A dry-wet dual environment cement-based material testing device

Abstract

The application discloses a water storage assembly, a nozzle, a limiting piece and a cover plate, supporting legs symmetrically arranged are fixed to the bottom of a box body, a control assembly is installed on the top of the box body, a heating lamp is installed on the inner top of the box body, the heating lamp is electrically connected with the control assembly, the water storage assembly is installed on the top of the box body, the water storage assembly is electrically connected with the control assembly, symmetrically arranged nozzles are installed on the inner top of the box body, the nozzles are communicated with the water storage assembly, symmetrically arranged limiting pieces are fixed to the inner top of the box body through bolts, and the cover plate is placed between the symmetrically arranged limiting pieces in a sliding mode, the cover plate is used for separating the box body and testing cement-based materials in dry and wet environments. The application can simultaneously construct dry and wet test scenes in the same device, meets the performance test requirements of cement-based materials in different environments, does not need to additionally equip multiple test devices, reduces test cost and space occupation, and improves test efficiency.

Description

Technical Field

[0001] This invention relates to the field of cement-based material testing technology, and specifically to a dry and wet dual-environment cement-based material testing device. Background Technology

[0002] In the field of cement-based material performance testing, existing technologies for testing the performance of materials under dry and wet environments typically require the use of two independent testing devices. One device is specifically designed to simulate a dry environment, using built-in heating elements to raise the temperature and lower the humidity to achieve the testing conditions. The other device is used to create a humid environment, relying on water storage and spray structures to provide a humid testing scenario for the materials. During use, operators must first place the cement-based material samples to be tested in the two different devices, then adjust the environmental parameters of each device separately. Once the parameters are stable, synchronous timing testing is performed. During the testing process, the environmental status of both devices must be monitored to ensure that the testing conditions meet the requirements.

[0003] However, this traditional testing method has significant shortcomings. First, it requires two independent testing devices, increasing both the purchase cost and laboratory space, making it less suitable for space-constrained testing scenarios. Second, it's difficult to achieve completely synchronized control of the environmental parameters of the two devices. Differences in parameters such as temperature in the dry environment and humidity in the humid environment can lead to inconsistent testing conditions, affecting the accuracy of comparing test results under dry and wet conditions. Third, the testing process requires separate operation and monitoring of both devices, which is cumbersome, increases the workload of staff, and cannot guarantee the stability of the testing environment within both devices in real time, making it susceptible to external interference. Fourth, traditional devices lack effective spatial separation and sealing structures. Attempting to separate dry and wet areas within a single device can easily lead to moisture leakage or increased humidity in the dry area, failing to achieve truly simultaneous testing in both dry and wet environments. Fifth, the existing equipment has a relatively simple function, which can only meet the single drying or wetting test requirements. When it is necessary to switch the test type, the equipment must be replaced or the equipment parameters must be significantly adjusted. The operation is inconvenient and the testing efficiency is low. At the same time, it lacks consideration for details such as water volume monitoring and component storage during the test, which further affects the convenience and reliability of the test. Summary of the Invention

[0004] This invention aims to solve the problems of high cost, large space occupation, inconsistent testing conditions, cumbersome operation, poor sealing and limited functions of existing dry and wet environment testing devices for cement-based materials. It provides a dry and wet dual environment testing device for cement-based materials. This device can simultaneously construct two testing environments, dry and wet, in the same chamber. It has the characteristics of good sealing performance, convenient operation, multiple functions, high testing efficiency and accurate results.

[0005] The technical solution provided by this invention to solve the above problems is as follows: a dry and wet dual-environment cement-based material testing device, comprising a housing, legs, a control component, a heating lamp, a water storage component, nozzles, limiting components, and a sleeve plate. Symmetrically arranged legs are fixed to the bottom of the housing. The control component is installed on the top of the housing. The heating lamp is installed on the top of the housing and electrically connected to the control component. The water storage component is installed on the top of the housing and electrically connected to the control component. Symmetrically arranged nozzles are installed on the top of the housing and communicate with the water storage component. Symmetrically arranged limiting components are fixed to the top of the housing by bolts. A sleeve plate is slidably placed between the symmetrically arranged limiting components, and the sleeve plate is used to divide the housing for dry and wet dual-environment testing of cement-based materials. The device also includes a cover plate assembly and a blocking assembly. The cover plate assembly is used to close the housing, and the blocking assembly is used to divide the housing.

[0006] More preferably, the cover assembly includes a rotating plate, a locking block, and a locking groove. The rotating plate is rotatably connected to the side of the box body, the symmetrically arranged locking blocks are fixed to the side of the rotating plate, and the symmetrically arranged locking grooves are fixed to the top of the box body, with the locking grooves cooperating with the locking blocks.

[0007] More preferably, the blocking assembly includes a sliding plate, an elastic element, and a first spring. The sliding plate is slidably connected to the sleeve, the symmetrically arranged elastic elements are fixed to the lower part of the sliding plate, and a plurality of first springs are connected between the top of the sliding plate and the top of the sleeve.

[0008] More preferably, the elastic element is cylindrical in shape.

[0009] More preferably, it also includes a guide frame, a ventilation component, a pin bracket, and a second spring. The symmetrically arranged guide frames are fixed to the side of the housing. The ventilation component is slidably connected between the symmetrically arranged guide frames. The pin bracket is slidably connected to the ventilation component. A second spring connects the pin bracket and the ventilation component.

[0010] More preferably, the side of the enclosure has a socket that mates with the pin holder, and the enclosure has a large through slot. The ventilation component blocks the large through slot. When in use, the ventilation component is moved down so that it aligns with the large through slot, allowing air to circulate inside the enclosure.

[0011] More preferably, it also includes L-shaped parts, connecting rods, pressure blocks, and torsion springs. Several L-shaped parts are rotatably connected inside the sleeve plate, and symmetrically arranged connecting rods are rotatably connected between several L-shaped parts. Each L-shaped part is rotatably connected to a pressure block at its end, and each pressure block is connected to a corresponding L-shaped part by a symmetrically arranged torsion spring. The elastic coefficient of the torsion spring is greater than that of the first spring.

[0012] More preferably, the rotating plate rotates and presses the L-shaped part. The L-shaped part drives another L-shaped part to rotate through the connecting rod, which in turn drives the pressure block to move downward and press the sliding plate down. The bottom of the elastic part is lower than the bottom of the sliding plate. The sliding plate descends and drives the elastic part down. The elastic part first contacts the bottom of the box. As the sliding plate continues to descend, the elastic part is pushed outward, thereby enhancing the sealing of the box partition.

[0013] More preferably, it also includes a mounting ring and a sponge block. The mounting ring is fixed to the rotating plate, and the sponge block is installed inside the mounting ring. The sponge absorbs excess water, and the water absorption state of the sponge can be observed to determine the water level inside the tank, which is convenient for timely handling.

[0014] More preferably, it also includes a placement seat, which is bolted to the side of the box and is used to engage the removed sleeve.

[0015] Compared with the prior art, the advantages of the present invention are: the present invention can simultaneously construct two different test scenarios, dry and wet, in the same device, to meet the performance testing needs of cement-based materials in different environments, without the need to equip multiple additional test devices, thereby reducing test costs and space occupation and improving test efficiency.

[0016] The cover assembly enables effective closure of the chamber, preventing external air and humidity from interfering with the internal testing environment, ensuring the stability of testing conditions, and thus improving the accuracy of test results. With the cooperation of the blocking assembly and related linkage structure, the sealing of the chamber partition can be enhanced, preventing the mutual influence of dry and wet environments, and further ensuring the reliability of test data.

[0017] The sponge block can absorb excess moisture in a humid environment, preventing moisture accumulation from affecting the testing status of cement-based materials. At the same time, staff can visually judge the water level inside the chamber by observing the water absorption status of the sponge block, which facilitates timely handling and ensures stable parameters in a humid environment.

[0018] The sleeve is detachable and snaps onto the placement base, which not only prevents the sleeve from being damaged or lost due to random placement, but also allows for flexible adjustment of the internal space of the chamber according to testing needs. When only a drying test is performed, a complete space can be formed, which is conducive to creating a uniform drying environment.

[0019] By combining the ventilation components with the large ventilation slots, airflow can be achieved inside the chamber. Combined with the heating lamps, this accelerates the evaporation of internal moisture, allowing a dry environment to be formed quickly and with uniform temperature distribution, thus improving the efficiency and accuracy of drying tests. Attached Figure Description

[0020] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the first partial three-dimensional structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the second partial three-dimensional structure of the present invention.

[0024] Figure 4 This is a schematic diagram of a partial cross-sectional three-dimensional structure of the present invention.

[0025] Figure 5 This is a schematic diagram of a second partial cross-sectional three-dimensional structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the third partial cross-sectional three-dimensional structure of the present invention.

[0027] Figure 7 This is a schematic diagram of the fourth partial cross-sectional three-dimensional structure of the present invention.

[0028] Figure 8 This is a schematic diagram of the fifth partial cross-sectional three-dimensional structure of the present invention.

[0029] Figure 9 This is a schematic diagram of the third part of the three-dimensional structure of the present invention.

[0030] Figure 10 This is a schematic diagram of the sixth partial cross-sectional three-dimensional structure of the present invention.

[0031] Attached diagram labels: 1. Housing; 2. Support leg; 3. Control component; 4. Heating lamp; 5. Water storage component; 6. Nozzle; 7. Cover plate component; 71. Rotating plate; 72. Locking block; 73. Locking groove; 8. Limiting component; 9. Sleeve plate; 10. Blocking component; 101. Sliding plate; 102. Elastic component; 11. Spring; 12. Guide frame; 13. Ventilation component; 14. Pin frame; 15. Spring; 16. L-shaped component; 17. Connecting rod; 18. Pressure block; 19. Torsion spring; 20. Mounting ring; 21. Sponge block; 22. Placement seat. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. In this description, it should be noted that the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the present invention. They are merely used to distinguish components or operations described using the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. The term "comprising" and any variations thereof in the specification, claims, and accompanying drawings are intended to cover non-exclusive inclusion.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Furthermore, in the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., 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 invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Example 1: As shown in the attached figure, a dry and wet dual-environment cement-based material testing device includes a housing 1, support legs 2, a control component 3, a heating lamp 4, a water storage component 5, a nozzle 6, limiting components 8, and a sleeve 9. The symmetrically arranged support legs 2 are fixed to the bottom of the housing 1. The control component 3 is installed on the top of the housing 1. The heating lamp 4 is installed on the top inside the housing 1 and is electrically connected to the control component 3. The water storage component 5 is installed on the top of the housing 1 and is electrically connected to the control component 3. The symmetrically arranged nozzle 6 is installed on the top inside the housing 1 and is connected to the water storage component 5. The symmetrically arranged limiting components 8 are fixed to the top inside the housing 1 by bolts. The sleeve 9 is slidably placed between the symmetrically arranged limiting components 8. The sleeve 9 is used to separate the housing 1 for dry and wet dual-environment testing of cement-based materials. It also includes a cover plate component 7 and a blocking component 10. The cover plate component 7 is used to close the housing 1, and the blocking component 10 is used to separate the housing 1.

[0036] In this embodiment, specifically, the cover plate assembly 7 includes a rotating plate 71, a locking block 72, and a locking groove 73. The rotating plate 71 is rotatably connected to the side of the housing 1. The symmetrically arranged locking blocks 72 are fixed to the side of the rotating plate 71, and the symmetrically arranged locking grooves 73 are fixed to the top of the housing 1, with the locking grooves 73 engaging with the locking blocks 72. Further, the blocking assembly 10 includes a sliding plate 101, an elastic element 102, and a first spring 11. The sliding plate 101 is slidably connected inside the sleeve 9. The symmetrically arranged elastic elements 102 are fixed to the lower part of the sliding plate 101. The outer part of the elastic element 102 is cylindrical, and a plurality of first springs 11 are connected between the top of the sliding plate 101 and the inner top of the sleeve 9.

[0037] When conducting dry and wet dual-environment testing of cement-based materials, the sleeve plate 9 is first slidably placed between the symmetrically arranged limiting pieces 8 to initially divide the internal space of the chamber 1, providing a basis for the subsequent formation of two independent testing environments. This allows the dry and wet tests to be carried out simultaneously within the same device, improving testing efficiency. Next, the cement-based material to be tested is placed into the two areas of the chamber 1 separated by the sleeve plate 9. Then, the rotating plate 71 is held and rotated towards the top of the chamber 1. The rotating plate 71 drives the side-fixed locking block 72 to rotate synchronously until the locking block 72 precisely engages with the locking groove 73 on the top of the chamber 1. This operation closes the chamber 1, preventing external air, humidity, and other factors from interfering with the internal testing environment, ensuring the stability of the testing conditions, and thus improving the accuracy of the test results. Finally, by operating the control component 3 on the top of the chamber 1, the heating lamp 4 and the water storage component 5 are activated. The heating lamp 4 can heat one area to quickly create a dry test environment. The water in the water storage component 5 will be evenly sprayed out through the symmetrically arranged nozzles 6 connected to it, providing a continuous humid environment for the other area. In this way, two different test scenarios, dry and wet, can be constructed simultaneously in the same chamber 1 to meet the performance testing needs of cement-based materials under different environments. There is no need to equip multiple test devices, which reduces test costs and space occupation.

[0038] Example 2: Based on Example 1, as shown in the attached figure, it further includes a guide frame 12, a ventilation component 13, a pin bracket 14, and a second spring 15. The symmetrically arranged guide frames 12 are fixed to the side of the housing 1. The ventilation component 13 is slidably connected between the symmetrically arranged guide frames 12. The pin bracket 14 is slidably connected to the ventilation component 13. The side of the housing 1 has a socket that mates with the pin bracket 14. The second spring 15 connects the pin bracket 14 and the ventilation component 13. The housing 1 has a large through slot. The ventilation component 13 blocks the large through slot. In use, the ventilation component 13 is moved downward so that it aligns with the large through slot, allowing air to circulate inside the housing 1. Furthermore, it also includes L-shaped parts 16, connecting rods 17, pressure blocks 18, and torsion springs 19. Several L-shaped parts 16 are rotatably connected to the sleeve plate 9. The symmetrically arranged connecting rods 17 are rotatably connected between several L-shaped parts 16. Each L-shaped part 16 is rotatably connected to a pressure block 18 at its end. Each pressure block 18 is connected to a symmetrically arranged torsion spring 19 between itself and the corresponding L-shaped part 16. The elastic coefficient of the torsion spring 19 is greater than that of the first spring 11. The rotating plate 71 rotates and presses the L-shaped parts 16. The L-shaped parts 16 drive another L-shaped part 16 to rotate through the connecting rod 17, which in turn drives the pressure block 18 to move downward and press the sliding plate 101 to descend. The bottom of the elastic element 102 is lower than the bottom of the sliding plate 101. The descent of the sliding plate 101 drives the elastic element 102 to descend. The elastic element 102 first contacts the bottom of the box 1. As the sliding plate 101 continues to descend, the elastic element 102 is pushed outward, thereby strengthening the sealing of the box 1. Secondly, it also includes a mounting ring 20 and a sponge block 21. The mounting ring 20 is fixed to the rotating plate 71, and the sponge block 21 is installed inside the mounting ring 20. The sponge absorbs excess water, and the water absorption state of the sponge can be observed to determine the water level inside the chamber 1 for timely handling. Thirdly, it also includes a placement seat 22, which is bolted to the side of the chamber 1. The placement seat 22 is used to engage the removed sleeve plate 9. When simultaneous dry and wet testing is required, the sleeve plate 9 is placed on the limiting member 8. When only dry testing is needed, the sleeve plate 9 can be removed and placed on the placement seat 22, and then the ventilation assembly 13 can be lowered to allow hot air to circulate inside the chamber 1.

[0039] When simultaneous testing in both dry and wet environments is required, first place the sleeve 9 between the limiting members 8 according to the operation in Example 1, and then rotate the rotating plate 71 to close it. During the rotation of the rotating plate 71, the L-shaped member 16 inside the sleeve 9 will be squeezed. Since several L-shaped members 16 are rotatably connected by symmetrically arranged connecting rods 17, the squeezed L-shaped member 16 will drive other L-shaped members 16 to rotate synchronously through the connecting rods 17, thereby driving the pressure block 18 rotatably connected to the end of each L-shaped member 16 to move downward. The pressure block 18 will squeeze the sliding plate 101 to make it descend. Since the symmetrically arranged torsion spring 19 connected between the pressure block 18 and the corresponding L-shaped member 16 has an elastic coefficient greater than that of the first spring 11, it can ensure that the pressure block 18 applies sufficient and stable pressure to the sliding plate 101, allowing the sliding plate 101 to descend smoothly, causing the elastic member 102 to make close contact with the bottom of the box 1 and fully open it, further enhancing the sealing of the box 1, avoiding mutual influence between dry and wet environments, and making the test data more reliable. A sponge block 21 is installed inside the mounting ring 20 fixed to the rotating plate 71. During humid environment testing, the sponge block 21 can absorb excess water, preventing water accumulation from affecting the test status of the cement-based materials. At the same time, the staff can visually judge the water level inside the chamber 1 by observing the degree of water absorption and expansion or the humidity of the sponge block 21, which facilitates timely replenishment of water or drainage of excess water, ensuring the stability of humid environment parameters. When only a drying test is required, the sleeve 9 can be removed from between the limiting parts 8 and then snapped onto the placement seat 22 on the side of the chamber 1. This avoids damage or loss caused by random placement of the sleeve 9 and also creates a complete space inside the chamber 1, which is conducive to the heating lamp 4 creating a uniform drying environment. Then, pull the pin bracket 14. The pin bracket 14 will stretch the second spring 15 connected to the ventilation component 13 and disengage from the insertion hole on the side of the chamber 1. Then, move the ventilation component 13 downward along the symmetrically arranged guide frame 12 until the ventilation component 13 is aligned with the large through slot on the chamber 1. At this time, the inside of the chamber 1 is connected to the outside air, and the air can flow freely. With the heating effect of the heating lamp 4, the evaporation of moisture inside the chamber 1 can be accelerated, so that a dry environment is quickly formed and the temperature distribution is uniform, improving the efficiency and accuracy of the drying test. After the test is completed, move the ventilation component 13 upward to reset it. Then, release the pin bracket 14. Under the elastic reset action of the second spring 15, the pin bracket 14 will re-insert into the insertion hole on the side of the chamber 1, fixing the ventilation component 13 and making it cover the large through slot again, which is convenient for the storage of the device and its next use.

[0040] The above description only illustrates the preferred embodiments of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All modifications made within the scope of the independent claims of this invention are also within the scope of protection of this invention.

Claims

1. A testing device for cement-based materials in both dry and wet environments, comprising a housing (1), legs (2), a control component (3), a heating lamp (4), a water storage component (5), a nozzle (6), a limiting component (8), and a sleeve (9). The symmetrically arranged legs (2) are fixed to the bottom of the housing (1), the control component (3) is installed on the top of the housing (1), the heating lamp (4) is installed inside the top of the housing (1), and the heating lamp (4) is electrically connected to the control component (3). The water storage component (5) is installed... Installed on the top of the box (1), the water storage component (5) and the control component (3) are electrically connected. Symmetrically arranged nozzles (6) are installed on the top inside the box (1) and are connected to the water storage component (5). Symmetrically arranged limiting members (8) are fixed to the top inside the box (1) by bolts. Sleeves (9) are slidably placed between the symmetrically arranged limiting members (8). Sleeves (9) are used to divide the box (1). Dry and wet dual environment tests are performed on cement-based materials. The feature is that... It also includes a cover assembly (7) and a barrier assembly (10), the cover assembly (7) for closing the box (1) and the barrier assembly (10) for separating the box (1).

2. The testing device for cement-based materials in both dry and wet environments according to claim 1, characterized in that, The cover assembly (7) includes a rotating plate (71), a locking block (72) and a locking groove (73). The rotating plate (71) is rotatably connected to the side of the box (1). The symmetrically arranged locking blocks (72) are fixed to the side of the rotating plate (71). The symmetrically arranged locking grooves (73) are fixed to the top of the box (1). The locking grooves (73) cooperate with the locking blocks (72).

3. The testing device for cement-based materials in both dry and wet environments according to claim 1, characterized in that, The blocking assembly (10) includes a sliding plate (101), an elastic element (102) and a first spring (11). The sliding plate (101) is slidably connected to the sleeve (9). The symmetrically arranged elastic elements (102) are fixed to the lower part of the sliding plate (101). Several first springs (11) are connected between the top of the sliding plate (101) and the top of the sleeve (9).

4. The testing device for cement-based materials in both dry and wet environments according to claim 3, characterized in that, The elastic element (102) is cylindrical on the outside.

5. The testing device for cement-based materials in both dry and wet environments according to claim 1, characterized in that, It also includes a guide frame (12), a ventilation component (13), a pin bracket (14), and a second spring (15). The symmetrically arranged guide frames (12) are fixed to the side of the housing (1). The ventilation component (13) is slidably connected between the symmetrically arranged guide frames (12). The pin bracket (14) is slidably connected to the ventilation component (13). The second spring (15) is connected between the pin bracket (14) and the ventilation component (13).

6. The testing device for cement-based materials in both dry and wet environments according to claim 5, characterized in that, The side of the box (1) is provided with a socket that matches the pin bracket (14). The box (1) is provided with a large through slot. The ventilation component (13) blocks the large through slot. When in use, the ventilation component (13) is moved down so that the ventilation component (13) is aligned with the large through slot, so that the air inside the box (1) can flow.

7. The testing device for cement-based materials in both dry and wet environments according to claim 1, characterized in that, It also includes L-shaped parts (16), connecting rods (17), pressure blocks (18) and torsion springs (19). Several L-shaped parts (16) are rotatably connected to the sleeve plate (9). The symmetrically arranged connecting rods (17) are rotatably connected between several L-shaped parts (16). Each L-shaped part (16) is rotatably connected to a pressure block (18) at its end. Each pressure block (18) is connected to a corresponding L-shaped part (16) by a symmetrically arranged torsion spring (19). The elastic coefficient of the torsion spring (19) is greater than that of the first spring (11).

8. The testing device for cement-based materials in both dry and wet environments according to claim 7, characterized in that, The rotating plate (71) rotates and squeezes the L-shaped part (16). The L-shaped part (16) drives another L-shaped part (16) to rotate through the connecting rod (17), which in turn drives the pressure block (18) to move down and squeeze the sliding plate (101) to descend. The bottom of the elastic part (102) is lower than the bottom of the sliding plate (101). The sliding plate (101) descends and drives the elastic part (102) to descend. The elastic part (102) first contacts the bottom of the box (1). As the sliding plate (101) continues to descend, the elastic part (102) is pushed outward, thereby strengthening the sealing of the box (1).

9. The testing device for cement-based materials in both dry and wet environments according to claim 2, characterized in that, It also includes an installation ring (20) and a sponge block (21). The installation ring (20) is fixed to the rotating plate (71), and the sponge block (21) is installed inside the installation ring (20). The sponge absorbs excess water, and the water absorption state of the sponge can be observed to determine the water volume inside the box (1) for timely treatment.

10. A testing device for cement-based materials in both dry and wet environments according to claim 1, characterized in that, It also includes a placement seat (22), which is fixed to the side of the box (1) by bolts. The placement seat (22) is used to snap on the sleeve (9) to be removed.

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