A rail lifting anti-skid device, a lifting device and a lifting method

Abstract

This invention relates to the field of I-beam rail hoisting technology, specifically to an anti-slip device, hoisting apparatus, and hoisting method for hoisting rails. The anti-slip device includes a set screw and a concave clamping plate. The two free ends of the concave clamping plate are respectively provided with an upper hook and a lower hook facing its inner cavity, thus constructing the inner cavity of the concave clamping plate into a cavity capable of accommodating the I-beam rail. A threaded hole is formed on the side of the concave clamping plate away from the upper and lower hooks. The set screw is screwed into the threaded hole, and one end of the set screw extends into the cavity. A fastener slot is formed on the top of the concave clamping plate. The axial dimension of the fastener slot is larger than the dimension of the rail. This invention's anti-slip device for hoisting rails not only improves the limiting strength of the rail clamps along the length of the rail, eliminating the safety hazard of the rail clamps vibrating and slipping on the rail, but also meets the hoisting requirements of rails of different widths and can be disassembled and reused.

Description

Technical Field

[0001] This invention relates to the field of I-beam rail hoisting technology, specifically to an anti-slip device, hoisting apparatus, and hoisting method for hoisting rails. Background Technology

[0002] The lifting tool for I-beam rails is generally a rail clamp, such as... Figure 1 As shown, the rail clamp includes a lifting lug 100, a lifting ring, a connecting arm 200, a fastener 300, and multiple pins 400; the top of the lifting lug and the lifting ring are connected by pins and locked with flat washers and cotter pins; the bottom of the lifting lug and the two connecting arms are connected and locked with pins; the two fasteners are cross-connected and then connected to the two connecting arms to form a rhomboid hinge structure; the hooks at the bottom of the two fasteners correspond to each other, so that the entire rail clamp is in a state of mutual linkage.

[0003] The rail clamp is based on the "I"-shaped structure of the rail. When the two clamps are closed, the inside also presents an "I" shape, so that the rail and the inner wall of the hook of the two clamps are fully fitted. At the same time, the structure is cleverly designed so that the greater the lifting weight, the stronger the clamping of the rail.

[0004] During hoisting, first clamp the two rail clamps on both ends of the rail to be hoisted, and lock the upper movable lifting ring in the wire rope buckle. After slowly lifting and keeping the wire rope taut, the rigging personnel can leave the hoisting operation area. Only after confirming that the lifting equipment is secure can the hoisting operation be instructed.

[0005] However, during rail hoisting operations, the distance between the two rail clamps is relatively large. This distance generates a force concentrated towards the center, and the greater the distance, the greater the force. This can cause the rail clamps to slip during the transfer process after hoisting, resulting in the rail tilting to one side and becoming unbalanced, posing a safety hazard of vibration and slippage. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an anti-slip device, a lifting device and a lifting method for lifting rails, which solves the technical problem that the rail clamps are prone to slipping on the rails when lifting rails using rail clamps.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the anti-slip device for hoisting steel rails of the present invention includes a top screw and a concave clamping plate;

[0010] The concave clamp is provided with an upper hook and a lower hook facing its inner cavity at its two free ends, so that the inner cavity of the concave clamp is constructed as a cavity that can accommodate the I-shaped steel rail.

[0011] The concave plate has a threaded hole on the side away from the upper hook and the lower hook; the set screw is screwed into the threaded hole, and one end of the set screw extends into the cavity;

[0012] The top of the concave plate is provided with a fastener slot; the dimension of the fastener slot in the axial direction of the top screw is larger than the dimension of the rail.

[0013] Optionally, the concave clamping plate includes an upper clamping plate, a side plate, and a lower clamping plate that are connected in a concave sequence;

[0014] The side plate is hinged to the upper plate so that the upper plate can rotate about its hinge axis;

[0015] The axis of the set screw is perpendicular to the hinge axis.

[0016] Optionally, the side plate and the upper plate are hinged together by a hinge;

[0017] The hinge axis is located on the top surface of the side plate.

[0018] Optionally, both the upper hook and the lower hook include a bonding plate and a tail plate;

[0019] One end of the bonding plate is connected to the free end of the upper plate or the free end of the lower plate, and the other end is connected to the tail plate.

[0020] In the clamping state, the fitting plate, the upper clamping plate, the lower clamping plate, the top screw, and the tail plate of the lower hook are all in contact with the rail surface; the tail plate of the upper hook is in contact with the rail line surface.

[0021] Optionally, the dimension of the rail along the axial direction of the set screw is not greater than the dimension of the cavity, so that the rail can slide along the axial direction of the set screw inside the cavity.

[0022] Optionally, a self-locking nut is screwed onto the set screw;

[0023] The self-locking nut abuts against the side of the concave plate opposite to the cavity.

[0024] Optionally, the concave plate is provided with multiple threaded holes;

[0025] Each of the set screws is screwed into one of the threaded holes.

[0026] Optionally, the top, web, and bottom of the rail are respectively abutted against the three set screws.

[0027] Furthermore, the present invention also provides a hoisting device, the hoisting device including the anti-slip device for hoisting steel rails as described above, and the hoisting device further including rail clamps;

[0028] In the hoisting state, the clamping device of the rail clamp engages with the clamping device slot along the length of the rail.

[0029] Furthermore, the present invention also provides a hoisting method, which is implemented based on the hoisting device described above, and the hoisting method includes:

[0030] S1. Insert the concave clamping plate from one side of the rail, so that the concave clamping plate is fitted onto the lifting point on the rail; install the set screw onto the threaded hole, tighten the set screw, so that the set screw abuts against the web of the rail;

[0031] S2. Continue to turn the top screw, so that the top screw pushes the concave plate to move along the axial direction of the top screw until the top of the rail engages with the upper hook and the bottom of the rail engages with the lower hook.

[0032] S3. Based on S1 and S2, install another anti-slip device for the hoisting rail at the hoisting point on the other side of the rail.

[0033] S4. The clamping devices of a pair of rail clamps clamp the top of the rail at the corresponding clamping device slots; lift the rail and move it to the preset position.

[0034] (III) Beneficial Effects

[0035] The beneficial effects of this invention are:

[0036] The upper and lower hooks are arranged opposite each other, so that the inner cavity of the concave plate can match the shape of the I-shaped rail, which increases the contact area between the anti-slip device for hoisting the rail and the I-shaped rail, thereby improving the limiting effect and limiting strength of the I-shaped rail.

[0037] The set screw is screwed into the threaded hole, with one end extending into the cavity, allowing it to abut against the rail inside. After abutment, tightening the set screw pushes the concave clamp (or rail) axially along the set screw, ensuring full contact between the rail and the concave clamp, upper hook, and lower hook, thus achieving a stable installation of the anti-slip device for lifting rails on the rail. As the set screw continues to tighten, it applies a preload to the concave clamp, upper hook, and lower hook, further enhancing the stability of the anti-slip device on the rail. Simultaneously, the concave clamp, upper hook, and lower hook form a concave structure. With the preload provided by the set screw, this concave structure can be considered to undergo a certain degree of deformation. The greater the preload of the set screw, the greater the compressive force exerted by the concave structure on the rail. Together with the preload applied by the set screw, this significantly improves the clamping strength and stability of the anti-slip device for lifting rails on the rail.

[0038] The axial dimension of the clamping slot on the set screw is larger than that of the rail, exposing the top of the rail. The clamping slot provides displacement space for the pair of clamps of the rail lifting clamp to clamp and expand in the rail width direction (i.e., axial direction of the set screw), which can accommodate the clamping of rails of various sizes, improving the adaptability of anti-slip devices for lifting rails of different sizes.

[0039] The top of the concave clamp plate has a fastener slot, which is compatible with the fastener of the rail clamp and is used to engage the fastener. This provides a limit for the fastener in the length direction of the rail. Based on the stability of the anti-slip device installed for lifting the rail, the operation is carried out, which effectively avoids the rail clamp slipping on the rail during the lifting process. This prevents the rail from tilting to one side and eliminates the safety hazard of vibration and slippage.

[0040] The anti-slip device for lifting rails has a pre-installed allowance in its cavity, which is eliminated by a set screw. The clamping slot also has a pre-installed allowance to accommodate rail tops of different sizes, but it maintains a constant limit on the clamping device along the length of the rail, ensuring the anti-slip device effectively limits the rail clamp. Therefore, the anti-slip device for lifting rails of this invention not only improves the limiting strength of the rail clamp along the length of the rail, eliminating the safety hazard of the rail clamp vibrating and slipping off the rail, but also meets the lifting needs of rails of different widths and can be disassembled and reused. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the connection between the existing rail clamp and the rail in the clamping state.

[0042] Figure 2 This is a schematic diagram showing the connection between the anti-slip device for hoisting rails and the rail in the clamping state according to the present invention;

[0043] Figure 3 This is a front view of the concave card plate of the present invention;

[0044] Figure 4 This is a top view of the concave card plate of the present invention;

[0045] Figure 5 This is a schematic diagram of the upper plate of the concave plate of the present invention in the open state.

[0046] Explanation of reference numerals in the attached figures

[0047] 1: Top screw; 2: Concave clamping plate; 3: Upper clamping hook; 4: Lower clamping hook; 5: Threaded hole; 6: Clamping device slot; 7: Upper clamping plate; 8: Side plate; 9: Lower clamping plate; 10: Hinge; 11: Fitting plate; 12: Tail plate; 13: Self-locking nut; 14: Rail top; 15: Rail web; 16: Rail bottom;

[0048] 100: Lifting lug; 200: Connecting arm; 300: Fastener; 400: Shaft pin. Detailed Implementation

[0049] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0051] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] See Figures 2 to 5 This invention provides an anti-slip device for hoisting steel rails, comprising a top screw 1 and a concave clamping plate 2; the two free ends of the concave clamping plate 2 are respectively provided with an upper hook 3 and a lower hook 4 facing its inner cavity, so that the inner cavity of the concave clamping plate 2 is constructed as a cavity capable of accommodating an I-shaped steel rail; the concave clamping plate 2 has a threaded hole 5 on the side away from the upper hook 3 and the lower hook 4; the top screw 1 is screwed to the threaded hole 5, and one end of the top screw 1 extends into the cavity; the top of the concave clamping plate 2 has a fastener groove 6; the dimension of the fastener groove 6 in the axial direction of the top screw 1 is larger than the dimension of the steel rail.

[0054] In this embodiment, the concave clamping plate 2, the upper clamping hook 3, and the lower clamping hook 4 are integrated and arranged opposite to each other, so that the inner cavity of the concave clamping plate 2 can match the shape of the I-shaped rail, thereby increasing the contact area between the anti-slip device for hoisting the rail and the I-shaped rail, and thus improving the limiting effect and limiting strength of the I-shaped rail.

[0055] The set screw 1 is screwed into the threaded hole 5, and one end of it extends into the cavity, allowing the set screw 1 to abut against the rail inside the cavity. After abutment, the set screw 1 is tightened further, pushing the concave clamping plate 2 (or the rail) to move axially along the set screw 1. This ensures that the rail makes full contact with the concave clamping plate 2, the upper hook 3, and the lower hook 4, achieving a stable installation of the anti-slip device for lifting rails on the rail. Furthermore, as the set screw 1 is continuously tightened, it applies a preload force to the concave clamping plate 2, the upper hook 3, and the lower hook 4, further enhancing the stability of the anti-slip device for lifting rails on the rail. Meanwhile, the concave clamping plate 2, the upper clamping hook 3 and the lower clamping hook 4 are all concave in shape. After the pre-tightening force is provided by the top screw 1, the concave structure can be regarded as being able to undergo a certain deformation. The greater the pre-tightening force of the top screw 1, the greater the squeezing force of the concave structure on the rail. Together with the pre-tightening force applied by the top screw 1, the clamping strength and stability of the anti-slip device for hoisting rails are greatly improved.

[0056] The dimension of the clamping slot 6 in the axial direction of the set screw 1 is larger than that of the rail, thus exposing the rail top 14. The clamping slot 6 provides displacement space for the pair of clamping devices of the rail lifting clamp in the rail width direction (i.e., in the axial direction of the set screw), which can accommodate the clamping of rails of various sizes, improving the adaptability of the anti-slip device for lifting rails of different sizes.

[0057] The top of the concave clamp plate 2 is provided with a fastener slot 6, which is adapted to the fastener of the rail clamp and used to engage the fastener. It provides a limit for the fastener in the length direction of the rail. Based on the stability of the anti-slip device installed for lifting the rail, the operation is carried out, which effectively avoids the rail clamp slipping on the rail during the lifting process, thereby preventing the rail from tilting to one side and eliminating the safety hazard of vibration and slippage.

[0058] The anti-slip device for lifting rails has a pre-reserved allowance for the workpiece, which is eliminated by the set screw 1. The clamping slot 6 also has a pre-reserved allowance for the clamping device, accommodating rail tops 14 of different sizes, but always maintaining a limiting position on the clamping device along the length of the rail, ensuring the anti-slip device effectively limits the position of the rail clamp. Therefore, the anti-slip device for lifting rails of this invention not only improves the limiting strength of the rail clamp along the length of the rail, eliminating the safety hazard of the rail clamp vibrating and slipping off the rail, but also meets the lifting requirements of rails of different widths, and can be disassembled and reused.

[0059] Furthermore, the concave clamping plate 2 includes an upper clamping plate 7, a side plate 8, and a lower clamping plate 9 connected in a concave sequence; the side plate 8 is hinged to the upper clamping plate 7 so that the upper clamping plate 7 can rotate around its hinge axis; the axis of the set screw 1 is perpendicular to the hinge axis. In this embodiment, the side plate 8 is hinged to the upper clamping plate 7. Firstly, when the lifting 1 applies a pre-tightening force, the hinge responds more sensitively to the pre-tightening force, allowing the hinge to withstand greater pre-stress and improving the clamping strength of the anti-slip device for lifting rails. Secondly, it avoids or reduces the damage to the corners of the concave clamping plate 2 due to excessive deformation, extending the service life of the anti-slip device for lifting rails. Thirdly, before installing the anti-slip device for lifting rails onto the rail, the upper clamping plate 7 can be flipped first to reduce the frictional resistance between the concave clamping plate 2 and the rail, improving the smoothness of installation; after installation to the designated position, the upper clamping plate 7 can be flipped in the opposite direction. Secondly, the axis of the top screw 1 is perpendicular to the hinge axis, which can improve the transmission efficiency of the internal force of the anti-slip device for hoisting rails and reduce the deformation of the concave plate 2. Under the premise of applying the same amount of pre-tightening force to the concave structure, the length of the top screw 1 screwed into the cavity is reduced, thereby reducing the intensity of manual labor and improving the efficiency of operation.

[0060] In addition, the side plate 8 and the upper clamping plate 7 are hinged by a hinge 10; the hinge axis of the hinge 10 is located on the top surface of the side plate 8. Specifically, by setting the hinge axis on the top surface of the side plate 8, the flip angle of the upper clamping plate 7 is increased, allowing the upper clamping plate 7 to be flipped to abut against the end of the top screw 1 that is away from the concave clamping plate 2. This allows for single-handed operation when installing the anti-slip device for hoisting rails on the rails, without the other hand needing to support the upper clamping plate 7. This improves the flexibility of installing the anti-slip device for hoisting rails and the rails, and further reduces the intensity of manual labor.

[0061] Furthermore, both the upper hook 3 and the lower hook 4 include a contact plate 11 and a tail plate 12; one end of the contact plate 11 is connected to the free end of the upper clamping plate 7 or the free end of the lower clamping plate 9, and the other end is connected to the tail plate 12; in the clamping state, the contact plate 11, the upper clamping plate 7, the lower clamping plate 9, the top screw 1, and the tail plate 12 of the lower hook 4 all abut against the surface of the rail, greatly improving the limiting strength and stability; the tail plate 12 of the upper hook 3 abuts against the surface of the rail. In this embodiment, the contact plate 11 and the tail plate 12 of the lower hook 4 are V-shaped as a whole, and are in contact with the side and top surfaces of the rail base 16, ensuring the limiting strength and stability. The upper hook 3's contact plate 11 and tail plate 12 are L-shaped. The contact plate 11 is in contact with the side of the rail top 14, and the bottom of the rail top 14 is in contact with the tail plate 12. On the one hand, this facilitates the flipping of the upper hook 7 before tightening the top screw 1, improving the smoothness of the upper hook 7 disengaging from or engaging with the rail top 14, and enhancing the convenience of manual operation, saving time and effort. On the other hand, in the engaged state, as the top screw 1 is tightened, the concave structure will undergo a certain deformation (small deformation). Both the hinge 10 and the tail plate 12 of the upper hook 3 have or have reserved a certain amount of space. The hinge 10 provides the space by flipping, and the tail plate 12 of the upper hook 3 provides the space by elastic deformation. The two work together to provide displacement space for the deformation of the concave structure, achieving "flexible" engagement of the rail, and avoiding damage to the anti-slip device used for lifting rails due to excessive clamping force. To a certain extent, under the premise that the preload of the top screw 1 is the same, the heavier the rail, the greater the clamping force of the anti-slip device for lifting the rail, and the stronger the adaptability to clamping rails of different weights.

[0062] Optionally, a gasket is fitted on the abutting end of the set screw 1. The gasket presses against the rail web 15 of the rail to increase the abutting area of ​​the set screw 1, thereby preventing damage to the set screw 1 or the rail and improving the stability of the rail's positioning.

[0063] Secondly, the axial dimension of the rail along the set screw 1 is not greater than the dimension of the cavity, so that the rail can slide along the axial dimension of the set screw 1 inside the cavity. Specifically, the axial dimension of the inner cavity along the set screw 1 is greater than the width of the rail. On the one hand, this facilitates the engagement or disengagement of the upper clamping plate 7 when it flips on the rail top 14, providing more operating space and improving operational convenience. On the other hand, it can adapt to the clamping requirements of rails of different widths. When the concave structure is engaged on the rail, as the set screw 1 is tightened, the abutting end of the set screw 1 can push the rail to slide along the axial dimension of the set screw 1 until the fitting plate 11, the upper clamping plate 7, the lower clamping plate 9, the set screw 1, and the tail plate 12 of the lower hook 4 all abut against the surface of the rail, thus completing the stable clamping of rails of different widths.

[0064] Optionally, a self-locking nut 13 (not shown) is screwed onto the set screw 1; the self-locking nut 13 abuts against the side of the concave clamping plate 2 facing away from the cavity. By abutting the self-locking nut 13 against the outer surface of the side plate 8, the stability of the set screw 1 screwed onto the side plate 8 is improved, thereby improving the stability of the anti-slip device for hoisting rails in clamping the rails.

[0065] Optionally, the concave clamping plate 2 has multiple threaded holes 5; multiple set screws 1 are screwed into the multiple threaded holes 5 in a one-to-one correspondence. By increasing the number of set screws 1 pressing against the rail, the clamping strength and stability are further improved. Moreover, compared with the clamping method of a single set screw 1, multiple set screws 1 share the force, effectively avoiding the situation where the set screw 1 is damaged due to excessive shear force, and improving the reliability of using the set screw 1.

[0066] Optionally, the rail top 14, rail web 15, and rail bottom 16 of the rail are respectively abutted against the three set screws 1. By precisely arranging the three set screws 1, it is ensured that the three set screws 1 press against the rail top 14, rail web 15, and rail bottom 16 in sequence, which improves the accessibility of pushing the rail top 14, rail web 15, and rail bottom 16 to move along the axial direction of the set screws 1, ensuring that the rail is pushed into place, so that the upper hook 3 and the lower hook 4 are in full contact with the rail, and improving the reliability of the anti-slip device for hoisting the rail on the rail.

[0067] Furthermore, the present invention also provides a lifting device, which includes the anti-slip device for lifting rails as described above, and also includes rail clamps; in the lifting state, the clamp's locking mechanism engages with the locking mechanism slot 6 along the length of the rail. In this embodiment, a method is adopted... Figure 1 The rail clamp shown cooperates with the anti-slip device for lifting rails to clamp the rails. The upper clamping plate 7 has a locking slot 6, exposing the rail top 14 within the locking slot 6. Therefore, after the anti-slip device for lifting rails is installed on the rail, a pair of locking devices of the rail clamp extend from both sides of the exposed rail top 14, until the rail clamp fully clamps the rail top 14. Because the locking devices of the rail clamp engage with the locking slot 6 along the length of the rail, after the rail clamp has clamped the rail top 14, the locking slot 6 can limit the pair of locking devices along the length of the rail. That is, the locking devices engage between the two side walls of the locking slot 6, allowing the anti-slip device for lifting rails to limit the rail clamp, effectively preventing the rail clamp from slipping along the length of the rail during lifting and eliminating this safety hazard.

[0068] Of course, in addition to using rail clamps, other lifting devices that can be used in conjunction with anti-slip devices for lifting rails can also be used to clamp the rails. The present invention aims to emphasize that the clamping slot 6 can cooperate with the lifting device to limit the position, thereby improving the stability of the lifting, eliminating the phenomenon of vibration and slippage, and improving the safety of the operation.

[0069] Furthermore, the present invention also provides a hoisting method, which is implemented based on the hoisting device described above, and the hoisting method includes:

[0070] S1. Flip open the upper clamping plate 7; insert the concave clamping plate 2 from one side of the rail, so that the concave clamping plate 2 is fitted onto the lifting point on the rail. The lifting point is based on the end face of the rail. Measure the preset distance along the length of the rail and install the concave clamping plate 2; flip the upper clamping plate 7 in the opposite direction and fasten it onto the rail top 14; install the set screw 1 onto the threaded hole 5 and tighten the set screw 1 so that the set screw 1 abuts against the rail web 15.

[0071] S2. Continue to turn the top screw 1 so that the top screw 1 pushes the concave plate 2 to move along the axial direction of the top screw 1 until the rail top 14 of the rail is engaged with the upper hook 3 and the rail bottom 16 of the rail is engaged with the lower hook 4.

[0072] S3. Based on S1 and S2, install another anti-slip device on the lifting point of the other end of the rail.

[0073] S4. The clamping devices of a pair of rail clamps clamp the top 14 of the rail at the corresponding clamping device slots 6; lift the rail and move it to the preset position.

[0074] S5. Remove the rail clamp; loosen the top screw 1, and remove the anti-slip device from the end of the rail to prepare for the next lifting operation.

[0075] This invention utilizes the "I"-shaped characteristic of steel rails to create a clamp that is installed on the rail, namely a rail lifting anti-slip device. The inner cavity of the rail lifting anti-slip device is adapted to the shape of the I-shaped steel rail, increasing the contact area between the two and thus improving the stability after clamping. By reserving a certain amount of space through the hinge and the tail plate 12 of the upper hook 3, flexible adjustment can be made for different clamping strength requirements, and the rail can be pre-tightened. In the axial direction of the set screw 1, the rail can slide inside the cavity, so that the rail lifting anti-slip device can adapt to the clamping and lifting needs of rails with different widths.

[0076] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. An anti-slip device for hoisting steel rails, characterized in that, The anti-slip device for hoisting rails includes a top screw (1) and a concave clamping plate (2); The concave clamp (2) is provided with an upper hook (3) and a lower hook (4) facing its inner cavity at its two free ends, so as to construct the inner cavity of the concave clamp (2) into a cavity that can accommodate the I-shaped steel rail; The concave plate (2) has a threaded hole (5) on the side away from the upper hook (3) and the lower hook (4); the set screw (1) is screwed into the threaded hole (5), and one end of it extends into the cavity; The top of the concave plate (2) is provided with a fastener slot (6); the size of the fastener slot (6) in the axial direction of the top screw (1) is larger than the size of the rail.

2. The anti-slip device for hoisting steel rails according to claim 1, characterized in that, The concave plate (2) includes an upper plate (7), a side plate (8) and a lower plate (9) connected in a concave manner in sequence. The side plate (8) is hinged to the upper clamping plate (7) so that the upper clamping plate (7) can rotate about its hinge axis; The axis of the set screw (1) is perpendicular to the hinge axis.

3. The anti-slip device for hoisting steel rails according to claim 2, characterized in that, The side plate (8) and the upper plate (7) are hinged together by a hinge (10); The hinge axis of the hinge (10) is located on the top surface of the side plate (8).

4. The anti-slip device for hoisting steel rails according to claim 2, characterized in that, Both the upper hook (3) and the lower hook (4) include a bonding plate (11) and a tail plate (12). One end of the bonding plate (11) is connected to the free end of the upper clamping plate (7) or the free end of the lower clamping plate (9), and the other end is connected to the tail plate (12). In the clamping state, the fitting plate (11), the upper clamping plate (7), the lower clamping plate (9), the top screw (1), the tail plate (12) of the lower hook (4) are all in contact with the rail surface; the tail plate (12) of the upper hook (3) is in contact with the rail line surface.

5. The anti-slip device for hoisting steel rails according to any one of claims 1-4, characterized in that, The dimension of the rail along the axial direction of the set screw (1) is not greater than the dimension of the cavity, so that the rail can slide along the axial direction of the set screw (1) inside the cavity.

6. The anti-slip device for hoisting steel rails according to any one of claims 1-4, characterized in that, A self-locking nut (13) is screwed onto the set screw (1); The self-locking nut (13) abuts against the side of the concave plate (2) away from the cavity.

7. The anti-slip device for hoisting steel rails according to any one of claims 1-4, characterized in that, The concave plate (2) has multiple threaded holes (5); The multiple set screws (1) are screwed into the multiple threaded holes (5) in a one-to-one correspondence.

8. The anti-slip device for hoisting steel rails according to claim 7, characterized in that, The top (14), web (15), and bottom (16) of the rail are in contact with the three top screws (1) respectively.

9. A hoisting device, characterized in that, The hoisting device includes the anti-slip device for hoisting rails as described in any one of claims 1-8, and the hoisting device further includes rail clamps; In the hoisting state, the clamp of the rail clamp engages with the clamp slot (6) along the length of the rail.

10. A hoisting method, characterized in that, The hoisting method is implemented based on the hoisting device of claim 9, and the hoisting method includes: S1. Insert the concave clamp (2) from one side of the rail so that the concave clamp (2) is fitted onto the lifting point on the rail; install the set screw (1) onto the threaded hole (5) and tighten the set screw (1) so that the set screw (1) abuts against the rail web (15) of the rail. S2. Continue to turn the top screw (1) so that the top screw (1) pushes the concave plate (2) to move along the axial direction of the top screw (1) until the top of the rail (14) engages with the upper hook (3) and the bottom of the rail (16) engages with the lower hook (4). S3. Based on S1 and S2, install another anti-slip device for the hoisting rail at the hoisting point on the other side of the rail. S4. The clamps of a pair of rail clamps clamp the top (14) of the rail at the corresponding clamp slots (6); lift the rail and move it to the preset position.

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