Mechanical underwater steel pipe cutting machine

Abstract

The utility model discloses a mechanical underwater steel pipe cutting machine which comprises a fixed clamping block, the fixed clamping block is connected with a telescopic hydraulic oil cylinder, and the top end of a piston of the telescopic hydraulic oil cylinder is connected with a movable clamping block. The fixed clamping block is provided with a rotary hydraulic motor and a rotary cylinder, a first driving shaft of the rotary hydraulic motor is provided with a gear, and the rotary cylinder is provided with a gear ring meshed with the gear; a fixing plate is arranged at the bottom of the rotary cylinder, a gearbox is in sliding fit with the lower surface of the fixing plate and connected with a hydraulic push rod motor, a driving gear of the gearbox is connected with a cutting hydraulic motor, a driven gear of the gearbox is provided with a gear shaft, and a cutting blade is installed on the gear shaft. The cutting machine is fixed in a steel pipe through the telescopic hydraulic oil cylinder, the hydraulic push rod motor pushes the cutting blade to the wall of the steel pipe, the cutting hydraulic motor drives the cutting blade to rotate, the rotary hydraulic motor drives the cutting blade to circumferentially cut the steel pipe, and therefore the purpose of cutting the steel pipe underwater is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cutting equipment technical field, especially relate to mechanical cutting machine of cutting underwater steel pipe. BACKGROUND

[0002] In bridge construction, steel pipe piles are driven between the built bridge piers for temporarily supporting the steel beam of the bridge surface. After the completion of the bridge surface, the steel pipe piles need to be removed in order not to affect the navigation of water vessels. Since the steel pipe piles are soaked in water for a long time, the surrounding soil (especially silt and clay) is gradually compacted due to water pressure and soil self-weight, forming a stronger cohesive force with the pile body. For steel pipe piles with excessively long length, the total cohesive force often exceeds the upper limit of the load of conventional equipment, and the steel pipe piles cannot be removed as a whole. At present, divers are needed to cut the steel pipe piles above the silt. This underwater cutting operation has a long preparation time, low work efficiency, high cost, and safety hazards. SUMMARY

[0003] The utility model aims at fixing the cutting machine in the steel pipe through the telescopic hydraulic cylinder, pushing the cutting blade to the steel pipe wall by the hydraulic push rod motor, rotating the cutting blade by the cutting hydraulic motor, and cutting the steel pipe in the circumferential direction by the rotary hydraulic motor, so as to solve the problem that the steel pipe pile cannot be pulled out, and the diver needs to perform underwater cutting, which not only has low cutting efficiency and high cost, but also has high safety hazards.

[0004] The specific technical scheme of the utility model is as follows:

[0005] The mechanical underwater steel pipe cutting machine comprises a fixed clamping block, the fixed clamping block is connected with a telescopic hydraulic cylinder, the piston top end of the telescopic hydraulic cylinder is connected with a movable clamping block, a rotary hydraulic motor is installed on the fixed clamping block, a supporting piece is arranged on the lower part of the inner surface of the fixed clamping block, the supporting piece is rotationally connected with a rotary cylinder, a driving shaft of the rotary hydraulic motor is provided with a gear, the rotary cylinder is provided with a gear ring engaged with the gear, a fixed plate is arranged at the bottom of the rotary cylinder, a gear change box is slidably connected to the lower surface of the fixed plate, the gear change box is connected with a hydraulic push rod motor, the hydraulic push rod motor drives the gear change box to slide at the lower part of the fixed plate, the gear change box is provided with a driving gear connected with a cutting hydraulic motor, the gear change box is provided with a driven gear provided with a gear shaft, and the gear shaft is provided with a cutting blade.

[0006] Further, a linear sliding groove is arranged on the lower surface of the fixed plate, and a connecting piece is arranged on the upper surface of the gear change box, and the upper part of the connecting piece is provided with a sliding block matched with the linear sliding groove.

[0007] Further, the linear sliding groove is a dovetail groove.

[0008] Further, the fixed plate side vertical surface is provided with a notch, a sliding shaft is arranged on the connecting piece side vertical surface, the sliding shaft is located in the notch, a hydraulic push rod motor is vertically arranged on the inner wall of the rotary cylinder, a pusher is arranged on the top end of the hydraulic push rod motor, the pusher is provided with an inclined sliding groove, and the inclined sliding groove and the sliding shaft form a slot-pin pair.

[0009] Further, the pusher is provided with a limiting shaft, the inner surface of the rotary cylinder is provided with a limiting piece, a limiting sliding groove is arranged on the limiting piece, and the limiting sliding groove and the limiting shaft form a slot-pin pair.

[0010] Further, the fixed clamping block and the movable clamping block are arc-shaped in cross section.

[0011] Further, the fixed clamping block is connected with two telescopic hydraulic oil cylinders on the two sides respectively, and the piston top ends of the two telescopic hydraulic oil cylinders are connected with the two sides of the movable clamping block respectively.

[0012] Further, a connecting hinge one is arranged on the two sides of the fixed clamping block respectively, the telescopic hydraulic oil cylinder is connected with the fixed clamping block pin shaft through the connecting hinge one, a connecting hinge two is arranged on the two sides of the movable clamping block respectively, and the piston top end of the telescopic hydraulic oil cylinder is connected with the movable clamping block pin shaft through the connecting hinge two.

[0013] Further, the supporting piece is provided with a rotating hole, a bearing is fixedly arranged on the outer vertical surface of the rotary cylinder, the outer ring of the bearing is fixedly connected with the rotating hole, and the rotary cylinder is rotatably connected with the supporting piece through the bearing.

[0014] Further, the fixed clamping block and the movable clamping block are made of patterned steel plates.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] When working, the cutting machine is hoisted by the crane, the movable clamping block is retracted to the bottom through the telescopic hydraulic oil cylinder, then the bottom end of the cutting machine is aligned with the upper opening of the steel pipe pile, the cutting machine is slowly put into the steel pipe pile until the cutting machine is put into the water bottom, the movable clamping block is pressed against the inner wall of the steel pipe pile by starting the telescopic hydraulic oil cylinder, the cutting machine is fixed in the steel pipe pile, then the cutting blade is rotated by starting the cutting hydraulic motor, the cutting blade is pushed towards the steel pipe pile by starting the hydraulic push rod motor, until the steel pipe pile is cut through, then the rotary hydraulic motor is started, the cutting blade is circumferentially cut to the steel pipe pile until the steel pipe pile is cut off, then the cutting hydraulic motor is stopped, the cutting blade is retracted through the hydraulic push rod motor, the cutting machine and the steel pipe pile are taken out of the water surface together through the crane, the movable clamping block is retracted through the telescopic hydraulic oil cylinder after the steel pipe pile is placed, and the cutting machine is taken out of the steel pipe pile, the whole process does not need the underwater operation of the operator, the steel pipe pile can be cut off, the cutting time is saved, the work efficiency is improved, and the safety hidden danger caused by the underwater operation of the personnel is avoided, and the safety of the cutting operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a top view of the embodiment of the utility model;

[0018] Fig. 2 is a partial sectional view of the fixed clamping block, the movable clamping block and the rotary cylinder of the embodiment of the utility model;

[0019] Fig. 3 is a front view of the embodiment of the utility model;

[0020] Fig. 4 is a side view of the embodiment of the utility model;

[0021] Reference signs:

[0022] 1, fixed clamping block; 11, connecting hinge one;

[0023] 2, telescopic hydraulic oil cylinder

[0024] 3, movable clamping block; 31, connecting hinge two;

[0025] 4, rotary hydraulic motor; 41, gear;

[0026] 5, rotary cylinder; 51, gear ring; 52, fixed plate; 521, linear sliding slot; 522, notch; 523, limiting piece; 524, limiting sliding slot;

[0027] 6, cutting hydraulic motor;

[0028] 7, gear change box; 71, connecting piece; 711, sliding block; 712, sliding shaft; 72, inner pressing plate; 73, outer pressing plate; 74, fastening nut;

[0029] 8, cutting piece;

[0030] 9, hydraulic push rod motor; 91, pusher; 911, inclined sliding slot; 912, limiting shaft. DETAILED DESCRIPTION

[0031] In order to better understand the purpose, structure and function of the utility model, the technical scheme in the embodiment of the utility model will be described clearly and completely in conjunction with the drawings.

[0032] Refer to Figs. 1 to 4The embodiment discloses a mechanical underwater steel pipe cutting machine, which comprises a fixed clamping block 1, a telescopic hydraulic oil cylinder 2 connected with the fixed clamping block 1, a movable clamping block 3 connected with the piston top end of the telescopic hydraulic oil cylinder 2, and the movable clamping block 3 is started to abut against the inner wall of the steel pipe pile, so that the cutting machine can be fixed in the steel pipe pile; a rotary hydraulic motor 4 is arranged on the fixed clamping block 1, a supporting piece is arranged on the inner surface lower portion of the fixed clamping block 1, the supporting piece is rotationally connected with a rotary cylinder 5, a gear 41 is arranged on the driving shaft of the rotary hydraulic motor 4, the rotary cylinder 5 is provided with a gear ring 51 meshing with the gear 41, the rotary hydraulic motor 4 is started to drive the rotary cylinder 5 to rotate; the rotary cylinder 5 is provided with a fixed plate 52, a gear speed changer 7 is slidably connected with the lower surface of the fixed plate 52, the gear speed changer 7 is connected with a hydraulic push rod motor 9, the hydraulic push rod motor 9 drives the gear speed changer 7 to slide at the lower portion of the fixed plate 52, the hydraulic push rod motor 9 is started to push a cutting piece 8 to the steel pipe pile until the steel pipe pile is cut through, a driving gear of the gear speed changer 7 is connected with a cutting hydraulic motor 6, a driven gear of the gear speed changer 7 is provided with a gear shaft, the gear shaft is provided with the cutting piece 8, in the embodiment, the gear shaft is provided with threads, the cutting piece 8 is fixedly arranged between inner pressure plates 72 and outer pressure plates 73 through the thread connection between the threads of the gear shaft and the inner pressure plates 72 and the outer pressure plates 73, the outer pressure plates 73 are fixed through a fastening nut 74, the cutting piece 8 is rotated to cut the steel pipe pile through the starting of the cutting hydraulic motor 6.

[0033] The lower surface of the fixed plate 52 is provided with a linear sliding groove 521, the upper surface of the gear speed changer 7 is provided with a connecting piece 71, the upper portion of the connecting piece 71 is provided with a sliding block 711 matched with the linear sliding groove 521, the linear sliding groove 521 is a dovetail groove, the trapezoidal slope design of the dovetail groove can effectively disperse the horizontal force and the longitudinal force, the gear speed changer 7 and the fixed plate 52 are connected through the linear sliding groove 521 and the sliding block 711, so that the gear speed changer 7 and the fixed plate 52 are not easy to loosen or fall out and can provide a stable linear motion track, the friction force generated by the slope angle can realize self-locking, and no additional fixing device is needed to keep close cooperation.

[0034] A slot 522 is arranged on the side vertical surface of the fixed plate 52, a sliding shaft 712 is arranged on the side vertical surface of the connecting piece 71, the sliding shaft 712 is located at the slot 522, the hydraulic push rod motor 9 is vertically arranged on the inner wall of the rotary cylinder 5, the top end of the push rod of the hydraulic push rod motor 9 is provided with a pushing piece 91, the pushing piece 91 is provided with an inclined sliding groove 911, the inclined sliding groove 911 and the sliding shaft 712 form a slot pin pair, when the hydraulic push rod motor 9 drives the connecting piece 71 to slide through the pushing piece 91, the position of the sliding shaft 712 in the inclined sliding groove 911 determines the sliding direction and distance of the connecting piece 71.

[0035] The pusher 91 is provided with a limiting shaft 912, the inner surface of the rotating cylinder 5 is provided with a limiting piece 523, the limiting piece 523 is provided with a limiting sliding groove 524, and the limiting sliding groove 524 and the limiting shaft 912 form a groove-pin pair, so that when the pusher 91 pushes the connecting piece 71, the pushing track is more stable.

[0036] The fixed clamping block 1 and the movable clamping block 3 are arc-shaped in cross section, and the arc-shaped design makes the fixed clamping block 1 and the movable clamping block 3 more closely fit the inner wall of the steel pipe pile, thereby being clamped more firmly.

[0037] The fixed clamping block 1 is connected with the telescopic hydraulic oil cylinder 2 on both sides, the piston top of the two telescopic hydraulic oil cylinders 2 is connected with the movable clamping block 3 on both sides, and the telescopic hydraulic oil cylinder 2 is arranged on both sides, so that the movable clamping block 3 is more uniformly stressed and can be more firmly pressed against the inner wall of the steel pipe pile.

[0038] The fixed clamping block 1 is provided with a connecting hinge ear one 11 on both sides, the telescopic hydraulic oil cylinder 2 is connected with the fixed clamping block 1 through the connecting hinge ear one 11, the movable clamping block 3 is provided with a connecting hinge ear two 31 on both sides, and the piston top of the telescopic hydraulic oil cylinder 2 is connected with the movable clamping block 3 through the connecting hinge ear two 31, the hinge ear connecting structure design can make the fixed clamping block 1 and the movable clamping block 3 bear larger pressure and impact force, and the hinge ear connecting structure design is convenient to disassemble, simplifying the maintenance and replacement process of the telescopic hydraulic oil cylinder 2.

[0039] The supporting piece is provided with a rotating hole, the outer vertical surface of the rotating cylinder 5 is fixedly provided with a bearing, the outer ring of the bearing is fixedly connected with the rotating hole, the rotating cylinder 5 is rotatably connected with the supporting piece through the bearing, and the bearing changes the sliding friction between the rotating cylinder 5 and the rotating hole into rolling friction, reducing energy loss.

[0040] The fixed clamping block 1 and the movable clamping block 3 are made of corrugated steel plates, and the protruding rhombic, circular or strip patterns on the surface of the corrugated steel plates can significantly increase the friction between the fixed clamping block 1 and the movable clamping block 3 and the inner wall of the steel pipe pile.

[0041] Working principle: when working, the cutting machine is hoisted by the crane, the movable clamp block 3 is retracted to the bottom through the telescopic hydraulic cylinder 2, then the bottom end of the cutting machine is aligned with the upper opening of the steel pipe pile, the cutting machine is slowly put into the steel pipe pile until it is put into the water bottom, in the process, the underwater camera can be used to further determine whether the cutting machine is put into the water bottom and whether the position is correct, the telescopic hydraulic cylinder 2 is started to make the movable clamp block 3 abut against the inner wall of the steel pipe pile, so that the cutting machine is firmly fixed in the steel pipe pile, then the cutting hydraulic motor 6 is started to drive the cutting blade 8 to rotate, the hydraulic push rod motor 9 is started to push the cutting blade 8 to the steel pipe pile until the steel pipe pile is cut through, the rotary hydraulic motor 4 is started to drive the cutting blade 8 to cut the steel pipe pile in the circumferential direction until the steel pipe pile is cut off, then the cutting hydraulic motor 6 is stopped, the cutting blade 8 is retracted through the hydraulic push rod motor 9, then the cutting machine is taken out from the steel pipe pile through the crane, the movable clamp block 3 is retracted through the telescopic hydraulic cylinder 2, and the cutting machine is taken out from the steel pipe pile, the whole process does not need the underwater operation of the operator, the steel pipe pile can be cut off, the cutting time is saved, the working efficiency is improved, and the safety hidden danger brought by the underwater operation of the personnel is avoided, and the safety of the cutting operation is improved.

[0042] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A mechanical underwater steel pipe cutting machine, characterized in that: The utility model provides a kind of cutting machine, including fixed block (1), fixed block (1) is connected with telescopic hydraulic cylinder (2), the piston top end of telescopic hydraulic cylinder (2) is connected with movable block (3);Rotary hydraulic motor (4) is installed on fixed block (1), supporting piece is equipped in the lower portion of the inner surface of fixed block (1), supporting piece rotatably connects with rotary cylinder (5), the driving shaft of rotary hydraulic motor (4) one is equipped with gear (41), rotary cylinder (5) is equipped with gear ring (51) with gear (41) meshing;Rotary cylinder (5) bottom is equipped with fixed plate (52), the lower surface of fixed plate (52) is slidably fitted with gear box (7), gear box (7) is connected with hydraulic push rod motor (9), hydraulic push rod motor (9) pushes gear box (7) to slide in the lower portion of fixed plate (52);Driving gear of gear box (7) is connected with cutting hydraulic motor (6), driven gear of gear box (7) is equipped with gear shaft, gear shaft is equipped with cutting piece (8).

2. The mechanical underwater steel pipe cutting machine according to claim 1, characterized in that, The lower surface of fixed plate (52) is equipped with linear slide groove (521), the upper surface of gear box (7) is equipped with connecting piece (71), the upper portion of connecting piece (71) is equipped with sliding block (711) matched with linear slide groove (521).

3. A mechanical underwater steel pipe cutting machine according to claim 2, characterised in that, Linear slide groove (521) is dovetail groove.

4. A mechanical underwater steel pipe cutting machine according to claim 3, characterised in that, The side elevation of fixed plate (52) is provided with notch (522), the side elevation of connecting piece (71) is provided with sliding shaft (712), sliding shaft (712) is located at notch (522), hydraulic push rod motor (9) is vertically installed on the inner wall of rotary cylinder (5), the top end of the push rod of hydraulic push rod motor (9) is provided with pushing piece (91), pushing piece (91) is provided with inclined slide groove (911), inclined slide groove (911) and sliding shaft (712) form a slot-pin pair.

5. A mechanical underwater steel pipe cutting machine according to claim 4, characterised in that, Pushing piece (91) is provided with limiting shaft (912), the inner surface of rotary cylinder (5) is provided with limiting piece (523), limiting piece (523) is provided with limiting slide groove (524) on the upper surface, limiting slide groove (524) and limiting shaft (912) form a slot-pin pair.

6. The mechanical underwater steel pipe cutting machine according to claim 1, characterized in that, The cross section of fixed block (1) and movable block (3) is arc-shaped.

7. A mechanical underwater steel pipe cutting machine according to claim 6, characterised in that, Two sides of fixed block (1) are connected with telescopic hydraulic cylinder (2) respectively, the top end of the piston of two telescopic hydraulic cylinders (2) is connected with two sides of movable block (3) respectively.

8. A mechanical underwater steel pipe cutting machine according to claim 7, characterised in that, Connecting hinge one (11) is arranged on both sides of fixed block (1) respectively, telescopic hydraulic cylinder (2) is connected with fixed block (1) by pin shaft through connecting hinge one (11), connecting hinge two (31) is arranged on both sides of movable block (3) respectively, the top end of the piston of telescopic hydraulic cylinder (2) is connected with movable block (3) by pin shaft through connecting hinge two (31).

9. The mechanical underwater steel pipe cutter of claim 1, wherein, The supporting piece is provided with a rotating hole, the outer vertical surface of the rotary cylinder (5) is fixedly provided with a bearing, the outer ring of the bearing is fixedly connected with the rotating hole, and the rotary cylinder (5) is rotatably connected with the supporting piece through the bearing.

10. The mechanical underwater steel pipe cutting machine according to claim 1, characterized in that, The material of fixed block (1) and movable block (3) is patterned steel plate.

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