A damping and electromagnetic shielding structure of an energy storage transformer and switch cabinet integrated base

Abstract

The utility model provides a kind of energy storage transformer and switchgear integrated base vibration reduction and electromagnetic shielding structure, it is related to integrated base equipment technical field. Including integrated base, the top of the integrated base is rotatably connected with the maintenance top cover, by setting bottom damping mechanism, integrated base and side locating plate, vibration generated when overall equipment operates is first passed to bottom damping mechanism by integrated base, overall integrated base structure is realized mechanical vibration damping, electromagnetic shielding and the function of convenient maintenance in one by above-mentioned cooperation, provides comprehensive protection for energy storage transformer and switchgear, improves the operation reliability and service life of equipment, by multiple bolt installation easy and fast installation, it can be quickly disassembled and handled to single component when being convenient for maintenance, four second locating bolts are used to reinforce and connect side locating plate and integrated base, to adjust the installation position of electromagnetic shielding filter when being convenient for operation, improve shielding effect.

Description

Technical Field

[0001] This utility model relates to the technical field of integrated base equipment, and in particular to a vibration reduction and electromagnetic shielding structure for an integrated base of an energy storage transformer and switchgear. Background Technology

[0002] With the rapid development of the new energy industry, energy storage systems are increasingly widely used in power grids. Energy storage transformers and switchgear, as core equipment of energy storage systems, typically need to work together. Traditional installation methods separate the transformer and switchgear, resulting in problems such as large footprint, complex wiring, severe electromagnetic interference, and mutual vibration interference. Especially in confined spaces, separate installation not only increases the difficulty of system integration but may also lead to electromagnetic compatibility issues, affecting the stable operation of the power grid.

[0003] In practice, transformers and switchgear in existing technologies are usually mounted on simple rigid bases, which leads to the following problems in actual use;

[0004] Vibrations generated during equipment operation can be transmitted to the building structure through the base, which may lead to loosening of equipment connections, aging of insulation, or even structural damage over a long period of time.

[0005] Transformers and switchgear generate strong electromagnetic fields during operation, which can interfere with surrounding electronic equipment. Using simple metal shielding covers has limited shielding effectiveness and makes it difficult to ensure the convenience of equipment maintenance.

[0006] Meanwhile, most existing installation structures are fixed designs, requiring the removal of a large number of components during equipment maintenance, resulting in low maintenance efficiency and numerous inconveniences.

[0007] Therefore, this utility model provides a vibration reduction and electromagnetic shielding structure for an integrated base of an energy storage transformer and a switchgear. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a new type of base structure that integrates multiple vibration reduction, multiple electromagnetic shielding and easy maintenance, so as to solve the problems mentioned in the background technology.

[0009] To achieve the above objectives, this utility model adopts the following technical solution: a vibration reduction and electromagnetic shielding structure for an integrated base of an energy storage transformer and switchgear, comprising an integrated base.

[0010] The top of the integrated base is rotatably connected to an inspection cover, and the inner wall of the integrated base is fixedly connected to a shielding gasket. A shielding cover is installed inside the shielding gasket, and two sound-absorbing covers are fixedly connected to one side of the shielding cover. The shielding cover, the sound-absorbing cover, and the shielding gasket achieve multiple shielding effects. The energy storage transformer and the switch cabinet are installed inside the integrated base.

[0011] The integrated base has a bottom support plate installed at its bottom. A shock-absorbing connecting plate is fixedly connected to the top of the bottom support plate. A bottom shock-absorbing mechanism is installed on the top of the shock-absorbing connecting plate. The bottom shock-absorbing mechanism includes springs. Equally spaced bottom pressure plates are fixedly connected to the top of the shock-absorbing connecting plate. Equally spaced springs are fixedly connected to the top of the bottom pressure plates. Each spring has a shock-absorbing damper fixedly connected inside. A bottom protective plate is installed on the top of each spring. A reinforcing column is fixedly connected to the top of the bottom protective plate. One end of the top of the reinforcing column is fixedly connected to the bottom of the integrated base.

[0012] A side positioning plate is installed on one side of the integrated base, and an electromagnetic shielding filter is fixedly connected to the outside of the side positioning plate.

[0013] Positioning frames are installed on the top of the bottom support plate and on both sides of the bottom protective plate. Symmetrically distributed support columns are installed on the top of each positioning frame. Mounting brackets are fixedly connected to the top of each support column. Buffer blocks are installed inside each mounting bracket. Support rods are fixedly connected to the top of each buffer block. Auxiliary bonding plates are fixedly connected to the top of each support rod. The tops of the auxiliary bonding plates are fixedly connected to the side support plates. Both side support plates are located below the integrated base. Symmetrically distributed first positioning bolts extending to the bottom of the integrated base are threaded onto the bottom of each side support plate. These first positioning bolts connect the side support plates to the bottom of the integrated base. The support columns and mounting brackets work together to distribute pressure on the sides of the overall equipment, thereby improving the shock absorption effect.

[0014] In a preferred embodiment, the side positioning plate is threaded with second positioning bolts extending to the inner wall of the integrated base on all four sides. A signal receiver is fixedly connected to the outer side of the integrated base and to one side of the side positioning plate. The side positioning plate and the integrated base are reinforced by four second positioning bolts, which facilitates the adjustment of the installation position of the electromagnetic shielding filter during operation and improves the shielding effect. The bottom of the support column and inside the positioning frame is fixedly connected with a positioning base plate. The inside of the positioning base plate is threaded with equally spaced fifth positioning bolts. The inside of the positioning frame and to one side of the positioning base plate is threaded with fourth positioning bolts extending into the shock-absorbing connecting plate. One side of the mounting frame is threaded with third positioning bolts that cooperate with the buffer pressure block for limiting the position. The positioning frame and the shock-absorbing connecting plate are reinforced by multiple fourth positioning bolts, and the positioning base plate and the positioning frame are positioned and installed by multiple fifth positioning bolts. The installation with multiple bolts facilitates quick installation and allows for quick disassembly and assembly of individual components during maintenance.

[0015] In a preferred embodiment, a vibration damping seat is installed on the outer side of the reinforcing column and above the bottom protective plate. A top connecting plate is fixedly connected to the top of each spring, and a bottom limiting seat is fixedly connected to the top of each top connecting plate. The top of each bottom limiting seat is fixedly connected to the bottom protective plate. A sixth positioning bolt extending into the bottom limiting seat is threaded to the bottom of each top connecting plate. Multiple sixth positioning bolts are used to position the bottom limiting seat and top connecting plate, thereby achieving a reinforcement effect on the bottom protective plate and the vibration damping connecting plate. Combined with subsequent buffering and vibration damping treatment, a main control board is fixedly connected inside the electromagnetic shielding filter. A control chip is fixedly connected to the outer side of the main control board. The electromagnetic shielding filter and the signal receiver are both electrically connected to the control chip. The control chip is used to control the operation of the electromagnetic shielding filter and the signal receiver, realizing unified management of the power equipment.

[0016] In a preferred embodiment, the top of the maintenance cover is provided with an opening and closing cover for use with the shielding cover. Two hinge plates are installed at the connection between the maintenance cover and the integrated base. The maintenance cover and the integrated base are connected by the two hinge plates, which facilitates the sealing treatment of the top of the integrated base. When it is necessary to install the energy storage transformer and the switchgear, a mounting column is reserved at the bottom of the switchgear to be inserted into the inside of the shielding cover for subsequent positioning and installation.

[0017] In a preferred embodiment, the integrated base is rotatably connected to limit rods on both sides of the shielding cover, and the outer side of the shielding cover is equipped with limit rods that cooperate to insert into the mounting columns inside the shielding cover for positioning, thereby improving the stability of the equipment during installation.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0019] By incorporating a bottom vibration damping mechanism, an integrated base, and side positioning plates, the vibrations generated during the operation of the entire device are first transmitted to the bottom vibration damping mechanism through the integrated base. The first-stage vibration damping, composed of springs and damping devices, absorbs the main vibration energy and dissipates the mechanical energy into heat energy through elastic deformation. The reinforcing columns and vibration damping seats form a support frame, ensuring the stability of the device while providing the second stage of vibration damping. Simultaneously, the third-stage vibration damping, composed of support columns, mounting brackets, and buffer blocks, effectively disperses and absorbs lateral vibrations. Through multi-stage vibration damping, comprehensive protection is provided for vibrations of different frequencies and directions, reducing the overall vibration transmission rate of the device. The integrated base structure, through the above-mentioned coordination, integrates mechanical vibration damping, electromagnetic shielding, and convenient maintenance functions, providing comprehensive protection for energy storage transformers and switchgear, improving the operational reliability and service life of the equipment, while reducing installation space and maintenance costs. Multiple bolts facilitate quick installation and allow for rapid disassembly and assembly of individual components during maintenance. Four second positioning bolts reinforce the connection between the side positioning plates and the integrated base, facilitating the adjustment of the installation position of the electromagnetic shielding filter during operation and improving the shielding effect. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of the integrated base for energy storage transformer and switchgear provided by this utility model, including vibration reduction and electromagnetic shielding. Figure 1 ;

[0021] Figure 2 A schematic diagram of the overall structure of the integrated base for energy storage transformer and switchgear provided by this utility model, including vibration reduction and electromagnetic shielding. Figure 2 ;

[0022] Figure 3 An enlarged schematic diagram of the internal structure of an integrated base for vibration reduction and electromagnetic shielding of an integrated base for an energy storage transformer and switchgear, provided for this utility model.

[0023] Figure 4 Enlarged schematic diagram of the bottom shock absorption mechanism of the integrated base for energy storage transformer and switchgear provided by this utility model, which includes vibration reduction and electromagnetic shielding. Figure 1 ;

[0024] Figure 5 Enlarged schematic diagram of the bottom shock absorption mechanism of the integrated base for energy storage transformer and switchgear provided by this utility model, which includes vibration reduction and electromagnetic shielding. Figure 2 ;

[0025] Figure 6This utility model provides a vibration reduction and electromagnetic shielding structure for an integrated base of an energy storage transformer and switchgear. Figure 2 Enlarged schematic diagram of the structure at point A in the diagram;

[0026] Figure 7 This utility model provides a vibration reduction and electromagnetic shielding structure for an integrated base of an energy storage transformer and switchgear. Figure 2 Enlarged schematic diagram of the structure at point B in the diagram.

[0027] Legend:

[0028] 1. Integrated base; 11. Inspection top cover; 12. Opening and closing cover; 13. Hinge plate; 14. Side support plate; 15. First positioning bolt;

[0029] 2. Side positioning plate; 21. Electromagnetic shielding filter; 22. Second positioning bolt; 23. Signal receiver;

[0030] 3. Bottom support plate; 31. Shock-absorbing connecting plate; 32. Positioning frame; 33. Positioning base plate; 34. Support column; 35. Mounting frame; 36. Buffer block; 37. Third positioning bolt; 38. Fourth positioning bolt; 39. Fifth positioning bolt;

[0031] 4. Auxiliary bonding plate; 41. Support rod; 42. Vibration damping seat; 43. Bottom protective plate; 44. Reinforcing column; 45. Bottom limiting seat; 46. Spring; 47. Vibration damper; 48. Sixth positioning bolt; 49. Bottom pressure plate;

[0032] 5. Shielding cover; 51. Sound-absorbing cover; 52. Limiting rod; 53. Shielding gasket; 54. Limiting insert rod. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] like Figures 1-7As shown, this embodiment provides a technical solution: a vibration reduction and electromagnetic shielding structure for an integrated base of an energy storage transformer and a switchgear, including an integrated base 1, an inspection top cover 11 rotatably connected to the top of the integrated base 1, a shielding gasket 53 fixedly connected to the inner wall of the integrated base 1, a shielding cover 5 installed inside the shielding gasket 53, and two sound-absorbing covers 51 fixedly connected to one side of the shielding cover 5. The shielding cover 5, the sound-absorbing cover 51 and the shielding gasket 53 achieve multiple shielding effects, and the integrated base of the energy storage transformer and the switchgear is installed inside the integrated base 1;

[0035] In this solution, a bottom support plate 3 is installed at the bottom of the integrated base 1, a shock-absorbing connecting plate 31 is fixedly connected to the top of the bottom support plate 3, a bottom shock-absorbing mechanism is installed at the top of the shock-absorbing connecting plate 31, the bottom shock-absorbing mechanism includes a spring 46, a bottom pressure plate 49 is fixedly connected to the top of the shock-absorbing connecting plate 31 at equal intervals, a spring 46 is fixedly connected to the top of the bottom pressure plate 49 at equal intervals, a shock-absorbing damper 47 is fixedly connected inside each spring 46, a bottom protective plate 43 is installed at the top of each spring 46, a reinforcing column 44 is fixedly connected to the top of the bottom protective plate 43, and one end of the top of the reinforcing column 44 is fixedly connected to the bottom of the integrated base 1.

[0036] In this solution, a side positioning plate 2 is installed on one side of the integrated base 1, and an electromagnetic shielding filter 21 is fixedly connected to the outside of the side positioning plate 2.

[0037] In this design, positioning frames 32 are installed on the top of the bottom support plate 3 and on both sides of the bottom protective plate 43. Symmetrically distributed support columns 34 are installed on the top of each positioning frame 32. Mounting frames 35 are fixedly connected to the top of each support column 34. Buffer blocks 36 are installed inside each mounting frame 35. Support rods 41 are fixedly connected to the top of each buffer block 36. Auxiliary bonding plates 4 are fixedly connected to the top of each support rod 41. The top of each auxiliary bonding plate 4 is fixedly connected to the side support plate 14. Both side support plates 14 are located below the integrated base 1. Symmetrically distributed first positioning bolts 15 extending to the bottom of the integrated base 1 are threaded onto the bottom of each side support plate 14. The first positioning bolts 15 connect the side support plate 14 to the bottom of the integrated base 1. The support columns 34 and mounting frames 35 work together to distribute pressure on the sides of the entire equipment, thereby improving the shock absorption effect.

[0038] Going a step further, such as Figures 1-6As shown: In this scheme, the side positioning plate 2 is threaded with second positioning bolts 22 extending to the inner wall of the integrated base 1. The signal receiver 23 is fixedly connected to the outside of the integrated base 1 and on one side of the side positioning plate 2. The side positioning plate 2 and the integrated base 1 are reinforced by the four second positioning bolts 22, which facilitates the adjustment of the installation position of the electromagnetic shielding filter 21 during operation and improves the shielding effect.

[0039] In this scheme, the electromagnetic shielding filter 21 is internally fixedly connected to a main control board, and the main control board is externally fixedly connected to a control chip. The electromagnetic shielding filter 21 and the signal receiver 23 are both electrically connected to the control chip. The control chip is used to control the operation of the electromagnetic shielding filter 21 and the signal receiver 23, thereby realizing the unified management of power equipment.

[0040] Going a step further, such as Figures 1-7 As shown: In this scheme, the bottom of the support column 34 and inside the positioning frame 32 are all fixedly connected to the positioning base plate 33. The inside of the positioning base plate 33 is threaded with equally spaced fifth positioning bolts 39. The inside of the positioning frame 32 and on one side of the positioning base plate 33 are all threaded with fourth positioning bolts 38 extending into the shock-absorbing connecting plate 31. One side of the mounting frame 35 is threaded with third positioning bolts 37 that cooperate with the buffer pressure block 36 for limiting. The positioning frame 32 and the shock-absorbing connecting plate 31 are reinforced and connected by multiple fourth positioning bolts 38. The positioning base plate 33 and the positioning frame 32 are positioned and installed by multiple fifth positioning bolts 39. The installation with multiple bolts is convenient and quick to install, and allows for quick disassembly and assembly of individual components during maintenance.

[0041] In this scheme, a vibration damping seat 42 is installed on the outside of the reinforcing column 44 and above the bottom protective plate 43. The top of the spring 46 is fixedly connected to a top connecting plate, and the top of the top connecting plate is fixedly connected to a bottom limiting seat 45. The top of the bottom limiting seat 45 is fixedly connected to the bottom protective plate 43. The bottom of the top connecting plate is threadedly connected to a sixth positioning bolt 48 extending into the bottom limiting seat 45. The bottom limiting seat 45 and the top connecting plate are positioned by multiple sixth positioning bolts 48, thereby achieving the reinforcement effect of the bottom protective plate 43 and the vibration damping connecting plate 31, in conjunction with subsequent buffering and vibration damping treatment.

[0042] Going a step further, such as Figures 1-5As shown in the diagram, the top of the maintenance cover 11 is provided with an opening and closing cover 12 for use with the shielding cover 5. Two hinge plates 13 are installed at the connection between the maintenance cover 11 and the integrated base 1. The maintenance cover 11 and the integrated base 1 are connected by the two hinge plates 13, which facilitates the sealing treatment of the top of the integrated base 1. When it is necessary to install the energy storage transformer and the switchgear, a mounting column is reserved at the bottom of the switchgear to be inserted into the shielding cover 5 for subsequent positioning and installation.

[0043] In this solution, the integrated base 1 is rotatably connected to limit rods 52 on both sides of the shielding cover 5. The outer side of the shielding cover 5 is equipped with limit rods 54 that are inserted into the mounting column inside the shielding cover 5 to limit the positioning, thereby positioning the mounting column of different specifications and improving the stability of the equipment during installation.

[0044] Working principle:

[0045] like Figures 1-7 As shown:

[0046] By incorporating a bottom damping mechanism, an integrated base 1, and side positioning plates 2, the vibrations generated during operation are first transmitted to the bottom damping mechanism via the integrated base 1. The first-stage damping, consisting of springs 46 and dampers 47, absorbs the main vibration energy and dissipates it as heat through elastic deformation. The reinforcing columns 44 and damping seats 42 form a support frame, ensuring equipment stability while providing a second stage of damping. Simultaneously, the third-stage damping, consisting of support columns 34, mounting brackets 35, and buffer blocks 36, effectively disperses and absorbs lateral vibrations. Multi-stage vibration damping provides comprehensive protection against vibrations of different frequencies and directions, reducing the overall vibration transmission rate of the equipment. Electromagnetic interference is first blocked by the shielding cover 5, which is made of high-permeability magnetic material to absorb and reflect electromagnetic waves. Shielding gaskets 53 are filled into the inner wall of the integrated base 1 to prevent electromagnetic leakage. The sound-absorbing cover 51 absorbs equipment operating noise and further enhances the shielding effect. The electromagnetic shielding filter 21 is installed on the side positioning plate 2 to filter cables that need to enter and exit the equipment inside the switch cabinet, eliminating conducted interference. This not only prevents internal electromagnetic fields from radiating outwards, but also... It can block external electromagnetic interference from affecting equipment operation. The signal receiver 23 monitors changes in the electromagnetic environment in real time. The control chip automatically adjusts the working parameters of the electromagnetic shielding filter 21 to achieve adaptive electromagnetic protection. The hinge plate 13 connects the openable maintenance cover 11 and the hinged cover 12, making equipment maintenance and repair simple and quick. The cooperation of the limit rod 52 and the limit plug 54 can adapt to different specifications of equipment mounting columns, ensuring the accuracy and stability of equipment installation. The integrated base structure achieves mechanical vibration reduction, electromagnetic shielding and convenient maintenance functions in one, providing comprehensive protection for energy storage transformers and switchgear, improving the operational reliability and service life of the equipment, while reducing installation space and maintenance costs. Multiple bolts facilitate quick installation and allow for quick disassembly and assembly of individual components during maintenance. The control chip is used to control the operation of the electromagnetic shielding filter 21 and the signal receiver 23, realizing unified management of power equipment. The side positioning plate 2 and the integrated base 1 are reinforced and connected by four second positioning bolts 22, which facilitates the adjustment of the installation position of the electromagnetic shielding filter 21 during operation and improves the shielding effect.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A vibration reduction and electromagnetic shielding structure for an integrated base of an energy storage transformer and switchgear, comprising an integrated base (1), characterized in that, The inner wall of the integrated base (1) is fixedly connected with a shielding pad (53), and a shielding cover (5) is installed inside the shielding pad (53). Two sound-absorbing covers (51) are fixedly connected to one side of the shielding cover (5). The bottom of the integrated base (1) is equipped with a bottom support plate (3), and the top of the bottom support plate (3) is fixedly connected with a shock-absorbing connecting plate (31). The top of the shock-absorbing connecting plate (31) is equipped with a bottom shock-absorbing mechanism, which includes a spring (46). The top of the shock-absorbing connecting plate (31) is fixedly connected with equally spaced bottom pressure plates (49). The top of the bottom pressure plates (49) is fixedly connected with equally spaced springs (46). The inside of each spring (46) is fixedly connected with a shock-absorbing damper (47). The top of each spring (46) is equipped with a bottom protective plate (43). The top of the bottom protective plate (43) is fixedly connected with a reinforcing column (44). One end of the top of the reinforcing column (44) is fixedly connected to the bottom of the integrated base (1). An electromagnetic shielding filter (21) is installed on one side of the integrated base (1). Positioning frames (32) are installed on the top of the bottom support plate (3) and on both sides of the bottom protective plate (43). The top of the positioning frames (32) is equipped with symmetrically distributed support columns (34) that are supported by the integrated base (1). The top of each support column (34) is fixedly connected to a mounting bracket (35), and the inside of each mounting bracket (35) is installed with a buffer block (36). The top of each buffer block (36) is fixedly connected to a support rod (41), and the top of each support rod (41) is fixedly connected to an auxiliary bonding plate (4). The top of each auxiliary bonding plate (4) is fixedly connected to a side support plate (14). The bottom of each side support plate (14) is threaded with first positioning bolts (15) that are symmetrically distributed and extend to the bottom of the integrated base (1). A side positioning plate (2) is installed on one side of the integrated base (1). The outer side of the side positioning plate (2) is fixedly connected to an electromagnetic shielding filter (21). The four sides of the side positioning plate (2) are threaded with second positioning bolts (22) that extend to the inner wall of the integrated base (1). A signal receiver (23) is fixedly connected to the outer side of the integrated base (1) and to the side of the side positioning plate (2). The bottom of the support column (34) and inside the positioning frame (32) are all fixedly connected to a positioning base plate (33). The inside of the positioning base plate (33) is threaded with equidistant fifth positioning bolts (39). The inside of the positioning frame (32) and on one side of the positioning base plate (33) are all threaded with a fourth positioning bolt (38) extending into the inside of the shock-absorbing connecting plate (31). The side of the mounting frame (35) is threaded with a third positioning bolt (37) that cooperates with the buffer pressure block (36) for limiting. Vibration damping seat (42) is installed on the outside of the reinforcing column (44) and above the bottom protective plate (43). The top of the spring (46) is fixedly connected to a top connecting plate. The top of the top connecting plate is fixedly connected to a bottom limiting seat (45). The top of the bottom limiting seat (45) is fixedly connected to the bottom protective plate (43). The bottom of the top connecting plate is threaded with a sixth positioning bolt (48) extending into the bottom limiting seat (45).

2. The vibration reduction and electromagnetic shielding structure of the integrated base of the energy storage transformer and switchgear according to claim 1, characterized in that: The electromagnetic shielding filter (21) has a main control board fixedly connected inside, and a control chip is fixedly connected to the outside of the main control board. The electromagnetic shielding filter (21) and the signal receiver (23) are both electrically connected to the control chip.

3. The vibration reduction and electromagnetic shielding structure of the integrated base of the energy storage transformer and switchgear according to claim 1, characterized in that: The top of the integrated base (1) is rotatably connected to a maintenance cover (11). The top of the maintenance cover (11) is provided with an opening and closing cover (12) for use with the shielding cover (5). Two hinge plates (13) are installed at the connection between the maintenance cover (11) and the integrated base (1).

4. The vibration reduction and electromagnetic shielding structure of the integrated base of the energy storage transformer and switchgear according to claim 3, characterized in that: The integrated base (1) is rotatably connected to limit rods (52) on both sides of the shield (5), and the shield (5) is equipped with a limit rod (54) on the outside of the shield (5) to cooperate with the installation column inside the shield (5) for limiting.

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