Prestress concave end post-tensioning large-span concrete beam tensioning equipment

Abstract

The utility model discloses a pre-stress concave type end post-tensioning large-span concrete beam tensioning device, which relates to the technical field of building construction and comprises a base, a lifting mechanism is arranged on the upper surface of the base, a cutting mechanism is arranged on the surface of the lifting mechanism, a jack is fixedly arranged at the top of the lifting mechanism, and the cutting mechanism is arranged on the top of the lifting mechanism. The position of the cutting mechanism corresponds to that of the jack; the lifting mechanism comprises a transmission box fixedly connected to the upper surface of the base, and two lifting lead screws are rotationally connected to the upper surface of the transmission box. The lifting mechanism is arranged on the surface of the base, the lifting mechanism can be used for adjusting and positioning the height of the jack, so that the jack is aligned and positioned with the positions of the steel cables on the two sides of the concrete beam, and then the steel cables can be tensioned conveniently through the jack in the follow-up process; the stability of the jack in the steel cable tensioning process is effectively improved, adjustability is high, operation is convenient and fast, and construction efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building construction, especially relates to a prestressed recessed end post-tensioning large-span concrete beam tensioning equipment. BACKGROUND

[0002] The post-tensioning method refers to pouring cement concrete first, and then tensioning the prestressed steel to form a prestressed concrete component after reaching more than 75% of the design strength. This method is widely used in bridges and large-span buildings.

[0003] When tensioning the steel strand inside the large-span concrete beam, the jack is usually used to stretch and tighten the two ends of the steel strand on both sides of the concrete beam, but the position of the jack is usually adjusted by a crane in the prior art, which is not only poor in stability, but also inconvenient for aligning and positioning the jack and the steel strand, and the worker needs to use a cutting tool to cut off the steel strand, which is not conducive to improving work efficiency. UTILITY MODEL CONTENT

[0004] The utility model discloses a prestressed recessed end post-tensioning large-span concrete beam tensioning equipment,

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A prestressed recessed end post-tensioning large-span concrete beam tensioning equipment, comprising a base, the upper surface of the base is provided with a lifting mechanism, the surface of the lifting mechanism is provided with a cutting mechanism, and the top of the lifting mechanism is fixedly provided with a jack, the position of the cutting mechanism corresponds to the jack;

[0007] The lifting mechanism comprises a transmission box fixedly connected to the upper surface of the base, two lifting lead screws are rotatably connected to the upper surface of the transmission box, lifting plates are threadedly connected to the surfaces of the two lifting lead screws, and a movable mounting seat is fixedly connected between the two lifting plates.

[0008] The cutting mechanism comprises an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with a movable block, the surface of the movable block is fixedly connected with a cutting machine mounting rack, and a cutting blade is rotatably arranged on the top of the cutting machine mounting rack.

[0009] In one preferred scheme, a cutting motor is fixedly installed on the side surface of the cutting machine mounting rack, and the output shaft of the cutting motor is fixedly connected with the surface of the cutting blade.

[0010] In a preferred scheme, the lower surface of the movable mounting seat is fixedly connected with a limiting baffle, the surface of the limiting baffle is provided with a rectangular limiting hole, the inner wall of the rectangular limiting hole is fixedly connected with a guide rod, and the movable block is in sliding connection with the surface of the guide rod.

[0011] In a preferred scheme, the bottom end of the lifting lead screw extends to the inside of the transmission box, and the bottom of the lifting lead screw is fixedly provided with a worm gear, the inner wall of the transmission box is rotatably connected with an adjusting rod, and the surface of the adjusting rod is fixedly connected with two worm gears.

[0012] In a preferred scheme, the position of the worm gear corresponds to the worm gear, and the worm gear is engaged with the worm gear, one end of the worm gear extends to the outside of the transmission box, and is fixedly connected with an adjusting hand wheel.

[0013] In a preferred scheme, the cutting blade is located directly below one end of the jack, and the lower surface of the base is fixedly provided with four brake wheels.

[0014] In a preferred scheme, the upper surface of the base is fixedly connected with two limiting support rods, the top end of the limiting support rod is fixedly provided with a top plate, and the lifting plate is in sliding connection with the surface of the limiting support rod.

[0015] As can be seen from the above, the prestressed recessed end post-tensioning large-span concrete beam tensioning equipment has the following technical effects.

[0016] Firstly, the height of the jack can be adjusted and positioned by the lifting mechanism arranged on the surface of the base, so that the jack is aligned and positioned with the steel cables on both sides of the concrete beam, thereby facilitating subsequent tensioning operation of the steel cables by the jack, effectively improving the stability of the jack in the process of tensioning the steel cables, and the adjustability is high, the operation is convenient, and the construction efficiency is improved.

[0017] Secondly, the cutting mechanism arranged on the surface of the lifting plate can cut the steel cable by the rotating cutting blade driven by the electric telescopic rod after the tensioning operation of the steel cable by the jack is completed, so that the tensioning and cutting of the steel cable are integrated, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A front view structural schematic diagram of the prestressed recessed end post-tensioning large-span concrete beam tensioning equipment is provided.

[0019] Figure 2 A side view structural schematic diagram of the prestressed recessed end post-tensioning large-span concrete beam tensioning equipment is provided.

[0020] Figure 3The utility model provides a kind of transmission case internal structure schematic diagram of prestressed recessed end post-tensioning large-span concrete beam tensioning equipment.

[0021] Figure 4 The utility model provides a kind of cutting mechanism right section structure schematic diagram of prestressed recessed end post-tensioning large-span concrete beam tensioning equipment.

[0022] In the drawing: 1, base; 2, lifting mechanism; 3, cutting mechanism; 4, jack; 5, brake wheel; 6, limiting support rod; 7, top plate;

[0023] 201, transmission case; 202, lifting screw rod; 203, lifting plate; 204, movable mounting seat; 205, worm gear; 206, adjusting rod; 207, worm; 208, adjusting hand wheel;

[0024] 301, electric telescopic rod; 302, movable block; 303, cutting machine mounting frame; 304, cutting piece; 305, cutting motor; 306, rectangular limiting hole; 307, guide rod; 308, limiting baffle. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0026] Reference Figure 1 And Figure 2 A kind of prestressed recessed end post-tensioning large-span concrete beam tensioning equipment, including base 1, the lower surface of base 1 is fixedly installed with four brake wheels 5.

[0027] By being provided with four brake wheels 5 in the bottom of base 1, it is convenient to move the base 1 of tensioning equipment, and it is convenient to limit base 1.

[0028] The upper surface of base 1 is provided with lifting mechanism 2, the surface of lifting mechanism 2 is provided with cutting mechanism 3, and the top of lifting mechanism 2 is fixedly provided with jack 4, and the position of cutting mechanism 3 corresponds to jack 4.

[0029] Lifting mechanism 2 includes transmission case 201 fixedly connected on the upper surface of base 1, the upper surface of transmission case 201 is rotatably connected with two lifting screw rods 202, the surface of two lifting screw rods 202 is all screw-connected with lifting plate 203, and movable mounting seat 204 is fixedly connected between two lifting plates 203.

[0030] It should be noted that the upper surface of the base 1 is fixedly connected with two limiting support rods 6, and the top end of the limiting support rod 6 is fixedly connected with a top plate 7. The lifting plate 203 is in sliding connection with the surface of the limiting support rod 6.

[0031] By setting the limiting support rod 6, the lifting plate 203 can be guided and limited by the limiting support rod 6, thereby improving the stability of the lifting plate 203 during upward and downward movement.

[0032] It should be noted that the lower surface of the movable mounting seat 204 is fixedly connected with a limiting baffle 308, and the surface of the limiting baffle 308 is provided with a rectangular limiting hole 306. The inner wall of the rectangular limiting hole 306 is fixedly connected with a guide rod 307, and the movable block 302 is in sliding connection with the surface of the guide rod 307.

[0033] The size of the movable block 302 matches that of the rectangular limiting hole 306, and the movable block 302 is in sliding connection with the inner wall of the rectangular limiting hole 306. By setting the guide rod 307, the movable block 302 can be guided and limited by the guide rod 307.

[0034] It should be further pointed out that the position of the worm 207 corresponds to that of the worm gear 205, and the worm 207 is in engagement with the worm gear 205. One end of the worm 207 extends to the outside of the transmission box 201, and is fixedly connected with an adjusting hand wheel 208.

[0035] It is worth mentioning that by setting the lifting mechanism 2 on the surface of the base 1, the two lifting lead screws 202 can be driven to rotate simultaneously by rotating the adjusting rod 206, thereby driving the lifting plate 203 to move up and down, and thereby adjusting and positioning the height of the jack 4, so that the jack 4 is aligned and positioned with the steel cable positions on both sides of the concrete beam, thereby facilitating subsequent tensioning operation of the steel cable by the jack 4, effectively improving the stability of the jack 4 in tensioning the steel cable, and having high adjustability, convenient operation, and helping to improve construction efficiency.

[0036] Referring to Figure 3 and Figure 4 In one preferred embodiment, the cutting mechanism 3 comprises an electric telescopic rod 301, and the telescopic end of the electric telescopic rod 301 is fixedly connected with a movable block 302. The surface of the movable block 302 is fixedly connected with a cutting machine mounting bracket 303, and the top of the cutting machine mounting bracket 303 is rotatably provided with a cutting blade 304. The cutting blade 304 is located directly below one end of the jack 4.

[0037] In one preferred embodiment, the side surface of the cutting machine mounting bracket 303 is fixedly provided with a cutting motor 305, and the output shaft of the cutting motor 305 is fixedly connected with the surface of the cutting blade 304.

[0038] It is worth mentioning that by setting the cutting mechanism 3 on the surface of the lifting plate 203, the cutting machine mounting frame 303 can be driven to move up and down by the electric telescopic rod 301 after the jack 4 completes the cable tensioning operation, and then the high-speed rotating cutting blade 304 is used to cut the cable, realizing the tensioning and cutting integration operation of the cable, which is beneficial to improve the work efficiency.

[0039] Working principle: in use, first of all, the base 1 is moved to the both sides of the concrete beam, then the adjusting hand wheel 208 is rotated to drive the adjusting rod 206 to rotate, and then the two worms 207 are driven to rotate at the same time, the two worms 207 are used to drive the two worm gears 205 to rotate, and then the two lifting lead screws 202 are driven to rotate, the two lifting lead screws 202 drive the two lifting plates 203 to move up and down, and then the movable mounting seat 204 and the jack 4 are moved, so that the jack 4 is aligned and positioned with the cable position on the side of the concrete beam, then the cable is inserted through the inside of the jack 4, and the lock is used to limit the cable, then the jack 4 is used to tension the cable, after the tensioning operation is completed, the movable block 302 is driven to slide on the surface of the guide rod 307 by the electric telescopic rod 301, and the cutting blade 304 is driven to rotate at high speed by the cutting motor 305, and then the cutting blade 304 is longitudinally cut during the upward movement, realizing the cutting operation of the excess cable, which is beneficial to improve the work efficiency.

[0040] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. The replacement can be the replacement of part of the structure, device, method step, or the complete technical solution. According to the technical scheme and the utility model concept of the present application, equivalent replacement or change should be covered in the protection scope of the present application.

Claims

1. A prestressed recessed end post-tensioned large-span concrete beam tensioning device comprising a base (1), characterized in that, The upper surface of the base (1) is provided with a lifting mechanism (2), the surface of the lifting mechanism (2) is provided with a cutting mechanism (3), and the top of the lifting mechanism (2) is fixedly provided with a jack (4), and the position of the cutting mechanism (3) corresponds to the jack (4); The lifting mechanism (2) comprises a transmission box (201) fixedly connected to the upper surface of the base (1), the upper surface of the transmission box (201) is rotatably connected with two lifting lead screws (202), the surfaces of the two lifting lead screws (202) are both threadedly connected with lifting plates (203), and the two lifting plates (203) are fixedly connected with a movable mounting seat (204); The cutting mechanism (3) comprises an electric telescopic rod (301), the telescopic end of the electric telescopic rod (301) is fixedly connected with a movable block (302), the surface of the movable block (302) is fixedly connected with a cutting machine mounting rack (303), and the top of the cutting machine mounting rack (303) is rotatably provided with a cutting blade (304).

2. The prestressed recessed end post-tensioned large-span concrete beam tensioning equipment according to claim 1, characterized in that, The side surface of the cutting machine mounting rack (303) is fixedly provided with a cutting motor (305), and the output shaft of the cutting motor (305) is fixedly connected with the surface of the cutting blade (304).

3. The prestressed recessed end post-tensioned large-span concrete beam tensioning equipment according to claim 1, characterized in that, The lower surface of the movable mounting seat (204) is fixedly connected with a limiting baffle (308), the surface of the limiting baffle (308) is provided with a rectangular limiting hole (306), the inner wall of the rectangular limiting hole (306) is fixedly connected with a guide rod (307), and the surface of the movable block (302) is slidably connected with the guide rod (307).

4. The prestressed recessed end post-tensioned large-span concrete beam tensioning equipment according to claim 1, characterized in that, The bottom end of the lifting lead screw (202) extends to the inside of the transmission box (201), and the bottom of the lifting lead screw (202) is fixedly provided with a worm gear (205), the inner wall of the transmission box (201) is rotatably connected with an adjusting rod (206), and the surface of the adjusting rod (206) is fixedly connected with two worm gears (207).

5. The prestressed recessed end post-tensioned large-span concrete beam tensioning equipment according to claim 4, characterized in that, The position of the worm gear (207) corresponds to the worm gear (205), and the worm gear (207) is engaged with the worm gear (205), one end of the worm gear (207) extends to the outside of the transmission box (201), and the adjusting hand wheel (208) is fixedly connected.

6. The prestressed recessed end post-tensioned large-span concrete beam tensioning equipment according to claim 1, characterized in that, The cutting blade (304) is located directly below one end of the jack (4), and the lower surface of the base (1) is fixedly provided with four brake wheels (5).

7. The prestressed recessed end post-tensioned large-span concrete beam tensioning equipment according to claim 1, characterized in that, The upper surface of the base (1) is fixedly connected with two limiting support rods (6), the top end of the limiting support rod (6) is fixedly provided with a top plate (7), and the surface of the lifting plate (203) is slidably connected with the limiting support rod (6).

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