Automatic sand supply device

Abstract

The utility model discloses an automatic sand supply device. The automatic sand supply device comprises a valve body, a sand inlet and a sand outlet are formed in the two ends of the valve body, the sand inlet is connected with a sand supply tank, the sand outlet is connected with a water jet cutter head, and a gas circuit control mechanism is installed on the valve body; the gas circuit control mechanism comprises a gas inlet pipe installed on one side of the valve body, one end of the gas inlet pipe is communicated with a high-pressure gas source, and a gas outlet pipe is installed on the other side of the valve body. According to the automatic sand supply device, the valve body manufactured according to the pipe clamp valve design principle is arranged, the air outlet pipe is arranged on the valve body, air in the valve body is conveyed back to the sand outlet of the valve body, the air enters the sand supply pipeline of the water jet cutter head through the residual pressure of the air in the valve body, water return of the sand supply pipeline is prevented, and the sand supply efficiency is improved. And the whole sand supply pipeline and the high-pressure gas source only need one connecting pipeline, so that the arrangement and arrangement design of a gas path are facilitated, and the maintenance is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of water jets, in particular to a device for automatically supplying sand. Background Art

[0002] Water jet cutting is a processing method that uses abrasive-added ultra-high-pressure water flow to cut objects. It belongs to cold cutting and has the advantages of fast cutting speed, high cutting accuracy, smooth cutting surface, no thermal deformation, clean and pollution-free, etc. It is now widely used in industries such as ceramics, stone, glass, and metal processing.

[0003] A sand regulating valve is usually installed between the water jet and the sand supply tank to control the on-off and supply speed of the sand grains of the water jet. In order to prevent backwater, gas needs to be introduced into the pipeline between the sand regulating valve and the water jet, and the pressure of the gas is used to prevent water from entering the sand supply pipeline after the sand supply stops.

[0004] However, the generally used sand regulating valves are mostly pneumatically controlled sand regulating valves, which themselves need to be connected to a gas source. Coupled with the gas circuit for preventing backwater, both gas circuits need to be connected to the gas source, and the total length of the gas circuit will be greatly increased, which is not conducive to wire management and thus inconvenient for the management and maintenance of the gas circuit.

[0005] Therefore, it is necessary to provide a device for automatically supplying sand to solve the above technical problems. Summary of the Utility Model

[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a device for automatically supplying sand that can facilitate the arrangement and layout of the gas circuit.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] The device for automatically supplying sand includes: a valve body, which is manufactured based on the design principle of an automatic pipe clamp valve (pinch valve). An inlet sand port is installed at one end of the valve body, and an outlet sand port is installed at the other end. The inlet sand port is connected to a sand supply tank, and the outlet sand port is connected to a water jet cutter head. The sand grains in the sand supply tank enter the valve body through the inlet sand port, the sand outlet speed is controlled by the valve body, and the sand grains enter the water jet cutter head through the outlet sand port. The high-pressure water flow drives the sand grains to impact the workpiece to cut the workpiece. A gas circuit control mechanism is installed on the valve body. The gas circuit control mechanism includes an inlet air pipe installed on one side of the valve body. One end of the inlet air pipe is connected to a high-pressure gas source. An outlet air pipe is installed on the other side of the valve body. The outlet air pipe is provided with two gas circuit outlets, namely a return air port and an exhaust port. The outlet side of the return air port is connected to the outlet sand port. A first electric control valve is installed on the inlet air pipe, a second electric control valve is installed on the outlet air pipe, and a third electric control valve is installed on the exhaust port. The first electric control valve, the second electric control valve, and the third electric control valve are all connected to a PLC controller.

[0009] Preferably, a first barometer is installed on the air outlet pipe, and a second barometer is installed on the air return port, which is convenient for controlling the air pressure in the valve body and the sand supply pipeline.

[0010] Preferably, a drying component is installed on the sand outlet, and the drying component is used to dry the gas entering the sand supply pipeline.

[0011] Preferably, an airbag is installed in the valve body. The airbag divides the valve body into two cavities that are isolated from each other inside and outside. Both ends of the airbag are connected to the sand inlet and the sand outlet. The gravel passes through the middle of the airbag, and the airbag is not connected to the air inlet pipe and the air outlet pipe, while the valve body is connected to the air inlet pipe and the air outlet pipe.

[0012] Preferably, a plurality of partition plates are installed in the valve body, and air holes are provided on the partition plates to facilitate the flow of gas in the valve body.

[0013] Preferably, second connection rings are installed at both ends of the airbag, and a first connection ring that is hermetically connected to the connection part is installed in the valve body.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] (1) By setting a valve body manufactured based on the design principle of a pinch valve and providing an air outlet pipe on the valve body, the gas in the valve body is returned to the sand outlet of the valve body, and the residual pressure of the gas in the valve body is utilized to enter the sand supply pipeline of the water jet cutter head, preventing the sand supply pipeline from returning water, so that the entire sand supply pipeline and the high-pressure air source only require one connection pipeline, thereby facilitating the arrangement and design of the air circuit and facilitating maintenance;

[0016] (2) By setting a first barometer and a second barometer, it is convenient to control the air pressure in the valve body and the sand supply pipeline, reducing waste;

[0017] (3) By installing a drying component on the sand outlet, the corrosion rate of the sand supply pipeline can be reduced, and its service life can be extended;

[0018] (4) By installing an airbag in the valve body, the valve body is divided into two cavities that are isolated from each other inside and outside, and the design principle of the pinch valve is used to improve the sealing strength of the valve body and its anti-particle corrosion ability;

[0019] (5) By installing partition plates in the valve body, the deformation degree of the airbag can be conveniently controlled, which is beneficial to extending its service life;

[0020] (6) By setting the first connection ring and the second connection ring, it is convenient to fix the airbag in the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the automatic sand supply device provided by the utility model;

[0022] Figure 2 is Figure 1 a front view structural schematic diagram of the automatic sand supply device shown;

[0023] Figure 3 is Figure 1 a sectional view structural schematic diagram of the valve body in the automatic sand supply device shown.

[0024] Among them, the names corresponding to the reference numerals are: 1-valve body, 2-sand inlet, 3-sand outlet, 4-air inlet pipe, 5-air outlet pipe, 6-air return port, 7-exhaust port, 8-blocking partition, 9-first connection ring, 10-second connection ring, 11-first electric control valve, 12-first barometer, 13-second electric control valve, 14-second barometer, 15-drying component, 16-third electric control valve, 17-airbag. Specific embodiments

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include but are not limited to the following embodiments.

[0026] Embodiment 1:

[0027] Such as Figures 1 - 3As shown in the figure, the automatic sand supply device provided by the present utility model includes: a valve body 1, which is manufactured based on the design principle of an automatic pipe clamp valve (pinch valve). One end of the valve body 1 is provided with a sand inlet 2, and the other end is provided with a sand outlet 3. The sand inlet 2 is connected to a sand supply tank, and the sand outlet 3 is connected to a water jet cutter head. The sand grains in the sand supply tank enter the valve body 1 through the sand inlet 2, and the sand outlet speed is controlled by the valve body 1. The sand grains enter the water jet cutter head through the sand outlet 3, and the high-pressure water flow drives the sand grains to impact the workpiece to cut the workpiece. An air circuit control mechanism is installed on the valve body 1. The air circuit control mechanism includes an air inlet pipe 4 installed on one side of the valve body 1. One end of the air inlet pipe 4 is connected to a high-pressure air source. An air outlet pipe 5 is installed on the other side of the valve body 1. The air outlet pipe 5 is provided with two air circuit outlets, namely a return air port 6 and an exhaust port 7. The outlet side of the return air port 6 is connected to the sand outlet 3. A first electric control valve 11 is installed on the air inlet pipe 1, a second electric control valve 13 is installed on the air outlet pipe 5, and a third electric control valve 16 is installed on the exhaust port 7. It should be noted that the first electric control valve 11, the second electric control valve 13, and the third electric control valve 16 are connected to a PLC controller. The PLC controller operates according to the designed program to automatically control the opening and closing size and the opening and closing of the air circuits of the first electric control valve 11, the second electric control valve 13, and the third electric control valve 16. When in use, when the water jet is not enabled, the PLC starts to run. According to the program preset in the PLC, the first electric control valve 11 is fully or mostly opened. The high-pressure air source enters the valve body 1 through the air inlet pipe 4. At the same time, the incompletely closed second electric control valve 13 is incompletely opened (opened less than half), and the third electric control valve 16 is fully closed. At this time, the high-pressure air source forms high pressure in the valve body 1, making the valve body 1 in a closed state, and the sand grains cannot pass through the valve body 1. And the gas in the valve body 1 enters the sand outlet 3 through the second electric control valve 13, and then enters the water jet cutter head through the sand outlet 3. Using the air pressure impact in the pipeline, it prevents the water in the water jet cutter head from entering the sand supply pipeline, thereby preventing backwater. When the water jet is enabled, according to the program preset in the PLC, the opening degree of the first electric control valve 11 is reduced, and the speed of the high-pressure air source entering the valve body 1 through the air inlet pipe 4 is reduced. At the same time, the second electric control valve 13 is incompletely opened, and the third electric control valve 16 is incompletely opened or fully opened. At this time, the high-pressure air source forms low pressure in the valve body 1, making the valve body 1 in an open state. The opening degree is related to the air pressure in the valve body 1. The sand grains can normally pass through the valve body 1 and be supplied to the water jet cutter head for use. The gas in the valve body 1 can be discharged to the outside through the exhaust port 7.

[0028] By setting the valve body 1 manufactured based on the design principle of the pipe clamp valve, and setting the air outlet pipe 5 on the valve body 1, the gas in the valve body 1 is returned to the sand outlet 3 of the valve body 1, and the residual pressure of the gas in the valve body 1 is used to enter the sand supply pipeline of the water jet cutter head to prevent backwater in the sand supply pipeline, so that the entire sand supply pipeline and the high-pressure air source only need one connection pipeline, which is convenient for the arrangement and design of the air circuit and convenient for maintenance.

[0029] Example 2:

[0030] As shown in Figure 1 Figure [not provided], a first barometer 12 is installed on the air outlet pipe 5, and a second barometer 14 is installed on the air return port 6. The first barometer 12 is used to monitor the air pressure inside the valve body 1, thereby facilitating the control of the opening degree of the valve body 1. At the same time, the second barometer 14 is used to monitor the air pressure on the side of the sand outlet 3, thereby facilitating the control of the gas pressure in the sand supply pipeline between the sand outlet 3 and the water jet cutter head, so that the air pressure is not too low or too high, which helps to reduce the waste of the air source.

[0031] By setting the first barometer 12 and the second barometer 14, it is possible to conveniently control the air pressure in the valve body 1 and the sand supply pipeline, and reduce waste.

[0032] Example 3:

[0033] As shown in Figure 1 Figure [not provided], a drying component 15 is installed on the sand outlet 3. The drying component 15 is used to dry the gas entering the sand supply pipeline. During use, the high-pressure air source generally has a large water content. If the air source with a large water content enters the sand supply pipeline, it may cause corrosion of the sand supply pipeline. Therefore, the drying component 15 is used to dry the air source.

[0034] By installing the drying component 15 on the sand outlet 3, the corrosion rate of the sand supply pipeline can be reduced, and its service life can be extended.

[0035] Example 4:

[0036] As shown in Figures 2 - 3 Figure [not provided], an airbag 17 is installed inside the valve body 1. The airbag 17 divides the inside of the valve body 1 into two cavities that are isolated from each other. Both ends of the airbag 17 are connected to the sand inlet 2 and the sand outlet 3. The sand passes through the middle of the airbag 17, and the airbag 17 is not connected to the air inlet pipe 4 and the air outlet pipe 5, while the valve body 1 is connected to the air inlet pipe 4 and the air outlet pipe 5. So that the high-pressure gas enters the cavity between the valve body 1 and the airbag 17 from the air inlet pipe 4. The high-pressure gas squeezes the airbag 17, making its middle gradually close until it closes completely, so that the sand supply speed gradually slows down until it stops. This design refers to the design of a pneumatic pinch valve, and the pneumatic pinch valve product has the advantages of no sealing points, no leakage, resistance to particle corrosion, and no blockage when transporting liquids containing fibers.

[0037] By installing the airbag 17 inside the valve body 1, the inside of the valve body 1 is divided into two cavities that are isolated from each other. Using the design principle of the pinch valve, the sealing strength of the valve body 1 is improved, and its resistance to particle corrosion is enhanced.

[0038] Example 5:

[0039] As shown in Figure 3As shown, a plurality of partition plates 8 are installed in the valve body 1. Air holes are provided on the partition plates 8 to facilitate the flow of gas in the valve body 1. When the pressure in the valve body 1 is relatively low, the airbag 17 is squeezed by the sand grains and expands. The partition plate 8 can control the deformation of the airbag 17 within a certain range to prevent excessive deformation and affect its service life.

[0040] By installing the partition plate 8 in the valve body 1, the deformation degree of the airbag 17 can be conveniently controlled, which is beneficial to extending its service life.

[0041] Embodiment 6:

[0042] As Figure 3 shown, second connection rings 10 are installed at both ends of the airbag 17, and a first connection ring 9 that is hermetically connected to the connecting portion 10 is installed in the valve body 1. The airbag 17 is fixed in the valve body 1 by the hermetic connection between the first connection ring 9 and the second connection ring 10.

[0043] By providing the first connection ring 9 and the second connection ring 10, it is convenient to fix the airbag 17 in the valve body 1.

[0044] Working principle: When in use, when the water jet is not enabled, the PLC starts to run. According to the program preset in the PLC, the first electromagnetic valve 11 is fully or mostly opened. The high-pressure air source enters the valve body 1 through the air inlet pipe 4. At the same time, the incompletely closed second electromagnetic valve 13 is incompletely opened (opened less than half), and the third electromagnetic valve 16 is fully closed. At this time, the high-pressure air source forms high pressure in the valve body 1, making the valve body 1 in a closed state. The sand grains cannot pass through the valve body 1, and the gas in the valve body 1 passes through the second electromagnetic valve 13 and then enters the sand outlet 3 through the air return port 6 and enters the water jet cutter head through the sand outlet 3. Using the air pressure impact in the pipeline, it prevents the water in the water jet cutter head from entering the sand supply pipeline, thereby preventing backwater;

[0045] When the water jet is enabled, according to the program preset in the PLC, the opening degree of the first electromagnetic valve 11 is reduced, and the speed at which the high-pressure air source enters the valve body 1 through the air inlet pipe 4 decreases. At the same time, the second electromagnetic valve 13 is incompletely opened, and the third electromagnetic valve 16 is incompletely opened or fully opened. At this time, the high-pressure air source forms low pressure in the valve body 1, making the valve body 1 in an open state. The opening degree is related to the air pressure in the valve body 1. The sand grains can normally pass through the valve body 1 and be supplied to the water jet cutter head for use, and the gas in the valve body 1 can be discharged to the outside through the exhaust port 7.

Claims

1. An automatic sand supply device, characterized in that, Comprising: A valve body (1), with a sand inlet (2) and a sand outlet (3) installed at both ends of the valve body (1). The sand inlet (2) is connected to a sand supply tank, the sand outlet (3) is connected to a water jet cutter head, and an air circuit control mechanism is installed on the valve body (1). The air circuit control mechanism includes an intake pipe (4) installed on one side of the valve body (1). One end of the intake pipe (4) is connected to a high-pressure air source. An outlet pipe (5) is installed on the other side of the valve body (1). The outlet pipe (5) is provided with a return air port (6) and an exhaust port (7). The return air port (6) is connected to the sand outlet (3). A first electric control valve (11) is installed on the intake pipe (4), a second electric control valve (13) is installed on the outlet pipe (5), and a third electric control valve (16) is installed on the exhaust port (7).

2. The automatic sand feeding device according to claim 1, characterized in that, A first barometer (12) is installed on the outlet pipe (5), and a second barometer (14) is installed on the return air port (6).

3. The automatic sand feeding device according to claim 1, characterized in that, A drying assembly (15) is installed on the sand outlet (3).

4. An automatic sand supply device according to claim 1, characterized in that, An airbag (17) is installed inside the valve body (1).

5. An automatic sand supply device according to claim 1, characterized in that, A plurality of baffle plates (8) are installed inside the valve body (1).

6. The automatic sand feeding device according to claim 4, characterized in that, A first connecting ring (9) is installed inside the valve body (1), and second connecting rings (10) are installed at both ends of the airbag (17).

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