An automatic water spraying device for crayfish

Abstract

This utility model discloses an automatic spraying device for crayfish, solving the problems of time-consuming and labor-intensive manual spraying of crayfish baskets and poor spraying effect in existing technologies. This utility model includes several interconnected tracks, a power trolley mounted on and moving along the tracks, a spraying mechanism mounted on the power trolley and connected to a water inlet hose, and a connecting mechanism between adjacent tracks. The assembly mechanism includes a first connecting rod and a clearance hole on the track, and a nut threaded onto the first connecting rod. When assembling two adjacent tracks, the first connecting rod on one track is located within the clearance hole on the other track and secured by the nut. The tracks, power trolley, and spraying mechanism work together to enable the spraying mechanism to reciprocate spraying the crayfish baskets, reducing the labor intensity of workers and improving the spraying effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of crayfish temporary storage spraying device, specifically relating to an automatic crayfish spraying water device. Background Technology

[0002] The crayfish trading center (collection point) has a large daily intake, but the overall automation level of its operation is obviously insufficient. Under the traditional operation mode of manual sorting and packaging, the operation time window is long, which leads to the accumulation and storage of crayfish for a long time. This aggravates the physiological damage of crayfish due to lack of oxygen and stress response, and at the same time, the survival rate during transportation drops significantly, which seriously affects the quality of crayfish products.

[0003] Currently, crayfish trading centers mainly maintain the moisture of the crayfish cages and gills by manually watering them at regular intervals or using drip irrigation devices. However, these methods are time-consuming and labor-intensive when cooling and spraying the crayfish cages, and the spraying effect is relatively poor. Summary of the Invention

[0004] This utility model provides an automatic water spraying device for crayfish, which at least solves some of the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An automatic crayfish spraying device includes several interchangeable tracks, a power trolley mounted on and moving along the tracks, a spraying mechanism mounted on the power trolley and connected to a water inlet hose, and a connecting mechanism between two adjacent tracks. The assembly mechanism includes a first connecting rod and a clearance hole on the track, and a nut threaded onto the first connecting rod. When two adjacent tracks are assembled, the first connecting rod on one track is located in the clearance hole on the other track and is fixed by the nut.

[0007] Furthermore, the track includes a first guide rail and a second guide rail that are arranged in parallel and offset, and a second connecting rod disposed between the first guide rail and the second guide rail; the first connecting rod is disposed on the first guide rail, a clearance hole is opened on the second guide rail, and the power trolley is installed between the first guide rail and the second guide rail.

[0008] Furthermore, the first and second guide rails are equipped with anti-slip pads to increase friction.

[0009] Furthermore, suction cups are provided at the bottom of the first and second guide rails.

[0010] Furthermore, the spraying mechanism includes an installation box mounted on a power trolley, a transition pipe located inside the installation box and connected to the water inlet hose, a chiller and a booster pump located on the transition pipe and inside the installation box, a spraying device mounted on the installation box and connected to the transition pipe, and a microcontroller located inside the installation box and connected to the power trolley, the chiller, the booster pump and the spraying device respectively.

[0011] Furthermore, the spraying device includes a first spray pipe connected to the transition pipe, a second spray pipe disposed on the first spray pipe and perpendicular to the first spray pipe, a plurality of nozzles spaced apart on the first spray pipe and the second spray pipe, and a solenoid valve disposed on the first spray pipe and connected to the microcontroller.

[0012] Furthermore, the mounting box includes a box body mounted on a power trolley, a first partition and a second partition mounted inside the box body, a rotating door mounted on the box body, and a sealing mechanism between the box body and the door; a chiller is mounted on the first partition, and a booster pump is mounted on the second partition.

[0013] Furthermore, the sealing mechanism includes a limiting groove formed on the housing, a sealing groove provided in the limiting groove, a sealing ring provided in the sealing groove, and a limiting protrusion provided on the housing door and adapted to the limiting groove; the limiting protrusion is located in the limiting groove and is tightly attached to the sealing ring.

[0014] Furthermore, the box body is provided with an installation groove, and a magnet is provided in the installation groove. The box door is fixed to the box body by the magnet.

[0015] Furthermore, a limit switch is provided at each end of the track. The power trolley includes a mounting base, a drive motor located at the bottom of the mounting base, a reducer located at the bottom of the mounting base and connected to the output end of the drive motor, a drive shaft located at the bottom of the mounting base and connected to the output end of the bottom of the mounting base, and two rollers located at both ends of the drive shaft and adapted to the track.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model has a simple structure, a scientific and reasonable design, and is easy to use. The utility model uses a power trolley to drive the spraying mechanism to move back and forth on the track, so that the spraying mechanism can move around the shrimp frame. The spraying mechanism sprays water from the water inlet hose into the shrimp frame, thereby reducing the labor intensity of workers. At the same time, it can also continuously spray the shrimp frame, so that the crayfish in the shrimp frame are in a humid environment, thereby reducing the mortality rate of crayfish during storage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the assembly of the track of this utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of the first guide rail of this utility model.

[0021] Figure 4 This is a cross-sectional view of the second guide rail of this utility model.

[0022] Figure 5 This is a schematic diagram of the housing of this utility model.

[0023] Figure 6 for Figure 5 A schematic diagram of the cross section of AA.

[0024] Figure 7 This is a schematic diagram of the door of this utility model.

[0025] Figure 8 This is a schematic diagram of the power vehicle of this utility model.

[0026] Figure 9 This is a control block diagram of the present invention.

[0027] The names corresponding to the reference numerals in the attached figures are as follows:

[0028] 1. Track; 2. Power trolley; 3. Water inlet hose; 4. First connecting rod; 5. Clearance hole; 6. Nut; 7. First guide rail; 8. Second guide rail; 9. Second connecting rod; 10. Anti-slip pad; 11. Suction cup; 12. Mounting box; 13. Transition pipe; 14. Chiller; 15. Booster pump; 16. Microcontroller; 17. First spray pipe; 18. Second spray pipe; 19. Sprayer head; 20. Solenoid valve; 21. Box body; 22. First partition; 23. Second partition; 24. Box door; 25. Limiting groove; 26. Sealing groove; 27. Sealing ring; 28. Limiting protrusion; 29. ​​Mounting groove; 30. Magnet; 31. Mounting base; 32. Drive motor; 33. Reducer; 34. Drive shaft; 35. Roller; 36. Limit switch. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; of course, they can also refer to a mechanical connection or an electrical connection; furthermore, they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0032] like Figure 1-9 As shown, the present invention provides an automatic crayfish spraying device, comprising several interconnected tracks 1, a power trolley 2 mounted on and moving along the tracks 1, a spraying mechanism mounted on the power trolley 2 and connected to a water inlet hose 3, and a connecting mechanism between two adjacent tracks 1; the assembly mechanism includes a first connecting rod 4 and a clearance hole 5 mounted on the tracks 1, and a nut 6 threadedly connected to the first connecting rod 4; when two adjacent tracks 1 are assembled, the first connecting rod 4 on one track 1 is located in the clearance hole 5 on the other track 1 and fixed by the nut 6.

[0033] In this invention, the power trolley 2 drives the spraying mechanism to move back and forth on the track 1, so that the spraying mechanism can move around the shrimp frame. The spraying mechanism sprays the water source in the water inlet hose 3 into the shrimp frame, thereby reducing the labor intensity of workers. At the same time, it can also perform spraying operations on the shrimp frame in a cyclical manner, thereby improving the spraying effect and keeping the crayfish in the shrimp frame in a humid environment, thereby reducing the mortality rate of crayfish during storage.

[0034] The track 1 of this utility model is connected by splicing, which makes it easy to store and install the track 1. During assembly, the first connecting rod 4 on one track 1 is installed in the clearance hole 5 on another track 1, and the nut 6 is installed on the first connecting rod 4. After the track 1 is assembled, the water inlet hose 3 is connected to the spraying mechanism, the power trolley 2 is started, and the water in the water inlet hose 3 is sprayed onto the shrimp basket through the spraying mechanism, so that the crayfish in the shrimp basket are always in a moist environment, thereby reducing the mortality rate of crayfish in the shrimp basket.

[0035] In one embodiment, a more detailed structure of orbital 1 is provided, such as Figure 2 , Figure 3 , Figure 4 As shown, track 1 includes a first guide rail 7 and a second guide rail 8 arranged in parallel and offset, and a second connecting rod 9 disposed between the first guide rail 7 and the second guide rail 8; the first connecting rod 4 is disposed on the first guide rail 7, and a clearance hole 5 is opened on the second guide rail 8; the power trolley 2 is installed between the first guide rail 7 and the second guide rail 8. Specifically, the first guide rail 7 and the second guide rail 8 are arranged in parallel and offset, and the second connecting rod 9 can facilitate the fixing of the first guide rail 7 and the second guide rail 8, thereby improving the stability of the first guide rail 7 and the second guide rail 8; at the same time, the power trolley 2 is installed between the first guide rail 7 and the second guide rail 8, thereby facilitating the movement of the power trolley 2 between the first guide rail 7 and the second guide rail 8, thus facilitating the spraying operation of the shrimp frame.

[0036] In one embodiment, a more detailed structure of the first guide rail 7 and the second guide rail 8 is provided, such as... Figure 2 , Figure 3 , Figure 4 As shown, the first guide rail 7 and the second guide rail 8 are provided with anti-slip pads 10 to increase friction. Specifically, the anti-slip pads 10 can effectively increase the friction of the roller 35, thereby enabling the roller 35 to reciprocate on the first guide rail 7 and the second guide rail 8.

[0037] In one embodiment, a more detailed structure of the first guide rail 7 and the second guide rail 8 is provided, such as... Figure 2 , Figure 3 , Figure 4 As shown, suction cups 11 are provided at the bottom of the first guide rail 7 and the second guide rail 8. Specifically, the suction cups 11 are respectively provided at the bottom of the first guide rail 7 and the second guide rail 8. The suction cups 11 enable the first guide rail 7 and the second guide rail 8 to adhere to the ground, thereby improving the stability of the first guide rail 7 and the second guide rail 8 and facilitating the movement of the powered trolley 2.

[0038] In one embodiment, a more detailed structure of the spraying mechanism is provided. The spraying mechanism includes a mounting box 12 on the power trolley 2, a transition pipe 13 located in the mounting box 12 and connected to the water inlet hose 3, a chiller 14 and a booster pump 15 located on the transition pipe 13 and in the mounting box 12, a spraying device located on the mounting box 12 and connected to the transition pipe 13, and a microcontroller 16 located in the mounting box 12 and connected to the power trolley 2, the chiller 14, the booster pump 15 and the spraying device respectively. Specifically, the installation box 12 is mounted on the power trolley 2 and moves synchronously with the power trolley 2. One end of the transition pipe 13 is connected to the spraying device and the other end is connected to the water inlet hose 3. When in use, the water in the water inlet hose 3 passes through the chiller 14, and the chiller 14 controls the water temperature to below 8°C. Then, the booster pump 15 pressurizes the water in the transition pipe 13, so that the water is sprayed onto the shrimp basket through the spraying device, so that the crayfish in the shrimp basket are in a humid environment, thereby improving the survival rate of the crayfish in the shrimp basket.

[0039] The water inlet hose 3 of this utility model is connected to an external water source.

[0040] In one embodiment, a more detailed structure of the spraying device is provided, such as Figure 1 As shown, the spraying device includes a first spray pipe 17 connected to the transition pipe 13, a second spray pipe 18 disposed on the first spray pipe 17 and perpendicular to it, several nozzles 19 spaced apart on the first spray pipe 17 and the second spray pipe 18, and a solenoid valve 20 disposed on the first spray pipe 17 and connected to the microcontroller 16. Specifically, the first spray pipe 17 is connected to the transition pipe 13, the second spray pipe 18 is connected to the first spray pipe 17, the nozzles 19 are spaced apart on the first spray pipe 17 and the second spray pipe 18, and the solenoid valve 20 is disposed on the first spray pipe 17 and connected to the microcontroller 16. In use, the microcontroller 16 controls the solenoid valve 20 to open, and the water in the water inlet hose 3 enters the first spray pipe 17 and the second spray pipe 18 under the action of the booster pump 15 and is sprayed out from the nozzles 19, thereby completing the watering and cooling of the crayfish in the shrimp basket, thus improving the survival rate of the crayfish.

[0041] In one embodiment, a more detailed structure of the mounting box 12 is provided, such as Figure 5 , Figure 6 , Figure 7As shown, the mounting box 12 includes a box body 21 mounted on the power trolley 2, a first partition 22 and a second partition 23 disposed within the box body 21, a rotating door 24 mounted on the box body 21, and a sealing mechanism disposed between the box body 21 and the door 24; the chiller 14 is mounted on the first partition 22, and the booster pump 15 is mounted on the second partition 23. Specifically, the box body 21 is mounted on the power trolley 2, and the first partition 22 and the second partition 23 are disposed within the box body 21. The first partition 22 facilitates the installation of the chiller 14, and the second partition 23 facilitates the installation of the booster pump 15. The door 24 facilitates maintenance of the chiller 14 and the booster pump 15. Simultaneously, the sealing mechanism seals the gap between the door 24 and the box body 21, thereby preventing externally sprayed water from entering the box body 21 and damaging the chiller 14 and the booster pump 15.

[0042] In one embodiment, a more detailed structure of the sealing mechanism is provided, such as... Figure 5 and Figure 6 As shown, the sealing mechanism includes a limiting groove 25 formed on the housing 21, a sealing groove 26 provided in the limiting groove 25, a sealing ring 27 provided in the sealing groove 26, and a limiting protrusion 28 provided on the door 24 and adapted to the limiting groove 25; the limiting protrusion 28 is located in the limiting groove 25 and is tightly abutted against the sealing ring 27. Specifically, the limiting groove 25 is provided on the housing 21, the sealing groove 26 is provided in the limiting groove 25 and the sealing ring 27 is embedded in the sealing groove 26, and the limiting protrusion 28 is provided on the door 24. In use, when the door 24 is closed, the limiting protrusion 28 is located in the limiting groove 25 and abuts against the sealing ring 27, thereby sealing the gap between the housing 21 and the door 24 through the sealing ring 27, thus preventing water from entering the housing 21 and causing damage to the chiller 14 and the booster pump 15.

[0043] In one embodiment, the housing 21 and its more detailed fixing structure are provided, such as Figure 5 , Figure 6 , Figure 7 As shown, a mounting groove 29 is provided on the housing 21, and a magnet 30 is provided in the mounting groove 29. The door 24 is fixed to the housing 21 by the magnet 30. Specifically, the mounting groove 29 is provided on the housing 21, and the magnet 30 is installed in the mounting groove 29. In use, when the door 24 is closed, the magnet 30 can attract the door 24, thereby fixing the door 24.

[0044] In one embodiment, a more detailed fixing structure for the powered trolley 2 is provided, such as... Figure 1 and 8As shown, each end of the track 1 is equipped with a limit switch 36. The power trolley 2 includes a mounting base 31, a drive motor 32 located at the bottom of the mounting base 31, a reducer 33 located at the bottom of the mounting base 31 and connected to the output end of the drive motor 32, a transmission shaft 34 rotatably located at the bottom of the mounting base 31 and connected to the output end of the bottom of the mounting base 31, and two rollers 35 located at both ends of the transmission shaft 34 and adapted to the track 1. Specifically, the drive motor 32 is located at the bottom of the mounting base 31, the reducer 33 is located at the bottom of the mounting base 31 and connected to the output end of the drive motor 32, the transmission shaft 34 is rotatably located at the bottom of the mounting base 31 and connected to the output end of the reducer 33, and each end of the transmission shaft 34 is equipped with two rollers 35 adapted to the track 1. In use, the drive motor 32 drives the transmission shaft 34 to rotate through the reducer 33, and the transmission shaft 34 drives the rollers 35 to rotate, thereby causing the rollers 35 to move along the track 1. When the power trolley 2 comes into contact with one of the limit switches 36, the microcontroller 16 controls the drive motor 32 to rotate in reverse or forward, so that the power trolley 2 can move back and forth on the track 1.

[0045] The preferred microcontroller for this invention is the STM32F103.

[0046] The drive motor 32 of this utility model is preferably a forward and reverse reversible motor.

[0047] Working principle.

[0048] First, determine the installation position of track 1 based on the location of the shrimp basket placement area, select the required track 1, and assemble two adjacent tracks 1 (place the first connecting rod 4 on one track 1 into the clearance hole 5 on the other track 1 and fix it with the nut 6 to complete the assembly of the two adjacent tracks 1), and fix the track 1 to the ground with the suction cup 11. After the track 1 is assembled, install two limit switches 36 on the assembled track 1 respectively (the distance between the two limit switches 36 is the moving distance of the power trolley 2, that is, one limit switch 36 is the starting point and the other limit switch 36 is the ending point), and place the power trolley 2 on the track 1; then connect the water inlet hose 3 to the transition pipe 13 to complete the assembly of the spray water device;

[0049] During spraying, the microcontroller 16 controls the operation of the drive motor 32, chiller 14, and booster pump 15. At this time, the drive motor 32 rotates forward, the solenoid valve 20 is open, and the drive motor 32 drives the transmission shaft 34 to rotate through the reducer 33. The transmission shaft 34 drives the roller 35, thereby making the mounting base 31, mounting box 12, chiller 14, booster pump 15, first spray pipe 17 and second spray pipe 18 move synchronously. When the water in the inlet hose 3 passes through the chiller 14, the water temperature is lower than 8°C. At the same time, the water is sprayed out through the nozzles on the first spray pipe 17 and second spray pipe 18 under the action of the booster pump 15, thereby realizing the spraying of the shrimp frame.

[0050] When the mounting base 31 contacts one of the limit switches 36 (this limit switch 36 is the endpoint), the microcontroller 16 controls the drive motor 32 to reverse. The drive motor 32 drives the transmission shaft 34 to reverse through the reducer 33. The transmission shaft 34 drives the roller 35 to rotate, thereby causing the mounting base 31, mounting box 12, chiller 14, booster pump 15, first spray pipe 17 and second spray pipe 18 to move synchronously in opposite directions. When the mounting base 31 contacts the other limit switch 36 (this limit switch 36 is the starting point), the drive motor 32 drives the transmission shaft 34 to rotate forward through the reducer 33. The transmission shaft 34 drives the roller 35 to rotate, from... The mounting base 31, mounting box 12, chiller 14, booster pump 15, first spray pipe 17 and second spray pipe 18 move synchronously, allowing the mounting box 12, chiller 14, booster pump 15, first spray pipe 17 and second spray pipe 18 to reciprocate. This process is repeated three times to complete the water spraying operation on the shrimp basket. The microcontroller 16 controls the drive motor 32, chiller 14, booster pump 15 and solenoid valve 20 to close, thus facilitating the spraying of crayfish, thereby reducing the temperature of the crayfish in the basket, keeping the crayfish in a humid environment, and reducing the mortality rate of crayfish in the basket.

[0051] The drive motor 32, chiller 14, booster pump 15, microcontroller 16 and limit switch 36 used in this utility model are existing technologies and can be purchased and used directly on the market. Therefore, the structure, circuit and principle of the drive motor 32, chiller 14, booster pump 15, microcontroller 16 and limit switch 36 will not be described in detail here.

[0052] Finally, it should be noted that the above embodiments are merely preferred embodiments of this utility model used to illustrate the technical solutions of this utility model, and are not intended to limit it, nor are they intended to limit the patent scope of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. That is to say, any changes or refinements made to the main design concept and spirit of this utility model that are not of substantial significance, but whose technical problems are still consistent with those of this utility model, should be included within the protection scope of this utility model. In addition, the direct or indirect application of the technical solutions of this utility model to other related technical fields are similarly included within the patent protection scope of this utility model.

Claims

1. A device for automatically spraying water on crayfish, characterized in that, It includes several rails (1) that can be assembled with each other, a power trolley (2) set on the rails (1) and moving along the rails (1), a spraying mechanism set on the power trolley (2) and connected to the water inlet hose (3), and a connecting mechanism set between two adjacent rails (1); the assembly mechanism includes a first connecting rod (4) and a clearance hole (5) set on the rails (1), and a nut (6) threadedly connected to the first connecting rod (4); when two adjacent rails (1) are assembled, the first connecting rod (4) on one rail (1) is located in the clearance hole (5) on the other rail (1) and fixed by the nut (6).

2. The device according to claim 1, wherein the device is characterized by: The track (1) includes a first guide rail (7) and a second guide rail (8) arranged in parallel and offset, and a second connecting rod (9) located between the first guide rail (7) and the second guide rail (8); the first connecting rod (4) is located on the first guide rail (7), the clearance hole (5) is opened on the second guide rail (8), and the power trolley (2) is installed between the first guide rail (7) and the second guide rail (8).

3. The device according to claim 2, wherein the water spraying device is characterized in that, The first guide rail (7) and the second guide rail (8) are provided with anti-slip pads (10) to increase friction.

4. The device according to claim 2, wherein the water spraying device is characterized in that, The bottom of the first guide rail (7) and the second guide rail (8) are provided with suction cups (11).

5. The device according to claim 1, wherein the device is characterized by: The spraying mechanism includes a mounting box (12) on the power trolley (2), a transition pipe (13) inside the mounting box (12) and connected to the water inlet hose (3), a chiller (14) and a booster pump (15) on the transition pipe (13) and located inside the mounting box (12), a spraying device on the mounting box (12) and connected to the transition pipe (13), and a microcontroller (16) inside the mounting box (12) and connected to the power trolley (2), the chiller (14), the booster pump (15) and the spraying device respectively.

6. The device according to claim 5, wherein the water spraying device is characterized in that, The spray device includes a first spray pipe (17) connected to the transition pipe (13), a second spray pipe (18) disposed on the first spray pipe (17) and perpendicular to the first spray pipe (17), a plurality of nozzles (19) spaced apart on the first spray pipe (17) and the second spray pipe (18), and a solenoid valve (20) disposed on the first spray pipe (17) and connected to the microcontroller (16).

7. The device according to claim 5, wherein the water spraying device is characterized in that, The mounting box (12) includes a box body (21) mounted on the power trolley (2), a first partition (22) and a second partition (23) mounted inside the box body (21), a rotating box door (24) mounted on the box body (21), and a sealing mechanism between the box body (21) and the box door (24); a chiller (14) is mounted on the first partition (22), and a booster pump (15) is mounted on the second partition (23).

8. The device according to claim 7, wherein the water spraying device is characterized in that, The sealing mechanism includes a limiting groove (25) opened on the box body (21), a sealing groove (26) provided in the limiting groove (25), a sealing ring (27) provided in the sealing groove (26), and a limiting protrusion (28) provided on the box door (24) and adapted to the limiting groove (25); the limiting protrusion (28) is located in the limiting groove (25) and is close to the sealing ring (27).

9. The device according to claim 7, wherein the water spraying device is characterized in that, The box body (21) has an installation groove (29) and a magnet (30) is provided in the installation groove (29). The box door (24) is fixed to the box body (21) by the magnet (30).

10. The device according to claim 1, wherein the device is characterized by: The track (1) is provided with a limit switch (36) at each end. The power trolley (2) includes a mounting base (31), a drive motor (32) located at the bottom of the mounting base (31), a reducer (33) located at the bottom of the mounting base (31) and connected to the output end of the drive motor (32), a drive shaft (34) located at the bottom of the mounting base (31) and connected to the output end of the bottom of the mounting base (31), and two rollers (35) located at both ends of the drive shaft (34) and adapted to the track (1).

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