Cleaning device for heat exchange tube of low-temperature air pre-heater

Abstract

The utility model discloses a low-temperature air pre-heater heat exchange tube cleaning device which comprises a main supporting table, a containing groove is formed in the middle of the main supporting table, a through hole is formed in one end of the lower portion of the main supporting table, the containing groove is communicated with the through hole, and a cleaning liquid assembly is fixedly arranged at one end of the upper portion of the main supporting table. A clamping assembly is fixedly arranged at the other end of the lower portion of the main supporting table, a driving motor is fixedly arranged in the middle of the upper portion of the main supporting table, a driving gear is rotationally connected to one end of the inner side of the containing groove, a driven gear is rotationally connected to the other end of the inner side of the containing groove, and a connecting disc is fixedly connected to the lower portion of the driven gear. The cleaning plate is quickly disassembled and assembled through the insertion hole in the side face of the clamping plate and the fastening screw rod, cleaning plates made of different materials such as nylon brushes and metal scraping pieces can be replaced conveniently according to the dirt type, the replacement process of the cleaning sleeve is further simplified through the clamping structure of the clamping ring and the connecting rod, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchanger tube cleaning equipment, specifically a heat exchanger tube cleaning device for a cryogenic air preheater. Background Technology

[0002] According to patent publication number CN211824043U, a heat exchange tube cleaning device is disclosed. This device places the bottom of a fixed clamping plate and a movable clamping plate on the outside and inside of the heat exchange tube, respectively. By cranking the hand crank, the fixed clamping plate and the movable clamping plate are clamped to one side of the heat exchange tube through the transmission screw. The movable ball is clamped to the inner and outer walls of the heat exchange tube. By moving the support plate, the entire device can make a circular motion along the heat exchange tube. At the same time, the cleaning support tube is driven by the compression of the first compression spring to drive the cleaning brush to stick to the inner wall of the heat exchange tube, replacing the traditional manual sticking.

[0003] The cleaning brushes and cleaning support pipes of this device are fixedly connected, making it impossible to replace the brushes with different materials or shapes according to the type of dirt or wear on the inner wall of the heat exchange tubes, thus limiting the adaptability of the cleaning process. The movable clamping plate requires manual adjustment of the clamping position by cranking the transmission screw, resulting in low operating efficiency and the clamping force relying on manual experience for control. Uneven clamping can easily cause the device to shift or damage the surface of the heat exchange tubes. In addition, when the device moves around the circumference of the heat exchange tubes, it is driven only by manually moving the support plate, lacking automated movement control, making it difficult to guarantee the uniformity and coverage of the cleaning path. Utility Model Content

[0004] The purpose of this utility model is to provide a cleaning device for heat exchange tubes of a low-temperature air preheater in order to solve the problems mentioned in the background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cleaning device for heat exchange tubes of a cryogenic air preheater, comprising: a main support platform, a placement groove in the middle of the main support platform, a through hole at one lower end of the main support platform, the placement groove communicating with the through hole, a cleaning fluid assembly fixedly installed at one upper end of the main support platform, a clamping assembly for clamping the outer arm of the heat exchange tube fixedly installed at the other lower end of the main support platform, a drive motor fixedly installed at the middle position above the main support platform, a drive gear and a driven gear rotatably connected inside the placement groove, the drive gear and the driven gear meshing with each other, the output end of the drive motor drivingly connected to the drive gear, a connecting plate fixedly connected below the driven gear, and a water pump fixedly connected at the other upper end of the main support platform, the inlet of the water pump being connected to the cleaning fluid assembly.

[0006] As a further embodiment of this utility model: a connecting rod is fixedly connected below the connecting plate, a retaining ring is fixedly snapped onto the surface of the connecting rod, a cleaning sleeve is fixedly snapped onto the inner side of the retaining ring, a spray pipe is fixedly connected to the infusion end below the water pump, and a cleaning component is fixedly connected to the outer side of the retaining ring.

[0007] The cleaning assembly includes a card plate fixedly connected to the outside of the retaining ring, a cleaning plate being movably engaged on the side of the card plate, and an insertion hole being provided on the surface of the card plate, into which a fastening screw is screwed.

[0008] As a further embodiment of this utility model: the cleaning fluid assembly includes a mounting base fixedly disposed above one end of the main support platform, a cleaning fluid tank being movably engaged at the middle position of the upper part of the mounting base, the mounting base being an arc-shaped bracket matching the bottom shape of the cleaning fluid tank, an adhesive strip being fixedly pasted to one end of the upper part of the mounting base, one end of the strap being fixed to the top of the mounting base by a fixing bolt, and the bottom of the other end being provided with adhesive cloth, which is bonded to the adhesive strip on the mounting base to form a bidirectional fixation of the cleaning fluid tank, an infusion pipe being fixedly connected to one side of the cleaning fluid tank, and the other end of the infusion pipe being fixedly connected to the inlet end of the water pump.

[0009] As a further embodiment of this utility model: the clamping assembly includes a vertical rod fixedly disposed below the main support platform near one end of the heat exchange tube, a sliding rod fixedly connected to the side of the vertical rod, the sliding rod being horizontally fixed to the side of the vertical rod, its axis being parallel to the mounting surface of the main support platform, a clamping plate being slidably connected below the sliding rod, the clamping plate sliding horizontally via the sliding rod, the sliding path being perpendicular to the axis of the heat exchange tube, and the spring being fixedly connected between the clamping plate and the vertical rod.

[0010] As a further embodiment of this utility model: an opening is provided between the driven gear and the connecting plate, and the spray pipe passes through the main support platform, the driven gear, the connecting plate and the through hole in sequence so that the spray pipe is sleeved in the cleaning sleeve. A spray port is provided on the side of the cleaning sleeve, and a sprayer is fixedly connected to the water outlet below the spray pipe. The position of the sprayer corresponds to the position of the spray port. The cleaning sleeve is coaxially inserted into the heat exchange tube, and its outer diameter is smaller than the inner diameter of the heat exchange tube. The spray port opened on the side wall faces the inner wall of the heat exchange tube.

[0011] The cleaning component is located outside the cleaning sleeve, and the outer surface of the cleaning plate is circumferentially attached to the inner wall of the heat exchange tube. The front end of the cleaning plate extends to the inlet of the heat exchange tube, and the rear end is flush with the end of the cleaning sleeve, so as to achieve full coverage cleaning. The cleaning sleeve and the cleaning component rotate synchronously along the axis of the heat exchange tube.

[0012] As a further embodiment of this utility model: the cleaning plate is located outside the cleaning sleeve, and the fastening screw passes through the insertion hole and the cleaning plate and is fixedly screwed to the retaining ring.

[0013] As a further embodiment of this utility model: one end of the strap is fixedly mounted above the mounting base by the fixing bolt, and the bottom of the other end of the strap is fixedly mounted with adhesive cloth.

[0014] As a further embodiment of this utility model: the clamp is used to fit against the outer wall of the heat exchange tube, the inner side of the clamp is an arc-shaped concave surface, the curvature of the concave surface matches the outer wall of the heat exchange tube, and the surface is provided with anti-slip texture or rubber pad layer to increase the clamping friction.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In this invention, the cleaning plate can be quickly disassembled and assembled via the insertion hole on the side of the clamping plate and the fastening screw, which makes it easy to replace the cleaning plate with a different material such as a nylon brush or a metal scraper according to the type of dirt. The snap-fit ​​structure between the retaining ring and the connecting rod further simplifies the replacement process of the cleaning sleeve and reduces maintenance costs.

[0017] The clamping assembly utilizes the elastic deformation characteristics of springs to allow the clamping plates to automatically adapt to the outer walls of heat exchange tubes of different diameters, achieving rapid clamping without manual adjustment. This design not only simplifies the operation process but also ensures the stability of the device during high-speed rotation through the rigid support of the uprights and slides, preventing displacement or detachment caused by vibration.

[0018] The spray pipe runs through the connecting plate and the inside of the cleaning sleeve to form a fully enclosed flow channel, which effectively prevents cleaning fluid leakage and ensures that high-pressure liquid is delivered to the inner wall of the heat exchange tube. The cleaning fluid assembly is doubly fixed to the cleaning fluid tank by straps and adhesive strips, which supports stable liquid supply to large-capacity tanks, reduces the frequency of liquid replenishment in the middle, and improves the ability to operate continuously. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the low-temperature air preheater heat exchange tube cleaning device described in this utility model;

[0020] Figure 2 This is a schematic diagram of the structure inside the placement tank in the low-temperature air preheater heat exchange tube cleaning device described in this utility model;

[0021] Figure 3 This is a schematic diagram of the cleaning sleeve in the low-temperature air preheater heat exchange tube cleaning device described in this utility model;

[0022] Figure 4 This is a schematic diagram of the cleaning components in a cryogenic air preheater heat exchanger tube cleaning device according to the present invention;

[0023] Figure 5 This is a schematic diagram of the clamping component in the cleaning device for heat exchange tubes of a cryogenic air preheater according to the present invention.

[0024] Figure 6 This is a schematic diagram of the cleaning fluid component in a low-temperature air preheater heat exchanger tube cleaning device according to the present invention.

[0025] In the diagram: 1. Main support platform; 2. Placement slot; 3. Through hole; 4. Cleaning fluid assembly; 5. Clamping assembly; 6. Drive motor; 7. Drive gear; 8. Driven gear; 9. Connecting plate; 91. Connecting rod; 10. Snap ring; 11. Cleaning sleeve; 12. Water pump; 13. Spray pipe; 14. Cleaning assembly; 141. Clamping plate; 142. Cleaning plate; 143. Insertion hole; 144. Fastening screw; 41. Placement seat; 42. Cleaning fluid tank; 43. Infusion tube; 44. Strap; 45. Fixing bolt; 46. Adhesive strip; 51. Upright pole; 52. Slide rod; 53. Clamping plate; 54. Spring. Detailed Implementation

[0026] 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.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0028] Reference Figures 1 to 6 In this embodiment of the utility model, a low-temperature air preheater heat exchange tube cleaning device includes: a main support platform 1 as the core support structure of the device, a gear transmission mechanism installed in the mounting groove 2 opened in the middle of its top, a drive gear 7 driven by a drive motor 6, the drive motor 6 fixed in the center of the top of the main support platform 1, its output shaft inserted into the mounting groove 2 and keyed to the drive gear 7, a driven gear 8 rotatably connected to the other side of the mounting groove 2 through a bearing and meshing with the drive gear 7 to form a gear transmission pair, a connecting plate 9 welded to the bottom of the driven gear 8, a through hole opened in the center of the connecting plate 9 for passing through the spray pipe 13, a through hole 3 opened at one end of the bottom of the main support platform 1, the through hole 3 communicating with the mounting groove 2 for the spray pipe 13 to pass through.

[0029] A connecting rod 91 is welded below the connecting plate 9. A retaining ring 10 is fixedly attached to the surface of the connecting rod 91 via a slot. The cleaning sleeve 11 is fixedly attached to the inner side of the retaining ring 10 via a flange structure. Multiple radial spray nozzles are evenly opened on the side wall of the cleaning sleeve 11. A retaining plate 141 is welded to the outer side of the retaining ring 10. An insertion hole 143 is opened on the side of the retaining plate 141. The cleaning plate 142 is inserted into the retaining plate 141 through the insertion hole 143 and is screwed to the retaining ring 10 through the fastening screw 144 of the through insertion hole 143 and the cleaning plate 142, so as to realize the quick installation and removal of the cleaning plate 142. The cleaning plate 142 is made of cleaning sponge material, and its outer surface protrudes from the outer wall of the cleaning sleeve 11 for contacting and scraping the inner wall of the heat exchange tube.

[0030] A cleaning fluid assembly 4 is fixedly installed at one end of the top of the main support platform 1. The assembly includes a mounting base 41 and a cleaning fluid tank 42. The mounting base 41 is an arc-shaped bracket. The bottom of the cleaning fluid tank 42 is embedded in the mounting base 41, and the top is fixed by a strap 44. One end of the strap 44 is locked to the top of the mounting base 41 by a fixing bolt 45, and the bottom of the other end is provided with an adhesive strip hook surface, which is bonded to the adhesive strip 46 on the surface of the mounting base 41 to form a double fixation. The cleaning fluid tank 42 is connected to the inlet end of the water pump 12 through a delivery pipe 43. The water pump 12 is fixed at the other end of the top of the main support platform 1, and its outlet end is connected to a spray pipe 13. The spray pipe 13 passes through the through hole 3, the driven gear 8 and the center hole of the connecting plate 9 of the main support platform 1 in sequence, and extends into the inside of the cleaning sleeve 11. A high-pressure sprayer is installed at the end to spray the cleaning fluid evenly to the spray port on the side wall of the sleeve.

[0031] A vertical support rod 51 is welded to the other end of the bottom of the main support platform 1. A sliding rod 52 is horizontally fixed to the side of the support rod 51. A sliding clamp 53 is sleeved on the sliding rod 52. The inner side of the clamp 53 is an arc-shaped concave surface that fits against the outer wall of the heat exchange tube. The outer side is connected to the support rod 51 by a spring 54. The preload of the spring 54 causes the clamp 53 to slide along the sliding rod 52 and adaptively clamp heat exchange tubes of different diameters. When the device is installed, the clamp 53 is squeezed by the outer wall of the heat exchange tube and compresses the spring 54 to form an elastic clamping force, ensuring that the device is stably fixed during the cleaning process.

[0032] The working principle of this utility model is as follows:

[0033] After the device is started, the drive motor 6 drives the active gear 7 to rotate, which in turn drives the driven gear 8 to rotate synchronously through gear meshing. The driven gear 8 transmits power to the retaining ring 10 through the connecting plate 9 and the connecting rod 91, causing the cleaning sleeve 11 and cleaning assembly 14 fixed on the outside of the retaining ring 10 to rotate around the axis of the heat exchange tube. The clamping assembly 5 uses the spring 54 to make the clamping plate 53 adaptively clamp the outer wall of the heat exchange tube, ensuring the device is stably fixed. The water pump 12 pumps the cleaning liquid in the cleaning liquid tank 42 into the spray pipe 13 through the delivery pipe 43. The high-pressure cleaning liquid is injected into the cleaning sleeve 11 through the sprayer and sprayed at multiple angles onto the inner wall of the heat exchange tube through the spray nozzles on the side wall of the sleeve. During this process, the rotation of the cleaning sleeve 11 drives the outer cleaning plate 142 to rotate synchronously. The cleaning plate 142 can be disassembled and installed by fastening the screw 144 on the side of the clamping plate 141. Its surface contacts the inner wall of the heat exchange tube and performs rotational scraping. Combined with the sprayed cleaning liquid, it achieves a dual cleaning effect of chemical dissolution and mechanical peeling. The spray pipe 13 penetrates the connecting plate 9 and the inside of the cleaning sleeve 11 to form a closed flow channel, ensuring the directional delivery of the cleaning liquid. The cleaning liquid assembly 4 is fixed to the cleaning liquid tank 42 by the strap 44 and the adhesive strip 46 to maintain the stability of continuous liquid supply. Throughout the process, the drive system, the cleaning system and the clamping system work together to achieve efficient cleaning of the inside of the heat exchange tube.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-temperature air preheater heat exchange tube cleaning device, characterized in that, Include: The main support platform (1), the middle of the main support platform (1) is provided with a placing groove (2), and the lower end of the main support platform (1) is provided with a through hole (3), the placing groove (2) and the through hole (3) are communicated, the upper end of the main support platform (1) is fixedly provided with a cleaning liquid assembly (4), the lower end of the main support platform (1) is fixedly provided with a clamping assembly (5) for clamping on the outer wall of the heat exchange pipe, the middle of the upper end of the main support platform (1) is fixedly provided with a driving motor (6), the inner side of the placing groove (2) is rotatably connected with a driving gear (7) and a driven gear (8), the driving gear (7) and the driven gear (8) are meshed with each other, the output end of the driving motor (6) is drivingly connected with the driving gear (7), the lower end of the driven gear (8) is fixedly connected with a connecting disc (9), the upper end of the main support platform (1) is fixedly connected with a water pump (12), and the water inlet of the water pump (12) is connected with the cleaning liquid assembly (4).

2. The low-temperature air preheater heat exchange tube cleaning device according to claim 1, characterized in that, The connecting disc (9) is fixedly connected with a connecting rod (91), the surface of the connecting rod (91) is fixedly clamped with a clamping ring (10), the inner side of the clamping ring (10) is fixedly clamped with a cleaning sleeve (11), the lower end of the water pump (12) is fixedly connected with a spraying pipe (13), and the outer side of the clamping ring (10) is fixedly connected with a cleaning assembly (14). The cleaning assembly (14) comprises a clamping plate (141) fixedly connected to the outer side of the clamping ring (10), the clamping plate (141) is movably clamped with a cleaning plate (142) on the side surface, and the surface of the clamping plate (141) is provided with a insertion hole (143), and the insertion hole (143) is screwed with a fastening screw (144).

3. The low-temperature air preheater heat tube cleaning device according to claim 2, characterized in that, The cleaning liquid assembly (4) comprises a placing seat (41) fixedly arranged at the upper end of the main support platform (1), a cleaning liquid tank (42) movably clamped with the upper end of the placing seat (41), the placing seat (41) is an arc-shaped bracket matched with the shape of the bottom of the cleaning liquid tank (42), a sticky strip (46) is fixedly attached to the upper end of the placing seat (41), a bandage (44) is fixed to the top of the placing seat (41) through a fixing bolt (45), and the other end is provided with a sticky cloth, which is attached to the sticky strip (46) on the placing seat (41), forming a bidirectional fixation of the cleaning liquid tank (42), one side of the cleaning liquid tank (42) is fixedly connected with a liquid conveying pipe (43), and the other end of the liquid conveying pipe (43) is fixedly connected with the liquid inlet end of the water pump (12).

4. The low-temperature air preheater heat exchange tube cleaning device according to claim 1, characterized in that, The clamping assembly (5) comprises a vertical rod (51) fixedly arranged below the main support table (1) near one end of the heat exchange pipe, the vertical rod (51) is fixedly connected with a slide rod (52) on the side, the slide rod (52) is horizontally fixed on the side of the vertical rod (51), the axis of the slide rod (52) is parallel to the mounting surface of the main support table (1), a clamping plate (53) is slidably connected below the slide rod (52), the clamping plate (53) slides along the horizontal direction through the slide rod (52), the sliding path is perpendicular to the axis of the heat exchange pipe, and the clamping plate (53) and the vertical rod (51) are fixedly connected with a spring (54).

5. The low-temperature air preheater heat tube cleaning device according to claim 2, characterized in that, The driving gear (8) and the connecting disc (9) are provided with a hole in the middle, the spraying pipe (13) penetrates the main support table (1), the driving gear (8), the connecting disc (9) and the through hole (3) in sequence, so that the spraying pipe (13) is sleeved in the cleaning sleeve (11), the cleaning sleeve (11) is provided with a spraying opening on the side, a sprayer is fixedly connected to the water outlet of the spraying pipe (13), the position of the sprayer corresponds to the position of the spraying opening, the cleaning sleeve (11) is coaxially inserted into the heat exchange pipe, the outer diameter of the cleaning sleeve (11) is smaller than the inner diameter of the heat exchange pipe, and the spraying opening in the side wall faces the inner wall of the heat exchange pipe; The cleaning assembly (14) is located outside the cleaning sleeve (11), the outer surface of the cleaning plate (142) is circumferentially attached to the inner wall of the heat exchange pipe, the front end of the cleaning plate (142) extends to the inlet of the heat exchange pipe, and the rear end is flush with the end of the cleaning sleeve (11), so that full coverage cleaning is realized, and the cleaning sleeve (11) and the cleaning assembly (14) rotate synchronously along the axis of the heat exchange pipe.

6. The low-temperature air preheater heat tube cleaning device according to claim 2, characterized in that, The cleaning plate (142) is located outside the cleaning sleeve (11), the fastening screw (144) penetrates the insertion hole (143) and the cleaning plate (142) and is fixedly screwed with the snap ring (10).

7. The low-temperature air preheater heat tube cleaning device according to claim 3, characterized in that, One end of the bandage (44) is fixedly arranged above the mounting seat (41) through the fixing bolt (45), and the other end of the bandage (44) is fixedly provided with an adhesive cloth at the bottom.

8. The low-temperature air preheater heat tube cleaning device according to claim 4, characterized in that, The inner side of the clamping plate (53) is an arc-shaped concave surface, the concave surface is matched with the outer wall of the heat exchange pipe, and the surface is provided with anti-skid lines or a rubber pad layer, so as to increase the clamping friction.

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