High-frequency brazing equipment special for air conditioner copper pipe

Abstract

The application relates to the technical field of high-frequency brazing equipment, in particular to special high-frequency brazing equipment for air conditioner copper pipes, which comprises an operation table, a mounting frame installed on the operation table, a fixing plate installed on the mounting frame, a clamping assembly installed on the fixing plate and comprising a clamping plate, a brazing assembly comprising a placing plate arranged above the clamping assembly, an electric telescopic rod installed on the placing plate, an output end of the electric telescopic rod penetrating through the placing plate and connected with a mounting plate, an induction coil arranged below the mounting plate, a smoke collecting assembly comprising a smoke collecting cover installed on the placing plate and provided with a smoke suction pipe connected with a suction pump, and the like.

Description

Technical Field

[0001] This invention relates to the field of high-frequency brazing equipment technology, specifically a high-frequency brazing equipment for air conditioning copper pipes. Background Technology

[0002] High-frequency brazing is a welding process that uses high-frequency current to locally heat and melt the brazing filler metal, and then uses surface tension to achieve a metal connection. It is mainly used for precision connections of materials such as stainless steel. During the production process of air conditioners, copper pipe fittings need to be welded by high-frequency brazing. In the existing technology, most copper pipe fittings of air conditioners are manually connected by inserting and connecting the ends. Then, the other end of the copper pipe is inserted into the positioning post, and the high-frequency brazing device is moved to the welding position by the telescopic component to perform welding. Because different air conditioner models require different diameters for copper pipe fittings, brazing different models of air conditioner copper pipe fittings requires replacing the corresponding positioning post, which is a rather cumbersome process. In addition, brazing produces a large amount of fumes when welding air conditioner copper pipes. These fumes contain dust and heat, and direct emission of them can affect the operator's working environment. Summary of the Invention

[0003] The purpose of this invention is to provide a high-frequency brazing equipment specifically for air conditioning copper pipes, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A high-frequency brazing equipment specifically for air conditioning copper pipes includes: An operating table is provided, on which two sets of symmetrically distributed mounting brackets are installed, and each set of mounting brackets is equipped with a fixing plate. The fixing plate is equipped with a clamping assembly for clamping copper tubes, and the clamping assembly includes a clamping plate. A brazing assembly for welding copper tubes includes a placement plate disposed above the clamping assembly, an electric telescopic rod mounted on the placement plate, the output end of the electric telescopic rod passing through the placement plate and connected to a mounting plate, and an induction coil disposed below the mounting plate. A fume collection assembly is used to collect the fumes generated during the welding of the brazing assembly. The fume collection assembly includes a fume hood installed on the placement plate, and the fume hood is provided with a fume extraction pipe connected to a pump.

[0005] Furthermore, a first guide groove is provided at the center of the upper end of the operating table, and a double-ended lead screw is rotatably installed inside the first guide groove. A first transmission motor is installed at the end of the operating table corresponding to the position of the double-ended lead screw, and the output end of the first transmission motor passes through the operating table and is connected to the double-ended lead screw. The first guide groove is provided with two sets of symmetrically distributed first guide blocks. The two sets of first guide blocks are respectively screwed to both ends of the double-ended lead screw, and the two sets of mounting brackets are connected to the corresponding first guide blocks.

[0006] Furthermore, the two sets of mounting brackets move closer to or further away from each other through the cooperation of the double-ended lead screw and the two sets of the first guide blocks; Each of the two sets of fixed plates has a recessed groove at the center of its sidewall that is close to each other. An adjusting plate is rotatably installed inside each recessed groove. A fourth motor is installed on the sidewall of the fixed plate corresponding to the center of the recessed groove. The output end of the fourth motor passes through the sidewall of the fixed plate and is connected to the adjusting plate.

[0007] Furthermore, the adjusting plate has a clearance groove inside, and an adjusting collar is rotatably arranged inside the clearance groove; The adjusting collar has multiple sets of circumferentially distributed arc-shaped guide grooves, and the side wall of the adjusting plate has radial guide grooves corresponding to the positions of each arc-shaped guide groove. The radial guide grooves penetrate the side wall of the adjusting plate and communicate with the clearance groove. Each of the radial guide grooves is fitted with a first connecting rod. One end of the first connecting rod passes through the radial guide groove and is slidably positioned inside the corresponding arc-shaped guide groove. The other end of the first connecting rod is connected to the clamping plate.

[0008] Furthermore, a countersunk hole is provided inside the adjusting plate at a position corresponding to the inner wall of the adjusting collar, and the countersunk hole communicates with the interior of the relief groove; A fifth motor is installed at the bottom of the countersunk hole, and a transmission gear is connected to the output end of the fifth motor. The inner wall of the adjusting collar is provided with a tooth groove that meshes with the tooth groove of the outer wall of the transmission gear at a position corresponding to the position of the outer wall of the transmission gear.

[0009] Furthermore, a second guide groove is provided at the center of the upper end of the operating table, and a first transmission screw is rotatably installed inside the second guide groove. A second transmission motor is installed at the end of the operating table corresponding to the position of the first transmission screw, and the output end of the second transmission motor passes through the operating table and is connected to the first transmission screw. A third guide block is slidably disposed inside the second guide groove, and the third guide block is screwed onto the first transmission screw.

[0010] Furthermore, a support plate is installed on the third guide block, and a third guide groove is opened at the center of one side wall of the support plate facing the fixed plate. A second transmission screw is rotatably arranged inside the third guide groove, and a third motor is installed at the upper end of the support plate corresponding to the position of the second transmission screw. The output end of the third motor passes through the support plate and is connected to the second transmission screw. A second guide block is slidably disposed inside the third guide groove. The second guide block is screwed onto the second transmission screw, and the placement plate is connected to the second guide block.

[0011] Furthermore, the output end of the electric telescopic rod passes through the shelf and is connected to a mounting plate. The induction coil is installed below the mounting plate and is connected to a high-frequency generator.

[0012] Furthermore, the outer wall of the smoke extraction pipe is provided with an insertion port that penetrates the side wall of the smoke extraction pipe, and an installation block is provided at the position of the insertion port on the smoke extraction pipe, and a filter screen is installed on the installation block at the position of the inside of the smoke extraction pipe. A fixing block is installed on the outer wall of the smoke extraction pipe at the end position corresponding to the mounting block, and the mounting block and the fixing block are connected by bolts.

[0013] Furthermore, a rotating shaft is rotatably provided at the center of the filter screen, and fan blades distributed in a circular pattern are provided at the upper end of the rotating shaft; The lower end of the rotating shaft passes through the filter screen and is connected to a second connecting rod. The end of the second connecting rod facing the filter screen has a storage groove. A scraper is provided inside the storage groove, and a return spring is provided between the bottom of the storage groove and the lower end of the scraper. The second connecting rod has a groove on one side corresponding to the scraper. The groove is located on one side where the scraper rotates. A collection box is installed inside the groove, and a guide plate that fits against the side wall of the scraper is installed on the side wall of the collection box near the scraper.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention uses the cooperation of a fifth motor and a transmission gear to drive the adjusting ring to rotate inside the adjusting plate. During the rotation of the adjusting ring, the cooperation of the arc-shaped guide groove and the radial guide groove drives multiple sets of clamping plates to move closer to each other, thereby clamping and welding copper tubes of different diameters. 2. The copper pipe is welded using an induction coil. During the welding process, the smoke is absorbed by the combination of the smoke hood and the smoke extraction pipe. During the absorption process, the smoke is filtered by the filter screen inside the smoke extraction pipe. 3. When the flue gas passes through the exhaust pipe, the airflow drives the fan blades to rotate, which in turn drives the second connecting rod to rotate via the shaft. During the rotation of the second connecting rod, the scraper, which is elastically connected to the second connecting rod, scrapes off the dust filtered by the filter screen, preventing the dust from clogging the filter screen's filter holes. The scraped-off dust is guided into the collection box through the guide plate for easy cleaning later. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic cross-sectional view of the operating table structure of the present invention; Figure 3 This is a schematic diagram showing the connection between the fixing plate and the adjusting plate of the present invention; Figure 4 This is a schematic diagram of the internal structure of the adjusting plate of the present invention; Figure 5 This is a schematic diagram showing the connection between the adjusting collar and the fifth motor structure of the present invention; Figure 6 This is a schematic diagram showing the structural connection between the support plate, the brazing assembly, and the smoke collection assembly of the present invention; Figure 7 This is a schematic diagram showing the connection between the storage plate and the induction coil structure of the present invention; Figure 8 This is a schematic diagram showing the connection between the smoke hood and the smoke extraction pipe of the present invention; Figure 9 This is an exploded view of the structure of the smoke extraction pipe and mounting block of the present invention; Figure 10 This is a cross-sectional schematic diagram of the connecting rod structure of the present invention.

[0016] In the diagram: 1. Control panel; 2. First guide groove; 3. First drive motor; 4. Second guide groove; 5. Second drive motor; 6. Support plate; 7. Third guide groove; 8. Third motor; 9. Storage plate; 10. Electric telescopic rod; 11. Smoke hood; 12. Smoke extraction pipe; 13. Mounting bracket; 14. Fixing plate; 15. Fourth motor; 16. Double-ended lead screw; 17. First drive lead screw; 18. First guide block; 19. Sinking groove; 20. Adjusting plate; 21. Clamping plate; 22. First connecting rod; 23. Relief groove; 24. Adjusting sleeve. 24. Ring, 25. Arc-shaped guide groove, 26. Radial guide groove, 27. Countersunk hole, 28. Transmission gear, 29. Gear groove, 30. Fifth motor, 31. Second guide block, 32. Third guide block, 33. Mounting plate, 34. Induction coil, 35. Mounting block, 36. Socket, 37. Fixing block, 38. Filter screen, 39. Rotating shaft, 40. Fan blade, 41. Second connecting rod, 42. Scraper, 43. Collection groove, 44. Reset spring, 45. Groove, 46. Collection box, 47. Guide plate, 48. Second transmission screw. Detailed Implementation

[0017] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples. Example 1

[0018] Please see Figures 1 to 10 This invention provides a technical solution: a high-frequency brazing equipment specifically for air conditioning copper pipes, comprising: The operating table 1 is equipped with two sets of symmetrically distributed mounting brackets 13, and each set of mounting brackets 13 is equipped with a fixing plate 14. The fixing plate 14 is equipped with a clamping assembly for clamping copper tubes. The clamping assembly includes a clamping plate 21. A brazing assembly for welding copper tubes includes a placement plate 9 disposed above the clamping assembly, an electric telescopic rod 10 mounted on the placement plate 9, the output end of the electric telescopic rod 10 passing through the placement plate 9 and connected to a mounting plate 33, and an induction coil 34 disposed below the mounting plate 33. A fume collection assembly is used to collect the fumes generated during the welding of the brazing assembly. The fume collection assembly includes a fume hood 11 installed on the storage plate 9, and the fume hood 11 is provided with a fume extraction pipe 12 connected to a pump.

[0019] In the above technical solution: the copper tube is clamped by a clamping assembly, and then the copper tube is welded by a brazing assembly. During the welding process, the fume collection assembly collects the fumes generated by the brazing assembly during welding. Example 2

[0020] like Figures 1-2 As shown, the high-frequency brazing equipment for air conditioning copper pipes disclosed in Embodiment 2 of the present invention has a structure that is basically the same as that in Embodiment 1, except that: The upper end of the operating table 1 is provided with a first guide groove 2 at the center position. A double-ended lead screw 16 is rotatably installed inside the first guide groove 2. A first transmission motor 3 is installed at the end of the operating table 1 corresponding to the position of the double-ended lead screw 16. The output end of the first transmission motor 3 passes through the operating table 1 and is connected to the double-ended lead screw 16. The first guide groove 2 is provided with two sets of symmetrically distributed first guide blocks 18. The two sets of first guide blocks 18 are respectively screwed to both ends of the double-ended lead screw 16, and the two sets of mounting brackets 13 are connected to the corresponding first guide blocks 18. The two sets of mounting brackets 13 move closer or further apart through the cooperation of the double-ended lead screw 16 and the two sets of first guide blocks 18; Each of the two sets of fixed plates 14 has a recessed groove 19 at the center of one side wall that is close to each other. An adjusting plate 20 is rotatably installed inside each recessed groove 19. A fourth motor 15 is installed on the side wall of the fixed plate 14 corresponding to the center of the recessed groove 19. The output end of the fourth motor 15 passes through the side wall of the fixed plate 14 and is connected to the adjusting plate 20.

[0021] In the above technical solution: through the cooperation of the first drive motor 3 and the double-headed lead screw 16, the two sets of mounting brackets 13 are driven to approach each other, thereby realizing the end docking of the two sets of copper pipes to be welded. Example 3

[0022] like Figures 3-5 As shown, the high-frequency brazing equipment for air conditioning copper pipes disclosed in Embodiment 3 of the present invention has a structure that is basically the same as that in Embodiment 2, except that: The adjusting plate 20 has a clearance groove 23 inside, and an adjusting collar 24 is rotatably arranged inside the clearance groove 23; The adjusting collar 24 has multiple sets of circumferentially distributed arc-shaped guide grooves 25. The side wall of the adjusting plate 20 has radial guide grooves 26 at the positions of each of the arc-shaped guide grooves 25. The radial guide grooves 26 penetrate the side wall of the adjusting plate 20 and communicate with the clearance groove 23. Each of the radial guide grooves 26 is provided with a first connecting rod 22 inserted inside. One end of the first connecting rod 22 passes through the radial guide groove 26 and is slidably positioned inside the corresponding arc guide groove 25. The other end of the first connecting rod 22 is connected to the clamping plate 21. The adjusting plate 20 has a countersunk hole 27 at a position corresponding to the inner wall of the adjusting collar 24, and the countersunk hole 27 communicates with the interior of the relief groove 23. A fifth motor 30 is installed at the bottom of the inner cavity 27. The output end of the fifth motor 30 is connected to a transmission gear 28. The inner wall of the adjusting collar 24 is provided with a tooth groove 29 that meshes with the tooth groove on the outer wall of the transmission gear 28 at a position corresponding to the position on the outer wall of the transmission gear 28.

[0023] In the above technical solution: through the cooperation of the fifth motor 30 and the transmission gear 28, the adjusting collar 24 is driven to rotate inside the adjusting plate 20. During the rotation, the adjusting collar 24, through the cooperation of the arc-shaped guide groove 25 and the radial guide groove 26, drives multiple sets of clamping plates 21 to move closer to each other, and clamps and welds copper tubes of different diameters. Example 4

[0024] like Figure 1 and Figures 6-7As shown, the high-frequency brazing equipment for air conditioning copper pipes disclosed in Embodiment 4 of the present invention has a structure that is basically the same as that in Embodiment 3, except that: A second guide groove 4 is provided at the center of the upper end of the operating table 1. A first transmission screw 17 is rotatably installed inside the second guide groove 4. A second transmission motor 5 is installed at the end of the operating table 1 corresponding to the position of the first transmission screw 17. The output end of the second transmission motor 5 passes through the operating table 1 and is connected to the first transmission screw 17. A third guide block 32 is slidably disposed inside the second guide groove 4, and the third guide block 32 is screwed onto the first transmission screw 17; A support plate 6 is installed on the third guide block 32. A third guide groove 7 is provided at the center of the side wall of the support plate 6 facing the fixed plate 14. A second transmission screw 48 is rotatably arranged inside the third guide groove 7. A third motor 8 is installed at the upper end of the support plate 6 corresponding to the position of the second transmission screw 48. The output end of the third motor 8 passes through the support plate 6 and is connected to the second transmission screw 48. The third guide groove 7 is slidably provided with a second guide block 31, which is screwed onto the second transmission screw 48, and the placement plate 9 is connected to the second guide block 31. The output end of the electric telescopic rod 10 passes through the shelf 9 and is connected to the mounting plate 33. The induction coil 34 is installed below the mounting plate 33 and is connected to a high-frequency generator.

[0025] In the above technical solution: after the copper tube is clamped, the second drive motor 5 is started. The second drive motor 5, in cooperation with the third guide block 32, drives the support plate 6 to move toward the copper tube, so that the induction coil 34 is located above the copper tube. Then the third motor 8 is started. In cooperation with the third motor 8 and the second guide block 31, the placement plate 9 and the induction coil 34 on the placement plate 9 are driven to move toward the copper tube and adjusted to a suitable distance, so as to facilitate the welding of copper tubes of different diameters. Example 5

[0026] like Figures 8-10 As shown, the high-frequency brazing equipment for air conditioning copper pipes disclosed in Embodiment 5 of the present invention has a structure that is basically the same as that in Embodiment 4, except that: The outer wall of the smoke extraction pipe 12 is provided with an insertion port 36 that penetrates the side wall of the smoke extraction pipe 12. A mounting block 35 is provided at the position of the insertion port 36 on the smoke extraction pipe 12. A filter screen 38 is installed on the mounting block 35 at the position of the inside of the smoke extraction pipe 12. A fixing block 37 is installed on the outer wall of the smoke extraction pipe 12 at the end position corresponding to the mounting block 35, and the mounting block 35 and the fixing block 37 are connected by bolts; The filter screen 38 is rotatably provided with a rotating shaft 39 at its center position, and the upper end of the rotating shaft 39 is provided with fan blades 40 distributed in a circular pattern. The lower end of the rotating shaft 39 passes through the filter screen 38 and is connected to a second connecting rod 41. The second connecting rod 41 has a storage groove 43 at one end facing the filter screen 38. A scraper 42 is provided inside the storage groove 43, and a return spring 44 is provided between the bottom end of the storage groove 43 and the lower end of the scraper 42. The second connecting rod 41 has a groove 45 on one side corresponding to the scraper 42. The groove 45 is located on one side of the scraper 42. A collection box 46 is installed inside the groove 45. A guide plate 47 that fits against the side wall of the scraper 42 is installed on the side wall of the collection box 46 near the scraper 42.

[0027] In the above technical solution: when the flue gas passes through the smoke extraction pipe 12, the airflow drives the fan blade 40 to rotate, which in turn drives the second connecting rod 41 to rotate through the rotating shaft 39. During the rotation of the second connecting rod 41, the scraper 42, which is elastically connected to the second connecting rod 41, scrapes off the dust filtered by the filter screen 38 to prevent the dust from clogging the filter holes on the filter screen 38. The scraped-off dust is guided into the collection box 46 through the guide plate 47 for easy cleaning later.

[0028] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A high-frequency brazing equipment specifically for air conditioning copper pipes, characterized in that, include: The operating table (1) is equipped with two sets of symmetrically distributed mounting brackets (13), and each set of mounting brackets (13) is equipped with a fixing plate (14). The fixing plate (14) is equipped with a clamping assembly for clamping copper tubes. The clamping assembly includes a clamping plate (21). A brazing assembly for welding copper pipes includes a storage plate (9) disposed above the clamping assembly, an electric telescopic rod (10) mounted on the storage plate (9), the output end of the electric telescopic rod (10) passing through the storage plate (9) and connected to a mounting plate (33), and an induction coil (34) disposed below the mounting plate (33). A smoke collection assembly is used to collect the fumes generated during the welding of the brazing assembly. The smoke collection assembly includes a smoke collection hood (11) installed on the storage plate (9), and the smoke collection hood (11) is provided with a smoke extraction pipe (12) connected to a pump.

2. The high-frequency brazing apparatus for a copper tube for an air conditioner according to claim 1, characterized in that, The upper end of the operating table (1) is provided with a first guide groove (2) at the center position. A double-headed screw (16) is rotatably installed inside the first guide groove (2). A first drive motor (3) is installed at the end of the operating table (1) corresponding to the position of the double-headed screw (16). The output end of the first drive motor (3) passes through the operating table (1) and is connected to the double-headed screw (16). The first guide groove (2) is provided with two sets of symmetrically distributed first guide blocks (18). The two sets of first guide blocks (18) are respectively screwed to both ends of the double-ended screw (16), and the two sets of mounting brackets (13) are connected to the corresponding first guide blocks (18).

3. The high-frequency brazing equipment for air conditioning copper pipes according to claim 2, characterized in that, The two sets of mounting brackets (13) move closer or further apart from each other through the cooperation of the double-ended lead screw (16) and the two sets of the first guide blocks (18); The two sets of fixed plates (14) are provided with a sinkhole (19) at the center of the side wall of each side wall that is close to each other. An adjustment plate (20) is rotatably installed inside each sinkhole (19). A fourth motor (15) is installed on the side wall of the fixed plate (14) at the center of the sinkhole (19). The output end of the fourth motor (15) passes through the side wall of the fixed plate (14) and is connected to the adjustment plate (20).

4. The high-frequency brazing equipment for air conditioning copper pipes according to claim 3, characterized in that, The adjustment plate (20) has a relief groove (23) inside, and an adjustment collar (24) is rotatably provided inside the relief groove (23). The adjusting collar (24) has multiple sets of circumferentially distributed arc-shaped guide grooves (25), and the side wall of the adjusting plate (20) has radial guide grooves (26) at the positions of each arc-shaped guide groove (25). The radial guide grooves (26) penetrate the side wall of the adjusting plate (20) and communicate with the clearance groove (23). Each of the radial guide grooves (26) is provided with a first connecting rod (22) inserted inside. One end of the first connecting rod (22) passes through the radial guide groove (26) and is slidably positioned inside the corresponding arc guide groove (25). The other end of the first connecting rod (22) is connected to the clamping plate (21).

5. The high-frequency brazing equipment for air conditioning copper pipes according to claim 4, characterized in that, The adjusting plate (20) has a countersunk hole (27) at a position corresponding to the inner wall of the adjusting collar (24), and the countersunk hole (27) communicates with the interior of the relief groove (23); The fifth motor (30) is installed at the bottom of the inner hole (27). The output end of the fifth motor (30) is connected to the transmission gear (28). The inner wall of the adjusting collar (24) is provided with a tooth groove (29) that meshes with the tooth groove of the outer wall of the transmission gear (28) at the position corresponding to the position of the outer wall of the transmission gear (28).

6. The high-frequency brazing equipment for air conditioning copper pipes according to claim 1, characterized in that, The upper end of the operating table (1) is provided with a second guide groove (4) at the center position. A first transmission screw (17) is rotatably installed inside the second guide groove (4). A second transmission motor (5) is installed at the end of the operating table (1) corresponding to the position of the first transmission screw (17). The output end of the second transmission motor (5) passes through the operating table (1) and is connected to the first transmission screw (17). A third guide block (32) is slidably disposed inside the second guide groove (4), and the third guide block (32) is screwed onto the first transmission screw (17).

7. The high-frequency brazing equipment for air conditioning copper pipes according to claim 6, characterized in that, A support plate (6) is installed on the third guide block (32). A third guide groove (7) is provided on the center of one side wall of the support plate (6) facing the fixed plate (14). A second transmission screw (48) is rotatably installed inside the third guide groove (7). A third motor (8) is installed at the upper end of the support plate (6) at the position corresponding to the second transmission screw (48). The output end of the third motor (8) passes through the support plate (6) and is connected to the second transmission screw (48). The third guide groove (7) is slidably provided with a second guide block (31), which is screwed onto the second transmission screw (48), and the placement plate (9) is connected to the second guide block (31).

8. The high-frequency brazing equipment for air conditioning copper pipes according to claim 7, characterized in that, The output end of the electric telescopic rod (10) passes through the shelf (9) and is connected to the mounting plate (33). The induction coil (34) is installed below the mounting plate (33) and is connected to a high-frequency generator.

9. The high-frequency brazing equipment for air conditioning copper pipes according to claim 1, characterized in that, The outer wall of the smoke extraction pipe (12) is provided with an inlet (36) that penetrates the side wall of the smoke extraction pipe (12). A mounting block (35) is provided at the position of the inlet (36) of the smoke extraction pipe (12). A filter screen (38) is installed at the position of the mounting block (35) corresponding to the internal position of the smoke extraction pipe (12). A fixing block (37) is installed on the outer wall of the smoke extraction pipe (12) at the end position corresponding to the mounting block (35), and the mounting block (35) and the fixing block (37) are connected by bolts.

10. The high-frequency brazing equipment for air conditioning copper pipes according to claim 9, characterized in that, The filter screen (38) is rotatably provided with a rotating shaft (39) at its center position, and the upper end of the rotating shaft (39) is provided with fan blades (40) distributed in a circular pattern. The lower end of the rotating shaft (39) passes through the filter screen (38) and is connected to a second connecting rod (41). The second connecting rod (41) has a storage groove (43) at one end facing the filter screen (38). A scraper (42) is provided inside the storage groove (43), and a return spring (44) is provided between the bottom end of the storage groove (43) and the lower end of the scraper (42). The second connecting rod (41) has a groove (45) on one side corresponding to the scraper (42). The groove (45) is located on one side of the scraper (42) when it rotates. A collection box (46) is installed inside the groove (45). A guide plate (47) that fits against the side wall of the scraper (42) is installed on the side wall of the collection box (46) near the scraper (42).

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