Backwashing device of heat exchanger

Abstract

The utility model relates to the technical field of backwashing equipment, and discloses a heat exchanger backwashing device which comprises a base and a cleaner body, the right end of the cleaner body is communicated with a water outlet pipe, the left side of the inner wall of the water outlet pipe is fixedly connected with a supporting frame, and the top of the supporting frame is fixedly connected with a first motor protection shell. The inner wall of the first motor protection shell is fixedly connected with a servo motor, the output end of the servo motor is fixedly connected with an elastic coupling, the right end of the elastic coupling is fixedly connected with a water flow driving impeller, and the right end of the water flow driving impeller is fixedly connected with a rotating column. The impeller is driven by water flow to drive the rotating column and the cleaning brush to brush and wash the filter screen, impurities brought out of the heat exchanger are prevented from blocking the filter screen, when the flow speed of water is insufficient, the servo motor guarantees normal cleaning of the cleaning brush, the elastic coupler is connected with the servo motor and the impeller driven by the water flow, displacement deviation is compensated, and stable power transmission is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of backwashing equipment, and in particular to a heat exchanger backwashing device. Background Technology

[0002] A heat exchanger, also known as a heat exchanger, is a device that transfers some of the heat from a hot fluid to a cold fluid. It achieves heating or cooling by allowing two fluids at different temperatures to exchange heat over a heat transfer area. With long-term operation, dirt and impurities inevitably accumulate in the internal pipes and heat exchange surfaces of a heat exchanger, affecting its heat transfer efficiency. A heat exchanger backwashing device, as a specialized device for cleaning heat exchangers, can remove dirt and impurities from inside the heat exchanger by changing the flow direction of the fluid and adding cleaning agents, using the flushing action of the fluid to restore heat transfer performance, ensure the continuous and stable operation of the heat exchanger, and extend the service life of the equipment.

[0003] In heat exchanger backwashing devices, the filter components are crucial for ensuring stable operation and efficient heat exchange. However, the filter screens are prone to clogging. Although the filters have bidirectional filtration capabilities, they still struggle to handle impurities in water under special conditions such as seawater. These impurities accumulate on the filter screens, causing them to clog rapidly. Furthermore, the backwashing device's filters cannot meet the filtration requirements for fine particulate impurities, allowing some small impurities to still enter the heat exchanger. Long-term accumulation will still affect heat exchange efficiency. The existing solution is to use automatic backwashing filters, or reasonably increase the number of filter screens. When the pressure difference across the filter screens reaches a set value, the backwashing program is automatically activated, flushing the filter screens with reverse water flow to remove impurities. However, the control mechanism of automatic backwashing filters is prone to malfunction, causing backwashing to fail to proceed normally. Increasing the number of filter screens increases water flow resistance, affecting heat exchange efficiency, and the interception effect on fine particles remains limited. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a heat exchanger backwashing device, which aims to improve the problems of easy damage to the automatic backwashing filter and the impact of increasing the number of filter screens on heat exchange efficiency in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a heat exchanger backwashing device, comprising a base and a cleaner body. A water outlet pipe is connected to the right end of the cleaner body. A support frame is fixedly connected to the left side of the inner wall of the water outlet pipe. A motor protective shell is fixedly connected to the top of the support frame. A servo motor is fixedly connected to the inner wall of the motor protective shell. An elastic coupling is fixedly connected to the output end of the servo motor. A water flow drive impeller is fixedly connected to the right end of the elastic coupling. A rotating column is fixedly connected to the right end of the water flow drive impeller. Two cleaning brushes are fixedly connected to the right side of the outer wall of the rotating column. Multiple fixing rods are fixedly connected to the middle of the inner wall of the water outlet pipe. A guide cylinder is fixedly connected to the other end of each fixing rod. A filter screen is fixedly connected to the right side of the inner wall of the water outlet pipe. A vibrator is fixedly connected to the front left side of the filter screen. An electric controller is fixedly connected to the right side of the outer wall of the water outlet pipe. A baffle plate is fixedly connected to the bottom end of the electric controller. An impurity recovery mechanism is provided on the inner wall of the cleaner body. The impurity recovery mechanism is used to recover impurities flushed from the heat exchanger.

[0006] As a further description of the above technical solution:

[0007] The impurity recovery mechanism includes a second motor protective shell. The front side of the second motor protective shell is fixedly connected to the front side of the inner wall of the main body of the cleaner. A rotating motor is fixedly connected to the top of the inner wall of the second motor protective shell. A gear is fixedly connected to the output end of the rotating motor. A sliding groove is opened in the lower middle part of the inner wall of the main body of the cleaner. A slider is slidably connected to the inner wall of the sliding groove. A rack is fixedly connected to the inner wall of the slider. A toggle plate is fixedly connected to the bottom end of the slider. An impurity recovery column is threadedly connected to the middle of the bottom wall of the main body of the cleaner.

[0008] As a further description of the above technical solution:

[0009] An observation port is provided on the front side of the main body of the cleaner, and an observation window is fixedly connected to the inner wall of the observation port.

[0010] As a further description of the above technical solution:

[0011] The base has multiple support columns fixedly connected to its bottom, and each support column has a lifter fixedly connected to its middle section.

[0012] As a further description of the above technical solution:

[0013] A console is fixedly connected to the top front side of the base, and a control panel is fixedly connected to the top of the console.

[0014] As a further description of the above technical solution:

[0015] The impurity recovery column has two opening slots at its bottom, and the inner walls of both opening slots are polished.

[0016] As a further description of the above technical solution:

[0017] A sealing gasket is fixedly connected around the outer wall of the water baffle, and the shape of the sealing gasket is the same as the size of the outer wall of the water baffle.

[0018] As a further description of the above technical solution:

[0019] The bottom ends of the multiple support columns are all fixedly connected with anti-slip sleeves, and the anti-slip sleeves on the front and rear sides are symmetrical to each other.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the impeller driven by water flow drives the rotating column and the cleaning brush to clean the filter screen, preventing impurities carried out in the heat exchanger from clogging the filter screen. When the water flow is insufficient to drive the cleaning brush, the servo motor can still ensure that the cleaning brush can clean the filter screen. The flexible coupling is used to connect the servo motor and the water flow driven impeller and compensate for the displacement deviation between the two to ensure the smoothness of power transmission.

[0022] 2. In this utility model, the rotating motor drives the gear to rotate synchronously, thereby driving the slider to move in the slide groove. Since the actuating plate is connected to the bottom of the slider, the actuating plate can clean the impurities that fall into the bottom wall of the cleaner body, and under the drive of the water flow, the impurities fall into the impurity recovery column, which improves the cleaning efficiency of impurities backwashed from the heat exchanger. Attached Figure Description

[0023] Figure 1 This is a perspective view of a heat exchanger backwashing device proposed in this utility model;

[0024] Figure 2 This is a cross-sectional view of the main body of the cleaner of a heat exchanger backwashing device proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the water flow driven impeller of a heat exchanger backwashing device proposed in this utility model;

[0026] Figure 4 This is an exploded view of the flexible coupling of a heat exchanger backwashing device proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the impurity recovery mechanism of a heat exchanger backwashing device proposed in this utility model;

[0028] Figure 6This is an exploded view of the impurity recovery mechanism of a heat exchanger backwashing device proposed in this utility model;

[0029] Figure 7 This is a cross-sectional view of the impurity recovery column of a heat exchanger backwashing device proposed in this utility model.

[0030] Legend:

[0031] 1. Base; 2. Cleaner body; 3. Impurity recovery mechanism; 301. Motor protective shell II; 302. Rotating motor; 303. Gear; 304. Slide groove; 305. Slider; 306. Rack; 307. Actuating plate; 308. Impurity recovery column; 4. Support frame; 5. Motor protective shell I; 6. Servo motor; 7. Flexible coupling; 8. Rotating column; 9. Water flow driven impeller; 10. Fixed rod; 11. Guide cylinder; 12. Filter screen; 13. Cleaning brush; 14. Vibrator; 15. Water outlet pipe; 16. Water baffle; 17. Observation port; 18. Observation window; 19. Cover opening groove; 20. Sealing gasket; 21. Support column; 22. Lifter; 23. Anti-slip sleeve; 24. Control console; 25. Control panel; 26. Electric controller. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 2 , Figure 3 and Figure 4This utility model provides an embodiment of a heat exchanger backwashing device, comprising a base 1 and a cleaner body 2. A water outlet pipe 15 is connected to the right end of the cleaner body 2, allowing water from the cleaner to flow into the heat exchanger. A support frame 4 is fixedly connected to the left side of the inner wall of the water outlet pipe 15, supporting a motor protective shell 5. The top of the support frame 4 is also fixedly connected to the motor protective shell 5, protecting a servo motor 6. A servo motor 6 is fixedly connected to the inner wall of the motor protective shell 5, rotating as a cleaning brush 13. The backup power source, the output end of the servo motor 6, is fixedly connected to a flexible coupling 7. The flexible coupling 7 is used to connect the two shafts and compensate for possible displacement deviations between the two shafts, ensuring the smoothness of power transmission. A water flow drive impeller 9 is fixedly connected to the right end of the flexible coupling 7. The water flow drive impeller 9 enables the water flow to provide power for the rotation of the cleaning brush 13. A rotating column 8 is fixedly connected to the right end of the water flow drive impeller 9. The rotating column 8 serves as a power transmission component. Two cleaning brushes 13 are fixedly connected to the right side of the outer wall of the rotating column 8. The two cleaning brushes 13 are used for... The filter screen 12 is scrubbed. Multiple fixing rods 10 are fixedly connected to the middle of the inner wall of the water outlet pipe 15. Each fixing rod 10 has a guide cylinder 11 fixedly connected to its other end. The fixing rods 10 and guide cylinders 11 provide support and guidance for the rotating column 8. A filter screen 12 is fixedly connected to the right side of the inner wall of the water outlet pipe 15. When the cleaning water from the cleaner flows into the heat exchanger through the filter screen 12, there will not be too many impurities. A vibrator 14 is fixedly connected to the front left end of the filter screen 12. The vibrator 14 is used to shake off impurities from the filter screen 12. The water outlet pipe 15... An electric controller 26 is fixedly connected to the right side of the outer wall. The electric controller 26 facilitates the operation of the baffle plate 16 by the staff. The baffle plate 16 is fixedly connected to the bottom of the electric controller 26. The baffle plate 16 is used to control the water flow in the outlet pipe 15. An impurity recovery mechanism 3 is provided on the inner wall of the cleaner body 2. The impurity recovery mechanism 3 is used to recover the impurities flushed out of the heat exchanger. A sealing gasket 20 is fixedly connected around the outer wall of the baffle plate 16. The sealing gasket 20 is used to prevent water from overflowing the baffle plate 16. The shape of the sealing gasket 20 is the same as the size of the outer wall of the baffle plate 16.

[0034] Specifically, when backwashing the heat exchanger begins, the water pump is turned on, allowing water mixed with detergent from the cleaner body 2 to flow into the heat exchanger from the outlet pipe 15. The water in the heat exchanger flows to the lower right side of the cleaner body 2, carrying impurities into the cleaner body 2 for cleaning. As the water flows into the heat exchanger, some impurities are carried away and intercepted by the filter screen 12. The force generated by the water flow drives the impeller 9 to rotate, which in turn drives the rotating column 8, causing the cleaning brush 13 to clean the filter screen 12, preventing... Impurities are carried back into the heat exchanger. When the water flow is insufficient to drive the impeller 9, the servo motor 6 is activated via the control panel 25, which in turn drives the rotating column 8 and the cleaning brush 13 to rotate, thus avoiding energy waste. The flexible coupling 7 has a certain degree of elasticity and flexibility. When the impeller 9 is driven to rotate with the assistance of the water flow, the torque is transmitted to the output end of the servo motor 6 through the flexible coupling 7. Due to the connecting effect of the flexible coupling 7, the connecting part of the servo motor 6 will rotate with the rotation of the impeller 9 driven by the water flow, and can buffer the impact force on the cleaning brush 13 when the water flows through.

[0035] Reference Figure 5 , Figure 6 and Figure 7 The impurity recovery mechanism 3 includes a second motor protective shell 301, which protects the rotating motor 302. The front of the second motor protective shell 301 is fixedly connected to the front of the inner wall of the cleaner body 2. The rotating motor 302 is fixedly connected to the top of the inner wall of the second motor protective shell 301. The rotating motor 302 allows the actuating plate 307 to move. A gear 303 is fixedly connected to the output end of the rotating motor 302. A groove 304 is provided in the lower middle part of the inner wall of the cleaner body 2. The groove 304 provides space for the slider 305 to rotate. The slider 305 is slidably connected to the inner wall of the groove 304. 305 is used to transmit the power of the rotating motor 302. A rack 306 is fixedly connected to the inner wall of the slider 305. A toggle plate 307 is fixedly connected to the bottom end of the slider 305. The toggle plate 307 is used to push the impurities falling on the bottom wall of the cleaner body 2 into the impurity recovery column 308. The impurity recovery column 308 is threadedly connected to the middle of the bottom wall of the cleaner body 2. The impurity recovery column 308 is used to recover the impurities backwashed from the heat exchanger. Two opening slots 19 are opened at the bottom end of the impurity recovery column 308. The inner walls of the two opening slots 19 are polished. The two opening slots 19 facilitate the opening of the impurity recovery column 308.

[0036] Specifically, when impurities in the heat exchanger fall into the inner bottom wall of the cleaner body 2 as they are washed by the water flow, the rotating motor 302 is started via the control panel 25, which in turn causes the gear 303 to rotate synchronously. Because the gear 303 and the rack 306 are meshed, the slider 305 rotates in the slide groove 304 under the drive of the rack 306. Since the lower end of the slider 305 is fixedly connected to the actuating plate 307, the actuating plate 307 can move the impurities on the inner bottom wall of the cleaner body 2, and under the drive of the water flow, the impurities fall into the gap in the middle of the impurity recovery column 308. After cleaning, the water in the cleaner body 2 is drained, and the cover slot 19 is screwed on to make the impurity recovery column 308 fall off the bottom wall of the cleaner body 2. The impurities in the gap of the impurity recovery column 308 are cleaned and recovered, and then screwed back to its original position. This completes the cleaning and recovery of impurities in the heat exchanger. The structure is simple and convenient.

[0037] Reference Figure 1 and Figure 2 An observation port 17 is provided on the front side of the main body 2 of the cleaner. An observation window 18 is fixedly connected to the inner wall of the observation port 17. The observation window 18 is used to observe the status of the main body 2 of the cleaner. Multiple support columns 21 are fixedly connected to the bottom of the base 1. The multiple support columns 21 lift the device off the ground, which facilitates the rotation of the impurity recovery column 308 and also prevents the device from being damaged by moisture. A lifting device 22 is fixedly connected to the middle of each of the multiple support columns 21. The multiple lifting devices 22 facilitate the lifting and lowering of the device. A control console 24 is fixedly connected to the front top of the base 1. A control panel 25 is fixedly connected to the top of the control console 24. Through the control panel 25, the staff can remotely control the operation of the equipment. Anti-slip sleeves 23 are fixedly connected to the bottom of each of the multiple support columns 21. The front and rear anti-slip sleeves 23 are symmetrical to each other. The multiple anti-slip sleeves 23 are used to prevent the device from shifting.

[0038] Specifically, after the device is started, the staff can observe the condition inside the main body 2 of the cleaner through the observation window 18 to determine the cleaning status. When it is necessary to clean the impurities in the impurity recovery column 308, if the height of the support column 21 is insufficient, the height of the base 1 can be raised by adjusting the lifting device 22 to facilitate the cleaning of the impurity recovery column 308. Multiple anti-slip sleeves 23 can prevent the device from moving easily when the ground is too slippery, thus enhancing the stability of the device. The control panel 25 allows the staff to remotely control the rotating motor 302, servo motor 6, vibrator 14, lifting device 22 and electric controller 26.

[0039] Working principle: To prevent impurities accumulated in the heat exchanger within the main body 2 of the cleaner from falling back into the heat exchanger, a filter screen 12 is used for isolation. When water flows towards the heat exchanger, the water flow drives the impeller 9, which in turn causes the cleaning brush 13 on the left side to scrub the filter screen 12. When water flows towards the main body 2 of the cleaner, the cleaning brush 13 on the right side scrubs the filter screen 12. When the water flow rate is too low, the servo motor 6 is activated via the control panel 25, driving the cleaning brush 13 to clean the filter screen 12. The flexible coupling 7 has a certain degree of elasticity and flexibility, which can compensate for misalignment, skewness and vibration between the servo motor 6 and the water flow driven impeller 9 to a certain extent. When the water flow driven impeller 9 rotates with the assistance of water flow, it will transmit the torque to the output end of the servo motor 6 through the flexible coupling 7. Due to the connection effect of the flexible coupling 7, the connection part of the servo motor 6 will rotate with the rotation of the water flow driven impeller 9 and can move slightly left and right, reducing the wear caused by the cleaning brush 13 constantly brushing the filter screen 12.

[0040] After the device is started, the rotating motor 302 is started via the control panel 25, causing the gear 303 to rotate synchronously. Since the gear 303 is meshed with the rack 306, the rack 306 also rotates. Since the rack 306 is fixedly connected to the inner wall of the slider 305, the slider 305 also rotates in the groove 304. Since the lower end of the slider 305 is fixedly connected to the agitator plate 307, the agitator plate 307 can move the impurities on the bottom wall of the cleaner body 2. Since there is a stirring component inside the cleaner body 2 for mixing the cleaning agent and water, after the stirring component is started, the water flows to the middle of the cleaner body 2, and the impurities fall into the impurity collection column 308 under the action of the water flow. The staff only needs to take out the impurity collection column 308 to complete the cleaning and re-collection of impurities in the heat exchanger.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat exchanger backwashing device, comprising a base (1) and a cleaner body (2), characterized in that: The right end of the main body (2) of the cleaner is connected to a water outlet pipe (15). A support frame (4) is fixedly connected to the left side of the inner wall of the water outlet pipe (15). A motor protective shell (5) is fixedly connected to the top of the support frame (4). A servo motor (6) is fixedly connected to the inner wall of the motor protective shell (5). A flexible coupling (7) is fixedly connected to the output end of the servo motor (6). A water flow drive impeller (9) is fixedly connected to the right end of the flexible coupling (7). A rotating column (8) is fixedly connected to the right end of the water flow drive impeller (9). Two cleaning brushes (13) are fixedly connected to the right side of the outer wall of the rotating column (8). Multiple fixing rods (10) are fixedly connected to the middle of the inner wall of the water outlet pipe (15), and guide cylinders (11) are fixedly connected to the other end of each fixing rod (10). A filter screen (12) is fixedly connected to the right side of the inner wall of the water outlet pipe (15). A vibrator (14) is fixedly connected to the front left end of the filter screen (12). An electric controller (26) is fixedly connected to the right side of the outer wall of the water outlet pipe (15). A baffle plate (16) is fixedly connected to the bottom end of the electric controller (26). An impurity recovery mechanism (3) is provided on the inner wall of the main body (2) of the cleaner. The impurity recovery mechanism (3) is used to recover the impurities flushed out of the heat exchanger.

2. The heat exchanger backwashing device according to claim 1, characterized in that: The impurity recovery mechanism (3) includes a motor protective shell (301), the front side of which is fixedly connected to the front side of the inner wall of the cleaner body (2). A rotating motor (302) is fixedly connected to the top of the inner wall of the motor protective shell (301). A gear (303) is fixedly connected to the output end of the rotating motor (302). A sliding groove (304) is provided in the lower middle part of the inner wall of the cleaner body (2). A slider (305) is slidably connected to the inner wall of the sliding groove (304). A rack (306) is fixedly connected to the inner wall of the slider (305). A toggle plate (307) is fixedly connected to the bottom end of the slider (305). An impurity recovery column (308) is threadedly connected to the middle of the bottom wall of the cleaner body (2).

3. The heat exchanger backwashing device according to claim 1, characterized in that: An observation port (17) is provided on the front side of the main body (2) of the cleaner, and an observation window (18) is fixedly connected to the inner wall of the observation port (17).

4. A heat exchanger backwashing device according to claim 1, characterized in that: The bottom of the base (1) is fixedly connected to a plurality of support columns (21), and a lifter (22) is fixedly connected to the middle of each of the plurality of support columns (21).

5. A heat exchanger backwashing device according to claim 1, characterized in that: A console (24) is fixedly connected to the top front side of the base (1), and a control panel (25) is fixedly connected to the top of the console (24).

6. A heat exchanger backwashing device according to claim 2, characterized in that: The impurity recovery column (308) has two opening grooves (19) at its bottom end, and the inner walls of the two opening grooves (19) are polished.

7. A heat exchanger backwashing device according to claim 1, characterized in that: A sealing gasket (20) is fixedly connected around the outer wall of the water baffle (16), and the shape of the sealing gasket (20) is the same as the size of the outer wall of the water baffle (16).

8. A heat exchanger backwashing device according to claim 4, characterized in that: The bottom ends of the multiple support columns (21) are fixedly connected with anti-slip sleeves (23), and the anti-slip sleeves (23) on the front and rear sides are symmetrical to each other.

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