CN113770921B - Advanced premixing abrasive water jet equipment and generation method - Google Patents
Advanced premixing abrasive water jet equipment and generation method Download PDFInfo
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- CN113770921B CN113770921B CN202111177012.8A CN202111177012A CN113770921B CN 113770921 B CN113770921 B CN 113770921B CN 202111177012 A CN202111177012 A CN 202111177012A CN 113770921 B CN113770921 B CN 113770921B
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- pipeline
- abrasive
- grouting pump
- pump
- mixed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
- B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
- B24C7/0015—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
- B24C7/0023—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier of feed pressure
Abstract
The invention discloses an advanced pre-mixing abrasive water jet device and a generation method, wherein the advanced pre-mixing abrasive water jet device comprises: the device comprises a stirring barrel, a stirrer, a feeding pump, a grouting pump and a nozzle; wherein, a stirrer capable of circularly stirring the inside of the stirring barrel is arranged in the stirring barrel; the bottom of the stirring barrel is communicated with the input end of the feeding pump by a first pipeline; the output end of the feeding pump is communicated with the liquid inlet end of the three-way ball valve by adopting a second pipeline; one liquid outlet end of the three-way ball valve is communicated with the stirring barrel by a third pipeline, and the other liquid outlet end of the three-way ball valve is communicated with a feed inlet of a grouting pump by a fourth pipeline; and the discharge port of the grouting pump is communicated with the nozzle by adopting a high-pressure hose.
Description
Technical Field
The invention relates to the technical field of abrasive water jet, in particular to an advanced premixing abrasive water jet device and a generating method.
Background
Abrasive water jet technology is a new technology developed recently and has wide application in the aspects of industrial cutting, rock tunneling, surface cleaning, drilling and exploitation and the like. According to different charging modes, the abrasive water jet is divided into a pre-mixed abrasive water jet and a post-mixed abrasive water jet. The post-mixing abrasive water jet cannot fully mix the abrasive with the high-speed flowing water, so that the transmission efficiency of the water medium to the abrasive is obviously reduced, the acceleration time of the abrasive is short, and the acceleration is insufficient, so that the post-mixing abrasive water jet has poor rock breaking capacity in the aspects of rock tunneling, drilling exploitation and the like, and cannot be used due to the limitation of engineering environment. Meanwhile, although the abrasive of the pre-mixed abrasive water jet is uniformly mixed, the acceleration time of the abrasive is long, and the coal rock breaking effect is good, a key problem for limiting the large-scale application of the pre-mixed abrasive water jet is the continuous feeding problem of the abrasive; in addition, the water cushion effect is obvious when the front mixed abrasive water jet and the rear mixed abrasive water jet break coal rocks, the energy utilization rate is low, and the coal rock breaking effect is poorer than that of pulse type abrasive water jet.
In order to realize the real continuous feeding of the front mixed abrasive jet, the 'double-tank double-pump type front mixed abrasive jet continuous working system' (CN107953270B) adopts two high-pressure abrasive tanks and two high-pressure water pumps to alternately work to realize the continuous feeding, but the equipment has a complex structure, the mixed sand ratio cannot be accurately controlled, and meanwhile, the working system is continuous jet and has an obvious water cushion effect.
Therefore, there is a need to provide an advanced pre-mixed abrasive water jet apparatus and method of generation to address the above-mentioned problems.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: an advanced premixing abrasive water jet device comprises a stirring barrel, a stirrer, a feeding pump, a grouting pump and a nozzle;
wherein, a stirrer capable of circularly stirring the inside of the stirring barrel is arranged in the stirring barrel;
the bottom of the stirring barrel is communicated with the input end of the feeding pump by a first pipeline;
the output end of the feeding pump is communicated with the liquid inlet end of the three-way ball valve by adopting a second pipeline;
one liquid outlet end of the three-way ball valve is communicated with the stirring barrel by a third pipeline, and the other liquid outlet end of the three-way ball valve is communicated with a feed inlet of a grouting pump by a fourth pipeline;
the discharge hole of the grouting pump is communicated with the nozzle through a high-pressure hose.
Further, preferably, the grouting pump is a plunger type grouting pump, and the maximum pressure thereof is 40 MPa.
Further, preferably, a cut-off type pulse jet flow generating device is further arranged at an outlet of the nozzle, and the cut-off type pulse jet flow generating device mainly comprises a motor, a rotating shaft and a cut-off disc;
the cutting disc is provided with holes, the cutting disc is coaxially and fixedly connected with the rotating shaft, and the rotating shaft is driven by the motor.
Further, preferably, the outermost circle of the cutoff disc is provided with 24 circular holes distributed in a circumferential array, the middle circle is provided with 12 circular holes distributed in a circumferential array, the inner circle is provided with 6 circular holes distributed in a circumferential array, and when jet flow sprayed by the nozzle passes through the circular holes, the jet flow passes through the circular holes; without passing through the circular orifice, the jet is intercepted, forming a pulsed abrasive water jet.
Further, preferably, a feed inlet of the grouting pump is communicated with the pipeline in a three-phase manner by adopting a pipeline five;
the discharge hole of the grouting pump is communicated with the pipeline five through a pipeline six.
Further, preferably, the agitator includes:
the inner rotating shaft is rotatably arranged in the stirring barrel and is driven to rotate by an external stirring motor, and a first spiral blade, a second spiral blade and a guide vane are coaxially and sequentially fixed at the bottom of the inner rotating shaft from top to bottom;
the outer fixed cylinder is fixed in the stirring barrel, sleeved outside the inner rotating shaft and matched with the second spiral blade to suck the abrasive material mixed water;
the lifting cylinder is fixed inside the outer fixed cylinder and is used for being matched with the first spiral blade so as to suck the mixed liquid; and
the internal circulation pipe is configured to be a plurality of internal circulation pipes arranged in a circumferential array, and each internal circulation pipe is communicated with the external fixed cylinder.
Further, preferably, the outer diameter of the second helical blade is larger than the outer diameter of the first helical blade.
Further, preferably, the liquid outlet end of the inner circulating pipe extends and distributes outwards along the radial direction of the outer fixed cylinder.
Further, preferably, the bottom of the outer fixed cylinder is connected with a guide head sleeved outside the guide vane;
the guide head comprises a connecting ring, guide blades and a connecting seat;
the two connecting rings are arranged in an up-down symmetrical mode, the two connecting rings are connected through a plurality of connecting rods, guide blades are distributed between every two adjacent connecting rods, and a flow guide channel can be formed between every two adjacent guide blades;
the connecting ring positioned on the upper part is connected with the outer fixed cylinder by adopting a connecting seat, and the connecting seat is provided with a circulating hole.
A method of generating a pre-mix abrasive waterjet apparatus comprising the steps of:
s1, adding an abrasive and water into a stirring barrel;
s2, adjusting the three-way ball valve to enable a passage to be formed between the pipeline III and the pipeline II, starting a stirrer to perform internal circulation mixing on the grinding materials and the water added into the stirring barrel, and simultaneously opening a feeding pump, wherein the grinding materials and the water return to the stirring barrel through the pipeline I, the pipeline II and the pipeline III to further perform external circulation mixing;
s3, adjusting the three-way ball valve to enable a passage to be formed between the pipeline IV and the pipeline II, and supplying the abrasive material mixed water obtained by uniform mixing to a feed inlet of a grouting pump by using a feed pump;
s4, opening a grouting pump switch, pressurizing abrasive mixed water at a feed inlet of the grouting pump through the grouting pump, enabling the abrasive mixed water to flow out of a discharge outlet of the grouting pump, and accelerating at a high-pressure-resistant hose and a nozzle; the excessive mixed abrasive water flowing to the feed inlet of the grouting pump and the excessive mixed abrasive water at the discharge outlet of the grouting pump respectively reach a pipeline III through a pipeline five and a pipeline six, and enter a stirring barrel to further uniformly mix the abrasive and the water;
s5, adjusting the frequency of an injection pump according to the working condition to adjust the abrasive jet flow frequency; when the required frequency is more than 80Hz, the motor is started to drive the cutting disc to rotate, and the abrasive pulse water jet frequency is changed by adjusting the rotating speed of the cutting disc and the position of the jet flow passing through the round hole.
Compared with the prior art, the invention provides advanced premixing abrasive water jet equipment and a generation method, and the advanced premixing abrasive water jet equipment has the following beneficial effects:
1. the traditional pre-mixed abrasive water jet utilizes the high-pressure water that divides to mix at the abrasive tank behind the pump, easily appears the uneven problem of abrasive supply. This design utilizes mixing stirring system, mixes before the internal pressurization to abrasive material mixing water in the agitator, mixes more evenly.
2. Because the abrasive tank of mixing abrasive water jet behind the pump utilizes pressure differential to mix before the tradition, very easily mixes the inequality and causes the problem that can't control and mix the husky ratio. Before the grouting pump of the device accelerates water and abrasive materials, the abrasive materials and the water with determined proportion and quality can be added into the stirring barrel to be mixed, and then the sand mixing ratio is controlled.
3. This equipment device is simple, does not need specific abrasive tank, only needs mixing system, grouting pump, nozzle and connect through the pipeline, simultaneously because mix formula abrasive water jet before the tradition mixes in the abrasive tank, and the abrasive tank bears pressure, need closing device when reinforced, opens the abrasive tank and feeds in raw material, so has the problem that can not continuous feed. When the method is used for feeding, only the grinding material and the water are needed to be added into the stirring barrel, so that the continuous feeding is realized.
4. The post-mixed abrasive water jet is mixed and accelerated at the nozzle, so that the acceleration time is short; the front mixed abrasive water jet is mixed in an abrasive tank behind the pump, and the equipment mixes the abrasive in advance before the grouting pump, so that the acceleration time is long.
5. The equipment combines a mature reciprocating plunger type grouting pump with a water jet technology, and generates a pulse type water jet by utilizing the reciprocating motion of a plunger, wherein the frequency of the pulse type water jet is 60-80 Hz; and a cutting disc is arranged at the nozzle and used for adjusting the pulse water jet with higher frequency, and different pulse frequencies are adjusted according to different working conditions.
6. In the embodiment of the invention, part of the abrasive mixed liquid enters the guide vane from the guide flow channel and is discharged from the internal circulation pipe, and part of the abrasive is discharged from the guide flow channel through the circulation hole, so that the internal circulation effect is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an advanced pre-mixed abrasive water jet apparatus;
FIG. 2 is a schematic structural diagram of a truncated pulse jet generating device in an advanced pre-mixed abrasive water jet apparatus;
FIG. 3 is a schematic structural diagram of a cutoff disk in an advanced premixed abrasive water jet apparatus;
FIG. 4 is a schematic diagram of the structure of an agitator in an advanced pre-mixed abrasive water jet apparatus;
FIG. 5 is a schematic structural diagram of a guide head in an advanced premixed abrasive water jet device;
in the figure: 1-a stirring barrel; 2-a stirring motor; 3-a stirrer; 4, a first pipeline; 5-a feed pump; 6-pipeline two; 7-a three-way ball valve; 8-pipeline three; 9-pipeline four; 10-grouting pump; 11-pipeline five; 12-pipeline six; 13-a high-pressure hose; 14-a nozzle; 15-a motor; 16-a rotation axis; 17-cutting off the disc; 18-cutting the circular hole; 19-a feeding hole of a grouting pump; 20-a discharge hole of a grouting pump; 31-inner rotating shaft; 32-an outer fixed cylinder; 33-internal circulation pipe; 34-a first helical leaf; 35-second helical leaf; 36-a lift cylinder; 37-guide vanes; 38-a guide head; 39-circulation holes; 381-connecting ring; 382-a connecting rod; 383-guide blades; 384-a connecting socket.
Detailed Description
Referring to fig. 1 to 5, the present invention provides an advanced pre-mixing abrasive water jet apparatus, including: a mixing tank 1, a mixer 3, a feed pump 5, a grouting pump 10 and a nozzle 14;
wherein, a stirrer 3 capable of circularly stirring the inside of the stirring barrel 1 is arranged in the stirring barrel;
the bottom of the stirring barrel 1 is communicated with the input end of the feeding pump 5 by a first pipeline 4;
the output end of the feeding pump 5 is communicated with the liquid inlet end of a three-way ball valve 7 by adopting a second pipeline 6;
one liquid outlet end of the three-way ball valve 7 is communicated with the stirring barrel 1 by a pipeline three 8, and the other liquid outlet end of the three-way ball valve is communicated with a grouting pump feed inlet 19 of a grouting pump 10 by a pipeline four 9;
the discharge port of the grouting pump 10 is communicated with the nozzle 14 through the high-pressure hose 13, and the high-pressure hose 13 is arranged, so that the operation in different directions and at different angles is facilitated; and simultaneously, the tail end of the high-pressure hose is provided with a nozzle, and high-pressure abrasive water is further accelerated at the nozzle.
In this embodiment, the grouting pump 10 is a plunger-type grouting pump, the highest pressure of the grouting pump is 40MPa, the high-pressure oil generated by the oil pump pushes a piston in the oil pump to reciprocate, and the piston also reciprocates at the same time to suck and discharge slurry from the mixed abrasive water; meanwhile, due to the reciprocating motion of a piston in the grouting pump, pulse abrasive water jet can be generated at a nozzle; the pulse frequency of the pulse abrasive water jet can be further adjusted by adjusting the reciprocating frequency of the piston of the grouting pump, and the frequency adjusting range is 60-80 Hz.
In this embodiment, as shown in fig. 2, a cut-off type pulse jet flow generating device is further disposed at an outlet of the nozzle 14, and the cut-off type pulse jet flow generating device mainly includes a motor 15, a rotating shaft 16, and a cut-off disk 17;
the cutting disc 17 is provided with holes, the cutting disc 17 is coaxially and fixedly connected with the rotating shaft 16, and the rotating shaft 16 is driven by the motor 15.
In addition, as shown in fig. 3, the outermost circle of the cutoff disc 17 is provided with 24 circular holes distributed in a circumferential array, the middle circle is provided with 12 circular holes distributed in a circumferential array, the inner circle is provided with 6 circular holes distributed in a circumferential array, and when the jet flow ejected from the nozzle 14 passes through the circular holes, the jet flow passes through the circular holes; the jet is intercepted without passing through the circular orifice, thereby forming a pulsed abrasive water jet, so that the abrasive pulsed water jet frequency can be further varied by adjusting the rotation speed of the intercepting disc and the position of the jet passing through the circular orifice.
In this embodiment, the feed port 19 of the grouting pump is also communicated with the third pipeline 8 by adopting a fifth pipeline 11;
grouting pump discharge gate 20 still adopt six 12 on the pipeline with five 11 on the pipeline are linked together, because the flow of feedpump is greater than grouting pump and nozzle diameter and is less than the discharge gate diameter, flow to grouting pump feed inlet department excessive mixed abrasive water and grouting pump discharge gate department excessive mixed abrasive water respectively through five pipelines and six arrival pipelines three on the pipeline, get into the agitator in, further with abrasive material and water misce bene.
In this embodiment, as shown in fig. 4, the stirrer 3 includes:
the inner rotating shaft 31 is rotatably arranged in the stirring barrel 1 and is driven to rotate by the external stirring motor 2, and a first spiral blade 34, a second spiral blade 35 and a guide vane 37 are coaxially and sequentially fixed at the bottom of the inner rotating shaft 31 from top to bottom;
the outer fixed cylinder 32 is fixed in the stirring barrel 1 and sleeved outside the inner rotating shaft 31, and the outer fixed cylinder 32 is matched with the second spiral blade 35 to suck the abrasive mixed water;
a lifting cylinder 36 fixed inside the outer fixed cylinder 32 and used for matching with the first spiral blade 24 so as to realize the suction of the mixed liquid; and
the internal circulation pipe 33 is configured in a plurality of circumferential arrays, and each of the internal circulation pipes 33 is communicated with the external fixed cylinder 32.
In a preferred embodiment, the outer diameter of the second helical blade 35 is larger than the outer diameter of the first helical blade 24.
In this embodiment, the liquid outlet end of the internal circulation pipe 33 extends and distributes along the radial direction of the external fixed cylinder 32, so as to realize the internal circulation of the abrasive mixed water in the process of mixing the abrasives and the materials, and the abrasives and the water are returned to the stirring barrel 1 through the first pipe 4, the second pipe 6 and the third pipe 8 by using the feeding pump 5, so as to realize the external circulation, and the internal circulation and the external circulation are matched to achieve a better mixing effect.
In this embodiment, as shown in fig. 5, the bottom of the outer fixed cylinder 32 is connected with a guide head 38 sleeved outside the guide vane 37;
the guide head 38 comprises a connecting ring 381, guide blades 383 and a connecting seat 384;
the two connecting rings 381 are arranged in an up-down symmetrical manner, the two connecting rings 381 are connected by a plurality of connecting rods 382, guide blades 383 are arranged between every two adjacent connecting rods, and a flow guide channel can be formed between every two adjacent guide blades 383;
the connecting ring 381 on the upper portion is connected with the outer fixed cylinder 32 through a connecting seat 384, a circulation hole 39 is formed in the connecting seat 384, when the abrasive material mixing device is used, part of abrasive material mixing liquid enters the guide vanes 37 from the guide flow channel and is discharged from the inner circulation pipe, and part of abrasive material is discharged from the guide flow channel through the circulation hole, so that the inner circulation effect is improved.
A method of generating a pre-mix abrasive waterjet apparatus comprising the steps of:
s1, adding an abrasive and water into a stirring barrel 1;
s2, adjusting the three-way ball valve 7 to enable a passage to be formed between the third pipeline 8 and the second pipeline 6; starting the stirrer 3, and internally circulating and mixing the grinding material and the water added into the stirring barrel 1; simultaneously, the feeding pump 5 is started, and at the moment, the grinding materials and the water return to the stirring barrel 1 through the first pipeline 4, the second pipeline 6 and the third pipeline 8 for further external circulation mixing;
s3, adjusting the three-way ball valve 7 to enable a passage to be formed between the pipeline IV 9 and the pipeline II 6, and supplying the abrasive mixed water obtained by uniform mixing to a feeding hole 19 of a grouting pump by using the feeding pump 5;
s4, opening a switch of the grouting pump 10, pressurizing abrasive mixed water at a feed inlet 19 of the grouting pump by the grouting pump 10, flowing out of a discharge outlet 20 of the grouting pump, and accelerating at a high-pressure-resistant hose 13 and a nozzle 14; wherein, the excessive mixed abrasive water flowing to the feed port 19 of the grouting pump and the excessive mixed abrasive water flowing to the discharge port 20 of the grouting pump reach the third pipeline 8 through the fifth pipeline 11 and the sixth pipeline 12 respectively, enter the stirring barrel 1 and further uniformly mix the abrasive and the water;
s5, adjusting the frequency of the grouting pump 10 according to the working condition to adjust the abrasive jet flow frequency; when the required frequency is more than 80Hz, the motor 15 is started to drive the cut-off disc 17 to rotate, and the abrasive pulse water jet frequency is changed by adjusting the rotating speed of the cut-off disc and the position of the jet flow passing through the circular hole.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. An advanced pre-mixed abrasive water jet apparatus, characterized by: comprises a mixing barrel (1), a mixer (3), a feeding pump (5), a grouting pump (10) and a nozzle (14);
wherein, a stirrer (3) capable of circularly stirring the inside of the stirring barrel (1) is arranged in the stirring barrel;
the bottom of the stirring barrel (1) is communicated with the input end of the feeding pump (5) by adopting a first pipeline (4);
the output end of the feeding pump (5) is communicated with the liquid inlet end of the three-way ball valve (7) by adopting a second pipeline (6);
one liquid outlet end of the three-way ball valve (7) is communicated with the stirring barrel (1) by adopting a pipeline III (8), and the other liquid outlet end of the three-way ball valve is communicated with a slurry injection pump feed inlet (19) of a slurry injection pump (10) by adopting a pipeline IV (9);
the discharge hole of the grouting pump (10) is communicated with a nozzle (14) by a high-pressure hose (13).
2. The advanced pre-mixed abrasive waterjet apparatus of claim 1, wherein: the grouting pump (10) is a plunger type grouting pump, and the highest pressure of the grouting pump is 40 MPa.
3. An advanced pre-mixed abrasive waterjet apparatus as claimed in claim 1 or 2 wherein: the outlet of the nozzle (14) is also provided with a cut-off type pulse jet flow generating device which mainly comprises a motor (15), a rotating shaft (16) and a cut-off disc (17);
holes are distributed on the cut-off disc (17), the cut-off disc (17) is coaxially and fixedly connected with the rotating shaft (16), and the rotating shaft (16) is driven by the motor (15).
4. An advanced premixed abrasive waterjet apparatus according to claim 3, characterized in that: the outermost circle of the cutoff disc (17) is provided with 24 circular holes distributed in a circumferential array manner, the middle circle is provided with 12 circular holes distributed in a circumferential array manner, the inner circle is provided with 6 circular holes distributed in a circumferential array manner, and when jet flow sprayed by the nozzle (14) passes through the circular holes, the jet flow passes through the circular holes; without passing through the circular orifice, the jet is intercepted, forming a pulsed abrasive water jet.
5. The advanced premixed abrasive waterjet apparatus of claim 4, wherein: the feed inlet (19) of the grouting pump is also communicated with the pipeline III (8) by adopting a pipeline V (11);
the grouting pump discharge port (20) is communicated with the pipeline five (11) through a pipeline six (12).
6. The advanced pre-mixed abrasive waterjet apparatus of claim 1, wherein: the agitator (3) comprises:
the inner rotating shaft (31) is rotatably arranged in the stirring barrel (1) and is driven to rotate by an external stirring motor (2), and a first spiral blade (34), a second spiral blade (35) and a guide vane (37) are coaxially and sequentially fixed at the bottom of the inner rotating shaft (31) from top to bottom;
the outer fixed cylinder (32) is fixed in the stirring barrel (1) and sleeved outside the inner rotating shaft (31), and the outer fixed cylinder (32) is matched with the second spiral blade (35) to suck the abrasive mixed water;
a lifting cylinder (36) fixed inside the outer fixed cylinder (32) and used for matching with the first spiral blade (34) so as to realize the suction of the mixed liquid; and
and the internal circulation pipes (33) are arranged in a plurality of circumferential arrays, and each internal circulation pipe (33) is communicated with the external fixed cylinder (32).
7. The advanced pre-mixed abrasive waterjet apparatus of claim 6, wherein: the outer diameter of the second helical blade (35) is greater than the outer diameter of the first helical blade (34).
8. The advanced pre-mixed abrasive waterjet apparatus of claim 6, wherein: the liquid outlet end of the inner circulating pipe (33) extends outwards along the radial direction of the outer fixed cylinder (32).
9. The advanced pre-mixed abrasive waterjet apparatus of claim 6, wherein: the bottom of the outer fixed cylinder (32) is connected with a guide head (38) sleeved outside the guide vane (37);
the guide head (38) comprises a connecting ring (381), guide blades (383) and a connecting seat (384);
the connecting rings (381) are arranged symmetrically up and down, the two connecting rings (381) are connected through a plurality of connecting rods (382), guide blades (383) are distributed between every two adjacent connecting rods, and a flow guide channel can be formed between every two adjacent guide blades (383);
the connecting ring (381) positioned on the upper portion is connected with the outer fixed barrel (32) through a connecting seat (384), and a circulating hole (39) is formed in the connecting seat (384).
10. A method of generating an advanced pre-mixed abrasive water jet apparatus using an advanced pre-mixed abrasive water jet apparatus according to any one of claims 1 to 9, characterized in that: which comprises the following steps:
s1, adding an abrasive and water into a stirring barrel (1);
s2, adjusting the three-way ball valve (7) to enable a passage to be formed between the third pipeline (8) and the second pipeline (6); starting the stirrer (3) to perform internal circulation mixing on the grinding material and the water added into the stirring barrel (1); simultaneously, a feeding pump (5) is opened, and the grinding materials and the water return to the stirring barrel (1) through a first pipeline (4), a second pipeline (6) and a third pipeline (8) at the moment, and are further subjected to external circulation mixing;
s3, adjusting the three-way ball valve (7) to enable a passage to be formed between the pipeline IV (9) and the pipeline II (6), and supplying the abrasive material mixed water obtained by uniformly mixing to a feed port (19) of a grouting pump by using a feed pump (5);
s4, opening a switch of a grouting pump (10), pressurizing abrasive mixed water at a feed inlet (19) of the grouting pump by the grouting pump (10), flowing out of a discharge outlet (20) of the grouting pump, and accelerating at a high-pressure-resistant hose (13) and a nozzle (14); the excessive mixed abrasive water flowing to the feeding hole (19) of the grouting pump and the excessive mixed abrasive water flowing to the discharging hole (20) of the grouting pump reach a pipeline III (8) through a pipeline V (11) and a pipeline VI (12) respectively and enter a stirring barrel (1) to further uniformly mix the abrasive and the water;
s5, adjusting the frequency of an injection pump (10) according to working conditions to adjust the abrasive jet flow frequency; when the required frequency is more than 80Hz, the motor (15) is turned on to drive the cut-off disc (17) to rotate, and the abrasive pulse water jet frequency is changed by adjusting the rotating speed of the cut-off disc and the position of the jet flow passing through the circular hole.
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