CN215549670U

CN215549670U - Tensioning device for prestressed concrete member

Info

Publication number: CN215549670U
Application number: CN202121825327.4U
Authority: CN
Inventors: 王丹涛; 张彦鹏; 丁自华; 殷鹏; 宇欢平; 马乐猛
Original assignee: China Railway First Engineering Group Co Ltd; Construction and Installation Engineering Co Ltd of China Railway First Engineering Group Co Ltd
Current assignee: China Railway First Engineering Group Co Ltd; Construction and Installation Engineering Co Ltd of China Railway First Engineering Group Co Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-18
Anticipated expiration: 2031-08-05

Abstract

The utility model provides a tensioning device for a prestressed concrete member. A tensioning device for prestressed concrete components, comprising: a base; the concave seat is fixedly arranged at the top of the base; the two first hydraulic cylinders are fixedly arranged on the top inner wall and the bottom inner wall of the concave seat respectively; the two connecting plates are respectively and fixedly arranged on output shafts of the first hydraulic cylinders; the four concave pressing plates are fixedly arranged on the two connecting plates; the two hydraulic jacks are respectively arranged on two sides of the concave seat; and the two positioning anchors are respectively arranged on two sides of the concave seat. The tensioning device for the prestressed concrete member provided by the utility model has the advantages that the tensioning work can be simultaneously performed on the steel strands on two sides of the prefabricated member, and the tensioning efficiency is higher.

Description

Tensioning device for prestressed concrete member

Technical Field

The utility model relates to the technical field of prestressed tensioning, in particular to a tensioning device for a prestressed concrete member.

Background

Prestressing force stretch-draw is exactly to add pulling force in advance in the component, make to be exerted prestressing force stretch-draw component and bear compressive stress, and then make it produce certain deformation, the load that deals with structure itself and receive, load including component self weight, wind load, snow load, earthquake load effect etc, steel strand wires are used in general stretch-draw, the jack, the anchor slab, the clamping piece, it is fixed well with pressing from both sides a partial steel strand wires that the ground tackle will expose the component earlier usually when using, then insert hydraulic jack, later on utilize the ground tackle to support hydraulic jack, then start hydraulic jack and carry out stretch-draw work.

However, this kind of stretch-draw mode is comparatively traditional, and can only stretch-draw one side steel strand wires to the prefab once, and stretch-draw efficiency is lower to when stretch-draw the prefab at every turn, still need expend longer time and put the prefab to positive middle position, just can carry out effectual stretch-draw work, efficiency further reduces.

Therefore, it is necessary to provide a tension device for prestressed concrete members to solve the above-mentioned technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tensioning device for a prestressed concrete member, which can simultaneously perform tensioning work on steel strands on two sides of a prefabricated member and has higher tensioning efficiency.

In order to solve the above technical problems, the present invention provides a tension device for prestressed concrete members, comprising: a base; the concave seat is fixedly arranged at the top of the base; the two first hydraulic cylinders are fixedly arranged on the top inner wall and the bottom inner wall of the concave seat respectively; the two connecting plates are respectively and fixedly arranged on output shafts of the first hydraulic cylinders; the four concave pressing plates are fixedly arranged on the two connecting plates; the two hydraulic jacks are respectively arranged on two sides of the concave seat; the two positioning anchors are respectively arranged on two sides of the concave seat, and are arranged between the two hydraulic jacks; and the two fastening anchors are respectively arranged on one sides of the two hydraulic jacks which are far away from each other.

Preferably, the top of the base is fixedly provided with two second hydraulic cylinders, the output shafts of the two hydraulic cylinders are fixedly provided with ejection columns, and the top ends of the ejection columns are fixedly provided with first supporting sheets.

Preferably, the top of the base is fixedly provided with two supporting rods, the top ends of the two supporting rods are fixedly provided with a second supporting sheet, and the second supporting sheet is matched with the hydraulic jack.

Preferably, four supporting legs distributed in a rectangular array are fixedly installed at the bottom of the base.

Preferably, a top plate is fixedly mounted on the concave seat, two hydraulic cylinders III are fixedly mounted at the top of the top plate, output shafts of the hydraulic cylinders III penetrate through the top plate and are movably connected with the top plate, bearing plates are fixedly mounted on the output shafts of the hydraulic cylinders III, straightening rods are slidably mounted on the bearing plates, and a push plate is fixedly mounted at one end, close to each other, of each straightening rod.

Preferably, the end, far away from each other, of each of the two straightening rods is fixedly provided with a fixed connection plate, one side, close to each other, of each of the two bearing plates is fixedly provided with a hydraulic cylinder four, an output shaft of each hydraulic cylinder four penetrates through the bearing plates and is movably connected with the bearing plates, and output shafts of the two hydraulic cylinders four are fixedly connected with the two fixed connection plates respectively.

Compared with the prior art, the tensioning device for the prestressed concrete member provided by the utility model has the following beneficial effects:

the utility model provides a tensioning device for a prestressed concrete member, which can simultaneously perform tensioning work on steel strands on two sides of a prefabricated member through two groups of tensioning parts, thereby greatly improving the tensioning efficiency;

and before carrying out the stretch-draw work, the output shaft that starts pneumatic cylinder three stretches out, will correct the pole and take to the lowest position, then start the output shaft withdrawal of two pneumatic cylinders four, alright make two push pedals be close to each other, after two push pedals all contact the steel strand wires of prefab both sides, just put the prefab placed in the middle well, later alright carry out subsequent stretch-draw work, through this kind of correction mode, need not to consume more time and carry out the location placed in the middle to the prefab, when save time, further improved stretch-draw efficiency.

Drawings

Fig. 1 is a schematic front view of a first embodiment of a tension apparatus for prestressed concrete members according to the present invention;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

fig. 3 is a schematic front view of a second embodiment of a tension apparatus for a prestressed concrete structure according to the present invention.

Reference numbers in the figures: 1. a base; 2. a concave seat; 3. a first hydraulic cylinder; 4. a connecting plate; 5. a concave pressure plate; 6. A hydraulic jack; 7. positioning an anchorage device; 8. fastening an anchorage device; 9. a second hydraulic cylinder; 10. a top pillar; 11. a first support sheet; 12. a second support sheet; 13. a top plate; 14. a hydraulic cylinder III; 15. a carrier plate; 16. a leveling rod; 17. pushing the plate; 18. fixing and connecting the plates; 19. and a fourth hydraulic cylinder.

Detailed Description

The utility model is further described with reference to the following figures and embodiments.

First embodiment

Referring to fig. 1 to 2 in combination, in a first embodiment of the present invention, a tension apparatus for a prestressed concrete structure includes: a base 1; the concave seat 2 is fixedly arranged at the top of the base 1; the two hydraulic cylinders I3 are respectively and fixedly arranged on the inner wall of the top part and the inner wall of the bottom part of the concave seat 2, and the prefabricated part can be reliably clamped by matching the hydraulic cylinders I3 with the concave pressing plate 5; the two connecting plates 4 are respectively and fixedly arranged on output shafts of the two hydraulic cylinders I3; the four concave pressing plates 5 are all fixedly arranged on the two connecting plates 4; the two hydraulic jacks 6 are respectively arranged at two sides of the concave base 2; the two positioning anchors 7 are respectively arranged on two sides of the concave seat 2, and the two positioning anchors 7 are arranged between the two hydraulic jacks 6; two fastening ground tackle 8, two fastening ground tackle 8 sets up respectively two hydraulic jack 6 one side of keeping away from each other, through hydraulic jack 6, location ground tackle 7 and fastening ground tackle 8's cooperation, alright realize the stretch-draw work of steel strand wires.

The top fixed mounting of base 1 has two pneumatic cylinders two 9, two equal fixed mounting has a fore-set 10, two on the output shaft of pneumatic cylinder two 9 the equal fixed mounting in top of fore-set 10 has backing sheet one 11, and backing sheet one 11 can form the support to the steel strand wires to can prevent to a certain extent that the steel strand wires from taking place to warp.

The top fixed mounting of base 1 has two bracing pieces, two the equal fixed mounting in top of bracing piece has backing sheet two 12, backing sheet two 12 with hydraulic jack 6 looks adaptation, backing sheet two 12 can be supported the hydraulic jack 6 that the quality is heavier, further prevent that the steel strand wires from being held in the palm to warping by gravity.

The bottom fixed mounting of base 1 has four supporting legss that are rectangular array and distribute, and four array distribution's supporting legs can be with this device reliable and stable support, and the bottom of supporting legs is equipped with the slipmat, further improves stability.

The working principle of the tensioning device for the prestressed concrete member provided by the utility model is as follows:

when the device is used, the prefabricated part is placed on the two concave pressing plates 5 below, then the output shafts of the two hydraulic cylinders I3 are started to extend, so that the prefabricated part can be reliably clamped, then the two positioning anchors 7 are fixed on the steel stranded wires on the two sides of the prefabricated part, the positioning anchors 7 need to be in contact with the connecting plate 4, then the two hydraulic jacks 6 are inserted into the steel stranded wires on the two sides of the prefabricated part and are in contact with the positioning anchors 7, after the device is installed, the two hydraulic jacks 6 are respectively in contact with the two supporting sheets II 12 to support the device, then the two fastening anchors 8 are respectively fixed on the steel stranded wires on the two sides of the prefabricated part, then the output shafts of the two hydraulic cylinders II 9 are started to extend, the steel stranded wires on the two sides of the prefabricated part are supported, then the hydraulic jacks 6 can be started to stretch the steel stranded wires, and after stretching is finished, the positioning anchors 7, The hydraulic jack 6 and the fastening anchorage device 8 are taken down.

through two sets of stretch-draw spare parts that set up, alright carry out stretch-draw work to the both sides steel strand wires of prefab simultaneously to improvement stretch-draw efficiency that can be very big, and during stretch-draw, through the support of backing sheet one 11 and backing sheet two 12, can prevent effectively that steel strand wires from being too big because of gravity, leading to steel strand wires to appear warping crooked condition, stretch-draw process is smooth and stable.

Second embodiment:

based on the tensioning device for the prestressed concrete member provided in the first embodiment of the present application, a second embodiment of the present application proposes another tensioning device for a prestressed concrete member. The second embodiment is merely a preferred way of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.

The second embodiment of the present invention will be further described with reference to the drawings and the following description.

Referring to fig. 3 in combination, the tensioning device for the prestressed concrete member further includes a top plate 13, the top plate 13 is fixedly installed on the concave seat 2, two hydraulic cylinders three 14 are fixedly installed at the top of the top plate 13, the hydraulic cylinders three 14 can bring a push plate 17 to a specified height position, output shafts of the hydraulic cylinders three 14 penetrate through the top plate 13 and are movably connected with the top plate 13, bearing plates 15 are fixedly installed on output shafts of the two hydraulic cylinders three 14, a correcting rod 16 is slidably installed on the bearing plates 15, the push plate 17 is fixedly installed at one end, close to each other, of the two correcting rods 16, and the push plate 17 can be aligned with the axis of the steel strand, so that the prefabricated member can be pushed to a centered position.

The end, far away from each other, of each of the two straightening rods 16 is fixedly provided with a fixing plate 18, one side, close to each other, of each of the two bearing plates 15 is fixedly provided with a hydraulic cylinder four 19, an output shaft of each of the hydraulic cylinders four 19 penetrates through the bearing plates 15 and is movably connected with the bearing plates 15, output shafts of the two hydraulic cylinders four 19 are fixedly connected with the two fixing plates 18, the straightening rods 16 can be fixed by the fixing plates 18, so that when the output shafts of the hydraulic cylinders four 19 are stretched, the pushing plates 17 can be driven to horizontally move, and the arrangement of the hydraulic cylinders four 19 can enable the pushing plates 17 to horizontally move, so that the prefabricated part can be pushed to the middle position.

In the present embodiment, the output shaft of the hydraulic cylinder four 19 is in an extended state in the initial state;

when the prefabricated member is subjected to tensioning work, the prefabricated member is placed on the two concave pressing plates 5 below, then the output shaft of the hydraulic cylinder III 14 is started to extend out, the correcting rod 16 is brought to the lowest position, then the output shafts of the two hydraulic cylinders IV 19 are started to retract, the two pushing plates 17 can be made to be close to each other, the prefabricated member is placed in the middle until the two pushing plates 17 are all in contact with the steel strands on the two sides of the prefabricated member, then the steps are operated in the reverse direction, subsequent tensioning work can be performed, through the correcting mode, the prefabricated member is not required to be positioned in the middle in a long time, and the tensioning efficiency is further improved while time is saved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. Prestressing force is tensioning equipment for concrete member, its characterized in that includes:

a base;

the concave seat is fixedly arranged at the top of the base;

the two first hydraulic cylinders are fixedly arranged on the top inner wall and the bottom inner wall of the concave seat respectively;

the two connecting plates are respectively and fixedly arranged on output shafts of the first hydraulic cylinders;

the four concave pressing plates are fixedly arranged on the two connecting plates;

the two hydraulic jacks are respectively arranged on two sides of the concave seat;

the two positioning anchors are respectively arranged on two sides of the concave seat, and are arranged between the two hydraulic jacks;

and the two fastening anchors are respectively arranged on one sides of the two hydraulic jacks which are far away from each other.

2. A tensioning device for the prestressed concrete member according to claim 1, wherein two second hydraulic cylinders are fixedly mounted at the top of the base, jack posts are fixedly mounted on output shafts of the two second hydraulic cylinders, and supporting pieces I are fixedly mounted at the top ends of the two jack posts.

3. A tensioning device for the prestressed concrete members according to claim 1, wherein two supporting rods are fixedly mounted at the top of the base, supporting pieces II are fixedly mounted at the top ends of the two supporting rods, and the supporting pieces II are matched with the hydraulic jacks.

4. A tensioning device for prestressed concrete structures according to claim 1, characterized in that four supporting feet are fixedly mounted on the bottom of the base, said supporting feet being distributed in a rectangular array.

5. A tensioning device for prestressed concrete members according to claim 1, wherein a top plate is fixedly mounted on the concave seat, two hydraulic cylinders III are fixedly mounted on the top of the top plate, output shafts of the hydraulic cylinders III penetrate through the top plate and are movably connected with the top plate, bearing plates are fixedly mounted on output shafts of the two hydraulic cylinders III, correcting rods are slidably mounted on the bearing plates, and a push plate is fixedly mounted at one end, close to each other, of each of the two correcting rods.

6. A tensioning device for prestressed concrete members according to claim 5, wherein a fixing plate is fixedly mounted at each end of the two straightening rods which are far away from each other, a hydraulic cylinder IV is fixedly mounted at each side of the two bearing plates which are close to each other, an output shaft of the hydraulic cylinder IV penetrates through the bearing plates and is movably connected with the bearing plates, and output shafts of the two hydraulic cylinders IV are fixedly connected with the two fixing plates respectively.