Arbor core storage device

Abstract

The utility model discloses an arbor core storage device, and relates to the technical field of forest annual ring analysis, flexible fixing and positioning of a core are realized through combination of a bottom plate, a sliding block, a piston and a storage strip, a bottom air bag and a side air bag are arranged in a groove of the storage strip, and the core is uniformly supported and protected through inflation and deflation adjustment, so that the storage strip is convenient to use. The moisture absorption material in the moisture absorption box controls the internal humidity and keeps the quality of the tree core stable, the extending end of the storage strip is convenient to grab and pull out, the guide structure of the sliding block and the bottom plate ensures stable movement, and the cover plate and the protective cover are arranged so that label cards can be placed, light observation can be blocked, and the influence of light on the components of the tree core can be avoided. The stability and the sealing performance of the device are improved through the end cover and the support, and the safety and the convenience of tree core storage are effectively improved through the device.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tree ring analysis, and specifically relates to a tree core storage device. BACKGROUND

[0002] In the research of forestry, ecology, climatology and environmental science, the acquisition and preservation of tree core samples (tree ring samples) are of great significance to the accuracy of subsequent analysis and research results. Traditional tree core storage and transportation methods are often extensive, which can easily cause the sample to break, deform or become moldy during transportation and storage, thereby affecting the reliability and accuracy of the analysis of the tree ring structure and chemical composition.

[0003] Chinese invention patent CN 105928736 B discloses a portable tree ring sample storage and transportation device. Through the combination of the sample storage plate and the transportation box, the sample core is stored in an orderly manner. The shock-absorbing spacer provides flexible support for the sample core, reducing the risk of sample breakage and damage. The auxiliary ventilation hole and the sealing plug improve the safety and convenience of storage and transportation. However, this scheme mainly focuses on overall shock absorption and orderly storage, and still lacks detailed control of the sample in terms of humidity control, light protection and quick identification of sample information. Moreover, it lacks the detailed control of the flexible structure for the individual fixation and protection of the tree core.

[0004] Chinese utility model patent CN 220244212 U discloses a field portable tree core storage device. The design of the ventilation hole and the storage tube drying hole improves the air permeability to some extent, reduces the risk of tree core sample decay, and enhances the portability of the device. However, the design of this scheme is still relatively simple, lacking a structure for precise positioning and flexible clamping of the tree core, which cannot effectively prevent micro-damage to the tree core under shock or impact conditions. Moreover, it also lacks humidity control, light shielding and quick identification and management of the sample.

[0005] In summary, although the existing technology has made some progress in tree core storage and transportation, such as improving ventilation and shock absorption, enhancing storage order and portability, it still has the following limitations: lack of flexible fixation and protection means for individual tree cores, which makes it difficult to effectively prevent minor deformation or breakage during transportation; lack of humidity control and light protection functions for the storage environment, which cannot fully guarantee the long-term stability of the physical and chemical properties of the tree core; and lack of a convenient way for quick identification, management and retrieval of batch samples. These problems reduce the researchers' control over the quality and characteristic information of the tree core samples, affecting the reliability and repeatability of scientific research data. Therefore, the present application proposes a tree core storage device to effectively improve and enhance the flexibility of fixation, humidity control, light protection and information identification management. SUMMARY

[0006] The utility model discloses a tree core storage device for overcoming the defects of the prior art to solve the above problems.

[0007] The utility model discloses a tree core storage device, including the bottom plate, a plurality of sliding blocks are connected on the bottom plate, the piston is slidably connected in the sliding block, and one end of the piston penetrates the sliding block and is fixedly connected with the storage strip in the penetrating part, the top of storage strip is equipped with the recess for accommodating the core, and the bottom of recess is fixedly connected with bottom air bag, and the side wall of recess both ends is fixedly connected with side air bag, and the one end of piston is fixedly connected with spring between sliding block and storage strip, and the one end of storage strip is fixedly connected with the joint, and the joint is communicated with the inside of corresponding bottom air bag and side air bag through pipeline, and the joint is equipped with the gas filling and discharging mouth, and the one end of bottom plate is fixedly connected with the moisture absorption box, and the one end of bottom plate is fixedly connected with the baffle.

[0008] The one end of storage strip penetrates the bottom plate and baffle and extends to the outside of baffle, and the gap of 2-3cm is kept between the extension end of storage strip and baffle, so as to manually grab and draw out the storage strip, and the moisture absorption box is filled with moisture absorption material (such as silica gel), and the top of moisture absorption box is equipped with the moisture absorption mouth, and the moisture absorption mouth is communicated with the recess of storage strip.

[0009] The outer end of sliding block is equipped with the boss along its length direction, and the sliding groove is equipped with the boss on the corresponding position of bottom plate and sliding block, and the boss is slidably connected with the sliding groove, so as to guide the sliding position of sliding block.

[0010] The bottom air bag and side air bag are all circular arc structures, and the convex end of air bag is set to the direction away from the center of storage strip recess, and the one end of storage strip is equipped with the chamfer, and the recess that cooperates with the chamfer is equipped with the corresponding part of sliding block, so that the storage strip can be locked to a certain extent when the sliding block contacts with the storage strip, preventing the free rotation of storage strip.

[0011] The top of moisture absorption box is rotatably connected with the cover plate through the hinge near the position away from the bottom plate, and the bottom end of cover plate is in contact with the top end of bottom plate, and the one end of cover plate is equipped with the label slot corresponding to the top end position of storage strip, for placing the label card.

[0012] The top of cover plate is rotatably connected with the protective cover through the hinge near the one end of moisture absorption box, and the protective cover is made of non-light-transmitting material, and the cover plate is made of transparent material.

[0013] The outer end of bottom plate and protective cover away from the one end of moisture absorption box is sleeved with the end cover, and the sealing ring is fixedly connected in the end cover, and the bracket is rotatably connected with the bottom end of end cover, and the one end of bracket away from end cover is fixedly connected with the bottom end of bottom plate, for supporting end cover when the device is opened or used.

[0014] The utility model discloses a tree core storage device for overcoming the defects of the prior art to solve the above problems.

[0015] 1. The protection of the core is improved by setting the bottom air bag and the side air bag, and the air bag adopts a circular arc structure. When the air bag is inflated, the arc surface can uniformly distribute the contact pressure on the core, thereby achieving flexible support. This soft fixing method can effectively avoid the risk of stress concentration and deformation of the core during storage and transportation due to hard clamping, and reduce the possibility of breakage and deformation.

[0016] 2. Stable storage positioning is achieved. One end of the storage strip is provided with a chamfer, and the corresponding position of the sliding block is provided with a groove matched with the chamfer. The preliminary locking of the storage strip can be achieved through the engagement of the two, preventing the storage strip from rotating freely. This structure ensures that the core always maintains the required orientation and position during storage, improving the stability and positioning accuracy of the storage strip.

[0017] 3. Humidity control and quality assurance are enhanced. The desiccant box is filled with desiccant material and is connected with the inside of the storage strip groove, so that the humidity of the internal space can be maintained within a suitable range. The risk of quality changes caused by moisture or excessive drying of the core is reduced. Through effective humidity control, the physical and chemical properties of the core can be maintained stable for a long time, providing reliable sample conditions for subsequent research and testing.

[0018] 4. Information management and convenience of quick search. A label slot corresponding to the position of the storage strip is provided on the cover plate. By placing a label card in the label slot, the relevant information (such as collection date, location, tree species, number, etc.) of the core stored in each storage strip can be clearly identified. This visual information management method enables the operator to quickly retrieve specific samples, reducing human error and time waste.

[0019] 5. Light protection and long-term preservation. The use of light-proof protective cover can effectively prevent the core from being affected by ultraviolet and harmful light during long-term storage, preventing the chemical composition and color of the core from changing due to light exposure. This design allows the core to maintain its original quality and research value during long-term preservation.

[0020] 6. Simple and stable structure. The convex boss and sliding groove guide structure between the sliding block and the bottom plate helps the smooth movement of the storage strip during pushing in and pulling out, avoiding tilting and jamming. The use of end cap and support can stably support the entire device during operation, especially when storing or taking out a large number of cores, ensuring the stability and efficiency of the operation process.

[0021] 7. High visibility and easy observation. Through the transparent cover plate, the status of the internal core can be directly viewed without completely opening the storage system, which is convenient for daily inspection and sample management. When long-term preservation is required, the light protection state can be restored by easily flipping down the light-proof protective cover. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Overall exploded view of the utility model

[0023] Figure 2 Use state of the utility model Figure 1 ;

[0024] Figure 3 Use state of the utility model Figure 2 ;

[0025] Figure 4 Partial structure of the utility model Figure 1 ;

[0026] Figure 5 Use state of the utility model Figure 3 ;

[0027] Figure 6 Partial exploded view of the utility model

[0028] Figure 7 Side view of the utility model

[0029] Figure 8 A-A sectional view of the utility model Figure 7 ;

[0030] Figure 9 B-B sectional view of the utility model Figure 7 ;

[0031] Figure 10 Partial front view of the utility model

[0032] Figure 11 C-C sectional view of the utility model Figure 10 ;

[0033] Figure 12 D-D sectional view of the utility model Figure 10 ;

[0034] Figure 13 Appearance structure view of the utility model

[0035] Mark explanation in the drawing

[0036] 1, bottom plate; 2, sliding block; 3, piston; 4, storage strip; 5, bottom air bag; 6, side air bag; 7, spring; 8, joint; 9, moisture absorption box; 10, baffle; 11, cover plate; 12, label slot; 13, protective cover; 14, end cover; 15, support. Specific implementation

[0037] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0038] It should be noted that the directional concepts of "left", "right", "up", "down", "front", "back", "inner", and "outer" in the following scheme are all relative directions, and will not be listed one by one here.

[0039] Example 1:

[0040] like Figures 1 to 13 As shown, the tree core storage device provided in this embodiment mainly includes components such as a base plate 1, a slider 2, a piston 3, a storage strip 4, a bottom airbag 5, a side airbag 6, a spring 7, a connector 8, a moisture-absorbing box 9, and a baffle 10.

[0041] The base plate 1 is the basic support structure of this embodiment. Its material can be metal or high-strength engineering plastic to ensure that the device has good stability and durability during storage and transportation. The base plate 1 is provided with multiple sliding sliders 2. By arranging the sliders 2 on the base plate 1, multiple storage bars 4 can be arranged side by side, so as to store multiple tree cores at one time.

[0042] A piston 3 is slidably connected inside the slider 2. One end of the piston 3 passes through the slider 2 and is fixedly connected to the storage strip 4. When the user needs to load or remove the tree core, the piston 3 can be moved to slide inside the slider 2 by pulling or pushing the storage strip 4. To ensure the reset of the piston 3 and the smooth movement of the storage strip 4 during the storage and retrieval process, a spring 7 is fixedly connected between the piston 3 and the slider 2. The function of the spring 7 is to provide a certain elastic force after the storage strip 4 is pulled out or pushed in so that the storage strip 4 has a certain reset force when it is positioned.

[0043] Storage bar 4 is a storage unit specifically designed to hold tree cores. It has a groove at the top for placing the tree cores to be stored. A bottom airbag 5 is fixedly connected to the bottom of the groove, and side airbags 6 are fixedly connected to the side walls at both ends of the groove. These airbags are connected to corresponding pipes through connectors 8. Connectors 8 are equipped with inflation and deflation ports. Users can inflate or deflate the airbags by external inflation. By inflating the bottom airbag 5 and the side airbags 6, they expand and gently clamp the tree cores to prevent them from being damaged by vibration or compression during storage and transportation.

[0044] The bottom plate 1 is fixedly connected with a moisture absorption box 9 near one end of the sliding block 2, and the moisture absorption box 9 is filled with a moisture absorption material such as silica gel, which is used to adjust the relative humidity in the storage space. By opening a moisture absorption port on the top end of the moisture absorption box 9 and communicating with the groove of the storage strip 4, the moisture absorption material can absorb the moisture in the storage space, so as to maintain the appropriate relative humidity range and avoid the mold growth or quality reduction of the tree core due to damp.

[0045] The bottom plate 1 is fixedly connected with a moisture absorption box 9 near one end of the sliding block 2, and the moisture absorption box 9 is filled with a moisture absorption material such as silica gel, which is used to adjust the relative humidity in the storage space. By opening a moisture absorption port on the top end of the moisture absorption box 9 and communicating with the groove of the storage strip 4, the moisture absorption material can absorb the moisture in the storage space, so as to maintain the appropriate relative humidity range and avoid the mold growth or quality reduction of the tree core due to damp.

[0046] The outer end of the sliding block 2 is provided with a boss along the length direction, and the bottom plate 1 is provided with a sliding groove corresponding to the boss, so that the boss and the sliding groove are connected in a sliding manner to effectively guide the movement direction and position of the sliding block 2. The structure ensures the stability and linear motion precision of the storage strip 4 when being pushed in or pulled out, thereby avoiding the occurrence of inclination or jamming phenomenon.

[0047] Working process

[0048] When storing the tree core, first pull the storage strip 4 outward, so that the storage strip 4 extends outside the baffle 10, and the 2-3 cm gap between the extension end of the storage strip 4 and the baffle 10 is convenient for the operator to grasp.

[0049] Gently place the tree core to be stored into the groove at the top end of the storage strip 4, so that the tree core is located between the bottom air bag 5 and the side air bag 6.

[0050] Use the external inflation needle to inflate the bottom air bag 5 and the side air bag 6 through the inflation and deflation port on the connector 8, so that they are inflated and tightly adhere to the surface of the tree core, and the tree core is flexibly fixed and protected.

[0051] After the fixing is completed, the storage strip 4 is pushed into the bottom plate 1 along the sliding direction of the sliding block 2 until the groove part of the storage strip 4 enters the area acted on by the moisture absorption box 9, at this time the moisture absorption material will control the humidity in the internal air to ensure that the tree core maintains the appropriate humidity for a long time.

[0052] If it is necessary to check the tree core during storage, the storage strip 4 can be pulled out again at a proper position for checking, and if it is necessary to store for a long time, the storage strip 4 can be kept in the pushed-in state to ensure that the tree core is stably stored in the protection of the air bag and the moisture absorption environment.

[0053] The flexible fixing structure formed by the bottom air bag 5 and the side air bag 6 can effectively protect the integrity of the tree core. Compared with the traditional rigid clamp, the embodiment does not cause hard compression or stress concentration to the tree core, thereby reducing the risk of tree core breakage and deformation.

[0054] The hygroscopic material filled in the hygroscopic box 9 can ensure the relative constancy of humidity in the storage space, thereby reducing the quality changes of the tree core caused by dampness or excessive dryness, which helps to maintain the original structure and composition of the tree core and provides reliable guarantee for subsequent scientific analysis.

[0055] The sliding block 2 and the boss and sliding groove guiding connection with the bottom plate 1 are arranged, so that the storage strip 4 moves smoothly during pulling out and pushing in, and does not appear to be blocked or inclined, which is beneficial to improve the convenience of operation and the access efficiency.

[0056] The storage strip 4 passes through the baffle 10 and leaves a margin of 2-3 cm on the outside, which provides sufficient grabbing space for the operator to extract or put in the storage strip 4, improves the operation experience, and improves the efficiency of taking and placing the tree core.

[0057] Through the above structure and working process, the embodiment significantly improves the safety and operability of the tree core during storage, transportation and long-term preservation, while ensuring the stability of the physical properties and chemical properties of the tree core, providing a good foundation condition for subsequent scientific research and analysis work.

[0058] Embodiment 2:

[0059] As shown in Figures 1 to 13 the embodiment is improved and optimized on the basis of embodiment 1 as follows:

[0060] The bottom air bag 5 and the side air bag 6 are both circular arc structures, and the convex end of the air bag is arranged away from the center of the groove of the storage strip 4. This arc design makes the bottom air bag 5 and the side air bag 6 tightly adhere to the surface of the tree core after inflation, thereby realizing more flexible and uniform support and fixation. The arc design of the circular arc air bag can reduce the local pressure point, further reducing the risk of damage to the tree core.

[0061] At the same time, the end of the storage strip 4 close to the sliding block 2 is provided with a chamfer, and the sliding block 2 is provided with a groove corresponding to the chamfer. When the storage strip 4 is pushed into the sliding block 2, the engagement of the chamfer and the groove realizes the preliminary locking of the storage strip 4, preventing the free rotation of the storage strip 4 during use. This function is particularly important when multiple storage strips 4 are stored at the same time, which helps to ensure that each storage strip 4 maintains a stable orientation when carrying the tree core, thereby improving the protection degree and storage precision of the tree core.

[0062] A cover plate 11 is hingedly connected to the top of the moisture absorption box 9, and the bottom end of the cover plate 11 is in contact with the top end of the bottom plate 1. A label slot 12 is formed in the end of the cover plate 11 close to the baffle 10, and the label slot 12 corresponds to the top end of the storage strip 4. By placing a label card in the label slot 12, the tree core sample can be identified (such as recording the collection date, location, tree species and number of the tree core, etc.). This structure facilitates the management and quick search of the specified tree core, and reduces the time cost of the operator in information matching.

[0063] A protective cover 13 is hingedly connected to the top end of the end of the cover plate 11 close to the moisture absorption box 9. The protective cover 13 is made of light-tight material, and the cover plate 11 is made of transparent material. This configuration allows light to be isolated by closing the protective cover 13 during long-term storage, preventing the adverse effects of ultraviolet light and other light on the tree core lignin, thereby ensuring the stability of the color and composition of the tree core during storage. If temporary inspection of the tree core is required, the protective cover 13 can be opened, and the internal situation can be observed through the transparent cover plate 11 without directly exposing the tree core to the external environment.

[0064] An end cover 14 is provided on the outer end of the bottom plate 1 and the protective cover 13 away from the moisture absorption box 9. The end cover 14 is fixedly connected with a sealing ring inside. The bottom end of the end cover 14 is hingedly connected with a bracket 15. The end of the bracket 15 away from the end cover 14 is fixedly connected with the bottom end of the bottom plate 1. When the device is in an open state or during batch operation (such as batch storage and batch removal of tree cores), the end cover 14 can be supported by the bracket 15, thereby making the device more stable in the open state. When not in use, the end cover 14 can be closed to achieve better sealing and protection through the sealing ring.

[0065] Working process

[0066] Storage and viewing process:

[0067] The user first opens the end cover 14 and flips the protective cover 13 and the cover plate 11, thereby obtaining a storage space with an open top.

[0068] The tree core to be stored is gently placed between the bottom air bag 5 and the side air bag 6 along the groove of the storage strip 4. Since the bottom air bag 5 and the side air bag 6 are circular arc structures, when they are inflated, the air bags can gently and uniformly wrap and fix the tree core.

[0069] After inflating the air bags, the storage strip 4 is gently pushed into the appropriate position. The cooperation between the chamfer and the groove locks and stabilizes the storage strip 4 relative to the slider 2, which helps to maintain the desired orientation of the tree core.

[0070] When classifying the tree core, the corresponding label card can be inserted into the label slot 12 for subsequent quick search and management.

[0071] After storage is completed, close the cover plate 11 and the protective cover 13, then cover the end cover 14 and support it through the support 15 (if necessary) or directly close to form a sealed storage environment.

[0072] Removal and inspection process:

[0073] When a specific core needs to be removed, open the end cover 14 and the protective cover 13, flip the cover plate 11, and then check the label slot 12 for the target core.

[0074] Pull out the corresponding storage strip 4, deflate the air bag, and the core can be easily removed.

[0075] When removing the core or maintaining the internal structure, the support 15 can provide additional support when the end cover 14 is open to ensure the stability of the device during operation.

[0076] The design of the circular bottom air bag 5 and the side air bag 6 makes the air bag more evenly stressed when fixing the core, further reducing the local stress concentration on the core caused by traditional linear support.

[0077] The combination of chamfer and groove ensures that the storage strip 4 is firmly and stably positioned after loading the core, eliminating the problem of free rotation of the storage strip 4 and enhancing the overall stability and precision of the storage system.

[0078] The added cover plate 11 and label slot 12 improve management efficiency. By inserting a label card in the label slot 12, the operator can visually identify and classify the core, ensuring fast and accurate sample searching.

[0079] The protective cover 13 provides light protection, ensuring that the core is not affected by ultraviolet light and strong light during long-term storage, thereby maintaining the stability of the core color and chemical composition.

[0080] The addition of the end cover 14 and the support 15 makes the device more stable during use and opening, and when not in use, it achieves good sealing and protection performance through the sealing ring. In addition, when batch operation is required, the end cover 14 can be kept open through the support 15, allowing the operator to freely operate multiple storage strips 4 with both hands, greatly improving the operation efficiency.

[0081] Through the above structure and process, the embodiment further improves the flexibility and convenience of the device in core storage management based on embodiment 1, not only ensuring the integrity and quality of the core, but also optimizing the removal and placement process, information management, and environmental protection. It is a beneficial improvement and perfection of embodiment 1.

[0082] The above merely describes preferred embodiments of the present application, and it should be understood that the present application is not limited to the forms disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concepts described herein, by the above teachings or related art or knowledge, and any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the claims of the present application.

Claims

1. A device for storing tree cores, characterized in that, The utility model provides a kind of storage device, including bottom plate (1), the plurality of sliding blocks (2) are slidably connected on the bottom plate (1), the piston (3) is slidably connected in the sliding block (2), the piston (3) one end penetrates sliding block (2) and penetrates portion fixedly connected with storage strip (4), the recess for accommodating tree core is set in the top end of the storage strip (4), and recess bottom is fixedly connected with bottom air bag (5), the recess both ends side wall are fixedly connected with side air bag (6), the spring (7) is fixedly connected between the piston (3) one end close to storage strip (4) and sliding block (2), the one end of the storage strip (4) away from sliding block (2) is fixedly connected with connector (8), the connector (8) is communicated with the inside of corresponding bottom air bag (5) and side air bag (6) by pipeline, and the connector (8) is equipped with gas filling and discharging mouth;The one end of the bottom plate (1) close to sliding block (2) is fixedly connected with moisture absorption box (9), and the one end of bottom plate (1) away from moisture absorption box (9) is fixedly connected with baffle (10).

2. A tree core storage device for a tree according to claim 1, wherein: The one end of the storage strip (4) away from moisture absorption box (9) penetrates bottom plate (1) and baffle (10) and extends to baffle (10) outside, and the gap of 2-3 centimeters is kept between the extension end of storage strip (4) and baffle (10), so as to manually grab and draw out storage strip (4);The moisture absorption box (9) is filled with moisture absorption material, and the moisture absorption port is set in the top end of moisture absorption box (9), and the moisture absorption port is communicated with the recess of storage strip (4).

3. A tree core storage device for a tree according to claim 1, wherein: The outer end of the sliding block (2) is provided with a boss along the length direction, and the bottom plate (1) is provided with a sliding groove at the corresponding position of the boss on the sliding block (2), the boss and the sliding groove are slidably connected, and the sliding position of the sliding block (2) is guided.

4. A tree core storage device for a tree according to claim 1, wherein: The bottom air bag (5) and the side air bag (6) are both circular arc structures, and the convex end of the air bag is arranged away from the center of the recess of the storage strip (4);The one end of the storage strip (4) close to the sliding block (2) is provided with a chamfer, and the corresponding part of the sliding block (2) is provided with a groove matched with the chamfer, so that the storage strip (4) can be locked to a certain extent when the sliding block (2) is in contact with the storage strip (4), to prevent the storage strip (4) from rotating freely.

5. A tree core storage device for a tree according to claim 1, wherein: The top end of the moisture absorption box (9) close to the position away from the bottom plate (1) is rotatably connected with a cover plate (11) through a hinge, and the bottom end of the cover plate (11) is in contact with the top end of the bottom plate (1);The one end of the cover plate (11) close to the baffle (10) is provided with a label slot (12) corresponding to the top end position of the storage strip (4), for placing a label card.

6. A tree core storage device for a tree according to claim 5, wherein: The top end of the one end of the cover plate (11) close to the moisture absorption box (9) is rotatably connected with a protective cover (13) through a hinge, the protective cover (13) is made of non-light-transmitting material, and the cover plate (11) is made of transparent material.

7. A tree core storage device for a tree according to claim 6, wherein: The outer end of the bottom plate (1) and the protective cover (13) away from the moisture absorption box (9) is sleeved with an end cover (14), the end cover (14) is fixedly connected with a sealing ring in the inside, the bottom end of the end cover (14) is rotatably connected with a support (15), the one end of the support (15) away from the end cover (14) is fixedly connected with the bottom end of the bottom plate (1), for supporting the end cover (14) when the device is opened or used.

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