Abrasive jet cutting head flow stabilizer

Abstract

The utility model provides a kind of abrasive jet cutting head steady flow device, comprising: storage tank, the bottom of the storage tank is conically arranged, the bottom of the storage tank is communicated with discharge pipe, the upper end of the storage tank is equipped with feed inlet;Cutting head, the upper end of the cutting head is communicated with high pressure water connecting pipe, the lower end of the cutting head is obliquely provided with abrasive inlet pipe;Feeding part, the feeding part is arranged in the storage tank and the discharge pipe, and is communicated with the abrasive inlet pipe, the abrasive jet cutting head steady flow device is accurately conveyed to the abrasive inlet pipe of cutting head in the storage tank by feeding part, dry air flow is continuously introduced into the bottom of storage tank and feeding part by the dehumidification part arranged, prevent abrasive damp agglomerate, realize the synergy of initiative drying and accurate feeding, effectively solve the unstable conveying, block and inaccurate metering etc. caused by abrasive due to damp, ensure the continuity and cutting quality of abrasive jet cutting.

Description

Technical Field

[0001] This utility model relates to the field of abrasive jet cutting technology, and more specifically, to a flow stabilizing device for an abrasive jet cutting head. Background Technology

[0002] A waterjet abrasive cutter is a machine that uses a mixture of high-pressure water jet and abrasive to cut various materials. By spraying the high-pressure water jet and abrasive mixture onto the surface of the material being cut at extremely high speed, the material can be cut into the desired shape through impact and grinding.

[0003] However, existing abrasive jet cutting equipment generally uses a storage tank in conjunction with a screw feeder to deliver abrasive to the cutting head. Although the screw feeder itself has a certain metering capacity, its operating performance is highly susceptible to the physical state of the abrasive. Abrasive, especially in environments with high humidity, easily absorbs moisture from the air and becomes damp. Damp abrasive particles adhere to each other, causing a sharp decrease in their flowability. The damp abrasive tends to stick together at the conical bottom of the storage tank, preventing it from falling smoothly to the screw feeder, causing delivery interruptions. This results in lower cutting stability of the cutting head. Furthermore, within the screw conveyor and the final flexible conveyor pipe, damp abrasive adheres to the pipe walls and blades, gradually accumulating and causing blockages. This not only leads to uneven feeding but also requires frequent shutdowns for manual cleaning, severely impacting the efficiency of continuous equipment operation. Utility Model Content

[0004] The purpose of this invention is to provide a flow stabilizing device for an abrasive jet cutting head to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides an abrasive jet cutting head flow stabilizing device, comprising: a storage tank, the bottom of which is conical, a discharge pipe connected to the bottom of which is affixed, and an inlet at the top of which is a feed port; A cutting head, the upper end of which is connected to a high-pressure water connection pipe, and the lower end of which is inclinedly provided with an abrasive inlet pipe; A feeding section is provided in the storage tank and the discharge pipe and is connected to the abrasive inlet pipe for accurately measuring and conveying abrasive. A dehumidification section is installed at the bottom of the storage tank and is used to continuously input dry airflow into the dehumidification section and the feeding section. The cleaning section is disposed on the dehumidification section and connected to the abrasive inlet pipe, and is used to reversely convey the dry airflow to the feeding section.

[0006] Furthermore, the feeding unit includes a conveying shaft rotatably installed in the discharge pipe and the storage tank, a spiral blade fixed outside the conveying shaft and disposed in the discharge pipe and the storage tank, a material collection frame connected to the lower end of the discharge pipe, a flexible conveying pipe having one end connected to the lower end of the material collection frame and the other end connected to the abrasive inlet pipe.

[0007] Furthermore, the feeding unit also includes a bracket fixed to the top of the storage tank, a servo motor mounted on the bracket, two stirring rods symmetrically fixed to the outside of the conveying shaft, two stirring blades respectively fixed to the lower ends of the two stirring rods and adapted to the bottom of the storage tank, and a small disturbance flow rod fixed in a ring array to the bottom of the storage tank; The output end of the servo motor is fixedly connected to the upper end of the feed shaft.

[0008] Furthermore, the dehumidification section includes an assembly groove formed at the bottom of the storage tank, an annular fluidizing plate disposed in the assembly groove, an air equalization hood fixed to the bottom of the storage tank by bolts and abutting against the lower surface of the annular fluidizing plate, an annular air equalization pipe disposed outside the air equalization hood, and several transition pipes arranged in a ring array between the annular air equalization pipe and the air equalization hood for communicating the annular air equalization pipe and the air equalization hood.

[0009] Furthermore, the dehumidification section also includes an air inlet pipe connected to the annular air distribution pipe, a diversion pipe with one end connected to the air inlet pipe and the other end connected to the upper end of the collection frame, and a flow regulating valve and a first solenoid valve installed on the diversion pipe.

[0010] Furthermore, the dehumidification unit also includes a drying box, an air pump installed on the drying box, the air inlet of the air pump being connected to the top of the drying box via a pipe, a number of material filter frames for placing desiccant being slidably assembled inside the drying box, and an air supply pipe connected to an external air supply device being connected to the bottom of the drying box. The other end of the air inlet pipe is connected to the air outlet of the air pump.

[0011] Furthermore, the cleaning section includes a cleaning pipe with one end connected to the diversion pipe and disposed between the flow regulating valve and the first solenoid valve, and a second solenoid valve and a check valve respectively installed at both ends of the cleaning pipe; The other end of the cleaning pipe is connected to the abrasive inlet pipe.

[0012] Compared with the prior art, the embodiments of this utility model have the following beneficial effects: The abrasive jet cutting head flow stabilization device continuously introduces dry airflow into the bottom of the storage tank and the conveying channel through the dehumidification section, actively drying the abrasive throughout the entire process. The design of the annular fluidizing plate and the air distribution hood ensures uniform airflow distribution without dead corners, keeping the abrasive in a dry and fluffy flow state at all times. This completely solves the problems of bridging, adhesion, and blockage caused by moisture. Combined with the precise feeding of the abrasive by the spiral blades in the feeding section, and the breaking and combing of the abrasive in the storage tank by the two stirring rods and stirring liquid, it ensures that the abrasive can enter the conveying stage smoothly and evenly, making the abrasive flow rate delivered to the cutting head highly stable, thereby ensuring the uniformity of the cutting jet and the stability of the cutting quality. This abrasive jet cutting head flow stabilization device, through its cleaning section, can perform reverse high-pressure purging of the conveying pipeline in the event of accidental blockage in the flexible conveying pipe by simply switching the states of the first and second solenoid valves. This structure requires no disassembly of any parts and can complete the cleaning within seconds, enabling rapid maintenance without stopping the machine or with very short downtime, significantly reducing equipment downtime and improving production efficiency. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 A perspective view of the present invention is shown; Figure 2 A partial perspective view of the present invention is shown; Figure 3 This invention demonstrates a partially disassembled three-dimensional representation. Figure 1 ; Figure 4 A partial bottom-view perspective view of this utility model is shown; Figure 5 A partial cross-sectional perspective view of this utility model is shown; Figure 6 This invention demonstrates a partially disassembled three-dimensional representation. Figure 2 .

[0015] In the picture 1. Storage tank; 2. Discharge pipe; 3. Inlet; 4. Cutting head; 5. High-pressure water connection pipe; 6. Abrasive inlet pipe; 7. Feeding section; 8. Dehumidification section; 9. Cleaning section; 10. Conveying shaft; 11. Spiral blade; 12. Collection frame; 13. Flexible conveying pipe; 14. Support; 15. Servo motor; 16. Stirring rod; 17. Stirring blade; 18. Baffle rod; 19. Assembly slot; 20. Annular fluidized plate; 21. Gas equalization hood; 22. Annular gas equalization pipe; 23. Transition pipe; 24. Air inlet pipe; 25. Diverter pipe; 26. Flow regulating valve; 27. First solenoid valve; 28. Drying box; 29. ​​Air pump; 30. Material filter frame; 31. Air conveying pipe; 32. Cleaning pipe; 33. Second solenoid valve; 34. Check valve. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0017] like Figure 1-6 As shown, an abrasive jet cutting head flow stabilization device includes: a storage tank 1, the bottom of the storage tank 1 is conical, the bottom of the storage tank 1 is connected to a discharge pipe 2, and the upper end of the storage tank 1 is provided with a feed inlet 3. Cutting head 4, the upper end of the cutting head 4 is connected to a high-pressure water connection pipe 5, and the lower end of the cutting head 4 is inclinedly provided with an abrasive inlet pipe 6; The feeding section 7 is disposed in the storage tank 1 and the discharge pipe 2 and is connected to the abrasive inlet pipe 6, and is used to accurately measure and transport abrasive. Dehumidification section 8 is installed at the bottom of the storage tank 1 and is used to continuously input dry airflow into the dehumidification section 8 and the feeding section 7. Cleaning section 9 is disposed on the dehumidification section 8 and connected to the abrasive inlet pipe 6, and is used to reversely convey dry airflow into the feeding section 7; Before operation, the abrasive is added to the storage tank 1 through the feed inlet 3. The conical design at the bottom of the storage tank 1 naturally guides the abrasive to converge towards the central discharge pipe 2. During use, the air pump 29 of the dehumidification unit 8 is activated, pumping dry air into the air inlet pipe 24. The main airflow enters the air distribution hood 21 through the annular air distribution pipe 22, and then is evenly blown upwards into the bottom of the storage tank 1 through the annular fluidizing plate 20, keeping the abrasive below in a dynamic state. This airflow dries the moisture on the surface of the abrasive particles and forms an air cushion between the particles, greatly reducing the friction and cohesion of their downward movement. To prevent abrasive agglomeration, another portion of the drying airflow is blown into the collection frame 12 through the diverter pipe 25, performing secondary drying on the abrasive about to enter the final conveying section. A slight positive pressure is created here to prevent humid air backflow. This airflow moves along with the abrasive moving in the flexible conveying pipe 13, actively drying the abrasive throughout the entire process. Simultaneously, the servo motor 15 drives the stirring blade 17 to rotate, cooperating with the fixed minor disturbance flow rod 18 to mechanically break up any initial clumps, ensuring smooth abrasive descent and eliminating conveying instability and interruptions caused by abrasive agglomeration due to moisture. The cutting jet is uniform and consistent, ensuring cutting surface quality and cutting efficiency. The servo motor 15 synchronously drives the feed shaft 10 and the spiral blade 11 to rotate. The dried loose abrasive is precisely captured by the rotating spiral blade 11 and pushed downwards stably. Since the feed rate is strictly proportional to the speed of the servo motor 15, the high-precision metering and control of the abrasive flow rate can be achieved by controlling the speed of the servo motor 15. The abrasive falls into the collection frame 12 through the discharge pipe 2, and finally is transported to the abrasive inlet pipe 6 of the cutting head 4 through the flexible feed pipe 13 with the assistance of gravity and the drying airflow. The dried and precisely metered abrasive is mixed with the ultra-high pressure water from the high pressure water connection pipe 5 in the cutting head 4 to form a high-speed abrasive jet, which is sprayed out from the nozzle to perform the cutting operation. When a conveying obstruction is detected or preventative maintenance is required, the cleaning unit 9 is activated. The first solenoid valve 27 is closed, and the second solenoid valve 33 is opened. The dry high-pressure gas changes its path and flows through the cleaning pipe 32 and the one-way valve 34, rushing back into the abrasive inlet pipe 6. It also blows back through the entire flexible conveying pipe 13 and the collection frame 12, quickly clearing any slight blockage or adhered abrasive. The flow can be restored within seconds, avoiding equipment idling, abrasive waste, and frequent manual cleaning caused by blockage. The equipment runs more smoothly, and the maintenance workload, labor costs, and abrasive consumption costs are all significantly reduced.

[0018] Optionally, the feeding unit 7 includes a conveying shaft 10 rotatably installed in the discharge pipe 2 and the storage tank 1, a spiral blade 11 fixed outside the conveying shaft 10 and disposed in the discharge pipe 2 and the storage tank 1, a flexible conveying pipe 13 connected to the collection frame 12 at the lower end of the discharge pipe 2, one end of which is connected to the lower end of the collection frame 12 and the other end is connected to the abrasive inlet pipe 6; In use, the feed shaft 10 is driven to rotate, which in turn drives the spiral blades 11 to rotate. The rotating spiral blades 11 continuously push the abrasive at the bottom of the storage tank 1 downwards, through the discharge pipe 2 into the collection frame 12, and finally into the cutting head 4 through the flexible feed pipe 13. This ensures stable abrasive delivery, making it less susceptible to external interference. Furthermore, precise metering and adjustment can be achieved by adjusting the rotation speed of the feed shaft 10, which in turn complements the cutting effect of the cutting head 4. The abrasive delivery rod can be stably adjusted to achieve stable cutting flow.

[0019] Optionally, the feeding unit 7 also includes a bracket 14 fixed to the top of the storage tank 1, a servo motor 15 mounted on the bracket 14, two stirring rods 16 symmetrically fixed to the outside of the conveying shaft 10, two stirring blades 17 respectively fixed to the lower end of the two stirring rods 16 and adapted to the bottom of the storage tank 1, and a small disturbance flow rod 18 fixed in a ring array to the bottom of the storage tank 1. The output end of the servo motor 15 is fixedly connected to the upper end of the feed shaft 10; Based on the spiral feeding mechanism, a stirring function has been added. During operation, the servo motor 15 simultaneously drives the conveying shaft 10 and the stirring rod 16 and stirring blade 17 on it to rotate. The stirring blade 17 rotates close to the conical bottom of the storage tank 1, cooperating with the fixed baffle rod 18 to break up any abrasive clumps that may form and to disrupt the bridging phenomenon of the material. This ensures that the abrasive can flow smoothly into the discharge pipe 2 below, guaranteeing a smooth supply and avoiding the problem of material interruption from the source. This ensures a stable supply, and the abrasive becomes more fluffy after stirring, which is beneficial for the dehumidifying airflow of the subsequent dehumidification section 8 to pass evenly through the abrasive, improving the drying efficiency of the abrasive. The stirring and conveying share the same power source, resulting in a compact structure and low energy consumption.

[0020] Optionally, the dehumidification section 8 includes an assembly groove 19 opened at the bottom of the storage tank 1, an annular fluidizing plate 20 disposed in the assembly groove 19, an air equalization hood 21 fixed to the bottom of the storage tank 1 by bolts and abutting against the lower surface of the annular fluidizing plate 20, an annular air equalization pipe 22 disposed outside the air equalization hood 21, and a plurality of transition pipes 23 arranged in a ring array between the annular air equalization pipe 22 and the air equalization hood 21 for communicating the annular air equalization pipe 22 and the air equalization hood 21. In use, the drying airflow enters the annular gas equalization pipe 22 through the inlet pipe 24, then enters the gas equalization hood 21 through several transition pipes 23, and is evenly distributed in the gas equalization hood 21. Finally, it passes evenly through the annular fluidizing plate 20. The fluidizing plate is made of materials such as sintered metal, porous ceramic or precision microporous mesh, and has a large number of extremely small, evenly distributed pores. This allows the drying airflow to enter the storage tank 1 through several airflow pores, blowing towards the abrasive at the bottom of the storage tank 1 like a uniform air cushion. This ensures that the abrasive at the bottom of the tank always maintains good fluidity, eliminates the arching phenomenon formed by the compaction of the abrasive at the conical bottom, and ensures that the abrasive can fall smoothly into the discharge pipe 2, achieving stable material supply and preventing bridging or blockage at the conical bottom. At the same time, since the drying airflow seeps upward through the entire porous plate, the abrasive in all areas of the bottom of the storage tank 1 can fully contact the drying gas, effectively removing moisture from the surface of the abrasive and avoiding the problem of material dampness and clumping, thus effectively improving the stability of abrasive conveying.

[0021] Optionally, the dehumidification section 8 further includes an air inlet pipe 24 connected to the annular air distribution pipe 22, a diversion pipe 25 with one end connected to the air inlet pipe 24 and the other end connected to the upper end of the collection frame 12, and a flow regulating valve 26 and a first solenoid valve 27 installed on the diversion pipe 25. While the feeding section 7 feeds abrasive to the cutting head 4, some of the drying gas is guided to the top of the collecting frame 12 through the diverter pipe 25 to perform secondary drying on the abrasive that is about to enter the final conveying stage. A slight positive pressure is created here, preventing humid air from flowing back in and assisting the abrasive to flow downwards, reducing the risk of blockage at the outlet of the collecting frame 12. This ensures that the conveyed abrasive is continuously enveloped in the drying airflow and is not disturbed by humid air, maintaining a dry state in the flexible conveying pipe 13. This ensures that the abrasive entering the cutting head 4 is absolutely dry, thereby ensuring stable and smooth flow of the abrasive in the flexible conveying pipe 13 and effectively preventing the abrasive from being trapped in the flexible conveying pipe 13. The possibility of blockage in step 3 further ensures the stable flow effect of the cutting head 4. The flow regulating valve 26 can precisely adjust the gas flow rate entering the diversion pipe 25, making it easy to find the most suitable flow rate based on factors such as ambient humidity and abrasive characteristics. This ensures that the drying airflow can effectively dry and form positive pressure, without interfering with the normal transport of the abrasive due to excessive airflow, and ensures the strength of the cleaning airflow in the subsequent cleaning section 9. The first solenoid valve 27 can be used to open or close the flow of the drying airflow to the collection frame 12. When the equipment is stopped, under maintenance, or when diversion drying is not required, the first solenoid valve 27 can be closed to allow the cleaning section 9 to operate.

[0022] Optionally, the dehumidification unit 8 also includes a drying box 28, an air pump 29 installed on the drying box 28, the air inlet of the air pump 29 being connected to the top of the drying box 28 through a pipe, a plurality of material filter frames 30 for placing desiccant being slidably assembled inside the drying box 28, and an air supply pipe 31 connected to an external air supply device being connected to the bottom of the drying box 28. The other end of the air inlet pipe 24 is connected to the air outlet of the air pump 29; When the dehumidification unit 8 is working, the air pump 29 pressurizes air into the drying chamber 28. The air passes through the filter holes at the bottom of several filter frames 30 in sequence. The moisture in the air is absorbed by the desiccant in the filter frames 30, generating dry compressed air, which is then delivered to the air inlet pipe 24 to provide a continuous dry airflow for subsequent drying operations. The desiccant is placed in the slidingly assembled filter frames 30. When the desiccant fails, the filter frame can be easily pulled out like a drawer for replacement or regeneration. The maintenance operation is simple and quick, reducing the maintenance cost and time for long-term use.

[0023] Optionally, the cleaning section 9 includes a cleaning pipe 32 with one end connected to the diversion pipe 25 and disposed between the flow regulating valve 26 and the first solenoid valve 27, and a second solenoid valve 33 and a one-way valve 34 respectively installed at both ends of the cleaning pipe 32. The other end of the cleaning pipe 32 is connected to the abrasive inlet pipe 6; When the cutting head 4 is cutting, the first solenoid valve 27 is open and the second solenoid valve 33 is closed. The drying gas is delivered to the collection frame 12 along the original path for dehumidification. However, if the flexible conveying pipe 13 or the abrasive inlet pipe 6 becomes blocked, or if the cutting operation is stopped, the first solenoid valve 27 can be closed and the second solenoid valve 33 can be opened. The drying gas is then blown back into the abrasive inlet pipe 6 through the cleaning pipe 32 and the one-way valve 34, impacting the blockage point in the reverse direction until it is cleared, thus achieving rapid clearing of the flexible conveying pipe 13. This greatly reduces equipment downtime, improves work efficiency, and cleans residual abrasive in the flexible feed tube 13, preventing abrasive from accumulating in the flexible feed tube 13 when not in use, causing moisture condensation, affecting subsequent processing, and ensuring stable cutting. Furthermore, the cleaning of the flexible feed tube 13 utilizes the drying air source of the dehumidification unit 8 as the cleaning power, eliminating the need for additional complex cleaning devices, saving costs and space. The one-way valve 34 effectively prevents abrasive or high-pressure water from entering the drying unit in reverse, protecting the safety of the air circuit components.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flow stabilizing device for an abrasive jet cutting head (4), characterized in that, include: Storage tank (1), the bottom of the storage tank (1) is conical, the bottom of the storage tank (1) is connected to a discharge pipe (2), and the upper end of the storage tank (1) is provided with a feed inlet (3). The cutting head (4) has a high-pressure water connection pipe (5) connected to its upper end, and an abrasive inlet pipe (6) is inclinedly provided at the lower end of the cutting head (4). The feeding section (7) is located in the storage tank (1) and the discharge pipe (2) and is connected to the abrasive inlet pipe (6) for accurate metering and conveying of abrasive. Dehumidification section (8) is installed at the bottom of the storage tank (1) and is used to continuously input dry airflow into the dehumidification section (8) and the feeding section (7); The cleaning section (9) is disposed on the dehumidification section (8) and connected to the abrasive inlet pipe (6) for reverse conveying of dry airflow to the feeding section (7).

2. The flow stabilizing device for an abrasive jet cutting head (4) as described in claim 1, characterized in that, The feeding section (7) includes a conveying shaft (10) rotatably installed in the discharge pipe (2) and the storage tank (1), a spiral blade (11) fixed outside the conveying shaft (10) and set in the discharge pipe (2) and the storage tank (1), a flexible conveying pipe (13) connected to the collection frame (12) at the lower end of the discharge pipe (2), one end connected to the lower end of the collection frame (12), and the other end connected to the abrasive inlet pipe (6).

3. The flow stabilizing device for an abrasive jet cutting head (4) as described in claim 2, characterized in that, The feeding section (7) also includes a bracket (14) fixed to the top of the storage tank (1), a servo motor (15) mounted on the bracket (14), two stirring rods (16) symmetrically fixed to the outside of the conveying shaft (10), two stirring blades (17) respectively fixed to the lower end of the two stirring rods (16) and adapted to the bottom of the storage tank (1), and a small disturbance flow rod (18) fixed in a ring array at the bottom of the storage tank (1). The output end of the servo motor (15) is fixedly connected to the upper end of the feed shaft (10).

4. The abrasive jet cutting head (4) flow stabilizing device as described in claim 2, characterized in that, The dehumidification section (8) includes an assembly groove (19) opened at the bottom of the storage tank (1), an annular fluidizing plate (20) disposed in the assembly groove (19), an air equalization hood (21) fixed to the bottom of the storage tank (1) by bolts and abutting against the lower surface of the annular fluidizing plate (20), an annular air equalization pipe (22) disposed outside the air equalization hood (21), and several transition pipes (23) arranged in a ring array between the annular air equalization pipe (22) and the air equalization hood (21) for communicating the annular air equalization pipe (22) and the air equalization hood (21).

5. The flow stabilizing device for an abrasive jet cutting head (4) as described in claim 4, characterized in that, The dehumidification section (8) also includes an air inlet pipe (24) connected to the annular air distribution pipe (22), a diversion pipe (25) with one end connected to the air inlet pipe (24) and the other end connected to the upper end of the collection frame (12), and a flow regulating valve (26) and a first solenoid valve (27) installed on the diversion pipe (25).

6. The flow stabilizing device for an abrasive jet cutting head (4) as described in claim 5, characterized in that, The dehumidification unit (8) also includes a drying box (28), an air pump (29) installed on the drying box (28), the air inlet of the air pump (29) is connected to the top of the drying box (28) through a pipe, a number of material filter frames (30) for placing desiccant are slidably assembled inside the drying box (28), and the bottom of the drying box (28) is connected to an air supply pipe (31) connected to an external air supply device. The other end of the air inlet pipe (24) is connected to the air outlet of the air pump (29).

7. The flow stabilizing device for an abrasive jet cutting head (4) as described in claim 5, characterized in that, The cleaning section (9) includes a cleaning pipe (32) with one end connected to the diversion pipe (25) and disposed between the flow regulating valve (26) and the first solenoid valve (27), and a second solenoid valve (33) and a check valve (34) respectively installed at both ends of the cleaning pipe (32). The other end of the cleaning pipe (32) is connected to the abrasive inlet pipe (6).

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