A reject mechanism for a capsule polishing machine

Abstract

The utility model provides a kind of reject mechanism for capsule polishing machine, including main body seat, core, mounting seat, cylindrical barrel, collection box and regulating valve;When using, air injection equipment injects air into air injection cavity by regulating valve;After gas enters air injection cavity, it flows upwards by open end, passes through middle through-hole, cylindrical barrel, enters collection box, and is discharged from the long strip gas outlet opening on collection box;This continuous gas movement path forms stable upward airflow, so that the quality lighter empty capsule or underfilled capsule is sucked into collection box upwards, thereby completing the elimination of unqualified capsule.The reject mechanism of the utility model, the open end of air injection cavity is annular channel structure, in the air intake process, annular channel makes gas can be evenly distributed, ensure the air intake amount of each position is consistent, to realize overall air intake uniform, avoid the problem that empty capsule is missed due to local airflow is too weak, or local airflow is too strong and misabsorbs qualified capsule.

Description

Technical Field

[0001] This utility model relates to the field of capsule polishing machine technology, and specifically to a waste rejection mechanism for a capsule polishing machine. Background Technology

[0002] Capsules are a common type of oral solid dosage form, usually made of materials such as gelatin or cellulose, used to encapsulate active ingredients such as drug powders, granules, or microcapsules to facilitate administration, mask unpleasant tastes, and improve drug stability.

[0003] During capsule manufacturing, a small amount of loose powder often adheres to the surface after filling. Simultaneously, due to mold separation or capsule shell forming processes, the edges or joints of some capsules may be rough, affecting their appearance and user experience. Therefore, a dedicated capsule polishing machine is needed to remove surface powder, improve surface smoothness, and enhance overall product quality. Furthermore, empty or underfilled capsules may be generated during the filling process; these must be separated using a rejection mechanism during the same polishing process to ensure that the finished product meets formulation specifications. The rejection mechanism works by utilizing the difference between pneumatics and gravity for sorting. Specifically, gas is injected into the mechanism; qualified capsules fall smoothly through the outlet under gravity, while lighter empty or underfilled capsules are drawn into a waste collection box by the airflow. The existing rejection mechanism introduces air into the interior through three air injection holes. This structure has the problem of uneven air distribution in actual operation. Uneven airflow may lead to insufficient air pressure in some areas, causing some empty capsules to be mixed into qualified products without being effectively removed. Conversely, if the local airflow is too strong, some qualified capsules may be mistakenly sucked into the waste box, resulting in product waste.

[0004] Therefore, how to design a waste removal mechanism for capsule polishing machines that provides uniform airflow distribution and precise waste removal is a technical problem that has not yet been solved in the existing technology. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the technical defect of uneven air intake in the existing waste removal mechanism, which leads to insufficient removal accuracy, and thus provide a waste removal mechanism for capsule polishing machine with uniform air intake distribution and accurate removal.

[0006] Therefore, this utility model provides a waste rejection mechanism for a capsule polishing machine, comprising: The main body has a mounting cavity formed in the middle that extends through both ends, and an air injection hole communicating with the mounting cavity is opened on one side; The core is hollow and open at both ends. The top is installed into the mounting cavity of the main body, and the bottom is adapted to connect to the feed pipe of the polishing machine. When the top of the core is installed into the mounting cavity, the outer wall of the top of the core surrounds the inner wall of the mounting cavity to form an air injection cavity. The bottom of the air injection cavity is closed and the top is open, and it communicates with the air injection through hole. The mounting base is inserted into the top of the main body and has a central through hole formed in the middle that communicates with the air injection chamber. A cylindrical tube, hollow and open at both ends, is inserted into the central through hole of the mounting base at the bottom, and the inner cavity communicates with the central through hole; The collection box is detachably installed on the top of the main body and covers the outside of the cylindrical tube, with several long air outlets through the outer wall; The regulating valve has one end fixedly installed on the outer wall of the main body and connected to the air injection port, and the other end is suitable for connecting an external air injection device; the regulating valve is used to regulate the amount of air injected into the air injection port.

[0007] As a preferred embodiment, the open end of the gas injection chamber forms an annular gas outlet channel, which is formed by the combination of the top outer wall of the core and the inner wall of the mounting cavity; the gas in the gas injection chamber can flow upward through the annular gas outlet channel, the central through hole, and the inner cavity of the cylindrical tube, and then flow out from the elongated gas outlet opening.

[0008] As a preferred embodiment, a first vertical step mounting surface is formed on the inner wall of the mounting cavity located below the gas injection cavity; a second vertical step mounting surface is formed on the outer wall of the core at a position opposite to the first vertical step mounting surface; after the core is installed into the mounting cavity, the second vertical step mounting surface can be sealed with the first vertical step mounting surface, thereby sealing the bottom of the gas injection cavity.

[0009] As a preferred embodiment, the first vertical step mounting surface includes a higher annular sealing surface and a lower annular mounting surface; the inner diameter of the annular sealing surface is smaller than the inner diameter of the annular mounting surface. A first annular mounting groove is formed on the annular sealing surface; a second annular mounting groove is formed on the second vertical step mounting surface at the position opposite to the first annular mounting groove. It also includes an annular sealing ring, which is installed between the first annular mounting groove and the second annular mounting groove.

[0010] As a preferred embodiment, the annular mounting surface is formed with an internal thread; the second vertical step mounting surface is formed with an external thread at a position opposite to the internal thread; the core and the mounting cavity are connected together by threads.

[0011] As a preferred embodiment, the top surface of the mounting base is formed with a collection ramp, which is adapted to guide the collection of the capsule.

[0012] As a preferred embodiment, an annular inner flange is formed on the inner wall of the central through hole of the mounting base near the bottom. After the bottom of the cylindrical tube is inserted into the central through hole, it is in sealing contact with the annular inner flange. and / or; The top of the main body is formed with an annular insertion flange, and the central through hole of the mounting base can be sealed and inserted with the annular insertion flange, thereby inserting and installing the mounting base on the top of the main body.

[0013] As a preferred embodiment, a guide is fixedly installed on the inner top wall of the collection box at a position opposite to the middle of the cylindrical tube. The outer circumferential wall of the guide is formed with an arc-shaped guide surface, which is suitable for guiding the capsule smoothly into the collection box.

[0014] As a preferred embodiment, the collection box is equipped with an opening and closing door at the lower end of the collection slope, and a lifting handle is fixedly installed on the outer wall of the opening and closing door.

[0015] As a preferred embodiment, the collection box is detachably mounted on top of the main body via a detachable mounting structure; The detachable installation structure includes: There are two latches, which are fixedly installed on the outer walls of the two sides of the main body. There are two latch switches, each rotatably mounted on one of the two latches; There are two locking rings, which are movably mounted on the two locking switches respectively; There are two locking hooks, which are respectively fixedly installed on the outer walls of the collection box on both sides opposite to the locking buckle; When the collection box is installed on the top of the main body, the locking ring is rotated upward to connect with the locking hook, and then the locking switch is pressed downward to drive the locking ring to be fastened to the locking hook, thereby detachably installing the collection box on the top of the main body.

[0016] The technical solution provided by this utility model has the following advantages: This utility model relates to a waste removal mechanism for a capsule polishing machine, comprising a main body, a core, a mounting base, a cylindrical tube, a collection box, and a regulating valve. The main body has a mounting cavity formed in the middle, extending through both ends, and an air injection port communicating with the mounting cavity on one side. The core is hollow with openings at both ends; its top is installed into the mounting cavity of the main body, and its bottom is suitable for connection to the feed pipe of the polishing machine. When the top of the core is installed into the mounting cavity, the outer wall of the top of the core surrounds the inner wall of the mounting cavity to form an air injection chamber. The bottom of the air injection chamber is closed, and the top is open, communicating with the air injection port. The mounting base is connected to the top of the main body and has a central through hole that communicates with the air injection chamber. The cylindrical tube is hollow and open at both ends. It is inserted into the central through hole of the mounting base and its inner cavity communicates with the central through hole. The collection box is detachably installed on the top of the main body and covers the outside of the cylindrical tube. Several long air outlets are opened through the outer wall. One end of the regulating valve is fixedly installed on the outer wall of the main body and communicates with the air injection through hole. The other end is suitable for connecting an external air injection device. The regulating valve is used to regulate the amount of air injected into the air injection through hole.

[0017] When rejecting defective capsules, the gas injection device injects air into the injection chamber through a regulating valve. After entering the injection chamber, the gas flows upward through the open end at the top, passing sequentially through the central through-hole of the mounting base and the cylindrical tube, finally entering the collection box and exiting from the elongated air outlet on the collection box. This continuous gas movement path forms a stable upward airflow, causing lighter empty capsules or incompletely filled capsules to be sucked upward into the collection box, thus completing the rejection of defective capsules. Compared to existing rejection mechanisms that suffer from uneven air distribution due to three injection holes, this invention's rejection mechanism for capsule polishing machines features an annular channel structure at the open end of the injection chamber. During the air intake process, the annular channel ensures uniform gas distribution, guaranteeing consistent air intake at all locations. This achieves overall uniform air intake, preventing the missed rejection of empty capsules due to weak local airflow or the accidental intake of qualified capsules due to excessive local airflow, significantly improving rejection accuracy and reliability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the prior art or specific embodiments of this utility model, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the overall structure of the waste removal mechanism for a capsule polishing machine according to this utility model.

[0020] Figure 2 yes Figure 1 Another stereoscopic view.

[0021] Figure 3 yes Figure 1 A sectional view.

[0022] Figure 4 yes Figure 3 Enlarged structural diagram of section B.

[0023] Figure 5 yes Figure 1 Another sectional view.

[0024] Figure 6 yes Figure 2 Enlarged structural diagram of part A.

[0025] Reference numerals: 1. Main body; 11. Mounting cavity; 12. Air injection through hole; 13. First vertical step mounting surface; 14. Second vertical step mounting surface; 15. Annular sealing surface; 16. Annular sealing ring; 17. Annular mounting surface; 2. Core; 21. Air injection cavity; 22. Annular air outlet channel; 3. Mounting seat; 31. Central through hole; 32. Collection slope; 33. Annular inner flange; 34. Annular insertion flange; 4. Cylindrical tube; 5. Collection box; 51. Long strip air outlet opening; 52. Guide; 53. Arc-shaped guide surface; 54. Opening and closing door; 55. Lifting handle; 6. Adjusting valve; 7. Lock; 71. Lock switch; 72. Locking ring; 73. Locking hook. Detailed Implementation

[0026] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0027] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0028] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0029] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0030] This embodiment provides a waste rejection mechanism for a capsule polishing machine, such as... Figure 1-4 As shown, it includes: a main body 1, a core 2, a mounting base 3, a cylindrical tube 4, a collection box 5, and a regulating valve 6; wherein, the main body 1 has a mounting cavity 11 formed in the middle of its middle, extending through both ends, and an air injection through hole 12 communicating with the mounting cavity 11 is opened on one side; the core 2 is hollow and open at both ends, with its top installed into the mounting cavity 11 of the main body 1, and its bottom adapted to connect with the feed pipe of the polishing machine; when the top of the core 2 is installed into the mounting cavity 11, the outer wall of the top of the core 2 surrounds the inner wall of the mounting cavity 11 to form an air injection cavity 21, the bottom of the air injection cavity 21 is closed, the top is open, and it communicates with the air injection through hole 12; the mounting base The bottom is inserted and installed on the top of the main body 1, and a central through hole 31 is formed in the middle, which communicates with the air injection chamber 21; the cylindrical cylinder 4 is hollow and open at both ends, and is inserted and installed in the central through hole 31 of the mounting base 3, with the inner cavity communicating with the central through hole 31; the collection box 5 is detachably installed on the top of the main body 1 and covers the outside of the cylindrical cylinder 4, with several long air outlet openings 51 through the outer wall; one end of the regulating valve 6 is fixedly installed on the outer wall of the main body 1 and communicates with the air injection through hole 12, and the other end is suitable for connecting an external air injection device; the regulating valve 6 is used to regulate the amount of air injected into the air injection through hole 12.

[0031] When rejecting defective capsules, the gas injection device injects air into the gas injection chamber 21 through the regulating valve 6. After entering the gas injection chamber 21, the gas flows upward through the open end at the top, passing sequentially through the central through hole 31 of the mounting base 3, the cylindrical tube 4, and finally into the collection box 5, and is discharged from the elongated air outlet 51 on the collection box 5. This continuous gas movement path forms a stable upward airflow, causing lighter empty capsules or incompletely filled capsules to be sucked upward into the collection box 5, thus completing the rejection of defective capsules. Compared with the existing rejection mechanism that injects air through three gas injection holes, which has the problem of uneven air distribution, the rejection mechanism of the capsule polishing machine in this embodiment has an annular channel structure at the open end of the gas injection chamber 21. During the air intake process, the annular channel allows the gas to be evenly distributed, ensuring that the air intake volume at each position is consistent, thereby achieving uniform overall air intake and avoiding the problem of empty capsules being missed due to weak local airflow or qualified capsules being accidentally sucked in due to strong local airflow, significantly improving the rejection accuracy and reliability.

[0032] like Figure 4 As shown, the open end of the gas injection chamber 21 forms an annular gas outlet channel 22, which is formed by the combination of the top outer wall of the core 2 and the inner wall of the mounting cavity 11. The gas in the gas injection chamber 21 can flow upward through the annular gas outlet channel 22, the central through hole 31, and the inner cavity of the cylindrical tube 4, and then out through the elongated gas outlet 51. The annular gas outlet channel 22 enables the gas to be evenly distributed, ensuring that the air intake at each position is consistent, thereby achieving uniform overall air intake and avoiding the problem of empty capsules being missed due to insufficient local airflow or qualified capsules being accidentally aspirated due to excessive local airflow, significantly improving the rejection accuracy and reliability.

[0033] A first vertical step mounting surface 13 is formed on the inner wall of the mounting cavity 11 located below the air injection cavity 21; a second vertical step mounting surface 14 is formed on the outer wall of the core 2 at a position opposite to the first vertical step mounting surface 13; after the core 2 is installed into the mounting cavity 11, the second vertical step mounting surface 14 can be sealed with the first vertical step mounting surface 13, thereby sealing the bottom of the air injection cavity 21.

[0034] The first vertical step mounting surface 13 includes a higher annular sealing surface 15 and a lower annular mounting surface 17; the inner diameter of the annular sealing surface 15 is smaller than the inner diameter of the annular mounting surface 17; a first annular mounting groove is formed on the annular sealing surface 15; a second annular mounting groove is formed on the second vertical step mounting surface 14 at a position opposite to the first annular mounting groove; it also includes an annular sealing ring 16, which is installed between the first annular mounting groove and the second annular mounting groove. The annular sealing ring 16 is used to further seal the bottom of the air injection chamber 21 to prevent air leakage.

[0035] An internal thread is formed on the annular mounting surface 17; an external thread is formed on the second vertical step mounting surface 14 at the position opposite to the internal thread; the core 2 and the mounting cavity 11 are connected together by threads.

[0036] like Figure 5 As shown, the top surface of the mounting base 3 is formed with a collection ramp 32, which is adapted to guide the collection of capsules. When an empty capsule is sucked into the collection box 5 and falls onto the collection ramp 32 of the mounting base 3, the ramp naturally guides the capsule to slide and gather on the same side due to its slope, thereby facilitating centralized collection and cleaning.

[0037] An annular inner flange 33 is formed on the inner wall near the bottom of the central through hole 31 of the mounting base 3. After the bottom of the cylindrical tube 4 is inserted into the central through hole 31, it is in sealing contact with the annular inner flange 33. An annular insertion flange 34 is formed on the top of the main body 1. The central through hole 31 of the mounting base 3 can be sealed and inserted into the annular insertion flange 34, thereby inserting the mounting base 3 into the top of the main body 1.

[0038] like Figure 5 As shown, a guide 52 is fixedly installed on the inner top wall of the collection box 5 at a position vertically opposite to the middle of the cylindrical tube 4. An arc-shaped guide surface 53 is formed on the circumferential outer wall of the guide 52. This arc-shaped guide surface 53 is suitable for guiding the capsule smoothly into the collection box 5. When the empty capsule is drawn vertically upward from the cylindrical tube 4 by a high-speed airflow, the arc-shaped guide surface 53 can catch and guide the capsule, causing its movement direction to naturally change from vertically upward to biased towards the interior space of the collection box 5, ensuring that the capsule is guided into the collection box 5, rather than falling back or stagnating at the entrance.

[0039] The collection box 5 has an opening and closing door 54 installed at the lower end of the collection slope 32, and a lifting handle 55 is fixedly installed on the outer wall of the opening and closing door 54. When it is necessary to clean up defective capsules, the opening and closing door 54 can be opened by pulling the lifting handle 55 upwards; at this time, the capsules accumulated on the collection slope 32 can slide out naturally along the slope, making it easy to collect and clean them. After cleaning is completed, the opening and closing door 54 is closed downwards, so that the collection box 5 can return to the closed state and continue to collect subsequent rejected capsules.

[0040] like Figure 2 , 6As shown, the collection box 5 is detachably mounted on the top of the main body 1 via a detachable mounting structure. The detachable mounting structure includes a latch 7, a latch switch 71, a locking ring 72, and a locking hook 73. There are two latches 7, fixedly mounted on the outer walls of both sides of the main body 1. There are two latch switches 71, rotatably mounted on the two latches 7. There are two locking rings 72, movably mounted on the two latch switches 71. There are two locking hooks 73, fixedly mounted on the outer walls of the collection box 5 opposite to the latches 7. When the collection box 5 is mounted on the top of the main body 1, the locking ring 72 is rotated upwards to connect with the locking hook 73, and then the latch switch 71 is pressed downwards to tighten the locking ring 72 and the locking hook 73, thereby detachably mounting the collection box 5 on the top of the main body 1.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. A waste rejection mechanism for a capsule polishing machine, characterized in that, include: The main body (1) has a mounting cavity (11) formed in the middle that extends through both ends, and an air injection hole (12) connected to the mounting cavity (11) is provided on one side. The core (2) is hollow and open at both ends. The top is installed into the mounting cavity (11) of the main body (1), and the bottom is adapted to be connected to the feed pipe of the polishing machine. When the top of the core (2) is installed into the mounting cavity (11), the outer wall of the top of the core (2) surrounds the inner wall of the mounting cavity (11) to form an air injection cavity (21). The bottom of the air injection cavity (21) is closed and the top is open, and it communicates with the air injection through hole (12). Mounting base (3) is inserted into the top of the main body base (1) at the bottom, and has a central through hole (31) formed in the middle that communicates with the air injection chamber (21). A cylindrical tube (4) is hollow and open at both ends. The bottom is inserted into the central through hole (31) of the mounting base (3), and the inner cavity is connected to the central through hole (31). The collection box (5) is detachably installed on the top of the main body (1) and covers the outside of the cylindrical tube (4). Several long air outlets (51) are opened through the outer wall. The regulating valve (6) is fixedly installed on the outer wall of the main body (1) and connected to the air injection hole (12), and the other end is suitable for connecting an external air injection device; the regulating valve (6) is used to regulate the amount of air injected into the air injection hole (12).

2. The waste rejection mechanism for a capsule polishing machine according to claim 1, characterized in that: The open end of the gas injection chamber (21) forms an annular gas outlet channel (22), which is formed by the combination of the top outer wall of the core (2) and the inner wall of the mounting cavity (11); the gas in the gas injection chamber (21) can flow upward through the annular gas outlet channel (22), the central through hole (31), and the inner cavity of the cylindrical tube (4) and then out through the elongated gas outlet (51).

3. The waste rejection mechanism for a capsule polishing machine according to claim 2, characterized in that: A first vertical step mounting surface (13) is formed on the inner wall of the mounting cavity (11) below the air injection cavity (21); a second vertical step mounting surface (14) is formed on the outer wall of the core (2) opposite to the first vertical step mounting surface (13); after the core (2) is installed into the mounting cavity (11), the second vertical step mounting surface (14) can be sealed with the first vertical step mounting surface (13), thereby sealing the bottom of the air injection cavity (21).

4. The waste rejection mechanism for a capsule polishing machine according to claim 3, characterized in that: The first vertical step mounting surface (13) includes a higher annular sealing surface (15) and a lower annular mounting surface (17); the inner diameter of the annular sealing surface (15) is smaller than the inner diameter of the annular mounting surface (17); A first annular mounting groove is formed on the annular sealing surface (15); a second annular mounting groove is formed on the second vertical step mounting surface (14) at the position opposite to the first annular mounting groove. It also includes an annular sealing ring (16), which is installed between the first annular mounting groove and the second annular mounting groove.

5. The waste rejection mechanism for a capsule polishing machine according to claim 4, characterized in that: The annular mounting surface (17) is formed with an internal thread; the second vertical step mounting surface (14) is formed with an external thread at the position opposite to the internal thread; the core (2) and the mounting cavity (11) are connected together by threads.

6. The waste rejection mechanism for a capsule polishing machine according to claim 1, characterized in that: The top surface of the mounting base (3) is formed with a collection ramp (32), which is adapted to guide the collection of the capsule.

7. The waste rejection mechanism for a capsule polishing machine according to claim 6, characterized in that: An annular inner flange (33) is formed on the inner wall near the bottom of the central through hole (31) of the mounting base (3). After the bottom of the cylindrical tube (4) is inserted into the central through hole (31), it is in sealed contact with the annular inner flange (33). and / or; The top of the main body (1) is formed with an annular insertion flange (34), and the central through hole (31) of the mounting base (3) can be sealed and inserted with the annular insertion flange (34) so ​​that the mounting base (3) can be inserted and installed on the top of the main body (1).

8. The waste rejection mechanism for a capsule polishing machine according to claim 6, characterized in that: On the inner top wall of the collection box (5), a guide (52) is fixedly installed at a position opposite to the middle of the cylindrical tube (4). An arc-shaped guide surface (53) is formed on the circumferential outer wall of the guide (52). The arc-shaped guide surface (53) is suitable for guiding the capsule smoothly into the collection box (5).

9. The waste rejection mechanism for a capsule polishing machine according to claim 6, characterized in that: The collection box (5) is equipped with an opening and closing door (54) at the lower end of the collection slope (32), and a lifting handle (55) is fixedly installed on the outer side wall of the opening and closing door (54).

10. The waste rejection mechanism for a capsule polishing machine according to claim 1, characterized in that: The collection box (5) is detachably mounted on the top of the main body (1) via a detachable mounting structure; The detachable installation structure includes: There are two latches (7), which are fixedly installed on the outer walls of the two sides of the main body (1); There are two latch switches (71), which are rotatably mounted on the two latches (7); There are two locking rings (72), which are movably mounted on the two locking switches (71) respectively; There are two locking hooks (73), which are respectively fixedly installed on the outer walls of the collection box (5) on both sides opposite to the locking buckle (7); When the collection box (5) is installed on the top of the main body (1), the locking ring (72) is rotated upward to connect with the locking hook (73), and then the locking switch (71) is pressed downward to drive the locking ring (72) to be fastened to the locking hook (73), thereby detachably installing the collection box (5) on the top of the main body (1).

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