Waterjet cutting sand feeding system

Abstract

A water jet sand feeding system includes a sand storage box, a lifting mechanism, a support frame, a sand feeding box and a sand discharge pump. The sand feeding box is arranged at the lower part of one end of the sand storage box, and a sand discharge pipe is connected with the sand feeding box and the lower sand box of the sand storage box. The sand discharge pump is located in the sand feeding box. The lifting mechanism and the support frame are respectively located at the bottom of the sand storage box and connected with pins at both ends. The sand storage box is driven to rotate upward around one end of the support frame by the lifting mechanism, and the sand in the feeding sand box is discharged into the filtering sand box and the lower sand box. The finer sand in the lower sand box enters the sand feeding box from the sand discharge pipe and is discharged by the sand discharge pump. The present invention overcomes the problem that larger sand particles enter the cutting knife of the original water jet cutting equipment, reducing its service life and low cutting accuracy, and affecting the cutting quality. The present invention has the characteristics of simple structure, preventing larger sand particles from entering the sand feeding box, which is beneficial to increasing the service life of the cutting knife and improving cutting accuracy and quality, and simple and convenient operation.

Description

Technical Field

[0001] The invention belongs to the technical field of water cutting and relates to a water cutting sand feeding system. Background Art

[0002] Waterjet cutting equipment uses a mixture of water and sand as the medium for cutting targets. The water jet cutting pump delivers the medium to the cutting blade and then ejects it in the form of a high-speed jet. The current problem is that before the medium is formed, the sand and water are stored separately. Among them, the sand is the main abrasive during cutting, and its particle size and purity requirements are relatively high. For example, when the particle size is different, it will have a greater impact on the waterjet itself and the cutting quality; when the particle size is larger than the set value, it is easy to damage the cutting blade, reduce its service life, and the object will be rough and low-precision after cutting. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a water jet cutting sand feeding system with a simple structure. A sand feeding box is arranged at the lower part of one end of a sand storage box. A sand discharge pipe is connected with the sand feeding box and the lower sand box of the sand storage box. A sand discharge pump is located in the sand feeding box. A lifting mechanism and a support frame are respectively located at the bottom ends of the sand storage box and connected by pin shafts. The lifting mechanism drives the sand storage box to rotate upward around one end of the support frame. The sand particles in the feeding sand box are discharged into the filtering sand box and the lower sand box. The finer sand particles in the lower sand box enter the sand feeding box from the sand discharge pipe and are discharged by the sand discharge pump, so that larger sand particles are prevented from entering the sand feeding box. This is beneficial to increasing the service life of the cutting knife and improving the cutting accuracy and quality. The operation is simple and convenient.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a water jet sand feeding system, which includes a sand storage box, a lifting mechanism, a support frame, a sand feeding box and a sand discharge pump; the lifting mechanism and the support frame are respectively connected to the ear seat pin shaft at the bottom of the sand storage box, the sand discharge pipe connected to the lower sand box of the sand storage box is connected to the sand feeding box, the sand discharge pump is located at the bottom of one end of the sand feeding box, the sand discharge pipe extends out of the sand feeding box, and the sand feeding box is close to the lower part of one end of the sand storage box; the lifting mechanism drives the sand storage box to rotate around one end of the support frame and tilt toward one end of the sand feeding box;

[0005] The random counter randomly gives a value greater than N or less than N every S seconds. If the value given by the random counter is greater than N, the jacking mechanism moves upward under the control of the controller. If the value given by the random counter is less than N, the jacking mechanism moves downward under the control of the controller. When the stroke of the jacking mechanism reaches the maximum stroke and cannot be increased, the controller sends a start signal to the vibration pump. When the stroke of the jacking mechanism reaches the minimum stroke and cannot be reduced, the controller sends a start signal to the vibration pump.

[0006] The sand storage box is a hollow box structure, with ears arranged at both ends of the box bottom, and is located inside the box body and is divided into a feed sand box, a filter sand box and a lower sand box by a first filter plate and a second filter plate.

[0007] A sand inlet is arranged on one end of the upper side of the sand storage box close to the jacking mechanism and is connected to the feeding sand box.

[0008] A sand outlet is arranged at one end of the lower side of the sand storage box close to the supporting frame and is connected to the lower sand box, and the sand outlet is connected to the sand discharge pipe.

[0009] The filter holes of the first filter plate are larger than the filter holes of the second filter plate.

[0010] A discharge door is arranged on one side of the feeding sand box and the filtering sand box, and the discharge door is close to one end of the supporting frame.

[0011] The lifting mechanism is a gas cylinder or an oil cylinder.

[0012] The support frame is a frame structure with an opening facing upward, and the two ends of the opening are connected to the ear seat pins.

[0013] The sand feeding box is a hollow box structure with an observation hole arranged at the top.

[0014] A quicksand table with an inclined structure is arranged in the sand feeding box, and a sand discharge pump is located in the sand feeding box near a lower end of the quicksand table.

[0015] A water jet sand feeding system comprises a sand storage box, a lifting mechanism, a support frame, a sand feeding box and a sand discharge pump; the lifting mechanism and the support frame are respectively connected to the ear seat pin shaft at the bottom of the sand storage box, a sand discharge pipe connected to the lower sand box of the sand storage box is connected to the sand feeding box, the sand discharge pump is located at the bottom of one end of the sand feeding box, the sand discharge pipe extends out of the sand feeding box, and the sand feeding box is close to the lower part of one end of the sand storage box; the lifting mechanism drives the sand storage box to rotate around one end of the support frame and tilt toward one end of the sand feeding box. The structure is simple. A sand feeding box is arranged at the lower part of one end of the sand storage box. The sand discharge pipe is connected with the sand feeding box and the lower sand box of the sand storage box. The sand discharge pump is located in the sand feeding box. The jacking mechanism and the support frame are respectively located at the bottom of the sand storage box and connected with pin shafts at both ends. The sand storage box is driven to rotate upward around one end of the support frame by the jacking mechanism. The sand particles in the feeding sand box are discharged into the filtering sand box and the lower sand box. The finer sand particles in the lower sand box enter the sand feeding box from the sand discharge pipe and are discharged by the sand discharge pump, so that larger sand particles are prevented from entering the sand feeding box. This is beneficial to prolonging the service life of the cutting knife and improving the cutting accuracy and quality. The operation is simple and convenient.

[0016] In the preferred solution, the sand storage box is a hollow box structure, with ears at both ends of the box bottom, and is divided into a feed sand box, a filter sand box and a lower sand box by the first filter plate and the second filter plate in the box. The structure is simple, and when in use, the initial sand first enters the feed sand box, then passes through the first filter plate into the filter sand box, and finally passes through the second filter plate and falls into the lower sand box.

[0017] In a preferred solution, a sand inlet is provided on the upper side of the sand storage box near the lifting mechanism and is connected to the feeding sand box. The structure is simple. When in use, the initial sand enters the sand storage box from the sand inlet. The sand inlet is located on the upper side of the sand storage box near the lifting mechanism. When the lifting mechanism lifts the sand storage box upward, it is conducive to the sand particles rolling to the other end of the sand storage box.

[0018] In the preferred solution, a sand outlet is provided at one end of the lower side of the sand storage box near the support frame and is connected to the lower sand box, and the sand outlet is connected to the sand discharge pipe. The structure is simple, and when in use, the sand in the lower sand box enters the feeding sand box from the sand outlet along the sand discharge pipe after the sand storage box is tilted.

[0019] In a preferred solution, the filter holes of the first filter plate are larger than the filter holes of the second filter plate. The structure is simple. When in use, the larger sand particles are blocked by the first filter plate in the feed sand box, the sand particles in the filter sand box that are larger than the filter holes of the second filter plate are blocked by the second filter plate in the filter sand box, and the smaller sand particles pass through the second filter plate and enter the lower sand box.

[0020] In the preferred solution, a discharge door is provided on one side of the feed sand box and the filter sand box, and the discharge door is close to one end of the support frame. The structure is simple. When in use, the sand particles blocked in the feed sand box and the filter sand box accumulate over time, so that the filtering effect is reduced. At this time, the sand particles are discharged by opening the discharge door; when discharging, the sand storage box is lifted up by the lifting mechanism to make it tilted. The discharge door is provided at one end close to the support frame, which is conducive to the sand particles tilting toward this end, so that it is easy to discharge.

[0021] In the preferred solution, the lifting mechanism is a gas cylinder or an oil cylinder. The structure is simple. When the lifting mechanism adopts a gas cylinder, its extension and retraction are quick and sensitive, which is suitable for a sand storage box with a smaller capacity; when the lifting mechanism adopts an oil cylinder, its extension and retraction are stable, and the lifting force is large, which is suitable for a sand storage box with a larger capacity.

[0022] In the preferred solution, the support frame is a frame structure with an opening facing upward, and the two ends of the opening are connected to the ear seat pins. The structure is simple. When in use, the support frame supports one end of the sand storage box and is connected to the ear seat pin at the bottom of the sand storage box. When the jacking mechanism lifts the sand storage box, the sand storage box rotates around the support frame, so that the sand storage box is in an inclined state.

[0023] In the preferred solution, the sand feeding box is a hollow box structure with an observation hole at the top. The structure is simple. When in use, the observation hole at the top of the sand feeding box is used to observe the amount of sand in the sand feeding box. When the amount of sand is small, the lifting mechanism is started to lift the sand storage box to inject sand into the sand feeding box.

[0024] In the preferred solution, a quicksand platform with an inclined structure is provided in the sand inlet box, and the sand discharge pump is located in the sand inlet box near the lower end of the quicksand platform. The structure is simple, and when in use, when the sand in the lower sand box enters the sand inlet box, it flows along the higher end of the quicksand platform to the lower end, so that the sand buries the pipe mouth of the sand discharge pump, thereby avoiding empty pumping when the sand discharge pump is working.

[0025] A water jet sand feeding system includes a sand storage box, a lifting mechanism, a support frame, a sand feeding box and a sand discharge pump. The sand feeding box is arranged at the lower part of one end of the sand storage box, and a sand discharge pipe is connected with the sand feeding box and the lower sand box of the sand storage box. The sand discharge pump is located in the sand feeding box. The lifting mechanism and the support frame are respectively located at the bottom of the sand storage box and connected with pins at both ends. The sand storage box is driven to rotate upward around one end of the support frame by the lifting mechanism, and the sand in the feeding sand box is discharged into the filtering sand box and the lower sand box. The finer sand in the lower sand box enters the sand feeding box from the sand discharge pipe and is discharged by the sand discharge pump. The present invention overcomes the problem that larger sand particles enter the cutting knife of the original water jet cutting equipment, reducing its service life and low cutting accuracy, and affecting the cutting quality. The present invention has the characteristics of simple structure, preventing larger sand particles from entering the sand feeding box, which is beneficial to increasing the service life of the cutting knife and improving cutting accuracy and quality, and simple and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 for Figure 1 Schematic diagram of the main view.

[0029] Figure 3 for Figure 2 Schematic diagram of the right side.

[0030] Figure 4 for Figure 2 Schematic top view of .

[0031] Figure 5 for Figure 4 Schematic diagram of the cross-sectional view at AA.

[0032] In the figure: a sand storage box 1, a discharge door 10, an ear seat 11, a first filter plate 12, a second filter plate 13, a feed sand box 14, a filter sand box 15, a lower sand box 16, a sand inlet 17, a sand outlet 18, a sand discharge pipe 19, a lifting mechanism 2, a support frame 3, a sand feed box 4, a sand discharge pump 5, an observation hole 41, a quicksand table 42, a sand discharge pipe 51, a controller 6, and a vibration pump 7. DETAILED DESCRIPTION

[0033] like Figure 1~Figure 5 A water jet sand feeding system is disclosed, which comprises a sand storage box 1, a lifting mechanism 2, a support frame 3, a sand feeding box 4 and a sand discharge pump 5; the lifting mechanism 2 and the support frame 3 are respectively connected with the ear seat 11 at the bottom of the sand storage box 1, and the sand discharge pipe 19 connected with the lower sand box 16 of the sand storage box 1 is connected with the sand feeding box 4, the sand discharge pump 5 is located at the bottom of one end of the sand feeding box 4, and the sand discharge pipe 51 extends out of the sand feeding box 4, and the sand feeding box 4 is close to the lower part of one end of the sand storage box 1; the lifting mechanism 2 drives the sand storage box 1 to rotate around one end of the support frame 3 and tilt toward one end of the sand feeding box 4. The structure is simple. A sand feeding box 4 is arranged at the lower part of one end of the sand storage box 1. A sand discharge pipe 19 is connected with the sand feeding box 4 and the lower sand box 16 of the sand storage box 1. A sand discharge pump 5 is located in the sand feeding box 4. A lifting mechanism 2 and a support frame 3 are respectively located at the bottom of the sand storage box 1 and connected by pins at both ends. The sand storage box 1 is driven to rotate upward around one end of the support frame 3 by the lifting mechanism 2. Sand grains in the feeding sand box 14 are discharged into the filtering sand box 15 and the lower sand box 16. The finer sand grains in the lower sand box 16 enter the sand feeding box 4 from the sand discharge pipe 19 and are discharged by the sand discharge pump 5, so that sand grains with larger particles are prevented from entering the sand feeding box 4. This is beneficial to prolonging the service life of the cutting knife and improving the cutting accuracy and quality. The operation is simple and convenient.

[0034] The random counter randomly gives a value greater than N or less than N (N value is 1) every S seconds (3 seconds when working). If the value given by the random counter is greater than N, the jacking mechanism 2 moves upward under the control of the controller. If the value given by the random counter is less than N, the jacking mechanism 2 moves downward under the control of the controller. When the stroke of the jacking mechanism 2 reaches the maximum stroke and cannot increase the stroke, the controller 6 sends a start signal to the vibration pump 7. When the stroke of the jacking mechanism 2 reaches the minimum stroke and cannot decrease the stroke, the controller 6 sends a start signal to the vibration pump 7. The irregular rise or fall and vibration of the jacking mechanism 2 can effectively change the position of the sand in the sand storage box 1, prevent sand from compacting, overcome the problem of lower and lower working efficiency of the sand feeding system, and improve the sorting efficiency.

[0035] In the preferred solution, the sand storage box 1 is a hollow box structure, with ears 11 arranged at both ends of the box bottom, and is divided into a feed sand box 14, a filter sand box 15 and a lower sand box 16 by a first filter plate 12 and a second filter plate 13 in the box body. The structure is simple, and when in use, the initial sand first enters the feed sand box 14, then passes through the first filter plate 12 to enter the filter sand box 15, and finally passes through the second filter plate 13 to fall into the lower sand box 16.

[0036] In a preferred solution, a sand inlet 17 is provided on one end of the upper side of the sand storage box 1 near the jacking mechanism 2 and is connected to the feeding sand box 14. The structure is simple. When in use, the initial sand enters the sand storage box 1 from the sand inlet 17. The sand inlet 17 is located on the upper side of the sand storage box 1 near the jacking mechanism 2. When the jacking mechanism 2 lifts the sand storage box 1 upward, it is conducive to the sand particles rolling to the other end of the sand storage box 1.

[0037] In a preferred solution, a sand outlet 18 is provided at one end of the lower side of the sand storage box 1 near the support frame 3 to communicate with the lower sand box 16, and the sand outlet 18 is connected to the sand discharge pipe 19. The structure is simple, and when in use, the sand in the lower sand box 16 enters the feeding sand box 14 from the sand outlet 18 along the sand discharge pipe 19 after the sand storage box 1 is tilted.

[0038] Preferably, the sand discharge pipe 19 is a hose.

[0039] In a preferred solution, the filter holes of the first filter plate 12 are larger than the filter holes of the second filter plate 13. The structure is simple. When in use, the larger sand particles are blocked by the first filter plate 12 in the feed sand box 14, the sand particles in the filter sand box 15 that are larger than the filter holes of the second filter plate 13 are blocked by the second filter plate 13 in the filter sand box 15, and the smaller sand particles pass through the second filter plate 13 and enter the lower sand box 16.

[0040] In the preferred solution, a discharge door 10 is provided on one side of the feed sand box 14 and the filter sand box 15, and the discharge door 10 is close to one end of the support frame 3. The structure is simple, and when in use, the sand particles blocked in the feed sand box 14 and the filter sand box 15 accumulate over time, so that the filtering effect is reduced. At this time, the sand particles are discharged by opening the discharge door 10; when discharging, the sand storage box 1 is lifted up by the lifting mechanism 2 to make it tilted, and the discharge door 10 is arranged at one end close to the support frame 3, which is conducive to the sand particles tilting toward this end, so that it is easy to discharge.

[0041] Preferably, the discharge door 10 is a rectangular door, and raised clamping plates are arranged on both sides of the rectangular door, and the pull-out plates and the clamping plates slide in cooperation to close the rectangular door.

[0042] In the preferred solution, the lifting mechanism 2 is a pneumatic cylinder or an oil cylinder. The structure is simple. When the lifting mechanism 2 is a pneumatic cylinder, its extension and retraction are quick and sensitive, and it is suitable for a sand storage box 1 with a smaller capacity; when the lifting mechanism 2 is a oil cylinder, its extension and retraction are stable, and the lifting force is large, and it is suitable for a sand storage box 1 with a larger capacity.

[0043] In a preferred solution, the support frame 3 is a frame structure with an opening facing upward, and the two ends of the opening are pin-connected to the ear seat 11. The structure is simple. When in use, the support frame 3 supports one end of the sand storage box 1 and is pin-connected to the ear seat 11 at the bottom of the sand storage box 1. When the lifting mechanism 2 lifts the sand storage box 1, the sand storage box 1 rotates around the support frame 3, so that the sand storage box 1 is in an inclined state.

[0044] In a preferred embodiment, the sand feeding box 4 is a hollow box structure, and an observation hole 41 is arranged at the top. The structure is simple, and when in use, the observation hole 41 at the top of the sand feeding box 4 is used to observe the amount of sand in the sand feeding box 4. When the amount of sand is small, the lifting mechanism 2 is started to lift the sand storage box 1 to inject sand into the sand feeding box 4.

[0045] In the preferred solution, a quicksand platform 42 with an inclined structure is provided in the sand inlet box 4, and the sand discharge pump 5 is located in the sand inlet box 4 near the lower end of the quicksand platform 42. The structure is simple, and when in use, when the sand in the lower sand box 16 enters the sand inlet box 4, it flows along the higher end of the quicksand platform 42 to the lower end, so that the sand buries the pipe mouth of the sand discharge pump 5, thereby avoiding empty pumping when the sand discharge pump 5 is working.

[0046] For example, when the waterjet sand feeding system is installed and used, a sand feeding box 4 is arranged at the lower part of one end of the sand storage box 1, a sand discharge pipe 19 is connected with the sand feeding box 4 and the lower sand box 16 of the sand storage box 1, a sand discharge pump 5 is located in the sand feeding box 4, a lifting mechanism 2 and a support frame 3 are respectively located at the bottom ends of the sand storage box 1 and are connected by pins, the lifting mechanism 2 drives the sand storage box 1 to rotate upward around one end of the support frame 3, and the sand in the feeding sand box 14 is discharged into the filtering sand box 15 and the lower sand box 16, and the finer sand in the lower sand box 16 enters the sand feeding box 4 from the sand discharge pipe 19 and is discharged by the sand discharge pump 5, so as to avoid sand with larger particles from entering the sand feeding box 4, which is beneficial to prolonging the service life of the cutting knife and improving the cutting accuracy and quality, and the operation is simple and convenient.

[0047] When in use, the initial sand material first enters the feed sand box 14 , then passes through the first filter plate 12 to enter the filter sand box 15 , and finally passes through the second filter plate 13 to fall into the lower sand box 16 .

[0048] When in use, initial sand enters the sand storage box 1 from the sand inlet 17, which is located on the upper side of the sand storage box 1 near one end of the jacking mechanism 2. When the jacking mechanism 2 lifts the sand storage box 1 upward, it is beneficial for the sand particles to roll to the other end of the sand storage box 1.

[0049] When in use, the sand in the lower sand box 16 enters the feeding sand box 14 from the sand outlet 18 along the sand discharge pipe 19 after the sand storage box 1 is tilted.

[0050] When in use, larger sand particles are blocked by the first filter plate 12 in the feed sand box 14, sand particles in the filter sand box 15 that are larger than the filter holes of the second filter plate 13 are blocked by the second filter plate 13 in the filter sand box 15, and smaller sand particles pass through the second filter plate 13 and enter the lower sand box 16.

[0051] During use, the sand particles blocked in the feed sand box 14 and the filter sand box 15 accumulate over time, reducing their filtering effect. At this time, the sand particles are discharged by opening the discharge door 10. When discharging, the sand storage box 1 is lifted up by the lifting mechanism 2 to make it inclined. The discharge door 10 is arranged at one end close to the support frame 3, which is conducive to the sand particles tilting toward this end for easy discharge.

[0052] When the lifting mechanism 2 adopts an air cylinder, its extension and retraction are quick and sensitive, and it is suitable for a sand storage box 1 with a smaller capacity; when the lifting mechanism 2 adopts an oil cylinder, its extension and retraction are stable, and the lifting force is large, and it is suitable for a sand storage box 1 with a larger capacity.

[0053] When in use, the support frame 3 supports one end of the sand storage box 1 and is pin-connected to the ear seat 11 at the bottom of the sand storage box 1. When the jacking mechanism 2 lifts the sand storage box 1, the sand storage box 1 rotates around the support frame 3, so that the sand storage box 1 is in an inclined state.

[0054] When in use, the observation hole 41 located at the top of the sand feeding box 4 is used to observe the amount of sand in the sand feeding box 4. When the amount of sand is small, the lifting mechanism 2 is started to lift the sand storage box 1 to inject sand into the sand feeding box 4.

[0055] During use, when the sand in the lower sand box 16 enters the sand inlet box 4, it flows along the higher end of the quicksand table 42 to the lower end, so that the sand buries the nozzle of the sand discharge pump 5, thereby avoiding empty pumping when the sand discharge pump 5 is working. The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of this application can be arbitrarily combined with each other if there is no conflict. The protection scope of the present invention shall be the technical solution recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solution recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A waterjet cutting sand feeding system, characterized by: It comprises a sand storage box (1), a lifting mechanism (2), a support frame (3), a sand feeding box (4) and a sand discharge pump (5); the lifting mechanism (2) and the support frame (3) are respectively connected to the ear seat (11) at the bottom of the sand storage box (1) through a pin shaft; a sand discharge pipe (19) connected to the lower sand box (16) of the sand storage box (1) is connected to the sand feeding box (4); the sand discharge pump (5) is located at the bottom of one end of the sand feeding box (4); the sand discharge pipe (51) extends out of the sand feeding box (4); the sand feeding box (4) is close to the lower part of one end of the sand storage box (1); the lifting mechanism (2) drives the sand storage box (1) to rotate around one end of the support frame (3) and tilt toward one end of the sand feeding box (4); The lifting mechanism (2) is connected to the controller (6), a vibration pump (7) is provided on the surface of the sand storage box (1), the controller (6) is connected to the vibration pump (7), and the controller (6) is connected to a random counter; The random counter randomly gives a value greater than N or less than N every S seconds. If the value given by the random counter is greater than N, the lifting mechanism (2) moves upward under the control of the controller. If the value given by the random counter is less than N, the lifting mechanism (2) moves downward under the control of the controller. When the stroke of the lifting mechanism (2) reaches the maximum stroke and cannot be increased, the controller (6) sends a start signal to the vibration pump (7). When the stroke of the lifting mechanism (2) reaches the minimum stroke and cannot be reduced, the controller (6) sends a start signal to the vibration pump (7).

2. The waterjet cutting sand feeding system according to claim 1 is characterized by: The sand storage box (1) is a hollow box structure, with ear seats (11) arranged at both ends of the box bottom, and is located inside the box body and is divided into a feed sand box (14), a filter sand box (15) and a lower sand box (16) by a first filter plate (12) and a second filter plate (13).

3. The waterjet cutting sand feeding system according to claim 2 is characterized by: A sand inlet (17) is provided at one end of the upper side of the sand storage box (1) close to the jacking mechanism (2) and is connected to the feeding sand box (14).

4. The waterjet cutting sand feeding system according to claim 2 is characterized by: A sand outlet (18) is provided at one end of the lower side of the sand storage box (1) close to the support frame (3) and is connected to the lower sand box (16), and the sand outlet (18) is connected to the sand discharge pipe (19).

5. The waterjet cutting sand feeding system according to claim 2 is characterized by: The filter holes of the first filter plate (12) are larger than the filter holes of the second filter plate (13).

6. The waterjet sand feeding system according to claim 2 is characterized by: A discharge door (10) is provided on one side of the feed sand box (14) and the filter sand box (15), and the discharge door (10) is close to one end of the support frame (3).

7. The waterjet cutting sand feeding system according to claim 1 is characterized by: The lifting mechanism (2) is a gas cylinder or an oil cylinder.

8. The waterjet cutting sand feeding system according to claim 1 is characterized by: The support frame (3) is a frame structure with an opening facing upward, and the two ends of the opening are pin-connected to the ear seats (11).

9. The waterjet cutting sand feeding system according to claim 1 is characterized by: The sand feeding box (4) is a hollow box structure, and an observation hole (41) is arranged at the top.

10. The waterjet cutting sand feeding system according to claim 9, characterized in that: The sand feeding box (4) is provided with a quicksand platform (42) with an inclined structure, and the sand discharge pump (5) is located in the sand feeding box (4) at a lower end close to the quicksand platform (42).

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