Damping shoulder seat structure for transformer transportation
By designing a shock-absorbing shoulder structure for transformer transportation, and utilizing high-strength springs and rubber pads to absorb the impact force during transportation, the structural damage problem caused by bumps and turns during the transportation of large transformers in highway bridge frame structures was solved, ensuring transportation safety.
Patent Information
- Application Number
- CN202520720246.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-04-16
AI Technical Summary
During the transportation of large transformers on highway bridge frames, the instantaneous impact acceleration caused by bumpy road conditions and turns can lead to excessive stress on the transformer tank's internal components or local areas of the tank, which may cause structural deformation or damage and affect transportation safety.
A shock-absorbing shoulder structure for transformer transportation was designed, comprising a shoulder body and a shock-absorbing base. It utilizes components such as high-strength springs, rubber pads, and sliding plates to absorb impact forces through elastic deformation, ensuring the safety of the transformer during transportation.
It effectively mitigates the impact acceleration during transportation, avoids excessive stress and deformation in the internal components of the fuel tank and in localized areas of the fuel tank, and improves transportation safety.
Smart Images
Figure CN223815685U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a shock absorption shoulder seat structure for transformer transportation, especially suitable for the highway bridge type frame transportation mode usually adopted by large transformers, and belongs to the technical field of transformer manufacturing equipment. BACKGROUND
[0002] As the heart of the power grid system, transformers play a vital role in the construction of power grid projects. With the improvement of the scale and technical level of power grid construction, ultra-high voltage transformers and extra-high voltage transformers have been widely used, and the volume and weight of the corresponding transformers are also increasing. The transportation of large transformers from the transformer factory to the power station is extremely difficult, and transportation safety is particularly important in the construction of power grids.
[0003] At present, most large transformers in domestic land transportation adopt the highway bridge type frame transportation mode, which places the shoulder seat structure of the transformer oil tank on the joist of the large transport vehicle, and the transformer oil tank and the shoulder seat, and the shoulder seat and the joist are rigidly connected. When the transport vehicle runs, due to the bumping or turning of the special road conditions, vertical or horizontal instantaneous impact acceleration will be generated, the weight of the transformer oil tank is relatively large, and the instantaneous impact force on the transformer oil tank and the transformer body will be generated, which will cause the local stress of the transformer body and the transformer oil tank to be too large, resulting in large deformation or even damage of the structure, which cannot guarantee the safe transportation of the transformer and reduces the transportation safety. SUMMARY
[0004] The utility model aims at providing a shock absorption shoulder seat structure for transformer transportation, which can effectively alleviate the damage of impact acceleration generated when the road conditions bump or turn, ensure the safety of large transformers in highway transportation, improve the transportation safety, and solve the problems in the background technology.
[0005] The technical scheme of the utility model is:
[0006] A shock absorption shoulder seat structure for transformer transportation comprises a shoulder seat body and a shock absorption base, the shoulder seat body is welded on the outer side of the oil tank wall, a groove-shaped reinforcing iron is welded on the outer side of the oil tank wall, the upper part of the shoulder seat body is welded with the tank rail of the oil tank, and the lower part is welded with the groove-shaped reinforcing iron; the top of the shock absorption base is connected with the shoulder seat body, side rubber pads are respectively arranged on the two sides of the shock absorption base, a sliding plate at the lower part of the shock absorption base is slidingly arranged on the bottom plate of the shock absorption base, a bottom rubber pad is arranged between the sliding plate and the bottom plate of the shock absorption base, a plurality of high-strength springs are arranged between the vertically welded spring positioning end plate on the sliding plate and the bottom plate of the shock absorption base, and the bottom plate of the shock absorption base is lapped on the joist of the transport vehicle.
[0007] The damping base comprises a damping base cover plate, a support plate and a damping base rib plate, the damping base cover plate is connected with the shoulder seat body, the support plate and the spring positioning end plate are arranged in parallel, a plurality of damping base rib plates are arranged at equal intervals between the support plate and the spring positioning end plate, the bottom of the support plate and the damping base rib plate are welded on the sliding plate, and the top of the damping base rib plate is welded on the damping base cover plate.
[0008] The shoulder seat body comprises a shoulder seat cover plate, a trapezoidal rib plate, a back plate, a shoulder seat bottom plate, a rectangular rib plate, a trapezoidal wing plate and a triangular reinforcing iron, the number of the trapezoidal rib plate and the rectangular rib plate is multiple, the multiple trapezoidal rib plates are vertically welded at equal intervals on the outer side of the back plate, the multiple rectangular rib plates are vertically welded at equal intervals on the inner side of the back plate, and the two ends of the trapezoidal rib plate, the rectangular rib plate and the back plate are welded on the shoulder seat cover plate and the shoulder seat bottom plate respectively; the side surface of the outermost rectangular rib plate is welded with the trapezoidal wing plate, and the bottom of the shoulder seat bottom plate is arranged with multiple triangular reinforcing irons at equal intervals, the triangular reinforcing iron is a right-angled triangle, and the two right-angled sides of the triangular reinforcing iron are welded on the shoulder seat bottom plate and the groove-shaped reinforcing iron respectively.
[0009] The damping base bottom plate is an asymmetric U-shaped steel plate comprising a short plate, a bottom plate and a long plate connected in sequence, the short plate and the long plate are vertically arranged at the two ends of the bottom plate respectively, and the bottom rubber pad is clamped between the short plate and the long plate; a plurality of positioning nails are arranged on the outer side of the spring positioning end plate and the inner side of the long plate, the positioning nails on the spring positioning end plate and the positioning nails on the long plate are one-to-one corresponding in position, each positioning nail on the long plate is provided with a positioning ring outside, one end of each high-strength spring is mounted on the positioning nail on the spring positioning end plate, and the other end is mounted between the positioning nail and the positioning ring on the long plate.
[0010] The spring limiting plate is arranged between the spring positioning end plate and the long plate of the damping base bottom plate, the top and the bottom of the spring limiting plate are welded on the damping base cover plate and the sliding plate respectively, a plurality of limiting holes are uniformly arranged on the spring limiting plate, the limiting holes are arranged on the same axis line with the positioning nails and the positioning rings, the diameter is greater than the outer diameter of the high-strength spring, and the high-strength spring is arranged in the limiting hole to limit the high-strength spring through the spring limiting plate.
[0011] The sliding plate, the spring positioning end plate, the support plate and the damping base rib plates at both ends form storage spaces respectively, and the side rubber pads are placed in the storage spaces.
[0012] A bolt blind hole is formed on the upper surface of the damping base cover plate, a bolt through hole is formed on the shoulder seat bottom plate, the bolt blind hole and the bolt through hole are one-to-one corresponding in position, and the damping base cover plate is connected with the shoulder seat bottom plate through the bolt.
[0013] The triangular reinforcing iron can be an isosceles right triangle or a non-isosceles right triangle; when being a non-isosceles right triangle, the short right angle side of the triangular reinforcing iron is vertically welded on the shoulder seat bottom plate, and the long right angle side is welded on the groove-shaped reinforcing iron outside the oil tank wall.
[0014] The groove-shaped reinforcing iron is made of Q355 steel material, the length of which matches the shoulder seat body, and the width of which can accommodate the long right angle side of the triangular reinforcing iron and be welded therewith.
[0015] The trapezoidal wing plate is a right trapezoid, the waist of the right side of which is welded on the oil tank wall, the lower base of the right trapezoid is welded on the rectangular rib plate, and the upper base of the right trapezoid is welded on the adjacent groove-shaped reinforcing iron; the lower base of the right trapezoid is equal to the width of the rectangular rib plate, and the upper base is equal to the depth of the adjacent groove-shaped reinforcing iron.
[0016] The inner side of the shoulder seat cover plate is welded with the oil tank rail, and the width thereof should cover the upper base of the trapezoidal rib plate; the inner side of the shoulder seat bottom plate is welded with the oil tank wall, and the width thereof should hold the lower base of the trapezoidal rib plate.
[0017] The oil tank rail is welded on the upper part of the oil tank wall, and the oil tank rail is welded with the oil tank cover.
[0018] The shoulder seat body and the damping base are made of Q355 steel material except the high-strength spring, the side rubber pad and the bottom rubber pad, and the outer side of the whole structure is sprayed with an anti-corrosion paint layer.
[0019] The utility model discloses the beneficial effect is: convenient installation and dismounting, when the instantaneous impact acceleration in the vertical direction or horizontal direction is generated when jolting or turning, the side rubber pad, the bottom rubber pad and the high-strength spring in the damping base can reduce the impact force received through the elastic deformation of itself, thereby avoiding that the oil tank internal organ body clamp piece and the local position stress and deformation of the oil tank are too large due to jolting or turning in the transportation process of large transformer, ensuring the transportation safety of transformer, and improving transportation safety. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is the overall arrangement schematic diagram of the utility model;
[0021] Figure 2 It is the structure schematic diagram of the utility model;
[0022] Figure 3 It is the shoulder seat body structure schematic diagram of the utility model;
[0023] Figure 4 It is the damping base structure schematic diagram of the utility model;
[0024] Figure 5 It is the local structure schematic diagram of the utility model;
[0025] Figure 6 The utility model discloses a shock-absorbing base bottom plate structure schematic view for the utility model;
[0026] In the figure: oil tank cover 1, oil tank wall 2, oil tank flange 3, groove type reinforcing iron 4, shoulder seat body 5, shoulder seat cover plate 501, trapezoidal rib plate 502, back plate 503, shoulder seat bottom plate 504, rectangular rib plate 505, trapezoidal wing plate 506, triangular reinforcing iron 507, shock-absorbing base 6, shock-absorbing base cover plate 601, high-strength spring 602, shock-absorbing base bottom plate 603, side rubber pad 604, bottom rubber pad 605, sliding plate 606, spring limiting plate 607, spring positioning end plate 608, support plate 609, shock-absorbing base rib plate 610, positioning nail 611, positioning ring 612, bolt 7. DETAILED DESCRIPTION
[0027] The utility model is further explained by examples in combination with the drawings.
[0028] A shock-absorbing shoulder seat structure for transformer transportation includes shoulder seat body 5 and shock-absorbing base 6, shoulder seat body 5 is welded on the outside of oil tank wall 2, groove type reinforcing iron 4 is welded on the outside of oil tank wall 2, the upper portion of shoulder seat body 5 is welded with oil tank flange 3, and the lower portion is welded with groove type reinforcing iron 4; the top of shock-absorbing base 6 is connected with shoulder seat body 5, the two sides of shock-absorbing base 6 are respectively clamped with side rubber pad 604, the lower portion of shock-absorbing base 6 is slidably arranged on shock-absorbing base bottom plate 603, bottom rubber pad 605 is arranged between sliding plate 606 and shock-absorbing base bottom plate 603, a plurality of high-strength springs 602 are arranged between the vertically welded spring positioning end plate 608 on sliding plate 606 and shock-absorbing base bottom plate 603, and shock-absorbing base bottom plate 603 is lapped on the joist of the transport vehicle.
[0029] Shoulder seat body 5 includes shoulder seat cover plate 501, trapezoidal rib plate 502, back plate 503, shoulder seat bottom plate 504, rectangular rib plate 505, trapezoidal wing plate 506 and triangular reinforcing iron 507, the number of trapezoidal rib plate 502 and rectangular rib plate 505 is multiple, multiple trapezoidal rib plates 502 are vertically welded at equal intervals on the outside of back plate 503, and the upper portion is welded to shoulder seat cover plate 501, and the lower portion is welded to shoulder seat bottom plate 504; multiple rectangular rib plates 505 are vertically welded at equal intervals on the inside of back plate 503, and the upper portion is welded to shoulder seat cover plate 501, and the lower portion is welded to shoulder seat bottom plate 504; back plate 503 is vertically welded to shoulder seat cover plate 501 on the upper portion, and is vertically welded to shoulder seat bottom plate 504 on the lower portion; the outermost rectangular rib plate 505 is welded with trapezoidal wing plate 506 on the side, multiple triangular reinforcing irons 507 are arranged at equal intervals on the bottom of shoulder seat bottom plate 504, the triangular reinforcing iron 507 is a right triangle, and the two right-angle sides of triangular reinforcing iron 507 are welded on shoulder seat bottom plate 504 and groove type reinforcing iron 4 respectively.
[0030] The damping base 6 comprises a damping base cover plate 601, high-strength springs 602, a damping base bottom plate 603, side rubber pads 604, bottom rubber pads 605, a sliding plate 606, a spring limiting plate 607, a spring positioning end plate 608, a support plate 609, damping base rib plates 610, positioning nails 611, and positioning rings 612. The damping base cover plate 601 is connected with the shoulder seat body 5. The support plate 609 and the spring positioning end plate 608 are arranged in parallel. A plurality of damping base rib plates 610 are arranged at equal intervals between the support plate 609 and the spring positioning end plate 608. One side long edge of the damping base rib plate 610 is vertically welded to the lower surface of the damping base cover plate 601. One side short edge is welded to the support plate 609. The other side short edge is welded to the spring positioning end plate 608. The bottom of the spring positioning end plate 608, the support plate 609, and the damping base rib plate 610 are welded to the sliding plate 606. The side rubber pads 604 are clamped on both sides of the damping base 6. The bottom rubber pads 605 are arranged between the sliding plate 606 and the damping base bottom plate 603.
[0031] The damping base bottom plate 603 is an asymmetric U-shaped steel plate comprising a short plate, a bottom plate, and a long plate connected in sequence. The short plate and the long plate are vertically arranged at both ends of the bottom plate, respectively. The bottom rubber pads 605 are clamped between the short plate and the long plate. A plurality of positioning nails 611 are welded to the outer side of the spring positioning end plate 608 and the inner side of the long plate. The positioning nails 611 are arranged at equal intervals. The positioning nails 611 on the spring positioning end plate 608 and the positioning nails 611 on the long plate correspond in position one by one. The outer side of each positioning nail 611 on the long plate is provided with a positioning ring 612 arranged on the same axis. One end of each high-strength spring 602 is mounted on the positioning nail 611 on the spring positioning end plate 608. The other end is mounted between the positioning nail 611 and the positioning ring 612 on the long plate.
[0032] The spring limiting plate 607 is arranged between the spring positioning end plate 608 and the long plate of the damping base bottom plate 603. The top and bottom of the spring limiting plate 607 are welded to the damping base cover plate 601 and the sliding plate 606, respectively. A plurality of limiting holes are uniformly arranged on the spring limiting plate 607. The positioning nails 611 and the positioning rings 612 are arranged coaxially with the limiting holes during welding. The diameter is larger than the outer diameter of the high-strength spring 602. The high-strength spring 602 is arranged in the limiting hole. The high-strength spring 602 is limited by the spring limiting plate 607.
[0033] The sliding plate 606, the spring positioning end plate 608, and the support plate 609 form storage spaces between the two ends of the damping base rib plate 610, respectively. The side rubber pads 604 are placed in the storage spaces.
[0034] The upper surface of the damping base cover plate 601 is provided with bolt blind holes, the shoulder seat bottom plate 504 is provided with bolt through holes, the bolt blind holes and the bolt through holes are one-to-one corresponding in position and matched in size with the bolt 7, and the damping base cover plate 601 is connected with the shoulder seat bottom plate 504 through the bolt 7.
[0035] The triangular reinforcing iron 507 can be an isosceles right triangle or a non-isosceles right triangle; when being a non-isosceles right triangle, the short right angle side of the triangular reinforcing iron 507 is vertically welded to the shoulder seat bottom plate 504, and the long right angle side is welded to the groove-shaped reinforcing iron 4 outside the oil tank wall 2.
[0036] The groove-shaped reinforcing iron 4 is made of Q355 steel material, the length thereof is matched with the shoulder seat body 5, and the width thereof can accommodate the long right angle side of the triangular reinforcing iron 507 and is matched with the long right angle side for welding.
[0037] The trapezoidal wing plate 506 is a right trapezoid, the waist of the right angle side is matched with the oil tank wall 2 for welding, the lower base of the right trapezoid is welded to the rectangular rib plate 505, and the upper base of the right trapezoid is welded to the adjacent groove-shaped reinforcing iron; the lower base of the right trapezoid is equal to the width of the rectangular rib plate 505, and the upper base is equal to the depth of the adjacent groove-shaped reinforcing iron.
[0038] The inner side of the shoulder seat cover plate 501 is matched with the oil tank rim 3 for welding, and the width thereof should be able to cover the upper base of the trapezoidal rib plate 502; the inner side of the shoulder seat bottom plate 504 is matched with the oil tank wall 2 for welding, and the width thereof should be able to hold the lower base of the trapezoidal rib plate 502.
[0039] The oil tank rim 3 is welded to the upper part of the oil tank wall 2, and the oil tank rim 3 is welded to the oil tank cover 1.
[0040] The shoulder seat body 5 and the damping base 6 are made of Q355 steel material except the high-strength spring 602, the side rubber pad 604 and the bottom rubber pad 605, and the outer side of the whole structure is sprayed with an anti-corrosion paint layer.
[0041] In practical application, the oil tank cover 1 is welded with the oil tank rim 3; the oil tank rim 3 is welded on the upper part of the oil tank wall 2, the groove-shaped reinforcing iron 4 is welded on the outer side of the oil tank wall 2; the shoulder seat body 5 is welded on the outer side of the oil tank wall 2, the upper part is welded with the oil tank rim 3, the lower part is welded with the groove-shaped reinforcing iron 4 on the outer side of the oil tank wall 2, the waist of the right angle side of the trapezoidal wing plate 506 is matched and welded on the oil tank wall 2, the triangular reinforcing iron 507 is arranged at equal intervals, the long right angle edge is welded on the groove-shaped reinforcing iron 4 on the outer side of the oil tank wall 2; the shoulder seat bottom plate 504 is provided with bolt through holes, the upper part of the damping base cover plate 601 is provided with bolt blind holes, the lower part and the two sides of the damping base 6 are respectively provided with the bottom rubber pad 605 and the side rubber pad 604, the positioning nails on the inner side of the long plate of the damping base bottom plate 603 and the positioning nails of the spring positioning end plate 608 are provided with the high-strength spring 602. The shoulder seat body 5 is connected to the damping base 6 through the bolt 7, and the bottom of the damping base 6 is overlapped on the joist of the large transport vehicle.
[0042] The utility model is suitable for the highway bridge type frame transportation mode usually adopted by large transformer. The shoulder seat body and the damping base adopt the bolt connection mode, which is convenient for installation and dismounting. When the large transformer adopts the highway bridge type frame transportation mode in the driving process, when the instantaneous impact acceleration in the vertical direction or the horizontal direction of the long axis of the transformer is generated due to the bumping, the bottom rubber pad 605 and the side rubber pad 604 can reduce the impact force in the direction through the elastic deformation of the self; when the instantaneous impact acceleration in the horizontal direction of the short axis of the transformer is generated due to the turning, the high-strength spring 602 reduces the impact force in the direction through the corresponding tensile or compression deformation. The utility model can effectively avoid that the stress and deformation of the oil tank internal device body clamp and the local position of the oil tank are too large due to the bumping or turning in the transportation process of the large transformer, ensures the transportation safety of the transformer, and improves the transportation safety.
Claims
1. A shock absorbing shoulder mount structure for transformer transportation, characterized by: The shoulder seat body (5) is welded on the outside of the oil tank wall (2), the outside of the oil tank wall (2) is welded with a groove-shaped reinforcing iron (4), the upper part of the shoulder seat body (5) is welded with the oil tank wall (3), and the lower part is welded with the groove-shaped reinforcing iron (4); the shock-absorbing base (6) is connected with the shoulder seat body (5) at the top, the two sides of the shock-absorbing base (6) are respectively provided with side rubber pads (604), the sliding plate (606) at the lower part of the shock-absorbing base (6) is slidably arranged on the shock-absorbing base bottom plate (603), the bottom rubber pad (605) is arranged between the sliding plate (606) and the shock-absorbing base bottom plate (603), a plurality of high-strength springs (602) are arranged between the vertically welded spring positioning end plate (608) on the sliding plate (606) and the shock-absorbing base bottom plate (603), and the shock-absorbing base bottom plate (603) is lapped on the joist of the transport vehicle.
2. The shock absorbing shoulder mount structure for transformer transportation according to claim 1, characterized in that: The shock-absorbing base (6) comprises a shock-absorbing base cover plate (601), a support plate (609) and a shock-absorbing base rib plate (610), the shock-absorbing base cover plate (601) is connected with the shoulder seat body (5), the support plate (609) and the spring positioning end plate (608) are arranged in parallel, a plurality of shock-absorbing base rib plates (610) are arranged at equal intervals between the support plate (609) and the spring positioning end plate (608), the bottom of the support plate (609) and the shock-absorbing base rib plate (610) are welded on the sliding plate (606), and the top of the shock-absorbing base rib plate (610) is welded on the shock-absorbing base cover plate (601).
3. The shock absorbing shoulder mount structure for transformer transportation according to claim 2, characterized in that: The shoulder seat body (5) comprises a shoulder seat cover plate (501), a trapezoidal rib plate (502), a back plate (503), a shoulder seat bottom plate (504), a rectangular rib plate (505), a trapezoidal wing plate (506) and a triangular reinforcing iron (507), the number of the trapezoidal rib plate (502) and the rectangular rib plate (505) is multiple, a plurality of trapezoidal rib plates (502) are vertically welded at equal intervals on the outside of the back plate (503), a plurality of rectangular rib plates (505) are vertically welded at equal intervals on the inside of the back plate (503), and the two ends of the trapezoidal rib plate (502), the rectangular rib plate (505) and the back plate (503) are welded on the shoulder seat cover plate (501) and the shoulder seat bottom plate (504) respectively; the outermost rectangular rib plate (505) is welded with a trapezoidal wing plate (506) on the side, a plurality of triangular reinforcing irons (507) are arranged at equal intervals at the bottom of the shoulder seat bottom plate (504), the triangular reinforcing iron (507) is a right-angled triangle, and the two right-angled sides of the triangular reinforcing iron (507) are welded on the shoulder seat bottom plate (504) and the groove-shaped reinforcing iron (4) respectively.
4. The shock absorbing shoulder mount structure for transformer transportation according to claim 2, characterized in that: The shock-absorbing base bottom plate (603) is a non-symmetrical U-shaped steel plate, comprising a short plate, a bottom plate and a long plate connected in sequence, the short plate and the long plate being vertically arranged at two ends of the bottom plate respectively, and the bottom rubber pad (605) being clamped between the short plate and the long plate; a plurality of positioning nails (611) are arranged on the outer side of the spring positioning end plate (608) and the inner side of the long plate, the positioning nails (611) on the spring positioning end plate (608) and the positioning nails (611) on the long plate corresponding to each other in position, and a positioning ring (612) being arranged outside each positioning nail (611) on the long plate, one end of each high-strength spring (602) being mounted on the positioning nail (611) on the spring positioning end plate (608) and the other end being mounted between the positioning nail (611) on the long plate and the positioning ring (612).
5. The shock absorbing shoulder mount structure for transformer transportation according to claim 4, characterized in that: The spring limiting plate (607) is arranged between the spring positioning end plate (608) and the long plate of the shock-absorbing base bottom plate (603), the top and the bottom of the spring limiting plate (607) being welded to the shock-absorbing base cover plate (601) and the sliding plate (606) respectively, a plurality of limiting holes being uniformly arranged on the spring limiting plate (607), the limiting holes being coaxially arranged with the positioning nails (611) and the positioning rings (612) and having a diameter greater than the outer diameter of the high-strength spring (602), and the high-strength spring (602) being arranged in the limiting hole.
6. The shock absorbing shoulder mount structure for transformer transportation according to claim 2, characterized in that: The sliding plate (606), the spring positioning end plate (608) and the support plate (609) and the shock-absorbing base rib plates (610) at two ends form storage spaces therebetween, and the side rubber pads (604) are placed in the storage spaces.
7. The shock absorbing shoulder mount structure for transformer transportation according to claim 3, characterized in that: A bolt blind hole is formed in the upper surface of the shock-absorbing base cover plate (601), a bolt through hole is formed in the shoulder seat bottom plate (504), the bolt blind hole and the bolt through hole corresponding to each other in position, and the shock-absorbing base cover plate (601) is connected with the shoulder seat bottom plate (504) through the bolt (7).
8. The shock absorbing shoulder mount structure for transformer transportation according to claim 3, characterized in that: The trapezoidal wing plate (506) is a right trapezoid, the waist of the right angle side being welded to the oil tank wall (2), the lower base of the right trapezoid being welded to the rectangular rib plate (505), and the upper base of the right trapezoid being welded to the adjacent groove-shaped reinforcing iron; the lower base of the right trapezoid is equal to the width of the rectangular rib plate (505), and the upper base is equal to the depth of the adjacent groove-shaped reinforcing iron.