Electric power tower safety protection rigid T-shaped guide rail multidirectional locking connection structure

Abstract

A safety protection rigid T-shaped guide rail multidirectional locking connection structure of an electric power tower comprises T-shaped steel and a locking connection structure, the T-shaped guide rail is formed by connecting a preset number of T-shaped steel through the locking connection structure, the T-shaped steel comprises a wing plate and a web plate, the wing plate and the web plate are integrally formed to form a T-shaped structure, and the T-shaped structure is connected with the locking connection structure. The wing plates are in bilateral symmetry with the web as the symmetry axis, the center lines of the wing plates and the center line of the web are located in the same vertical plane, and the locking connecting structure is arranged at the joint of the T-shaped steel and comprises a transverse locking structure, a vertical locking structure and an axial locking structure. The T-shaped steel can be effectively locked in the transverse direction, the vertical direction and the axial direction, and the technical problems that the surface of a wing plate at the connecting position of the electric tower safety protection rigid T-shaped guide rail is uneven, the two sides are staggered left and right, and disengagement occurs due to infirm connection are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric power equipment, more specifically, it is a kind of electric power tower safety protection rigid T-shaped guide rail multidirectional locking connection structure. BACKGROUND

[0002] With the rapid development of China's economy, the requirement of electric power line is gradually enhanced, so the maintenance of electric power line is more and more frequent, therefore, the state has introduced safety protection standard: "self-locking device with rigid guide rail for fall protection", standard code: GB 24542-2023, to meet the standard, rigid guide rail is needed, the prior art adopts T-shaped rail, but the connecting portion of the prior art T-shaped rail often has the technical problems of uneven surface of wing plate, left-right misalignment of wing plate and insecure connection, one is uneven surface of wing plate at connecting portion, two is left-right misalignment of wing plate at connecting portion, so that the anti-falling device cannot slide normally, and serious safety accidents often occur, which causes personal injury to electric power maintenance personnel, and the electric power line also has safety risk. SUMMARY

[0003] To solve the above problems, the utility model provides a kind of electric power tower safety protection rigid T-shaped guide rail multidirectional locking connection structure, effectively solve the uneven surface of wing plate at the connecting portion of electric power tower safety protection rigid T-shaped guide rail, left-right misalignment of wing plate and insecure connection and the technical problems of disengagement, so that the anti-falling device can slide normally, greatly reduce the occurrence of safety accidents, and solve the line safety risk caused by insecure connection of safety protection rigid T-shaped guide rail, and the specific scheme is as follows:

[0004] The electric power tower safety protection rigid T-shaped guide rail multidirectional locking connection structure, including T-shaped steel and locking connection structure, the T-shaped guide rail is connected by a predetermined number of T-shaped steel by locking connection structure, the T-shaped steel includes wing plate and web, the wing plate and web are integrally formed to constitute T-shaped structure, the wing plate is symmetrical on both sides of web with web as symmetry axis, the center line of wing plate and the center line of web are in the same vertical plane, the locking connection structure is arranged at the connecting portion of T-shaped steel, the locking connection structure includes horizontal locking structure, vertical locking structure and axial locking structure.

[0005] The transverse locking structure comprises a wing plate, a wing plate protrusion and a wing plate recess, the middle part of one end of the wing plate is provided with the wing plate protrusion, the center line of the wing plate protrusion is the same as the center line of the wing plate, the front part of the wing plate protrusion is shaped as an isosceles trapezoidal structure, the rear end of the wing plate protrusion is shaped as a rectangular structure, the isosceles trapezoidal structure, the rectangular structure and the wing plate are integrated, the long side direction of the rectangular structure is perpendicular to the axis of the wing plate, the short side direction of the rectangular structure is the same as the axis of the wing plate, the vertical plane of the wing plate where the short side of the rectangular structure is located is the transverse locking surface of the transverse locking structure, the long side length of the rectangular structure is equal to the length of the lower base of the isosceles trapezoidal structure, and is equal to half of the width of the wing plate, the length of the upper base of the isosceles trapezoidal structure is equal to the thickness of the web plate.

[0006] The other end of the wing plate is provided with the wing plate recess, the shape and size of the wing plate recess are the same as those of the wing plate protrusion, and the center line of the wing plate recess is the same as that of the wing plate protrusion.

[0007] The vertical locking structure comprises a web plate, a web plate protrusion and a web plate recess, the middle part of one end of the web plate is provided with the web plate protrusion, the web plate protrusion is shaped as a right-angled trapezoidal structure, the right-angled waist of the right-angled trapezoidal structure is close to the wing plate side, and the wing plate and the right-angled waist together form a vertical locking clamping groove, the vertical width of the vertical locking clamping groove is one fourth of the width of the web plate, and the length of the bottom edge of the right-angled trapezoidal structure is equal to half of the width of the web plate.

[0008] The other end of the web plate is provided with the web plate recess, the shape and size of the web plate recess are the same as those of the web plate protrusion, the right-angled waist of the web plate recess is on the same horizontal line as the right-angled waist of the web plate protrusion, the right-angled waist of the web plate recess is close to the wing plate side, and the wing plate and the right-angled waist together form a vertical locking clamping block, and the vertical locking clamping block and the vertical locking clamping groove are in full engagement.

[0009] The axial locking structure comprises a locking clamping hole and a locking clamping pin, the locking clamping pin is arranged in the locking clamping hole, the locking clamping hole comprises a locking clamping groove I and a locking clamping groove II, the locking clamping groove I is arranged in the middle part of the right-angled waist of the right-angled trapezoidal structure, and the locking clamping groove II is arranged in the middle part of the lower edge of the vertical locking clamping block.

[0010] The transverse locking structure, the vertical locking structure and the axial locking structure are arranged, so that the T-shaped steel can be effectively locked in the transverse direction, the vertical direction and the axial direction, the technical problems that the surface of the wing plate of the rigid T-shaped guide rail connection part of the power tower safety protection is uneven, the left and right sides are misaligned and the connection is not firm and the falling prevention device can normally slide through are solved, the occurrence of safety accidents is greatly reduced, the line safety risk caused by the insecure connection of the rigid T-shaped guide rail of the safety protection is solved, and the safety of the power line maintenance is ensured.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0011] BRIEF DESCRIPTION OF DRAWINGS Figure 1 is the structure schematic view of the embodiment 1 of the utility model, and

[0012] BRIEF DESCRIPTION OF DRAWINGS Figure 2 is the structure schematic view of the embodiment 1 of the utility model, Figure 1

[0013] BRIEF DESCRIPTION OF DRAWINGS Figure 3 is the structure schematic view of the embodiment 2 of the utility model,

[0014] BRIEF DESCRIPTION OF DRAWINGS Figure 4 is the structure schematic view of the embodiment 2 of the utility model, Figure 3

[0015] 1. wing plate, 2. web, 3. wing plate protrusion, 4. web protrusion, 5. connecting through hole, 6. wing plate groove, 7. web groove, 8. locking slot I, 9. locking slot II, 10. vertical clamping web, 11. horizontal clamping wing, 12. horizontal clamping web, 13. axial locking hole. DETAILED DESCRIPTION

[0016] The utility model is further described in detail in conjunction with attached Figure 1 , attached Figure 2 , attached Figure 3 and attached Figure 4 , so that the public can better grasp the implementation method of the utility model, and the specific implementation scheme of the utility model is as follows:

[0017] Embodiment 1

[0018] Further described in conjunction with attached Figure 1 and attached Figure 2 , the described electric power pole tower safety protection rigid T-shaped guide rail multidirectional locking connection structure includes T-shaped steel and locking connection structure, the T-shaped guide rail is connected by the locking connection structure by the predetermined number of T-shaped steel, the T-shaped steel includes wing plate 1 and web 2, the wing plate 1 and web 2 are integrally formed and constitute T-shaped structure, the wing plate 1 is symmetrical to the left and right sides with web 2 as the symmetry axis, the center line of the wing plate 1 and the center line of web 2 are in the same vertical plane, the locking connection structure is arranged at the connecting place of T-shaped steel, the locking connection structure includes horizontal locking structure, vertical locking structure and axial locking structure.

[0019] ​The transverse locking structure comprises a wing plate 1, a wing plate protrusion 3 and a wing plate groove 6, the middle of one end of the wing plate 1 is provided with the wing plate protrusion 3, the center line of the wing plate protrusion 3 is the same as the center line of the wing plate 1, the front part of the wing plate protrusion 3 is provided in the shape of an isosceles trapezoidal structure, the rear end of the wing plate protrusion 3 is provided in the shape of a rectangular structure, the isosceles trapezoidal structure, the rectangular structure and the wing plate 1 are an integral structure, the long side direction of the rectangular structure is perpendicular to the axis of the wing plate 1, the short side direction of the rectangular structure is the same as the axis of the wing plate 1, the vertical plane of the wing plate 1 where the short side of the rectangular structure is located is the transverse locking surface of the transverse locking structure, the long side length of the rectangular structure is equal to the length of the lower base of the isosceles trapezoidal structure, and is equal to half of the width of the wing plate 1, the length of the upper base of the isosceles trapezoidal structure is equal to the thickness of the web plate 2;

[0020] The other end of the wing plate 1 is provided with the wing plate groove 6, the shape and size of the wing plate groove 6 are the same as those of the wing plate protrusion 3, and the center line of the wing plate groove 6 is the same as that of the wing plate protrusion 3;

[0021] The wing plate groove 6 corresponds in position to the wing plate protrusion 3, when two T-shaped steels are connected, the wing plate protrusion 3 is inserted into the wing plate groove 6 to fill the groove, the transverse locking surface plays a transverse locking role on the wing plate 1, blocks the transverse movement of the wing plate, ensures smooth connection of the left and right sides of the wing plate 1, solves the technical problem of dislocation of the left and right sides of the wing plate 1, and ensures that the web plate 2 is centrally aligned;

[0022] The vertical locking structure comprises a web plate 2, a web plate protrusion 4 and a web plate groove 7, the middle of one end of the web plate 2 is provided with the web plate protrusion 4, the web plate protrusion 4 is provided in the shape of a right-angled trapezoidal structure, the right-angled waist of the right-angled trapezoidal structure is close to one side of the wing plate 1 and forms a vertical locking slot together with the wing plate 1, the vertical width of the vertical locking slot is set to be one fourth of the width of the web plate 2, and the length of the bottom side of the right-angled trapezoidal structure is equal to half of the width of the web plate 2;

[0023] The other end of the web plate 2 is provided with the web plate groove 7, the shape and size of the web plate groove 7 are the same as those of the web plate protrusion 4, the right-angled waist of the web plate groove 7 is on the same horizontal line as the right-angled waist of the web plate protrusion 4, the right-angled waist of the web plate groove 7 is close to one side of the wing plate 1 and forms a vertical locking block together with the wing plate 1, the vertical locking block is in fill fit with the vertical locking slot, when two T-shaped steels are connected, the vertical locking block is in fill fit in the vertical locking slot, plays a vertical locking role on the wing plate 1, ensures smooth connection of the surface of the wing plate 1, and solves the technical problem of uneven connection of the surface of the wing plate 1;

[0024] The axial locking structure comprises a locking clamping hole and a locking clamping pin, the locking clamping pin is arranged in the locking clamping hole, the locking clamping hole comprises a locking clamping groove I 8 and a locking clamping groove II 9, the locking clamping groove I 8 is arranged at the middle of the right angle waist of the right angle trapezoidal structure, the locking clamping groove II 9 is arranged at the middle of the lower edge of the vertical locking clamping block, the positions of the locking clamping groove I 8 and the locking clamping groove II 9 correspond to each other, when two T-shaped steels are connected, the locking clamping groove I 8 and the locking clamping groove II 9 are aligned together to form the locking clamping hole, the locking clamping pin arranged in the locking clamping hole plays a role in axial locking of the wing plate 1, ensures the firm connection of the wing plate 1, solves the technical problem of axial disconnection of the wing plate 1, and avoids the occurrence of a gap at the connection position to cause connection misalignment.

[0025] The side, away from the wing plate 1, of the web plate 2 is provided with a preset number of connecting through holes 5, when a preset number of T-shaped steels are connected to form the power tower safety protection rigid T-shaped guide rail, connecting bolts are passed through the connecting through holes 5 and connected and fixed with the tower body;

[0026] Embodiment 2

[0027] According to the accompanying drawings Figure 3 and the accompanying drawings Figure 4 Further described, the multi-directional locking connection structure of the power tower safety protection rigid T-shaped guide rail comprises a T-shaped steel and a locking connection structure, the T-shaped guide rail is formed by a predetermined number of T-shaped steels connected through the locking connection structure, the T-shaped steel comprises a wing plate 1 and a web plate 2, the wing plate 1 and the web plate 2 are integrally formed to form a T-shaped structure, the wing plate 1 is symmetrical on both sides of the web plate 2 as the symmetry axis, the center line of the wing plate 1 and the center line of the web plate 2 are in the same vertical plane, and the locking connection structure is arranged at the connection position of the T-shaped steel.

[0028] The horizontal locking structure comprises a wing plate 1 and a web plate 2, one end of the wing plate 1 is provided with a wing plate clamping block on the left side of the center line, the wing plate clamping block is an integral structure with the wing plate 1, and a wing plate clamping space corresponding to the wing plate clamping block is arranged on the right side, the other end of the wing plate 1 is provided with a wing plate clamping block on the right side of the center line, and a wing plate clamping space corresponding to the wing plate clamping block is arranged on the left side, the wing plate clamping space is a space structure formed by cutting the wing plate 1 according to the size and shape of the wing plate clamping block, the size and shape of the wing plate clamping block are the same as those of the wing plate clamping space, the horizontal width of the wing plate clamping block is half of the width of the wing plate 1, the thickness of the wing plate clamping block is equal to the thickness of the wing plate 1, the axial length of the wing plate clamping block is a preset number, and the surface of the wing plate clamping block on the center line is a horizontal clamping wing surface 11.

[0029] The center line right side of one end of the web plate 2 is provided with a web plate clamping block, the web plate clamping block is an integral structure with the web plate 2, and the left side corresponding to the web plate clamping block is provided with a web plate clamping space. The center line left side of the other end of the web plate 2 is provided with a web plate clamping block, and the right side corresponding to the web plate clamping block is provided with a web plate clamping space. The web plate clamping space is formed by cutting the web plate 2 according to the size and shape of the web plate clamping block. The size and shape of the web plate clamping block are the same as those of the web plate clamping space. The transverse width of the web plate clamping block is half the thickness of the web plate 2. The vertical length of the web plate clamping block is equal to the width of the web plate 2. The axial length of the web plate clamping block is equal to the axial length of the wing plate clamping block. The surface of the web plate clamping block on the center line is a transversely clamped web surface 12.

[0030] The transversely clamped wing surface 11 and the transversely clamped web surface 12 are in the same vertical plane. When the two T-shaped steels are connected, the transversely clamped wing surfaces 11 and the transversely clamped web surfaces 12 of the two T-shaped steels are overlapped together, which plays a role in transversely locking the wing plate 1, blocks the transverse movement of the wing plate 1, ensures smooth connection of the left and right sides of the wing plate 1, solves the technical problem of misalignment of the left and right sides of the wing plate 1, and ensures that the web plate 2 is centrally aligned.

[0031] The vertically locking structure includes the wing plate 1, the web plate 2, the wing plate clamping block provided at both ends of the wing plate 1, and the web plate clamping block provided at both ends of the web plate 2. The upper end surface of the web plate clamping block is provided with a vertically clamped web surface 10. The vertically clamped web surface 10 is in the same plane as the lower bottom surface of the wing plate 1. When the two T-shaped steels are connected, the vertically clamped web surface 10 abuts against the lower bottom surface of the wing plate 1, which plays a role in vertically locking the wing plate 1, ensures smooth connection of the surface of the wing plate 1, and solves the technical problem of uneven connection of the surface of the wing plate 1.

[0032] The axial locking structure includes the web plate 2 and the web plate clamping block provided at both ends of the web plate 2. The lower part of the web plate clamping block is provided with an axial locking hole 13. The axial locking hole 13 is provided with a locking clamping pin. When the two T-shaped steels are connected, the locking clamping pin provided in the axial locking hole 13 plays a role in axially locking the wing plate 1 of the two T-shaped steels, ensures firm connection of the wing plate 1, solves the technical problem of axial separation of the wing plate 1, and avoids misalignment caused by gaps at the connection;

[0033] The side of the web plate 2 away from the wing plate 1 is provided with a predetermined number of connecting through holes 5. When a predetermined number of T-shaped steels are connected to form a power pole tower safety protection rigid T-shaped guide rail, connecting bolts are passed through the connecting through holes 5 to be connected and fixed with the tower body.

[0034] When the preset number of T-shaped steel connection forms the power tower safety protection rigid T-shaped guide rail, the transverse locking structure, the vertical locking structure and the axial locking structure simultaneously lock the wing plate 1 at the connection of the T-shaped steel in three directions, ensure the smooth connection of the wing plate 1, effectively solve the technical problems of uneven surface, left and right misalignment and loose connection of the wing plate 1 at the connection of the power tower safety protection rigid T-shaped guide rail, so that the anti-falling device can normally slide, greatly reduce the occurrence of safety accidents, and solve the line safety risk caused by the loose connection of the safety protection rigid T-shaped guide rail.

Claims

1. A power tower safety protection rigid T-shaped guide rail multidirectional locking connection structure, comprising a T-shaped steel and a locking connection structure, characterized in that, The T-shaped guide rail is connected by a predetermined number of T-shaped steels through a locking connection structure, the T-shaped steel comprises a wing plate (1) and a web plate (2), the wing plate (1) and the web plate (2) are integrally formed to form a T-shaped structure, the wing plate (1) is symmetrical on both sides of the web plate (2) as the symmetry axis, the center line of the wing plate (1) and the center line of the web plate (2) are in the same vertical plane, the locking connection structure is arranged at the connecting position of the T-shaped steel, the locking connection structure comprises a horizontal locking structure, a vertical locking structure and an axial locking structure.

2. The rigid T-shaped rail multi-directional locking connection structure for power tower safety protection according to claim 1, characterized in that, The horizontal locking structure comprises the wing plate (1), a wing plate protrusion (3) and a wing plate groove (6), the middle of one end of the wing plate (1) is provided with the wing plate protrusion (3), the center line of the wing plate protrusion (3) is the same as the center line of the wing plate (1), the front part of the wing plate protrusion (3) is provided in the shape of an isosceles trapezoidal structure, the rear end of the wing plate protrusion (3) is provided in the shape of a rectangular structure, the isosceles trapezoidal structure, the rectangular structure and the wing plate (1) are an integral structure, the long side direction of the rectangular structure is perpendicular to the axis of the wing plate (1), the short side direction of the rectangular structure is the same as the axis of the wing plate (1), the vertical plane of the wing plate (1) where the short side of the rectangular structure is located is the horizontal locking surface of the horizontal locking structure, the long side length of the rectangular structure is equal to the length of the lower base of the isosceles trapezoidal structure, and is equal to half of the width of the wing plate (1), the length of the upper base of the isosceles trapezoidal structure is equal to the thickness of the web plate (2); The other end of the wing plate (1) is provided with the wing plate groove (6), the shape and size of the wing plate groove (6) are the same as those of the wing plate protrusion (3), and the center line of the wing plate groove (6) is the same as that of the wing plate protrusion (3).

3. The rigid T-shaped guide rail multi-directional locking connection structure for power tower safety protection according to claim 2, characterized in that, The wing plate groove (6) corresponds to the position of the wing plate protrusion (3), when two T-shaped steels are connected, the wing plate protrusion (3) is inserted into the wing plate groove (6) to fill the wing plate (1) and play a horizontal locking role.

4. The rigid T-shaped rail multi-directional locking connection structure for electrical tower safety protection according to claim 1, characterized in that, The vertical locking structure comprises the web plate (2), a web plate protrusion (4) and a web plate groove (7), one end of the web plate (2) is provided with the web plate protrusion (4), the web plate protrusion (4) is provided in the shape of a right-angled trapezoidal structure, the right-angled waist of the right-angled trapezoidal structure is close to the side of the wing plate (1), and together with the wing plate (1) forms a vertical locking clamping groove, the vertical width of the vertical locking clamping groove is set to be one fourth of the width of the web plate (2), and the length of the bottom edge of the right-angled trapezoidal structure is equal to half of the width of the web plate (2).

5. The rigid T-shaped rail multi-directional locking connection structure for electrical tower safety protection according to claim 4, characterized in that, The other end of the web plate (2) is provided with the web plate groove (7), the shape and size of the web plate groove (7) are the same as those of the web plate protrusion (4), the right-angled waist of the web plate groove (7) is on the same horizontal line as the right-angled waist of the web plate protrusion (4), the right-angled waist of the web plate groove (7) is close to the side of the wing plate (1), and together with the wing plate (1) forms a vertical locking clamping block, the vertical locking clamping block is in filling cooperation with the vertical locking clamping groove, when two T-shaped steels are connected, the vertical locking clamping block is filled and clamped in the vertical locking clamping groove, and plays a vertical locking role on the wing plate (1).

6. The rigid T-rail multidirectional locking connection structure for electrical tower safety guard according to claim 1, characterized in that, The axial locking structure comprises a locking clamping hole and a locking clamping pin, the locking clamping pin is arranged in the locking clamping hole, the locking clamping hole comprises a locking clamping groove I (8) and a locking clamping groove II (9), the locking clamping groove I (8) is arranged at the middle of the right-angle waist of the right-angle trapezoidal structure, the locking clamping groove II (9) is arranged at the middle of the lower edge of the vertical locking clamping block, the positions of the locking clamping groove I (8) and the locking clamping groove II (9) correspond to each other, when the two T-shaped steels are connected, the locking clamping groove I (8) and the locking clamping groove II (9) are aligned together to form the locking clamping hole, and the locking clamping pin arranged in the locking clamping hole plays an axial locking role on the wing plate (1).

7. The rigid T-rail multidirectional locking connection structure for electrical tower safety guard according to claim 1, characterized in that, The transverse locking structure comprises a wing plate (1) and a web plate (2), one end of the wing plate (1) is provided with a wing plate clamping block on the left side of the center line, the wing plate clamping block is an integral structure with the wing plate (1), and a wing plate clamping space is arranged on the right side corresponding to the wing plate clamping block, the other end of the wing plate (1) is provided with a wing plate clamping block on the right side of the center line, and a wing plate clamping space is arranged on the left side corresponding to the wing plate clamping block, the wing plate clamping space is a space structure formed by cutting the wing plate (1) according to the size and shape of the wing plate clamping block, the size and shape of the wing plate clamping block are the same as those of the wing plate clamping space, the transverse width of the wing plate clamping block is half of the width of the wing plate (1), the thickness of the wing plate clamping block is equal to the thickness of the wing plate (1), the axial length of the wing plate clamping block is a preset number, and the surface of the wing plate clamping block on the center line is a transverse clamping wing surface (11). The transverse locking structure comprises a wing plate (1) and a web plate (2), one end of the wing plate (1) is provided with a wing plate clamping block on the left side of the center line, the wing plate clamping block is an integral structure with the wing plate (1), and a wing plate clamping space is arranged on the right side corresponding to the wing plate clamping block, the other end of the wing plate (1) is provided with a wing plate clamping block on the right side of the center line, and a wing plate clamping space is arranged on the left side corresponding to the wing plate clamping block, the wing plate clamping space is a space structure formed by cutting the wing plate (1) according to the size and shape of the wing plate clamping block, the size and shape of the wing plate clamping block are the same as those of the wing plate clamping space, the transverse width of the wing plate clamping block is half of the width of the wing plate (1), the thickness of the wing plate clamping block is equal to the thickness of the wing plate (1), the axial length of the wing plate clamping block is a preset number, and the surface of the wing plate clamping block on the center line is a transverse clamping wing surface (11).

8. The rigid T-rail multidirectional locking connection structure for electrical tower safety guard according to claim 1, characterized in that, The vertical locking structure comprises a wing plate (1), a web plate (2), wing plate clamping blocks arranged at two ends of the wing plate (1) and web plate clamping blocks arranged at two ends of the web plate (2), and an upper end surface of the web plate clamping block is provided with a vertical clamping web surface (10), the vertical clamping web surface (10) is in the same plane as the lower bottom surface of the wing plate (1), when the two T-shaped steels are connected, the vertical clamping web surface (10) abuts against the lower bottom surface of the wing plate (1), and plays a vertical locking role on the wing plate (1).

9. The rigid T-rail multidirectional locking connection structure for electrical tower safety guard according to claim 1, characterized in that, The axial locking structure comprises a web plate (2) and web plate clamping blocks arranged at both ends of the web plate (2), the lower part of the web plate clamping block is provided with an axial locking hole (13), and a locking clamping pin is arranged in the axial locking hole (13), when two T-shaped steels are connected, the locking clamping pin arranged in the axial locking hole (13) plays an axial locking role on the wing plates (1) of the two T-shaped steels.

Images