Exhaust device for water pressure test

Abstract

This application relates to the field of heat exchanger testing technology, and particularly to an exhaust device for a hydrostatic test, used in a heat exchanger comprising a core, a second end cap, and a first end cap. An exhaust chamber is formed between the core and the first end cap. The exhaust device includes a first connector, a second connector, and an exhaust pipe. The first connector includes a first opening, a second opening, and a third opening that communicate with each other. The first opening connects to the first end cap, the second opening connects to the hydrostatic test device, and the third opening connects to the second connector. The exhaust pipe connects to the second connector and extends into the exhaust chamber through the third opening and the first opening. The exhaust device on this heat exchanger is connected to a test hole on the pressure test cover that connects to the hydrostatic test device. Therefore, no modifications to the heat exchanger body are required, thus ensuring the performance of the heat exchanger. Furthermore, the first connector can be adapted to pressure test covers of different sizes, making it more versatile.

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. 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 structural integrity and sealing performance of the heat exchanger. However, current methods for hydrostatic testing of heat exchangers require additional vents on the heat exchanger heads for venting. This alters the structural integrity of the heat exchanger, making it more susceptible to leaks, which may affect the test results and the overall performance of the heat exchanger. Utility Model Content

[0003] An embodiment of this application provides an exhaust device for a water pressure test.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, embodiments of this application provide an exhaust device for a hydrostatic test, used in a heat exchanger. The heat exchanger includes a core, a first end cap, and a second end cap. The core extends along the length of the heat exchanger, and the first and second end caps are located in two different regions along the length of the core, forming an exhaust chamber between the core and the first end cap. The exhaust device includes a first connector, a second connector, and an exhaust pipe. The first connector includes a first opening, a second opening, and a third opening that communicate with each other. The first opening is connected to the first end cap, the second opening is connected to a hydrostatic test device, and the third opening is connected to the second connector. The exhaust pipe is connected to the second connector and extends into the exhaust chamber via the third opening and the first opening.

[0006] According to an embodiment of this application, the first connector of the venting device is connected to an opening on the first end cap for connecting to a water pressure testing device for water pressure testing via a first opening, and the second opening is connected to the water pressure testing device, thereby enabling a water pressure test on the heat exchanger. Furthermore, the second connector of the venting device for venting is connected to the third opening of the first connector. Therefore, the installation of the venting device does not require modification to the heat exchanger body (e.g., no opening of the heat exchanger body or the pressure test cover on the heat exchanger is needed), and thus the venting device does not affect the performance of the heat exchanger body, such as its sealing performance and service life. Moreover, by extending the vent pipe into the venting chamber, the exhaust of gas inside the heat exchanger is ensured, guaranteeing the venting effect.

[0007] In one possible implementation of the first aspect described above, the first end cap includes an end cap frame and a connecting pipe, with the core, end cap frame, and connecting pipe connected sequentially along the length of the heat exchanger. The end cap frame and the sidewalls of the core facing the first end cap form an exhaust chamber, and a pressure test cover is provided at the end of the connecting pipe away from the end cap frame. The first opening of the first connector is connected to the pressure test cover.

[0008] In some embodiments of this application, one end of the connecting pipe along the length of the heat exchanger is connected to the end cap frame, and the other end is connected to the pressure test cover. The first connector can be connected to an opening on the pressure test cover for connecting a hydrostatic testing device; therefore, no additional opening is required for the pressure test cover. The first connector can also be connected to pressure test covers of different sizes, thereby improving the applicability of the first connector.

[0009] In one possible implementation of the first aspect described above, the portion of the first connector with the first opening is provided with a first external thread segment. The pressure test cover includes a fourth opening, and the inner wall of the fourth opening is provided with a first internal thread segment that matches the first external thread segment. The pressure test cover and the first connector are threadedly connected by the first external thread segment and the first internal thread segment.

[0010] In one possible implementation of the first aspect described above, the first connector includes an intermediate section, and along the length direction of the first connector, a first external threaded section is sequentially connected to the intermediate section, and the outer diameter of the intermediate section is larger than the outer diameter of the first external threaded section, such that the intermediate section and the first external threaded section form a first stepped surface. When the first connector is connected to the test pressure cover, the first stepped surface fits against the first sidewall of the test pressure cover facing the first connector.

[0011] In some embodiments of this application, the first stepped surface formed by the intermediate section and the first external thread section can fit against the first sidewall of the pressure test cover, thereby improving the sealing performance of the first joint and the pressure test cover, and ensuring the efficiency and accuracy of the water pressure test on the heat exchanger.

[0012] In one possible implementation of the first aspect described above, a sealing ring is provided between the first sidewall and the first step surface.

[0013] In some embodiments of this application, the sealing ring between the first sidewall and the first stepped surface can further improve the sealing performance between the first joint and the test cover, thereby further ensuring the efficiency and accuracy of hydrostatic testing of the heat exchanger.

[0014] In one possible implementation of the first aspect described above, the first connector includes a first through hole and a second through hole, the first through hole extending along a first direction and the second through hole extending along a second direction. The first through hole penetrates the first connector, and a first opening and a second opening are two openings of the first through hole along the first direction. A third opening is one opening of the second through hole along the second direction, and the other opening of the second through hole along the second direction communicates with the first through hole. The angle between the first direction and the second direction is greater than or equal to 15° and less than or equal to 60°.

[0015] In some embodiments of this application, the angle between the first direction and the second direction is greater than or equal to 15° and less than or equal to 60°, which facilitates the connection between the second connector and the third opening of the first connector for the installation of an exhaust pipe. Preferably, the angle between the first direction and the second direction is 30°.

[0016] In one possible implementation of the first aspect described above, the first joint further includes a fixed section, and along the length direction of the first joint, a first external thread section, an intermediate section, and a fixed section are connected sequentially. The intermediate section and the fixed section form two second stepped surfaces facing away from each other along a third direction, which is perpendicular to the length direction of the first joint.

[0017] In the embodiments of this application, the two second stepped surfaces can conveniently clamp the first connector, thereby facilitating the connection of the first connector to the test pressure cover.

[0018] In one possible implementation of the first aspect described above, the second and third openings are located in a fixed section.

[0019] The second opening is located in the fixed section to facilitate the connection of the water pressure testing device, and the third opening is located in the fixed section to facilitate the connection of the second connector.

[0020] In one possible implementation of the first aspect described above, the second connector is connected to the third open thread, and the second connector is connected to the first end of the exhaust pipe.

[0021] In one possible implementation of the first aspect described above, the distance between the second 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.

[0022] In one possible implementation of the first aspect described above, the exhaust pipe is a flexible pipe.

[0023] In one possible implementation of the first aspect described above, the exhaust pipe is made of aluminum or copper. Attached Figure Description

[0024] Figure 1A A schematic diagram of a heat exchanger undergoing a water pressure test is shown.

[0025] Figure 1BA schematic diagram of a heat exchanger completing a water pressure test is shown;

[0026] Figure 2A A schematic diagram of a heat exchanger with an exhaust device is shown according to an embodiment of this application;

[0027] Figure 2B According to some embodiments of this application, it is shown that Figure 2A A magnified view of a portion (part A).

[0028] Figure 3A According to some embodiments of this application, a side view of a first connector is shown;

[0029] Figure 3B According to some embodiments of this application, a front view of a first connector is shown;

[0030] Figure 3C According to some embodiments of this application, a cross-sectional view of a first connector is shown. Figure 3A (BB section diagram in the image);

[0031] Figure 4A According to some embodiments of this application, a side view of a second connector is shown;

[0032] Figure 4B According to some embodiments of this application, a cross-sectional view of a second connector is shown. Figure 4A (CC section diagram in the image);

[0033] Figure 5 According to some embodiments of this application, a schematic diagram of a connection between a cap 75 and a second connector 73 is shown;

[0034] Figure 6A According to some embodiments of this application, a side view of a cover is shown;

[0035] Figure 6B According to some embodiments of this application, a cross-sectional view of a cap is shown. Figure 6A (DD cross-section diagram in the middle);

[0036] Figure 7 According to some embodiments of this application, a schematic diagram of a heat exchanger excluding an exhaust device is shown. Detailed Implementation

[0037] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0038] The illustrative embodiments of this application include, but are not limited to, an exhaust device for a water pressure test.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 water pressure testing device 01 (e.g., a pressure valve for measuring water pressure), thereby measuring the water pressure inside the heat exchanger 100 to perform a water pressure test on the heat exchanger 100.

[0047] 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.

[0048] 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 water pressure testing device 01 to perform water pressure testing.

[0049] Reference Figure 1B After testing the water pressure inside the heat exchanger 100, the water pressure testing device 01 can be removed to drain the water from the heat exchanger 100 through the test hole 231. Then, the operator can cut off the exhaust pipe 50 and seal the exhaust port 22 with the sealing block 60. For example, the sealing block 60 can be welded to the exhaust port 22 to complete the sealing of the first end cap 20. Alternatively, the exhaust port 22 can be directly welded to seal it.

[0050] 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.

[0051] 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.

[0052] To address the aforementioned problems, this application proposes an exhaust device for a hydrostatic test, used in a heat exchanger. The heat exchanger includes a core, a first end cap, and a second end cap. The core extends along the length of the heat exchanger, and the first and second end caps are located at opposite ends of the core along its length, forming an exhaust chamber between the core and the first end cap.

[0053] The venting device includes a first connector, a second connector, and an vent pipe. The first connector includes a first opening, a second opening, and a third opening that communicate with each other. The first opening is connected to a first end cap, the second opening is connected to a water pressure testing device, and the third opening is connected to the second connector. The vent pipe is connected to the second connector and extends into the venting chamber through the third opening and the first opening.

[0054] It is understood that in this application, the first connector of the venting device is connected to the end cap through the first opening, and the second opening is connected to the water pressure testing device, thereby enabling a water pressure test on the heat exchanger. Furthermore, the second connector of the venting device for venting is connected to the third opening of the first connector. Therefore, the installation of the venting device does not require modification to the heat exchanger body (e.g., no openings are needed in the heat exchanger body or the pressure test cover). The first connector can be connected using the opening where the end cap connects to the water pressure testing device; therefore, the venting device does not affect the performance of the heat exchanger body (e.g., the sealing performance and service life of the heat exchanger). Moreover, by extending the vent pipe into the venting chamber, the exhaust of gas inside the heat exchanger is ensured, guaranteeing the venting effect.

[0055] The heat exchanger in the embodiments of this application is described below.

[0056] 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 with an exhaust device 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).

[0057] 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.

[0058] 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. The end cap frame 24 and the sidewall 11 of the core 10 facing the first end cap 20 form 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. One end of the connecting pipe 25 along the X direction is connected to the end cap frame 24, and the other end is covered with the pressure test cover 23.

[0059] Reference Figure 2A and Figure 2B The heat exchanger 100 also includes an exhaust device 70, which includes an exhaust pipe 71, a first connector 72, and a second connector 73. In some embodiments of this application, the first connector 72 is connected to the first end cap 20. For example, the first connector 72 may be threadedly connected to a pressure test cap 23 on the first end cap 20. See also... Figure 2B The first connector 72 can be threadedly connected to the test hole 231 (as an example of a fourth opening).

[0060] The first connector 72 has a first through hole 721 along its length direction (n1 direction, which is parallel to the X direction when the first connector 72 is connected to the test cover 23). The first through hole 721 extends along the n1 direction (as an example of a second direction) and passes through the first connector 72. The two opposite ends of the first through hole 721 along the n1 direction include a first opening 7211 and a second opening 7212. The first connector 72 also includes a second through hole 722, which extends along the n2 direction. One end of the second through hole 722 along the n2 direction includes a third opening 7221, and the portion of the second through hole 722 located at the third opening 7221 is threaded so that the second connector 73 is connected to the third opening 7221 by a thread. The opening at the other end of the second through hole 722 communicates with the first through hole 721. The angle between the n2 direction and the n1 direction is 15° to 60°. For example, the angle can be 15°, 30°, 45° or 60°, and the preferred angle is 30°.

[0061] In some embodiments of this application, the second connector 73 has a third through hole 731 along its length direction (n3 direction, which is parallel to the n2 direction when the second connector 73 is connected to the first connector 72). The exhaust pipe 71 is connected to the second connector 73, and the exhaust pipe 71 extends into the exhaust chamber 40 through the third opening 7221, the second through hole 722, the first through hole 721, the first opening 7211, and the test hole 231. 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 7311 of the third through hole 731.

[0062] 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.

[0063] 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 7311 of the third through hole 731, 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).

[0064] The first connector 72 in the embodiments of this application will now be described.

[0065] For example, Figures 3A to 3C A schematic diagram of a first connector 72 is shown, wherein, Figure 3A According to some embodiments of this application, a side view of a first connector is shown. Figure 3B According to some embodiments of this application, a front view of a first connector is shown. Figure 3C According to some embodiments of this application, a cross-sectional view of a first connector is shown. Figure 3A (BB cross-section diagram in the image).

[0066] Reference Figures 3A to 3C and combined Figure 2B The first connector 72 has a first external thread section D1 at the part with the first opening 7211. The inner wall of the test hole 231 of the test cover 23 is provided with a first internal thread section 2311 that matches the first external thread section D1. The test cover 23 and the first connector 72 are threadedly connected by the first external thread section D1 and the first internal thread section 2311.

[0067] The first connector 72 includes an intermediate section D2. Along the length of the first connector 72, a first external thread section D1 is sequentially connected to the intermediate section D2, and the outer diameter r1 of the intermediate section D2 is larger than the outer diameter r2 of the first external thread section D1, so that the intermediate section D2 and the first external thread section D1 form a first stepped surface T1. Thus, when the first connector 72 is connected to the pressure test cover 23, the first stepped surface T1 fits against the first sidewall 2312 of the pressure test cover 23 facing the first connector 72, thereby ensuring the sealing of the connection between the first connector 72 and the pressure test cover 23 and improving the efficiency of the hydrostatic test.

[0068] In some embodiments of this application, a sealing ring 723 is provided between the first sidewall 2312 and the first stepped surface T1. The sealing ring 723 can further improve the sealing effect of the connection between the first joint 72 and the test cover 23.

[0069] The first connector 72 also includes a fixed section D3. Along the n1 direction, the first external thread section D1, the intermediate section D2, and the fixed section D3 are connected sequentially. The intermediate section D2 and the fixed section D3 form two second stepped surfaces T2 that are opposite to each other along the width direction of the first connector 72 (as an example of a third direction, it can be referred to as the n4 direction below), and the n4 direction is perpendicular to the length direction of the first connector 72. In this way, the first connector 72 can be easily clamped by a clamp so that the first connector 72 is connected to the test cover 23 by threads.

[0070] In some embodiments of this application, the second opening 7212 and the third opening 7221 are formed in the fixed section D3. This facilitates the connection of the second opening 7212 to the water pressure testing device 01, and facilitates the connection of the third opening 7221 to the second connector 73. (Refer to...) Figure 3C The included angle α between the axes of the first through hole 721 and the second through hole 722 of the first connector 72 can be 15° to 30°, which facilitates the installation of the second connector 73.

[0071] In some embodiments of this application, the first connector 72 can be machined from a round bar with a round hole in the middle, forming a first through hole 721. A second through hole 722 can then be machined on the side wall of the round bar, and a chamfer 724 can be machined at the third opening 7221 of the second through hole 722. The chamfer 724 is perpendicular to the axis of the second through hole 722. That is, the included angle between the chamfer 724 and the side of the first connector 72 where the second opening 7212 is located is also α, thus facilitating the installation of the second connector 73.

[0072] In some embodiments of this application, for test caps 23 that are small in size and inconvenient to have additional openings, the second connector 73 and the exhaust pipe 71 can still be connected through the first connector 72. Therefore, the first connector 72 can be connected to test caps 23 of different sizes, thereby improving the applicability of the first connector 72.

[0073] The second connector 73 in the embodiments of this application will now be described.

[0074] For example, Figure 4A and Figure 4B A schematic diagram of a second connector 73 is shown, wherein, Figure 4A According to some embodiments of this application, a side view of a second connector is shown. Figure 4B According to some embodiments of this application, a cross-sectional view of a second connector is shown. Figure 4A (CC section diagram).

[0075] Reference Figure 4A and Figure 4B Along the length of the second connector 73, the second connector 73 includes a second external thread section H1, which is threadedly connected to the third opening 7221 on the first connector 72. The second connector 73 also has a countersunk hole 732 at the first end 7311 of the third through hole 731, through which the second end 712 of the exhaust pipe 71 communicates with the third through hole 731. (Refer to...) Figure 2B A sealing ring 74 is provided inside the countersunk hole 732. 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 732, thereby improving the sealing performance of the connection between the exhaust pipe 71 and the third through hole 731.

[0076] Continue to refer to Figure 4A and Figure 4B In some embodiments of this application, the second connector 73 further includes a third external thread section H3. The second external thread section H1 and the third external thread section H3 are located at opposite ends of the second connector 73 along the n3 direction. The third external thread section H3 is used to connect the cap.

[0077] Reference Figure 5 , Figure 5 According to some embodiments of this application, a schematic diagram of a cap 75 connected to a second connector 73 is shown.

[0078] In some embodiments of this application, the exhaust device 70 further includes a cover 75 and a sealing gasket 76. The cover 75 has a threaded hole 751 at its end along the length direction (hereinafter referred to as the m direction, which is the same as the n3 direction after the cover 75 is connected to the second connector 73). The cover 75 is threadedly connected to the third external thread segment H3 of the second connector 73 through the threaded hole 751, so that the cover 75 can block the second end 7312 of the third through hole 731 of the second connector 73.

[0079] The sealing gasket 76 is used to fill the space between the bottom wall of the threaded hole 751 and the second end 7312 of the third through hole 731 to ensure the sealing performance of the cap 75 to the third through hole 731.

[0080] Reference Figure 5 After the second connector 73 is threadedly connected to the threaded hole 751 of the cover 75 through the third external thread section H3, the n3 direction and the m direction are in the same direction. Along the m direction, the sealing gasket 76 is filled between the second end 7312 of the third through hole 731 and the bottom wall 753 of the threaded hole 751 to ensure the sealing effect of the cover 75 on the third through hole 731.

[0081] Continue to refer to Figure 4A and Figure 4B In some embodiments of this application, the second connector 73 further includes a fixing segment H2. Along the n3 direction, the fixing segment H2 is located at the middle of the second connector 73. The projection of the fixing segment H2 along the first plane is a first polygon. The first plane is perpendicular to the n3 direction. For example, refer to... Figure 4A 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 second connector 73 and the first connector 72 through the fixing segment H2. In other embodiments, the first polygon can also be quadrilateral, octagon, etc.

[0082] Reference Figure 6A and Figure 6B In some embodiments of this application, the cover 75 further includes a first polygonal block 752, and the first polygonal block 752 and the threaded hole 751 are respectively disposed at opposite ends of the cover 75 along the m direction. The first polygonal block 752 facilitates the connection between the cover 75 and the second connector 73. In some embodiments of this application, the first polygonal block 752 is a square block; in other embodiments, the first polygonal block 752 can also be a hexagonal block, an octagonal block, etc.

[0083] Reference Figure 2A In some embodiments of this application, the first connector 72 of the exhaust device 70 can be threadedly connected to the test hole 231 of the pressure test cover 23 via the first external thread section D1. Preferably, 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 second end 712 of the exhaust pipe 71 can be inserted into the first through hole 721 of the first connector 72 via the connecting pipe 25 and the test hole 231 of the pressure test cover 23. The second end 712 of the exhaust pipe 71 can then be inserted into the second through hole 722 via the first through hole 721, and then protrude from the third opening 7221 of the second through hole 722, so that the second end 712 of the exhaust pipe 71 can be connected to the second connector 73.

[0084] In other embodiments, the first end 711 of the exhaust pipe 71 may extend from the third opening 7221 of the first connector 72 into the second through hole 722, and extend out of the first connector through the second through hole 722, the first through hole 721 and the first opening 7211, and the first end 711 of the exhaust pipe 71 may be positioned at the position of the highest inner wall P along the Z direction of the end cap frame 24.

[0085] After setting up the exhaust pipe 71, it can be cut to adjust its length. Then, the second end 712 of the exhaust pipe 71 is connected to the countersunk hole 732 of the second connector 73 via a sealing ring 74. The second end 712 of the exhaust pipe 71 is then passed through the third through hole 731 of the second connector 73, flush with the second end 7312 of the third through hole 731. This ensures that when installing or removing the second connector 73, the second end 712 of the exhaust pipe 71 is exposed outside the third opening 7221 of the first connector 72, facilitating the installation and removal of the exhaust pipe 71 from the second connector 73. After the second end 712 of the exhaust pipe 71 extends into the third through hole 731 of the second connector 73, the second external thread section H1 of the second connector 73 can be threadedly connected to the third opening 7221 to ensure the sealing between the second connector 73 and the first connector 72.

[0086] After installing the exhaust pipe 71 and the second connector 73, the first end cap 20 can be welded to the core 10. After welding, the inner wall of the end cap frame 24 and the core 10 form an exhaust chamber 40. In some embodiments of this application, an endoscope can be inserted into the exhaust chamber 40 through the second opening 7212, the first through hole 721, and the first opening 7211 to check whether the interior of the first end cap 20 is welded to the core 10, thereby ensuring the stability of the welding between the first end cap 20 and the core 10.

[0087] 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.

[0088] After the heat exchanger 100 is filled with water, the water is discharged through the first end 711 of the vent pipe 71. After the water is discharged, the sealing gasket 76 can be attached to the second end 712 of the vent pipe 71, and the cover 75 is threadedly connected to the third external thread section H3 of the second connector 73. This allows the cover 75 to seal the third through hole 731 on the second connector 73, and the sealing gasket 76 to block the second end 7312 of the third through hole 731, thereby improving the sealing effect of the second connector 73. Then, the water pressure inside the heat exchanger 100 can be measured at the second opening 7212 of the first connector 72 using the water pressure testing device 01, thus performing a water pressure test.

[0089] In other embodiments, the water pressure testing device 01 can be threadedly connected to the third external thread segment H3 of the second connector 73, and the second opening 7212 can be sealed by the plug 77 to perform the water pressure test.

[0090] After the water pressure test is completed, the venting device 70 can be removed from the pressure test cover 23. For example, the second connector 73 can be removed from the pressure test cover 23. Since the vent pipe 71 is bendable, it can be pulled out from the test hole 231 of the pressure test cover 23.

[0091] For example, Figure 7 According to some embodiments of this application, a schematic diagram of a heat exchanger excluding an exhaust device is shown.

[0092] Reference Figure 7 After the water pressure test is completed and the exhaust device 70 is removed, the overall structure of the heat exchanger 100 remains unchanged. Therefore, the water pressure test process will not affect the sealing performance of the heat exchanger 100, thus ensuring the quality of the heat exchanger 100.

[0093] 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 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 and 50.

Claims

1. An exhaust device for a water pressure test, characterized in that, For use in a heat exchanger, the heat exchanger includes a core, a first end cap, and a second end cap; The core extends along the length of the heat exchanger, and the first end cap and the second end cap are disposed in two different regions along the length of the core, forming an exhaust chamber between the core and the first end cap; The exhaust device includes a first connector, a second connector, and an exhaust pipe. The first connector includes a first opening, a second opening, and a third opening that are interconnected. The first opening is connected to the first end cap, the second opening is connected to the water pressure testing device, and the third opening is connected to the second connector; the exhaust pipe is connected to the second connector, and the exhaust pipe extends into the exhaust chamber through the third opening and the first opening.

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, and the core, the end cap frame and the connecting pipe are connected sequentially along the length of the heat exchanger; 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 on the end of the connecting pipe furthest from the end cap frame; The first opening of the first connector is connected to the test pressure cover.

3. The exhaust device as described in claim 2, characterized in that, The portion of the first connector that forms the first opening is provided with a first external thread section; The test pressure cover includes a fourth opening, and the inner sidewall of the fourth opening is provided with a first internal thread segment that matches the first external thread segment; The test cover and the first connector are connected by the first external thread section and the first internal thread section.

4. The exhaust device as described in claim 3, characterized in that, The first connector includes an intermediate section. Along the length of the first connector, the first external thread section is sequentially connected to the intermediate section, and the outer diameter of the intermediate section is larger than the outer diameter of the first external thread section, so that the intermediate section and the first external thread section form a first stepped surface. When the first connector is connected to the test cover, the first stepped surface is in contact with the first sidewall of the test cover facing the first connector.

5. The exhaust device as described in claim 4, characterized in that, A sealing ring is provided between the first sidewall and the first stepped surface.

6. The exhaust device as claimed in claim 1, characterized in that, The first connector includes a first through hole and a second through hole, the first through hole extending along a first direction and the second through hole extending along a second direction. The first through hole penetrates the first connector, and the first opening and the second opening are two openings of the first through hole along the first direction; The third opening is one opening of the second through hole along the second direction, and the other opening of the second through hole along the second direction is connected to the first through hole; The angle between the first direction and the second direction is greater than or equal to 15° and less than or equal to 60°.

7. The exhaust device as described in claim 4, characterized in that, The first connector further includes a fixed section, and the first external thread section, the intermediate section and the fixed section are connected in sequence along the length direction of the first connector; The intermediate section and the fixed section form two second stepped surfaces that are opposite each other along a third direction, which is perpendicular to the length direction of the first joint.

8. The exhaust device as described in claim 7, characterized in that, The second opening and the third opening are formed in the fixed section.

9. The exhaust device as claimed in claim 1, characterized in that, The second connector is threadedly connected to the third open end, and the second connector is connected to the first end of the exhaust pipe.

10. The exhaust device as claimed in claim 9, characterized in that, Along the height direction of the heat exchanger, the distance between the second end of the exhaust pipe and the highest inner wall in the exhaust chamber is less than a preset value.

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

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

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