Quantitative spraying device and method for heat exchange tube

Abstract

This invention relates to the field of heat exchanger tube anti-corrosion spraying equipment, and provides a heat exchanger tube quantitative spraying device and method, which includes a chassis, a crossbar A, a slider A, a crossbar B, a hollow tube, a storage tank, and a liquid pump. The chassis has a door that seals with it. A rotating ring A is installed in a through hole on one side of the chassis, and a rotating ring B is rotatably installed in a through hole on the other side. Motor A drives rotating ring A, and motor B drives rotating ring B. Crossbar A is located inside rotating ring A, and slider A is installed on crossbar A. A clamping component is installed on crossbar A. Crossbar B is located inside rotating ring B, and slider B is slidably installed on crossbar B. A linear module for driving slider B to slide is installed on crossbar B. The hollow tube is rotatably installed on slider B, and a spray head is installed on the hollow tube. Motor C drives the hollow tube. The storage tank is installed on a support at the bottom of the chassis, and the liquid pump is installed on the support, connecting the storage tank and the hollow tube. In this invention, the heat exchanger tube is easy to assemble and disassemble, and the spraying uniformity is high. The operation is simple and convenient.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger tube anti-corrosion spraying equipment, and in particular to a heat exchanger tube quantitative spraying device and method. Background Technology

[0002] Heat exchanger tubes are components of a heat exchanger, housed within the shell, used for heat exchange between two media. They possess high thermal conductivity and excellent isothermal properties. They are devices that can rapidly transfer heat energy from one point to another with almost no heat loss; therefore, they are called heat transfer superconductors, with a thermal conductivity thousands of times that of copper. The surface of heat exchanger tubes typically requires a corrosion-resistant coating. Currently, this coating is mainly done manually, resulting in poor uniformity and a tendency to produce burrs. Subsequent polishing is also necessary, which is time-consuming and labor-intensive.

[0003] Chinese Patent CN210304256U discloses a heat exchanger tube bundle anti-corrosion material spraying device, including a base plate, a bracket, a support device, a spraying device, and a guiding device. The support device supports the heat exchange tubes, and the guiding device is located on the upper part of the bracket, driving the spraying device to spray along the heat exchange tubes. The support device is located on one side of the bracket and includes two support rods extending into the interior of both ends of the heat exchange tubes. The spraying device includes a material box with an arc-shaped spray pipe hinged to its lower side, symmetrically arranged on both sides of the heat exchange tubes. The guiding device includes two sets of pulleys horizontally located on the upper part of the bracket, with a transmission belt connecting the pulleys of the same diameter in the two sets. A clamp is fixedly installed on the side of the middle of the transmission belt. The guiding device also includes a telescopic rod, one end of which is fixedly connected to the material box, and the other end of which is connected to the clamp. This invention is used for anti-corrosion spraying of U-shaped heat exchange tubes, achieving uniform spraying, high quality, good effect, and significantly improved spraying efficiency.

[0004] However, the device still has shortcomings: the installation and adjustment are troublesome before spraying different types of heat exchange tubes, and the spraying process by moving and adjusting the nozzle direction takes a long time, affecting the overall processing and production speed. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background art by proposing a quantitative spraying device and method for heat exchange tubes.

[0006] The technical solution of the present invention: On one hand, the present invention proposes a heat exchange tube quantitative spraying device, including a chassis, a crossbar A, a slider A, a clamping plate, a crossbar B, a hollow tube, a storage tank and a liquid pump.

[0007] The chassis has a rotating door that seals against it. Two through holes are symmetrically arranged on the chassis, communicating with its interior. A rotating ring A is rotatably mounted in one through hole, and a rotating ring B is rotatably mounted in the other. A motor A drives the rotation of rotating ring A, and a motor B drives the rotation of rotating ring B. A crossbar A is located inside rotating ring A. Sliding blocks A are symmetrically and slidably mounted on the crossbar A. A bidirectional module is mounted on the crossbar A to drive the synchronous sliding of the two sliding blocks A. A clamping plate is slidably mounted inside sliding block A, and a hydraulic cylinder is mounted on sliding block A to drive the clamping plate.

[0008] A crossbar B is positioned inside the rotating ring B, and a slider B is slidably mounted on the crossbar B. A linear module driving the slider B to slide is mounted on the crossbar B. A hollow tube is rotatably mounted on the slider B, and several nozzles are mounted on the hollow tube. A motor C driving the hollow tube to rotate is mounted on the slider B. A storage tank is mounted on a support at the bottom of the machine housing, and a discharge pipe communicating with the bottom of the machine housing is installed therein, inserting into the storage tank. A liquid pump is mounted on the support, with its output end inserted into the storage tank and located below the liquid surface. A discharge pipe connects the hollow tube and the output end of the liquid pump.

[0009] Preferably, dust covers are provided on the outside of the through holes on both sides of the chassis, and casters are provided on the bottom of the chassis support, with self-locking components on the casters.

[0010] Preferably, an external gear ring A is provided on the outside of the rotating ring A, and a gear A is connected to the output end of the motor A, with the gear A meshing with the external gear ring A. An external gear ring B is provided on the outside of the rotating ring B, and a gear B is connected to the output end of the motor B, with the gear B meshing with the external gear ring B. An external gear ring C is provided on the outside of one end of the hollow tube inserted into the slider B, and a gear C is connected to the output end of the motor C, with the gear C meshing with the external gear ring C.

[0011] Preferably, an inclined guide trough is provided on the bottom plate of the chassis, the feed pipe is inserted into the guide trough and communicates with its interior, and the opening of the feed pipe inserted into the storage tank is located below the liquid surface.

[0012] Preferably, a fan is installed on the bottom support of the chassis, and an air extraction pipe is installed at the input end of the fan. The air extraction pipe is inserted into the storage tank and located above the liquid surface. The output end of the fan is connected to the outside. A feeding pipe connected to the inside of the storage tank is installed on the storage tank, and a pipe cap is detachably installed on the pipe opening.

[0013] Preferably, a stirring assembly is installed inside the storage tank, comprising a stirring paddle and a synchronous belt. Two sets of stirring paddles are symmetrically and rotatably arranged inside the storage tank, and the two stirring paddles are connected by a synchronous belt drive. A motor D is installed on the storage tank to drive the two stirring paddles to rotate synchronously. A liquid level sensor and an alarm are installed inside the storage tank, and a controller is installed inside the chassis. The controller is electrically connected to the liquid level sensor and controls the alarm.

[0014] On the other hand, the present invention also proposes a quantitative spraying method for heat exchange tubes, comprising the following steps:

[0015] S1. If the U-shaped heat exchanger tube is to be sprayed, first start the linear module, and the linear module drives the slider B to move to one end of the crossbar B.

[0016] S2. Based on the distance between the two straight legs of the U-shaped heat exchanger tube, start the bidirectional module. The bidirectional module drives the two sliders A on both sides to slide synchronously until the insertion port distance is the same as the distance between the straight legs of the heat exchanger tube. Then, insert the two straight legs of the U-shaped heat exchanger tube into the insertion holes of the corresponding sliders A. Start the hydraulic cylinder. The hydraulic cylinder drives the clamping plate to slide and clamp and constrain the straight legs of the heat exchanger tube.

[0017] S3. Start motor C. Motor C drives the hollow tube to rotate, so that the nozzle faces the surface of the heat exchange tube body. Then start the liquid pump. The liquid pump draws material from the storage tank and sends it into the hollow tube through the discharge pipe. The material is refined under high pressure and sprayed out from the nozzle. The material is sprayed onto the surface of the heat exchange tube. At this time, start motor B. Motor B drives the rotating ring B to rotate slowly, so as to spray all surfaces of the heat exchange tube without dead angles. After the spraying is completed, the rotating ring B stops rotating. The rotating ring A rotates under the drive of motor A, and drives the U-shaped heat exchange tube to rotate. Centrifugal force is used to throw off the excess material on the surface of the heat exchange tube to prevent the material from dripping on the surface of the heat exchange tube and causing protrusions or burrs. The thrown-off material flows back into the storage tank along the discharge pipe. After the spraying is completed, wait for the coating agent on the surface of the heat exchange tube to solidify slightly, and then open the box door to take out the heat exchange tube.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: By setting up rotating ring A and rotating ring B, the heat exchange tube is fixed on the slider A of the inner crossbar A of rotating ring A, and the nozzle is fixed on the slider B. By adjusting the position of slider B, spraying operations can be carried out from between or outside the heat exchange tubes on both sides. When using multi-nozzle spraying, the heat exchange tube can be sprayed quickly without moving the position of the nozzle, saving time and improving processing efficiency. At the same time, after the initial spraying of the heat exchange tube is completed, the present invention can drive rotating ring A to rotate at high speed, thereby making the unsolidified sprayed material on the surface of the heat exchange tube more evenly distributed. Under the action of centrifugal force, excess sprayed material on the surface of the heat exchange tube is thrown off, preventing the dripping sprayed material from producing burrs or protrusions after drying, reducing subsequent polishing operations, and further improving the production and processing efficiency and spraying quality of the heat exchange tube. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0020] Figure 2 This is a diagram showing the connection structure between motor A and rotating ring A;

[0021] Figure 3 This is a diagram showing the connection structure between motor B and rotating ring B;

[0022] Figure 4 This is a diagram of the internal structure of the storage bin.

[0023] Reference numerals in the attached diagram: 1. Chassis; 2. Door; 3. Rotary ring A; 4. External gear ring A; 5. Motor A; 6. Gear A; 7. Crossbar A; 8. Bidirectional module; 9. Slider A; 10. Clamping plate; 11. Hydraulic cylinder; 12. Rotary ring B; 13. External gear ring B; 14. Motor B; 15. Gear B; 16. Crossbar B; 17. Linear module; 18. Slider B; 19. Hollow tube; 20. Nozzle; 21. Motor C; 22. Storage tank; 23. Feed pipe; 24. Feeding pipe; 25. Fan; 26. Liquid pump; 27. Discharge pipe; 28. Liquid level sensor; 29. ​​Alarm; 30. Agitator; 31. Synchronous belt; 32. Motor D. Detailed Implementation

[0024] Example 1: As Figures 1-3 As shown, the heat exchanger tube quantitative spraying device proposed in this invention includes a housing 1, a crossbar A7, a slider A9, a clamping plate 10, a crossbar B16, a hollow tube 19, a storage tank 22, and a liquid pump 26.

[0025] The chassis 1 has a rotatable door 2 that seals against it. Two through holes are symmetrically arranged on the chassis 1, communicating with its interior. A rotating ring A3 is rotatably installed in one through hole, and a rotating ring B12 is rotatably installed in the other through hole. Dust covers are installed on the exterior of both through holes on the chassis 1. Universal wheels with self-locking components are installed at the bottom of the chassis 1's support frame. A motor A5 drives the rotating ring A3, and a motor B14 drives the rotating ring B12. An external gear ring A4 is installed outside the rotating ring A3. A gear A6 is connected to the output of motor A5, and gear A6 meshes with the external gear ring A4. An external gear ring B13 is installed outside the rotating ring B12. A gear B15 is connected to the output of motor B14, and gear B15 meshes with the external gear ring B13. A hollow tube 19 is inserted into the slider B18, with an external gear ring C at one end. The output end of the motor C21 is connected to a gear C, which meshes with the external gear ring C. A crossbar A7 is located inside the rotating ring A3. Slider A9 is symmetrically and slidably mounted on the crossbar A7. A bidirectional module 8 is mounted on the crossbar A7 to drive the sliders A9 on both sides to slide synchronously. A clamping plate 10 is slidably mounted inside the slider A9. A hydraulic cylinder 11 is mounted on the slider A9 to drive the clamping plate 10 to slide.

[0026] A crossbar B16 is located inside the rotating ring B12, and a slider B18 is slidably mounted on the crossbar B16. A linear module 17 for driving the slider B18 to slide is mounted on the crossbar B16. A hollow tube 19 is rotatably mounted on the slider B18, and several nozzles 20 are mounted on the hollow tube 19. A motor C21 for driving the hollow tube 19 to rotate is mounted on the slider B18. A storage tank 22 is mounted on the bottom support of the housing 1, and a discharge pipe 23 communicating with the bottom of the housing 1 is installed therein, inserted into the storage tank 22. A liquid pump 26 is mounted on the support, and the output end of the liquid pump 26 is inserted into the storage tank 22 and located below the liquid surface. A discharge pipe 27 connects the hollow tube 19 and the output end of the liquid pump 26.

[0027] In this embodiment, when spraying the linear heat exchange tube, the bidirectional module 8 is first activated to increase the distance between the two sliders A9, then the linear module 17 is activated to adjust slider B18 to the center position on the crossbar B16, then the hollow tube 19 is activated to rotate and spray the heat exchange tubes on both sides from the middle, then slider B18 is adjusted to the end of the crossbar B16, and then the hollow tube 19 is used to spray from the outside of the heat exchange tube while rotating. When spraying the U-shaped heat exchange tube, slider B18 is at the end of the crossbar B16, and spraying is done while rotating, which is highly efficient, and the fixing and disassembly of the heat exchange tube are very simple and easy.

[0028] Example 2: Figure 1 and Figure 4 As shown, the heat exchanger tube quantitative spraying device proposed in this invention, compared with Embodiment 1, has an inclined material guide trough on the bottom plate of the casing 1. The feeding pipe 23 is inserted into the material guide trough and communicates with its interior, and the opening of the feeding pipe 23 inserted into the storage tank 22 is located below the liquid surface. A fan 25 is installed on the bottom support of the casing 1. An exhaust pipe is installed at the input end of the fan 25. The exhaust pipe is inserted into the storage tank 22 and located above the liquid surface. The output end of the fan 25 is connected to the outside. A feeding pipe 24 is installed on the storage tank 22 and communicates with its interior. A pipe cap is detachably installed on the opening of the feeding pipe 24. A stirring assembly is installed inside the storage tank 22. The stirring assembly includes a stirring paddle 30 and a synchronous belt 31. Two sets of stirring paddles 30 are symmetrically and rotatably arranged inside the storage tank 22. The two stirring paddles 30 are connected by a synchronous belt 31. A motor D32 is installed on the storage tank 22 to drive the two stirring paddles 30 to rotate synchronously. A liquid level sensor 28 and an alarm 29 are installed inside the storage tank 22, and a controller is installed inside the chassis 1. The controller is electrically connected to the liquid level sensor 28 and controls the alarm 29.

[0029] In this embodiment, when the nozzle 20 is performing the spraying operation, the fan 25 is started. The fan 25 draws air from the storage tank 22, making the storage tank 22 a negative pressure state. At this time, the air in the machine box 1 enters the storage tank 22 along the discharge pipe 23. The atomized coating agent in the machine box 1 will not overflow along the through hole under the airflow, ensuring the safety and hygiene of the construction environment. Furthermore, a stirring component is set in the storage tank 22. The stirring paddle 30 is driven by the motor D32 to rotate, thereby keeping the coating agent in the storage tank 22 dynamic and preventing the occurrence of stratification. The liquid level sensor 28 constantly detects the liquid level of the coating agent in the storage tank 22 to prevent the liquid level from being too low. When the liquid level is too low, the alarm 29 sounds an alarm to remind the user to add more material.

[0030] Example 3: The present invention also proposes a quantitative spraying method for heat exchange tubes, including the following steps: S1. If U-shaped heat exchange tubes are to be sprayed, first start the linear module 17, and the linear module 17 drives the slider B18 to move to one end of the crossbar B16.

[0031] S2. Based on the distance between the two straight legs of the U-shaped heat exchanger tube, start the bidirectional module 8. The bidirectional module 8 drives the two side sliders A9 to slide synchronously until the insertion port distance is the same as the distance between the straight legs of the heat exchanger tube. Then, insert the two straight legs of the U-shaped heat exchanger tube into the insertion holes of the corresponding side sliders A9 respectively. Start the hydraulic cylinder 11. The hydraulic cylinder 11 drives the clamping plate 10 to slide and clamp and constrain the straight legs of the heat exchanger tube.

[0032] S3. Start motor C21. Motor C21 drives hollow tube 19 to rotate, so that nozzle 20 faces the surface of heat exchange tube body. Then start liquid pump 26. Liquid pump 26 draws material from storage tank 22 and sends it into hollow tube 19 through discharge pipe 27. The material is refined under high pressure and sprayed out from nozzle 20. The material is sprayed onto the surface of heat exchange tube. At this time, start motor B14. Motor B14 drives rotating ring B12 to rotate slowly, thereby spraying all surfaces of heat exchange tube without dead angles. After the spraying is completed, rotating ring B12 stops rotating. Rotating ring A3 rotates under the drive of motor A5, and drives U-shaped heat exchange tube to rotate. Centrifugal force is used to throw off excess material on the surface of heat exchange tube to prevent material from dripping on the surface of heat exchange tube and causing protrusions or burrs. The thrown-off material flows back into storage tank 22 along discharge pipe 23. After the spraying is completed, wait for the coating agent on the surface of heat exchange tube to solidify slightly, and then open the box door 2 to take out the heat exchange tube.

[0033] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A heat exchange tube quantitative spraying device, comprising a cabinet (1) and a storage mechanism, characterized in that, The two ends of the casing (1) are respectively provided with a heat exchange tube fixing mechanism and a spraying mechanism; the heat exchange tube fixing mechanism includes a rotating ring A (3), a motor A (5), a crossbar A (7), a slider A (9), and a clamping plate (10); the spraying mechanism includes a rotating ring B (12), a motor B (14), a crossbar B (16), and a hollow tube (19); two through holes communicating with the inside of the casing (1) are symmetrically provided on the casing (1), a rotating ring A (3) is rotatably installed in one through hole, and a rotating ring B (12) is rotatably installed in the other through hole. The casing (1) is provided with a motor A (5) to drive the rotating ring A (3) to rotate, and a motor B (14) to drive the rotating ring B (12) to rotate. The crossbar A (7) is located inside the rotating ring A (3). Slider A (9) is symmetrically and slidably mounted on crossbar A (7). A bidirectional module (8) is mounted on crossbar A (7) to drive the two sides of slider A (9) to slide synchronously. Clamping plate (10) is slidably mounted inside slider A (9). A hydraulic cylinder (11) is mounted on slider A (9) to drive clamping plate (10) to slide. Crossbar B (16) is mounted inside rotating ring B (12). Slider B (18) is slidably mounted on crossbar B (16). A linear module (17) is mounted on crossbar B (16) to drive slider B (18) to slide. Hollow tube (19) is rotatably mounted on slider B (18). Several nozzles (20) are mounted on hollow tube (19). A motor C is mounted on slider B (18) to drive hollow tube (19) to rotate. (21); The hollow tube (19) is connected to the storage mechanism; The storage mechanism includes a storage tank (22) and a liquid pump (26); The storage tank (22) is set on the bottom support of the machine box (1), and the bottom of the machine box (1) is provided with a discharge pipe (23) that communicates with its interior. The discharge pipe (23) is inserted into the storage tank (22); The liquid pump (26) is set on the support, and the output end of the liquid pump (26) is inserted into the storage tank (22) and located below the liquid surface. The discharge pipe (27) is connected to the hollow tube (19) and the output end of the liquid pump (26); An inclined guide groove is provided on the bottom plate of the machine box (1), and the discharge pipe (23) is inserted into the guide groove and communicates with its interior. The opening of one end of the discharge pipe (23) inserted into the storage tank (22) is located at Below the liquid surface; a fan (25) is installed on the bottom support of the chassis (1), and an air extraction pipe is installed at the input end of the fan (25). The air extraction pipe is inserted into the storage tank (22) and located above the liquid surface. The output end of the fan (25) is connected to the outside. A feeding pipe (24) connected to the inside of the storage tank (22) is installed on the storage tank (22). A pipe cover is detachably installed on the pipe opening of the feeding pipe (24). A stirring assembly is installed inside the storage tank (22). The stirring assembly includes a stirring paddle (30) and a synchronous belt (31). Two sets of stirring paddles (30) are symmetrically and rotatably installed inside the storage tank (22). The stirring paddles (30) on both sides are connected by a synchronous belt (31). A motor D (32) is installed on the storage tank (22) to drive the stirring paddles (30) on both sides to rotate synchronously.A liquid level sensor (28) and an alarm (29) are installed inside the storage tank (22), and a controller is installed inside the chassis (1). The controller is electrically connected to the liquid level sensor (28), and the controller controls the alarm (29).

2. The heat exchanger tube quantitative spraying device according to claim 1, characterized in that, The chassis (1) is hinged with a door (2), and dust covers are provided on the outside of the through holes on both sides of the chassis (1). The bottom support of the chassis (1) is equipped with casters, and self-locking components are provided on the casters.

3. The heat exchange tube quantification spraying device according to claim 2, characterized in that, External gear ring A (4) is set on the outside of rotating ring A (3), and gear A (6) is connected to the output end of motor A (5). Gear A (6) meshes with external gear ring A (4); External gear ring B (13) is set on the outside of rotating ring B (12), and gear B (15) is connected to the output end of motor B (14). Gear B (15) meshes with external gear ring B (13); External gear ring C is set on the outside of one end of hollow tube (19) inserted into slider B (18), and gear C is connected to the output end of motor C (21). Gear C meshes with external gear ring C.

4. An application method of the heat exchanger tube quantitative spraying device as described in claim 3, characterized in that, Includes the following steps: S1. To spray the U-shaped heat exchange tube, first start the linear module (17), which drives the slider B (18) to move to one end of the crossbar B (16); S2. According to the distance between the two straight legs of the U-shaped heat exchange tube, start the bidirectional module (8), which drives the sliders A (9) on both sides to slide synchronously until the insertion port distance is the same as the distance between the straight legs of the heat exchange tube. Then, insert the two straight legs of the U-shaped heat exchange tube into the insertion holes of the corresponding side sliders A (9), start the hydraulic cylinder (11), which drives the clamping plate (10) to slide and clamp the straight legs of the heat exchange tube; S3. Start the motor C (21), which drives the hollow tube (19) to rotate so that the nozzle (20) faces the surface of the heat exchange tube body. Then, start the liquid pump (26), which drives the liquid pump (26) to rotate. Material is drawn from the storage box (22) and sent into the hollow tube (19) through the discharge pipe (27). The material is refined under high pressure and sprayed out from the nozzle (20). The material is sprayed on the surface of the heat exchange tube. At this time, the motor B (14) is started. The motor B (14) drives the rotating ring B (12) to rotate slowly, and then sprays the heat exchange tube without dead angles on all surfaces. After the spraying is completed, the rotating ring B (12) stops rotating. The rotating ring A (3) rotates under the drive of the motor A (5) and drives the U-shaped heat exchange tube to rotate. The centrifugal force is used to throw off the excess material on the surface of the heat exchange tube to prevent the material from dripping on the surface of the heat exchange tube and causing protrusions or burrs. The thrown-off material flows back into the storage box (22) along the discharge pipe (23). After the spraying is completed, wait for the coating agent on the surface of the heat exchange tube to solidify slightly, and then open the box door (2) to take out the heat exchange tube.

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