Agricultural disease and insect pest evaluation equipment

By incorporating cleaning and discharge components into agricultural pest and disease assessment equipment, the problem of pest carcass accumulation is solved, enabling efficient cleaning and accurate assessment of the equipment.

CN223541234UActive Publication Date: 2025-11-14XIANGYUN TECHNOLOGY NANJING CO LTD
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Patent Information

Application Number
CN202422003031.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-19
Publication Date
2025-11-14
Estimated Expiration
2034-08-19

AI Technical Summary

Technical Problem

When existing agricultural pest and disease assessment equipment is used for a long time, pest corpses tend to accumulate on the assessment tray, affecting the accuracy of the assessment. This is especially true in severe weather when the insects cannot be cleaned in time, leading to inaccurate observations.

Method used

A cleaning component and a discharge component were designed. The cleaning component pushes the dead insects to the discharge port, and the discharge component removes them from the equipment, preventing accumulation and improving the accuracy of the assessment.

Benefits of technology

It effectively avoids the accumulation of pest corpses, improves the assessment accuracy of agricultural pest and disease assessment equipment, and ensures that high-definition cameras can clearly observe the types and quantities of pests.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses agricultural pest and disease assessment equipment which comprises an assessment mechanism which is composed of a top cover, a box body, a trap lamp, a collection shell and an assessment disc. The cleaning assembly is arranged between the trap lamp and the evaluation disc, and the bottom of the cleaning assembly is attached to the upper surface of the evaluation disc; a square hole is formed in the bottom of the collecting shell, the discharging assembly is composed of a discharging plate and a pushing part, and the pushing part horizontally moves on the upper surface of the discharging plate in a reciprocating mode through a cleaning assembly. According to the utility model, through the arrangement of the cleaning assembly, the pest corpses accumulated on the evaluation disc can be pushed into the discharging hole, and then the pest corpses are discharged into the evaluation mechanism in cooperation with the discharging assembly, so that the situation that the pest corpses are accumulated, so that subsequent workers can check the types and the number of pests by using a high-definition camera, and the working efficiency is improved can be avoided. Therefore, the evaluation accuracy of the agricultural pest evaluation equipment can be effectively improved.
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Description

Technical Field

[0001] This utility model belongs to the field of smart agriculture technology, and in particular relates to an agricultural pest and disease assessment device. Background Technology

[0002] Smart agriculture is the intelligent economy within agriculture, a concrete manifestation of the intelligent economy in agriculture. Smart agriculture is an important component of the intelligent economy. Furthermore, remotely controlled agricultural pest and disease assessment equipment also falls under the category of smart agriculture equipment, possessing remote assessment capabilities and significantly improving the efficiency of agricultural pest and disease assessment.

[0003] However, existing technologies have some problems: the pest trapping devices, pest killing devices, and high-definition cameras used in agricultural pest assessment equipment on the market tend to accumulate pests on the assessment tray after prolonged use. If there are many pests in the assessment area, they can quickly accumulate on the assessment tray, requiring staff to clean it multiple times. If severe weather occurs, staff may not be able to clean the assessment tray in time, making it difficult to accurately observe the pest species when using the high-definition camera remotely, which can affect the accuracy of the assessment and has certain limitations. Therefore, we propose an agricultural pest assessment device. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide an agricultural pest and disease assessment device. Through the cleaning component, the accumulated insect carcasses on the assessment tray can be pushed into the discharge hole. Then, in conjunction with the discharge component, the insect carcasses are discharged from the assessment mechanism. Therefore, the accumulation of insect carcasses can be avoided, which would affect the subsequent use of a high-definition camera to view the types and quantities of pests. This can effectively improve the assessment accuracy of the agricultural pest and disease assessment device.

[0005] This utility model is implemented as follows: an agricultural pest and disease assessment device, comprising:

[0006] The evaluation mechanism consists of a top cover, a box, an insect-attracting lamp, a collection shell, and an evaluation tray. The top cover is located on the upper surface of the box, and the insect-attracting lamp is located between the top cover and the evaluation tray. The collection shell is located on the upper surface of the box, and the evaluation tray is located inside the upper part of the collection shell.

[0007] A cleaning component is disposed between the insect-attracting lamp and the evaluation tray, with the bottom of the cleaning component attached to the upper surface of the evaluation tray;

[0008] The anti-clogging component is provided in two sets. The upper surface of the evaluation plate is symmetrically provided with discharge holes at both ends, and the two sets of anti-clogging components are rotatably installed inside the two sets of discharge holes respectively.

[0009] The discharge assembly has a square hole at the bottom of the collection shell, and the discharge assembly is located inside the square hole. A guide shell is fixedly installed on the upper surface of the discharge assembly. Both sets of discharge holes are connected to the inside of the guide shell. The discharge assembly consists of a discharge plate and a pushing component. The pushing component moves reciprocally horizontally on the upper surface of the discharge plate through the cleaning component.

[0010] Optionally, the cleaning component includes a protective shell and multiple sets of cleaning rods. The multiple sets of cleaning rods are arranged in a ring at equal intervals on the upper surface of the evaluation tray. The protective shell is fixedly installed at the lower end of the insect-attracting lamp. The bottoms of the multiple sets of cleaning rods are all in contact with the upper surface of the evaluation tray, and the multiple sets of cleaning rods are rotatably connected to the protective shell.

[0011] Optionally, the bottom of the protective shell is provided with a mounting groove, and a remote control motor is provided inside the mounting groove. A drive shaft is fixedly installed at one end of the output shaft of the remote control motor. Multiple sets of sweeping rods are fixedly connected to the drive shaft, and a guide block is fixedly installed at one end of the same side of the multiple sets of sweeping rods. The guide blocks are all inclined on the same side.

[0012] Optionally, the anti-clogging component includes a drive rod, on both sides of which pusher blades are fixedly installed, and the two sets of pusher blades are arranged in a relatively staggered manner. The drive rod is rotatably installed inside the discharge hole. A linkage groove is opened at one end of the discharge hole. Synchronous pulleys are fixedly installed at both ends of one side of the linkage groove, and a synchronous belt is sleeved between the two sets of synchronous pulleys. One end of the drive rod is fixedly connected to one of the sets of synchronous pulleys.

[0013] Optionally, a transmission rod is fixedly installed at the bottom center of the drive shaft, a transmission groove is opened inside the evaluation disk, the transmission rod passes through the upper surface of the evaluation disk to the inside of the transmission groove, a through hole is opened on the upper surface of the evaluation disk, a main gear ring is fixedly installed on the outside of the transmission rod, and the main gear ring is rotatably installed inside the transmission groove, a bevel gear is fixedly installed on one side of another set of synchronous pulleys, and another set of bevel gears is meshed with the bottom of the bevel gears, both sets of bevel gears are rotatably installed inside the linkage groove, and the linkage groove is connected to the transmission groove, a driven gear is fixedly installed at the bottom of the other set of bevel gears, and the driven gear is meshed with the outside of the main gear ring.

[0014] Optionally, the pushing component includes a pushing plate, a toothed plate is fixedly installed on one end of the upper surface of the pushing plate, the toothed plate is slidably installed on the bottom of the evaluation tray, and sliding holes are provided at both ends of the outer side of the guide shell and the collection shell. The sliding holes are correspondingly arranged with the toothed plate. A fan-shaped toothed piece is fixedly installed at the lower end of the transmission rod. The fan-shaped toothed piece is rotatably installed on the bottom of the evaluation tray. The fan-shaped toothed piece is meshed with the toothed plate. A collection groove is provided on the upper surface of the discharge plate, and the pushing plate is movably disposed inside the collection groove.

[0015] Optionally, both ends of the discharge plate are inclined, and both ends of the upper surface of the box are provided with inclined grooves. One side of the inclined groove is set at the same horizontal angle as one end of the discharge plate. The lower ends of both sides of the push plate are fixedly installed with scraping plates. The bottom of the scraping plates is attached to the lower end of the collection groove. The middle of both sides of the push plate is fixedly installed with limiting plates. Both ends of the push plate are fixedly installed with sliding blocks. Both sides of the collection groove are provided with sliding grooves. The sliding blocks are slidably installed in the sliding grooves. One end of the sliding groove is fixedly installed with a return spring. One end of the return spring is fixedly connected to the sliding block.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The cleaning component can push the accumulated insect carcasses on the assessment tray into the discharge hole. Then, in conjunction with the discharge component, the insect carcasses are discharged from the assessment mechanism. Therefore, it can prevent the accumulation of insect carcasses, which would affect the subsequent use of high-definition cameras to check the types and quantities of pests, thereby effectively improving the assessment accuracy of agricultural pest assessment equipment.

[0018] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure provided by this utility model;

[0020] Figure 2 This is a schematic diagram of the box provided by this utility model;

[0021] Figure 3 This is a schematic diagram of the cleaning components provided by this utility model;

[0022] Figure 4 This is a schematic diagram of the evaluation panel provided by this utility model;

[0023] Figure 5 This is a schematic diagram of the exclusion plate provided by this utility model;

[0024] Figure 6 This utility model provides Figure 5 Enlarged diagram of point A.

[0025] In the diagram: 1. Top cover; 2. Box body; 3. Insect-attracting lamp; 4. Collection shell; 5. Cleaning component; 6. Discharge component; 7. Anti-clogging component; 8. Inclined trough; 9. Evaluation tray; 10. Guide shell; 11. Transmission rod; 12. Return spring; 13. Sliding block; 501. Protective shell; 502. Sweeping rod; 503. Guide block; 504. Remote control motor; 505. Drive shaft; 601. Discharge plate; 602. Sector-shaped toothed blade; 603. Toothed plate; 604. Pushing plate; 605. Shovel plate; 606. Limiting plate; 701. Pushing fan blade; 702. Drive rod; 703. Main gear ring; 704. Driven gear; 705. Bevel gear; 706. Synchronous pulley; 707. Synchronous belt. Detailed Implementation

[0026] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0030] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0031] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0032] like Figures 1 to 6As shown in the figure, an agricultural pest and disease assessment device provided by this utility model includes: an assessment mechanism, which consists of a top cover 1, a box 2, an insect-attracting lamp 3, a collection shell 4, and an assessment tray 9. The top cover 1 is disposed on the upper surface of the box 2, and the insect-attracting lamp 3 is disposed between the top cover 1 and the assessment tray 9. The collection shell 4 is disposed on the upper surface of the box 2, and the assessment tray 9 is disposed inside the upper end of the collection shell 4; a cleaning component 5, which is disposed between the insect-attracting lamp 3 and the assessment tray 9, and the bottom of the cleaning component 5 is attached to the upper surface of the assessment tray 9; and an anti-clogging component 7, which consists of two sets. The assessment tray 9 has symmetrical discharge holes at both ends of its upper surface, and the two sets of anti-clogging components 7 are rotatably installed inside the two sets of discharge holes.

[0033] With the design of two sets of anti-clogging components 7 rotatably installed inside the two sets of discharge holes, when there are a lot of insect corpses accumulated on the upper surface of the evaluation tray 9 and the insect corpses are accumulated inside the discharge holes, the anti-clogging components 7 can rotate to speed up the discharge of insect corpses, and at the same time further prevent insect corpses from accumulating inside the discharge holes, so that the insect corpses cannot be effectively cleaned.

[0034] The discharge assembly 6 has a square hole at the bottom of the collection shell 4, and the discharge assembly 6 is located inside the square hole. A guide shell 10 is fixedly installed on the upper surface of the discharge assembly 6. Both sets of discharge holes are connected to the inside of the guide shell 10. The discharge assembly 6 consists of a discharge plate 601 and a pushing component. The pushing component moves horizontally on the upper surface of the discharge plate 601 through the cleaning assembly 5.

[0035] Because the pushing component is designed to reciprocate horizontally on the upper surface of the discharge plate 601 via the cleaning component 5, when the cleaning component 5 is cleaning, the pushing component can continuously push the insect carcasses that fall onto the upper surface of the discharge plate 601 to the outside of the box 2, thereby effectively preventing the insect carcasses from remaining on the agricultural pest assessment equipment.

[0036] Through the design that both sets of discharge holes are connected to the interior of the guide shell 10, from... Figure 3 As can be seen, the insect carcasses that fall inside the discharge hole will fall along the inner wall of the guide shell 10 onto the discharge plate 601, thus allowing for better processing of the insect carcasses.

[0037] Furthermore, the cleaning component 5 includes a protective shell 501 and multiple sets of cleaning rods 502. The multiple sets of cleaning rods 502 are arranged in a ring at equal intervals on the upper surface of the evaluation tray 9. The protective shell 501 is fixedly installed at the lower end of the insect-attracting lamp 3. The bottom of each set of cleaning rods 502 is in contact with the upper surface of the evaluation tray 9, and each set of cleaning rods 502 is rotatably connected to the protective shell 501. The bottom of the protective shell 501 has an installation groove, and a remote control motor 504 is installed inside the installation groove. A drive shaft 505 is fixedly installed at one end of the output shaft of the remote control motor 504. Each set of cleaning rods 502 is fixedly connected to the drive shaft 505, and a guide block 503 is fixedly installed at one end of each set of cleaning rods 502 on the same side. Each set of guide blocks 503 is inclined on the same side.

[0038] With the design of multiple guide blocks 503 all inclined on the same side, the centrifugal force generated by the sweeping rod 502 during rotation will push the insect carcasses to the edge of the upper surface of the evaluation disc 9. Then, the guide blocks 503 can slow down the movement of the insect carcasses by their own inclination, so that the insect carcasses can fall into the discharge hole effectively.

[0039] Furthermore, the anti-clogging component 7 includes a drive rod 702, with pusher blades 701 fixedly installed on both sides of the drive rod 702, and the two sets of pusher blades 701 are arranged in a relatively staggered manner. The drive rod 702 is rotatably installed inside the discharge hole. A linkage groove is opened at one end of the discharge hole. Synchronous pulleys 706 are fixedly installed at both ends of one side of the linkage groove, and a synchronous belt 707 is sleeved between the two sets of synchronous pulleys 706. One end of the drive rod 702 is fixedly connected to one of the sets of synchronous pulleys 706.

[0040] Through the design of two sets of pusher blades 701 arranged in a relatively staggered manner, from Figure 4 As can be seen, the gaps on the two sets of pusher blades 701 can compensate for each other, thus effectively pushing off the pests trapped inside the discharge hole and preventing them from remaining inside.

[0041] Furthermore, a transmission rod 11 is fixedly installed at the bottom center of the drive shaft 505. A transmission groove is opened inside the evaluation disk 9. The transmission rod 11 passes through the upper surface of the evaluation disk 9 to the inside of the transmission groove. A through hole is opened on the upper surface of the evaluation disk 9. A main gear ring 703 is fixedly installed on the outside of the transmission rod 11, and the main gear ring 703 is rotatably installed inside the transmission groove. A bevel gear 705 is fixedly installed on one side of another set of synchronous pulleys 706, and another set of bevel gears 705 is meshed with the bottom of the bevel gear 705. Both sets of bevel gears 705 are rotatably installed inside the linkage groove, and the linkage groove is connected to the transmission groove. A driven gear 704 is fixedly installed at the bottom of the other set of bevel gears 705, and the driven gear 704 is meshed with the outside of the main gear ring 703.

[0042] By using the design of the driven gear 704 meshing with the outer side of the main gear ring 703, the sweeping rod 502 drives the pusher blade 701 to rotate during cleaning through the cooperation of the main gear ring 703, the driven gear 704 and the synchronous wheel 706. This allows for the rational use of electricity and also automatically removes the dead insects inside the discharge hole during cleaning, preventing blockages.

[0043] Furthermore, the pushing component includes a pushing plate 604, with a toothed plate 603 fixedly mounted on one end of its upper surface. The toothed plate 603 is slidably mounted on the bottom of the evaluation tray 9. Sliding holes are provided at both ends of the guide shell 10 and the collection shell 4, corresponding to the toothed plate 603. A sector-shaped toothed piece 602 is fixedly mounted on the lower end of the transmission rod 11, rotatably mounted on the bottom of the evaluation tray 9, and meshing with the toothed plate 603. A collection groove is provided on the upper surface of the discharge plate 601, and the pushing plate 604 is movably disposed inside the collection groove. Both ends of the discharge plate 601 are inclined. The upper surface of the box 2 is provided with inclined grooves 8 at both ends, and one side of the inclined groove 8 is set at the same horizontal angle as one end of the discharge plate 601. The lower ends of both sides of the push plate 604 are fixedly installed with scraping plates 605, and the bottom of the scraping plates 605 is attached to the lower end of the collection tank. The middle of both sides of the push plate 604 is fixedly installed with limiting plates 606. The two ends of the push plate 604 are fixedly installed with sliding blocks 13. The inside of the collection tank is provided with sliding grooves on both sides. The sliding blocks 13 are slidably installed in the sliding grooves, and one end of the sliding groove is fixedly installed with a return spring 12. One end of the return spring 12 is fixedly connected to the sliding block 13.

[0044] With the design of the fan-shaped toothed plate 602 meshing with the toothed plate 603, when the cleaning rod 502 is cleaning, it controls the toothed plate 603 to move. At the same time, relying on the characteristics of the fan-shaped toothed plate 602 and the action of the return spring 12, the push plate 604 can reciprocate inside the collection tank. Therefore, the insect carcasses can be pushed out from both ends of the collection tank. In conjunction with the inclined grooves 8 at both ends of the upper surface of the box 2, the insect carcasses can be effectively prevented from remaining on the agricultural pest assessment equipment.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An agricultural pest and disease assessment device, characterized in that: include: The evaluation mechanism consists of a top cover (1), a box (2), an insect-attracting lamp (3), a collection shell (4), and an evaluation tray (9). The top cover (1) is located on the upper surface of the box (2), and the insect-attracting lamp (3) is located between the top cover (1) and the evaluation tray (9). The collection shell (4) is located on the upper surface of the box (2), and the evaluation tray (9) is located inside the upper part of the collection shell (4). Cleaning component (5), wherein the cleaning component (5) is disposed between the insect-attracting lamp (3) and the evaluation tray (9), and the bottom of the cleaning component (5) is attached to the upper surface of the evaluation tray (9); Anti-clogging component (7), the anti-clogging component (7) is provided in two sets, the evaluation plate (9) has discharge holes symmetrically opened at both ends of the upper surface, and the two sets of anti-clogging components (7) are respectively rotatably installed inside the two sets of discharge holes; The discharge assembly (6) has a square hole at the bottom of the collection shell (4) and the discharge assembly (6) is located inside the square hole. A guide shell (10) is fixedly installed on the upper surface of the discharge assembly (6). Both sets of discharge holes are connected to the inside of the guide shell (10). The discharge assembly (6) consists of a discharge plate (601) and a pushing component. The pushing component moves horizontally on the upper surface of the discharge plate (601) through the cleaning assembly (5).

2. The agricultural pest and disease assessment device according to claim 1, characterized in that: The cleaning component (5) includes a protective shell (501) and multiple sets of cleaning rods (502). The multiple sets of cleaning rods (502) are arranged in a ring at equal intervals on the upper surface of the evaluation plate (9). The protective shell (501) is fixedly installed at the lower end of the insect-attracting lamp (3). The bottom of the multiple sets of cleaning rods (502) is in contact with the upper surface of the evaluation plate (9), and the multiple sets of cleaning rods (502) are rotatably connected to the protective shell (501).

3. The agricultural pest and disease assessment device according to claim 2, characterized in that: The protective shell (501) has an installation groove at the bottom, and a remote control motor (504) is installed inside the installation groove. A drive shaft (505) is fixedly installed at one end of the output shaft of the remote control motor (504). Multiple sets of sweeping rods (502) are fixedly connected to the drive shaft (505), and a guide block (503) is fixedly installed at one end of the same side of the multiple sets of sweeping rods (502). The guide blocks (503) are all inclined on the same side.

4. The agricultural pest and disease assessment device according to claim 3, characterized in that: The anti-clogging component (7) includes a drive rod (702), on both sides of the drive rod (702) are fixedly installed with pusher blades (701), and the two sets of pusher blades (701) are arranged in a relatively staggered manner. The drive rod (702) is rotatably installed inside the discharge hole. A linkage groove is opened at one end of the discharge hole. Synchronous pulleys (706) are fixedly installed at both ends of one side of the linkage groove, and a synchronous belt (707) is sleeved between the two sets of synchronous pulleys (706). One end of the drive rod (702) is fixedly connected to one of the sets of synchronous pulleys (706).

5. The agricultural pest and disease assessment device according to claim 4, characterized in that: A transmission rod (11) is fixedly installed at the bottom center of the drive shaft (505). A transmission groove is opened inside the evaluation disk (9). The transmission rod (11) passes through the upper surface of the evaluation disk (9) to the inside of the transmission groove. A through hole is opened on the upper surface of the evaluation disk (9). A main gear ring (703) is fixedly installed on the outside of the transmission rod (11). The main gear ring (703) is rotatably installed inside the transmission groove. A bevel gear (705) is fixedly installed on one side of another set of synchronous pulleys (706). The bottom of the bevel gear (705) is meshed with another set of bevel gears (705). Both sets of bevel gears (705) are rotatably installed inside the linkage groove. The linkage groove is connected to the transmission groove. A driven gear (704) is fixedly installed at the bottom of the other set of bevel gears (705). The driven gear (704) is meshed with the outside of the main gear ring (703).

6. The agricultural pest and disease assessment device according to claim 5, characterized in that: The pushing component includes a pushing plate (604), a toothed plate (603) is fixedly installed on one end of the upper surface of the pushing plate (604), the toothed plate (603) is slidably installed on the bottom of the evaluation tray (9), and sliding holes are provided at both ends of the outer side of the guide shell (10) and the collection shell (4). The sliding holes are correspondingly set with the toothed plate (603). A fan-shaped toothed piece (602) is fixedly installed at the lower end of the transmission rod (11). The fan-shaped toothed piece (602) is rotatably installed on the bottom of the evaluation tray (9). The fan-shaped toothed piece (602) is meshed with the toothed plate (603). A collection groove is provided on the upper surface of the discharge plate (601), and the pushing plate (604) is movably set inside the collection groove.

7. The agricultural pest and disease assessment device according to claim 6, characterized in that: Both ends of the discharge plate (601) are inclined. Both ends of the upper surface of the box (2) are provided with inclined grooves (8). One side of the inclined groove (8) is set at the same horizontal angle as one end of the discharge plate (601). The lower ends of both sides of the push plate (604) are fixedly installed with scraping plates (605). The bottom of the scraping plate (605) is attached to the lower end of the collection groove. The middle of both sides of the push plate (604) is fixedly installed with limiting plates (606). Both ends of the push plate (604) are fixedly installed with sliding blocks (13). Both sides of the collection groove are provided with sliding grooves. The sliding blocks (13) are slidably installed in the sliding grooves. One end of the sliding groove is fixedly installed with a return spring (12). One end of the return spring (12) is fixedly connected to the sliding block (13).