Energy-saving plate-fin heat exchanger and air tightness detection device thereof

Abstract

The application provides an energy-saving plate-fin heat exchanger, which comprises a heat exchanger assembly, the heat exchanger assembly comprises a shell, a conveying pipe group and a fin group, a separation cavity is further arranged on the side wall of the shell, an interface is arranged on the outer convex of the separation cavity and is used for being connected with a communication assembly, and a convex rib is arranged on the inner wall of the outer convex interface; and the air tightness detection device of the energy-saving plate-fin heat exchanger comprises a rack assembly and a fixing frame, a liftable detection assembly is installed on the fixing frame, and a stabilizing assembly is arranged on the detection assembly; the application is connected with the heat exchanger through the communication assembly, convenient communication is realized during conveying of medium, the pipeline is connected with the communication pipe, a sealing structure is arranged at the connecting structure to realize close connection, the close performance of connection is ensured, the heat exchanger is placed and conveyed on the rack, the connection with the communication pipe is realized, air tightness detection is realized through the filled gas, and the stabilizing assembly is used for realizing stable limiting, and the detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to an energy-saving plate-fin heat exchanger and its airtightness testing device, belonging to the technical field of plate heat exchangers. Background Technology

[0002] Energy-saving plate-fin heat exchangers are highly efficient and compact heat exchange devices. Their core principle involves increasing the heat transfer area through a multi-layered thin plate (fin) structure, while utilizing fluid flow between the fins to achieve heat exchange. They are composed of multiple layers of stacked metal plates (such as aluminum or stainless steel), with corrugated fins welded or brazed between the plates to form fluid channels. The fins both enhance heat transfer and provide support. Hot and cold fluids flow counter-currently or cross-currently through alternating flow channels, avoiding direct mixing and improving heat exchange efficiency. Heat is transferred from the high-temperature fluid to the low-temperature fluid through the plates. The fins significantly increase the heat transfer area and enhance disturbance through turbulence, reducing thermal resistance. Key energy-saving features include a compact design (heat transfer area per unit volume can reach 2000 m² / m³) and a high-efficiency heat transfer coefficient, significantly reducing energy consumption.

[0003] Plate heat exchangers are devices that achieve heat conversion efficiency through fins. The fin structure makes the heat exchange efficiency 3 to 5 times higher than that of shell and tube heat exchangers. However, the internal pressure increases when the medium flows inside, which can easily lead to leakage problems at the joints, affecting the performance of the plate heat exchanger. In addition, plate heat exchangers are welded, and during production, manufacturing errors may occur, leading to subsequent medium leakage. Therefore, airtightness testing is required. However, the testing operation is not easy to perform quickly during mass production, which affects the testing efficiency of plate heat exchangers. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, the present invention provides an energy-saving plate-fin heat exchanger and its airtightness testing device.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0006] This invention provides an energy-saving plate-fin heat exchanger, including a heat exchanger assembly. The heat exchanger assembly includes a shell, a conveying pipe assembly, and a fin assembly. The shell is fixedly connected to multiple conveying pipe assemblies, and the fin assembly is welded and fixed to the inside of the shell. The shell sidewall is further provided with a separation cavity. The separation cavity has an outwardly protruding interface for connecting with a connecting component, and the inner wall of the outwardly protruding interface is provided with a rib.

[0007] The connecting component includes a connecting pipe, which is internally fitted and inserted into the protruding interface. The end face of the connecting pipe is provided with a sealing ring, and the sealing ring is fitted and connected to the protruding rib. A washer is fixedly connected to the surface of the connecting pipe, and the washer is fitted and connected to the edge of the protruding interface. A threaded sleeve is movably sleeved on the surface of the connecting pipe, and the threaded sleeve is threadedly connected to the protruding interface.

[0008] In this technical solution, the shell is a square hollow structure. The shell is formed by welding multiple metal plates together. The shell has multiple chambers on its side. The shell at the chamber is welded and fixed with a cover. The fin assembly is made by welding multiple corrugated and straight aluminum plates together. The medium flow channel formed by the fin assembly is connected to the conveying pipe assembly.

[0009] An airtightness testing device for an energy-saving plate-fin heat exchanger includes a frame assembly, which consists of a conveying mechanism and a fixing mechanism. The fixing mechanism is located above the conveying mechanism. The fixing mechanism includes a fixing frame, on which a liftable testing component is mounted. The testing component is provided with a stabilizing component for limiting the movement of the component. A fixing component is fixedly installed on the top of the fixing frame. The fixing component is located on one side of the testing component for clamping and fixing the heat exchanger assembly.

[0010] The detection assembly includes a fixed plate and a connecting plate. The connecting plate is fixedly installed to the bottom of the fixed plate. A fixed shaft is welded and fixed on the connecting plate, and a sliding sleeve is rotatably connected inside the fixed shaft. A connecting tube that can rotate relative to the fixed shaft is provided inside the sliding sleeve. The end of the connecting tube is fixedly connected to the sliding sleeve for threaded connection with the end of the connecting tube. Two connecting tubes are provided on the connecting plate for connection to an air pump and a pressure gauge, respectively.

[0011] The stabilizing component includes a rotating plate and a crossbar. The rotating plate is rotatably connected to the bottom surface of the connecting plate. A crossbar is fixedly connected to the end of the rotating plate, and the crossbar is arranged on both sides of the connecting pipe for clamping and fixing the connecting pipe. A limit mechanism is fixedly installed on the crossbar.

[0012] In this technical solution, the conveying mechanism includes a support frame, two conveying shafts are rotatably connected to the top of the support frame, the conveying shafts are connected by a conveyor belt, and multiple support rollers are evenly arranged on the support frame, with each support roller in contact with the conveyor belt.

[0013] In this technical solution, the fixing mechanism includes a fixing frame, the top of the fixing frame has an elongated hole, a sliding plate is slidably connected to the top surface of the fixing frame, a first hydraulic cylinder is fixedly installed on the sliding plate, the telescopic end of the first hydraulic cylinder is fixedly connected to the fixing plate, a T-shaped slide block is fixedly connected to the bottom of the sliding plate, both ends of the slide block have threaded holes connected to the lead screw, and the first hydraulic cylinder and the sliding plate are both located inside the elongated hole.

[0014] In this technical solution, the fixing plate has a U-shaped structure and is fixedly connected to the air pump and pressure gauge respectively. The air pump and pressure gauge are both fixedly connected to the fixing pipe, and the fixing pipe is rotatably and sealed to the connecting pipe. The surface of the connecting pipe is provided with a plurality of evenly distributed second protrusions, which are located inside the sliding sleeve. The inner wall of the sliding sleeve is provided with a plurality of evenly distributed first protrusions, and the first and second protrusions are staggered to drive the connecting pipe to rotate synchronously through the sliding sleeve. The end of the connecting pipe is fixedly connected with a limit rib.

[0015] In this technical solution, a motor is fixedly installed on the connecting plate, the output end of the motor is fixedly connected to a gear, the gear rotates with both ends of the connecting plate, the gear is set on one side of the sliding sleeve and sleeved on the surface of the connecting pipe, a gear ring is fixedly connected to the edge of the sliding sleeve, and the gear meshes with the gear ring, and the end of the connecting pipe is provided with an end head, and the end head is rotatably connected to the inside of the fixed pipe.

[0016] In this technical solution, there are four rotating plates, which are evenly distributed around the connecting plate. The ends of every two rotating plates are fixedly connected to the two ends of the crossbars. The adjacent ends of each crossbar are fixedly connected to the limiting blocks. The limiting blocks on the same side correspond to each other, and the limiting blocks have an arc surface that contacts the connecting pipe. The rotating plates are fixedly connected to the two ends of the horizontal shaft. A sleeve is rotatably connected to the horizontal shaft. There are two horizontal shafts. A second cylinder is provided between the two horizontal shafts. The second cylinder is a bidirectional cylinder, and both telescopic shafts of the second cylinder are fixedly connected to the sleeve.

[0017] In this technical solution, the fixing component includes a second hydraulic cylinder, a limiting plate, and a clamping plate. The second hydraulic cylinder is fixedly installed on the top of the fixing frame and is located on one side of the detection component. The telescopic end of the second hydraulic cylinder is fixedly connected to the U-shaped limiting plate, and two symmetrically distributed clamping plates are rotatably connected inside the limiting plate. The two clamping plates are symmetrically arranged on both sides of the housing, and a connecting piece is fixedly connected to the outer wall of each clamping plate. A third hydraulic cylinder is fixedly installed on the outer walls of both sides of the limiting plate. The telescopic end of the third hydraulic cylinder passes through the limiting plate and is movably connected to the connecting piece. A pin located inside the connecting piece is fixedly connected to the telescopic end of the third hydraulic cylinder, and the pin is located in an elongated shaft hole opened in the connecting piece for stable rotation of the clamping plate.

[0018] In this technical solution, the limiting mechanism includes a fixing block and a first cylinder. The fixing block is fixedly installed on the side wall of the crossbar. The fixing blocks are staggered on the two side walls of the crossbar. Each fixing block is fixedly connected to the first cylinder. The telescopic end of the first cylinder is fixedly connected to the support block. The support block is in contact with the surface of the connecting pipe. The support block and the limiting block are located on both sides of the connecting pipe.

[0019] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0020] The positive and progressive effects of this invention are as follows:

[0021] The aforementioned energy-saving plate-fin heat exchanger and its airtightness testing device utilize a connecting component to connect to the heat exchanger, enabling convenient connection during medium transport. This facilitates the connection of pipes to the connecting pipe, and a sealing structure at the connection point ensures a tight fit. The heat exchanger is placed and transported on a frame, and the testing component connects to the connecting pipe. Airtightness testing is performed using inflated gas, and a stabilizing component provides stable positioning during connection, ensuring accurate alignment between the testing component and the connecting pipe. A movable sliding plate allows for position adjustment, and a fixing component secures the heat exchanger, enabling simultaneous testing of multiple heat exchangers while ensuring accurate alignment of the testing interfaces, thus improving operational efficiency. Airtightness is determined by observing pressure relief, effectively improving testing efficiency and eliminating the need for manual testing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the half-section structure of the present invention.

[0024] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0025] Figure 4 This is a partially enlarged structural diagram of the detection component of the present invention.

[0026] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at point B in the middle.

[0027] Figure 6 This is a partial three-dimensional structural diagram of the stabilizing component of the present invention.

[0028] Figure 7This is a schematic diagram of the overall three-dimensional structure of the heat exchanger assembly of the present invention.

[0029] Figure 8 This is a schematic diagram of a partial three-dimensional structure of the separation cavity in this invention.

[0030] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at point C.

[0031] Figure 10 This is a schematic diagram of a partial three-dimensional structure of the sliding sleeve of the present invention.

[0032] Figure 11 This is a partial three-dimensional structural diagram of the fixing component of the present invention.

[0033] Explanation of reference numerals in the attached figures

[0034] 100. Frame assembly; 101. Support frame; 102. Conveyor shaft; 103. Conveyor belt; 104. Support roller; 105. Fixing frame; 106. Elongated hole; 107. Slide plate; 108. First hydraulic cylinder; 109. Slide block;

[0035] 200. Detection component; 201. Fixing plate; 202. Connecting plate; 203. Air pump; 204. Pressure gauge; 205. Fixing pipe; 206. Fixing shaft; 207. Sliding sleeve; 208. Gear ring; 209. First protrusion; 210. Connecting pipe; 211. Second protrusion; 212. End; 213. Limiting rib; 214. Rotating sleeve; 215. Motor; 216. Gear;

[0036] 300. Connecting component; 301. Connecting pipe; 302. Sealing ring; 303. Washer; 304. Threaded sleeve;

[0037] 400. Stabilizing component; 401. Turning plate; 402. Crossbar; 403. Limiting block; 404. Fixing block; 405. First cylinder; 406. Support block; 407. Horizontal shaft; 408. Second cylinder;

[0038] 500. Heat exchanger assembly; 501. Shell; 502. Delivery pipe assembly; 503. Separation chamber; 504. Rib; 505. Fin assembly; 506. Cover;

[0039] 600. Fixing component; 601. Second hydraulic cylinder; 602. Limiting plate; 603. Third hydraulic cylinder; 604. Clamping plate; 605. Connecting component. Detailed Implementation

[0040] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0041] like Figure 1-11 As shown, the energy-saving plate-fin heat exchanger includes a heat exchanger assembly 500, which includes a shell 501, a conveying pipe assembly 502, and a fin assembly 505. The shell 501 is fixedly connected to multiple conveying pipe assemblies 502, and the fin assembly 505 is welded and fixed to the inside of the shell 501. The shell 501 is characterized in that a separation cavity 503 is also provided on the side wall of the shell 501. The separation cavity 503 has an outwardly protruding interface for connecting with a connecting component 300, and the inner wall of the outwardly protruding interface is provided with a rib 504.

[0042] In this technical solution, a fin assembly 505 is provided inside the housing 501 to form multiple gaps for medium flow, and heat exchange is achieved through heat exchange. A separation chamber 503 is provided to separate the gas and liquid of the introduced gas to ensure smooth flow of the medium. The separation chamber 503 is connected to the connecting pipe 301 through an interface, and the connecting pipe 210 is provided with a rib 504 to cooperate with the connecting pipe 301 to achieve a tight seal.

[0043] The connecting component 300 includes a connecting pipe 301, which is internally fitted and inserted into the protruding interface. A sealing ring 302 is provided on the end face of the connecting pipe 301, and the sealing ring 302 is fitted and connected to the protruding rib 504. A washer 303 is fixedly connected to the surface of the connecting pipe 301, and the washer 303 is fitted and connected to the edge of the protruding interface. A threaded sleeve 304 is movably sleeved on the surface of the connecting pipe 301, and the threaded sleeve 304 is threadedly connected to the protruding interface. The housing 501 is a square hollow structure, which is formed by welding multiple metal plates together. Multiple chambers are provided on the side of the housing 501. A cover 506 is welded and fixed to the housing 501 at the chamber. The fin assembly 505 is made of multiple corrugated and straight aluminum plates welded alternately. The medium flow channel formed by the fin assembly 505 is connected to the conveying pipe assembly 502.

[0044] In this technical solution, the connecting pipe 301 can be connected to the housing 501 to achieve connection. In subsequent use, the other end of the connecting pipe 301 is connected to the pipeline to achieve effective connection. When the connecting pipe 301 is inserted into the interface, the sealing ring 302 and the rib 504 can fit tightly together, and at the same time, the washer 303 is driven to fit against the edge of the interface to achieve sealing. When the screw sleeve 304 is tightened, the sealing ring 302 and the washer 303 are pressed and fixed simultaneously. While fixing the connecting pipe 301, the sealing performance can be effectively improved, and leakage problems at the interface caused by excessive pressure inside the housing 501 can be avoided. At the same time, the housing 501 is composed of multiple metal plates welded together, which facilitates production and manufacturing.

[0045] An airtightness testing device for an energy-saving plate-fin heat exchanger includes a frame assembly 100, which comprises a conveying mechanism and a fixing mechanism. The fixing mechanism is positioned above the conveying mechanism. The fixing mechanism includes a fixing frame 105, on which a liftable testing component 200 is mounted. The testing component 200 has a stabilizing component 400 for limiting the position of a connecting component 300. A fixing component 600 is fixedly mounted on the top of the fixing frame 105 and positioned on one side of the testing component 200 for clamping and fixing the heat exchanger assembly 500. The testing component 200 includes a fixing plate 201 and a connecting plate 202. The connecting plate 202 is fixedly mounted to the bottom of the fixing plate 201. A fixing shaft 206 is welded to the connecting plate 202, and a sliding sleeve 207 is rotatably connected within the fixing shaft 206. The sliding sleeve 207 has a rotatable... The connecting pipe 210 is fixedly connected at its end to the sleeve 214 for threaded connection with the end of the connecting pipe 301. The connecting plate 202 is provided with two connecting pipes 210 for connection to the air pump 203 and the pressure gauge 204 respectively. The stabilizing component 400 includes a rotating plate 401 and a crossbar 402. The rotating plate 401 is rotatably connected to the bottom surface of the connecting plate 202. The end of the rotating plate 401 is fixedly connected to the crossbar 402, and the crossbar 402 is arranged on both sides of the connecting pipe 301 for clamping and fixing the connecting pipe 301. A limit mechanism is fixedly installed on the crossbar 402. The conveying mechanism includes a support frame 101. Two conveying shafts 102 are rotatably connected to the top of the support frame 101. The conveying shafts 102 are connected to each other by a conveyor belt 103. A plurality of support rollers 104 are evenly arranged on the support frame 101, and each support roller 104 is in contact with the conveyor belt 103.

[0046] In this technical solution, the conveying mechanism can be used to transport heat exchangers. The heat exchanger to be tested is placed on the conveyor belt 103, and the support roller 104 provides stable support for the heat exchanger, ensuring stable transport. The rotation of the conveyor shaft 102 and the conveyor belt 103 can drive the heat exchanger to be transported, which facilitates the testing of multiple heat exchangers. Multiple heat exchangers can be placed on the conveyor belt 103 at the same time, and multiple testing mechanisms can be used to test multiple heat exchangers simultaneously.

[0047] The fixing mechanism includes a fixing frame 105, with an elongated hole 106 at the top of the fixing frame 105. A sliding plate 107 is slidably connected to the top surface of the fixing frame 105. A first hydraulic cylinder 108 is fixedly installed on the sliding plate 107. The telescopic end of the first hydraulic cylinder 108 is fixedly connected to the fixing plate 201. A T-shaped slide block 109 is fixedly connected to the bottom of the sliding plate 107. Both ends of the slide block 109 are provided with threaded holes connected to the lead screw. The first hydraulic cylinder 108 and the sliding plate 107 are both located inside the elongated hole 106.

[0048] In this technical solution, the fixed frame 105 is mounted on the support frame 101. The fixed frame 105 can drive the slide plate 107 and the slide block 109 to move synchronously, thereby driving the first hydraulic cylinder 108 on the slide plate 107 to adjust its position. It can be appropriately adjusted according to the position of the heat exchanger to ensure accurate alignment of the pipeline during testing. The slide block 109 is provided with a threaded hole connected to the lead screw. The slide block 109 can be translated by rotating the lead screw. The lead screw can be connected to the drive device. When the drive device drives the lead screw to rotate, the threaded connection between the lead screw and the slide block 109 can drive it to translate at the top of the fixed frame 105, which can realize the longitudinal adjustment of the position of the sleeve 214. When the slide block 109 moves in the elongated hole 106, the slide plate 107 can move stably.

[0049] The fixing plate 201 has a U-shaped structure and is fixedly connected to the air pump 203 and the pressure gauge 204 respectively. Both the air pump 203 and the pressure gauge 204 are fixedly connected to the fixing pipe 205, which is sealed and rotatably connected to the connecting pipe 210. The surface of the connecting pipe 210 has multiple evenly distributed second protrusions 211, which are located inside the sliding sleeve 207. The inner wall of the sliding sleeve 207 has multiple evenly distributed first protrusions 209, and the first protrusions 209 and second protrusions 211 are staggered to drive the connecting pipe 204 through the sliding sleeve 207. The connecting pipe 210 rotates synchronously, with a limiting rib 213 fixedly connected to its end. A motor 215 is fixedly mounted on the connecting plate 202, and the output end of the motor 215 is fixedly connected to a gear 216. The gear 216 rotates with both ends of the connecting plate 202. The gear 216 is located on one side of the sliding sleeve 207 and fits onto the surface of the connecting pipe 210. A gear ring 208 is fixedly connected to the edge of the sliding sleeve 207, and the gear 216 meshes with the gear ring 208. The connecting pipe 210 has an end head 212 at its end, and the end head 212 is rotatably connected to the fixed pipe 205.

[0050] In this technical solution, an air pump 203 and a pressure transformer are respectively connected to two ports of the housing 501. The air pump 203 discharges gas into one port, and the other port is sealed through a connecting pipe 210. The pressure is displayed by a pressure gauge 204. When the pressure gauge 204 remains vertical and unchanged for a long time, the air tightness is good. Otherwise, it indicates poor air tightness. During testing, the connection between the connecting pipe 210 and the connecting pipe 301 can be threaded to achieve a seal, ensuring that there will be no leakage at the tightened position during testing.

[0051] Specifically, during testing, the motor 215 drives the gear 216 to rotate. The meshing of the gear 216 and the gear ring 208 causes the sliding sleeve 207 to rotate within the fixed shaft 206. The engagement of the first protrusion 209 and the second protrusion 211 drives the connecting pipe 210 to rotate synchronously, which in turn drives the rotating sleeve 214 to rotate. The connecting pipe 210 drives the end 212 to rotate in a sealed manner within the fixed pipe 205. At the same time, the first hydraulic cylinder 108 extends to tighten the rotating sleeve 214 at the end of the connecting pipe 301 to achieve docking.

[0052] There are four rotating plates 401, which are evenly distributed around the connecting plate 202. The ends of every two rotating plates 401 are fixedly connected to the ends of the two horizontal bars 402. The adjacent ends of each horizontal bar 402 are fixedly connected to the limiting blocks 403. The limiting blocks 403 on the same side correspond to each other, and the limiting blocks 403 have an arc surface that contacts the connecting pipe 301. The rotating plates 401 are fixedly connected to the ends of the horizontal shafts 407. There are two horizontal shafts 407. A second cylinder 408 is provided between the two horizontal shafts 407. The second cylinder 408 is a bidirectional cylinder, and both telescopic shafts of the second cylinder 408 are fixedly connected to the sleeve.

[0053] In this technical solution, before docking, the second cylinder 408 is shortened, causing its two telescopic ends to pull the horizontal shaft 407. The horizontal shaft 407 causes the rotating plate 401 to rotate around its end, causing the horizontal bar 402 at the other end to come into contact with each other. At this time, the limiting blocks 403 at both ends of the horizontal bar 402 are tightly fitted, so that the two connecting pipes 301 are clamped between the horizontal bar 402, and the limiting blocks 403 limit the movement.

[0054] The fixing component 600 includes a second hydraulic cylinder 601, a limiting plate 602, and a clamping plate 604. The second hydraulic cylinder 601 is fixedly installed on the top of the fixing frame 105 and is located on one side of the detection component 200. The telescopic end of the second hydraulic cylinder 601 is fixedly connected to the U-shaped limiting plate 602, and two symmetrically distributed clamping plates 604 are rotatably connected inside the limiting plate 602. The two clamping plates 604 are symmetrically arranged on both sides of the housing 501. A connecting piece 605 is fixedly connected to the outer wall of each clamping plate 604. A third hydraulic cylinder 603 is fixedly installed on both outer walls of the limiting plate 602. The telescopic end of the third hydraulic cylinder 603 passes through the limiting plate 602 and is movably connected to the connecting piece 605. A pin located inside the connecting piece 605 is fixedly connected to the telescopic end of the third hydraulic cylinder 603, and the pin is located in an elongated shaft hole in the connecting piece 605 for stable rotation of the clamping plate 604.

[0055] In this technical solution, the fixing component 600 is used for lifting and fixing the housing 501. After the housing 501 is placed on the conveyor belt 103, it is transported to the designated fixing frame 105 by the rotation of the conveyor belt 103. At this time, the second hydraulic cylinder 601 drives the clamping plate 604 to move to both sides of the housing 501. The third hydraulic cylinder 603 is activated to push the connecting piece 605. When the pin on the telescopic end of the third hydraulic cylinder 603 slides in the shaft hole of the connecting piece 605, it pushes the clamping plate 604 to rotate, thereby clamping and fixing the housing 501. Finally, the second hydraulic cylinder 601 is activated to shorten and drive the heat exchanger to separate from the conveyor belt 103. During clamping, first ensure that the rotating sleeve 214 and the connecting pipe 301 are in the same position, and then lift the heat exchanger after clamping and fixing. By adjusting the position of the sliding plate 107, the rotating sleeve 214 and the port of the connecting pipe 301 are accurately aligned, which can realize the smooth operation of the airtightness test. At this time, the airtightness test of the heat exchanger is performed.

[0056] Specifically, multiple fixed frames 105 are set on the surface of the conveyor belt 103. After each heat exchanger is conveyed to the designated fixed frame 105, it is clamped and lifted by the clamping plate 604 to facilitate the continued conveying of subsequent heat exchangers. Thus, after multiple heat exchangers are conveyed by the conveyor belt 103, the airtightness of multiple heat exchangers is simultaneously tested.

[0057] The limiting mechanism includes a fixing block 404 and a first cylinder 405. The fixing block 404 is fixedly installed on the side wall of the crossbar 402. The fixing blocks 404 are staggered on the side walls of the two crossbars 402. Each fixing block 404 is fixedly connected to the first cylinder 405. The telescopic end of the first cylinder 405 is fixedly connected to the support block 406. The support block 406 is in contact with the surface of the connecting pipe 301. The support block 406 and the limiting block 403 are located on both sides of the connecting pipe 301, respectively.

[0058] In this technical solution, after the crossbar 402 clamps and fixes the connecting pipe 301, the first cylinder 405 on the fixing block 404 is activated. The first cylinder 405 extends and pushes the support block 406 against the connecting pipe 301, thereby pressing the connecting pipe 301 against the limiting block 403, which can achieve stable limiting of the connecting pipe 301. At this time, the first hydraulic cylinder 108 extends and drives the rotating sleeve 214 to stably correspond with the connecting pipe 301, which can achieve accurate connection, and then drives the rotating sleeve 214 to tighten at the end of the connecting pipe 301 to achieve connection.

[0059] Furthermore, after connection, the air pump 203 is started to fill the housing 501 with gas. After a certain period of time, the pressure is checked by the pressure gauge 204, which can facilitate the airtightness test.

[0060] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. An energy-saving plate-fin heat exchanger air tightness detection device, comprising a rack assembly (100), the rack assembly (100) is composed of a conveying mechanism and a fixing mechanism, the fixing mechanism is arranged above the conveying mechanism, characterized in that: The fixing mechanism comprises a fixing frame (105), a liftable detection assembly (200) is installed on the fixing frame (105), a stabilizing assembly (400) for limiting the communicating assembly (300) is arranged on the detection assembly (200), a fixing assembly (600) is fixedly installed on the top of the fixing frame (105), and the fixing assembly (600) is arranged on one side of the detection assembly (200) and used for clamping and fixing the heat exchanger assembly (500); The detection assembly (200) comprises a fixed plate (201) and a connecting plate (202), the connecting plate (202) is fixedly installed at the bottom end of the fixed plate (201), a fixed shaft (206) is welded and fixed on the connecting plate (202), a sliding sleeve (207) is rotatably connected in the fixed shaft (206), a connecting pipe (210) capable of rotating relatively is arranged in the sliding sleeve (207), the end of the connecting pipe (210) is fixedly connected with a rotating sleeve (214) and is used for being threadedly connected with the end of the communicating pipe (301), two connecting pipes (210) are arranged on the connecting plate (202) and are respectively connected with an air pump (203) and a pressure gauge (204); The stabilizing assembly (400) comprises a rotating plate (401) and a cross rod (402), the rotating plate (401) is rotatably connected with the bottom surface of the connecting plate (202), the end of the rotating plate (401) is fixedly connected with the cross rod (402), the cross rod (402) is arranged on the two sides of the communicating pipe (301) and is used for clamping and fixing the communicating pipe (301), and a limiting mechanism is fixedly installed on the cross rod (402); The heat exchanger assembly (500) comprises a shell (501), a conveying pipe group (502) and a fin group (505), the shell (501) is fixedly connected with a plurality of conveying pipe groups (502), and the fin group (505) is welded and fixed in the shell (501), characterized in that a separation cavity (503) is further arranged on the side wall of the shell (501), an interface is arranged on the outer side of the separation cavity (503) and is used for being connected with the communicating assembly (300), and a convex rib (504) is arranged on the inner wall of the interface. The communication assembly (300) comprises a communication pipe (301), the communication pipe (301) is internally embedded and connected with the convex interface, the end surface of the communication pipe (301) is provided with a sealing ring (302), the sealing ring (302) is connected with the convex rib (504), the surface of the communication pipe (301) is fixedly connected with a gasket (303), the gasket (303) is connected with the edge of the convex interface, the surface of the communication pipe (301) is movably sleeved with a screw sleeve (304), and the screw sleeve (304) is screw-connected with the convex interface; the shell (501) is a square hollow structure, the shell (501) is formed by welding a plurality of metal plates into a whole, a plurality of chambers are arranged on the side edge of the shell (501), the shell (501) at the chamber is welded and fixedly provided with a cover (506), the fin group (505) is made by interlaced welding of a plurality of corrugated and flat aluminum plates, and the medium flow channel formed by the fin group (505) is communicated with the conveying pipe group (502).

2. The energy-saving plate-fin heat exchanger gas tightness detection device according to claim 1, characterized in that: The conveying mechanism comprises a support frame (101), two conveying shafts (102) are rotatably connected to the top end of the support frame (101), the conveying shafts (102) are drivingly connected through a conveying belt (103), and a plurality of supporting rollers (104) are uniformly arranged on the support frame (101) and in contact with the conveying belt (103).

3. The energy-saving plate-fin heat exchanger gas tightness detection device according to claim 1, characterized in that: The fixing mechanism comprises a fixing frame (105), a long hole (106) is formed in the top of the fixing frame (105), a sliding plate (107) is slidably connected to the top surface of the fixing frame (105), a first hydraulic cylinder (108) is fixedly installed on the sliding plate (107), the telescopic end of the first hydraulic cylinder (108) is fixedly connected with a fixing plate (201), a T-shaped sliding seat (109) is fixedly connected to the bottom of the sliding plate (107), threaded holes connected with lead screws are formed at the two ends of the sliding seat (109), and the first hydraulic cylinder (108) and the sliding plate (107) are located inside the long hole (106).

4. The energy-saving plate-fin heat exchanger gas tightness detection device according to claim 3, characterized in that: The fixing plate (201) is in a U-shaped structure, the fixing plate (201) is fixedly connected with a gas pump (203) and a pressure gauge (204), the gas pump (203) and the pressure gauge (204) are fixedly connected with a fixing pipe (205), the fixing pipe (205) is sealingly and rotatably connected with a connecting pipe (210), a plurality of second protrusions (211) are arranged on the surface of the connecting pipe (210) and uniformly distributed, the second protrusions (211) are located inside a sliding sleeve (207), a plurality of first protrusions (209) are arranged on the inner wall of the sliding sleeve (207) and uniformly distributed, the first protrusions (209) and the second protrusions (211) are staggered and distributed to drive the connecting pipe (210) to rotate synchronously through the sliding sleeve (207), and a limiting rib (213) is fixedly connected to the end of the connecting pipe (210).

5. The energy-saving plate-fin heat exchanger hermeticity detection device according to claim 1, characterized in that: The connecting plate (202) is fixedly provided with a motor (215), the output end of the motor (215) is fixedly connected with a gear (216), the gear (216) is rotatably arranged at the two ends of the connecting plate (202), the gear (216) is arranged on one side of a sliding sleeve (207) and sleeved on the surface of a connecting pipe (210), the sliding sleeve (207) is fixedly connected with a gear ring (208) at the edge, the gear (216) is in meshing connection with the gear ring (208), and the connecting pipe (210) is provided with an end head (212) at the end, and the end head (212) is rotatably connected in the fixed pipe (205).

6. The energy-saving plate-fin heat exchanger hermeticity detection device according to claim 1, characterized in that: The number of the rotating plates (401) is four, the four rotating plates (401) are uniformly distributed around the connecting plate (202), the ends of every two rotating plates (401) are fixedly connected with the two ends of two end cross rods (402) respectively, the adjacent side ends of each cross rod (402) are fixedly connected with limiting blocks (403), the limiting blocks (403) located on the same side correspond to each other, and the limiting blocks (403) are provided with arc surfaces in contact with the communicating pipes (301); the rotating plates (401) are fixedly connected with the two ends of a horizontal shaft (407) respectively, the horizontal shaft (407) is rotatably connected with a sleeve pipe, the number of the horizontal shafts (407) is two, and a second air cylinder (408) is arranged between the two horizontal shafts (407), the second air cylinder (408) is a bidirectional air cylinder, and the two telescopic shafts of the second air cylinder (408) are fixedly connected with the sleeve pipe.

7. The energy-saving plate-fin heat exchanger hermeticity detection device according to claim 1, characterized in that: The fixing assembly (600) comprises a second hydraulic cylinder (601), a limiting plate (602) and a clamping plate (604), the second hydraulic cylinder (601) is fixedly installed at the top of the fixing frame (105), the second hydraulic cylinder (601) is arranged on one side of the detection assembly (200), the telescopic end of the second hydraulic cylinder (601) is fixedly connected with the U-shaped limiting plate (602), the limiting plate (602) is rotatably connected with two symmetrically distributed clamping plates (604) inside, the two clamping plates (604) are symmetrically arranged on the two sides of the shell (501), the outer side wall of each clamping plate (604) is fixedly connected with a connecting piece (605), the outer walls of the two sides of the limiting plate (602) are fixedly installed with third hydraulic cylinders (603), the telescopic end of the third hydraulic cylinder (603) penetrates through the limiting plate (602) and is movably connected with the connecting piece (605), the telescopic end of the third hydraulic cylinder (603) is fixedly connected with a pin shaft located inside the connecting piece (605), and the pin shaft is arranged in a long strip-shaped shaft hole formed in the connecting piece (605) to stably rotate the clamping plate (604).

8. The energy-saving plate-fin heat exchanger hermeticity detection device according to claim 1, characterized in that: The limiting mechanism comprises fixed blocks (404) and first air cylinders (405), the fixed blocks (404) are fixedly installed to the side walls of the cross bars (402), the fixed blocks (404) are staggered arranged on the side walls of the two cross bars (402), each fixed block (404) is fixedly connected with a first air cylinder (405), the telescopic end of the first air cylinder (405) is fixedly connected with a supporting block (406), the supporting block (406) is in surface contact with the communicating pipe (301), and the supporting block (406) and the limiting block (403) are respectively located on the two sides of the communicating pipe (301).

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