Heat exchanger cleaning device

Abstract

The utility model provides a heat exchanger cleaning device and belongs to the technical field of cleaning. Comprising a base and a water pump, a cleaning device is arranged on the surface of the base and used for cleaning the inner wall of the tubular heat exchanger, the cleaning device comprises a conveying pipe, the conveying pipe is fixedly connected to the output end of the water pump, and a supporting frame is fixedly arranged on the surface of the base and fixed to the outer side wall of the conveying pipe; the end, away from the water pump, of the conveying pipe is connected with a high-pressure spray head, and a scraping structure is installed on the outer side wall of the high-pressure spray head and used for scraping dirt on the inner wall of the tubular heat exchanger. The cleaning device is arranged, stubborn dirt such as incrustation, rust and sediment attached to the inner wall can be scraped off in the mode that a rotating head, an extrusion plate and high-pressure water flow flushing are combined, the scraped dirt can be thoroughly flushed and discharged through high-pressure water flow, and the cleaning efficiency is remarkable.

Description

TECHNICAL FIELD

[0001] The utility model relates to cleaning technical field, especially a kind of heat exchanger cleaning device. BACKGROUND

[0002] Tubular heat exchanger is commonly used heat transfer equipment in industrial production (such as chemical industry, power, food processing etc.), and energy transfer is realized through the heat exchange of fluid inside and outside tube. But in the long-term use process, the inner wall of tube is easy to form scale, rust layer, dirt and other adhesion layers due to impurities in fluid, mineral precipitation, microbial growth and other factors. These adhesion layers can cause the following problems: the thermal conductivity of dirt is much lower than metal pipe material, which can significantly increase thermal resistance, reduce the heat transfer efficiency of heat exchanger, lead to energy consumption increase, dirt adhesion may cause inner wall corrosion (such as under-deposit corrosion), long-term accumulation can cause pipe thinning, damage, increase equipment maintenance cost and replacement frequency, the existing heat exchanger cleaning equipment only relies on high-pressure water flow to impact dirt, and it is difficult to completely remove hard scale such as scale and rust layer which is firmly adhered, so the cleaning effect is unstable. Therefore, the present application provides a kind of heat exchanger cleaning device to meet the needs. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a kind of heat exchanger cleaning device to solve the technical problem that the existing heat exchanger cleaning equipment only relies on high-pressure water flow to impact dirt, and it is difficult to completely remove hard scale such as scale and rust layer which is firmly adhered, so the cleaning effect is unstable.

[0004] To solve the above technical problems, the utility model provides the following technical scheme:

[0005] A kind of heat exchanger cleaning device, including base and water pump, the surface of base has cleaning device, and cleaning device is used to clean the inner wall of tubular heat exchanger;

[0006] The cleaning device includes a delivery pipe, which is fixedly connected to the output end of the water pump. The surface of the base is fixedly provided with a support frame, and the outer side wall of the delivery pipe is fixedly connected to the support frame. The end of the delivery pipe away from the water pump is connected to a high-pressure spray head. The outer side wall of the high-pressure spray head is provided with a scraping structure. The scraping structure is used to scrape the dirt on the inner wall of the tubular heat exchanger.

[0007] Preferably, the scraping structure includes a fixed hoop, the inner wall of the fixed hoop is slidably provided with a steel wire, one end of the steel wire is fixedly provided with a fixed rod, the end of the fixed rod away from the steel wire is inserted with a fixed ring, the inner wall of the fixed ring is rotatably provided with a rotating shaft, the outer side wall of the rotating shaft is equidistantly fixedly provided with an impeller, the outer side wall of the rotating shaft is also fixedly provided with a rotating head, the two sides of the support frame are rotatably provided with a rotating rod, the outer side wall of the rotating rod is fixedly provided with a wire reel, and the steel wire is wound on the outer side wall of the wire reel.

[0008] Preferably, the outer side wall of the fixed ring is fixedly provided with an extrusion plate, the extrusion plate is gradually inclined from the side close to the fixed ring to the side close to the rotating head, and the extrusion plate is made of synthetic rubber.

[0009] Preferably, the rotating head is conical, and the outer side wall of the rotating head is provided with a spiral guide structure.

[0010] Preferably, the input end of the water pump is connected with a water inlet pipe, and the outer side wall of the water inlet pipe is fixedly provided with a flange.

[0011] Preferably, one end of the rotating rod extends to the outside of the support frame and is fixedly provided with a handle, and the handle is used to drive the rotating rod to rotate to wind or unwind the steel wire.

[0012] Compared with the prior art, the utility model has at least the following beneficial effects:

[0013] In the above scheme, the combination of the rotating head, the extrusion plate and the high-pressure water flow flushing can not only scrape off stubborn dirt such as scale, rust marks and sediments attached to the inner wall, but also can completely flush out the scraped dirt through the high-pressure water flow, and the cleaning efficiency is significantly improved.

[0014] The conical design of the rotating head and the spiral guide structure cooperate with rotation, can cover different positions of the inner wall of the heat exchanger, and avoid cleaning dead angles.

[0015] The adjustment of the steel wire winding and unwinding through the handle can adjust the contact degree of the scraping structure and the inner wall, can adapt to the tubular heat exchanger with different pipe diameters, and can flexibly adjust the scraping strength according to the thickness of the dirt. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings constituting part of the specification show embodiments of the present disclosure, and together with the specification further serve to explain the principles of the present disclosure, and enable a person skilled in the relevant art to implement and use the present disclosure.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the water pump, the conveying pipe and the base of the utility model;

[0019] Figure 3 It is a schematic diagram of the Figure 2 It is an enlarged view of A in the middle;

[0020] Figure 4 It is a schematic diagram of the high-pressure water pipe, the fixed hoop and the steel wire of the utility model;

[0021] Figure 5 It is a schematic diagram of the rotating head, the rotating shaft and the impeller of the utility model.

[0022] Reference signs

[0023] 1, base; 2, water pump; 3, cleaning device; 301, conveying pipe; 302, support frame; 303, high-pressure spray head; 4, scraping structure; 401, fixed hoop; 402, steel wire; 403, fixed rod; 404, fixed ring; 405, rotating shaft; 406, impeller; 407, rotating head; 408, rotating rod; 409, wire reel; 5, extrusion plate; 6, spiral guide structure; 7, water inlet pipe; 8, crank handle; 9, spiral elevator.

[0024] As shown in the drawings, in order to clearly realize the structure of the embodiments of the utility model, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the utility model in the specific structure, device and environment, according to the specific need, the ordinary skilled in the art can adjust or modify these devices and environment, and the adjustment or modification still includes in the range of the appended claims. DETAILED DESCRIPTION

[0025] The heat exchanger cleaning device provided by the utility model will be described in detail below in combination with the drawings and specific embodiments. It should be noted that the following embodiments are the best and preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement some known technologies; moreover, the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the utility model.

[0026] As Figures 1-5 shown, the embodiment of the utility model provides a heat exchanger cleaning device 3, comprising a base 1 and a water pump 2, the water pump 2 is fixedly arranged on the surface of the base 1, the overall structure is compact and the function is perfect, mainly by the base 1, the water pump 2 and the cleaning device 3 and other core parts are constituted, each part cooperates, realizes the high-efficiency cleaning of the inner wall of the tubular heat exchanger.

[0027] The base 1 is the basic supporting component of the whole device, providing a stable mounting platform for all the equipment above, ensuring that the device does not shake during the cleaning process, and ensuring the smooth progress of the cleaning work. The bottom of the base 1 is also equipped with a screw elevator 9, which can adjust the height of the entire device when facing different height heat exchangers for cleaning. It is composed of a lead screw, a nut, an outer shell and a knob. The lead screw is directly fixed to the base 1, the nut is nested on the lead screw and fixed to the outer shell of the elevator, and the knob is installed on the outer shell or the nut. When the knob is turned, it will rotate the nut synchronously. The outer shell, as the fixed end of the elevator, can be placed on the ground, workbench or other base surface or indirectly fixed to the ground. Manual rotation of the knob transmits the rotational force of the knob to the nut fixed thereto, causing the nut to rotate around the lead screw (the nut itself rotates, and its position does not deviate in the horizontal direction). The threads on the surface of the lead screw and the inner wall of the nut are completely matched. When the nut rotates, the lead screw is fixed to the base 1 and cannot rotate or move relative to the base. The rotational motion of the nut is constrained by the threads and is converted into linear motion of the nut relative to the lead screw. If the nut rotates clockwise, it will climb up the lead screw; if it rotates counterclockwise, it will descend. The outer shell moves away from the base or the base rises relative to the outer shell. Because the nut is fixed to the outer shell, the linear motion of the nut directly drives the outer shell to move synchronously. If the outer shell is placed on the ground (the base surface is fixed), when the nut drives the outer shell to move downward along the lead screw, the outer shell will move away from the base 1 (equivalent to the base 1 rising relative to the ground). If the outer shell is not fixed (only as a support), when the outer shell moves downward, it will be "lifted" by the ground reaction force, and the lead screw is fixed to the base 1, which will eventually drive the base 1 to rise. The threads of the screw elevator have self-locking property, so the nut will not automatically rotate in the opposite direction due to the weight of the base 1 after the knob is stopped. Therefore, the base 1 can be stably stopped at the adjusted height and will not automatically descend. This is a conventional technical means, and will not be described in detail here.

[0028] The water pump 2 is one of the power sources of the device, and its input end is connected with the water inlet pipe 7. The outer side wall of the water inlet pipe 7 is fixedly provided with a flange plate. The flange plate enables the water inlet pipe 7 to be firmly connected with the external water source pipe, ensuring the stability and sealing of water supply, preventing water leakage during water pumping, and ensuring that the water pump 2 can continuously and stably pump the water needed for cleaning.

[0029] The cleaning device 3 is a key part to realize the cleaning function, and is used for cleaning the inner wall of the tubular heat exchanger. The cleaning device 3 comprises a conveying pipe 301, a high-pressure spray head 303, a scraping structure 4 and the like. The conveying pipe 301 is fixedly connected to the output end of the water pump 2. The surface of the base 1 is fixedly provided with a support frame 302. The support frame 302 is fixed to the outer side wall of the conveying pipe 301. This fixing mode not only plays a stabilizing role on the conveying pipe 301, but also ensures the position stability of the conveying pipe 301 during the working process, so as to avoid the deviation of the conveying pipe 301 due to water flow impact and the like. The one end of the conveying pipe 301 away from the water pump 2 is connected with the high-pressure spray head 303.

[0030] The scraping structure 4 is a core component for removing the dirt on the inner wall of the tubular heat exchanger, and can effectively scrape various dirt attached to the inner wall. The scraping structure 4 comprises a fixed hoop 401, a steel wire 402, a fixed rod 403, a fixed ring 404, a rotating shaft 405, an impeller 406, a rotating head 407, a rotating rod 408, a wire wheel 409 and the like. The inner wall of the fixed hoop 401 is slidably provided with the steel wire 402. The steel wire 402 can freely slide in the fixed hoop 401 along the axial direction of the tubular heat exchanger (the inner wall of the fixed hoop 401 is smooth and is matched with the steel wire 402, without any jamming or blocking structure). The sliding characteristic not only provides the possibility of position adjustment, but also can realize the stable and controllable position adjustment of the scraping component through a matched transmission structure. The specific adjustment process is as follows: the rotating rod 408 is rotatably arranged on the two sides of the support frame 302, the wire wheel 409 is fixed to the outer side wall of the rotating rod 408, and the handle 8 extends to the outside of the support frame 302. When the handle 8 is manually rotated, the handle 8 will synchronously drive the rotating rod 408 and the wire wheel 409 to rotate forward or reverse. Since the steel wire 402 is wound on the outer side wall of the wire wheel 409, the wire wheel 409 will tighten the steel wire 402 when rotating forward, and will loosen the steel wire 402 when rotating reverse, so that the steel wire 402 slides along the axial direction under the guidance of the fixed hoop 401. Further, the fixed rod 403 fixedly connected to one end of the steel wire 402, the fixed ring 404 (and the scraping components such as the rotating shaft 405, the impeller 406, the rotating head 407 and the extrusion plate 5 on the fixed ring 404) are synchronously moved along the axial direction of the tubular heat exchanger, so as to finally realize the accurate adjustment of the scraping structure at different positions in the pipeline, so as to adapt to different cleaning depths or adjust the contact degree between the scraping component and the inner wall of the heat exchanger.

[0031] The outer side wall of the fixed ring 404 is fixedly provided with 3-4 extrusion plates 5 (adapted to the contact requirements of different pipe diameters) in a circumferential direction. The extrusion plates 5 are gradually inclined at an angle of 15°-30° from the side close to the fixed ring 404 to the side close to the rotating head 407 (the inclination angle is adapted to the curvature of the inner wall of the pipeline, so as to be easily inserted into the pipeline with different diameters). In addition, the extrusion plates 5 are made of elastic synthetic rubber with a Shore hardness of 50-70HA (the hardness range has both elastic extension and structural strength).

[0032] Elasticity: The synthetic rubber has an elastic expansion allowance of 15%-25%. When the extrusion plate 5 enters the pipeline with different diameters (the adaptation range is 20-100mm) with the scraping assembly, the rubber material will adaptively elastically deform according to the pipe diameter. When the pipe diameter is small, the rubber is extruded and shrinks to maintain a moderate contact pressure. When the pipe diameter is large, the rubber naturally stretches to fill the gap between the pipe diameters, ensuring close contact with the inner wall.

[0033] Stability: The inclined plate surface cooperates with elastic deformation to form a line contact (rather than a point contact) between the extrusion plate 5 and the inner wall of the pipeline, increasing the contact area by more than 30%. This not only avoids excessive local pressure that can wear the inner wall, but also ensures stable scraping and extrusion effects under different pipe diameters, solving the problem of poor adhesion caused by pipe diameter differences and ensuring efficient cleaning of loose dirt.

[0034] The inner wall of the fixed ring 404 is rotationally provided with a rotating shaft 405, and the outer side wall of the rotating shaft 405 is equidistantly fixedly provided with an impeller 406. When water flows through, the impeller 406 will drive the rotating shaft 405 to rotate under the impact of the water flow. The outer side wall of the rotating shaft 405 is also fixedly provided with a rotating head 407, which is conically arranged and provided with a spiral guide structure 6 on the outer side wall. The conical design allows the rotating head 407 to more smoothly enter the internal pipe of the pipe heat exchanger, and the spiral guide structure 6 can guide and push the dirt in a certain direction when the rotating head 407 rotates, moving the scraped dirt in a specific direction for subsequent flushing.

[0035] The two sides of the support frame 302 are rotationally provided with a rotating rod 408, and the outer side wall of the rotating rod 408 is fixedly provided with a wire wheel 409. The steel wire 402 is wound on the outer side wall of the wire wheel 409. One end of the rotating rod 408 extends to the outside of the support frame 302 and is fixedly provided with a handle 8. The handle 8 is used to drive the rotating rod 408 to rotate to wind and unwind the steel wire 402. By rotating the handle 8, the rotating rod 408 and the wire wheel 409 are driven to rotate, thereby winding and unwinding the steel wire 402 to adjust the position of the scraping structure 4 in the pipe heat exchanger, meeting the cleaning needs of different positions.

[0036] In addition, the outer side wall of the fixed ring 404 is fixedly provided with an extrusion plate 5, which is gradually inclined from the side close to the fixed ring 404 to the side close to the rotating head 407. The extrusion plate 5 is made of synthetic rubber. The inclined extrusion plate 5 can better contact the inner wall of the pipe heat exchanger, and the synthetic rubber material has good elasticity and wear resistance, which can tightly adhere to the inner wall and reduce wear on the inner wall when in contact. It can also preliminarily clean and extrude some relatively loose dirt.

[0037] Working principle:

[0038] The working principle of the heat exchanger cleaning device 3 is based on the combination of mechanical scraping and high-pressure water flow flushing. Through the coordinated operation of various components, efficient removal of dirt on the inner wall of the tubular heat exchanger is achieved. The specific working process is as follows:

[0039] Preparation stage: First, connect the water inlet pipe 7 to the external water source pipe firmly through the flange on the outer wall of the water inlet pipe 7 to ensure normal water supply. Then, according to the size of the tubular heat exchanger, rotate the handle 8 to drive the rotating rod 408, which in turn drives the wire reel 409 to tighten or loosen the steel wire 402. When the steel wire 402 is tightened or loosened, it will move the fixed rod 403 and the fixed ring 404 and other components connected to it, thereby adjusting the contact between the rotating head 407 and the extrusion plate 5 in the scraping structure 4 and the inner wall of the tubular heat exchanger to achieve the appropriate cleaning position.

[0040] Cleaning stage: Start the water pump 2 to draw water from the external water source through the water inlet pipe 7. The water is pressurized by the water pump 2 and then delivered to the high-pressure spray head 303 through the delivery pipe 301. The high-pressure spray head 303 sprays high-pressure water onto the inner wall of the tubular heat exchanger for preliminary flushing.

[0041] At the same time, when the water flows near the fixed ring 404, it will impact the impeller 406, which will rotate the shaft 405 under the impact of the water flow. The shaft 405 rotates and in turn drives the rotating head 407 and the impeller 406 to rotate. The rotating head 407 is conical and has a spiral guide structure 6 on the outer wall. During rotation, it will scrape the dirt on the inner wall of the tubular heat exchanger. The spiral guide structure 6 can push the scraped dirt in a specific direction.

[0042] The extrusion plate 5 is made of synthetic rubber and is inclined. After the device enters the tubular heat exchanger, it will be in close contact with the inner wall. As the device moves and the rotating head 407 rotates, the extrusion plate 5 will further scrape and extrude the dirt on the inner wall, loosening some stubborn dirt.

[0043] Dirt removal: The dirt scraped by the rotating head 407 and the extrusion plate 5 is flushed out along the inner wall of the tubular heat exchanger under the continuous flushing of the high-pressure water flow and the pushing action of the spiral guide structure 6 of the rotating head 407, completing the entire cleaning process.

[0044] During the cleaning process, if it is necessary to adjust the position of the scraping structure 4 or the contact force with the inner wall, the handle 8 can be rotated again to tighten or loosen the steel wire 402 to adapt to different dirt conditions and cleaning needs.

[0045] The utility model covers any alternative, modification, equivalent method and scheme in the essence and range of the utility model. In order to make the public have the thorough understanding of the utility model, the specific details are explained in the above preferred embodiment of the utility model, and the utility model can also be completely understood without the description of these details to the person skilled in the art.

[0046] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. A heat exchanger cleaning device comprising a base (1) and a water pump (2), characterized in that, The surface of the base (1) has a cleaning device (3) for cleaning the inner wall of the tubular heat exchanger. The cleaning device (3) comprises a conveying pipe (301) fixedly connected to the output end of the water pump (2), the surface of the base (1) is fixedly provided with a support frame (302), the support frame (302) is fixed to the outer side wall of the conveying pipe (301), one end of the conveying pipe (301) away from the water pump (2) is connected with a high-pressure spray head (303), the outer side wall of the high-pressure spray head (303) is provided with a scraping structure (4), and the scraping structure (4) is used for scraping the dirt on the inner wall of the tubular heat exchanger. The scraping structure (4) comprises a fixed hoop (401), the inner wall of the fixed hoop (401) is slidably provided with a steel wire (402), one end of the steel wire (402) is fixedly provided with a fixed rod (403), the end of the fixed rod (403) away from the steel wire (402) is inserted with a fixed ring (404), the inner wall of the fixed ring (404) is rotatably provided with a rotating shaft (405), the outer side wall of the rotating shaft (405) is equidistantly fixedly provided with an impeller (406), the outer side wall of the rotating shaft (405) is also fixedly provided with a rotating head (407), the both sides of the support frame (302) are rotatably provided with a rotating rod (408), the outer side wall of the rotating rod (408) is fixedly provided with a wire wheel (409), and the steel wire (402) is wound on the outer side wall of the wire wheel (409).

2. The heat exchanger cleaning apparatus of claim 1, wherein The outer side wall of the fixed ring (404) is fixedly provided with an extrusion plate (5), the extrusion plate (5) is gradually inclined from the side close to the fixed ring (404) to the side of the rotating head (407), and the extrusion plate (5) is made of synthetic rubber.

3. The heat exchanger cleaning apparatus of claim 2, wherein, The rotating head (407) is conical, and the outer side wall of the rotating head (407) is provided with a spiral guide structure (6).

4. The heat exchanger cleaning apparatus of claim 1, wherein, The input end of the water pump (2) is connected with a water inlet pipe (7), and the outer side wall of the water inlet pipe (7) is fixedly provided with a flange.

5. The heat exchanger cleaning apparatus of claim 1, wherein, One end of the rotating rod (408) extends to the outside of the support frame (302) and is fixedly provided with a crank handle (8), and the crank handle (8) is used for driving the rotating rod (408) to rotate to wind or unwind the steel wire (402).

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