A device and system for flatbed adjustment

Abstract

The utility model relates to the technical field of prestressed beam, especially relates to a device and system for putting and adjusting. A device for putting and adjusting, include: displacement system, displacement system includes at least two passive wedge and at least one initiative wedge, initiative wedge sets up between two passive wedges of adjacent among them, initiative wedge moves along its height direction and makes that the interval of two passive wedges of adjacent increases or reduces, and the interval of two passive wedges of adjacent increases or reduces drives the interval of anchorage device and pedestal to increase or reduce;Adjusting system is used for adjusting the displacement of displacement system, and adjusting system includes connecting band, at least one initiative piece and at least two passive piece, wherein one initiative piece is connected to initiative wedge, and two passive pieces are connected to two passive wedges respectively, and connecting band surrounds initiative piece and passive piece on its both sides, and initiative piece is used for driving initiative wedge to move along its height direction.

Description

Technical Field

[0001] This utility model relates to the technical field of prestressed beams, and in particular to a device and system for tension release and adjustment. Background Technology

[0002] Prestressed concrete beams can be prefabricated in the factory, reducing on-site wet work, reducing labor, and improving the quality and production efficiency of precast beams.

[0003] Prestressed prestressing technology is simple in principle, convenient to operate, and has simplified procedures. Prestressed prestressed components produced using this method do not require drilling, threading, grouting, or anchoring, thus reducing the need for corrugated pipes and internal grouting materials. However, because prestressed prestressing uses a distributed strand arrangement, with the prestressed steel strands dispersed within the main beam, individual strands must be cut during release, and this process generates significant impact, affecting the quality of the prestressed beam. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology where the stress is suddenly released during the release process of prestressed beams made by the pre-tensioning method, which affects the quality of the prestressed beams, and to provide a device and system for tension adjustment.

[0005] In a first aspect, the present invention provides a device for tension adjustment, comprising: The displacement system includes at least two passive wedges and at least one active wedge, wherein the active wedge is disposed between two adjacent passive wedges, and the active wedge moves along its height direction to increase or decrease the distance between the two adjacent passive wedges, and the increase or decrease in the distance between the two adjacent passive wedges causes the distance between the anchor and the platform to increase or decrease. An adjustment system is provided for adjusting the displacement of the displacement system. The adjustment system includes a connecting belt, at least one active component, and at least two passive components. One active component is connected to the active wedge block, and the two passive components are respectively connected to the two passive wedge blocks. The connecting belt surrounds the active component and the passive components on both sides thereon. The active component is used to drive the active wedge block to move along its height direction.

[0006] The system employs a passive wedge block and at least one active wedge block, with the active wedge block positioned between two adjacent passive wedge blocks. Moving the wedge block along its height changes the distance between the two adjacent passive wedge blocks, thus releasing tension. Compared to existing tensioning platforms where sudden stress release can occur, this method, by moving the active wedge block to change the distance between the two adjacent passive wedge blocks, provides more precise tension control and a more gradual stress release. Furthermore, by assigning active and passive components to the active and passive wedge blocks respectively, and having both components connected by a connecting belt, the movement of the active and passive wedge blocks exhibits good synchronization, simplifying operation.

[0007] Preferably, both the bottom surface of the active wedge block and the bottom surface of the passive wedge block can be detachably provided with support pads.

[0008] The bottom surfaces of the active wedge block and the passive wedge block are detachably equipped with support pads, which can be placed on the bottom surfaces of the active wedge block and the passive wedge block when tensioning is not performed, to support the active wedge block and prevent it from falling.

[0009] Preferably, a plurality of support members are provided below the active wedge block and / or the passive wedge block, the support members being used to support the support pad block.

[0010] The installation of support pads for the supporting components helps to improve the structural stability of this device.

[0011] Preferably, the active wedge block is provided with a strip-shaped through hole, the length direction of which is parallel to the height direction of the active wedge block, and the strip-shaped through hole is used to accommodate prestressed steel strands.

[0012] Because the active wedge block moves during the tensioning process, a strip-shaped through hole is provided. The length of the strip-shaped through hole is parallel to the height of the active wedge block, which can prevent the prestressed steel strand from bending.

[0013] Preferably, the active component is externally connected to a motor, which drives the active component to move along the length direction of the active wedge block, and the movement of the active component causes the active wedge block to move.

[0014] Preferably, when the length of the line connecting the default positions of the active component and its two adjacent passive components is greater than the distance between the two passive components, a fixing component is provided at one end of the connecting strip. The fixing component is used to fix the connecting strip, and the length of the other end extending out of the fixing component is adjusted to adjust the perimeter of the enclosed area of ​​the connecting strip. By adjusting the perimeter of the enclosed area of ​​the connecting strip, the active wedge block is driven to move along its length direction.

[0015] The default positions of the active and passive components are those of the passive and active wedges during tensioning. Reducing the perimeter of the enclosed area of ​​the connecting strip causes the active component to move closer to the passive component, resulting in the active component moving up or down, and consequently adjusting the spacing between adjacent passive wedges. When the length of the line connecting the default positions of the active and passive components is greater than the spacing between the two passive components, the default positions of the active component and its two adjacent passive components are not on a straight line. Reducing the perimeter of the enclosed area can cause the active component to move towards the passive component.

[0016] Preferably, the driving component is a pulley or a rivet, and the driven component is a pulley or a rivet.

[0017] Preferably, a friction-reducing component is provided between the active wedge block and the passive wedge block.

[0018] A friction-reducing component is provided between the active wedge block and the passive wedge block to avoid affecting the movement of the active wedge block.

[0019] Preferably, the friction-reducing component is a PTFE sliding plate, an ultra-high molecular weight polyethylene plate, or a stainless steel plate.

[0020] In a second aspect, the present invention provides a system for tension adjustment, comprising an anchor, a platform, and a tension adjustment device as described above, wherein a passive wedge is connected to the anchor and a passive wedge is connected to the platform.

[0021] A system for tension adjustment includes the aforementioned tension adjustment device, which makes the prestress release more gradual and avoids sudden stress release as much as possible.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a device for tensioning adjustment, including a displacement system and an adjustment system. The displacement system includes at least two passive wedges and at least one active wedge, with the active wedge positioned between two adjacent passive wedges. Moving the wedge along its height direction changes the distance between the two adjacent passive wedges, thus releasing tension. Compared to existing tensioning platforms where sudden stress release occurs, this device, by moving the active wedge to change the distance between the two adjacent passive wedges, provides more accurate tensioning control and a more gradual stress release. The adjustment system includes active and passive components, which are respectively positioned on the active and passive wedges and connected by a connecting belt. This ensures good synchronization of movement between the active and passive wedges and simplifies operation. This application overcomes the shortcomings of existing technologies where sudden stress release during the tensioning process of prestressed beams produced using the pre-tensioning method affects the quality of the prestressed beam.

[0023] 2. This utility model provides a system for tension adjustment, including the above-mentioned device for tension adjustment, so that the prestress is released more gently, and the sudden release of stress is avoided as much as possible. Attached Figure Description

[0024] Figure 1 This is a side view of a device for tension adjustment according to the present invention. Figure 1 ; Figure 2 This is a front view of a device for tension adjustment according to the present invention; Figure 3 This is a top view of a device for tension adjustment according to the present invention; Figure 4 This is a side view of a device for tension adjustment according to the present invention. Figure 2 ; Figure 5 This is a side view of a device for tension adjustment according to the present invention. Figure 3 ; Figure 6 This is a side view of a device for tension adjustment according to the present invention. Figure 4 ; Figure 7 This is a side view of a device for tension adjustment according to the present invention. Figure 5 ; icon: 1-Passive wedge block, 101-Passive component, 2-Active wedge block, 201-Active component, 3-Anchor, 4-Platform, 5-Connecting strip, 6-Support pad, 7-Support component, 8-Strip through hole, 9-Friction reduction component, 10-Prestressed beam, 11-Prestressed steel strand, 12-Bolt. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0026] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0028] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0029] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0030] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0031] Example 1 like Figures 1 to 7 As shown, a device for tension adjustment includes: The displacement system includes at least two passive wedges 1 and at least one active wedge 2. The active wedge 2 is disposed between two adjacent passive wedges 1. The active wedge 2 moves along its height direction, causing the distance between the two adjacent passive wedges 1 to increase or decrease. The increase or decrease in the distance between the two adjacent passive wedges 1 causes the distance between the anchor 3 and the platform 4 to increase or decrease. An adjustment system is provided for adjusting the displacement of the displacement system. The adjustment system includes a connecting belt 5, at least one active member 201, and at least two passive members 101. One active member 201 is connected to the active wedge block 2, and the two passive members 101 are respectively connected to the two passive wedge blocks 1. The connecting belt 5 surrounds the active member 201 and the passive members 101 on both sides thereon. The active member 201 is used to drive the active wedge block 2 to move along its height direction.

[0032] A passive wedge block 1 and at least one active wedge block 2 are provided, with the active wedge block 2 positioned between two adjacent passive wedge blocks 1. Moving the wedge block along its height direction changes the distance between the two adjacent passive wedge blocks 1, thus releasing tension. Compared to the existing tensioning platform 4, which can experience sudden stress release, moving the active wedge block 2 to change the distance between the two adjacent passive wedge blocks 1 results in more accurate tension control and a more gradual stress release. Active components 201 and passive components 101 are respectively provided on the active wedge block 2 and passive wedge block 1, and both are surrounded by a connecting belt 5. This ensures good synchronization of the movement of the active wedge block 2 and passive wedge block 1, simplifying operation.

[0033] In this embodiment, only two passive wedge blocks 1 and one active wedge block 2 are provided. In actual use, the number of passive wedge blocks 1 and active wedge blocks 2 is determined according to the actual situation. As long as the movement of the active wedge block 2 can drive the distance between two adjacent passive wedge blocks 1 to change, thereby driving the distance between the anchor 3 and the platform 4 to change, this application does not impose any additional restrictions.

[0034] In this embodiment, both the passive wedge block 1 and the active wedge block 2 are set vertically. Therefore, the vertical movement of the active wedge block 2 causes the passive wedge block 1 to move horizontally. In actual use, the passive wedge block 1 and the active wedge block 2 can be set horizontally according to the usage environment or other factors. In this case, the direction of movement of the active wedge block 2 needs to be adjusted according to the actual setting. This application does not impose any restrictions.

[0035] This embodiment is mainly used for tension release, therefore, during the tension release process, such as Figures 1 to 6 As shown, moving the active wedge 2 downward reduces the distance between the two adjacent passive wedges 1, thereby reducing the distance between the anchor 3 and the platform 4, thus releasing tension. However, in actual use, this device can also be used for the tensioning process, and this application does not impose any restrictions.

[0036] Furthermore, such as Figure 1 and Figure 2 As shown, both the bottom surfaces of the active wedge block 2 and the passive wedge block 1 can be detachably equipped with support pads 6, so that when tensioning is not performed, the support pads 6 can be placed on the bottom surfaces of the active wedge block 2 and the passive wedge block 1 to support the active wedge block 2 and prevent it from falling.

[0037] Furthermore, such as Figure 2 As shown, several support members 7 are provided below the active wedge block 2 and / or the passive wedge block 1. Figure 1 (Not shown in the image), the support member 7 is used to support the support pad 6. In this embodiment, the support member 7 is an angle steel. In actual use, the support member 7 can also be other types of steel, and this application does not impose any restrictions. In actual use, the support member 7 can be provided only below the active wedge block 2, or only below the passive wedge block 1, or both the active wedge block 2 and the passive wedge block 1 can be provided with support members 7.

[0038] Furthermore, such as Figure 1 and Figure 7 As shown, the active wedge block 2 is provided with a strip-shaped through hole 8. The length direction of the strip-shaped through hole 8 is parallel to the height direction of the active wedge block 2. The strip-shaped through hole 8 is used to accommodate the prestressed steel strand. Because the active wedge block 2 will move during the tensioning process, the strip-shaped through hole 8 is provided. The length direction of the strip-shaped through hole 8 is parallel to the height direction of the active wedge block 2, which can prevent the prestressed steel strand from bending.

[0039] Furthermore, the active component 201 is externally connected to a motor ( Figures 1-7 (not shown in the image), the motor is used to drive the active component 201 to move along the length direction of the active wedge block 2, and the movement of the active component 201 causes the active wedge block 2 to move.

[0040] As an alternative, such as Figure 7 As shown, when the length of the line connecting the default positions of the active component 201 and its two adjacent passive components 101 is greater than the distance between the two passive components 101, a fixing component is provided at one end of the connecting strip 5. Figure 7(Not shown in the image), the fastener is used to fix the connecting band 5. Adjusting the length of the other end extending beyond the fastener adjusts the perimeter of the enclosed area of ​​the connecting band 5. Adjusting the perimeter of the enclosed area of ​​the connecting band 5 causes the active wedge block 2 to move along its length. The default positions of the active component 201 and the passive component 101 are the positions of the passive wedge block 1 and the active wedge block 2 during tensioning. Decreasing the perimeter of the enclosed area of ​​the connecting band 5 causes the active component 201 to approach the passive component 101, thereby causing the active component 201 to move up or down, and thus adjusting the distance between two adjacent passive wedge blocks 1. When the length of the line connecting the default positions of the active component 201 and the passive component 101 is greater than the distance between the two passive components 101, the default positions of the active component 201 and its two adjacent passive components 101 are not on a straight line. Decreasing the perimeter of the enclosed area can cause the active component 201 to move toward the passive component 101. The fastener can be a removable structure such as a clamp or buckle; this application does not impose any restrictions.

[0041] Furthermore, the active component 201 is a pulley or a rivet, and the passive component 101 is a pulley or a rivet.

[0042] Furthermore, a friction-reducing component 9 is provided between the active wedge block 2 and the passive wedge block 1.

[0043] The friction-reducing component 9 is a PTFE sliding plate, an ultra-high molecular weight polyethylene plate, or a stainless steel plate.

[0044] Example 2 A system for tension adjustment includes an anchor 3, a platform 4, and a tension adjustment device as described in Embodiment 1, wherein a passive wedge 1 is connected to the anchor 3, and the passive wedge 1 is connected to the platform 4 by bolts 12. The platform 4 is connected to the prestressed beam 10.

[0045] The above content is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for tension adjustment, characterized in that, include: The displacement system includes at least two passive wedges (1) and at least one active wedge (2), wherein the active wedge (2) is disposed between two adjacent passive wedges (1), and the active wedge (2) moves along its height direction to increase or decrease the distance between the two adjacent passive wedges (1), and the increase or decrease in the distance between the two adjacent passive wedges (1) causes the distance between the anchor (3) and the platform (4) to increase or decrease. An adjustment system is used to adjust the displacement of the displacement system. The adjustment system includes a connecting belt (5), at least one active member (201), and at least two passive members (101). One active member (201) is connected to the active wedge (2), and the two passive members (101) are respectively connected to the two passive wedges (1). The connecting belt (5) surrounds the active member (201) and the passive members (101) on both sides thereon. The active member (201) is used to drive the active wedge (2) to move along its height direction.

2. The device for tension adjustment according to claim 1, characterized in that, Both the bottom surface of the active wedge block (2) and the bottom surface of the passive wedge block (1) can be detachably provided with support pads (6).

3. The device for tension adjustment according to claim 2, characterized in that, Several support members (7) are provided below the active wedge block (2) and / or the passive wedge block (1), and the support members (7) are used to support the support pad block (6).

4. A device for tension adjustment according to any one of claims 1-3, characterized in that, The active wedge block (2) is provided with a strip-shaped through hole (8), the length direction of which is parallel to the height direction of the active wedge block (2), and the strip-shaped through hole (8) is used to accommodate prestressed steel strands.

5. A device for tension adjustment according to any one of claims 1-3, characterized in that, The active component (201) is externally connected to a motor, which is used to drive the active component (201) to move along the length direction of the active wedge block (2). The movement of the active component (201) causes the active wedge block (2) to move.

6. A device for tension adjustment according to any one of claims 1-3, characterized in that, When the length of the line connecting the default positions of the active component (201) and its two adjacent passive components (101) is greater than the distance between the two passive components (101), a fixing component is provided at one end of the connecting band (5). The fixing component is used to fix the connecting band (5). The length of the other end extending out of the fixing component is adjusted to adjust the perimeter of the enclosed area of ​​the connecting band (5). By adjusting the perimeter of the enclosed area of ​​the connecting band (5), the active wedge block (2) is driven to move along its length direction.

7. A device for tension adjustment according to any one of claims 1-3, characterized in that, The active component (201) is a pulley or a rivet, and the passive component (101) is a pulley or a rivet.

8. A device for tension adjustment according to any one of claims 1-3, characterized in that, A friction-reducing component (9) is provided between the active wedge block (2) and the passive wedge block (1).

9. The device for tension adjustment according to claim 8, characterized in that, The friction-reducing component (9) is a PTFE sliding plate, an ultra-high molecular weight polyethylene plate, or a stainless steel plate.

10. A system for tension adjustment, characterized in that, It includes an anchor (3), a platform (4), and a device for tension adjustment as described in any one of claims 1-9, wherein a passive wedge (1) is connected to the anchor (3) and a passive wedge (1) is connected to the platform (4).

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