CN213510565U - Hydraulic cutting device - Google Patents

Abstract

The utility model discloses a hydraulic cutting device, which comprises a high-pressure water closet, a drill rod joint, a high-pressure water-through drill rod, an ejector and a guider or a drill bit which are connected in sequence, wherein a cutting nozzle is arranged on the ejector; the high-pressure water is rotationally connected with the high-pressure water-through drill rod, the high-pressure water is connected with the water inlet pipe joint, and the water inlet pipe joint is connected with the high-pressure water pump. The utility model has high water flow capacity and large flow, and provides enough energy for coal bed fracturing; and the coal bed fracturing operation is simple, the operation intensity is small, and the potential safety hazard is low. The utility model is suitable for a technical field of coal seam fracturing.

Description

Hydraulic cutting device

Technical Field

The utility model belongs to the technical field of coal seam fracturing, specifically speaking relates to a hydraulic cutting device.

Background

At present, the common means of the coal seam fracturing mode are as follows: and drilling the coal bed by using a drilling machine, extending the fracturing pipe into a preset position in a drilled hole after the drilling is finished, and providing high-pressure water for the fracturing pipe by using a high-pressure water pump, wherein the high-pressure water jets into the gap of the coal bed and fractures the coal bed. By adopting the mode, the different heights and different angles of the fracturing pipes extending into the drill holes need to be adjusted, and further, the fracturing of different positions of the coal bed is realized. Like this for the process of coal seam fracturing is complicated, and operating strength is big, at the in-process of adjustment fracturing pipe, has intensity of labour big, the problem that the potential safety hazard is many.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high water flow pressure, large flow and enough energy for coal bed fracturing; and the coal seam fracturing operation is simple, the operation intensity is small, and the potential safety hazard is low.

In order to achieve the above object, the utility model adopts the following technical scheme:

a hydraulic cutting device comprises a high-pressure water closet, a drill rod joint, a high-pressure water-through drill rod, an ejector and one of a guider or a drill bit which are connected in sequence, wherein a cutting spray head is arranged on the ejector; the high-pressure water is rotationally connected with the high-pressure water-through drill rod, the high-pressure water is connected with the water inlet pipe joint, and the water inlet pipe joint is connected with the high-pressure water pump.

Furthermore, the high-pressure water device comprises a switching rod which is rotatably assembled in the main body, a drilling machine switching end of the switching rod and a drilling rod switching end of the switching rod respectively extend out of the main body, the switching rod is provided with a water passing channel communicated with a water containing cavity in the main body, a water inlet pipe joint communicated with the water containing cavity is detachably connected to the main body, and the drilling machine switching end and the drilling rod connecting end of the switching rod are respectively connected with the drilling machine and the hollow drilling rod.

Furthermore, a water stopping unit is assembled between the adapter rod and the main body, and the water containing cavity is formed between the two water stopping units; the two ends of the main body are respectively detachably provided with an assembling seat, and each assembling seat is respectively abutted against the corresponding water stopping unit.

Furthermore, bearings are respectively assembled on the assembling seats, the bearings are sleeved on the adapter rod, and an end cover which compresses the bearings on the assembling seats is detachably connected to one end, far away from the main body, of each assembling seat.

Furthermore, the water stopping unit comprises a water stopping sleeve sleeved on the switching rod and abutted to the inner wall of the main body through an outer wall, an outer sealing ring is sleeved on the outer wall of the water stopping sleeve, an assembling cavity is formed in one end face, close to the water containing cavity, of the water stopping sleeve, the water stopping rubber ring is installed in the assembling cavity, the inner wall of the water stopping rubber ring is in contact with the outer wall of the switching rod, a check ring is installed at one end, close to the water containing cavity, of the water stopping sleeve, and the check ring is limited in the main body through a clamp spring installed in the main body.

Furthermore, the high-pressure water-through drill rod comprises a rod body, a water guide channel is arranged in the rod body and extends along the length direction of the rod body, a drill rod joint connecting end and a jet device connecting end are respectively arranged at two ends of the rod body, the rod body is connected with the drill rod joint through the drill rod joint connecting end, the drill rod joint is provided with a communicating channel communicated with the water guide channel, the caliber of the communicating channel is smaller than that of the water guide channel, a contracted flow channel communicated with the water guide channel is arranged at the jet device connecting end of the rod body, and the caliber of the contracted flow channel is smaller than that of the water guide channel.

Furthermore, an inserting cavity is formed between the connecting end of the drill rod joint and the water guide channel, and the drill rod joint is provided with a first inserting part which extends into the rod body from the connecting end of the drill rod joint and is assembled in the inserting cavity.

Furthermore, the plurality of the rod bodies are sequentially connected in the head position.

Furthermore, the jet device comprises a jet device body, a first connecting nozzle and a second connecting nozzle are respectively formed at the two axial ends of the jet device body, the jet body is provided with a socket cavity which is formed in the jet body and is communicated with a first connecting nozzle and a second connecting nozzle, the end part of the high-pressure water-through drill rod is connected with the first connecting nozzle and extends into the socket cavity, the second connecting nozzle is connected with a guider or a drill bit, one end of the connected guider or drill bit extends into the socket cavity, a plurality of assembling holes are arranged on the jet body and at the gap position between the end part of the high-pressure water-through drill rod extending into the socket cavity and the end part of the guider or drill bit extending into the socket cavity, the plurality of assembling holes are arranged at intervals along the circumferential direction of the jet body, at least one cutting nozzle is detachably connected to the jet body through the corresponding assembling hole, and the assembling hole which is not provided with the cutting nozzle is plugged through a plug.

Further, the cutting nozzle comprises a flow gathering part, a connecting part and a jet part which are integrally formed along the flow direction of high-pressure water, and the connecting part is in threaded connection with the assembling hole; the end of the flow gathering part close to the socket cavity is an arc surface sunken along the jet flow direction of high-pressure water, a plurality of flow gathering holes communicated with the socket cavity through the arc surface are constructed on the flow gathering part, a jet hole is constructed on the jet flow part, and one ends of the flow gathering holes far away from the arc surface are gathered at the water inlet end of the jet hole.

The utility model discloses owing to adopted foretell structure, it compares with prior art, and the technical progress who gains lies in: the drilling machine is connected with the hollow high-pressure water-through drill rod through high-pressure water, and drives the high-pressure water-through drill rod to rotate and drill the coal bed; meanwhile, high-pressure water enters the high-pressure water-through drill rod through the high-pressure water, and enters the ejector through the high-pressure water-through drill rod, the high-pressure water is ejected by a cutting nozzle on the ejector, and the coal seam is fractured at different heights and angles, and the drilling speed of a drilling machine can be controlled according to different depths and specific conditions of the coal seam, so that the coal seam is fully fractured; the utility model discloses a rotatable formula leads to water equipment, its advantage is: the water flowing pressure is high, the flow rate is large, and enough energy is provided for coal bed fracturing; therefore, the utility model has the characteristics of coal seam fracturing operation is simple, and operation intensity is little, and the potential safety hazard is low.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

fig. 1 is a sectional view of an axial structure of an embodiment of the present invention;

fig. 2 is a sectional view of an axial structure of an embodiment of the present invention;

fig. 3 is an exploded view of the structure of the embodiment of the present invention;

fig. 4 is a schematic structural view of the water stopping unit mounted on the adapter rod according to the embodiment of the present invention;

fig. 5 is a schematic structural view of a water stopping unit according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a water stop sleeve according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a water stop rubber ring according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of an embodiment of the present invention in conjunction with a tool joint;

FIG. 9 is a cross-sectional view of an axial structure of an embodiment of the present invention in connection with a tool joint;

fig. 10 is a sectional view of an axial structure of an embodiment of the present invention;

FIG. 11 is an axial structural cross-sectional view of a jet body according to an embodiment of the present invention;

FIG. 12 is a schematic view of the jet body and drill bit or pilot according to an embodiment of the present invention;

fig. 13 is a schematic structural view of a cutting nozzle according to an embodiment of the present invention;

FIG. 14 is a schematic view of the structure of FIG. 4 from another angle;

fig. 15 is a sectional view of an axial structure of a cutting nozzle according to an embodiment of the present invention;

fig. 16 is a schematic structural view of a guide or drill according to an embodiment of the present invention.

Labeling components: 100-main body, 101-adapter rod, 102-water stop sleeve, 1021-assembly cavity, 103-water stop rubber ring, 1031-rubber seat, 1032-inner sealing ring, 104-outer sealing ring, 105-retainer ring, 106-snap spring, 107-assembly seat, 108-first bolt, 109-bearing, 110-end cover, 111-end sealing ring, 112-second bolt, 113-water containing cavity, 114-water inlet pipe joint, 115-interface, 116-water channel, 200-drill rod joint, 201-high-pressure water connection end, 202-first connection part, 203-first plug part, 204-communication channel, 205-first sealing ring, 300-high-pressure water through drill rod, 301-rod body, 302-water guide channel, 303-plug cavity, 304-tool joint connection end, 305-second connection part, 306-second plug part, 307-converging channel, 308-second sealing ring, 400-fluidic body, 401-socket cavity, 402-first connection nozzle, 403-second connection nozzle, 404-assembly hole, 405-operation recess, 500-cutting nozzle, 501-converging part, 502-connection part, 503-fluidic part, 504-converging hole, 505-fluidic hole, 506-cross groove, 600-guide or drill bit, 601-connector, 602-socket part, 603-third sealing ring.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the invention.

The utility model discloses a hydraulic cutting device, as shown in figure 1, including the high pressure water that connects gradually just, tool joint 200, high pressure lead to one of water drilling rod 300, ejector, cutting shower nozzle 500 and director or drill bit 600 the two. The high-pressure water is rotatably connected with the high-pressure water drill pipe 300, the high-pressure water is connected with the water inlet pipe joint 114, and the water inlet pipe joint 114 is connected with the high-pressure water pump. The utility model discloses a theory of operation and advantage lie in: the drilling machine is connected with the drilling machine switching end of the switching rod 101, the hollow high-pressure water-through drill rod 300 is connected with the drill rod switching end of the switching rod 101, and the drilling machine drives the switching rod 101 to drive the high-pressure water-through drill rod 300 to rotate and drill a coal bed; meanwhile, high-pressure water enters the water containing cavity 113 through the water inlet pipe joint 114 and enters the high-pressure water through drill rod 300 through the water containing cavity 113, along with the drilling of the high-pressure water through drill rod 300, the high-pressure water is sprayed out by a cutting spray head 500 on the ejector, the coal bed is fractured at different heights and angles, the drilling speed of the drilling machine can be controlled according to different depths and specific conditions of the coal bed, and further the coal bed is fractured fully; the utility model discloses a rotatable formula leads to water equipment, its advantage is: the water flowing pressure is high, the flow rate is large, and enough energy is provided for coal bed fracturing; therefore, the utility model has the characteristics of coal seam fracturing operation is simple, and operation intensity is little, and the potential safety hazard is low.

As a preferred embodiment of the present invention, as shown in fig. 2, the high pressure water includes a main body 100 and an adapting rod 101, the main body 100 is a hollow sleeve, the adapting rod 101 is assembled in the main body 100 and rotatably connected with the main body 100, two ends of the adapting rod 101 are respectively a drilling machine adapting end and a drilling rod adapting end, the drilling machine adapting end and the drilling rod adapting end are respectively used for being connected with a drilling machine and a hollow high pressure water-through drilling rod 300, the drilling machine adapting end and the drilling rod adapting end extend out of the axial two ends of the main body 100 respectively, the main body 100 has a water containing cavity 113, a water passing channel 116 communicated with the water containing cavity 113 is formed in the adapting rod 101, and the water passing channel 116 is communicated with the hollow part of the high pressure water-through drilling rod 300. A water inlet nipple 114 communicating with the water containing chamber 113 is detachably connected to the main body 100 by means of a screw connection.

As a preferred embodiment of the present invention, as shown in fig. 4 to 7, a water stop unit is assembled between the adapter rod 101 and the main body 100, and a water containing cavity 113 is formed between the two water stop units. The effect of setting up stagnant water unit is the phenomenon of the emergence leakage after preventing that the water under high pressure from getting into this embodiment to avoid each component parts life-span of this embodiment to shorten, and avoid the water under high pressure to be let out pressure and the fracturing effect causes the influence simultaneously. Wherein, the concrete structure of this embodiment stagnant water unit does: the water stopping unit comprises a water stopping sleeve 102 sleeved on the adapter rod 101, the outer wall of the water stopping sleeve 102 abuts against the inner wall of the main body 100, an annular groove is formed in the outer wall of the water stopping sleeve 102, an outer sealing ring 1034 is sleeved on the water stopping sleeve 102 and assembled in the groove, and the outer sealing ring 1034 is tightly attached to the inner wall of the main body 100; in the embodiment, an assembly cavity 1021 is formed on the end face of the water stop sleeve 102 close to one end of the water containing cavity 113, the water stop rubber ring 103 is installed in the assembly cavity 1021, and the inner wall of the water stop rubber ring 103 is in contact with the outer wall of the adapter rod 101; the outer sealing ring 1034 and the water-stopping rubber ring 103 are used for preventing high-pressure water from leaking from the joint of the water-stopping sleeve 102 and the main body 100 and the joint of the water-stopping sleeve 102 and the adapter rod 101, and simultaneously ensuring that the relative rotation of the adapter rod 101 and the main body 100 is not influenced; the water stopping rubber ring 103 comprises a rubber seat 1031 embedded in the assembly cavity 1021, an inner sealing ring 1032 is embedded between the rubber seat 1031 and the peripheral wall of the assembly cavity 1021, and the inner surface of the rubber seat 1031 is sleeved on the adapter rod 101; a retaining ring 105 is mounted on the water stop 102 near the end of the water receiving cavity 113, the retaining ring 105 being retained within the body 100 by a retaining spring 106 mounted within the body 100. In order to fully seal water and prevent leakage, the water-sealing sleeve 102, the outer sealing ring 1034 and the water-sealing rubber ring 103 are combined into at least two groups, and are sequentially and tightly attached to each other along the axial direction of the adapter rod 101. And the two ends of the main body 100 are respectively provided with an assembling seat 107 in a detachable way through a plurality of first bolts 108, and each assembling seat 107 is respectively abutted against the end surface of the corresponding water stop sleeve 102, so that the assembling seats 107 are matched with the corresponding snap springs 106, and the fixing of the axial position of the water stop unit and the adapter rod 101 is realized.

As a preferred embodiment of the present invention, as shown in fig. 1 and fig. 2, a protrusion extending into the end of the corresponding end of the main body 100 is formed at one end of the mounting seat 107 close to the water containing cavity 113, and the protrusion is pressed against the water stop sleeve 102; a cavity is formed at the other end of the assembling seat 107, a bearing 109 is assembled in the cavity, the bearing 109 is assembled on the adapter rod 101, an end cover 110 is detachably connected to one end of each assembling seat 107 far away from the main body 100 through a plurality of second bolts 112, the end cover 110 is used for pressing the corresponding bearing 109 on the assembling seat 107, and an end sealing ring 111 with an X-shaped section is embedded at the joint of the end cover 110 and the adapter rod 101.

As a preferred embodiment of the present invention, as shown in fig. 4, the water passing channel 116 is formed by extending a drill rod connection end from the position of the connection rod 101 located in the water containing cavity 113 along the axial direction of the connection rod 101, a plurality of communication holes are formed on the circumferential surface of the connection rod 101 and located in the water containing cavity 113, and each communication hole is respectively communicated with the water passing channel 116 and the water containing cavity 113. The number of the communication holes and the length and the caliber of the water passage 116 are selected, and the design is carried out according to the torque resistance of the adapter rod 101, so that the strength of the adapter rod 101 is improved, and the deformation or twist-off accidents under the condition of large torque are avoided.

As a preferred embodiment of the present invention, as shown in fig. 2 and 3, the main body 100 is provided with a connector 115, the connector 115 is communicated with the water containing cavity 113, and the water inlet pipe connector 114 is connected with the connector 115 by a screw, and the water inlet pipe connector 114 is used for being connected with an outlet of a high pressure water pump, so as to provide high pressure cutting water for the present embodiment.

As a preferred embodiment of the present invention, as shown in fig. 8-10, the high-pressure water drill rod 300 includes a rod body 301, a blade spirally continuous along its axial direction is constructed on the circumferential wall of the rod body 301, the two ends of the rod body 301 are respectively a drill rod joint connecting end 304 and an ejector connecting end, a water guide channel 302 coinciding with its axis is formed in the rod body 301, the water guide channel 302 extends to the drill rod joint connecting end 304 and the ejector connecting end along the length direction of the rod body 301, the rod body 301 is connected with the drill rod joint 200 through the drill rod joint connecting end 304, the rod body 301 is connected with the ejector through the ejector connecting end, and the jet device is provided with a cutting nozzle 500. The drill rod joint 200 is provided with a communication channel 204 communicated with the water guide channel 302, the ejector connecting end of the rod body 301 is provided with a flow contracting channel 307 communicated with the water guide channel 302, and the calibers of the communication channel 204 and the flow contracting channel 307 are smaller than the calibers of the water guide channel 302. The working principle and the advantages of the embodiment are as follows: the two ends of the rod body 301 are respectively connected with the drill rod joint 200 and the ejector, the drill rod joint 200 is connected with the high-pressure water closet 100, the high-pressure water closet 100 is rotatably connected with the drilling machine, the high-pressure water enters the rod body 301 through the high-pressure water closet 100 through the drill rod joint 200, the high-pressure water enters the water guide channel 302 communicated with the high-pressure water through the communication channel 204 of the drill rod joint 200 and is ejected into a seam of a coal seam through the ejector pump to be fractured; because the caliber of the water guide channel 302 of the rod body 301 is larger than the caliber of the communication channel 204 and the contracted flow channel 307, when high-pressure water enters the water guide channel 302, the pressure and the flow speed are reduced, and the pressure and the flow speed are improved when the high-pressure water flows to the contracted flow channel 307, so that the pressure of the high-pressure water is not lost before fracturing, the water pressure born by the rod body 301 is reduced, and the service life of the rod body is prolonged; just the utility model discloses to the continuous fracturing of coal seam at the in-process that creeps into to the coal seam, and then make the coal seam fracturing operation simple, operation intensity is little, and the potential safety hazard is low.

As a preferred embodiment of the present invention, as shown in fig. 9, the tool joint 200 has a first connection portion 202, a first insertion portion 203 and a high pressure water connection end 201, the three are integrally formed, an insertion cavity 303 is formed in the shaft 301 and between the tool joint connection end 304 and the water guide channel 302, the first insertion portion 203 extends into the shaft 301 from the tool joint connection end 304 and is assembled in the insertion cavity 303, and in order to seal sufficiently, at least one first sealing ring 205 is nested on the outer surface of the first insertion portion 203, and the number of the first sealing rings 205 in this embodiment is two. The first connecting portion 202 is a circular truncated cone-shaped structure, the drill rod joint connecting end 304 is provided with a threaded hole with an inward caliber gradually reduced along the axis of the rod body 301, the first connecting portion 202 is matched with the threaded hole, and the drill rod joint 200 is fixed with the drill rod joint connecting end 304 through the threaded connection between the first connecting portion 202 and the threaded hole.

As a preferred embodiment of the present invention, as shown in fig. 9 and 10, the ejector connecting end has a second connecting portion 305 whose diameter is gradually reduced toward the outside along the axial direction of the shaft 301, and the above-mentioned contracted flow channel 307 is formed in the second connecting portion 305 and the axes thereof coincide with each other. The small-diameter end of the second connecting portion 305 is formed with a second plug-in portion 306 extending outwards along the axis thereof, the contracted flow channel 307 extends out of the second plug-in portion 306 from the second connecting portion 305, and the joint of the contracted flow channel 307 and the water guide channel 302 is in smooth transition. The second connection portion 305 is screwed with the ejector, and adopts a structure for improving the shearing resistance of the connection portion, by making the connection tighter. And at least one second sealing ring 308 is nested on the outer surface of the first inserting part for sufficient sealing, wherein the number of the second sealing rings 308 is preferably two in the embodiment.

As a preferred embodiment of the present invention, the diameter of the flow contracting channel 307 is not larger than the communicating channel 204, so that the pressure of the fracturing can be fully ensured, the kinetic energy loss of the high-pressure water is avoided, and the maximum water pressure can be ensured to reach 100 MPa.

As a preferred embodiment of the present invention, the diameter of the rod body 301 is phi 42 cm-phi 73cm, and the preferred diameters are phi 42cm, phi 50cm and phi 73cm, and for different rod bodies 301, the drill rod joint 200 can be replaced for use without replacing the whole set of equipment.

As a preferred embodiment of the present invention, according to the depth of the coal seam drilled at one time, one or more shafts 301 may be selected from the number of the shafts 301, when there are a plurality of shafts 301, the shafts 301 are sequentially connected to the head, and the second connecting portion 305 of the previous shaft 301 is screwed into the screw hole of the next shaft 301, and the blades of the connected shafts 301 are continuous and continuous. The connection position of the two rod bodies 301 is in taper threaded connection, the connection strength is high, the anti-shearing capacity is high, the connection of the inner walls of the rod bodies 301 is realized by the connection of the upper contracted flow channel 307 and the lower water guide channel 302, so that high-pressure water is subjected to flow limiting and pressurization at intervals between the rod bodies 301, the situation that the shearing strength of the rod body 301 body is low due to the fact that the high-pressure water flow path is too long is avoided, meanwhile, the fracturing pressure of the high-pressure water is kept in an expected range due to the fact that the pressure boosting is interrupted, the situation that the load of a power source (a high-pressure water pump) is large due to the fact that.

As a preferred embodiment of the present invention, as shown in fig. 11 and 12, the ejector includes an ejector body 400, a first connection nozzle 402 and a second connection nozzle 403 are respectively formed at both axial ends of the ejector body 400, the ejector body 400 has a socket 401, the socket 401 is formed inside the ejector body 400, and the socket 401 is respectively communicated with the first connection nozzle 402 and the second connection nozzle 403, the end of the high-pressure water-passing drill rod 300 is connected with the first connection nozzle 402 and extends into the socket 401, the second connection nozzle 403 is connected with a guide or a drill bit 600, and one end of the connected guide or drill bit 600 extends into the socket 401; a plurality of assembling holes 404 are arranged on the jet body 400 at intervals along the circumferential direction of the jet body, the assembling holes 404 are respectively communicated with the socket cavity 401 and are positioned at a gap position between the end part of the high-pressure water-through drill rod 300 extending into the socket cavity 401 and the end part of the guider or drill 600 extending into the socket cavity 401, wherein at least one cutting nozzle 500 is detachably connected on the jet body 400 through the corresponding assembling hole 404, and the assembling hole 404 without the cutting nozzle 500 is blocked by a plug. The working principle and the advantages of the embodiment are as follows: because the utility model is communicated with the high-pressure water-through drill rod 300, high-pressure water enters the socket cavity 401 from the high-pressure water-through drill rod 300 and is sprayed into the seam of the coal seam through the cutting nozzle 500, thereby realizing the fracturing operation, and the coal seam is gradually fractured from shallow to deep along with the feeding of the guider or the drill bit 600; due to the combination of the jet body 400 and the cutting spray heads 500, according to the flow and the pressure of the high-pressure water pump, the combination of the cutting spray heads 500 and the plugs with different specifications is selected, the number of the cutting spray heads 500 is properly selected, and the rest assembling holes 404 are plugged by the plugs, so that the maximum cutting radius can be achieved by adopting the above form, and the cutting efficiency is maximized; the end part of the high-pressure water-through drill rod 300 is connected with the first connecting nozzle 402 and extends into the socket cavity 401, so that the caliber of the socket cavity 401 is larger than that of the end part of the high-pressure water-through drill rod 300, and the high-pressure water in the socket cavity 401 is ensured to be in a full state all the time, so that sufficient high-pressure water can be provided for each cutting nozzle 500, and the phenomenon that the cutting nozzles 500 are broken due to insufficient water in the socket cavity 401 is avoided, and the cutting effect is reduced; when the jet body 400 is connected with the guider, the guider plays a role in guiding when being used for conveying the jet body 400 and the high-pressure water-through drill rod 300 into the hole and can prevent the jet body 400 and the high-pressure water-through drill rod from deviating and clamping, the jet can be drilled once after the guider is changed into a drill bit, and the jet body 400 is installed after the drill rod is withdrawn after the drill hole is not drilled.

As a preferred embodiment of the present invention, as shown in fig. 1, the first connection nozzle 402 and the second connection nozzle 403 are each a trumpet-shaped screw port that tapers toward the socket 401 along the axial direction of the jet body 400, and as shown in fig. 16, the guide and the drill bit each have a connection head 601 that is fitted and screwed to the second connection nozzle 403. Therefore, the connection between the jet body 400 and the high-pressure water drill pipe 300 through the first connecting nozzle 402 and the connection between the second connecting nozzle 403 and the guider or drill bit 600 have high connection strength and high shearing resistance.

As a preferred embodiment of the present invention, as shown in fig. 11, a socket portion 602 extending to the socket 401 along the axis is formed at the end of the connecting head 601, the socket portion 602 is inserted into the socket 401, and the outer wall of the socket portion is attached to the inner wall of the socket 401. And in order to improve the sealing performance, at least one third sealing ring 603 is nested on the circumferential surface of the socket part 602 in the embodiment.

As a preferred embodiment of the present invention, as shown in fig. 12, a plurality of operation recesses 405 are formed on the circumferential outer wall of the jet body 400, and the operation recesses 405 are uniformly arranged along the circumferential direction of the jet body 400, so that an operator can use a tool to assemble and disassemble the jet body 400.

As a preferred embodiment of the present invention, as shown in fig. 13 to 15, the cutting nozzle 500 includes a flow collecting portion 501, a connecting portion 502 and a jet portion 503 integrally formed along the flow direction of high pressure water, so as to facilitate the manufacturing process, and an external thread is formed on the outer circumferential surface of the connecting portion 502, and the connecting portion 502 is screwed with the mounting hole 404. One end of the flow gathering part 501 close to the socket cavity 401 is an arc surface which is sunken along the jet flow direction of high-pressure water, a plurality of flow gathering holes 504 which are communicated with the socket cavity 401 through the arc surface are formed in the flow gathering part 501, a jet hole 505 is formed in the jet flow part 503, and one end, far away from the arc surface, of each flow gathering hole 504 is gathered at the water inlet end of the jet hole 505. The high-pressure water in the socket cavity 401 is converged at the jet hole 505 by the converging hole 504 and is jetted out from the jet hole 505, so that the jetted water pressure is improved, and the cutting efficiency is improved. And a cross-shaped groove 506 is formed on the end surface of the jet part 503 far away from the socket cavity 401, so that an operator can use a tool to assemble and disassemble the tool.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the protection of the claims of the present invention.

Claims (10)

1. A hydraulic cutting device characterized by: the device comprises a high-pressure water closet, a drill rod joint, a high-pressure water-through drill rod, an ejector and one of a guider or a drill bit which are connected in sequence, wherein a cutting spray head is arranged on the ejector; the high-pressure water is rotationally connected with the high-pressure water-through drill rod, the high-pressure water is connected with the water inlet pipe joint, and the water inlet pipe joint is connected with the high-pressure water pump.

2. A hydraulic cutting device according to claim 1, wherein: the high-pressure water device comprises a switching rod which is rotatably assembled in the main body, a drilling machine switching end and a drilling rod switching end of the switching rod respectively extend out of the main body, the switching rod is provided with a water passing channel communicated with a water containing cavity in the main body, a water inlet pipe joint communicated with the water containing cavity is detachably connected to the main body, and the drilling machine switching end and the drilling rod connecting end of the switching rod are respectively connected with the drilling machine and the hollow drilling rod.

3. A hydraulic cutting device according to claim 2, wherein: a water stopping unit is assembled between the adapter rod and the main body, and the water containing cavity is formed between the two water stopping units; the two ends of the main body are respectively detachably provided with an assembling seat, and each assembling seat is respectively abutted against the corresponding water stopping unit.

4. A hydraulic cutting device according to claim 3, wherein: and bearings are respectively assembled on the assembling seats, the bearings are sleeved on the adapter rod, and one end of each assembling seat, which is far away from the main body, is detachably connected with an end cover which compresses the bearings on the assembling seats.

5. A hydraulic cutting device according to claim 3, wherein: the water stopping unit comprises a water stopping sleeve sleeved on the switching rod and abutted to the inner wall of the main body through the outer wall, an outer sealing ring is sleeved on the outer wall of the water stopping sleeve, an assembling cavity is formed in one end face, close to the water containing cavity, of the water stopping sleeve, the water stopping rubber ring is installed in the assembling cavity, the inner wall of the water stopping rubber ring is in contact with the outer wall of the switching rod, a check ring is installed at one end, close to the water containing cavity, of the water stopping sleeve, and the check ring is limited in the main body through a clamp spring installed in the main.

6. A hydraulic cutting device according to claim 1, wherein: the high-pressure water-through drill rod comprises a rod body, wherein a water guide channel is arranged in the rod body and extends along the length direction of the rod body, a drill rod joint connecting end and an ejector connecting end are respectively arranged at two ends of the rod body, the rod body is connected with the drill rod joint through the drill rod joint connecting end, the drill rod joint is provided with a communicating channel communicated with the water guide channel, the caliber of the communicating channel is smaller than that of the water guide channel, a contracted flow channel communicated with the water guide channel is arranged at the ejector connecting end of the rod body, and the caliber of the contracted flow channel is smaller than that of the water guide channel.

7. A hydraulic cutting device according to claim 6, wherein: an insertion cavity is formed between the connection end of the drill rod joint and the water guide channel, and the drill rod joint is provided with a first insertion part which extends into the rod body from the connection end of the drill rod joint and is assembled in the insertion cavity.

8. A hydraulic cutting device according to claim 6, wherein: the rod body is a plurality of, and head is connected in proper order.

9. A hydraulic cutting device according to claim 1, wherein: the jet device comprises a jet device body, a first connecting nozzle and a second connecting nozzle are formed at two axial ends of the jet device body respectively, the jet device body is provided with a socket cavity which is formed inside the jet device body and is communicated with the first connecting nozzle and the second connecting nozzle, the end part of a high-pressure water-through drill rod is connected with the first connecting nozzle and extends into the socket cavity, the second connecting nozzle is connected with a guider or a drill bit, one end of the connected guider or the drill bit extends into the socket cavity, a plurality of assembling holes are formed in the gap position between the end part of the high-pressure water-through drill rod extending into the socket cavity and the end part of the guider or the drill bit extending into the socket cavity on the jet device body, the assembling holes are arranged at intervals along the circumferential direction of the jet device body, at least one cutting nozzle is detachably connected to the jet device body through the corresponding assembling hole, and the assembling hole of the unassembled cutting nozzle is.

10. A hydraulic cutting device according to claim 9, wherein: the cutting nozzle comprises a flow gathering part, a connecting part and a jet part which are integrally formed along the flow direction of high-pressure water, and the connecting part is in threaded connection with the assembling hole; one end of the flow gathering part close to the socket cavity is a cambered surface which is sunken along the jet flow direction of high-pressure water, a plurality of channels are constructed on the flow gathering part, a flow gathering hole is formed by the cambered surface and the socket cavity, a jet hole and a plurality of flow gathering holes are constructed on the jet flow part, and one end, far away from the cambered surface, of each flow gathering hole is gathered at the water inlet end of the jet hole.

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