Box girder bottom plate tooth block steel beam tensioning jack mounting device

Abstract

A box girder bottom plate tooth block steel beam tensioning jack mounting device belongs to the technical field of continuous beam and continuous rigid frame bridge construction and comprises two embedded pipes, the two embedded pipes are arranged on a box girder top plate, a guide rope is communicated between the two embedded pipes, the two ends of the guide rope are fixed through anchoring assemblies, and the anchoring assemblies are connected with the two embedded pipes. A moving assembly capable of horizontally moving in the length direction of the guide rope is arranged on the horizontal section of the guide rope, a chain block is connected to the moving assembly, and a jack is connected to the chain block. The jack can move forwards, backwards, upwards and downwards, so that the mounting efficiency of the jack is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous beam and continuous rigid frame bridge construction, and relates to the safety technology for installing a tensioning jack of a steel tendon in a tooth block at the bottom plate of a bridge, in particular to an installation device for a tensioning jack of a steel tendon in a tooth block at the bottom plate of a box girder. Background Art

[0002] Nowadays, with the rapid development of highways and railways, the proportion of high-pier and long-span continuous rigid frames and continuous beam bridges is also increasing. Steel tendons are arranged on the bottom plates of high-pier and long-span bridges to form an integral body of two T-shaped structures. The steel strands at the bottom plate are tensioned and locked through tooth blocks. However, since the tooth blocks are located on the bottom plate of the box girder, lifting equipment cannot be used for installing the jacks.

[0003] Traditionally, for the tensioning of the steel tendon in the tooth block, a steel rod is inserted into the pull rod hole of the box girder web, and then a manual hoist is used to install the jack. Such an installation method has low installation efficiency, high safety risks, consumes a large amount of human resources, and has high requirements for the height of the pull rod hole.

[0004] Therefore, an installation device for a tensioning jack of a steel tendon in a tooth block at the bottom plate of a box girder is needed, which can improve the installation efficiency of the jack, reduce the safety risks during the installation process of the jack, and has a simple structure, convenient installation and removal. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide an installation device for a tensioning jack of a steel tendon in a tooth block at the bottom plate of a box girder, which is used to solve the technical problems of low installation efficiency, high safety risks and large consumption of human resources in the installation of the tensioning jack of the steel tendon in the tooth block in the prior art.

[0006] To achieve the above purpose and other related purposes, the present utility model provides an installation device for a tensioning jack of a steel tendon in a tooth block at the bottom plate of a box girder, which includes two embedded pipes. The two embedded pipes are arranged on the top plate of the box girder, and a guide rope is connected between the two embedded pipes. Both ends of the guide rope are fixed through an anchoring component. A moving component that can move horizontally along the length direction of the guide rope is arranged on the horizontal section of the guide rope. A manual hoist is connected to the moving component, and a jack is connected to the manual hoist.

[0007] Preferably, in any of the above solutions, the anchoring component includes a base, the base is fixed on the top plate of the box girder, an anchor plate is fixedly connected above the base, and a positioning pipe is fixedly connected below the base.

[0008] Preferably, in any of the above solutions, circular limiting grooves are respectively arranged at the centers of the top and bottom of the base. The anchor plate is located in the circular limiting groove, and after the positioning pipe extends into the circular limiting groove, it is welded to the base.

[0009] Preferably, in any of the above solutions, a wedge groove is provided at the center of the top of the anchor plate, and both ends of the guide rope pass through the anchor plate and are fixed with wedges.

[0010] Preferably, in any of the above solutions, a reversing rod is welded to the bottom of the positioning pipe, and a trapezoidal notch is provided at the bottom of the positioning pipe in the direction perpendicular to the length of the reversing rod.

[0011] Preferably, in any of the above solutions, the moving assembly includes two traveling wheels, the two traveling wheels are connected to a connecting plate, the chain block is connected to the connecting plate, trapezoidal grooves corresponding to the cross-sectional width of the guide rope are provided on the surfaces of the two traveling wheels, and the traveling wheels are placed on the guide rope through the trapezoidal grooves and can move along the length direction of the guide rope.

[0012] Preferably, in any of the above solutions, two bearings are fixedly connected to the middle of the connecting plate, the centers of the two bearings are on the same horizontal line, a rotating shaft is fixedly connected inside the bearings, and the other end of the rotating shaft is fixedly connected to the center of the traveling wheel.

[0013] Preferably, in any of the above solutions, side plates are welded to both sides of the connecting plate, end plates are welded between the two side plates, and a restraining plate is also welded between the two side plates, and the restraining plate is arranged below the traveling wheel.

[0014] Preferably, in any of the above solutions, pin holes are symmetrically provided at the centers of the two end plates, a pin shaft is fixedly connected between the two pin holes, a hook is fixedly connected to the middle of the pin shaft, and the chain block is connected to the moving assembly through the hook.

[0015] Preferably, in any of the above solutions, the chain block includes a converter, the converter includes a gear and a protective shell, an upper hook is fixedly connected to the protective shell, a load-bearing chain and an adjustment chain are connected to the gear, a lower hook is arranged at the bottom of the load-bearing chain, and the jack is connected to the lower hook.

[0016] As described above, an installation device for a jack for tensioning the steel bundle of the tooth block of the box girder bottom plate of the present invention has the following beneficial effects:

[0017] 1. The structure of the present invention is simple. The guide rope and the anchor plate are connected by wedges. When installing, the jack is used to tighten it, and when removing, the anchor releasing device is used to remove it. It can be reused and has strong economy.

[0018] 2. The present invention uses an anchoring assembly to fix the device at the position of the embedded hole. A wedge is provided on the base to prevent the anchor plate from shifting, and a reversing rod is provided at the bottom of the positioning pipe to prevent the guide rope from being worn. The positioning pipe extends into the base, and the structure has strong stability and high safety.

[0019] 3. The moving component of the present utility model adopts double wheels, is provided with a connecting plate and side plates, and end plates and restraint plates are arranged to connect the two side plates, with relatively strong stability. At the same time, it can prevent the moving part from detaching from the guide rope, and has relatively high safety.

[0020] 4. In the present utility model, the jack can move forward, backward, upward and downward, making the installation efficiency of the jack high. Description of the Drawings

[0021] Figure 1 It shows the front view of the present utility model.

[0022] Figure 2 It shows the side view of the present utility model.

[0023] Figure 3 It shows the front view of the guide rope in the present utility model.

[0024] Figure 4 It shows the side view of the guide rope in the present utility model.

[0025] Figure 5 It shows the front view of the anchoring component in the present utility model.

[0026] Figure 6 It shows the side view of the anchoring component in the present utility model.

[0027] Figure 7 It shows the front view of the embedded pipe in the present utility model.

[0028] Figure 8 It shows the side view of the embedded pipe in the present utility model.

[0029] Figure 9 It shows the front view of the moving component in the present utility model.

[0030] Figure 10 It shows the side view of the moving component in the present utility model.

[0031] Figure 11 It shows the front view of the chain block in the present utility model.

[0032] Figure 12 It shows the side view of the chain block in the present utility model.

[0033] Description of Component Labels

[0034] 1 - Guide rope; 2 - Anchoring assembly; 21 - Anchor plate; 22 - Wedge; 23 - Base; 24 - Positioning tube; 25 - Reversing rod; 3 - Embedded tube; 4 - Moving assembly; 41 - Traveling wheel; 42 - Rotating shaft; 43 - Bearing; 44 - Connecting plate; 45 - End plate; 46 - Restraining plate; 47 - Side plate; 48 - Pin shaft; 49 - Hook; 5 - Chain block; 51 - Upper hook; 52 - Converter; 53 - Load-bearing chain; 54 - Adjusting chain; 55 - Lower hook; 6 - Jack; 7 - Strand; 8 - Working anchor plate; 9 - Tooth block; 10 - Box girder top plate. Detailed implementation manners

[0035] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0036] Please refer to Figures 1 to 12 Note that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have any technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0037] Please refer to Figures 1-12 , the present utility model provides an installation device for a jack for tensioning the steel strand of the tooth block on the bottom plate of a box girder, which includes two embedded tubes 3. The two embedded tubes 3 are arranged on the box girder top plate 10. A guide rope 1 is connected between the two embedded tubes 3. Both ends of the guide rope 1 are fixed by an anchoring assembly 2. A moving assembly 4 that can move horizontally along the length direction of the guide rope 1 is arranged on the horizontal section of the guide rope 1. A chain block 5 is connected to the moving assembly 4, and a jack 6 is connected to the chain block 5.

[0038] When this embodiment is used, in order to solve the technical problems in the prior art that the tensioning of the tooth block steel strand usually uses a steel rod inserted into the tie rod hole of the box girder web and then a manual hoist is used for the installation of the jack, with low installation efficiency, high safety risks, large consumption of human resources, and high requirements for the height of the tie rod hole, this embodiment proposes a device for installing a jack for tensioning the tooth block steel strand at the bottom plate of the box girder. This device is fixed on the top plate 10 of the box girder and includes a guide rope 1, an anchoring component 2, a pre-buried pipe 3, a moving component 4, and a manual hoist 5. When the box girder segment is constructed to the previous segment before the start of the ground tooth block 9 and the subsequent segment after the end of the tooth block 9, the pre-buried pipe 3 is buried at the position corresponding to the top plate of the steel strand of the tooth block 9. According to the actual position between the two pre-buried pipes 3, the length of the guide rope 1 is cut. One end of the guide rope 1 is inserted into the moving component 4 and then both ends are passed out from the position of the pre-buried hole. Then the anchoring component 2 is installed to fix the guide rope 1. Finally, the manual hoist 5 is connected to the moving component 4, and the moving component 4 is connected to the jack 6. Through the cooperation of the moving component 4 and the manual hoist 5, the front-back and up-down movement of the jack 6 can be realized, saving labor, improving construction efficiency and reducing safety risks at the same time.

[0039] In this embodiment, the guide rope 1 is a steel strand, and the pre-buried pipe 3 is a PVC pipe.

[0040] As a further description of the above embodiment, the anchoring component 2 includes a base 23, the base 23 is fixed on the top plate 10 of the box girder, an anchor plate 21 is fixedly connected above the base 23, and a positioning pipe 24 is fixedly connected below the base 23. Circular limiting grooves are respectively arranged at the centers of the top and bottom of the base 23. The anchor plate 21 is located in the circular limiting groove, and after the positioning pipe 24 extends into the circular limiting groove, it is welded to the base 23.

[0041] When this embodiment is used, circular limiting grooves are opened at the centers of the top and bottom of the base 23. The anchor plate 21 is located in the circular limiting hole. After the positioning pipe 24 extends into the circular limiting groove and is welded to the base 23, the contact surfaces between the anchor plate 21 and the positioning pipe 24 and the base 23 can be increased, thereby ensuring the stability of the connection between the anchor plate 21 and the positioning pipe 24 and the base 23, and further ensuring the stability of the anchoring component 2 and improving safety.

[0042] In this embodiment, both the anchor plate 21 and the base 23 are made into a cylindrical shape by using high-strength steel through a mold, and the top is subjected to arc treatment.

[0043] As a further description of the above embodiment, a clamping groove is arranged at the center of the top of the anchor plate 21, and both ends of the guide rope 1 are fixed with clamping pieces 22 after passing through the anchor plate 21.

[0044] When this embodiment is in use, both ends of the guide rope 1 pass through the positioning tube 24, the base 23, and the anchor plate 21 and then pass through the position of the embedded hole. Then, a single-pull jack is used to tightly press the clamping piece 22, thereby fixing the guide rope 1, preventing the anchor plate 21 from shifting, and increasing the fixing stability of the guide rope 1. When disassembling, the clamping piece 22 can be removed by using an anchor retractor, and it can be reused, with strong economy.

[0045] In this embodiment, the clamping piece 22 is made of high-strength steel through a mold.

[0046] As a further description of the above embodiment, a reversing rod 25 is welded to the bottom of the positioning tube 24, and a trapezoidal notch is formed at the bottom of the positioning tube 24 in the direction perpendicular to the length of the reversing rod 25.

[0047] When this embodiment is in use, the guide rope 1 bypasses the reversing rod 25 and then exits from the trapezoidal notch at the bottom of the positioning tube 24. The setting of the reversing rod 25 can reduce the friction between the guide rope 1 and the positioning tube 24, prevent the guide rope 1 from being worn, and extend the service life of the guide rope 1.

[0048] As a further description of the above embodiment, the moving assembly 4 includes two walking wheels 41. The two walking wheels 41 are connected to a connecting plate 44. The manual hoist 5 is connected to the connecting plate 44. Trapezoidal grooves corresponding to the cross-sectional width of the guide rope 1 are formed on the surfaces of the two walking wheels 41. The walking wheels 41 are placed on the guide rope 1 through the trapezoidal grooves and can move along the length direction of the guide rope 1.

[0049] When this embodiment is in use, trapezoidal grooves corresponding to the cross-sectional width of the guide rope 1 are formed on the surface of the walking wheel 41, which is convenient for placing the walking wheel 41 on the guide rope 1 and moving along the length direction of the guide rope 1, thereby facilitating the horizontal movement of the jack 6.

[0050] As a further description of the above embodiment, two bearings 43 are fixedly connected to the middle of the connecting plate 44. The centers of the two bearings 43 are on the same horizontal line. A rotating shaft 42 is fixedly connected inside the bearing 43. The other end of the rotating shaft 42 is fixedly connected to the center of the walking wheel 41.

[0051] When this embodiment is in use, the connecting plate 44 is formed by cutting and grinding a steel plate, and two connecting holes are cut on the same plane at the center along its length direction. The size of the connecting holes is the same as the outer diameter of the bearing 43. The outer ring is placed into the connecting holes and welded.

[0052] In this embodiment, a rotating shaft hole is formed at the center of the walking wheel 41. The rotating shaft 42 passes through the rotating shaft hole and is welded to the rotating shaft hole. The other end of the rotating shaft 42 passes through the inner ring of the bearing 43 and is welded.

[0053] As a further description of the above embodiment, side plates 47 are welded to both sides of the connecting plate 44, end plates 45 are welded between the two side plates 47, and a constraint plate 46 is also welded between the two side plates 47. The constraint plate 46 is disposed below the traveling wheels 41.

[0054] During the use of this embodiment, the side plates 47, end plates 45 and the constraint plate 46 are cut from steel plates. The side plates 47 are welded to the connecting plate 44, the end plates 45 are welded between the two ends of the two side plates 47, and rectangular holes are cut at the corresponding positions of the end plates 45 for the traveling wheels 41 to connect the guide ropes 1. The constraint plate 46 is welded between the two side plates 47 and the two end plates 45 and is located below the traveling wheels 41.

[0055] In this embodiment, the moving assembly 4 uses double wheels, is provided with a connecting plate 44 and side plates 47, and end plates 45 and a constraint plate 46 are provided to connect the two side plates 47, which has strong stability. At the same time, it can prevent the moving member 4 from detaching from the guide rope 1, and has high safety.

[0056] As a further description of the above embodiment, pin holes are symmetrically opened at the centers of the two end plates 45, a pin 48 is fixedly connected between the two pin holes, a hook 49 is fixedly connected to the middle of the pin 48, and the chain block 5 is connected to the moving assembly 4 through the hook 49.

[0057] During the use of this embodiment, the pin 48 passes through the hook 49 and is fixed in the pin holes on the two side plates 47, and then the two ends of the pin 48 are upset.

[0058] As a further description of the above embodiment, the chain block 5 includes a converter 52. The converter 52 includes a gear and a protective shell. An upper hook 51 is fixedly connected to the protective shell. A load-bearing chain 53 and an adjustment chain 54 are connected to the gear. A lower hook 55 is disposed at the bottom of the load-bearing chain 53, and the jack 6 is connected to the lower hook 55.

[0059] During the use of this embodiment, the chain block 5 is composed of an upper hook 51, a converter 52, a load-bearing chain 53, an adjustment chain 54 and a lower hook 55. The upper hook 51 is bolted to the converter 52. The converter 52 is composed of a gear and a protective shell. The load-bearing chain 53 and the adjustment chain 54 are respectively connected to the gear in the converter 52, and a lower hook 55 is disposed at the bottom of the load-bearing chain 53. The up and down movement of the jack 6 is realized through the chain block 5.

[0060] In summary, the specific use method of the installation device for the steel strand tensioning jack of the box girder bottom plate tooth block is as follows:

[0061] After the device arrives at the site, the device is inspected and accepted to check whether each weld is full. After there are no quality defects in each part, the installation of this device is carried out as follows.

[0062] In the previous segment starting from the tooth block 9 and the subsequent segment ending at the tooth block 9, pre-embedded pipes 3 are provided on the box girder top plate 10 corresponding to the steel strand positions of the tooth block 9. The pre-embedded pipes 3 are made of PVC pipes and are cut to the appropriate length according to the actual on-site situation. Before the tensioning of the bottom tooth block 9, the length of the guide rope 1 is cut according to the actual distance between the two pre-embedded pipes 3. After passing the guide rope 1 through the moving assembly 4, both ends are passed out from the pre-embedded pipes 3. The anchoring assembly 2 is installed. The trapezoidal notch in the positioning pipe 24 should face the direction of the tooth block 9. The position is adjusted so that the reversing rod 25 contacts the steel strand 7. The anchor plate 21 is passed through the guide rope 1 and placed on the base 23, and then the wedge grips 22 are inserted. At both ends, the guide rope 1 is tightened simultaneously using a single-pull jack. Then, the upper hook 51 of the manual hoist 5 is hung on the hook 49, and the jack 6 is pulled to move the jack 6 back and forth along the direction of the guide rope 1 through the moving part 4. The chain 54 of the manual hoist 5 is pulled to adjust the up and down movement of the jack 6, completing the installation of this device.

[0063] Quality requirements

[0064] During the welding process, it should be ensured that each rod is horizontal and vertical, and full welding is performed at the welding parts. After welding, the welding slag is knocked off and the weld quality is inspected to ensure that the weld length, depth, width, and reinforcement height meet the requirements. During the transportation and storage of each component, do not hammer or press it heavily to prevent deformation of the connecting parts of each component, resulting in difficulties in later installation. After the above steps are completed, this device is sprayed with an anti-rust material to improve its durability.

[0065] In summary, the jack of the present utility model can move forward, backward, up, and down, making the installation efficiency of the jack higher. Therefore, the present utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0066] The above embodiments are only illustrative of the principles and effects of the present utility model and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A box beam bottom plate gear block steel strand tensioning jack installation device, characterized in that: The invention comprises two embedded pipes (3), the two embedded pipes (3) are arranged on the top plate (10) of the box beam, a guide rope (1) is connected between the two embedded pipes (3), the two ends of the guide rope (1) are fixed by anchoring components (2), a movable component (4) which can be moved horizontally along the length direction of the guide rope (1) is arranged on the horizontal section of the guide rope (1), a hand chain hoist (5) is connected to the movable component (4), and a jack (6) is connected to the hand chain hoist (5).

2. The box beam bottom plate gear block steel strand tensioning jack installation device according to claim 1 is characterized in that: The anchor assembly (2) comprises a base (23), the base (23) is fixed on the box beam top plate (10), an anchor plate (21) is fixedly connected above the base (23), and a positioning tube (24) is fixedly connected below the base (23).

3. The box beam bottom plate gear block steel strand tensioning jack installation device according to claim 2 is characterized in that: Circular limiting grooves are respectively arranged at the top and bottom centers of the base (23), the anchor plate (21) is located in the circular limiting grooves, and the positioning tube (24) is welded to the base (23) after extending into the circular limiting grooves.

4. The box beam bottom plate gear block steel strand tensioning jack installation device according to claim 2 is characterized in that: A clip groove is provided at the center of the top of the anchor plate (21), and the two ends of the guide rope (1) are fixed with clips (22) after passing through the anchor plate (21).

5. The box beam bottom plate gear block steel strand tensioning jack installation device according to claim 2 is characterized in that: A reversing rod (25) is welded to the bottom of the positioning tube (24), and a trapezoidal notch is provided at the bottom of the positioning tube (24) in a direction perpendicular to the length of the reversing rod (25).

6. The box beam bottom plate gear block steel strand tensioning jack installation device according to claim 1 is characterized in that: The moving assembly (4) comprises two running wheels (41), the two running wheels (41) are connected to a connecting plate (44), the hand chain hoist (5) is connected to the connecting plate (44), the surfaces of the two running wheels (41) are provided with a trapezoidal groove corresponding to the cross-sectional width of the guide rope (1), the running wheels (41) are placed on the guide rope (1) through the trapezoidal groove and can move along the length direction of the guide rope (1).

7. The box beam bottom plate gear block steel strand tensioning jack installation device according to claim 6 is characterized in that: Two bearings (43) are fixedly connected to the middle of the connecting plate (44), the centers of the two bearings (43) are on the same horizontal line, a rotating shaft (42) is fixedly connected inside the bearing (43), and the other end of the rotating shaft (42) is fixedly connected to the center of the walking wheel (41).

8. The box beam bottom plate gear block steel strand tensioning jack installation device according to claim 6 is characterized in that: Side plates (47) are welded on both sides of the connecting plate (44), two end plates (45) are welded between the two side plates (47), and a restraining plate (46) is also welded between the two side plates (47), and the restraining plate (46) is arranged below the walking wheel (41).

9. The box beam bottom plate gear block steel strand tensioning jack installation device according to claim 8, characterized in that: Pin holes are symmetrically formed at the centers of the two end plates (45), a pin (48) is fixedly connected between the two pin holes, a hook (49) is fixedly connected to the middle of the pin (48), and the hand chain hoist (5) is connected to the moving component (4) via the hook (49).

10. The box beam bottom plate gear block steel strand tensioning jack installation device according to claim 1, characterized in that: The hand chain hoist (5) includes a converter (52), and the converter (52) includes a gear and a protective shell. An upper hook (51) is fixedly connected to the protective shell. A load-bearing chain (53) and an adjustment chain (54) are connected to the gear. A lower hook (55) is arranged at the bottom of the load-bearing chain (53), and the jack (6) is connected to the lower hook (55).

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