Device for integrally and synchronously tensioning prestressed steel strands on fixed die table

Abstract

The utility model discloses a device for integrally and synchronously tensioning prestressed steel strands on a fixed die table, relates to the field of tensioning of prefabricated part steel strands, and aims to solve the problems that in the prior art, a plurality of steel strands cannot be completely and synchronously tensioned, the adaptability to different steel strands is poor, and the waste amount of the steel strands is large. The cross beams are all detachably connected, threading holes with different hole diameters are formed in the cross beams so as to be compatible with steel strands with different wire diameters, and the fixed cross beams are connected with the fixed die table through the adjustable fixed pedestal, so that the positions of the fixed cross beams can be adjusted according to the size of the required prestressed concrete laminated slab, and waste of the steel strands is reduced; a synchronous motor diverter valve is additionally arranged on the hydraulic control system, and all hydraulic oil cylinders are accurately controlled to stretch out and draw back synchronously and equivalently, so that complete synchronous tensioning is achieved. A safety protection net is additionally arranged on the cross beam, so that the safety in the preparation process can be improved, and the steel strands are prevented from hurting people.

Description

TECHNICAL FIELD

[0001] The utility model relates to prefabricated component steel strand tension technology field, concretely is a kind of for fixed mould platform prestressed steel strand whole synchronous tensioning device. BACKGROUND

[0002] Long line method prestressed pedestal is the common equipment of preparation prestressed concrete composite slab, and prestressed concrete composite slab standardization degree is low and four sides out beard muscle, at present, still mostly 4m×9m fixed mould platform, the two ends of mould platform length direction are placed horizontal steel beam as prestressed steel wire tensioning end and fixed end, single mould platform only produces one prestressed concrete composite slab, and it is tensioned one by one, and it needs to mark first in the tensioning process, measures prestressed steel bar elongation, for the engineering of the demand of prestressed concrete composite slab larger, only the tensioning production of prestressed concrete composite slab is time-consuming, and time cost increases;Since tensioning end and fixed end are in the two ends of mould platform, prestressed concrete composite slab will inevitably cause steel strand waste if span is small.Simultaneously, in the tensioning process, different step of multiple hydraulic cylinders can also appear, and then prestressed steel strand is broken due to uneven force, and the problem of hurting people occurs. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art, and provide a prestressed steel strand whole synchronous tensioning device for fixed mould platform, which can effectively solve the problems in the background art.

[0004] In order to achieve the above object, the utility model discloses a kind of for fixed mould platform prestressed steel strand overall synchronous tensioning device, the technical scheme that it uses is, including mould platform, there is prefabricated component mould on the mould platform, beam is installed on the mould platform, steel strand is connected between the beam by clamping piece, the mould platform has end face fixed bolt hole and side face fixed bolt hole, the beam includes adjustable fixed end beam, fixed beam and movable beam, the adjustable fixed end beam is detachably connected on the mould platform, the fixed beam is installed on the mould platform by adjustable fixed pedestal, the spacing between adjustable fixed end beam and fixed beam can be adjusted according to the span of prestressed concrete composite slab, to reduce the waste of steel strand, the movable beam is connected with the fixed beam by linear drive mechanism, control system of linear drive mechanism is installed with synchronous drive assembly;Linear drive mechanism is hydraulic oil cylinder, the hydraulic oil cylinder has multiple, multiple hydraulic oil cylinder is connected on hydraulic control system, synchronous drive assembly is synchronous motor shunt valve installed on the hydraulic control system, the same flow of multiple hydraulic oil cylinder can be made by synchronous motor shunt valve Synchronous action, ensure that its telescopic amount is consistent;Steel strand and adjustable fixed end beam, fixed beam, movable beam are all equipped with clamping piece, and steel strand can be fixed, safety protection net is installed on the beam, and safety protection net can prevent steel strand from injuring people;The bolt hole and the wire hole of different aperture of adjustable fixed end beam, fixed beam and movable beam are all set up, the wire hole position of same aperture of adjustable fixed end beam, fixed beam and movable beam corresponds, can select appropriate aperture wire hole according to the wire diameter of steel strand, and the height of adjustable fixed end beam, fixed beam and movable beam can be adjusted according to the thickness of different prestressed concrete composite slab.

[0005] As a preferred technical scheme of the utility model, the clamping piece includes first clamp, second clamp and third clamp, the first clamp connects the steel strand with the adjustable fixed end beam, the second clamp connects the steel strand with the fixed beam, and the third clamp connects the steel strand with the movable beam.

[0006] As a preferred technical scheme of the utility model, the steel strand includes main line and auxiliary line, the main line is connected with the adjustable fixed end beam and the fixed beam through the first clamp and the second clamp, one end of the auxiliary line is connected with the movable beam through the third clamp, and the other end is connected with the main line through a wire connector, the main line is a steel strand for prestressed concrete composite slab, and the auxiliary line is used for connecting the main line with the movable beam, so as to facilitate stretching and reduce the waste of steel strand.

[0007] As an optimal technical scheme of the utility model, the adjustable fixed end crossbeam includes first threading part and first fixed part, the first threading part is located above the first fixed part, the first threading part is provided with first wire through hole of different hole diameter, each row of first wire through hole has same hole diameter, a plurality of groups of first bolt holes are arranged on the first fixed part, the first bolt hole corresponds to the position of the end face fixed bolt hole of the mold table and is matched in size.

[0008] As an optimal technical scheme of the utility model, the fixed crossbeam includes second threading part and second fixed part, the second fixed part is arranged on both sides of the second threading part, the second threading part is provided with second wire through hole of different hole diameter, each row of second wire through hole has same hole diameter, and the second fixed part is provided with second bolt hole.

[0009] As an optimal technical scheme of the utility model, the adjustable fixed base includes fixed plate and connecting plate, the end face of the fixed plate is connected with the connecting plate, the fixed plate is provided with third bolt hole corresponding to the position of the side fixed bolt hole of the side face of the mold table and matched in size, and the connecting plate is provided with fourth bolt hole corresponding to the position of the second bolt hole of the fixed crossbeam and matched in size.

[0010] As an optimal technical scheme of the utility model, the fixed plate and the connecting plate are further connected with reinforcing rib, the reinforcing rib can strengthen the strength between the fixed plate and the connecting plate, and the adjustable fixed base is further provided with scale, and the elongation of the steel strand can be directly observed through the scale.

[0011] As a preferred technical scheme of the utility model, the linear drive mechanism is hydraulic oil cylinder, the hydraulic oil cylinder has a plurality of, a plurality of hydraulic oil cylinder is connected on the hydraulic control system, the hydraulic oil cylinder includes first hydraulic cylinder and second hydraulic cylinder, the hydraulic control system includes hydraulic pump station, the hydraulic pump station is connected with one -level oil pipe and one -level oil return pipe, one -level oil pipe connects the first synchronous motor shunt valve after connecting the first oil pipe and the second oil pipe of two -level oil pipe, the first oil pipe is connected with the rear end oil circuit interface of the piston of first hydraulic cylinder, the second oil pipe is connected with the rear end oil circuit interface of the piston of second hydraulic cylinder, one -level oil return pipe connects the second synchronous motor shunt valve after connecting the first oil return pipe and the second oil return pipe of two -level oil return pipe, the first oil return pipe is connected with the front end oil circuit interface of the piston of first hydraulic cylinder, the second oil return pipe is connected with the front end oil circuit interface of the piston of second hydraulic cylinder, through first synchronous motor shunt valve and second synchronous motor shunt valve can ensure that the hydraulic oil flow between first oil return pipe and second oil return pipe is exactly the same, the hydraulic oil flow in first oil pipe and second oil pipe is exactly the same, thereby ensuring that a plurality of hydraulic oil cylinder synchronous equal action.

[0012] Compared with the prior art, the utility model discloses the beneficial effects are: the utility model discloses a adjustable fixed end crossbeam is connected to the end face of mould platform, then the adjustable fixed base is connected to the fixed crossbeam, and the linear drive mechanism is connected to the movable crossbeam of fixed crossbeam, not only can drive movable crossbeam through linear drive mechanism, and realize the synchronous drive of all linear drive mechanisms by combining synchronous drive assembly, thereby realize the synchronous equal tension of all steel strand, greatly improve the production efficiency of prestressed concrete composite slab, and the crossbeam of adjustable position combines the mode that steel strand is connected with main line and auxiliary line, can greatly reduce the waste of steel strand. The wire hole of different aperture that is set up on multiple crossbeams can be compatible with steel strand of different wire diameter, and the bolt hole that is set up can adjust the height of steel strand according to the thickness and index of prestressed concrete composite slab. The scale that is set up on adjustable fixed base can more intuitively read the elongation of steel strand. The setting of safety fence can better prevent the injury of steel strand, thereby improve the security. The utility model can ensure that all steel strands are synchronously stretched, and can be compatible with steel strands of different sizes, meet different use demands, and can reduce the waste of steel strand, improve the security and convenience in the production process. ACCURACY OF DRAWINGS

[0013] Figure 1 It is the structure schematic drawing of the utility model;

[0014] Figure 2 It is the structure schematic drawing of adjustable fixed end crossbeam connection safety fence of the utility model;

[0015] Figure 3The adjustable fixed pedestal structure schematic view of the utility model shows that

[0016] Figure 4 The fixed cross beam structure schematic view of the utility model shows that

[0017] Figure 5 The fixed cross beam connection safety protection net structure schematic view of the utility model shows that

[0018] In the figure: 1, clamping part; 101, first clamp; 102, second clamp; 103, third clamp; 2, steel strand; 201, main line; 202, auxiliary line; 3, adjustable fixed end cross beam; 301, first line perforation; 302, first bolt hole; 4, mould base; 5, adjustable fixed pedestal; 501, fixed plate; 502, connecting plate; 503, reinforcing rib; 6, safety protection net; 7, fixed cross beam; 701, second line perforation; 702, second bolt hole; 8, movable cross beam; 9, line connector; 10, prefabricated component mould; 11, hydraulic oil cylinder; 1101, first hydraulic cylinder; 1102, second hydraulic cylinder; 12, hydraulic pump station; 13, primary oil delivery pipe; 14, primary oil return pipe; 15, first synchronous motor shunt valve; 16, second synchronous motor shunt valve; 17, secondary oil delivery pipe; 1701, first oil delivery pipe; 1702, second oil delivery pipe; 18, secondary oil return pipe; 1801, first oil return pipe; 1802, second oil return pipe; 19, telescopic rod; 20, pointer. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model. Embodiment 1

[0020] As Figures 1 to 5 shown, the utility model discloses a kind of for fixed mould base prestressed steel strand overall synchronous tensioning device, the technical solutions used are, including mould base 4, there is prefabricated component mould 10 on mould base 4, to be able to wear and fixed steel strand 2, adjustable fixed end cross beam 3 is arranged on the end face of mould base 4, end face fixed bolt hole is opened on the end face of mould base 4 along length direction. As Figure 2As shown, the adjustable fixed end beam 3 includes the first threading part of the upper part and the first fixed part of the lower part, the first threading part is provided with the first wire through hole 301, in order to be compatible with different wire diameters of the steel strand 2, the first wire through hole 301 has three rows, the hole diameter gradually increases from top to bottom; The first fixed part is provided with the first bolt hole 302, the first bolt hole 302 is longitudinally provided, two columns are a group, a total of six groups, the first bolt hole 302 corresponds to the position of the end face fixing bolt hole on the mold table 4 and is matched in size. In order to prevent the steel strand 2 from hurting people, the safety protection net 6 is arranged above the first threading part. After the main wire 201 of the steel strand 2 passes through the first wire through hole 301, it is fixed on the adjustable fixed end beam 3 through the first clamp 101 of the clamping piece 1, and the first clamp 101 is located on the side of the adjustable fixed end beam 3 away from the mold table 4.

[0021] In order to facilitate the fixing of the other end of the steel strand 2, and at the same time to reduce the waste amount of the steel strand 2, the side face fixing bolt hole is provided on the end face of the mold table 4 in the width direction, the side face fixing bolt hole is provided in multiple rows along the length direction of the mold table 4, each row has multiple side face fixing bolt holes, and the adjustable fixed base 5 is connected to the side face of the mold table 4, as shown in Figure 3 As shown, the adjustable fixed base 5 includes the fixed plate 501 and the connecting plate 502, the fixed plate 501 is a T-shaped plate, including a horizontal plate and a vertical plate, the horizontal plate is connected to the end face of the connecting plate 502 in the middle, the vertical plate is provided with the third bolt hole, the third bolt hole corresponds to the position of the side face fixing bolt hole and is matched in size, the connecting plate 502 is provided with the fourth bolt hole, the fourth bolt hole is a single column round hole, in order to improve the strength of the adjustable fixed base 5, the reinforcing rib 503 is arranged between the fixed plate 501 and the connecting plate 502. The fixed beam 7 is installed on the adjustable fixed base 5, as shown in Figure 4As shown, the fixed cross beam 7 is a long strip plate, including the second threading part and the second fixed part, the second fixed part is located at both ends of the second threading part, three rows of second wire through holes 701 are arranged on the second fixed part, the diameters of the three rows of second wire through holes 701 gradually increase from top to bottom, and the diameters of the wire through holes in the same row are the same, the diameters of the three rows of second wire through holes 701 of the fixed cross beam 7 are the same as the diameters of the three rows of first wire through holes 301 of the adjustable fixed end cross beam 3, and the positions are corresponding. The second fixed part is a second bolt hole 702, which is two rows of single round holes, arranged on both sides of the second threading part, and corresponding in position and matching in size with the fourth bolt hole of the adjustable fixed pedestal 5, the fourth bolt hole and the second bolt hole 702 are connected by a second connecting bolt. In order to improve safety, the safety protection net 6 is connected to the fixed cross beam 7. The main wire 201 of the steel strand 2 passes through the second wire through hole 701, and the main wire 201 is fixed on the fixed cross beam 7 by using the second clamp 102 of the clamping piece 1, and the second clamp 102 is located away from the prefabricated component mold 10. In order to be able to simultaneously tension the steel strand 2, the hydraulic oil cylinder 11 is connected between the fixed cross beam 7 and the movable cross beam 8, the fixed end of the hydraulic oil cylinder 11 is connected with the fixed cross beam 7, the telescopic end is connected with the movable cross beam 8, the movable cross beam 8 is provided with third wire through holes corresponding in position and matching in size with the second wire through holes 701 of the fixed cross beam 7, the auxiliary wire 202 of the steel strand 2 passes through the third wire through hole, and the auxiliary wire 202 is connected to the movable cross beam 8 by the third clamp 103 of the clamping piece 1, and the third clamp 103 is located away from the prefabricated component mold 10. The main wire 201 and the auxiliary wire 202 are connected by the wire connector 9. In order to facilitate the viewing of the stretching amount of the steel strand 2, a scale is arranged on the adjustable fixed pedestal 5, and a telescopic rod 19 is arranged on the movable cross beam 8, the telescopic rod 19 includes a fixed tube and a movable rod, the movable rod is slidingly connected in the fixed tube, the fixed tube is connected with the movable cross beam 8, and a locking screw hole is arranged on the side wall of the fixed tube, a locking screw is engaged in the locking screw hole, the end surface of the locking screw is in sliding contact with the movable rod, and the movable rod can be fixed by friction through the rotation of the locking screw. The movable rod is connected with a pointer 20, and the pointer 20 is slidingly connected on the scale.

[0022] The hydraulic cylinder 11 comprises a first hydraulic cylinder 1101 and a second hydraulic cylinder 1102, in order to ensure that the first hydraulic cylinder 1101 and the second hydraulic cylinder 1102 can act synchronously and extend and retract equally, the hydraulic control system is connected with a first oil conveying pipe 13 and a first oil return pipe 14, the first oil conveying pipe 13 and the first oil return pipe 14 are connected with a first synchronous motor distributing valve 15 and a second synchronous motor distributing valve 16 respectively, the first synchronous motor distributing valve 15 and the second synchronous motor distributing valve 16 are both one-in-two-out type distributing valves, two outlets of the first synchronous motor distributing valve 15 are connected with a first oil conveying pipe 1701 and a second oil conveying pipe 1702 of a second oil conveying pipe 17 respectively, the first oil conveying pipe 1701 is connected with a piston rear end oil way interface of the first hydraulic cylinder 1101, and the second oil conveying pipe 1702 is connected with a piston rear end oil way interface of the second hydraulic cylinder 1102; and two outlets of the second synchronous motor distributing valve 16 are connected with a first oil return pipe 1801 and a second oil return pipe 1802 of a second oil return pipe 18 respectively, the first oil return pipe 1801 is connected with a piston front end oil way interface of the first hydraulic cylinder 1101, and the second oil return pipe 1802 is connected with a piston front end oil way interface of the second hydraulic cylinder 1102.

[0023] The working principle of the utility model:

[0024] According to the size requirement of the prestressed concrete composite slab, the adjustable fixed end beam 3 is installed on the mold table 4 at a suitable height, the fixed beam 7 is installed on the adjustable fixed pedestal 5, and the adjustable fixed pedestal 5 is installed with suitable side fixed bolt holes, so that the second line perforation 701 of the fixed beam 7 is opposite to the first line perforation 301 of the adjustable fixed end beam 3, so as to reduce the waste amount of the steel strand 2. The main line 201 of the steel strand 2 is passed through the first line perforation 301 and the second line perforation 701, and the first clamp 101 is used to fix the end of the main line 201 close to the adjustable fixed end beam 3, the auxiliary line 202 is passed through the third line perforation of the movable beam 8, and the main line 201 and the auxiliary line 202 are connected by using the wire connector 9. The lock bolt is screwed to loosen the movable rod, the position of the movable rod is adjusted to zero the pointer 20 on the scale, and then the lock bolt is locked. The upper computer is operated to start the hydraulic pump in the hydraulic pump station 12, output hydraulic oil through the first oil pipe 13, and drive the first hydraulic cylinder 1101 and the second hydraulic cylinder 1102 to synchronously and equally elongate after being branched by the first synchronous motor distribution valve 15, push the movable beam 8 to move, straighten the steel strand 2, and read the stretching amount through the position of the pointer 20 on the scale, and the second clamp 102 is used to fix the end of the main line 201 close to the fixed beam 7. During the stretching process, the safety protection net 6 can protect the workers from being injured by the steel strand 2 that may suddenly break. After the main line 201 is fixed, the wire connector 9 is disassembled, the main line 201 and the auxiliary line 202 are separated, the concrete is poured into the prefabricated component mold 10, and the prestressed concrete composite slab is prepared. After preparation, the upper computer is operated to reset the first hydraulic cylinder 1101 and the second hydraulic cylinder 1102.

[0025] The mechanical connection of the utility model relates to the common means adopted by the person skilled in the art, and can be obtained by limited tests, and belongs to the public knowledge.

[0026] The components not described in detail in the present document are prior art.

[0027] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A device for the overall synchronous tensioning of prestressed steel strands on a fixed mold platform, comprising a mold platform (4), wherein a precast component mold (10) is mounted on the mold platform (4), and a crossbeam is mounted on the mold platform (4), wherein steel strands (2) are connected between the crossbeams by clamping members (1), and the mold platform (4) has end face fixing bolt holes and side fixing bolt holes, characterized in that: The crossbeam comprises an adjustable fixed end crossbeam (3), a fixed crossbeam (7) and a movable crossbeam (8), the adjustable fixed end crossbeam (3) is detachably connected to the mold table (4), the fixed crossbeam (7) is installed on the mold table (4) through an adjustable fixed pedestal (5), the movable crossbeam (8) is connected to the fixed crossbeam (7) through a linear driving mechanism, and a synchronous driving assembly is arranged on the control system of the linear driving mechanism; the steel strand (2) and the adjustable fixed end crossbeam (3), the fixed crossbeam (7) and the movable crossbeam (8) are all provided with clamping pieces (1), and the crossbeam is provided with a safety protection net (6); bolt holes and wire holes with different diameters are arranged in the adjustable fixed end crossbeam (3), the fixed crossbeam (7) and the movable crossbeam (8), and the wire holes with the same diameter in the adjustable fixed end crossbeam (3), the fixed crossbeam (7) and the movable crossbeam (8) correspond to each other.

2. The device for fixed mold table prestressed steel strand whole body synchronous tensioning according to claim 1, characterized in that: The clamping piece (1) comprises a first clamp (101), a second clamp (102) and a third clamp (103), the first clamp (101) connects the steel strand (2) and the adjustable fixed end crossbeam (3), the second clamp (102) connects the steel strand (2) and the fixed crossbeam (7), and the third clamp (103) connects the steel strand (2) and the movable crossbeam (8).

3. The device for fixed mold table prestressed steel strand whole body synchronous tensioning according to claim 2, characterized in that: The steel strand (2) comprises a main wire (201) and an auxiliary wire (202), the main wire (201) is connected to the adjustable fixed end crossbeam (3) and the fixed crossbeam (7) through the first clamp (101) and the second clamp (102), one end of the auxiliary wire (202) is connected to the movable crossbeam (8) through the third clamp (103), and the other end of the auxiliary wire (202) is connected to the main wire (201) through a wire connector (9).

4. The device for fixed mold table prestressed steel strand whole body synchronous tensioning according to claim 1, characterized in that: The adjustable fixed end crossbeam (3) comprises a first wire passing part and a first fixed part, the first wire passing part is located above the first fixed part, a plurality of rows of first wire holes (301) with different diameters are arranged in the first wire passing part, and each row of the first wire holes (301) has the same diameter; a plurality of groups of first bolt holes (302) are arranged in the first fixed part, the first bolt holes (302) correspond to the position of the end face fixing bolt holes of the mold table (4) and are matched in size.

5. The device for fixed mold table prestressed steel strand whole body synchronous tensioning according to claim 1, characterized in that: The fixed crossbeam (7) comprises a second wire passing part and a second fixed part, the second fixed part is arranged on both sides of the second wire passing part, a plurality of rows of second wire holes (701) with different diameters are arranged in the second wire passing part, and each row of the second wire holes (701) has the same diameter; and the second fixed part is provided with second bolt holes (702).

6. The device for fixed mold table prestressed steel strand whole body synchronous tensioning according to claim 5, characterized in that: The adjustable fixed pedestal (5) includes a fixed plate (501) and a connecting plate (502), the end surface of the connecting plate (502) is connected with the fixed plate (501), the fixed plate (501) has third bolt holes corresponding to the position of the side fixed bolt holes of the mold base (4) and matching in size; the connecting plate (502) has fourth bolt holes corresponding to the position of the second bolt holes (702) of the fixed cross beam (7) and matching in size.

7. The device for fixed mold table prestressed steel strand whole body synchronous tensioning according to claim 6, characterized in that: The fixed plate (501) and the connecting plate (502) are further connected with a reinforcing rib (503); the adjustable fixed pedestal (5) is further provided with a scale.

8. The device for fixed mold table prestressed steel strand integral synchronous tensioning according to claim 1, characterized in that: The linear drive mechanism is a hydraulic oil cylinder (11), the hydraulic oil cylinder (11) has a plurality of hydraulic oil cylinders (11) connected to a hydraulic control system; the hydraulic oil cylinder (11) includes a first hydraulic cylinder (1101) and a second hydraulic cylinder (1102), the hydraulic control system includes a hydraulic pump station (12), the hydraulic pump station (12) is connected with a first oil pipe (13) and a first return oil pipe (14), the first oil pipe (13) is connected with a first oil pipe (1701) and a second oil pipe (1702) of a second oil pipe (17) after being connected with a first synchronous motor shunt valve (15), the first oil pipe (1701) is connected with the rear end oil way interface of the piston of the first hydraulic cylinder (1101), the second oil pipe (1702) is connected with the rear end oil way interface of the piston of the second hydraulic cylinder (1102); the first return oil pipe (14) is connected with a first return oil pipe (1801) and a second return oil pipe (1802) of a second return oil pipe (18) after being connected with a second synchronous motor shunt valve (16), the first return oil pipe (1801) is connected with the front end oil way interface of the piston of the first hydraulic cylinder (1101), the second return oil pipe (1802) is connected with the front end oil way interface of the piston of the second hydraulic cylinder (1102).

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