Jack special for photovoltaic anchorage device

Abstract

The invention discloses a special jack for a photovoltaic anchorage device. The special jack comprises a jacking device and a tensioning jack, 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; 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 jack can solve the problems that an existing jack special for the photovoltaic anchorage device is large in size, heavy and not convenient enough in tensioning operation, a jacking device is not arranged at the front end of the jack, a working clamping piece jacking function does not exist, threads of the working clamping piece are prone to being damaged or tooth gaps are filled with impurities, and therefore the anchoring performance of the photovoltaic anchorage device is affected; and the steel strand is prevented from slipping off.

Description

Technical Field

[0001] The invention relates to the technical field of prestressed construction, in particular to a jack used for tensioning a photovoltaic anchor in prestressed construction. Background Art

[0002] Flexible support photovoltaic anchors are widely used in distributed photovoltaic power generation projects, large-scale ground photovoltaic power stations and other fields. However, when the prestress is insufficient, the photovoltaic anchor may slip, and its reliability is significantly reduced. In addition, the clip anchor has high requirements for the tensioning load and tensioning process. The prestressing force in the photovoltaic flexible support cable structure is relatively low, and the clip cannot be pressed after tensioning, so that the clip and the steel strand cannot be fully engaged, resulting in frequent slippage of the clip anchor. The existing technology uses a single-hole front-card jack for direct tensioning, which has the following problems: 1. It is made of ordinary materials, which is relatively heavy and not easy to operate. The construction conditions of flexible support photovoltaic anchors are mostly in complex terrains such as mountains and fish ponds, which are extremely inconvenient to use. 2. There is no top pressure device at the front end of the jack, and there is no function of pressing the working clip. This can easily cause the working clip to follow unevenly, causing the steel strand to slip. 3. Photovoltaic anchors are generally tensioned, and the jack needs to be repeatedly inverted and stretched and tensioned for several strokes before it can be tensioned to the design stress. However, each inversion can only achieve force conversion by clamping the steel strands with force through the working clips. In this way, the working clips need to work repeatedly, which can easily cause the working clip threads to be damaged or the gaps between the threads to be filled with impurities, thereby affecting the anchoring performance of the photovoltaic anchor and causing problems such as the steel strands to slip. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a special jack for photovoltaic anchors, which can solve the problems of existing special jacks for photovoltaic anchors, such as large size, heavy weight, not easy tensioning operation, no top pressure device at the front end of the jack, and no top pressure function for the working clip, which easily causes the working clip screw threads to be damaged or the tooth gaps to be filled with impurities, thereby affecting the anchoring performance of the photovoltaic anchor and causing the steel strand to slip.

[0004] In order to solve the above problems, the technical solution of the present invention is: this kind of photovoltaic anchor special jack includes a pusher and a tensioning jack; the pusher includes a push cylinder and a push piston rod; the front end of the push piston rod abuts against the large end of the working clip; the front part of the push cylinder is provided with a push sealing plug, the rear end of the push cylinder body is provided with a front tool clip, and the large end of the front tool clip is provided with a front buffer spring; the push cylinder is connected to a push cylinder return oil port and a push cylinder oil inlet which are respectively connected to the oil pump; the center of the push piston rod is provided with a through hole.

[0005] The cam is provided with an oil pump, and the cam is provided with an oil pumping station, and the cam is provided with an oil pumping station. The cam is provided with an oil pumping station, and the cam is provided with an oil pumping station. The cam is provided with an oil pumping station, and the cam is provided with an oil pumping station. A rear buffer spring is provided, and the spring pressure cover presses the rear buffer spring into the tool anchor plate; when the photovoltaic anchor is tensioned, the oil pump supplies oil to the tensioning cylinder through the oil inlet of the tensioning cylinder, and the tensioning piston extends to drive the rear tool clamp to tension the steel hinge wire. When a stroke is completed, the tensioning piston returns, and the front tool clamp clamps the steel hinge wire, and this movement is repeated. The front tool clamp and the rear tool clamp are alternately subjected to force, and the steel hinge wire is repeatedly clamped and tensioned. After tensioning to the designed force value, the oil pump holds the load, and the pressing cylinder supplies oil through the oil inlet of the pressing cylinder, driving the pressing piston rod to press the working clamp. After pressing to the set force value, the tensioning piston starts to return, completing one tensioning.

[0006] In the above technical solution, a more specific solution is: the working clip is sleeved in 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 and tightening nut through a connecting flange.

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

[0009] Furthermore: the front buffer spring and the rear buffer spring have the same specifications and models.

[0010] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art: 1. Small size and light weight. It adopts lightweight design and is made of aluminum alloy. It is 2 / 3 lighter than similar jacks and is easy to operate during tensioning.

[0011] 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 the steel hinge wire from slipping due to uneven following of the working clamp.

[0012] 3. The jack is equipped with two pairs of tool clips. When tensioning, the front and rear tool clips are alternately stressed until the tension reaches the designed force value. The front end presser presses the working clip and releases the tension to make the working clip stressed. This effectively avoids the repeated stress on the working clip affecting the anchoring performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] The numbers in the figure represent: 1. Working anchor plate, 2. Working clamp, 3. Pressing piston rod, 4. Oil return port of pressing cylinder, 5. Oil inlet of pressing cylinder, 6. Pressing cylinder, 7. Front tool clamp, 8. Tensioning cylinder, 9. Tensioning piston, 10. Oil inlet of tensioning cylinder, 11. Oil return port of tensioning cylinder, 12. Tool anchor plate, 13. Rear tool clamp, 14. Rear steel strand guide sleeve, 15. Spring pressure cover, 16. Rear buffer spring, 17. Tensioning feedthrough sleeve, 18. Tensioning sealing plug, 19. Front steel strand guide sleeve, 20. Tensioning clamping nut, 21. Connecting flange, 22. Front buffer spring, 23. Pressing sealing plug, 24. Limit nut, 25. Steel strand. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 A special jack for photovoltaic anchorage includes a front-end jack and a rear-end tensioning jack. The jack 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 clip 2 installed in the working anchor plate 1, and the working anchor plate 1 is fixed on the limiting nut 24, which 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, a front tool clip 7 is provided at the rear end of the jacking cylinder 6 body, and a front buffer spring 22 is provided at the large end of the front tool clip 7; the rear end of the jacking cylinder 6 body is connected to the tensioning and tightening nut 20 through a connecting flange 21; the jacking cylinder 6 positions before and after the piston of the jacking piston rod 3 are connected with a jacking cylinder oil return port 4 and a jacking cylinder oil inlet 5 respectively; a through hole for the steel strand 25 to pass through is provided in the center of the jacking piston rod 3.

[0016] The tensioning jack includes a tensioning oil cylinder 8 and a tensioning piston 9; a tensioning sealing plug 18 is provided at the front of the tensioning oil cylinder 8; a tensioning pressing nut 20 is provided at the front end of the tensioning oil cylinder 8; the front section of the tensioning oil cylinder 8 at the inner end of the tensioning sealing plug 18 is connected with a tensioning cylinder oil inlet 10, and the rear section of the tensioning oil cylinder 8 is connected with a tensioning cylinder oil return port 11; a through hole is provided in the center of the tensioning piston 9 for allowing the steel strand 25 to pass through, and the through hole is provided with a tensioning through-hole sleeve 17, and the tensioning through-hole sleeve One end of the core sleeve 17 presses against the front tool clamp 7, and the other end presses against the small end of the rear tool clamp 13 installed in the tool anchor plate 12; the end of the tensioning piston 9 presses against the front of the tool anchor plate 12; the rear end of the tool anchor plate 12 is threadedly connected to the spring pressure cover 15; the large end of the rear tool clamp 13 is connected to the rear steel strand guide sleeve 14 extending out of the spring pressure cover 15, and the rear steel strand guide sleeve 14 is sleeved with a rear buffer spring 16, and the spring pressure cover 15 presses the rear buffer spring 16 into the tool anchor plate 12.

[0017] The specifications and models of the front tool clip 7 and the rear tool clip 13 are identical. The specifications and models of the front buffer spring 22 and the rear buffer spring 16 are identical.

[0018] Before the photovoltaic anchor is tensioned, the steel strand 25 passes through the working clamp 2, the pressing piston rod 3, the front tool clamp 7, the tensioning through-hole sleeve 17 and the rear tool clamp 13 in the working anchor plate 1.

[0019] The basic working principle of the present invention is: 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 hinge wire. When a stroke is completed and the tensioning piston returns, the front tool clamp clamps the steel hinge wire, and this process is repeated. The front and rear tool clamps are alternately subjected to force, and the steel hinge wire is repeatedly clamped and tensioned until the design force value is reached. When the design force value is reached, the oil pump holds the load, and the pressing cylinder supplies oil, driving the pressing piston rod to press the working clamp. After the pressing reaches a set force value, the tensioning piston starts to return, completing one tensioning operation.

[0020] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

Claims

1. A special jack for photovoltaic anchors, characterized by: It comprises a jacking device and a tensioning jack; the jacking device comprises a jacking oil cylinder (6) and a jacking piston rod (3); the front end of the jacking piston rod (3) abuts against the large end of the working clamp (2); a jacking sealing plug (23) is provided at the front of the jacking oil cylinder (6), a front tool clamp (7) is provided at the rear end of the cylinder body of the jacking oil cylinder (6), and a front buffer spring (22) is provided at the large end of the front tool clamp (7); the jacking oil cylinder (6) is connected to a jacking cylinder oil return port (4) and a jacking cylinder oil inlet port (5) which are respectively connected to an oil pump; The tensioning jack comprises a tensioning oil cylinder (8) and a tensioning piston (9); a tensioning sealing plug (18) is provided at the front of the tensioning oil cylinder (8); a tensioning clamping nut (20) is provided at the front end of the tensioning oil cylinder (8); a tensioning cylinder oil inlet (10) is connected to the front section of the tensioning oil cylinder (8), and a tensioning cylinder oil return port (11) is connected to the rear section of the tensioning oil cylinder (8); the tensioning cylinder oil inlet (10) and the tensioning cylinder oil return port (11) are respectively connected to an oil pump; a tensioning through-hole sleeve (17) is sleeved on the center of the tensioning piston (9). One end of the tensioning through-hole sleeve (17) presses against the front tool clip (7), and the other end presses against the small end of the rear tool clip (13); the end of the tensioning piston (9) presses against the front of the tool anchor plate (12); the rear end of the tool anchor plate (12) is connected to the spring pressure cover (15); the large end of the rear tool clip (13) is connected to the rear steel strand guide sleeve (14), and the rear steel strand guide sleeve (14) is sleeved with a rear buffer spring (16), and the spring pressure cover (15) presses the rear buffer spring (16) into the tool anchor plate (12); When the photovoltaic anchor is tensioned, the oil pump supplies oil to the tensioning cylinder (8) through the tensioning cylinder oil inlet (10), and the tensioning piston (9) extends to drive the rear tool clamp (13) to tension the steel hinge (25). When a stroke is completed and the tensioning piston (9) returns, the front tool clamp (7) clamps the steel hinge (25). This process is repeated, and the front tool clamp (7) and the rear tool clamp (13) are alternately stressed to repeatedly clamp and tension the steel hinge (25). After tensioning to the designed force value, the oil pump holds the load, and the pressing cylinder (6) is supplied with oil through the pressing cylinder oil inlet (5), driving the pressing piston rod (3) to press the working clamp (2). After the pressing reaches the set force value, the tensioning piston (9) starts to return, completing one tensioning operation.

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

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

4. The photovoltaic anchor jack according to claim 3, characterized in that: The front tool clamp 7 and the rear tool clamp 13 have the same specifications and models.

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

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