Screening and cleaning device

Abstract

The invention provides a screening and cleaning device, which belongs to the technical field of aluminum cap production and comprises a drum screen, the drum screen comprises a screen drum, the rolling axis of the screen drum and the horizontal plane are arranged at an included angle, and the screening and cleaning device further comprises a cleaning tank. The cleaning tank is arranged outside the lower end of the screen drum in a sleeving mode and attached to the lower end face of the screen drum, and liquid outlet holes are formed in the bottom wall of the cleaning tank. According to the screening and cleaning device, in the rolling process of the screen drum, waste falls off from the screen drum, and an aluminum cover slides into the cleaning tank. The cleaning liquid is injected into the cleaning tank, cleaning of the aluminum caps is completed through rolling of the screen drum, and therefore the problem that when waste and the aluminum caps are screened through a drum screen, the sorted aluminum caps need to be collected for cleaning due to the fact that the drum screen does not have the cleaning function is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum cover production, and more specifically, relates to a screening and cleaning device. Background Art

[0002] Medicinal aluminum caps are widely used in the sealed packaging of medicines and health products. When stamping and producing aluminum caps, some waste will be generated. The waste and aluminum caps need to be sorted and cleaned. In order to save labor, the waste and aluminum caps are generally screened by a drum screen. The waste and aluminum caps are placed in the screen cylinder of the drum screen. During the rotation of the screen cylinder, the waste falls from the screen cylinder. Since the drum screen does not have a cleaning function, the sorted aluminum caps need to be collected and cleaned, which is a relatively cumbersome process. Summary of the invention

[0003] The object of the present invention is to provide a screening and cleaning device, aiming to solve the problem that when waste materials and aluminum caps are screened by a drum screen, the sorted aluminum caps need to be collected and cleaned because the drum screen has no cleaning function.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a screening and cleaning device, including a drum screen, the drum screen includes a screen cylinder, the rolling axis of the screen cylinder is arranged at an angle with the horizontal plane, and the screening and cleaning device also includes a cleaning tank. The cleaning tank is sleeved outside the lower end of the screen cylinder and fits with the lower end surface of the screen cylinder, and the bottom wall of the cleaning tank is provided with a liquid outlet.

[0005] In a possible implementation, the sieve drum has multiple sieve tubes, and the multiple sieve tubes are evenly arranged around the rotation axis of the sieve drum, the length direction of the sieve tubes is parallel to the rotation axis direction of the sieve drum, the lower end of the sieve tubes is closed, and the side wall of the sieve tubes is provided with a plurality of flushing holes, and the cleaning trough is used to be sleeved outside the lower ends of the multiple sieve tubes and fit with the lower end surface of the sieve tubes, so that the flushing hole is located in the cleaning trough and the flushing hole faces the rotation axis of the sieve drum.

[0006] In a possible implementation, the screening and cleaning device further includes a collecting tank and a base. The notch of the collecting tank faces upward. The base is located in the collecting tank and fixed on the bottom wall of the collecting tank. The drum screen is mounted on the base, and the collecting tank can receive the liquid flowing out of the liquid outlet.

[0007] In a possible implementation, there is a gap between the base and the side wall of the collection tank, and the screening and cleaning device further includes a filter screen. The filter screen is laid in the gap between the base and the side wall of the collection tank and is fixedly connected to the collection tank and the base. The side wall of the collection tank is provided with an outflow hole, and the outflow hole is located below the filter screen.

[0008] In a possible implementation, the screening and cleaning device further includes a main body, a first annular plate and a water inlet pipe. The main body is in a circular ring structure and is coaxially arranged with the rolling axis of the screen drum. The main body is provided with an annular cavity coaxially arranged therewith, and one axial end of the annular cavity is an open end. The main body is fixedly arranged on the base. The first annular plate is coaxially arranged with the main body and can be rotatably inserted into the open end of the annular cavity. One end of the water inlet pipe is fixedly connected to the main body and communicated with the annular cavity. Among them, the screening pipe penetrates the first annular plate so that the upper end of the screening pipe is communicated with the annular cavity, and the screening pipe is fixedly connected to the first annular plate.

[0009] In a possible implementation, the screening and cleaning device further includes a sealing gasket, which matches the first annular plate and is fitted and fixed to an end surface of the first annular plate facing the annular cavity.

[0010] In a possible implementation, the screening and cleaning device further comprises a second annular plate. The second annular plate is slidably sleeved outside the plurality of screening tubes and fits with the end surface of the notch of the cleaning tank, and the second annular plate is detachably connected to the cleaning tank. There is a gap between the side wall of the cleaning tank and the plurality of screening tubes.

[0011] In a possible implementation, the screening and cleaning device further includes a fixing ring and a connecting assembly. The fixing ring is sleeved and fixed outside the cleaning tank. There are multiple connecting assemblies, and the connecting assembly includes a connecting shaft and a connecting bolt. The connecting shaft is parallel to the screening pipe, and the connecting shaft includes a first section with a larger diameter and a second section with a smaller diameter. The end face of the connecting shaft located on the second section is provided with a threaded hole, and the second section is slidably penetrated in the fixing ring. The screw of the connecting bolt is penetrated in the second annular plate and is threadedly connected to the threaded hole, so that the head of the connecting bolt cooperates with the first section to clamp the second annular plate and the fixing ring.

[0012] In a possible implementation, the base has a protruding portion protruding upward, and the screening and cleaning device also includes a fixing member, a connecting member, a hydraulic cylinder, a driving shaft, a guide shaft, a driving motor and two meshing gears. The fixing member is fitted and fixed to the end faces of all the connecting shafts located on the first section. The connecting member is slidably sleeved on all the first sections. The cylinder body of the hydraulic cylinder is fixedly connected to the connecting member, and the piston rod of the hydraulic cylinder can be extended and retracted along the axial direction of the connecting shaft and is fixedly connected to the fixing member. The driving shaft is horizontally arranged and perpendicular to the connecting shaft, and the driving shaft can be rotatably inserted into the protruding portion. There are two guide shafts, and the guide shafts are parallel to the connecting shaft and slidably inserted into the fixing member. One end of the guide shaft is fixedly connected to the connecting member, and the other end is fixedly connected to the driving shaft. The two guide shafts are respectively located on both sides of the protruding portion and are both fitted with the protruding portion. The driving motor is fixed on the base. Two meshing gears are respectively sleeved and fixed on the driving shaft and the output shaft of the driving motor. Wherein, when the second annular plate slides away from the plurality of the screening tubes, the rotation of the driving shaft can make the notch of the cleaning tank face upwards.

[0013] In a possible implementation, the screening and cleaning device further includes a U-shaped member, an air inlet pipe and a purge nozzle. The U-shaped member is downwardly sleeved outside the collection tank and is fixedly connected to the collection tank. The air inlet pipe is vertically arranged, and the air inlet pipe penetrates the top wall of the U-shaped member and is fixedly connected to the U-shaped member. The purge nozzle is fixedly arranged at the lower end of the air inlet pipe. When the rotation of the drive shaft causes the notch of the collection tank to face upward, the collection tank is located directly below the purge nozzle.

[0014] In the embodiment of the present application, the aluminum caps and the waste are placed in the screen drum, and during the rolling of the screen drum, the waste falls from the screen drum, and the aluminum caps slide into the cleaning tank. A cleaning liquid is injected into the cleaning tank, and the aluminum caps are cleaned by the rolling of the screen drum, thereby avoiding the problem that when the waste and aluminum caps are screened by the drum screen, the sorted aluminum caps need to be collected and cleaned because the drum screen does not have a cleaning function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a screening and cleaning device provided in an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the enlarged structure of the local A in FIG. Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the local B in FIG. Figure 4 for Figure 1 Schematic diagram of the enlarged structure of the local C in FIG. Figure 5 A schematic cross-sectional view of a screening and cleaning device provided in an embodiment of the present invention; Figure 6 for Figure 5 Schematic diagram of the enlarged structure of the local D in FIG. Figure 7 for Figure 5 Schematic diagram of the enlarged structure of the local E in FIG. Figure 8 A schematic diagram of the structure of a screen tube in a screen cleaning device provided in an embodiment of the present invention.

[0017] In the figure: 1, drum screen; 11, screen drum; 111, screening tube; 1111, flushing hole; 2, cleaning tank; 21, liquid outlet hole; 3, collecting tank; 31, outflow hole; 4, base; 41, protrusion; 5, filter screen; 6, main body; 61, annular cavity; 7, first annular plate; 8, water inlet pipe; 9, sealing gasket; 10, second annular plate; 110, fixing ring; 120, connecting assembly; 1201, connecting shaft; 12011, first section; 12012, second section; 1202, connecting bolt; 130, fixing piece; 140, connecting piece; 150, hydraulic cylinder; 160, driving shaft; 170, guide shaft; 180, driving motor; 190, gear; 20, U-shaped piece; 210, air inlet pipe; 220, purge nozzle. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] It should be further explained that the drawings and implementation modes of the present invention mainly describe the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0020] When an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0021] The directions or positional relationships indicated by terms such as “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0023] Please also read Figure 1 , Figure 5 and Figure 7 Now, the screening and cleaning device provided by the present invention is described. The screening and cleaning device comprises a drum screen 1, the drum screen 1 comprises a screen cylinder 11, the rolling axis of the screen cylinder 11 is arranged at an angle with the horizontal plane, and the screening and cleaning device further comprises a cleaning tank 2. The cleaning tank 2 is sleeved outside the lower end of the screen cylinder 11 and fits with the lower end surface of the screen cylinder 11, and the bottom wall of the cleaning tank 2 is provided with a liquid outlet 21.

[0024] Compared with the prior art, the screening and cleaning device provided by the present invention places the aluminum caps and waste materials into the screen drum 11. During the rolling of the screen drum 11, the waste materials fall from the screen drum 11, and the aluminum caps slide into the cleaning tank 2. The cleaning liquid is injected into the cleaning tank 2, and the aluminum caps are cleaned by the rolling of the screen drum 11, thereby avoiding the problem that when the waste materials and aluminum caps are screened by the drum screen 1, the sorted aluminum caps need to be collected and cleaned because the drum screen 1 does not have a cleaning function.

[0025] In this embodiment, the liquid outlet 21 is located at the lowest point of the cleaning tank 2 , and the waste liquid for cleaning the aluminum cover flows out from the liquid outlet 21 .

[0026] In some embodiments, see Figure 5 , Figure 7 and Figure 8The sieve drum 11 has a plurality of sieve tubes 111, which are evenly arranged around the rotation axis of the sieve drum 11, and the length direction of the sieve tubes 111 is parallel to the rotation axis direction of the sieve drum 11, the lower end of the sieve tubes 111 is closed, and the side wall of the sieve tubes 111 is provided with a plurality of flushing holes 1111, and the cleaning tank 2 is used to be sleeved outside the lower ends of the plurality of sieve tubes 111 and fit with the lower end surface of the sieve tubes 111, so that the flushing holes 1111 are located in the cleaning tank 2 and the flushing holes 1111 face the rotation axis of the sieve drum 11. The aluminum cover and the waste are placed between the multiple sieve tubes 111. During the rolling of the sieve drum 11, the waste falls from the gaps between the sieve tubes 111, and the aluminum cover slides into the cleaning tank 2. At this time, the aluminum cover is also located in the multiple sieve tubes 111. The cleaning liquid is injected into the sieve tubes 111 through the upper ends of the sieve tubes 111, and the cleaning liquid is sprayed through the flushing holes 1111, thereby flushing and cleaning the aluminum covers between the multiple sieve tubes 111. In this embodiment, the cleaning tank 2 is sleeved outside the lower ends of the multiple sieve tubes 111 and fits with the lower end surface of the sieve tubes 111, that is, it is sleeved outside the lower end of the sieve drum 11 and fits with the lower end surface of the sieve drum 11.

[0027] In some embodiments, see Figure 1 and Figure 5 The screening and cleaning device also includes a collecting tank 3 and a base 4. The notch of the collecting tank 3 faces upward. The base 4 is located in the collecting tank 3 and is fixed on the bottom wall of the collecting tank 3. The drum screen 1 is installed on the base 4, and the collecting tank 3 can receive the liquid flowing out of the liquid outlet 21. The collecting tank 3 can collect the waste material screened by the drum screen 1 and the waste liquid flowing out of the liquid outlet 21.

[0028] In some embodiments, see Figure 1 and Figure 5 , there is a gap between the base 4 and the side wall of the collecting tank 3, and the screening and cleaning device also includes a filter screen 5. The filter screen 5 is laid in the gap between the base 4 and the side wall of the collecting tank 3 and is fixedly connected to the collecting tank 3 and the base 4. Among them, the side wall of the collecting tank 3 is provided with an outflow hole 31, and the outflow hole 31 is located below the filter screen 5. The waste liquid flowing out of the liquid outlet 21 falls after being filtered by the filter screen 5, and then flows out from the outflow hole 31. In this embodiment, the liquid flowing out of the outflow hole 31 can be collected and then processed in the next step.

[0029] In some embodiments, see Figure 1 , Figure 5 and Figure 6The screening and cleaning device also includes a main body 6, a first annular plate 7 and a water inlet pipe 8. The main body 6 is annular in structure and is coaxially arranged with the rolling axis of the screen drum 11. The main body 6 is provided with an annular cavity 61 coaxially arranged therewith, and one axial end of the annular cavity 61 is an open end. The main body 6 is fixedly arranged on the base 4. The first annular plate 7 is coaxially arranged with the main body 6 and can be rotatably penetrated into the open end of the annular cavity 61. One end of the water inlet pipe 8 is fixedly connected to the main body 6 and communicated with the annular cavity 61. Among them, the screen tube 111 penetrates the first annular plate 7 so that the upper end of the screen tube 111 is communicated with the annular cavity 61, and the screen tube 111 is fixedly connected to the first annular plate 7. In this way, the first annular plate 7 can rotate with the screen drum 11. The waste and the aluminum cover are placed between the multiple screen tubes 111 through the main body 6 and the first annular plate 7, and the cleaning liquid is injected into the annular cavity 61 through the water inlet pipe 8, and then the cleaning liquid flows into the multiple screen tubes 111.

[0030] In some embodiments, see Figure 5 and Figure 6 The screening and cleaning device further comprises a sealing gasket 9. The sealing gasket 9 matches the first annular plate 7 and is fixedly attached to the end surface of the first annular plate 7 facing the annular cavity 61. The sealing gasket 9 ensures the sealing between the main body 6 and the first annular plate 7. In this embodiment, the screening pipe 111 penetrates the sealing gasket 9.

[0031] In some embodiments, see Figure 5 , the screening and cleaning device also includes a second annular plate 10. The second annular plate 10 is slidably mounted outside the multiple screening tubes 111 and fits with the end face at the notch of the cleaning tank 2. The second annular plate 10 is detachably connected to the cleaning tank 2. There is a gap between the side wall of the cleaning tank 2 and the multiple screening tubes 111. In this way, when the cleaning is completed, the second annular plate 10 slides away from the multiple screening tubes 111, and the aluminum covers between the multiple screening tubes 111 slide into the cleaning tank 2. The second annular plate 10 blocks the aluminum cover in the cleaning tank 2 from falling out of the cleaning tank 2. Then disconnect the second annular plate 10 from the cleaning tank 2, so as to facilitate the removal of the aluminum cover from the cleaning tank 2.

[0032] In some embodiments, see Figure 2, the screening and cleaning device also includes a fixing ring 110 and a connecting assembly 120. The fixing ring 110 is sleeved and fixed outside the cleaning tank 2. There are multiple connecting assemblies 120, and the connecting assembly 120 includes a connecting shaft 1201 and a connecting bolt 1202. The connecting shaft 1201 is parallel to the screening pipe 111, and the connecting shaft 1201 includes a first section 12011 with a larger diameter and a second section 12012 with a smaller diameter. The end surface of the connecting shaft 1201 located on the second section 12012 is provided with a threaded hole, and the second section 12012 is slidably penetrated in the fixing ring 110. The screw of the connecting bolt 1202 is penetrated in the second annular plate 10 and is threadedly connected in the threaded hole, so that the head of the connecting bolt 1202 cooperates with the first section 12011 to clamp the second annular plate 10 and the fixing ring 110, thereby fixing the second annular plate 10 and the cleaning tank 2 together. When the threaded connection between the screw rod of the connecting bolt 1202 and the threaded hole is disconnected, the connection between the second annular plate 10 and the cleaning tank 2 is also disconnected.

[0033] In some embodiments, see Figure 1 and Figure 3The base 4 has a protruding portion 41 protruding upward, and the screening and cleaning device also includes a fixing member 130, a connecting member 140, a hydraulic cylinder 150, a driving shaft 160, a guide shaft 170, a driving motor 180 and two meshing gears 190. The fixing member 130 is fixedly fitted with the end faces of all the connecting shafts 1201 located on the first section 12011. The connecting member 140 is slidably sleeved on all the first sections 12011. The cylinder body of the hydraulic cylinder 150 is fixedly connected to the connecting member 140, and the piston rod of the hydraulic cylinder 150 can be extended and retracted along the axial direction of the connecting shaft 1201 and is fixedly connected to the fixing member 130. The driving shaft 160 is horizontally arranged and perpendicular to the connecting shaft 1201, and the driving shaft 160 can be rotatably inserted into the protruding portion 41. There are two guide shafts 170, which are parallel to the connecting shaft 1201 and are slidably inserted into the fixing member 130. One end of the guide shaft 170 is fixedly connected to the connecting member 140, and the other end is fixedly connected to the driving shaft 160. The two guide shafts 170 are respectively located on both sides of the protrusion 41 and are both fitted with the protrusion 41. The driving motor 180 is fixed on the base 4. Two meshing gears 190 are respectively sleeved and fixed on the driving shaft 160 and the output shaft of the driving motor 180. Among them, when the second annular plate 10 slides away from the multiple screening tubes 111, the rotation of the driving shaft 160 can make the notch of the cleaning tank 2 upward. The limiting of the two guide shafts 170 by the protrusion 41 can limit the movement of the driving shaft 160 along its axial direction, so that the driving shaft 160 and the protrusion 41 are rotationally connected together. The extension and retraction of the piston rod of the hydraulic cylinder 150 can be converted into the sliding of the connecting shaft 1201 through the fixing part 130, thereby driving the second annular plate 10 to slide away from the multiple screening tubes 111, and then the output shaft of the driving motor 180 drives the driving shaft 160 to rotate through two meshing gears 190 until the notch of the cleaning tank 2 is upward, and then the aluminum cover in the cleaning tank 2 is dried.

[0034] In some embodiments, see Figure 1 and Figure 4 The screening and cleaning device also includes a U-shaped member 20, an air inlet pipe 210 and a purge nozzle 220. The U-shaped member 20 is downwardly sleeved outside the collecting tank 3 and is fixedly connected to the collecting tank 3. The air inlet pipe 210 is vertically arranged, and the air inlet pipe 210 penetrates the top wall of the U-shaped member 20 and is fixedly connected to the U-shaped member 20. The purge nozzle 220 is fixedly arranged at the lower end of the air inlet pipe 210. Among them, when the rotation of the drive shaft 160 makes the notch of the collecting tank 3 face upward, the collecting tank 3 is located directly below the purge nozzle 220. At this time, the connection between the second annular plate 10 and the cleaning tank 2 is disconnected, and the upper end of the air inlet pipe 210 is connected to the air source, and the gas provided by the air source is sprayed downward through the nozzle, thereby accelerating the drying of the aluminum cover in the cleaning tank 2. In this embodiment, the air source can be a hot air blower.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screening and cleaning device, comprising a drum screen, wherein the drum screen comprises a screen drum, characterized in that: The rolling axis of the screen drum is arranged at an angle to the horizontal plane, and the screening and cleaning device further comprises: The cleaning tank is sleeved outside the lower end of the sieve cylinder and fits with the lower end surface of the sieve cylinder. The bottom wall of the cleaning tank is provided with a liquid outlet.

2. The screening and cleaning device according to claim 1, characterized in that: The sieve drum has a plurality of sieve tubes, which are evenly arranged around the rotation axis of the sieve drum, and the length direction of the sieve tubes is parallel to the rotation axis direction of the sieve drum. The lower end of the sieve tubes is closed, and the side wall of the sieve tubes is provided with a plurality of flushing holes. The cleaning trough is used to be sleeved outside the lower ends of the plurality of sieve tubes and fit with the lower end surface of the sieve tubes, so that the flushing holes are located in the cleaning trough and the flushing holes face the rotation axis of the sieve drum.

3. The screening and cleaning device according to claim 2, characterized in that: Also includes: A collecting trough with the notch facing upward; A base, located in the collecting tank and fixed on the bottom wall of the collecting tank; Wherein, the drum screen is installed on the base, and the collecting tank can receive the liquid flowing out of the liquid outlet.

4. The screening and cleaning device according to claim 3, characterized in that: There is a gap between the base and the side wall of the collecting tank, and the screening and cleaning device also includes: A filter screen is laid in the gap between the base and the side wall of the collecting tank and is fixedly connected to both the collecting tank and the base; Wherein, the side wall of the collecting tank is provided with an outflow hole, and the outflow hole is located below the filter screen.

5. The screening and cleaning device according to claim 3, characterized in that: Also includes: The main body is in a circular ring structure and is coaxially arranged with the rolling axis of the screen drum. The main body is provided with an annular cavity coaxially arranged with the main body, one axial end of the annular cavity is an open end, and the main body is fixed on the base; A first annular plate is coaxially arranged with the main body and rotatably penetrates into the opening end of the annular cavity; A water inlet pipe, one end of which is fixedly connected to the main body and communicated with the annular cavity; The sieve pipe penetrates the first annular plate so that the upper end of the sieve pipe is in communication with the annular cavity, and the sieve pipe is fixedly connected to the first annular plate.

6. The screening and cleaning device according to claim 5, characterized in that: Also includes: The sealing gasket matches the first annular plate and is fitted and fixed to the end surface of the first annular plate facing the annular cavity.

7. The screening and cleaning device according to claim 3, characterized in that: Also includes: A second annular plate is slidably sleeved outside the plurality of sieve pipes and is in contact with the end surface of the cleaning tank notch, and the second annular plate is detachably connected to the cleaning tank; Wherein, there is a gap between the side wall of the cleaning tank and the plurality of sieve pipes.

8. The screening and cleaning device according to claim 7, characterized in that: Also includes: A fixing ring, sleeved and fixed outside the cleaning tank; There are multiple connecting components, and the connecting components include a connecting shaft and a connecting bolt; the connecting shaft is parallel to the screening pipe, and includes a first section with a larger diameter and a second section with a smaller diameter, and the end face of the connecting shaft located on the second section is provided with a threaded hole, and the second section is slidably penetrated in the fixing ring; the screw of the connecting bolt is penetrated in the second annular plate and is threadedly connected to the threaded hole, so that the head of the connecting bolt cooperates with the first section to clamp the second annular plate and the fixing ring.

9. The screening and cleaning device according to claim 8, characterized in that: The base has a protruding portion protruding upward, and the screening and cleaning device further comprises: A fixing member, which is fitted and fixed to the end surfaces of all the connecting shafts located on the first section; A connecting member, slidably mounted on all of the first sections; A hydraulic cylinder, a cylinder body of which is fixedly connected to the connecting piece, a piston rod of which can be extended and retracted along the axial direction of the connecting shaft and is fixedly connected to the fixing piece; A driving shaft is arranged horizontally and perpendicular to the connecting shaft, and the driving shaft can be rotatably inserted into the protruding portion; There are two guide shafts, the guide shafts are parallel to the connecting shaft and are slidably arranged in the fixing member, one end of the guide shaft is fixedly connected to the connecting member, and the other end is fixedly connected to the driving shaft, and the two guide shafts are respectively located on both sides of the protruding portion and are both in contact with the protruding portion; A driving motor is fixed on the base; Two meshing gears are respectively sleeved and fixed on the driving shaft and the output shaft of the driving motor; Wherein, when the second annular plate slides away from the plurality of the screening tubes, the rotation of the driving shaft can make the notch of the cleaning tank face upwards.

10. The screening and cleaning device according to claim 9, characterized in that: Also includes: A U-shaped member, which is sleeved downwardly outside the collecting tank and is fixedly connected to the collecting tank; An air inlet pipe is vertically arranged, the air inlet pipe penetrates the top wall of the U-shaped member and is fixedly connected to the U-shaped member; A purge nozzle is fixedly arranged at the lower end of the air inlet pipe; When the driving shaft rotates so that the notch of the collecting tank faces upward, the collecting tank is located directly below the purge nozzle.

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