A high-efficiency online cleaning device for heat exchanger

Abstract

The application discloses a kind of high-efficiency online cleaning device of heat exchanger, it is related to heat exchanger cleaning technical field, including fixed cylinder, the opening top and bottom of fixed cylinder are equipped with the fixed mechanism connected with the end of heat exchange tube shell;The inner side wall of fixed cylinder is fixedly provided with first electric push rod, and the moving end of first electric push rod is fixedly provided with mounting plate, and the side of mounting plate away from first electric push rod is fixedly provided with motor.The application can realize the comprehensive cleaning of the inner wall of heat exchanger shell, solve the problem that traditional manual cleaning is easy to leave dead angle and is not fully covered;At the same time, it can be targeted to enhance the cleaning intensity of the inner wall of the bottom of heat exchanger shell, effectively strip the stubborn dirt deposited at the bottom due to gravity, ensure that the cleaning quality of the bottom and other areas is consistent;In addition, it can timely push the medicine water accumulated in the bottom of shell after cleaning, prevent residual medicine water from causing corrosion to the cleaned inner wall of shell, avoid dirt secondary crystallization deposition.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger cleaning technology, and more specifically to a high-efficiency online cleaning device for heat exchangers. Background Technology

[0002] In industrial production, shell-and-tube heat exchangers are key equipment for achieving heat exchange between media and are widely used in chemical, petroleum, and HVAC fields. Their overall operating efficiency is closely related to the cleanliness of each component. Among them, the heat exchanger shell, as the core component that carries the shell-side fluid and protects the internal heat exchange structure, has a direct impact on the flowability of the shell-side fluid, heat exchange efficiency, and equipment safety due to the cleanliness of its inner wall. If scale, oil, corrosion products, and other dirt adhere to the inner wall of the shell, it will reduce the shell-side flow space, increase fluid resistance, and may also reduce the heat exchange effect due to the heat insulation effect of the dirt. Long-term accumulation is more likely to cause localized shell-side corrosion, threatening the safe operation of the equipment.

[0003] Currently, the industry still mainly relies on traditional manual operation for cleaning the inner wall of heat exchanger shells. This involves manually holding a high-pressure nozzle and inserting it into an opening on one side of the heat exchanger shell for rinsing. Due to the large internal space of the heat exchanger shell, this cleaning method is inefficient and consumes a lot of manpower and time. In addition, the cleaning effect depends on the operator's experience. Manually holding the nozzle makes it difficult to ensure uniform rinsing pressure and comprehensive coverage, which can easily create cleaning dead spots on the inner wall of the heat exchanger shell, resulting in dirt residue and failing to achieve overall cleanliness of the inner wall of the heat exchanger shell.

[0004] Therefore, a high-efficiency online cleaning device for heat exchangers is proposed. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a high-efficiency online cleaning device for heat exchangers, which aims to solve the problem of low cleaning efficiency and quality of the inner wall of existing heat exchanger shells.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency online cleaning device for heat exchangers, comprising a fixed cylinder, wherein the top and bottom of the opening of the fixed cylinder are provided with fixing mechanisms that are connected to the ends of the heat exchange tube shell;

[0008] The inner wall of the fixed cylinder is fixedly provided with a first electric push rod, the moving end of the first electric push rod is fixedly provided with a mounting plate, the side of the mounting plate away from the first electric push rod is fixedly provided with a motor, the output end of the motor is fixedly provided with a rotating tube, and the end of the rotating tube away from the motor is provided with a cleaning mechanism.

[0009] The outer side wall of the fixed cylinder is provided with a medicine supply mechanism connected with the rotating pipe, and the medicine supply mechanism is communicated with the cleaning mechanism;

[0010] The pipe wall of the rotating pipe is provided with a bottom pressure boost trigger mechanism connected with the side of the mounting plate, and the bottom pressure boost trigger mechanism is linked with the cleaning mechanism;

[0011] The bottom of the mounting plate is provided with a water pushing mechanism, and the water pushing mechanism can push the medicine water on the inner wall of the bottom of the heat exchange pipe shell;

[0012] The outer side wall of the fixed cylinder is fixedly provided with a PLC controller, and the first electric push rod, the motor, the cleaning mechanism, the medicine supply mechanism, the bottom pressure boost trigger mechanism and the water pushing mechanism are electrically connected with the PLC controller.

[0013] As a preferred scheme of the heat exchanger efficient online cleaning device, the fixing mechanism comprises an L-shaped fixing plate fixedly arranged at the opening of the fixed cylinder, the vertical part side wall of the L-shaped fixing plate is screw-threaded with a screw rod, one end of the screw rod is rotationally provided with a jacking plate, and the other end of the screw rod is fixedly provided with a handle.

[0014] As a preferred scheme of the heat exchanger efficient online cleaning device, the opening of the fixed cylinder is provided with a guide jacking groove, and the guide jacking groove is arranged in a clamping mode with the opening of the end part of the heat exchange pipe shell, and the guide jacking groove is used in cooperation with the jacking plate.

[0015] As a preferred scheme of the heat exchanger efficient online cleaning device, the cleaning mechanism comprises a hollow rotating rod fixedly arranged at the end part of the rotating pipe, one end of the hollow rotating rod away from the rotating pipe is fixedly provided with a second electric push rod, the moving end of the second electric push rod is fixedly provided with a pressure sensor, the top of the pressure sensor is fixedly provided with a hollow cleaning plate, the hollow cleaning plate is an arc-shaped plate, two rubber medicine guide tubes are symmetrically fixed between the hollow rotating rod and the hollow cleaning plate, cleaning brushes are fixedly arranged at the top of the two sides of the hollow cleaning plate, and a high-pressure nozzle is fixedly arranged at the top center of the hollow cleaning plate.

[0016] As a preferred scheme of the heat exchanger efficient online cleaning device, the medicine supply mechanism comprises a medicine supply box fixedly arranged on the outer side wall of the fixed cylinder, the output end of the pump body in the interior of the medicine supply box is fixedly provided with an outwardly extending medicine supply bellows, the pipe wall of the rotating pipe is rotationally provided with a hollow medicine guide disc, a first fixing rod is fixed between the side wall of the hollow medicine guide disc and the side of the mounting plate, one end of the medicine supply bellows away from the medicine supply box is fixedly connected with the side wall of the hollow medicine guide disc, and the pipe wall of the rotating pipe and located in the hollow medicine guide disc is provided with a medicine guide hole.

[0017] As a preferred scheme of the heat exchanger efficient online cleaning device, the bottom pressurization trigger mechanism comprises a hollow fixed disc rotatably arranged on the rotating pipe, a second fixed rod is fixedly arranged between the side wall of the hollow fixed disc and the side of the mounting plate, a trigger rod is fixedly arranged on the pipe wall of the rotating pipe and located in the hollow fixed disc, two elastic expansion rods are symmetrically fixedly arranged on the inner wall of the bottom of the hollow fixed disc, one and the same arc-shaped trigger plate is fixedly arranged at the ends of the two elastic expansion rods away from the inner wall of the hollow fixed disc, a rubber trigger head is fixedly arranged at the bottom of the arc-shaped trigger plate, and a trigger switch is fixedly arranged on the inner wall of the bottom of the hollow fixed disc and corresponds to the position of the rubber trigger head.

[0018] As a preferred scheme of the heat exchanger efficient online cleaning device, the end of the trigger rod away from the rotating pipe is in a pointed structure, and the two sides of the arc-shaped trigger plate are provided with arc-shaped chamfers.

[0019] As a preferred scheme of the heat exchanger efficient online cleaning device, the water pushing mechanism comprises a third electric push rod fixedly arranged at the bottom of the mounting plate, and a flexible water pushing plate is fixedly arranged at the moving end of the third electric push rod and is in an arc-shaped plate.

[0020] In summary, the present application has at least one of the following beneficial effects:

[0021] 1、The first electric push rod, the motor, the cleaning mechanism and the medicine supply mechanism are linked, the first electric push rod intermittently extends to drive the cleaning mechanism to move along the axis of the shell, the motor drives the cleaning brush to rotate and wipe, the medicine supply mechanism synchronously sprays the medicine through the high-pressure nozzle, a cooperative cleaning mode of "moving + rotating + spraying" is formed, each area of the inner wall of the shell can be covered, the problem that traditional manual cleaning is easy to leave dead angles and is not fully covered is solved, the overall cleanliness of the inner wall of the shell of the heat exchanger is ensured, and the fluid flowability and the heat exchange efficiency of the heat exchanger are restored.

[0022] 2、The bottom pressurization trigger mechanism is arranged, when the cleaning brush is rotated to the bottom along with the rotating pipe, the trigger rod presses down the arc-shaped trigger plate and triggers the switch, the PLC controller immediately controls the second electric push rod to increase the extension amount to increase the wiping pressure of the brush, at the same time, the power of the medicine supply pump body is increased to enhance the flushing force of the nozzle, the cleaning problem of stubborn dirt deposited at the bottom of the shell of the heat exchanger due to gravity is solved, the cleaning quality of the bottom is ensured to be consistent with that of other areas, and the residual dirt at the bottom is avoided to cause subsequent corrosion or a decrease in the heat exchange efficiency.

[0023] 3、The present application through the water pushing mechanism and the first electric push rod synchronous action, the third electric push rod pushes the flexible water pushing plate to adhere to the bottom inner wall of the heat exchanger shell, with the first electric push rod intermittent movement will the medicine water accumulated in the bottom push to the outlet along the axial direction, prevent the corrosive components in the residual medicine water long time stay to cause the clean inner wall pitting, mottle and other damage, at the same time avoid medicine water evaporation leads to dirt secondary crystallization deposition, also can prevent medicine water local concentration rise to heat exchanger shell base material excessive erosion, effectively protect the heat exchanger shell structural integrity, prolong the service life of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the present application or prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0025] Figure 1 It is a front perspective structure schematic diagram of the present application;

[0026] Figure 2 It is a back perspective structure schematic diagram of the present application;

[0027] Figure 3 It is a perspective structure schematic diagram of the present application after cutting open;

[0028] Figure 4 It is a perspective structure schematic diagram of the cleaning mechanism and the local medicine supply mechanism in the present application;

[0029] Figure 5 It is a perspective structure schematic diagram of the bottom pressure boosting trigger mechanism in the present application;

[0030] Figure 6 It is a perspective structure schematic diagram of the first electric push rod moving end part in the present application;

[0031] Figure 7 It is a perspective structure schematic diagram of the fixed cylinder and the heat exchange pipe shell connection in the present application.

[0032] Explanation of reference signs:

[0033] 1, fixed cylinder; 2, fixed mechanism; 21, L-shaped fixed plate; 22, screw rod; 23, tightening plate; 24, handle; 3, first electric push rod; 4, mounting plate; 5, motor; 6, rotating tube; 7, cleaning mechanism; 71, hollow rotating rod; 72, second electric push rod; 73, pressure sensor; 74, hollow cleaning plate; 75, rubber medicine guide tube; 76, cleaning brush; 77, high-pressure nozzle; 8, medicine supply mechanism; 81, medicine supply box; 82, medicine supply bellows; 83, hollow medicine guide disc; 84, first fixed rod; 85, medicine guide hole; 9, bottom pressure boost trigger mechanism; 91, hollow fixed disc; 92, second fixed rod; 93, trigger rod; 94, elastic telescopic rod; 95, arc-shaped trigger plate; 96, rubber trigger head; 97, trigger switch; 10, water pushing mechanism; 101, third electric push rod; 102, flexible water pushing plate; 11, PLC controller; 12, guide and tightening groove. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] The present application discloses a high-efficiency online cleaning device for heat exchanger.

[0036] Reference Figures 1-7 A high-efficiency online cleaning device for heat exchanger is provided, which comprises a fixed cylinder 1, the open top and bottom of the fixed cylinder 1 are provided with fixed mechanisms 2 connected with the end part of the heat exchange tube shell, the fixed mechanism 2 comprises an L-shaped fixed plate 21 fixedly arranged at the opening of the fixed cylinder 1, the vertical part side wall of the L-shaped fixed plate 21 is provided with a screw rod 22 in screw thread, one end of the screw rod 22 is rotatably provided with a tightening plate 23, and the other end of the screw rod 22 is fixedly provided with a handle 24, the opening of the fixed cylinder 1 is provided with a guide and tightening groove 12, and the guide and tightening groove 12 is connected with the end opening of the heat exchange tube shell in a clamping manner, the guide and tightening groove 12 is used in cooperation with the tightening plate 23, the inner wall of the guide and tightening groove 12 is an inclined surface, the staff manually rotates the handle 24, drives the screw rod 22 to rotate through the handle 24, the screw rod 22 pushes the tightening plate 23 to move in the process of rotating, until the tightening plate 23 tightly abuts against the side wall of the flange plate, at the same time, the guide and tightening groove 12 at the opening of the fixed cylinder 1 is attached to the end surface of the flange plate, so as to realize the stable connection between the fixed cylinder 1 and the heat exchanger shell.

[0037] The inner side wall of the fixed cylinder 1 is fixedly provided with a first electric push rod 3, and the moving end of the first electric push rod 3 is fixedly provided with a mounting plate 4. The side, away from the first electric push rod 3, of the mounting plate 4 is fixedly provided with a motor 5. The output end of the motor 5 is fixedly provided with a rotating pipe 6. The end, away from the motor 5, of the rotating pipe 6 is provided with a cleaning mechanism 7. The cleaning mechanism 7 comprises a hollow rotating rod 71 fixedly arranged at the end of the rotating pipe 6. The end, away from the rotating pipe 6, of the hollow rotating rod 71 is fixedly provided with a second electric push rod 72. The moving end of the second electric push rod 72 is fixedly provided with a pressure sensor 73. The second electric push rod 72 adopts a wireless electric push rod. The pressure sensor 73 adopts a wireless sensor. The phenomenon of wire entanglement of the rotating pipe 6, the second electric push rod 72 and the pressure sensor 73 is avoided. The second electric push rod 72 and the pressure sensor 73 both adopt a wireless Bluetooth module to complete signal transmission. The top of the pressure sensor 73 is fixedly provided with a hollow cleaning plate 74. The hollow cleaning plate 74 is an arc-shaped plate. Two rubber medicine guide tubes 75 are symmetrically fixed between the hollow rotating rod 71 and the hollow cleaning plate 74. Cleaning brushes 76 are fixedly arranged at the top of the two sides of the hollow cleaning plate 74. A high-pressure spray head 77 is fixedly arranged at the top center of the hollow cleaning plate 74. The outer side wall of the fixed cylinder 1 is provided with a medicine supply mechanism 8 connected with the rotating pipe 6. The medicine supply mechanism 8 communicates with the cleaning mechanism 7. The medicine supply mechanism 8 comprises a medicine supply box 81 fixedly arranged on the outer side wall of the fixed cylinder 1. The output end of the pump body in the medicine supply box 81 is fixedly provided with an outwardly extending medicine supply bellows 82. The pipe wall of the rotating pipe 6 is rotatably provided with a hollow medicine guide disc 83. A first fixing rod 84 is fixedly arranged between the side wall of the hollow medicine guide disc 83 and the side surface of the mounting plate 4. The end, away from the medicine supply box 81, of the medicine supply bellows 82 is fixedly connected with the side wall of the hollow medicine guide disc 83. The pipe wall of the rotating pipe 6 and the part located in the hollow medicine guide disc 83 are provided with medicine guide holes 85. The pump body in the medicine supply box 81 pressurizes and draws in the medicine supply bellows 82 after pressurizing the cleaning medicine arranged inside. The medicine is transported to the hollow medicine guide disc 83 through the medicine supply bellows 82. The hollow medicine guide disc 83 and the rotating pipe 6 are communicated through the medicine guide holes 85. The rotating pipe 6 and the hollow rotating rod 71 are communicated. The medicine is introduced into the hollow cleaning plate 74 through the hollow rotating rod 71 and the rubber medicine guide tube 75. Finally, the high-pressure spray head 77 on the hollow cleaning plate 74 uniformly sprays the inner wall of the shell.

[0038] The pipe wall of the rotating pipe 6 is provided with a bottom pressure boost trigger mechanism 9 connected with the side of the mounting plate 4, and the bottom pressure boost trigger mechanism 9 is linked with the cleaning mechanism 7, the bottom pressure boost trigger mechanism 9 comprises a hollow fixed disc 91 rotatably arranged on the rotating pipe 6, a second fixed rod 92 is fixedly arranged between the side wall of the hollow fixed disc 91 and the side of the mounting plate 4, a trigger rod 93 is fixedly arranged on the pipe wall of the rotating pipe 6 and located in the hollow fixed disc 91, two elastic expansion rods 94 are symmetrically fixedly arranged on the inner bottom wall of the hollow fixed disc 91, the same arc-shaped trigger plate 95 is fixedly arranged on the ends of the two elastic expansion rods 94 away from the inner wall of the hollow fixed disc 91, the end of the trigger rod 93 away from the rotating pipe 6 is in a pointed structure, the two sides of the arc-shaped trigger plate 95 are provided with arc-shaped chamfers, when the pointed structure contacts with the arc-shaped chamfer, the trigger rod 93 can push the arc-shaped trigger plate 95 to move downward, the rubber trigger head 96 is fixedly arranged on the bottom of the arc-shaped trigger plate 95, the trigger switch 97 is fixedly arranged on the inner bottom wall of the hollow fixed disc 91 and corresponds to the position of the rubber trigger head 96, the rotating pipe 6 drives the trigger rod 93 to move from the top to the bottom, when the trigger rod 93 rotates to the bottom, the pointed end thereof will first contact with the arc-shaped chamfer on one side of the arc-shaped trigger plate 95, with the continuous rotation of the rotating pipe 6, the arc-shaped trigger plate 95 is pushed to move downward along the vertical direction and compresses the elastic expansion rod 94, when the arc-shaped trigger plate 95 moves downward to a certain stroke, the rubber trigger head 96 will contact with the button of the trigger switch 97 arranged on the inner wall of the hollow fixed disc 91 and complete the trigger.

[0039] The bottom of the mounting plate 4 is provided with a water pushing mechanism 10, and the water pushing mechanism 10 can push the medicine water on the inner wall of the bottom of the heat exchange pipe shell, the water pushing mechanism 10 comprises a third electric push rod 101 fixedly arranged on the bottom of the mounting plate 4, a flexible water pushing plate 102 is fixedly arranged on the moving end of the third electric push rod 101, and the flexible water pushing plate 102 is in an arc-shaped plate, the third electric push rod 101 is extended to push the flexible water pushing plate 102 to contact with the inner wall of the heat exchanger shell, and the material characteristics (such as elastic rubber material) of the flexible water pushing plate 102 can avoid the hard abrasion to the inner wall of the heat exchanger shell.

[0040] The outer side wall of the fixed cylinder 1 is fixedly provided with a PLC controller 11, the first electric push rod 3, the motor 5, the cleaning mechanism 7, the medicine supplying mechanism 8, the bottom pressure boost trigger mechanism 9 and the water pushing mechanism 10 are electrically connected with the PLC controller 11.

[0041] Before the online cleaning operation of the shell of the shell-and-tube heat exchanger, the workers disassemble the shell covers at both ends of the heat exchanger one by one, take out the heat exchange tubes inside the shell (to avoid damage to the heat exchange tubes by the cleaning agent or water flow during the cleaning process, and to ensure that the cleaning space inside the shell is unobstructed), and then align the fixing cylinder 1 with the flange plate at one end of the heat exchanger shell. Special attention should be paid to the structure of the L-shaped fixing plates 21 at the top and bottom of the opening of the fixing cylinder 1, because the fixing plates will obstruct the direct insertion of the flange plate into the guide and clamping groove 12, so the two L-shaped fixing plates 21 need to be slowly sleeved from the side of the flange plate. After the fixing cylinder 1 is preliminarily positioned, the workers manually rotate the handle 24, which drives the screw rod 22 to rotate through the handle 24. During the rotation of the screw rod 22, the clamping plate 23 is pushed to move until the clamping plate 23 tightly abuts against the side wall of the flange plate, and at the same time, the guide and clamping groove 12 at the opening of the fixing cylinder 1 is in close contact with the end face of the flange plate, so as to realize the stable connection between the fixing cylinder 1 and the heat exchanger shell, prevent the equipment from shifting during the cleaning process and affecting the cleaning accuracy, and complete the fixation. After the fixation is completed, the power supply of the entire cleaning device is connected to ensure that the equipment is in normal standby state;

[0042] When entering the cleaning stage of the inner wall of the heat exchanger shell, the workers send operation instructions through the PLC controller 11. First, the first electric push rod 3 is started, and the moving end of the first electric push rod 3 slowly extends, synchronously driving the motor 5, the rotating pipe 6, the cleaning mechanism 7 and the water pushing mechanism 10 to move towards the inside of the heat exchanger shell. Then, the second electric push rod 72 and the third electric push rod 101 are synchronously controlled by the PLC controller 11. When the second electric push rod 72 extends, it drives the hollow cleaning plate 74 connected thereto to move towards the inner wall of the shell, so that the cleaning brushes 76 on the hollow cleaning plate 74 gradually come into contact with the inner wall of the shell. In this process, the pressure sensor 73 carried on the hollow cleaning plate 74 collects the contact pressure data of the cleaning brushes 76 and the inner wall in real time, and feeds the data back to the PLC controller 11. If the pressure value exceeds the preset safety range, the PLC controller 11 will automatically adjust the extension amount of the second electric push rod 72 to avoid excessive wear of the cleaning brushes 76 or damage to the inner wall of the shell due to excessive pressure. At the same time, the third electric push rod 101 synchronously extends and pushes the flexible water pushing plate 102 into contact with the inner wall of the heat exchanger shell. By utilizing the material characteristics (such as elastic rubber material) of the flexible water pushing plate 102, the inner wall of the heat exchanger shell is ensured to be in close contact while avoiding hard wear to the inner wall of the heat exchanger shell;

[0043] After the cleaning mechanism 7 and the water pushing mechanism 10 are in place, the staff operates the PLC controller 11 to synchronously start the motor 5 and the pump body in the medicine supply box 81. When the motor 5 operates, it drives the rotating tube 6 to rotate, which in turn drives the hollow rotating rod 71, the hollow cleaning plate 74 and the cleaning brush 76 at the end of the rotating tube 6 to rotate synchronously. The rotating cleaning brush 76 wipes the inner wall of the heat exchanger shell in all directions, stripping off stubborn dirt adhering to the inner wall. At the same time, the pump body in the medicine supply box 81 starts to pressurize the cleaning agent (such as a descaling agent, a cleaning agent) prepared inside and then draws it into the medicine supply bellows 82. The medicine is transported to the hollow medicine guide disc 83 through the medicine supply bellows 82, and the hollow medicine guide disc 83 is in communication with the rotating tube 6 through the medicine guide hole 85. The rotating tube 6 is in communication with the hollow rotating rod 71, and then the medicine is guided into the hollow cleaning plate 74 through the hollow rotating rod 71 and the rubber medicine guide tube 75. Finally, the medicine is uniformly sprayed onto the inner wall of the shell by the high-pressure spray head 77 on the hollow cleaning plate 74, forming a synergistic cleaning effect of "medicine spraying + brush wiping". During the cleaning process, the PLC controller 11 controls the first electric push rod 3 to perform intermittent extension operation, driving the entire cleaning mechanism 7 to move slowly along the length direction of the heat exchanger shell, ensuring that the cleaning brush 76 and the high-pressure spray head 77 can cover every area of the inner wall of the heat exchanger shell, and finally achieving comprehensive and thorough cleaning of the inner wall of the heat exchanger shell.

[0044] When the first electric push rod 3 performs intermittent extension action, its moving end synchronously drives the mounting plate 4 and the third electric push rod 101 and the flexible water pushing plate 102 fixed at the bottom of the mounting plate 4 to move along the axial direction of the heat exchanger shell. Since the flexible water pushing plate 102 has been adjusted to tightly fit the inner wall at the bottom of the heat exchanger shell by the third electric push rod 101 in advance, the flexible water pushing plate 102 can continuously slide and fit the bottom inner wall during the movement, pushing the medicine water (containing dissolved dirt and residual medicine) accumulated at the bottom of the heat exchanger shell to the other opening direction along the axial direction during the cleaning process. This can effectively prevent the medicine water from staying on the inner wall area for a long time after cleaning, prevent the corrosive components (such as acidic descaling agent and alkaline degreasing agent) in the residual medicine water from continuously corroding the cleaned heat exchanger shell inner wall, avoid the occurrence of pitting and mottling damage on the inner wall, reduce the secondary deposition of dirt after evaporation of the medicine water, avoid the formation of a new scale layer affecting the subsequent cleaning effect, prevent the local accumulation of medicine water at the bottom of the heat exchanger shell from causing the concentration to rise, and avoid the over-erosion of high-concentration medicine on the heat exchanger shell substrate, thereby reliably protecting the heat exchanger shell.

[0045] During the operation of the cleaning mechanism 7, the rotating pipe 6 drives the hollow cleaning plate 74 and the cleaning brush 76 to rotate under the drive of the motor 5. When the cleaning brush 76 rotates from the top of the heat exchanger shell to the bottom position, the rotating pipe 6 will synchronously drive the trigger rod 93 fixed on the pipe wall to move along the rotating track from the top to the bottom. The end of the trigger rod 93 is designed as a sharp end structure, and an arc-shaped trigger plate 95 is fixed at the corresponding bottom position on the inner side of the heat exchanger shell. The arc-shaped trigger plate 95 is provided with arc-shaped chamfers on both sides. When the trigger rod 93 rotates to the bottom, the sharp end will first contact the arc-shaped chamfer. With the continuous rotation of the rotating pipe 6, the sharp end generates a downward pressure on the arc-shaped chamfer, pushing the arc-shaped trigger plate 95 to move downward along the vertical direction and compressing the elastic expansion rod 94. The bottom of the arc-shaped trigger plate 95 is fixed with a rubber trigger head 96. When it moves downward to a certain stroke, the rubber trigger head 96 will contact and press the trigger switch 97 button installed on the inner wall of the hollow fixed disc 91. After the trigger switch 97 is activated, it immediately sends an electrical signal to the PLC controller 11. After the PLC controller 11 receives the signal, it immediately controls the second electric push rod 72 to increase the extension amount, so that the hollow cleaning plate 74 drives the cleaning brush 76 to further approach the bottom inner wall of the heat exchanger shell, increasing the contact pressure between the cleaning brush 76 and the bottom inner wall of the heat exchanger shell, thereby improving the wiping intensity of the brush on the bottom inner wall of the heat exchanger shell. At the same time, the PLC controller 11 synchronously increases the output power of the pump body in the medicine tank 81, improves the delivery pressure of the cleaning agent, and enhances the flow rate and impact force of the agent sprayed by the high-pressure nozzle 77 on the hollow cleaning plate 74, thereby improving the washing intensity on the bottom inner wall. The reason is that the bottom inner wall of the heat exchanger shell is affected by gravity, and the dirt (such as scale, sludge, and corrosion products) in the fluid is prone to depositing on the bottom inner wall. In long-term operation, the dirt will be closely attached to the bottom inner wall, forming a more stubborn scale layer than other areas. Through the linkage mechanism of the trigger rod 93 and the arc-shaped trigger plate 95, the automatic improvement of the cleaning intensity of the bottom of the heat exchanger shell is realized, which can ensure that the stubborn dirt on the bottom is effectively stripped and avoid the residual dirt on the bottom due to insufficient cleaning intensity, thereby ensuring the cleaning quality of each area of the inner wall of the heat exchanger shell and meeting the equipment cleanliness requirements.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, which should be covered by the claims of the present application.

Claims

1. A high-efficiency online cleaning device for heat exchangers, characterized in that: Including fixed cylinder (1), the open top and bottom of fixed cylinder (1) are equipped with fixed mechanism (2) connected with heat exchange pipe shell end part; The inner side wall of fixed cylinder (1) is fixedly provided with a first electric push rod (3), the moving end of first electric push rod (3) is fixedly provided with a mounting plate (4), the side of mounting plate (4) away from first electric push rod (3) is fixedly provided with a motor (5), the output end of motor (5) is fixedly provided with a rotating tube (6), one end of rotating tube (6) away from motor (5) is provided with a cleaning mechanism (7); The outer side wall of fixed cylinder (1) is provided with a medicine supply mechanism (8) connected with rotating tube (6), and medicine supply mechanism (8) is communicated with cleaning mechanism (7); The tube wall of rotating tube (6) is provided with a bottom pressure boost trigger mechanism (9) connected with the side of mounting plate (4), and bottom pressure boost trigger mechanism (9) is linked with cleaning mechanism (7); The bottom of mounting plate (4) is provided with a water pushing mechanism (10), and water pushing mechanism (10) can push the medicine in the bottom inner wall of heat exchange pipe shell; The outer side wall of fixed cylinder (1) is fixedly provided with a PLC controller (11), first electric push rod (3), motor (5), cleaning mechanism (7), medicine supply mechanism (8), bottom pressure boost trigger mechanism (9) and water pushing mechanism (10) are electrically connected with PLC controller (11); The cleaning mechanism (7) comprises a hollow rotating rod (71) fixedly arranged at the end of the rotating tube (6), one end of the hollow rotating rod (71) away from the rotating tube (6) is fixedly provided with a second electric push rod (72), the moving end of the second electric push rod (72) is fixedly provided with a pressure sensor (73), the top of the pressure sensor (73) is fixedly provided with a hollow cleaning plate (74), and the hollow cleaning plate (74) is an arc plate, two rubber medicine guide tubes (75) are fixedly arranged between the hollow rotating rod (71) and the hollow cleaning plate (74) in a symmetrical manner, cleaning brushes (76) are fixedly arranged at the top of the two sides of the hollow cleaning plate (74), and a high-pressure nozzle (77) is fixedly arranged at the top center of the hollow cleaning plate (74); The bottom pressure boost trigger mechanism (9) comprises a hollow fixed disc (91) rotatably arranged on the rotating tube (6), a second fixed rod (92) is fixedly arranged between the side wall of the hollow fixed disc (91) and the side of the mounting plate (4), a trigger rod (93) is fixedly arranged on the tube wall of the rotating tube (6) and located in the hollow fixed disc (91), two elastic expansion rods (94) are fixedly arranged on the bottom inner wall of the hollow fixed disc (91) in a symmetrical manner, one and the same arc-shaped trigger plate (95) is fixedly arranged at the ends of the two elastic expansion rods (94) away from the inner wall of the hollow fixed disc (91), a rubber trigger head (96) is fixedly arranged at the bottom of the arc-shaped trigger plate (95), and a trigger switch (97) is fixedly arranged on the bottom inner wall of the hollow fixed disc (91) and corresponds to the position of the rubber trigger head (96).

2. The high-efficiency online cleaning device for heat exchanger according to claim 1, characterized in that, The fixing mechanism (2) comprises an L-shaped fixing plate (21) fixedly arranged at the opening of the fixing cylinder (1), a screw rod (22) is threadedly arranged on the side wall of the vertical part of the L-shaped fixing plate (21), one end of the screw rod (22) is rotatably provided with a pressing plate (23), and the other end of the screw rod (22) is fixedly provided with a handle (24).

3. The high-efficiency online cleaning device for heat exchanger according to claim 2, characterized in that, The opening of the fixing cylinder (1) is provided with a guide pressing groove (12), and the guide pressing groove (12) is in clamping connection with the opening of the end part of the heat exchange pipe shell, and the guide pressing groove (12) is used in cooperation with the pressing plate (23).

4. The heat exchanger high-efficiency online cleaning device according to claim 1, characterized in that, The medicine supply mechanism (8) comprises a medicine supply box (81) fixedly arranged on the outer side wall of the fixing cylinder (1), an outwardly extending medicine supply bellow (82) is fixedly arranged at the output end of the inner pump body of the medicine supply box (81), a hollow medicine guide disc (83) is rotatably arranged on the pipe wall of the rotating pipe (6), a first fixing rod (84) is fixedly arranged between the side wall of the hollow medicine guide disc (83) and the side surface of the mounting plate (4), one end of the medicine supply bellow (82) away from the medicine supply box (81) is fixedly connected with the side wall of the hollow medicine guide disc (83), and the pipe wall of the rotating pipe (6) and the part located in the hollow medicine guide disc (83) are provided with a medicine guide hole (85).

5. The heat exchanger high-efficiency online cleaning device according to claim 1, characterized in that, The end of the trigger rod (93) away from the rotating pipe (6) is in a pointed structure, and the two sides of the arc-shaped trigger plate (95) are provided with arc-shaped chamfers.

6. The heat exchanger high-efficiency online cleaning device according to claim 1, characterized in that, The water pushing mechanism (10) comprises a third electric push rod (101) fixedly arranged at the bottom of the mounting plate (4), a flexible water pushing plate (102) is fixedly arranged at the moving end of the third electric push rod (101), and the flexible water pushing plate (102) is in an arc-shaped plate.

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