Jacking device applied to prestressed tensioning jack in limited space

Abstract

The utility model discloses a jacking device applied to a prestressed tensioning jack in a limited space, which is applied to the field of bridge construction, and is characterized in that the jack is temporarily fixed on a top plate through a pressing plate, the jack can be conveyed to a required position at any time according to the operation condition, and the jack can be conveniently lifted in the actual construction process. An included angle exists between the position of the anchor bearing plate and the vertical direction, and when the jack is installed, the end of the jack is adjusted to be parallel to the anchor bearing plate through the angle adjusting mechanism, so that the jack can be attached to the anchor bearing plate conveniently, the requirement of tensioning construction is met, the operation time of prestress tensioning is shortened, and the physical strength of operators is saved; according to the mode that the crank is rotated to enable the bidirectional lead screw to drive the sliding block to move, the sliding block moves to drive the transmission rod to enable the sliding rod to drive the pressing plates to move, and the distance between the pressing plates is changed, the purpose of being suitable for jacks of different sizes can be achieved, the use cost is reduced, and practicability and applicability are improved.

Description

Technical Field

[0001] The utility model relates to the field of bridge construction, in particular to a jacking device applied to a prestressed tensioning jack in a confined space. Background Art

[0002] At present, a Chinese utility model with the announcement number CN211421883U discloses a prestressed tensioning jack lifting device, including a prestressed jack, a base, a slewing bearing arranged on the base, and an auxiliary jack arranged on the slewing bearing, wherein the prestressed jack is placed on the slewing bearing, and the output end of the auxiliary jack is connected to the prestressed jack. The purpose of the utility model is to provide a prestressed tensioning jack lifting device to solve the problems of low efficiency and great safety hazards in the process of installing prestressed jacks at pre-buried hanging points in prestressed corridors in the prior art, and the inability to install the jacks when the prestressed anchor plates are installed incorrectly, so as to achieve the purpose of reducing safety hazards, improving efficiency, and being able to install even when the installation angle of the prestressed anchor plates does not correspond to the jack hanging points.

[0003] The existing jacking device is not convenient to use. During the construction of prestressed bridges, various workplaces with limited space will be encountered, especially the prestressed construction of the top plate in the bridge box chamber. The prestressed tensioning jacks are heavy, the space in the box chamber is small, it is inconvenient to set up lifting brackets, and it is not suitable for jacks of different sizes. Generally, the fixing device of the jacking device is fixed in size and can only fix jacks of a specific size. If jacks of different sizes need to be fixed, the jacking device needs to be replaced, which increases the cost of use and reduces practicality and applicability. In order to solve the above-mentioned problems, we propose a jacking device for prestressed tensioning jacks in confined spaces. Utility Model Content

[0004] The utility model aims to provide a lifting device applied to a prestressed tensioning jack in a confined space, which has the advantages of being easy to use and suitable for jacks of different sizes.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a jacking device for prestressed tensioning jacks in confined spaces, comprising a base plate, a lifting plate is arranged on the top of the base plate, a telescopic frame is hinged between the lifting plate and the base plate, and one end of the top and bottom of the telescopic rod is slidably connected to the bottom of the lifting plate and the top of the base plate respectively, a hydraulic telescopic cylinder is hinged between the telescopic frame and the base plate, a slide plate is slidably connected to the inner wall of the lifting plate, a screw is threadedly connected to the inner wall of the slide plate, and both ends of the screw are The upper and lower ends of the sliding plates are respectively connected to the upper and lower surfaces of the lifting plates, the lower and upper surfaces of the lifting ...

[0006] By adopting the above technical scheme, the jack is temporarily fixed on the top plate by the clamping plate. According to the working conditions, the jack can be transported to the required position at any time. In the actual construction process, there is an angle between the position of the anchor plate and the vertical direction. When installing the jack, the angle adjustment mechanism is used to adjust the top of the jack to a parallel angle with the anchor plate, so as to facilitate the fit between the jack and the anchor plate and meet the requirements of the tensioning construction. It will reduce the operation time of the prestressed tensioning and save the physical strength of the operator. By turning the crank, the rotation of the crank drives the rotation of the bidirectional screw rod, the rotation of the bidirectional screw rod drives the movement of the sliding block, the movement of the sliding block drives the movement of the transmission rod, the movement of the transmission rod drives the movement of the sliding rod, and the movement of the sliding rod drives the movement of the clamping plate, so that the distance between the clamping plates can be changed, which can achieve the purpose of adapting jacks of different sizes, reduce the cost of use, and improve practicality and applicability.

[0007] The utility model is further configured as follows: both ends of the slide plate are bolted with a first slide block, the surface of the first slide block is slidably connected with a first slide groove, and the first slide groove is opened on the inner wall of the lifting plate.

[0008] By adopting the above technical solution, the first sliding block and the first sliding groove are provided to prevent the sliding plate from deflecting and ensure stability.

[0009] The utility model is further configured as follows: both ends of the slide rod are bolted with a second slide block, the surface of the second slide block is slidably connected with a second slide groove, and the second slide groove is opened on the inner wall of the top plate.

[0010] By adopting the above technical solution, the second sliding block and the second sliding groove are provided to prevent the sliding rod from deflecting and ensure stability.

[0011] The utility model is further configured as follows: one end of the screw rod is bolted with a protective shell, and the motor is located inside the protective shell.

[0012] By adopting the above technical solution, the motor is protected by providing a protective shell.

[0013] The utility model is further configured as follows: one end of the bidirectional screw rod is bolted with a crank.

[0014] By adopting the above technical solution, a crank is provided to facilitate the rotation of the bidirectional screw rod, thereby facilitating fixation and adjustment.

[0015] The utility model is further configured as follows: a rubber pad is bonded to the surface of the pressing plate.

[0016] By adopting the above technical solution, the jack can be prevented from being damaged by arranging a rubber pad.

[0017] The utility model is further configured as follows: a universal wheel is bolted to the bottom of the base plate.

[0018] By adopting the above technical solution and arranging universal wheels, the device can be easily moved.

[0019] The utility model is further configured as follows: a push handle is bolted to the top of the bottom plate.

[0020] By adopting the above technical solution and providing a push handle, the device can be easily moved.

[0021] In summary, the utility model has the following beneficial effects:

[0022] 1. The utility model temporarily fixes the jack on the top plate through the pressing plate. According to the working conditions, the jack can be transported to the required position at any time. In the actual construction process, there is an angle between the anchor plate and the vertical direction. When installing the jack, the angle adjustment mechanism is used to adjust the top of the jack to an angle parallel to the anchor plate, which is conducive to the fitting of the jack and the anchor plate, meeting the requirements of the tensioning construction, reducing the operation time of the prestressing tensioning, and saving the physical strength of the operator;

[0023] 2. The utility model rotates the crank handle, which drives the bidirectional screw to rotate, which drives the sliding block to move, which drives the transmission rod to move, which drives the slide bar to move, which drives the clamping plate to move, so that the distance between the clamping plates is changed. This can achieve the purpose of being suitable for jacks of different sizes, reduce the cost of use, and improve practicality and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the structure of the utility model;

[0025] Figure 2It is a cross-sectional view of the structure of the utility model;

[0026] Figure 3 It is a top view cross-sectional view of the lifting plate structure of the utility model;

[0027] Figure 4 It is a top view cross-sectional view of the top plate structure of the utility model.

[0028] 1. Bottom plate; 2. Lifting plate; 3. Telescopic frame; 4. Hydraulic telescopic cylinder; 5. Slide plate; 6. Screw rod; 7. Motor; 8. Support rod; 9. Top plate; 10. Baffle plate; 11. Bidirectional screw rod; 12. Sliding block; 13. Transmission rod; 14. Sliding rod; 15. Pressing plate; 16. First slider; 17. First slide groove; 18. Second slider; 19. Second slide groove; 20. Protective shell; 21. Crank handle; 22. Rubber pad; 23. Universal wheel; 24. Push handle. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] Embodiment 1:

[0031] refer to Figure 1 , Figure 2 and Figure 3 A lifting device for a prestressed tensioning jack in a confined space comprises a bottom plate 1, a lifting plate 2 is arranged on the top of the bottom plate 1, a telescopic frame 3 is hinged between the lifting plate 2 and the bottom plate 1, and one end of the top and bottom of the telescopic rod are respectively slidably connected to the bottom of the lifting plate 2 and the top of the bottom plate 1, a hydraulic telescopic cylinder 4 is hinged between the telescopic frame 3 and the bottom plate 1, a slide plate 5 is slidably connected to the inner wall of the lifting plate 2, a screw rod 6 is threadedly connected to the inner wall of the slide plate 5, and both ends of the screw rod 6 are rotatably sleeved with the inner wall of the lifting plate 2, a motor 7 is bolted to one end of the screw rod 6, and the motor 7 is bolted to the surface of the lifting plate 2, A support rod 8 is hinged on the top of the slide plate 5, and a top plate 9 is hinged on the top of the support rod 8, and one end of the top plate 9 is hinged to the top of the lifting plate 2. The jack is temporarily fixed on the top plate 9 by the clamping plate 15. The jack can be transported to the required position at any time according to the working conditions. During the actual construction process, there is an angle between the position of the anchor plate and the vertical direction. When installing the jack, the angle adjustment mechanism is used to adjust the top of the jack to a parallel angle with the anchor plate, so as to facilitate the fitting of the jack and the anchor plate, meet the requirements of the tensioning construction, reduce the operation time of prestressing, and save the physical strength of the operator.

[0032] refer to Figure 3 Both ends of the slide plate 5 are bolted with a first slider 16, the surface of the first slider 16 is slidably connected with a first slide groove 17, and the first slide groove 17 is opened on the inner wall of the lifting plate 2. By setting the first slider 16 and the first slide groove 17, the slide plate 5 is prevented from deflecting and stability is ensured.

[0033] refer to Figure 3 One end of the screw rod 6 is bolted with a protective shell 20, and the motor 7 is located inside the protective shell 20. By providing the protective shell 20, the motor 7 is protected.

[0034] refer to Figure 1 and Figure 2 The bottom of the base plate 1 is bolted with a universal wheel 23, and the universal wheel 23 is provided to facilitate the movement of the device.

[0035] refer to Figure 1 and Figure 2 A push handle 24 is bolted to the top of the bottom plate 1, and the push handle 24 is provided to facilitate the movement of the device.

[0036] Embodiment 2:

[0037] refer to Figure 1 and Figure 4 A baffle 10 is bolted to the surface of the top plate 9, and a two-way screw rod 11 is rotatably sleeved on the inner wall of the top plate 9. A sliding block 12 is threadedly connected to the surface of the two-way screw rod 11, and a transmission rod 13 is hinged on the surface of the sliding block 12. The other end of the transmission rod 13 is hinged on the sliding rod 14, and a clamping plate 15 is bolted to the surface of the sliding rod 14. By rotating the crank 21, the rotation of the crank 21 drives the two-way screw rod 11 to rotate, the rotation of the two-way screw rod 11 drives the sliding block 12 to move, the movement of the sliding block 12 drives the transmission rod 13 to move, the movement of the transmission rod 13 drives the sliding rod 14 to move, and the movement of the sliding rod 14 drives the clamping plate 15 to move, so that the distance between the clamping plates 15 is changed, which can achieve the purpose of being suitable for jacks of different sizes, reduce the cost of use, and improve practicality and applicability.

[0038] refer to Figure 4 Both ends of the slide bar 14 are bolted with a second slider 18, the surface of the second slider 18 is slidably connected with a second slide groove 19, and the second slide groove 19 is opened on the inner wall of the top plate 9. By arranging the second slider 18 and the second slide groove 19, the slide bar 14 is prevented from deflecting and stability is ensured.

[0039] refer to Figure 1 , Figure 2 and Figure 4 One end of the bidirectional screw rod 11 is bolted with a crank 21. By setting the crank 21, it is easy to rotate the bidirectional screw rod 11, which is convenient for fixing and adjusting.

[0040] refer to Figure 1 A rubber pad 22 is bonded to the surface of the clamping plate 15. The rubber pad 22 is provided to prevent damage to the jack.

[0041] The use process is briefly described as follows: the clamping plate 15 temporarily fixes the jack on the top plate 9. According to the working conditions, the jack can be transported to the required position at any time. In the actual construction process, there is an angle between the position of the anchor plate and the vertical direction. When installing the jack, the motor 7 drives the screw rod 6 to rotate, the screw 6 rotates to drive the slide plate 5 to move, the slide plate 5 moves to drive the support rod 8 to move, and the support rod 8 moves to change the angle of the top plate 9, so that the top of the jack is adjusted to an angle parallel to the anchor plate, so as to facilitate the fitting of the jack and the anchor plate, meet the requirements of tensioning construction, and the device is compact and convenient, and easy to use; turn the crank 21, the crank 21 rotates to drive the two-way screw rod 11 to rotate, the two-way screw rod 11 rotates to drive the sliding block 12 to move, the sliding block 12 moves to drive the transmission rod 13 to move, the transmission rod 13 moves to drive the sliding rod 14 to move, and the sliding rod 14 moves to drive the clamping plate 15 to move, so that the distance between the clamping plates 15 can be changed to achieve the purpose of applying jacks of different sizes.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A lifting device for a prestressed tensioning jack in a confined space, comprising a base plate (1), characterized in that: A lifting plate (2) is arranged on the top of the base plate (1), a telescopic frame (3) is hingedly connected between the lifting plate (2) and the base plate (1), and one end of the top and bottom of the telescopic rod are slidably connected to the bottom of the lifting plate (2) and the top of the base plate (1) respectively, a hydraulic telescopic cylinder (4) is hingedly connected between the telescopic frame (3) and the base plate (1), a slide plate (5) is slidably connected to the inner wall of the lifting plate (2), a screw rod (6) is threadedly connected to the inner wall of the slide plate (5), and both ends of the screw rod (6) are rotatably sleeved with the inner wall of the lifting plate (2), one end of the screw rod (6) is bolted to a motor (7), and the motor (7) is connected to the lifting plate The top of the slide plate (5) is hinged with a support rod (8), the top of the support rod (8) is hinged with a top plate (9), and one end of the top plate (9) is hinged with the top of the lifting plate (2), the surface of the top plate (9) is bolted with a baffle (10), the inner wall of the top plate (9) is rotatably sleeved with a bidirectional screw rod (11), the surface of the bidirectional screw rod (11) is threadedly connected with a sliding block (12), the surface of the sliding block (12) is hinged with a transmission rod (13), the other end of the transmission rod (13) is hinged with a sliding rod (14), and the surface of the sliding rod (14) is bolted with a clamping plate (15).

2. The jacking device for prestressed tensioning jacks in confined spaces according to claim 1 is characterized in that: Both ends of the slide plate (5) are bolted with a first slide block (16), the surface of the first slide block (16) is slidably connected with a first slide groove (17), and the first slide groove (17) is opened on the inner wall of the lifting plate (2).

3. The jacking device for prestressed tensioning jacks in confined spaces according to claim 1 is characterized in that: Both ends of the slide rod (14) are bolted with a second slide block (18), the surface of the second slide block (18) is slidably connected with a second slide groove (19), and the second slide groove (19) is opened on the inner wall of the top plate (9).

4. The jacking device for prestressed tensioning jacks in confined spaces according to claim 1 is characterized in that: One end of the screw rod (6) is bolted to a protective shell (20), and the motor (7) is located inside the protective shell (20).

5. The jacking device for prestressed tensioning jacks in confined spaces according to claim 1, characterized in that: One end of the bidirectional screw rod (11) is bolted with a crank (21).

6. The jacking device for prestressed tensioning jacks in confined spaces according to claim 1, characterized in that: A rubber pad (22) is bonded to the surface of the pressing plate (15).

7. The jacking device for prestressed tensioning jacks in confined spaces according to claim 1, characterized in that: A universal wheel (23) is bolted to the bottom of the base plate (1).

8. The jacking device for prestressed tensioning jacks in confined spaces according to claim 1, characterized in that: A push handle (24) is bolted to the top of the base plate (1).

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