A heat collecting tube fouling cleaning device

Abstract

This invention relates to the field of solar collector tube cleaning, specifically to a solar collector tube fouling cleaning device. The device includes a base plate, a support box with a top opening mounted on the top of the base plate, and a casing located to the right of the support box. An upper tube conveying mechanism is installed inside the opening of the support box. A limiting mechanism is installed on the left side of the support box. An inner wall cleaning mechanism for cleaning the inner wall of the solar collector tube is installed on the left side of the casing. An outer wall cleaning mechanism for cleaning the outer wall of the solar collector tube is also installed on the left side of the casing. A cleaning drive mechanism for driving the inner and outer wall cleaning mechanisms is also installed on the left side of the casing. This invention utilizes an inner wall cleaning mechanism that flexibly abuts against the inner wall of the solar collector tube, cleaning the inner wall through reciprocating movement. Similarly, an outer wall cleaning mechanism flexibly abuts against the upper semicircular portion of the outer wall of the solar collector tube, cleaning the outer wall through reciprocating movement.

Description

Technical Field

[0001] This invention relates to the field of solar collector tube cleaning technology, and specifically to a device for cleaning fouling on solar collector tubes. Background Technology

[0002] Solar water heaters are currently a widely used type of solar energy device. They mainly heat water by absorbing sunlight through heat collection tubes. The solar heat collection tubes are double vacuum heat collection elements made of high borosilicate ultra-hard glass. The heat collection tube consists of a concentric glass inner tube and an outer tube, forming a vacuum cavity between the inner and outer tubes. The inner tube cavity maintains a low vacuum environment and encapsulates a liquid heat transfer medium. The tube wall is coated with a multi-metal carbide solar absorption film.

[0003] Solar water heaters are usually installed on the roof to facilitate long-term exposure to sunlight. After long-term use, a lot of dust or bird droppings will accumulate on the outer wall of the collector tubes, affecting the absorption of sunlight and heating efficiency. They are usually cleaned by wiping them manually.

[0004] In addition, during use, due to water quality and other factors, a large amount of scale will be deposited on the inner wall of the collector tube. The scale in the collector tube will seriously affect the heat conversion efficiency and reduce the water storage capacity inside the collector tube. Currently, there are two ways to clean the scale inside the collector tube: chemical cleaning and manual cleaning. The chemical cleaning method involves using a descaling agent to soften the scale inside the collector tube, then inverting the collector tube and tapping it to remove the scale through vibration. However, this cleaning method is very easy to damage the collector tube when tapping and vibrating, and it requires rinsing with clean water multiple times to remove residual agent.

[0005] The manual cleaning method involves removing the collector tubes, pouring out the internal water and some scale by turning the tubes upside down, and then gently scrubbing the inner wall with a long-handled brush or a special cleaning tool. Alternatively, a wad of cotton cloth can be tied to a wooden stick, dipped in water, and used to rub the inner wall in a circular motion. Finally, it can be rinsed with clean water. However, this method is only suitable for cases where a small amount of scale has accumulated on the inner wall. It cannot effectively clean stubborn scale deposits on the inner wall and may even push the scale to the bottom of the collector tube and compact it. Furthermore, the process can easily damage the collector tubes, causing them to crack. In addition, the cleaning efficiency is slow and requires a long cleaning time. Summary of the Invention

[0006] In view of the above situation and to overcome the defects of the prior art, the present invention provides a device for cleaning the fouling of heat collection pipes.

[0007] The technical solution adopted by the present invention is as follows: a device for cleaning scale on a heat collection tube, comprising a base plate, a support box with a top opening and a casing located on the right side of the support box, an upper tube conveying mechanism installed inside the opening of the support box, a limiting mechanism installed on the left side of the support box, an inner wall cleaning mechanism for cleaning the inner wall of the heat collection tube installed on the left side of the casing, an outer wall cleaning mechanism for cleaning the outer wall of the heat collection tube installed on the left side of the casing, and a cleaning drive mechanism for driving the inner wall cleaning mechanism and the outer wall cleaning mechanism installed on the left side of the casing.

[0008] Preferably, the upper tube conveying mechanism includes a plurality of equidistantly arranged V-shaped conveying rollers rotatably mounted between the front and rear inner walls of the support box. Each V-shaped conveying roller is coaxially fixedly mounted with a conveying sprocket set, and a conveying chain is installed between every two adjacent conveying sprocket sets. One of the V-shaped conveying rollers is connected to a conveying motor.

[0009] Preferably, the limiting mechanism includes two symmetrically positioned limiting slide rails installed on the left side of the support box. A limiting plate is slidably installed between the two limiting slide rails. A limiting spring sheet is installed between the bottom of the limiting plate and the base plate. A sealing nozzle groove is provided on the top of the limiting plate. A sealing nozzle protective cover is installed on the left side of the sealing nozzle groove. A fastening bolt is passed through and installed on one of the limiting slide rails. Bolt holes are provided on the limiting plate.

[0010] Preferably, the inner wall cleaning mechanism includes an inner wall reciprocating screw fixedly installed on the left side of the chassis. An inner wall cleaning disc with threaded engagement is installed on the outer side of the inner wall reciprocating screw. A plurality of oblique telescopic grooves are formed on the outer circumferential surface of the inner wall cleaning disc. An inner wall cleaning scraper is radially slidably installed in each oblique telescopic groove. A V-shaped spring is installed between each inner wall cleaning scraper and the bottom of the oblique telescopic groove. A scraper telescopic inclined surface is provided at one end of the inner wall cleaning scraper outside the oblique telescopic groove. An inner wall rubber block is installed on the end face of the inner wall cleaning scraper outside the oblique telescopic groove.

[0011] Preferably, an inner wall cleaning drive wheel is coaxially rotatably mounted on the outer side of the right end of the inner wall reciprocating screw, and an inner wall cleaning driven wheel is coaxially rotatably mounted on the outer side of the left end of the inner wall reciprocating screw. Two cleaning disc drive rods penetrating the inner wall cleaning disc are fixedly installed between the opposite sides of the inner wall cleaning drive wheel and the inner wall cleaning driven wheel.

[0012] Preferably, a sleeve is coaxially fixedly installed on the left end face of the inner wall reciprocating screw, and a push rod is axially slidably installed inside the sleeve. The left end of the push rod is located outside the left end of the sleeve and a rubber top block is fixedly installed thereon. A push rod spring is installed between the right end face of the push rod and the left end face of the inner wall reciprocating screw. A button is fixedly installed in the middle of the left end face of the inner wall reciprocating screw. A wire groove passes through the left and right end faces of the inner wall reciprocating screw. A wire is connected to the button. The wire passes through the wire groove and is placed inside the chassis and electrically connected to the controller inside the chassis.

[0013] Preferably, the outer wall cleaning mechanism includes an outer wall cleaning slide rod fixedly installed on the left side of the chassis and located above the reciprocating screw on the inner wall. An outer wall cleaning plate is axially slidably installed on the outer side of the outer wall cleaning slide rod. An outer wall telescopic box with a bottom opening is fixedly installed at the bottom of the outer wall cleaning plate. An outer wall telescopic block is slidably installed up and down inside the outer wall telescopic box. A telescopic spring is installed on the top surface of the outer wall telescopic block. An outer wall cleaning semi-ring is fixedly installed at the bottom of the outer wall telescopic block. An outer wall guide slope is provided on the left side of the outer wall cleaning semi-ring. An outer wall cleaning rubber layer is installed on the inner side of the outer wall cleaning semi-ring.

[0014] Preferably, an outer wall reciprocating screw located below the outer wall cleaning slide is rotatably mounted on the left side of the chassis. The outer wall reciprocating screw passes through the outer wall cleaning plate and is threadedly engaged with it. A support plate is installed on the left side of the chassis. The left end of the support plate is bent downward at 90°. The left ends of both the outer wall cleaning slide and the outer wall reciprocating screw are mounted on the support plate.

[0015] Preferably, the cleaning drive mechanism includes a cleaning drive motor installed inside the chassis. The output shaft of the cleaning drive motor extends to the outer side of the left side of the chassis and is coaxially fixedly mounted with a cleaning drive gear. An inner wall cleaning gear ring is coaxially fixedly mounted on the outer circumference of the inner wall cleaning drive wheel. An outer wall cleaning gear is coaxially fixedly mounted on the outer side of the right end of the outer wall reciprocating screw. Both the inner wall cleaning gear ring and the outer wall cleaning gear mesh with the cleaning drive gear.

[0016] Preferably, it also includes a sludge collection mechanism, which includes a through slot on the front side of the support box, a sludge collection box installed in the slot and placed inside the support box, the bottom surface of the sludge collection box being provided with a slope that is lower on the left and higher on the right, a number of filter screen holes being opened on the left side of the sludge collection box, and a drain pipe located on the left side of the sludge collection box being installed on the front side of the support box.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The inner wall cleaning mechanism used in this invention can flexibly contact the inner wall of the heat collection tube. When it rotates and moves back and forth in the left and right direction inside the heat collection tube, it can thoroughly clean the inner wall of the entire heat collection tube. This effectively solves the problem that when cleaning manually with a long-handled brush, it is impossible to effectively clean the stubborn scale deposited on the inner wall. It also prevents the scale from being pushed to the end of the heat collection tube and compacted. Furthermore, it is not easy to damage the heat collection tube during operation.

[0019] 2. The outer wall cleaning mechanism used in this invention can also move back and forth in the left and right directions. When the inner wall cleaning mechanism enters the heat collection tube to clean it, the outer wall cleaning mechanism first moves to the left and flexibly abuts against the upper half-circle of the outer wall of the heat collection tube. Then it moves back and forth on the outer wall of the heat collection tube to clean the outer wall of the heat collection tube. The outer wall cleaning mechanism can only abut against the upper half-circle of the outer wall of the heat collection tube. Therefore, when the heat collection tube is placed on the upper tube conveying mechanism for conveying, the side of the outer wall of the heat collection tube with dirt adhering to it can be placed facing upwards for conveying. This can effectively solve the problem that when the outer wall of the heat collection tube is covered with dirt such as dust or bird droppings, it affects the light absorption and heating efficiency of the heat collection tube.

[0020] 3. To prevent the reciprocating screw from puncturing the inner wall of the collector tube's tail end when it moves to the right, a rubber block for cushioning is installed at the left end of the reciprocating screw. When the inner wall of the collector tube's tail end comes into contact with the rubber block, it pushes the rubber block to the right, causing the push rod to slide into the sleeve and compress the push rod spring. This avoids a hard collision between the reciprocating screw and the inner wall of the collector tube, thus achieving a cushioning effect on the collector tube. At the same time, pressing the push rod button stops the conveyor motor, and the multiple V-shaped conveyor rollers stop conveying the collector tube, preventing the inner wall of the collector tube's tail end from being damaged by continuous pushing force. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0022] Figure 2 This is a front view schematic diagram of the present invention.

[0023] Figure 3 This is a three-dimensional schematic diagram of the present invention with the heat collection tube placed above the upper tube conveying mechanism.

[0024] Figure 4 This is a cross-sectional schematic diagram of the present invention when the heat collection tube is placed above the upper tube conveying mechanism.

[0025] Figure 5 For the present invention Figure 3 Enlarged view of point A in the middle.

[0026] Figure 6 For the present invention Figure 3Enlarged view of point B in the middle.

[0027] Figure 7 For the present invention Figure 4 Enlarged view of point C in the middle.

[0028] Figure 8 For the present invention Figure 4 Enlarged view of point D in the middle.

[0029] Figure 9 This is a cross-sectional schematic diagram of the inner wall cleaning mechanism of the present invention cleaning the inner and outer walls of the heat collection tube.

[0030] Figure 10 This is a schematic diagram of the structure of the inner wall cleaning disc and the inner wall cleaning scraper of the present invention.

[0031] In the picture:

[0032] 1. Base plate; 2. Support box; 3. Chassis;

[0033] 4. Upper tube conveying mechanism; 41. V-shaped conveyor roller; 42. Conveyor sprocket assembly; 43. Conveyor chain; 44. Conveyor motor;

[0034] 5. Limiting mechanism; 51. Limiting slide rail; 52. Limiting plate; 53. Limiting spring sheet; 54. Sealing nozzle protective cover; 55. Fastening bolt; 56. Bolt hole;

[0035] 6. Inner wall cleaning mechanism; 61. Inner wall reciprocating screw; 62. Inner wall cleaning disc; 63. Angled telescopic groove; 64. Inner wall cleaning scraper; 65. V-shaped spring; 66. Scraper telescopic inclined surface; 67. Inner wall rubber block; 611. Inner wall cleaning drive wheel; 612. Inner wall cleaning driven wheel; 613. Cleaning disc drive rod;

[0036] 7. External wall cleaning mechanism; 71. External wall cleaning slide bar; 72. External wall cleaning plate; 73. External wall telescopic box; 74. External wall telescopic block; 75. Telescopic spring; 76. External wall cleaning semi-ring; 77. External wall guide ramp; 78. External wall cleaning rubber layer; 79. External wall reciprocating screw;

[0037] 8. Clean the drive mechanism; 81. Clean the drive motor; 82. Clean the drive gears; 83. Clean the gear ring on the inner wall; 84. Clean the gears on the outer wall;

[0038] 9. Sleeve; 10. Top rod; 11. Rubber top block; 12. Top rod spring; 13. Button; 14. Wire; 15. Support pull plate; 16. Sludge collection box; 17. Filter screen; 18. Drain pipe. Detailed Implementation

[0039] The following will refer to the appendix. Figures 1-10The description provides a detailed description of various embodiments of the present invention.

[0040] Example 1: A device for cleaning fouling on heat collection tubes, as shown in the attached document. Figures 1-10 As shown, the device includes a base plate 1, which allows it to be placed at the operating site. The base plate 1 is placed on the ground to support subsequent structures. A support box 2 with a top opening and a housing 3 located on the right side of the support box 2 are installed on the top of the base plate 1. The housing 3 houses a controller and is electrically connected to a power source. An upper tube conveying mechanism 4 is installed inside the top opening of the support box 2. The heat collection tube to be cleaned can be placed on the upper tube conveying mechanism 4 with the tube opening facing the housing 3. The upper tube conveying mechanism 4 can convey the heat collection tube towards the housing 3. A limiting mechanism 5 is installed on the left side of the support box 2. An inner wall cleaning mechanism 6 for cleaning the inner wall of the heat collection tube is installed on the left side of the housing 3. An outer wall cleaning mechanism 7 for cleaning the outer wall of the heat collection tube is installed on the left side of the housing 3.

[0041] In use, first place the end of the heat collector tube at the leftmost end of the upper tube conveying mechanism 4, aligning the tube end with the inner wall cleaning mechanism 6. Then, start the upper tube conveying mechanism 4 to convey the heat collector tube towards the casing 3. During the conveying process, the inner wall cleaning mechanism 6 gradually enters the heat collector tube. When the leftmost end of the inner wall cleaning mechanism 6 abuts against the inner wall of the tail end of the heat collector tube, the upper tube conveying mechanism 4 stops conveying the heat collector tube. At this time, the limiting mechanism 5 can limit the tail end of the heat collector tube, preventing the heat collector tube from shifting to the left during the cleaning process. The inner wall cleaning mechanism 6 itself can rotate. It can rotate and move back and forth in the left and right directions. When the inner wall cleaning mechanism 6 enters the heat collection tube, it can abut against the inner wall of the heat collection tube. When it rotates, it can clean the scale on the inner wall of the heat collection tube. When it moves back and forth in the left and right directions inside the heat collection tube, it can thoroughly clean the inner wall of the entire heat collection tube. It effectively solves the problem that it is impossible to effectively clean the stubborn scale deposited on the inner wall when using a long-handled brush for manual cleaning. It will also prevent the scale from being pushed to the end of the heat collection tube and compacted. In addition, it is not easy to damage the heat collection tube during operation.

[0042] The outer wall cleaning mechanism 7 can also move back and forth in the left and right directions. When the inner wall cleaning mechanism 6 enters the heat collection tube to clean it, the outer wall cleaning mechanism 7 first moves to the left and abuts against the upper half of the outer wall of the heat collection tube. Then it moves back and forth on the outer wall of the heat collection tube to clean the outer wall of the heat collection tube. The outer wall cleaning mechanism 7 can only abut against the upper half of the outer wall of the heat collection tube. Therefore, when the heat collection tube is placed on the upper tube conveying mechanism 4 for conveying, the side of the outer wall of the heat collection tube with dirt adhering to it can be placed facing upwards and conveyed. This can effectively solve the problem that when the outer wall of the heat collection tube is covered with dirt such as dust or bird droppings, it affects the light absorption and heating efficiency of the heat collection tube.

[0043] The left side of the chassis 3 is equipped with a cleaning drive mechanism 8 for driving the inner wall cleaning mechanism 6 and the outer wall cleaning mechanism 7. The cleaning drive mechanism 8 is electrically connected to the controller and can simultaneously drive the inner wall cleaning mechanism 6 and the outer wall cleaning mechanism 7 to move back and forth in the left and right directions to perform cleaning work.

[0044] As attached Figures 1-5 As shown, the upper tube conveying mechanism 4 includes multiple equidistantly arranged V-shaped conveying rollers 41 rotatably mounted between the front and rear inner walls of the support box 2. The outer layer of the V-shaped conveying rollers 41 can be set as a rubber layer with high friction to prevent slippage or falling during the conveying of the heat collection tubes. Each V-shaped conveying roller 41 is coaxially fixedly mounted with a conveying sprocket set 42. The number of sprockets in each V-shaped conveying roller 41 is 2 sprockets. A conveying chain 43 is installed between each two adjacent conveying sprocket sets 42, so that the multiple V-shaped conveying rollers 41 can rotate synchronously. One of the V-shaped conveying rollers 41 is connected to a conveying motor 44 mounted on the support box 2. After the conveying motor 44 is started, it can drive the multiple V-shaped conveying rollers 41 to rotate synchronously. The conveying motor 44 is electrically connected to the controller, and its speed should not be too fast, otherwise the heat collection tubes may be damaged during the conveying process.

[0045] As attached Figure 1 , Figure 3 , Figure 5 , Figure 8 As shown, the limiting mechanism 5 includes two symmetrically positioned limiting slide rails 51 installed on the left side of the support box 2. The limiting slide rails 51 can be installed on the support box 2 by bolts or rivets. A limiting plate 52 is slidably installed between the two limiting slide rails 51. A limiting spring plate 53 is installed between the bottom of the limiting plate 52 and the base plate 1. In the free-released state of the limiting spring plate 53, the limiting plate 52 is in the position shown in the attached diagram. Figure 5When the limiting slide rail 51 is slid upwards as shown, applying downward pressure causes the limiting plate 52 to compress the limiting spring 53 and move it into the limiting slide rail 51. The limiting spring 53 is a continuously bent irregularly shaped spring, which can be purchased from online purchasing websites, such as the irregularly shaped spring sold by Shenzhen Xinmei Precision Hardware Technology Co., Ltd. on 1688.com. Custom sizes are available upon request. The top of the limiting plate 52 has a sealing nozzle groove, and a sealing nozzle protective cover 54 is installed on the left side of the sealing nozzle groove. When the heat collection tube is conveyed into position, the limiting plate 52 slides upwards to block and limit the tail end of the heat collection tube, allowing the sealing nozzle at the tail end of the heat collection tube to be positioned in the sealing nozzle groove. Then, the sealing nozzle protective cover 54 can protect the sealing nozzle. To protect the collector tube from damage during cleaning and prevent it from losing its vacuum effect, a fastening bolt 55 is installed through one of the limiting slide rails 51. The limiting plate 52 has bolt holes 56. When the collector tube needs to be placed on the upper tube conveying mechanism 4 for conveying or when the collector tube needs to be removed, the limiting plate 52 can be slid into the limiting slide rail 51. At this time, the bolt holes 56 correspond to the positions of the fastening bolts 55. The fastening bolts 55 are screwed into the bolt holes 56 to fix the limiting plate 52. When the next collector tube is conveyed to the position, the fastening bolts can be loosened, and the limiting plate 52 slides upward out of the limiting slide rail 51 under the elastic force of the limiting spring plate 53, thus limiting the tail end of the collector tube.

[0046] As attached Figures 1-4 , Figures 6-10 As shown, the inner wall cleaning mechanism 6 includes an inner wall reciprocating screw 61 fixedly installed on the left side of the housing 3. The inner wall reciprocating screw 61 is fixed and cannot rotate. An inner wall cleaning disc 62 with a threaded engagement is installed on the outer side of the inner wall reciprocating screw 61. The inner wall cleaning disc 62 can rotate outside the inner wall reciprocating screw 61. When it rotates, it can also achieve reciprocating motion in the left and right directions by threaded transmission with the inner wall reciprocating screw 61. Figure 6 , Figure 7 As shown, the initial position of the inner wall cleaning disc 62 is at the right end of the inner wall reciprocating screw 61. After the heat collection tube is conveyed and limited, the inner wall cleaning disc 62 is on the right side of the tube opening.

[0047] As attached Figure 10As shown, the inner wall cleaning disc 62 has several circumferentially evenly distributed inclined expansion grooves 63 on its outer circumferential surface. The inclined expansion grooves 63 intersect with the axis of the inner wall cleaning disc 62. Each inclined expansion groove 63 has an inner wall cleaning scraper 64 that is radially slidably installed inside it. The inner wall cleaning scraper 64 can be made of non-metallic material, such as plastic, to avoid scratching the inner wall of the heat collection tube. Each inner wall cleaning scraper 64 is installed with a V-shaped spring piece 65 between it and the bottom of the inclined expansion groove 63, so that the inner wall cleaning scraper 64 can elastically expand and contract inside the inclined expansion groove 63. When no external force is applied to the inner wall cleaning scraper 64, the V-shaped spring piece 65 is in a free-release state, and most of the inner wall cleaning scraper 64 extends out of the outside of the inclined expansion groove 63.

[0048] The inner wall cleaning scraper 64 is provided with a scraper extension slope 66 at one end outside the inclined extension groove 63. After the heat collection tube is limited and fixed, the inner wall cleaning disc 62 rotates and moves to the left along the reciprocating screw 61 on the inner wall. The inner wall cleaning disc 62 drives multiple inner wall cleaning scrapers 64 to rotate circumferentially. When multiple scraper extension slopes 66 abut against the edge of the heat collection tube opening, the heat collection tube opening can apply a squeezing force to multiple scraper extension slopes 66, thereby squeezing and sliding multiple inner wall cleaning scrapers 64 into the inclined extension groove 63. When the outermost end of multiple inner wall cleaning scrapers 64 is inside the inner wall of the heat collection tube, the outermost end of multiple inner wall cleaning scrapers 64 can abut against the inner wall of the heat collection tube. Then the inner wall cleaning disc 62 can continue to drive multiple inner wall cleaning scrapers 64 to rotate circumferentially, thereby cleaning the scale attached to the inner wall of the heat collection tube.

[0049] The inner wall cleaning scraper 64 is equipped with an inner wall rubber block 67 on one end face outside the inclined telescopic groove 63. When the inner wall cleaning scraper 64 enters the heat collection tube, its outermost end abuts against the inner wall of the heat collection tube through the inner wall rubber block 67, which can avoid scratching the heat collection tube during rotation and movement.

[0050] As attached Figure 9 , Figure 10 As shown, from the left-hand perspective, the inner wall cleaning disc 62 rotates counterclockwise. Therefore, when the inner wall cleaning disc 62 rotates and moves to the left outside the inner wall reciprocating screw 61, the edges of the left ends of the multiple inner wall cleaning scrapers 64 can scrape off the scale on the inner wall of the heat collector tube. When the inner wall cleaning disc 62 moves to the leftmost end of the reciprocating thread outside the inner wall reciprocating screw 61, the inner wall cleaning disc 62 begins to move to the right. At this time, the inner wall cleaning disc 62 still drives the multiple inner wall cleaning scrapers 64 to rotate counterclockwise and move to the right. At this time, the multiple tilted inner wall cleaning scrapers 64 can generate a pushing force to the right on the scale accumulated inside the heat collector tube, thereby pushing the scale out of the tube opening and allowing the scale to fall into the support box 2 for storage.

[0051] As attached Figures 6-9 As shown, an inner wall cleaning drive wheel 611 is coaxially rotatably mounted on the outer side of the right end of the inner wall reciprocating screw 61. The inner wall cleaning drive wheel 611 can rotate on its own outside the right end of the inner wall reciprocating screw 61. An inner wall cleaning driven wheel 612 is coaxially rotatably mounted on the outer side of the left end of the inner wall reciprocating screw 61. The inner wall cleaning driven wheel 612 can rotate on its own outside the left end of the inner wall reciprocating screw 61. Two cleaning disc drive rods 613 that penetrate the inner wall cleaning disc 62 are fixedly installed between the opposite sides of the inner wall cleaning drive wheel 611 and the inner wall cleaning driven wheel 612.

[0052] As attached Figure 9 As shown, the two cleaning disc drive rods 613 are symmetrical about the center of the inner wall reciprocating screw 61. When the inner wall cleaning drive wheel 611 rotates, it drives the two cleaning disc drive rods 613 to rotate circumferentially around the outer side of the inner wall reciprocating screw 61. The two cleaning disc drive rods 613 can then drive the inner wall cleaning disc 62 to rotate circumferentially, thereby driving multiple inner wall cleaning scrapers to move circumferentially to scrape away scale. When the inner wall cleaning disc 62 rotates circumferentially, it can generate a threaded transmission with the inner wall reciprocating screw 61, allowing the inner wall cleaning disc 62 to move circumferentially within the inner wall. The reciprocating screw 61 moves back and forth, meaning the inner wall cleaning disc 62 first moves from the right end of the inner wall reciprocating screw 61 to its left end, and then moves to its right end after reaching the leftmost end of the inner wall reciprocating screw 61. This achieves the reciprocating cleaning work of the inner wall cleaning disc 62. When the inner wall cleaning disc 62 moves to the rightmost end of the inner wall reciprocating screw 61 and moves out of the heat collector tube opening, multiple inner wall cleaning scrapers 64 extend outward to their initial positions under the elastic force of the V-shaped spring 65, so as to enter the next heat collector tube for cleaning work.

[0053] As attached Figure 1 , Figure 2 , Figure 8 As shown, a sleeve 9 is coaxially fixedly installed on the left end face of the reciprocating screw 61 on the inner wall. A push rod 10 is axially slidably installed inside the sleeve 9. The left end of the push rod 10 is located outside the left end of the sleeve 9 and a rubber top block 11 is fixedly installed thereon. A push rod spring 12 is installed between the right end face of the push rod 10 and the left end face of the reciprocating screw 61 on the inner wall.

[0054] When the end of the heat collector tube is placed on the leftmost V-shaped conveyor roller 41 and conveyed to the right, the inner reciprocating screw 61 enters the inner wall of the heat collector tube. As the heat collector tube moves to the right, the left end of the inner reciprocating screw 61 gradually approaches the inner wall of the end of the heat collector tube until the two come into contact. In order to prevent the inner reciprocating screw 61 from puncturing the inner wall of the end of the heat collector tube, a rubber top block 11 for buffering is provided at the left end of the inner reciprocating screw 61. When the inner wall of the end of the heat collector tube comes into contact with the rubber top block 11, it can push the rubber top block 11 to move to the right, thereby causing the push rod 10 to slide into the sleeve 9 and compress the push rod spring 12, thus avoiding a hard collision between the inner reciprocating screw 61 and the inner wall of the heat collector tube, thereby achieving a buffering effect on the heat collector tube.

[0055] To further buffer and protect the inner wall of the collector tube tail end from damage, a button 13 is fixedly installed in the middle of the left end face of the reciprocating screw 61. A wire groove runs through the left and right end faces of the reciprocating screw 61 (the reciprocating screw 61 can be a hollow tube with open ends and reciprocating threads on its outer side). The button 13 is connected to a wire 14. The other end of the wire 14 passes through the wire groove and is placed inside the housing 3, and is electrically connected to the controller inside the housing 3. The button 13 is also electrically connected to the transmission motor 44 through the controller. When the collector tube tail end... When the inner wall of the end abuts against the rubber top block 11 and drives the top rod 10 to slide into the sleeve 9 for buffering, the right end face of the top rod 10 will touch the button 13 and press it. After the controller receives the pressing signal of the button 13, the transmission motor 44 stops working, and the multiple V-shaped transmission rollers 41 stop transmitting the heat collection tube. The heat collection tube will no longer move to the right, avoiding the situation where the inner wall of the tail end of the heat collection tube is damaged by continuous pushing force. Then, the limiting plate 52 slides upward to limit the tail end of the heat collection tube, thereby realizing the limiting and fixing of the heat collection tube, and then the cleaning work can be carried out.

[0056] As attached Figures 1-4 , Figure 6 , Figure 7 , Figure 9 As shown, the outer wall cleaning mechanism 7 includes an outer wall cleaning slide rod 71 fixedly installed on the left side of the housing 3 and located above the inner wall reciprocating screw 61. The right end of the outer wall cleaning slide rod 71 is fixed on the housing 3, and its length is greater than the length of the inner wall reciprocating screw 61. An outer wall cleaning plate 72 is axially slidably installed on the outer side of the outer wall cleaning slide rod 71. The outer wall cleaning plate 72 can slide left and right on the outer side of the outer wall cleaning slide rod 71.

[0057] The bottom of the outer wall cleaning plate 72 is fixedly installed with an outer wall telescopic box 73 with a bottom opening. An outer wall telescopic block 74 is slidably installed inside the outer wall telescopic box 73. A telescopic spring 75 is installed on the top surface of the outer wall telescopic block 74. When the telescopic spring 75 is naturally released, the bottom of the outer wall telescopic block 74 extends out of the outer wall telescopic box 73. When an upward pressing force is applied to the outer wall telescopic block 74, the outer wall telescopic block 74 slides into the outer wall telescopic box 73 and compresses the telescopic spring 75.

[0058] The bottom of the outer wall telescopic block 74 is fixedly installed with an outer wall cleaning half ring 76. The left side of the outer wall cleaning half ring 76 is provided with an outer wall guide slope 77. The inner side of the outer wall cleaning half ring 76 is installed with an outer wall cleaning rubber layer 78. The outer wall cleaning half ring 76 is made of non-metallic material and can be made of the same material as the inner wall cleaning disc 62, such as plastic material, to avoid scratching the heat collection tube.

[0059] As attached Figure 6 and Figure 7 As shown, when the heat collector tube is fixed in place, the outer wall cleaning half-ring 76 is located on the right side of the heat collector tube opening. When the outer wall cleaning plate 72 moves to the left, the edge of the heat collector tube opening first abuts against the outer wall guide slope 77 and can apply an upward squeezing force to the outer wall guide slope 77, thereby driving the outer wall cleaning half-ring 76 to move upward and driving the outer wall telescopic block 74 to move upward into the outer wall telescopic box 73. When the inner side of the outer wall cleaning half-ring 76 is in contact with the outer wall of the heat collector tube, the outer wall cleaning half-ring 76 can move to the left to clean the dirt on the outer wall of the heat collector tube. In order to avoid the outer wall cleaning half-ring 76 from damaging the heat collector tube, an outer wall cleaning rubber layer 78 is installed on its inner side to protect the outer wall of the heat collector tube and increase the friction to better clean the dirt and improve the cleaning efficiency.

[0060] As attached Figure 6 and Figure 7 As shown, since particulate dust and other dirt may be attached to the outer wall of the heat collector tube, and the friction between the outer wall cleaning rubber layer 78 and the outer wall of the heat collector tube is dry friction when the outer wall cleaning rubber layer 78 moves, in order to avoid scratches on the outer wall of the heat collector tube caused by the dry friction, a nozzle is installed on the left side of the outer wall telescopic box 73. During the process of the outer wall cleaning rubber layer 78 moving and cleaning the outer wall of the heat collector tube, the nozzle can spray water onto the outer wall of the heat collector tube, which can wash away some dirt in advance and soften the remaining dirt. A water tank can be installed inside the casing 3, connected to the nozzle through a water pipe, and then pumped into the water pipe by a water pump installed in the water tank and sprayed out from the nozzle.

[0061] As attached Figures 1-4 , Figure 6 , Figure 7 , Figure 9As shown, an outer wall reciprocating screw 79 located below the outer wall cleaning slide rod 71 is rotatably mounted on the left side of the chassis 3. The outer wall reciprocating screw 79 passes through the outer wall cleaning plate 72 and is threadedly engaged with it. When the outer wall reciprocating screw 79 rotates, it can drive the outer wall cleaning plate 72 to move back and forth. A support plate 15 is installed on the left side of the chassis 3. The left end of the support plate 15 is bent downward at 90°. The left ends of the outer wall cleaning slide rod 71 and the outer wall reciprocating screw 79 are both installed on the support plate 15. The support plate 15 can support the outer wall cleaning slide rod 71 and the outer wall reciprocating screw 79.

[0062] As attached Figure 2 , Figure 6 , Figure 7 As shown, since the heat collection tube has a double-layer vacuum structure, there is a large vacuum distance between the inner wall and the outer wall at its tail end. Therefore, when the inner wall cleaning disc 62 and the outer wall cleaning plate 72 are respectively at the rightmost end of the reciprocating thread outside the inner wall reciprocating screw 61 and the outer wall reciprocating screw 79, the position of the outer wall cleaning half ring 76 is to the left of the inner wall cleaning disc 62. In use, the inner wall cleaning disc 62 and the outer wall reciprocating screw 79 rotate simultaneously, and the outer wall cleaning half ring 76 and the inner wall cleaning disc 62 move to the left simultaneously. The outer wall cleaning half ring 76 first moves to a state of contact with the outer wall of the heat collection tube, and then the inner wall cleaning disc 62 moves to the inside of the heat collection tube opening, so that multiple inner wall cleaning scrapers retract and abut against the inner wall. Then the two continue to move synchronously to the left end of the heat collection tube for cleaning.

[0063] When the outer wall cleaning half-ring 76 moves to the leftmost end of the outer wall of the collector tube, the inner wall cleaning disc 62 also moves to the leftmost end of the inner wall of the collector tube. Then, both move to the right end of the collector tube to reset. However, if the two are on the same vertical plane, when the inner wall cleaning disc 62 moves to the leftmost end of the inner wall of the collector tube, the outer wall cleaning half-ring 76 will be a certain distance away from the leftmost end of the outer wall of the collector tube, and this distance will not be cleaned. Therefore, the above-mentioned position setting is made between the two to solve the problem that the outer wall cleaning half-ring 76 cannot be cleaned at this distance from the leftmost end of the outer wall of the collector tube.

[0064] As attached Figures 6-7 As shown, the cleaning drive mechanism 8 includes a cleaning drive motor 81 installed inside the chassis 3. The cleaning drive motor 81 is electrically connected to the power supply and the controller. The output shaft of the cleaning drive motor 81 extends to the outer side of the left side of the chassis 3 and is coaxially fixedly mounted with a cleaning drive gear 82. An inner wall cleaning gear ring 83 is coaxially fixedly mounted on the outer circumference of the inner wall cleaning drive wheel 611. An outer wall cleaning gear 84 is coaxially fixedly mounted on the outer side of the right end of the outer wall reciprocating screw 79. Both the inner wall cleaning gear ring 83 and the outer wall cleaning gear 84 mesh with the cleaning drive gear 82.

[0065] When the cleaning drive motor 81 is started, its output shaft rotates and drives the cleaning drive gear 82 to rotate. The cleaning drive gear 82 simultaneously drives the inner wall cleaning gear ring 83 and the outer wall cleaning gear 84, which mesh with it, to rotate synchronously. This causes the inner wall cleaning gear ring 83 to drive the inner wall cleaning drive wheel 611 to rotate, thereby causing the inner wall cleaning disc 62 to rotate and reciprocate outside the inner wall reciprocating screw 61, achieving the purpose of cleaning the inner wall of the heat collection tube. The outer wall cleaning gear 84 drives the outer wall reciprocating screw 79 to rotate, thereby driving the outer wall cleaning plate 72 to reciprocate, achieving the purpose of cleaning the outer wall of the heat collection tube.

[0066] As attached Figure 1-4 As shown, it also includes a dirt collection mechanism, which includes a slot through the front side of the support box 2. A dirt collection box 16 is installed in the slot and placed inside the support box 2. When the inner wall cleaning plate 62 moves to the right side of the inner wall of the heat collection tube, it can discharge the scale on the inner wall of the heat collection tube. The scale falls into the dirt collection box 16 inside the support box 2 for storage.

[0067] As attached Figure 4 As shown, the bottom surface of the sludge collection box 16 is provided with a slope that is lower on the left and higher on the right. Several filter screen holes 17 are opened on the left side of the sludge collection box 16. A drain pipe 18 located on the left side of the sludge collection box 16 is installed on the front side of the support box 2. When scale falls into the sludge collection box 16, it can slide to the left along the slope to avoid accumulating at the right end of the sludge collection box 16. If there is water in the scale, the filter screen holes 17 can filter the water, so that the water flows into the support box 2 and is discharged from the drain pipe 18. The sludge collection box 16 can be removed from the slot on the front side of the support box 2, and the scale inside can be disposed of separately or discarded.

[0068] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0069] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention according to the specific circumstances.

[0070] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A device for cleaning fouling on solar collector tubes, comprising a base plate (1), characterized in that, The top of the base plate (1) is equipped with a support box (2) with a top opening and a chassis (3) located on the right side of the support box (2). The support box (2) is equipped with an upper pipe conveying mechanism (4) inside the opening. The support box (2) is equipped with a limiting mechanism (5) on the left side. The chassis (3) is equipped with an inner wall cleaning mechanism (6) that can clean the inner wall of the heat collection tube. The chassis (3) is equipped with an outer wall cleaning mechanism (7) that can clean the outer wall of the heat collection tube. The chassis (3) is equipped with a cleaning drive mechanism (8) for driving the inner wall cleaning mechanism (6) and the outer wall cleaning mechanism (7).

2. The heat collector tube fouling cleaning device according to claim 1, characterized in that, The upper tube conveying mechanism (4) includes a plurality of equidistantly arranged V-shaped conveying rollers (41) rotatably mounted between the front and rear inner walls of the support box (2). Each V-shaped conveying roller (41) is coaxially fixedly mounted with a conveying sprocket group (42). A conveying chain (43) is installed between each two adjacent conveying sprocket groups (42). One of the V-shaped conveying rollers (41) is connected to a conveying motor (44).

3. The heat collector tube fouling cleaning device according to claim 1, characterized in that, The limiting mechanism (5) includes two symmetrically positioned limiting slide rails (51) installed on the left side of the support box (2). A limiting plate (52) is slidably installed between the two limiting slide rails (51). A limiting spring plate (53) is installed between the bottom of the limiting plate (52) and the base plate (1). A sealing nozzle groove is provided on the top of the limiting plate (52). A sealing nozzle protective cover (54) is installed on the left side of the sealing nozzle groove. A fastening bolt (55) is installed through one of the limiting slide rails (51). A bolt hole (56) is provided on the limiting plate (52).

4. The heat collector tube fouling cleaning device according to claim 2, characterized in that, The inner wall cleaning mechanism (6) includes an inner wall reciprocating screw (61) fixedly installed on the left side of the chassis (3). An inner wall cleaning disc (62) with a threaded engagement is installed on the outer side of the inner wall reciprocating screw (61). Several circumferentially evenly distributed inclined telescopic grooves (63) are opened on the outer circumferential surface of the inner wall cleaning disc (62). An inner wall cleaning scraper (64) is radially slidably installed in each inclined telescopic groove (63). A V-shaped spring piece (65) is installed between each inner wall cleaning scraper (64) and the bottom of the inclined telescopic groove (63). A scraper telescopic inclined surface (66) is provided at one end of the inner wall cleaning scraper (64) outside the inclined telescopic groove (63). An inner wall rubber block (67) is installed on the end face of the inner wall cleaning scraper (64) outside the inclined telescopic groove (63).

5. The heat collector tube fouling cleaning device according to claim 4, characterized in that, An inner wall cleaning drive wheel (611) is coaxially rotatably mounted on the outer side of the right end of the inner wall reciprocating screw (61), and an inner wall cleaning passive wheel (612) is coaxially rotatably mounted on the outer side of the left end of the inner wall reciprocating screw (61). Two cleaning disc drive rods (613) that penetrate the inner wall cleaning disc (62) are fixedly installed between the opposite sides of the inner wall cleaning drive wheel (611) and the inner wall cleaning passive wheel (612).

6. The heat collector tube fouling cleaning device according to claim 4, characterized in that, A sleeve (9) is coaxially fixedly installed on the left end face of the inner wall reciprocating screw (61). A push rod (10) is axially slidably installed inside the sleeve (9). The left end of the push rod (10) is located outside the left end of the sleeve (9) and a rubber top block (11) is fixedly installed. A push rod spring (12) is installed between the right end face of the push rod (10) and the left end face of the inner wall reciprocating screw (61). A button (13) is fixedly installed in the middle of the left end face of the inner wall reciprocating screw (61). A wire groove passes through the left and right end faces of the inner wall reciprocating screw (61). A wire (14) is connected to the button (13). The wire (14) passes through the wire groove and is placed inside the housing (3) and is electrically connected to the controller inside the housing (3).

7. The heat collector tube fouling cleaning device according to claim 5, characterized in that, The outer wall cleaning mechanism (7) includes an outer wall cleaning slide rod (71) fixedly installed on the left side of the chassis (3) and located above the inner wall reciprocating screw (61). An outer wall cleaning plate (72) is axially slidably installed on the outer side of the outer wall cleaning slide rod (71). An outer wall telescopic box (73) with a bottom opening is fixedly installed at the bottom of the outer wall cleaning plate (72). An outer wall telescopic block (74) is slidably installed up and down inside the outer wall telescopic box (73). A telescopic spring (75) is installed on the top surface of the outer wall telescopic block (74). An outer wall cleaning half ring (76) is fixedly installed at the bottom of the outer wall telescopic block (74). An outer wall guide slope (77) is provided on the left side of the outer wall cleaning half ring (76). An outer wall cleaning rubber layer (78) is installed on the inner side of the outer wall cleaning half ring (76).

8. The heat collector tube fouling cleaning device according to claim 7, characterized in that, An outer wall reciprocating screw (79) located below the outer wall cleaning slide rod (71) is rotatably mounted on the left side of the chassis (3). The outer wall reciprocating screw (79) passes through the outer wall cleaning plate (72) and is threadedly engaged with it. A support plate (15) is installed on the left side of the chassis (3). The left end of the support plate (15) is bent downward at 90°. The left ends of the outer wall cleaning slide rod (71) and the outer wall reciprocating screw (79) are both mounted on the support plate (15).

9. A device for cleaning scale from a solar collector tube according to claim 8, characterized in that, The cleaning drive mechanism (8) includes a cleaning drive motor (81) installed inside the chassis (3). The output shaft of the cleaning drive motor (81) extends to the outer side of the left side of the chassis (3) and is coaxially fixedly mounted with a cleaning drive gear (82). An inner wall cleaning gear ring (83) is coaxially fixedly mounted on the outer circumference of the inner wall cleaning drive wheel (611). An outer wall cleaning gear (84) is coaxially fixedly mounted on the outer side of the right end of the outer wall reciprocating screw (79). The inner wall cleaning gear ring (83) and the outer wall cleaning gear (84) are both meshed with the cleaning drive gear (82).

10. A device for cleaning scale on a solar collector tube according to claim 1, characterized in that, It also includes a sludge collection mechanism, which includes a slot through the front side of the support box (2), a sludge collection box (16) installed in the slot and placed inside the support box (2), the bottom surface of the sludge collection box (16) is provided with a slope that is lower on the left and higher on the right, a number of filter screen holes (17) are opened on the left side of the sludge collection box (16), and a drain pipe (18) located on the left side of the sludge collection box (16) is installed on the front side of the support box (2).

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