Spherical crown lining plate device

By designing a ball crown lining device including pressurized blocks, fixed discs, operating discs and pressure rod components, the problems of many types of pressurized tooling and cumbersome replacement caused by the variety of ball crown products in the prior art are solved, and the problem of cushioning is complicated to achieve The effect of reducing the number of pressurized tooling and reducing the cost of processing tooling is achieved.

CN222471286UActive Publication Date: 2025-02-14TIEKE (XINGCHENG) TECH CO LTD
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Patent Information

Application Number
CN202420899281.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-28
Publication Date
2025-02-14
Estimated Expiration
2034-04-28

AI Technical Summary

Technical Problem

In the prior art, the Qiuguan products are diverse, resulting in a wide variety of pressurized tooling and cumbersome replacement, which increases the cost of processing tooling.

Method used

A ball crown lining device is designed, and a pressurized tooling including a pressurized block, a fixed disk, an operating disk and several pressure rod components is used to achieve uniformity of the cladding plate through the rotation of the operating disk and the adjustment of the pressure rod components. Pressure reduces the number of pressurized tooling.

Benefits of technology

It has achieved the reduction of the number of pressurized tooling, reduced the cost of processing tooling, and improved the versatility of pressurized tooling.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of bridge support installation, and particularly relates to a spherical crown lining plate device. A plurality of linear slideways are radially formed in a fixed disc of a pressurizing tool in the spherical crown lining plate device, a plurality of curve slideways rotating from the circle center of the operating disc to the outer wall of the operating disc are formed in the operating disc, a plurality of pressure rod assemblies are in one-to-one correspondence with the linear slideways, and the pressure rod assemblies sequentially penetrate through the linear slideways and the curve slideways. The curve slideways correspond to the linear slideways in a one-to-one mode, and the operation panel can rotate to enable the pressure rod assembly to slide in the curve slideways so as to drive the pressure rod assembly to slide in the linear slideways. The bottom ends of the multiple pressure rod assemblies are located below the fixing disc and make contact with the upper surface of the spherical crown lining plate assembly. Therefore, according to the spherical crown lining plate device, the downward pressurizing range of the multiple pressure rod assemblies can be adjusted according to the size of the target spherical crown lining plate, the universality of pressurizing tools is improved, the number of the pressurizing tools is reduced, and the tool machining cost is reduced.
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Description

Technical Field

[0001] The utility model belongs to the technical field of bridge support installation, in particular to a spherical cap lining device. Background Art

[0002] As an important component in the field of bridges and buildings, the spherical bearing plays the role of supporting the load of the superstructure on the one hand, and sensitively transmitting the load and deformation of the superstructure to the lower structure on the other hand. The spherical bearing usually includes an upper bearing plate connected to the superstructure, a lower bearing plate connected to the lower structure, and a spherical cap located between the upper and lower bearing plates. The spherical cap, as the main component for transmitting the load and deformation of the superstructure and the lower structure, needs to have higher wear resistance, smaller roughness and friction coefficient. In order to enable the spherical surface of the spherical cap to sensitively transmit the load and deformation of the superstructure, and at the same time have better wear resistance during the friction with the bottom surface of the upper bearing plate, three methods are generally used: welding a cladding plate on the spherical surface of the spherical cap, plating a nickel-phosphorus alloy layer on the spherical surface of the spherical cap, or using an aluminum alloy spherical cap.

[0003] Among them, the cladding plate in the method of welding the cladding plate on the spherical surface of the spherical crown needs to be pressed into a spherical shape that matches the spherical crown first, and then the pressed cladding plate is welded to the spherical crown. However, there is a requirement for the arc tolerance for the welding of the two, so as to ensure that there is a certain spherical fit between the two, so that the cladding plate can be more evenly stressed. Theoretically speaking, the cladding plate should be consistent with the curvature of the adapted spherical crown during pressing, but the curvature of the cladding plate is difficult to control, and there is usually a large tolerance, so that a certain spherical fit cannot be achieved during welding, so it is necessary to use a tooling with the same arc as the spherical crown to pressurize the cladding plate placed on the spherical crown before welding.

[0004] However, the variety of ball crown products requires different tooling for pressurization, which will lead to cumbersome tooling changes and increase the cost of processing tooling. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a ball crown lining device, thereby solving the technical problems of the current large variety of pressurizing tooling, complicated replacement, and increased tooling processing costs.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0009] The utility model embodiment provides a ball crown lining device, including a ball crown lining assembly, and also includes a pressurizing tool, the pressurizing tool includes a pressure block, a fixed disk, an operating disk and a plurality of pressure rod assemblies, the pressure block is fixed to the upper wall of the fixed disk and is located at the center of the fixed disk, the operating disk is coaxially rotatably sleeved on the outside of the pressure block; the fixed disk is radially provided with a plurality of linear slides, the operating disk is provided with a plurality of curved slides rotating from the center of the circle to the outer wall thereof, a plurality of pressure rod assemblies correspond one-to-one to the plurality of linear slides, the pressure rod assemblies are sequentially passed through a linear slide and a curved slide, the linear slide and the curved slide passed through the same pressure rod assembly are in a corresponding relationship, a plurality of curved slides correspond one-to-one to a plurality of linear slides, the operating disk can rotate by itself to make the pressure rod assembly slide in the curved slide to drive the pressure rod assembly to slide in the linear slide; the bottom ends of the plurality of pressure rod assemblies are all located below the fixed disk, contact with the upper surface of the ball crown lining assembly and are located on the same circumference.

[0010] Furthermore, an operating column is provided on the operating disk, in which an axial threaded through hole is opened and the threaded through hole passes through the operating disk; when the bolt is screwed into the threaded through hole and passes through the operating disk to abut against the fixed disk, the operating disk is stationary relative to the fixed disk.

[0011] Furthermore, the pressure rod assembly includes a pressure rod, which includes a driving part and a balancing part. The driving part and the balancing part are connected by a connecting plate, the driving part is located above the fixed disk, the connecting plate is adapted to slide in the linear slide, and the balancing part is located below the fixed disk; the driving part includes a clamping block and a sliding rod, the sliding rod is fixed above the clamping block, the width of the clamping block is greater than the width of the linear slide, and the sliding rod is adapted to slide in the curved slide.

[0012] Furthermore, the pressure rod assembly also includes a main cross arm, two vertical arms and two contact claws; a radial through groove is opened at the bottom of the balancing part, the height of the radial through groove is less than the height of the balancing part, the main cross arm is arranged in the radial through groove and is hinged to the pressure rod with the midpoint of the main cross arm as the hinge point, the upper ends of the two vertical arms are respectively hinged to the two ends of the main cross arm, and the two contact claws are respectively hinged to the lower ends of the two vertical arms; the contact claws are in a herringbone shape, the midpoint of the contact claws is the hinge point, and the end points on both sides of the contact claws are contacts.

[0013] Furthermore, the pressure rod assembly also includes a secondary cross arm, which is arranged in the radial through groove and hinged to the pressure rod with the midpoint of the secondary cross arm as the hinge point. The secondary cross arm is located below the main cross arm, and both ends of the secondary cross arm are respectively hinged to the midpoints of the two vertical arms.

[0014] Furthermore, the spherical crown lining assembly includes a covering plate and a spherical crown lining, the covering plate is placed on the upper surface of the spherical crown lining, and the contact claws are adaptively fitted to the upper surface of the covering plate; it also includes a workbench, and the spherical crown lining is placed on the workbench.

[0015] Furthermore, the thickness of the cladding plate ranges from 1 to 3 mm.

[0016] Furthermore, the material of the ball crown lining is cast steel or forged steel, and the material of the cladding plate is stainless steel.

[0017] Furthermore, the linear slideways are evenly distributed on the circumference of the fixed disk.

[0018] Furthermore, a driver is connected to the top of the pressure block, and the driver drives the pressure block to move up and down.

[0019] (III) Beneficial effects

[0020] The beneficial effects of the utility model are:

[0021] The utility model is a ball crown lining device. Since a plurality of straight slideways are radially provided on the fixed disk of the pressurizing tooling, and a plurality of curved slideways rotating from the center of the circle to the outer wall of the operating disk are provided, the pressure rod assembly is sequentially passed through a straight slideway and a curved slideway, and the bottom ends of the plurality of pressure rod assemblies are all located below the fixed disk and on the same circumference. The operating disk rotates to make the pressure rod assembly slide in the curved slideway to drive the pressure rod assembly to slide in the straight slideway, so that the downward pressurization range of the plurality of pressure rod assemblies can be adjusted according to the size of the target ball crown lining, thereby increasing the versatility of the pressurizing tooling. Compared with the prior art, it realizes the reduction of the number of pressurizing tooling and thus reduces the processing tooling cost. In addition, the utility model can also be applied to any other occasions where uniform pressure needs to be applied to the ball part. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the ball cap lining device;

[0023] Figure 2 It is the explosion diagram of the ball cap liner device;

[0024] Figure 3 Schematic diagram of the structure of the pressure rod assembly.

[0025] [Description of Reference Numerals]

[0026] 1: pressurizing tooling; 11: pressurized block; 12: fixed plate; 121: linear slideway; 13: operating plate; 131: curved slideway; 14: pressure rod assembly; 141: pressure rod; 1411: driving part; 14111: clamping block; 14112: sliding rod; 1412: balancing part; 14121: radial through groove; 1413: connecting plate; 142: main cross arm; 143: vertical arm; 144: contact claw; 145: secondary cross arm; 15: operating column; 151: threaded through hole;

[0027] 2: Ball crown lining assembly; 21: Covering plate; 22: Ball crown lining;

[0028] 3: workbench; 4: driver. DETAILED DESCRIPTION

[0029] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0030] like Figure 1-3 As shown, the utility model provides a spherical cap lining device, including a pressurizing tool 1, a spherical cap lining assembly 2 and a workbench 3. Figure 1 , Figure 2 As shown, the spherical cap lining assembly 2 includes a covering plate 21 and a spherical cap lining plate 22, and the covering plate 21 is placed on the upper surface of the spherical cap lining plate 22. During operation, the spherical cap lining plate 22 is placed on the workbench 3, and the pressurizing tool 1 applies pressure to the covering plate 21 to make the curvature of the covering plate 21 consistent with that of the spherical cap lining plate 22, so that when the covering plate 21 is subsequently welded to the upper surface of the spherical cap lining plate 22, a certain spherical fit between the two can be ensured, so that the covering plate 21 can be subjected to uniform force.

[0031] The pressurizing tool 1 comprises a pressure block 11, a fixed plate 12, an operating plate 13 and a plurality of pressure rod assemblies 14. The pressure block 11 is fixed to the upper wall of the fixed plate 12 and is located at the center of the fixed plate 12. The operating plate 13 is coaxially rotatably sleeved on the outside of the pressure block 11. The bottom ends of the plurality of pressure rod assemblies 14 are all located below the fixed plate 12 and on the same circumference and can adjust the working diameter according to the size change of the spherical cap liner assembly 2.

[0032] Specifically, Figure 2 As shown, the fixed disk 12 is radially provided with a plurality of linear slideways 121. In order to ensure uniform force, the linear slideways 121 are evenly distributed on the circumference of the fixed disk 12. The operating disk 13 is provided with a plurality of curved slideways 131 rotating from its center to its outer wall. The plurality of pressure rod assemblies 14 correspond one to one with the plurality of linear slideways 121. The pressure rod assemblies 14 are sequentially penetrated in a linear slideway 121 and a curved slideway 131. The linear slideway 121 and the curved slideway 131 penetrated by the same pressure rod assembly 14 are in a corresponding relationship. The plurality of curved slideways 131 correspond one to one with the plurality of linear slideways 121.

[0033] Further, if Figure 2 , Figure 3 As shown, the pressure rod assembly 14 includes a pressure rod 141, and the pressure rod 141 includes a driving part 1411 and a balancing part 1412. The driving part 1411 and the balancing part 1412 are connected by a connecting plate 1413. The driving part 1411 is located above the fixed disk 12, and the connecting plate 1413 is adapted to slide in the linear slide 121, and the balancing part 1412 is located below the fixed disk 12.

[0034] The driving part 1411 includes a block 14111 and a sliding rod 14112. The sliding rod 14112 is fixed above the block 14111. The width of the block 14111 is greater than the width of the linear slide 121, so that the pressure rod 141 can be stuck on the fixed plate 12. The sliding rod 14112 is adapted to slide in the curved slide 131 and is slidably arranged in the curved slide 131.

[0035] The operating disk 13 can rotate to make the sliding rod 14112 slide in the curved slideway 131 to drive the pressure rod assembly 14 to slide in the linear slideway 121 to adjust the working diameter.

[0036] The operating panel 13 has two states: locked and unlocked. When the operating panel 13 is in the locked state, the operating panel 13 cannot rotate by itself. When the operating panel 13 is in the unlocked state, the operating panel 13 can rotate by itself.

[0037] Specifically, Figure 2 As shown, an operating column 15 is provided on the operating disk 13, and an axial threaded through hole 151 is opened in the operating column 15, and the threaded through hole 151 passes through the operating disk 13. When the operating disk 13 is in a locked state, a bolt is screwed into the threaded through hole 151 and passes through the operating disk 13 to abut against the fixed disk 12, so that resistance is generated between the operating disk 13 and the fixed disk 12, so that the operating disk 13 is stationary relative to the fixed disk 12. When the operating disk 13 is in an unlocked state, the bolt is screwed out at least away from the fixed disk 12, so that there is no resistance between the operating disk 13 and the fixed disk 12, and the operating disk 13 can rotate relative to the fixed disk 12.

[0038] After rotating the operating disk 13 to adjust the working diameter of the pressure rod assembly 14 , the operating disk 13 is locked, and the pressurizing tool 1 is placed on the upper surface of the spherical crown liner assembly 2 so that the pressure rod assemblies 14 are in contact with the upper surface of the spherical crown liner assembly 2 .

[0039] like Figure 3 As shown, the pressure rod assembly 14 also includes a main cross arm 142, two vertical arms 143, two contact claws 144 and a secondary cross arm 145. A radial through slot 14121 is provided at the bottom of the balancing portion 1412 of the pressure rod 141, and the height of the radial through slot 14121 is less than the height of the balancing portion 1412. The main cross arm 142 is arranged in the radial through slot 14121 and is hinged to the pressure rod 141 with the midpoint of the main cross arm 142 as the hinge point. The upper ends of the two vertical arms 143 are respectively hinged to the two ends of the main cross arm 142, and the two contact claws 144 are respectively hinged to the lower ends of the two vertical arms 143.

[0040] In order to increase the balance of the two vertical arms 143, the secondary cross arm 145 is arranged in the radial through groove 14121 and is hinged to the pressure rod 141 with the midpoint of the secondary cross arm 145 as the hinge point. The secondary cross arm 145 is located below the main cross arm 142, and the two ends of the secondary cross arm 145 are respectively hinged to the midpoints of the two vertical arms 143.

[0041] The contact claw 144 is in a herringbone shape, the midpoint of the contact claw 144 is a hinge point, and the end points on both sides of the contact claw 144 are contact points. The contact claw 144 can freely adjust the angle under pressure to adaptively fit the upper surface of the covering plate 21. In addition, the material of the contact claw 144 is rubber, which can achieve flexible and uniform pressure on the covering plate 21, so that the covering plate 21 and the ball cap lining plate 22 are better fitted.

[0042] like Figure 1 , Figure 2 As shown, a driver 4 is connected to the top of the pressure block 11. When working, the driver 4 applies pressure to the pressure block 11, so that the two vertical arms 143 of each pressure rod assembly 14 are automatically adjusted to a balanced state on the surface of the covering plate 21, that is, the lower ends of the two vertical arms 143 fall on the surface of the covering plate 21 without being suspended in the air. Furthermore, the contact claw 144 located at the lower end of the vertical arm 143 will also automatically adjust the angle to adaptively fit the upper surface of the covering plate 21, that is, the two contact points of the contact claw 144 fall on the surface of the covering plate 21 without being suspended in the air.

[0043] The positions of the two vertical arms 143 of each pressure rod assembly 14 and the angle of the contact claw 144 will change with the curvature of the covering plate 21 , so that the curvature of the covering plate 21 is consistent with the curvature of the spherical cap lining plate 22 .

[0044] In addition, the thickness of the cladding plate 21 is in the range of 1-3 mm, the cladding plate 21 is made of stainless steel, and the spherical cap lining plate 22 is made of cast steel or forged steel. In addition, the height of the weld between the cladding plate 21 and the spherical cap lining plate 22 is in the range of 1-3 mm.

[0045] Working principle: Place the spherical cap lining plate 22 to be welded with the cladding plate 21 on the workbench 3, and place the cladding plate 21 on the upper surface of the spherical cap lining plate 22. According to the radius of the spherical cap lining plate 22, rotate the operating disk 13 to adjust the working diameter of the pressure rod assemblies 14. After adjustment, screw the bolts in the operating column 15 to lock the operating disk 13. Start the driver 4 to apply pressure to the pressure block 11 of the pressurizing tool 1, so that the two vertical arms 143 of each pressure rod assembly 14 are automatically adjusted to a balanced state on the surface of the cladding plate 21, and the claws 144 at the lower end of the vertical arms 143 will also automatically adjust the angle to fit the upper surface of the cladding plate 21 adaptively, so that the cladding plate 21 is evenly stressed. After pressing the cladding plate 21, turn off the driver 4 to weld the cladding plate 21 and the spherical cap lining plate 22.

[0046] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0049] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A spherical cap lining device, comprising a spherical cap lining assembly (2), characterized in that: It also includes a pressurizing tool (1), the pressurizing tool (1) including a pressure block (11), a fixed disk (12), an operating disk (13) and a plurality of pressure rod assemblies (14), the pressure block (11) being fixed to the upper wall of the fixed disk (12) and being located at the center of the fixed disk (12), and the operating disk (13) being coaxially rotatably sleeved on the outer side of the pressure block (11); The fixed disk (12) is radially provided with a plurality of linear slideways (121), the operating disk (13) is provided with a plurality of curved slideways (131) rotating from the center of the circle to the outer wall thereof, the plurality of pressure rod assemblies (14) correspond one to one with the plurality of linear slideways (121), the pressure rod assemblies (14) are sequentially passed through one linear slideway (121) and one curved slideway (131), the linear slideway (121) and the curved slideway (131) passed through the same pressure rod assembly (14) are in a corresponding relationship, the plurality of curved slideways (131) correspond one to one with the plurality of linear slideways (121), the operating disk (13) can rotate to make the pressure rod assembly (14) slide in the curved slideway (131) so as to drive the pressure rod assembly (14) to slide in the linear slideway (121); The bottom ends of the plurality of pressure rod assemblies (14) are all located below the fixing plate (12), in contact with the upper surface of the spherical cap lining assembly (2) and are located on the same circumference.

2. The spherical cap lining device according to claim 1, characterized in that: An operating column (15) is provided on the operating panel (13), an axial threaded through hole (151) is provided in the operating column (15), and the threaded through hole (151) passes through the operating panel (13); When the bolt is screwed into the threaded through hole (151) and passes through the operating disk (13) to abut against the fixed disk (12), the operating disk (13) is stationary relative to the fixed disk (12).

3. The spherical cap lining device according to claim 1, characterized in that: The pressure rod assembly (14) comprises a pressure rod (141), and the pressure rod (141) comprises a driving part (1411) and a balancing part (1412). The driving part (1411) and the balancing part (1412) are connected via a connecting plate (1413). The driving part (1411) is located above the fixed plate (12). The connecting plate (1413) is adapted to slide in the linear slideway (121) and is arranged. The balancing part (1412) is located below the fixed plate (12). The driving part (1411) comprises a block (14111) and a sliding rod (14112); the sliding rod (14112) is fixed above the block (14111); the width of the block (14111) is greater than the width of the linear slideway (121); the sliding rod (14112) is adapted to slide with the curved slideway (131) and is arranged in the curved slideway (131).

4. The spherical cap lining device according to claim 3, characterized in that: The pressure rod assembly (14) further comprises a main horizontal arm (142), two vertical arms (143) and two contact claws (144); A radial through groove (14121) is provided at the bottom of the balancing portion (1412), the height of the radial through groove (14121) is smaller than the height of the balancing portion (1412), the main cross arm (142) is arranged in the radial through groove (14121) and is hinged to the pressure rod (141) with the midpoint of the main cross arm (142) as the hinge point, the upper ends of the two vertical arms (143) are respectively hinged to the two ends of the main cross arm (142), and the two contact claws (144) are respectively hinged to the lower ends of the two vertical arms (143); The contact claw (144) is in the shape of a herringbone, the midpoint of the contact claw (144) is a hinge point, and the endpoints on both sides of the contact claw (144) are contact points.

5. The spherical cap lining device according to claim 4, characterized in that: The pressure rod assembly (14) also includes a secondary cross arm (145), which is arranged in the radial through groove (14121) and is hinged to the pressure rod (141) with the midpoint of the secondary cross arm (145) as the hinge point. The secondary cross arm (145) is located below the main cross arm (142), and the two ends of the secondary cross arm (145) are respectively hinged to the midpoints of the two vertical arms (143).

6. The spherical cap lining device according to claim 4, characterized in that: The spherical cap lining assembly (2) comprises a covering plate (21) and a spherical cap lining (22), wherein the covering plate (21) is placed on the upper surface of the spherical cap lining (22), and the contact claw (144) is adaptively fitted to the upper surface of the covering plate (21); It also comprises a workbench (3), on which the spherical cap lining plate (22) is placed.

7. The spherical cap lining device according to claim 6, characterized in that: The thickness of the cladding plate (21) is in the range of 1-3 mm.

8. The spherical cap lining device according to claim 6, characterized in that: The material of the spherical cap lining plate (22) is cast steel or forged steel, and the material of the cladding plate (21) is stainless steel.

9. The spherical cap lining device according to claim 1, characterized in that: The linear slideways (121) are evenly distributed on the circumference of the fixed disk (12).

10. The spherical cap lining device according to claim 1, characterized in that: The top of the pressure block (11) is connected to a driver (4), and the driver (4) drives the pressure block (11) to move up and down.