CN114717966B - Bridge prestress device and bridge prestress construction method - Google Patents
Bridge prestress device and bridge prestress construction method Download PDFInfo
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- CN114717966B CN114717966B CN202210486021.3A CN202210486021A CN114717966B CN 114717966 B CN114717966 B CN 114717966B CN 202210486021 A CN202210486021 A CN 202210486021A CN 114717966 B CN114717966 B CN 114717966B
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- 238000010276 construction Methods 0.000 title abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Bridges Or Land Bridges (AREA)
- Transmission Devices (AREA)
Abstract
The application discloses a bridge prestress device and a bridge prestress construction method, which belong to the field of bridge prestress, and comprise a bottom plate, a supporting rod fixed on the top surface of the bottom plate and a top plate fixed on the top end of the supporting rod, wherein moving wheels are arranged at corners of the bottom surface of the bottom plate, a screw is rotatably arranged on the top surface of the bottom plate, a moving plate which moves vertically is sleeved on the periphery of the screw, the moving plate is in spiral transmission fit with the screw, and a driving assembly for driving the screw to rotate is arranged on the top plate; the connecting plate that slides along self length direction is installed to the top surface of movable plate, and the installation piece that removes along movable plate width direction is installed to the top surface of connecting plate, and the mounting groove that is used for placing the jack is offered to the top surface of installation piece, and the mounting groove runs through the installation piece setting along the width direction of movable plate. The application has the advantages of labor saving and higher construction efficiency.
Description
Technical Field
The application relates to the field of bridge prestress, in particular to a bridge prestress device and a bridge prestress construction method.
Background
The prestress tensioning is to apply prestress to the steel strands in the tensioning module before the engineering structural member bears external load, so as to improve the bending resistance and rigidity of the member, delay the occurrence time of cracks and increase the durability of the member.
The Chinese patent publication No. CN213978620U discloses a supporting device for a prestress tensioning jack of a continuous bridge end, which comprises a supporting frame, a base plate detachably arranged on the continuous bridge, an upright post vertically arranged on the base plate and a cantilever beam connected with the upright post, wherein one end of the cantilever beam far away from the upright post extends to the outer side of the continuous bridge, and the top of the cantilever beam is provided with a chute; the roller assembly is arranged in the chute in a sliding way; and a chain block having an upper end mounted to the roller assembly and a lower end for lifting the tensioning jack.
For the above-described related art, the inventors consider that: the existing prestress tensioning device usually uses a chain block to hoist a jack, but in the construction process, a constructor is required to pull the chain block, other constructors are required to operate the jack, and the jack can be installed only under the cooperative work of a plurality of constructors, so that the construction efficiency is low.
Disclosure of Invention
In order to solve the problem of low construction efficiency of the existing prestress tensioning device, the application provides a bridge prestress device and a bridge prestress construction method.
In a first aspect, the bridge prestress device and the bridge prestress construction method provided by the application adopt the following technical schemes:
The bridge prestress device comprises a bottom plate, a supporting rod fixed on the top surface of the bottom plate and a top plate fixed on the top end of the supporting rod, wherein moving wheels are arranged at corners of the bottom surface of the bottom plate, a screw is rotatably arranged on the top surface of the bottom plate, a moving plate which moves vertically is sleeved on the periphery of the screw, the moving plate is in spiral transmission fit with the screw, and a driving assembly for driving the screw to rotate is arranged on the top plate; the connecting plate that slides along self length direction is installed to the top surface of movable plate, follow is installed to the top surface of connecting plate the installation piece that movable plate width direction removed, the mounting groove that is used for placing the jack is seted up to the top surface of installation piece, the mounting groove is followed the width direction of movable plate runs through the installation piece sets up.
By adopting the technical scheme, the bottom plate is moved to the vicinity of the bridge, the screw rod rotates under the action of the driving assembly, and the moving plate is vertically moved, so that the jack is moved to the height of the steel strand to be tensioned; moving the connecting plate to enable the jack to move to a position coaxial with the steel strand to be tensioned; and then the installation block is moved, so that the jack moves towards the direction close to the steel strand, the steel strand is tensioned, only one constructor is required to complete the installation of the jack, the labor is saved, the construction efficiency is higher, and the safety coefficient is higher.
Preferably, the driving assembly comprises a first bevel gear sleeved and fixed on the outer peripheral surface of the screw, a rotating rod is slidably arranged on the top surface of the top plate along the width direction of the moving plate, a second bevel gear and a third bevel gear are sleeved and fixed on the outer peripheral surface of the rotating rod, the second bevel gear and the third bevel gear are oppositely arranged, the first bevel gear can be meshed with the second bevel gear or the third bevel gear, and a rotating assembly used for driving the rotating rod to rotate is arranged in the top plate.
By adopting the technical scheme, the rotating assembly drives the rotating rod to rotate, the rotating rod drives the bevel gear II and the bevel gear III to rotate, the rotating rod is moved, the bevel gear II is meshed with the bevel gear I, at the moment, the bevel gear III is separated from the bevel gear I, and the screw drives the moving plate to move upwards; when the third bevel gear is meshed with the first bevel gear, the second bevel gear is separated from the first bevel gear, and the screw drives the moving plate to move downwards; when the first bevel gear is separated from the second bevel gear and the third bevel gear, the screw stops rotating, and the moving plate stops moving.
Preferably, the rotating assembly comprises a motor fixed on the top surface of the top plate, a rotating block is fixed on an output shaft of the motor, a rectangular groove is formed in the rotating block, the rotating block slides along the width direction of the moving plate through the rectangular groove, a synchronizing block is installed on the rotating block in a sliding mode, the side face of the synchronizing block, which is far away from the motor, is close to one end of the rotating rod, which is close to the motor, is fixedly connected with a first spring, which is far away from one end of the synchronizing block, which is close to the side face of the motor, is fixedly connected with the rectangular groove.
Through adopting above-mentioned technical scheme, the motor drives the rotating block and rotates, and the rotating block drives the synchronizing block and rotates, and synchronizing block wind drives the dwang and rotates, under the elasticity effect of spring one, bevel gear two keeps the meshing state with bevel gear one to make the movable plate upwards move.
Preferably, the top surface of movable plate has seted up recess one, wear to have equipped with the push rod in the recess one, the push rod passes through recess one is followed the width direction of movable plate with the movable plate slides and is connected, the ring channel has been seted up to the outer peripheral face of dwang, recess two has been seted up to the top surface of bottom plate, recess three has been seted up to the top surface of roof, the bottom of push rod is inserted and is established in the recess two, the top of push rod passes the recess is inserted in the ring channel in the lump.
Through adopting above-mentioned technical scheme, remove the push rod, make the dwang move towards the direction that is close to the motor, can make bevel gear two and bevel gear one separate, bevel gear three and bevel gear one mesh to make the movable plate move down, so that the staff adjusts the height position of movable plate.
Preferably, a cavity is formed in the moving plate, a rotating cylinder is rotationally arranged in the cavity and is in screw transmission fit with the screw rod, a clamping groove is formed in the outer peripheral surface of the rotating cylinder, a positioning groove is formed in the inner peripheral surface of the cavity, the moving plate slides along the length direction of the moving plate through the positioning groove, a positioning block capable of being inserted in the clamping groove is installed, a second spring is fixed on the side surface, away from the rotating cylinder, of the positioning block, and one end, away from the positioning block, of the second spring is fixedly connected with the moving plate.
By adopting the technical scheme, when the positioning block is inserted into the clamping groove, the moving plate and the rotating cylinder keep synchronous movement, and the moving plate moves up and down under the drive of the screw rod; when the moving plate rises and moves to the height corresponding to the steel strand to be tensioned, the positioning block is separated from the clamping groove, and the rotating cylinder rotates along with the screw rod, so that the moving plate can stop moving under the state that the screw rod keeps rotating.
Preferably, the brake lever of vertical setting is installed to the inboard rotation, the outer peripheral face cover of brake lever is established and is fixed with rotation wheel and ratchet, rotation wheel's outer peripheral face is fixed with and connects rope one, connect rope one keep away from rotation wheel's one end with the locating piece is kept away from rotation cylindrical side fixed connection, the inboard rotation install can with ratchet looks joint's pawl, the pawl is kept away from the side of ratchet is fixed with the spring three, the spring three keep away from the one end of pawl with the inboard fixed connection.
By adopting the technical scheme, when the movable plate moves to the height corresponding to the steel strand to be tensioned, the brake rod is rotated, the brake rod drives the rotating wheel to rotate, the rotating wheel drives the positioning block to be separated from the clamping groove through the connecting rope, the movable plate stops moving, and meanwhile, the pawl is inserted into the tooth slot of the ratchet wheel; when the moving plate needs to move again, the pawl is moved and separated from the ratchet, and the pull rope is loosened, so that the positioning block enters the clamping groove under the action of the elastic force of the second spring.
Preferably, the top surface of movable plate has seted up two spouts one, the bottom surface rotation of connecting plate is installed in gyro wheel one, gyro wheel one passes through spout one is followed the length direction of movable plate removes, the top surface of movable plate has seted up through-hole one and through-hole two, the through-hole one is located spout one is close to rotate cylinder one side, the through-hole two is located spout one is kept away from rotate cylinder one side, be provided with in the movable plate with through-hole one with through-hole three of two all intercommunication of through-hole, the connecting plate is close to rotate cylinder's side and be fixed with the stay cord one, the other end of stay cord one pass through-hole one in proper order, through-hole three and through-hole two with the connecting plate is kept away from rotate cylinder's side fixed connection, set up in the movable plate with the spread groove that the through-hole is linked together, the movable plate passes through the spread groove is followed self width direction and is slided and is installed the connecting block, the top surface of connecting block has been seted up and is used for wearing to establish the connecting through-hole one, be close to rotate the side fixed connection rope of wheel with the through-hole one with the connecting block two is kept away from four connecting blocks of connecting block, four outer peripheral surfaces are kept away from to rotate the connecting block.
Through adopting above-mentioned technical scheme, the in-process that the movable plate moved up removes the connecting plate, adjusts the transverse position of jack, and when the movable plate moved to corresponding height, rotated the brake lever, when the movable plate stopped moving, the connecting block was moved towards the direction that is close to the rotor wheel under the pulling force effect of connecting rope two for stay cord one card is in the spread groove, and the connecting plate is difficult for taking place to remove, so that the staff carries out the installation of jack.
Preferably, the mounting block is provided with a bearing block through the mounting groove in a sliding manner along the vertical direction, the top surface of the bearing block is provided with an intrados surface, and the bottom surface of the bearing block is fixed with a spring five.
Through adopting above-mentioned technical scheme, place the jack at the top surface of carrier block, the outer peripheral surface and the intrados of jack are laminated mutually, and the spring five plays buffering cushioning's effect.
Preferably, a pressing block is slidably arranged in the mounting block along the length direction of the moving plate, a first reset block is fixed on the bottom surface of the pressing block, a spring six is fixed on the side surface of the first reset block, which is far away from the bearing block, and one end of the spring six, which is far away from the first reset block, is fixedly connected with the mounting block; the two sides of the bottom surface of the bearing block are provided with first inclined surfaces, and the side surface, close to the bearing block, of the pressing block is provided with second inclined surfaces for being abutted against the first inclined surfaces; a driving block is vertically slidably installed in the installation block, inclined planes III are formed in the side surfaces, close to each other, of the driving block and the pressing block, reset blocks II are fixed on two sides of the driving block, a spring seven is fixed on the top surface of the reset blocks II, and the top end of the spring seven is fixedly connected with the installation block; the top surface of the mounting block is slidably provided with a clamping plate along the length direction of the moving plate, the side surface of the clamping plate, which is far away from the bearing block, is fixedly provided with a pushing block, the side surface of the pushing block, which is far away from the bearing block, is fixedly provided with a spring eight, and the side surface of the spring eight, which is far away from the pushing block, is fixedly connected with the mounting block; the side of drive piece has been seted up and is used for wearing to establish the drive through groove of drive piece, the interior top surface of drive through groove is fixed with the joint piece, the top surface of drive piece has been seted up and is used for inserting establish the joint groove of joint piece.
Through adopting above-mentioned technical scheme, place the jack on the carrier block, the carrier block moves down, through inclined plane one with inclined plane two looks butt, the carrier block promotes to support the briquetting and moves towards the direction of keeping away from the carrier block, it pushes the drive block through three on inclined plane to reciprocate to support the briquetting, the joint piece breaks away from the joint groove, the promotion piece is moved towards the direction that is close to the carrier block under the elasticity effect of spring eight, the promotion piece drives grip block synchronous motion for the outer back looks butt of grip block and jack, thereby guarantee the stability of jack.
In a second aspect, the application provides a construction method of a bridge prestress device, which adopts the following technical scheme: the method comprises the following steps:
The bottom plate is moved to the vicinity of the bridge, the motor is started, the moving plate moves upwards, the position of the connecting plate is adjusted at the same time, when the jack and the steel strand to be tensioned are coaxially arranged, the brake rod is rotated, and the moving plate and the connecting plate stop moving; and moving the mounting block to enable the jack to move towards the direction close to the steel strand to be tensioned, and mounting the jack.
Through adopting above-mentioned technical scheme, constructor can align and install the jack alone, uses manpower sparingly, and the efficiency of construction is higher.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the bottom plate is moved to the vicinity of the bridge, the screw rod rotates under the action of the driving assembly, and the moving plate moves vertically, so that the jack moves to the height of the steel strand to be tensioned; moving the connecting plate to enable the jack to move to a position coaxial with the steel strand to be tensioned; the installation block is moved, so that the jack moves towards the direction close to the steel strand, the steel strand is tensioned, the installation of the jack can be completed by only one constructor, the construction efficiency is high, and the safety coefficient is high;
2. The rotating assembly drives the rotating rod to rotate, the rotating rod drives the bevel gear II and the bevel gear III to rotate, the rotating rod is moved, the bevel gear II is meshed with the bevel gear I, at the moment, the bevel gear III is separated from the bevel gear I, and the screw drives the moving plate to move upwards; when the third bevel gear is meshed with the first bevel gear, the second bevel gear is separated from the first bevel gear, and the screw drives the moving plate to move downwards; when the first bevel gear is separated from the second bevel gear and the third bevel gear, the screw stops rotating, and the moving plate stops moving;
3. In the process of upward movement of the movable plate, the connecting plate is moved, the transverse position of the jack is adjusted, when the movable plate moves to the corresponding height, the brake rod is rotated, the movable plate stops moving, and the connecting block moves towards the direction close to the rotating wheel under the action of the pulling force of the connecting rope II, so that the first pull rope is clamped in the connecting groove, the connecting plate is not easy to move, and the jack is convenient to install by workers.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present application.
Fig. 2 is a schematic view of the structure of the moving plate, the connecting plate and the mounting block in the embodiment of the present application.
Fig. 3 is a cross-sectional view of a moving plate in an embodiment of the present application.
Fig. 4 is an enlarged schematic view at a in fig. 3.
Fig. 5 is a schematic view of the structure of the screw and the rotating cylinder in the embodiment of the present application.
Fig. 6 is a schematic view of the structure of the top plate in the embodiment of the present application.
Fig. 7 is a cross-sectional view of a mounting block in an embodiment of the application.
Fig. 8 is a schematic diagram of the structure of the driving block and the pushing block in the embodiment of the present application.
Reference numerals: 1. a bottom plate; 11. a support rod; 12. a top plate; 13. a moving wheel; 14. a screw; 15. bevel gears I; 2. a moving plate; 21. a cavity; 22. rotating the cylinder; 23. a positioning groove; 24. a positioning block; 25. a clamping groove; 26. a second spring; 27. a first chute; 28. a first limit groove; 3. a fixed block; 31. a rotary through hole; 32. a rotating lever; 33. bevel gears II; 34. bevel gears III; 35. a motor; 36. a rotating block; 37. rectangular grooves; 38. a synchronization block; 39. a first spring; 4. a push rod; 41. a groove I; 42. a second groove; 43. a groove III; 44. a limiting plate; 45. an annular groove; 5. a connecting plate; 51. a roller I; 52. a first limit roller; 53. a second chute; 54. a limiting groove II; 55. a first pull rope; 56. a first through hole; 57. a second through hole; 58. a third through hole; 6. a connecting block; 61. a connecting groove; 62. a connecting through hole; 63. a spring IV; 64. a brake lever; 65. a control groove; 66. rotating the circular plate; 67. a second roller; 68. a second limit roller; 7. a ratchet wheel; 71. a pawl; 72. a reset lever; 73. resetting the circular plate; 74. an abutment block; 75. a third spring; 76. a rotating wheel; 77. a first connecting rope; 78. a second connecting rope; 8. a mounting block; 81. a mounting groove; 82. a bearing block; 821. an inclined plane I; 83. a spring V; 84. pressing blocks; 841. a second inclined plane; 85. pressing the groove; 86. a reset block I; 87. resetting the first groove; 88. a spring six; 89. an inclined plane III; 9. a driving block; 91. a driving groove; 92. driving the through groove; 93. a clamping block; 94. a reset block II; 941. a spring seven; 95. a clamping plate; 96. a clamping groove; 97. a pushing block; 971. a clamping groove; 98. a pushing groove; 99. and a spring eight.
Detailed Description
The application is described in further detail below with reference to fig. 1-8.
The embodiment of the application discloses a bridge prestress device and a bridge prestress construction method. Referring to fig. 1, the bridge prestress device comprises a bottom plate 1, movable wheels 13 are mounted at corners of the bottom surface of the bottom plate 1, a vertically arranged supporting rod 11 is fixed on the top surface of the bottom plate 1, and a top plate 12 is fixed on the top end of the supporting rod 11. A screw 14 which is vertically arranged is rotatably arranged between the bottom plate 1 and the top plate 12, a movable plate 2 is sleeved on the periphery of the screw 14, and a supporting rod 11 penetrates through the movable plate 2.
Referring to fig. 1 and 2, a connection plate 5 is installed on the top surface of the moving plate 2, first rollers 51 are installed at corners of the bottom surface of the connection plate 5, two first sliding grooves 27 are formed in the top surface of the moving plate 2, and the first rollers 51 move along the length direction of the moving plate 2 through the first sliding grooves 27. The first limiting rollers 52 are fixed on two sides of the first roller 51, the first limiting grooves 28 are formed in the inner sides of the first sliding grooves 27, and the first limiting rollers 52 move along the length direction of the moving plate 2 through the first limiting grooves 28, so that the first roller 51 is not easy to separate from the moving plate 2. The installation piece 8 is installed to the top surface of connecting plate 5, and gyro wheel two 67 is all installed to the bottom surface corner of installation piece 8, and two spout two 53 have been seted up to the top surface of connecting plate 5, and gyro wheel two 67 moves along the width direction of movable plate 2 through spout two 53. Limiting rollers II 68 are fixed on two sides of the roller II 67, limiting grooves II 54 are formed in the inner sides of the sliding grooves II 53, and the limiting rollers II 68 move along the width direction of the moving plate 2 through the limiting grooves II 54, so that the roller II 67 is not easy to separate from the connecting plate 5.
Referring to fig. 3 and 4, the top surface of the moving plate 2 is provided with two first through holes 56 and two second through holes 57, the first through holes 56 are positioned on one side of the first sliding groove 27 close to the screw 14, and the second through holes 57 are positioned on one side of the first sliding groove 27 far away from the rotating cylinder 22. A third through hole 58 is provided in the moving plate 2, and communicates with both the first through hole 56 and the second through hole 57. Two first pull ropes 55 are fixed on the side surface, close to the screw 14, of the connecting plate 5, and the other end of the first pull rope 55 sequentially penetrates through the first through hole 56, the third through hole 58 and the second through hole 57 and is fixedly connected with the side surface, far away from the screw 14, of the connecting plate 5. A connecting groove 61 communicated with the first through hole 56 is formed in the movable plate 2, the movable plate 2 is slidably provided with a connecting block 6 along the width direction of the movable plate through the connecting groove 61, and a connecting through hole 62 for penetrating the first pull rope 55 is formed in the top surface of the connecting block 6. The sides of the two connecting blocks 6, which are far away from each other, are respectively fixed with a spring four 63, and one end of the spring four 63, which is far away from the connecting blocks 6, is fixedly connected with the movable plate 2 through a connecting groove 61.
Referring to fig. 4 and 5, a cavity 21 is provided in the moving plate 2, a rotating cylinder 22 is rotatably installed in the cavity 21, and the rotating cylinder 22 is in screw driving engagement with the screw 14. The outer peripheral surface of the rotary cylinder 22 is provided with a clamping groove 25, the inner peripheral surface of the cavity 21 is provided with a positioning groove 23, and the movable plate 2 is slidably provided with a positioning block 24 which can be inserted into the clamping groove 25 along the length direction of the movable plate through the positioning groove 23. The side surface of the positioning block 24, which is far away from the rotating cylinder 22, is fixed with a second spring 26, and one end of the second spring 26, which is far away from the positioning block 24, is fixedly connected with the side surface of the positioning groove 23, which is far away from the rotating cylinder 22.
Referring to fig. 4, a control groove 65 is provided in the moving plate 2, a brake lever 64 provided vertically is rotatably installed in the control groove 65, and a rotary circular plate 66 is fixed to the top end of the brake lever 64 passing through the top surface of the moving plate 2. The outer peripheral surface of the brake lever 64 is sleeved and fixed with a rotating wheel 76 and a ratchet wheel 7, the outer peripheral surface of the rotating wheel 76 is fixed with a first connecting rope 77 and two second connecting ropes 78, one end of the first connecting rope 77 away from the rotating wheel 76 is fixedly connected with the side surface of the positioning block 24 away from the rotating cylinder 22, and one end of the second connecting rope 78 away from the rotating wheel 76 is fixedly connected with the side surface of the connecting block 6 close to the rotating wheel 76. A pawl 71 is rotatably installed in the control groove 65, a reset lever 72 is fixed to the top surface of the pawl 71, and a reset circular plate 73 is fixed to the top end of the reset lever 72 penetrating through the top surface of the moving plate 2. An abutting block 74 is fixed on the inner top surface of the control groove 65, a third spring 75 is fixed on the side surface of the abutting block 74, which is close to the pawl 71, one end of the third spring 75, which is far away from the abutting block 74, is fixedly connected with the side surface of the pawl 71, and the pawl 71 moves towards the direction, which is close to the ratchet 7, under the action of the elastic force of the third spring 75 and is inserted into a tooth groove of the ratchet 7.
Referring to fig. 1 and 6, a fixing block 3 is fixed to the top surface of the top plate 12, a rotation through hole 31 is formed in a side surface of the fixing block 3, a rotation lever 32 is inserted into the rotation through hole 31, and the rotation lever 32 is movable in the width direction of the movable plate 2. The outer peripheral surface of the screw 14 is sleeved and fixed with a first bevel gear 15, the outer peripheral surface of the rotating rod 32 is sleeved and fixed with a second bevel gear 33 and a third bevel gear 34, the second bevel gear 33 and the third bevel gear 34 are oppositely arranged, and the second bevel gear 33 is positioned on one side of the third bevel gear 34 close to the motor 35. A motor 35 is fixed on the top surface of the top plate 12, a rotating block 36 is fixed on an output shaft of the motor 35, a rectangular groove 37 is arranged in the rotating block 36, and a synchronizing block 38 is slidably arranged on the rotating block 36 along the width direction of the movable plate 2 through the rectangular groove 37. The side of the synchronizing block 38, which is close to the motor 35, is fixed with a first spring 39, and one end of the first spring 39, which is far away from the synchronizing block 38, is fixedly connected with the side of the synchronizing groove, which is close to the motor 35. The side of the rotating block 36, which is far away from the motor 35, is provided with a carry slot, and one end of the rotating rod 32, which is close to the motor 35, passes through the carry slot and is fixedly connected with the side of the synchronizing block 38, which is far away from the motor 35. The motor 35 drives the rotating block 36 to rotate, the rotating block 36 drives the synchronizing block 38 to rotate, the synchronizing block 38 drives the rotating rod 32 to rotate, the rotating rod 32 drives the bevel gear II 33 and the bevel gear III 34 to rotate, when the bevel gear II 33 is meshed with the bevel gear I15, the bevel gear III 34 is separated from the bevel gear I15, the bevel gear II 33 drives the screw 14 to rotate, and the moving plate 2 moves upwards.
Referring to fig. 1 and 6, the top surface of the moving plate 2 is provided with a groove one 41, a push rod 4 is penetrated into the groove one 41, and the push rod 4 moves along the width direction of the moving plate 2 through the groove one 41. The top surface of the bottom plate 1 is provided with a second groove 42, the top surface of the top plate 12 is provided with a third groove 43, the bottom end of the push rod 4 is inserted into the second groove 42, and the top end of the push rod 4 passes through the third groove 43. The outside face of push rod 4 is fixed with limiting plate 44, and the bottom surface of limiting plate 44 is laminated with the top surface of roof 12. The outer peripheral surface of the rotating rod 32 is provided with an annular groove 45, and the top end of the push rod 4 is inserted into the annular groove 45. And the push rod 4 is moved to separate the bevel gear II 33 from the bevel gear I15, meanwhile, the bevel gear III 34 is meshed with the bevel gear I15, the bevel gear III 34 drives the screw 14 to rotate, and the moving plate 2 moves downwards.
Referring to fig. 1 and 7, a mounting groove 81 is provided in the top surface of the mounting block 8, and the mounting groove 81 is provided to penetrate the mounting block 8 in the width direction of the moving plate 2. The mounting block 8 is provided with a bearing block 82 in a vertically sliding manner through the mounting groove 81, and the top surface of the bearing block 82 is set to be an intrados surface. The bottom surface of the bearing block 82 is fixed with a spring five 83, and the bottom end of the spring five 83 is fixedly connected with the bottom surface of the mounting groove 81. The opposite inner sides of the mounting blocks 8 are provided with pressing grooves 85, and the mounting blocks 8 are slidably provided with pressing blocks 84 along the length direction of the moving plate 2 through the pressing grooves 85. The bottom surface of the pressing block 84 is fixed with a first reset block 86, the bottom surface of the pressing groove 85 is provided with a first reset groove 87, and the first reset block 86 is connected with the mounting block 8 in a sliding manner along the length direction of the moving plate 2 through the first reset groove 87. The side surface of the reset block I86, which is far away from the bearing block 82, is fixedly provided with a spring six 88, and one end of the spring six 88, which is far away from the reset block I86, is fixedly connected with the side surface of the reset groove I87, which is far away from the bearing block 82. The two sides of the bottom surface of the bearing block 82 are respectively provided with a first inclined surface 821, and the side surface, close to the bearing block 82, of the pressing block 84 is provided with a second inclined surface 841 for being abutted against the first inclined surface 821.
Referring to fig. 7 and 8, a driving groove 91 communicating with the pressing groove 85 is formed in the top surface of the mounting block 8, the mounting block 8 is provided with a driving block 9 by sliding the driving groove 91 vertically, and inclined surfaces three 89 are formed on the sides, close to each other, of the driving block 9 and the pressing block 84. The two sides of the driving block 9 are respectively fixed with a reset block 94, the two sides of the driving groove 91 are respectively provided with a reset groove two, and the reset blocks 94 are vertically connected with the mounting blocks 8 in a sliding manner through the reset grooves two. The top surface of the reset block II 94 is fixed with a spring seven 941, and the top end of the spring seven 941 is fixedly connected with the top surface of the reset groove II.
Referring to fig. 7 and 8, a clamping groove 96 is provided on the top surface of the mounting block 8, and the mounting block 8 is slidably mounted with a clamping plate 95 in the width direction thereof through the clamping groove 96. The side of the holding groove 96 away from the carrier block 82 is provided with a pushing groove 98, and the mounting block 8 is slidably mounted with a pushing block 97 in the width direction thereof through the pushing groove 98. The side of the pushing block 97, which is close to the bearing block 82, is fixedly connected with the side of the clamping plate 95, which is far away from the bearing block 82, and the side of the pushing block 97, which is far away from the bearing block 82, is fixedly provided with a spring eight 99, and the side of the spring eight 99, which is far away from the pushing block 97, is fixedly connected with the side of the pushing groove 98, which is far away from the bearing block 82. The side of the driving block 9 is provided with a driving through groove 92 for penetrating the pushing block 97, the inner top surface of the driving through groove 92 is fixed with a clamping block 93, and the top surface of the pushing block 97 is provided with a clamping groove 971 for inserting the clamping block 93.
The implementation principle of the bridge prestress device and the bridge prestress construction method provided by the embodiment of the application is as follows: the base plate 1 is moved to the vicinity of a bridge, the motor 35 is started, the bevel gear II 33 is meshed with the bevel gear I15, the screw 14 rotates, the moving plate 2 moves upwards, so that the jack moves to the height of the steel strand to be tensioned, meanwhile, the connecting plate 5 is moved, the jack moves to a position coaxial with the steel strand to be tensioned, the rotating circular plate 66 is rotated, the ratchet wheel 7 and the rotating wheel 76 are rotated, the connecting rope I77 drives the positioning block 24 to move, the positioning block 24 is separated from the clamping groove 25, the moving plate 2 stops moving, the connecting rope II 78 drives the connecting block 6 to move, the pulling rope I55 stops moving, the connecting plate 5 also stops moving, and the installation block 8 is pushed to move towards the direction close to the steel strand to be tensioned, so that the jack is installed.
A construction method of a bridge prestress device comprises the following steps:
The bottom plate 1 is moved to the vicinity of the bridge, the motor 35 is started, the moving plate 2 is moved upwards, the position of the connecting plate 5 is adjusted at the same time, when the jack and the steel strand to be tensioned are coaxially arranged, the brake rod 64 is rotated, and the moving plate 2 and the connecting plate 5 stop moving; and the installation block 8 is moved to enable the jack to move towards the direction close to the steel strand to be tensioned, so that the jack is installed.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (7)
1. The utility model provides a bridge prestressing device which characterized in that: the device comprises a bottom plate (1), a supporting rod (11) fixed on the top surface of the bottom plate (1) and a top plate (12) fixed on the top end of the supporting rod (11), wherein moving wheels (13) are arranged at corners of the bottom surface of the bottom plate (1), a screw (14) is rotatably arranged on the top surface of the bottom plate (1), a moving plate (2) moving vertically is sleeved on the periphery of the screw (14), the moving plate (2) is in spiral transmission fit with the screw (14), and a driving assembly for driving the screw (14) to rotate is arranged on the top plate (12); the top surface of the moving plate (2) is provided with a connecting plate (5) sliding along the length direction of the moving plate, the top surface of the connecting plate (5) is provided with a mounting block (8) moving along the width direction of the moving plate (2), the top surface of the mounting block (8) is provided with a mounting groove (81) for placing a jack, and the mounting groove (81) penetrates through the mounting block (8) along the width direction of the moving plate (2);
A cavity (21) is formed in the moving plate (2), a rotating cylinder (22) is rotatably mounted in the cavity (21), the rotating cylinder (22) is in spiral transmission fit with the screw (14), a clamping groove (25) is formed in the outer peripheral surface of the rotating cylinder (22), a positioning groove (23) is formed in the inner peripheral surface of the cavity (21), a positioning block (24) capable of being inserted in the clamping groove (25) is slidably mounted in the moving plate (2) along the length direction of the moving plate (2) through the positioning groove (23), a spring II (26) is fixed on the side surface, away from the rotating cylinder (22), of the positioning block (24), and one end, away from the positioning block (24), of the spring II (26) is fixedly connected with the moving plate (2);
The brake device is characterized in that a brake rod (64) which is vertically arranged is rotationally arranged on the moving plate (2), a rotating wheel (76) and a ratchet wheel (7) are fixedly sleeved on the outer peripheral surface of the brake rod (64), a connecting rope I (77) is fixedly arranged on the outer peripheral surface of the rotating wheel (76), one end, far away from the rotating wheel (76), of the connecting rope I (77) is fixedly connected with the side surface, far away from the rotating cylinder (22), of the positioning block (24), a pawl (71) which can be clamped with the ratchet wheel (7) is rotationally arranged on the moving plate (2), a spring III (75) is fixedly arranged on the side surface, far away from the ratchet wheel (7), of the pawl III (75), and one end, far away from the pawl (71), of the spring III is fixedly connected with the moving plate (2);
two first sliding grooves (27) are formed in the top surface of the moving plate (2), a third through hole (58) which is communicated with the first through hole (56) and the second through hole (57) are rotatably arranged on the bottom surface of the connecting plate (5), the first through hole (51) moves along the length direction of the moving plate (2) through the first sliding groove (27), a first through hole (56) and a second through hole (57) are formed in the top surface of the moving plate (2), the first through hole (56) is positioned on one side, close to the rotating cylinder (22), of the first sliding groove (27), the second through hole (57) is positioned on one side, far from the rotating cylinder (22), of the first sliding groove (27), a third through hole (58) which is communicated with the first through hole (56) and the second through hole (57) are arranged in the moving plate (2), a side, close to the rotating cylinder (22) is fixedly provided with a pull rope (55) on the side surface of the connecting plate (5), the other end of the pull rope (55) penetrates through the third through hole (58) and the second through hole (57) and is sequentially connected with the rotating plate (5) far from the side surface of the rotating cylinder (22), the connecting plate (6) is fixedly connected with the connecting plate (61) in the moving plate (6) along the moving direction, the top surface of connecting block (6) has been seted up and has been used for wearing to establish connecting through-hole (62) of stay cord one (55), connecting block (6) are close to the side of rotating wheel (76) is fixed with and connects rope two (78), connect rope two (78) keep away from one end of connecting block (6) with the outer peripheral face fixed connection of rotating wheel (76), connecting block (6) are kept away from the side of rotating wheel (76) is fixed with spring four (63), spring four (63) are kept away from one end of connecting block (6) with movable plate (2) fixed connection.
2. A bridge pre-stressing device according to claim 1, in which: the driving assembly comprises a first bevel gear (15) sleeved and fixed on the outer peripheral surface of the screw rod (14), a rotating rod (32) is slidably arranged on the top surface of the top plate (12) along the width direction of the moving plate (2), a second bevel gear (33) and a third bevel gear (34) are sleeved and fixed on the outer peripheral surface of the rotating rod (32), the second bevel gear (33) and the third bevel gear (34) are oppositely arranged, the first bevel gear (15) can be meshed with the second bevel gear (33) or the third bevel gear (34) mutually, and a rotating assembly used for driving the rotating rod (32) to rotate is arranged in the top plate (12).
3. A bridge pre-stressing device according to claim 2, in which: the rotating assembly comprises a motor (35) fixed on the top surface of the top plate (12), a rotating block (36) is fixed on an output shaft of the motor (35), a rectangular groove (37) is formed in the rotating block (36), the rotating block (36) slides along the width direction of the moving plate (2) through the rectangular groove (37) to be provided with a synchronizing block (38), the side surface of the synchronizing block (38) away from the motor (35) is fixedly connected with one end, close to the motor (35), of the rotating rod (32), a spring I (39) is fixed on the side surface, close to the motor (35), of the synchronizing block (38), and one end, close to the rectangular groove (37), of the spring I (39) is fixedly connected with the side surface, close to the motor (35), of the synchronizing block (38).
4. A bridge pre-stressing device according to claim 2, in which: the top surface of movable plate (2) has seted up recess one (41), wear to be equipped with push rod (4) in recess one (41), push rod (4) pass through recess one (41) are followed the width direction of movable plate (2) with movable plate (2) are slided and are connected, annular groove (45) have been seted up to the outer peripheral face of dwang (32), recess two (42) have been seted up to the top surface of bottom plate (1), recess three (43) have been seted up to the top surface of top plate (12), the bottom of push rod (4) is inserted and is established in recess two (42), the top of push rod (4) passes recess one (41) and inserts and establish in annular groove (45).
5. A bridge pre-stressing device according to claim 1, in which: the installation block (8) is provided with a bearing block (82) through the installation groove (81) in a vertical sliding manner, the top surface of the bearing block (82) is provided with an intrados surface, and the bottom surface of the bearing block (82) is fixed with a spring five (83).
6. The bridge pre-stressing device according to claim 5, characterized in that: a pressing block (84) is slidably arranged in the mounting block (8) along the length direction of the moving plate (2), a first reset block (86) is fixed on the bottom surface of the pressing block (84), a spring six (88) is fixed on the side surface of the first reset block (86) away from the bearing block (82), and one end of the spring six (88) away from the first reset block (86) is fixedly connected with the mounting block (8); an inclined plane I (821) is arranged on two sides of the bottom surface of the bearing block (82), and an inclined plane II (841) used for abutting against the inclined plane I (821) is arranged on the side surface, close to the bearing block (82), of the abutting block (84); a driving block (9) is vertically slidably arranged in the mounting block (8), inclined planes III (89) are respectively arranged on the side surfaces, close to each other, of the driving block (9) and the pressing block (84), reset blocks II (94) are respectively fixed on two sides of the driving block (9), a spring seven (941) is fixed on the top surface of the reset blocks II (94), and the top end of the spring seven (941) is fixedly connected with the mounting block (8); the top surface of the mounting block (8) is slidably provided with a clamping plate (95) along the length direction of the moving plate (2), a pushing block (97) is fixed on the side surface of the clamping plate (95) away from the bearing block (82), a spring eight (99) is fixed on the side surface of the pushing block (97) away from the bearing block (82), and the side surface of the spring eight (99) away from the pushing block (97) is fixedly connected with the mounting block (8); the side of drive piece (9) has been seted up and has been used for wearing to establish drive logical groove (92) of promotion piece (97), the interior top surface of drive logical groove (92) is fixed with joint piece (93), the top surface of promotion piece (97) has been seted up and is used for inserting establish joint groove (971) of joint piece (93).
7. A method of constructing a bridge pre-stressing device in accordance with any one of claims 1 to 6, characterized by: the method comprises the following steps:
The bottom plate (1) is moved to the vicinity of the bridge, the motor (35) is started, the moving plate (2) moves upwards, the position of the connecting plate (5) is adjusted, and when the jack and the steel strand to be tensioned are coaxially arranged, the brake rod (64) is rotated, and the moving plate (2) and the connecting plate (5) stop moving; and (3) moving the mounting block (8) to enable the jack to move towards the direction close to the steel strand to be tensioned, and mounting the jack.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210486021.3A CN114717966B (en) | 2022-05-06 | 2022-05-06 | Bridge prestress device and bridge prestress construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210486021.3A CN114717966B (en) | 2022-05-06 | 2022-05-06 | Bridge prestress device and bridge prestress construction method |
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| CN115712005B (en) * | 2022-11-01 | 2023-04-14 | 杭州科工电子科技有限公司 | A fixed tool for PCBA board test |
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| CN114717966A (en) | 2022-07-08 |
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