CN221957571U - Variable-diameter vertical shaft tunneling equipment - Google Patents

Abstract

The utility model provides variable-diameter vertical shaft tunneling equipment, which comprises the following components: the system comprises a pipe piece system and a pressure lifting device, wherein the pressure lifting device is connected with the pipe piece system and used for driving the pipe piece system to move downwards along a vertical shaft; the excavating system comprises a supporting device, a driving device and an excavating device, wherein the supporting device is arranged on the duct piece system, the excavating device is rotatably arranged on the supporting device, and the driving device is connected with the excavating device to drive the excavating device to rotate; the excavating device comprises a front end excavating blade and a variable-diameter excavating blade, wherein the variable-diameter excavating blade can move radially relative to the rotation axis of the excavating device in a controlled manner, and the front end excavating blade is arranged in front of the variable-diameter excavating blade along the rotation axis direction of the excavating device, so that the technical problem that in the prior art, shaft excavation is difficult to be suitable for efficient construction of shafts with different diameters is solved.

Description

Variable-diameter vertical shaft tunneling equipment

Technical Field

The utility model relates to the technical field of tunnel construction, in particular to variable-diameter vertical shaft tunneling equipment.

Background

In municipal and tunnel engineering, shafts are required for various functions, such as ventilation shafts, underground logistics shafts, drainage shafts, shaft storage houses, etc. However, the construction sizes of the shafts with different functions are different, the existing shaft construction equipment cannot meet the shaft construction of various diameters, the tunneling diameter of the equipment is single, meanwhile, the tunneling energy consumption of the equipment is high, the construction rotation torque is large, and the equipment cannot be suitable for hard strata or soft rock. In addition, the existing shaft mechanized equipment is large in size and weight, is not easy to construct and turn around in urban areas, and is high in equipment cost and construction cost.

The invention discloses a 360-degree full-rotation round vertical shaft pipe shaking machine and a construction method, wherein the machine comprises a base, a lifting oil cylinder, a lifting seat and the like, a large gear ring is arranged at the hole wall of a round through hole on the lifting seat, a clamping ring for clamping round pipe fittings is arranged on the large gear ring, the clamping ring is tightened through the clamping oil cylinder, the lifting seat drives the large gear ring to rotate through a motor, and then the clamping ring and the round pipe fittings do 360-degree full-rotation movement, so that the construction requirement of a small-caliber round vertical shaft can be met.

The Chinese patent application No. CN202210222210.X discloses an automatic well entering and exiting device, a shaft heading machine and a shaft construction method, wherein a guide rail is arranged on the inner wall surface of a shaft along the axial direction of the shaft, an active travelling mechanism can move up and down along the guide rail, and the shaft heading machine is driven to enter the shaft downwards or go out of the shaft upwards along the axial direction of the shaft through the active travelling mechanism.

The utility model patent CN202120686444.0 discloses a vertical shaft heading machine which comprises a main rotary device, a heading device and a supporting device, wherein the supporting device is arranged around the main rotary box and is connected with the bottom of a vertical shaft wall; 2 tunneling devices are symmetrically arranged in the vertical shaft heading machine, so that symmetrical excavation is realized, and the working mode that the heading head sweeps across the heading face is realized, so that the heading face approaches to a planar design.

In conclusion, the shaft tunneling in the prior art is difficult to be suitable for efficient construction of shafts with different diameters.

Disclosure of utility model

The utility model aims to provide variable-diameter shaft tunneling equipment, which solves the technical problem that shaft tunneling in the prior art is difficult to be suitable for efficient construction of shafts with different diameters.

The above object of the present utility model can be achieved by the following technical solutions:

The utility model provides variable-diameter vertical shaft tunneling equipment, which comprises the following components: the device comprises a pressure lifting system and an excavating system, wherein the pressure lifting system comprises a duct piece system and a pressure lifting device, and the pressure lifting device is connected with the duct piece system and is used for driving the duct piece system to move downwards along a vertical shaft;

The excavating system comprises a supporting device, a driving device and an excavating device, wherein the supporting device is arranged on the duct piece system, the excavating device is rotatably arranged on the supporting device, and the driving device is connected with the excavating device to drive the excavating device to rotate; the excavating device comprises a front end excavating blade and a reducing excavating blade, wherein the reducing excavating blade can move radially relative to the rotation axis of the excavating device in a controlled manner, and the front end excavating blade is arranged in front of the reducing excavating blade along the rotation axis direction of the excavating device.

In a preferred embodiment, the excavation device includes a first cylindrical housing, and the front end and the variable diameter excavation blades are both provided on an outer periphery of the first cylindrical housing; the side wall of the first cylindrical shell is provided with a slag inlet.

In a preferred embodiment, the front end of the first cylindrical housing is an opening; and a preset distance is arranged between the front end digging blade and the front end face of the first cylindrical shell.

In a preferred embodiment, the excavation device comprises a cutter head bracket fixed on the first cylindrical shell, a chute extending along the radial direction is arranged on the cutter head bracket, the variable-diameter digging blade is installed on the chute, and a first driving mechanism is connected with the variable-diameter digging blade to drive the variable-diameter digging blade to move along the chute.

In a preferred embodiment, the support means comprises a second cylindrical housing, the first cylindrical housing being rotatably mounted to the second cylindrical housing; the second cylindrical shell is vertically communicated and communicated with the interior of the first cylindrical shell.

In a preferred embodiment, the first cylindrical housing is connected to the second cylindrical housing by a bearing, and the axes of the two are parallel or coincident.

In a preferred embodiment, the inner wall of the segment system is fixedly provided with a torque limiting device, and the second cylindrical shell is connected to the torque limiting device through an anti-torsion beam.

In a preferred embodiment, the torque limiting device is provided with a limiting groove, and the outer end of the anti-torsion beam is arranged in the limiting groove; or the outer end of the anti-torsion beam is connected with the torque limiting device through a pin shaft which is vertically arranged.

In a preferred embodiment, the pressure lifting system comprises a plurality of back pressure mechanisms, wherein the back pressure mechanisms comprise back pressure cylinders, supporting pieces and pin rods, the pin rods are used for being detachably connected with the pipe pieces in the pipe piece system, and are mounted on the supporting pieces, and the back pressure cylinders are connected with the supporting pieces to drive the supporting pieces to move up and down; the back pressure mechanisms are circumferentially distributed at intervals around the rotation axis of the excavating device.

In a preferred embodiment, the variable diameter shaft boring apparatus comprises a slag tapping system comprising a lifting device and a hydraulic grab, the lifting device being connected to the hydraulic grab to drive the hydraulic grab to move up and down in the shaft.

The utility model has the characteristics and advantages that:

In the tunneling process of the variable-diameter shaft tunneling equipment, the lifting and pressing system drives the excavating device to move downwards, meanwhile, the driving device drives the excavating device to rotate, the front end excavating blade firstly excavates the stratum, then the variable-diameter excavating blade performs excavating to enlarge the diameter of the excavated shaft, and the variable-diameter excavating blade can move along the radial direction to adjust the radial position of the variable-diameter excavating blade, so that the diameter of the excavated shaft is controlled.

The front end digging blade and the variable-diameter digging blade form a multi-stage blade with a contractible and expandable diameter, so that the torque required by digging is reduced in the vertical shaft digging process, and the stratum characteristic of the variable-diameter vertical shaft digging equipment can be improved, namely, the variable-diameter vertical shaft digging equipment can be applied to not only soil layers, but also soft rock and more extensive stratum. By adopting the variable-diameter shaft tunneling equipment, efficient construction of shafts with different diameters can be performed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a construction schematic diagram of variable diameter shaft driving equipment provided by the utility model;

fig. 2 is a top view of the variable diameter shaft driving device provided by the utility model;

FIG. 3 is a schematic diagram of the completion of shaft construction of the variable diameter shaft tunneling device provided by the utility model;

fig. 4 is a top view of another embodiment of the variable diameter shaft driving apparatus provided by the present utility model.

Reference numerals illustrate:

1. A steel shell with an open front end;

2. A front end digging cutter blade;

3. Reducing digging knife wing; 301. a chute; 302. an oil cylinder; 303. a cutterhead bracket;

5. a rotating bearing; 6. A driving device;

70. An excavating device; 7. A first cylindrical housing; 4. A slag inlet;

80. a support device; 8. A second cylindrical housing;

9. a torque limiting device; 901. a limit groove;

10. a torsion-resistant beam; 11. A pin shaft;

120. a duct piece system; 12. A blade foot; 13. A shaft segment;

140. A pressure increasing system; 14. A pin rod;

150. a back pressure mechanism; 15. A back pressure cylinder; 16. A support frame;

17. A lifting device; 18. A hydraulic grab;

19. A locking collar beam; 20. a shaft floor.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides variable-diameter shaft tunneling equipment, which is shown in figures 1-4 and comprises the following components: the system comprises a pressure lifting system 140 and an excavating system, wherein the pressure lifting system 140 comprises a duct piece system 120 and a pressure lifting device, and the pressure lifting device is connected with the duct piece system 120 and is used for driving the duct piece system 120 to move downwards along a vertical shaft; the excavating system comprises a supporting device 80, a driving device 6 and an excavating device 70, wherein the supporting device 80 is arranged on the duct piece system 120, the excavating device 70 is rotatably arranged on the supporting device 80, and the driving device 6 is connected with the excavating device 70 to drive the excavating device 70 to rotate; the excavating device 70 includes a front end cutting blade 2 and a variable diameter cutting blade 3, the variable diameter cutting blade 3 being controllably movable in a radial direction with respect to the rotational axis of the excavating device 70, and the front end cutting blade 2 being disposed in front of the variable diameter cutting blade 3 in the rotational axis direction of the excavating device 70.

In the tunneling process of the variable-diameter shaft tunneling equipment, the pressure increasing system 140 drives the excavating device 70 to move downwards, meanwhile, the driving device 6 drives the excavating device 70 to rotate, the front end tunneling blade 2 firstly performs tunneling on a stratum, then the variable-diameter tunneling blade 3 performs tunneling so as to enlarge the diameter of a tunneling shaft, and the variable-diameter tunneling blade 3 can move along the radial direction so as to adjust the radial position of the variable-diameter tunneling blade 3, so that the diameter of the tunneling shaft is controlled.

The front end digging knife wing 2 and the variable diameter digging knife wing 3 form a multi-stage knife wing with a contractible and expandable diameter, so that the torque required by the digging is reduced in the vertical shaft digging process, the stratum characteristic of the variable diameter vertical shaft digging equipment can be improved, namely, the variable diameter vertical shaft digging equipment can be applied to not only soil layers, but also soft rock and more extensive stratum. By adopting the variable-diameter shaft tunneling equipment, efficient construction of shafts with different diameters can be performed.

In one embodiment, the excavating device 70 includes a first cylindrical housing 7, and the front end cutting blade 2 and the diameter-variable cutting blade 3 are both disposed on the outer periphery of the first cylindrical housing 7; the side wall of the first cylindrical shell 7 is provided with a slag inlet 4, and soil body falls into the first cylindrical shell 7 through the slag inlet 4 under the cutting disturbance of the excavating device 70, so that the excavated soil body is discharged conveniently, and the excavating device 70 is guaranteed to excavate smoothly downwards. Preferably, the first cylindrical housing 7 is provided with a plurality of slag inlets 4 at intervals in the circumferential direction.

Further, the front end of the first cylindrical housing 7 is an opening; and, a predetermined distance is provided between the front end cutting blade 2 and the front end surface of the first cylindrical housing 7. When the first cylindrical housing 7 moves downward, the front end of the first cylindrical housing can be inserted into the stratum first, and then the front end of the first cylindrical housing 2 and the diameter-variable cutting blade 3 are cut. As shown in fig. 1, the front end digging blade 2 is positioned on the side surface of the middle part of the first cylindrical shell 7 and is used for expanding and digging soil in the middle part of the section of the vertical shaft; the diameter-variable digging knife wing 3 is arranged at the top of the first cylindrical shell 7 and used for digging soil around the section of the vertical shaft.

Preferably, the front end of the first cylindrical shell 7 is provided with a front-end open steel shell 1 so as to be inserted into the stratum first; the front end digging cutter wing 2 and the reducing digging cutter wing 3 are arranged along the periphery of the first cylindrical shell 7, and the middle part of the first cylindrical shell 7 is of a hollow structure and is used for digging soil in the middle part of a vertical shaft in advance. The front end cutting blade 2 is preferably a front end expanding cutting blade.

In one embodiment, the excavating device 70 comprises a cutter bracket 303 fixed on the first cylindrical shell 7, a chute 301 extending along the radial direction is arranged on the cutter bracket 303, the variable-diameter cutting blade 3 is mounted on the chute 301, and a first driving mechanism is connected with the variable-diameter cutting blade 3 to drive the variable-diameter cutting blade 3 to move along the chute 301 so as to adjust the radial position of the variable-diameter cutting blade 3, thereby controlling the diameter of the excavated shaft. The first drive mechanism is preferably a cylinder 302. The movement direction of the sliding chute 301 and the oil cylinder 302 is set along the radial direction, and the specific direction may be the radial direction of the excavating device 70, or some deviation exists relative to the radial direction of the excavating device 70.

As shown in fig. 1, the variable-diameter cutting blade 3 is disposed on the cutter bracket 303 and is connected with the first cylindrical housing 7 through the oil cylinder 302, the cutter bracket 303 is fixedly disposed on the first cylindrical housing 7, and plays a certain supporting role on the variable-diameter cutting blade 3, so as to improve the capability of the variable-diameter cutting blade 3 in resisting external shearing force and torque, one side of the variable-diameter cutting blade 3 is provided with a sliding rail matched with the sliding groove 301, and the variable-diameter cutting blade 3 moves along the sliding groove 301 on the cutter bracket 303 under the action of the oil cylinder 302 so as to cut soil with a larger area, thereby forming a shaft section.

According to the variable-diameter shaft tunneling equipment provided by the utility model, the diameter expansion and the diameter reduction of the tunneling device can be realized through the variable-diameter tunneling knife blade 3, the variable-diameter shaft tunneling equipment can be suitable for the excavation of shafts with different diameters, and the stratum and the shaft section have wider applicability; the multistage blade cutting soil body can reduce construction torque, effectively reduce energy consumption, save energy, is low-carbon and environment-friendly, and realizes low carbon, safety and high efficiency of shaft construction. The duct piece system 120 comprises a plurality of shaft duct pieces 13 and cutting edges 12, the cutting edges 12 are located at the bottom ends of the shaft duct pieces 13, as shown in fig. 1, when tunneling is performed, the cutting edges 12 are located in front of the shaft duct pieces 13, soil at the bottoms of the cutting edges 12 is excavated through the reducing tunneling knife wings 3, so that the shaft duct pieces 13 can be conveniently and underground pressed to form support, and the method is applicable to excavation of shafts with different diameters.

In one embodiment, the support device 80 includes a second cylindrical housing 8, the first cylindrical housing 7 being rotatably mounted to the second cylindrical housing 8; the second cylindrical housing 8 is vertically penetrating and communicates with the inside of the first cylindrical housing 7. The driving device 6 drives the first cylindrical shell 7 to rotate, and then drives the blades to rotationally cut soil, and the excavated soil can enter the first cylindrical shell 7 and the second cylindrical shell 8 so as to facilitate slag tapping.

Further, the first cylindrical shell 7 is connected with the second cylindrical shell 8 through a bearing, the axes of the first cylindrical shell 7 and the second cylindrical shell are parallel or coincide, soil mass entering the first cylindrical shell 7 can enter the second cylindrical shell 8 along with the continuous downward tunneling of the variable-diameter shaft tunneling equipment, and the smoothness of slag tapping is ensured. The movable part of the rotary bearing 5 is connected with the first cylindrical shell 7, the driving device 6 drives the first cylindrical shell 7 to rotate, the second cylindrical shell 8 plays a supporting role, and the rotary bearing 5 plays a role in guiding rotary motion.

Specifically, the driving device 6 may adopt a motor, and the motor drives the gear to rotate and transmit force to the first cylindrical shell 7, so as to drive the first cylindrical shell 7 to rotate, thereby realizing shaft excavation. The drive means 6 may take other forms as well, without limitation.

In one embodiment, the torque limiting device 9 is fixed on the inner wall of the segment system 120, and the second cylindrical shell 8 is connected to the torque limiting device 9 through the anti-torsion beam 10. The anti-torsion beam 10 is connected with a torque limiting device 9 arranged on the inner wall of a vertical shaft segment 13 in the segment system 120 and used for resisting the anti-torque generated when the excavation system excavates a vertical shaft downwards, and the excavation system is connected with the vertical shaft segment 13 to realize downward movement along with the vertical shaft segment 13.

Further, as shown in fig. 2, the outer end of the anti-torsion beam 10 is connected with the torque limiting device 9 through a vertically arranged pin shaft 11, so that the anti-torsion beam can be used for resisting the anti-torsion generated when the excavation system excavates the vertical shaft downwards, and meanwhile, the excavation system is convenient to dismantle after the construction of the vertical shaft is completed. Specifically, the torque limiting device 9 includes a connection block. Preferably, the second cylindrical shell 8 is provided with a plurality of anti-torsion beams 10, and the other ends of the anti-torsion beams 10 are connected with connecting blocks arranged on the inner wall of the vertical shaft segment 13 through pin shafts 11.

In another embodiment, the torque limiting device 9 is provided with a limiting groove 901, the outer end of the anti-torsion beam 10 is arranged in the limiting groove 901, and the anti-torsion beam 10 is clamped into the limiting groove 901 to limit the rotation of the second cylindrical shell 8, so that the anti-torque generated by the shaft tunneling equipment due to soil excavation is resisted. Preferably, as shown in fig. 4, the limit groove 901 is U-shaped.

In one embodiment, the pressure raising system 140 includes a plurality of back pressure mechanisms 150, the back pressure mechanisms 150 include a back pressure cylinder 15, a support member, and a pin 14, the pin 14 is detachably connected to a tube sheet in the tube sheet system 120, and the pin 14 is mounted on the support member, and the back pressure cylinder 15 is connected to the support member to drive the support member to move up and down; a plurality of counter-pressure mechanisms 150 are circumferentially spaced about the axis of rotation of the cutting device 70. In order to realize staggered joint assembly of the vertical shaft duct pieces 13, the back pressure cylinders 15 are divided into two groups for alternate use; the back pressure oil cylinder 15 is provided with a support piece, the support piece is provided with a through hole for installing the pin rod 14, and the back pressure oil cylinder 15 can drive the support piece to move up and down; the pin rod 14 passes through the through hole of the supporting piece and is inserted into the grouting hole of the vertical shaft segment 13, and the supporting piece and the pin rod 14 are driven under the telescopic action of the back pressure oil cylinder 15, so that the vertical shaft segment 13 synchronously and integrally moves downwards or is in static balance.

Through the pressure lifting system 140, the deflection of the vertical shaft can be effectively controlled, the controllable well wall descending is realized, and the verticality of the vertical shaft can be ensured. Specifically, by independently controlling each back pressure cylinder 15 distributed around the vertical shaft segment 13, the vertical sinking precision of the shaft can be controlled, and the vertical shaft segment has a certain deviation rectifying function. For example, the back pressure cylinders 15 are arranged in a plurality of areas on the periphery of the vertical shaft segment 13, and when the vertical shaft segment 13 sinks to a large extent along a certain area in the circumferential direction, the back pressure cylinders 15 in the area can be controlled to control up and down so as to realize deviation correction.

Specifically, the back pressure cylinders 15 are arranged on the locking collar beam 19 at intervals around the shaft segment 13, and the bottom ends thereof are anchored in the locking collar beam 19. The back pressure cylinders 15 are arranged in groups, and each group of cylinders comprises 2 back pressure cylinders 15, 1 pin 14 and 1 support member, and the two back pressure cylinders 15 jointly control the 1 pin 14 and the 1 support member. The support is preferably a support bracket 16.

In one embodiment, the variable diameter shaft boring apparatus comprises a slag tapping system comprising a lifting device 17 and a hydraulic grab 18, the lifting device 17 being connected to the hydraulic grab 18 to drive the hydraulic grab 18 up and down in the shaft. The hydraulic grab 18 grabs and transports the residue from the first cylindrical housing 7 or the second cylindrical housing 8 to the ground during the downward excavation of the shaft. The centers of the second cylindrical shell 8, the rotary bearing 5 and the first cylindrical shell 7 are hollow, so that the hydraulic grab 18 is convenient for grabbing slag, and soil body can fall into the first cylindrical shell 7 through the slag inlet 4 under the cutting disturbance of the excavating device 70. The lifting device 17 may be arranged on a locking collar 19 and the hydraulic grab 18 is mounted on the lifting device 17. The lifting device 17 can adopt a gantry crane mode, and specifically comprises a motor, a steel wire rope and the like, the hydraulic grab 18 is arranged at the lower end of the steel wire rope, and the motor drives the steel wire rope to move up and down so as to drive the hydraulic grab 18 to move up and down. Other configurations of the lifting device 17 are possible and are not limited in this regard.

In the variable diameter shaft tunneling device, a digging device 70 is arranged on a first cylindrical shell 7, a driving device 6 is arranged on a second cylindrical shell 8, and a slag discharging system and a pressure increasing system 140 are arranged on the ground. The excavation system of the variable-diameter shaft tunneling equipment has the advantages of small volume, flexible transportation and flexible construction, and has low manufacturing cost.

A waterproof cover (such as a mechanical structure protective shell) can be arranged on the outer side of the driving device 6, so that the driving device 6 can be waterproof in construction, and the driving device can still work normally after being submerged by underground water.

The construction method of the variable diameter shaft tunneling device comprises the following steps:

s1, installing tunneling equipment;

Specifically, a locking collar beam 19 is applied to the ground, annular cutting edges 12 and a plurality of rings of shaft segments 13 are arranged in the locking collar beam 19, and torque limiting devices 9 corresponding to the anti-torsion cross beams 10 are circumferentially arranged on the inner wall of the shaft segment 13 connected with the cutting edges 12;

The lifting device 17 and the lifting system 140 are arranged around the locking collar beam 19, and the pin rod 14 is inserted into a grouting hole of the vertical shaft segment 13 through the supporting frame 16, so that the vertical shaft segment 13 is in a static balance state;

lifting the whole excavation system into the vertical shaft duct piece 13 by using a lifting device 17, so that the diameter-variable digging and cutting blade 3 is positioned below the cutting edge 12, and simultaneously connecting the anti-torsion beam 10 with the torque limiting device 9;

S2, excavating a vertical shaft;

Specifically, the driving device 6 is started to rotate the excavating device 70, and the oil cylinder 302 is utilized to enable the diameter-variable excavating and cutting blade 3 to extend outwards to the bottom of the cutting foot 12 in the diameter direction;

the vertical shaft segment 13 is pressed down by using one group of counter-pressure cylinders 15 on the ground to move downwards through the pin rods 14, and the vertical shaft segment 13 drives the whole excavation system to move downwards through the torque limiting device 9 so as to excavate the vertical shaft;

In the downward tunneling process, the tunneling knife wing drives the disturbed soil body to fall into the first cylindrical shell 7 through the slag inlet 4, and the hydraulic grab 18 is utilized to slag upwards;

s3, installing a vertical shaft segment 13;

Specifically, after the height of a ring of vertical shaft duct pieces 13 is excavated downwards, splicing a next ring of vertical shaft duct pieces 13 above the top vertical shaft duct piece 13 by using a lifting device 17, splicing vertical shaft duct pieces 13 adjacent to each other in a staggered manner, and connecting the upper ring of vertical shaft duct pieces 13 and the lower ring of vertical shaft duct pieces 13;

Inserting the pin rods 14 of the other group of counter-pressure cylinders 15 on the ground into grouting holes of the newly assembled vertical shaft segments 13, and then pulling out the pin rods 14 in the vertical shaft segments 13 of the previous ring from the grouting holes;

S4, circularly utilizing the pressure increasing system 140 and the slag discharging system, tunneling downwards, slag discharging and duct piece assembling until the construction depth of the vertical shaft reaches a design value; the oil cylinder 302 is utilized to retract the variable-diameter digging knife wing 3 into the vertical shaft segment 13, and simultaneously the anti-torsion beam 10 is detached from the torque limiting device 9;

s5, lifting the excavation system from the bottom of the well to the ground by using the lifting device 17, pouring the shaft bottom plate 20 as shown in fig. 3, and finally removing the lifting device 17, the back pressure oil cylinder 15 and other devices to finish shaft construction.

Aiming at the problems that the construction of shafts with different diameters cannot be dealt with, the construction energy consumption is high, the construction action torque is large and the like in the shaft construction, the variable-diameter shaft tunneling equipment provided by the utility model can ensure that the shaft tunneling realizes low energy consumption, low torque and moderate manufacturing cost, and is applicable to the shaft construction with different diameters and wider stratum conditions.

The foregoing is merely a few embodiments of the present utility model and those skilled in the art may make various modifications or alterations to the embodiments of the present utility model in light of the disclosure herein without departing from the spirit and scope of the utility model.

Claims (10)

1. A variable diameter shaft boring apparatus, comprising: the device comprises a pressure lifting system and an excavating system, wherein the pressure lifting system comprises a duct piece system and a pressure lifting device, and the pressure lifting device is connected with the duct piece system and is used for driving the duct piece system to move downwards along a vertical shaft;

The excavating system comprises a supporting device, a driving device and an excavating device, wherein the supporting device is arranged on the duct piece system, the excavating device is rotatably arranged on the supporting device, and the driving device is connected with the excavating device to drive the excavating device to rotate; the excavating device comprises a front end excavating blade and a reducing excavating blade, wherein the reducing excavating blade can move radially relative to the rotation axis of the excavating device in a controlled manner, and the front end excavating blade is arranged in front of the reducing excavating blade along the rotation axis direction of the excavating device.

2. Variable diameter shaft boring apparatus according to claim 1, wherein,

The excavating device comprises a first cylindrical shell, and the front end excavating blade and the diameter-variable excavating blade are arranged on the periphery of the first cylindrical shell;

The side wall of the first cylindrical shell is provided with a slag inlet.

3. Variable diameter shaft boring apparatus according to claim 2, wherein,

The front end of the first cylindrical shell is an opening;

And a preset distance is arranged between the front end digging blade and the front end face of the first cylindrical shell.

4. A variable diameter shaft boring machine according to claim 2 or 3, wherein,

The excavating device comprises a cutter disc bracket fixed on the first cylindrical shell, a chute extending along the radial direction is arranged on the cutter disc bracket, the variable-diameter excavating knife wing is arranged on the chute, and a first driving mechanism is connected with the variable-diameter excavating knife wing to drive the variable-diameter excavating knife wing to move along the chute.

5. A variable diameter shaft boring machine according to claim 2 or 3, wherein,

The support device comprises a second cylindrical shell, and the first cylindrical shell is rotatably mounted on the second cylindrical shell;

The second cylindrical shell is vertically communicated and communicated with the interior of the first cylindrical shell.

6. Variable diameter shaft boring machine according to claim 5, characterised in that,

The first cylindrical shell is connected with the second cylindrical shell through a bearing, and the axes of the first cylindrical shell and the second cylindrical shell are parallel or coincide.

7. Variable diameter shaft boring machine according to claim 5, characterised in that,

The inner wall of the duct piece system is fixedly provided with a torque limiting device, and the second cylindrical shell is connected with the torque limiting device through a reverse torsion beam.

8. Variable diameter shaft boring machine according to claim 7, characterised in that,

The torque limiting device is provided with a limiting groove, and the outer end of the anti-torsion beam is arranged in the limiting groove;

or the outer end of the anti-torsion beam is connected with the torque limiting device through a pin shaft which is vertically arranged.

9. A variable diameter shaft boring machine according to any one of claims 1 to 3,

The pressure lifting system comprises a plurality of back pressure mechanisms, wherein each back pressure mechanism comprises a back pressure oil cylinder, a support piece and a pin rod, the pin rod is used for being detachably connected with a duct piece in the duct piece system, the pin rod is arranged on the support piece, and the back pressure oil cylinder is connected with the support piece to drive the support piece to move up and down;

the back pressure mechanisms are circumferentially distributed at intervals around the rotation axis of the excavating device.

10. A variable diameter shaft boring machine according to any one of claims 1 to 3,

The variable-diameter shaft tunneling equipment comprises a slag discharging system, wherein the slag discharging system comprises a lifting device and a hydraulic grab bucket, and the lifting device is connected with the hydraulic grab bucket to drive the hydraulic grab bucket to move up and down in a shaft.