1. The pulse type spray head device with the cleaning function is characterized by comprising a grinding module and a cleaning module, wherein the grinding module comprises a grinding spray head, a mixing pipe and a grinding pressure conveying pipe; the mixing pipe is communicated between the grinding processing spray head and the grinding processing pressure conveying pipe; the grinding pressure conveying pipe is provided with a grinding pressure branch pipe; a mixing branch pipe is arranged on the mixing pipe;

the cleaning module comprises a cleaning spray head and a cleaning pressure conveying pipe, and the cleaning spray head is communicated with the cleaning spray head; the cleaning pressure conveying pipe is provided with a first cleaning pressure branch pipe and a second cleaning pressure branch pipe, and the second cleaning pressure branch pipe is positioned in front of the first cleaning pressure branch pipe along the conveying direction; the cleaning pressure conveying pipe is provided with a cleaning conveying switch, and the cleaning conveying switch is positioned in front of the second cleaning pressure branch pipe along the conveying direction;

the grinding pressure branch pipe is communicated with the first cleaning pressure branch pipe through a first one-way valve; the mixing branch pipe is communicated with the second cleaning pressure branch pipe through a second one-way valve; the first check valve and the second check valve are opposite in passage direction.

2. The pulse type spray head device with the cleaning function according to claim 1, wherein an angle between an axis of the mixing branch pipe and an axis of the mixing pipe is α, and α is 45 °.

3. The pulse type spray head device with the cleaning function according to claim 1, wherein an angle between an axis of the feeding pipe and an axis of the grinding processing spray head is β, and β is 45 °.

4. The pulse type spray head device with the cleaning function according to claim 1, wherein an end of the inner cavity of the mixing branch pipe close to the second check valve is provided with a first divergent section, and a divergent angle θ of the first divergent section₁，θ₁＝15°-45°。

5. The pulse type spray head device with the cleaning function as claimed in claim 1, wherein an end of the inner cavity of the mixing tube near the grinding processing spray head is provided with a second divergent section, and a divergent angle θ of the second divergent section₂，θ₂＝15°-45°。

6. The pulse type spray head device with the cleaning function as claimed in claim 1, wherein the inner cavity of the mixing tube is provided with a tapered section at one end close to the grinding pressure delivery tube, and the tapered section has a tapered angle θ₃，θ₃＝15°-45°。

Background

The principle of the reinforced grinding processing is that steel balls, grinding powder, grinding fluid and compressed gas are mixed and sprayed to the surface of a workpiece to be processed, and mixed jet flow sprayed obliquely and at high speed generates random equal probability collision (plastic processing and residual pressure stress generation) and micro cutting (grinding) on the surface of the workpiece to be processed, so that the metal workpiece obtains lower surface roughness and consistency (shape control) thereof, and simultaneously obtains an oil pocket which is beneficial to lubrication and high performances of small friction, corrosion resistance, wear resistance, fatigue resistance and the like. When the mixed jet impacts the surface of the workpiece, the surface plastic strengthening and two-stage grinding and cutting effects are simultaneously performed on the workpiece, so that the surface strength of the workpiece is improved, the surface roughness of the workpiece is improved, and the service life of the workpiece is prolonged.

In the traditional grinding process, the mixed material is sprayed onto the surface of a workpiece at a high speed through a straight nozzle, so that the workpiece is subjected to reinforced grinding. The spray velocity is generally kept constant during the process, while a continuous spray tends to form a deposit on or near the process surface, affecting the process results and cleanliness of the process environment.

Disclosure of Invention

The invention aims to overcome the existing problems and provides a pulse type spray head device with a cleaning function, which not only integrates the cleaning function, but also realizes pulse type spraying of grinding materials and reinforced modified grinding fluid by utilizing a water hammer effect, and is beneficial to improving the reinforced grinding processing effect and the cleanliness of the processing environment.

The purpose of the invention is realized by the following technical scheme:

a pulse type spray head device with a cleaning function comprises a grinding processing module and a cleaning module, wherein the grinding processing module comprises a grinding processing spray head, a mixing pipe and a grinding processing pressure conveying pipe, and a feeding pipe is arranged on the grinding processing spray head; the mixing pipe is communicated between the grinding processing spray head and the grinding processing pressure conveying pipe; the grinding pressure conveying pipe is provided with a grinding pressure branch pipe; a mixing branch pipe is arranged on the mixing pipe;

the cleaning module comprises a cleaning spray head and a cleaning pressure conveying pipe, and the cleaning spray head is communicated with the cleaning spray head; the cleaning pressure conveying pipe is provided with a first cleaning pressure branch pipe and a second cleaning pressure branch pipe, and the second cleaning pressure branch pipe is positioned in front of the first cleaning pressure branch pipe along the conveying direction; the cleaning pressure conveying pipe is provided with a cleaning conveying switch, and the cleaning conveying switch is positioned in front of the second cleaning pressure branch pipe along the conveying direction;

the grinding pressure branch pipe is communicated with the first cleaning pressure branch pipe through a first one-way valve; the mixing branch pipe is communicated with the second cleaning pressure branch pipe through a second one-way valve; the first check valve and the second check valve are opposite in passage direction.

The pulse type spray head device with the cleaning function has the working principle that:

when the polishing machine works, the reinforced modified grinding fluid is respectively introduced into the grinding processing pressure conveying pipe and the cleaning pressure conveying pipe at a certain pressure, the reinforced modified grinding fluid enters the grinding processing spray head along the grinding processing pressure conveying pipe and the mixing pipe, and meanwhile, the grinding material enters the grinding processing spray head from the feeding pipe, is converged with the reinforced modified grinding fluid and then is sprayed to the surface of a workpiece at a high speed; the reinforced modified grinding fluid enters the cleaning spray head along the cleaning pressure delivery pipe (at the moment, the cleaning delivery switch is in an open state), and then is sprayed to the processed surface or the vicinity of the processed surface of the workpiece by the cleaning spray head to clean the workpiece.

After the pressure-type grinding device is started for a certain time, the cleaning conveying switch is switched to be in a closed state, the cleaning spray head stops spraying, and at the moment, a positive water hammer effect is generated in the cleaning pressure conveying pipe, so that the pressure in the cleaning pressure conveying pipe is suddenly increased, the reinforced modified grinding fluid in the cleaning pressure conveying pipe is driven to enter the mixing pipe through the second one-way valve and then conveyed to the grinding processing spray head from the mixing pipe, and the spraying speed of the grinding materials is greatly increased. After closing for a certain time, the cleaning delivery switch is switched to be in an open state, the reinforced modified grinding fluid instantly enters the cleaning spray head along the cleaning pressure delivery pipe, and at the moment, a negative water hammer effect is generated in the cleaning pressure delivery pipe, namely, negative pressure is generated in an inner cavity of the cleaning pressure delivery pipe; under the action of negative pressure, the reinforced modified grinding fluid in the grinding processing pressure conveying pipe is driven to enter the cleaning pressure conveying pipe through the first check valve, so that the spraying speed of the cleaning spray head is increased.

According to the operation, the state of the cleaning and conveying switch is constantly switched, the grinding materials can be sprayed out from the grinding processing spray head in a pulse mode, and the pulse type enhanced modified grinding fluid can be provided, so that a better enhanced processing effect and a better cleaning effect are obtained.

In a preferred embodiment of the present invention, the angle between the axis of the mixing branch pipe and the axis of the mixing pipe is α, and α is 30 to 60 °.

In a preferred embodiment of the present invention, an angle between the axis of the feeding pipe and the axis of the grinding processing nozzle is β, and β is 30 to 45 °.

In a preferable aspect of the present invention, one end of the inner cavity of the mixing branch pipe, which is close to the second check valve, is provided with a first divergent section, and a divergent angle θ of the first divergent section₂，θ₂＝15°-30°。

In a preferred embodiment of the present invention, a second diverging section is disposed at an end of the inner cavity of the mixing tube close to the grinding processing nozzle, and a diverging angle θ of the second diverging section is₁，θ₁＝15°-45°。

In a preferred embodiment of the present invention, the inner cavity of the mixing tube is close to the pressure delivery tube for grindingOne end is provided with a reducing section, and the reducing angle theta of the reducing section₃，θ₃＝15°-45°。

Compared with the prior art, the invention has the following beneficial effects:

1. the pulse type spray head device provided by the invention can improve the spraying speed of the grinding material and the reinforced modified grinding fluid by utilizing the water hammer effect, so that the grinding material and the reinforced modified grinding fluid are sprayed out in a pulse mode, and a better reinforced processing effect and a better cleaning effect are favorably obtained.

2. By integrating the cleaning module and the grinding processing module together, the grinding material and the reinforced modified grinding fluid can be simultaneously provided without additionally arranging an independent cleaning device.

3. Through the state of switching clean delivery switch, the clean conveyer pipe that has pressed can produce positive water hammer effect and negative water hammer effect to make the pressure of intracavity change, thereby realize opening of first check valve and second check valve and changed the injection pressure who grinds shower nozzle and clearance shower nozzle, need not other extra drive arrangement, the structure is very ingenious, can simplify other relevant structures, reduces manufacturing cost.

Drawings

Fig. 1 is a front view of a pulse head device with a cleaning function according to the present invention.

Fig. 2 to 4 are sectional views of the pulse head device with a cleaning function according to the present invention.

Fig. 5 is a cross-sectional view of a mixing tube in the present invention.

Detailed Description

In order to make those skilled in the art understand the technical solutions of the present invention well, the following description of the present invention is provided with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Referring to fig. 1 to 5, the pulse type nozzle device with a cleaning function in this embodiment includes a grinding module and a cleaning module, the grinding module includes a grinding nozzle 1, a mixing tube 2 and a grinding pressure delivery tube 3, and a feeding tube 4 is disposed on the grinding nozzle 1; an included angle between the axis of the feeding pipe 4 and the axis of the grinding processing nozzle 1 is beta, and beta is 45 degrees; within the range of the converged included angle of 0-90 degrees, if beta is less than 30 degrees, the whole size of the grinding processing spray head 1 is increased, the utilization rate of the gravitational potential energy of the grinding material is low, and the energy consumption during the conveying of the grinding material is increased; if α > 45 °, excessive impact may be applied to the inside of the mixing tube 2, and vibration may easily occur, so that the injection system may be unstable and it may be difficult to generate a stable pulse injection flow. Therefore, in the embodiment, the included angle between the feeding pipe and the grinding processing nozzle 1 is limited to 30-45 degrees, so that the grinding material is obliquely mixed with the pressurized reinforced modified grinding liquid at a proper angle to form a grinding material mixed three-phase flow and is ejected from the grinding processing nozzle 1 at a proper speed, the utilization rate of the gravitational potential energy of the grinding material is improved, a stable pulse ejection flow can be obtained, and the reinforced processing effect is improved.

The mixing pipe 2 is communicated between the grinding processing spray head 1 and the grinding processing pressure conveying pipe 3; the grinding pressure conveying pipe 3 is provided with a grinding pressure branch pipe 5; and a mixing branch pipe 6 is arranged on the mixing pipe 2.

The cleaning module comprises a cleaning spray head 7 and a cleaning pressure conveying pipe 8, and the cleaning spray head 7 is communicated with the cleaning spray head 7; the cleaning pressure conveying pipe 8 is provided with a first cleaning pressure branch pipe 9 and a second cleaning pressure branch pipe 10, and the second cleaning pressure branch pipe 10 is positioned in front of the first cleaning pressure branch pipe 9 along the conveying direction; the cleaning pressure conveying pipe 8 is provided with a cleaning conveying switch 11, and the cleaning conveying switch 11 is positioned in front of the second cleaning pressure branch pipe 10 along the conveying direction; specifically, the cleaning delivery switch 11 is a solenoid valve.

The grinding pressure branch pipe 5 is communicated with the first cleaning pressure branch pipe 9 through a first one-way valve 12; the mixing branched pipe 6 is communicated with the second cleaning pressure branched pipe 10 through a second one-way valve 13; the first check valve 12 and the second check valve 13 are opposite in passage direction, specifically, the first check valve 12 is from the grinding pressure branch pipe 5 to the first cleaning pressure branch pipe 9, and the first check valve 12 is from the second cleaning pressure branch pipe 10 to the mixing pressure branch pipe 6.

Referring to fig. 5, the angle between the axis of the mixing branch 6 and the axis of the mixing tube 2 is α, which is 45 °. Within the included angle range of 0-90 degrees of mixing and conveying, if alpha is less than 30 degrees, the whole size of the mixing tube 2 is increased, and the speed change of the pressurized reinforced modified grinding fluid is overlarge, so that the jet flow is excessively discretized, and a good reinforced processing effect cannot be achieved; if α > 60 °, the pressure-enhanced modified slurry will have too small a speed variation range, will not have a significant acceleration effect, will cause too large impact on the inside of the mixing tube 2, will easily generate vibration, will make the jetting system unstable, and will not generate stable pulse jet. Therefore, in the embodiment, the included angle between the mixing branch pipe 6 and the mixing pipe 2 is limited to 30-60 degrees, so that the pressure-enhanced grinding modification liquid cleaned by the pressure conveying pipe 8 is obliquely mixed with the pressure-enhanced grinding modification liquid in the mixing pipe 2 at a proper angle, thereby not only playing an accelerating role, but also obtaining a stable pulse jet flow, and being beneficial to improving the enhanced processing effect.

Referring to fig. 5, a first divergent section is arranged at one end of the inner cavity of the mixing branch pipe 6 close to the second one-way valve 13, and the divergent angle theta of the first divergent section₁，θ₁15-45 °; according to the fluid continuous principle, the change of the cross section can cause the change of the flow speed, and the flow cross section area of the pipeline is gradually reduced due to the existence of the divergent angle of the divergent section, so that the flow speed of the fluid is improved, and the effect of accelerating and strengthening the modified grinding fluid is achieved. Further, when the divergent angle θ of the second divergent section₁If the angle is less than 15 degrees, the acceleration effect is not obvious, and the requirement of speed improvement during pulse type injection is difficult to meet; when the divergent angle theta of the second divergent section₁If the flow cross-sectional area is larger than 45 degrees, the energy loss of the fluid is too large due to too fast change of the flow cross-sectional area, vibration is easy to generate, the system is unstable, and stable pulse type three-phase mixed jet flow is difficult to generate. Therefore, the present embodiment changes the divergent angle θ of the second divergent section₁Limited between 15 degrees and 45 degrees, can integrate the advantages and improve the strengthening processing effect.

One end of the inner cavity of the mixing pipe 2 close to the grinding processing spray head 1 is provided with a second divergent section, and the divergent angle theta of the second divergent section₂，θ₂15-45 °; with the above configuration, the divergent angle θ of the first divergent section is set₂The value is in the range of 15 degrees to 30 degrees, the loss of smaller energy and speed is utilized to replace a larger mixing space, the pressurized reinforced grinding modification liquid for cleaning the pressure conveying pipe 8 is better mixed with the pressurized reinforced grinding modification liquid in the mixing pipe 2, the distance between the mixing branch pipe 6 and the inner wall of the mixing pipe 2 is increased, the impact of the pressurized reinforced grinding modification liquid on the inner part of the mixing pipe 2 is reduced, the vibration is reduced or avoided, and the injection system is more stable.

One end of the inner cavity of the mixing pipe 2, which is close to the grinding pressure conveying pipe 3, is provided with a reducing section, and the reducing angle theta of the reducing section₃，θ₃15-45 degrees. According to the fluid continuous principle, the change of the cross section can cause the change of the flow speed, and the flow cross section area of the pipeline is gradually reduced due to the existence of the divergent angle of the divergent section, so that the flow speed of the fluid is improved, and the effect of accelerating and strengthening the modified grinding fluid is achieved. Further, when the taper angle theta of the tapered section₃If the angle is less than 15 degrees, the acceleration effect is not obvious, and the requirement of speed improvement during pulse type injection is difficult to meet; when the taper angle theta of the tapered section₃If the angle is more than 45 degrees, the energy loss of the fluid is too large because the flow cross-sectional area changes too fast, and vibration is easy to generate, so that the system is unstable. Thus, the present embodiment will taper the taper angle θ of the tapered section₃Limited between 15 degrees and 45 degrees, can integrate the advantages and improve the strengthening processing effect.

Referring to fig. 1 to 4, the pulse type head device with a cleaning function in the present embodiment operates on the principle that:

when the polishing machine works, the reinforced modified grinding fluid is respectively introduced into the grinding processing pressure conveying pipe 3 and the cleaning pressure conveying pipe 8 at a certain pressure, the reinforced modified grinding fluid enters the grinding processing spray head 1 along the grinding processing pressure conveying pipe 3 and the mixing pipe 2, and meanwhile, the grinding material enters the grinding processing spray head 1 from the feeding pipe 4, is converged with the reinforced modified grinding fluid and then is sprayed to the surface of a workpiece at a high speed; the intensified modified grinding fluid enters the cleaning spray head 7 along the cleaning pressure delivery pipe 8 (at the moment, the cleaning delivery switch 11 is in an open state), and then is sprayed to the processed surface or the vicinity of the processed surface of the workpiece by the cleaning spray head 7 to clean the workpiece, as shown in fig. 2.

After the polishing machine is started for a certain time, the cleaning delivery switch 11 is switched to be in a closed state, the cleaning spray head 7 stops spraying, and at the moment, a positive water hammer effect is generated in the cleaning pressure delivery pipe 8, so that the pressure in the cleaning pressure delivery pipe 8 is suddenly increased, and the reinforced modified polishing liquid in the cleaning pressure delivery pipe 8 is driven to enter the mixing pipe 2 through the second one-way valve 13 and then is delivered to the polishing processing spray head 1 from the mixing pipe 2, as shown in fig. 3, so that the spraying speed of the polishing materials is greatly increased. After closing for a certain time, the cleaning delivery switch 11 is turned to be in an open state, the reinforced modified grinding fluid instantly enters the cleaning spray head 7 along the cleaning pressure delivery pipe 8, and at the moment, a negative water hammer effect is generated in the cleaning pressure delivery pipe 8, namely, negative pressure is generated in the inner cavity of the cleaning pressure delivery pipe 8; under the action of negative pressure, the reinforced modified grinding fluid in the grinding processing pressure conveying pipe 3 is driven to enter the cleaning pressure conveying pipe 8 through the first check valve, and the spraying speed of the cleaning spray head 7 is increased as shown in figure 4.

According to the above operation, the cleaning and conveying switch 11 is continuously switched to discharge the polishing material from the polishing head 1 in a pulse manner, and the pulse type enhanced polishing slurry can be supplied, thereby obtaining better enhanced processing effect and cleaning effect.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.