Photovoltaic anchorage device tensioning jack

Abstract

The utility model discloses a tensioning jack for a photovoltaic anchorage device. The tensioning jack comprises a jacking device and a tensioning jack body. A jacking piston rod of the jacking device is propped against the large end of the working clamping piece; a front tool clamping piece is arranged at the rear end of a jacking oil cylinder of the jacking device, and a front buffer spring is arranged at the large end of the front tool clamping piece; a tensioning compression nut is arranged at the front end of a tensioning oil cylinder of the tensioning jack; through holes are formed in the center of the jacking piston rod and the center of a tensioning piston of the tensioning jack; the tail end of the tensioning piston props against the front part of the tool anchor plate; the rear end of the tool anchor plate is in threaded connection with the spring gland; the large end of the rear tool clamping piece is connected with a rear steel strand guide sleeve, and the rear steel strand guide sleeve is sleeved with a rear buffer spring. The problems that in the prior art, the appearance is large and cumbersome, tensioning operation is not convenient enough, threads of a working clamping piece are prone to being damaged or gaps between the threads are filled with impurities, the anchoring performance of a photovoltaic anchorage device is affected, and a steel strand slips can be solved.

Description

Technical Field

[0001] This utility model relates to the field of prestressed construction technology, and in particular to a jack for tensioning photovoltaic anchors in prestressed construction. Background Technology

[0002] Flexible photovoltaic anchorages are widely used in distributed photovoltaic power generation projects and large-scale ground-mounted photovoltaic power stations. However, insufficient prestress can lead to slippage of the anchorage, significantly reducing its reliability. Furthermore, the clamp anchor has high requirements for tensioning load and tensioning process. The prestress within the flexible photovoltaic support cable structure is relatively low, and after tensioning, it is impossible to apply pressure to the clamps, resulting in incomplete engagement between the clamps and the steel strands. This leads to frequent slippage of the clamp anchor. Existing technology uses a single-hole front-clamping jack for direct tensioning, which has the following problems: 1. It is made of ordinary materials, making it heavy and inconvenient to operate. Flexible photovoltaic anchorage construction often takes place in complex terrains such as mountains and fishponds, making its use extremely inconvenient. 2. The jack lacks a pressure device at the front end, failing to press the working clamps, which can easily cause uneven clamping and steel strand slippage. 3. For photovoltaic anchorages, the jacks need to be repeatedly tilted and extended several times to tension the anchorage to the design stress. However, each tilting and extension can only be achieved by the working clamps holding the steel strands together to transfer the force. This requires the working clamps to work repeatedly, which can easily cause damage to the threads of the working clamps or fill the gaps with impurities, thus affecting the anchoring performance of the photovoltaic anchorage and causing problems such as slippage of the steel strands. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a photovoltaic anchor tensioning jack, which can solve the problems of existing photovoltaic anchor tensioning jacks being large and heavy, not easy to operate, and lacking a top pressure device at the front end of the jack, which does not have the function of pressing the working clamp plate. This can easily cause damage to the threads of the working clamp plate or the gaps of the threads to be filled with impurities, thereby affecting the anchoring performance of the photovoltaic anchor and causing the steel strand to slip.

[0004] To solve the above problems, the technical solution of this utility model is as follows: This photovoltaic anchor tensioning jack includes a front-end pressure device and a rear-end tensioning jack; the pressure device includes a pressure cylinder and a pressure piston rod installed in the pressure cylinder; the front end of the pressure piston rod abuts against the large end of the working clamp plate installed in the working anchor plate; a pressure sealing plug is provided at the front of the pressure cylinder, a front tool clamp is provided at the rear end of the pressure cylinder body, and a front buffer spring is provided at the large end of the front tool clamp; a pressure cylinder return port and a pressure cylinder inlet are respectively connected at the pressure cylinder positions before and after the piston of the pressure piston rod; a through hole for the steel strand to pass through is provided at the center of the pressure piston rod;

[0005] The tensioning jack includes a tensioning cylinder and a tensioning piston; a tensioning sealing plug is provided at the front of the tensioning cylinder; a tensioning clamping nut is provided at the front end of the tensioning cylinder; a tensioning cylinder oil inlet is connected to the front section of the tensioning cylinder at the inner end of the tensioning sealing plug, and a tensioning cylinder oil return port is connected to the rear section of the tensioning cylinder; a through hole for the steel strand to pass through is provided at the center of the tensioning piston, and a tensioning mandrel sleeve is fitted into the through hole; one end of the tensioning mandrel sleeve abuts against the front tool clamp, and the other end abuts against the small end of the rear tool clamp installed in the tool anchor plate; the end of the tensioning piston abuts against the front of the tool anchor plate; the rear end of the tool anchor plate is threadedly connected to a spring cover; a rear steel strand guide sleeve extending out of the spring cover is connected to the large end of the rear tool clamp, and a rear buffer spring is fitted on the rear steel strand guide sleeve, with the spring cover pressing the rear buffer spring into the tool anchor plate.

[0006] A more specific embodiment of the above technical solution is as follows: the working clamp is fitted inside the working anchor plate, the working anchor plate is fixed on the limiting nut, and the limiting nut is threadedly connected to the front end of the top pressure cylinder.

[0007] Furthermore, the rear end of the top pressure cylinder body is connected to the tensioning nut via a connecting flange.

[0008] Furthermore, the front tool clamp and the rear tool clamp have the same specifications and model.

[0009] Furthermore, the front buffer spring and the rear buffer spring have the same specifications and model.

[0010] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0011] 1. Compact size and lightweight. Featuring a lightweight design and made of aluminum alloy, it is 2 / 3 lighter than similar jacks, making tensioning operation easier.

[0012] 2. The jacking device at the front end of the jack has the function of pressing the working clamp, which effectively reduces the loss of tension stress and prevents problems such as slippage of the steel strand caused by uneven working clamp.

[0013] 3. The jack is equipped with two sets of tool clamps. When tensioning, the front and rear tool clamps are subjected to force alternately until the design force value is reached. Then, the front jacking device presses down on the working clamp, releasing the tension and allowing the working clamp to bear the force. This effectively avoids the repeated stress on the working clamp, which may affect the anchoring performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] The labels in the diagram are as follows:

[0016] 1. Working anchor plate; 2. Working clamp; 3. Top pressure piston rod; 4. Top pressure cylinder return port; 5. Top pressure cylinder inlet; 6. Top pressure cylinder; 7. Front tool clamp; 8. Tensioning cylinder; 9. Tensioning piston; 10. Tensioning cylinder inlet; 11. Tensioning cylinder return port; 12. Tool anchor plate; 13. Rear tool clamp; 14. Rear steel strand guide sleeve; 15. Spring cover; 16. Rear buffer spring; 17. Tensioning through sleeve; 18. Tensioning sealing plug; 19. Front steel strand guide sleeve; 20. Tensioning clamping nut; 21. Connecting flange; 22. Front buffer spring; 23. Top pressure sealing plug; 24. Limit nut; 25. Steel strand. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 The photovoltaic anchor tensioning jack includes a front-end jacking device and a rear-end tensioning jack. The jacking device includes a jacking cylinder 6 and a jacking piston rod 3 installed in the jacking cylinder 6. The front end of the jacking piston rod 3 abuts against the large end of the working clamp 2 installed in the working anchor plate 1. The working anchor plate 1 is fixed on the limiting nut 24, and the limiting nut 24 is threadedly connected to the front end of the jacking cylinder 6. A jacking sealing plug 23 is provided at the front of the jacking cylinder 6, and a front tool clamp 7 is provided at the rear end of the jacking cylinder body. A front buffer spring 22 is provided at the large end of the front tool clamp 7. The rear end of the jacking cylinder body is connected to the tensioning nut 20 through a connecting flange 21. A jacking cylinder return port 4 and a jacking cylinder inlet 5 are respectively connected at the jacking cylinder 6 positions before and after the piston of the jacking piston rod 3. A through hole for the steel strand 25 to pass through is provided in the center of the jacking piston rod 3.

[0019] The tensioning jack includes a tensioning cylinder 8 and a tensioning piston 9; a tensioning sealing plug 18 is provided at the front of the tensioning cylinder 8; a tensioning clamping nut 20 is provided at the front end of the tensioning cylinder 8; a tensioning cylinder oil inlet 10 is connected to the front section of the tensioning cylinder 8 at the inner end of the tensioning sealing plug 18, and a tensioning cylinder oil return port 11 is connected to the rear section of the tensioning cylinder 8; a through hole is provided in the center of the tensioning piston 9 to allow the steel strand 25 to pass through, and a tensioning mandrel sleeve 17 is fitted into the through hole for tensioning mandrel... One end of the core sleeve 17 abuts against the front tool clamp 7, and the other end abuts against the small end of the rear tool clamp 13 installed in the tool anchor plate 12; the end of the tensioning piston 9 abuts against the front of the tool anchor plate 12; the rear end of the tool anchor plate 12 is threadedly connected to the spring cover 15; the large end of the rear tool clamp 13 is connected to the rear steel strand guide sleeve 14 that extends out of the spring cover 15, and the rear steel strand guide sleeve 14 is fitted with a rear buffer spring 16, and the spring cover 15 presses the rear buffer spring 16 into the tool anchor plate 12.

[0020] The front tool clamp 7 and the rear tool clamp 13 have the same specifications and model. The front buffer spring 22 and the rear buffer spring 16 have the same specifications and model.

[0021] The basic working principle of this utility model is as follows: When the photovoltaic anchor needs to be tensioned, the oil pump supplies oil to the tensioning cylinder, the tensioning piston extends, and drives the rear tool clamp to tension the steel strand. When one stroke is completed, the tensioning piston returns, and the front tool clamp holds the steel strand. This process is repeated, and the steel strand is repeatedly clamped and tensioned by the alternating force of the front and rear tool clamps until the design force value is reached. When the design force value is reached, the oil pump holds the load, the top pressure cylinder enters the oil, and drives the top pressure piston rod to press the working clamp. After pressing to a certain force value, the tensioning piston starts to return, completing one tensioning cycle.

[0022] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A photovoltaic anchor tensioning jack, characterized in that: It includes a top pressure device and a tensioning jack; the top pressure device includes a top pressure cylinder (6) and a top pressure piston rod (3); the front end of the top pressure piston rod (3) abuts against the large end of the working clamp (2); the front part of the top pressure cylinder (6) is provided with a top pressure sealing plug (23), the rear end of the cylinder body of the top pressure cylinder (6) is provided with a front tool clamp (7), and the large end of the front tool clamp (7) is provided with a front buffer spring (22); the top pressure cylinder (6) is connected to the top pressure cylinder return port (4) and the top pressure cylinder inlet port (5); the center of the top pressure piston rod (3) is provided with a through hole; The tensioning jack includes a tensioning cylinder (8) and a tensioning piston (9); a tensioning sealing plug (18) is provided at the front of the tensioning cylinder (8); a tensioning clamping nut (20) is provided at the front end of the tensioning cylinder (8); a tensioning cylinder inlet (10) is connected to the front section of the tensioning cylinder (8), and a tensioning cylinder return port (11) is connected to the rear section of the tensioning cylinder (8); a through hole is provided in the center of the tensioning piston (9), and a tensioning mandrel sleeve (17) is fitted into the through hole; the tensioning mandrel sleeve (17) is... One end of the tool clamp (7) is pressed against the front tool clamp (7), and the other end is pressed against the small end of the rear tool clamp (13); the end of the tensioning piston (9) is pressed against the front of the tool anchor plate (12); the rear end of the tool anchor plate (12) is threadedly connected to the spring cover (15); the large end of the rear tool clamp (13) is connected to the rear steel strand guide sleeve (14), and the rear steel strand guide sleeve (14) is fitted with a rear buffer spring (16), and the spring cover (15) presses the rear buffer spring (16) into the tool anchor plate (12).

2. The photovoltaic anchor tensioning jack according to claim 1, characterized in that: The working clamp (2) is fitted inside the working anchor plate (1), the working anchor plate (1) is fixed on the limiting nut (24), and the limiting nut (24) is threadedly connected to the front end of the top pressure cylinder (6).

3. The photovoltaic anchor tensioning jack according to claim 1 or 2, characterized in that: The rear end of the top pressure cylinder (6) is connected to the tensioning nut (20) via a connecting flange (21).

4. The photovoltaic anchor tensioning jack according to claim 3, characterized in that: The front tool clip (7) and the rear tool clip (13) have the same specifications and model.

5. The photovoltaic anchor tensioning jack according to claim 4, characterized in that: The front buffer spring (22) and the rear buffer spring (16) have the same specifications and model.

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