A pre-mixed abrasive jet wet sand screening device

Abstract

The application discloses a front-mixed abrasive jet wet sand screening device, which comprises a front-mixed abrasive jet generating device, a wet sand filling box and a sand-water alternating valve, an inclined screen is arranged in the wet sand filling box, an overflow pipe is arranged on the left side of the wet sand filling box, an inclined plate is arranged in the wet sand filling box, a vertical baffle is welded to the upper end of the inclined plate, a wet sand chamber is arranged between the inclined plate, the vertical baffle and the left side wall of the wet sand filling box, the sand-water alternating valve comprises an inner hollow pipe and an outer hollow pipe, the inner hollow pipe is arranged in the outer hollow pipe, sand discharging phase areas, sand closing phase areas, large-area output ports and rotating areas are sequentially arranged on the inner hollow pipe. The application can realize the screening function of the abrasive in the abrasive jet under the water submergence state, avoid the situation that the wet abrasive is difficult to fill, ensure the water or sand conveying function, and improve the sand screening efficiency.

Description

Technical Field

[0001] This invention relates to the field of water jet mechanical equipment design technology, and in particular to a pre-mixed abrasive jet wet sand screening device. Background Technology

[0002] A water jet is a high-speed stream of water of various shapes formed by flowing out of a nozzle. The velocity of the jet depends on the pressure drop across the nozzle exit section. Water jetting is one of the simplest forms of energy conversion and application. Typically, a power-driven pump completes a suction and discharge process, pumping a certain amount of water into a high-pressure pipeline, allowing it to reach the nozzle with a certain amount of energy. Since the nozzle orifice diameter is required to be much smaller than the high-pressure pipeline diameter, the water reaching the nozzle must be accelerated to flow out of the nozzle orifice. Thus, the water accelerated and condensed through the nozzle orifice forms a jet.

[0003] However, existing premixed abrasive jet wet sand screening devices cannot achieve the function of screening abrasives in a water-submerged state during the abrasive jet process, nor can they prevent the situation where wet abrasives are difficult to fill. They also cannot ensure the separate delivery of water or sand. Some premixed abrasive jet wet sand screening devices lack features to facilitate the screening of abrasives and the removal of impurities or large particles mixed in with the abrasives, which are then fed into the slag discharge chamber through a reserved gap. Other devices lack features to facilitate the diversion of water from the overflow pipe to the inclined plate and the flushing of the screened abrasives on the inclined plate with return water. This prevents the screened abrasives from entering the upper part of the sand conveying pipe at the bottom of the wet sand chamber. Furthermore, some premixed abrasive jet wet sand screening devices cannot effectively remove excess water from the overflow pipe. The return flow through the reflux pipe to the wet sand chamber fails to consistently submerge the abrasive in the overflow area, hindering abrasive screening. Furthermore, some pre-mixed abrasive jet wet sand screening devices lack the ability to flush out residual abrasive impurities or large particles from the inclined guide plate, and cannot adequately fill the overflow area with water to ensure continuous submersion of the abrasive. Excess water cannot be safely discharged through the water supply pipe. Additionally, some pre-mixed abrasive jet wet sand screening devices lack the ability to control abrasive transport by rotating the relative positions of the inner and outer hollow tubes, and cannot achieve water input / output functions. They also cannot control the output or shut-off of screened abrasive by aligning the sand outlet or sealing plate with the sand supply pipe according to the sand requirements. Therefore, it is necessary to provide a pre-mixed abrasive jet wet sand screening device that is simple in structure, quick and convenient to operate, safe, and efficient. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a pre-mixed abrasive jet wet sand screening device that is simple in structure, quick and convenient to operate, safe and efficient.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A pre-mixing abrasive jet wet sand screening device, comprising a pre-mixing abrasive jet generator, further comprising a wet sand filling box and a sand-water alternating rotary valve, wherein an inclined screener is installed inside the wet sand filling box, the height of the inclined screener decreasing from left to right, a vertical plate is provided at the right end of the inclined screener, a reserved gap is provided between the vertical plate and the right side wall of the wet sand filling box, and a [missing information - likely a device or component] is installed on the left side of the wet sand filling box. An overflow pipe is located at the same height as the left side of the inclined screen. An inclined plate is installed inside the wet sand filling box, and a vertical baffle is welded to the upper end of the inclined plate. A wet sand chamber is located between the inclined plate, the vertical baffle, and the left side wall of the wet sand filling box. A return pipe is installed at the connection between the inclined plate and the vertical baffle, and the return pipe is also located within the wet sand chamber. The return pipe is connected to the overflow pipe via a one-way hose. A sand inlet pipe is installed at the lower end of the wet sand chamber. The vertical baffle... A vertical partition is provided on the right side of the plate. An overflow area and a channel are provided between the vertical partition and the vertical baffle. The channel is located at the top of the overflow area. The top of the vertical baffle is located below the top of the vertical partition. A slag discharge chamber is provided between the right side of the vertical partition and the right side wall of the wet sand filling box. An inclined guide plate is provided at the bottom of the slag discharge chamber. An input water pipe is installed on the upper part of the inclined guide plate, and a slag discharge pipe is installed on the lower part of the inclined guide plate. An input water pipe is installed at the bottom of the overflow area. Water pipe B and safety water supply pipe, the sand-water alternating valve includes an inner hollow pipe and an outer hollow pipe, the inner hollow pipe is installed inside the outer hollow pipe, the upper end of the outer hollow pipe is connected to a sand conveying pipe, an output channel is installed on the left side of the outer hollow pipe, the inner hollow pipe is sequentially provided with a sand outlet phase area, a sand closure phase area, a large area output port and a rotation area, the position of the large area output port corresponds to the position of the output channel, the sand outlet phase area includes a sand outlet hole, and the sand closure phase area includes a sand sealing plate.

[0006] As a preferred embodiment of the present invention, the upper end of the wet sand filling box is equipped with a sand inlet hopper and a spray cleaning head, and the lower side of the spray cleaning head is parallel to the upper side of the inclined screen.

[0007] As a preferred embodiment of the present invention, the pre-mixed abrasive jet generator includes an abrasive tank, which is connected to an output channel via an input hose. The sand-water alternating rotary valve is connected to a connector and a coupling at both ends, and the connector is connected to a safety water supply pipe.

[0008] As a preferred embodiment of the present invention, gate valves are installed on the output channel, input water pipe B, safety water supply pipe, input water pipe A, and slag discharge pipe.

[0009] In field use, the operator first pours the abrasive into the sand inlet hopper and introduces low-pressure water into inlet water pipes A and B. The low-pressure water enters the overflow area and then flows into the wet sand chamber through the channel. The water level on the upper side of the low-pressure water always submerges the inclined screen. When the abrasive enters the inclined screen in the wet sand chamber, it is also submerged. The vibrator on the side of the inclined screen is started, and the inclined screen begins to perform screening. The abrasive in the inclined screen is screened and enters the bottom of the wet sand chamber. Excess low-pressure water enters the return pipe through the overflow pipe. Under the action of gravity, the excess low-pressure water washes the abrasive remaining on the inclined plate into the sand inlet pipe at the bottom of the wet sand chamber.

[0010] Secondly, the abrasive that fails to pass the screening enters the slag discharge chamber through the reserved gap on the right side of the vertical plate. Some of the abrasive that fails to pass the screening directly enters the slag discharge pipe and is discharged directly. The remaining abrasive that is not discharged directly remains on the inclined guide plate. Low-pressure water entering through the input water pipe A is flushed into the slag discharge pipe and discharged through the slag discharge pipe.

[0011] Next, the operator connects the output shaft of the stepper motor to the sand-water alternating valve via a coupling, connects the low-pressure water pipe to the connector, and connects the sand delivery pipe to the sand inlet pipe. When abrasive needs to be filled, the stepper motor is started to rotate forward, and the relative positions of the inner and outer hollow tubes of the sand-water alternating valve are adjusted so that the sand outlet corresponds to the sand delivery pipe. At this time, the abrasive and low-pressure water in the wet sand chamber mix, and the mixed abrasive and water enter the sand-water alternating valve and flow into the abrasive tank through the output channel. When abrasive filling is not required, the stepper motor is started to rotate in reverse, and the relative positions of the inner and outer hollow tubes of the sand-water alternating valve are adjusted so that the sand sealing plate corresponds to the sand delivery pipe. At this time, the abrasive in the wet sand chamber cannot enter the sand-water alternating valve, and the low-pressure water enters through the connector and flows out through the output channel.

[0012] Finally, the operator sequentially closes the abrasive valve at the bottom of the abrasive tank and the controls in the premixed abrasive jet generator. After all the water output from the spray gun is clear water, the operator reduces the output flow of the high-pressure pump station until the high-pressure pump station is shut down. Based on the next work schedule, the abrasive in the abrasive tank is cleaned properly, and regular equipment maintenance is performed before the next work is scheduled.

[0013] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention enables the screening of abrasives in a water-submerged state during abrasive jet processing, avoiding the difficulty of filling wet abrasives. It also ensures separate water or sand transport, improving sand screening efficiency. The inclined screen, vertical plate, and reserved gap facilitate screening of the abrasives and the removal of impurities or large particles mixed in with the abrasives, which are then fed into the slag discharge chamber through the reserved gap. The return pipe at the connection between the inclined plate and the vertical baffle helps guide water from the overflow pipe onto the inclined plate, allowing the returned water to flush the screened abrasives on the inclined plate, thus allowing the screened abrasives to enter the upper part of the bottom sand conveying pipe in the wet sand chamber. Positioning the overflow pipe at the same height as the left side of the inclined screen facilitates the return of excess water from the overflow pipe to the wet sand chamber via the return pipe. The top of the vertical baffle is located below the top of the vertical baffle. The system ensures that the water at the overflow point always keeps the abrasive submerged and facilitates abrasive screening. By placing water inlet pipes (A and B) and slag discharge pipes at different positions on the inclined guide plate, water can flush out residual abrasive impurities or large particles. The inclusion of channels, an overflow zone, water inlet pipe B, and a safety water pipe helps to fill the overflow zone with water, allowing water to overflow into the wet sand chamber through the channels, keeping the abrasive submerged and allowing excess water to be discharged through the safety water pipe. The use of alternating sand-water valves, inner and outer hollow pipes allows for control of abrasive transport by rotating the relative positions of the inner and outer hollow pipes. The inclusion of sand outlet phase zones, sand closing phase zones, large-area output ports, and a rotating zone facilitates water input and output. The output or shut-off of screened abrasive is controlled by aligning the sand outlet or sealing plate with the sand transport pipe according to the sand requirements. The system is simple in structure, easy to operate, and economical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 for Figure 1 Schematic diagram of the alternating rotary valve for medium sand and water;

[0016] Figure 3 This is a schematic diagram of the cross-section of a sand-water alternating valve.

[0017] In the diagram: 1. Pre-mixing abrasive jet generator; 11. Abrasive tank; 2. Wet sand filling box; 21. Inclined screen; 211. Vertical plate; 22. Overflow pipe; 23. Inclined plate; 231. Vertical baffle; 2311. Vertical partition; 24. Sand inlet hopper; 25. Spray cleaning head; 3. Sand-water alternating rotary valve; 31. Hollow inner tube; 311. Sand outlet phase zone; 3111. Sand outlet hole; 312. Sand closing phase zone; 3121. Sand sealing plate. 313. Large area output port; 314. Rotation area; 32. Outer hollow tube; 321. Sand conveying pipe; 322. Output channel; 33. Connector; 34. Coupling; 4. Reserved clearance; 5. Wet sand chamber; 51. Sand inlet pipe; 6. Return pipe; 7. Overflow area; 71. Input water pipe B; 72. Safety water conveying pipe; 8. Channel; 9. Slag discharge chamber; 91. Inclined guide plate; 911. Input water pipe A; 912. Slag discharge pipe; 10. Gate valve. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific embodiments and illustrations.

[0019] like Figure 1 , Figure 2 and Figure 3As shown, the pre-mixed abrasive jet wet sand screening device includes a pre-mixed abrasive jet generator 1, a wet sand filling box 2, and a sand-water alternating valve 3. An inclined screen 21 is installed inside the wet sand filling box 2. The height of the inclined screen 21 decreases from left to right. A vertical plate 211 is provided at the right end of the inclined screen 21. A reserved gap 4 is provided between the vertical plate 211 and the right side wall of the wet sand filling box 2. An overflow pipe 22 is installed on the left side of the wet sand filling box 2. The height of the overflow pipe 22 is located at the left side height of the inclined screen 21. Similarly, the wet sand filling box 2 is equipped with an inclined plate 23, and a vertical baffle 231 is welded to the upper end of the inclined plate 23. A wet sand chamber 5 is provided between the inclined plate 23, the vertical baffle 231 and the left side wall of the wet sand filling box 2. A return pipe 6 is provided at the connection between the inclined plate 23 and the vertical baffle 231. The return pipe 6 is also located in the wet sand chamber 5. The return pipe 6 is connected to the overflow pipe 22 through a one-way hose. A sand inlet pipe 51 is installed at the lower end of the wet sand chamber 5. A vertical partition 2311 is provided on the right side of the vertical baffle 231. The vertical partition 2311 and the vertical baffle 2311 are connected. An overflow zone 7 and a channel 8 are provided between 31. The channel 8 is located at the top of the overflow zone 7. The top of the vertical baffle 231 is located below the top of the vertical partition 2311. A slag discharge chamber 9 is provided between the right side of the vertical partition 2311 and the right side wall of the wet sand filling box 2. An inclined guide plate 91 is provided at the bottom of the slag discharge chamber 9. An input water pipe A 911 is installed on the upper part of the inclined guide plate 91, and a slag discharge pipe 912 is installed on the lower part of the inclined guide plate 91. An input water pipe B 71 and a safety water supply pipe 72 are installed at the bottom of the overflow zone 7. The sand-water alternating valve 3 It includes an inner hollow tube 31 and an outer hollow tube 32. The inner hollow tube 31 is installed inside the outer hollow tube 32. The upper end of the outer hollow tube 32 is connected to a sand conveying pipe 321. An output channel 322 is installed on the left side of the outer hollow tube 32. The inner hollow tube 31 is provided with a sand outlet phase area 311, a sand closing phase area 312, a large area output port 313, and a rotation area 314 in sequence. The position of the large area output port 313 corresponds to the position of the output channel 3211. The sand outlet phase area 311 includes a sand outlet hole 3111. The sand closing phase area 312 includes a sand sealing plate 3121.

[0020] like Figure 1 As shown, the upper end of the wet sand filling box 2 is equipped with a sand inlet hopper 24 and a spray cleaning head 25, and the lower side of the spray cleaning head 25 is parallel to the upper side of the inclined screen 21.

[0021] like Figure 1 , Figure 2 and Figure 3As shown, the premixed abrasive jet generator 1 includes an abrasive tank 11, which is connected to the output channel 322 via an input hose. The sand-water alternating rotary valve 3 is connected to a connector 33 and a coupling 34 at both ends, respectively. The connector 33 is connected to a safety water supply pipe 72.

[0022] like Figure 1 and Figure 3 As shown, gate valves 10 are installed on the output channel 322, input water pipe B 71, safety water supply pipe 72, input water pipe A 911 and slag discharge pipe 912.

[0023] In field use, the operator first pours the abrasive into the sand inlet hopper 24 and introduces low-pressure water into the inlet water pipe A 911 and inlet water pipe B 71. The low-pressure water enters the overflow area 7 and then enters the wet sand chamber 5 through the channel 8. The liquid level of the low-pressure water on the upper side always submerges the inclined screen 21. When the abrasive enters the inclined screen 21 in the wet sand chamber 5, the abrasive is also submerged. The vibrator on the side of the inclined screen 21 is started to make the inclined screen 21 perform screening. The abrasive in the inclined screen 21 is screened and enters the bottom of the wet sand chamber 5. The excess low-pressure water enters the return pipe 6 through the overflow pipe 22. Under the action of gravity, the excess low-pressure water washes the abrasive remaining on the inclined plate 23 into the sand inlet pipe 51 at the bottom of the wet sand chamber 5.

[0024] Secondly, the abrasive that is not screened enters the slag discharge chamber 9 through the reserved gap 4 on the right side of the vertical plate 211. Some of the abrasive that is not screened directly enters the slag discharge pipe 912 and is discharged directly. The remaining abrasive that is not discharged directly remains on the inclined guide plate 91. The low-pressure water that enters through the input water pipe A 911 is flushed into the slag discharge pipe 912 and discharged through the slag discharge pipe 912.

[0025] Next, the operator connects the output shaft of the stepper motor to the sand-water alternating rotary valve 3 via coupling 34, connects the low-pressure water pipe to connector 33, and connects the sand conveying pipe 321 to the sand inlet pipe 51. When abrasive needs to be filled, start the stepper motor to rotate forward, adjust the relative positions of the inner hollow tube 31 and the outer hollow tube 32 of the sand-water alternating valve 3 so that the sand outlet 3111 corresponds to the sand conveying pipe 321. At this time, the abrasive and low-pressure water in the wet sand chamber 5 are mixed. After mixing, the abrasive and water enter the sand-water alternating valve 3 and enter the abrasive tank 11 through the output channel 322. When abrasive filling is not required, start the stepper motor to rotate in reverse, adjust the relative positions of the inner hollow tube 31 and the outer hollow tube 32 of the sand-water alternating valve 3 so that the sand sealing plate 3121 corresponds to the sand conveying pipe 321. At this time, the abrasive in the wet sand chamber 5 cannot enter the sand-water alternating valve 3, and the low-pressure water enters through the connector 33 and flows out through the output channel 322.

[0026] Finally, the operator sequentially closes the abrasive valve at the lower end of the abrasive tank 11 and the control in the pre-mixing abrasive jet generator. After all the water output from the spray gun is clear, the operator reduces the output flow of the high-pressure pump station until the high-pressure pump station is shut down. Based on the next work time, the abrasive in the abrasive tank 11 is cleaned properly, and regular equipment maintenance is performed before the next work is scheduled.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-mixed abrasive jet wet sand screening device, comprising a pre-mixed abrasive jet generator, characterized in that: It also includes a wet sand filling box and a sand-water alternating valve. An inclined screen is installed inside the wet sand filling box, with its height decreasing from left to right. A vertical plate is located at the right end of the inclined screen, and a pre-reserved gap exists between the vertical plate and the right side wall of the wet sand filling box. An overflow pipe is installed on the left side of the wet sand filling box, with its height matching that of the inclined screen. An inclined plate is located inside the wet sand filling box, and a vertical baffle is welded to its upper end. A wet sand chamber is located between the inclined plate, the vertical baffle, and the left side wall of the wet sand filling box. A return pipe is located at the connection between the inclined plate and the vertical baffle, also within the wet sand chamber. The return pipe is connected to the overflow pipe via a one-way hose. A sand inlet pipe is installed at the lower end of the wet sand chamber. A vertical partition is located on the right side of the vertical baffle, and an overflow valve is located between the vertical partition and the vertical baffle. The system includes a flow zone and a channel. The channel is located at the top of the overflow zone. The top of the vertical baffle is located below the top of the vertical partition. A slag discharge chamber is located between the right side of the vertical partition and the right side wall of the wet sand filling box. An inclined guide plate is located at the bottom of the slag discharge chamber. An input water pipe A is installed on the upper part of the inclined guide plate, and a slag discharge pipe is installed on the lower part of the inclined guide plate. An input water pipe B and a safety water supply pipe are installed at the bottom of the overflow zone. The sand-water alternating valve includes an inner hollow pipe and an outer hollow pipe. The inner hollow pipe is installed inside the outer hollow pipe. A sand conveying pipe is connected to the upper end of the outer hollow pipe. An output channel is installed on the left side of the outer hollow pipe. The inner hollow pipe is sequentially provided with a sand discharge phase zone, a sand closing phase zone, a large area output port, and a rotating zone. The position of the large area output port corresponds to the position of the output channel. The sand discharge phase zone includes a sand discharge hole, and the sand closing phase zone includes a sand sealing plate.

2. The pre-mixed abrasive jet wet sand screening device according to claim 1, characterized in that: The upper end of the wet sand filling box is equipped with a sand inlet hopper and a spray cleaning head, and the lower side of the spray cleaning head is parallel to the upper side of the inclined screen.

3. The pre-mixed abrasive jet wet sand screening device according to claim 1, characterized in that: The premixed abrasive jet generator includes an abrasive tank, which is connected to an output channel via an input hose. The sand-water alternating rotary valve has connectors and couplings at both ends, and the connectors are connected to a safety water supply pipe.

4. The pre-mixed abrasive jet wet sand screening device according to claim 1, characterized in that: Gate valves are installed on the output channel, input water pipe B, safety water supply pipe, input water pipe A, and slag discharge pipe.

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