Tubular heat exchanger easy to clean

Abstract

The invention relates to the technical field of tubular heat exchangers, in particular to an easy-to-clean tubular heat exchanger which comprises a middle tube internally provided with a heat exchange tube, and the two ends of the middle tube are each connected with an end socket through a flange; a support capable of moving in the axis direction of the middle pipe is arranged in the middle pipe, and a cleaning brush used for cleaning the outer wall of the heat exchange pipe is arranged on the support. A linear driving assembly and a cleaning pipe are arranged on the middle pipe, and the linear driving assembly drives the support to move by converting kinetic energy generated by impact of water flow in the cleaning pipe into mechanical energy; the cleaning brush is coaxially connected with a swing pipe, and the swing pipe is provided with a spray head communicating with the cleaning pipe. A swing mechanism used for controlling the swing pipe to rotate is arranged on the support. The function of improving the cleaning effect is achieved, and the cleaning effect on flushing dead corners is improved by controlling the cleaning brush to swing to be matched with the nozzles. The problem that the overall heat exchange efficiency is affected due to the fact that an existing tubular heat exchanger cannot clean and wash dead corners is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tubular heat exchangers, and in particular to an easy-to-clean tubular heat exchanger. Background Art

[0002] Tubular heat exchangers are the most widely used partition-type heat exchange equipment in the industrial field. Over long-term use, impurities accumulate on their surfaces, affecting the heat transfer efficiency of the pipes. Therefore, regular cleaning of the heat exchangers is necessary. Existing tubular heat exchangers typically use a water gun to clean the pipes. However, this process can still leave blind spots, requiring operators to individually address each blind spot. These blind spots are often difficult to directly access, resulting in poor cleaning results.

[0003] To this end, Chinese patent application CN115930642B discloses a high-temperature tubular heat exchanger. This design utilizes a linkage between an impurity cleaning mechanism and an auxiliary cleaning mechanism. This allows operators to adjust the high-pressure water gun to medium pressure and aim it at the impact plate. The impact force of the water flow drives the annular rotating shell, simultaneously driving the magnetic connection plate and the attached cleaning brush to instantly clean the scraper shell surface. This prevents the loss of heat exchange efficiency and the difficulty of secondary cleaning caused by impurity accumulation in the shell, ensuring self-cleaning and efficient maintenance of the heat exchange component.

[0004] However, today’s tubular heat exchangers with integrated cleaning equipment still require operators to use a water gun to drive the impact force provided by the flushing at the designated position, and the operator is required to manually control the flushing position. Once the flushing position deviates, the brush will not be able to move normally, seriously affecting the cleaning effect. In addition, in the process of converting the impact of the water flow into mechanical kinetic energy through the fan blades, there will be some energy loss. During the flushing process, the water flow still has blind spots for cleaning, and in the blind spots, cleaning can only be done with a brush. When it is impossible to cooperate with the impact of the water flow, cleaning with a brush alone will not only fail to achieve the desired cleaning effect, but the brush will also easily adhere to impurities, and then scratch the pipe during movement. Summary of the Invention

[0005] In response to the above problems, an easy-to-clean tubular heat exchanger is provided. Through a bracket, a cleaning brush and a swinging tube, the problem that the existing tubular heat exchanger cannot clean and flush dead corners, thereby affecting the overall heat exchange efficiency, is solved.

[0006] In order to solve the problems of the prior art, the present invention provides an easy-to-clean tubular heat exchanger, comprising a middle tube with a built-in heat exchange tube, with both ends of the middle tube respectively connected to a head through a flange; a bracket that can move along the axis of the middle tube is provided in the middle tube, and a cleaning brush for cleaning the outer wall of the heat exchange tube is provided on the bracket; a linear drive component and a cleaning pipe are provided on the middle tube, and the linear drive component drives the bracket to move by converting kinetic energy generated by the impact of water flow in the cleaning pipe into mechanical energy; a swing tube is coaxially connected to the cleaning brush, and a nozzle connected to the cleaning pipe is provided on the swing tube; a swing mechanism for controlling the rotation of the swing tube is provided on the bracket; when the linear drive component drives the bracket and the cleaning brush to move, the swing mechanism controls the swing tube to swing along the circumference of the heat exchange tube.

[0007] Preferably, the linear drive assembly includes a reciprocating screw and a support plate; the reciprocating screw is rotatably arranged on the head, and the bracket is threadedly connected to the reciprocating screw; the support plate is connected to the inner wall of the cleaning tube, and a first rotating shaft is rotatably arranged on the support plate. When the first rotating shaft rotates, the torque is transmitted to the reciprocating screw to drive the reciprocating screw to rotate.

[0008] Preferably, the swing tube is rotatably connected to the bracket through a torsion spring, and a first lever is provided on the swing tube; a mounting ring is rotatably provided on the bracket, and when the reciprocating screw rotates, the mounting ring is driven to rotate synchronously; a second lever is provided on the mounting ring, and during the rotation of the mounting ring, when the second lever contacts the first lever, it pushes the first lever and the swing tube to rotate.

[0009] Preferably, a rotating gear is rotatably provided on the bracket, and a plurality of rotating gears are provided and correspond one to one with the heat exchange tubes; a gear ring is rotatably provided on the bracket, and the plurality of rotating gears are meshed and connected with the gear ring.

[0010] Preferably, the cleaning brush includes a first brush body and a second brush body, both of which are provided with a guide portion; the inner ring of the swing tube is provided with a slide groove that cooperates with the guide portion; the swing tube is provided with a connecting assembly for connecting the swing tube and the cleaning brush.

[0011] Preferably, an annular frame is rotatably provided on the bracket, and a limiting block for limiting the movement of the cleaning brush is provided on the annular frame.

[0012] Preferably, a support is installed on the swing tube, and a card block and an elastic member are provided on the support, and the two ends of the elastic member are respectively connected to the card block and the support; grooves are provided on the guide parts of the first brush body and the second brush body, and after the first brush body and the second brush body are assembled, the two grooves cooperate to form a card slot for plugging and cooperating with the card block; a control component for controlling the separation of the card block and the card slot is provided on the support.

[0013] Preferably, the control assembly includes a guide rod and a handle; the guide rod is slidably mounted on the support, and both ends of the guide rod are respectively connected to the clamping block and the handle.

[0014] Preferably, the first brush body and the second brush body are respectively connected with a first magnetic strip and a second magnetic strip that can attract each other.

[0015] Preferably, a sealed cabin is provided on one side of the middle tube close to the gear ring, and when the bracket and the sealed cabin cooperate, a sealed space is formed to protect the rotating gear and the gear ring.

[0016] Compared with the prior art, the present invention has the following advantages: 1. The present invention achieves the function of improving the cleaning effect through the bracket, cleaning brush and swinging tube, and improves the cleaning effect of flushing dead corners by controlling the swing of the cleaning brush and cooperating with the nozzle. The flushing of the nozzle is used to prevent impurities from adhering to the cleaning brush, avoiding damage to the heat exchange tube during the cleaning process, thereby improving the heat exchange efficiency of the heat exchange tube, and solving the problem that the existing tubular heat exchanger cannot clean and flush dead corners and affects the overall heat exchange efficiency. The impurities cleaned by the cleaning brush are taken away by the flushing of water flow, further improving the cleaning effect. Impurities are prevented from being trapped on the outer wall of the heat exchange tube and affecting the heat transfer efficiency of the heat exchange tube. The heat exchange efficiency of the tubular heat exchanger is maintained by regular cleaning, thereby achieving the effect of energy saving and emission reduction; 2. The present invention realizes the function of driving the bracket to move by means of a reciprocating screw, a support plate and a telescopic chain protective cover. The operator connects the motor or other driving source to the first rotating shaft to drive the first rotating shaft to rotate. The first rotating shaft drives the second rotating shaft through a transmission belt. The second rotating shaft drives the transmission shaft and the reciprocating screw to rotate through a bevel gear. Then, the reciprocating screw drives the bracket threadedly connected thereto to move back and forth. When the bracket moves, it pushes or pulls the telescopic chain protective covers on both sides to extend and retract, maintaining the protection of the reciprocating screw by the telescopic chain protective cover. In addition, the protection of the reciprocating screw by the telescopic chain protective cover can prevent impurities in the heat exchange medium from accumulating on the reciprocating screw during operation. 3. The present invention achieves the function of driving the oscillating tube to oscillate periodically through the first lever, the mounting ring, and the second lever, and then drives the cleaning brush to oscillate through the oscillating tube, thereby improving the cleaning effect of the cleaning brush. When the reciprocating screw rotates, it drives the mounting ring to rotate, and at the same time, the reciprocating screw drives the bracket threadedly connected to it to move, and the bracket also drives the mounting ring to move when it moves, so that the mounting ring rotates during the movement. During the rotation of the mounting ring, the second lever on the mounting ring contacts the first lever on the oscillating tube and pushes the first lever, which in turn drives the oscillating tube to rotate. When the second lever separates from the first lever, the first lever is no longer under pressure, and the oscillating tube resets under the elastic force of the torsion spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional schematic diagram of an easy-to-clean tubular heat exchanger applied for by the present invention; Figure 2This is a three-dimensional schematic diagram of the internal structure of a middle tube of an easy-to-clean tubular heat exchanger applied for by the present invention; Figure 3 This is a three-dimensional schematic diagram of a linear drive assembly, a bracket, and a swing mechanism of an easy-to-clean tubular heat exchanger according to the present invention; Figure 4 This is a three-dimensional schematic diagram of a bracket, a cleaning brush, a rotating gear and a gear ring of an easy-to-clean tubular heat exchanger applied for by the present invention; Figure 5 This is a three-dimensional schematic diagram of a cleaning brush for an easy-to-clean tubular heat exchanger during the disassembly and assembly process of the present invention; Figure 6 This is a three-dimensional schematic diagram of the cooperation between the mounting ring and the swing block of an easy-to-clean tubular heat exchanger applied for by the present invention; Figure 7 This is a three-dimensional schematic diagram of the cooperation between a linear drive assembly and a cleaning pipe of an easy-to-clean tubular heat exchanger applied for by the present invention; Figure 8 This is a three-dimensional exploded schematic diagram of an easy-to-clean cleaning brush for a tubular heat exchanger according to the present invention; Figure 9 This is a three-dimensional exploded schematic diagram of a connection assembly of an easy-to-clean tubular heat exchanger according to the present invention; Figure 10 This is a three-dimensional schematic diagram of a control assembly of an easy-to-clean tubular heat exchanger according to the present invention; Figure 11 The present invention is a three-dimensional schematic diagram of a head, a bracket and a sealed cabin of an easy-to-clean tubular heat exchanger.

[0018] The numbers in the figure are: 1, middle pipe; 11, head; 12, linear drive assembly; 121, reciprocating screw; 122, support plate; 1221, first rotating shaft; 1222, first pulley; 123, telescopic chain guard; 13, cleaning pipe; 14, heat exchange tube; 15, second rotating shaft; 151, second pulley; 16, transmission belt; 17, transmission shaft; 18, bevel gear; 2, bracket; 21, cleaning brush; 211, first brush body; 2111, first magnetic strip; 212, second brush body; 21 21. Second magnetic strip; 213. Guide portion; 2131. Slot; 22. Connecting assembly; 221. Ring frame; 2211. Limit block; 222. Magnetic block; 223. Support; 2231. Block; 2232. Elastic member; 23. Control assembly; 231. Guide rod; 232. Handle; 3. Swing mechanism; 31. Swing tube; 311. Sprinkler head; 312. First lever; 32. Mounting ring; 321. Second lever; 33. Rotating gear; 34. Gear ring; 35. Sealed cabin. DETAILED DESCRIPTION

[0019] In order to further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] Reference Figures 1-4 : A tubular heat exchanger that is easy to clean, comprising a middle tube 1 with a built-in heat exchange tube 14, with both ends of the middle tube 1 respectively connected to a head 11 through a flange; a bracket 2 that can move along the axial direction of the middle tube 1 is provided in the middle tube 1, and a cleaning brush 21 for cleaning the outer wall of the heat exchange tube 14 is provided on the bracket 2; a linear drive component 12 and a cleaning pipe 13 are provided on the middle tube 1, and the linear drive component 12 converts kinetic energy generated by the impact of water flow in the cleaning pipe 13 into mechanical energy to drive the bracket 2 to move; a swing tube 31 is coaxially connected to the cleaning brush 21, and a nozzle 311 connected to the cleaning pipe 13 is provided on the swing tube 31; a swing mechanism 3 for controlling the rotation of the swing tube 31 is provided on the bracket 2; when the linear drive component 12 drives the bracket 2 and the cleaning brush 21 to move, the swing mechanism 3 controls the swing tube 31 to swing circumferentially along the heat exchange tube 14.

[0021] The present invention utilizes a bracket 2, a cleaning brush 21, and an oscillating tube 31 to enhance cleaning effectiveness. By controlling the swinging motion of the cleaning brush 21 and coordinating with the nozzle, the cleaning efficiency of blind spots is enhanced. The nozzle prevents impurities from adhering to the cleaning brush, thus avoiding damage to the heat exchange tubes 14 during the cleaning process. This improves the heat exchange efficiency of the heat exchange tubes 14 and addresses the problem of existing tubular heat exchangers being unable to clean and flush blind spots, thus affecting overall heat exchange efficiency. Both the middle tube 1 and the end cap 11 are equipped with liquid inlet and outlet pipes, with the ends of the heat exchange tubes 14 connected to the two end caps 11. During heat exchange, the primary medium enters through the liquid inlet of one end cap 11, flows through the heat exchange tube 14 into the other end cap 11, and exits through the liquid outlet pipe on that end cap 11. The secondary medium enters through the liquid inlet of the middle tube 1, contacts the heat exchange tubes 14, transfers heat through the heat exchange tubes 14, exchanges heat with the primary medium, and then exits through the liquid outlet pipe on the middle tube 1. In order to improve the heat transfer efficiency of the heat exchange tube 14, it is necessary to regularly clean the impurities adhering to the surface of the heat exchange tube 14. The cleaning methods are mainly divided into two types: chemical method and physical method. The physical cleaning method is mainly cleaned by flushing with a water gun. However, during flushing, not only are there a large number of cleaning dead corners, but the middle tube 1 also needs to be removed to expose the heat exchange tube 14 for cleaning, which is extremely cumbersome. For this reason, a tubular heat exchanger integrated with a bracket 2 and a swing mechanism 3 is provided. When cleaning, the operator connects the water outlet of the water gun to the cleaning pipe 13. The linear drive assembly 12 converts the kinetic energy generated by the high-intensity water flow sprayed by the water gun into mechanical energy to drive the bracket 2 to move, and the bracket 2 drives the cleaning brush 21 to move, and the cleaning brush 21 is used to clean the pipe surface. During this process, the swing mechanism 3 controls the swing tube 31 to swing, and the swing tube 31 drives the cleaning brush 21 to swing, so that the cleaning brush 21 swings back and forth while the bracket 2 moves, thereby improving the cleaning effect of the cleaning brush 21. At the same time, water within the cleaning tube 13 is ejected through the nozzle 311 on the oscillating tube 31, flushing away impurities removed by the cleaning brush 21, further improving the cleaning effect. This prevents impurities from being trapped on the outer walls of the heat exchange tubes 14 and affecting their heat transfer efficiency. Regular cleaning maintains the efficient heat transfer of the tubular heat exchanger, thereby achieving energy conservation and emission reduction.

[0022] Reference Figure 2 、 Figure 3 and Figure 5 : The linear drive assembly 12 includes a reciprocating screw 121, a support plate 122 and a telescopic chain protective cover 123 for protecting the reciprocating screw 121; the reciprocating screw 121 is rotatably set on the head 11, and the bracket 2 is threadedly connected to the reciprocating screw 121; the support plate 122 is connected to the inner wall of the cleaning pipe 13, and a first rotating shaft 1221 is rotatably set on the support plate 122. When the first rotating shaft 1221 rotates, the torque is transmitted to the reciprocating screw 121 to drive the reciprocating screw 121 to rotate; the telescopic chain protective cover 123 is set in the middle tube 1.

[0023] The present invention realizes the function of driving the bracket 2 to move by means of a reciprocating screw 121, a support plate 122 and a telescopic chain guard 123. The axis of the first rotating shaft 1221 is colinear with the axis of the cleaning pipe 13. A first pulley 1222 is sleeved on the first rotating shaft 1221, and a second rotating shaft 15 is provided for rotation inside the head 11. A second pulley 151 is sleeved on the second rotating shaft 15, and a transmission belt 16 is sleeved on the first pulley 1222. The first pulley 1222 and the second pulley 151 are connected by the transmission belt 16; the reciprocating screw 121 is coaxially connected to a transmission shaft 17, and a bevel gear 18 is sleeved on the transmission shaft 17 and the second rotating shaft 15, and the two bevel gears 18 are meshed and connected. A storage compartment for accommodating the telescopic chain guard 123 is provided at the head 11. When the bracket 2 moves to the position of the head 11 at both ends, the telescopic chain guard 123 retracts into the storage compartment. When cleaning the heat exchange tube 14, the operator connects a motor or other drive source to the first rotating shaft 1221 to drive the first rotating shaft 1221 to rotate. The first rotating shaft 1221 drives the second rotating shaft 15 through the transmission belt 16. The second rotating shaft 15 drives the transmission shaft 17 and the reciprocating screw 121 to rotate through the bevel gear 18. The reciprocating screw 121 then drives the bracket 2 threadedly connected thereto to move back and forth. When the bracket 2 moves, it pushes or pulls the telescopic chain guards 123 on both sides to extend and retract, keeping the telescopic chain guards 123 protecting the reciprocating screw 121. In addition, the protection of the reciprocating screw 121 by the telescopic chain guards 123 can prevent impurities in the heat exchange medium from accumulating on the reciprocating screw 121 during operation.

[0024] Reference Figure 3 and Figure 4 : The swing tube 31 is rotatably connected to the bracket 2 through a torsion spring, and a first shift rod 312 is provided on the swing tube 31; a mounting ring 32 is rotatably provided on the bracket 2, and when the reciprocating screw rod 121 rotates, the mounting ring 32 is driven to rotate synchronously; a second shift rod 321 is provided on the mounting ring 32, and during the rotation of the mounting ring 32, when the second shift rod 321 contacts the first shift rod 312, it pushes the first shift rod 312 and the swing tube 31 to rotate.

[0025] The present invention utilizes a first lever 312, a mounting ring 32, and a second lever 321 to drive the oscillating tube 31 into periodic oscillation. This, in turn, drives the cleaning brush 21 to oscillate, improving the cleaning efficiency of the cleaning brush 21. At least three heat exchange tubes 14 are provided within the center tube 1, and multiple cleaning brushes 21 are provided, one corresponding to each heat exchange tube 14. Each cleaning brush 21 is coaxially connected to an oscillating tube 31. The first lever 312 is provided on the oscillating tube 31 adjacent to the mounting ring 32. When the reciprocating screw 121 rotates, it drives the mounting ring 32 to rotate. Simultaneously, the reciprocating screw 121 moves the bracket 2, to which it is threaded. This movement of the bracket 2 also drives the mounting ring 32, causing the mounting ring 32 to rotate during movement. During the rotation of the mounting ring 32, the second lever 321 on the mounting ring 32 contacts the first lever 312 on the oscillating tube 31, pushing the first lever 312, which in turn drives the oscillating tube 31 to rotate. When the second deflector rod 321 is separated from the first deflector rod 312 , the first deflector rod 312 is no longer under pressure, and the swing tube 31 is reset under the elastic force of the torsion spring.

[0026] Reference Figure 3 、 Figure 4 and Figure 6 : A rotating gear 33 is rotatably provided on the bracket 2, and a plurality of rotating gears 33 are provided and correspond one to one with the heat exchange tubes 14; a gear ring 34 is rotatably provided on the bracket 2, and a plurality of rotating gears 33 are meshed and connected with the gear ring 34.

[0027] The present invention achieves the function of controlling the synchronous rotation of multiple oscillating tubes 31 through the use of rotating gears 33 and gear rings 34. The outer and inner rings of the gear ring 34 are both provided with annular continuous teeth. The outer and inner rings of the gear ring 34 are respectively meshed with a group of rotating gears 33, and the multiple rotating gears 33 in the same group are equidistant from the axis of the middle tube 1. One rotating gear 33 in the innermost ring is meshed with the rotating gear 33 located outside it. When the mounting ring 32 rotates and pushes the first lever 312 on the oscillating tube 31, the oscillating tube 31 drives the cleaning brush 21 to rotate, and the cleaning brush 21 drives the rotating gear 33 to rotate. The rotating gear 33 drives the remaining rotating gears 33 meshed with the gear ring 34 to rotate through the gear ring 34. The rotating gear 33 in the innermost ring also swings in the opposite direction driven by the rotating gear 33 in the outer ring.

[0028] Reference Figure 5 、 Figure 6 、 Figure 8 and Figure 9 : The cleaning brush 21 includes a first brush body 211 and a second brush body 212, and the first brush body 211 and the second brush body 212 are both provided with a guide portion 213; the inner ring of the swing tube 31 is provided with a slide groove that cooperates with the guide portion 213; the swing tube 31 is provided with a connecting component 22 for connecting the swing tube 31 and the cleaning brush 21.

[0029] The present invention utilizes a first brush body 211, a second brush body 212, a guide portion 213, and a connecting assembly 22 to facilitate operator maintenance of the cleaning brush 21. However, as the cleaning brush 21 is used, a significant amount of impurities may adhere to it. Therefore, the cleaning brush 21 is provided as a separate component. To clean or replace the cleaning brush 21, the operator first disconnects the connecting assembly 22 and then removes the cleaning brush 21 from the bracket 2. After removal, the operator separates the first brush body 211 and the second brush body 212, making it easier for the operator to remove the cleaning brush 21. After maintenance is complete, the operator aligns the first brush body 211 with the second brush body 212, then aligns the guide portions 213 on the first and second brush bodies 211, 212 with the guide grooves on the oscillating tube 31 to precisely install the cleaning brush 21. Once the cleaning brush 21 is in place, the oscillating tube 31 and the cleaning brush 21 are connected via the connecting assembly 22.

[0030] Reference Figure 9 and Figure 10 : An annular frame 221 is rotatably provided on the bracket 2, and a limit block 2211 is provided on the annular frame 221 for limiting the movement of the cleaning brush 21.

[0031] The present invention achieves the function of limiting the movement of the cleaning brush 21 through the annular frame 221 and the limit block 2211. The annular frame 221 is coaxially connected to the rotating gear 33. The first brush body 211 and the second brush body 212 are both provided with a magnetic block 222 that can be adsorbed by the limit block 2211. When installing the cleaning brush 21, the operator first aligns the first brush body 211 and the second brush body 212, then aligns the guide portion 213 on the first brush body 211 and the second brush body 212 with the slide groove on the swing tube 31, and then inserts the first brush body 211 and the second brush body 212 until the magnetic block 222 on the first brush body 211 and the second brush body 212 are adsorbed and matched with the limit block 2211 under the action of magnetic force, thereby completing the installation of the cleaning brush 21.

[0032] Reference Figure 9 and Figure 10 : A support 223 is installed on the swing tube 31, and a block 2231 and an elastic member 2232 are provided on the support 223, and the two ends of the elastic member 2232 are respectively connected to the block 2231 and the support 223; a groove is provided on the guide portion 213 of the first brush body 211 and the second brush body 212, and after the first brush body 211 and the second brush body 212 are assembled, the two grooves cooperate to form a groove 2131 for plugging and cooperating with the block 2231; a control component 23 for controlling the separation of the block 2231 and the groove 2131 is provided on the support 223.

[0033] The present invention utilizes a clamping block 2231, an elastic member 2232, and a slot 2131 to prevent the cleaning brush 21 from separating from the support 223. The positioning block 2211 allows the cleaning brush 21 to be steadily pushed to move synchronously when the support 2 moves away from the positioning block 2211. However, when the support 2 moves toward the positioning block 2211, the magnetic field of the magnetic block 222 exerts a pulling force on the cleaning brush 21. However, friction between the cleaning brush 21 and the impurity support 2 creates a risk of the brush 21 falling off. To address this issue, the support 223, clamping block 2231, and elastic member 2232 are provided. When the operator inserts the cleaning brush 21 into the support 2, the guide portions 213 of the first and second brush bodies 211, 212 contact the clamping block 2231, squeezing the clamping block 2231 and compressing the elastic member 2232 under the pressure. When the block 2231 is aligned with the slot 2131, the block 2231 engages with the slot 2131 under the elastic force of the elastic member 2232. The engagement between the block 2231 and the slot 2131 prevents the cleaning brush 21 from being removed from the bracket 2. To remove the cleaning brush 21, the operator first controls the block 2231 via the control assembly 23 to retract. The elastic member 2232 is compressed under pressure, separating the block 2231 from the slot 2131. The cleaning brush 21 can then be removed.

[0034] Reference Figure 9 and Figure 10 : The control assembly 23 includes a guide rod 231 and a handle 232; the guide rod 231 is slidably mounted on the support 223, and the ends of the guide rod 231 are respectively connected to the block 2231 and the handle 232.

[0035] The present invention utilizes a guide rod 231 and a handle 232 to control the movement of the support 223. To remove the cleaning brush 21, the operator grasps the handle 232 and then pulls the block 2231 via the guide rod 231. This compresses the elastic member 2232, separating the block 2231 from the slot 2131. The cleaning brush 21 is then removed.

[0036] Reference Figure 5 、 Figure 6 and Figure 8 : The first brush body 211 and the second brush body 212 are respectively connected to a first magnetic strip 2111 and a second magnetic strip 2121 that can attract each other.

[0037] The present invention utilizes a first magnetic strip 2111 and a second magnetic strip 2121 to achieve rapid assembly of the first brush body 211 and the second brush body 212. The first brush body 211 is provided with a raised portion, and the second brush body 212 is provided with a groove that mates with the raised portion. When the raised portion of the first brush body 211 aligns with the groove of the second brush body 212, the first magnetic strip 2111 and the second magnetic strip 2121 are aligned. When installing the cleaning brush 21, the operator first aligns the first brush body 211 and the second brush body 212, ensuring that the raised portion of the first brush body 211 engages with the groove of the second brush body 212. The first magnetic strip 2111 and the second magnetic strip 2121 maintain assembly stability.

[0038] Reference Figure 11 A sealed cabin 35 is provided on one side of the middle tube 1 near the gear ring 34. When the bracket 2 cooperates with the sealed cabin 35, a closed space is formed to protect the rotating gear 33 and the gear ring 34.

[0039] The present invention utilizes multiple sets of brackets 2 to facilitate operator access to the oscillating tube 31 and the cleaning tube 13. During normal operation of the heat exchanger, to prevent the brackets 2 from interfering with heat exchange, after cleaning, the brackets 2 are controlled to move to the sealed chamber 35, ensuring a tight fit between them. Furthermore, a stopper 2211 on the annular bracket 221 seals the communication channel between the cleaning brush 21 and the sealed chamber 35. This prevents the brackets 2 from interfering with heat exchange and prevents the heat exchange medium from penetrating the sealed chamber 35 through the cleaning brush 21.

[0040] The above embodiments merely represent one or more embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An easy-to-clean tubular heat exchanger, comprising a middle tube (1) with a built-in heat exchange tube (14), wherein both ends of the middle tube (1) are connected to a head (11) via a flange; a bracket (2) that can move along the axis of the middle tube (1) is provided in the middle tube (1), and a cleaning brush (21) for cleaning the outer wall of the heat exchange tube (14) is provided on the bracket (2); the characteristics are: The middle tube (1) is provided with a linear drive assembly (12) and a cleaning tube (13). The linear drive assembly (12) converts kinetic energy generated by the impact of water flow in the cleaning tube (13) into mechanical energy to drive the bracket (2) to move. The cleaning brush (21) is coaxially connected to a swing tube (31). The swing tube (31) is provided with a nozzle (311) connected to the cleaning tube (13). The bracket (2) is provided with a swing mechanism (3) for controlling the rotation of the swing tube (31). When the linear drive assembly (12) drives the bracket (2) and the cleaning brush (21) to move, the swing mechanism (3) controls the swing tube (31) to swing along the circumference of the heat exchange tube (14).

2. The easy-to-clean tubular heat exchanger according to claim 1, characterized in that: The linear drive assembly (12) comprises a reciprocating screw (121) and a support plate (122); the reciprocating screw (121) is rotatably mounted on the head (11), and the bracket (2) is threadedly connected to the reciprocating screw (121); the support plate (122) is connected to the inner wall of the cleaning pipe (13), and a first rotating shaft (1221) is rotatably mounted on the support plate (122); when the first rotating shaft (1221) rotates, torque is transmitted to the reciprocating screw (121) to drive the reciprocating screw (121) to rotate.

3. The easy-to-clean tubular heat exchanger according to claim 2, characterized in that: The swing tube (31) is rotatably connected to the bracket (2) via a torsion spring, and a first shifting rod (312) is provided on the swing tube (31); a mounting ring (32) is rotatably provided on the bracket (2), and when the reciprocating screw rod (121) rotates, the mounting ring (32) is driven to rotate synchronously; a second shifting rod (321) is provided on the mounting ring (32), and when the second shifting rod (321) contacts the first shifting rod (312) during the rotation process of the mounting ring (32), the first shifting rod (312) and the swing tube (31) are pushed to rotate.

4. The easy-to-clean tubular heat exchanger according to claim 3, characterized in that: A rotating gear (33) is rotatably provided on the bracket (2), and a plurality of rotating gears (33) are provided and correspond one to one with the heat exchange tubes (14); a gear ring (34) is rotatably provided on the bracket (2), and the plurality of rotating gears (33) are all meshedly connected with the gear ring (34).

5. The easy-to-clean tubular heat exchanger according to claim 1, characterized in that: The cleaning brush (21) comprises a first brush body (211) and a second brush body (212), wherein the first brush body (211) and the second brush body (212) are both provided with a guide portion (213); the inner ring of the oscillating tube (31) is provided with a slide groove that cooperates with the guide portion (213); and the oscillating tube (31) is provided with a connecting assembly (22) for connecting the oscillating tube (31) and the cleaning brush (21).

6. The easy-to-clean tubular heat exchanger according to claim 5, characterized in that: An annular frame (221) is rotatably provided on the bracket (2), and a limiting block (2211) for limiting the movement of the cleaning brush (21) is provided on the annular frame (221).

7. The easy-to-clean tubular heat exchanger according to claim 6, characterized in that: A support (223) is mounted on the swing tube (31), and a clamping block (2231) and an elastic member (2232) are provided on the support (223), with both ends of the elastic member (2232) being connected to the clamping block (2231) and the support (223), respectively. Grooves are provided on the guide portions (213) of the first brush body (211) and the second brush body (212), and after the first brush body (211) and the second brush body (212) are assembled, the two grooves cooperate to form a clamping slot (2131) for plugging and mating with the clamping block (2231). A control assembly (23) for controlling the separation of the clamping block (2231) and the clamping slot (2131) is provided on the support (223).

8. The easy-to-clean tubular heat exchanger according to claim 7, characterized in that: The control assembly (23) includes a guide rod (231) and a handle (232); the guide rod (231) is slidably mounted on the support (223), and two ends of the guide rod (231) are respectively connected to the clamping block (2231) and the handle (232).

9. The easy-to-clean tubular heat exchanger according to claim 5, characterized in that: The first brush body (211) and the second brush body (212) are respectively connected to a first magnetic strip (2111) and a second magnetic strip (2121) that can attract each other.

10. The easy-to-clean tubular heat exchanger according to claim 4, characterized in that: A sealing chamber (35) is provided on one side of the middle tube (1) close to the gear ring (34). When the bracket (2) and the sealing chamber (35) cooperate, a sealed space is formed for protecting the rotating gear (33) and the gear ring (34).

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