CN218063392U - Push bench main shaft seal structure and have its long distance push bench - Google Patents

Abstract

The utility model provides a push bench main shaft seal structure and have its long distance push bench. The push bench main shaft sealing structure comprises a force transmission ring, and a force transmission ring sealing ring is arranged on the force transmission ring; the upper and lower rows of force transmission ring sealing rings are respectively provided with a row of force transmission ring sealing rings, the structural composition of the upper and lower rows of force transmission ring sealing rings is completely the same, the two ends of the upper and lower rows of force transmission ring sealing rings are mutually symmetrical in the vertical direction, and the upper and lower rows of force transmission ring sealing rings are mutually parallel in the horizontal direction; each row of force transmission ring sealing rings comprises a plurality of force transmission ring sealing rings, the width of each force transmission ring sealing ring is the same as that of each other, and each force transmission ring sealing ring is provided with a plurality of water stopping teeth; the water stopping teeth at multiple positions of each force transmission ring sealing ring are same in orientation, height and distance. The utility model provides a push bench main shaft seal structure has good leakproofness and wearability, can strengthen the leakproofness of long distance push bench main shaft, is favorable to push bench long distance operation.

Description

Push bench main shaft seal structure and have its long distance push bench

Technical Field

The utility model relates to a ground and geological engineering technical field, concretely relates to a be applicable to composite stratum and carry out long distance pipe push bench of pipeline construction for pipe push bench main shaft seal structure and have this seal structure.

Background

With the acceleration of the urbanization process, the projects of liquid and gaseous medium transmission pipelines for passing through roads, rivers and buildings inside and outside cities are increasing day by day, and the trenchless technology is widely applied. The pipe-jacking construction is a construction method of underground pipelines developed after shield construction, does not need to excavate a surface layer, and can pass through highways, railways, rivers, ground buildings, underground structures, various underground pipelines and the like. The pipe jacking engineering technology is a non-excavation or few-excavation construction method, a pipeline is jacked into the soil according to an actual design gradient by utilizing acting force generated by jacking equipment, and a tool pipe or a heading machine is pushed from a working well through a soil layer to a receiving well to be hoisted by means of the thrust of a main jacking oil cylinder and an inter-pipeline relay. Meanwhile, the pipeline following the tool pipe or the heading machine is buried between the two wells, so that the construction method for laying the underground pipeline in a non-excavation manner is realized. One of the pipe jacking construction processes is a slurry-water balanced construction process, which refers to a method for pipe jacking work in which slurry in a cutting tool cavity of a pipe jacking machine is kept at a certain pressure.

As one of trenchless technologies, the slurry-water balanced jacking pipe technology has the advantages of wide soil layer adaptation, stable driving surface and small ground settlement, and has strong adaptability in large and medium-sized pipelines crossing roads and rivers and crossing other pipeline projects, so that the technology is widely applied. With the development of national underground pipe networks, the demand of pipe jacking machines is increasing. The pipe jacking is applied to various stratums such as soft soil, silt, sand pebbles, rocks and the like. Due to complex geological conditions, the pipe jacking equipment suitable for the geological conditions is selected for each project according to the hydrological and geological conditions of the project.

The trenchless pipe jacking technology is widely applied to underground space construction, but is limited to equipment function and process research, pipe jacking construction is generally carried out in a common soil layer in the past, if a composite stratum is encountered, high-strength rock in the pipe jacking construction cannot be excavated by a pipe jacking machine, open excavation or pre-splitting blasting construction can be carried out, so that the construction cost is increased, the construction efficiency is low, the safety risk is high, and the construction is influenced. In addition, in the existing push bench, under the action of gravel and slag, the cutter of the push bench needs to be replaced frequently, and when part of the hobs are damaged, the hobs of the cutter head need to be replaced completely at one time, so that part of the hobs cannot be replaced, and the construction cost is high. And the stratum that the pipe jacking machine passes through is complicated, and when the operation of extra long distance push pipe, its higher requirement to leakproofness.

Therefore, how to design a main shaft sealing structure of a push bench and a long-distance push bench capable of being used for pipeline construction in a composite stratum has become an important subject before those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a push bench main shaft seal structure, simple structure, manufacturing convenience, and have good leakproofness and wearability, can strengthen the leakproofness of long distance push bench main shaft.

The utility model also provides a long distance pipe pushing jack can be used to compound stratum and be under construction, and it has multiple sealed design, and whole leakproofness is good, makes things convenient for pipe pushing jack at compound stratum and long distance operation. Furthermore, the utility model provides a push bench sets up the manhole passageway, and the staff can get into blade disc department and observe, inspect, change the cutter that has worn and torn, can realize the change of partial cutter, is favorable to controlling push bench construction cost.

In order to achieve the above object, the present invention provides a tube push bench spindle sealing structure, which comprises a force transmission ring, wherein a force transmission ring sealing ring is arranged on the force transmission ring; the upper and lower rows of the force transfer ring are respectively provided with a row of force transfer ring sealing rings, the structure composition of the upper and lower rows of the force transfer ring sealing rings is completely the same, the two ends of the upper and lower rows of the force transfer ring sealing rings are symmetrical to each other in the vertical direction, and the upper and lower rows of the force transfer ring sealing rings are parallel to each other in the horizontal direction; each row of force transmission ring sealing rings comprises a plurality of force transmission ring sealing rings, the width of each force transmission ring sealing ring is the same as that of each other, and each force transmission ring sealing ring is provided with a plurality of water stopping teeth; the water stopping teeth at multiple positions of each force transmission ring sealing ring are same in orientation, height and distance.

Furthermore, the force transmission ring seal ring is arranged on the force transmission ring through a connecting structure, and an oil hole is formed between the force transmission ring seal rings.

Further, the force transmission ring sealing ring is a rubber sealing ring; each row of force transmission ring sealing rings are provided with three force transmission ring sealing rings, and each force transmission ring sealing ring is provided with 4 water stopping teeth.

The height of the rubber sealing ring is 28mm, and the assembly clearance is 20mm.

Another aspect of the present invention provides a long-distance push bench, which comprises a first pipe body, a second pipe body and a third pipe body; the first pipe body, the second pipe body and the second pipe body are sequentially hinged in pairs along the advancing direction of the push bench, a crushing device, a driving device and a cabin partition plate are arranged in the first pipe body, the first pipe body is divided into two cabins by the cabin partition plate, the driving device is arranged on one side of the cabin partition plate, and the crushing device is arranged on the other side of the cabin partition plate; the crushing device is connected with the driving device through a hollow rotating shaft and finishes cutting and crushing actions under the driving of the driving device; just be provided with in the cavity formula pivot the utility model provides a push bench main shaft seal structure.

Furthermore, sealing structures are respectively arranged at the hinged part of the first pipe body and the second pipe body and the hinged part of the second pipe body and the third pipe body; the first pipe body and the second pipe body are working cabins; the third pipe body is an air pressure cabin; and a water stopping structure and a shield tail brush are arranged on the periphery of the third pipe body.

Further, the long-distance pipe jacking machine further comprises a shell, and the shell is sleeved on the peripheries of the first pipe body, the second pipe body and the third pipe body; a pipe wall gap is arranged between the pipe body and the shell.

Further, the crushing device comprises a crushing cutter head, a crushing bin and a muddy water bin; the crushing cutter head is arranged at one end of the first pipe body; the crushing cutter head comprises a cutter head body and a cutter fixed on the cutter head body; the cutter comprises a first double-edged hob, a second double-edged hob, a single-edged hob, a front scraper and an edge scraper; the double-edged hob and the single-edged hob are fixed through a fixing piece respectively; broken blade disc carries out first breakage to the rock, just breaker still is provided with and is used for changing the manhole passageway of cutter.

Further, the mounting includes latch segment, locking bolt, U type support and dismantlement bolt, the locking bolt passes the latch segment will either the twolip hobbing cutter or the twolip hobbing cutter is fixed on the blade disc body, the dismantlement bolt passes in proper order U type support with the latch segment will either the twolip hobbing cutter or the twolip hobbing cutter is demolishd.

Furthermore, the crushing bin comprises a shell cone and a cutter head bracket, the shell cone is provided with crushing strips, a feeding hole and an auxiliary feeding hole, and the mud-water bin is provided with a mud discharge channel; and the sludge subjected to secondary crushing in the crushing bin enters the muddy water bin and is discharged through the sludge discharge channel.

Further, the stagnant water structure includes that twice prop formula gasbag form rubber seal ring outward, the thickness that props formula gasbag form rubber seal ring outward is 70mm, and the width is 40mm.

Furthermore, an outer ring and a snowboard are arranged on the periphery of the first pipe body, the outer ring is arranged at the first end of the first pipe body, and the snowboard is abutted to the outer ring.

Furthermore, the long-distance pipe jacking machine further comprises a push stop ring, wherein an articulated jack is arranged in the push stop ring and is articulated with the third pipe body through the articulated jack, shield tail brushes are arranged on the periphery of the push stop ring, and oil filling holes are uniformly formed in the extending direction of the gap of the shield tail brushes.

Furthermore, the driving device comprises a speed reducer and a driving motor connected with the speed reducer, and a deviation rectifying jack is further arranged in the first pipe body.

Further, a measuring system is arranged in the first pipe body; and an electrical cabinet, a deviation rectifying power station connected with the deviation rectifying jack and a hinged jack arranged at the hinged position of the second pipe body and the third pipe body are arranged in the second pipe body.

Furthermore, the measuring system comprises a measuring target and a pitching inclinometer which are arranged on the rear shell.

Further, first body, second body and third body are the steel pipe, the internal diameter of steel pipe is 2000mm, and external diameter 2020mm.

Further, the external diameter of casing is 2080mm, the external diameter of broken blade disc is 2140mm.

Furthermore, the diameter of the feed inlet is 100-120mm, and the diameter of the auxiliary feed hole is 45mm.

Furthermore, the muddy water storehouse is annular three-dimensional space, and the internal diameter is 1050mm, and the external diameter is 1990mm, and length is 250mm, and the space volume is 0.56 cubic meter.

Furthermore, wear-resistant strips are arranged on the front surface and the outer ring surface of the crushing cutter head.

Through the technical scheme provided by the utility model, the utility model provides a push bench main shaft seal structure respectively has 3 biography power ring seal circles about the biography power ring, and the width of every way biography power ring seal circle is 105mm, is provided with 4 stagnant water teeth on every way biography power ring seal circle, that is to say that outside muddy water need with cross inside 12 barriers could reach drive arrangement's gear box, better protection drive arrangement's gear box transmission system. In addition, the height of the force transmission ring sealing ring is 28mm, the assembly gap is 20mm, and the compaction amount of the rubber reaches 28%. An oil hole is arranged between the force transmission ring sealing rings and is used as emergency pressure sealing. When the jacking machine is used for jacking, the grease lubricating pump synchronously works and simultaneously plays a role in lubricating, so that the abrasion of the force transmission ring sealing ring is reduced, and the sealing performance of the main shaft of the jacking machine is improved.

The utility model provides a long distance pipe pushing jack has following technological effect at least:

(1) The long-distance pipe pushing jack provided by the utility model adopts the pipe pushing jack main shaft sealing structure provided by the utility model to seal the main shaft of the pipe pushing jack, the structure is simple, the sealing performance is good, and the wear resistance is good;

(2) The pipe wall gap is arranged between the pipe body and the shell of the long-distance pipe jacking machine, so that an anti-attrition slurry sleeve of the pipe wall can be formed during jacking operation, the jacking force is reduced, and the jacking distance is increased once;

(3) The utility model provides a blade disc bracket setting of long distance pipe push bench is provided with broken strip in broken storehouse. When breaker rotates, under drive arrangement drives, the hobbing cutter can be broken into great cubic with the rock, and bold form rock is taken in broken storehouse under scraper and circulating water coaction, the blade disc bracket is broken into the fritter granule with broken crisscross extrusion of strip when rotating with great piece rock and enters into the muddy water storehouse, then is discharged through the mud discharging channel at the muddy water storehouse by the circulating water, this circulation is all round and all over until the tunnelling is accomplished, just so through smashing the rock granule and improving the circulation rate of mud, and then improve entire system's work efficiency.

(4) The utility model provides an outer ring is designed at the end part of the first pipe body of the long-distance pipe jacking machine, and a ski is arranged at the 120-degree direction below the first pipe body, so that on one hand, the slag can be prevented from flowing backwards, and the slag can fill the gap to block the pipe jacking machine, thereby preventing the push pipe from being pushed; on the other hand, the cutting outer diameter of the crushing cutter head is much larger than the outer diameter of the shell, and the outer ring can be beneficial to controlling the posture of the push bench.

(5) The utility model provides an inner diameter of manhole passageway of long distance pipe pushing jack is 600mm, and the staff can make things convenient for the business turn over. The size of the space on the back of the crushing cutter head is D2008 x 600mm (without the cone part), and the space can be used for 2 persons to carry out the cutter changing work.

(6) The utility model provides an outer side of the third pipe body of the long-distance pipe jacking machine is provided with an external-bracing type double air bag and a shield tail brush, and the gap extension of the normal-pressure tool-changing front shield tail brush presses and injects shield tail grease to 6 uniformly distributed 1 inch grease injection holes to plug the building gap to play roles of slurry-protecting sleeve and water-stopping; the utility model provides a push bench's third body still splices one section length 2060 mm's pair and pushes away the stall ring, and the connected form of paying to push away the stall ring and third body is F type interface socket joint formula, should pay the stroke 300mm apical force 4X 1500KN of paying of pushing away the stall ring, should pay when broken blade disc changes the cutter to push away the hydro-cylinder of paying of pushing away the stall ring and roll back and pull back push bench be convenient for the tool changing operation.

(7) The utility model provides an outside front position of the third body of long distance pipe push bench is provided with stagnant water structure and shield tail brush. The water stopping structure comprises two external-supporting air bag-shaped rubber water stopping rings with the thickness of 70mm and the width of 40mm, and can conveniently stop the water flowing out of the pipe wall at the rear part of the pipe jacking machine, so that an operator can smoothly enter the rear part of the cutter head to perform cutter changing operation.

(8) The utility model provides a be "well" font between first body, second body and the third body of long distance pipe pushing jack and distribute 4 hydro-cylinders hookups of rectifying, have three sealing washers in the clearance between the body. It can ensure that no leakage occurs in the gap during the deviation rectifying process. Meanwhile, the joint of the first pipe body, the second pipe body and the third pipe body is welded with a bolt of a deflection preventing device, so that the relative deflection of the first pipe body, the second pipe body and the third pipe body is effectively prevented.

By adopting the long-distance push bench provided by the utility model, the structure arrangement of a plurality of hobbing cutters in the crushing device in the push bench can be adopted, so that the rock is uniformly and efficiently cut in the cutting process of the push bench on the rock geology, and the smooth jacking of the pipe body of the push bench is further ensured; meanwhile, the rock fragments subjected to secondary crushing treatment in the crushing bin can be crushed into more delicate rock fragments, so that the rock fragments and the slurry bin are mixed in slurry and enter the sludge discharge channel, and the blockage phenomenon is avoided when the slurry is discharged out of the pipe jacking equipment. Furthermore, the utility model provides a long distance pipe pushing jack is convenient for change the cutter according to the cutter in service behavior in the work progress. For example, when the pipe jacking machine enters a soft soil section from a rock section, the cutter head cutters of the pipe jacking machine can be replaced by segment and step by step according to the condition of a tunnel face during construction, and part of hobbing cutters are replaced by claw cutters, so that the opening rate is increased, and the tunneling efficiency is improved.

Therefore, the utility model provides a long distance pipe jacking machine can be according to the whole or partial cutter of changing of stratum structure, is favorable to improving the efficiency of construction and controls pipe jacking machine construction cost. Just the utility model provides a long distance push bench's sealed design is the form that multiple sealed combination got up, further improves push bench complete machine reliability.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

FIG. 1 is a schematic structural view of a push bench spindle sealing structure provided by the present invention;

FIG. 2 is a schematic view of the overall structure of the long-distance push bench provided by the present invention;

FIG. 3 is a schematic view of the crushing apparatus of FIG. 2;

fig. 4 is a front structural schematic view of the crushing cutter head in fig. 2;

fig. 5 is a schematic structural view of the hob fixing member provided by the present invention;

FIG. 6 is an enlarged view of the structure at A in FIG. 2;

FIG. 7 is a plan view of the crushing bin of FIG. 2;

FIG. 8 is an enlarged cross-sectional view taken at B in FIG. 7;

FIG. 9 is an enlarged view of the structure of FIG. 2 at C;

FIG. 10 is a schematic structural view illustrating another embodiment of a push bench according to the present invention;

reference numerals:

1, a pipe jacking machine; 101 a shell; 102 a tubular body; 11 a first tubular body; 12 a second tubular body; 13 a third tubular body; 14 a fourth tubular body; 111 an outer ring; 112 skis; 113 a water stop structure; 114 a sealing structure; 115. 117 oil holes; 116 shield tail brush; a 118 compartment divider; 121. 131 pneumatic bin gate; 2, a crushing device; 21 crushing the cutter head; 210 a cutter head body; 211 a first double-edged hob; 212 front side scraper; 213 an edge scraper; 214 second double-edged hob; 215 single-edged hob; 216 a locking block; 217 locking the bolt; 218U-shaped brackets; 219 disassembling the bolt; 22 a crushing bin; 221 cutter head bracket; 222 a feed inlet; 223 auxiliary feed inlet; 224 shredding the strips; 23 a muddy water bin; 231 a sludge discharge port; 3, a hollow rotating shaft; 31 a force transmission ring; 32 force transmission ring sealing rings; 321 water stop teeth; 322 oil holes; 33 a connecting structure; 4 a driving device; 41 a speed reducer; 42 a drive motor; 6 a manhole channel; 7, a deviation rectifying jack; 8, an electrical cabinet; 9, correcting a deviation power station; 10 hinged jacks;

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the present invention, unless otherwise stated, the use of the directional terms such as "upper, lower, top and bottom" generally refers to the directions shown in the drawings or the description of the mutual positional relationship of the components in the vertical, vertical or gravitational directions, wherein the use of the lateral direction refers to the direction consistent with the length of the lateral reinforcing bars and the longitudinal direction refers to the direction consistent with the length of the longitudinal reinforcing bars.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

As shown in FIG. 1, it is the structure schematic diagram of the spindle sealing structure of the push bench provided by the utility model. The push bench spindle sealing structure can be seen to comprise a sealing ring with a multi-tooth structure. The utility model provides an in the embodiment, the main shaft design is for the cavity pivot, can see in figure 1 the utility model provides a push bench main shaft seal structure includes dowel ring 31, is provided with dowel ring sealing washer 32 on the dowel ring 31, and dowel ring sealing washer 32 passes through connection structure 33 detachably and sets up on dowel ring 31, is provided with stagnant water tooth 321 on the dowel ring sealing washer 32, and the upper and lower of dowel ring 31 respectively is provided with one row of dowel ring sealing washer. In this embodiment, the connection structure may be a bolt and nut connection structure. Preferably, the upper and lower rows of force transmission ring sealing rings have the same structural composition, two ends of the upper and lower rows of force transmission ring sealing rings are symmetrical to each other in the vertical direction, and the upper and lower rows of force transmission ring sealing rings are parallel to each other in the horizontal direction. Further, for example, there are 3 power transmission ring seals 32 in each row of power transmission ring seals, and the widths of the power transmission ring seals 32 are the same as each other, for example, 105mm. Each force transmission ring sealing ring is provided with a plurality of water stopping teeth 321, for example, each force transmission ring sealing ring is provided with 4 water stopping teeth 321. Preferably, the water stopping teeth 321 of each force transmission ring seal ring are oriented in the same direction, have the same height and have the same distance. More preferably, the water stopping teeth 321 of each of the two upper and lower rows of power transmission ring sealing rings are oriented in the same direction, have the same height, and have the same distance. The arrangement ensures that external muddy water can reach the inside of the gear box of the hollow rotating shaft 3 only by passing 12 barriers, thereby better protecting the transmission system of the gear box. Alternatively, the force transmission ring seal 32 may be made of rubber, the height of the rubber may be 28mm, the assembly gap is 20mm, and the compression amount of the rubber reaches 28%. Preferably, in each row of force transmission ring sealing rings 32, an oil hole 322 between the two middle sealing rings can be used for introducing grease, and the grease is used as emergency pressure sealing and simultaneously used for lubricating, so that when the pipe jacking machine performs jacking operation by reducing the abrasion of a sealing element, a grease lubricating pump synchronously works, and the pressure is ensured to be always greater than the pressure of the soil cabin when the rubber sealing is in operation.

As shown in fig. 2 and fig. 3, fig. 2 is a schematic cross-sectional view of an overall structure of a long-distance pipe push bench provided by the present invention, and fig. 3 is a schematic structural view of a crushing device in fig. 2. As can be seen, in one embodiment, long reach push bench 1 includes tubular body 102, tubular body 102 includes first tubular body 11, second tubular body 12, and third tubular body 13, and first tubular body 11, second tubular body 12, and third tubular body 13 are articulated together along the direction that long reach push bench 1 advances according to the preface from front to back. The tail part of the first pipe body 11 is hinged 10 with the head part of the second pipe body 12 through a hinge jack, and the tail part of the second pipe body 12 is hinged with the head part of the third pipe body 13 through a hinge jack. The crushing device 2, the driving device 4 and the cabin partition plate 118 are arranged in the first pipe body 11, and the cabin partition plate 118 divides the first pipe body 11 into two independent cabin bodies. The driving device 4 is arranged on one side of the cabin partition plate 118 close to the advancing direction of the push bench, and the crushing device 2 is arranged on the other side of the cabin partition plate 118. The crushing device 2 is connected with a driving device 4 through a hollow rotating shaft 3, and the cutting and crushing actions are completed under the driving of the driving device 4. In order to keep the leakproofness between breaker 2 and the drive arrangement, adopted the utility model provides a push bench main shaft seal structure is provided with biography power ring 31 at cavity formula pivot 3, is provided with biography power ring seal 32 on the biography power ring 31.

In order to further increase the overall sealing performance of the push bench, the hinged position of the first pipe body 11 and the second pipe body 12 and the hinged position of the second pipe body 12 and the third pipe body 13 are respectively provided with a sealing structure 114, and the periphery of the third pipe body 13 is provided with a water stopping structure 113 and a shield tail brush 116. The first tube 11 and the second tube 12 are working chambers, and the third tube is an air pressure chamber.

In the above embodiment, long reach push bench 1 further includes housing 101. The shell 101 is integrally sleeved on the periphery of the pipe body 102; the outer diameter of the tubular body 102 is smaller than the outer diameter of the housing 101, i.e. a wall clearance is provided between the tubular body 102 and the housing 101. The pipe body 102 is a steel pipe with an inner diameter of 2000mm and an outer diameter of 2020mm. The inner diameter of the shell 101 is 40mm larger than the outer diameter of the pipe body, and the outer diameter of the shell 101 is 2080mm. A pipe wall gap is arranged between the pipe body 102 and the shell 101, and the gap has the function of forming an anti-attrition slurry sleeve of the pipe wall, so that the jacking force is reduced, and the one-time jacking distance is increased. The first tube 11, the second tube 12 and the third tube 13 are connected by 4 deviation-correcting oil cylinders distributed in a shape like a Chinese character 'jing', and a sealing structure 114 is arranged in a gap between the tubes. The seal 114 ensures that no leakage occurs in this gap during the correction process. In addition, the joint of the first pipe 11, the second pipe 12 and the third pipe 13 can be welded with a bolt of a deflection-preventing device, so that the relative deflection of the first pipe, the second pipe and the third pipe can be effectively prevented.

In the above embodiment, the end of the first pipe 11 is designed with an outer ring 111, a snowboard 112 is arranged at 120 degrees below the first pipe, and the outer ring 111 abuts against the snowboard. On one hand, the design can prevent the broken slag from flowing backwards, and the broken slag can fill the gap to block the push bench, so that the push bench cannot be pushed; on the other hand, since the cutting outer diameter of the crushing cutter disc 21 is much larger than the outer diameter of the casing 101, the outer ring 111 can facilitate the control of the posture of the push bench. And a deviation-rectifying jack 7 and a measuring system for adjusting the advancing angle of the push bench 1 are also arranged in the first pipe body 11. The measuring system comprises two parts, namely a measuring target arranged on the first pipe body 11, and an inclinometer and a pressure gauge arranged in the first pipe body 11. The laser beam of the full-automatic measuring instrument irradiates the measuring target, and the laser beam can be used for judging the tunneling direction, height deviation and deviation rectifying effects of the push bench 1. The inclinometer is also used to determine the horizontal attitude, pitch state, and yaw of the first pipe 11. The driving device 4 provided in the first pipe body 11 includes a speed reducer 41 and a driving motor 42 connected to the speed reducer 41, and the speed reducer 41 may be a planetary speed reducer.

An electrical cabinet 8, a deviation rectifying power station 9 connected with the deviation rectifying jack 7 and a hinged jack 10 arranged at the hinged position of the second pipe body 12 and the third pipe body 13 are arranged in the second pipe body 12. The third tube 13 may be provided with an air pressure chamber, and the joint of the second tube 12 and the third tube is provided with an air pressure chamber door 121, and the third tube is also provided with an air pressure chamber door 131. The sealing structure 114 comprises 3 sealing rings, and an oil filling hole 115 for injecting lubricating grease is designed between the sealing rings to ensure the reliability of sealing and to inject leakage-proof sealing grease by pressing in emergency. In addition, the shell 101 of the push bench 1 may further be provided with a sealing strip, the sealing strip may also need to be provided with a grease filling nozzle, and each sealing strip is circumferentially provided with 6 grease filling nozzles. Silicon ion oil is injected once per shift, so that the lubrication of the sealing strip is ensured, and the abrasion is reduced. In case of sealing strip abrasion to cause water stop failure, polyurethane can be filled into the filling nozzle for emergency water stop.

The crushing device 2 comprises a crushing cutter head 21, a crushing bin 22 and a muddy water bin 23. The primary crushing is finished by a cutting tool on the front surface of a crushing cutter disc 21, the secondary crushing is finished in a crushing bin 21, and crushed slag enters a muddy water bin 3 and is discharged by a conveying pipeline. The crushing cutter head 21 is arranged at the front end of the first pipe body 11 and is used for cutting rocks or soft soil layers; the front of the crushing cutter disc 21 is provided with cutters. As can be seen in fig. 3, in order to facilitate the tool change of the pipe push bench during operation, a manhole channel 6 is also provided in the crushing device 2. When the cutter of the crushing cutter disc 21 needs to be replaced during the operation of the push bench 11, an operator can enter the crushing bin through the manhole channel 6 to replace the cutter. The inner diameter of the manhole channel is 600mm. The size of the space on the back of the crushing disk 21 is D2008 x 600mm (without the cone), which space can accommodate 2 people for tool changing work.

As shown in fig. 4, fig. 4 is a front structural schematic view of the crushing cutterhead of fig. 2, and it can be seen that the crushing cutterhead 21 includes a cutterhead body 210 and cutters detachably fixed to the cutterhead body 210. The cutters include a first double-edged hob 211, a second double-edged hob 214, a single-edged hob 215, a face scraper 212 and an edge scraper 213. The first double-edged hob 211, the second double-edged hob 210, the edged hob 214, the front scraper 212 and the edge scraper 213 are fixed to the cutter head body 210 by fixing members, respectively. The first double edged hob 211 and the second double edged hob 215 are not of the same size. For example, the first double-edged hob may have a size of 12.5 inches, the second double-edged hob may have a size of 14 inches, and the single-edged hob may have a size of 14 inches, without limitation. In this embodiment, the cutting outer diameter of the crushing cutter disc is 60mm larger than the outer diameter of the housing 101, and the maximum cutting outer diameter of the crushing cutter disc 21 is 2140mm, which is effective in satisfying the boring requirement. In the embodiment shown in fig. 3, the crushing cutter head is provided with 10 roller cutters, including 8 roller cutters with 12.5 inch double-edged cutters and 2 roller cutters with 14 inch double-edged cutters, 14 inch single-edged cutters 2, edge scrapers 4 and straight-edged scrapers 16. The hob cutter is advanced 25mm from the scraper along the axial direction, so that rock breaking and tunneling are facilitated. The cutter pitch of the hob was 70mm, the diameter of the hob was 318mm, and the number of hobs N = D/2 λ (D is the cutter head diameter, λ is the hob pitch). In addition, wear-resistant cobalt-based welding materials or wear-resistant strips can be arranged on the front surface of the crushing cutter disc 21 and the surface of the outer ring to increase the wear resistance of the crushing cutter disc 21.

As shown in fig. 5, it is a schematic structural diagram of the fixing member for fixing the cutter on the crushing cutter disc 21 according to the present invention. The fixture can be seen to include a locking block 216, a locking bolt 217, a U-shaped bracket 218 and a removal bolt 219. A locking bolt 217 passes through the locking block 216 to secure the double-edged hob 211, 214 or the single-edged hob 215 to the cutterhead body 210. When the double-edged hob 211 and 214 or the single-edged hob 215 is removed, the lock bolts 217 are removed firstly, then the U-shaped bracket 218 is installed, the removal bolts 219 sequentially penetrate through the U-shaped bracket 218 and the locking block 216, and the double-edged hob 211 and 214 or the single-edged hob 215 can be removed by rotating the removal bolts 219 and pulling out the locking block 216. When the geology that passes through is converted to soft soil layer from the stratum, the hobbing cutter will lose efficacy, can pull down the hobbing cutter at this moment, changes reserve goat's horn type scraper, and the pipe pushing jack just can satisfy and has been under construction in soft soil layer like this.

As shown in fig. 6, 7 and 8, fig. 6 is an enlarged schematic view of a portion a in fig. 1, fig. 7 is a schematic view of a plan structure of the crushing bin 22, and fig. 8 is an enlarged schematic view of a portion B in fig. 7. It can be seen that the crushing bin 22 comprises a housing cone and a cutter head bracket 221, and the housing cone is provided with crushing strips 224, a feed port 222 and an auxiliary feed port 223. After the primary crushing is completed by the cutting tool on the front surface of the crushing cutter head, the primarily crushed rock enters the crushing bin 22 and is secondarily crushed by the cutter head corbel 211, the shell cone and the crushing strip 224. The crushed slag after the secondary crushing enters the muddy water bin 23 through the slag inlet hole and is discharged through the mud discharging channel 231. The inner diameters of the feeding hole and the auxiliary feeding hole are 100mm, the inner diameter of the slag inlet hole is 45mm, and broken particles can enter the muddy water bin 23 through the slag inlet hole and then are discharged through the mud discharge channel 231 only if the broken particles are smaller than the diameter of the slag inlet hole. In this embodiment, the muddy water sump 23 is an annular three-dimensional space, the inner diameter is 1050mm, the outer diameter is 1990mm, the length is 250mm, and the volume of the space is 0.56 cubic meter.

Fig. 9 is an enlarged schematic structural diagram at C in fig. 1, and it can be seen that the water stopping structure 113 disposed at the front end of the third pipe 13 includes two external-supporting air-bag-shaped rubber water stopping rings, where the width d1 of each external-supporting air-bag-shaped rubber water stopping ring is 40mm, and the thickness d2 is 70mm. The water stopping structure 113 can be used to stop the water from being discharged from the outside of the pipe wall behind the pipe body 101, so that the operator can smoothly enter the rear of the cutter head for tool changing operation.

As shown in fig. 10, fig. 10 is a schematic structural diagram illustrating another embodiment of the long-distance pipe push bench provided by the present invention. The long reach push bench 1 provided in this embodiment further includes a sub push stop ring 14 on the structure of the push bench 1 shown in fig. 1, and the sub push stop ring 14 is provided with an articulated jack 10 therein and is articulated with the third pipe body 13 by the articulated jack 10. The periphery of the auxiliary thrust ring is provided with a shield tail brush 116, and oil filling holes 117 are uniformly arranged in the gap of the shield tail brush 116 along the circumferential direction. The length of the auxiliary thrust ring 14 is 2060mm, the connection form of the auxiliary thrust swivel ring 14 is an F-shaped interface socket type, and the ejection force of the auxiliary thrust stroke of 300mm is 4 multiplied by 1500KN. In the construction, the soft-hard junction is slowly jacked by adopting a push rotation-stopping ring. When the crushing cutter disc 21 is used for changing the cutter, the auxiliary push oil cylinder of the auxiliary push stop ring retracts and pulls back the push bench 1, so that the cutter changing operation is facilitated.

The utility model provides a push bench main shaft seal structure, simple structure, manufacturing convenience, leakproofness are good, and have fine wearability, are favorable to the sealing of push bench main shaft.

The utility model provides a long distance pipe pushing jack, its sealed design can improve the complete machine reliability for the form that multiple sealed combination got up. The crushing cutter head is provided with a plurality of hobs, so that uniform and efficient cutting treatment is formed on rocks in the cutting processing process of the long-distance pipe jacking machine on rock geology, and the smooth jacking of a pipe body of the pipe jacking machine is further ensured; meanwhile, the rock fragments subjected to secondary crushing treatment in the crushing bin can be crushed into more delicate rock fragments, so that the rock fragments are mixed with slurry in the slurry bin and enter the sludge discharge channel, and the blockage phenomenon is avoided when the slurry is discharged out of the pipe jacking equipment. The long-distance pipe pushing jack provided by the utility model has good sealing performance, compact structure of the crushing device and the driving device and strong bearing capacity; the crushing device is provided with a manhole channel, so that a worker can enter the cutter head to observe, check and replace the worn cutter, and the tunneling work is favorably and smoothly carried out; and the cutter can be replaced according to the whole or part of the stratum structure, so that the construction efficiency is improved, and the construction cost of the pipe jacking machine is controlled.

The above description is provided for the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be implemented by various simple modifications, which all belong to the protection scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims (10)

1. A push bench main shaft sealing structure is characterized by comprising a force transmission ring, wherein a force transmission ring sealing ring is arranged on the force transmission ring; the upper and lower rows of the force transfer ring are respectively provided with a row of force transfer ring sealing rings, the structure composition of the upper and lower rows of the force transfer ring sealing rings is completely the same, the two ends of the upper and lower rows of the force transfer ring sealing rings are symmetrical to each other in the vertical direction, and the upper and lower rows of the force transfer ring sealing rings are parallel to each other in the horizontal direction; each row of force transmission ring sealing rings comprises a plurality of force transmission ring sealing rings, the width of each force transmission ring sealing ring is the same as that of each other, and each force transmission ring sealing ring is provided with a plurality of water stopping teeth; the water stopping teeth at multiple positions of each force transmission ring sealing ring are same in orientation, height and distance.

2. The push bench spindle seal structure of claim 1, wherein said force transfer ring seal rings are arranged on said force transfer rings by a connecting structure, and oil holes are arranged between said force transfer ring seal rings.

3. A long-distance pipe jacking machine is characterized by comprising a first pipe body, a second pipe body and a third pipe body; the first pipe body, the second pipe body and the second pipe body are sequentially hinged in pairs along the advancing direction of the push bench, a crushing device, a driving device and a cabin partition plate are arranged in the first pipe body, the first pipe body is divided into two cabins by the cabin partition plate, the driving device is arranged on one side of the cabin partition plate, and the crushing device is arranged on the other side of the cabin partition plate; the crushing device is connected with the driving device through a hollow rotating shaft and finishes cutting and crushing actions under the driving of the driving device; and the hollow rotating shaft is provided with the push bench spindle sealing structure as claimed in claim 1.

4. The long reach push bench of claim 3 wherein said first and second tubular bodies are each provided with a sealing structure at a hinge joint and said second and third tubular bodies are each provided with a sealing structure at a hinge joint; the first pipe body and the second pipe body are working cabins; the third pipe body is an air pressure cabin; and a water stopping structure and a shield tail brush are arranged on the periphery of the third pipe body.

5. The long reach push bench of claim 3 wherein said crushing means comprises a crushing cutter head, a crushing bin and a mud bin; the crushing cutter head is arranged at one end of the first pipe body; the crushing cutter head comprises a cutter head body and a cutter fixed on the cutter head body; the cutter comprises a first double-edged hob, a second double-edged hob, a single-edged hob, a front scraper and an edge scraper; the double-edged hob and the single-edged hob are fixed through a fixing piece respectively; broken blade disc carries out first breakage to the rock, just breaker still is provided with and is used for changing the manhole passageway of cutter.

6. The long reach push bench of claim 5 wherein said fasteners comprise locking blocks, locking bolts, U-shaped brackets and dismantling bolts, said locking bolts pass through said locking blocks to fix said double-edged hob or said single-edged hob to said cutterhead body, said dismantling bolts pass through said U-shaped brackets and said locking blocks in sequence to dismantle said double-edged hob or said single-edged hob.

7. The long-distance pipe jacking machine as claimed in claim 5 or 6, wherein said crushing bin comprises a shell cone and a cutter head bracket, the shell cone is provided with crushing strips, a feed inlet and an auxiliary feed inlet, and the mud-water bin is provided with a mud discharge channel; and the sludge subjected to secondary crushing in the crushing bin enters the muddy water bin and is discharged through the sludge discharge channel.

8. The long reach push bench of claim 4 wherein the water stop structure comprises two externally supported air bag-like rubber water stops, the externally supported air bag-like rubber water stops having a thickness of 70mm and a width of 40mm.

9. The long reach push bench of claim 3, wherein an outer ring is disposed on an outer circumference of the first tube and a ski is disposed on the first end of the first tube, the ski abutting the outer ring.

10. The long distance pipe jacking machine of claim 3, further comprising a secondary push stop ring, wherein an articulated jack is arranged in the secondary push stop ring and is articulated with the third pipe body through the articulated jack, a shield tail brush is arranged on the periphery of the secondary push stop ring, and oil filling holes are uniformly arranged in the gap of the shield tail brush along the circumferential direction.

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