Lifting type tensioning platform for cantilever cover beam

Abstract

The utility model relates to a lifting type tensioning platform for a cantilever cover beam. The lifting type tensioning platform comprises a fixed frame body; the lifting frame body is arranged on the fixed frame body in a sliding manner; the chain block is arranged at the top of the fixed frame body, the chain block is connected with the lifting frame body, and the lifting frame body can be pulled to move upwards along the fixed frame body through the chain block; and the working platform is arranged at the bottom of the lifting frame body. According to the working platform, the height can be accurately adjusted through the chain block, so that the problem caused by inaccurate height control of the platform is solved, and the height adjusting function is flexible, free, simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of construction platforms, in particular to a lifting tensioning platform for cantilever cap beams. Background Art

[0002] Cantilever cap girder construction is a crucial component of bridge construction. Prestressing during construction is crucial for ensuring structural stability and safety. Therefore, the construction platform is crucial, requiring consideration of safety, stability, convenience, and affordability. Currently, the tensioning platforms suitable for cantilever cap girder construction are extremely simple, constructed from various welded steel sections and plates. Because the construction platforms used for each cap girder and Bailey support vary in height, the tensioning process for each cap girder requires repeated disassembly and installation of the platform. Frequent adjustments to the platform height are extremely inconvenient, time-consuming, and labor-intensive. The platform also lacks safety precautions and is prone to accidents. Furthermore, imprecise platform height control prevents the tensioning equipment from maintaining the same level as the prestressed steel strands, indirectly leading to prestress loss, concrete shedding at the anchor end, and significant equipment damage. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a lifting tensioning platform for cantilever cap beams, so as to solve the problems of the existing simple platforms that are inconvenient to use, time-consuming and labor-intensive due to repeated disassembly, installation and frequent height adjustment, and to solve the problems of prestress loss, falling off of concrete at the anchor end and easy damage to equipment due to inaccurate height control of the platform.

[0004] The technical solution to achieve the above purpose is:

[0005] The utility model provides a lifting tensioning platform for a cantilever cap beam, comprising:

[0006] Fixed frame;

[0007] A lifting frame slidably mounted on the fixed frame;

[0008] A hand chain hoist is provided on the top of the fixed frame, the hand chain hoist is connected to the lifting frame, and the lifting frame can be pulled upward along the fixed frame by the hand chain hoist;

[0009] A working platform is arranged at the bottom of the lifting frame.

[0010] A further improvement of the lifting tensioning platform for cantilever cap beams of the utility model is that a vertical track is provided on the fixed frame;

[0011] The lifting frame is slidably arranged in the vertical track, and a fixed roller is arranged in the vertical track corresponding to the lifting frame.

[0012] A further improvement of the lifting tensioning platform for the cantilever cap beam of the utility model is that a stay cable is provided on the side of the fixed frame.

[0013] A further improvement of the lifting tensioning platform for the cantilever cap beam of the utility model is that a guardrail is provided at the lower portion of the lifting frame.

[0014] A further improvement of the lifting tensioning platform for cantilever cap beams of the present invention is that the fixed frame includes a plurality of columns and a plurality of cross bars connecting the plurality of columns, wherein some of the cross bars are arranged at the bottom of the columns and some are arranged at the top of the columns.

[0015] A further improvement of the lifting tensioning platform for cantilever cap beams of the present invention is that the lifting frame includes guide rods corresponding to the columns, and the guide rods are slidably arranged in the corresponding columns;

[0016] The bottom of the guide rod is connected to the working platform;

[0017] A guide groove is provided on the column corresponding to the connection between the guide rod and the working platform.

[0018] A further improvement of the lifting tensioning platform for the cantilever cap beam of the utility model is that the sling of the hand chain hoist is connected to the top of the guide rod.

[0019] A further improvement of the lifting tensioning platform for the cantilever cap beam of the present invention is that the working platform is a platform plate laid on the bottom of the lifting frame.

[0020] A further improvement of the lifting tensioning platform for the cantilever cap beam of the utility model is that the fixed frame and the lifting frame are square frames.

[0021] A further improvement of the lifting tensioning platform for cantilever cap beams of the utility model is that it further comprises a fixing rod connected to the middle portion of the fixing frame, wherein a portion of the fixing rod extends out of the fixing frame to form a fixed end;

[0022] The fixed end can be placed on the cantilever cap beam, and a weight is pressed on the fixed end.

[0023] The beneficial effects of the lifting tensioning platform for cantilever cap beams of the utility model are:

[0024] The working platform provided by the utility model can be accurately adjusted in height by a hand chain hoist to solve the problem caused by inaccurate height control of the platform, and the height adjustment function is flexible, free, simple and convenient.

[0025] The platforms of the utility model are connected into a whole, which can realize the overall lifting and disassembly, and has a high turnover utilization rate, which is in line with the development direction of high-quality, high-efficiency and green construction of modern engineering.

[0026] The platform of the utility model has low cost, simple structure, quick and convenient use, and can be used as an auxiliary platform for the two-time tensioning construction of the cantilever cap beam, and the construction height can be freely adjusted. It can also be used as a construction platform for the side repair and maintenance of the cantilever cap beam. The platform saves manpower and machinery costs, shortens the construction period, improves the construction quality, and complies with the concept of green construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The utility model is a structural schematic diagram of a lifting tensioning platform for a cantilever cap beam being fixed on a Bailey beam support during the first tensioning.

[0028] Figure 2 This is a structural schematic diagram of the lifting tensioning platform for the cantilever cap beam of the utility model being arranged on the cantilever cap beam during the second tensioning.

[0029] Figure 3 This is a structural schematic diagram of the other side of the lifting tensioning platform for the cantilever cap beam of the utility model. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] See Figure 1 The utility model provides a lifting tensioning platform for cantilever cap beams, which adopts steel sections as the main body and guides the guide rods for directional movement by setting fixed rollers, so that the entire platform can be flexibly moved up and down. Construction workers can freely adjust the construction height of the work platform through the hand hoist on the top. Guardrails are also set around the platform to ensure the safety of construction workers. The bottom of the fixed frame is mechanically tied and fixed to the Bailey beam bracket, and the overall stability of the platform is enhanced by setting inclined cables on the columns. The tensioning platform of the utility model is convenient for obtaining materials, easy to construct, and highly practical. It improves the overall turnover utilization rate of materials and is in line with the development direction of high-quality, efficient and green construction of modern engineering. The lifting tensioning platform for cantilever cap beams of the utility model is described below with reference to the accompanying drawings.

[0032] See Figure 1 , showing the structural diagram of the lifting tensioning platform for cantilever cap beam fixed on the Bailey beam support during the first tensioning of the utility model. Figure 3 , shows the structural diagram of the other side of the lifting tensioning platform for cantilever cap beam of the utility model. Figure 1 and Figure 3 , the lifting tensioning platform for the cantilever cap beam of the utility model is described.

[0033] like Figure 1 and Figure 3 As shown, the lifting tensioning platform for cantilever cap beam of the utility model includes a fixed frame 21, a lifting frame 22, a hand hoist 23 and a working platform 24, wherein the lifting frame 22 is slidably arranged on the fixed frame 21, and the lifting frame 22 can be adjusted to move up and down relative to the fixed frame 21; the hand hoist 23 is arranged at the top of the fixed frame 21, and the hand hoist 23 is connected to the lifting frame 22, and the lifting frame 22 can be pulled upward along the fixed frame 21 by the hand hoist 23; the working platform 24 is arranged at the bottom of the lifting frame 22.

[0034] When in use, the working platform 24 provides a platform for placing the tensioning equipment and also provides a working space for the workers. When tensioning the cantilever cap beam, the bottom of the fixed frame 21 can be fixed to the Bailey beam bracket 11 below the cantilever cap beam 10, and can be fixed to the distribution beam of the Bailey beam bracket 11 by mechanical connection and fixation, such as by tying with ropes. After fixing the fixed bracket 21, the tensioning equipment is placed on the working platform 24, and then the lifting frame 22 is pulled by the hand hoist 23 to adjust its setting height. Then, the cantilever cap beam 10 is tensioned for the first time. After completion, the equipment is called back to let the lifting frame 22 fall back, the tensioning equipment is removed, the fixed frame 21 is released, and the tensioning platform is hoisted and removed as a whole.

[0035] In a specific embodiment of the present invention, a vertical track is provided on the fixed frame 21 , the lifting frame 22 is slidably arranged in the vertical track, and a fixed roller 213 is provided in the vertical track corresponding to the lifting frame 22 .

[0036] When the lifting frame 22 is moving along the vertical track, the fixed roller 213 is in contact with the corresponding part of the lifting frame 22 , thereby guiding and limiting the lifting movement of the lifting frame 22 .

[0037] Furthermore, a plurality of pairs of fixed rollers 213 are provided, and each pair of fixed rollers 213 is disposed on two opposite sides of a corresponding portion of the lifting frame 22 .

[0038] In a preferred embodiment, the vertical track is U-shaped, and the vertical portion of the lifting frame 22 is slidably arranged in the U-shaped vertical track. Fixed rollers 213 are provided on the inner sides of the two opposite side walls of the U-shaped vertical track. The lifting frame 22 includes a vertical guide rod adapted to the vertical track, and the vertical guide rod is slidably arranged in the vertical track.

[0039] In a specific embodiment of the present invention, a stay cable 25 is provided on the side of the fixed frame 21. When the fixed frame 21 is fixed, the stay cable 25 is straightened and fixedly connected to the Bailey beam support 11 in an inclined shape. The stay cables 25 are arranged obliquely on both sides of the fixed frame 21 to improve the stability of the fixed frame 21.

[0040] In a specific embodiment of the present invention, a guardrail 26 is provided at the lower portion of the lifting frame 22. The guardrail 26 is a push-pull guardrail that can be opened by pushing and pulling to allow the tensioning equipment and construction workers to enter and exit.

[0041] Preferably, the guardrail 26 is locked and connected by fixing the buckle and the latch. When the guardrail needs to be opened, it is only necessary to unlock the latch, open the buckle, and push the guardrail open. The reverse operation can achieve the closing of the guardrail.

[0042] In a specific embodiment of the present invention, Figure 1 and Figure 3 As shown, the fixing frame 21 includes a plurality of columns 211 and a plurality of cross bars 212 connecting the plurality of columns 211 . Part of the cross bars 212 is disposed at the bottom of the columns 211 , and part of the cross bars 212 is disposed at the top of the columns 211 .

[0043] Preferably, the upright posts 211 and the crossbars 212 are both square tubes, which may be steel tubes or galvanized steel tubes.

[0044] Furthermore, the fixed frame 21 is a square frame. Specifically, the square frame includes four upright posts 211, which are located at the four corners of the square. The square frame also includes eight crossbars 212, four of which are located at the tops of the upright posts 211, and four crossbars 212 are located at the bottoms of the upright posts 211. The four upright posts 212 are connected together by the crossbars 212. To improve support for the work platform 24, multiple wooden strips are tied and fixed to the crossbars 212 at the bottoms of the upright posts 212, which support the bottom of the work platform 24.

[0045] Furthermore, the lifting frame 22 includes guide rods 221 corresponding to the columns 211. The guide rods 221 are slidably mounted within the corresponding columns 211. The bottoms of the guide rods 221 are connected to the work platform 24. Guide grooves are defined on the columns 211 at the junctions between the guide rods 221 and the work platform 24. The guide grooves are vertically arranged, and their length matches the desired height adjustment of the lifting frame 22.

[0046] Preferably, there are four guide rods 221 , which are arranged in a one-to-one correspondence with the columns 211 .

[0047] Furthermore, a base 222 is provided at the bottom of the guide rod 221 , and is connected to the working platform 24 via the base 222 .

[0048] The lifting frame 22 is a square frame, specifically, including four guide rods 221. The guide rods 221 are vertically arranged, and a transverse pull rod is also provided at the position of the guide groove on the corresponding column. The transverse pull rod connects the corresponding two guide rods. The transverse pull rod can be set at the top of the guide rod, or at the bottom of the guide rod, or at both the top and bottom of the guide rod.

[0049] Furthermore, if Figure 3 As shown, a connecting rod 223 is connected to the top of the two guide rods 221, and the connecting rod 223 is connected to the corresponding sling 231 on the hand chain hoist 23. The connecting rod 223 is also correspondingly arranged at the position of the guide groove.

[0050] Alternatively, the top of the guide rod 221 is connected to the sling 231 of the hand hoist 23 .

[0051] The hand chain hoist 23 further includes a pull rope 232 , and by pulling the pull rope 232 , the sling 231 can be pulled, thereby pulling the guide rod 221 of the lifting frame 22 to move upward.

[0052] In a specific embodiment of the present invention, the working platform 24 is a platform plate laid on the bottom of the lifting frame 22. The working platform 24 is preferably made of steel plate.

[0053] Further, if Figure 2 As shown, it also includes a fixing rod 27 connected to the middle part of the fixing frame 21, and a portion of the fixing rod 27 extends out of the fixing frame 21 to form a fixed end; the fixed end can be placed on the cantilever cap beam 10, and a weight 28 is pressed on the fixed end.

[0054] When the cantilever cap beam 10 is tensioned for the second time, the Bailey beam support has been removed, and the tensioning platform is fixed to the cantilever cap beam 10 in a cantilevered state by the provided fixing rod 27. The fixing rod 27 is preferably made of channel steel, and at least two are provided.

[0055] The lifting tensioning platform for the cantilever cap beam of the utility model has low cost, simple structure, quick and convenient use, can be used for the two-time tensioning construction of the cantilever cap beam, can freely adjust the construction height, and can also be used for the side repair and maintenance of the cantilever cap beam. The platform saves manpower and machinery costs, shortens the construction period, improves the construction quality, and complies with the concept of green construction.

[0056] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A lifting tensioning platform for a cantilever cap beam, characterized in that: include: Fixed frame; A lifting frame slidably mounted on the fixed frame; A hand chain hoist is provided on the top of the fixed frame, the hand chain hoist is connected to the lifting frame, and the lifting frame can be pulled upward along the fixed frame by the hand chain hoist; A working platform is arranged at the bottom of the lifting frame.

2. The lifting tensioning platform for cantilever cap beam according to claim 1, characterized in that: The fixed frame is provided with a vertical track; The lifting frame is slidably arranged in the vertical track, and a fixed roller is arranged in the vertical track corresponding to the lifting frame.

3. The lifting tensioning platform for cantilever cap beam according to claim 1, characterized in that: A stay cable is provided on the side of the fixing frame.

4. The lifting tensioning platform for cantilever cap beam according to claim 1, characterized in that: A guardrail is provided at the lower portion of the lifting frame.

5. The lifting tensioning platform for cantilever cap beam according to claim 1, characterized in that: The fixing frame includes a plurality of columns and a plurality of cross bars connecting the plurality of columns. Part of the cross bars is arranged at the bottom of the columns, and part of the cross bars is arranged at the top of the columns.

6. The lifting tensioning platform for cantilever cap beam according to claim 5, characterized in that: The lifting frame includes a guide rod corresponding to the column, and the guide rod is slidably arranged in the corresponding column; The bottom of the guide rod is connected to the working platform; A guide groove is provided on the column corresponding to the connection between the guide rod and the working platform.

7. The lifting tensioning platform for cantilever cap beam according to claim 6, characterized in that: The sling of the hand chain hoist is connected to the top of the guide rod.

8. The lifting tensioning platform for cantilever cap beam according to claim 1, characterized in that: The working platform is a platform plate laid on the bottom of the lifting frame.

9. The lifting tensioning platform for cantilever cap beam according to claim 1, characterized in that: The fixed frame and the lifting frame are square frames.

10. The lifting tensioning platform for cantilever cap beam according to claim 1, characterized in that: It also includes a fixing rod connected to the middle portion of the fixing frame, wherein a portion of the fixing rod extends out of the fixing frame to form a fixing end; The fixed end can be placed on the cantilever cap beam, and a weight is pressed on the fixed end.

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