Multi-directional brushing mechanism for pipe cleaning

Abstract

The application relates to the technical field of pipeline cleaning, in particular to a multi-directional brushing mechanism for pipeline cleaning, which comprises a cleaning rod, a supporting cylinder is sleeved on the surface of the cleaning rod, a cleaning head is threadedly connected to one end of the cleaning rod, the cleaning head is in the shape of a truncated cone, a mounting groove is formed in the side wall of the cleaning head, a brush plate is rotatably mounted in the mounting groove, and magnets are embedded in the side of the brush plate close to the mounting groove. The cleaning head can be inserted into the pipeline, a plurality of wear-resistant brush plates are arranged at equal intervals in the circumferential direction of the cleaning head, during operation, the rotating drum drives the cleaning head to drive the brush plates to synchronously rotate in the circumferential direction, and the axial feeding action is realized to achieve dead-angle-free covering cleaning of the pipe wall, stable radial scraping force is applied to the areas such as the pipe joint gap, not only can the dead-angle-embedded dirt layer which cannot be reached by traditional one-way cleaning be completely removed, but also the scale stripping efficiency and the cleaning uniformity of the inner wall of the pipeline are improved.

Description

Technical Field

[0001] This invention relates to the field of pipeline cleaning technology, specifically to a multi-directional brushing mechanism for pipeline cleaning. Background Technology

[0002] Pipelines are fluid transport devices assembled from pipes, pipe fittings, valves, and other components. They enable the closed-loop transport of gases, liquids, and fluids containing solid particles. In addition, pipelines are also the core mass and heat transfer components of heat exchange equipment. During long-term operation, minerals, corrosion products, and microbial metabolites in the fluid will gradually deposit on the inner wall of the pipeline, forming a dense scale layer with extremely poor thermal conductivity. This significantly reduces the heat exchange efficiency of the heat exchanger and increases the fluid transport resistance. Therefore, it is necessary to regularly clean the inner wall of the heat exchanger pipelines to ensure the efficient and stable operation of the equipment. Common cleaning methods for heat exchangers include mechanical cleaning, chemical cleaning, and purging cleaning. Chemical cleaning is a cleaning method that uses chemical agents to react with the scale layer, dissolving, dispersing or peeling off the dirt. However, chemical cleaning takes a long time, and the concentration and temperature of the agent are difficult to control precisely, which can easily cause the chemical agents to corrode the pipes. Purge cleaning is a cleaning method that uses the shearing force of high-speed water flow to remove loose dirt from pipes. However, rinsing with high-speed water flow alone is not enough to remove stubborn dirt, resulting in some areas not being thoroughly cleaned. Mechanical cleaning is a cleaning method that uses physical force to directly break the bond between the scale layer and the pipe wall, thereby removing the dirt. Given the complex scale layer characteristics of heat exchanger pipes, mechanical cleaning is more suitable for cleaning heat exchanger pipes. However, traditional mechanical cleaning devices use a pusher assembly to push the brushing mechanism into the inside of the heat exchanger pipes for brushing. During the brushing process, the brushing mechanism only moves in a straight line along the length of the pipe, achieving scraping and cleaning in a single axial direction. This makes it difficult to cover the inner wall area at all circumferential angles, and it is especially unable to effectively remove embedded dirt in irregular locations such as pits, welds, and joint gaps. As a result, it is difficult to effectively clean the dirt inside the pipes. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a multi-directional brushing mechanism for pipe cleaning. This solves the problem that during the brushing process, the brushing mechanism only performs a linear feed motion along the length of the pipe, achieving scraping and cleaning in a single axial direction. This makes it difficult to cover the inner wall area at all circumferential angles, and in particular, it cannot effectively remove embedded dirt in irregular locations such as pits, welds, and interface gaps, thus hindering effective brushing and affecting the cleaning effect on the dirt inside the pipe.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a multi-directional brushing mechanism for pipe cleaning, comprising a cleaning rod, a support cylinder sleeved on the surface of the cleaning rod, a cleaning head threadedly connected to one end of the cleaning rod, the cleaning head being truncated cone-shaped, an installation groove being provided on the side wall of the cleaning head, a brush plate being rotatably installed in the installation groove, a magnet being embedded on the side of the brush plate near the installation groove, and a pushing component being installed inside the cleaning head, the pushing component being used to push the brush plate to flip away from the installation groove; A spiral cylinder is fixedly installed on the upper end of the support cylinder, and a rotating cylinder is sleeved on the surface of the cleaning rod. A spiral groove is opened on the outer wall of the rotating cylinder, and a positioning groove is opened on the inner wall of the spiral cylinder. A positioning rod is slidably and sealingly connected in the positioning groove of the spiral cylinder, and the end of the positioning rod away from the positioning groove is slidably connected in the spiral groove. The lower end of the support cylinder is provided with an annular groove, and a sealing ring is slidably and sealingly connected in the annular groove of the support cylinder. An oil passage is provided inside the support cylinder, one end of which is connected to the annular groove and the other end is connected to the positioning groove. A locking assembly is installed at the upper end of the rotating drum, which is used to lock the cleaning rod inside the rotating drum.

[0005] By adopting the above technical solution, a cleaning head that can extend into the pipe is set up, and multiple wear-resistant brush plates are arranged at equal intervals around the cleaning head. During operation, the rotating drum drives the cleaning head to make synchronous circumferential rotation of the brush plates. Combined with the axial feeding action, it can achieve a thorough cleaning of the pipe wall without dead angles. It applies a stable radial scraping force to areas such as pipe joint gaps. It can not only thoroughly remove the scale layer embedded in the dead angles that traditional unidirectional cleaning cannot reach, but also improve the scale removal efficiency and the uniformity of cleaning the inner wall of the pipe.

[0006] Preferably, the locking assembly includes a locking ring, an arc-shaped plate is fixedly connected to the upper end of the rotating cylinder, the arc-shaped plate has a trapezoidal cross-sectional shape, the locking ring is sleeved on the outer wall of the arc-shaped plate, and the locking ring is threadedly connected to the arc-shaped plate.

[0007] Preferably, a suction cup is installed at the end of the sealing ring away from the annular groove, and the suction cup is threadedly connected to the sealing ring.

[0008] Preferably, the pushing assembly includes a pushing rod, the cleaning head has a groove communicating with the mounting slot inside, the pushing rod is slidably and sealingly connected in the groove, the cleaning head has a cylindrical groove inside, a rotating plate is threadedly connected in the cylindrical groove of the cleaning head, and a connecting unit is installed inside the cleaning rod, the connecting unit being used to connect the rotating plate.

[0009] Preferably, the connecting unit includes a connecting block, the cleaning rod has a cylindrical cavity inside, a rotating rod is rotatably connected inside the cylindrical cavity, the two ends of the rotating rod have rectangular grooves, the connecting block is slidably connected in the rectangular groove located below the rotating rod, the connecting block and the bottom of the rectangular groove are fixedly connected by a connecting spring, and the upper end of the rotating plate has a connecting groove that cooperates with the connecting block.

[0010] Preferably, the upper end of the cleaning rod has a threaded groove.

[0011] Preferably, a bellows is provided between the spiral cylinder and the support cylinder, with one end of the bellows fixedly connected to the support cylinder and the other end fixedly connected to the spiral cylinder.

[0012] Preferably, a corrugated airbag is provided between the rotating drum and the spiral drum, a feed pipe is connected to one side of the corrugated airbag, a water outlet is provided on the inner wall of the support cylinder, and a spring hose is provided between the rotating drum and the support cylinder, with one end of the spring hose connected to the corrugated airbag and the other end connected to the water outlet.

[0013] Preferably, a one-way valve is installed in both the feed pipe and the outlet, and the spring hose is located inside the bellows.

[0014] Preferably, the brush plate has a strip groove at the end away from the mounting groove, and the side wall of the brush plate has an insertion hole communicating with the strip groove. A grinding plate is installed in the strip groove, and the side wall of the grinding plate has a connecting hole facing the insertion hole. A rod is slidably and sealingly connected in the insertion hole.

[0015] Working principle: First, connect the large-sized cleaning head with an outer diameter larger than the inner diameter of the heat exchange tube to the end of the cleaning rod. Align the small end of the cleaning head with the tube opening. Use the conical guide to make the brush plate in the conical area contact the hardened scale layer at the tube opening. Drive the rotating drum to rotate the cleaning rod, so that the cleaning rod drives the cleaning head to quickly break and peel off the scale layer at the tube opening. After the pre-cleaning of the tube opening is completed, replace it with a cleaning head whose outer diameter is compatible with the inner diameter of the heat exchange tube. Send it into the tube opening and push the suction cup at one end of the support cylinder to adsorb the tube sheet. Continue to push the support cylinder to contact the tube sheet. At this time, the sealing ring enters the annular groove, the positioning rod extends out of the positioning groove and inserts into the spiral groove. At this time, the rotating drum and the spiral drum are connected by a spiral drive. The user inserts a four-corner wrench into the rectangular groove at the top of the rotating rod, thereby rotating the rotating rod. The rotating rod drives the rotating plate to rotate through the connecting block, causing the rotating plate to spiral into the cylindrical groove. The hydraulic oil in the cylindrical groove is pushed into the groove by the rotating plate and pushes the push rod out of the groove. The push rod pushes the brush plate to flip outward and contact the scale layer on the inner wall of the pipe. Then rotate the drum, and the positioning rod pushes the drum and cleaning rod together to feed axially into the tube through the spiral groove. This causes the cleaning rod to push the cleaning head to rotate and penetrate deeper into the heat exchange tube, so that the cleaning head can efficiently grind and remove the scale on the inner wall of the tube through the brush plate on the surface. When it is necessary to replace the polishing plate, use a screwdriver to push the insert rod out of the socket to separate the insert rod from the polishing plate. Remove the old polishing plate and insert the new polishing plate, aligning the connecting hole of the polishing plate with the socket of the brush plate. Then insert the insert rod from the socket on one side of the brush plate, so that the insert rod passes through the socket and the connecting hole to fix the polishing plate in the groove.

[0016] This invention provides a multi-directional brushing mechanism for pipe cleaning. It has the following beneficial effects: 1. This invention features a cleaning head that can extend into the pipe and multiple wear-resistant brush plates are evenly spaced around the cleaning head. During operation, the rotating drum drives the cleaning head to rotate the brush plates in a synchronous circumferential motion. Combined with the axial feeding action, it achieves a thorough cleaning of the pipe wall without dead angles and applies a stable radial scraping force to areas such as pipe joint gaps. This not only thoroughly removes the scale layer embedded in dead angles that traditional unidirectional cleaning cannot reach, but also improves the scale removal efficiency and the uniformity of cleaning the inner wall of the pipe.

[0017] 2. The present invention, through the setting of the bellows, enables the bellows and the bellows airbag to shield the spiral grooves on the surface of the rotating drum, preventing external impurities from entering the spiral grooves and blocking the normal transmission of the rotating drum and the spiral drum. Moreover, the spring hose is installed inside the bellows, so that the bellows can protect the spring hose and prevent the spring hose from being scratched by collisions with external hard objects during transportation, thereby improving the service life of the spring hose.

[0018] 3. This invention features a grinding plate installed in the groove of the brush plate. By inserting a rod into the insertion hole, the rod can pass through the insertion hole and enter the connection hole of the grinding plate, thus achieving a quick-release connection between the grinding plate and the brush plate. When the grinding plate is worn or the grinding efficiency decreases, only the rod needs to be pulled out to replace the grinding plate separately, without replacing the entire brush plate. This reduces production costs, lowers the overall disassembly and assembly difficulty, and improves maintenance efficiency. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the support cylinder of the present invention; Figure 3 This is a partial structural diagram of the support cylinder of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle; Figure 5This is a three-dimensional structural diagram of the cleaning head of the present invention; Figure 6 This is a partial structural diagram of the cleaning head of the present invention; Figure 7 for Figure 6 Enlarged structural diagram at point B; Figure 8 for Figure 6 Enlarged structural diagram at point C; Figure 9 for Figure 6 Enlarged structural diagram at point D; Among them, 1. Cleaning rod; 101. Connecting block; 102. Cylindrical cavity; 103. Rotating rod; 104. Rectangular groove; 105. Connecting spring; 106. Threaded groove; 2. Support cylinder; 201. Spiral cylinder; 202. Positioning groove; 203. Positioning rod; 204. Annular groove; 205. Sealing ring; 206. Oil passage; 207. Suction cup; 208. Bellows; 209. Water outlet; 210. Spring hose; 3. Cleaning 301. Head; 302. Mounting slot; 303. Brush plate; 304. Magnet; 305. Push rod; 306. Groove; 307. Columnar groove; 308. Rotating plate; 309. Strip groove; 310. Insertion hole; 311. Grinding plate; 312. Connecting hole; 313. Insert rod; 4. Rotary cylinder; 401. Spiral groove; 402. Locking ring; 403. Arc plate; 404. Corrugated airbag; 405. Feed pipe. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see the appendix Figure 1 - Appendix Figure 9 This invention provides a multi-directional brushing mechanism for pipe cleaning, including a cleaning rod 1, a support cylinder 2 sleeved on the surface of the cleaning rod 1, a cleaning head 3 threadedly connected to one end of the cleaning rod 1, the cleaning head 3 being truncated cone-shaped, an installation groove 301 being provided on the side wall of the cleaning head 3, a brush plate 302 being rotatably installed in the installation groove 301, a magnet 303 being embedded on the side of the brush plate 302 near the installation groove 301, and a pushing component being installed inside the cleaning head 3, the pushing component being used to push the brush plate 302 to rotate away from the installation groove 301; A spiral cylinder 201 is fixedly installed on the upper end of the support cylinder 2. A rotating cylinder 4 is sleeved on the surface of the cleaning rod 1. A spiral groove 401 is opened on the outer wall of the rotating cylinder 4. A positioning groove 202 is opened on the inner wall of the spiral cylinder 201. A positioning rod 203 is slidably and sealingly connected in the positioning groove 202 of the spiral cylinder 201. The end of the positioning rod 203 away from the positioning groove 202 is slidably connected in the spiral groove 401. The lower end of the support cylinder 2 is provided with an annular groove 204, and a sealing ring 205 is slidably and sealingly connected in the annular groove 204 of the support cylinder 2. An oil passage 206 is provided inside the support cylinder 2, and one end of the oil passage 206 is connected to the annular groove 204, and the other end is connected to the positioning groove 202. A locking assembly is installed at the upper end of the rotating drum 4. The locking assembly is used to lock the cleaning rod 1 inside the rotating drum 4.

[0022] The locking assembly includes a locking ring 402. An arc-shaped plate 403 is fixedly connected to the upper end of the rotating cylinder 4. The cross-sectional shape of the arc-shaped plate 403 is trapezoidal. The locking ring 402 is sleeved on the outer wall of the arc-shaped plate 403 and is threadedly connected to the arc-shaped plate 403.

[0023] A suction cup 207 is installed at the end of the sealing ring 205 away from the annular groove 204, and the suction cup 207 is threadedly connected to the sealing ring 205.

[0024] Specifically, the heat exchange tubes of the heat exchanger are fixed to two tube sheets by welding or expansion. Therefore, before cleaning the tubes of the heat exchanger, it is necessary to use high-pressure water to flush and clean the outer surface of the tube sheet. After cleaning the tube sheet, the operator first rotates the locking ring 402, causing it to rotate upwards relative to the arc-shaped plate 403. Since the cross-sectional shape of the arc-shaped plate 403 is trapezoidal, the arc-shaped surface of the arc-shaped plate 403 away from the spiral cylinder 201 is inclined. The upward rotation of the locking ring 402 prevents it from pressing against the inclined arc surface of the arc-shaped plate 403, thus preventing the arc-shaped plate 403 from pressing against the outer wall of the cleaning rod 1. Pulling the cleaning rod 1 then allows the cleaning rod to move. The rod 1 can slide downward relative to the rotating cylinder 4, so that the cleaning rod 1 pushes the cleaning head 3 out of the support cylinder 2, and then rotates the locking ring 402 in the opposite direction, so that the locking ring 402 rotates downward and locks the arc plate 403. Since the cross section of the arc plate 403 is trapezoidal, the locking ring 402 pushes the multiple arc plates 403 surrounding the cleaning rod 1 to press against the surface of the support rod through the inclined surface of the arc plate 403, so that the rotating cylinder 4 is clamped and connected to the cleaning rod 1 through the arc plate 403. After the cleaning head 3 extends out of the support cylinder 2, the cleaning rod 1 is lifted so that the cleaning rod 1 drives the cleaning head 3 to be coaxially aligned with the heat exchange tube to be cleaned. Since the outer diameter of the cleaning head 3 is slightly smaller than the inner diameter of the heat exchange tube, the cleaning head 3 can be inserted into the tube opening. Then, the support cylinder 2 is pushed close to the tube sheet, so that the support cylinder 2 drives the sealing ring 205 and the suction cup 207 to approach and gradually adhere to the outer wall of the tube sheet. The axial thrust is continuously applied so that the sealing ring 205 squeezes the suction cup 207, thereby completely expelling the air between the suction cup 207 and the tube sheet. At this time, the suction cup 207 is subjected to negative pressure, so that the suction cup 207 is firmly adsorbed on the surface of the tube sheet. After the positioning between the support cylinder 2 and the tube sheet is completed, the rotating cylinder 4 is rotated so that the rotating cylinder 4 drives the cleaning rod 1 to rotate synchronously in the circumferential direction through the upper arc plate 403. This causes the cleaning rod 1 to drive the cleaning head 3 connected to one end to rotate in the pipe, so that the cleaning head 3 can polish and clean the scale layer on the pipe wall through the brush plate 302 installed on the outer wall. After the support cylinder 2 is positioned and connected to the tube sheet sidewall, continue to push the support cylinder 2 closer to the tube sheet, causing the support cylinder 2 to move synchronously with the sealing ring 205. The sealing ring 205 is then blocked by the tube sheet sidewall and enters the annular groove 204. This forces the hydraulic oil in the annular groove 204 to be squeezed through the oil passage 206 into the positioning groove 202. The hydraulic oil entering the positioning groove 202 pushes the positioning rod 203 out of the positioning groove 202, bringing the positioning rod 203 closer to the rotating cylinder 4 until it contacts the outer wall of the rotating cylinder 4. Then, the user rotates the rotating cylinder 4, causing the spiral groove 401 on its surface to rotate. At this time, the positioning rod 203... 3 slides in contact with the outer wall of the rotating drum 4 until the spiral groove 401 rotates to engage with the positioning rod 203. The positioning rod 203 is pushed by hydraulic oil and inserted into the spiral groove 401. At this time, the support cylinder 2 and the rotating drum 4 are connected by the spiral drive through the positioning rod 203. Subsequently, when the rotating drum 4 is rotated, the positioning rod 203 of the spiral cylinder 201 slides along the spiral groove 401 of the rotating drum 4, so that the positioning rod 203 pushes the rotating drum 4 and the cleaning rod 1 to be axially fed into the pipe. This allows the cleaning rod 1 to push the cleaning head 3 to rotate and penetrate into the pipe of the heat exchange tube. This allows the cleaning head 3 to efficiently grind and peel off the scale on the inner wall of the pipe through the brush plate 302 on the surface. In addition, the cleaning rod 1 drives the cleaning head 3 to complete the combined motion of circumferential rotation and axial feeding. The rotating cleaning head 3 covers all angle areas of the inner wall of the heat exchange tube through the brush plate 302 on its surface. Through continuous and stable radial scraping force, it effectively removes stubborn scale from irregular parts such as tube wall pits, circumferential welds, and interface gaps. Compared with the traditional unidirectional brushing method, the overall cleaning coverage is higher and the descaling efficiency is stronger. This completely solves the problem of dead corners and blind spots in the traditional cleaning method, thereby improving the cleaning effect of the present invention on scale inside the pipe. When the heat exchanger is running, the fluid entering the heat exchange tube will form a local stagnant zone at the junction of the tube sheet and the tube opening, which allows calcium and magnesium ions and suspended particles to have enough time to deposit on the tube wall at both ends of the heat exchange tube. This results in the thickness and hardness of the scale layer at both ends of the heat exchange tube being significantly higher than that in the middle of the tube section. As a result, the cleaning head 3 is blocked by the excessively thick scale layer at both ends of the heat exchange tube and cannot penetrate into the heat exchange tube. To address this, a threaded connection is made between the cleaning rod 1 and the cleaning head 3, allowing for flexible installation of the cleaning rod 1 and the cleaning head 3. When cleaning scale at both ends of the heat exchange tube, a large-sized cleaning head 3 with an outer diameter larger than the inner diameter of the heat exchange tube is selected and fixed to the end of the cleaning rod 1 via a threaded connection. Since the cleaning head 3 is designed as a frustum-shaped cone with a narrow bottom and a wide top, with a small-diameter guide end at the bottom, multiple sets of mounting grooves 301 are opened circumferentially on the conical curved surface. A magnet 303 is embedded on the back of the brush plate 302. In the initial state, the brush plate 302 is attracted and fixed in the mounting groove 301 by the magnetic attraction of the magnet 303, and the whole is in an inclined state that matches the conical surface. During operation, the small end of the cleaning head 3 is aligned with the pipe opening. The conical guide allows the brush plate 302 in the conical area to contact the hardened scale layer at the pipe opening. The rotating drum 4 drives the cleaning rod 1 to rotate. The cleaning head 3 simultaneously applies extrusion pressure and circumferential grinding force to the scale layer at the pipe opening, thereby quickly breaking and peeling off the dense hard scale layer inside the pipe opening, opening up a channel for subsequent deep cleaning inside the pipe. After the pre-cleaning of the pipe opening is completed, the cleaning head 3 with an outer diameter that matches the inner diameter of the heat exchange tube is replaced and sent into the pipe opening. After the support cylinder 2 and the tube sheet surface are positioned and fixed by the suction cup 207, the pushing component is controlled to push the multiple brush plates 302 arranged in the circumferential direction to flip and unfold outward until the grinding surface of the brush plate 302 is in contact with the tube wall. Then the cleaning head 3 is driven to rotate. The high-speed rotating cleaning head 3 drives the brush plate 302 to continuously grind and peel off the scale layer on the entire tube wall, thereby achieving efficient cleaning of the scale in the pipeline. This invention features a cleaning head 3 that can extend into the pipe, with multiple wear-resistant brush plates 302 evenly spaced around the cleaning head 3. During operation, the rotating drum 4 drives the cleaning head 3 to rotate synchronously around the brush plates 302, achieving a comprehensive cleaning of the pipe wall without dead angles, in conjunction with the axial feeding action. It applies a stable radial scraping force to areas such as pipe joint gaps, which not only thoroughly removes the scale embedded in dead angles that traditional unidirectional cleaning cannot reach, but also improves the scale removal efficiency and the uniformity of cleaning the inner wall of the pipe.

[0025] Please see the appendix Figure 6 - Appendix Figure 9 The pushing assembly includes a pushing rod 304. The cleaning head 3 has a groove 305 inside that communicates with the mounting groove 301. The pushing rod 304 is slidably and sealingly connected in the groove 305. The cleaning head 3 has a cylindrical groove 306 inside. A rotating plate 307 is threadedly connected to the cylindrical groove 306 of the cleaning head 3. A connecting unit is installed inside the cleaning rod 1. The connecting unit is used to connect the rotating plate 307.

[0026] The connecting unit includes a connecting block 101. A cylindrical cavity 102 is opened inside the cleaning rod 1. A rotating rod 103 is rotatably connected inside the cylindrical cavity 102. Rectangular grooves 104 are opened at both ends of the rotating rod 103. The connecting block 101 is slidably connected in the rectangular groove 104 located below the rotating rod 103. The connecting block 101 and the bottom of the rectangular groove 104 are fixedly connected by a connecting spring 105. A connecting groove 308 that mates with the connecting block 101 is opened at the upper end of the rotating plate 307.

[0027] The upper end of the cleaning rod 1 has a threaded groove 106.

[0028] Specifically, when the cleaning rod 1 is threadedly connected to the connector, the cleaning rod 1 drives the internal rotating rod 103 to approach the rotating plate 307, so that the connecting block 101 in the rectangular groove 104 at the lower end of the rotating rod 103 contacts the rotating plate 307. The connecting block 101 is blocked by the rotating plate 307 and squeezes the connecting spring 105 into the rectangular groove 104. Since the rotating rod 103 is rotatably connected in the cylindrical cavity 102, the inner wall of the cylindrical cavity 102 is made smooth by spraying a PTFE coating inside the cylindrical cavity 102, which reduces the friction between the rotating rod 103 and the inner wall of the cylindrical cavity 102. At this time, the cleaning rod 1 rotates relative to the rotating rod 103. After the cleaning rod 1 is threadedly connected to the cleaning head 3, the user inserts a tool into the rectangular groove 104 at the upper end of the rotating rod 103, thereby rotating the rotating rod 103. This causes the rotating rod 103 to drive the connecting block 101 in the lower rectangular groove 104 to rotate. After the connecting block 101 engages with the connecting groove 308 at the upper end of the rotating plate 307, the connecting block 101 is pushed into the connecting groove 308 of the rotating plate 307 by the restoring force of the connecting spring 105. As the rotating rod 103 continues to rotate, it pushes the inner wall of the connecting groove 308 through the connecting block 101, thereby driving the rotating plate. 307 rotates, causing the rotating plate 307 to spiral into the cylindrical groove 306. The hydraulic oil in the cylindrical groove 306 is pushed into the groove 305 by the rotating plate 307. The hydraulic oil in the groove 305 can push the push rod 304 out of the groove 305. The push rod 304 out of the groove 305 enters the mounting groove 301 and pushes the brush plate 302 in the mounting groove 301 to rotate away from the mounting groove 301. This causes the brush plate 302 to flip outward and continuously approach the scale layer on the inner wall of the pipe, thereby ensuring that the brush plate 302 can rotate stably and peel off the scale layer in the pipe. By providing a threaded groove 106 at the upper end of the rotating rod 103, adjacent cleaning rods 1 can be threaded together, thereby increasing the length of the cleaning rod 1 and ensuring that the cleaning rod 1 can push the cleaning head 3 to clean scale from longer heat exchange tubes, thus improving the applicability of the present invention.

[0029] Please see the appendix Figure 1 - Appendix Figure 9A bellows 208 is provided between the spiral cylinder 201 and the support cylinder 2. One end of the bellows 208 is fixedly connected to the support cylinder 2, and the other end is fixedly connected to the spiral cylinder 201.

[0030] A corrugated airbag 404 is provided between the rotating drum 4 and the spiral drum 201. A feed pipe 405 is connected to one side of the corrugated airbag 404. A water outlet 209 is provided on the inner wall of the support cylinder 2. A spring hose 210 is provided between the rotating drum 4 and the support cylinder 2. One end of the spring hose 210 is connected to the corrugated airbag 404, and the other end is connected to the water outlet 209.

[0031] One-way valves are installed in both the feed pipe 405 and the water outlet 209, and the spring hose 210 is located inside the bellows 208.

[0032] The brush plate 302 has a strip groove 309 at one end away from the mounting groove 301. The side wall of the brush plate 302 has an insertion hole 310 communicating with the strip groove 309. A grinding plate 311 is installed in the strip groove 309. The side wall of the grinding plate 311 has a connecting hole 312 that is directly opposite to the insertion hole 310. A plug rod 313 is slidably and sealingly connected in the insertion hole 310.

[0033] Specifically, when the rotating drum 4 rotates relative to the spiral drum 201, the corrugated airbag 404 between the rotating drum 4 and the spiral drum 201 is compressed by the rotating drum 4, causing the gas inside the corrugated airbag 404 to flow into the water outlet 209 through the spring hose 210 connected at the lower end. This allows the gas ejected from the water outlet 209 to be blown into the pipe, and the airflow blown into the pipe can blow towards the brush plate 302, causing the scale that has fallen off and adhered to the surface of the brush plate 302 to be blown off. This ensures that the scale that has fallen off the brush plate 302 and the inner wall of the pipe will not be blocked by the scale that has been polished off, thus improving the performance of the brush plate 302. The high-efficiency brush plate 302 effectively cleans scale on the inner wall of the pipe because the corrugated airbag 404 has an inlet pipe 405 installed on its side wall. If the inlet pipe 405 is connected to an external water source, and water flows into the corrugated airbag 404 through the inlet pipe, the water entering the corrugated airbag 404 will accelerate its flow due to the compression of the corrugated airbag 404 when the corrugated airbag 404 is squeezed. This increases the force of the water sprayed onto the pipe through the outlet, thereby increasing the impact effect of the water flow on the brush plate 302 in the pipe, and accelerating the removal of scale and debris adhering to the surface of the brush plate 302. By setting the bellows 208, the bellows 208 and the bellows airbag 404 can shield the spiral groove 401 on the surface of the rotating drum 4, preventing external impurities from entering the spiral groove 401 and blocking the normal transmission between the rotating drum 4 and the spiral drum 201. Moreover, the spring hose 210 is installed inside the bellows 208, so that the bellows 208 can protect the spring hose 210, preventing the spring hose 210 from being scratched by collisions with external hard objects during transportation, and improving the service life of the spring hose 210. By setting the grinding plate 311, the grinding plate 311 is installed in the strip groove 309 of the brush plate 302. By inserting the insertion rod 313 into the insertion hole 310, the insertion rod 313 can pass through the insertion hole 310 and enter the connection hole 312 of the grinding plate 311, thereby realizing the quick-release connection between the grinding plate 311 and the brush plate 302. When the grinding plate 311 is worn or the grinding efficiency decreases, the grinding plate 311 can be replaced by simply pulling out the plug 313, without having to replace the entire brush plate 302. This reduces production costs, lowers the overall disassembly and assembly difficulty, and improves maintenance efficiency. Furthermore, different functions of the grinding plate 311 can be prefabricated according to working conditions, including installing high-roughness diamond grit, hard metal protrusions, or bristles on the grinding surface of the grinding plate 311. The grinding plate 311 with high-roughness diamond grit and hard metal protrusions can efficiently break up dense scale with high hardness, while the grinding plate 311 with bristles can thoroughly remove loose floating scale and residue in crevices. By quickly replacing the grinding plate 311, it can be adapted to the cleaning needs of scale layers with different hardness, thereby improving the practicality of the present invention.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-directional brushing mechanism for pipe cleaning, comprising a cleaning rod (1), a support cylinder (2) sleeved on the surface of the cleaning rod (1), and a cleaning head (3) threadedly connected to one end of the cleaning rod (1), characterized in that: The cleaning head (3) is configured as a frustum, and the side wall of the cleaning head (3) is provided with a mounting groove (301). A brush plate (302) is rotatably mounted in the mounting groove (301). A magnet (303) is embedded on the side of the brush plate (302) near the mounting groove (301). A pushing component is installed inside the cleaning head (3). The pushing component is used to push the brush plate (302) to flip away from the mounting groove (301). A spiral cylinder (201) is fixedly installed on the upper end of the support cylinder (2). A rotating cylinder (4) is sleeved on the surface of the cleaning rod (1). A spiral groove (401) is opened on the outer wall of the rotating cylinder (4). A positioning groove (202) is opened on the inner wall of the spiral cylinder (201). A positioning rod (203) is slidably and sealed in the positioning groove (202) of the spiral cylinder (201). One end of the positioning rod (203) away from the positioning groove (202) is slidably connected in the spiral groove (401). The lower end of the support cylinder (2) is provided with an annular groove (204), and a sealing ring (205) is slidably and sealingly connected in the annular groove (204) of the support cylinder (2). An oil passage (206) is provided inside the support cylinder (2), one end of the oil passage (206) is connected to the annular groove (204), and the other end is connected to the positioning groove (202). A locking assembly is installed at the upper end of the rotating drum (4), which is used to lock the cleaning rod (1) inside the rotating drum (4).

2. The multi-directional brushing mechanism for pipe cleaning according to claim 1, characterized in that: The locking assembly includes a locking ring (402), and an arc plate (403) is fixedly connected to the upper end of the rotating cylinder (4). The arc plate (403) has a trapezoidal cross-sectional shape, and the locking ring (402) is sleeved on the outer wall of the arc plate (403). The locking ring (402) is threadedly connected to the arc plate (403).

3. The multi-directional brushing mechanism for pipe cleaning according to claim 1, characterized in that: A suction cup (207) is installed at the end of the sealing ring (205) away from the annular groove (204), and the suction cup (207) is threadedly connected to the sealing ring (205).

4. The multi-directional brushing mechanism for pipe cleaning according to claim 1, characterized in that: The pushing assembly includes a pushing rod (304), and the cleaning head (3) has a groove (305) inside that communicates with the mounting groove (301). The pushing rod (304) is slidably and sealingly connected in the groove (305). The cleaning head (3) has a cylindrical groove (306) inside. A rotating plate (307) is threadedly connected to the cylindrical groove (306) of the cleaning head (3). A connecting unit is installed inside the cleaning rod (1), and the connecting unit is used to connect the rotating plate (307).

5. A multi-directional brushing mechanism for pipe cleaning according to claim 4, characterized in that: The connecting unit includes a connecting block (101), the cleaning rod (1) has a cylindrical cavity (102) inside, a rotating rod (103) is rotatably connected inside the cylindrical cavity (102), the two ends of the rotating rod (103) have rectangular grooves (104), the connecting block (101) is slidably connected in the rectangular groove (104) located below the rotating rod (103), the connecting block (101) and the bottom of the rectangular groove (104) are fixedly connected by a connecting spring (105), and the upper end of the rotating plate (307) has a connecting groove (308) that cooperates with the connecting block (101).

6. A multi-directional brushing mechanism for pipe cleaning according to claim 5, characterized in that: The cleaning rod (1) has a threaded groove (106) at its upper end.

7. A multi-directional brushing mechanism for pipe cleaning according to claim 1, characterized in that: A bellows (208) is provided between the spiral cylinder (201) and the support cylinder (2). One end of the bellows (208) is fixedly connected to the support cylinder (2), and the other end is fixedly connected to the spiral cylinder (201).

8. A multi-directional brushing mechanism for pipe cleaning according to claim 5, characterized in that: A corrugated airbag (404) is provided between the rotating drum (4) and the spiral drum (201). A feed pipe (405) is connected to one side of the corrugated airbag (404). A water outlet hole (209) is opened on the inner wall of the support cylinder (2). A spring hose (210) is provided between the rotating drum (4) and the support cylinder (2). One end of the spring hose (210) is connected to the corrugated airbag (404), and the other end is connected to the water outlet hole (209).

9. A multi-directional brushing mechanism for pipe cleaning according to claim 8, characterized in that: One-way valves are installed in both the feed pipe (405) and the water outlet (209), and the spring hose (210) is located inside the bellows (208).

10. A multi-directional brushing mechanism for pipe cleaning according to claim 1, characterized in that: The brush plate (302) has a strip groove (309) at one end away from the mounting groove (301). The side wall of the brush plate (302) has an insertion hole (310) communicating with the strip groove (309). A grinding plate (311) is installed in the strip groove (309). The side wall of the grinding plate (311) has a connecting hole (312) facing the insertion hole (310). A plug rod (313) is slidably and sealingly connected in the insertion hole (310).

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