Double-tube-plate heat exchanger

Abstract

The invention discloses a double-tube-plate heat exchanger, and belongs to the technical field of heat exchangers, the double-tube-plate heat exchanger comprises a shell, tube plates are fixedly connected to the two sides in the shell, a plurality of heat exchange tubes are arranged in the tube plates, a second liquid outlet tube and a second liquid inlet tube are arranged on the outer surface of the shell, a distribution bin is fixedly connected to one side of the shell, and a first liquid outlet tube and a second liquid inlet tube are arranged on the other side of the shell. And the other side of the shell is fixedly connected with a confluence bin. When liquid leaks from the joint of a first liquid inlet pipe and an external pipeline, an annular frame can collect the leaked liquid, corrosive liquid is prevented from dripping into equipment and the surrounding environment, the annular frame and the interior of a water drainage pipe can be communicated with each other by rotating a ball and changing the state of a through hole, and the liquid leakage prevention effect is achieved. And the liquid in the annular frame enters an external hose through the drainage pipe to be discharged, so that the liquid can be prevented from being directly sprayed out from the interior of the drainage pipe in the process of pulling out the rubber plug to contaminate the hands of a worker and cause corrosion damage to the hands of the worker.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and more specifically, to a double tube sheet heat exchanger. Background Art

[0002] A heat exchanger is an energy-saving device that realizes heat transfer between materials among two or more fluids at different temperatures. It is one of the main devices for improving energy utilization efficiency, also known as a heat exchanger; it occupies an important position in industrial production such as chemical industry, petroleum, and power, and is generally divided into jacket type, plate type, shell and tube type, double tube sheet type, etc.; among them, a double tube sheet heat exchanger refers to a heat exchanger with two tube sheets having a certain gap at one end of the heat exchanger, which can effectively prevent material pollution caused by leakage.

[0003] Chinese Patent Application No. CN119412974A discloses a double tube sheet heat exchanger, which can enhance the sealing effect through the first sealing device and the second sealing device to prevent liquid leakage. However, the first sealing device and the second sealing device always have the possibility of aging. Once aging occurs and the liquid inside the heat exchanger leaks, if the heat exchanger contains corrosive liquid and leaks, it will corrode the surrounding equipment, and it will increase the danger of the operators during cleaning. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a double tube sheet heat exchanger.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] The double tube sheet heat exchanger includes a shell, on both sides inside the shell are fixedly connected with tube sheets, inside the tube sheets are provided with a plurality of heat exchange tubes, on the outer surface of the shell are provided with a second liquid outlet pipe and a second liquid inlet pipe, on one side of the shell is fixedly connected with a distribution chamber, on the other side of the shell is fixedly connected with a confluence chamber, inside the distribution chamber is fixedly connected with a partition plate, on the outer surface of the distribution chamber are provided with a first liquid inlet pipe and a first liquid outlet pipe, and on the outer surface of the first liquid inlet pipe is provided with a collection assembly for collecting leaked liquid.

[0007] The collection assembly includes a fixed cylinder fixed on the outer surface of the first liquid inlet pipe, at the bottom of the fixed cylinder is fixedly connected with an annular frame, at the bottom of the annular frame is fixedly connected with a drain pipe, on the inner surface of the drain pipe is fixedly connected with a fixed frame, inside the fixed frame is rotatably connected with a spherical ball, inside the spherical ball is provided with a through hole, and on the outer surface of the through hole is fixedly connected with a rotating handle.

[0008] Further, a rubber plug is inserted into the inner bottom of the drain pipe. One side of the rotating handle extends out of the interior of the drain pipe. The top of the first liquid inlet pipe is located inside the fixed cylinder. The first liquid inlet pipe and the first liquid outlet pipe are arranged symmetrically on the outer surface of the distribution bin. The first liquid outlet pipe and the second liquid outlet pipe are respectively located on both sides of the housing, one above the other.

[0009] A sealing assembly for sealing the connection of the first liquid inlet pipe is arranged on the outer surface of the fixed cylinder. The sealing assembly includes a rotating ring rotatably connected to the outer surface of the fixed cylinder, four telescopic rods uniformly slidably connected inside the fixed cylinder, and two energized electrodes fixedly arranged on the inner surface of the annular frame. Four driving grooves are uniformly formed inside the rotating ring. A convex rod is fixedly connected to the top of the telescopic rod. A sealing strip is fixedly connected to one side of the telescopic rod. An arc-shaped rack is fixedly connected to the edge of the lower surface of the rotating ring. A first servo motor is fixedly connected to the outer surface of the fixed cylinder. The output end of the first servo motor is fixedly connected to a gear.

[0010] One side of the telescopic rod extends into the interior of the fixed cylinder. The top of the convex rod extends into the driving groove and slides with each other. The gear and the arc-shaped rack are meshed with each other.

[0011] A closing assembly for closing the first servo motor is arranged inside the rotating ring. The closing assembly includes a pull rod slidably connected inside the rotating ring and a groove formed at the edge of the top of the fixed cylinder. A pressing rod is fixedly connected to the top of the pull rod. A first spring is sleeved on the outer surface of the pull rod. A first servo motor switch is fixedly connected to the inner bottom of the groove.

[0012] A limiting plate is fixedly connected to the bottom of the pull rod. The first spring is located above the limiting plate. The pressing rod is adapted to the groove.

[0013] A scraping assembly for removing dirt on the outer surface of the heat exchange tube is arranged on one side of the distribution bin. The scraping assembly includes a second servo motor fixed on one side of the distribution bin and four baffle plates sleeved on the outer surface of the heat exchange tube. A connecting rod is fixedly connected inside the four baffle plates. The output end of the second servo motor is fixedly connected to a lead screw. A scraping hole corresponding to the heat exchange tube is formed inside the baffle plate. A sealing cavity is fixedly connected to the connection part between the lead screw and the interior of the distribution bin.

[0014] One side of the lead screw extends into the interior of the housing. One side of the lead screw penetrates through a baffle plate. The lead screw is connected to the baffle plate by threads. The four baffle plates are arranged in sequence at equal intervals. The opening directions of two adjacent baffle plates are opposite.

[0015] The inner surface of the scraping hole is provided with a fitting component, and the fitting component includes two slots opened on the inner surface of the scraping hole. One side inside the slot is fixedly connected with a second spring, and one side of the second spring is fixedly connected with an arc-shaped scraping plate.

[0016] One side of the arc-shaped scraping plate extends out of the inside of the slot, and the arc-shaped edge of the arc-shaped scraping plate fits with the outer surface of the heat exchange tube.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this solution, by setting up a collection component, when liquid leaks from the connection between the first liquid inlet pipe and the external pipeline, the annular frame can collect the leaked liquid, preventing corrosive liquid from dripping onto the equipment and the surrounding environment. By rotating the spherical ball to change the state of the through hole, the inside of the annular frame and the drain pipe can be interconnected, and the liquid inside the annular frame then enters the external hose through the drain pipe and is discharged, avoiding the liquid spraying directly from the inside of the drain pipe and contaminating the hands of the staff during the process of pulling out the rubber plug, causing corrosive damage to the hands of the staff.

[0018] 2. In this solution, by setting up a sealing component, as the water level rises, it will gradually contact the two energized electrodes, causing the two energized electrodes to be connected to form a circuit, so that the first servo motor is energized. Through transmission, the four sealing strips tightly wrap the outside of the first liquid inlet pipe, and the leakage point of the first liquid inlet pipe can be blocked in time. It can be temporarily blocked during the heat exchange process without stopping, eliminating the need for operators to constantly observe whether there is leakage in the equipment and avoiding the reduction of work efficiency caused by long-term heat exchange shutdown for maintenance operations.

[0019] 3. In this solution, by setting up a closing component, rotating the rotating ring drives the pull rod to move, and the pull rod drives the extrusion rod located at the upper edge of the fixed cylinder to move towards the groove. The sealing strip stops moving, and the extrusion rod synchronously moves into the groove and quickly squeezes the first servo motor switch, cutting off the power supply of the first servo motor and closing it, ensuring that the first servo motor can be flexibly closed, avoiding overheating damage inside the motor caused by continuous power-on operation of the first servo motor, effectively ensuring the flexible opening and closing of the first servo motor during operation, and improving the service life of the first servo motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is an internal structural diagram of the present invention; Figure 3 is a schematic structural diagram of the collection component of the present invention Figure 1 ; Figure 4 is a schematic internal structural diagram of the fixed cylinder of the present invention; Figure 5 Schematic diagram of the internal structure of the drain pipe of the present invention; Figure 6 Schematic diagram of the structure of the collection component of the present invention Figure 2 ; Figure 7 Schematic diagram of the structure of the closing component of the present invention; Figure 8 Schematic diagram of the structure of the scraping component of the present invention; Figure 9 Schematic diagram of the structure of the baffle of the present invention; Figure 10 Schematic diagram of the structure of the sealing cavity of the present invention; Figure 11 Schematic diagram of the structure of the fitting component of the present invention.

[0021] Description of the reference numerals in the figure: 1. Housing; 2. Confluence chamber; 3. Tube plate; 4. Distribution chamber; 5. First liquid inlet pipe; 6. Second liquid outlet pipe; 7. Collection component; 71. Fixed cylinder; 72. Ring frame; 73. Sealing component; 731. Rotating ring; 732. Driving groove; 733. Convex rod; 734. Sealing strip; 735. Gear; 736. Arc rack; 737. Expansion rod; 738. First servo motor; 739. Energized electrode; 74. Closing component; 741. Extrusion rod; 742. Pull rod; 743. First spring; 744. First servo motor switch; 745. Groove; 75. Drain pipe; 76. Rotating handle; 77. Ball; 78. Through hole; 79. Fixed frame; 8. Scraping component; 81. Second servo motor; 82. Lead screw; 83. Scraping hole; 84. Baffle; 85. Connecting rod; 86. Sealing cavity; 87. Fitting component; 871. Groove; 872. Second spring; 873. Arc scraper; 9. Partition board; 10. First liquid outlet pipe; 11. Second liquid inlet pipe; 12. Heat exchange pipe. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 to 11, A double-tube-sheet heat exchanger, comprising a shell 1, tube sheets 3 fixedly connected to both sides inside the shell 1, a plurality of heat exchange tubes 12 arranged inside the tube sheets 3, a second liquid outlet pipe 6 and a second liquid inlet pipe 11 arranged on the outer surface of the shell 1, a distribution chamber 4 fixedly connected to one side of the shell 1, a confluence chamber 2 fixedly connected to the other side of the shell 1, a partition plate 9 fixedly connected inside the distribution chamber 4, a first liquid inlet pipe 5 and a first liquid outlet pipe 10 arranged on the outer surface of the distribution chamber 4, and a collection assembly 7 for collecting leaked liquid arranged on the outer surface of the first liquid inlet pipe 5.

[0024] As Figures 3 - 6 shown, the collection assembly 7 includes a fixed cylinder 71 fixed on the outer surface of the first liquid inlet pipe 5, an annular frame 72 fixedly connected to the bottom of the fixed cylinder 71, a drain pipe 75 fixedly connected to the bottom of the annular frame 72, a fixed frame 79 fixedly connected to the inner surface of the drain pipe 75, a spherical ball 77 rotatably connected inside the fixed frame 79, a through hole 78 opened inside the spherical ball 77, and a rotating handle 76 fixedly connected to the outer surface of the through hole 78.

[0025] A rubber plug is inserted into the inner bottom of the drain pipe 75, one side of the rotating handle 76 extends out of the inside of the drain pipe 75, the top of the first liquid inlet pipe 5 is located inside the fixed cylinder 71, the first liquid inlet pipe 5 and the first liquid outlet pipe 10 are arranged on the outer surface of the distribution chamber 4 in an axisymmetric manner, and the first liquid outlet pipe 10 and the second liquid outlet pipe 6 are respectively located on both sides of the shell 1, one above the other.

[0026] During normal heat exchange operation of the heat exchanger, the first heat exchange liquid is conveyed into the inside of the distribution chamber 4 through the first liquid inlet pipe 5, the second heat exchange liquid is conveyed into the inside of the shell 1 through the second liquid inlet pipe 11. The first heat exchange liquid enters the inside of the heat exchange tubes 12 through the upper heat exchange tubes 12, then enters the lower heat exchange tubes 12 through the confluence chamber 2, and then flows into the lower part of the distribution chamber 4. The second heat exchange liquid enters the inside of the shell 1, exchanges heat with the first heat exchange liquid through the heat exchange tubes 12, and finally is output through the second liquid outlet pipe 6; During liquid transmission, the seal will age, and the liquid inside the first liquid inlet pipe 5 will leak. When the liquid leaks from the connection between the first liquid inlet pipe 5 and the external pipeline, the leaked liquid drips along the flange of the first liquid inlet pipe 5. The dripped liquid enters the inside of the annular frame 72 through the fixed cylinder 71. The annular frame 72 can collect the leaked liquid to prevent corrosive liquid from dripping on the equipment and the surrounding environment. When draining the liquid inside the annular frame 72, the rubber plug of the drain pipe 75 can be pulled out, and a hose is connected to the drain pipe 75. Rotating the rotating handle 76 drives the ball 77 to rotate. The ball 77 drives the through hole 78 to be in a vertical state, so that the inside of the annular frame 72 and the drain pipe 75 are interconnected. The liquid inside the annular frame 72 then enters the external hose through the drain pipe 75 and is discharged, which can prevent the liquid from directly spraying out from the inside of the drain pipe 75 and contaminating the hands of the staff during the process of pulling out the rubber plug, causing corrosive damage to the hands of the staff.

[0027] As Figures 3 - 6 shown, a sealing assembly 73 for sealing the connection of the first liquid inlet pipe 5 is provided on the outer surface of the fixed cylinder 71. The sealing assembly 73 includes a rotating ring 731 rotatably connected to the outer surface of the fixed cylinder 71, four telescopic rods 737 uniformly slidably connected inside the fixed cylinder 71, and two energized electrodes 739 fixedly arranged on the inner surface of the annular frame 72. Four driving grooves 732 are uniformly formed inside the rotating ring 731. A convex rod 733 is fixedly connected to the top of the telescopic rod 737. A sealing strip 734 is fixedly connected to one side of the telescopic rod 737. An arc-shaped rack 736 is fixedly connected to the edge of the lower surface of the rotating ring 731. A first servo motor 738 is fixedly connected to the outer surface of the fixed cylinder 71. The output end of the first servo motor 738 is fixedly connected to a gear 735.

[0028] One side of the telescopic rod 737 extends into the inside of the fixed cylinder 71, and the top of the convex rod 733 extends into the inside of the driving groove 732 and slides with each other. The gear 735 and the arc-shaped rack 736 are meshed with each other.

[0029] Although the annular frame 72 can seal the liquid leaking from the connection between the first liquid inlet pipe 5 and the external pipeline, if the leakage position is not blocked in time, the leaked liquid will continue to increase. Since the amount contained in the annular frame 72 is fixed, it is easy to cause liquid loss and waste. Therefore, when the liquid in the annular frame 72 accumulates more and more, as the water level rises, it will gradually contact the two energized electrodes 739, causing the two energized electrodes 739 to be connected to form a circuit, and thus the first servo motor 738 is energized. The first servo motor 738 drives the gear 735 to rotate. The gear 735 drives the rotating ring 731 to rotate through the arc-shaped rack 736. The rotating ring 731 pushes the convex rod 733 to move through the driving groove 732. The convex rod 733 drives the sealing strip 734 to move towards the first liquid inlet pipe 5 through the telescopic rod 737. The four sealing strips 734 tightly wrap the outer side of the first liquid inlet pipe 5, and can timely block the leakage of the first liquid inlet pipe 5. It can be temporarily blocked without stopping the heat exchange process, eliminating the need for the operator to constantly observe whether there is leakage in the equipment, and avoiding the problem of low work efficiency caused by long-term heat exchange stoppage for maintenance operations.

[0030] As Figure 4 and Figure 7 shown, a closing assembly 74 for turning off the first servo motor 738 is provided inside the rotating ring 731. The closing assembly 74 includes a pull rod 742 slidably connected inside the rotating ring 731 and a groove 745 opened at the top edge of the fixed cylinder 71. A pressing rod 741 is fixedly connected to the top of the pull rod 742. A first spring 743 is sleeved on the outer surface of the pull rod 742. A first servo motor switch 744 is fixedly connected to the inner bottom of the groove 745.

[0031] A limiting plate is fixedly connected to the bottom of the pull rod 742. The first spring 743 is located above the limiting plate. The pressing rod 741 is adapted to the groove 745.

[0032] During the heat exchange process, the circuit is connected by the rising water level contacting the two energized electrodes 739, turning on the first servo motor 738 to work, and driving the sealing strip 734 to block the first liquid inlet pipe 5 through transmission. However, after the sealing strip 734 contacts and presses against the first liquid inlet pipe 5, it cannot move further, and the rotating ring 731 stops rotating. At this time, the first servo motor 738 is still in the energized working state, which will cause the first servo motor 738 to be stuck and the internal components to heat up and be damaged; Therefore, when the rotating ring 731 starts to rotate, it drives the pull rod 742 to move. The pull rod 742 drives the extrusion rod 741 located at the upper edge of the fixed cylinder 71 to move towards the groove 745. When the sealing strip 734 stops moving, the extrusion rod 741 synchronously moves into the interior of the groove 745. Under the elastic force of the pull rod 742, the extrusion rod 741 is quickly pulled to squeeze the first servo motor switch 744, cutting off the power supply of the first servo motor 738 and closing it, thus ensuring that the first servo motor 738 can be flexibly closed, preventing the first servo motor 738 from continuously working with power on and causing heat damage inside the motor, effectively ensuring the flexible opening and closing of the first servo motor 738 during operation and increasing the service life of the first servo motor 738.

[0033] As Figures 8 - 10 shown, a scraping assembly 8 for removing dirt on the outer surface of the heat exchange tube 12 is provided on one side of the distribution bin 4. The scraping assembly 8 includes a second servo motor 81 fixed on one side of the distribution bin 4 and four baffle plates 84 sleeved on the outer surface of the heat exchange tube 12. A connecting rod 85 is fixedly connected inside the four baffle plates 84. The output end of the second servo motor 81 is fixedly connected with a lead screw 82. A scraping hole 83 corresponding to the heat exchange tube 12 is opened inside the baffle plate 84. A sealing cavity 86 is fixedly connected at the connection between the lead screw 82 and the interior of the distribution bin 4.

[0034] One side of the lead screw 82 extends into the interior of the housing 1. One side of the lead screw 82 penetrates through one baffle plate 84. The lead screw 82 is connected to the baffle plate 84 through a thread. The four baffle plates 84 are arranged at equal intervals in sequence, and the openings of two adjacent baffle plates 84 face in opposite directions.

[0035] During heat exchange, the liquid often contains some impurities. The impurities will adhere to the surface of the heat exchange tube 12. If the impurities accumulate too thickly, it will affect heat transfer and greatly reduce the heat exchange effect of the heat exchange equipment. It is necessary to clean the impurities on the outer surface of the heat exchange tube 12. At this time, the second servo motor 81 is started to drive the lead screw 82 to rotate. The lead screw 82 drives the baffle plate 84 to slide back and forth on the outer surface of the heat exchange tube 12 through the thread. The scraping hole 83 scrapes the impurities on the surface of the heat exchange tube 12. Moreover, the baffle plate 84 can move during the heat exchange process, which can not only prevent the adhesion of impurities, but also stir the liquid inside the housing 1, making the liquid heat more evenly, able to absorb more heat, and further improving the heat exchange efficiency.

[0036] As Figure 11 shown, a fitting assembly 87 is provided on the inner surface of the scraping hole 83. The fitting assembly 87 includes two slots 871 opened on the inner surface of the scraping hole 83. A second spring 872 is fixedly connected to one side inside the slot 871. One side of the second spring 872 is fixedly connected to an arc-shaped scraping plate 873.

[0037] One side of the arc-shaped scraper 873 extends out of the interior of the slotted opening 871, and the arc-shaped edge of the arc-shaped scraper 873 is in mutual contact with the outer surface of the heat exchange tube 12.

[0038] When the baffle 84 moves for a long time, there is friction between the scraping hole 83 and the heat exchange tube 12, which will cause continuous wear inside the scraping hole 83, and there will be a situation where there is a gap between the scraping hole 83 and the heat exchange tube 12, resulting in the scraping hole 83 being unable to scrape the impurities on the surface of the heat exchange tube 12. When the inner wall of the scraping hole 83 is worn and there is a gap between it and the heat exchange tube 12, at this time, the second spring 872 pushes the arc-shaped scraper 873 closer to the outer surface of the heat exchange tube 12. Under the action of the second spring 872, the arc-shaped scraper 873 is always in mutual contact with the outer surface of the heat exchange tube 12. Thus, when the baffle 84 moves, it drives the arc-shaped scraper 873 to scrape the surface of the heat exchange tube 12, improving the cleaning effect of the baffle 84.

[0039] Usage method: When liquid leaks from the connection between the first liquid inlet pipe 5 and the external pipeline, the leaked liquid drips along the flange of the first liquid inlet pipe 5, and the dripping liquid enters the interior of the annular frame 72 through the fixed cylinder 71. The annular frame 72 can collect the leaked liquid, preventing the corrosive liquid from dripping on the equipment and the surrounding environment. When discharging the liquid inside the annular frame 72, the rubber plug of the drain pipe 75 can be pulled out, and a hose is connected to the drain pipe 75. Rotate the rotating handle 76 to drive the ball 77 to rotate. The ball 77 drives the through hole 78 to be in a vertical state, connecting the interiors of the annular frame 72 and the drain pipe 75. The liquid inside the annular frame 72 enters the external hose through the drain pipe 75 and is discharged; When the liquid inside the annular frame 72 accumulates more and more, as the water level rises, it will gradually contact the two energized electrodes 739, causing the two energized electrodes 739 to be connected to form a circuit. Thus, the first servo motor 738 is energized, and the first servo motor 738 drives the gear 735 to rotate. The gear 735 drives the rotating ring 731 to rotate through the arc-shaped rack 736. The rotating ring 731 pushes the convex rod 733 to move through the driving groove 732. The convex rod 733 drives the sealing strip 734 to move towards the first liquid inlet pipe 5 through the telescopic rod 737. The four sealing strips 734 tightly wrap the outside of the first liquid inlet pipe 5, and can timely block the leakage point of the first liquid inlet pipe 5; When the rotating ring 731 just starts to rotate, it drives the pull rod 742 to move. The pull rod 742 drives the extrusion rod 741 located at the upper edge of the fixed cylinder 71 to move towards the groove 745. The extrusion rod 741 then slides along the upper edge of the fixed cylinder 71. When the sealing strip 734 stops moving, the extrusion rod 741 synchronously moves into the interior of the groove 745. Under the elastic force of the pull rod 742, the extrusion rod 741 is quickly pulled to squeeze the first servo motor switch 744, cutting off the power supply of the first servo motor 738 and turning it off, thus ensuring that the first servo motor 738 can be turned off flexibly and preventing the first servo motor 738 from being continuously powered on and working, which may cause overheating and damage inside the motor.

[0040] Start the second servo motor 81 to drive the lead screw 82 to rotate. The lead screw 82 drives the baffle 84 to slide back and forth on the outer surface of the heat exchange tube 12 through the thread. The scraping holes 83 scrape off the impurities on the surface of the heat exchange tube 12. When there is wear on the inner wall of the scraping holes 83 and there is a gap between the heat exchange tube 12, at this time, the second spring 872 pushes the arc-shaped scraper 873 towards the outer surface of the heat exchange tube 12. Under the action of the second spring 872, the arc-shaped scraper 873 is always in contact with the outer surface of the heat exchange tube 12. Thus, when the baffle 84 moves, it drives the arc-shaped scraper 873 to scrape the surface of the heat exchange tube 12, improving the cleaning effect of the baffle 84. The sealing cavity 86 can improve the sealing performance between the lead screw 82 and the distribution bin 4, preventing leakage at the connection.

[0041] The above is only the preferred specific implementation mode of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent replacements or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A double tube sheet heat exchanger, comprising a shell (1), tube sheets (3) being fixedly connected to both sides of the shell (1), a plurality of heat exchange tubes (12) being arranged inside the tube sheets (3), a second liquid outlet pipe (6) and a second liquid inlet pipe (11) being arranged on the outer surface of the shell (1), a distribution bin (4) being fixedly connected to one side of the shell (1), a confluence bin (2) being fixedly connected to the other side of the shell (1), a partition plate (9) being fixedly connected to the inside of the distribution bin (4), and a first liquid inlet pipe (5) and a first liquid outlet pipe (10) being arranged on the outer surface of the distribution bin (4); Features: The outer surface of the first liquid inlet pipe (5) is provided with a collecting component (7) for collecting leaked liquid; The collecting assembly (7) comprises a fixed cylinder (71) fixed to the outer surface of the first liquid inlet pipe (5); the bottom of the fixed cylinder (71) is fixedly connected to an annular frame (72); the bottom of the annular frame (72) is fixedly connected to a drain pipe (75); the inner surface of the drain pipe (75) is fixedly connected to a fixed frame (79); the interior of the fixed frame (79) is rotatably connected to a sphere (77); a through hole (78) is provided inside the sphere (77); and the outer surface of the through hole (78) is fixedly connected to a rotating handle (76).

2. The double tube sheet heat exchanger according to claim 1, characterized in that: A rubber plug is inserted into the inner bottom of the drain pipe (75), one side of the rotating handle (76) extends out of the interior of the drain pipe (75), the top of the first liquid inlet pipe (5) is located inside the fixed cylinder (71), the first liquid inlet pipe (5) and the first liquid outlet pipe (10) are arranged on the outer surface of the distribution chamber (4) in an axially symmetrical manner, and the first liquid outlet pipe (10) and the second liquid outlet pipe (6) are located on both sides of the shell (1) one above and one below.

3. The double tube sheet heat exchanger according to claim 2, characterized in that: The outer surface of the fixed cylinder (71) is provided with a sealing assembly (73) for sealing the connection with the first liquid inlet pipe (5). The sealing assembly (73) comprises a rotating ring (731) rotatably connected to the outer surface of the fixed cylinder (71), four telescopic rods (737) uniformly slidably connected to the inside of the fixed cylinder (71), and two energized electrodes (739) fixedly arranged on the inner surface of the annular frame (72). Four driving grooves (732) are uniformly opened inside the rotating ring (731). The top of the telescopic rod (737) is fixedly connected to a convex rod (733). One side of the telescopic rod (737) is fixedly connected to a sealing strip (734). The edge of the lower surface of the rotating ring (731) is fixedly connected to an arc-shaped rack (736). The outer surface of the fixed cylinder (71) is fixedly connected to a first servo motor (738), and the output end of the first servo motor (738) is fixedly connected to a gear (735).

4. The double tube sheet heat exchanger according to claim 3, characterized in that: One side of the telescopic rod (737) extends to the inside of the fixed cylinder (71), the top of the protruding rod (733) extends to the inside of the driving groove (732) and slides with each other, and the gear (735) and the arc-shaped rack (736) are meshed with each other.

5. The double tube sheet heat exchanger according to claim 4, characterized in that: A closing component (74) for closing the first servo motor (738) is arranged inside the rotating ring (731), and the closing component (74) includes a pull rod (742) slidably connected to the inside of the rotating ring (731) and a groove (745) opened at the top edge of the fixed cylinder (71), the top of the pull rod (742) is fixedly connected to an extrusion rod (741), the outer surface of the pull rod (742) is sleeved with a first spring (743), and the inner bottom of the groove (745) is fixedly connected to the first servo motor switch (744).

6. The double tube sheet heat exchanger according to claim 5, characterized in that: The bottom of the pull rod (742) is fixedly connected to the limiting plate, the first spring (743) is located above the limiting plate, and the extrusion rod (741) and the groove (745) are adapted to each other.

7. The double tube sheet heat exchanger according to claim 1, characterized in that: A scraping assembly (8) for removing dirt from the outer surface of the heat exchange tube (12) is arranged on one side of the distribution bin (4), and the scraping assembly (8) comprises a second servo motor (81) fixed to one side of the distribution bin (4) and four baffles (84) sleeved on the outer surface of the heat exchange tube (12), the inside of the four baffles (84) are fixedly connected with connecting rods (85), the output end of the second servo motor (81) is fixedly connected with a screw rod (82), the inside of the baffle plate (84) is provided with a scraping hole (83) corresponding to the heat exchange tube (12), and the connection between the screw rod (82) and the inside of the distribution bin (4) is fixedly connected with a sealing cavity (86).

8. The double tube sheet heat exchanger according to claim 7, characterized in that: One side of the screw rod (82) extends into the interior of the housing (1), one side of the screw rod (82) passes through a baffle plate (84), the screw rod (82) is connected to the baffle plate (84) via a thread, four baffle plates (84) are arranged in sequence at equal intervals, and the openings of two adjacent baffle plates (84) face opposite directions.

9. The double tube sheet heat exchanger according to claim 8, characterized in that: The inner surface of the scraping hole (83) is provided with a fitting component (87), the fitting component (87) comprising two slots (871) formed on the inner surface of the scraping hole (83), a second spring (872) being fixedly connected to one side of the slot (871), and an arc-shaped scraper (873) being fixedly connected to one side of the second spring (872).

10. The double tube sheet heat exchanger according to claim 9, characterized in that: One side of the arc-shaped scraper (873) extends out of the interior of the slot (871), and the arc-shaped edge of the arc-shaped scraper (873) fits against the outer surface of the heat exchange tube (12).

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