Air tightness detection equipment for heat exchange tube
By designing an airtightness detection device for heat exchange pipes, the first and second joints that are matched by springs and top rings, combined with positioning plates and positioning grooves, the problem of poor sealing of heat exchange pipes of different lengths is solved, and the problem of poor sealing of heat exchange pipes of different lengths is achieved. Efficient and accurate airtightness detection.
Patent Information
- Application Number
- CN202411579998.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2024-12-31
AI Technical Summary
Existing heat exchange pipe airtightness detection equipment cannot effectively handle heat exchange pipes of different lengths, resulting in poor sealing, which may cause false detection and refrigerant leakage.
An airtightness detection device including a water tank, a lifting assembly, an adjustment assembly, a first interface assembly and a second interface assembly are designed. The seal is realized by extruding the spring and top ring of the first joint and the second joint. , set the positioning plate and positioning slot to automatically align and avoid wear.
Effective sealing detection of heat exchange pipes of different lengths is achieved, operation is simplified, misinspection is avoided, and the surface of heat exchange pipes is protected, ensuring the accuracy and safety of the inspection.
Smart Images
Figure CN119223537A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of heat exchange tube detection, and in particular to an air tightness detection device for heat exchange tubes. Background Art
[0002] Heat exchange tubes are made by rolling with a roller, so it is inevitable that they will be closed and damaged. Therefore, after production, they need to be tested for air tightness. If the heat exchange tubes that have not been tested are put into use directly, there may be cracks in the pipes and refrigerant leakage. However, in order to improve efficiency, multiple tubes are usually checked, but the length of each heat exchange tube is different. With the existing joints, it is impossible to ensure that each heat exchange tube is completely sealed with the joint, which may cause false detection. Summary of the invention
[0003] In view of the defects of the above prior art, the main purpose of the present invention is to overcome the shortcomings of the prior art, and discloses an air tightness detection device for a heat exchange tube, comprising a water tank, a group of lifting components, an adjustment component, a first interface component and a second interface component, one of the lifting components is fixed at one end in the water tank, the other lifting component is arranged at the other end in the water tank through the adjustment component, the first interface component and the second interface component are respectively arranged on the lifting components, the two ends of the heat exchange tube are respectively connected to the first interface component and the second interface component, and the first interface component and / or the second interface component are connected to an air source;
[0004] The first interface component includes a fixed seat component and at least one first connector; the second interface component includes the fixed seat component and at least one second connector; the first connectors and the second connectors correspond in number.
[0005] Furthermore, the lifting assembly includes a guide bracket, a first cylinder and a lifting plate, the lifting plate is slidably arranged on the guide bracket, the first interface assembly is arranged on the lifting plate, the first cylinder is arranged on the guide bracket, and the first cylinder is connected to the lifting plate.
[0006] Furthermore, the adjusting assembly includes a first guide rod, a second cylinder, an adjusting plate, a fixed plate, a screw and a handwheel, the first guide rod is arranged in parallel on both sides of the water tank, the fixed plate is arranged at one end of the water tank, a lifting assembly and the adjusting plate are horizontally slidably arranged on the first guide rod, the screw rod is arranged parallel to the first guide rod, the screw rod is threadedly matched with the fixed plate, the two ends of the screw rod are respectively connected to the adjusting plate and the handwheel, the second cylinder is arranged on the adjusting plate, and the second cylinder is connected to the lifting assembly.
[0007] Further, the fixed seat assembly includes a fixed bracket, a third cylinder and a traction plate, the fixed bracket is provided with a first connecting hole that cooperates with the first joint and the second joint, the third cylinder is arranged on the fixed bracket, the piston rod of the third cylinder is connected to the traction plate, the traction plate is provided with a second connecting hole that cooperates with the first joint and the second joint, and the first joint and the second joint are controlled by the third cylinder through the traction plate.
[0008] Further, the first joint includes a first body, a top ring, a spring, a first sealing ring and a first pull rod, the first body is axially penetrated by a first guide portion and a first accommodating chamber, a first fixing portion is axially protruded in the first accommodating chamber; the top ring is arranged in the first accommodating chamber through the spring, and the top ring is sleeved on the first fixing portion, the first pull rod is slidably arranged on the first guide portion, a first clamping portion is radially protruded at one end of the first pull rod, the sealing ring is sleeved on the first pull rod, and the sealing ring is located between the first fixing portion and the first clamping portion; an axially through-going air inlet is arranged on the pull rod.
[0009] Furthermore, an external thread is arranged on the outside of the first body.
[0010] Furthermore, at least two nuts are disposed on the first pull rod, and the nuts are threadably matched with the outer wall of the first pull rod.
[0011] Furthermore, the second joint includes a second body, a second sealing ring and a second pull rod, the second body is axially penetrated by a second guide portion and a second accommodating chamber, a second fixing portion is axially protruded in the second accommodating chamber; the second pull rod is slidably arranged on the second guide portion, a second clamping portion is radially protruded at one end of the second pull rod, the sealing ring is sleeved on the second pull rod, and the sealing ring is located between the second fixing portion and the second clamping portion.
[0012] Furthermore, a positioning plate is provided on the fixing bracket, and a positioning groove is concavely provided on the surface of the positioning plate, and the positioning groove corresponds to the first joint and the second joint.
[0013] Furthermore, rounded corners are provided between adjacent positioning grooves.
[0014] Beneficial effects achieved by the present invention:
[0015] The present invention overcomes the detection of heat exchange tubes of different lengths by setting the first joint and the second joint, and adopting the cooperation of the spring and the top ring. The sealing ring is deformed toward the outer shape by the cooperation of the fixing part and the pressing part, and the sealing with the heat exchange tube is realized by extrusion, which has a simple structure and convenient operation. A positioning plate is provided, and a positioning groove is provided on the positioning plate, and the edge of the positioning groove is provided with a rounded corner to ensure that the heat exchange tube is automatically aligned with the first joint and the second joint, and at the same time avoid the wear of the surface of the heat exchange tube caused by the edges and corners. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of an air tightness detection device for heat exchange tubes of the present invention;
[0017] Figure 2 It is a schematic diagram of the cooperation between the lifting assembly and the first interface assembly;
[0018] Figure 3 A schematic diagram of the structure of the cooperation between the lifting component, the adjustment component and the second interface component;
[0019] Figure 4 It is a schematic diagram of the combination of the fixing seat assembly and the first joint;
[0020] Figure 5 for Figure 4 A schematic diagram of a first joint assembly structure is hidden in the figure;
[0021] Figure 6 is a schematic diagram of the three-dimensional structure of the first joint;
[0022] Figure 7 is a schematic diagram of the internal structure of the first joint;
[0023] Figure 8 is a schematic diagram of the three-dimensional structure of the second joint;
[0024] Fig. 9 is a schematic diagram of the internal structure of the second joint;
[0025] Fig.10 It is a schematic diagram of the cooperation between the heat exchange tube and the first joint and the second joint;
[0026] The reference numerals are as follows:
[0027] 1. water tank, 2. lifting assembly, 3. adjusting assembly, 4. first interface assembly, 5. second interface assembly, 6. fixing seat assembly, 9. heat exchange tube, 21. guide bracket, 22. first cylinder, 23. lifting plate, 31. first guide rod, 32. second cylinder, 33. adjusting plate, 34. fixing plate, 35. screw rod, 36. hand wheel, 41. first joint, 411. first body, 412. top ring, 413. spring, 414. first sealing ring, 415. first pull rod, 411. first guide part, 4 112, first accommodating chamber, 4113, first fixing portion, 4151, first pressing portion, 4152, air inlet, 51, second joint, 511, second body, 512, second sealing ring, 513, second pull rod, 5111, second guide portion, 5112, second accommodating chamber, 5113, second fixing portion, 5131, second pressing portion, 61, fixing bracket, 62, third cylinder, 63, traction plate, 64, positioning plate, 611, first connecting hole, 631, second connecting hole, 641, positioning groove. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0029] A gas tightness detection device for heat exchange tube 9, such as Figure 1-Figure 10 As shown, it includes a water tank 1, a group of lifting components 2, an adjustment component 3, a first interface component 4 and a second interface component 5. One lifting component 2 is fixed at one end in the water tank 1, and the other lifting component 2 is arranged at the other end in the water tank 1 through the adjustment component 3. The first interface component 4 and the second interface component 5 are respectively arranged on the lifting component 2; the first interface component 4 and / or the second interface component 5 are connected to the gas source; during detection, the two ends of the heat exchange tube 9 are respectively connected to the first interface component 4 and the second interface component 5. Specifically, the two ends of the heat exchange tube 9 are first supported on the first interface component 4 and the second interface component 5, and the second interface component 5 is controlled to move toward the first interface component 4 by the adjustment component 3. In this process, the two ends of the heat exchange tube 9 are inserted into the first interface component 4 and the second interface component 5 to achieve sealing. Then, the heat exchange tube 9 is immersed in the water of the water tank through the lifting component 2, and the gas source is filled into the heat exchange tube 9. The bubbles in the water are observed to determine whether there is leakage. Among them, the gas source can be connected only to the first interface component 4 or the second interface component 5, and of course, it can also be connected to the first interface component 4 and the second interface component 5 at the same time.
[0030] The first interface assembly 4 includes a fixed seat assembly 6 and at least one first joint 41; the second interface assembly 5 includes a fixed seat assembly 6 and at least one second joint 51; the number of the first joints 41 and the second joints 51 corresponds. The first joints 41 and the second joints 51 are respectively connected to the two ends of the heat exchange tube 9. The number of the first joints 41 and the second joints 51 is set according to actual needs. In this embodiment, 6 first joints 41 and 6 second joints 51 are respectively set. The first joints 41 and the second joints 51 are sealed and connected to the two ends of the heat exchange tube 9.
[0031] In one embodiment, if Figure 1-Figure 10 As shown, the lifting assembly 2 includes a guide bracket 21, a first cylinder 22 and a lifting plate 23. The lifting plate 23 is slidably arranged on the guide bracket 21, and the lifting plate 23 is guided to move vertically by the guide bracket 21. The first interface assembly 4 is arranged on the lifting plate 23, the first cylinder 22 is arranged on the guide bracket 21, the piston rod of the first cylinder 22 is connected to the lifting plate 23, and the lifting plate 23 is driven to move up and down by the first cylinder 22. Then the heat exchange tube 9 is controlled to be immersed in the water of the water tank 1. Among them, the guide bracket 21 includes an upper bracket, a lower bracket and two guide rods, the upper bracket and the lower bracket are arranged in parallel up and down, and the two guide rods are arranged vertically and in parallel between the upper bracket and the lower bracket.
[0032] In one embodiment, if Figure 1-Figure 10 As shown, the adjustment assembly 3 includes a first guide rod 31, a second cylinder 32, an adjustment plate 33, a fixed plate 34, a screw rod 35 and a hand wheel 36. The first guide rod 31 is arranged in parallel on both sides of the water tank 1, and the fixed plate 34 is arranged at one end of the water tank 1. A lifting assembly 2 and an adjustment plate 33 are arranged horizontally and slidably on the first guide rod 31. The screw rod 35 is arranged in parallel with the first guide rod 31. The screw rod 35 is threadedly matched with the fixed plate 34. The two ends of the screw rod 35 are respectively connected to the adjustment plate 33 and the hand wheel 36. When in use, the screw rod 35 is driven to rotate by the hand wheel 36, thereby controlling the adjustment plate 33 to move horizontally along the first guide rod 31. Among them, one end of the screw rod 35 is rotatably connected to the adjustment plate 33. The second cylinder 32 is arranged on the adjustment plate 33, and the second cylinder 32 is connected to the lifting assembly 2, thereby controlling the second interface assembly 5 to move horizontally.
[0033] In one embodiment, if Figure 1-Figure 10As shown, the fixing seat assembly 6 includes a fixing bracket 61, a third cylinder 62 and a traction plate 63. The fixing bracket 61 is provided with a first connection hole 611 that matches with the first joint 41 and the second joint 51. The first connection hole 611 is a threaded hole or a light hole. When the first connection hole 611 is a threaded hole, the outer walls of the first joint 41 and the second joint 51 are provided with matching external threads. When the first connection hole 611 is a light hole, nuts are provided on the first joint 41 and the second joint 51, and the first joint 41 and the second joint 51 are fixed to the fixing bracket 61 by the nuts. The third cylinder 62 is provided on the fixing bracket 61, and the piston rod of the third cylinder 62 is connected to the traction plate 63. The traction plate 63 is provided with a second connection hole 631 that matches with the first joint 41 and the second joint 51, and the first joint 41 and the second joint 51 are controlled by the third cylinder 62 through the traction plate 63.
[0034] In one embodiment, if Figure 1-Figure 10 As shown, the first joint 41 includes a first body 411, a top ring 412, a spring 413, a first sealing ring 414 and a first pull rod 415. The first body 411 is axially penetrated by a first guide portion 4111 and a first accommodating chamber 4112, and a first fixing portion 4113 is axially protruded in the first accommodating chamber 4112; the top ring 412 is arranged in the first accommodating chamber 4112 through the spring 413, and the top ring 412 is sleeved on the first fixing portion 4113, the first pull rod 415 is slidably arranged on the first guide portion 4111, a first clamping portion 4151 is radially protruded at one end of the first pull rod 415, the sealing ring 414 is sleeved on the first pull rod 415, and the sealing ring 414 is located between the first fixing portion 4113 and the first clamping portion 4151; the pull rod 415 is axially provided with an air inlet 4152 that passes through. When in use, the second interface component 5 pushes the heat exchange tube 9 to move toward the first interface component 4, the heat exchange tube 9 is immersed in the first accommodating cavity 4112, and then the end of the heat exchange tube 9 contacts the top ring 412, the spring 413 is compressed by the thrust and reacts on the heat exchange tube 9 to ensure that the other end of the heat exchange tube 9 is always tightly pressed against the second interface component 5, thereby coping with the situation where multiple heat exchange tubes 9 have different lengths at the same time.
[0035] In the above embodiment, if Figure 1-Figure 10 As shown, a rounded corner is provided at the end of the first accommodating chamber 4112 of the first body 411 to increase the opening size, and the rounded corner is used to guide the heat exchange tube 9 into the first accommodating chamber 4112 .
[0036] In the above embodiment, if Figure 1-Figure 10 As shown, the first body 411 is provided with external threads. When the first connecting hole 611 is a threaded hole, it is convenient to connect and fix the first body 411 with the first connecting hole 611.
[0037] In the above embodiment, if Figure 1-Figure 10As shown, at least two nuts are provided on the first pull rod 415, and the nuts are threadedly matched with the outer wall of the first pull rod 415. Specifically, the second connection hole 631 is a light hole. When the first pull rod 415 is connected to the second connection hole 631, a nut is first installed on the first pull rod 415, and then one end of the first pull rod 415 is passed through the second connection hole 631, and then another nut is installed. At this time, the two nuts are located on both sides of the traction plate 63. The first pull rod 415 is fixed to the traction plate 63 by the two nuts.
[0038] In one embodiment, if Figure 1-Figure 10 As shown, the second joint 51 includes a second body 511, a second sealing ring 512 and a second pull rod 513. The second body 511 is axially penetrated by a second guide portion 5111 and a second accommodating chamber 5112, and a second fixing portion 5113 is axially protruded in the second accommodating chamber 5112; the second pull rod 513 is slidably arranged on the second guide portion 5111, and a second clamping portion 5131 is radially protruded at one end of the second pull rod 513. The sealing ring 512 is sleeved on the second pull rod 513, and the sealing ring 512 is located between the second fixing portion 5113 and the second clamping portion 5131. When in use, the second body 511 is fixedly arranged on the fixed bracket 61, and the second pull rod 513 is connected to the traction plate 63. When the heat exchange tube 9 is inserted into the second accommodating cavity 5112 of the second body 511, the traction plate 63 is driven to move by the third cylinder 62, thereby squeezing the second sealing ring 512 and deforming it into an outer shape, so that the second sealing ring is tightly attached to the inner wall of the heat exchange tube 9, thereby realizing a sealed connection between the second joint 51 and the heat exchange tube 9.
[0039] When the first connection hole 611 has an internal thread, the outer wall of the second body 511 can be provided with an external thread that matches the internal thread, and then the second body 511 can be fixed to the fixing bracket 61 by rotating it. In addition, when the first connection hole 611 is a smooth hole, a nut is provided on the second body 511, and the nut cooperates with the second body 511 to clamp the second body 511 on the fixing bracket 61.
[0040] In addition, at least two nuts are provided on the second tie rod 513, and the nuts are threadedly matched with the outer wall of the second tie rod 513. Specifically, the second connection hole 631 is a light hole. When the second tie rod 513 is connected to the second connection hole 631, a nut is first installed on the second tie rod 513, and then one end of the second tie rod 415 is passed through the second connection hole 631, and then another nut is installed. At this time, the two nuts are located on both sides of the traction plate 63. The second tie rod 513 is fixed to the traction plate 63 by the two nuts.
[0041] In the above embodiment, if Figure 1-Figure 10 As shown, a rounded corner is provided at the end of the first accommodating chamber 4112 of the second body 511 to increase the opening size, and the rounded corner is used to guide the heat exchange tube 9 into the first accommodating chamber 4112 .
[0042] In the above embodiment, if Figure 1-Figure 10 As shown, the second pull rod 513 may be provided with an axially connected air inlet for connecting to an air source. Of course, the second pull rod 513 may also not be provided with an air inlet, and gas may be introduced only through the air inlet 4152 of the first pull rod 415.
[0043] In one embodiment, if Figure 1-Figure 10 As shown, a positioning plate 64 is provided on the fixing bracket 61, and a positioning groove 641 is concavely provided on the surface of the positioning plate 64, and the positioning groove 641 corresponds to the first joint 41 and the second joint 51. The heat exchange tube 9 is positioned by the positioning plate 64, and the height position of the heat exchange tube 9 is adjusted to correspond to the first joint 41 and the second joint 51.
[0044] In the above embodiment, if Figure 1-Figure 10 As shown, fillets are provided between adjacent positioning grooves 641 to prevent the edges from causing wear on the surface of the heat exchange tube 9 and to guide the heat exchange tube 9 into the positioning groove 641 through the fillets.
[0045] When the present invention is used, Figure 1-Figure 10 As shown, according to the length of the heat exchange tube 9 to be tested, the hand wheel 36 drives the screw rod 35 to adjust the horizontal position of the adjustment plate 33, and then adjust the horizontal position of the second interface component 5, that is, the distance between the first interface component 4 and the second interface component 5. Then, the two ends of the heat exchange tube 9 are placed on the positioning plates 64 on the first interface component 4 and the second interface component 5, and the heat exchange tube 9 is arranged in the positioning groove 641, and then the equipment is started, and the second interface component 5 is controlled by the second cylinder 32 to continue to move toward the first interface component 4, so as to push the heat exchange tube 9 into the first joint 4 and the second joint 5. The second joint 5 does not have a top ring, and the heat exchange tube 9 is pushed by the spring 413, so that the other end of the heat exchange tube 9 is completely inserted into the second body 51. The top ring 412 and the thrust of the spring 413 are used to compensate for the different lengths of the heat exchange tube 9 caused by the processing error. Then, the third cylinder 62 drives the traction plate 63 to pull the first pull rod 415 and the second pull rod 513, and the first sealing ring 414 and the second sealing ring 512 are squeezed to change shape and press against the inner wall of the heat exchange tube 9, so as to achieve the sealing of the first joint 4, the second joint 5 and the heat exchange tube 9. After the connection is completed, the lifting plate 23 is controlled to descend by the first cylinder 22 to immerse the heat exchange tube 9 in the water in the water tank 1, and the air source is introduced through the first pull rod 415 and / or the second pull rod 513. If the heat exchange tube 9 is cracked or damaged, bubbles will emerge at the corresponding position. Then the air tightness test is completed.
[0046] The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, they should all be included in the protection scope of the claims of the present invention.
Claims
1. An air tightness detection device for heat exchange tubes, characterized in that: It comprises a water tank, a group of lifting components, an adjusting component, a first interface component and a second interface component, wherein one of the lifting components is fixed at one end in the water tank, and the other lifting component is arranged at the other end in the water tank through the adjusting component, the first interface component and the second interface component are respectively arranged on the lifting components, the two ends of the heat exchange tube are respectively connected to the first interface component and the second interface component, and the first interface component and / or the second interface component are connected to an air source; The first interface component includes a fixed seat component and at least one first connector; the second interface component includes the fixed seat component and at least one second connector; the first connectors and the second connectors correspond in number.
2. The air tightness detection device for heat exchange tubes according to claim 1, characterized in that: The lifting assembly includes a guide bracket, a first cylinder and a lifting plate, the lifting plate is slidably arranged on the guide bracket, the first interface assembly is arranged on the lifting plate, the first cylinder is arranged on the guide bracket, and the first cylinder is connected to the lifting plate.
3. The air tightness detection device for heat exchange tubes according to claim 1, characterized in that: The adjusting assembly includes a first guide rod, a second cylinder, an adjusting plate, a fixing plate, a screw and a hand wheel. The first guide rod is arranged in parallel on both sides of the water tank. The fixing plate is arranged at one end of the water tank. A lifting assembly and the adjusting plate are horizontally slidably arranged on the first guide rod. The screw is arranged in parallel with the first guide rod. The screw is threadedly matched with the fixing plate. The two ends of the screw are respectively connected to the adjusting plate and the hand wheel. The second cylinder is arranged on the adjusting plate. The second cylinder is connected to the lifting assembly.
4. The air tightness detection device for heat exchange tubes according to claim 1, characterized in that: The fixed seat assembly includes a fixed bracket, a third cylinder and a traction plate. The fixed bracket is provided with a first connecting hole that cooperates with the first joint and the second joint. The third cylinder is arranged on the fixed bracket. The piston rod of the third cylinder is connected to the traction plate. The traction plate is provided with a second connecting hole that cooperates with the first joint and the second joint. The first joint and the second joint are controlled by the third cylinder through the traction plate.
5. The air tightness detection device for heat exchange tubes according to claim 1, characterized in that: The first joint includes a first body, a top ring, a spring, a first sealing ring and a first pull rod. The first body is axially penetrated by a first guide portion and a first accommodating chamber, and a first fixing portion is axially protruded in the first accommodating chamber; the top ring is arranged in the first accommodating chamber through the spring, and the top ring is sleeved on the first fixing portion, the first pull rod is slidably arranged on the first guide portion, a first clamping portion is radially protruded at one end of the first pull rod, the sealing ring is sleeved on the first pull rod, and the sealing ring is located between the first fixing portion and the first clamping portion; an air inlet is axially penetrated on the pull rod.
6. The air tightness detection device for heat exchange tubes according to claim 5, characterized in that: The first body is provided with external threads.
7. The air tightness detection device for heat exchange tubes according to claim 5, characterized in that: At least two nuts are arranged on the first pull rod, and the nuts are threadably matched with the outer wall of the first pull rod.
8. The air tightness detection device for heat exchange tubes according to claim 1, characterized in that: The second joint includes a second body, a second sealing ring and a second pull rod. The second body is axially penetrated by a second guide portion and a second accommodating chamber, and a second fixing portion is axially protruded in the second accommodating chamber. The second pull rod is slidably arranged on the second guide portion, and a second clamping portion is radially protruded at one end of the second pull rod. The sealing ring is sleeved on the second pull rod, and the sealing ring is located between the second fixing portion and the second clamping portion.
9. The air tightness detection device for heat exchange tubes according to claim 4, characterized in that: A positioning plate is arranged on the fixing bracket, and a positioning groove is concavely arranged on the surface of the positioning plate, and the positioning groove corresponds to the first joint and the second joint.
10. The air tightness detection device for heat exchange tubes according to claim 9, characterized in that: Rounded corners are arranged between adjacent positioning grooves.