Prestress tensioning device suitable for precast beam field

Abstract

The prestress tensioning device comprises a bottom frame, a top frame and I-shaped steel, the two sides of the top of the bottom frame are fixedly connected with the top frame through a supporting frame, the I-shaped steel is fixed to the middle of the bottom of the top frame, and the I-shaped steel is in transmission connection with an electric hoist through a hand-push sports car. A front clamping type jack is hoisted on the electric hoist through a steel wire guide wheel, a tensioning oil pump in transmission connection with the front clamping type jack is installed on the rear portion of the bottom frame, and the hand-push trolley is controlled by an externally-matched remote controller. According to the device, the efficiency of prestress tensioning operation in a beam field can be improved, and the accuracy of prestress tensioning and the safety of prestress operation are improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a prestressing tensioning device suitable for use in precast beam yards. Background Technology

[0002] Currently, in the prefabrication process of T-beams and box girders in bridges, tension force needs to be applied to the steel strands within the beams. With continuous optimization of structural systems, the number of prestressed steel strands within the beams is decreasing while the prestress value is increasing, placing increasingly higher demands on the tensioning jacks. Traditional beam yard tensioning uses ordinary jacks, employing simple reaction frames and hand-operated hoists for lifting. This method is inconvenient for workers and carries certain risks. Now, with jacks becoming increasingly larger, the requirements for prestressing tensioning are becoming increasingly stringent. Utility Model Content

[0003] The purpose of this invention is to provide a prestressed tensioning device suitable for use in precast beam yards, in order to solve the problems encountered in the background art.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A prestressed tensioning device suitable for use in precast beam yards includes a base frame, a top frame, and an I-beam. The top two sides of the base frame are fixedly connected to the top frame via support frames. The I-beam is fixed at the bottom center of the top frame. The I-beam is driven by an electric hoist via a hand-pushed trolley. The electric hoist is equipped with a front clamp jack via a wire guide wheel. A tensioning oil pump connected to the front clamp jack is installed at the rear of the base frame. The hand-pushed trolley is controlled by an external remote control.

[0006] In the above solution, anchor bolts are installed at the four ends of the bottom of the base frame, and the support height of the anchor bolts is adjusted according to the flatness of the ground. Furthermore, traction wheels are also installed at the four ends of the bottom of the base frame, and the traction wheels are located inside the anchor bolts. The traction wheels are self-locking swivel wheels.

[0007] In the above scheme, the base frame is welded from steel plates, and a partition is welded to the top of the base frame. Additionally, a baffle is fixed between the two support frames, and the bottom of the baffle is welded and fixed to the partition.

[0008] As a preferred embodiment, the support frame and the bottom sides of the base frame are fixed with tie rods, and the bottom of the top frame and the top sides of the base frame are fixed with support rods.

[0009] Compared with existing technologies, the beneficial effects of this invention are as follows: the I-beam is connected to an electric hoist via a hand-pushed trolley, using the electric hoist for jacking and moving, reducing manual operation and ensuring personnel safety. The hand-pushed trolley allows for the connection and directional movement of heavy objects to the equipment on the I-beam. This device can improve the efficiency of prestressing tensioning operations in beam yards, increase the accuracy of prestressing tensioning, and enhance the safety of prestressing operations. Attached Figure Description

[0010] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 for Figure 1 A structural diagram from another perspective;

[0013] Figure 3 This is a side view of the structure of this utility model;

[0014] Figure 4 This is a schematic diagram of the base frame structure of this utility model;

[0015] Figure 5 This is a schematic diagram of the top frame and bottom frame structure in this utility model;

[0016] Numbered in the diagram: 1-Base frame; 11-Support frame; 12-Anchor bolt; 13-Traction wheel; 14-Baffle; 15-Partition plate; 2-Top frame; 21-Tie bar; 22-Support bar; 3-Electric hoist; 4-Front clamp jack; 5-I-beam; 51-Hand-push trolley; 6-Tensioning oil pump. Detailed Implementation

[0017] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the utility model will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model, and therefore only show the relevant components of this utility model.

[0018] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 and Figure 2 As shown, a prestressed tensioning device suitable for use in precast beam yards includes a base frame 1, a top frame 2, and I-beams 5. The base frame 1 and top frame 2 constitute the entire supporting frame. Both the base frame 1 and top frame 2 are welded from steel plates. A partition plate 15 is welded to the top of the base frame 1 to maintain the flatness of the installation surface. The I-beams 5 are used as the main structural material of the prestressed tensioning frame, serving as a conveyor track in this design, and possess advantages such as high rigidity and high bending strength.

[0021] The top two sides of the base frame 1 are fixedly connected to the top frame 2 via support frames 11. I-beams 5 are fixed in the middle of the bottom of the top frame 2 to facilitate the movement of the electric hoist 3. To improve the stability of the frame, tie rods 21 are fixed at the bottom two sides of the support frames 11 and the base frame 1, and support rods 22 are fixed at the bottom of the top frame 2 and the top two sides of the base frame 1. The tie rods 21 and support rods 22 form a triangular fixation on the frame, making the entire frame structure more solid and stable.

[0022] The I-beam 5 is connected to the electric hoist 3 via a hand-operated trolley 51. The electric hoist 3 is used for jacking and moving, reducing manual operation and ensuring personnel safety. The hand-operated trolley 51 can connect heavy objects to the equipment on the I-beam 5 and move them in a directional manner. The hand-operated trolley 51 is controlled by an external remote control and can move left, right, forward, and backward. Its structure is common in overhead cranes in current workshops.

[0023] The top of the hand-pushed trolley 51 is generally equipped with two rollers, and at least three hand-pushed trolleys 51 are provided in this device. The bottoms of two hand-pushed trolleys 51 are connected to the top of the I-beam 5, and the tops are connected to the transverse top frame 2, for realizing forward and backward horizontal movement. The top of the third hand-pushed trolley 51 is connected to the I-beam 5, and the bottom is fixed to the electric hoist 3, for realizing forward and backward horizontal movement.

[0024] The electric hoist 3 is equipped with a front-clamping jack 4 via a wire guide wheel. The front-clamping jack is mainly used for single-hole tensioning, but can also be used for multi-hole pre-tensioning, tensioning, and obstacle removal. It is suitable for high-strength steel wire bundles and steel strands of various specifications and sizes. Compared with the traditional through-hole jack, the front-clamping jack in this design can save on steel strand losses.

[0025] The rear of the base frame 1 is equipped with a tensioning oil pump 6 that is connected to the front clamp jack 4. The tensioning oil pump is a special equipment used to provide tensioning power to the prestressing jack during prestressing tensioning. It can realize one-button prestressing tensioning operation, improve tensioning accuracy and reduce manual labor.

[0026] Anchor bolts 12 are installed at the four ends of the bottom of the base frame 1. The support height of the anchor bolts 12 is adjusted according to the flatness of the ground. The anchor bolts 12 can stabilize the entire frame and prevent the frame from shaking during operation.

[0027] The base frame 1 is equipped with traction wheels 13 at its four ends, enabling the entire device to move while bearing weight. The traction wheels 13 are located inside the anchor bolts 12 and are self-locking casters. This device uses a movable frame, reducing the need for a gantry crane and increasing work efficiency.

[0028] A baffle 14 is welded and fixed between the two support frames 11. The bottom of the baffle 14 is welded and fixed to the partition 15. The baffle 14 can block the impact of the broken wedges during the prestressing tensioning process, avoid injury to personnel during operation, and also protect the safety of the tensioning oil pump 6.

[0029] The purpose of this invention is to address the problem of prestressing tensioning of steel strands in concrete beams within a precast beam yard by providing a mobile prestressing tensioning device. This device can improve the efficiency, accuracy, and safety of prestressing tensioning operations within the beam yard.

[0030] During on-site operation, the prestressed tensioning device frame is moved along the beam yard work platform. Upon reaching the designated work point, the anchor bolts 12 are lowered to ensure frame stability. After the workers install the anchors and clamps onto the beam, the electric hoist 3 is used to lift the front clamp jack 4 and thread the steel strands through the tool anchor in the jack. The control panel of the tensioning oil pump 6 is opened, the work beam number and work time are set, and then "start prestressing tensioning" is clicked. After the prestressing tensioning is completed, the front clamp jack 4 is manually pulled out from the steel strands, and the electric hoist 3 is used to lift the front clamp jack 4 to the tensioning position of another bundle of steel strands on the beam. The steel strands are then threaded through the tool anchor in the front clamp jack 4 again. When all the steel strand bundles in the beam are tensioned, the electric hoist 3 is used to place the front clamp jack 4 on the frame platform, the anchor bolts 12 are raised, and the prestressed tensioning frame is moved to the next work area for further operation.

[0031] It is important to note that the prestressing tensioning sequence of the entire beam must be carried out in accordance with the design drawings, and no violations are permitted.

[0032] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A prestressing tensioning device suitable for use in precast beam yards, characterized in that: Including the chassis (1), roof (2), I-beam (5), the top of the chassis (1) both sides are fixedly connected with roof (2) through support frame (11), the I-beam (5) is fixed in the bottom of roof (2) middle, I-beam (5) is drivenly connected with electric hoist (3) through hand-push trolley (51), electric hoist (3) is hoisted with front clamping jack (4) through wire guide pulley, the rear portion of chassis (1) is installed with tensioning oil pump (6) and is drivenly connected with front clamping jack (4), hand-push trolley (51) is controlled by the remote controller matched from outside.

2. The precast beam factory prestress tensioning device according to claim 1, characterized in that: The bottom of the chassis (1) is installed with anchor bolt (12) at four ends, and the support height of the anchor bolt (12) is adjusted according to the ground flatness.

3. The precast beam factory prestress tensioning device according to claim 2, characterized in that: The bottom of the chassis (1) is also installed with traction wheel (13) at four ends, which is located on the inner side of the anchor bolt (12), and the traction wheel (13) is a self-locking universal wheel.

4. The precast beam factory suitable for prestress tension device according to claim 1, characterized in that: The chassis (1) is welded by steel plates, and a partition plate (15) is welded on the top of the chassis (1).

5. The precast beam factory suitable for prestress tension device according to claim 4, wherein: Two support frames (11) are fixedly connected with baffle (14), and the bottom of the baffle (14) is fixedly connected with the partition plate (15).

6. The precast beam factory suitable for prestress tension device according to claim 1, characterized in that: The support frame (11) and the bottom of the chassis (1) are fixedly connected with pulling rib (21) at both sides, and the bottom of the roof (2) and the top of the chassis (1) are fixedly connected with support rib (22) at both sides.

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