Center pillar steel strand fixing device

Abstract

The utility model provides a center pillar steel strand fixing device which can stably fix a steel strand on a center pillar. A first surface and a second surface, opposite to each other, in a first fastening plate of a first pressing plate of the device are arc surfaces, a groove is formed in the second surface, and a first side wall and a second side wall, opposite to each other, in the first fastening plate are fixedly connected with a first number of first fixing columns respectively; a protruding supporting piece is arranged in the middle of a bottom plate of a supporting seat of a second pressing plate of the device, a second fastening plate is arranged on the supporting piece, the third surface of the second fastening plate of the second pressing plate is arranged to be an arc surface, a groove is formed in the third surface, and the second fastening plate is fixedly connected with the supporting piece through a fourth surface. Second fixing columns with the first number are arranged on the portions, located on the two sides of the supporting piece, of the bottom plate correspondingly, and the first pressing plate is in bolted connection with at least two second fixing columns of the second pressing plate through at least two first fixing columns so that the steel strand located between the groove of the first fastening plate and the groove of the second fastening plate can be fastened.

Description

Technical Field

[0001] This application relates to the technical field of strand fixing, and particularly to a fixing device for middle column strands. Background Art

[0002] Solar photovoltaic power generation utilizes the photovoltaic effect principle to directly convert solar energy into electrical energy through photovoltaic panels. Currently, the installation methods of photovoltaic panels are as follows: by pulling two strands between two middle columns and then installing the photovoltaic panels on the two strands. This installation structure is a flexible installation structure.

[0003] Currently, in the flexible installation structure, U-bolts are used to fix the strands on the middle column. After the strands pass through the through holes of the U-bolts, the screw rods at both ends of the U-bolts pass through the buffer plate and the middle column, and then bolts are used to fix the U-bolts with the strands on the middle column. The contact between the strands installed by the above flexible installation structure and the U-bolts is point contact. When the span between the two middle columns is large and the weight of the photovoltaic panels on one side is large, the forces on the two strands are uneven and they are prone to sliding. And in an environment with strong wind, if the photovoltaic panels shake, friction occurs between the steel ropes and the U-bolts, which will cause structural damage and thus affect the service life.

[0004] Therefore, there is an urgent need for a device that can stably fix the strands on the middle column. Summary of the Utility Model

[0005] This application provides a fixing device for middle column strands, which can stably fix the strands on the middle column.

[0006] In the first aspect, a fixing device for middle column strands is provided, including a first pressing plate and a second pressing plate;

[0007] The first pressing plate includes a first fastening plate and at least two first fixing columns. The opposite first surface and second surface of the first fastening plate are set as arc surfaces. A groove is provided on the second surface. The opposite first side wall and second side wall of the first fastening plate are respectively fixedly connected with a first number of first fixing columns, and each first fixing column is provided with a threaded through hole;

[0008] The second pressing plate includes a support base, a second fastening plate, and at least two second fixing columns. A raised support member is provided in the middle of the bottom plate of the support base. Through holes are provided on both sides of the support member on the bottom plate. The second fastening plate is provided on the support member. The third surface of the second fastening plate is set as an arc surface, and a groove is provided on the third surface. The second fastening plate is fixedly connected to the support member through the fourth surface opposite to the third surface. On both sides of the support member on the bottom plate, a first number of second fixing columns are respectively provided. Each second fixing column is provided with a threaded through hole. The first pressing plate is bolted to at least two second fixing columns of the second pressing plate through at least two first fixing columns to clamp the steel strand located between the groove of the first fastening plate and the groove of the second fastening plate.

[0009] In a feasible design, a second number of protrusions are provided in the groove of the first fastening plate.

[0010] In a feasible design, a second number of protrusions are provided in the groove of the second fastening plate.

[0011] In a feasible design, the end of the first fixing column facing the second pressing plate extends out of the second surface.

[0012] In a feasible design, concave notches are respectively provided at both ends of the groove of the first fastening plate.

[0013] In a feasible design, concave notches are respectively provided at both ends of the groove of the second fastening plate.

[0014] In a feasible design, the outer diameter of the part of the first fixing column extending out of the second surface is smaller than the outer diameter of the part of the first fixing column not extending out of the second surface.

[0015] In a feasible design, a groove is provided in the direction of the support member of the support base facing the bottom plate.

[0016] In the above embodiments of the present application, after fixing the bottom plate of the second pressing plate to the cross beam of the middle column through the through hole, the steel strand is placed into the groove of the second pressing plate. Then, bolts are used to pass through the first fixing column and the second fixing column to connect the first pressing plate and the second pressing plate, and the first pressing plate is placed with its groove facing the direction of the steel strand. Since the opposite first surface and second surface in the first fastening plate are arranged as arc surfaces, the groove of the first pressing plate is arc-shaped. Similarly, the groove of the second pressing plate is also arc-shaped. Subsequently, an arc-shaped through hole can be formed between the groove of the first pressing plate and the groove of the second pressing plate, and the steel strand can pass through the arc-shaped through hole, so that the steel strand is fixed to the middle column. Since the steel strand is in surface contact with the arc-shaped through hole, compared with the current solution of fixing the steel strand with a U-shaped bolt where the steel strand is in point contact with the U-shaped bolt, resulting in unstable fixing effect of the steel strand, the contact area between the steel strand and the first fastening plate and the second fastening plate in the present application is greatly increased, thereby enhancing the effect of the first pressing plate and the second pressing plate on clamping the steel strand. Furthermore, the stability of the device for fixing the steel strand is improved, and the problem of damage to the device caused by the sliding of the steel strand between the arc-shaped through holes is avoided. Moreover, since the fixing effect of the device on the steel strand is improved, it can also be applied to the fixing of the steel strand between two middle columns with a large span. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0018] Figure 1 FIG. is a schematic structural diagram of a steel strand fixing device for a middle column provided by an exemplary embodiment of the present application;

[0019] Figure 2 FIG. is a schematic structural diagram of a first pressing plate provided by an exemplary embodiment of the present application;

[0020] Figure 3 FIG. is another schematic structural diagram of a first pressing plate provided by an exemplary embodiment of the present application;

[0021] Figure 4 FIG. is a schematic structural diagram of a second pressing plate provided by an exemplary embodiment of the present application;

[0022] Figure 5 FIG. is another schematic structural diagram of a second pressing plate provided by an exemplary embodiment of the present application;

[0023] Figure 6 FIG. is a schematic diagram of an application scenario of a steel strand fixing device for a middle column provided by an exemplary embodiment of the present application;

[0024] Figure 7 It is a schematic diagram of the application scenario of another middle column steel strand fixing device provided by an exemplary embodiment of the present application;

[0025] Figure 8 It is a schematic diagram of the structure of another middle column steel strand fixing device provided by an exemplary embodiment of the present application.

[0026] Label description:

[0027] 1 - First pressing plate, 2 - Second pressing plate, 3 - Steel strand, 4 - Middle column;

[0028] 11 - First fastening plate, 12 - First fixing column, 111 - First surface, 112 - Second surface, 113 - First side wall, 114 - Second side wall, 121 - First threaded through hole, 122 - Third side wall, 1121 - First groove, 1122 - First protrusion, 1123 - First concave notch;

[0029] 21 - Support base, 22 - Second fastening plate, 23 - Second fixing column, 211 - Bottom plate, 212 - Support member, 221 - Third surface, 231 - Second threaded through hole, 232 - Fourth side wall, 2111 - Through hole, 2211 - Second groove, 2212 - Second protrusion, 2213 - Second concave notch;

[0030] 41 - Cross beam. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "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 mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] As Figure 1 shown, the present application provides a center pillar steel strand fixing device, which includes a first pressing plate 1 and a second pressing plate 2.

[0034] The following combines Figure 2 and Figure 3 to introduce the first pressing plate 1:

[0035] The first pressing plate 1 includes a first fastening plate 11 and at least two first fixing columns 12. The opposite first surface 111 and second surface 112 of the first fastening plate 11 are set as arc surfaces. A groove 1121 (i.e., the first groove) is formed on the second surface 112. The opposite first side wall 113 and second side wall 114 of the first fastening plate 11 are respectively fixedly connected with a first number of first fixing columns 12, and each first fixing column 12 is provided with a threaded through hole 121 (i.e., the first threaded through hole).

[0036] The following combines Figure 4 and Figure 5 to introduce the second pressing plate 2:

[0037] The second pressing plate 2 includes a support base 21, a second fastening plate 22, and at least two second fixing columns 23. A raised support member 212 is provided in the middle of the bottom plate 211 of the support base 21. Through holes 2111 are provided on both sides of the support member 212 on the bottom plate 211. A second fastening plate 22 is provided on the support member 212. The third surface 221 of the second fastening plate 22 is set as an arc surface, and a groove 2211 (i.e., the second groove) is provided on the third surface 221. The second fastening plate 22 is fixedly connected to the support member 212 through a fourth surface opposite to the third surface 221. A first number of second fixing columns 23 are respectively provided on both sides of the support member 212 on the bottom plate 211. Each second fixing column 23 is provided with a threaded through hole 231 (i.e., the second threaded through hole). The first pressing plate 1 is bolted to at least two second fixing columns 23 of the second pressing plate 2 through at least two first fixing columns 12, so as to clamp the steel strand 3 located between the groove 1121 of the first fastening plate 11 and the groove 2211 of the second fastening plate 22.

[0038] Wherein, the value of the first number can be set according to actual needs. For example, the value of the first number is 1 or 2, that is, the total number of the first fixing columns 12 is 2 or 4. If the total number of the first fixing columns 12 is 4, the spacing of the first fixing columns 12 on the same side can be set according to actual needs, and the present application does not limit this.

[0039] It should be understood that through Figure 4 It can be seen that the fourth surface opposite to the third surface 221 is integrated with the support member 212. Therefore, the fourth surface is not shown in the drawings. It can also be understood that the shape of the fourth surface is not limited in the present application.

[0040] The number of the second fixing columns 23 is the same as the number of the first fixing columns 12, and the positions and sizes of the respective second fixing columns 23 correspond to the positions and sizes of the first fixing columns 12 that need to be bolted, so that the first pressing plate 1 is bolted to at least two second fixing columns 23 of the second pressing plate 2 through at least two first fixing columns 12.

[0041] The number of the through holes 2111 can be set according to actual needs. For example, the value of the number of the through holes 2111 is 2 or 4.

[0042] Exemplarily, the middle column steel strand fixing device provided by the present application is processed by casting.

[0043] Exemplarily, if the through holes 2111 of the second pressing plate 2 do not have threads, the bottom plate 211 can be fixed on the cross beam 41 of the middle column 4 by passing an iron nail or the like through the through holes 2111 and the cross beam of the middle column. If the through holes 2111 of the second pressing plate 2 are provided with threads, the bottom plate 211 can be fixed on the cross beam 41 of the middle column 4 by passing a bolt through the through holes 2111 and the cross beam 41 of the middle column 4.

[0044] Exemplarily, the curvature of the arc surface of the first fastening plate 11 is the same as that of the arc surface of the second fastening plate 22.

[0045] Exemplarily, the first fixing post 12 and the second fixing post 23 are cylindrical.

[0046] In the above embodiments of the present application, after the bottom plate 211 of the second pressing plate 2 is fixed to the cross beam 41 of the middle upright column 4 through the through hole 2111, the steel strand 3 is placed in the groove 2211 of the second pressing plate 2. Then, bolts are used to pass through the first fixing post 12 and the second fixing post 23 to connect the first pressing plate 1 and the second pressing plate 2, and the first pressing plate 1 is placed with the groove 1121 facing the steel strand 3. Since the opposite first surface 111 and second surface 112 in the first fastening plate 11 are arranged as arc surfaces, the groove 1121 of the first pressing plate 1 is arc-shaped. Similarly, the groove 2211 of the second pressing plate 2 is also arc-shaped. Subsequently, an arc-shaped through hole can be formed between the groove 1121 of the first pressing plate 1 and the groove 2211 of the second pressing plate 2, and the steel strand 3 can pass through the arc-shaped through hole, so that the steel strand 3 is fixed to the middle upright column 4. Since the steel strand 3 is in surface contact with the arc-shaped through hole, compared with the current solution of fixing the steel strand with a U-shaped bolt where the steel strand is in point contact with the U-shaped bolt, resulting in unstable fixing effect of the steel strand, the contact area between the steel strand 3 and the first fastening plate 11 and the second fastening plate 2 in the present application is greatly increased, thereby enhancing the effect of clamping the steel strand 3 by the first pressing plate 1 and the second pressing plate 2. Furthermore, the stability of the device for fixing the steel strand 3 is improved, and the problem of damage to the device caused by the sliding of the steel strand 3 between the arc-shaped through holes is avoided. Moreover, since the fixing effect of the device on the steel strand 3 is improved, it can also be applied to the fixing of the steel strand between two middle upright columns with a large span.

[0047] Further, as Figure 6As shown, when the bottom plate 211 of the second pressing plate 2 is fixed to the upper surface of the cross beam 41 of the middle column 4 (i.e., the first pressing plate 1 is located above the second pressing plate 2), the steel strand 3 will bend into a certain arc due to its own gravity and the weight of the load after being placed in the groove 2211 of the second pressing plate 2. In the current solution of fixing the steel strand with U-bolts, the contact between the steel strand and the U-bolt is a point contact. When the load on the steel strand is too heavy, the pressure per unit area of the steel strand on the U-bolt will be relatively large, and the compressive effect of the steel strand is poor, which easily accelerates the damage of the steel strand and reduces its service life. However, the first fastening plate 11 and the second fastening plate 22 provided in this application are both designed with arc surfaces and can closely fit the part of the steel strand 3 passing through the arc-shaped through hole. Since the contact area between the steel strand 3 and the first fastening plate 11 and the second fastening plate 22 is greatly increased, the pressure per unit area of the steel strand 3 on the second pressing plate 2 is reduced. While improving the compressive effect of the steel strand 3, it can further enhance the effect of clamping the steel strand 3 by the first pressing plate 1 and the second pressing plate 2.

[0048] In addition, as Figure 7 shown, when the terrain where the middle column 4 is located is relatively low and the terrains of the middle columns on both sides are higher than that of this middle column 4, it is necessary to fix the bottom plate 211 of the second pressing plate 2 to the lower surface of the cross beam 41 of the middle column 4 (i.e., the first pressing plate 1 is located below the second pressing plate 2). After the steel strand 3 is placed in the groove 1121 of the first pressing plate 1, due to the high position of the steel strands on the middle columns on both sides, an upward pulling force is generated on the steel strand on this middle column 4, causing the part of the steel strand fixed on this middle column 4 to bend into a certain arc. In the current solution of fixing the steel strand with U-bolts, when the pulling force on the steel strand is relatively large, since the contact between the steel strand and the U-bolt is a point contact, the steel strand will slide significantly, increasing the friction between itself and the U-bolt, thereby causing damage to both, that is, the anti-pulling effect of the steel strand is poor. However, the first fastening plate 11 and the second fastening plate 22 provided in this application are both designed with arc surfaces and can closely fit the part of the steel strand 3 passing through the arc-shaped through hole. Since the contact area between the steel strand 3 and the first fastening plate 11 and the second fastening plate 22 is greatly increased, the fixing performance of the first pressing plate 1 and the second pressing plate 2 on the steel strand 3 is enhanced, thereby avoiding the friction between the steel strand 3 and the device and improving the anti-pulling effect of the steel strand 3.

[0049] In a feasible design, a second number of protrusions 1122 (i.e., the first protrusions) are provided in the groove 1121 of the first fastening plate 11.

[0050] Among them, the second number is set according to actual needs, and this application does not limit it. For example Figure 2 shown, the value of the second number is 8.

[0051] The shape of the first protrusion 1122 is set according to actual requirements, and the present application does not limit this. For example, the shape of the first protrusion 1122 can be a cuboid.

[0052] Exemplarily, as Figure 2 shown, every two first protrusions 1122 are distributed in the groove 1121 of the first fastening plate 11 in a positive or inverted eight-character shape, forming an anti-slip step.

[0053] In this example, the groove 1121 of the first fastening plate 11 is provided with the first protrusion 1122, which can increase the friction between the steel strand 3 and the groove 1121 of the first fastening plate 11, improve the stability of the steel strand 3 between the first pressing plate 1 and the second pressing plate 2, and thus improve the fixing effect of the device on the steel strand 3.

[0054] In a feasible design, the groove 2211 of the second fastening plate 22 is provided with a second number of protrusions 2212 (i.e., the second protrusion).

[0055] For the implementation manner of the second protrusion 2212, refer to the description of the first protrusion 1122 and Figure 4 the second pressing plate 2 shown, and details will not be elaborated here.

[0056] In this example, the groove 2211 of the second fastening plate 22 is provided with the protrusion 2212, which can increase the friction between the steel strand 3 and the groove 2211 of the second fastening plate 22, further improve the stability of the steel strand 3 between the first pressing plate 1 and the second pressing plate 2, and thus improve the fixing effect of the device on the steel strand 3.

[0057] In a feasible design, as Figure 2 shown, one end of the first fixing column 12 facing the second pressing plate 2 extends out of the second surface 112.

[0058] If one end of the first fixing column 12 facing the second pressing plate 2 is flush with the second surface 112, then the first fastening plate 11 and the second fastening plate 22 are completely attached, resulting in a fixed size of the space of the arc-shaped through hole between the two, and then the applicable size of the steel strand is also fixed. Therefore, the present application designs that one end of the first fixing column 12 facing the second pressing plate 2 extends out of the second surface 112. In this way, when assembling the first pressing plate 1 and the second pressing plate 2 with bolts, the part of the first fixing column 12 extending out of the second surface 112 can leave a gap between the first fastening plate 11 and the second fastening plate 22, which can not only strengthen the clamping effect on the steel strand 3, but also be applicable to steel strands of more sizes.

[0059] In a feasible design, as Figure 2 shown, the outer diameter of the part of the first fixing column 12 extending out of the second surface 112 is smaller than the outer diameter of the part of the first fixing column 12 not extending out of the second surface 112, which can save materials.

[0060] In a feasible design, as Figure 2 shown, first concave notches 1123 are respectively provided at both ends of the slot 1121 of the first fastening plate 11.

[0061] When the bottom plate 211 of the second pressing plate 2 is fixed to the lower surface of the cross beam 41 of the middle column 4, affected by its own gravity and the load weight, a line contact is formed between the bent portions of the steel strand 3 when extending out of both ends of the slot 1121 and the corresponding edges at both ends of the slot 1121. The pressure per unit area at the edges of the first fastening plate 11 at both ends of the slot 1121 is relatively large, and it is easy to damage the service life of the device. By providing the first concave notches 1123 in the above example, the bent portions of the steel strand 3 when extending out of both ends of the slot 1121 do not contact the corresponding edges at both ends of the slot 1121, and damage to the device can be reduced.

[0062] In a feasible design, as Figure 8 shown, second concave notches 2213 are respectively provided at both ends of the slot 2211 of the second fastening plate 22.

[0063] When the bottom plate 211 of the second pressing plate 2 is fixed to the upper surface of the cross beam 41 of the middle column 4, affected by its own gravity and the load weight, a line contact is formed between the bent portions of the steel strand 3 when extending out of both ends of the slot 2211 and the corresponding edges at both ends of the slot 2211. The pressure per unit area at the edges of the second fastening plate 22 at both ends of the slot 2211 is relatively large, and it is easy to damage the service life of the device. By providing the second concave notches 2213 in the above example, the bent portions of the steel strand 3 when extending out of both ends of the slot 2211 do not contact the corresponding edges at both ends of the slot 2211, and damage to the device can be reduced.

[0064] In a feasible design, as Figure 1 shown, in order to save materials for the bottom plate 211 and the support member 212, a slot is provided in the support member 212 of the support seat 21 facing the direction of the bottom plate 211, that is, the inside of the support member 212 is hollow.

[0065] Exemplarily, as Figure 3 shown, a part of the third side wall 122 of each first fixing column 12 is embedded into the first fastening plate 11, which can increase the area of the connection part between the first fixing column 12 and the first fastening plate 11 and strengthen the connection between the two. In addition, materials for the first fastening plate 11 are also saved. Similarly, as Figure 4 shown, a part of the fourth side wall 232 of each second fixing column 23 is embedded into the second fastening plate 22 and the support member 212.

[0066] The basic principles of the present application have been described in connection with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. Additionally, the specific details disclosed above are only for illustrative and facilitating understanding purposes and are not limitations. These details do not limit the present application to necessarily implement using the above specific details.

[0067] It should be understood that although the steps in the flowcharts of the accompanying drawings are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction for the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowcharts of the accompanying drawings may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same moment but can be executed at different moments, and their execution order is not necessarily sequential but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0068] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open-ended terms, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used herein refer to the word "and / or" and can be used interchangeably with it, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to" and can be used interchangeably with it.

[0069] It should also be noted that in the devices, equipment, and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application.

[0070] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0071] The foregoing description has been presented for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some of their variations, modifications, alterations, additions, and sub-combinations.

Claims

1. A central column steel strand fixing device, characterized in that: including a first pressing plate and a second pressing plate; The first pressing plate comprises a first fastening plate and at least two first fixing columns, wherein the first surface and the second surface opposite to each other in the first fastening plate are configured as arc surfaces, the second surface is provided with a groove, the first side wall and the second side wall opposite to each other in the first fastening plate are respectively fixedly connected to a first number of the first fixing columns, and each of the first fixing columns is provided with a threaded through hole; The second pressing plate includes a support seat, a second fastening plate and at least two second fixing columns, a raised supporting piece is provided in the middle part of the bottom plate of the support seat, through holes are provided on the bottom plate on both sides of the supporting piece, a second fastening plate is provided on the supporting piece, a third surface of the second fastening plate is set as an arc surface, a groove is provided on the third surface, the second fastening plate is fixedly connected to the supporting piece through a fourth surface opposite to the third surface, a first number of second fixing columns are respectively provided on the bottom plate on both sides of the supporting piece, each of the second fixing columns is provided with a threaded through hole, the first pressing plate is bolted to the at least two second fixing columns of the second pressing plate through the at least two first fixing columns, so as to tighten the steel strand between the groove of the first fastening plate and the groove of the second fastening plate.

2. The device according to claim 1, characterized in that A second number of protrusions are disposed in the groove of the first fastening plate.

3. The device according to claim 1 or 2, characterized in that: A second number of protrusions are disposed in the groove of the second fastening plate.

4. The device according to claim 1 or 2, characterized in that: One end of the first fixing column facing the second pressing plate extends out of the second surface.

5. The device according to claim 1 or 2, characterized in that: Both ends of the groove of the first fastening plate are respectively provided with first concave notches.

6. The device according to claim 1 or 2, characterized in that: Second concave notches are respectively provided at both ends of the groove of the second fastening plate.

7. The device according to claim 4, characterized in that An outer diameter of a portion of the first fixing post extending out of the second surface is smaller than an outer diameter of a portion of the first fixing post not extending out of the second surface.

8. The device according to claim 1 or 2, characterized in that: The support member of the support seat is provided with a groove in the direction of the bottom plate.

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