Cleaning equipment for micro copper conductor processing

Abstract

The invention belongs to the technical field of copper conductor processing, and discloses cleaning equipment for fine copper conductor processing, which comprises a machine body, U-shaped grooves are formed in the inner walls of the two ends of the machine body, a plurality of fine copper conductors can be discontinuously arranged in the machine body, and an efficient cleaning part is also arranged in the machine body; when the rectangular plate moves downwards passively and is not attached to the filter screen plate any more, the inclined panel cannot be extruded, so that the inclined panel cannot extrude the two springs, the two springs reset to drive the inclined panel to move upwards, the outer wall of the bottom of the inclined panel is flush with the inner wall of the top of the rectangular groove, and a downward-flowing cleaning agent can be well assisted; water flows into a group of liquid collecting boxes above through a notch in one end of the U-shaped groove, so that secondary utilization of the water is facilitated, a water wheel is driven by contact of water with impact force, a rubber rod is driven by water flow to synchronously rotate, friction force can be generated between the rubber rod and the surface of a fine copper conductor, and the fine copper conductor is driven by the friction force to move randomly; and the area for receiving water body cleaning is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of copper conductor processing, in particular to a cleaning device used for processing fine copper conductors. Background Art

[0002] Fine copper conductor is a material widely used in electromechanical engineering, mainly used for fire-resistant layer, insulation, sheath and filling. Copper conductor has important applications in many fields. For example, the copper conductor for high-flexibility drag chain cable and copper conductor for functional components produced by Chujiang New Materials have been successfully applied in the field of robotics, showing the practical value of copper conductor in high-tech fields. Copper is a metal and a conductor with good electrical conductivity. In terms of physical properties, copper conductor can change its internal energy by doing work. For example, when the copper wire is repeatedly bent, the mechanical energy will be converted into internal energy, causing the temperature of the copper wire to rise. At present, the processing and production process of fine copper conductors includes several cleaning steps to make them meet qualified sales standards. The cleaning process first requires them to be placed in a cleaning agent and soaked for 1-10 minutes, then rinsed with clean water, and then soaked in copper passivation liquid T402 for 1-3 minutes for passivation treatment. Finally, the fine copper conductors are rinsed with pure water and then dried. Existing cleaning equipment generally does not have the ability to perform integrated multi-function cleaning of fine copper conductors, and requires multiple transfers of fine copper conductors, so the efficiency of surface cleaning of fine copper conductors cannot be improved. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a cleaning device for processing fine copper conductors.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cleaning device for processing fine copper conductors, comprising a machine body, wherein the inner walls at both ends of the machine body are provided with U-shaped grooves, and a plurality of fine copper conductors can be intermittently arranged in the machine body, and a high-efficiency cleaning part is also provided in the machine body, and the high-efficiency cleaning part includes a filter screen fixedly connected to the inner wall of the machine body, and a rectangular plate can be intermittently attached to the bottom end of the filter screen, and a telescopic electric cylinder is fixedly connected to the bottom end of the rectangular plate, and the outer wall of the bottom end of the telescopic electric cylinder and the bottom of the machine body are connected. The inner wall of the two ends of the rectangular plate is fixedly connected, and rubber plug plates are fixedly connected to the outer walls of the two ends of the rectangular plate, and the two rubber plug plates are respectively simply slidably engaged with the inner walls of the two U-shaped grooves. A rectangular groove is opened on the outer wall of the top end of the rectangular plate, and two springs are fixedly connected to the inner wall of the bottom end of the rectangular groove, and the top ends of the two springs are jointly fixedly connected with an inclined panel, and the outer wall of the inclined panel and the inner wall of the rectangular groove are fitted and slidably connected, thereby the inclined panel can assist in cleaning and quickly draining water that soaks fine copper conductors.

[0005] Preferably, two liquid collecting boxes are fixedly connected to the outer walls at both ends of the body, and a support plate 1 is fixedly connected to the bottom end of the two groups of liquid collecting boxes. One end of the two groups of support plates 1 is fixedly connected to the outer walls at both ends of the body respectively.

[0006] Preferably, the upper group of liquid collecting tanks is used to collect cleaning agent and copper material passivation liquid T402, while the lower group of liquid collecting tanks is used to collect water for cleaning fine copper conductors.

[0007] Preferably, two support plates 2 are fixedly connected to the inner walls at both ends of the body, two groups of support plates 2 are fixedly connected to the top outer walls with bellows, and each of the bellows is fixedly connected to the top outer wall with an elastic telescopic part.

[0008] Preferably, the bottom end of each elastic telescopic member is fixedly connected to the corresponding two top outer walls of the support plate, and the bottom outer wall of the rectangular plate can be intermittently fitted and connected to each of the bellows and the top outer wall of each elastic telescopic member.

[0009] Preferably, one end of each of the bellows near the bottom is fixedly connected with a suction tube, and the other ends of the two groups of bellows near the bottom are respectively fixedly connected with a bent delivery pipe.

[0010] Preferably, the tube bodies of the two groups of suction tubes are respectively connected to the inner and outer walls at both ends of the body, and the tube bodies of the two bent delivery tubes are also connected to the inner and outer walls at both ends of the body near the bottom.

[0011] Preferably, each of the pumping pipes and the bent delivery pipe is fixedly connected to a one-way valve for controlling the one-way flow of water.

[0012] Preferably, a plurality of thin branch pipes are fixedly connected through a section of the pipe body of the two bent delivery pipes, and a rotating rod is provided in each group of the thin branch pipes.

[0013] Preferably, a water wheel is fixedly connected to the outer wall of each group of rotating rods near the top, and the top end of each group of rotating rods is movably sleeved with the top inner walls of the two bent pipes respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses the rectangular plate to strictly block the bottom end of the filter screen plate, so that multiple fine copper conductors are immersed at the same time. After soaking for a certain period of time, some impurities on the fine copper conductors will be separated by the cleaning agent, and then the telescopic electric cylinder can be started to drive the rectangular plate and the rubber plug plates on the two ends of the rectangular plate to move downward. The passively moving downward rubber plug plate will be separated from one end of the U-shaped groove and slide in its inner wall. At this time, the cleaning agent will flow down through one end of the U-shaped groove. At the same time, when the rectangular plate is passively moved down and no longer fits the filter screen plate, the filter screen plate will no longer squeeze the inclined plate. Therefore, the inclined plate is no longer subjected to force and will not squeeze the two springs in the rectangular groove. Then, after the two springs are reset, the inclined plate is driven to move up, and its bottom outer wall is flush with the top inner wall of the rectangular groove, which can well assist the downstream cleaning agent to flow into a group of liquid collecting boxes above through the notch at one end of the U-shaped groove, so as to be collected uniformly and facilitate its secondary utilization. The present invention drives the water wheel by contacting the water body with impact force, and then the rotating water wheel driven by the water flow will drive the rubber rod installed on the rotating rod to rotate synchronously. The rotating rubber rod can generate friction with the surface of the fine copper conductor, so that the fine copper conductor moves randomly under the drive of the friction force. At the same time, the water in the curved transmission pipe will also flow down into the fine branch pipe while driving the water wheel to rotate, and spray onto the fine copper conductor placed on the filter screen through the fine branch pipe. The fine copper conductor can be rinsed more comprehensively by the sprinkled water and the friction force, so that the area receiving water cleaning is increased. The telescopic electric cylinder moves up to drive the rectangular plate to reset and fit the bottom end of the filter screen again, which is convenient for introducing the copper material passivation liquid T402 and immersing the fine copper conductor for passivation treatment. The three steps of cleaning agent immersion, water rinsing, and copper material passivation liquid T402 passivation immersion can be directly realized at one time, without the need to repeatedly transfer the fine copper conductor 12 for cleaning in the processing link. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall planar front structure of the present invention; Figure 3 It is a schematic diagram of the overall plane section structure of the machine body of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the partially enlarged structure at center A; Figure 5 It is a schematic diagram of the partial cross-section split structure of the efficient cleaning part of the present invention; Figure 6 It is a schematic diagram of the local structure of the efficient cleaning part of the present invention; Figure 7 It is a schematic diagram of the overall cross-sectional structure of the efficient cleaning part and the bent pipe of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the local enlarged structure at point B in the middle.

[0016] In the figure: 1. Machine body; 11. U-shaped groove; 12. Fine copper conductor; 2. High-efficiency cleaning unit; 21. Filter screen; 22. Rectangular plate; 23. Telescopic electric cylinder; 24. Rubber plug plate; 25. Rectangular groove; 26. Spring; 27. Inclined plate; 28. Liquid collecting box; 29. ​​Support plate 1; 230. Support plate 2; 231. Bellows; 232. Elastic telescopic part; 233. Pumping tube; 234. Bending pipe; 235. One-way valve; 236. Thin branch pipe; 237. Turning rod; 238. Water wheel; 239. Rubber rod. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figures 1 to 8 As shown, the present invention provides a cleaning device for fine copper conductor processing, including a body 1, U-shaped grooves 11 are provided in the inner walls at both ends of the body 1, a plurality of fine copper conductors 12 can be intermittently provided in the body 1, and a high-efficiency cleaning part 2 is also provided in the body 1, and the high-efficiency cleaning part 2 includes a filter screen plate 21 fixedly connected to the inner wall of the body 1, and a rectangular plate 22 can be intermittently fitted and connected to the bottom end of the filter screen plate 21, and a telescopic electric cylinder 23 is fixedly connected to the bottom end of the rectangular plate 22, and the bottom outer wall of the telescopic electric cylinder 23 is fixedly connected to the bottom inner wall of the body 1. The outer walls of both ends of the rectangular plate 22 are fixedly connected with rubber plug plates 24, and the two rubber plug plates 24 are respectively simply slidably engaged with the inner walls of the two U-shaped grooves 11. A rectangular groove 25 is opened on the outer wall of the top end of the rectangular plate 22, and two springs 26 are fixedly connected in the inner wall of the bottom end of the rectangular groove 25, and the top ends of the two springs 26 are jointly fixedly connected with an inclined plate 27, and the outer wall of the inclined plate 27 and the inner wall of the rectangular groove 25 are fitted and slidably connected, thereby the inclined plate 27 can assist in the rapid discharge of water for cleaning and soaking fine copper conductors.

[0019] The above scheme is adopted: under the strict isolation of the bottom end of the filter screen plate 21 by the rectangular plate 22, multiple fine copper conductors 12 are immersed at the same time. After being immersed for a certain period of time, some impurities contained in the fine copper conductors 12 will be separated by the cleaning agent, and then the telescopic electric cylinder 23 can be started to drive the rectangular plate 22 and the rubber plug plates 24 on both ends of the rectangular plate 22 to move downward. The passively moved rubber plug plate 24 will be separated from one end of the U-shaped groove 11 and slide on its inner wall. At this time, the cleaning agent will flow down through one end of the U-shaped groove 11. At the same time, When the rectangular plate 22 is passively moved downward and no longer fits with the filter screen plate 21, the filter screen plate 21 will no longer squeeze the inclined plate 27. As a result, the inclined plate 27 is no longer subjected to force and will also not squeeze the two springs 26 in the rectangular groove 25. Then, after the two springs 26 are reset, the inclined plate 27 is driven to move upward, and its bottom outer wall is flush with the top inner wall of the rectangular groove 25, which can well assist the downstream cleaning agent to flow into a group of liquid collection boxes 28 above through the notch at one end of the U-shaped groove 11, so as to be collected uniformly and facilitate its secondary utilization.

[0020] Two liquid collecting boxes 28 are fixedly connected to the outer walls at both ends of the body 1, and support plates 29 are fixedly connected to the bottom ends of the two groups of liquid collecting boxes 28. One ends of the two groups of support plates 29 are fixedly connected to the outer walls at both ends of the body 1 respectively. The upper group of liquid collecting boxes 28 is used to collect cleaning agents and copper passivation liquid T402, while the lower group of liquid collecting boxes 28 is used to collect water for cleaning fine copper conductors. Two support plates 230 are fixedly connected to the inner walls at both ends of the body 1, and bellows 231 are fixedly connected to the top outer walls of the two groups of support plates 230. An elastic telescopic part 232 is fixedly connected to the top outer wall of each bellows 231. The bottom end of each elastic telescopic part 232 is fixedly connected to the corresponding outer wall of the top end of the support plate 230. The bottom outer wall of the rectangular plate 22 can be intermittently fitted and connected to the top outer wall of each bellows 231 and each elastic telescopic part 232.

[0021] By adopting the above scheme, the downwardly moved rectangular plate 22 will drive the rubber plug plates 24 at both ends to be clamped into the notches at the lower end of the U-shaped groove 11 again, and then disengage again after moving downward. During this process, the downwardly moved rectangular plate 22 will squeeze the bellows 231 and the elastic telescopic member 232, causing the two to move downward and shrink at the same time.

[0022] A suction pipe 233 is fixedly connected to one end of each bellows 231 near the bottom, and a bent delivery pipe 234 is jointly connected and fixedly connected to the other ends of the two groups of bellows 231 near the bottom. The tube bodies of the two groups of suction pipes 233 are respectively fixedly connected to the inner and outer walls of the body 1 at both ends, and the tube bodies of the two bent delivery pipes 234 are also fixedly connected to the inner and outer walls of the body 1 at both ends near the bottom. A one-way valve 235 is fixedly connected to the tube body of each suction pipe 233 and the bent delivery pipe 234 for controlling the unidirectional flow of water.

[0023] By adopting the above scheme, the squeezed bellows 231 will drive the cleaning water in the inner cavity that has passed through the elastic expansion member 232 in advance, and then drive the cleaning water that has been drawn into the inner cavity through the suction tube 233 to enter the bent delivery tube 234 by impact force.

[0024] A plurality of thin branch pipes 236 are fixedly connected to a section of the pipe body of the two curved delivery pipes 234, and a rotating rod 237 is provided in each group of thin branch pipes 236. A water wheel 238 is fixedly connected to the outer wall of each group of rotating rods 237 near the top, and the top end of each group of rotating rods 237 is movably connected to the inner wall of the top end of the two curved delivery pipes 234.

[0025] According to the above scheme, water in the curved delivery pipe 234 contacts the water wheel 238 installed on the rotating rod 237, and then the rotating water wheel 238 driven by the water flow drives the rubber rod 239 installed on the rotating rod 237 to rotate synchronously. The rotating rubber rod 239 can generate friction with the surface of the fine copper conductor 12, so that the fine copper conductor 12 moves randomly under the drive of the friction. At the same time, the water in the curved delivery pipe 234 will also flow down to the fine branch pipe 236 while driving the water wheel 238 to rotate, and then spray down to the filter screen 21 through the fine branch pipe 236. The fine copper conductor 12 can be rinsed more comprehensively by the sprinkled water and the friction force, so that the area receiving the water cleaning is increased, and the telescopic electric cylinder 23 moves up to drive the rectangular plate 22 to reset and fit the bottom of the filter plate 21 again, which is convenient for introducing the copper passivation liquid T402 and soaking the fine copper conductor 12 for passivation treatment. The three steps of cleaning agent soaking, water rinsing, and copper passivation liquid T402 passivation soaking can be directly realized at one time, without the need to repeatedly transfer the fine copper conductor 12 for cleaning in the processing link.

[0026] It should be added that the random movement of the fine copper conductor 12 driven by friction refers to the uncontrollable displacement or rotation of a certain angle under passive movement, and does not specifically refer to any dynamic state.

[0027] The working principle and use process of the present invention are as follows: a plurality of fine copper conductors 12 to be cleaned are sequentially placed into the machine body 1, placed on the top of the filter screen plate 21, and connected thereto in a close fit; then, a cleaning agent can be manually poured in, and the plurality of fine copper conductors 12 are simultaneously immersed under the strict isolation of the bottom of the filter screen plate 21 by the rectangular plate 22; after being immersed for a certain period of time, some impurity materials contained on the fine copper conductors 12 will be separated by the cleaning agent; then, the telescopic electric cylinder 23 can be started to drive the rectangular plate 22 and the rubber plug plates 24 at both ends of the rectangular plate 22 to move downward; the passively moved rubber plug plate 24 will be separated from one end of the U-shaped groove 11 and slide on its inner wall; at this time, the cleaning agent will pass through the U-shaped groove 11. At the same time, when the rectangular plate 22 is passively moved downward and no longer fits with the filter screen plate 21, the filter screen plate 21 will no longer squeeze the inclined plate 27, so that the inclined plate 27 is no longer subjected to force and will also not squeeze the two springs 26 in the rectangular groove 25. Then, after the two springs 26 are reset, the inclined plate 27 is driven to move upward, and its bottom outer wall is flush with the top inner wall of the rectangular groove 25, which can well assist the downstream cleaning agent to flow into a group of liquid collecting boxes 28 above through the notch at one end of the U-shaped groove 11, and the purpose of unified collection is to facilitate its secondary use. Then the rectangular plate 22 that moves downward will drive the rubber plug plates 24 at both ends to be clamped into the notch at the lower end of the U-shaped groove 11 again, and then it will be separated again after moving downward; During this process, the downwardly moving rectangular plate 22 will squeeze the bellows 231 and the elastic expansion member 232, causing the two to move downward and shrink at the same time. At this time, the squeezed bellows 231 will drive the cleaning water in the inner cavity that has passed through the elastic expansion member 232 in advance and drawn into the inner cavity through the suction tube 233, and then drive the impact force to enter the bent delivery pipe 234. As a result, the water will contact the water wheel 238 installed on the driving rod 237 in the bent delivery pipe 234, and then the water wheel 238 driven by the water flow will drive the rubber rod 239 also installed on the rotating rod 237 to rotate. The rotating rubber rod 239 can generate friction with the surface of the fine copper conductor 12, so that the fine copper conductor 12 moves randomly under the influence of the friction. At the same time, the water in the curved pipe 234 will flow down into the fine branch pipe 236 while driving the water wheel 238 to rotate, and then spray down onto the fine copper conductor 12 placed on the filter screen 21 through the fine branch pipe 236. The fine copper conductor 12 can be rinsed more comprehensively by the sprinkled water and the friction, so that the area receiving the water cleaning is increased, and the water after cleaning is With the help of the inclined plate 27, the liquid will naturally flow from the notches of the U-shaped grooves 11 at both ends of the body 1 into the liquid collecting box 28 below. At this time, the telescopic electric cylinder 23 moves up to drive the rectangular plate 22 to reset and fit the bottom of the filter screen plate 21 again, which is convenient for introducing the copper passivation liquid T402 to soak the fine copper conductor 12 for passivation treatment. When the rectangular plate 22 moves up and resets, the bellows 231 will also move up and reset immediately under the drive of the elastic telescopic member 232. At this time, a negative pressure suction force is generated inside the bellows 231, thereby passing the suction pipe 233 to the liquid collecting box 28 below. 8 is sucked out for recycling, thus avoiding the waste of water resources. The three steps of cleaning agent immersion, water rinsing, and copper material passivation liquid T402 immersion can be directly realized at one time in the machine body 1. There is no need to repeatedly transfer the fine copper conductor 12 for cleaning in the processing link. Finally, the fine copper conductor 12 soaked in the copper material passivation liquid T402 can be taken out manually and soaked in pure water using the existing technology. After the surface of the fine copper conductor 12 is rinsed clean, the final drying link can be directly carried out.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cleaning device for processing fine copper conductors, comprising a body (1), characterized in that: U-shaped grooves (11) are provided in the inner walls at both ends of the machine body (1); a plurality of fine copper conductors (12) can be intermittently provided in the machine body (1); a high-efficiency cleaning section (2) is also provided in the machine body (1); the high-efficiency cleaning section (2) comprises a filter screen (21) fixedly connected to the inner wall of the machine body (1); a rectangular plate (22) can be intermittently fitted and connected to the bottom end of the filter screen (21); a telescopic electric cylinder (23) is fixedly connected to the bottom end of the rectangular plate (22); the outer wall of the bottom end of the telescopic electric cylinder (23) is fixedly connected to the inner wall of the bottom end of the machine body (1); the rectangular plate (22) is Rubber plug plates (24) are fixedly connected to the outer walls at both ends, and the two rubber plug plates (24) are respectively simply slidably engaged with the inner walls of the two U-shaped grooves (11). A rectangular groove (25) is provided on the outer wall at the top end of the rectangular plate (22). Two springs (26) are fixedly connected to the inner wall at the bottom end of the rectangular groove (25), and the top ends of the two springs (26) are jointly fixedly connected with an inclined plate (27). The outer wall of the inclined plate (27) and the inner wall of the rectangular groove (25) are fitted and slidably connected, so that the inclined plate (27) can assist in the rapid discharge of water used for cleaning and soaking fine copper conductors.

2. The cleaning device for fine copper conductor processing according to claim 1, characterized in that: Two liquid collecting boxes (28) are respectively fixedly connected to the outer walls at both ends of the machine body (1), and a support plate (29) is fixedly connected to the bottom ends of the two sets of liquid collecting boxes (28), and one end of the two sets of support plates (29) is respectively fixedly connected to the outer walls at both ends of the machine body (1).

3. The cleaning device for fine copper conductor processing according to claim 2, characterized in that: The upper group of liquid collecting boxes (28) is used to collect cleaning agent and copper material passivation liquid T402, while the lower group of liquid collecting boxes (28) is used to collect water for cleaning fine copper conductors.

4. The cleaning device for fine copper conductor processing according to claim 3, characterized in that: Two support plates (230) are fixedly connected to the inner walls at both ends of the body (1), and bellows (231) are fixedly connected to the top outer walls of the two groups of support plates (230). An elastic telescopic member (232) is fixedly connected to the top outer wall of each bellows (231).

5. The cleaning device for fine copper conductor processing according to claim 4, characterized in that: The bottom end of each of the elastic and telescopic parts (232) is fixedly connected to the top outer wall of the corresponding support plate 2 (230), and the bottom outer wall of the rectangular plate (22) can be intermittently fitted and connected to the top outer wall of each of the bellows (231) and each of the elastic and telescopic parts (232).

6. The cleaning device for fine copper conductor processing according to claim 5, characterized in that: A suction pipe (233) is fixedly connected to one end of each of the bellows (231) close to the bottom, and a bent delivery pipe (234) is fixedly connected to the other ends of the two groups of bellows (231) close to the bottom.

7. The cleaning device for fine copper conductor processing according to claim 6, characterized in that: The tube bodies of the two groups of extraction tubes (233) are respectively connected to the inner and outer walls at both ends of the machine body (1) through penetration and fixation, and the tube bodies of the two bent delivery tubes (234) are also connected to the inner and outer walls at both ends of the machine body (1) near the bottom through penetration and fixation.

8. The cleaning device for fine copper conductor processing according to claim 7, characterized in that: A one-way valve (235) is fixedly connected to the pipe body of each of the extraction pipes (233) and the bent delivery pipe (234) to control the one-way flow of water.

9. The cleaning device for fine copper conductor processing according to claim 8, characterized in that: A plurality of thin branch pipes (236) are fixedly connected through a section of the pipe body of the two bent delivery pipes (234), and a rotating rod (237) is provided in each group of the thin branch pipes (236).

10. The cleaning device for fine copper conductor processing according to claim 9, characterized in that: A water wheel (238) is fixedly connected to the outer wall of each set of rotating rods (237) near the top, and the top of each set of rotating rods (237) is movably sleeved to the top inner walls of the two bent delivery pipes (234).

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