CN115141917A - Multi-media collaborative water jet surface strengthening spray device and method - Google Patents

Abstract

The invention discloses a multi-medium coordinated water jet surface-strengthening injection device, comprising a high-pressure water inlet pipe, a diverter valve and a multi-media mixing connection valve. The multi-media mixing connection valve is provided with at least two mutually isolated multi-media mixing chambers. One end of the high-pressure water inlet pipe and each multi-media mixing chamber is communicated with the shunt valve, the other end of each multi-media mixing chamber is connected with a jet pipe, and one end of the jet pipe away from the multi-media mixing chamber is provided with a jet nozzle, and each multi-media mixing chamber is provided with a jet nozzle. Each of the medium mixing chambers is communicated with at least two medium inlets, and one end of each medium inlet away from the corresponding multi-media mixing chamber is connected with a feeding pipe. The surface of the workpiece to be strengthened is sprayed by the multi-medium mixed water jet sprayed by the jet nozzle to strengthen the surface of the workpiece to be strengthened. The invention improves the surface strengthening effect while reducing the roughness of the strengthened surface.

Description

Multi-media collaborative water jet surface strengthening spray device and method

technical field

The invention relates to the technical field of water jet surface strengthening, in particular to a multi-medium collaborative water jet surface strengthening spray device and method.

Background technique

Water jet surface enhancement technology has attracted much attention at home and abroad due to its high accessibility in confined spaces, easy operation, low cost, and environmental protection. The existing water jet surface strengthening technologies include pure water jet strengthening, cavitation jet strengthening, pulsed water jet strengthening and abrasive water jet strengthening.

The pure water jet strengthening method is to directly spray high-pressure pure water to the metal surface through a water jet nozzle. The jet medium of this process is water, which can generate beneficial residual compressive stress on the metal surface and improve the surface hardness, but will not make the metal surface. Grain refinement occurs in the surface layer, which will cause serious surface erosion, and the surface roughness after strengthening is high.

The cavitation jet strengthening method is to generate cavitation through the jet nozzle submerged in water. The jet medium of this process is also water, and the energy generated by the collapse of cavitation bubbles in the water body is used to strengthen the metal surface. Induce a large number of deformation twins and dislocations on the metal surface, but it will cause annular erosion on the surface and improve the surface roughness.

The pulsed water jet enhancement method is to convert the continuous jet into a discontinuous fluid cluster with the help of a mechanical modulator or an ultrasonic converter, so as to impact the metal surface with extremely high kinetic energy. The existing jet medium for pulsed water jet enhancement is water or water and solid. The mixture of abrasive particles and the pulsed water jet strengthening method can achieve a larger impact energy at a lower initial jet pressure, which reduces the cost of jet equipment, but also causes serious surface erosion.

Abrasive water jet strengthening is to replace the jet medium with a mixture of water and solid abrasive particles on the basis of pure water jet strengthening to generate greater impact energy. Plastic deformation and grain refinement introduce higher residual compressive stress and microhardness, however the treated metal surface roughness is still higher compared to the untreated surface.

Therefore, improving the surface strengthening effect and reducing the surface roughness is the key problem to be solved in water jet surface strengthening.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a multi-media synergistic water jet surface strengthening spraying device and method to solve the above-mentioned problems in the prior art, improve the surface strengthening effect, and reduce the roughness of the strengthened surface at the same time.

For achieving the above object, the present invention provides the following scheme:

The invention provides a multi-medium coordinated water jet surface-enhancing spray device, comprising a high-pressure water inlet pipe, a diverter valve and a multi-media mixing connection valve, wherein at least two mutually isolated multi-medium mixing valves are arranged in the multi-media mixing connection valve One end of the high-pressure water inlet pipe and each of the multi-media mixing chambers is communicated with the shunt valve, the other end of each of the multi-media mixing chambers is connected with a jet pipe, and the jet pipe is far away from the One end of the multi-media mixing chamber is provided with a jet nozzle, each of the multi-media mixing chambers is connected with at least two medium inlets, and one end of each of the medium inlets away from the corresponding multi-media mixing chamber is connected with a feed material Tube.

Preferably, a high-pressure water inlet is provided at one end of the multi-media mixing chamber that communicates with the diverter valve, a gemstone nozzle is arranged in the high-pressure water inlet, and a high-pressure water overflow port is communicated with the high-pressure water inlet. The opening of one end of the high-pressure water overflow port away from the high-pressure water inlet is located on the outer wall of the multi-media mixing connection valve.

Preferably, the multi-media mixing chamber is further provided with an air pressure detection port, and an air pressure sensor is connected to the air pressure detection port.

Preferably, all the medium inlets and the air pressure detection ports on any one of the multi-media mixing chambers are distributed at intervals along the flow direction of the high-pressure water, and the air pressure detection ports are closer to all the medium inlets than any one of the medium inlets. the diverter valve.

Preferably, each of the multi-medium mixing chambers is provided with two medium inlets, the two medium inlets are an abrasive medium inlet and a polishing lubricating medium inlet respectively, and the abrasive medium inlet is smaller than the polishing medium inlet. The lubricating medium inlet is closer to the diverter valve; each of the feed pipes is provided with a flow regulating valve.

Preferably, the multi-media mixing connection valve is provided with two multi-media mixing chambers, and the diverter valve is a three-way diverter valve; the multi-media mixing chamber is communicated with the diverter valve through a high-pressure diverter pipe.

Preferably, the jet pipe is connected with the multi-medium mixing chamber in a rotational and sealing manner, and an angle adjusting member and an angle dial are fixed on the jet pipe.

Preferably, the 0° scale of the angle dial is aligned with the axis direction of the outlet of the jet nozzle on the jet pipe, and the axis direction of the outlet of the jet nozzle is perpendicular to the axis of the jet pipe; so The angle adjusting member adopts gears; the directions of the two jet nozzles are opposite, and the two angle adjusting members are engaged.

The present invention also provides a multi-medium collaborative water jet surface-enhancing spraying method. Based on the above-mentioned multi-medium collaborative water jet surface-enhancing spraying device, high-pressure water is introduced into each multi-medium mixing chamber through a high-pressure water inlet pipe and a diverter valve, and the Abrasive medium and polishing lubricating medium are introduced into each of the multi-media mixing chambers by different feed pipes, and the high-pressure water, the abrasive medium and the polishing lubricating medium in each of the multi-media mixing chambers are mixed After being together, they are sprayed out through the jet nozzle at the end of the jet pipe; the surface of the workpiece to be strengthened is sprayed with the multi-media mixed water jet sprayed from the jet nozzle to enhance the surface of the workpiece to be strengthened.

The present invention has achieved the following technical effects with respect to the prior art:

The multi-media synergistic water jet surface strengthening spraying device and method of the present invention improves the surface strengthening effect and reduces the roughness of the strengthened surface at the same time. The multi-media coordinated water jet surface strengthening spray device and method of the present invention adopts multi-media coordinated jet, wherein water is used as the carrier of the high-speed jet, abrasive particles are used as the strengthening phase to enhance the impact kinetic energy, and the polishing lubricating medium continuously impacts the metal in the jet beam. The surface plays a role in reducing the surface roughness, which can reduce the surface quality of the strengthened metal on the basis of improving the metal surface strengthening effect, and at the same time improve the processing efficiency and the application scene.

The multi-media synergistic water jet surface strengthening spray device of the present invention can ensure the uniformity of the two-side jet pressure to the greatest extent by arranging the jet nozzles symmetrically with two heads; the distance between the jet nozzles is reduced to the greatest extent to adapt to the surface strengthening of the thin-walled workpiece; the air pressure is used The sensor detects the real-time air pressure state of the multi-media mixing chamber, which is convenient to establish the correlation between air pressure and the strengthening effect; the flow rate of the solid-liquid medium is adjusted by setting the flow control valve; the air pressure detection port in the multi-media mixing chamber of the multi-media mixing connection valve, the solid medium The feeding ports and polishing lubricating medium feeding ports are distributed at intervals along the jet flow direction, which is convenient for multi-media mixing and avoids mutual interference during the inflow of solid-liquid media; On the one hand, it is convenient to calibrate the jet angle, and on the other hand, it improves the application scene of the double-head jetting device, which can be applied to the surface strengthening of the two sides of the thin plate and the inner and outer walls of the rotating workpiece.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structure schematic diagram of the multi-media synergistic water jet surface strengthening spray device of the present invention;

2 is a side view of the multi-media coordinated water jet surface strengthening spray device of the present invention;

Fig. 3 is the front view of the multi-media synergistic water jet surface strengthening spray device of the present invention;

Fig. 4 is the A-A sectional view of Fig. 2;

Fig. 5 is the B-B sectional view of Fig. 3;

6 is a cross-sectional view of the multi-media mixing connection valve in the multi-media synergistic water jet surface enhancement spray device of the present invention;

Fig. 7 is the C-C sectional view of Fig. 3;

8 is a schematic diagram of the application of the multi-media synergistic water jet surface strengthening spray device to a thin plate workpiece according to the present invention;

9 is a schematic diagram of the application of the multi-media synergistic water jet surface strengthening spray device of the present invention to the outer wall of the first rotating workpiece of the thin plate workpiece;

10 is a schematic diagram of the multi-media synergistic water jet surface strengthening spray device of the present invention applied to the inner wall of the first rotating workpiece;

Among them: 1. High-pressure water inlet pipe; 2. First locking nut; 3. Three-way diverter valve; 4. Sealing nut; 5. High-pressure water splitting pipe; 6. Third locking nut; 7. Transition compression joint ;8. Abrasive media feed pipe; 9. Abrasive flow control valve; 10. Right-angle joint; 11. Polished lubricant feed pipe; 12. Liquid flow control valve; 13. Multi-media mixing connection valve; 13-1 , high pressure water inlet; 13-2, high pressure water overflow port; 13-3, air pressure detection port; 13-4, abrasive medium inlet; 13-5, polishing lubricating medium inlet; 13-6, jet pipe connection port; 13-7. Multi-medium mixing chamber; 14. Air pressure sensor; 15. Jet tube pressing assembly; 15-1. Elastic locking sleeve; 15-2. Fourth locking nut; 16. Angle dial; 17. Angle Adjusting part; 18, jet pipe; 19, jet nozzle; 20, gemstone nozzle; 21, thin plate workpiece; 22, first rotating workpiece; 23, second rotating workpiece.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a multi-media synergistic water jet surface strengthening spraying device and method to solve the above-mentioned problems in the prior art, improve the surface strengthening effect, and reduce the roughness of the strengthened surface at the same time.

The invention provides a multi-medium coordinated water jet surface-enhancing spray device, comprising a high-pressure water inlet pipe, a diverter valve and a multi-media mixing connection valve, wherein at least two mutually isolated multi-medium mixing valves are arranged in the multi-media mixing connection valve One end of the high-pressure water inlet pipe and each of the multi-media mixing chambers is communicated with the shunt valve, the other end of each of the multi-media mixing chambers is connected with a jet pipe, and the jet pipe is far away from the One end of the multi-media mixing chamber is provided with a jet nozzle, each of the multi-media mixing chambers is connected with at least two medium inlets, and one end of each of the medium inlets away from the corresponding multi-media mixing chamber is connected with a feed material Tube.

The multi-media synergistic water jet surface strengthening spraying device and method of the present invention improves the surface strengthening effect and reduces the roughness of the strengthened surface at the same time.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 to 10: This embodiment provides a multi-media coordinated water jet surface enhancement spray device, including a high-pressure water inlet pipe 1, a diverter valve 3, and a multi-media mixing connection valve 13. The multi-media mixing connection valve 13 There are two mutually isolated multi-media mixing chambers 13-7, one end of the high-pressure water inlet pipe 1 and each multi-media mixing chamber 13-7 is communicated with the diverter valve 3, and the other side of each multi-media mixing chamber 13-7 is connected. One end is connected with a jet pipe 18, and one end of the jet pipe 18 away from the multi-media mixing chamber 13-7 is provided with a jet nozzle 19, each multi-media mixing chamber 13-7 is connected with two medium inlets, and each medium inlet is far away from the corresponding One end of the multi-media mixing chamber 13-7 is connected with a feeding pipe.

The multi-media mixing chamber 13-7 is communicated with the shunt valve 3 through a high-pressure shunt pipe. A high-pressure water inlet 13-1 is arranged at one end of the multi-medium mixing chamber 13-7 that communicates with the diverter valve 3, a gemstone nozzle 20 is arranged in the high-pressure water inlet 13-1, and a high-pressure water overflow port is communicated with the high-pressure water inlet 13-1. 13-2, the opening at one end of the high-pressure water overflow port 13-2 away from the high-pressure water inlet 13-1 is located on the outer wall of the multi-media mixing connection valve 13.

The multi-media mixing chamber 13-7 is also provided with an air pressure detection port 13-3, and an air pressure sensor 14 is connected to the air pressure detection port 13-3. All medium inlets and air pressure detection ports 13-3 on any one of the multi-media mixing chambers 13-7 are spaced along the flow direction of the high-pressure water, and the air pressure detection ports 13-3 are closer to the diverter valve 3 than any one of the medium inlets. The two medium inlets are the abrasive medium inlet 13-4 and the polishing lubricating medium inlet 13-5 respectively, and the abrasive medium inlet 13-4 is closer to the diverter valve 3 than the polishing lubricating medium inlet 13-5; the two feed pipes are respectively For the abrasive medium feeding pipe 8 and the polishing lubricating medium feeding pipe 11, the abrasive medium feeding pipe 8 is provided with an abrasive flow regulating valve 9, and the polishing lubricating medium feeding pipe 11 is provided with a liquid flow regulating valve 12.

The jet tube 18 is connected with the multi-medium mixing chamber 13-7 in a rotational and sealing manner, and an angle adjusting member 17 and an angle dial 16 are fixed on the jet tube 18. The 0° scale of the angle dial 16 is aligned with the axis direction of the outlet of the jet nozzle 19 on the jet pipe 18, and the axis direction of the outlet of the jet nozzle 19 is perpendicular to the axis of the jet pipe 18; the angle adjustment member 17 adopts gears, two The direction of the jet head 19 is opposite, and the two angle adjustment pieces 17 are engaged.

In this embodiment, the diverter valve 3 adopts a three-way diverter valve; the high-pressure water inlet pipe 1 is threadedly connected to the inlet end of the three-way diverter valve through the first locking nut 2, and the three-way diverter valve is provided with a sealing nut 4. One end of the water diversion pipe 5 is threadedly connected to the two outlet ends of the three-way diverter valve through the second locking nut, and the other end of the high-pressure water diversion pipe 5 is threadedly connected to one end of the transition compression joint 7 through the third locking nut 6, The other end of the transition compression joint 7 is threadedly connected with the high-pressure water inlet 13 - 1 in the multi-media mixing connection valve 13 , and the gemstone nozzle 20 is compressed in the multi-media mixing connection valve 13 .

The abrasive medium feeding pipe 8 is threadedly connected to one end of the abrasive grain flow regulating valve 9, and the other end of the abrasive grain flow regulating valve 9 is connected to the abrasive medium inlet 13-4 of the multi-media mixing connection valve 13 through a right-angle joint 10; polishing; The lubricating medium feed pipe 11 is screwed with one end of the liquid flow regulating valve 12, and the other end of the liquid flow regulating valve 12 is connected to the polishing lubricating medium inlet 13-5 of the multi-media mixing connection valve 13 through the right-angle joint 10, and the air pressure sensor 14 is connected to the The air pressure detection port 13 - 3 of the multimedia mixing connection valve 13 is connected.

The top end of the jet pipe 18 is screwed to the multi-media mixing connection valve 13 through the fourth locking nut 15-2, and an elastic locking sleeve 15-1 is provided between the jet pipe 18 and the multi-media mixing connection valve 13. When the fourth locking nut 15-2 is used, the elastic locking sleeve 15-1 will be clamped by the jet tube 18, the multi-media mixing connection valve 13 and the fourth locking nut 15-2, so as to ensure that the jet tube 18 is mixed with the multi-media The tightness between the connection valves 13 .

The angle adjustment member 17 is gradually fixed on the two jet pipes 18 respectively, the angle dial 16 is fixedly connected with the angle adjustment member 17 component by bolts, and the 0° scale of the angle dial 16 is aligned with the axis direction of the outlet of the jet nozzle 19, and the angle dial 16. The angle adjustment member 17 assembly and the jet tube 18 can rotate together along the axis of the corresponding jet tube 18, and it is stipulated that the outlet of the two jet nozzles 19 is 0° relative to each other, and the angle dial 16 can directly read the rotation angle of the jet tube 18, and The included angle of the two jet nozzles 19 is 180° when the outlets of the two jet nozzles 19 are opposite to each other; when the jet nozzle 19 rotates to the target angle, the jet pipe 18 passes through the jet pipe compression assembly 15 and the jet of the multi-media mixing connection valve 13 The pipe connection port 13-6 is sealed tightly.

For the multi-media mixing connection valve 13, the air pressure detection port 13-3, the abrasive medium inlet 13-4 and the polishing lubricating medium inlet 13-5 are distributed at intervals, and there is a certain distance between the ports, and d ₁ is greater than the radius of the detection port, d ₂ is greater than the sum of the radius of the detection port and the radius of the abrasive particle inlet, and d ₃ is greater than the sum of the radius of the abrasive particle inlet and the liquid inlet radius, which can effectively avoid air pressure detection and the interaction of solid-liquid media in the process of entering the multi-media mixing chamber 13-7. interference to facilitate adequate mixing of multi-media.

The present invention also provides a multi-media coordinated water jet surface enhancement spraying method. Based on the above-mentioned multi-media coordinated water jet surface enhancement injection device, each multi-medium mixing chamber 13-7 is connected to each other through the high-pressure water inlet pipe 1 and the diverter valve 3. The high-pressure water is fed into each multi-media mixing chamber 13-7, and the abrasive medium and polishing lubricating medium are introduced into each multi-media mixing chamber 13-7. The high-pressure water, abrasive medium and polishing medium in each multi-media mixing chamber 13-7 After the lubricating medium is mixed together, it is sprayed through the jet nozzle 19 at the end of the jet pipe 18; the multi-medium mixed water jet sprayed by the jet nozzle 19 is used to spray the surface of the workpiece to be strengthened to strengthen the surface of the workpiece to be strengthened.

The following example illustrates the use of the multi-media collaborative water jet surface enhancement spray device of this embodiment:

Example 1: As shown in FIG. 8, the multi-media coordinated water jet surface strengthening spray device of this embodiment is applied to the double-sided surface strengthening of the thin plate workpiece 21, and the multi-media coordinated water jet surface strengthening spray device of this embodiment can be used. Installed on a three-axis machine tool, machining center or mechanical arm, the thin plate workpiece 21 is placed in the middle of the two jet tubes 18 to ensure that the target distance of the two jet nozzles remains the same, and to ensure that the forces on both sides of the thin plate are the same, to avoid the surface During the strengthening process, the thin plate is deformed due to the uneven force on both sides, and the two jet nozzles move relative to the thin plate workpiece 21. By controlling the water pressure of the jet, the moving speed of the nozzle, the flow of abrasive medium, the flow of polishing lubricating medium, and the angle of the jet, a lot of changes can be made. The medium cooperates with the jet intensification process to optimize the optimal jet intensification parameters.

Example 2: As shown in FIG. 9 , the multi-media synergistic water jet surface strengthening spray device of this embodiment is applied to the double-sided surface strengthening of the outer wall of the first rotating workpiece 22. The first rotating workpiece 22 can be cylindrical or elliptical cylinder, etc.; by adjusting the distance between the two jet nozzles and the outer wall of the workpiece, and adjusting the angle of the two jet nozzles, the axis of the jet outlet corresponds to the axis of the workpiece. During the surface strengthening process of the outer wall of the first rotary workpiece 22, the first rotary workpiece 22 rotates at a constant speed along its own axis, and the jet nozzle moves slowly from bottom to top or from top to bottom, so as to achieve full coverage of the outer wall of the first rotary workpiece 22. strengthen. The two nozzles strengthen the outer wall at the same time, which greatly improves the surface strengthening efficiency and effect.

Example 3: As shown in FIG. 10, the multi-media synergistic water jet surface strengthening spray device of this embodiment is applied to the double-sided surface strengthening of the inner wall of the second rotating workpiece 23. The second rotating workpiece 23 can be cylindrical or elliptical cylindrical shape, etc.; by adjusting the distance between the two jet nozzles and the inner wall of the workpiece, and adjusting the angle of the two jet nozzles, the axis of the jet outlet corresponds to the axis of the workpiece. During the surface strengthening process of the inner wall of the second rotary workpiece 23, the second rotary workpiece 23 rotates at a constant speed along its own axis, and the jet nozzle moves slowly from bottom to top or from top to bottom, so as to achieve full coverage of the inner wall of the second rotary workpiece 23. strengthen. The two nozzles strengthen the inner wall at the same time, which greatly improves the surface strengthening efficiency and effect.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In this specification, specific examples are used to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; There will be changes in the specific implementation manner and application scope of the idea of the invention. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (9)

1. The multi-medium cooperated water jet surface strengthening jetting device is characterized in that: including high pressure water inlet pipe, flow divider and many media mixing connection valve, be provided with two at least mutual isolated many media hybrid chambers in the many media mixing connection valve, high pressure water inlet pipe and every many media hybrid chambers all one end with the flow divider intercommunication, every many media hybrid chambers's the other end all is connected with the efflux pipe, the efflux pipe is kept away from many media hybrid chambers's one end is provided with the fluidic sprinkler, every many media hybrid chambers all communicates there are two at least medium entries, every the medium entry is kept away from corresponding many media hybrid chambers's one end all is connected with the inlet pipe.

2. The multi-medium cooperative water jet surface strengthening and spraying device according to claim 1, wherein: the multi-medium mixing cavity is communicated with one end of the flow dividing valve, a high-pressure water inlet is formed in the end, communicated with the flow dividing valve, of the multi-medium mixing cavity, a jewel nozzle is arranged in the high-pressure water inlet, a high-pressure water overflow port is communicated with the high-pressure water inlet, and an opening, far away from the high-pressure water inlet, of the high-pressure water overflow port is located on the outer wall of the multi-medium mixing connecting valve.

3. The multi-medium cooperative water jet surface strengthening spraying device as claimed in claim 1, wherein: the multi-medium mixing cavity is also provided with an air pressure detection port, and the air pressure detection port is connected with an air pressure sensor.

4. The multi-medium cooperative water jet surface strengthening and spraying device according to claim 3, wherein: all the medium inlets and the air pressure detection ports on any one of the multi-medium mixing cavities are distributed at intervals along the flowing direction of high-pressure water, and the air pressure detection ports are closer to the diverter valve than any one of the medium inlets.

5. The multi-medium cooperative water jet surface strengthening spraying device as claimed in claim 4, wherein: each multi-medium mixing cavity is provided with two medium inlets, the two medium inlets are an abrasive particle medium inlet and a polishing lubricating medium inlet respectively, and the abrasive particle medium inlet is closer to the flow dividing valve than the polishing lubricating medium inlet; and each feeding pipe is provided with a flow regulating valve.

6. The multi-medium cooperative water jet surface strengthening and spraying device according to claim 1, wherein: two multi-medium mixing cavities are arranged in the multi-medium mixing connecting valve, and the diverter valve is a three-way diverter valve; the multi-medium mixing cavity is communicated with the flow dividing valve through a high-pressure flow dividing pipe.

7. The multi-medium cooperative water jet surface strengthening spraying device as claimed in claim 6, wherein: the jet pipe is connected with the multi-medium mixing cavity in a rotating and sealing mode, and an angle adjusting piece and an angle dial are fixedly arranged on the jet pipe.

8. The multi-medium cooperative water jet surface peening apparatus as recited in claim 7, wherein: the 0-degree scale of the angle dial is aligned with the axial direction of the outlet of the jet flow spray head on the jet pipe, and the axial direction of the outlet of the jet flow spray head is vertical to the axial direction of the jet pipe; the angle adjusting piece adopts a gear; the two jet spray heads are oppositely oriented, and the two angle adjusting pieces are meshed.

9. A multi-medium cooperative water jet surface strengthening injection method is characterized in that: the multi-medium cooperative water jet surface strengthening injection device based on any one of claims 1 to 8, wherein high-pressure water is introduced into each multi-medium mixing chamber through a high-pressure water inlet pipe and a diverter valve, abrasive medium and polishing lubricating medium are introduced into each multi-medium mixing chamber through different feed pipes, and the high-pressure water, the abrasive medium and the polishing lubricating medium in each multi-medium mixing chamber are mixed together and then are injected out through a jet nozzle at the tail end of a jet pipe; and spraying the surface of the workpiece to be strengthened by using the multi-medium mixed water jet sprayed by the jet flow nozzle so as to strengthen the surface of the workpiece to be strengthened.

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