of the connector along its length. The projection of the fixed segment along the first plane is a first polygon, and the first plane is perpendicular to the length direction of the connector.

12. The exhaust device as claimed in claim 1, characterized in that, The exhaust pipe is a flexible pipe.

13. The exhaust device as claimed in claim 1, characterized in that, The exhaust pipe is made of aluminum or copper.

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