CN110883698A - Device and method for breaking and stripping concrete aggregate by using fan-shaped abrasive water jet - Google Patents
Device and method for breaking and stripping concrete aggregate by using fan-shaped abrasive water jet Download PDFInfo
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- CN110883698A CN110883698A CN201911216927.8A CN201911216927A CN110883698A CN 110883698 A CN110883698 A CN 110883698A CN 201911216927 A CN201911216927 A CN 201911216927A CN 110883698 A CN110883698 A CN 110883698A
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- nozzle
- stripping
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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
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/003—Removing abrasive powder out of the blasting machine
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention relates to a fan-shaped abrasive water jet breaking and stripping concrete aggregate device which comprises a nozzle group, an abrasive mixer, an abrasive tank, a high-pressure water pump, a water tank, a pipeline connecting the abrasive tank and the high-pressure water pump, and various valves on the pipeline. The nozzle groups at least comprise four nozzle groups, and the nozzle groups are arranged above the working plane through the nozzle bracket to form multi-directional stripping on the concrete blocks on the working plane; one of the fan-shaped jet nozzles is positioned in the center and is a main stripping nozzle, and the two sides of the main stripping nozzle are respectively a first side stripping nozzle and a second side stripping nozzle. The rear cutoff nozzle is positioned outside the main stripping nozzle; the main stripping nozzle, the first side stripping nozzle and the second side stripping nozzle are fan-shaped jet flow hard alloy nozzles, and the rear cutoff nozzle is a cone convergence type hard alloy nozzle; the invention is favorable for the root stripping of concrete aggregate by arranging the multidirectional stripping nozzle, is favorable for improving the stripping efficiency by arranging the fan-shaped jet flow hard alloy nozzle, and also discloses a use method of the system.
Description
Technical Field
The invention relates to the technical field of fluid mechanical equipment, in particular to a device and a method for breaking and stripping concrete aggregate by abrasive water jet.
Background
With the rapid development of the construction engineering technology in China, the number of domestic expressways and railways under construction and built is continuously increased, the construction of high pier stud bridges is more and more, and in the construction process, due to the problems of incompact construction and on-site vibration of workers or concrete materials, the condition that the quality of concrete is not in accordance with the design often occurs, gaps occur between the concrete and reinforcing steel bars, and the phenomenon of hollowing of concrete members is formed. Meanwhile, with the increase of the service life of the built structure, the durability of the concrete structure becomes an important concern of the engineering, and under the dual actions of the natural environment and the service load, the concrete member is continuously required to be maintained and reinforced. At present, when a concrete member has a hollowing phenomenon or needs to be maintained and reinforced, the repairing method generally comprises the steps of chiseling concrete at a position needing to be repaired, removing loose concrete, performing chiseling treatment, and then performing repairing work by using the originally-labeled concrete. But at the in-process of chiseling original concrete, generally use mechanical means to carry out the rock drilling, loose concrete and partly scarcity concrete are clear away together, and can form very big noise and dust, and after chiseling the concrete, still need carry out the secondary and chisel the hair operation, and is inefficient, can not satisfy current actual conditions's demand.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a fan-shaped abrasive water jet demolishing and stripping concrete aggregate device and a method thereof.
The invention is realized by the following technical scheme:
a fan-shaped abrasive water jet breaking and stripping concrete aggregate device comprises a nozzle group, an abrasive mixer, an abrasive tank, a high-pressure water pump, a water tank, a pipeline connecting the nozzle group, the abrasive mixer, the abrasive tank, the high-pressure water pump and the water tank, and various valves arranged on the pipeline. The high-pressure water pump pumps pure water into the grinding material mixer from the water tank, and the grinding material mixer sucks and mixes grinding materials in the grinding material tank and then sends the grinding materials to the nozzle group.
The improvement of the invention lies in that: the nozzle group at least comprises four nozzles which are supported by a nozzle bracket and are arranged above the working plane, wherein at least three fan-shaped jet nozzles and a conical convergent nozzle are arranged, and the multi-directional stripping is formed on the concrete block on the working plane. One of the fan-shaped jet nozzles is positioned in the center and mainly used for peeling off the nozzle, the axis of the nozzle is vertical to the working plane, the other two fan-shaped jet nozzles are respectively positioned on two sides of the main peeling off nozzle and respectively used for peeling off the nozzle on the first side and the nozzle on the second side, and the axes of the nozzles are inclined towards the center and form an included angle relative to the working plane. The cone convergent nozzle is also positioned outside the main stripping nozzle and is a rear cutoff nozzle which is arranged at an included angle relative to the working plane.
The fan-shaped jet nozzle comprises a nozzle straight line section, an elliptical convergence section and a dovetail groove opening from an inlet to an outlet in sequence, the dovetail groove angle of the dovetail groove opening is 45-120 degrees, and jet flow forms cylindrical liquid flow through the nozzle straight line section and the elliptical convergence section to impact the dovetail groove opening of the nozzle outlet to generate deflection to form fan-shaped abrasive jet flow.
The conical convergent hard alloy nozzle comprises a nozzle accelerating section and a linear convergent section from an inlet to an outlet in sequence, and a linear abrasive jet is formed at the outlet, is concentrated relative to the energy of the fan-shaped abrasive jet, has strong erosion capacity, and can effectively remove the bonding matter at the root of the aggregate.
The first side stripping nozzle and the second side stripping nozzle are arranged at an included angle of 55-65 degrees relative to the working plane, and the rear cutoff nozzle is arranged at an included angle of 40-50 degrees relative to the working plane.
As a preferred technical scheme, the abrasive mixer comprises a pure water jet inlet, the outlet direction of the pure water jet inlet is in threaded connection with a mixing cavity seal, the mixing cavity seal is in threaded connection with a throat pipe, the pipe wall of the throat pipe is connected with an abrasive inlet, a mixing diffusion pipe is arranged in the outlet direction of the throat pipe, and the outlet of the mixing diffusion pipe is connected to a nozzle group on a nozzle support through a pipeline.
As a preferable technical scheme of the invention, the abrasive tank is a spherical abrasive tank, and an abrasive stop valve is arranged on an outlet pipeline of the spherical abrasive tank.
As a preferred technical scheme of the invention, a stripping clamping table is arranged below the nozzle support, and a clamping block is arranged on the stripping clamping table in the lateral direction and used for clamping a concrete block to be stripped.
The invention also provides a method for breaking and stripping concrete aggregate by using the device to perform abrasive water jet, which comprises the following steps:
and S1, after the concrete stripping device is installed according to the position shown in the drawing by an operator, fixing the concrete block on the stripping clamping table through the clamping block, and then fixing the multidirectional stripping nozzle bracket above the concrete block.
And S2, opening the high-pressure water pump, opening the abrasive stop valve after pure water jet flow is jetted by the nozzle connected to the multi-directional stripping nozzle support, conveying dry abrasive particles to the positions of the rear cutting nozzle, the main stripping nozzle, the first side stripping nozzle and the second side stripping nozzle through the abrasive mixing cavity, damaging the soft foundation concrete by fan-shaped abrasive jet flow formed in the main stripping nozzle, the first side stripping nozzle and the second side stripping nozzle, stripping the root of the concrete aggregate from the concrete block by convergent abrasive jet flow formed in the rear cutting nozzle, and controlling the stripping clamping table to move three-dimensionally.
And S3, controlling the stripping clamping table to move back and forth while jet stripping, closing the abrasive stop valve after surface concrete is stripped, removing aggregate, soft base concrete and abrasive particles by pure water jet, controlling the stripping clamping table to move up, opening the abrasive stop valve, repeating the above steps to carry out erosion stripping on a new layer of concrete aggregate, and closing the abrasive stop valve (4) and the high-pressure water pump after stripping is finished to collect the stripped concrete aggregate.
Compared with the prior art, the invention has the beneficial effects that: the invention forms multi-directional stripping by arranging the nozzles from multiple directions, which is beneficial to the complete stripping of concrete aggregate; the fan-shaped jet nozzle is beneficial to stripping and damaging the concrete soft foundation bonding material, reducing the abrasion of the nozzle and reducing the damage to the aggregate; the fan-shaped jet nozzle is matched with the cone convergent nozzle, so that the effective separation of the concrete block aggregate and the soft foundation material is facilitated; the mixing and acceleration of the abrasive particles is facilitated by the provision of an abrasive mixing chamber; and the structure is simple, the operation is convenient, and the device is economical and practical.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the abrasive mixing chamber of the present invention;
FIG. 3 is a cross-sectional view of a main stripping nozzle configuration of the present invention;
FIG. 4 is a top plan view of the main stripping nozzle configuration of the present invention;
FIG. 5 is a left side view of the main stripping nozzle configuration of the present invention;
FIG. 6 is a schematic view of the jet structure of the main stripping nozzle of the present invention
FIG. 7 is a schematic view of a rear cutoff nozzle jet structure of the present invention
In the figure: 1. a nozzle holder; 11. cutting off the nozzle; 111. a nozzle acceleration section; 112. a linear convergence section; 113. a linear abrasive jet; 12. peeling the nozzle from the second side; 13. a main stripping nozzle; 131. a straight section of a nozzle; 132. an elliptical convergence section; 133. a dovetail slot; 134. a fan-shaped abrasive jet; 14. peeling the nozzle from the first side; 2. an abrasive mixing chamber; 21. a pure water jet inlet; 22. sealing the mixing cavity; 23. a throat; 24. an abrasive inlet; 25. a hybrid diffusion tube; 3. a spherical abrasive tank; 31. a threaded end cap; 32. drying the abrasive particles; 4. an abrasive shut-off valve; 5. stripping the clamping table; 51. a concrete block; 52. a clamping block; 6. a high pressure water pump; 61. a water tank; 62. an overflow valve; 63. a throttle valve; 64. a pressure gauge; 65. a high pressure hose; 66. a one-way valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the fan-shaped abrasive water jet dismantling and stripping device for concrete aggregate mainly comprises a nozzle group, an abrasive mixer 2, an abrasive tank 3, a high-pressure water pump 6, a water tank 61, a pipeline connecting the nozzle group, the abrasive mixer 2, the abrasive tank 3, the high-pressure water pump 6, various valves arranged on the pipeline and the like.
The nozzle bracket 1 is used for supporting and installing the nozzle group, and the nozzle group is positioned above the stripping clamping table 5. Specifically, as shown in fig. 1, a rear cutoff nozzle 11 is obliquely installed at the rear of the nozzle holder 1, a first side stripping nozzle 14 and a second side stripping nozzle 12 are obliquely installed on the upper side surface of the nozzle holder 1, and a main stripping nozzle 13 is vertically installed on the nozzle holder 1.
In this embodiment, the first side peeling nozzle 14 and the second side peeling nozzle 12 are arranged at an angle of 60 ° with respect to the working plane. The rear cutoff nozzle 11 is arranged at 45 ° relative to the working plane. Of course, the angle can be adjusted according to actual conditions.
The first side stripping nozzle 14, the second side stripping nozzle 12 and the main stripping nozzle 13 are fan-shaped jet flow hard alloy nozzles, which are beneficial to forming jet flow with large damage surface and reducing the abrasion of the nozzles. Taking the main stripping nozzle 13 as an example, referring to fig. 3, 4, 5 and 6, the nozzle is provided with a nozzle straight line section 131, an elliptical convergent section 132 is arranged above the nozzle straight line section 131, a dovetail groove outlet 133 is arranged above the elliptical convergent section 132, the angle of the dovetail groove is 45-120 degrees, the specific angle is determined according to the size, material strength and the like of a concrete block to be stripped, and a fan-shaped abrasive jet 134 is formed at the outlet.
Referring to fig. 7, the rear cutoff nozzle 11 adopted in the present invention is a conical convergent hard alloy nozzle, which comprises a nozzle acceleration section 111 and a linear convergent section 112 in sequence from an inlet to an outlet, and forms a linear abrasive jet 113 at the outlet, wherein the linear abrasive jet 113 is energy-concentrated with respect to the fan-shaped abrasive jet 134, which helps to separate the root of the concrete aggregate from the concrete block 51.
Of course, this embodiment is merely illustrative of the use of a combination of four nozzles. In actual use, more nozzles can be adopted for combination according to the condition of concrete blocks needing to be stripped, the direction can be increased, and the angle can be adjusted.
In this embodiment, the left side of the multi-directional peeling nozzle holder 1 is provided with an abrasive mixer 2, and the abrasive mixer 2 is helpful for mixing the dry abrasive particles 32 with the pure water jet.
The specific structure of the abrasive mixer 2 is shown in fig. 2, and comprises a pure water jet inlet 21, a mixing cavity seal 22, a throat 23, an abrasive inlet 24 and a mixing diffusion pipe 25. The right side of the pure water jet inlet 21 is in threaded connection with a mixing cavity seal 22, the mixing cavity seal 22 is in threaded connection with a throat 23, an abrasive inlet 24 is formed in the pipe wall of the throat 23, a mixing diffusion pipe 25 is arranged on the right side of the throat 23, and the right end of the mixing diffusion pipe 25 is connected with a nozzle group on the nozzle support 1 through a pipeline.
Be equipped with spherical abrasive tank 3 on the abrasive mixer 2, 3 upper ends of spherical abrasive tank are equipped with threaded end cover 31, and the filling has dry abrasive particle 32 in the spherical abrasive tank 3, and the lower extreme of spherical abrasive tank 3 is equipped with abrasive stop valve 4, and abrasive stop valve 4 helps the mixture of dry abrasive particle 32, the upper end and the lower extreme of abrasive stop valve 4 are connected to spherical abrasive tank 3 and abrasive mixer 2 respectively.
A stripping clamping table 5 is arranged below the multidirectional stripping nozzle support 1, a concrete block 51 is clamped on the stripping clamping table 5, a clamping block 52 is arranged on the lateral side of the concrete block 51, and the clamping block 52 is beneficial to clamping and fixing the concrete block 51. The peeling chuck 5 may be disposed on a three-dimensional movement mechanism, and the peeling chuck 5 may be controlled to move three-dimensionally.
The high-pressure water pump 6 is beneficial to generating high-pressure jet flow, the water inlet end of the high-pressure water pump 6 is connected with the water tank 61, the overflow valve 62 is arranged above the water tank 61, the throttle valve 63 is arranged above the overflow valve 62, the upper end of the throttle valve 63 is provided with the pressure gauge 64, and the right side of the throttle valve 63 is provided with the check valve 66 which is connected through the high-pressure hose 65.
When the device is used on site, an operator finishes mounting the concrete stripping device according to the position shown in figure 1, fixes a concrete block 51 on a stripping clamping table 5 through a clamping block 52, then fixes a multidirectional stripping nozzle bracket above the concrete block 51, opens a high-pressure water pump 6, opens an abrasive stop valve 4 after a nozzle connected on the multidirectional stripping nozzle bracket 1 sprays pure water jet, dry abrasive particles 32 are conveyed to a rear cutoff nozzle 11, a main stripping nozzle 13, a first side stripping nozzle 14 and a second side stripping nozzle 12 through an abrasive mixer 2, fan-shaped abrasive jet formed in the main stripping nozzle 13, the first side stripping nozzle 14 and the second side stripping nozzle 12 destroys soft foundation concrete, convergent abrasive jet formed in the rear cutoff nozzle 11 strips the root of concrete aggregate from the concrete block 51, and controls the stripping clamping table 5 to move back and forth while jet stripping, after the surface concrete is stripped, the abrasive stop valve 4 is closed, the aggregate, the soft base concrete and the abrasive particles are removed by pure water jet flow, the stripping clamping table 5 is controlled to move upwards,
and opening the abrasive stop valve 4, and eroding and stripping the new layer of concrete aggregate.
When the grinding materials in the spherical grinding material tank 3 are not much, the threaded end cover 31 is opened, the dry grinding material particles 32 are added again, the continuous process of the grinding material jet flow is kept, after the stripping is finished, the grinding material stop valve 4 and the high-pressure water pump 6 are closed, and the stripped concrete aggregate is collected.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A fan-shaped abrasive water jet dismantling and stripping concrete aggregate device comprises a nozzle group, an abrasive mixer (2), an abrasive tank (3), a high-pressure water pump (6), a water tank (61) and a pipeline connecting the nozzle group, the abrasive mixer and the abrasive tank, and various valves on the pipeline; the high-pressure water pump (6) pumps water from the water tank (61) into the abrasive mixer (2), and the abrasive mixer (2) sucks and mixes the abrasive in the abrasive tank (3) and then sends the mixture to the nozzle group;
the method is characterized in that: the nozzle group at least comprises four nozzles, and is supported and arranged above the working plane by a nozzle bracket (1), wherein at least three fan-shaped jet nozzles and one cone convergent nozzle form multi-directional stripping on a concrete block on the working plane; one fan-shaped jet nozzle is positioned in the center and is a main stripping nozzle (13), the axis of the nozzle is vertical to the working plane, the other two fan-shaped jet nozzles are respectively positioned at two sides of the main stripping nozzle (13) and are respectively a first side stripping nozzle (14) and a second side stripping nozzle (12), the axes of the nozzles are inclined towards the center and form an included angle relative to the working plane; the conical convergent nozzle is also positioned outside the main stripping nozzle (13), is a rear cut-off nozzle (11) and is arranged at an included angle relative to the working plane; the fan-shaped jet nozzle comprises a nozzle straight line section (131), an elliptical convergence section (132) and a dovetail groove opening (133) from an inlet to an outlet in sequence, the dovetail groove angle (133) of the dovetail groove opening is 45-120 degrees, and jet flow forms a fan-shaped abrasive jet flow (134) through the elliptical convergence section (132) and the dovetail groove opening (133); the conical convergent nozzle comprises a nozzle accelerating section (111) and a linear convergent section (112) from an inlet to an outlet in sequence, and a linear abrasive jet (113) is formed at the outlet.
2. The fan-shaped abrasive water jet demolition stripping concrete aggregate device according to claim 1, wherein: the first side stripping nozzle (14) and the second side stripping nozzle (12) are arranged at an included angle of 55-65 degrees relative to the working plane, and the rear cutoff nozzle (11) is arranged at an included angle of 40-50 degrees relative to the working plane.
3. The fan-shaped abrasive water jet demolition stripping concrete aggregate device according to claim 1 or 2, characterized in that: the grinding material mixer (2) comprises a pure water jet inlet (21), a mixing cavity seal (22) is in threaded connection with the outlet direction of the pure water jet inlet (21), a throat pipe (23) is in threaded connection with the mixing cavity seal (22), a grinding material inlet (24) is connected onto the pipe wall of the throat pipe (23), a mixing diffusion pipe (25) is arranged in the outlet direction of the throat pipe (23), and the outlet of the mixing diffusion pipe (25) is connected to a nozzle group on the nozzle support (1) through a pipeline.
4. The fan-shaped abrasive water jet demolition stripping concrete aggregate device according to claim 1 or 2, characterized in that: the abrasive tank (3) is a spherical abrasive tank, and an abrasive stop valve (4) is arranged on an outlet pipeline of the spherical abrasive tank.
5. The fan-shaped abrasive water jet demolition stripping concrete aggregate device according to claim 1 or 2, characterized in that: the concrete stripping device is characterized in that a stripping clamping table (5) is arranged below the nozzle support (1), and a clamping block (52) is arranged on the stripping clamping table (5) in the lateral direction and used for clamping a concrete block (51) to be stripped.
6. Method for abrasive water jet demolition stripping of concrete aggregates by means of a device according to any one of claims 1 to 5, characterized in that it comprises the following steps:
s1, fixing the concrete block (51) on the stripping clamping table (5) through the clamping block (52), and then fixing the nozzle bracket (1) above the concrete block (51);
s2, opening the high-pressure water pump (6), opening the abrasive stop valve (4) after pure water jet flow is jetted out of the nozzle, conveying dry abrasive particles (32) to the positions of the rear cutoff nozzle (11), the main stripping nozzle (13), the first side stripping nozzle (14) and the second side stripping nozzle (12) through the abrasive mixer (2), damaging the soft foundation concrete through fan-shaped abrasive jet flow formed by the main stripping nozzle (13), the first side stripping nozzle (14) and the second side stripping nozzle (12), and stripping the root of the concrete aggregate from the concrete block (51) through convergent abrasive jet flow formed by the rear cutoff nozzle (11);
s3, controlling the stripping clamping table (5) to move back and forth while jet stripping, closing the abrasive stop valve (4) after surface concrete is stripped, removing aggregate, soft-base concrete and abrasive particles by pure water jet, controlling the stripping clamping table (5) to move up, opening the abrasive stop valve (4), repeating the above steps to carry out erosion stripping on a new layer of concrete aggregate, and closing the abrasive stop valve (4) and the high-pressure water pump (6) after stripping is finished to collect the stripped concrete aggregate.
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| CN201911216927.8A CN110883698B (en) | 2019-12-03 | 2019-12-03 | Device and method for breaking and stripping concrete aggregate by using fan-shaped abrasive water jet |
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| CN201911216927.8A CN110883698B (en) | 2019-12-03 | 2019-12-03 | Device and method for breaking and stripping concrete aggregate by using fan-shaped abrasive water jet |
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| CN110883698B CN110883698B (en) | 2021-04-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112647968A (en) * | 2020-12-24 | 2021-04-13 | 招商局重庆交通科研设计院有限公司 | Nondestructive quick water jet flow demolition device for tunnel secondary lining structure |
| CN113997205A (en) * | 2021-11-26 | 2022-02-01 | 山东大学 | High-voltage pulse abrasive jet flow generation device and method |
| CN115464570A (en) * | 2022-08-12 | 2022-12-13 | 武汉大学 | Laser cutting type pulse jet generating device |
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| CN113997205A (en) * | 2021-11-26 | 2022-02-01 | 山东大学 | High-voltage pulse abrasive jet flow generation device and method |
| CN115464570A (en) * | 2022-08-12 | 2022-12-13 | 武汉大学 | Laser cutting type pulse jet generating device |
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| CN110883698B (en) | 2021-04-20 |
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