CN214061612U - Drawbench is used in construction in narrow and small space - Google Patents

Abstract

The utility model discloses a pipe drawing machine for construction in a narrow space, which comprises a traveling system and a pipe drawing system, wherein the traveling system comprises a traveling chassis, a main arm, a lifting arm and a pipe drawing winch; the pipe drawing system comprises a pipe rolling disc retracting structure, a pipe rolling disc, a protective cylinder and a protective cylinder receiving disc, wherein the protective cylinder receiving disc is connected with a main arm through a connecting rope, the tail end of the connecting rope is connected to a pipe drawing winch, the protective cylinder is connected to the bottom end of the protective cylinder receiving disc, the pipe rolling disc is connected to the pipe rolling disc retracting structure, and the pipe rolling disc retracting structure is arranged at the outer end of a walking chassis. The utility model reduces the whole height of the drilling machine by matching the protective cylinder arranged in sections with the main arm with shortened length, and meets the construction requirement of tube drawing in a narrow underground space; the pipe disc is arranged to repeatedly resist the movement of the protective cylinder to reduce the friction force during lifting in the pulling process, and the protective cylinder is stably and efficiently pulled out under the combined action of resisting movement and upward pulling.

Description

Drawbench is used in construction in narrow and small space

Technical Field

The utility model relates to a construction technical field, concretely relates to drawbench is used in construction in narrow and small space.

Background

As a deep foundation, the pile foundation is widely applied to foundation pit retaining, slope reinforcement, landslide control, structural anti-floating and anti-inclination, dam foundation stabilization and anchor foundation of a suspension cable structure, the geological conditions are complex under most conditions, the hole forming construction is involved, however, the engineering provides enough fields for providing an operation space for the piling machinery, and the operation is relatively simple.

In recent years, with the rapid development of underground engineering construction, a large number of pile foundation engineering in underground narrow space appears, and currently, a construction method of manual hole digging piles is mostly adopted, but the manual hole digging piles have the defects of poor working environment, poor safety performance, high labor cost, low pile forming efficiency and the like of constructors, cannot adapt to the trend of engineering mechanized construction, and are high in risk.

The technology of pile foundation construction is relatively more mature on the ground, but to underground works, because machinery will receive the restraint of narrow and small operating space, underground works self is in the geotechnical body, and the stability requirement to surrounding geotechnical body is high, and also has certain restriction to the weight of equipment self, therefore traditional pipe drawing technique on the ground can't use in the narrow and small space in the underground. Meanwhile, the common pipe drawing technology in the pile foundation is that a crawler crane is matched with a vibration hammer to lift and draw the steel casing, in the method, the length of the steel casing is longer, the height of required lifting and drawing equipment is also high, and the requirement of the clear height of an underground space cannot be met; the protective barrel is subjected to multiple times of hammering vibration by the vibration hammer in the process of pulling out the protective barrel, strong vibration can be generated on the soil body in the underground cave, and the safety of underground engineering is seriously threatened. Therefore, a brand-new, safe and efficient pipe drawing machine which can meet the requirement of narrow space of underground engineering is urgently needed to be provided, and a casing in a drill hole is drawn out, so that the development of underground engineering construction mechanization is promoted, and the technical problem in underground engineering is solved. The utility model provides a drawbench is used in construction in narrow and small space solves above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drawbench is used in construction in narrow and small space, adapt to the narrow and small space in underground, little, can realize high-efficient tube drawing to engineering safety influence to all ring edge borders.

The utility model provides a technical scheme that above-mentioned technical problem adopted is:

a pipe drawing machine for construction in a narrow space comprises a traveling system and a pipe drawing system, wherein the pipe drawing system is arranged at the end part of the traveling system and is provided with a traveling state and a working state; the traveling system comprises a traveling chassis, a main arm, a lifting arm, a pipe drawing winch and a hydraulic station, wherein the main arm, the lifting arm, the pipe drawing winch and the hydraulic station are arranged on the traveling chassis; the pipe drawing system comprises a pipe rolling disc retracting structure, a pipe rolling disc, a protective cylinder and a protective cylinder receiving disc, wherein the protective cylinder receiving disc is connected with a main arm through a connecting rope, the tail end of the connecting rope is connected to a pipe drawing winch, the protective cylinder is connected to the bottom end of the protective cylinder receiving disc and located in the pipe rolling disc, the pipe rolling disc is connected to the pipe rolling disc retracting structure, and the pipe rolling disc retracting structure is arranged at the outer end of a walking chassis.

Further, the main arm comprises an upper arm, a lower arm and a telescopic oil cylinder, the bottom end of the lower arm is hinged to the walking chassis, the upper arm and the telescopic oil cylinder are located in an inner cavity of the lower arm, the top end of the telescopic oil cylinder is arranged in the inner cavity of the upper arm, the bottom end of the telescopic oil cylinder is arranged in the inner cavity of the lower arm, the upper arm moves in a telescopic mode in the inner cavity of the lower arm, the top end of the lifting arm is connected to the top end of the lower arm, and the connecting rope bypasses the top end of the upper arm to be connected with the protective cylinder connecting disc.

Furthermore, an inner ring joint and an outer ring joint are respectively arranged at the upper end and the lower end of the protective cylinder; the protective cylinder receiving disc comprises a connecting ring and a connecting frame, and the connecting frame is arranged at the top of the connecting ring and is connected with the connecting rope through a pulley block; the inner ring joint is connected with the outer ring joint or the connecting ring in a sleeved mode;

the outer wall of the inner ring joint is provided with a connecting plate, the inner walls of the outer ring joint and the connecting ring are provided with connecting grooves, the connecting plate is positioned in the connecting grooves, the inner ring joint and the outer ring joint are provided with corresponding connecting holes, the connecting holes are arranged at intervals along the circumferential direction of the protective cylinder, and bolts are arranged in the connecting holes.

Further, the pipe twisting disc retracting structure comprises a lifting oil cylinder and a retracting winch, the lifting oil cylinder is fixedly connected to the outer end of the walking chassis and comprises a fixed end and a lifting end, and the lifting end is located on the lower side of the fixed end; the winding and unwinding winch is arranged at the top end of the lifting oil cylinder and is connected with the pipe twisting disc through a winding and unwinding rope.

Furthermore, the pipe twisting disc is movably connected to the lifting end of the lifting oil cylinder and comprises a base, a twisting oil cylinder, a rotating snap ring and a fixed snap ring, the fixed snap ring is fixedly connected to the base, the twisting oil cylinder is fixed to the base, the telescopic end of the twisting oil cylinder is connected with the rotating snap ring, and the rotating snap ring is located above the fixed snap ring;

the rotary clamping ring comprises a twisting upper ring, an annular clamping groove, a twisting bottom ring, clamping blocks and a rolling shaft protective wall, the twisting bottom ring is connected with the telescopic end of the twisting oil cylinder, the twisting upper ring is arranged on the top surface of the twisting bottom ring, the annular clamping grooves are arranged on the inner wall of the twisting upper ring at intervals, the clamping blocks are arranged in the annular clamping groove, the inner wall of the clamping blocks is in contact with the outer wall of the protective cylinder, and the rolling shaft protective wall is arranged on the bottom surface of the twisting bottom ring;

the fixed clamping ring comprises a heightening ring and a roller ring, the heightening ring is arranged on the base, the roller ring is arranged on the top surface of the heightening ring and is positioned on the inner side of the roller guard wall, the inner wall of the roller ring is in contact with the outer wall of the guard cylinder, and a gap which rotates relatively is formed between the roller ring and the roller guard wall;

the twisting upper ring, the twisting bottom ring, the rolling shaft protecting wall, the heightening ring and the roller ring are coaxially arranged up and down.

Furthermore, two rubbing oil cylinders are symmetrically arranged in the center and are oppositely arranged on two sides of the rubbing bottom ring; the two clamping blocks are arranged and are oppositely arranged in the annular clamping groove.

Furthermore, a tube rubbing strip is arranged on the protective cylinder, the tube rubbing strips are symmetrically arranged on the outer wall of the protective cylinder, a clamping groove is formed in the inner wall of the clamping block, and the tube rubbing strips are located in the clamping groove.

Furthermore, the walking chassis comprises a walking base, a rotary table and supporting legs, wherein the rotary table and the supporting legs are connected to the walking base.

Furthermore, the number of the pulley blocks is two, the two pulley blocks are respectively arranged at the outer end of the upper arm and the top end of the connecting frame, the tail end of the connecting rope is arranged on the tube drawing winch, and the head end of the connecting rope is connected to the pulley block.

The utility model discloses beneficial effect as follows:

the protective cylinders arranged in sections are matched with the main arm with the shortened length, so that the overall height of the pipe drawing machine is reduced, and the construction requirement of pipe drawing in a narrow underground space is met; the pipe filing disk is arranged to repeatedly file the protective cylinder in the pulling-out process so as to reduce the friction force during lifting, and the protective cylinder is stably and efficiently pulled out under the combined action of file and pull-up; in the pulling-out process, the concrete is poured in a matched mode and matched with the pulling-out height of the protective sleeve, so that the safety of the hole wall in the pulling-out process of the protective sleeve is ensured; the utility model has the advantages of require low, the construction mechanization degree is high, little, the tube drawing is efficient to engineering safety influence to the headroom.

Drawings

FIG. 1 is a schematic view of the usage state of the present invention;

fig. 2 is a top view of the overall structure of the present invention;

fig. 3 is a schematic view of the walking state of the present invention;

fig. 4 is a schematic view of the working state of the present invention;

fig. 5 is an exploded view of the main arm structure of the present invention;

FIG. 6 is a schematic view of the retractable structure of the tube rolling disc of the present invention;

FIG. 7 is a top view of the tube rolling disc of the present invention;

FIG. 8 is a sectional view of the tube rolling disc of the present invention;

fig. 9 is a cross-sectional view of the casing of the present invention;

fig. 10 is a schematic view of a pile casing flange of the present invention;

fig. 11 is a bottom view of the protective sleeve flange of the present invention.

Reference numerals: 1-walking chassis, 11-walking base, 12-rotary table, 13-supporting leg, 2-main arm, 21-upper arm, 22-lower arm, 23-telescopic oil cylinder, 3-lifting arm, 4-tube drawing winch, 5-tube twisting disc folding and unfolding structure, 51-lifting oil cylinder, 52-folding winch, 6-tube twisting disc, 61-base, 62-twisting oil cylinder, 63-rotating snap ring, 631-twisting upper ring, 632-annular clamping groove, 633-twisting bottom ring, 634-clamping block, 635-roller protective wall, 64-fixing snap ring, 641-heightening ring, 642-roller ring, 7-protective cylinder, 71-inner ring connector, 72-outer ring connector, 73-connecting plate, 74-connecting groove and 75-connecting hole, 76-a pipe rubbing strip, 8-a protective cylinder flange, 81-a connecting ring, 82-a connecting frame, 83-a pulley block and 9-a connecting rope.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

As shown in fig. 1, 2, 3 and 4, a pipe drawing machine for construction in a narrow space comprises a traveling system and a pipe drawing system, wherein the pipe drawing system is arranged at the end part of the traveling system and is provided with a traveling state and a working state; the traveling system comprises a traveling chassis 1, a main arm 2, a lifting arm 3, a tube drawing winch 4 and a hydraulic station, wherein the main arm 2, the lifting arm 3, the tube drawing winch 4 and the hydraulic station are arranged on the traveling chassis 1, and the hydraulic station supplies energy to the main arm 2, the lifting arm 3, a tube twisting disc retracting structure 5 and a tube twisting disc 6; the pipe drawing system comprises a pipe rolling disc retracting structure 5, a pipe rolling disc 6, a protective cylinder 7 and a protective cylinder flange 8, wherein the protective cylinder flange 8 is connected with the main arm 2 through a connecting rope 9, the tail end of the connecting rope 9 is connected to the pipe drawing winch 4, the protective cylinder 7 is connected to the bottom end of the protective cylinder flange 8 and is located in the pipe rolling disc 6, the pipe rolling disc 6 is connected to the pipe rolling disc retracting structure 5, and the pipe rolling disc retracting structure 5 is arranged at the outer end of the walking chassis 1.

The principle of the utility model is as follows: the long protective barrel is formed by connecting single-section protective barrels 7, when a pipe is pulled out, a protective barrel receiving disc 8 is detachably connected with the protective barrel 7 positioned at the top end, then a rotating clamp ring 63 of a pipe twisting disc 6 is clamped on the outer wall of the protective barrel 7 positioned at the top end to drive the protective barrel 7 to move together, a twisting oil cylinder 62 on the pipe twisting disc 6 moves in a telescopic mode after a power supply is started to drive the rotating clamp ring 63 to rub repeatedly, the protective barrel 7 is driven to rub repeatedly together, the protective barrel 7 is separated from a hole wall, meanwhile, a connecting rope 9 at the top of the protective barrel receiving disc 8 pulls the protective barrel receiving disc 8 and the protective barrel 7 to be pulled upwards together, rubbing and lifting are achieved, the protective barrel 7 is lifted out of the hole, the long protective barrel is divided into the single-section protective barrels 7 to be lifted in sequence, and underground pipe pulling operation is achieved.

As shown in fig. 3, 4 and 5, further, the main arm 2 includes an upper arm 21, a lower arm 22 and a telescopic cylinder 23, the bottom end of the lower arm 22 is hinged to the walking chassis 1, the upper arm 21 and the telescopic cylinder 23 are located in the inner cavity of the lower arm 22, the top end of the telescopic cylinder 23 is located in the inner cavity of the upper arm 21, the bottom end of the telescopic cylinder is located in the inner cavity of the lower arm 22, the upper arm 21 moves telescopically in the inner cavity of the lower arm 22, the top end of the lifting arm 3 is hinged to the top end of the lower arm 22, and the connecting rope 9 bypasses the top end of the upper arm 21 and is connected with the casing flange 8. The telescopic oil cylinder 23 is used for adjusting the length of the main arm 2 in a telescopic mode, the lifting arm 3 is used for adjusting the height of the main arm 2 in a telescopic mode, and the top end of the upper arm 21 is kept vertically lifted through the synergistic effect of the telescopic oil cylinder 23 and the lifting arm 3.

As shown in fig. 10 and 11, an inner ring joint 71 and an outer ring joint 72 are respectively arranged at the upper end and the lower end of the casing 7; the protective sleeve flange 8 comprises a connecting ring 81 and a connecting frame 82, wherein the connecting frame 82 is arranged at the top of the connecting ring 81 and is connected with a connecting rope 9 through a pulley block 83; the inner ring joint 71 is connected with the outer ring joint 72 or the connecting ring 81 in a sleeved mode.

As shown in fig. 9 and 10, a connecting plate 73 is disposed on an outer wall of the inner ring joint 71, connecting grooves 74 are disposed on inner walls of the outer ring joint 72 and the connecting ring 81, the connecting plate 73 is located in the connecting grooves 74, corresponding connecting holes 75 are disposed on the inner ring joint 71 and the outer ring joint 72, the connecting holes 75 are spaced along a circumferential direction of the casing 7, and bolts are disposed therein. The cooperation of the connecting plate 73 and the connecting groove 74 has the functions of positioning, limiting and fixing alignment.

The connection between the pile casing flange 8 and the pile casing 7 is sleeved on the inner ring joint 71 of the lower pile casing 7 through a connecting ring 81 to be connected, and the adjacent pile casings 7 are sleeved on the inner ring joint 71 of the lower pile casing 7 through the outer ring joint 72 of the upper pile casing 7 to be connected to form long pile casings one by one.

Furthermore, a hoisting hole is arranged on the inner ring joint 71 of the casing 7. The protective cylinder 7 is used for lifting and moving after being pulled out.

Preferably, because the underground space is narrow and small, the installation and the demolition operation of a long casing are guaranteed to not have enough space, adopt every section of nipple joint setting of length 1m to installation and tube drawing work go on in the narrow and small space of underground.

The connection mode between the protective sleeves 7 is as follows: the inner ring joint 71 of the lower pile casing 7 is tightly sleeved by the outer ring joint 72 of the upper pile casing 7, meanwhile, the connecting plate 73 on the outer wall of the inner ring joint 71 is clamped by the corresponding connecting groove 74 on the inner wall of the outer ring joint 72, and then bolts are used for penetrating through the connecting holes 75 on the inner ring joint 71 and the outer ring joint 72 to sequentially connect the pile casings 7.

As shown in fig. 3, 4 and 6, further, two winding and unwinding structures 5 are symmetrically arranged, each winding and unwinding structure includes a lifting cylinder 51 and a winding and unwinding winch 52, the lifting cylinder 51 is fixedly connected to the outer end of the walking chassis 1, and includes a fixed end and a lifting end, and the lifting end is located at the lower side of the fixed end; the winding and unwinding winch 52 is arranged at the top end of the lifting oil cylinder 51 and is connected with the pipe twisting disc 6 through a winding and unwinding rope.

As shown in fig. 3, in the traveling state, the pipe twisting reel 6 is pulled up by the take-up and pay-off winch 52 using the take-up and pay-off rope, and the lift cylinder 51 is retracted, so that the pipe twisting reel 6 is in the hoisting and retracting movement state. As shown in fig. 4, in the working state, the pipe twisting disc 6 is released by the rope winding and unwinding of the winding and unwinding winch 52, and the lifting cylinder 51 extends out at the same time, so that the pipe twisting disc 6 is horizontally placed on the ground for construction.

As shown in fig. 3, 4, 7 and 8, further, the pipe twisting disk 6 is movably connected to the lifting end of the lifting cylinder 51, and includes a base 61, a twisting cylinder 62, a rotating snap ring 63 and a fixing snap ring 64, the fixing snap ring 64 is fixedly connected to the base 61, the twisting cylinder 62 is fixed to the base 61, the telescopic end of the twisting cylinder is hinged to the rotating snap ring 63, and the rotating snap ring 63 is located above the fixing snap ring 64;

as shown in fig. 7 and 8, the rotary snap ring 63 includes a twisting upper ring 631, an annular groove 632, a twisting bottom ring 633, a blocking block 634 and a roller protection wall 635, the twisting bottom ring 633 is connected to the telescopic end of the twisting cylinder 62, the twisting upper ring 631 is disposed on the top surface of the twisting bottom ring 633, the annular grooves 632 are disposed at intervals on the inner wall of the twisting upper ring 631, the blocking block 634 is disposed in the annular groove 632, the inner wall of the blocking block is in contact with the outer wall of the protection cylinder 7, and the roller protection wall 635 is disposed on the bottom surface of the twisting bottom ring 633;

as shown in fig. 7 and 8, the fixed snap ring 64 includes an elevated ring 641 and a roller ring 642, the elevated ring 641 is disposed on the base 61, the roller ring 642 is disposed on the top surface of the elevated ring 641 and located inside the roller guard wall 635, the inner wall of the roller ring is in contact with the outer wall of the guard tube 7, a gap for relative rotation is formed between the roller ring 642 and the roller guard wall 635, and the relative rotation between the rotary snap ring 63 and the fixed snap ring 64 is realized through the gap between the roller ring 642 and the roller guard wall 635.

Preferably, the roller ring 642 comprises an outer wall and vertical rollers arranged in the outer wall at intervals, the inner wall of each roller is in contact with the outer wall of the corresponding pile casing 7 to play a role in limiting and reducing friction, sliding friction is changed into rolling friction, and the pile casings 7 are convenient to roll.

The twisting upper ring 631, the twisting bottom ring 633, the roller guard wall 635, the heightening ring 641 and the roller ring 642 are coaxially arranged up and down.

The principle of the pipe twisting disk 6 is that a rotary snap ring 63 positioned above and a fixed snap ring 64 positioned below move relatively, the fixed snap ring 64 is arranged on the base 61 and keeps still, the rotary snap ring 63 can be twisted flexibly and repeatedly under the drive of the twisting oil cylinder 62, the clamp block 634 is clamped on the pipe twisting strip 76 on the outer wall of the protective cylinder 7, and the protective cylinder 7 is driven to realize synchronous movement, so that the protective cylinder 7 is separated from the hole wall.

Further, base 61 inboard is equipped with the connection otic placode, lift cylinder 51's bottom is equipped with connection base, be equipped with the connection otic placode on the connection base, the connection otic placode on the base 61 and the connection otic placode on the lift cylinder 51 can be dismantled through the round pin axle and be connected.

As shown in fig. 7, further, two rubbing oil cylinders 62 are arranged in central symmetry and are oppositely arranged at two sides of the rubbing bottom ring 633; the two clamping blocks 634 are oppositely arranged in the annular clamping groove 632.

As shown in fig. 9, a pipe twisting strip 76 is further arranged on the casing 7, the pipe twisting strips 76 are symmetrically arranged on the outer wall of the casing 7, a clamping groove is arranged on the inner wall of the clamping block 634, and the pipe twisting strip 76 is located in the clamping groove. Preferably, the tube twisting bar 76 is of an inverted T shape for cooperating with the slot on the block 634.

As shown in fig. 3 and 4, the walking chassis 1 further comprises a walking base 11, a turntable 12 and a leg 13, wherein the turntable 12 and the leg 13 are connected to the walking base 11.

Further, a connecting base is arranged on the rotary table 12 and used for connecting the main arm 2 and placing the tube drawing winch 4.

Furthermore, two pulley blocks 83 are arranged and are respectively arranged at the outer end of the upper arm 21 and the top end of the connecting frame 82, the tail end of the connecting rope 9 is arranged on the pipe drawing winch 4, and the head end of the connecting rope is connected to the pulley block 83.

A construction method of a pipe drawing machine for construction in a narrow space comprises the following steps:

s1, positioning a tube drawing machine: moving the tube drawing machine to a hole position where the protective sleeve needs to be drawn out, unfolding the tube drawing system from a walking state to a working state, enabling the tube twisting disc 6 to be located on the outer side of the protective sleeve 7, and extending the supporting legs 13 to ensure that the tube drawing machine is stably positioned;

s2, extending the main arm: extending the upper arm 21 and the lifting arm 3, and enabling the pile casing flange 8 to be positioned above the pile casing 7 and to be kept centered by adjusting the extending lengths of the upper arm 21 and the lifting arm 3;

s3, fixing the casing: after aligning the fixture block 634 with the pipe twisting bar 76, clamping the pipe twisting bar into the annular clamp groove 632, and tightly clamping and connecting the protective cylinder 7 with the rotary clamp ring 63;

s4, pouring concrete: pouring concrete in the holes, and stopping pouring when the height of the poured concrete reaches 2 m;

s5, connecting the protection tube: controlling the tube drawing winch 4 to reduce the height of the protective tube receiving disc 8, and connecting a connecting ring 81 of the protective tube receiving disc 8 with an inner ring joint 71 of the protective tube 7, so that the protective tube receiving disc 8 is fixedly connected with the protective tube 7;

s6, pulling out the protective sleeve: starting the twisting oil cylinder 62 and the tube drawing winch 4, repeatedly twisting the protective cylinder 7 back and forth under the action of the twisting oil cylinder 62, and simultaneously, drawing the protective cylinder 7 upwards by the tube drawing winch 4 through the connecting rope 9 to draw out the protective cylinder 7;

s7, continuous operation: and after the first section of protective barrel 7 is pulled out, the protective barrel flange 8 is disconnected from the first section of protective barrel 7, and then the two sections of protective barrels 7 are pulled out continuously according to the operation of pouring 2m of depth from S4 to S6 until all the protective barrels 7 are pulled out.

Furthermore, the steel casing is pulled out along with pouring of the concrete of the cast pile body, and a measuring rope can be adopted to measure the pouring height in the pouring process; when the depth of the cast concrete exceeds 2m, the pile casing is properly lifted, but the lower opening of the pile casing is always kept at least below 1m of the surface of the cast concrete, so that hole collapse is avoided; when the protective cylinder is pulled out, the pile body concrete in the concrete guide pipe and below 2 meters of the lower opening of the guide pipe is ensured to have good workability, and the bottom end of the guide pipe is strictly forbidden to be lifted out of the concrete surface.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Claims (7)

1. A pipe drawing machine for construction in a narrow space is characterized by comprising a traveling system and a pipe drawing system, wherein the pipe drawing system is arranged at the end part of the traveling system and is provided with a traveling state and a working state; the travelling system comprises a travelling chassis (1), a main arm (2), a lifting arm (3), a tube drawing winch (4) and a hydraulic station, wherein the main arm (2), the lifting arm (3), the tube drawing winch (4) and the hydraulic station are arranged on the travelling chassis (1); the pipe drawing system comprises a pipe twisting disc folding and unfolding structure (5), a pipe twisting disc (6), a protective cylinder (7) and a protective cylinder connecting disc (8), wherein the protective cylinder connecting disc (8) is connected with the main arm (2) through a connecting rope (9), the tail end of the connecting rope (9) is connected to the pipe drawing winch (4), the protective cylinder (7) is connected to the bottom end of the protective cylinder connecting disc (8) and is positioned in the pipe twisting disc (6), the pipe twisting disc (6) is connected to the pipe twisting disc folding and unfolding structure (5), and the pipe twisting disc folding and unfolding structure (5) is arranged at the outer end of the walking chassis (1);

the main arm (2) comprises an upper arm (21), a lower arm (22) and a telescopic oil cylinder (23), the bottom end of the lower arm (22) is hinged to the walking chassis (1), the upper arm (21) and the telescopic oil cylinder (23) are located in the inner cavity of the lower arm (22), the top end of the telescopic oil cylinder (23) is arranged in the inner cavity of the upper arm (21), the bottom end of the telescopic oil cylinder is arranged in the inner cavity of the lower arm (22), the upper arm (21) moves in a telescopic mode in the inner cavity of the lower arm (22), the top end of the lifting arm (3) is connected to the top end of the lower arm (22), and the connecting rope (9) bypasses the top end of the upper arm (21) and is connected with the protective cylinder connecting disc (8);

the pipe twisting disc retracting structure (5) comprises a lifting oil cylinder (51) and a retracting winch (52), the lifting oil cylinder (51) is fixedly connected to the outer end of the walking chassis (1) and comprises a fixed end and a lifting end, and the lifting end is located on the lower side of the fixed end; the winding and unwinding winch (52) is arranged at the top end of the lifting oil cylinder (51) and is connected with the pipe twisting disc (6) through a winding and unwinding rope.

2. The pipe drawing bench for construction in a narrow space according to claim 1, wherein: the upper end and the lower end of the protective cylinder (7) are respectively provided with an inner ring joint (71) and an outer ring joint (72); the protective cylinder flange (8) comprises a connecting ring (81) and a connecting frame (82), wherein the connecting frame (82) is arranged at the top of the connecting ring (81) and is connected with a connecting rope (9) through a pulley block (83); the inner ring joint (71) is connected with the outer ring joint (72) or the connecting ring (81) in a sleeved mode;

the outer wall of the inner ring joint (71) is provided with a connecting plate (73), the inner walls of the outer ring joint (72) and the connecting ring (81) are provided with connecting grooves (74), the connecting plate (73) is positioned in the connecting grooves (74), the inner ring joint (71) and the outer ring joint (72) are provided with corresponding connecting holes (75), the connecting holes (75) are arranged at intervals along the circumferential direction of the pile casing (7), and bolts are arranged in the connecting holes.

3. The pipe drawing bench for construction in a narrow space according to claim 1, wherein: the pipe twisting disc (6) is movably connected to the lifting end of the lifting oil cylinder (51) and comprises a base (61), a twisting oil cylinder (62), a rotating clamping ring (63) and a fixing clamping ring (64), the fixing clamping ring (64) is fixedly connected to the base (61), the twisting oil cylinder (62) is fixed to the base (61), the telescopic end of the twisting oil cylinder is connected with the rotating clamping ring (63), and the rotating clamping ring (63) is located above the fixing clamping ring (64);

the rotary clamping ring (63) comprises a twisting upper ring (631), an annular clamping groove (632), a twisting bottom ring (633), a clamping block (634) and a roller protecting wall (635), the twisting bottom ring (633) is connected with the telescopic end of the twisting oil cylinder (62), the twisting upper ring (631) is arranged on the top surface of the twisting bottom ring (633), the annular clamping grooves (632) are arranged on the inner wall of the twisting upper ring (631) at intervals, the clamping block (634) is arranged in the annular clamping groove (632), the inner wall of the clamping block is in contact with the outer wall of the protecting cylinder (7), and the roller protecting wall (635) is arranged on the bottom surface of the twisting bottom ring (633);

the fixed snap ring (64) comprises an increasing ring (641) and a roller ring (642), the increasing ring (641) is arranged on the base (61), the roller ring (642) is arranged on the top surface of the increasing ring (641) and is positioned on the inner side of the roller retaining wall (635), the inner wall of the roller ring is in contact with the outer wall of the retaining cylinder (7), and a relative rotating gap is formed between the roller ring (642) and the roller retaining wall (635);

the twisting upper ring (631), the twisting bottom ring (633), the rolling shaft guard wall (635), the heightening ring (641) and the roller ring (642) are coaxially arranged up and down.

4. The pipe drawing bench for construction in a narrow space as claimed in claim 3, wherein: two rubbing oil cylinders (62) are arranged in the central symmetry mode and are oppositely arranged on two sides of the rubbing bottom ring (633); the two clamping blocks (634) are oppositely arranged in the annular clamping groove (632).

5. The pipe drawing bench for construction in a narrow space as claimed in claim 4, wherein: the pipe twisting device is characterized in that pipe twisting strips (76) are arranged on the protective barrel (7), the pipe twisting strips (76) are symmetrically arranged on the outer wall of the protective barrel (7), clamping grooves are formed in the inner wall of each clamping block (634), and the pipe twisting strips (76) are located in the clamping grooves.

6. The pipe drawing bench for construction in a narrow space according to claim 1, wherein: the walking chassis (1) comprises a walking base (11), a rotary table (12) and supporting legs (13), wherein the rotary table (12) and the supporting legs (13) are connected to the walking base (11).

7. The pipe drawing bench for construction in a narrow space as claimed in claim 2, wherein: the two pulley blocks (83) are respectively arranged at the outer end of the upper arm (21) and the top end of the connecting frame (82), the tail end of the connecting rope (9) is arranged on the pipe drawing winch (4), and the head end of the connecting rope is connected to the pulley block (83).

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