CN114033412A - High-pressure water jet mixed abrasive injection device - Google Patents

High-pressure water jet mixed abrasive injection device Download PDF

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Publication number
CN114033412A
CN114033412A CN202111318218.8A CN202111318218A CN114033412A CN 114033412 A CN114033412 A CN 114033412A CN 202111318218 A CN202111318218 A CN 202111318218A CN 114033412 A CN114033412 A CN 114033412A
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CN
China
Prior art keywords
abrasive
pressure water
water jet
throat
section
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Pending
Application number
CN202111318218.8A
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Chinese (zh)
Inventor
杨兴亚
商秋月
刘宏鹏
原晓伟
齐志冲
武胜圈
卢超强
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China Railway Engineering Equipment Group Co Ltd CREG
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China Railway Engineering Equipment Group Co Ltd CREG
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Priority to CN202111318218.8A priority Critical patent/CN114033412A/en
Publication of CN114033412A publication Critical patent/CN114033412A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/1066—Making by using boring or cutting machines with fluid jets
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
    • E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms

Abstract

The invention provides a high-pressure water jet mixed abrasive jetting device, which relates to the technical field of high-pressure water agent abrasive mixed jetting rock breaking and comprises a jet head body, wherein the jet head body is provided with a jet flow channel which is communicated along the axial direction, the jet flow channel comprises an inlet section, a contraction section and a diffusion section which are sequentially arranged, the inner diameter of the contraction section is smaller than that of the inlet section and that of the diffusion section respectively, an abrasive input channel and a fragment suction channel are further formed in the jet head body respectively, one end of the abrasive input channel is opened on the side wall of the jet head body, the other end of the abrasive input channel is communicated with the contraction section, one end of the fragment suction channel is opened on the side wall of the jet head body, and the other end of the fragment suction channel is communicated with the contraction section. The high-pressure water jet mixed abrasive jetting device provided by the invention can be used for secondary utilization or recycling of chip particles, old abrasives and the like, and resources are saved.

Description

High-pressure water jet mixed abrasive injection device
Technical Field
The invention relates to the technical field of rock breaking by mixed injection of high-pressure aqueous agent abrasives, in particular to a high-pressure water jet mixed abrasive injection device.
Background
The Tunnel Boring Machine (TBM) performs parallel continuous operation of tunneling, supporting, slag tapping and other construction processes, is factory assembly line tunnel construction equipment integrating systems of machine, electricity, liquid, light, gas and the like, and has the advantages of high tunneling speed, environmental friendliness, high comprehensive benefit and the like. The existing tunnel boring machine generally adopts a technical scheme of combining high-pressure water jet and mechanical force to break rock.
The high-pressure water jet is a high-speed water flow which takes water as a medium, obtains huge energy through the increase of high-pressure generating equipment, and is sprayed out through a nozzle with a certain shape and concentrated in energy. In order to increase the rock breaking capacity of the high-pressure water jet, an abrasive needs to be added into the original pure water jet to form an abrasive jet. The existing abrasive mixing and jetting device generally utilizes a venturi principle to suck the abrasive, mix the abrasive with high-pressure jet flow, and then jet the mixture out to crush and cut the rock. However, the mixed abrasive jet is also destructive to the internal structure of the nozzle, which seriously affects the service life of the jetting device.
In view of the above, the inventor designs a high-pressure water jet mixed abrasive injection device through repeated experiments according to production design experiences in the field and related fields for many years, so as to solve the problems in the prior art.
Disclosure of Invention
The invention provides a high-pressure water jet mixed abrasive jetting device which can carry out secondary utilization or recycling on chip particles, old abrasives and the like, and saves resources.
In order to achieve the above purpose, the present invention provides a high-pressure water jet mixed abrasive blasting device, wherein the high-pressure water jet mixed abrasive blasting device includes a blasting head body, the blasting head body has a jet passage that penetrates along an axial direction, the jet passage includes an inlet section, a contraction section and a diffusion section that are sequentially arranged, an inner diameter of the contraction section is smaller than an inner diameter of the inlet section and an inner diameter of the diffusion section, the blasting head body is further provided with an abrasive input passage and a debris suction passage, one end of the abrasive input passage is opened at a side wall of the blasting head body, the other end of the abrasive input passage is communicated with the contraction section, one end of the debris suction passage is opened at the side wall of the blasting head body, and the other end of the debris suction passage is communicated with the contraction section.
The high-pressure water jet mixed abrasive injection device comprises a contraction section, a high-pressure water jet mixed abrasive injection channel, a high-pressure mixed abrasive injection channel, and a high-pressure mixed abrasive injection channel, and a high-pressure mixed abrasive injection channel, and a high-pressure channel, and a high-pressure channel, and a high.
The high-pressure water jet mixed abrasive injection device comprises a wear-resistant pipe fitting, an inlet section and a diffusion section, wherein the wear-resistant pipe fitting comprises an accelerating throat and a mixing throat, the accelerating throat is communicated with the inlet section, and the mixing throat is communicated with the diffusion section.
The mixed abrasive injection apparatus of high pressure water jet, wherein, the entry with be formed with first spacing step between the contraction section, install accelerating joint in the entry with dismantling, accelerating joint is the column, accelerating joint's outer wall with the inner wall sealing fit of entry just accelerating joint's one end top is supported on first spacing step, accelerating joint still has the edge the acceleration chamber that the axial of efflux passageway link up.
The high-pressure water jet mixed abrasive injection device comprises a mixing throat, an accelerating throat and a high-pressure water jet mixed abrasive injection device, wherein the mixing throat is provided with a first connecting port on the side wall, and the accelerating throat is provided with a second connecting port on the side wall.
The high-pressure water jet mixed abrasive injection device comprises a mixing throat pipe, wherein the mixing throat pipe is provided with a first connecting port and a second connecting port, and the first connecting port and the second connecting port are respectively arranged on the side wall of the mixing throat pipe.
The high-pressure water jet mixed abrasive injection device comprises an acceleration throat pipe, wherein the acceleration throat pipe is provided with a first connecting port and a second connecting port, and the first connecting port and the second connecting port are respectively arranged on the side wall of the acceleration throat pipe.
The high-pressure water jet mixed abrasive injection device comprises a diffusion section, wherein a compression screw cap is detachably mounted in the diffusion section, an injection cavity which is axially communicated with the jet flow channel is formed in the compression screw cap, and the inner diameter phi of the injection cavity4Greater than the internal diameter phi of the mixing throat3。
The high-pressure water jet mixed abrasive spraying device is characterized in that a filter screw cap is detachably mounted in the debris suction channel, and a plurality of through holes formed along the axial direction of the debris suction channel are uniformly distributed in the filter screw cap.
The high-pressure water jet mixed abrasive injection device further comprises an abrasive input joint, wherein one end of the abrasive input joint is detachably connected with the abrasive input channel, and the other end of the abrasive input joint is connected with the sand conveying pipeline.
The high-pressure water jet mixed abrasive injection device further comprises a high-pressure water input joint, wherein one end of the high-pressure water input joint is detachably connected with the injection head body, and the other end of the high-pressure water input joint is connected with the high-pressure water pipe.
The high-pressure water jet mixed abrasive injection device provided by the invention has the following characteristics and advantages:
the high-pressure water jet mixed abrasive injection device provided by the invention utilizes the fragment suction channel to self-suck and transmit the fragment particles and the old abrasive generated in the rock breaking process into the contraction section, so that the secondary utilization or the cyclic utilization of the fragment particles, the old abrasive and the like is realized, the rock breaking effect is improved, and the resources are also saved.
The high-pressure water jet mixed abrasive injection device provided by the invention reduces the requirements of a high-pressure water mixed abrasive jet technology on abrasive cleanliness, uniformity and the like, almost all hard particles can be sucked or pressed into a jet flow channel as abrasive to be mixed with high-speed water jet, and then are injected to crush, cut rock and other brittle materials, so that the purchase cost of the abrasive is reduced.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.
Fig. 1 is a schematic structural diagram of an embodiment of a high-pressure water jet mixed abrasive injection device according to the present invention;
FIG. 2 is a schematic structural view of another embodiment of the high-pressure water jet mixed abrasive blasting device according to the present invention;
FIG. 3 is a schematic structural view of a sprinkler body according to the present invention;
FIG. 4 is a schematic view of the filter cap according to the present invention;
FIG. 5 is a schematic view of the construction of the abrasive input joint of the present invention;
fig. 6 is a schematic structural view of a high pressure water input joint according to the present invention.
Description of reference numerals:
100. a high-pressure water jet mixed abrasive injection device; 10. A spray head body;
11. a fluidic channel; 111. An inlet section;
112. a contraction section; 113. A diffuser section;
12. an abrasive input channel; 13. A debris suction passage;
20. a wear resistant pipe fitting; 201. A first connection port;
202. a second connection port; 21. An accelerating throat;
22. a mixing throat; 30. An acceleration section;
31. an acceleration chamber; 40. Pressing the screw cap;
41. an ejection chamber; 50. An abrasive input joint;
51. locking the nut; 60. A filtering screw cap;
61. a through hole; 70. A high-pressure water input joint;
200. a high pressure water line; 300. A sand conveying pipeline.
Detailed Description
The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may be present.
Referring to fig. 1 to 6, a high-pressure water jet mixed abrasive blasting device 100 according to the present invention includes a blasting head body 10, the blasting head body 10 has a jet passage 11 that penetrates along an axial direction, the jet passage 11 includes an inlet section 111, a contraction section 112, and a diffusion section 113 that are sequentially disposed, an inner diameter of the contraction section 112 is smaller than an inner diameter of the inlet section 111 and an inner diameter of the diffusion section 113, an abrasive input passage 12 and a debris suction passage 13 are further disposed in the blasting head body 10, one end of the abrasive input passage 12 is open to a sidewall of the blasting head body 10, the other end of the abrasive input passage 12 is communicated with the contraction section 112, one end of the debris suction passage 13 is open to the sidewall of the blasting head body 10, and the other end of the debris suction passage 13 is communicated with the contraction section 112.
According to the high-pressure water jet mixed abrasive injection device 100 provided by the invention, high-pressure water flow conveyed by a high-pressure water pipeline 200 enters the jet flow channel 11 from the inlet section 111 and is then injected from the diffuser section 113, negative pressure is generated in the constriction section 112, a mixture of old abrasives and chips in the abrasive input channel 12 (conveyed by the sand conveying pipeline 300) and the chip suction channel 13 is simultaneously sucked into the jet flow channel 11, the sucked abrasives and chips are mixed with the high-pressure water jet in the constriction section 112 to form mixed abrasives, and the mixed abrasives are finally injected from the diffuser section 113 to crush and cut rocks.
According to the high-pressure water jet mixed abrasive injection device 100 provided by the invention, the fragment suction channel 13 is utilized to self-suck the fragment particles and the old abrasive generated in the rock breaking process into the contraction section 112, so that the fragment particles, the old abrasive and the like are secondarily utilized or recycled, the rock breaking effect is improved, and the resources are saved.
The high-pressure water jet mixed abrasive injection device 100 provided by the invention reduces the requirements of a high-pressure water mixed abrasive jet technology on abrasive cleanliness, uniformity and the like, almost all hard particles can be sucked or pressed into a jet flow channel as abrasive to be mixed with high-speed water jet, and then are injected to crush and cut brittle materials such as rocks, so that the purchase cost of the abrasive is reduced.
In an alternative embodiment of the present invention, a wear-resistant pipe 20 is detachably installed in the contraction section 112, an outer wall of the wear-resistant pipe 20 is in sealing fit with an inner wall of the contraction section 112, the wear-resistant pipe 20 has a through cavity formed along an axial direction of the jet flow channel 11, a first connection port 201 communicated with the abrasive input channel 13 is formed on a side wall of the wear-resistant pipe 20, and a second connection port 202 communicated with the debris suction channel 13 is further formed on the side wall of the wear-resistant pipe 20. The wear-resistant pipe fitting 20 is installed on the contraction section 112, the high-pressure jet, the abrasive and the fragments are mixed in the through cavity of the wear-resistant pipe fitting 20, damage of direct impact, rolling, extrusion, friction and the like of the abrasive and the fragments on the inner wall of the contraction section 112 is avoided, the wear-resistant pipe fitting 20 is replaced after the high-pressure water jet mixed abrasive injection device 100 is used for a period of time, and the service life of the high-pressure water jet mixed abrasive injection device 100 is prolonged.
In an alternative example of this embodiment, the wear resistant tube 20 comprises an acceleration throat 21 and a mixing throat 22, the acceleration throat 21 communicating with the inlet section 111, the mixing throat 22 communicating with the diffuser section 113, and the acceleration throat 21 having an inner diameter Φ2Inner diameter phi less than or equal to that of the mixing throat 223. Internal diameter phi of the mixing throat 223The inner diameter of the throat pipe 21 is larger than the inner diameter of the acceleration throat pipe 21, so that high-pressure water flow conveyed by the acceleration throat pipe 21 can be dispersed, the abrasion degree of the high-pressure water flow to the pipe wall is effectively relieved, and the service life is prolonged.
In an alternative example, a first limit step is formed between the inlet section 111 and the contraction section 112, the acceleration joint 30 is detachably mounted in the inlet section 111, the acceleration joint 30 is in a cylindrical shape, the outer wall of the acceleration joint 30 is in sealing fit with the inner wall of the inlet section 111, one end of the acceleration joint 30 abuts against the first limit step, the acceleration joint 30 is provided with an acceleration cavity 31 which axially penetrates along the jet flow channel 11, and the inner diameter Φ of the acceleration cavity 31 is1Inner diameter phi of acceleration throat pipe 21 is less than or equal to2The effect of accelerating high-pressure water flow can be achieved.
Furthermore, a groove for placing an O-shaped sealing ring is arranged on the end face of the accelerating joint 30 (a plane matched with the first limiting step) and used for placing the O-shaped sealing ring, and the O-shaped sealing ring can block up and down air flow to play a sealing role.
Due to the inner diameter phi of the acceleration joint 301Inner diameter phi of the accelerating throat 212And the inner diameter phi of the mixing throat 223The high-pressure water flow transmitted from the inlet section 111 can be gradually dispersed, the abrasion degree of the high-pressure water flow to the pipe wall is relieved, and the service life of the wear-resistant pipe 20 (the accelerating throat 21 and the mixing throat 22) is prolongedIts life is long.
In the present embodiment, the inner diameter Φ of the acceleration chamber 311Inner diameter phi of acceleration throat pipe 21 is less than or equal to2Inner diameter phi less than or equal to that of the mixing throat 223High pressure water stream P generated by the high pressure water generator0To the jet passage 11 of the spray head body 10; the high-pressure water P is then fed through the acceleration joint 300Converted into high-speed jet water V, and the acceleration joint has 30 inner diameters phi due to Venturi effect1Generates a low or negative pressure P at the inner wall2(ii) a There will be a low or negative pressure P at the abrasive feed channel 123With abrasive delivery pressure P1Combined pressure (P)3′+P1') through the abrasive input channel 12, it is possible to very efficiently both suck and press in the dedicated abrasive, whether it is dry or a mixture of abrasive and liquid, and to smoothly feed it into the wear-resistant tube 20 (acceleration throat 21 or mixing throat 22).
At the same time, when the high-speed jet flows through the accelerating throat 21 and the mixing throat 22, a low pressure (or negative pressure) P is generated at the debris suction passage 133，P3Less than P0、P1Atmospheric pressure; low or negative pressure P3The mixed liquid or abrasive generated in the rock breaking process is automatically sucked through the debris suction channel 13 and mixed with the special abrasive which is conveyed by the abrasive input pipeline 12 and is jetted together through the diffusion section 113 again to break the rock, wherein the special abrasive is injected into the acceleration throat 21 or the mixing throat 22 at a high speed.
In an alternative example, the mixing throat 22 has a first connection port 201 formed on a side wall thereof, and the accelerating throat 21 has a second connection port 202 formed on a side wall thereof. The debris suction channel 13 is communicated with the accelerating throat 21 through the second connecting port 202 and naturally sucks the debris and old abrasive mixed liquid through negative pressure, and the abrasive input channel 12 is connected with the mixing throat 22 through the first connecting port 201 and is pressed into the abrasive mixed liquid through the P1. Due to the inner diameter phi of the mixing throat 223Greater than the inner diameter phi of the accelerating throat 212Same P0Under the condition of jet flow, negative pressures with different degrees are formed in the mixing throat 22 and the accelerating throat 21, and tests show that the mixed liquid of the grinding material naturally sucked through the debris suction channel 13 is less, the speed is slow, and the accelerated throat is provided with a small amount of negative pressureThe wear amount of the tube 21 is small; the abrasive input channel 12 has large pressing-in amount and high speed of the abrasive, and has large abrasion amount to the mixing throat 22; the service lives of the accelerating throat pipe and the mixing throat pipe are different, so that the accelerating throat pipe 23 and the mixing throat pipe 22 are separately arranged, different service lives can be designed conveniently, or the mixing throat pipe 22 can be replaced conveniently under the high-abrasion working condition, and the manufacturing and maintenance cost is reduced.
In another alternative example, the mixing throat 22 has a first connection port 201 and a second connection port 202 respectively formed on two opposite side walls thereof, that is, the inner cavity of the mixing throat 22 is also used as a non-closed mixing cavity for high-pressure water flow, abrasive and debris while guiding the high-pressure water flow.
In yet another alternative example, the two opposite side walls of the accelerating throat 21 are respectively provided with a first connection port 201 and a second connection port 202, that is, the inner cavity of the mixing throat 22 is also used as a non-closed mixing cavity for high-pressure water flow, abrasive and debris while guiding the high-pressure water flow.
In the present invention, the accelerator 30 and the mixing throat 22 may be installed or not according to actual conditions. If the acceleration joint 30 is eliminated, the internal diameter phi of the acceleration throat 21 is adjusted2The high-pressure water flow P is accelerated by the accelerating throat 210Converted into high-speed jet water V and has an inner diameter phi based on Venturi principle2Low pressure or negative pressure is generated at the inner wall; if the mixing throat 22 is eliminated and only the accelerating throat 21 is used, the abrasive or the mixed liquid is in the inner diameter phi of the accelerating throat 212The mixture is mixed with the high-speed water jet and is ejected again through the diffuser 113 to break the rock.
In the present invention, the axis L of the abrasive input channel 122The common axis L with the acceleration joint 30, the acceleration throat 21, the mixing throat 221Having an included angle theta2And 0 < theta2Not more than 90 degrees; at the same time, the axis L of the debris suction passage 133The axis L is common with the accelerating joint 30, the accelerating throat 21 and the mixing throat 221Having an included angle theta3And 0 < theta3The angle is less than or equal to 90 degrees, and in the range, the input grinding material or the mixed liquid has the best mixing effect with the high-speed jet flow V and the best rock breaking effect (deep and wide).
In the present invention, the length of the accelerating throat 21 is H0The mixing throat 22 has a length H1Axis L of abrasive input channel2The axis L is common with the accelerating joint 30, the accelerating throat 21 and the mixing throat 221Point of intersection O2The distance between the matching surface (first limit step) of the nozzle body 10 and the acceleration joint 30 and the axis L1Has a distance H from the intersection O12Experiments show that when H is maintained2﹤(H0+H1) In the relation of (3), H2 has an optimal distance, and the input abrasive or mixed liquid and the high-speed jet V have the best mixing effect and the best rock breaking effect (both deep and wide).
And, the axis L of the debris suction passage 133With the axis L of the acceleration joint 30, the acceleration throat 21, the mixing throat 221Cross point 0 of2From the intersection point O of the mating surface (first limit step) of the spray head body 10 and the acceleration joint 30 and the axis L11Distance H of3When holding H3﹤(H0+H1) In relation to (3), H3There is an optimum distance within which the incoming abrasive or mixed liquor mixes best with the high velocity jet V and the rock breaking effect is best (both deep and wide).
When the high-pressure water jet mixed abrasive injection device 100 provided by the invention is applied to the conditions of weak abrasive wear and convenient maintenance and replacement, one of the accelerating throat 21 and the mixing throat 22 is selected, the abrasive input channel 12 and the debris suction channel 13 are connected with the accelerating throat 21 or the mixing throat 22, and H is kept3﹤H2The relation can be realized, so that the total size of the device is reduced, and the use amount of wear-resistant materials is reduced. And when H3﹤H2In relation (b), the self-suction ability of the debris suction channel 13 is not disturbed by the abrasive input at the abrasive input channel 12, and is stable and independent, i.e. P3﹤P3′+P1′。
In an alternative example of this embodiment, the diffuser section 113 is detachably provided with a pressing screw cap 40, the pressing screw cap 40 is provided with an injection cavity penetrating along the axial direction of the jet flow channel 11, and the inner diameter Φ of the injection cavity 114Greater than the internal diameter phi of the mixing throat 223. The spraying cavity is a spraying channel for mixing the high-pressure water flow and the abrasive,the device is used for spraying the mixed fluid of the high-pressure water flow and the abrasive to the rock to break the rock.
In an alternative example, the outer wall of the pressing screw cap 40 is provided with threads to be matched with the threads on the inner wall of the diffuser 113, so that the pressing screw cap 40 is detachably connected with the spray head body 10, and the pressing screw cap 40 locks and fixes the accelerating throat 21 and the mixing throat 22 in the spray head body 10; and can protect the accelerating throat 21 and the mixing throat 22 from being damaged by rock impact, rolling, extrusion, friction and the like, and prolong the service life of the accelerating throat 21 and the mixing throat 22.
In an alternative example of the present invention, the high-pressure water jet mixed abrasive injection device 100 further includes an abrasive input joint 50, one end of the abrasive input joint 50 is communicated with the abrasive input channel 12, and the other end of the abrasive input joint 50 is connected with the sand conveying pipeline for conveying the abrasive.
In an alternative embodiment, the input adapter 50 is tubular, and the outer wall of one end of the input adapter 50 is externally threaded and is threadably connected to the inner wall of the input channel 12.
Further, the inner wall of the first connection port 201 is also provided with an internal thread for connecting the abrasive input joint 50.
Further, a locking nut 51 is further sleeved outside the abrasive input joint 50, when an included angle between the abrasive channel 12 and the outer side wall of the nozzle body 10 is smaller than 90 °, a right-angled groove with a certain depth is arranged at a position where the abrasive channel 12 is tangent to the outer side wall (outer surface) of the nozzle body 10, and is used for placing the locking nut 51, and the locking nut 51 is in threaded fit with the abrasive input joint 50 and locks the abrasive input joint 50 on the nozzle body 10.
In an alternative embodiment of the present invention, a filter screw cap 60 is detachably installed in the debris suction passage 13, and a plurality of through holes 61 opened along an axial direction of the debris suction passage 13 are uniformly distributed on the filter screw cap 60. The through hole 61 of the filter screw cap 60 is machined to a small diameter by a milling and drilling machine or the like so as to allow an abrasive having a suitable particle diameter to pass therethrough, thereby performing a sieving and filtering function on the chips and the abrasive. The small-diameter through holes 61 on the filter screw cap 60 have certain strength, can bear certain impact, are not easy to deform, and are separated from each other to be not easy to stack and block.
In an alternative example, the filter screw cap 60 is externally threaded on an outer wall thereof, and the filter screw cap 60 is detachably coupled to an inner wall of the debris suction passage 13 through the external thread.
Further, when it is not necessary to use the debris suction passage 13 for self-suction of the abrasive, the filter screw cap 60 may be replaced with a solid screw cap to close the debris suction passage 13.
In an alternative embodiment of the invention, the inner diameter of the debris intake passage 13 is larger than the inner diameter of the abrasive input passage 12.
In an alternative embodiment of the present invention, the high pressure water jet mixed abrasive blasting device 100 further comprises a high pressure water input joint 70, one end of the high pressure water input joint 70 is connected to the inlet section 111, and the other end of the high pressure water input joint 70 is connected to a high pressure water pipe for delivering high pressure water flow, so that the abrasive input joint 50 is detachably connected to the blasting head body 10, and the acceleration joint 30 is locked and fixed in the inlet section 111.
In an alternative embodiment, an O-ring seal is disposed between the high pressure water inlet 70 and the spray head body 10 to provide a seal to prevent water leakage.
The present invention is not limited to the above embodiments, and in particular, various features described in different embodiments can be arbitrarily combined with each other to form other embodiments, and the features are understood to be applicable to any embodiment except the explicitly opposite descriptions, and are not limited to the described embodiments.

Claims (11)

1. The utility model provides a mixed abrasive injection apparatus of high pressure water jet, its characterized in that, mixed abrasive injection apparatus of high pressure water jet includes the shower nozzle body, the shower nozzle body has along the axial through fluidic passage, fluidic passage is including the entry section, contraction section and the diffuser segment that set gradually, the internal diameter of contraction section is less than respectively the internal diameter of entry section with the internal diameter of diffuser segment, abrasive input channel and piece suction channel have still been seted up respectively in the shower nozzle body, the one end opening of abrasive input channel in the lateral wall of shower nozzle body, the other end of abrasive input channel with the contraction section intercommunication, the one end opening of piece suction channel in the lateral wall of shower nozzle body, the other end of piece suction channel with the diffuser segment intercommunication.
2. The high-pressure water jet mixed abrasive blasting device according to claim 1, wherein a wear-resistant pipe fitting is detachably mounted in the contraction section, an outer wall of the wear-resistant pipe fitting is in sealing fit with an inner wall of the contraction section, the wear-resistant pipe fitting is provided with a through cavity formed in the axial direction of the jet passage, a first connecting port communicated with the abrasive input passage is formed in a side wall of the wear-resistant pipe fitting, and a second connecting port communicated with the debris suction passage is further formed in a side wall of the wear-resistant pipe fitting.
3. The high pressure water jet mixed abrasive blasting apparatus of claim 2, wherein the wear resistant pipe comprises an acceleration throat in communication with the inlet section and a mixing throat in communication with the diffuser section.
4. The high-pressure water jet mixing abrasive injection device according to claim 3, wherein a first limit step is formed between the inlet section and the contraction section, an acceleration joint is detachably mounted in the inlet section, the acceleration joint is cylindrical, the outer wall of the acceleration joint is in sealing fit with the inner wall of the inlet section, one end of the acceleration joint abuts against the first limit step, and the acceleration joint further comprises an acceleration cavity which penetrates in the axial direction of the jet flow channel.
5. The high-pressure water jet mixed abrasive blasting device according to claim 3, wherein the first connection port is formed in a side wall of the mixing throat, and the second connection port is formed in a side wall of the accelerating throat.
6. The high-pressure waterjet mixed abrasive blasting device according to claim 3, wherein the first connection port and the second connection port are respectively formed in a side wall of the mixing throat.
7. The high-pressure water jet mixed abrasive blasting device according to claim 3, wherein the first connection port and the second connection port are respectively formed in a side wall of the accelerating throat.
8. The high-pressure water jet mixed abrasive injection device of claim 3, wherein a compression screw cap is detachably mounted in the diffuser section, an injection cavity which is axially communicated with the jet flow channel is formed in the compression screw cap, and the inner diameter phi of the injection cavity4Greater than the internal diameter phi of the mixing throat3。
9. The high-pressure water jet mixed abrasive blasting apparatus according to claim 1, wherein a filter screw cap is detachably attached to the debris suction passage, and a plurality of through holes opened in an axial direction of the debris suction passage are uniformly distributed in the filter screw cap.
10. The high pressure water jet mixed abrasive blasting apparatus of claim 1, further comprising an abrasive input sub, one end of the abrasive input sub being detachably connected to the abrasive input channel, the other end of the abrasive input sub being connected to the sand transport pipe.
11. The high pressure water jet mixed abrasive blasting device of claim 1, further comprising a high pressure water input joint having one end detachably connected to the blasting head body and the other end connected to a high pressure water pipe.
CN202111318218.8A 2021-11-09 2021-11-09 High-pressure water jet mixed abrasive injection device Pending CN114033412A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4648215A (en) * 1982-10-22 1987-03-10 Flow Industries, Inc. Method and apparatus for forming a high velocity liquid abrasive jet
CN1765582A (en) * 2005-09-29 2006-05-03 江苏大学 High-pressure abrasive material and water jet cutting head and blending tube
CN103556947A (en) * 2013-11-15 2014-02-05 重庆大学 Coal mine underground self-suction abrasive jet flow drill bit and drilling method
CN109025825A (en) * 2018-10-10 2018-12-18 东北石油大学 The self-priming particle stream flow drilling rig in underground based on Venturi effect
CN113967547A (en) * 2021-11-09 2022-01-25 中铁工程装备集团有限公司 Injection device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4648215A (en) * 1982-10-22 1987-03-10 Flow Industries, Inc. Method and apparatus for forming a high velocity liquid abrasive jet
CN1765582A (en) * 2005-09-29 2006-05-03 江苏大学 High-pressure abrasive material and water jet cutting head and blending tube
CN103556947A (en) * 2013-11-15 2014-02-05 重庆大学 Coal mine underground self-suction abrasive jet flow drill bit and drilling method
CN109025825A (en) * 2018-10-10 2018-12-18 东北石油大学 The self-priming particle stream flow drilling rig in underground based on Venturi effect
CN113967547A (en) * 2021-11-09 2022-01-25 中铁工程装备集团有限公司 Injection device

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