A steel strand pay-off device with high safety performance for construction

Abstract

The present invention provides a steel strand pay-out device with high safety performance for construction, the steel strand pay-out device comprises: a hollow shell with an opening at one end, a pay-out hole being provided at the closed end thereof; a cover plate being detachably connected to the open end of the hollow shell so that a hollow cavity is formed between the two; a rotating cylinder being arranged in the hollow cavity so that the steel strand is wound around the outer wall of the rotating cylinder; the two ends of the rotating cylinder are rotatably connected to the hollow shell and the cover plate respectively; an arc-shaped tube penetrating the rotating cylinder is provided on the rotating cylinder, which is connected to the pay-out hole. The present invention realizes the support of the steel strand by the rotating cylinder, so that the steel strand is wound around the rotating cylinder, and the restraining force of the steel strand can be released in advance on the rotating cylinder to ensure the safety of the steel strand when paying out and prevent the steel strand from catapulting and injuring people, and also ensure that the steel strand is not entangled and knotted when paying out, which is convenient for paying out, can ensure the smooth paying out of the steel strand, and can prevent the steel strand from being rusted by rain.

Description

Technical Field

[0001] The invention relates to the technical field of prestressed engineering in construction engineering, and in particular to a steel strand pay-out device with high safety performance for construction. Background Art

[0002] With the continuous improvement of people's living standards, the construction industry is required to provide comfortable and bright spaces, flexible and changeable plane combinations, and bridges with larger spans to meet the various needs of life and work. Prestressed concrete is catering to the development trend of modern building structures with its outstanding advantages such as large span, light weight, saving building materials, saving building height, and improving building and structural functions. However, the steel strands used in prestressed engineering may be ejected during laying out due to the binding force. At present, the steel strand laying tools used in most construction projects are simple and dangerous, and cannot prevent the steel strands from rusting due to rain, and there are many defects. Summary of the invention

[0003] In view of this, the present invention proposes a steel strand pay-out device with high safety performance for construction, aiming to solve the problem of the danger of ejection in existing steel strand pay-out tools.

[0004] The present invention proposes a steel strand pay-out device with high safety performance for construction, the steel strand pay-out device comprising: a hollow shell with an opening at one end, a pay-out hole being provided at a closed end thereof; a cover plate, which is detachably connected to the open end of the hollow shell so as to form a hollow cavity between the two; a rotating cylinder, which is arranged in the hollow cavity, a gap being provided between the side plates of the rotating cylinder and the side plates of the hollow shell so as to allow the steel strand to be wound around the outer wall of the rotating cylinder; the two ends of the rotating cylinder are rotatably connected to the hollow shell and the cover plate respectively, so as to realize the pay-out of the steel strand; the rotating cylinder is provided with an arc tube which passes through the rotating cylinder and is connected to the pay-out hole, and the head of the steel strand passes through the arc tube and the pay-out hole in turn to the outside of the hollow shell.

[0005] Furthermore, in the above-mentioned steel strand pay-out device with high safety performance for construction, the rotating cylinder is a hollow cylinder structure with an open end, and its open end is arranged toward the closed end of the hollow shell; the open end of the rotating cylinder is provided with a plurality of dovetail blocks, which can be slidably clamped in an annular dovetail groove opened on the bottom plate of the hollow shell.

[0006] Furthermore, in the above-mentioned steel strand pay-out device with high safety performance for construction, a support shaft is provided on the cover plate, and the closed bottom plate of the rotating cylinder is rotatably connected to the support shaft; and balls are provided on the closed bottom plate for pressing against the cover plate and rolling along the cover plate.

[0007] Furthermore, in the above-mentioned steel strand pay-out device with high safety performance for construction, the closed end of the hollow shell is provided with at least three legs for supporting the hollow shell when it is laid flat, and also for serving as a counterweight when in use; each of the legs is adjustably connected to the hollow shell along the axial position of the hollow shell, so as to adjust the height of the support for the hollow shell, and also for adjusting the position of the counterweight.

[0008] Furthermore, in the above-mentioned steel strand pay-out device with high safety performance for construction, the side panels of the hollow shell are provided with mounting grooves which are arranged one-to-one with the legs, the legs are partially arranged in the mounting grooves, and the ends of the legs located in the mounting grooves are slidably connected to the mounting grooves; a locking piece is also provided between the legs and the side panels of the hollow shell for locking the legs to the hollow shell.

[0009] Furthermore, in the above-mentioned steel strand pay-out device with high safety performance for construction, a second elastic member is provided between the end of the support leg located in the installation groove and the bottom wall of the installation groove to limit the length of the support leg located in the installation groove.

[0010] Furthermore, in the above-mentioned steel strand pay-out device with high safety performance for construction, a limiting ring is provided between the rotating cylinder and the hollow shell to limit the position of the steel strand; a first elastic member is provided between the limiting ring and the cover plate to apply an elastic force to the limiting ring, and as the steel strand is paid out, the limiting ring gradually moves toward the direction approaching the closed end of the hollow shell to centrally limit the steel strand between the limiting ring and the closed end of the hollow shell.

[0011] Furthermore, in the above-mentioned steel strand pay-out device with high safety performance for construction, a plurality of rotating shafts distributed at intervals are provided on the outer wall of the rotating cylinder along its circumference, which are rotatably connected to the outer wall of the rotating cylinder, and the rotating shafts are at least partially protruded from the outer circumference of the rotating cylinder to rotate with the pay-out of the steel strands.

[0012] Furthermore, in the above-mentioned steel strand pay-out device with high safety performance for construction, the closed end of the hollow shell is provided with a conical cylinder outside the hollow cavity, which is connected with the pay-out hole, so that the steel strand passes through the pay-out hole and then passes through the conical cylinder to the outside.

[0013] Furthermore, in the above-mentioned steel strand pay-out device with high safety performance for construction, a lifting ring is provided on the side wall of the hollow shell; a support plate is provided on the side wall of the hollow shell on the side opposite to the lifting ring, and a roller is provided on the end of the support plate away from the hollow shell.

[0014] The steel strand pay-out device with high safety performance for construction provided by the present invention realizes the support of the steel strand by a rotating cylinder, so that the steel strand is wound on the rotating cylinder, and the restraining force of the steel strand can be released in advance on the rotating cylinder to ensure the safety of the steel strand when paying out and prevent the steel strand from catapulting and injuring people, and also ensure that the steel strand is not entangled and knotted when paying out, so it is convenient to pay out; the rotating cylinder can be rotatably connected in a hollow cavity enclosed between the hollow shell and the cover plate, which can ensure the smooth paying out of the steel strand and prevent the steel strand from rusting due to rain. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0016] Figure 1 A front view of a use state of a steel strand pay-off device with high safety performance for construction provided by an embodiment of the present invention;

[0017] Figure 2 A side cross-sectional view of a use state of a steel strand pay-off device with high safety performance for construction provided by an embodiment of the present invention;

[0018] Figure 3 A cross-sectional view of a flat-lying state of a steel strand pay-off device with high safety performance for construction provided by an embodiment of the present invention;

[0019] Figure 4 A front view of a rotating cylinder provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] See also Figures 1 to 4 , which shows the preferred structure of the steel strand pay-off device with high safety performance for construction provided by the embodiment of the present invention. As shown in the figure, the steel strand pay-off device comprises: a hollow shell 1, a cover plate 2, a rotating cylinder 3 and a limit ring 4; wherein,

[0022] One end of the hollow shell 1 (such as Figure 2 The right end shown) is open, and the other end (as shown Figure 2 The left end of the hollow shell 1 is closed, and a wire-releasing hole 11 is provided at the closed end of the hollow shell 1. Specifically, one end of the hollow shell 1 is an open end, and the other end is a closed end, so that the steel strand can be placed into the hollow shell 1 through the open end, thereby preventing the steel strand from being exposed to rain and rusting. The wire-releasing hole 11 can be set in the middle position of the closed end of the hollow shell 1, that is, the wire-releasing hole 11 can be coaxially arranged with the hollow shell 1, so that the head of the steel strand can extend from the wire-releasing hole 11 to the outside of the hollow shell 1.

[0023] The cover plate 2 is detachably connected to the open end of the hollow shell 1 so that a hollow cavity is formed between the two. Specifically, the cover plate 2 can be detachably connected to the open end of the hollow shell 1 by bolts, so that the hollow shell 1 can be sealed through the cover plate 2 after the steel strand is placed from the open end of the hollow shell 1. The outer side of the cover plate 2 can be bent to be provided with a clamping ring 21 for clamping on the outer wall of the hollow shell 1 to achieve the limit of the cover plate 2.

[0024] The rotating cylinder 3 is arranged in the hollow cavity, and a gap is provided between the side wall of the rotating cylinder 3 and the side wall of the hollow shell 1, so that the steel strand is wound on the outer wall of the rotating cylinder 3; both ends of the rotating cylinder 3 (such as Figure 2 The left and right ends shown in the figure are rotatably connected to the hollow shell 1 and the cover plate 2 respectively, so as to pay out the steel strand; the rotating cylinder 3 is provided with an arc tube 31 penetrating the rotating cylinder 3, which is connected with the pay-out hole 11, and the head of the steel strand passes through the arc tube 31 and the pay-out hole 11 to the outside of the hollow shell 1 in turn. Specifically, the rotating cylinder 3 can be a hollow cylinder structure with one end open, and its open end is arranged toward the closed end of the hollow shell 1. The rotating cylinder 3 can also be coaxially arranged with the hollow shell 1, and its left and right ends are rotatably connected to the bottom wall of the hollow shell 1 and the cover plate 2 respectively, so that the rotating cylinder 3 rotates when the steel strand is paid out to pay out the steel strand. There can be multiple arc tubes 31, which can be evenly arranged along the circumference of the rotating cylinder 3, so that the head of the steel strand can select one of them nearby to pass through the wire-laying hole 11; each arc tube 31 extends from the side wall of the rotating cylinder 3 to the axial position of the opening end of the rotating cylinder 3, so as to extend to the wire-laying hole 11.

[0025] The limiting ring 4 is sleeved between the rotating cylinder 3 and the hollow shell 1 to limit the position of the steel strand. Specifically, the limiting ring 4 is an annular plate structure, which is sleeved between the rotating cylinder 3 and the hollow shell 1, and a gap is provided between the inner wall of the limiting ring 4 and the outer wall of the rotating cylinder 3 to reduce the friction between the two when the rotating cylinder 3 rotates, and at the same time, the position of the steel strand is limited by the limiting ring 4.

[0026] A first elastic member 5 is provided between the limiting ring 4 and the cover plate 2 to apply an elastic force to the limiting ring 4. As the steel strands are released, the limiting ring 4 gradually moves toward the closed end of the hollow shell 1, so that the steel strands are concentrated and limited between the limiting ring 4 and the closed end of the hollow shell 1. Specifically, one end of the first elastic member 5 (such as Figure 2 The right end as shown) is connected to the cover plate 2, and the other end (as shown Figure 2 The left end of the rotating cylinder 3 is connected to the limit plate ring 4, and an elastic thrust is applied to the limit ring 4 through the first elastic member 5, so that the limit ring 4 pushes the steel strands arranged between the limit ring 4 and the closed end of the hollow shell 1, so that during the wire laying process, the steel strands wound on the outer wall of the rotating cylinder 3 are gradually reduced, so that the limit ring 4 can move toward the direction close to the closed end of the hollow shell 1, so that the steel strands are concentrated and limited between the limit ring 4 and the closed end of the hollow shell 1 to avoid the movement of the steel strands. Preferably, there can be a plurality of first elastic members 5, which can be evenly arranged along the circumference of the limit ring 4. Among them, the first elastic member 5 can be a spring or other structures, which are not limited in any way in this embodiment.

[0027] In this embodiment, in order to facilitate the laying out of the steel strand, preferably, the closed end of the hollow shell 1 is provided with a conical cylinder 6 outside the hollow cavity 11, which is connected with the laying hole 11, so that the steel strand passes through the laying hole 11 and then passes through the conical cylinder 6 to the outside. Specifically, the conical cylinder 6 is provided from the end close to the hollow shell 1 (such as Figure 2 The left end shown in FIG. 1 is to the end away from the hollow shell 1 (as shown in FIG. Figure 2 The diameter of the steel strand is reduced so as to guide the steel strand so that the steel strand can be guided from the closing end of the conical cylinder 6 (such as Figure 2 the right end of the conical cylinder 6 can be directly connected and fixed to the disk 13 of the hollow shell 1, or it can be connected and fixed to the disk 13 through a support rod 61.

[0028] In this embodiment, in order to facilitate the lifting of the steel strand pay-off device, preferably, a lifting ring 7 is provided on the side wall of the hollow shell 1 to realize the lifting of the entire steel strand pay-off device; a support plate 8 is provided on the side wall of the hollow shell 1 on the side opposite to the lifting ring 7, and a roller 81 is provided at the end of the support plate 8 away from the hollow shell 1. Specifically, when the steel strand pay-off device is in use, that is, when the pay-off is being performed, the hollow shell 1 is placed horizontally, and the lifting ring 7 can be set above the side wall of the hollow shell 1 (relative to the Figure 2 The support plate 8 can be arranged below the side wall of the hollow shell 1 to support the steel strand pay-off device. There can be multiple support plates 8 to ensure the stability of the steel strand pay-off device. To facilitate the movement of the steel strand pay-off device, preferably, a roller 81 is provided at the bottom end of the support plate 8 to enable the steel strand pay-off device to move.

[0029] In this embodiment, in order to facilitate the placement of the steel strands on the rotating cylinder 3, preferably, the closed end of the hollow shell 1 is provided with at least three legs 9 to support the hollow shell 1 when it is laid flat, so as to facilitate the steel strands to be sleeved from the open end of the hollow shell 1 onto the rotating cylinder 3, and also to serve as a counterweight when in use to avoid tilting of the steel strand pay-out device. Specifically, the legs 9 can be connected to the fixed cylinder 12 to avoid interference between the legs 9 and the rotating cylinder 3 and other parts; and the legs 9 can be evenly spaced along the circumference of the fixed cylinder 12 to improve the stability of the steel strand pay-out device when laid flat. In order to facilitate the adjustment of the legs 9 away from the end of the hollow shell 1 (such as Figure 3 Preferably, each leg 9 and the hollow shell 1 are aligned along the axial direction of the hollow shell 1 (as shown in the figure). Figure 3 The vertical direction shown in the figure is adjustably connected to adjust the height of the hollow shell 1 and the position of the counterweight; further preferably, the side plate of the hollow shell 1, that is, the fixed cylinder 12 of the hollow shell 1, is provided with a mounting groove 121 corresponding to the support leg 9, and the support leg 9 is partially arranged in the mounting groove 121, and the end of the support leg 9 in the mounting groove 121 (such as Figure 3 The upper end of the leg 9 shown in the figure is slidably connected to the mounting groove 121; a locking piece 91 is also provided between the leg 9 and the side plate of the hollow shell 1, for locking the leg 9 to the hollow shell 1. The end of the leg 9 located in the mounting groove 121 may be provided with a limit plate 92, for preventing the leg 9 from escaping from the mounting groove 121; the end 93 of the leg 9 located outside the mounting groove 121 may be provided with a support plate 93, for increasing the contact area between the steel strand pay-off device and the ground when it is laid flat, so as to improve the stability of the steel strand pay-off device. The locking piece 91 may be a bolt, which can press the leg 9 at the end to achieve the locking of the leg 9. Of course, the leg 9 may be provided with a plurality of bolts along its length direction (such as Figure 3 A plurality of insertion holes are provided in the mounting groove 121 (in the vertical direction shown in the figure), so that the locking member 91 can pass through or be inserted in the insertion hole to lock the leg 9. A second elastic member 10 can also be provided between the end of the leg 9 located in the mounting groove 121 and the bottom wall of the mounting groove 121 to limit the length of the leg 9 located in the mounting groove 121 and to apply a restoring force to the leg 9 so that the leg 9 slides downward to the initial position. The second elastic member 10 can be a spring.

[0030] Continue to see Figures 1 to 3The hollow shell 1 includes: a fixed cylinder 12 and a disc 13; wherein both ends of the fixed cylinder 12 are opened, and the disc 13 is arranged and connected to the end of the fixed cylinder 12. Specifically, the disc 13 can be arranged in communication with the fixed cylinder 12 to achieve blocking of one end of the fixed cylinder 12; the outer periphery of the disc 13 can be connected to the fixed cylinder 12 through a plurality of connecting rods 14, each connecting rod 14 is arranged along the radial direction of the disc 13, and the connecting rods 14 are evenly arranged along the circumference of the disc 13. wherein the wire release hole 11 can be opened at the axial position of the disc 13.

[0031] Continue to see Figures 2 to 3 , the open end of the rotating cylinder 3 may be provided with a plurality of dovetail blocks 32, which can be slidably clamped in the annular dovetail groove opened on the bottom plate of the disk 13, that is, the hollow shell 1; the cover plate 2 is provided with a support shaft 22, and the closed bottom plate 33 of the rotating cylinder 3 is rotatably connected to the support shaft 22, and the support shaft 22 can be used as a supporting bearing member of the rotating cylinder 3 to support the steel strand; and a bearing 23 may be provided between the support shaft 22 and the closed floor 31; in order to reduce the friction between the closed bottom plate 33 and the cover plate 2, preferably, A ball 34 is provided on the closed bottom plate 33 for pressing against the cover plate 2 and rolling along the cover plate 2, so that a gap is provided between the closed bottom plate 33 and the cover plate 2, reducing the contact area between the two, and further reducing the friction between the two; wherein a baffle 35 is provided on the closed bottom plate 33, and a rolling cavity is provided between the two, and the ball 34 is partially rotatably clamped in the rolling cavity, and a part of the ball 34 passes through the baffle 35 and is exposed between the baffle 35 and the cover plate 2; there can be multiple balls 34 and they are arranged along the circumference of the rotating cylinder 3.

[0032] Continue to see Figure 4 In order to reduce the friction between the steel strand and the rotating cylinder 3, preferably, a plurality of rotating shafts 36 are arranged at intervals along the circumference of the outer wall of the rotating cylinder 3, which are rotatably connected to the rotating cylinder 3, and at least part of the rotating shaft 36 is convexly arranged on the outer circumference of the rotating cylinder 3, so as to rotate with the unwinding of the steel strand, so as to reduce the friction between the steel strand and the rotating cylinder 3. Specifically, a plurality of evenly arranged rotating grooves (not shown in the figure) can be arranged on the outer circumference of the rotating cylinder 3 along the circumference, and the rotating shaft 36 can be rotatably clamped in the rotating grooves, and part of the rotating shaft 36 is convexly arranged outside the rotating grooves to support the steel strand, reduce the contact area between the steel strand and the outer wall of the rotating cylinder 3, and the rotating shaft 36 can rotate with the unwinding of the steel strand, so as to reduce the friction on the steel strand.

[0033] The usage method and working process of the steel strand pay-off device:

[0034] First, place the device flat on the ground and lock the legs 9 to the hollow housing 1 through the locking members 91. Figure 3In the state shown, the cover plate 2 is removed; then, the complete steel strand, i.e., the steel strand that has been tied but not released from stress, is sleeved on the outer wall of the rotating cylinder 3, and the steel strand packaging and the binding tape are cut open using a tool so that the restraining force of the steel strand is completely released. The arrangement of the rotating cylinder 3 and the hollow shell 1 can avoid the danger of ejection when the restraining force of the steel strand is released; and the head of the steel strand is extended to the wire-releasing hole 11 through the arc tube 31 and finally extended through the conical cylinder 6;

[0035] Finally, the cover plate 2 is fixed to the hollow shell 1. After the installation is completed, the device can be erected by hoisting the hoisting ring 7 with a crane to safely lay out the steel strands.

[0036] In summary, the steel strand pay-out device provided in the present embodiment supports the steel strand through the rotating cylinder 3, so that the steel strand is wound on the rotating cylinder 3, and the restraining force of the steel strand can be released in advance on the rotating cylinder 3 to ensure the safety of the steel strand during pay-out and prevent the steel strand from catapulting and injuring people, and also ensure that the steel strand is not entangled or knotted during pay-out, thereby facilitating pay-out; the rotating cylinder 3 can be rotatably connected in the hollow cavity enclosed between the hollow shell 1 and the cover plate 2, which can ensure the smooth pay-out of the steel strand and prevent the steel strand from rusting due to rain.

[0037] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A steel strand pay-off device with high safety performance for construction, characterized in that: include: A hollow shell with an open end and a wire-releasing hole at its closed end; A cover plate is detachably connected to the open end of the hollow shell body so as to form a hollow cavity between the two; The rotating cylinder is arranged in the hollow cavity so that the steel strand is wound on the outer wall of the rotating cylinder; the two ends of the rotating cylinder are rotatably connected to the hollow shell and the cover plate respectively, so as to realize the wire release of the steel strand; the rotating cylinder is provided with an arc tube penetrating the rotating cylinder, which is connected with the wire release hole, and the head of the steel strand passes through the arc tube and the wire release hole to the outside of the hollow shell in turn; The rotating cylinder is a hollow cylinder structure with one end open, and the open end is arranged toward the closed end of the hollow shell; The open end of the rotating cylinder is provided with a plurality of dovetail blocks, which can be slidably clamped in the annular dovetail grooves provided on the bottom plate of the hollow shell; The cover plate is provided with a support shaft, and the closed bottom plate of the rotating cylinder is rotatably connected to the support shaft; The closed bottom plate is provided with a ball bearing for pressing against the cover plate and rolling along the cover plate; A limiting ring is provided between the rotating cylinder and the hollow shell to limit the position of the steel strand; A first elastic member is provided between the limiting ring and the cover plate, for applying an elastic force to the limiting ring. As the steel strands are released, the limiting ring gradually moves toward the closed end of the hollow shell, so that the steel strands are centrally limited between the limiting ring and the closed end of the hollow shell. The outer wall of the rotating cylinder is provided with a plurality of rotating shafts distributed at intervals along its circumference, which are rotatably connected to the outer wall of the rotating cylinder, and at least part of the rotating shafts are protruded from the outer circumference of the rotating cylinder to rotate with the unwinding of the steel strands.

2. The steel strand pay-off device with high safety performance for construction according to claim 1, characterized in that: The closed end of the hollow shell is provided with at least three legs for supporting the hollow shell when it is in a flat state and also for serving as a counterweight when in use; Each support leg is adjustably connected to the hollow shell along the axial position of the hollow shell, so as to adjust the height of the support for the hollow shell and the position of the counterweight.

3. The steel strand pay-off device with high safety performance for construction according to claim 2, characterized in that: The side plate of the hollow shell is provided with mounting grooves corresponding to the legs, the legs are partially arranged in the mounting grooves, and the ends of the legs located in the mounting grooves are slidably connected to the mounting grooves; A locking piece is also provided between the supporting leg and the side plate of the hollow shell body, so as to lock the supporting leg to the hollow shell body.

4. The steel strand pay-off device with high safety performance for construction according to claim 1, characterized in that: A second elastic member is provided between the end of the support leg located in the installation slot and the bottom wall of the installation slot, so as to limit the length of the support leg located in the installation slot.

5. The steel strand pay-off device with high safety performance for construction according to claim 1, characterized in that: The closed end of the hollow shell is provided with a conical cylinder outside the hollow cavity, which is connected with the wire-laying hole, so that the steel strand passes through the wire-laying hole and then passes through the conical cylinder to the outside.

6. The steel strand pay-off device with high safety performance for construction according to claim 1, characterized in that: A lifting ring is provided on the side wall of the hollow shell; A support plate is provided on the side wall of the hollow shell at a side opposite to the lifting ring, and a roller is provided at the end of the support plate away from the hollow shell.

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