CN116789024A - Steel strand jack with pre-tightening function - Google Patents

Abstract

The invention discloses a steel strand jack with a pre-tightening function, which belongs to the field of jacks and comprises an annular supporting plate, wherein a lifting handle is fixedly arranged on the annular supporting plate, a lifting assembly, an auxiliary assembly and a fixing assembly are arranged in the annular supporting plate, the round anchorage device, the lifting circular plate and the clamping circular plate are arranged in a detachable mode, so that the required round anchorage device, the lifting circular plate and the clamping circular plate can be replaced according to the number and the distribution positions of steel strands to be tensioned, the fixing assembly can enable a trapezoidal pressing plate to fix the steel strands first, then the steel strands are in a straight state under the action of the annular pressing plate and the lifting cylinder, breakage caused by uneven stress of the steel strands is avoided, and the jack assembly can be realized firstly and then the steel strands are pre-tightened and tensioned through the mutual cooperation of the lifting assembly, the auxiliary assembly and the fixing assembly, so that the working efficiency of the jack can be greatly improved.

Description

Steel strand jack with pre-tightening function

Technical Field

The invention relates to the technical field of jacks, in particular to a steel strand jack with a pre-tightening function.

Background

The steel strand jack mainly comprises a compactor shell, a compaction piston, steel strands and the like, and realizes the pulling effect through the compression force acting on the compaction piston and the reaction force acting on the pressed object, has the characteristics of uniform structure, convenient use, high lifting efficiency and the like, is suitable for many occasions needing large-force bearing, such as the fields of construction sites, automobile maintenance and the like, clamps of the steel strands by the existing steel strand jack are synchronous, and the condition that certain steel strands are not completely fixed easily occurs, thereby causing larger damage to the steel strands due to uneven stress in the process of lifting heavy objects.

The Chinese patent application with the bulletin number of CN205061461U discloses a lifting jack with a lifting pre-tightening device, which comprises an upper clamping top, a main top, a lower clamping top and the lifting pre-tightening device which are sequentially connected, wherein the lifting pre-tightening device consists of an upper lifting clamping piece, a pressing plate and a pre-tightening block, the pre-tightening block is a short cylinder with a boss at the bottom, and n taper holes for installing the lifting clamping piece are formed in the short cylinder; the pressing plate is in a circular ring shape, m through holes are formed in the circular ring, and an inner step is formed in the circular ring; in the working state, the pre-tightening block is fixedly arranged on the upper clamping top of the main top, and the upper lifting clamping piece is placed in a taper hole of the corresponding pre-tightening block which needs to be adjusted for the steel strand; the pressing plate is positioned at the outer side of the pre-tightening block, the inner step of the pressing plate is clamped on the boss of the pre-tightening block, the bolt and the gasket penetrate through the through hole on the outer surface of the pressing plate, and the pressing plate, the pre-tightening block and the upper clamping top are connected.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the steel strand jack with the pre-tightening function, which solves the problems that the pre-tightening of a plurality of steel strands is easy to be incompletely fixed, the number of the stressed steel strands is reduced, the acting force born by the stressed steel strands is increased, and the steel strands are easily damaged.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a steel strand wires jack with pretension function, including annular support plate, fixedly mounted has the hoist and mount handle in the annular support plate, be provided with the lifting subassembly in the annular support plate, the lifting subassembly includes circular outer cylinder, fixedly mounted has circular interior cylinder in the circular outer cylinder, sliding mounting has tensioning cylinder and ring magnet two on the circular interior cylinder, the terminal surface of tensioning cylinder is fixedly provided with annular magnet one, tensioning cylinder goes up the activity and is provided with the lifting round seat, the lifting round seat is fixed and is provided with auxiliary ring plate, be provided with auxiliary subassembly and fixed subassembly in the annular support plate, auxiliary subassembly includes circular anchor plate, circular anchor plate is last to be provided with a plurality of through-holes with steel strand wires complex, circular interior cylinder goes up even slidable mounting has 4 auxiliary slide bars one, sliding fit is provided with 4 slotted holes with auxiliary slide bar one complex in the circular interior cylinder, auxiliary slide bar one is used for making circular anchor plate and circular interior cylinder fixed connection, the fixed subassembly includes the lifting round plate and lifting round plate swing joint, lifting round plate is gone up and is provided with a plurality of lifting round plates, lifting round plate and lifting round plate is provided with the trapezoidal clamp plate, the lifting round plate is all is pressed to slide-down to slide-press the trapezoidal clamp plate and is fixed according to the trapezoidal clamp and is gone up.

Further, circular outer cylinder fixed mounting is in annular support plate, circular outer cylinder, stretch-draw cylinder, circular interior cylinder, ring magnet one, ring magnet two's axis all is on same straight line, form airtight cavity between circular outer cylinder, circular interior cylinder, the ring magnet two, the fixed oil pipe and the blast pipe of being provided with of axisymmetric on the circular outer cylinder, oil pipe one all with circular outer cylinder, circular interior cylinder, the airtight cavity intercommunication that ring magnet two formed, circular outer cylinder, stretch-draw cylinder, circular interior cylinder, ring magnet one, form airtight cavity between the ring magnet two, the blast pipe all with circular outer cylinder, stretch-draw cylinder, circular interior cylinder, ring magnet one, the airtight cavity intercommunication that ring magnet two formed.

Further, the auxiliary assembly comprises an auxiliary ring frame which is slidably mounted on the circular outer cylinder barrel, 4 circular magnets are fixedly arranged on the auxiliary ring frame, 4 circular grooves matched with the circular magnets are formed in the second annular magnet, 4 strip-shaped chute plates I are uniformly and fixedly arranged on the auxiliary ring frame, short rods are fixedly arranged on the side faces of the first auxiliary sliding rod, and the short rods on the side faces of the auxiliary sliding rod are movably connected with the first strip-shaped chute plates.

Further, 4 auxiliary slats are evenly installed in the sliding mode on the round outer cylinder barrel, springs are arranged between the auxiliary slats and the round outer cylinder barrel, grooves matched with the auxiliary ring frames are formed in the end portions of the auxiliary slats, 4 trapezoid blocks are evenly and fixedly arranged on the tensioning cylinder barrel, and the trapezoid blocks are used for pushing the auxiliary slats to move.

Further, the fixed subassembly still includes fixed ring frame and a plurality of spacing circle piece, fixed ring frame slidable mounting is on the stretch-draw cylinder, even fixed being provided with 4 transfer lines on the fixed ring frame, transfer line and two fixed connection of ring magnet, even slidable mounting has 4 supplementary slide bars second on the stretch-draw cylinder, be provided with 4 and supplementary slide bar second complex slotted hole on the round seat of rising, the side of supplementary slide bar second all is provided with the quarter butt, fixed being provided with 4 bar inclined groove boards second on the fixed ring frame, the quarter butt of supplementary slide bar second side and the two swing joint of corresponding bar inclined groove board.

Further, the transmission rod is in sliding fit with the round outer cylinder, the transmission rod is in sliding fit with the tensioning cylinder, 4 bolts are arranged between the lifting round seat and the lifting round plate, the lifting round seat and the lifting round plate are fixedly connected through bolts, 4 bolts are arranged between the lifting ring plate and the clamping round plate, and the lifting ring plate and the clamping round plate are fixedly connected through bolts.

Further, the end parts of the lifting cylinders are provided with threads, the limiting round blocks are in threaded fit with the corresponding lifting cylinders, the lifting round plates are limited in position by the limiting round blocks, springs are arranged between the lifting round plates and the lifting round plates, the annular pressing plates are symmetrically and fixedly provided with yielding slide bars, springs are arranged between the yielding slide bars and the clamping round plates, and springs are arranged between the trapezoidal pressing plates and the lifting round plates.

Further, 2 pre-tightening cylinder barrels are fixedly arranged on the pull-up round seat in an axisymmetric mode, 2 piston rods are fixedly arranged on the pull-up annular plate in an axisymmetric mode, the piston rods are in sliding fit with the pre-tightening cylinder barrels, a closed cavity is formed between the pre-tightening cylinder barrels and the piston rods, an oil conveying pipe II is fixedly arranged on the pre-tightening cylinder barrels, the oil conveying pipe II is communicated with the closed cavity formed by the pre-tightening cylinder barrels and the piston rods, and an oil conveying hose is arranged between the oil conveying pipe II and the corresponding oil conveying pipe I.

Further, friction force exists between the tensioning cylinder barrel and the circular inner cylinder barrel, and the friction force between the tensioning cylinder barrel and the circular inner cylinder barrel is larger than the sum of the elastic force of the spring between the pulling cylinder barrel and the limiting circular block and the elastic force of the spring between the abdicating slide rod and the clamping circular plate.

Compared with the prior art, the invention has the beneficial effects that: (1) According to the invention, the round anchor, the lifting circular plate and the clamping circular plate are arranged in a detachable mode, so that the round anchor, the lifting circular plate and the clamping circular plate can be replaced conveniently according to the number and the distribution positions of the steel strands to be tensioned. (2) According to the invention, the fixing assembly is arranged, so that the trapezoid pressing plate can fix the steel strand first, and then the steel strand is in a straightened state under the action of the annular pressing plate and the pulling cylinder, so that the steel strand is prevented from being broken due to uneven stress. (3) According to the invention, through the mutual matching of the lifting assembly, the auxiliary assembly and the fixing assembly, the jack assembly can be realized quickly, and then the steel stranded wires are pre-tensioned and stretched, so that the working efficiency of the jack can be greatly improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic view of the structure of the auxiliary slat of the present invention.

Fig. 3 is an enlarged partial schematic view at a in fig. 2.

Fig. 4 is a schematic view of the structure of the inside of the circular inner cylinder barrel of the present invention.

Fig. 5 is a partially enlarged schematic view at B in fig. 4.

Fig. 6 is a cross-sectional view of the overall structure of the present invention.

Fig. 7 is an enlarged partial schematic view at C in fig. 6.

Fig. 8 is a schematic view of the structure of the fixing ring frame of the present invention.

Fig. 9 is a partially enlarged schematic view of fig. 8 at D.

Fig. 10 is a schematic structural view of the lifting round seat of the present invention.

FIG. 11 is a schematic view of the structure of the pre-tightening cylinder barrel of the present invention.

Fig. 12 is a schematic view of the structure of the lifting ring plate of the present invention.

Fig. 13 is a partially enlarged schematic illustration at E in fig. 12.

Fig. 14 is a schematic view of the structure of the annular pressing plate of the present invention.

Fig. 15 is a cross-sectional view of a pull-up cylinder of the present invention.

Fig. 16 is a partially enlarged schematic illustration at F in fig. 15.

FIG. 17 is a cross-sectional view of the structure at the pretensioning cylinder of the present invention.

Fig. 18 is a partially enlarged schematic view at G in fig. 17.

Reference numerals: 101-an annular support plate; 102-hoisting a handle; 103-an auxiliary ring frame; 104-a circular outer cylinder; 105-fixing ring frames; 106-oil delivery pipe I; 107-an oil delivery hose; 108-pre-tightening the cylinder barrel; 109-exhaust pipe; 110-stretching the cylinder barrel; 111-lifting a round seat; 112-auxiliary laths; 113-circular anchor plate; 114-a circular inner cylinder; 115-oil delivery pipe II; 116-auxiliary slide bar I; 117-first strip chute plate; 118-a transmission rod; 119-a piston rod; 120-auxiliary ring plates; 121-a circular magnet; 122-ring magnet one; 123-ring magnet two; 124-trapezoidal blocks; 125-auxiliary slide bar II; 126-a second strip-shaped chute plate; 127-pulling up the circular plate; 128-lifting the ring plate; 129-limit round blocks; 130-pulling up the cylinder; 131-an annular pressing plate; 132-clamping the circular plate; 133-abdicating the slide bar; 134-trapezoidal pressing plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Examples: referring to fig. 1-18, a steel strand jack with a pre-tightening function comprises an annular supporting plate 101, wherein a lifting handle 102 is fixedly installed on the annular supporting plate 101, a lifting assembly is arranged in the annular supporting plate 101 and comprises a circular outer cylinder barrel 104, the circular outer cylinder barrel 104 is fixedly installed in the annular supporting plate 101, a circular inner cylinder barrel 114 is fixedly installed in the circular outer cylinder barrel 104, a tensioning cylinder barrel 110 and a second ring magnet 123 are slidably installed on the circular inner cylinder barrel 114, a first ring magnet 122 is fixedly arranged on the end face of the tensioning cylinder barrel 110, a lifting round seat 111 is movably arranged on the tensioning cylinder barrel 110, and an auxiliary ring plate 120 is fixedly arranged on the lifting round seat 111.

The axes of the annular supporting plate 101, the circular outer cylinder 104, the tensioning cylinder 110, the circular inner cylinder 114, the first annular magnet 122 and the second annular magnet 123 are all on the same straight line, an airtight chamber is formed among the circular outer cylinder 104, the circular inner cylinder 114 and the second annular magnet 123, an oil delivery pipe 106 and an exhaust pipe 109 are fixedly arranged on the circular outer cylinder 104 in an axisymmetric mode, the two oil delivery pipes 106 are communicated with the airtight chamber formed by the circular outer cylinder 104, the circular inner cylinder 114 and the second annular magnet 123, an airtight chamber is formed among the circular outer cylinder 104, the tensioning cylinder 110, the circular inner cylinder 114, the first annular magnet 122 and the second annular magnet 123, and the exhaust pipe 109 is communicated with the airtight chamber formed by the circular outer cylinder 104, the tensioning cylinder 110, the circular inner cylinder 114, the first annular magnet 122 and the second annular magnet 123.

In the initial position, the second ring magnet 123 is located at the position closest to the first oil delivery pipe 106, at this time, the first ring magnet 122 and the second ring magnet 123 are not in contact, and the tensioning cylinder 110 is in contact with the end surfaces of the circular outer cylinder 104 and the circular inner cylinder 114, hydraulic oil is introduced into a closed cavity formed by the circular outer cylinder 104, the circular inner cylinder 114 and the second ring magnet 123 through the first oil delivery pipe 106, so as to drive the second ring magnet 123 to slide on the circular inner cylinder 114, that is, the second ring magnet 123 moves towards the direction close to the first ring magnet 122, finally, the second ring magnet 123 is in contact with the first ring magnet 122, the first ring magnet 122 and the second ring magnet 123 are fixedly adsorbed, the first oil delivery pipe 106 continues to inject hydraulic oil, and then the first ring magnet 122 and the second ring magnet 123 synchronously move towards the direction far from the first oil delivery pipe 106, that is the tensioning cylinder 110 moves towards the direction far from the first oil delivery pipe 106, the gas in the closed cavity formed by the circular outer cylinder 104, the tensioning cylinder 110, the circular inner cylinder 114, the first annular magnet 122 and the second annular magnet 123 is discharged from the exhaust pipe 109, hydraulic oil in the closed cavity formed by the circular outer cylinder 104, the circular inner cylinder 114 and the second annular magnet 123 is discharged through the first oil delivery pipe 106, the first annular magnet 122 and the second annular magnet 123 are in adsorption fixation thematic, the tensioning cylinder 110, the first annular magnet 122 and the second annular magnet 123 are further moved towards the direction close to the first oil delivery pipe 106, finally, the end surfaces of the tensioning cylinder 110, which are contacted with the circular outer cylinder 104 and the circular inner cylinder 114, cannot be continuously moved, hydraulic oil in the closed cavity formed by the circular outer cylinder 104, the circular inner cylinder 114 and the second annular magnet 123 is continuously discharged, the second annular magnet 123 moves relative to the first annular magnet 122, i.e., ring magnet two 123 is out of contact with ring magnet one 122.

The annular supporting plate 101 is internally provided with an auxiliary assembly, the auxiliary assembly comprises a circular anchor plate 113, a plurality of through holes matched with steel strands are formed in the circular anchor plate 113, the circular anchor plate 113 is in sliding fit with the circular inner cylinder 114 in a joint mode, 4 auxiliary first slide bars 116 are uniformly arranged on the circular inner cylinder 114 in a sliding mode, 4 slotted holes matched with the auxiliary first slide bars 116 are formed in the circular anchor plate 113, and the auxiliary first slide bars 116 are used for enabling the circular anchor plate 113 to be fixedly connected with the circular inner cylinder 114.

The auxiliary ring frame 103 is slidably mounted on the circular outer cylinder barrel 104, 4 circular magnets 121 are fixedly arranged on the auxiliary ring frame 103, 4 circular grooves matched with the circular magnets 121 are formed in the second annular magnets 123, 4 strip-shaped inclined groove plates 117 are uniformly and fixedly arranged on the auxiliary ring frame 103, short rods are fixedly arranged on the side faces of the first auxiliary sliding rods 116, the short rods on the side faces of the first auxiliary sliding rods 116 are movably connected with the strip-shaped inclined groove plates 117, 4 auxiliary laths 112 are uniformly slidably mounted on the circular outer cylinder barrel 104, springs are arranged between the auxiliary laths 112 and the circular outer cylinder barrel 104, grooves matched with the auxiliary ring frame 103 are uniformly formed in the end portions of the auxiliary laths 112, 4 trapezoid blocks 124 are uniformly and fixedly arranged on the tensioning cylinder barrel 110, and the trapezoid blocks 124 are used for pushing the auxiliary laths 112 to move.

In the initial position, the tensioning cylinder 110 and the second ring magnet 123 are both located at the position closest to the first oil delivery pipe 106, the circular grooves on the circular magnet 121 and the second ring magnet 123 are in an engaged state, at this time, the circular magnet 121 and the second ring magnet 123 are fixedly adsorbed, the end face of the trapezoid block 124 farthest from the circular outer cylinder 104 is in contact with the auxiliary slat 112, the spring between the auxiliary slat 112 and the circular outer cylinder 104 is in a compressed state, the groove of the end part of the auxiliary slat 112 matched with the auxiliary ring frame 103 is not in contact with the auxiliary ring frame 103, the auxiliary ring frame 103 is located at the position farthest from the tensioning cylinder 110, and at this time, under the action of the first bar-shaped inclined groove plate 117, the first auxiliary slide rod 116 is located at the position farthest from the axis of the circular inner cylinder 114.

After the circular anchor plate 113 is slidably installed in the circular inner cylinder 114, the axis of the auxiliary sliding rod 116 and the axis of the slot hole matched with the auxiliary sliding rod 116 on the circular anchor plate 113 are on the same straight line, hydraulic oil is introduced into a closed cavity formed by the oil delivery pipe I106, the circular inner cylinder 114 and the annular magnet II 123, so that the annular magnet II 123 moves away from the oil delivery pipe I106, at the moment, the circular magnet 121 and the annular magnet II 123 are in an adsorption fixing state, namely, the circular magnet 121 and the annular magnet II 123 synchronously move away from the oil delivery pipe I106, namely, the auxiliary ring frame 103 moves towards the direction close to the tensioning cylinder 110, namely, the strip-shaped inclined groove plate I117 moves towards the tensioning cylinder 110, the auxiliary sliding rod I116 moves towards the direction close to the axis of the circular inner cylinder 114 under the action of the strip-shaped inclined groove plate I117, and finally, the side surface of the auxiliary ring frame 103, which is contacted with the circular outer cylinder 104, cannot move continuously, at the moment, the auxiliary ring frame 116 and the slot hole on the circular anchor plate 113 are jointed, under the action of the auxiliary sliding rod I116 and the circular anchor plate 113, the circular anchor plate 113 is fixedly connected with the circular inner cylinder 110.

And at this time, the second ring magnet 123 contacts the first ring magnet 122, the second ring magnet 123 continues to move, so that the tensioning cylinder 110 moves away from the first oil delivery pipe 106, that is, the trapezoidal block 124 gradually releases the support to the auxiliary lath 112, the spring between the auxiliary lath 112 and the circular outer cylinder 104 starts to recover, the end of the auxiliary lath 112 moves towards the direction close to the auxiliary ring frame 103, finally the trapezoidal block 124 breaks away from contact with the auxiliary lath 112, the spring between the auxiliary lath 112 and the circular outer cylinder 104 completely recovers, at this time, the end of the auxiliary lath 112 is engaged with the auxiliary ring frame 103, and under the action of the auxiliary ring frame 103, the auxiliary ring frame 103 cannot move relative to the circular outer cylinder 104.

The annular supporting plate 101 is internally provided with a fixing assembly, the fixing assembly comprises a lifting circular plate 127 and a plurality of limiting circular blocks 129, the lifting circular plate 127 is movably connected with a lifting circular seat 111, 4 bolts are arranged between the lifting circular seat 111 and the lifting circular plate 127, the lifting circular seat 111 is fixedly connected with the lifting circular plate 127 through the bolts, a plurality of lifting cylinders 130 are slidably arranged on the lifting circular plate 127, the end parts of the lifting cylinders 130 are provided with threads, the limiting circular blocks 129 are in threaded fit with the corresponding lifting cylinders 130, the lifting circular plate 127 and the lifting cylinders 130 are limited in position through the limiting circular blocks 129, and springs are arranged between the lifting cylinders 130 and the lifting circular plate 127.

The tensioning cylinder 110 is provided with a fixed ring frame 105 in a sliding manner, 4 transmission rods 118 are uniformly and fixedly arranged on the fixed ring frame 105, the transmission rods 118 are fixedly connected with the second annular magnet 123, the transmission rods 118 are in sliding fit with the circular outer cylinder 104, the transmission rods 118 are in sliding fit with the tensioning cylinder 110, 4 second auxiliary sliding rods 125 are uniformly and slidably arranged on the tensioning cylinder 110, 4 slotted holes matched with the second auxiliary sliding rods 125 are formed in the lifting circular seat 111, short rods are respectively arranged on the side faces of the second auxiliary sliding rods 125, 4 second strip-shaped inclined groove plates 126 are fixedly arranged on the fixed ring frame 105, and the short rods on the side faces of the second auxiliary sliding rods 125 are movably connected with the corresponding second strip-shaped inclined groove plates 126.

In the initial position, the fixed ring frame 105 is located at the nearest position to the circular outer cylinder 104, the second auxiliary slide rod 125 is located at the farthest position from the axis of the circular inner cylinder 114, the lifting round seat 111 is connected with the tensioning cylinder 110, and the axis of the second auxiliary slide rod 125 and the axis of the slot hole on the lifting round seat 111, which is matched with the second auxiliary slide rod 125, are on the same straight line.

When the second ring magnet 123 is driven to move, the fixed ring frame 105 moves synchronously under the action of the transmission rod 118, namely the second strip-shaped chute plate 126 moves in a direction away from the fixed ring frame 105, so that the second auxiliary slide rod 125 moves in a direction close to the axis of the circular inner cylinder 114, when the second ring magnet 123 contacts the first ring magnet 122, the second auxiliary slide rod 125 and the lifting round seat 111 are in an engaged state, the lifting round seat 111 and the tensioning cylinder 110 are in a fixed state under the action of the second auxiliary slide rod 125, and the second ring magnet 123 is continuously driven to move at the moment, and the tensioning cylinder 110 and the lifting round seat 111 synchronously move.

The lifting circular base 111 is provided with a lifting circular plate 128 in a sliding mode, the lifting circular plate 128 is movably provided with a clamping circular plate 132, 4 bolts are arranged between the lifting circular plate 128 and the clamping circular plate 132, the lifting circular plate 128 and the clamping circular plate 132 are fixedly connected through the bolts, the clamping circular plate 132 is movably provided with a plurality of annular pressing plates 131, the annular pressing plates 131 are symmetrically and fixedly provided with a yielding slide bar 133, a spring is arranged between the yielding slide bar 133 and the clamping circular plate 132, the lifting cylinder 130 is provided with 4 trapezoidal pressing plates 134 in a sliding mode, the trapezoidal pressing plates 134 slide to fix steel strands, and the spring is arranged between the trapezoidal pressing plates 134 and the lifting cylinder 130.

There is a friction between the tensioning cylinder 110 and the circular inner cylinder 114, and the friction between the tensioning cylinder 110 and the circular inner cylinder 114 is greater than the sum of the spring force between the pull-up cylinder 130 and the limit knob 129 and the spring force between the relief slide bar 133 and the clamping circular plate 132.

The axial symmetry's fixed being provided with 2 pretension cylinder barrels 108 on the round seat 111 of rising, the fixed being provided with 2 piston rods 119 on the annular plate 128 of rising, piston rod 119 and pretension cylinder barrel 108 sliding fit, form airtight cavity between pretension cylinder barrel 108 and the piston rod 119, the fixed oil delivery pipe second 115 that is provided with on the pretension cylinder barrel 108, the airtight cavity intercommunication that oil delivery pipe second 115 and pretension cylinder barrel 108 and piston rod 119 formed is provided with oil delivery hose 107 between oil delivery pipe second 115 and the corresponding oil delivery pipe first 106.

When the second ring magnet 123 moves in a direction approaching the first ring magnet 122, under the action of the spring between the lifting cylinder 130 and the limit round block 129 and the spring between the yielding slide rod 133 and the clamping round plate 132, the lifting ring plate 128 cannot move, that is, the piston rod 119 cannot move, so that hydraulic oil cannot enter the sealed cavity formed by the piston rod 119 and the pre-tightening cylinder 108 from the second oil delivery pipe 115 through the oil delivery hose 107.

After the second ring magnet 123 contacts the first ring magnet 122, hydraulic oil is continuously introduced into the first oil delivery pipe 106, because the friction force between the tensioning cylinder 110 and the circular inner cylinder 114 is larger than the sum of the elastic force of the spring between the tensioning cylinder 130 and the limiting round block 129 and the elastic force of the spring between the yielding slide rod 133 and the clamping round plate 132, under the action of the friction force between the tensioning cylinder 110 and the circular inner cylinder 114, the hydraulic oil enters the two piston rods 119 and the pre-tightening cylinder 108 from the oil delivery hose 107 through the second oil delivery pipe 115 to form a closed cavity, the piston rods 119 are further moved in the direction away from the auxiliary ring plate 120, namely the lifting ring plate 128 is moved in the direction away from the auxiliary ring plate 120, the clamping round plate 132 is moved in the direction close to the lifting round plate 127, the annular pressing plate 131 is further moved in the direction close to the lifting round plate 127, the annular pressing plate 131 is contacted with the surface of the trapezoidal pressing plate 134, the spring between the trapezoidal pressing plate 134 and the tensioning cylinder 130 is compressed, and the trapezoidal pressing plate 134 is further moved in the direction close to the axis of the lifting cylinder 130, and the steel stranded wires in the clamping round plate 130 is fixed.

The lifting ring plate 128 continues to move towards the direction approaching to the lifting circular plate 127, if the steel strands clamped by the 4 trapezoidal pressing plates 134 on one of the lifting cylinders 130 are in a straightened state, namely springs between the yielding slide rods 133 and the clamping circular plate 132 are compressed, if the steel strands clamped by the 4 trapezoidal pressing plates 134 on one of the lifting cylinders 130 are in a loose state, namely springs between the lifting cylinder 130 and the lifting circular plate 127 are compressed, the lifting cylinder 130 moves towards the direction far from the auxiliary ring plate 120, further the clamping and fixing steel strands on the lifting cylinder 130 are straightened, finally the end face of the piston rod 119, which is contacted with the end face of the pre-tightening cylinder 108, cannot continue to move, and at the moment, the steel strands are in a straightened state.

Working principle: according to the number and distribution position of the steel strands to be lifted, a required lifting circular plate 127 is fixedly mounted on a lifting circular seat 111 through bolts, a plurality of lifting cylinders 130 are movably mounted on the lifting circular plate 127 through springs and limiting circular blocks 129, a required clamping circular plate 132 is fixedly mounted on the clamping circular plate 132 through bolts, a plurality of annular pressing plates 131 are arranged on the clamping circular plate 132, the axes of the annular pressing plates 131 and the axes of the corresponding lifting cylinders 130 are on the same straight line, the assembled lifting circular seat 111 is slidably mounted in a circular inner cylinder 114, the lifting circular seat 111 and the tensioning cylinder 110 are engaged, the axes of an auxiliary sliding rod II 125 and a slotted hole in the lifting circular seat 111, which is matched with the auxiliary sliding rod II 125, are on the same straight line, then the required circular anchor plate 113 is movably mounted in the circular inner cylinder 114, the axes of through holes in the circular anchor plate 113 and the axes of the corresponding annular pressing plates 131 are on the same straight line, and the axes of the auxiliary sliding rod I116 and the axes of the anchor plate II and the auxiliary sliding rod II are matched with the slotted hole 116 on the auxiliary sliding rod II.

Then hydraulic oil is introduced into a closed cavity formed by the circular outer cylinder 104, the circular inner cylinder 114 and the annular magnet II 123 through the oil delivery pipe I106, the auxiliary ring frame 103 and the fixed ring frame 105 synchronously move under the action of the transmission rod 118 and the circular magnet 121, so that the strip-shaped inclined groove plate I117 and the strip-shaped inclined groove plate II 126 synchronously move, the auxiliary slide rod I116 and the auxiliary slide rod II 125 move towards the direction close to the axis of the circular inner cylinder 114, namely the circular anchor plate 113 and the circular inner cylinder 114 are fixed, the round seat 111 and the tensioning cylinder 110 are fixed, the trapezoidal block 124 breaks away from the support of the auxiliary strip plate 112, the auxiliary strip plate 112 and the auxiliary ring frame 103 are contacted, and the position of the auxiliary ring frame 103 is limited, so that the auxiliary ring frame 103 cannot move freely.

The hoisting handle 102 is connected with the steel ropes, the position of the annular supporting plate 101 is conveniently adjusted, after the annular supporting plate 101 is moved to a designated position, steel strands to be pulled up pass through holes in the round anchor plate 113 and pass through the corresponding hoisting cylinder 130 and the hoisting cylinder 130 in a one-to-one correspondence mode, hydraulic oil is continuously introduced into the first oil delivery pipe 106, at the moment, the first annular magnet 122 is contacted with the second annular magnet 123 for adsorption fixation, under the action of friction force between the tensioning cylinder 110 and the round inner cylinder 114, hydraulic oil enters a closed cavity formed by a piston rod 119 and a pre-tightening cylinder 108 along the oil delivery hose 107 through the second oil delivery pipe 115, even if the piston rod 119 moves, the hoisting ring plate 128 moves, the annular pressing plate 131 moves towards the direction close to the hoisting circular plate 127, the trapezoidal pressing plate 134 is compressed by a spring between the trapezoidal pressing plate 134 and the hoisting cylinder 130, at the moment, the trapezoidal pressing plate 134 moves towards the direction close to the steel strands, the trapezoidal pressing plate 134 is finally clamped and the trapezoidal pressing plate 134 cannot move continuously, the trapezoidal pressing plate 134 is kept away from the trapezoidal pressing plate, and if the trapezoidal pressing plate is clamped by the trapezoidal pressing plate 130, and the trapezoidal pressing plate is kept in the direction between the hoisting ring plate and the annular pressing plate 130 is compressed, and the trapezoidal pressing plate is kept in the state, and the stretching plate is kept between the cylindrical pressing plate and the cylindrical plate is kept in the stretching state, and the stranded wire is kept under the tension, and the stranded wire is kept in the tension.

Finally, the end face of the piston rod 119 is in contact with the end face of the pre-tightening cylinder 108 and cannot move continuously, at the moment, the steel strands are in a straight state, hydraulic oil is continuously injected into the oil delivery pipe I106, at the moment, the piston rod 119 cannot move continuously, namely the annular magnet II 123 moves continuously, the tensioning cylinder 110 moves, the end face of the piston rod 119 is in contact with the end face of the pre-tightening cylinder 108 and cannot move continuously, and at the moment, the steel strands are tensioned.

When the tensioning cylinder 110 moves to the position farthest from the first oil delivery pipe 106, the hydraulic oil in the tensioning cylinder 110 and the piston rod 119 return to the initial positions through the first oil delivery pipe 106, and the steps are repeated to continuously tension the steel strands.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the present invention without inventive labor, as those skilled in the art will recognize from the above-described concepts.

Claims (9)

1. The utility model provides a steel strand wires jack with pretension function, includes annular support plate (101), and fixed mounting has hoist and mount handle (102), its characterized in that on annular support plate (101):

the annular supporting plate (101) is internally provided with a lifting assembly, the lifting assembly comprises a circular outer cylinder barrel (104), a circular inner cylinder barrel (114) is fixedly arranged in the circular outer cylinder barrel (104), a tensioning cylinder barrel (110) and a second annular magnet (123) are slidably arranged on the circular inner cylinder barrel (114), a first annular magnet (122) is fixedly arranged on the end face of the tensioning cylinder barrel (110), a lifting round seat (111) is movably arranged on the tensioning cylinder barrel (110), and an auxiliary annular plate (120) is fixedly arranged on the lifting round seat (111);

be provided with auxiliary assembly and fixed subassembly in annular backup pad (101), auxiliary assembly includes circular ground tackle board (113), be provided with a plurality of through-holes with steel strand wires complex on circular ground tackle board (113), even slidable mounting has 4 supplementary slide bars one (116) on circular ground tackle board (113) and circular ground tackle board (114) joint time sliding fit, be provided with 4 slotted holes with supplementary slide bar one (116) complex on circular ground tackle board (113), supplementary slide bar one (116) are used for making circular ground tackle board (113) and circular ground tackle board (114) fixed connection, fixed subassembly includes lifting round plate (127), lifting round plate (127) and lifting round seat (111) swing joint, sliding mounting has a plurality of lifting cylinders (130) on the lifting round plate (127), sliding mounting has lifting ring plate (128) on the lifting ring plate (128) activity is provided with centre gripping round plate (132), the activity is provided with a plurality of annular press plates (131) on centre gripping round plate (132), lifting round plate (130) are provided with trapezoidal press plate (134) slidable mounting of sliding, make steel strand wires according to trapezoidal press (134) all.

2. The steel strand jack with a pre-tightening function according to claim 1, wherein: the circular outer cylinder (104) is fixedly arranged in the annular supporting plate (101), the circular outer cylinder (104), the tensioning cylinder (110), the circular inner cylinder (114), the first annular magnet (122) and the second annular magnet (123) are all on the same straight line, a closed cavity is formed between the circular outer cylinder (104), the circular inner cylinder (114) and the second annular magnet (123), an oil pipeline I (106) and an exhaust pipe (109) are fixedly arranged on the circular outer cylinder (104) in an axisymmetric manner, the oil pipeline I (106) is communicated with the closed cavity formed by the circular outer cylinder (104), the circular inner cylinder (114) and the second annular magnet (123), the closed cavity is formed between the circular outer cylinder (104), the tensioning cylinder (110), the circular inner cylinder (114), the first annular magnet (122) and the second annular magnet (123), and the exhaust pipe (109) is communicated with the closed cavity formed by the circular outer cylinder (104), the tensioning cylinder (110), the circular inner cylinder (114), the first annular magnet (122) and the second annular magnet (123).

3. The steel strand jack with a pre-tightening function according to claim 2, wherein: the auxiliary assembly comprises an auxiliary ring frame (103) which is slidably mounted on a circular outer cylinder barrel (104), 4 circular magnets (121) are fixedly arranged on the auxiliary ring frame (103), 4 circular grooves matched with the circular magnets (121) are formed in the second annular magnets (123), 4 strip-shaped chute plates I (117) are uniformly fixedly arranged on the auxiliary ring frame (103), short rods are fixedly arranged on the side faces of the first auxiliary slide rod (116), and the short rods on the side faces of the first auxiliary slide rod (116) are movably connected with the first strip-shaped chute plates (117).

4. A steel strand jack with a pretensioning function according to claim 3, characterized in that: the circular outer cylinder (104) is evenly provided with 4 auxiliary slats (112) in a sliding mode, springs are arranged between the auxiliary slats (112) and the circular outer cylinder (104), grooves matched with the auxiliary ring frames (103) are formed in the end portions of the auxiliary slats (112), 4 trapezoid blocks (124) are evenly and fixedly arranged on the tensioning cylinder (110), and the trapezoid blocks (124) are used for pushing the auxiliary slats (112) to move.

5. The steel strand jack with a pre-tightening function according to claim 4, wherein: the fixing assembly further comprises a fixing ring frame (105) and a plurality of limiting round blocks (129), the fixing ring frame (105) is slidably mounted on the tensioning cylinder barrel (110), 4 transmission rods (118) are uniformly and fixedly arranged on the fixing ring frame (105), the transmission rods (118) are fixedly connected with the annular magnet II (123), 4 auxiliary slide rods II (125) are uniformly and slidably mounted on the tensioning cylinder barrel (110), 4 slotted holes matched with the auxiliary slide rods II (125) are formed in the lifting round seat (111), short rods are arranged on the side faces of the auxiliary slide rods II (125), 4 strip-shaped inclined groove plates II (126) are fixedly arranged on the fixing ring frame (105), and the short rods on the side faces of the auxiliary slide rods II (125) are movably connected with the corresponding strip-shaped inclined groove plates II (126).

6. The steel strand jack with a pre-tightening function according to claim 5, wherein: the transmission rod (118) is in sliding fit with the circular outer cylinder barrel (104), the transmission rod (118) is in sliding fit with the tensioning cylinder barrel (110), 4 bolts are arranged between the lifting round seat (111) and the lifting round plate (127), the lifting round seat (111) and the lifting round plate (127) are fixedly connected through the bolts, 4 bolts are arranged between the lifting ring plate (128) and the clamping round plate (132), and the lifting ring plate (128) and the clamping round plate (132) are fixedly connected through the bolts.

7. The steel strand jack with a pre-tightening function according to claim 6, wherein: the end of the lifting cylinder (130) is provided with threads, the limiting round block (129) is in threaded fit with the corresponding lifting cylinder (130), the lifting round plate (127) and the lifting cylinder (130) are limited in position through the limiting round block (129), a spring is arranged between the lifting cylinder (130) and the lifting round plate (127), the annular pressing plate (131) is symmetrically and fixedly provided with a yielding slide rod (133), a spring is arranged between the yielding slide rod (133) and the clamping round plate (132), and a spring is arranged between the trapezoidal pressing plate (134) and the lifting cylinder (130).

8. The steel strand jack with a pre-tightening function according to claim 7, wherein: the oil delivery hose comprises a lifting round seat (111), wherein 2 pre-tightening cylinders (108) are fixedly arranged on the lifting round seat (111) in an axisymmetric manner, 2 piston rods (119) are fixedly arranged on a lifting annular plate (128) in an axisymmetric manner, the piston rods (119) are in sliding fit with the pre-tightening cylinders (108), a closed cavity is formed between the pre-tightening cylinders (108) and the piston rods (119), an oil delivery pipe II (115) is fixedly arranged on the pre-tightening cylinders (108), the oil delivery pipe II (115) is communicated with the closed cavity formed by the pre-tightening cylinders (108) and the piston rods (119), and an oil delivery hose (107) is arranged between the oil delivery pipe II (115) and the corresponding oil delivery pipe I (106).

9. The steel strand jack with a pre-tightening function according to claim 8, wherein: friction force exists between the tensioning cylinder barrel (110) and the circular inner cylinder barrel (114), and the friction force between the tensioning cylinder barrel (110) and the circular inner cylinder barrel (114) is larger than the sum of the elastic force of the spring between the pulling cylinder (130) and the limiting round block (129) and the elastic force of the spring between the yielding slide rod (133) and the clamping circular plate (132).