Detection equipment for environmental pollutants in lake water body

Abstract

The utility model belongs to the technical field of water body detection equipment, and particularly relates to lake water body environmental pollutant detection equipment which comprises a box body, an installation disc is rotationally installed in the box body, a plurality of collection pipes are movably connected to the top face of the installation disc in a sleeved mode, and the bottom ends of the collection pipes make contact with the inner bottom face of the installation disc; the two spiral blades are rotatably mounted on the outer side wall of the box body, a mounting box is fixedly mounted on the inner bottom surface of the box body, a double-shaft motor is fixedly mounted in the mounting box, and the two ends of an output shaft of the double-shaft motor are fixedly connected with transmission shafts of the two spiral blades respectively; when the equipment is used, a worker firstly puts the equipment into a lake needing to be sampled, at the moment, the double-shaft motor is started, the double-shaft motor drives one spiral blade to rotate by controlling the transmission shaft on one side, so that the whole equipment is driven to move in the lake, the position of the equipment in water does not need to be manually adjusted through the structure, and the equipment is convenient to use. And the device is simple, practical and convenient.

Description

A detection device for pollutants in lake water. Technical Field

[0001] This utility model belongs to the technical field of water body detection equipment, and in particular relates to a detection device for pollutants in lake water environment. Background Technology

[0002] Environmental protection has received increasing attention from the country. my country has listed environmental protection as a basic national policy and is making great efforts to improve environmental quality. As a sub-sector of environmental protection, the water quality monitoring industry has also received attention from government departments at all levels.

[0003] Most existing devices can only sample in fixed water areas, and can only obtain single samples. They cannot accurately obtain water samples from the entire area, and the sampling range is very limited. Moreover, when sampling different locations in the same area, existing devices need to be sampled repeatedly, and the position of the device needs to be adjusted manually. If the manual placement is inaccurate, it needs to be adjusted again, which is very inconvenient and affects work efficiency. In view of this, we propose a detection device for pollutants in lake water environment. Summary of the Invention

[0004] The purpose of this invention is to provide a detection device for pollutants in lake water bodies, so as to solve the problems mentioned in the background art.

[0005] In view of this, the present invention provides a detection device for pollutants in lake water environment, comprising:

[0006] The box has a platform fixedly installed on its top surface and an installation plate rotatably installed inside the box. Multiple collection tubes are movably sleeved on the top surface of the installation plate, and the bottom ends of the multiple collection tubes are in contact with the bottom surface of the inner side of the installation plate.

[0007] Two helical blades are rotatably mounted on the outer wall of the housing. An installation box is fixedly installed on the inner bottom surface of the housing. A dual-axis motor is fixedly installed inside the installation box. The two ends of the output shaft of the dual-axis motor are respectively fixedly connected to the drive shafts of the two helical blades.

[0008] Multiple sets of clamping components are provided, each set of clamping components is disposed on the inner bottom surface of the mounting plate, and is used to clamp multiple collection tubes;

[0009] A drive assembly is disposed on the inner bottom surface of the housing and is used to drive the mounting plate to rotate.

[0010] In the above technical solution, the clamping assembly further includes multiple fixing plates, all of which are fixedly installed on the inner bottom surface of the mounting plate. The multiple fixing plates are evenly distributed, and a spring rod is fixedly installed on one side of each of the multiple fixing plates. Multiple sliding plates are slidably installed on the inner bottom surface of the mounting plate. One side of each of the multiple sliding plates is fixedly connected to one end of each of the multiple spring rods, and the other side of each of the multiple sliding plates is in contact with the outer wall of the collecting tube.

[0011] In the above technical solution, the driving component further includes a second bevel gear, which is rotatably mounted on the top surface of the mounting box. The top end of the second bevel gear is fixedly connected to the bottom surface of the mounting plate. A second motor is fixedly mounted on the bottom surface inside the housing. A first bevel gear is fixedly mounted on one end of the output shaft of the second motor. The first bevel gear meshes with the second bevel gear.

[0012] In the above technical solution, furthermore, electric propellers are provided on both sides of the housing, and third mounting seats are fixedly installed on both sides of the housing. One end of the mounting shafts of the two electric propellers is rotatably connected to the two third mounting seats respectively. Two first mounting seats are fixedly installed on both sides of the housing. Two telescopic cylinders are rotatably installed in the two first mounting seats. Mounting plates are fixedly installed on the outer walls of the two electric propellers. A second mounting seat is fixedly installed on one side of the two mounting plates. One end of the two telescopic cylinders is rotatably connected to the two second mounting seats respectively.

[0013] In the above technical solution, further, a mounting frame is fixedly installed on the top surface of the tabletop, a fixing box is fixedly installed on the inner bottom surface of the mounting frame, a water pipe roller is rotatably installed inside the fixing box, one end of the water pipe roller passes through one side of the tabletop and extends to the outside, a water suction faucet is fixedly installed on one end of the water pipe roller, a first motor is fixedly installed on the top surface of the mounting frame, and the bottom end of the output shaft of the first motor passes through the top surface of the mounting frame and is fixedly connected to the top surface of the water pipe roller.

[0014] In the above technical solution, a water pump is further fixedly installed on the outer wall of the platform, and a water outlet pipe is fixedly installed on one side of the water pump. One end of the water outlet pipe passes through one side of the platform and extends above one of the collection pipes. A water inlet pipe is fixedly installed on the other side of the water pump, and one end of the water inlet pipe passes through the other side of the platform and is fixedly connected to the outer wall of the water pipe roller.

[0015] In the above technical solution, an air chamber is further fixedly installed on the bottom surface of the box.

[0016] The beneficial effects of this utility model are:

[0017] 1. The equipment for detecting pollutants in the lake's water environment is designed to be used by placing the device into the lake where sampling is required. The dual-axis motor is then activated, controlling one of the drive shafts to rotate one of the spiral blades, thus moving the entire device across the lake. Once the device is in the designated position, the first motor is activated to lower the water pipe wound around the water pipe roller into the water. The length of the water pipe is adjusted according to the required sampling depth. A water pump is then activated to draw water from the lake through the suction nozzle and deliver it through the outlet pipe to a collection pipe. Finally, the other drive shaft of the dual-axis motor is activated, rotating the other spiral blade to achieve the return trip. This structure eliminates the need for manual adjustment of the device's position in the water and allows for sampling at different depths, offering simplicity, practicality, and convenience.

[0018] 2. The equipment for detecting pollutants in the lake's water environment, when requiring water sampling at multiple locations within the lake, activates the electric propellers on both sides of the casing after sampling is complete. The angle of the electric propellers is adjusted by extending and retracting the telescopic cylinders. Then, a dual-shaft motor is activated to control the drive shaft on one side, driving one of the spiral blades to rotate, allowing the equipment to move freely within the lake. The location to be sampled is adjusted using the telescopic cylinders. The two electric propellers, in conjunction with the spiral blades, move the equipment to the designated position. At this point, a second motor is activated, driving the first bevel gear. The first and second bevel gears mesh, rotating the mounting plate and moving the empty collection pipe on the mounting plate below the outlet pipe. Finally, a water pump is activated to pump water from the lake, achieving the effect of sampling different areas. This method is simple and practical. Attached Figure Description

[0019] Figure 1 is one of the overall structural schematic diagrams of this utility model;

[0020] Figure 2 is a second structural schematic diagram of this utility model;

[0021] Figure 3 is a schematic diagram of the internal bottom structure of this utility model;

[0022] Figure 4 is a schematic diagram of the cross-sectional structure of this utility model;

[0023] Figure 5 is a schematic diagram of a half-section structure in this utility model;

[0024] Figure 6 is a schematic diagram of the water delivery structure in this utility model;

[0025] Figure 7 is a schematic diagram of the structure of the electric propeller in this utility model in conjunction with the first mounting base, the telescopic cylinder and the second mounting base.

[0026] Figure 8 is an enlarged structural schematic diagram of point A in Figure 5 of this utility model.

[0027] The markings in the diagram are as follows:

[0028] 1. Housing; 2. Tabletop; 3. Mounting bracket; 4. First motor; 5. Mounting plate; 6. Collection pipe; 7. Water pump; 8. Spiral blade; 9. Electric propeller; 10. Fixing box; 11. Water pipe roller; 12. Mounting box; 13. Dual-shaft motor; 14. Air chamber; 15. Second motor; 16. First bevel gear; 17. Second bevel gear; 18. Water outlet pipe; 19. Water inlet pipe; 20. Water suction faucet; 21. Fixing plate; 22. Spring rod; 23. Sliding plate; 24. First mounting base; 25. Telescopic cylinder; 26. Second mounting base; 27. Third mounting base; 28. Mounting plate. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0030] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all 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. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0031] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] It should be noted that, in this application, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0034] Example 1:

[0035] Please refer to Figures 1-8. This embodiment provides a detection device for pollutants in lake water environment.

[0036] include:

[0037] The equipment consists of a housing 1, with a platform 2 fixedly mounted on its top surface. An installation plate 5 is rotatably mounted inside the housing 1, and multiple collection tubes 6 are movably fitted onto the top surface of the installation plate 5, with the bottom ends of each collection tube 6 contacting the inner bottom surface of the installation plate 5. Two spiral blades 8 are rotatably mounted on the outer wall of the housing 1. An installation box 12 is fixedly mounted on the inner bottom surface of the housing 1, and a dual-axis motor 13 is fixedly mounted inside the installation box 12. The two ends of the output shaft of the dual-axis motor 13 are respectively fixedly connected to the drive shafts of the two spiral blades 8. Multiple clamping assemblies are located on the inner bottom surface of the installation plate 5 and are used to clamp the multiple collection tubes 6. A drive assembly is located on the inner bottom surface of the housing 1 and is used to drive the installation plate 5 to rotate. When the equipment is in use, the worker first places the equipment into the installation plate 5. In the lake where sampling is required, the dual-axis motor 13 is started. The dual-axis motor 13 drives one of the spiral blades 8 to rotate through the drive shaft on one side, thereby moving the entire device in the lake. After the device is moved to the designated position, the first motor 4 is started to rotate and put the water pipe wound on the water pipe roller 11 into the water. The length of the water pipe is adjusted according to the required sampling depth. Then, the water pump 7 is started to draw water from the lake from the suction faucet 20 and deliver it to one of the collection pipes 6 through the water outlet pipe 18. Finally, the drive shaft on the other side of the dual-axis motor 13 is started to drive the other spiral blade 8 to rotate, achieving the effect of the device returning. This structure does not require manual adjustment of the device's position in the water and can sample water at different depths. It is simple, practical, and convenient.

[0038] Example 2:

[0039] This embodiment provides a detection device for pollutants in lake water environment, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0040] The clamping assembly includes multiple fixing plates 21, which are all fixedly installed on the inner bottom surface of the mounting plate 5. The fixing plates 21 are evenly distributed, and a spring rod 22 is fixedly installed on one side of each fixing plate 21. Multiple sliding plates 23 are slidably installed on the inner bottom surface of the mounting plate 5. One side of each sliding plate 23 is fixedly connected to one end of each spring rod 22, and the other side of each sliding plate 23 is in contact with the outer wall of the collection tube 6. When the collection tubes 6 are placed into the mounting plate 5, the multiple clamping assemblies clamp the bottom ends of the collection tubes 6, preventing the equipment from shaking due to water waves during operation, which would prevent the extracted water samples from being accurately delivered into the collection tubes 6. It also avoids the water samples from spilling out of the collection tubes 6 due to shaking, which has practical benefits.

[0041] Example 3:

[0042] This embodiment provides a detection device for pollutants in lake water environment, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0043] The drive assembly includes a second bevel gear 17, which is rotatably mounted on the top surface of the mounting box 12. The top of the second bevel gear 17 is fixedly connected to the bottom surface of the mounting plate 5. A second motor 15 is fixedly mounted on the bottom surface inside the housing 1. A first bevel gear 16 is fixedly mounted on one end of the output shaft of the second motor 15. The first bevel gear 16 meshes with the second bevel gear 17. When the second motor 15 is started, it rotates and drives the first bevel gear 16. The first bevel gear 16 meshes with the second bevel gear 17 and drives the mounting plate 5 to rotate, rotating the empty collection pipe 6 on the mounting plate 5 to below the water outlet pipe 18. Then, the water pump 7 is started to pump water from the lake, achieving the effect of sampling different areas. It is simple and practical.

[0044] Example 4:

[0045] This embodiment provides a detection device for pollutants in lake water environment, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0046] The housing 1 has electric propellers 9 on both sides, and third mounting bases 27 are fixedly installed on both sides of the housing 1. One end of the mounting shaft of each electric propeller 9 is rotatably connected to the two third mounting bases 27. Two first mounting bases 24 are fixedly installed on both sides of the housing 1. Two telescopic cylinders 25 are rotatably installed inside each of the two first mounting bases 24. Mounting plates 28 are fixedly installed on the outer walls of each of the two electric propellers 9. A second mounting base 26 is fixedly installed on one side of each of the two mounting plates 28. One end of each telescopic cylinder 25 is rotatably connected to the two second mounting bases 26. When the equipment needs to sample water from multiple locations in a lake, after the equipment has finished sampling, the electric propellers 9 on both sides of the housing 1 are started. The angle of the electric propellers 9 is adjusted by extending and retracting the telescopic cylinder 25. Then, the dual-axis motor 13 is started to control the transmission shaft on one side to drive one of the spiral blades 8 to rotate, allowing the equipment to move freely in the lake. The location to be sampled is adjusted by the telescopic cylinder 25. The two electric propellers 9 and the spiral blades 8 work together to move the equipment to the designated location, achieving the effect of sampling different areas. It is simple and practical.

[0047] Example 5:

[0048] This embodiment provides a detection device for pollutants in lake water environment, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] The mounting frame 3 is fixedly installed on the top surface of the platform 2. The mounting box 10 is fixedly installed on the bottom surface of the mounting frame 3. A water pipe roller 11 is rotatably installed inside the mounting box 10. One end of the water pipe roller 11 passes through one side of the platform 2 and extends to the outside. A water suction faucet 20 is fixedly installed on one end of the water pipe roller 11. A first motor 4 is fixedly installed on the top surface of the mounting frame 3. The bottom end of the output shaft of the first motor 4 passes through the top surface of the mounting frame 3 and is fixedly connected to the top surface of the water pipe roller 11. The first motor 4 is started to rotate and put the water pipe wound on the water pipe roller 11 into the water. The length of the water pipe is adjusted according to the required sampling depth. Then, the water pump 7 is started to draw water from the lake from the water suction faucet 20 and deliver it to one of the collection pipes 6 through the water outlet pipe 18. This structure can sample water at different depths. It is simple, practical and convenient.

[0050] Example 6:

[0051] This embodiment provides a detection device for pollutants in lake water environment, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0052] A water pump 7 is fixedly installed on the outer wall of the platform 2. A water outlet pipe 18 is fixedly installed on one side of the water pump 7. One end of the water outlet pipe 18 passes through one side of the platform 2 and extends above one of the collection pipes 6. A water inlet pipe 19 is fixedly installed on the other side of the water pump 7. One end of the water inlet pipe 19 passes through the other side of the platform 2 and is fixedly connected to the outer wall of the water pipe roller 11. When the water pump 7 is started, water from the lake is drawn out from the water suction faucet 20 and transported to one of the collection pipes 6 through the water outlet pipe 18. This facilitates the extraction of samples from different depths and areas, making it simple and practical.

[0053] Example 7:

[0054] This embodiment provides a detection device for pollutants in lake water environment, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] Among them, an air chamber 14 is fixedly installed on the bottom surface of the housing 1. The air chamber 14 allows the equipment to float on the water surface when it is in the water, which makes it convenient for the equipment to sample the water and has practical benefits.

[0056] In use: When using the equipment, the worker first places it into the lake where sampling is required. At this time, the dual-shaft motor 13 is started. The dual-shaft motor 13 drives one of the spiral blades 8 to rotate through the drive shaft on one side, thereby moving the entire equipment in the lake. After the equipment is moved to the designated position, the first motor 4 is started to rotate and put the water pipe wound on the water pipe roller 11 into the water. The length of the water pipe is adjusted according to the required sampling depth. Then, the water pump 7 is started to draw water from the lake from the suction faucet 20 and deliver it to one of the collection pipes 6 through the outlet pipe 18. Finally, the drive shaft on the other side of the dual-shaft motor 13 is started to drive the other spiral blade 8 to rotate, achieving the effect of equipment return. This structure does not require manual adjustment of the equipment's position in the water and can sample water at different depths. It is simple, practical, and convenient.

[0057] When the equipment needs to sample water from multiple locations in a lake, after the equipment completes the water sampling, the electric propellers 9 on both sides of the housing 1 are started. The angle of the electric propellers 9 is adjusted by extending and retracting the telescopic cylinder 25. Then, the dual-shaft motor 13 is started to control the transmission shaft on one side to drive one of the spiral blades 8 to rotate, allowing the equipment to move freely in the lake. The location to be sampled is adjusted by the telescopic cylinder 25. The two electric propellers 9 and the spiral blades 8 work together to move the equipment to the designated location. At this time, the second motor 15 is started. The rotation of the second motor 15 drives the first bevel gear 16. The first bevel gear 16 meshes with the second bevel gear 17 to drive the mounting plate 5 to rotate, rotating the empty collection pipe 6 on the mounting plate 5 to below the water outlet pipe 18. Then, the water pump 7 is started to pump water from the lake, achieving the effect of sampling different areas. It is simple and practical.

[0058] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A detection device for pollutants in lake water, characterized in that, include: A housing (1) has a table (2) fixedly installed on its top surface. An installation plate (5) is rotatably installed inside the housing (1). Multiple collection tubes (6) are movably sleeved on the top surface of the installation plate (5). The bottom ends of the multiple collection tubes (6) are in contact with the inner bottom surface of the installation plate (5). Two spiral blades (8) are rotatably installed on the outer wall of the housing (1). An installation box (12) is fixedly installed on the inner bottom surface of the housing (1). A dual-axis motor (13) is fixedly installed inside the installation box (12). The two ends of the output shaft of the dual-axis motor (13) are respectively fixedly connected to the drive shafts of the two spiral blades (8). Multiple clamping assemblies are all set on the inner bottom surface of the installation plate (5) and are used to clamp multiple collection tubes (6). A drive assembly is set on the inner bottom surface of the housing (1) and is used to drive the installation plate (5) to rotate.

2. The detection device for pollutants in lake water environment according to claim 1, characterized in that, The clamping assembly includes multiple fixing plates (21), which are all fixedly installed on the inner bottom surface of the mounting plate (5). The multiple fixing plates (21) are evenly distributed. A spring rod (22) is fixedly installed on one side of each of the multiple fixing plates (21). Multiple sliding plates (23) are slidably installed on the inner bottom surface of the mounting plate (5). One side of each of the multiple sliding plates (23) is fixedly connected to one end of each of the multiple spring rods (22), and the other side of each of the multiple sliding plates (23) is in contact with the outer wall of the collecting tube (6).

3. The detection device for pollutants in lake water environment according to claim 1, characterized in that, The drive assembly includes a second bevel gear (17), which is rotatably mounted on the top surface of the mounting box (12). The top end of the second bevel gear (17) is fixedly connected to the bottom surface of the mounting plate (5). A second motor (15) is fixedly mounted on the bottom surface inside the housing (1). A first bevel gear (16) is fixedly mounted on one end of the output shaft of the second motor (15). The first bevel gear (16) meshes with the second bevel gear (17).

4. The detection device for pollutants in lake water environment according to claim 1, characterized in that, Both sides of the housing (1) are provided with electric propellers (9). Both sides of the housing (1) are fixedly installed with third mounting bases (27). One end of the mounting shaft of each of the two electric propellers (9) is rotatably connected to the two third mounting bases (27). Both sides of the housing (1) are fixedly installed with two first mounting bases (24). Both first mounting bases (24) are rotatably installed with two telescopic cylinders (25). Both outer walls of the two electric propellers (9) are fixedly installed with mounting plates (28). One side of each mounting plate (28) is fixedly installed with a second mounting base (26). One end of each telescopic cylinder (25) is rotatably connected to the two second mounting bases (26).

5. The detection device for pollutants in lake water environment according to claim 1, characterized in that, A mounting bracket (3) is fixedly installed on the top surface of the tabletop (2). A fixing box (10) is fixedly installed on the bottom surface inside the mounting bracket (3). A water pipe roller (11) is rotatably installed inside the fixing box (10). One end of the water pipe roller (11) passes through one side of the tabletop (2) and extends to the outside. A water suction faucet (20) is fixedly installed on one end of the water pipe roller (11). A first motor (4) is fixedly installed on the top surface of the mounting bracket (3). The bottom end of the output shaft of the first motor (4) passes through the top surface of the mounting bracket (3) and is fixedly connected to the top surface of the water pipe roller (11).

6. The detection device for pollutants in lake water environment according to claim 1, characterized in that, A water pump (7) is fixedly installed on the outer wall of the platform (2). A water outlet pipe (18) is fixedly installed on one side of the water pump (7). One end of the water outlet pipe (18) passes through one side of the platform (2) and extends above one of the collection pipes (6). A water inlet pipe (19) is fixedly installed on the other side of the water pump (7). One end of the water inlet pipe (19) passes through the other side of the platform (2) and is fixedly connected to the outer wall of the water pipe roller (11).

7. The detection device for pollutants in lake water environment according to claim 1, characterized in that, An air chamber (14) is fixedly installed on the bottom surface of the box (1).

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