Sand taking specimen cabinet

By designing a sand extraction specimen cabinet that automatically filters sand and automatically filters sand with gravity, the problem of labor-consuming and low efficiency of the traditional sand filtering process is solved, and efficient sand filtering operation is achieved.

CN222325229UActive Publication Date: 2025-01-10云南澜沧江实业有限公司
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Patent Information

Application Number
CN202420971564.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-07
Publication Date
2025-01-10
Estimated Expiration
2034-05-07

AI Technical Summary

Technical Problem

The traditional sand filtering process consumes manpower and is inefficient, resulting in personnel fatigue and low sand filtering efficiency.

Method used

A sand extraction specimen cabinet is designed. By setting up a first placement part and a second placement part, the water flows into the sand filter device from a high place by gravity, realizing automatic sand filtering, saving manpower and improving efficiency.

Benefits of technology

There is no need for manual operation, the automatic sand filtering process saves manpower, improves sand filtering efficiency, and is suitable for continuous operation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The embodiment of the utility model discloses a sand taking specimen cabinet, which comprises a cabinet body and a placing rack, the placing rack is connected with the cabinet body, the placing rack comprises a first placing piece and a second placing piece which are arranged at an interval, the first placing piece is provided with a first placing position, the first placing position is used for placing a device for filtering sand, and the second placing piece is provided with a second placing position for placing a device for filtering sand. A second placing position corresponding to the first placing position is arranged on the second placing piece; and the second placing position is used for placing a device for containing sand-containing liquid. Through the arrangement of the first placing piece and the second placing piece, a device for filtering sand and a device for containing a sand-containing water source do not need to be manually held by hands to carry out sand filtering treatment on the water source, manpower is saved, and the sand filtering efficiency is guaranteed.
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Description

Technical Field

[0001] The utility model relates to the technical field of water source sand content detection, in particular to a sand sampling cabinet. Background Art

[0002] When testing the sand content of a certain water area, it is necessary to collect a certain amount of water and then filter the water to remove the sand. Generally, a filter is used to filter the water to remove the sand in the water. The sand content in a predetermined volume of water can be used to infer the sand content at a certain depth in the water area.

[0003] However, the traditional sand filtering work is to manually take water, hold the container with water source and pour the water into the sand filtering container. This is labor-intensive and will cause fatigue to the personnel over time, which is not conducive to continuous sand filtering and makes the sand filtering efficiency low. Utility Model Content

[0004] Based on this, it is necessary to propose a sand specimen cabinet that saves manpower and can ensure sand filtering efficiency in response to the above problems.

[0005] The utility model provides a sand specimen cabinet, comprising:

[0006] Cabinet;

[0007] And a placing rack, the placing rack is connected to the cabinet, the placing rack includes a first placing piece and a second placing piece which are arranged at intervals, the first placing piece is provided with a first placing position, the first placing position is used to place a device for filtering sand, the second placing piece is provided with a second placing position corresponding to the first placing position, the second placing position is used to place a device for containing sand-containing liquid.

[0008] In some embodiments, the first placing piece and the second placing piece are both placing plate structures, the first placing piece and the second placing piece are arranged in parallel, and the second placing piece is located higher than the first placing piece in the gravity direction.

[0009] In some embodiments, a first placement hole is passed through the first placement piece, and the first placement hole forms the first placement position. A second placement hole is passed through the second placement piece, and the second placement hole forms the second placement position. The first placement hole and the second placement hole are arranged opposite to each other.

[0010] In some embodiments, a first connecting groove connected to the first placing hole is formed on the first placing piece, the first connecting groove passes through the first placing piece, and the first connecting groove forms a notch on the first placing piece, and a second connecting groove connected to the second placing hole is formed on the second placing piece, the second connecting groove passes through the second placing piece, and the second connecting groove forms a notch on the second placing piece.

[0011] In some embodiments, a plurality of first placement holes are provided on the first placement member at intervals, and the diameters of at least some of the first placement holes gradually increase from small to large. A second placement hole is passed through the position corresponding to each of the first placement holes on the second placement member, and the diameters of at least some of the second placement holes gradually increase from small to large.

[0012] In some embodiments, a stabilizing member is provided at a position of the first placing member corresponding to the first placing position and a position of the second placing member corresponding to the second placing position, the stabilizing member encloses a stabilizing space, the stabilizing member also includes a first end and a second end for setting an opening of the enclosed space, the first end is used to connect with the first placing member and the second placing member.

[0013] In some embodiments, the placement rack further includes a positioning member, the second placement member is located between the positioning member and the first placement member, and a positioning groove is further provided at a position of the positioning member corresponding to the first placement position.

[0014] In some embodiments, a liquid collecting member is further disposed in the cabinet, the first placement member is located between the second placement member and the liquid collecting member, the liquid collecting member has a liquid collecting groove, and the liquid collecting groove is disposed corresponding to the first placement position.

[0015] In some embodiments, the cabinet body includes a back panel, two side panels and a bottom panel, the two side panels are fixedly connected to the opposite ends of the back panel and are located on the same side of the back panel, the bottom panel is simultaneously connected to the back panel and the two bottom panels, and the back panel, the two side panels and the bottom panel are arranged to form a storage space for accommodating the placement rack.

[0016] In some embodiments, the cabinet further includes at least one partition disposed in the accommodating space, wherein the partition divides the accommodating space into a plurality of sub-spaces, and each of the sub-spaces is provided with the placement rack.

[0017] The following beneficial effects are achieved by using the embodiments of the present invention:

[0018] According to the sand specimen cabinet in the above embodiment, by setting the first placement piece and the second placement piece, the first placement piece can be used to place the device for filtering sand, and the second placement piece can be used to place the device for holding the sand-containing water source. When the device for holding the sand-containing water source is placed on the second placement piece, the water source flows into the sand filtering device under the action of gravity for sand filtering treatment to obtain the sand in the water source. By setting the first placement piece and the second placement piece, there is no need for manual hands to hold the sand filtering device and the device for holding the sand-containing water source to filter the water source, which saves manpower and makes sand filtering more convenient. Moreover, continuous sand filtering can be performed by simply placing the corresponding device on the first placement piece and the second placement piece, thereby ensuring the efficiency of sand filtering. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] in:

[0021] Figure 1 The structure diagram of the sand specimen collection cabinet provided by the utility model is shown;

[0022] Figure 2 The front view of the sand specimen cabinet provided by the utility model is shown;

[0023] Figure 3 An exploded view of a part of the structure of the first placement member provided by the utility model is shown;

[0024] Figure 4 A schematic structural diagram of a first placement piece provided according to the utility model is shown.

[0025] Description of main component symbols:

[0026] 1. Cabinet; 11. Back panel; 12. Side panel; 13. Bottom panel; 14. Partition; 15. Storage structure; 2. Placement rack; 21. First placement piece; 211. First placement hole; 212. First connecting groove; 22. Second placement piece; 221. Second placement hole; 222. Second connecting groove; 23. Stabilizing piece; 231. First end; 232. Second end; 233. Notch; 234. Stabilizing space; 24. Positioning piece; 241. Positioning groove; 30. Liquid collecting piece. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] The utility model provides a sand sample cabinet, which can be used to provide support for a sand sample container to ensure smooth sand collection. It should be noted that when collecting sand, the water source (i.e., sand sample) whose sand content is to be measured needs to be placed in an open container, which is referred to as a "sand sample bottle" hereinafter. The sand sample bottle is generally a glass bottle. This application is convenient for placement and takes the sand sample bottle similar to a beer bottle as an example for explanation. The structural feature of this sand sample bottle is that there is a gradually shrinking bottleneck at one end between the bottle body and the bottle mouth (refer to the part between the bottle mouth and the bottle body of the beer bottle, the neck hereinafter is also the bottleneck). The vessel for filtering sand is preferably a funnel (hereinafter referred to as "funnel" to represent the sand filtering vessel). The funnel of the present application includes a conical body and a guide tube connected to the body. When filtering sand, a layer of filter paper is generally placed in the funnel, and the water source in the sand sample bottle is directly introduced into the funnel. The sand is filtered by the filter paper, and the water flows out through the opening at the lower end of the funnel. The sand left on the filter paper and the volume of the water source poured into the funnel are combined with a mathematical model to determine the sand content.

[0031] In one embodiment, see Figure 1 and Figure 2 The sand specimen cabinet comprises a cabinet body 1 and a placement rack 2. The cabinet body 1 is the main body of the specimen cabinet, which can support the placement rack 2 and provide a place for taking sand.

[0032] The placement rack 2 is connected to the cabinet 1, and the placement rack 2 includes a first placement piece 21 and a second placement piece 22 that are arranged at intervals. The first placement piece 21 is provided with a first placement position, and the first placement position is used to place devices for filtering sand. The second placement piece 22 is provided with a second placement position corresponding to the first placement position, and the second placement position is used to place devices for containing sand-containing liquid.

[0033] It should be noted that, since the gravity of the water source itself is used to flow into the funnel from a high place when taking sand, the first placement piece 21 is positioned below the second placement piece 22 in the direction of gravity. In this way, the sand sample bottle is located above the funnel in the direction of gravity, which is conducive to the water source in the sand sample bottle flowing into the funnel under gravity.

[0034] By setting the first placement piece 21 and the second placement piece 22, the first placement piece 21 can be used to place a device for filtering sand, and the second placement piece 22 can be used to place a device for holding a sand-containing water source. When the device for holding a sand-containing water source is placed on the second placement piece 22, the water source flows into the sand filtering device under the action of gravity to filter the sand to obtain the sand in the water source. By setting the first placement piece 21 and the second placement piece 22, there is no need for a person to hold the sand filtering device and the device for holding a sand-containing water source to filter the sand from the water source, which saves manpower and makes sand filtering more convenient. Moreover, continuous sand filtering can be performed by simply placing the corresponding device on the first placement piece 21 and the second placement piece 22, thereby ensuring the efficiency of sand filtering.

[0035] In one embodiment, see Figure 1 and Figure 2 The first placement piece 21 and the second placement piece 22 are both placement plate structures, the first placement piece 21 and the second placement piece 22 are arranged in parallel, and the second placement piece 22 is located higher than the first placement piece 21 in the gravity direction. The first placement piece 21 and the second placement piece 22 are arranged as plate-shaped structures, so that the first placement position can be set on the first placement piece 21 and the second placement position can be set on the second placement piece 22 better, and the plate-shaped structure will not occupy too much space in space, which can save space.

[0036] Specifically, the first placement piece 21 is penetrated by a first placement hole 211, which forms a first placement position; the second placement piece 22 is penetrated by a second placement hole 221, which forms a second placement position; the first placement hole 211 and the second placement hole 221 are arranged opposite to each other.

[0037] The device for containing water and the device for filtering sand are placed in the second placement hole 221 and the first placement hole 211 respectively. The first placement hole 211 and the second placement hole 221 can play a role in fixing the positions of the devices.

[0038] Moreover, the shapes and sizes of the first placement hole 211 and the second placement hole 221 are preferably determined according to the appearances of the two devices. For example, the sand sample bottle and the funnel for filtering sand in the present application are both structures with circular cross-sections. Therefore, the first placement hole 211 and the second placement hole 221 are both set as circular holes, and the centers of the two corresponding first placement holes 211 and the second placement holes 221 coincide.

[0039] There are requirements for the sizes of the first placement hole 211 and the second placement hole 221. For example, the second placement hole 221 is used to place a sand sample bottle. The sand sample bottle has a bottleneck whose size gradually decreases from the bottle body to the opening. The size of the second placement hole 221 can be set to be consistent with the size of the middle position of the bottleneck or the position close to the bottle body, so that the bottle can be stuck in the second placement hole 221. The same principle applies to the funnel, which will not be described in detail here.

[0040] By setting the first placement hole 211 and the second placement hole 221 , the relative positions of the sand sample bottle and the funnel can be fixed, so that when the water container is placed in the second placement hole 221 , the water inside the water container can flow into the funnel located in the first placement hole 211 .

[0041] In a specific embodiment, please refer to Figure 3 or Figure 4 The first placing piece 21 is provided with a first connecting groove 212 connected to the first placing hole 211, the first connecting groove 212 penetrates the first placing piece 21, and the first connecting groove 212 forms a notch 233 on the first placing piece 21, the size of the notch 233 is greater than or equal to the size of the guide tube at the bottom end of the funnel, and smaller than the size of the first placing hole 211; the second placing piece 22 is provided with a second connecting groove 222 connected to the second placing hole 221, the second connecting groove 222 penetrates the second placing piece 22, and the second connecting groove 222 forms a notch 233 on the second placing piece 22, the size of the notch 233 is greater than or equal to the size of the neck of the sand sample bottle, and smaller than the size of the second placing hole 221.

[0042] Since the sand sample bottle has a neck and the funnel has an elongated guide tube for circulating water, when placing and taking devices, the neck or guide tube structure needs to completely leave the range of the placement hole so that the sand sample bottle and the funnel can be smoothly separated from the placement piece. However, this requires the two placement pieces to reserve sufficient space in the direction of the opening of the placement hole for the device to pass through.

[0043] In this embodiment, the first connecting groove 212 and the second connecting groove 222 are provided to facilitate the passage of the neck of the sand sample bottle and the guide tube of the funnel, thereby minimizing the size of the clearance space required when taking the sand sample bottle and the funnel.

[0044] In a specific embodiment, please refer to Figure 1 , Figure 2 and Figure 4 The first placement member 21 is provided with a plurality of first placement holes 211 arranged at intervals, and the diameters of at least some of the first placement holes 211 gradually increase from small to large. The second placement member 22 has a second placement hole 221 passing through the position corresponding to each first placement hole 211, and the diameters of at least some of the second placement holes 221 gradually increase from small to large. Because the first placement holes 211 and the second placement holes 221 are arranged in a one-to-one correspondence, the figure only takes the first placement holes 211 as an example.

[0045] When taking sand, it is necessary to take water sources at different depths, such as once from the surface, once at a depth of three meters, or once at a depth of nine meters. By setting a plurality of first placement holes 211 and corresponding second placement holes 221, water sources taken from different depths can be placed respectively, and sand filtering can be performed on water sources at different depths.

[0046] The sizes of these placement holes can be consistent or inconsistent, or partially consistent and partially inconsistent. The placement holes of consistent sizes can provide sand filtering positions for water sources with consistent depths, and water sources with inconsistent depths can use placement holes of different sizes as sand filtering positions.

[0047] Alternatively, different sizes of bottles may require placement holes of different sizes to stabilize them. The volume (ie, size) of the bottle that needs to hold water is determined based on the actual volume of water taken, and the size of the placement hole is then determined based on the volume of the bottle.

[0048] Therefore, by setting multiple placement holes and setting the size of the placement holes, not only can multiple groups of sand filtering operations be carried out simultaneously, but also the corresponding placement holes can be selected as placement positions according to the required water intake capacity, making the sand filtering operation more flexible and portable.

[0049] In one embodiment, see Figure 1 and Figure 3 A stabilizing member 23 is provided at the position of the first placing member 21 corresponding to the first placing position and at the position of the second placing member 22 corresponding to the second placing position. The stabilizing member 23 surrounds a stabilizing space 234. The stabilizing member 23 also includes a first end 231 and a second end 232 that are used to set an opening of the enclosed space. The first end 231 is used to connect with the first placing member 21 and the second placing member 22.

[0050] Specifically, the stabilizing member 23 is a plate-mounted structure, which can be bent and surrounded to form a stabilizing space 234. The shape and size of the stabilizing space 234 are determined according to the shape and size of the portion of the corresponding device that needs to be stabilized.

[0051] In the present application, the stabilizing member 23 located on the first placing member 21 is arranged on a side of the first placing member 21 facing away from the second placing member 22, and its first end 231 is fixedly connected to the first placing member 21 by gluing or screws. The stabilizing member 23 located on the second placing member 22 is arranged on the side of the second placing member 22 facing the first placing member 21, and its first end 231 is fixedly connected to the second placing member 22 by gluing or screws.

[0052] The sand sample bottle in the present application has a neck, which is passed through the second placement hole 221 for fixation, and the neck has a similar structure to the neck of a beer bottle, that is, the neck of the sand sample bottle is truncated into a cone shape. The sand filter device in the present application is preferably a funnel, and the funnel part is also truncated into a cone shape, and the funnel part is passed through the first placement hole 211 for fixation.

[0053] The stabilizing member 23 located on the first placing member 21 and the second placing member 22 needs to stabilize the funnel body and the neck of the sand sample bottle respectively, that is, the shape of the stabilizing space 234 enclosed by the stabilizing member 23 needs to be adapted to the two, that is, both are truncated cones, and the size is determined according to the actual size, so that the inner wall of the stabilizing member 23 can be completely fitted on the outer wall of the neck of the sand sample bottle, and on the outer wall of the funnel body.

[0054] In addition, the first placement member 21 is provided with a first connecting groove 212 communicating with the first placement hole 211, the second placement member 22 is provided with a second connecting groove 222 communicating with the second placement hole 221, and the stabilizing member 23 is also provided with a notch 233, which extends from the first end to the second end and runs through the stabilizing member 23, that is, the stabilizing member 23 is open when it is bent to enclose the stabilizing space 234, and is not closed. This notch 233 can communicate with the first connecting groove 212 or the second connecting groove 222.

[0055] In one embodiment, the placement rack 2 further includes a positioning member 24 , the second placement member 22 is located between the positioning member 24 and the first placement member, and a positioning groove 241 is further provided at a position of the positioning member 24 corresponding to the first placement hole 211 .

[0056] By providing the positioning member 24 and the positioning groove 241 , if a sand sample bottle with a larger volume is encountered, the end of the sand sample bottle can be inserted into the positioning groove 241 to fix the position of the end of the sand sample bottle.

[0057] In one embodiment, a liquid collecting member 30 is further provided in the cabinet 1, and the first placement member 21 is located between the second placement member 22 and the liquid collecting member 30, that is, the liquid collecting member 30 is located below the first placement member 21. The liquid collecting member 30 has a liquid collecting groove (not shown in the figure), and the liquid collecting groove is arranged corresponding to the first placement position.

[0058] Specifically, the liquid collecting tank is arranged opposite to the first placement hole 211, and when the funnel is placed in the first placement hole 211, the end of the funnel's guide tube faces the liquid collecting tank, so that the water source treated by filtering sand can flow into the liquid collecting tank, thereby collecting the water source after filtering sand and avoiding waste.

[0059] In one embodiment, the cabinet 1 includes a back panel 11, two side panels 12 and a bottom panel 13. The two side panels 12 are fixedly connected to opposite ends of the back panel 11 and are located on the same side of the back panel 11. The two side panels 12 are arranged vertically with the back panel 11. The bottom panel 13 is connected to the back panel 11 and the two bottom panels 13 at the same time. The back panel 11, the two side panels 12 and the bottom panel 13 are surrounded to form a storage space for accommodating the placement rack 2.

[0060] It should be noted that the cabinet 1 may further include a top plate, which is located away from the bottom plate 13. The bottom plate 13 of the cabinet 1 is used to support the cabinet 1 and is placed on the ground, and the top plate can play a role in reinforcing the cabinet 1. In addition, a storage structure 15 can be provided on the top plate of the cabinet 1 for storing sand sample bottles and funnels.

[0061] In a specific embodiment, the cabinet 1 further includes at least one partition 14 disposed in the storage space, the partition 14 is disposed vertically, and the partition 14 is parallel to the side plate 12, and the two ends of the partition 14 are respectively connected to the top plate and the bottom plate 13. The partition 14 divides the storage space into a plurality of subspaces, and each subspace is provided with a placement rack 2. In this way, a plurality of placement racks 2 can be disposed in the storage space of the cabinet 1, so that multiple groups of sand taking work can be performed simultaneously to take sand, thereby increasing the efficiency of sand taking.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A sand specimen cabinet, characterized in that: include: Cabinet; And a placing rack, the placing rack is connected to the cabinet, the placing rack includes a first placing piece and a second placing piece which are arranged at intervals, the first placing piece is provided with a first placing position, the first placing position is used to place a device for filtering sand, the second placing piece is provided with a second placing position corresponding to the first placing position, the second placing position is used to place a device for containing sand-containing liquid.

2. The sand specimen cabinet according to claim 1, characterized in that: The first placement piece and the second placement piece are both placement plate structures. The first placement piece and the second placement piece are arranged in parallel, and the second placement piece is located higher than the first placement piece in the gravity direction.

3. The sand specimen cabinet according to claim 2, characterized in that: The first placement piece has a first placement hole extending therethrough, the first placement hole forming the first placement position, the second placement piece has a second placement hole extending therethrough, the second placement hole forming the second placement position, and the first placement hole and the second placement hole are arranged opposite to each other.

4. The sand specimen cabinet according to claim 3, characterized in that: The first placing piece is provided with a first communicating groove connected to the first placing hole, the first communicating groove penetrates the first placing piece, and the first communicating groove forms a notch on the first placing piece, and the second placing piece is provided with a second communicating groove connected to the second placing hole, the second communicating groove penetrates the second placing piece, and the second communicating groove forms a notch on the second placing piece.

5. The sand specimen cabinet according to claim 3, characterized in that: The first placing piece is provided with a plurality of first placing holes arranged at intervals, and the apertures of at least some of the first placing holes gradually increase from small to large. A second placing hole is penetrated at a position corresponding to each of the first placing holes on the second placing piece, and the apertures of at least some of the second placing holes gradually increase from small to large.

6. The sand specimen cabinet according to claim 1, characterized in that: The first placement piece is provided with a stabilizing piece at a position corresponding to the first placement position and the second placement piece is provided with a stabilizing piece at a position corresponding to the second placement position. The stabilizing piece surrounds a stabilizing space. The stabilizing piece also includes a first end and a second end for setting an opening of the stabilizing space. The first end is used to connect with the first placement piece and the second placement piece.

7. The sand specimen cabinet according to claim 1, characterized in that: The placement rack further includes a positioning member, the second placement member is located between the positioning member and the first placement member, and a positioning groove is further provided on the positioning member at a position corresponding to the first placement position.

8. The sand specimen cabinet according to claim 1, characterized in that: The cabinet is also provided with a liquid collecting member, the first placement member is located between the second placement member and the liquid collecting member, the liquid collecting member has a liquid collecting groove, and the liquid collecting groove is arranged corresponding to the first placement position.

9. The sand specimen cabinet according to any one of claims 1 to 8, characterized in that: The cabinet body includes a back panel, two side panels and a bottom panel, the two side panels are fixedly connected to the opposite ends of the back panel and are located on the same side of the back panel, the bottom panel is connected to the back panel and the two bottom panels at the same time, and the back panel, the two side panels and the bottom panel are surrounded to form a storage space for accommodating the placement rack.

10. The sand specimen cabinet according to claim 9, characterized in that: The cabinet body further comprises at least one partition plate arranged in the accommodating space, wherein the partition plate divides the accommodating space into a plurality of sub-spaces, and each of the sub-spaces is provided with the placement rack.