Heat exchange tube descaling device

Abstract

This utility model relates to the field of pipeline descaling technology, and provides a heat exchanger tube descaling device, including a base and a water tank installed on the base for storing cleaning fluid; a heater fixedly installed in the water tank for heating the cleaning fluid; a temperature sensor installed in the water tank for monitoring the temperature of the cleaning fluid; and a water pump fixedly installed on the base for pumping the cleaning fluid into the heat exchanger tube. Connecting pipes are installed on both the drain end of the water pump and the water tank, and the inlet end of the water pump is fixedly connected to the water tank. The heat exchanger tube descaling device provided by this solution, through the setting of a mesh screen, can effectively intercept dirt and prevent it from being pumped back into the heat exchanger tube by the water pump, greatly reducing the risk of pipeline blockage and ensuring the continuity and stability of the cleaning process.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline descaling technology, and in particular relates to a heat exchanger tube descaling device. Background Technology

[0002] Heat exchangers, as key equipment for exchanging heat between cold and hot fluids, are widely used in many industrial and civil fields. During the long-term operation of heat exchangers, heat exchange tubes, as their core components, bear the important task of heat transfer. However, most common heat exchange tubes currently use a serpentine tube structure, and the bending characteristics of the serpentine tubes make cleaning and maintenance extremely inconvenient. Regarding the problem of fouling inside the heat exchange tubes, existing descaling methods mostly use chemical cleaning. Specifically, a 5%-10% concentration of cleaning solution is injected into the heat exchange tubes through a pumping system and circulated inside the tubes for 2-6 hours to remove the fouling.

[0003] However, in traditional descaling devices, as the cleaning fluid flows through the pipes during the circulation process, the scale that was originally attached to the heat exchange tubes will be flushed off during subsequent circulations. Traditional descaling devices do not have an isolation function, which leads to the scale that has been flushed out being pumped back into the heat exchange tubes. When this scale that has re-entered the pipes comes into contact with the scale that has not yet been flushed off, the two accumulate with each other, which will rapidly increase the risk of blockage in the pipes and easily lead to pipe blockage. Utility Model Content

[0004] This invention provides a heat exchange tube descaling device, which aims to solve the problem that traditional descaling devices mentioned in the background art cannot isolate the scale that has been flushed off, causing the scale to re-enter the heat exchange tube and easily lead to pipe blockage.

[0005] To solve the above problems, this utility model is implemented as follows: a heat exchange tube descaling device includes: a base and a water tank installed on the base for storing cleaning fluid; a heater fixedly installed in the water tank for heating the cleaning fluid; a temperature sensor installed in the water tank for monitoring the temperature of the cleaning fluid; a water pump fixedly installed on the base for pumping the cleaning fluid into the heat exchange tube, with connecting pipes installed on both the drain end of the water pump and the water tank, and the inlet end of the water pump fixedly connected to the water tank; a partition screen slidably installed in the water tank for separating the water tank into a fouling isolation zone and a water storage zone, the partition screen being located below the inlet end of the water pump; and a controller located on one side of the water tank and a sampling mechanism located on the water tank for sampling the cleaning water.

[0006] Preferably, the sampling mechanism includes: a connecting box fixedly installed on one side of the water tank and connected to the water tank; a drain pipe fixedly installed at the bottom of the connecting box for sampling the cleaning water; a sealing plate slidably installed on the connecting box, the sealing plate being fitted with a sealing strip, the sealing strip being in close contact with the inner wall of the connecting box; and a sealing plug fixedly installed on one side of the sealing plate for sealing the opening on the water tank.

[0007] Preferably, the water tank is provided with a mixing mechanism for mixing the cleaning water. The mixing mechanism includes: a fixed box fixedly installed on one side of the water tank; an exhaust pipe installed on one side of the water tank and extending into the dirt isolation zone; a push plate slidably disposed in the fixed box for injecting air from the fixed box into the cleaning water to achieve stirring; a lead screw fixedly installed on one side of the push plate, the lead screw extending out of the fixed box; a threaded cylinder rotatably installed on one side of the fixed box, the threaded cylinder being threadedly connected to the lead screw; and a motor fixedly installed on one side of the fixed box, wherein bevel gears are fixedly sleeved on the output shaft of the motor coupling and the threaded cylinder, and the two bevel gears mesh with each other.

[0008] Preferably, a protective cover for protecting the motor and lead screw is fixedly installed on one side of the fixing box, the protective cover covering the lead screw and motor, and a cover plate is provided on one side of the water tank, the cover plate being located on one side of the partition net.

[0009] Preferably, a branch pipe is fixedly installed on one side of the fixed box, the branch pipe is connected to the exhaust pipe, a connecting pipe is installed on the branch pipe, a partition for sealing the exhaust passage of the connecting pipe is rotatably installed inside the connecting pipe, a return spring is installed at the bottom of the partition, and the bottom end of the return spring is fixedly connected to the inner wall of the connecting pipe.

[0010] Preferably, a stop block for limiting the partition is fixedly installed on one side of the inner wall of the connecting pipe, and the bottom of the stop block is in contact with the top of the partition.

[0011] Preferably, a fixing pipe is threaded onto the bottom end of the exhaust pipe, and a sealing mechanism is provided inside the fixing pipe. The sealing mechanism includes: an annular plate fixedly installed inside the fixing pipe; a circular plate disposed inside the annular plate for sealing the annular plate, a sealing ring being fitted on the circular plate and in close contact with the inner wall of the annular plate; a bracket fixedly installed inside the fixing pipe, the bracket being located above the circular plate, and a connecting spring fixedly installed on the bracket, the bottom end of the connecting spring being fixedly connected to the circular plate; and a guide rod fixedly installed at the top end of the circular plate, the guide rod slidingly passing through the connecting spring and the bracket.

[0012] Compared with related technologies, the heat exchange tube descaling device provided by this utility model has the following beneficial effects:

[0013] Compared with existing technologies, the heat exchange tube descaling device provided in this solution separates the water tank into a fouling isolation zone and a water storage zone by installing a sliding mesh inside the water tank. The mesh is located below the water pump inlet, which can effectively isolate fouling and prevent it from being drawn back into the heat exchange tube, reducing the risk of pipe blockage. Heating the cleaning water with a heater helps to accelerate the chemical reaction rate, improve cleaning efficiency, and better remove fouling from the heat exchange tube.

[0014] In summary, the heat exchange tube descaling device of this utility model, through the setting of the partition screen, can effectively intercept dirt and prevent it from being pumped back into the heat exchange tube by the water pump, greatly reducing the risk of pipe blockage and ensuring the continuity and stability of the cleaning process. Attached Figure Description

[0015] Figure 1 This is a front sectional view of a heat exchange tube descaling device provided by this utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of a heat exchange tube descaling device provided by this utility model;

[0017] Figure 3 This is an assembly drawing of the exhaust pipe, fixing box and push plate provided by this utility model;

[0018] Figure 4 This is a schematic diagram of the front sectional view of the sealing mechanism provided by this utility model;

[0019] Figure 5 for Figure 1 An enlarged structural diagram of part A shown in the figure;

[0020] Figure 6 for Figure 3 An enlarged structural diagram of part B shown in the figure;

[0021] Figure 7 for Figure 3 The diagram shows an enlarged view of section C.

[0022] Reference numerals: 1. Base; 2. Water tank; 3. Heater; 4. Temperature sensor; 5. Water pump; 6. Connecting pipe; 7. Partition mesh; 8. Controller; 9. Connecting box; 10. Drain pipe; 11. Sealing plate; 12. Sealing plug; 13. Fixing box; 14. Exhaust pipe; 15. Push plate; 16. Lead screw; 17. Threaded cylinder; 18. Motor; 19. Bevel gear; 20. Protective cover; 21. Branch pipe; 22. Connecting pipe; 23. Partition plate; 24. Return spring; 25. Stop block; 26. Fixing pipe; 27. Annular plate; 28. Circular plate; 29. ​​Bracket; 30. Connecting spring; 31. Guide rod; 32. Sealing ring; 33. Cover plate. Detailed Implementation

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order; the terms "inner," "outer," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] This utility model embodiment provides a heat exchanger tube descaling device, such as Figure 1-7 As shown, the heat exchange tube descaling device includes: a base 1 and a water tank 2 installed on the base 1 for storing cleaning fluid; a heater 3 fixedly installed in the water tank 2 for heating the cleaning fluid; a temperature sensor 4 installed in the water tank 2 for monitoring the temperature of the cleaning fluid; a water pump 5 fixedly installed on the base 1 for pumping the cleaning fluid into the heat exchange tube, with connecting pipes 6 installed on both the drain end of the water pump 5 and the water tank 2, and the water inlet end of the water pump 5 fixedly connected to the water tank 2; a partition 7 slidably installed in the water tank 2 to separate the water tank 2 into a dirt isolation zone and a water storage zone, the partition 7 being located below the water inlet end of the water pump 5; and a controller 8 located on one side of the water tank 2 and a sampling mechanism located on the water tank 2 for sampling the cleaning water.

[0026] In this embodiment, during operation, a sample is first taken from the heat exchange tube using a sampling device to detect the composition of the scale (such as calcium carbonate, calcium sulfate, silicate, biological slime, etc.) to determine the required cleaning agent. After determining the agent, various chemical materials are poured into the water tank 2 and mixed using a mixing mechanism. At the same time, the heater 3 heats the cleaning water.

[0027] After mixing, water pump 5 is started. Its inlet end draws cleaning solution from water tank 2, and its outlet end pumps the cleaning water into the heat exchange tube through connecting pipe 6. The cleaning water discharged from the other end of the heat exchange tube enters the dirt isolation zone formed by the partition 7 in water tank 2 through another connecting pipe 6. The partition 7 isolates the dirt and prevents it from being pumped back into the heat exchange tube by water pump 5. In addition, temperature sensor 4 in water tank 2 can monitor the temperature of the cleaning solution and feed the data back to controller 8 located on one side of water tank 2 to control the heating process. By setting the sliding partition 7 in water tank 2, the water tank 2 is separated into a dirt isolation zone and a water storage zone. The partition 7 is located below the inlet end of water pump 5, which can effectively isolate the dirt and prevent it from being pumped back into the heat exchange tube, reducing the risk of pipe blockage. Heating the cleaning water by heater 3 helps to accelerate the chemical reaction rate, improve cleaning efficiency, and better remove dirt from the heat exchange tube.

[0028] In a further preferred embodiment of this utility model, the sampling mechanism includes: a connecting box 9 fixedly installed on one side of the water tank 2 and communicating with the water tank 2; a drain pipe 10 fixedly installed at the bottom of the connecting box 9 for sampling the cleaning water; a sealing plate 11 slidably installed on the connecting box 9, the sealing plate 11 being fitted with a sealing strip, the sealing strip being in close contact with the inner wall of the connecting box 9; and a sealing plug 12 fixedly installed on one side of the sealing plate 11 for sealing the opening on the water tank 2.

[0029] In this embodiment, when the cleaning water circulates between the heat exchange tube and the water tank 2, it is necessary to periodically sample the water to monitor its pH value and solubility. During the sampling operation, the sealing plate 11 is pulled, which moves the sealing plug 12, causing the sealing plug 12 to disengage from the opening on the water tank 2. At this time, the cleaning water in the water tank 2 can flow into the connecting box 9 through the opening and then be discharged through the drain pipe 10 at the bottom of the connecting box 9, thus completing the sampling operation. By periodically sampling and monitoring the pH value and solubility of the cleaning water, the reaction state between the chemical agents and the dirt during the cleaning process can be grasped in real time, the cleaning effect can be understood, and the cleaning time and other parameters of the cleaning agent can be adjusted in a timely manner based on the monitoring results to ensure that the descaling work is carried out efficiently and thoroughly.

[0030] In a further preferred embodiment of this utility model, the water tank 2 is provided with a mixing mechanism for mixing cleaning water. The mixing mechanism includes: a fixed box 13 fixedly installed on one side of the water tank 2; an exhaust pipe 14 installed on one side of the water tank 2 and extending into the dirt isolation zone; a push plate 15 slidably disposed in the fixed box 13 for injecting air from the fixed box 13 into the cleaning water to achieve stirring; a lead screw 16 fixedly installed on one side of the push plate 15, the lead screw 16 extending out of the fixed box 13; a threaded cylinder 17 rotatably installed on one side of the fixed box 13, the threaded cylinder 17 being threadedly connected to the lead screw 16; and a motor 18 fixedly installed on one side of the fixed box 13, the output shaft of the motor 18 coupling and the threaded cylinder 17 both being fixedly fitted with bevel gears 19, the two bevel gears 19 meshing with each other.

[0031] In this embodiment, during the mixing operation, the motor 18 is started, and the output shaft of the coupling of the motor 18 drives the bevel gear 19 on it to rotate. Since the two bevel gears 19 mesh, they drive the threaded cylinder 17 to rotate. Because the threaded cylinder 17 is threadedly connected to the lead screw 16, the lead screw 16 will make linear motion during the rotation of the threaded cylinder 17, thereby driving the push plate 15 to slide in the fixed box 13. When the push plate 15 slides towards the water tank 2, it will inject the air in the fixed box 13 into the cleaning water in the water tank 2 through the branch pipe 21 and the exhaust pipe 14. The cleaning water is stirred and mixed by air bubbling, so that the various chemical materials in the water tank 2 are fully and evenly mixed. By adopting the air bubbling stirring method, compared with the traditional mechanical stirring, the gas can form a large number of small bubbles in the cleaning water and rise. During the rising process, the bubbles will drive the surrounding cleaning water to flow, so that the cleaning water in all positions in the water tank 2 can be fully mixed, ensuring that the chemical materials are evenly dispersed in the cleaning water, improving the quality of the cleaning water, and thus improving the cleaning effect on the dirt in the heat exchange tube.

[0032] In a further preferred embodiment of the present invention, a protective cover 20 for protecting the motor 18 and the lead screw 16 is fixedly installed on one side of the fixed box 13. The protective cover 20 covers the lead screw 16 and the motor 18. A cover plate 33 is provided on one side of the water tank 2. The cover plate 33 is located on one side of the partition net 7.

[0033] In this embodiment, the protective cover 20 provides good protection for the motor 18 and the lead screw 16, reducing the interference and damage caused by external environmental factors, lowering the equipment failure rate, and extending its service life. By opening the cover plate 33 to expose the operating port, the staff can directly clean the screen 7 or remove it for cleaning, thus improving the maintainability of the equipment.

[0034] In a further preferred embodiment of the present invention, a branch pipe 21 is fixedly installed on one side of the fixed box 13. The branch pipe 21 is connected to the exhaust pipe 14. A connecting pipe 22 is installed on the branch pipe 21. A partition 23 for sealing the exhaust passage of the connecting pipe 22 is rotatably installed inside the connecting pipe 22. A return spring 24 is installed at the bottom of the partition 23. The bottom end of the return spring 24 is fixedly connected to the inner wall of the connecting pipe 22.

[0035] In this embodiment, when the push plate 15 in the mixing mechanism performs the air extraction operation, the sealing mechanism in the fixed pipe 26 seals the fixed pipe 26 and the exhaust pipe 14 to prevent the cleaning water from being sucked into the fixed box 13. As the push plate 15 continues to reset, the space inside the fixed box 13 increases, causing the negative pressure in the branch pipe 21 to gradually increase. When the negative pressure reaches a certain level, it will exert a downward force on the partition 23, overcoming the elastic force of the reset spring 24, causing the partition 23 to rotate downward, thereby opening the channel of the connecting pipe 22. At this time, outside air can enter the fixed box 13 through the connecting pipe 22 and the branch pipe 21, preparing for the next push plate 15 to push air into the cleaning water for mixing. When the push plate 15 stops extracting air or changes its direction of movement, the reset spring 24 will restore its deformation, pushing the partition 23 to rotate upward, resealing the exhaust channel of the connecting pipe 22.

[0036] In a further preferred embodiment of the present invention, a stop 25 for limiting the partition 23 is fixedly installed on one side of the inner wall of the connecting pipe 22, and the bottom of the stop 25 is in contact with the top of the partition 23.

[0037] In this embodiment, during the operation of the mixing mechanism, when the pusher plate 15 performs the air pushing operation, the air in the fixed box 13 will pass through the branch pipe 21 and the connecting pipe 22 in sequence and enter the exhaust pipe 14 under the push of the pusher plate 15, and finally be injected into the cleaning water to achieve mixing. At this time, due to the presence of the baffle 25, it plays a limiting role on the partition 23, effectively preventing the partition 23 from rotating upward under the action of gas pressure. This ensures that the gas can be smoothly discharged through the connecting pipe 22, and the normal flow of gas will not be affected by the accidental rotation of the partition 23, so that the gas can be stably and efficiently discharged into the exhaust pipe 14.

[0038] In a further preferred embodiment of this utility model, a fixing pipe 26 is threadedly installed at the bottom end of the exhaust pipe 14. A sealing mechanism is provided inside the fixing pipe 26. The sealing mechanism includes: an annular plate 27 fixedly installed inside the fixing pipe 26; a circular plate 28 disposed inside the annular plate 27 for sealing the annular plate 27, a sealing ring 32 sleeved on the circular plate 28, the sealing ring 32 being in close contact with the inner wall of the annular plate 27; a bracket 29 fixedly installed inside the fixing pipe 26, the bracket 29 being located above the circular plate 28, and a connecting spring 30 fixedly installed on the bracket 29, the bottom end of the connecting spring 30 being fixedly connected to the circular plate 28; and a guide rod 31 fixedly installed at the top end of the circular plate 28, the guide rod 31 slidingly penetrating the connecting spring 30 and the bracket 29.

[0039] In this embodiment, when the branch pipe 21 exhausts gas, gas with a certain pressure enters the fixed pipe 26. The gas pressure impacts the circular plate 28. Under the action of the gas pressure, the circular plate 28 overcomes the elastic force of the connecting spring 30, causing the guide rod 31 to slide downwards together. At the same time, the connecting spring 30 is stretched. As the circular plate 28 slides down, it moves away from the annular plate 27, causing a gap to appear at the annular plate 27. The channel of the fixed pipe 26 is opened, and the gas can be smoothly discharged into the water through the fixed pipe 26 to achieve the mixing of cleaning water and gas. After the gas is discharged, the connecting spring... Spring 30 resets under its own elastic force, causing circular plate 28 to rise until circular plate 28 is tightly fitted with annular plate 27 again, sealing annular plate 27 and making fixed pipe 26 sealed again. This effectively prevents cleaning water from being drawn into branch pipe 21 when negative pressure is generated when push plate 15 resets, ensuring the normal operation of the device. Through the tight fit between circular plate 28 and annular plate 27, and the auxiliary sealing of sealing ring 32, liquid can be effectively prevented from passing through when venting is not required, preventing cleaning water from flowing back into branch pipe 21 and vent pipe 14.

[0040] In summary, compared with related technologies, this device, through the setting of the screen, can effectively intercept dirt and prevent it from being pumped back into the heat exchange tubes by the water pump, greatly reducing the risk of pipe blockage and ensuring the continuity and stability of the cleaning process.

[0041] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A heat exchange tube descaling device, characterized by, include: A base and a water tank mounted on the base for storing cleaning fluid; A heater fixedly installed inside the water tank for heating the cleaning solution; A temperature sensor installed inside the water tank to monitor the temperature of the cleaning fluid; A water pump is fixedly installed on the base for pumping cleaning fluid into the heat exchange tube. Both the drain end of the water pump and the water tank are equipped with connecting pipes, and the inlet end of the water pump is fixedly connected to the water tank. A partition screen is slidably installed inside the water tank to separate the water tank into a dirt isolation zone and a water storage zone. The partition screen is located below the water inlet of the water pump. A controller located on one side of the water tank is provided on the water tank for sampling mechanism of the cleaning water.

2. The heat exchange tube cleaning device of claim 1, wherein The sampling mechanism includes: A connecting box that is fixedly installed on one side of the water tank and connected to the water tank; A drain pipe for taking cleaning water samples is fixedly installed at the bottom of the connection box; A sealing plate is slidably mounted on the connecting box, and a sealing strip is fitted on the sealing plate, the sealing strip being in close contact with the inner wall of the connecting box; A sealing plug is fixedly installed on one side of the sealing plate to seal the opening on the water tank.

3. The heat exchanger tube descaling device as described in claim 1, characterized in that, The water tank is equipped with a mixing mechanism for mixing the cleaning water, the mixing mechanism comprising: A fixed box is installed on one side of the water tank; An exhaust pipe installed on one side of the water tank and extending into the dirt isolation zone; A push plate slidably disposed inside the fixed box is used to inject air from the fixed box into the cleaning water to achieve stirring. A lead screw is fixedly installed on one side of the push plate, and the lead screw extends out of the fixing box; A threaded cylinder mounted on one side of the fixed box is rotated, and the threaded cylinder is threadedly connected to the lead screw; A motor is fixedly installed on one side of the fixed box. The output shaft of the motor coupling and the threaded cylinder are both fixedly fitted with bevel gears, and the two bevel gears mesh with each other.

4. The heat exchanger tube descaling device as described in claim 3, characterized in that, A protective cover for protecting the motor and lead screw is fixedly installed on one side of the fixed box. The protective cover covers the lead screw and motor. A cover plate is provided on one side of the water tank. The cover plate is located on one side of the partition net.

5. The heat exchanger tube descaling device as described in claim 3, characterized in that, A branch pipe is fixedly installed on one side of the fixed box. The branch pipe is connected to the exhaust pipe. A connecting pipe is installed on the branch pipe. A partition for sealing the exhaust passage of the connecting pipe is rotatably installed inside the connecting pipe. A return spring is installed at the bottom of the partition. The bottom end of the return spring is fixedly connected to the inner wall of the connecting pipe.

6. The heat exchanger tube descaling device as described in claim 5, characterized in that, A stop block for limiting the partition is fixedly installed on one side of the inner wall of the connecting pipe, and the bottom of the stop block is in contact with the top of the partition.

7. The heat exchanger tube descaling device as described in claim 3, characterized in that, The exhaust pipe is threaded with a fixing pipe at its bottom end. The fixing pipe contains a sealing mechanism, which includes: an annular plate fixedly installed inside the fixing pipe; a circular plate disposed inside the annular plate for sealing the annular plate, the circular plate being fitted with a sealing ring that is in close contact with the inner wall of the annular plate; a bracket fixedly installed inside the fixing pipe, the bracket being located above the circular plate, and a connecting spring fixedly installed on the bracket, the bottom end of the connecting spring being fixedly connected to the circular plate; and a guide rod fixedly installed at the top end of the circular plate, the guide rod slidingly passing through the connecting spring and the bracket.

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