Connecting structure for radiation protection shed

Abstract

The utility model relates to the technical field of connecting structures, and discloses a connecting structure for a radiation protection shed, which comprises a first mounting bracket, one side of the first mounting bracket is provided with a mounting groove, a third connecting plate is movably mounted in the mounting groove, one side of the third connecting plate is fixedly connected with a second mounting bracket, and the second mounting bracket is fixedly connected with a second connecting plate. And two fixing assemblies are installed on the other side of the third connecting plate in a mirror image mode, the two fixing assemblies are the same in structure, each fixing assembly comprises an installation sleeve, and the installation sleeves are fixedly connected to the outer side of the third connecting plate. According to the connecting structure for the radiation protection shed, through the arrangement of the first fixing plate and the second fixing plate, plates with different thicknesses can be conveniently connected and fixed, the connecting structure can be conveniently used, through the arrangement of the first pressing plate and the second pressing plate, the plates can be conveniently supported in different ranges, and the radiation protection shed is convenient to use. And various use requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of connection structures, in particular to a connection structure for radiation protection sheds. Background Art

[0002] Radiation protection shelters are usually required to provide adequate shielding in the structure to protect personnel or equipment from the effects of radiation. These shelters may be used in a variety of scenarios, such as nuclear power plants, radioactive material handling facilities, medical radiation departments or scientific research sites.

[0003] Radiation protection sheds are usually built by connecting and fixing plates with radiation protection capabilities. Different radiation source intensities and types (such as X-rays, gamma rays, neutron radiation, etc.) require different degrees of protection. Generally, the higher the radiation intensity or the stronger the radiation type, the thicker the required protective material. The existing connection structure for radiation protection sheds is not convenient for connecting and fixing plates of different thicknesses. When fixing longer plates, it is necessary to increase the support range of the connection structure for better support. The existing connection structure is not convenient for adjusting the support range and strengthening the support of the plates. For this reason, a connection structure for radiation protection sheds is proposed. Utility Model Content

[0004] The main purpose of the utility model is to provide a connection structure for radiation protection sheds, which solves the problem that the existing connection structure for radiation protection sheds is not convenient for connecting and fixing plates of different thicknesses. When fixing longer plates, it is necessary to increase the support range of the connection structure for better support. The existing connection structure is not convenient for adjusting the support range and strengthening the support for the plates.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A connection structure for a radiation protection shed comprises a first mounting bracket, a mounting groove is provided on one side of the first mounting bracket, a third connecting plate is movably installed in the mounting groove, a second mounting bracket is fixedly connected to one side of the third connecting plate, two fixing components are mirror-mounted on the other side of the third connecting plate, and the two fixing components have the same structure, the fixing component comprises a mounting sleeve, the mounting sleeve is fixedly connected to the outer side of the third connecting plate, a rotating shaft is movably installed in the mounting sleeve, a first movable groove is provided on one side of the mounting sleeve, a first fixing plate is fixedly connected to one side of the rotating shaft, one end of the first fixing plate passes through the first movable groove, the first connecting plate is fixedly connected to the outer side of the first mounting bracket, a plurality of first fixing holes are equidistantly provided on one side of the first connecting plate, one end of the first fixing plate passes through an adjacent first fixing hole, a second movable groove is provided on one side of the mounting sleeve, a second fixing plate is fixedly connected to one side of the rotating shaft, one end of the second fixing plate passes through the second movable groove, the second connecting plate is fixedly connected to the outer side of the first mounting bracket, a plurality of second fixing holes are equidistantly provided on one side of the second connecting plate, and one end of the second fixing plate passes through an adjacent second fixing hole.

[0007] Furthermore, a first rotating handle is fixedly connected to the outer side of the rotating shaft, a first fixing bolt is threadedly connected to one side of the first rotating handle, two fixing blocks are equidistantly fixedly connected to the outer side of the mounting sleeve, and the lower end of the first fixing bolt is fixedly installed in an adjacent fixing block.

[0008] Furthermore, the second mounting bracket and the first mounting bracket are both in contact with the plate body on both sides of the middle.

[0009] Furthermore, a mounting box is fixedly connected to the outer side of the second mounting bracket, a mounting hole is opened on the upper side of the mounting box, a first connecting rod is movably installed in the mounting hole, a second rotating handle is fixedly connected to one end of the outer side of the first connecting rod, a plurality of first connecting holes are equidistantly opened on the outer side of the second rotating handle, a second connecting hole is opened on the outer side of the mounting box, a second fixing bolt is threadedly connected in the second connecting hole, and one end of the second fixing bolt is threadedly connected in the adjacent second connecting hole.

[0010] Furthermore, one end of the inner side of the first connecting rod is fixedly connected with a first transmission gear, and the inner side of the first transmission gear is equidistantly toothed with four first tooth plates, and one side of the mounting box is equidistantly provided with four first connecting grooves, and the four first tooth plates pass through the four first connecting grooves respectively, and the outer sides of the four first tooth plates are fixedly connected with a first pressure plate, and the inner side of the first pressure plate abuts against an adjacent plate body.

[0011] Furthermore, a second connecting rod is fixedly connected to one side of the first transmission gear, a first limiting base is movably sleeved on the outer side of one end of the second connecting rod, one side of the first limiting base is fixedly connected to the inner wall of the installation box, a first ratchet is fixedly sleeved on the outer side of the second connecting rod, a chain is connected to the outer teeth of the first ratchet, a second ratchet is connected to the inner teeth of the chain, a third connecting rod is fixedly sleeved on the inner side of the second ratchet, a second limiting base is movably sleeved on the outer side of one end of the third connecting rod, and one side of the second limiting base is fixedly connected to the inner wall of the installation box.

[0012] Furthermore, a second transmission gear is fixedly connected to one side of the third connecting rod, four second tooth plates are equidistantly toothed on one side of the second transmission gear, four second connecting grooves are equidistantly opened on one side of the installation box, the four second tooth plates pass through the four second connecting grooves respectively, a second pressure plate is fixedly connected to the outer sides of the four second tooth plates, a fourth connecting rod is fixedly connected to one side of the second transmission gear, a third limiting base is movably sleeved on the outer side of one end of the fourth connecting rod, one side of the third limiting base is fixedly connected to the inner wall of the installation box, and one side of the second pressure plate abuts against an adjacent plate body.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model facilitates the connection and fixation of plates of different thicknesses by providing the first fixing plate and the second fixing plate, and facilitates the use of the connecting structure. By rotating the rotating shaft, the rotating shaft drives the first fixing plate and the second fixing plate to rotate until they are no longer movable in the first fixing hole and the second fixing hole respectively. At this time, the second mounting bracket can be pulled to adjust the distance between the second mounting bracket and the first mounting bracket, and then the mounting plate body can be fixed between the second mounting bracket and the first mounting bracket. Through such a setting, it is convenient to connect and fix plates of different thicknesses, and facilitate the use of the connecting structure.

[0015] 2. The utility model provides a first pressure plate and a second pressure plate, which facilitates the support of the plate in different ranges and meets various usage requirements. By rotating the first transmission gear, the first transmission gear drives the first pressure plate to move outward through the first tooth plate, so that the first pressure plate supports the plate body in a larger range. At the same time, the first transmission gear drives the second transmission gear to move through the first ratchet, the chain and the second ratchet, and the second transmission gear drives the second pressure plate to move outward through the second tooth plate, so that the second pressure plate supports the plate body in a larger range. Through such a setting, it is convenient to support the plate in different ranges and meets various usage requirements.

[0016] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure from a first angle of a connection structure for a radiation protection shed according to the utility model.

[0018] Figure 2 This is a schematic diagram of the overall structure from a second angle of a connection structure for a radiation protection shed according to the utility model.

[0019] Figure 3 It is a partial structural schematic diagram of a first mounting bracket of a connection structure for a radiation protection shed according to the utility model.

[0020] Figure 4 It is a partial structural schematic diagram of a second mounting bracket of a connection structure for a radiation protection shed according to the utility model.

[0021] Figure 5 It is a partial structural schematic diagram of a mounting groove of a connection structure for a radiation protection shed according to the utility model.

[0022] Figure 6 It is a partial structural schematic diagram of a fixing block of a connection structure for a radiation protection shed according to the utility model.

[0023] Figure 7 It is a partial structural schematic diagram of a first fixing plate of a connection structure for a radiation protection shed according to the utility model.

[0024] Figure 8 It is a partial structural schematic diagram of a first transmission gear of a connection structure for a radiation protection shed according to the utility model.

[0025] In the figure: 1. plate body; 2. first mounting bracket; 3. first connecting plate; 4. second connecting plate; 5. mounting groove; 6. third connecting plate; 7. rotating shaft; 8. mounting sleeve; 9. first rotating handle; 10. first fixing bolt; 11. fixing block; 12. first fixing plate; 13. first fixing hole; 14. second fixing plate; 15. second fixing hole; 16. second mounting bracket; 17. mounting box; 18. second rotating handle; 19. second fixing bolt; 20. first transmission gear; 21. first tooth plate; 22. first pressure plate; 23. first ratchet; 24. chain; 25. second ratchet; 26. second transmission gear; 27. second tooth plate; 28. second pressure plate. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] like Figure 1-Figure 7As shown, a connection structure for a radiation protection shed includes a first mounting bracket 2, characterized in that: a mounting groove 5 is opened on one side of the first mounting bracket 2, a third connecting plate 6 is movably installed in the mounting groove 5, a second mounting bracket 16 is fixedly connected to one side of the third connecting plate 6, and two fixing components are mirror-mounted on the other side of the third connecting plate 6, and the two fixing components have the same structure, and the fixing component includes a mounting sleeve 8, the mounting sleeve 8 is fixedly connected to the outer side of the third connecting plate 6, a rotating shaft 7 is movably installed in the mounting sleeve 8, a first movable groove is opened on one side of the mounting sleeve 8, a first fixing plate 12 is fixedly connected to one side of the rotating shaft 7, one end of the first fixing plate 12 passes through the first movable groove, a first connecting plate 3 is fixedly connected to the outer side of the first mounting bracket 2, a plurality of first fixing holes 13 are opened on one side of the first connecting plate 3 at equal intervals, and one end of the first fixing plate 12 passes through the adjacent first fixing hole 1 3. A second movable groove is provided on one side of the mounting sleeve 8, a second fixing plate 14 is fixedly connected to one side of the rotating shaft 7, one end of the second fixing plate 14 passes through the second movable groove, a second connecting plate 4 is fixedly connected to the outer side of the first mounting bracket 2, a plurality of second fixing holes 15 are equidistantly provided on one side of the second connecting plate 4, one end of the second fixing plate 14 passes through the adjacent second fixing hole 15, through the above technical scheme, by rotating the rotating shaft 7, the rotating shaft 7 drives the first fixing plate 12 and the second fixing plate 14 to rotate until they are no longer movable in the first fixing hole 13 and the second fixing hole 15 respectively, at this time, the second mounting bracket 16 can be pulled to adjust the distance between the second mounting bracket 16 and the first mounting bracket 2, and then the mounting plate body 1 can be fixedly mounted between the second mounting bracket 16 and the first mounting bracket 2, through such a setting, it is convenient to connect and fix plates of different thicknesses, and it is convenient to use the connecting structure;

[0028] When the first fixing plate 12 and the second fixing plate 14 move in the first fixing hole 13 and the second fixing hole 15 respectively, the first connecting plate 3 and the second connecting plate 4 can limit the movement of the first fixing plate 12 and the second fixing plate 14, and the first fixing plate 12 and the second fixing plate 14 further limit the movement of the mounting sleeve 8, and the mounting sleeve 8 clamps and fixes the plate through the movement of the limit 16.

[0029] like Figure 1-Figure 7As shown, a first rotating handle 9 is fixedly connected to the outer side of the rotating shaft 7, and a first fixing bolt 10 is threadedly connected to one side of the first rotating handle 9. Two fixing blocks 11 are equidistantly fixedly connected to the outer side of the mounting sleeve 8, and the lower end of the first fixing bolt 10 is fixedly installed in an adjacent fixing block 11. Through the above technical solution, screw slots for fixing the first fixing bolt 10 are opened on the two fixing blocks 11, one is used to fix the first rotating handle 9 when the first fixing plate 12 and the second fixing plate 14 are respectively movable in the first fixing hole 13 and the second fixing hole 15, and the other is used to fix the first rotating handle 9 when the first fixing plate 12 and the second fixing plate 14 are not respectively movable in the first fixing hole 13 and the second fixing hole 15.

[0030] like Figure 1-Figure 4 As shown, the second mounting bracket 16 and the first mounting bracket 2 are both in contact with the plate body 1 on both sides in the middle. Through the above technical solution, sealing strips are installed on the inner sides of the second mounting bracket 16 and the first mounting bracket 2, which can enhance the friction between the second mounting bracket 16 and the first mounting bracket 2 and the plate body 1, and at the same time seal the edge seams of the plate body 1 to reduce pollution leakage.

[0031] like Figure 1-Figure 8 As shown, a mounting box 17 is fixedly connected to the outer side of the second mounting bracket 16, a mounting hole is opened on the upper side of the mounting box 17, a first connecting rod is movably installed in the mounting hole, a second rotating handle 18 is fixedly connected to one end of the outer side of the first connecting rod, a plurality of first connecting holes are equidistantly opened on the outer side of the second rotating handle 18, a second connecting hole is opened on the outer side of the mounting box 17, a second fixing bolt 19 is threadedly connected in the second connecting hole, and one end of the second fixing bolt 19 is threadedly connected in the adjacent second connecting hole. Through the above technical scheme, the multiple first connecting holes opened on the second rotating handle 18 enable the second rotating handle 18 to be fixed by the second fixing bolt 19 and the second connecting hole when it is rotated to different degrees.

[0032] like Figure 1-Figure 8As shown, one end of the inner side of the first connecting rod is fixedly connected with the first transmission gear 20, and the inner side of the first transmission gear 20 is equidistantly toothed with four first tooth plates 21, and one side of the mounting box 17 is equidistantly provided with four first connecting grooves, and the four first tooth plates 21 pass through the four first connecting grooves respectively, and the outer sides of the four first tooth plates 21 are fixedly connected with the first pressing plates 22, and the inner sides of the first pressing plates 22 abut against an adjacent plate body 1. Through the above technical scheme, the mounting box 17 is provided with a limiting mechanism on the side of the first connecting groove, which can limit the movement distance of the first tooth plate 21, so that the first tooth plate 21 keeps moving in the direction of tooth connection with the first transmission gear 20, and at the same time, the limiting mechanism can limit the first tooth plate 21 from completely disengaging from the first transmission gear 20 during movement, and at the same time, the limiting mechanism can limit the first tooth plate 21 from interfering with the second transmission gear 26 during movement;

[0033] A screw fixing mechanism is also installed on the inner side of the first pressing plate 22 , which can be fixed to the plate body 1 with screws after the position is adjusted to press the plate body 1 , thereby enhancing the fixing effect.

[0034] like Figure 1-Figure 8 As shown, one side of the first transmission gear 20 is fixedly connected with the second connecting rod, the outer side of one end of the second connecting rod is movably sleeved with the first limiting base, one side of the first limiting base is fixedly connected to the inner wall of the installation box 17, the outer side of the second connecting rod is fixedly sleeved with the first ratchet 23, the outer side of the first ratchet 23 is toothed with a chain 24, the inner side of the chain 24 is toothed with the second ratchet 25, the inner side of the second ratchet 25 is fixedly sleeved with the third connecting rod, the outer side of one end of the third connecting rod is movably sleeved with the second limiting base, and one side of the second limiting base is fixedly connected to the inner wall of the installation box 17. Through the above technical solution, the first limiting base can limit the first transmission gear 20 through the second connecting rod, so that the first transmission gear 20 can rotate around itself as the axis without causing displacement in other directions;

[0035] The second limiting base can limit the second transmission gear 26 through the third connecting rod, so that the second transmission gear 26 can rotate around itself as the axis without causing displacement in other directions.

[0036] like Figure 1-Figure 8As shown, a second transmission gear 26 is fixedly connected to one side of the third connecting rod, and four second tooth plates 27 are equidistantly toothed on one side of the second transmission gear 26. Four second connecting grooves are equidistantly provided on one side of the installation box 17, and the four second tooth plates 27 pass through the four second connecting grooves respectively. A second pressing plate 28 is fixedly connected to the outer side of the four second tooth plates 27, and a fourth connecting rod is fixedly connected to one side of the second transmission gear 26. A third limiting base is movably sleeved on the outer side of one end of the fourth connecting rod, and one side of the third limiting base is fixedly connected to the inner wall of the installation box 17, and one side of the second pressing plate 28 abuts against an adjacent plate body 1. Through the above technical solution, a limiting mechanism is installed on the second connecting groove side of the installation box 17, which can limit the movement distance of the second tooth plate 27, so that the second tooth plate 27 keeps moving in the direction of tooth connection with the second transmission gear 26, and at the same time, the limiting mechanism can limit the second tooth plate 27 from completely disengaging from the second transmission gear 26 during movement, and at the same time, the limiting mechanism can limit the second tooth plate 27 from interfering with the first transmission gear 20 during movement;

[0037] A screw fixing mechanism is also installed on the inner side of the second pressing plate 28 , which can be fixed to the plate body 1 with screws after the position is adjusted to press the plate body 1 , thereby enhancing the fixing effect.

[0038] It should be noted that when in use, the sheet body 1 is placed between the second mounting bracket 16 and the first mounting bracket 2, the first fixing bolt 10 is removed, and the first rotating handle 9 is rotated. The first rotating handle 9 drives the rotating shaft 7 to move in the mounting sleeve 8, and the rotating shaft 7 drives the first fixing plate 12 and the second fixing plate 14 to rotate until they are no longer movable in the first fixing hole 13 and the second fixing hole 15 respectively. At this time, the second mounting bracket 16 can be pulled through the mounting sleeve 8 and the third connecting plate 6, and the spacing between the second mounting bracket 16 and the first mounting bracket 2 is adjusted until the second mounting bracket 16 and the first mounting bracket 2 clamp and fix the sheet body 1. At this time, the first rotating handle 9 can be operated in reverse, and the rotating shaft 7 drives the first fixing plate 12 and the second fixing plate 14 to rotate until they are movable in the required first fixing hole 13 and the second fixing hole 15 respectively. Reinstall the first fixing bolt 10 to complete the preliminary connection and fixation of the sheet body 1.

[0039] At the same time, according to the actual situation of the plate body 1, the second fixing bolt 19 is removed and the second rotating handle 18 is rotated. The second rotating handle 18 drives the first transmission gear 20 to move. The first transmission gear 20 drives the first pressure plate 22 to move outward through the first tooth plate 21, so that the first pressure plate 22 supports the plate body 1 in a wider range. At the same time, the first transmission gear 20 drives the second transmission gear 26 to move through the second connecting rod, the first ratchet 23, the chain 24, the third connecting rod and the second ratchet 25. The second transmission gear 26 drives the second pressure plate 28 to move outward through the second tooth plate 27, so that the second pressure plate 28 supports the plate body 1 in a wider range to complete the fixed connection.

[0040] The utility model relates to the technical field of connection structures, and provides a connection structure for radiation protection sheds, which solves the problem that the existing connection structure for radiation protection sheds is not convenient for connecting and fixing plates of different thicknesses. When fixing longer plates, it is necessary to increase the support range of the connection structure for better support, and the existing connection structure is not convenient for adjusting the support range. The utility model is more practical.

[0041] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A connection structure for a radiation protection shed, comprising a first mounting bracket (2), characterized in that: A mounting groove (5) is provided on one side of the first mounting bracket (2), a third connecting plate (6) is movably mounted in the mounting groove (5), a second mounting bracket (16) is fixedly connected to one side of the third connecting plate (6), two fixing components are mirror-mounted on the other side of the third connecting plate (6), the two fixing components have the same structure, the fixing components comprise a mounting sleeve (8), the mounting sleeve (8) is fixedly connected to the outer side of the third connecting plate (6), a rotating shaft (7) is movably mounted in the mounting sleeve (8), a first movable groove is provided on one side of the mounting sleeve (8), a first fixing plate (12) is fixedly connected to one side of the rotating shaft (7), one end of the first fixing plate (12) passes through the first movable groove. A first connecting plate (3) is fixedly connected to the outer side of the first mounting bracket (2), a plurality of first fixing holes (13) are equidistantly formed on one side of the first connecting plate (3), one end of the first fixing plate (12) passes through an adjacent first fixing hole (13), a second movable groove is formed on one side of the mounting sleeve (8), a second fixing plate (14) is fixedly connected to one side of the rotating shaft (7), one end of the second fixing plate (14) passes through the second movable groove, a second connecting plate (4) is fixedly connected to the outer side of the first mounting bracket (2), a plurality of second fixing holes (15) are equidistantly formed on one side of the second connecting plate (4), one end of the second fixing plate (14) passes through an adjacent second fixing hole (15).

2. A connection structure for radiation protection sheds according to claim 1, characterized in that: A first rotating handle (9) is fixedly connected to the outer side of the rotating shaft (7), a first fixing bolt (10) is threadedly connected to one side of the first rotating handle (9), two fixing blocks (11) are fixedly connected to the outer side of the mounting sleeve (8) at equal distances, and the lower end of the first fixing bolt (10) is fixedly mounted in an adjacent fixing block (11).

3. A connection structure for radiation protection sheds according to claim 2, characterized in that: The second mounting bracket (16) and the first mounting bracket (2) are both in contact with the plate body (1) on both sides of the middle.

4. A connection structure for radiation protection sheds according to claim 3, characterized in that: The outer side of the second mounting bracket (16) is fixedly connected to a mounting box (17), an upper side of the mounting box (17) is provided with a mounting hole, a first connecting rod is movably installed in the mounting hole, an outer end of the first connecting rod is fixedly connected to a second rotating handle (18), a plurality of first connecting holes are equidistantly provided on the outer side of the second rotating handle (18), a second connecting hole is provided on the outer side of the mounting box (17), a second fixing bolt (19) is threadedly connected in the second connecting hole, and one end of the second fixing bolt (19) is threadedly connected in an adjacent second connecting hole.

5. A connection structure for radiation protection sheds according to claim 4, characterized in that: A first transmission gear (20) is fixedly connected to one end of the inner side of the first connection rod, and four first tooth plates (21) are equidistantly toothed on the inner side of the first transmission gear (20). Four first connection slots are equidistantly formed on one side of the installation box (17), and the four first tooth plates (21) respectively pass through the four first connection slots. A first pressure plate (22) is fixedly connected to the outer side of the four first tooth plates (21), and the inner side of the first pressure plate (22) abuts against an adjacent plate body (1).

6. A connection structure for radiation protection sheds according to claim 5, characterized in that: One side of the first transmission gear (20) is fixedly connected to a second connecting rod, one end of the second connecting rod is movably sleeved on the outer side with a first limiting base, one side of the first limiting base is fixedly connected to the inner wall of the installation box (17), the outer side of the second connecting rod is fixedly sleeved on a first ratchet (23), the outer side of the first ratchet (23) is toothed with a chain (24), the inner side of the chain (24) is toothed with a second ratchet (25), the inner side of the second ratchet (25) is fixedly sleeved with a third connecting rod, one end of the third connecting rod is movably sleeved on the outer side with a second limiting base, and one side of the second limiting base is fixedly connected to the inner wall of the installation box (17).

7. A connection structure for radiation protection sheds according to claim 6, characterized in that: One side of the third connecting rod is fixedly connected to a second transmission gear (26), one side of the second transmission gear (26) is equidistantly toothed with four second tooth plates (27), one side of the installation box (17) is equidistantly provided with four second connection slots, the four second tooth plates (27) respectively pass through the four second connection slots, the outer sides of the four second tooth plates (27) are fixedly connected to a second pressure plate (28), one side of the second transmission gear (26) is fixedly connected to a fourth connecting rod, one end of the fourth connecting rod is movably sleeved with a third limiting base, one side of the third limiting base is fixedly connected to the inner wall of the installation box (17), and one side of the second pressure plate (28) abuts against an adjacent plate body (1).

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