CN216515811U - Slurry open caisson heading machine - Google Patents

Abstract

The utility model relates to a slurry sinking well tunneling machine which comprises a rotary driving device, an excavating device and a swing arm device, wherein the rotary driving device comprises a driving box and a rotary box, and the bottom surface of the driving box is connected with the top surface of the rotary box through a first bearing. A first driving mechanism is fixed in the driving box in a sealing mode, and a first rotary sealing assembly is connected between the position, located on the outer side of the first bearing, of the bottom of the driving box and the outer side of the bottom of the rotary box. The excavation device comprises a supporting shell and a milling and excavating head, the milling and excavating head comprises a rotating head and a rotating shaft, the circumferential direction of the rotating head is fixed, and the rotating shaft is connected with the supporting shell through a second bearing. A second driving mechanism is hermetically fixed in the supporting shell, and a third rotary sealing assembly is arranged between the rotary head and the supporting shell. The swing arm device is used for driving the excavating device to swing along the radial direction of the rotary driving device. The slurry open caisson heading machine has wider stratum adaptability, does not need to stop water when being applied to a water-rich stratum, and can be directly constructed.

Description

Slurry open caisson heading machine

Technical Field

The utility model relates to the technical field of tunneling equipment, in particular to a slurry sinking well tunneling machine.

Background

Aiming at the construction of a shaft which is weak and broken and has abundant underground water, because of high underground water level, an underground main machine of the existing tunneling machine cannot be soaked in water, and water stopping methods such as a freezing method or advanced grouting are mostly adopted for construction, so that the construction operation is more complex.

Therefore, the inventor provides the slurry sinking well tunneling machine by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a slurry sinking well tunneling machine which is wider in stratum adaptability, does not need water stopping when being applied to a water-rich stratum and can be directly constructed.

The purpose of the utility model is realized in such a way that the mud sinking well heading machine comprises:

the rotary driving device comprises a driving box and a rotary box which are arranged up and down, and the bottom surface of the driving box is connected with the top surface of the rotary box through a first bearing; a first driving mechanism is hermetically fixed in the driving box, and the first driving mechanism is connected with the rotating box and can drive the rotating box to rotate; a first rotary sealing assembly is connected between the outer side position of the first bearing and the outer side of the bottom of the rotary box at the bottom of the driving box;

the excavation device comprises a support shell and a milling and digging head which are arranged up and down, wherein the upper end of the support shell is hinged with the rotary box, the milling and digging head comprises a rotary head and a rotary shaft which are fixed in the circumferential direction, and the rotary shaft is connected with the support shell through a second bearing; a second driving mechanism is hermetically fixed in the supporting shell, connected with the rotating shaft and capable of driving the rotating shaft to rotate, and a third rotary sealing assembly is arranged between the rotating head and the supporting shell;

and the upper end of the swing arm device is hinged with the rotary box, and the lower end of the swing arm device is hinged with the supporting shell and used for driving the excavation device to swing along the radial direction of the rotary driving device.

In a preferred embodiment of the present invention, the first rotary sealing assembly includes a first fixed mounting ring and a first rotary mounting ring, the first fixed mounting ring is fixedly connected to the bottom of the driving box in a sealing manner, and the first rotary mounting ring is fixedly connected to the bottom of the rotary box in a sealing manner; a first annular space is formed between the first fixed mounting ring and the first rotary mounting ring, a first labyrinth seal cavity is formed at the bottom of the first annular space, at least one first rotary seal ring is arranged in the first annular space, the first rotary seal ring is fixedly connected with the first fixed mounting ring or the first rotary mounting ring, and a first lubricating channel capable of being communicated with the first rotary seal ring is arranged in the side wall of the first fixed mounting ring.

In a preferred embodiment of the present invention, a plurality of first compression rings are arranged in the first annular space at intervals from top to bottom, the first compression rings are fixedly connected to the first fixed mounting ring or the first rotary mounting ring, and a first rotary sealing ring is clamped between two adjacent first compression rings; still seted up the first branch passageway of multichannel in the lateral wall of first fixed mounting ring, first branch passageway and first lubricated passageway intercommunication, the port of every first branch passageway can set up with the first clamping ring of the first rotary seal ring top that corresponds relatively.

In a preferred embodiment of the present invention, a first inner sealing ring is embedded in an inner wall of the first pressing ring located at the top, and a first outer sealing ring is sleeved in an outer wall of the first pressing ring.

In a preferred embodiment of the present invention, the first press ring is connected to the first fixed mounting ring or the first rotating mounting ring through a first fastener, an annular first slot is formed between each first press ring and the first fixed mounting ring or between each first press ring and the first rotating mounting ring, and a first protruding ring is formed on the first rotating sealing ring and can be clamped in the corresponding first slot.

In a preferred embodiment of the present invention, the first compression ring and the first rotary sealing ring are both fixedly connected to the first rotary mounting ring, and a detachable first raceway ring is hermetically mounted on the inner side of the first fixed mounting ring; a first annular space is formed between the first track ring and the first rotary mounting ring, and a first connecting channel is arranged at the port of the first track ring corresponding to each first branch channel; and a first lower labyrinth ring is arranged at the bottom of the first rotary mounting ring, and a first labyrinth seal cavity is formed between the bottom of the first runner ring and the first lower labyrinth ring.

In a preferred embodiment of the present invention, the first compression ring and the first rotary sealing ring are both fixedly connected to the first fixed mounting ring, a detachable first raceway ring is sealingly mounted on the outer periphery of the first rotary mounting ring, and a first annular space is formed between the first raceway ring and the first fixed mounting ring; a first lower labyrinth ring is arranged at the bottom of the first fixed mounting ring, and a first labyrinth seal cavity is formed between the bottom of the first raceway ring and the first lower labyrinth ring.

In a preferred embodiment of the present invention, the driving box and the revolving box are both ring-shaped structures, and a second rotary sealing assembly is connected between the top of the revolving box and the inner wall of the driving box at the position inside the first bearing.

In a preferred embodiment of the present invention, the second rotary sealing assembly includes a second fixed mounting ring and a second rotary mounting ring, the second fixed mounting ring is fixedly connected to the inner wall of the driving box in a sealing manner, and the second rotary mounting ring is fixedly connected to the top of the revolving box in a sealing manner; a second annular space is formed between the second fixed mounting ring and the second rotary mounting ring, a second labyrinth seal cavity is formed at the top of the second annular space, at least one second rotary sealing ring is arranged in the second annular space, the second rotary sealing ring is fixedly connected with the second fixed mounting ring or the second rotary mounting ring, and a second lubricating channel which can be communicated with the second rotary sealing ring is arranged in the inner wall of the second fixed mounting ring.

In a preferred embodiment of the present invention, a plurality of second compression rings are arranged in the second annular space at intervals from top to bottom, the second compression rings are fixedly connected to the second fixed mounting ring or the second rotary mounting ring, and a second rotary sealing ring is clamped between two adjacent second compression rings; and a plurality of second branch channels are further formed in the side wall of the second fixed mounting ring and communicated with the second lubricating channel, and the port of each second branch channel can be arranged opposite to the second pressure ring below the corresponding second rotary sealing ring.

In a preferred embodiment of the present invention, a second inner sealing ring is embedded in an inner wall of the second pressing ring located at the bottom, and a second outer sealing ring is sleeved in an outer wall of the second pressing ring.

In a preferred embodiment of the present invention, the second press ring is connected to the second fixed mounting ring or the second rotary mounting ring through a second fastening member, an annular second slot is formed between each second press ring and the second fixed mounting ring or between each second press ring and the second rotary mounting ring, and a second protruding ring is formed on the second rotary sealing ring and can be clamped in the corresponding second slot.

In a preferred embodiment of the present invention, the second compression ring and the second rotary sealing ring are both fixedly connected to the second rotary mounting ring, and a detachable second raceway ring is hermetically mounted on the inner side of the second fixed mounting ring; a second annular space is formed between the second track ring and the second rotary mounting ring, and a second connecting channel is arranged at the port of the second track ring corresponding to each second branch channel; and a second upper labyrinth ring is arranged at the top of the second rotary mounting ring, and a second labyrinth seal cavity is formed between the top of the second running ring and the second upper labyrinth ring.

In a preferred embodiment of the present invention, the second compression ring and the second rotary sealing ring are both fixedly connected to the second fixed mounting ring, a detachable second raceway ring is sealingly mounted on the outer periphery of the second rotary mounting ring, and a second annular space is formed between the second raceway ring and the second fixed mounting ring; and a second upper labyrinth ring is arranged at the top of the second fixed mounting ring, and a second labyrinth seal cavity is formed between the top of the second running ring and the second upper labyrinth ring.

In a preferred embodiment of the present invention, the third rotary seal assembly includes a third labyrinth seal chamber and a third rotary seal ring, an annular groove is formed between the rotary head and the support housing, and the third labyrinth seal chamber is formed at a notch of the annular groove; at least one third rotary sealing ring is arranged in the annular groove, the third rotary sealing ring is fixedly connected with the rotating head or the supporting shell, and a third lubricating channel which can be communicated with the third rotary sealing ring is arranged in the side wall of the supporting shell.

In a preferred embodiment of the present invention, a third upper labyrinth ring and a third lower labyrinth ring are disposed above and below the notch of the annular groove, the third upper labyrinth ring is fixedly connected to the support housing, the third lower labyrinth ring is fixedly connected to the rotary head, and a third labyrinth seal cavity is formed between the third upper labyrinth ring and the third lower labyrinth ring.

In a preferred embodiment of the utility model, a plurality of third pressure rings are arranged in the annular groove at intervals from top to bottom, the third pressure rings are fixedly connected with the rotating head or fixedly connected with the supporting shell, and a third rotary sealing ring is clamped between every two adjacent third pressure rings; a plurality of third branch channels are further formed in the side wall of the supporting shell and communicated with the third lubricating channel, and the port of each third branch channel can be arranged opposite to the third pressing ring below the corresponding third rotary sealing ring.

In a preferred embodiment of the present invention, a gap between the outer wall of the bottom of the support housing and the rotary head is located below the annular groove and is communicated with the annular groove, and a third sealing ring is clamped between the outer wall of the bottom of the support housing and the rotary head.

In a preferred embodiment of the present invention, the third compression rings are connected to the rotary head or the support housing through third fasteners, an annular third clamping groove is formed between each third compression ring and the rotary head or between each third compression ring and the support housing, and a third protruding ring is formed on each third rotary sealing ring and can be clamped in the corresponding third clamping groove.

In a preferred embodiment of the present invention, the third compression ring and the third rotary sealing ring are both fixedly connected to the rotary head, a detachable third raceway ring is sealingly installed on the periphery of the support housing, an annular groove is formed between the third raceway ring and the rotary head, and a third connecting channel is opened on the third raceway ring corresponding to each port of the third branch channel.

In a preferred embodiment of the present invention, the third compression ring and the third rotary sealing ring are both fixedly connected to the support housing, a detachable third raceway ring is sealingly mounted on the rotary head, and an annular groove is formed between the third raceway ring and the support housing.

In a preferred embodiment of the present invention, a groove is formed on the upper end surface of the rotating head, a rotating structural ring is fixedly and hermetically disposed in the groove, and an annular groove is formed between the rotating structural ring and the support housing.

In a preferred embodiment of the present invention, the supporting housing includes a cutting frame body and a cutting arm, which are sealed and fixed up and down, the cutting frame body is a cylindrical structure with closed up and down ends, and the cutting arm is a cylindrical structure with open two ends; the side wall of the cutting frame body is provided with a mounting opening, a detachable cover plate is hermetically mounted at the mounting opening, the second driving mechanism is fixedly arranged in the cutting frame body, and a driving shaft of the second driving mechanism can penetrate through the bottom of the cutting frame body and is connected with the rotating head; the rotating shaft is connected with the cutting arm through a second bearing, and an annular groove is formed between the cutting arm and the rotating head.

In a preferred embodiment of the utility model, the slurry open caisson heading machine further comprises a slag discharging device, wherein the slag discharging device comprises a slurry suction bent pipe, a slurry discharging pump, a slurry discharging pipe and a slurry-water separation device, which are sequentially connected from bottom to top, and the slurry-water separation device is placed on the ground; the slurry discharge pump is fixedly connected with the support shell, a slurry suction port of the slurry suction bent pipe is arranged right opposite to the side face of the milling and digging head, the shape of the slurry suction port can be matched with the shape of the side face of the milling and digging head, and the slurry discharge pipe penetrates through the rotary driving device and can be connected with the mud-water separation equipment.

In a preferred embodiment of the utility model, the slurry open caisson heading machine further comprises a supporting device, a propelling device, supporting legs and a rear matching device; the supporting device comprises a pipe piece, and an underground seat body is fixedly arranged on the inner wall of the pipe piece; the propelling device comprises a propelling driving piece and a sliding box, and the sliding box is arranged on the underground seat body; the first end of the supporting leg is fixedly connected with the driving box, the second end of the supporting leg is fixedly connected with the first end of the propelling driving piece, the second end of the propelling driving piece is fixedly connected with the sliding box, and the propelling driving piece is used for driving the underground main machine of the muddy water open caisson tunneling machine to move up and down; the back matching device comprises a duct piece lifting and pressing device, and the duct piece lifting and pressing device is connected with the duct piece and used for lifting and lowering the duct piece.

In a preferred embodiment of the present invention, the propulsion device further comprises an automatic locking mechanism, the slide box can slide up and down relative to the underground seat body, the automatic locking mechanism is arranged on the slide box, and the automatic locking mechanism can relatively fix the slide box and the underground seat body; the back matching device also comprises a recovery hoisting device which is used for lifting or lowering the underground main machine of the muddy water open caisson heading machine.

According to the muddy water open caisson heading machine, the first driving mechanism is hermetically arranged in the driving box, and the second driving mechanism is hermetically arranged in the supporting shell, so that external slurry can be prevented from entering and damaging the driving mechanisms; the annular area between the driving box and the rotary box and positioned outside the first bearing can be sealed through the first rotary sealing assembly, so that slurry is prevented from entering the first bearing, the first bearing is well protected, and the relative rotation between the rotary box and the driving box is not influenced; can seal the clearance between support housing and the rotating head through third rotary seal subassembly, prevent that mud from getting into the second bearing, play fine guard action to the second bearing, and do not influence the rotation of milling and digging the head. The whole tunneling machine can be applied to soil layers, broken rock layers, hard rocks and water-rich strata, and the stratum adaptability is wider; and because each actuating mechanism and each bearing all play better sealed protection effect, can directly soak and use in the aquatic, when using in the construction of weak broken, abundant groundwater shaft, need not stagnant water and can directly be under construction, do benefit to more and simplify construction operation, and save the cost.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

FIG. 1: the utility model provides a structural schematic diagram of the slurry open caisson heading machine.

FIG. 2: the structure of the rotary driving device provided by the utility model is schematically shown.

FIG. 3: the rotary drive apparatus provided for the present invention is shown in enlarged view one at the first rotary seal assembly.

FIG. 4: the rotary drive apparatus provided for the present invention is shown in enlarged view two at the first rotary seal assembly.

FIG. 5: the rotary drive apparatus provided for the present invention is shown enlarged at the second rotary seal assembly.

FIG. 6: the rotary drive apparatus provided for the present invention is shown enlarged at the second rotary seal assembly.

FIG. 7: the utility model provides an enlarged view of the underground main machine of the slurry open caisson heading machine.

FIG. 8: the utility model provides a schematic structural diagram of an excavation device.

FIG. 9: the excavation apparatus provided for the present invention is shown enlarged at the third rotary seal assembly.

FIG. 10: an enlarged view of the excavation apparatus provided for the present invention at the third rotary seal assembly is shown.

The reference numbers illustrate:

1. a rotation driving device;

11. a drive box; 111. a lower box body; 112. an upper protective cover; 12. a rotation box; 13. a first bearing; 14. a first drive mechanism; 15. a host machine rear matched device is arranged in the well;

16. a first rotary seal assembly; 161. a first stationary mounting ring; 1611. a first lubrication channel; 1612. a first branch channel; 162. a first rotating mounting ring; 163. a first rotary seal ring; 1631. a first convex ring; 164. a first pressure ring; 1641. a first inner seal ring; 1642. a first outer seal ring; 1643. a first snap ring; 165. a first track ring; 1651. a first connecting channel; 166. a first lower labyrinth ring;

17. a second rotary seal assembly; 171. a second stationary mounting ring; 1711. a second lubrication channel; 1712. a second branch channel; 172. a second rotating mounting ring; 173. a second rotary seal ring; 1731. a second convex ring; 174. a second pressure ring; 1741. a second inner seal ring; 1742. a second outer seal ring; 1743. a second snap ring; 175. a second track ring; 1751. a second connecting channel; 176. a second upper labyrinth ring;

2. excavating a device;

21. a support housing; 211. a cutting frame body; 2111. a cover plate; 212. a cutting arm; 2121. a third lubrication channel; 2122. a third branch channel; 2123. a connecting ring;

22. milling and digging a head; 221. rotating the head; 2211. a third seal ring; 222. a groove; 223. a rotating structural ring; 224. a mounting cavity;

23. a second drive mechanism; 24. a third upper labyrinth ring; 25. a third lower labyrinth ring; 26. a third rotary seal ring; 261. a third convex ring; 27. a third pressure ring; 271. a third snap ring; 28. a third track ring; 281. a third connecting channel;

3. a swing arm device;

4. a slag discharge device; 41. a pulp sucking bent pipe; 411. a pulp sucking port; 42. a slurry discharging pump; 43. a lower slurry discharge pipe; 44. a central swivel joint; 45. an upper slurry discharge pipe; 46. mud-water separation equipment;

5. a support leg;

6. a propulsion device; 61. propelling the driving member; 62. a slide box; 63. an automatic locking mechanism;

7. a support device; 71. a duct piece; 72. a downhole seat body;

8. a rear matching device; 81. a segment pressure raising device; 82. recovering the hoisting device; 83. a cable tray; 84. a hydraulic pump station; 85. and a master control room.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.

As shown in fig. 1 to 10, the present embodiment provides a slurry sinking tunneling machine, including:

the rotary driving device 1 comprises a driving box 11 and a rotary box 12 which are arranged up and down, wherein the bottom surface of the driving box 11 is connected with the top surface of the rotary box 12 through a first bearing 13; a first driving mechanism 14 is hermetically fixed in the driving box 11, and the first driving mechanism 14 is connected with the rotating box 12 and can drive the rotating box 12 to rotate; a first rotary sealing assembly 16 is connected between the outer side position of the first bearing 13 and the outer side of the bottom of the rotary box 12 at the bottom of the driving box 11;

the excavation device 2 comprises a support shell 21 and a milling and excavating head 22 which are arranged up and down, the upper end of the support shell 21 is hinged with the rotary box 12, the milling and excavating head 22 comprises a rotary head 221 and a rotary shaft which are fixed in the circumferential direction, and the rotary shaft is connected with the support shell 21 through a second bearing; a second driving mechanism 23 is hermetically fixed in the support housing 21, the second driving mechanism 23 is connected with the rotating shaft and can drive the rotating shaft to rotate, and a third rotary sealing assembly is arranged between the rotating head 221 and the support housing 21;

and the upper end of the swing arm device 3 is hinged with the rotary box 12, and the lower end of the swing arm device is hinged with the support shell 21 and used for driving the excavation device 2 to swing along the radial direction of the rotary driving device 1.

The structure of the rotating head 221 and the rotating shaft is an existing structure, and the two are connected by a spline to transmit torque. The swing arm device 3 can adopt an oil cylinder, for example, and the oil cylinder can stretch to drive the excavation device 2 to swing; the swing arm oil cylinder drives the excavation device 2 to swing to the outermost side from the center, and the whole excavation process mainly utilizes circumferential rotation to carry out full-section excavation.

Therefore, in the slurry open caisson boring machine of the embodiment, the first driving mechanism 14 is hermetically arranged in the driving box 11, and the second driving mechanism 23 is hermetically arranged in the supporting shell 21, so that the driving mechanisms can be prevented from being damaged by the entering of external slurry; the annular area between the driving box 11 and the rotary box 12 and positioned outside the first bearing 13 can be sealed through the first rotary sealing assembly 16, mud is prevented from entering the first bearing 13, the first bearing 13 is well protected, and relative rotation between the rotary box 12 and the driving box 11 is not influenced; the third rotary seal assembly can seal the gap between the support housing 21 and the rotary head 221, prevent mud from entering the second bearing, protect the second bearing well, and does not affect the rotation of the milling and digging head 22. The whole tunneling machine can be applied to soil layers, broken rock layers, hard rocks and water-rich strata, and the stratum adaptability is wider; and because each actuating mechanism and each bearing all play better sealed protection effect, can directly soak and use in the aquatic, when using in the construction of weak broken, abundant groundwater shaft, need not stagnant water and can directly be under construction, do benefit to more and simplify construction operation, and save the cost.

In a specific implementation, as shown in fig. 2 to 4, the first rotary seal assembly 16 includes a first fixed mounting ring 161 and a first rotary mounting ring 162, the first fixed mounting ring 161 is sealingly and fixedly connected with the bottom of the driving box 11, and the first rotary mounting ring 162 is sealingly and fixedly connected with the bottom of the revolving box 12. A first annular space is formed between the first fixed mounting ring 161 and the first rotary mounting ring 162, a first labyrinth seal cavity is formed at the bottom of the first annular space, at least one first rotary seal ring 163 is arranged in the first annular space, the first rotary seal ring 163 is fixedly connected with the first fixed mounting ring 161 or fixedly connected with the first rotary mounting ring 162, and a first lubrication channel 1611 capable of communicating with the first rotary seal ring 163 is arranged in the side wall of the first fixed mounting ring 161.

The first labyrinth seal cavity can play a first stage of sealing function and can prevent most of mud from entering the first annular space; through at least one first rotary sealing ring 163 in the first annular space, and utilize first lubrication channel 1611 to continue to pour into lubricating medium, can play the second grade sealed effect, and sealed bearing capacity is strong, and is sealed reliable, further prevents mud to get into the annular region in the first bearing 13 outside, plays fine guard action to first bearing 13.

Further, in order to improve the sealing effect, as shown in fig. 3 and 4, a plurality of first press rings 164 are disposed in the first annular space from top to bottom at intervals, the first press rings 164 are fixedly connected to the first fixed mounting ring 161 or fixedly connected to the first rotary mounting ring 162, and a first rotary sealing ring 163 is interposed between two adjacent first press rings 164. A plurality of first branch channels 1612 are further formed in the side wall of the first fixed mounting ring 161, the first branch channels 1612 are communicated with the first lubricating channel 1611, and a port of each first branch channel 1612 can be arranged opposite to the first pressing ring 164 above the corresponding first rotary sealing ring 163.

Generally, for convenience of machining, the first lubricating channel 1611 includes a plurality of first vertical channels arranged at intervals in the circumferential direction, each first branch channel 1612 includes a plurality of first horizontal channels arranged at intervals in the circumferential direction and at the outer periphery and a first ring groove channel arranged at the inner periphery, the first ring groove channel is opened on the inner wall surface of the first fixed mounting ring 161, and two ends of each first horizontal channel are respectively communicated with the corresponding first vertical channel and the first ring groove channel. In use, each first vertical channel of the first lubrication channel 1611 is connected to an oil pump via a corresponding line to continuously pump a lubrication medium, such as oil, grease, etc., into the first lubrication channel 1611 to lubricate each rotary seal.

The number of the first branch channels 1612 is the same as that of the first rotary seal rings 163, and generally, the first rotary seal ring 163 closest to the slurry inlet (i.e., the first rotary seal ring 163 at the bottom) is referred to as a first rotary seal ring at the head, the first rotary seal ring 163 farthest from the slurry inlet (i.e., the first rotary seal ring 163 at the top) is referred to as a second rotary seal ring at the tail, and the remaining first rotary seal rings 163 between the first branch channels 1612 and the second rotary seal rings are referred to as second rotary seal rings at the middle; the side facing the slurry inlet (i.e., the lower surface of the first rotary seal ring 163) is referred to as the front side of the first rotary seal ring 163, and the opposite side (i.e., the upper surface of the first rotary seal ring 163) is referred to as the back side thereof.

For example, as shown in fig. 3 and 4, four first compression rings 164, three first rotary sealing rings 163, and three first branch passages 1612 are provided in the present embodiment. For example, the three first rotary seal rings 163 are respectively referred to as a first rotary seal ring, a middle first rotary seal ring and a last first rotary seal ring from bottom to top, and the three first branch passages 1612 are respectively referred to as a first branch passage, a middle first branch passage and a last first branch passage from bottom to top. The first branch channel is communicated with the part of the first annular space between the first rotary sealing ring and the middle first rotary sealing ring, the middle first branch channel is communicated with the part of the first annular space between the middle first rotary sealing ring and the last first rotary sealing ring, and the last first branch channel is communicated with the part of the first annular space above the last first rotary sealing ring.

During operation, the first oil pump injects the lubricating medium into the first lubricating channel 1611, the lubricating medium can continuously build pressure for the back surface of the first rotary sealing ring and continuously build pressure for the front surface of the first rotary sealing ring in the middle through the first branch channel, the front surface of the first rotary sealing ring can be contacted with the incoming slurry, the pressure of the back surface of the first rotary sealing ring is greater than the pressure of the external slurry, and the injected lubricating medium can be continuously extruded to the outside, so that slurry particles can be effectively prevented from entering. The lubricating medium can continuously build pressure for the back surface of the first rotary sealing ring of the middle channel and continuously build pressure for the front surface of the first rotary sealing ring of the last channel through the first branch channel of the middle channel, and the lubricating medium can continuously build pressure for the back surface of the first rotary sealing ring of the last channel through the first branch channel of the last channel, so that the pressure difference between the front surface and the back surface of the first rotary sealing ring of the middle channel and the pressure difference between the front surface and the back surface of the first rotary sealing ring of the last channel can be reduced, and the first rotary sealing ring can bear higher external pressure.

Therefore, by arranging the plurality of first rotary sealing rings 163, on one hand, when one of the first rotary sealing rings 163 fails, the rest of the first rotary sealing rings 163 can prevent slurry from entering, so that the sealing effect is ensured, and the sealing is more reliable. On the other hand, the lubricating medium is injected through each first branch channel 1612, so that not only can each rotary seal be lubricated, but also the pressure can be built on the back of the first rotary seal ring, the pressure on the back of the first rotary seal ring is ensured to be larger than the pressure of external slurry, the lubricating medium can be continuously extruded outwards at the position of the first rotary seal ring, and slurry particles are effectively prevented from entering; meanwhile, pressure can be built on the front surface and the back surface of each of the rest first rotary sealing rings 163, so that the pressure difference on the two surfaces of each of the rest first rotary sealing rings 163 is reduced, the whole sealing and bearing capacity is stronger, the sealing effect is better, and the protection effect on the first bearing 13 is better.

Specifically, the number of the first rotary sealing rings 163 may be determined according to the external sealing pressure, and 1 to n sealing rings may be provided, and the pressure injected when the oil pump pumps the lubricating medium is sequentially reduced until the pressure difference between the two sides of the last sealing ring meets the pressure-bearing requirement of the sealing.

Preferably, as shown in fig. 4, a first inner sealing ring 1641 is embedded in the inner wall of the first pressing ring 164 at the top, and a first outer sealing ring 1642 is sleeved in the outer wall of the first pressing ring. Specifically, an inner sealing ring groove and an outer sealing ring groove are respectively formed in the inner wall and the outer wall of the first pressure ring 164, and a first inner sealing ring 1641 and a first outer sealing ring 1642 are respectively formed in the inner sealing ring groove and the outer sealing ring groove. The first rotary sealing ring of end can play the effect of pressurize, more help guaranteeing that the pressure differential that the two sides of the first rotary sealing ring of end received is balanced basically, can further improve sealed bearing capacity, and it is sealed more reliable.

Generally, for convenience of installation and fixation, the first press ring 164 is connected to the first fixed mounting ring 161 or the first rotary mounting ring 162 through a first fastener, an annular first clamping groove is formed between each first press ring 164 and the first fixed mounting ring 161 or between each first press ring 164 and the first rotary mounting ring 162, a first protruding ring 1631 is formed on the first rotary sealing ring 163, and the first protruding ring 1631 can be clamped in the corresponding first clamping groove.

The first pressure rings 164 mainly function to fix the first rotary seal rings 163 to the first fixed mount ring 161 or the first rotary mount ring 162, and the first pressure rings 164 and the first rotary seal rings 163 are fixed to the first fixed mount ring 161 or the first rotary mount ring 162. The position of the first clamping groove is to match with the position of the first protruding ring 1631, for example, in this embodiment, the first pressing ring 164 and the first rotary sealing ring 163 are both fixed to the first rotary mounting ring 162, the first protruding ring 1631 is formed on the inner periphery of the upper surface of each first rotary sealing ring 163, the first clamping ring 1643 is formed on the outer periphery of the lower surface of the first pressing ring 164 above the first rotary sealing ring 163, and the first clamping groove is formed between the first clamping ring 1643 and the first rotary mounting ring 162, so that the first rotary sealing ring 163 is pressed and fixed to the first rotary mounting ring 162 conveniently and is simple and convenient. Of course, the first rotary seal ring 163 may be fixed in other manners, and this embodiment is merely an example.

In practical application, for convenience of processing and installation, when the first compression ring 164 and the first rotary sealing ring 163 are both fixedly connected with the first rotary installation ring 162, the detachable first raceway ring 165 is hermetically installed on the inner side of the first fixed installation ring 161. A first annular space is formed between the first raceway ring 165 and the first rotary mounting ring 162, and a first connecting channel 1651 is formed at the port of the first raceway ring 165 corresponding to each first branch channel 1612. A first lower labyrinth ring 166 is mounted at the bottom of the first rotary mounting ring 162, and a first labyrinth seal chamber is formed between the bottom of the first raceway ring 165 and the first lower labyrinth ring 166. Generally, for ease of manufacture, each first connecting passage 1651 includes a plurality of circumferentially spaced first through-holes that communicate with the first annular groove passage. When the first compression ring 164 and the first rotary sealing ring 163 are fixedly connected with the first fixed mounting ring 161, a detachable first raceway ring 165 is hermetically mounted on the outer periphery of the first rotary mounting ring 162, and a first annular space is formed between the first raceway ring 165 and the first fixed mounting ring 161. A first lower labyrinth ring 166 is installed at the bottom of the first stationary installation ring 161, and a first labyrinth seal chamber is formed between the bottom of the first raceway ring 165 and the first lower labyrinth ring 166. If the first track ring 165 is worn, it can be replaced in time, and the replacement is more convenient.

In one embodiment, the top and bottom surfaces of the driving box 11 and the revolving box 12 are closed, i.e. there is no central passage, and the whole revolving driving device 1 can be sealed and protected by only installing the first rotary sealing assembly 16.

In another embodiment, the driving box 11 and the rotation box 12 are both annular structures, and a second rotary sealing assembly 17 is connected between the top of the rotation box 12 and the inner wall of the driving box 11 at a position inside the first bearing 13.

Generally, for the convenience of processing, the driving box 11 includes an upper protection cover 112 and a lower box 111 which are connected up and down, both of which are annular closed structures, and a static seal is arranged between the two. The first driving mechanism 14 is fixedly arranged in the lower box body 111, penetrates through the lower box body 111 and is connected with the rotary box 12, the upper part of the first driving mechanism is positioned in the upper protective cover 112, and the upper protective cover 112 and the lower box body 111 jointly carry out sealing protection on the first driving mechanism 14. The top of the lower box 111 is also provided with downhole main machine rear corollary equipment 15 such as an electrical cabinet, a valve block and the like, and the downhole main machine rear corollary equipment is sealed and protected by an upper protective cover 112. The first rotary seal assembly 16 and the second rotary seal assembly 17 are installed between the lower case 111 and the swing case 12.

In this case, the driving box 11 and the rotation box 12 both have a central channel therebetween, and it is necessary to effectively seal the areas where the outer side and the inner side of the first bearing 13 are located by using the cooperation of the first rotary seal assembly 16 located at the outer side of the first bearing 13 and the second rotary seal assembly 17 located at the inner side of the first bearing 13, so as to prevent mud from entering the first bearing 13, thereby achieving a better sealing protection effect. Meanwhile, the whole rotary driving device 1 is driven by the periphery, the first driving mechanism 14 and the underground main engine rear matching equipment 15 are positioned on the periphery, a channel is reserved in the middle, and the grab bucket can be used for conveniently discharging slag from the middle in both the non-water geology and the water geology; when the water geology meets special conditions such as pebbles, the grab bucket can be used for processing from the middle channel, and construction is facilitated.

Specifically, as shown in fig. 2, 5 and 6, the second rotary seal assembly 17 includes a second fixed mounting ring 171 and a second rotary mounting ring 172, the second fixed mounting ring 171 is sealingly fixed to the inner wall of the driving box 11, and the second rotary mounting ring 172 is sealingly fixed to the top of the revolving box 12. A second annular space is formed between the second fixed mounting ring 171 and the second rotary mounting ring 172, a second labyrinth seal cavity is formed at the top of the second annular space, at least one second rotary seal ring 173 is arranged in the second annular space, the second rotary seal ring 173 is fixedly connected with the second fixed mounting ring 171 or the second rotary mounting ring 172, and a second lubrication passage 1711 capable of communicating with the second rotary seal ring 173 is formed in the inner wall of the second fixed mounting ring 171.

The second labyrinth seal cavity can play a role of first-stage sealing, and most of mud can be prevented from entering a second annular space; through at least one second rotary sealing ring 173 in the second annular space, and utilize second lubrication passage 1711 to continue to pour into lubricating medium into, can play the second level sealed effect, and sealed bearing capacity is strong, and is sealed reliable, further prevents mud entering the inboard annular region of first bearing 13, plays fine guard action to first bearing 13.

Further, in order to improve the sealing effect, as shown in fig. 5 and fig. 6, a plurality of second pressing rings 174 are disposed in the second annular space from top to bottom at intervals, the second pressing rings 174 are fixedly connected to the second fixed mounting ring 171 or fixedly connected to the second rotary mounting ring 172, and a second rotary sealing ring 173 is interposed between each two adjacent second pressing rings 174. A plurality of second branch channels 1712 are further formed in the side wall of the second fixed mounting ring 171, the second branch channels 1712 are communicated with the second lubricating channel 1711, and a port of each second branch channel 1712 can be arranged opposite to the second press ring 174 below the corresponding second rotary sealing ring 173.

Generally, for convenience of machining, the second lubricating passage 1711 includes a plurality of second vertical passages arranged at intervals in the circumferential direction, each second branch passage 1712 includes a plurality of second horizontal passages located at the outer periphery and arranged at intervals in the circumferential direction and a second annular groove passage located at the inner periphery, the second annular groove passage is opened on the inner wall surface of the second fixed mounting ring 171, and both ends of each second horizontal passage are respectively communicated with the corresponding second vertical passage and the second annular groove passage. During use, each second vertical channel of the second lubricating channel 1711 is connected with the oil pump through a corresponding pipeline so as to continuously pump lubricating media into the second lubricating channel 1711 and lubricate each rotary seal.

The number of the second branch passages 1712 is the same as the number of the second rotary seal ring 173, and for example, as shown in fig. 5 and 6, four second press rings 174, three second rotary seal rings 173, and three second branch passages 1712 are provided in total in this embodiment. The second rotary seal ring 173 closest to the mud intake (i.e., the top second rotary seal ring 173) is generally referred to as the first rotary seal ring, the second rotary seal ring 173 furthest from the mud intake (i.e., the bottom second rotary seal ring 173) is referred to as the last second rotary seal ring, and the remaining second rotary seal rings 173 therebetween are each referred to as the middle second rotary seal ring; the side facing the slurry inlet (i.e., the upper surface of the second rotary seal ring 173) is referred to as the front side of the second rotary seal ring 173, and the opposite side (i.e., the lower surface of the second rotary seal ring 173) is referred to as the back side thereof. Similar to the sealing principle of the first rotary seal assembly 16, will not be described in detail herein.

Through setting up multichannel second rotary sealing ring 173, on the one hand, can be when one of them second rotary sealing ring 173 became invalid, other way second rotary sealing ring 173 also can prevent the mud entering, guarantees sealed effect, and sealed more reliable. On the other hand, lubricating media are injected through the second branch channels 1712, so that not only can each rotary seal be lubricated, but also pressure can be built on the back of the first second rotary seal ring, the pressure on the back of the first second rotary seal ring is ensured to be larger than the pressure of external slurry, the lubricating media can be continuously extruded outwards at the position of the first second rotary seal ring, and slurry particles are effectively prevented from entering; meanwhile, pressure can be built on the front surface and the back surface of each of the other second rotary sealing rings 173, so that the pressure difference on the two surfaces of each of the other second rotary sealing rings 173 is reduced, the whole sealing and bearing capacity is stronger, the sealing effect is better, and the protection effect on the first bearing 13 is better. The number of the second rotary seal rings 173 may be set to 1 to n according to the external sealing pressure.

Preferably, as shown in fig. 6, a second inner sealing ring 1741 is embedded in the inner wall of the second pressing ring 174 at the bottom, and a second outer sealing ring 1742 is sleeved in the outer wall of the second pressing ring. The pressure maintaining function can be achieved for the last second rotary sealing ring, the basic balance of the pressure difference on two surfaces of the last second rotary sealing ring can be guaranteed, the sealing pressure bearing capacity can be further improved, and the sealing is more reliable.

Generally, for convenience of installation and fixation, the second press ring 174 is connected to the second fixed mounting ring 171 or the second rotary mounting ring 172 through a second fastener, an annular second slot is formed between each second press ring 174 and the second fixed mounting ring 171 or between each second press ring 174 and the second rotary mounting ring 172, a second protruding ring 1731 is formed on the second rotary sealing ring 173, and the second protruding ring 1731 can be clamped in the corresponding second slot.

The second pressure rings 174 mainly fix the second rotary seal rings 173 to the second fixed mount ring 171 or the second rotary mount ring 172, and the second pressure rings 174 and the second rotary seal rings 173 are fixed to the second fixed mount ring 171 or the second rotary mount ring 172. The position of the second locking groove is matched with the position of the second protruding ring 1731, for example, in this embodiment, the second pressing ring 174 and the second rotary sealing ring 173 are both fixed to the second rotary mounting ring 172, the inner periphery of the lower surface of each second rotary sealing ring 173 is downward formed with the second protruding ring 1731, the outer periphery of the upper surface of the second pressing ring 174 below the second rotary sealing ring 173 is formed with the second locking ring 1743, and the second locking groove is formed between the second locking ring 1743 and the second rotary mounting ring 172, so that the second rotary sealing ring 173 is pressed and fixed to the second rotary mounting ring 172 conveniently, and the operation is simple and convenient. Of course, the second rotary seal ring 173 may be fixed in other manners, and this embodiment is merely an example.

In practical applications, for convenience of processing and installation, when the second pressing ring 174 and the second rotary sealing ring 173 are both fixedly connected to the second rotary mounting ring 172, the detachable second raceway ring 175 is hermetically installed on the inner side of the second fixed mounting ring 171. A second annular space is formed between the second track ring 175 and the second rotary mounting ring 172, and a second connecting channel 1751 is formed at the port of the second track ring 175 corresponding to each second branch channel 1712. A second upper labyrinth ring 176 is mounted on the top of the second rotary mounting ring 172, and a second labyrinth seal chamber is formed between the top of the second running ring 175 and the second upper labyrinth ring 176. Generally, for ease of manufacture, each second connector passage 1751 includes a plurality of circumferentially spaced second through-holes that communicate with the second annular channel described above. When the second pressing ring 174 and the second rotary sealing ring 173 are both fixedly connected with the second fixed mounting ring 171, a detachable second raceway ring 175 is hermetically mounted on the outer periphery of the second rotary mounting ring 172, and a second annular space is formed between the second raceway ring 175 and the second fixed mounting ring 171. A second upper labyrinth ring 176 is installed on the top of the second fixed installation ring 171, and a second labyrinth seal chamber is formed between the top of the second running ring 175 and the second upper labyrinth ring 176. If the second raceway ring 175 is worn, it can be replaced in time and more conveniently.

Further, as shown in fig. 8 to 10, the third rotary seal assembly includes a third labyrinth seal chamber and a third rotary seal ring 26, an annular groove is formed between the rotary head 221 and the support housing 21, and the third labyrinth seal chamber is formed at a notch of the annular groove. At least one third rotary sealing ring 26 is arranged in the annular groove, the third rotary sealing ring 26 is fixedly connected with the rotary head 221 or fixedly connected with the support shell 21, and a third lubricating channel 2121 capable of being communicated with the third rotary sealing ring 26 is arranged in the side wall of the support shell 21.

The third labyrinth seal cavity can play a role in first-stage sealing and can prevent most of mud from entering the annular groove; through at least one third rotary sealing ring 26 in the annular groove, and utilize the third lubrication passage 2121 to come the continuous injection lubricating medium, can play the second level sealed effect, and sealed bearing capacity is strong, and is sealed reliable, further prevents that mud from getting into the inside of milling and digging head 22, plays fine guard action to the second bearing.

Generally, a third upper labyrinth ring 24 and a third lower labyrinth ring 25 which are arranged up and down are arranged outside the notch of the annular groove, the third upper labyrinth ring 24 is fixedly connected with the support shell 21, the third lower labyrinth ring 25 is fixedly connected with the rotary head 221, and a third labyrinth sealing cavity is formed between the third upper labyrinth ring 24 and the third lower labyrinth ring 25.

Further, in order to improve the sealing effect, as shown in fig. 9 and 10, a plurality of third pressure rings 27 are disposed in the annular groove at intervals from top to bottom, the third pressure rings 27 are fixedly connected to the rotary head 221 or fixedly connected to the support housing 21, and a third rotary sealing ring 26 is interposed between each two adjacent third pressure rings 27. A plurality of third branch channels 2122 are further formed in the side wall of the support housing 21, the third branch channels 2122 are communicated with the third lubrication channel 2121, and a port of each third branch channel 2122 can be arranged opposite to the third pressure ring 27 below the corresponding third rotary sealing ring 26.

Generally, for ease of manufacture, the third lubrication passage 2121 includes a plurality of third vertical passages circumferentially spaced apart from one another, and each of the third branch passages 2122 includes a plurality of third horizontal passages circumferentially spaced apart from one another and penetrating the outer wall surface of the support housing 21, each of the third horizontal passages communicating with a corresponding one of the third vertical passages. When in use, each third vertical channel of the third lubrication channel 2121 is connected to the oil pump through a corresponding pipeline, so as to continuously pump the lubrication medium into the third lubrication channel 2121 to lubricate each rotary seal.

The number of the third branch passages 2122 is the same as the number of the third rotary seal ring 26, and for example, as shown in fig. 9 and 10 in the present embodiment, four third pressure rings 27, three third rotary seal rings 26, and three third branch passages 2122 are provided. The third rotary seal ring 26 closest to the slurry inlet (i.e., the top third rotary seal ring 26) is generally referred to as the first-pass third rotary seal ring, the third rotary seal ring 26 farthest from the slurry inlet (i.e., the bottom third rotary seal ring 26) is referred to as the last-pass third rotary seal ring, and the remaining third rotary seal rings 26 between the first rotary seal ring and the last-pass third rotary seal ring are referred to as middle-pass third rotary seal rings; the side facing the slurry inlet (i.e. the upper surface of the third rotary seal ring 26) is referred to as the front side of the third rotary seal ring 26 and the opposite side (i.e. the lower surface of the third rotary seal ring 26) is referred to as the back side thereof. Similar to the sealing principle of the first rotary seal assembly 16, will not be described in detail herein.

Through setting up multichannel third rotary seal ring 26, on the one hand, can be when one of them third rotary seal ring 26 became invalid, all the other third rotary seal ring 26 of saying can prevent equally that mud from getting into, guarantee sealed effect, it is sealed more reliable. On the other hand, the lubricating medium is injected through each third branch passage 2122, so that not only can each rotary seal be lubricated, but also the pressure can be built on the back of the first third rotary seal ring, the pressure on the back is ensured to be greater than the pressure of external slurry, the lubricating medium can be continuously extruded outwards at the position of the first third rotary seal ring, and slurry particles are effectively prevented from entering; meanwhile, pressure can be built on the front face and the back face of each of the rest third rotary sealing rings 26, so that the pressure difference on the two faces of each of the rest third rotary sealing rings 26 is reduced, the whole sealing and bearing capacity is stronger, the sealing effect is better, and the protection effect on the second bearing is better. The number of the third rotary sealing ring 26 can be determined according to the external sealing pressure, and 1-n channels can be provided.

Preferably, as shown in fig. 9, a gap between the outer wall of the bottom of the support housing 21 and the rotary head 221 is located below the annular groove and communicates with the annular groove, and a third sealing ring 2211 (here, a rotary seal) is interposed between the outer wall of the bottom of the support housing 21 and the rotary head 221.

Specifically, a connecting ring 2123 is further fixedly connected to the bottom of the cutting arm 212, a sealing groove is formed in the inner wall of the rotating head 221 located at the periphery of the connecting ring 2123, and a third sealing ring 2211 is embedded in the sealing groove, so that a pressure maintaining effect on the last third rotating sealing ring can be achieved, the basic balance of the pressure difference received by two surfaces of the last third rotating sealing ring can be ensured, the sealing pressure-bearing capacity can be further improved, and the sealing is more reliable.

Generally, for convenience of installation and fixation, the third pressure rings 27 are connected to the rotary head 221 or the support housing 21 through third fasteners, an annular third clamping groove is formed between each third pressure ring 27 and the rotary head 221 or the support housing 21, a third protruding ring 261 is formed on the third rotary sealing ring 26, and the third protruding ring 261 can be clamped in the corresponding third clamping groove.

Each of the third pressure rings 27 described above mainly functions to fix each of the third rotary seal rings 26 to the rotary head 221 or the support case 21, and each of the third pressure rings 27 and the third rotary seal rings 26 is fixed to the rotary head 221 or to the support case 21. The position of the third slot is to match with the position of the third protruding ring 261, for example, in this embodiment, the third pressing ring 27 and the third rotary sealing ring 26 are both fixed to the rotary head 221, the outer periphery of the upper surface of each third rotary sealing ring 26 is formed with the third protruding ring 261 upward, the inner periphery of the lower surface of the third pressing ring 27 above the third rotary sealing ring 26 is formed with the third snap ring 271 downward, and the third slot is formed between the third snap ring 271 and the rotary head 221, so as to conveniently press and fix the third rotary sealing ring 26 to the rotary head 221, which is simple and convenient. Of course, the third rotary seal ring 26 may be fixed in other ways, and this embodiment is merely an example.

In practical application, when the third pressure ring 27 and the third rotary sealing ring 26 are both fixedly connected to the rotary head 221, the third removable raceway ring 28 is sealingly installed on the outer periphery of the support housing 21, an annular groove is formed between the third raceway ring 28 and the rotary head 221, and a third connecting channel 281 is formed on the third raceway ring 28 corresponding to each port of the third branch channel 2122. Generally, for convenience of manufacture, each third connecting passage 281 includes a ring-shaped passage at the inner periphery and a plurality of third through holes at the outer periphery, and the ring-shaped passage is communicated with each third through hole and each third horizontal passage of the third branch passage 2122. When the third compression ring 27 and the third rotary sealing ring 26 are both fixedly connected with the support housing 21, the third removable raceway ring 28 is hermetically mounted on the rotary head 221, and an annular groove is formed between the third raceway ring 28 and the support housing 21. If the third track ring 28 is worn, it can be replaced in time and more conveniently.

Further, for convenience of processing and installation, as shown in fig. 9, a groove 222 is formed on the upper end surface of the spin head 221, a rotating structural ring 223 is sealingly and fixedly disposed in the groove 222, and an annular groove is formed between the rotating structural ring 223 and the support housing 21.

It will be appreciated that the third upper labyrinth ring 24 is connected to the cutting arm 212 by fasteners and the third lower labyrinth ring 25 is secured to the rotating structural ring 223 by fasteners. The bottom of the cutting arm 212 is inserted into the groove 222 and forms an annular groove with the rotating structural ring 223, the third rotating sealing ring 26, the third pressure ring 27 or the third runway ring 28 can be installed on the rotating structural ring 223, an installation cavity 224 is opened in the rotating head 221 and below the groove 222, the connecting ring 2123 extends into the installation cavity 224, and a third sealing ring 2211 is embedded in the cavity side wall of the installation cavity 224.

Further, for more convenient processing and installation, as shown in fig. 8, the supporting housing 21 includes a cutting frame body 211 and a cutting arm 212 which are sealed and fixed up and down, the cutting frame body 211 is a cylindrical structure with both ends closed up and down, and the cutting arm 212 is a cylindrical structure with both ends open. The side wall of the cutting frame body 211 is provided with a mounting opening, a detachable cover plate 2111 is hermetically mounted at the mounting opening, the second driving mechanism 23 is fixedly arranged in the cutting frame body 211, and a driving shaft of the second driving mechanism 23 can penetrate through the bottom of the cutting frame body 211 and is connected with the rotating head 221. The rotating shaft is connected with the cutting arm 212 through a second bearing, and an annular groove is formed between the cutting arm 212 and the rotating head 221. In addition, the two cylindrical structures of the cutting frame body 211 and the cutting arm 212 may be cylindrical structures, square cylindrical structures, or other cross-sectional shapes.

Generally, the cover plate 2111 is connected to the cutter block body 211 by a fastener (e.g., a bolt), and a sealing ring is interposed between the cover plate 2111 and the cutter block body 211 to prevent external mud from entering the inside of the cutter block body 211.

Further, as shown in fig. 1 and 7, the mud-water open caisson boring machine further comprises a slag tapping device 4, wherein the slag tapping device 4 comprises a slurry suction elbow 41, a slurry discharge pump 42 and a slurry discharge pipe which are sequentially connected from bottom to top, and a mud-water separation device 46 which is used for being placed on the ground. The slurry discharge pump 42 is fixedly connected with the support shell 21, a slurry suction port 411 of the slurry suction bent pipe 41 is arranged right opposite to the side surface of the milling and digging head 22, the shape of the slurry suction port 411 can be matched with the shape of the side surface of the milling and digging head 22, and the slurry discharge pipe penetrates through the rotary driving device 1 and can be connected with the mud-water separation equipment 46.

It can be understood that when the driving box 11 and the revolving box 12 are both of an annular structure, a central revolving joint 44 is further fixedly arranged at the center of the driving box 11, the slurry discharge pipe comprises an upper slurry discharge pipe 45 and a lower slurry discharge pipe 43, two ends of the lower slurry discharge pipe 43 are respectively connected with the slurry discharge pump 42 and the central revolving joint 44, and two ends of the upper slurry discharge pipe 45 are respectively connected with the central revolving joint 44 and the mud-water separation device 46. The slurry discharge pump 42 adopts a slurry discharge pump 42 with a seal so as to be applied to the water-rich stratum; the slurry suction port 411 is closely attached to the side surface of the milling and excavating head 22, so that excavated dregs can enter the slurry suction bent pipe 41 in time, and the slag discharging efficiency is high; the slurry discharge pump 42 closely follows the excavation device 2, slurry carrying dregs can be pumped into the slurry-water separation equipment 46 through the lower slurry discharge pipe 43, the central rotary joint 44 and the upper slurry discharge pipe 45 for separation, the separated slurry can be circularly fed into a well for use, and the separated dregs are transported out of the field.

Further, as shown in fig. 1 and 7, the slurry open-caisson heading machine further comprises a supporting device 7, a propelling device 6, supporting legs 5 and a rear matching device 8. The support device 7 comprises a pipe piece 71, and a downhole seat body 72 is fixedly arranged on the inner wall of the pipe piece 71. The propulsion device 6 comprises a propulsion drive 61 and a slide box 62, the slide box 62 being arranged on a downhole seat 72. The first end of the supporting leg 5 is fixedly connected with the driving box 11, the second end of the supporting leg 5 is fixedly connected with the first end of the propelling driving piece 61, the second end of the propelling driving piece 61 is fixedly connected with the sliding box 62, and the propelling driving piece 61 is used for driving the underground main machine of the slurry open caisson heading machine to move up and down. The back matching device 8 comprises a segment lifting and pressing device 81, and the segment lifting and pressing device 81 is connected with the segment 71 and used for lifting and lowering the segment 71.

The supporting device 7 comprises but is not limited to precast concrete segments, cast-in-place concrete segments, steel pipe segments and the like, and can realize excavation and supporting at the same time and prevent the well wall from collapsing. The propulsion driving element 61 can be, for example, a propulsion oil cylinder, the axial direction of the supporting leg 5 is arranged along the horizontal direction, the supporting leg 5 is specifically fixedly connected with the cylinder barrel of the propulsion oil cylinder, and the piston rod of the propulsion oil cylinder is fixedly connected with the sliding box 62; through the action of a piston rod of the propulsion oil cylinder, the rotary driving device 1 can be driven to move up and down, and then the slurry suction bent pipe 41, the slurry discharge pump 42 and the lower slurry discharge pipe 43 in the excavation device 2, the swing arm device 3 and the slag discharging device 4 are driven to move up and down together.

In one embodiment, slide box 62 is removably and fixedly coupled to downhole housing 72 with fasteners. When the underground main engine needs to be overhauled, the fixing between the underground main engine and the underground main engine is released. In another preferred embodiment, the propulsion device 6 further comprises an automatic locking mechanism 63, the slide box 62 can slide up and down relative to the downhole seat 72 (i.e. the slide box 62 is slidably connected with the downhole seat 72), the automatic locking mechanism 63 is disposed on the slide box 62, and the automatic locking mechanism 63 can fix the slide box 62 and the downhole seat 72 relatively. The rear matching device 8 also comprises a recovery hoisting device 82 which is used for lifting or lowering the underground main machine of the muddy water open caisson heading machine.

The underground main machine of the slurry open caisson heading machine comprises the rotary driving device 1, an excavation device 2, a swing arm device 3, a slurry suction bent pipe 41, a slurry discharge pump 42 and a lower slurry discharge pipe 43 in a slag discharging device 4, supporting legs 5 and a propelling device 6; the recovery winch 82 may be connected to any structure in the downhole main unit, for example, the recovery winch 82 is fixedly connected to the support legs 5 in this embodiment, so as to raise or lower the downhole main unit.

After the downhole main machine is installed in place, the automatic locking mechanism 63 can relatively fix the slide box 62 and the downhole seat body 72, so that the downhole main machine is locked. When the underground main engine needs to be lifted, the automatic locking mechanism 63 is opened, the sliding box 62 can slide up and down relative to the underground base body 72, and then the underground main engine can be lifted out of the ground by utilizing the recovery hoisting device 82, so that the overhauling operation is more convenient. The automatic locking mechanism 63 may be any structure that can be used, as long as it is convenient to lock and unlock the slide box 62 and the downhole seat 72, which is not limited in the present invention.

In conclusion, the muddy water open caisson heading machine in the embodiment has the following advantages:

(1) the front end of the equipment is provided with an excavation device 2, a slag discharging device 4 is close to the excavation device 2, and a slurry discharging pump 42 is used for pumping slurry carrying dregs to a mud-water separation station for separation; the inner ring of the first bearing 13 is fixedly connected with the driving box 11, and the outer ring of the first bearing 13 is fixedly connected with the rotary box 12; the inner ring of the first rotary seal assembly 16 is fixed on the rotary box 12, and the outer ring thereof is fixed on the driving box 11; the inner ring of the second rotary sealing component 17 is fixed on the rotary box 12, and the outer ring thereof is fixed on the driving box 11; the upper shield 112 is fixed to the lower casing 111 and seals the downhole main unit rear support 15 and the first drive mechanism 14. The inner ring of the third rotary seal assembly is fixed to support housing 21 and the outer ring is fixed to rotary head 221.

The first driving mechanism 14, the underground main engine rear supporting equipment 15 and the first bearing 13 in the whole rotary driving device 1 and the second driving mechanism 23 and the second bearing in the excavation device 2 are sealed by adopting corresponding sealing measures and can adapt to underwater slurry and high-pressure environments, so that the heading machine in the embodiment can be applied to soil layers, broken rock layers, hard rocks and water-rich strata, the geological adaptability is wide, and a dry-wet dual mode is realized; when the method is applied to construction of the weak and broken vertical shaft with abundant underground water, water stopping is not needed, direct construction can be realized, and the cost is saved.

(2) The rotary driving device 1 adopts peripheral driving, a channel is reserved in the middle, and when meeting special conditions such as pebbles and the like, a grab bucket can be arranged in the middle for processing;

(3) excavation, slag discharging and supporting are carried out synchronously, and the construction efficiency is high.

(4) The well forming precision is high, and ground settlement is effectively controlled by using the pressure balance of the slurry;

(5) remote control, full automatization operation, degree of mechanization is high, unmanned construction in the pit, and the security is high.

The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the utility model should fall within the protection scope of the utility model.

Claims (26)

1. A mud sinking well tunneling machine, comprising:

the rotary driving device comprises a driving box and a rotary box which are arranged up and down, and the bottom surface of the driving box is connected with the top surface of the rotary box through a first bearing; a first driving mechanism is hermetically fixed in the driving box, and the first driving mechanism is connected with the rotary box and can drive the rotary box to rotate; a first rotary sealing assembly is connected between the outer side position of the first bearing and the outer side of the bottom of the rotary box at the bottom of the driving box;

the excavation device comprises a support shell and a milling and excavating head which are arranged up and down, wherein the upper end of the support shell is hinged with the rotary box, the milling and excavating head comprises a rotary head and a rotary shaft which are fixed in the circumferential direction, and the rotary shaft is connected with the support shell through a second bearing; a second driving mechanism is hermetically fixed in the supporting shell, is connected with the rotating shaft and can drive the rotating shaft to rotate, and a third rotary sealing assembly is arranged between the rotating head and the supporting shell;

and the upper end of the swing arm device is hinged with the rotary box, and the lower end of the swing arm device is hinged with the supporting shell and used for driving the excavation device to swing along the radial direction of the rotary driving device.

2. The mud sinking machine of claim 1,

the first rotary sealing assembly comprises a first fixed mounting ring and a first rotary mounting ring, the first fixed mounting ring is fixedly connected with the bottom of the driving box in a sealing manner, and the first rotary mounting ring is fixedly connected with the bottom of the rotary box in a sealing manner; the first fixed mounting ring and the first rotary mounting ring are formed with a first annular space between them, the bottom of the first annular space is formed with a first labyrinth seal cavity, the first annular space is provided with at least one first rotary seal ring, the first rotary seal ring is fixedly connected with the first fixed mounting ring or the first rotary mounting ring, and a first lubricating channel communicated with the first rotary seal ring is arranged in the side wall of the first fixed mounting ring.

3. The mud sinking machine of claim 2,

a plurality of first compression rings are arranged in the first annular space at intervals from top to bottom, the first compression rings are fixedly connected with the first fixed mounting ring or the first rotary mounting ring, and a first rotary sealing ring is clamped between every two adjacent first compression rings; still seted up the first branch passageway of multichannel in the lateral wall of first fixed mounting ring, first branch passageway with first lubricated passageway intercommunication, every the port of first branch passageway can with correspond first rotary seal ring top first clamping ring sets up relatively.

4. The mud sinking machine of claim 3,

the inner wall of the first pressure ring positioned at the top is embedded with a first inner sealing ring, and a first outer sealing ring is sleeved in the outer wall of the first pressure ring.

5. The mud sinking machine of claim 3,

first clamping ring through first fastener with first fixed mounting ring perhaps first rotatory collar extension is connected, every first clamping ring with between the first fixed mounting ring or with be formed with annular first draw-in groove between the first rotatory collar extension, be formed with first bulge loop on the first rotatory sealing ring, first bulge loop can block to establish and be corresponded in the first draw-in groove.

6. The mud sinking machine of claim 3,

the first compression ring and the first rotary sealing ring are fixedly connected with the first rotary mounting ring, and a detachable first runway ring is hermetically mounted on the inner side of the first fixed mounting ring; the first annular space is formed between the first track ring and the first rotary mounting ring, and a first connecting channel is formed on the first track ring corresponding to the port of each first branch channel;

and a first lower labyrinth ring is arranged at the bottom of the first rotary mounting ring, and the first labyrinth seal cavity is formed between the bottom of the first running ring and the first lower labyrinth ring.

7. The mud sinking machine of claim 3,

the first compression ring and the first rotary sealing ring are fixedly connected with the first fixed mounting ring, a detachable first runway ring is hermetically mounted on the periphery of the first rotary mounting ring, and a first annular space is formed between the first runway ring and the first fixed mounting ring;

and a first lower labyrinth ring is arranged at the bottom of the first fixed mounting ring, and the first labyrinth seal cavity is formed between the bottom of the first running ring and the first lower labyrinth ring.

8. The mud sinking machine of claim 1,

the drive box with the gyration case is the loop configuration, the top of gyration case just is located the inboard position of first bearing with be connected with the second rotary seal subassembly between the inner wall of drive box.

9. The mud sinking machine of claim 8,

the second rotary sealing assembly comprises a second fixed mounting ring and a second rotary mounting ring, the second fixed mounting ring is fixedly connected with the inner wall of the driving box in a sealing manner, and the second rotary mounting ring is fixedly connected with the top of the rotary box in a sealing manner; the second fixed mounting ring with be formed with the second annular space between the rotatory mounting ring of second the top in second annular space is formed with the sealed chamber of second labyrinth be provided with one at least rotatory sealing ring of second in the second annular space, the rotatory sealing ring of second with second fixed mounting ring rigid coupling or with rotatory mounting ring rigid coupling set up in the inner wall of second fixed mounting ring can with the second lubrication channel of second rotatory sealing ring intercommunication.

10. The mud sinking machine of claim 9,

a plurality of second compression rings are arranged in the second annular space at intervals from top to bottom, the second compression rings are fixedly connected with the second fixed mounting ring or the second rotary mounting ring, and a second rotary sealing ring is clamped between every two adjacent second compression rings; still seted up multichannel second branch passageway in the lateral wall of second fixed mounting ring, the second branch passageway with lubricated passageway intercommunication of second, every the port of second branch passageway can with correspond the second rotary seal ring below the second clamping ring sets up relatively.

11. The mud sinking machine of claim 10,

and a second inner sealing ring is embedded in the inner wall of the second pressing ring at the bottom, and a second outer sealing ring is sleeved in the outer wall of the second pressing ring.

12. The mud sinking machine of claim 10,

the second clamping ring passes through the second fastener with second fixed mounting ring perhaps the rotatory collar tie of second, every the second clamping ring with between the second fixed mounting ring or with be formed with annular second draw-in groove between the rotatory collar tie of second, be formed with the second bulge loop on the rotatory collar tie of second, the second bulge loop can block to establish and be corresponded in the second draw-in groove.

13. The mud sinking machine of claim 10,

the second compression ring and the second rotary sealing ring are fixedly connected with the second rotary mounting ring, and a detachable second runway ring is hermetically mounted on the inner side of the second fixed mounting ring; the second annular space is formed between the second track ring and the second rotary mounting ring, and a second connecting channel is formed on the second track ring corresponding to the port of each second branch channel;

and a second upper labyrinth ring is arranged on the top of the second rotary mounting ring, and a second labyrinth seal cavity is formed between the top of the second running ring and the second upper labyrinth ring.

14. The mud sinking machine of claim 10,

the second compression ring and the second rotary sealing ring are fixedly connected with the second fixed mounting ring, a detachable second runway ring is hermetically mounted on the periphery of the second rotary mounting ring, and a second annular space is formed between the second runway ring and the second fixed mounting ring;

and a second upper labyrinth ring is arranged at the top of the second fixed mounting ring, and a second labyrinth seal cavity is formed between the top of the second running ring and the second upper labyrinth ring.

15. The mud sinking machine of claim 1,

the third rotary sealing assembly comprises a third labyrinth sealing cavity and a third rotary sealing ring, an annular groove is formed between the rotary head and the support shell, and the third labyrinth sealing cavity is formed at the notch of the annular groove; at least one third rotary sealing ring is arranged in the annular groove, the third rotary sealing ring is fixedly connected with the rotating head or the supporting shell, and a third lubricating channel which can be communicated with the third rotary sealing ring is formed in the side wall of the supporting shell.

16. The mud sinking machine of claim 15,

and a third upper labyrinth ring and a third lower labyrinth ring which are vertically arranged are arranged outside the notch of the annular groove, the third upper labyrinth ring is fixedly connected with the support shell, the third lower labyrinth ring is fixedly connected with the rotating head, and a third labyrinth sealing cavity is formed between the third upper labyrinth ring and the third lower labyrinth ring.

17. The mud sinking machine of claim 15,

a plurality of third pressure rings are arranged in the annular groove at intervals from top to bottom, the third pressure rings are fixedly connected with the rotating head or the supporting shell, and a third rotary sealing ring is clamped between every two adjacent third pressure rings; still seted up multichannel third branch passageway in the lateral wall of support housing, third branch passageway with the lubricated passageway intercommunication of third, every the port ability of third branch passageway and corresponding third rotary seal ring below the third clamping ring sets up relatively.

18. The mud sinking machine of claim 17,

the gap between the outer wall of the bottom of the supporting shell and the rotating head is located below the annular groove and communicated with the annular groove, and a third sealing ring is clamped between the outer wall of the bottom of the supporting shell and the rotating head.

19. The mud sinking machine of claim 17,

the third clamping ring passes through the third fastener with the rotating head perhaps support the casing and connect, every the third clamping ring with between the rotating head or with be formed with annular third draw-in groove between the support casing, be formed with the third bulge loop on the third rotary seal ring, the third bulge loop can block to establish and correspond in the third draw-in groove.

20. The mud sinking machine of claim 17,

third clamping ring with the third rotary seal ring all with the rotating head rigid coupling support the periphery sealing mounting of casing has detachable third runway ring, third runway ring with form between the rotating head the ring channel corresponds every on the third runway ring one third connecting channel has all been seted up to the port of third branch passageway.

21. The mud sinking machine of claim 17,

the third clamping ring with the third rotary sealing ring all with support the casing rigid coupling rotatory overhead seal installation has detachable third race ring, the third race ring with support and form between the casing the ring channel.

22. The mud sinking machine of claim 15,

the upper end face of the rotating head is provided with a groove, a rotating structure ring is fixedly arranged in the groove in a sealing mode, and the annular groove is formed between the rotating structure ring and the supporting shell.

23. The mud sinking machine of claim 15,

the supporting shell comprises a cutting frame body and a cutting arm which are sealed and fixed up and down, the cutting frame body is of a cylindrical structure with the upper end and the lower end closed, and the cutting arm is of a cylindrical structure with two ends opened;

the side wall of the cutting frame body is provided with an installation opening, a detachable cover plate is hermetically installed at the installation opening, the second driving mechanism is fixedly arranged in the cutting frame body, and a driving shaft of the second driving mechanism can penetrate through the bottom of the cutting frame body and is connected with the rotating head; the rotating shaft is connected with the cutting arm through the second bearing, and the annular groove is formed between the cutting arm and the rotating head.

24. The mud caisson heading machine of claim 1,

the slurry-water open caisson heading machine also comprises a slag discharging device, wherein the slag discharging device comprises a slurry suction bent pipe, a slurry discharging pump, a slurry discharging pipe and a slurry-water separation device, which are sequentially connected from bottom to top, and the slurry-water separation device is placed on the ground;

the mud discharging pump is fixedly connected with the supporting shell, a mud sucking port of the mud sucking bent pipe is right opposite to the side face of the milling and digging head, the shape of the mud sucking port can be matched with the shape of the side face of the milling and digging head, and the mud discharging pipe penetrates through the rotary driving device and can be connected with the mud-water separation equipment.

25. The mud sinking machine of claim 1,

the slurry open caisson heading machine also comprises a supporting device, a propelling device, supporting legs and a rear matching device;

the supporting device comprises a pipe piece, and an underground seat body is fixedly arranged on the inner wall of the pipe piece; the propelling device comprises a propelling driving piece and a sliding box, and the sliding box is arranged on the underground seat body; the first end of the supporting leg is fixedly connected with the driving box, the second end of the supporting leg is fixedly connected with the first end of the propelling driving piece, the second end of the propelling driving piece is fixedly connected with the sliding box, and the propelling driving piece is used for driving the underground main machine of the slurry open caisson heading machine to move up and down; the back matching device comprises a duct piece lifting and pressing device, and the duct piece lifting and pressing device is connected with the duct piece and used for lifting and lowering the duct piece.

26. The mud sinking machine of claim 25,

the propulsion device also comprises an automatic locking mechanism, the sliding box can slide up and down relative to the underground base body, the automatic locking mechanism is arranged on the sliding box, and the automatic locking mechanism can relatively fix the sliding box and the underground base body; the back matching device also comprises a recovery hoisting device which is used for lifting or lowering the underground main machine of the muddy water open caisson heading machine.

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