Desktop-level water cutting machine

Abstract

The utility model discloses a desktop-level water-jet cutting machine, which relates to the technical field of water-jet cutting machines, solves the technical problem that the existing cutting machine is large in size and cannot adjust abrasive flow, and comprises a cutting machine device and a water pump device, and the input end of the cutting machine device is connected with the output end of the water pump device. The cutting machine equipment comprises a cutting machine frame, a material frame is installed in the cutting machine frame, a tool bit control structure is installed on the cutting machine frame, accumulation of magnetic suspended solids can be effectively reduced, waste materials are prevented from being accumulated in the equipment, abrasion is reduced, and the service life of the equipment is prolonged; operation and maintenance are more convenient, and a user can easily perform observation and maintenance operation; a user can accurately adjust the flow and the negative pressure of the water jet so as to adapt to different cutting requirements, and the working efficiency is improved; machining parts can be conveniently fixed and replaced, and maintenance work is reduced.

Description

Technical Field

[0001] This utility model relates to the field of waterjet cutting machine technology, specifically a desktop waterjet cutting machine. Background Technology

[0002] This utility model relates to the technical field of waterjet cutting machines, which are devices that use high-pressure water jets and abrasives to cut materials. This technology is widely used and mature, offering the advantages of cold cutting and avoiding thermal stress deformation of materials. Currently, the most popular waterjet cutting machines on the market are large CNC platform machines with cutting pressures of approximately 380 MPa, power exceeding 40 kW, and requiring 380V AC power, suitable for large-scale and mass production. Compared to large CNC platform machines, desktop waterjet cutting machines are more suitable for small-scale and small-batch production, particularly suitable for laboratories and educational institutions. These machines have a small footprint, low energy consumption, and lower maintenance costs.

[0003] Currently, there is a lack of mature desktop waterjet cutting machines on the market, and their technology has the following characteristics: During the cutting process, the abrasive and residue carried by the water jet accumulate in the water tank. The current solution is to use a water pump to extract the accumulated material from the water tank and draw it into a collection box through negative pressure, but this will affect the service life of the water pump; the water jet relies on the negative pressure formed by the sapphire nozzle to draw in the abrasive, but the abrasive flow rate cannot be adjusted; the honeycomb panel in the water tank is used to fix parts, but this panel is easily damaged by high-pressure water, and once damaged, it will scatter into the water tank; when the water jet cuts the honeycomb panel, it may further damage the bottom plate of the water tank; the pump set is relatively large, which occupies a lot of space; in addition, this type of waterjet cutting machine requires three-phase industrial power of 380V or higher, which limits its application.

[0004] Existing cutting machines have a technical problem where the abrasive flow rate cannot be adjusted for larger sizes. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a desktop waterjet cutting machine that solves the technical problem that existing cutting machines cannot adjust the abrasive flow rate for large-sized objects.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A desktop waterjet cutting machine, comprising a cutting machine and a water pump. The input end of the cutting machine is connected to the output end of the water pump. The cutting machine includes a cutting frame, a material rack installed inside the cutting frame, a cutter head control structure installed on the cutting frame, and a waterjet cutting cutter head installed on the cutter head control structure. A water tank is installed on the rear wall of the cutting frame, consisting of a main tank and a secondary tank connected together. A filter screen is installed at the connection point. The filter screen is insertable and made of a magnetic material, with a magnet directly adsorbing onto it. The secondary tank is located at the bottom. Designed for a sloping surface, it buffers water flow and prevents waste accumulation. High and low level sensors are installed in the auxiliary water tank, and the water level changes within the sensor's range. A baffle plate, in an insert type, is installed between the sensor and the water inlet to block suspended solids in the water. A filter is installed at the water pump inlet. The water cutting head is connected to the water tank output. A sand box is installed inside the cutting frame. The water pump outlet is connected to a venturi block. Parallel pipelines are connected to the inlet and outlet of the venturi block, and regulating valves are installed on these pipelines. By changing the switching of these regulating valves, the bypass flow rate is controlled, thereby adjusting the water flow rate into the venturi block, creating a suitable negative pressure to draw waste from the main water tank.

[0007] Preferably, the water pump equipment includes a water pump motor, a high-pressure plunger pump, an upper bracket, and a lower bracket. An adjusting screw is installed between the upper bracket and the lower bracket. The water pump motor is fixedly installed on the upper bracket, and the high-pressure plunger pump is fixedly installed on the lower bracket. A transmission unit is connected between the water pump motor and the high-pressure plunger pump. The output end of the plunger pump is connected to the input end of the water tank.

[0008] Preferably, the transmission unit includes a driving pulley and a driven pulley. The driving pulley is fixedly installed on the drive end of the water pump motor, and the driven pulley is fixedly installed on the power input end of the plunger pump. A transmission belt connects the driving pulley and the driven pulley. The pump unit uses a motor to drive the high-pressure plunger pump to achieve a 31.5 MPa high-pressure water output. The motor uses a household 220V single-phase AC power supply. After the high-pressure water enters the mixing chamber, it forms a negative pressure to draw abrasive from the abrasive box, ultimately achieving material cutting and processing. The pump unit motor is arranged on the upper bracket, and the plunger pump is arranged on the lower bracket. The upper and lower brackets are connected by a long screw, and the synchronous belt is tightened by adjusting the height of the screw.

[0009] Preferably, the cutter head control structure includes a support base, which is fixedly installed on the upper wall of the cutting machine frame. An optical axis is connected between the support bases, and a crossbeam is slidably connected between the optical axes. A water jet holder is slidably installed on the crossbeam, and the water jet cutting head is fixedly installed on the water jet holder.

[0010] Preferably, a longitudinal motor is fixedly mounted on the support base, a longitudinal pulley is fixedly mounted on the drive end of the longitudinal motor, a longitudinal guide wheel is fixedly mounted on the support base, a longitudinal belt connects the longitudinal pulley and the longitudinal guide wheel, and the longitudinal belt is fixedly connected to the crossbeam. Y-axis: A linear bearing is mounted on the movable seat, sliding on the optical axis. One side of the optical axis is connected to the support base, and the other side is connected to the motor seat. The motor seat is connected to another support base. The movable seat and the fixed seat are designed with annular grooves. A soft rubber bellows cover directly snaps into the groove to seal all mechanisms. The motor drives the movable seat vertically downwards via a synchronous belt. The limit sensor is fixed on the optical axis via a sensor bracket.

[0011] Preferably, a transverse motor is fixedly installed on the water jet holder, a transverse guide wheel is installed on the drive end of the transverse motor, a transverse belt is fixedly installed between the crossbeams, the transverse guide wheel is connected to the transverse belt, a motor is installed on the movable seat, the motor has a vertically downward output shaft, tension wheels are designed on both sides of the motor, the motor drives the synchronous pulley to move along the synchronous belt, the optical shaft is connected to the two side support seats by a transition flange, the support seats are designed with wire passage holes, the cutter head and cutter bar are fixed on the X-beam movable seat, the fixed base is bolted to the movable seat, the fixed base is machined with a cutter bar hole and a clamping hole in the middle, a clamping block is placed in the clamping hole, one end of the clamping block is arc-shaped and the other end is conical, after rotating the nut, the clamping block is squeezed to contact the cutter bar, and the cutter bar is fixed by friction.

[0012] Preferably, the lower end of the sand box is connected to a sand control valve, and the output end of the sand control valve is equipped with a regulating valve. The output end of the regulating valve is connected to the input end of the waterjet cutting blade. The abrasive box has a pull-out structure, with slide rails fixed on both sides of the abrasive box. The abrasive box is installed on the lower side of the equipment and fixed to the water tank column. A transparent viewing window is designed on the outside of the abrasive box to observe the material level inside. The abrasive box adopts a stepped structure, with a discharge port installed on the stepped facade. A wear-resistant alloy bushing is installed on the inner side of the discharge port, and a sealing ring is installed on the outer side. The discharge port of the abrasive box is connected to a flow regulating valve. The main body of the flow regulating valve is a reducing pipe with branch lines. An air control valve is installed on each branch line. The air control valve adjusts the airflow rate, thereby changing the amount of abrasive discharged. The outlet of the flow regulating valve is connected to a No. 1 silicone tube. The opening and closing of the No. 1 and No. 2 silicone tubes are controlled by a double-way clamp valve. The outlet of the No. 2 silicone tube is directly connected to the atmosphere. The two silicone tubes merge into one at the outlet and enter the blade mixing valve.

[0013] Preferably, the material rack is a grating plate, and the material rack has baskets at both ends. The baskets have handles. The material support platform includes an integral grating plate and baskets. The bottom of the basket is a mesh plate. The mesh plate is surrounded by a ring guardrail and longitudinal guardrails. The longitudinal guardrails have a guiding function. When the integral grating plate is installed, it can slide into the basket along the longitudinal guardrails. The upper ends of the longitudinal guardrails on both sides are closed, which also serves as a handle function.

[0014] Beneficial effects

[0015] This invention provides a desktop waterjet cutting machine that effectively reduces the accumulation of magnetic suspended matter, prevents equipment buildup, reduces wear, and extends equipment life. It also makes operation and maintenance more convenient, allowing users to easily observe and perform maintenance. Users can precisely adjust the water jet flow rate and negative pressure to adapt to different cutting needs and improve work efficiency. The machine allows for easy fixing and replacement of parts, reducing maintenance work. The sealed design and rigid connection method minimize space waste between components, resulting in a small pump unit footprint. The compact layout also reduces difficulties in maintenance and relocation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of a desktop waterjet cutting machine according to the present invention.

[0017] Figure 2 This is a front cross-sectional view of the desktop waterjet cutting machine described in this utility model.

[0018] Figure 3 This is a front cross-sectional view of the desktop waterjet cutting machine described in this utility model.

[0019] Figure 4 This is a side view of the desktop waterjet cutting machine described in this utility model.

[0020] Figure 5 This is a top view of the desktop waterjet cutting machine described in this utility model.

[0021] Figure 6 This is a side view of the desktop waterjet cutting machine described in this utility model.

[0022] In the diagram: 1. Cutting frame; 2. Material rack; 3. Waterjet cutting head; 4. Water tank; 5. Sand box; 6. Water pump motor; 7. High-pressure plunger pump; 8. Upper bracket; 9. Lower bracket; 10. Adjusting screw; 11. Driving pulley; 12. Driven pulley; 13. Drive belt; 15. Support base; 16. Optical shaft; 17. Crossbeam; 18. Waterjet holder; 19. Longitudinal motor; 20. Longitudinal pulley; 21. Longitudinal guide wheel; 22. Longitudinal belt; 23. Transverse motor; 24. Transverse guide wheel; 25. Transverse belt; 26. Sand control valve; 27. Regulating valve; 28. Basket; 29. ​​Handle; Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Detailed description follows.

[0024] Please see Figure 1-6 This utility model provides a technical solution: a desktop waterjet cutting machine, including a cutting machine and a water pump. The input end of the cutting machine is connected to the output end of the water pump. The cutting machine includes a cutting frame 1, a material rack 2 installed inside the cutting frame 1, a cutter head control structure installed on the cutting frame 1, and a waterjet cutting cutter head 3 installed on the cutter head control structure. A water tank 4 is installed on the rear wall of the cutting frame 1. The water tank 4 is divided into a main water tank and a secondary water tank 4 connected together. A filter screen is installed at the connection position. The filter screen is of insert type and is made of magnetic material, with magnets directly adsorbed onto the filter screen. The bottom of the secondary water tank 4 is designed with a slope. It can buffer water flow and prevent waste accumulation. High and low liquid level sensors are arranged in the auxiliary water tank 4. The water level changes within the range of the sensors. A baffle plate is installed between the sensor and the water inlet. The baffle plate is in the insert form to block suspended solids in the water. A filter is installed at the water pump inlet. The water cutting head is connected to the output end of the water tank 4. A sand box 5 is installed in the cutting frame 1. The water pump outlet is connected to the Venturi block. The inlet and outlet of the Venturi block are connected in parallel pipelines. A regulating valve 27 is installed on the pipeline. By changing the switch of the regulating valve 27, the bypass flow is controlled, thereby adjusting the water flow into the Venturi block, so that the Venturi block generates a suitable negative pressure to suck up the waste in the main water tank 4.

[0025] In this embodiment, the water pump equipment includes a water pump motor 6, a high-pressure plunger pump 7, an upper bracket 8, and a lower bracket 9. An adjusting screw 10 is installed between the upper bracket 8 and the lower bracket 9. The water pump motor 6 is fixedly installed on the upper bracket 8, and the high-pressure plunger pump 7 is fixedly installed on the lower bracket 9. A transmission unit is connected between the water pump motor 6 and the high-pressure plunger pump 7. The output end of the plunger pump is connected to the input end of the water tank 4.

[0026] In this embodiment, the transmission unit is further configured such that the driving pulley 11 includes a driving pulley 11 and a driven pulley 12. The driving pulley 11 is fixedly installed on the driving end of the water pump motor 6, and the driven pulley 12 is fixedly installed on the power input end of the plunger pump. The driving pulley 11 and the driven pulley 12 are connected by a transmission belt 13. The pump group uses a motor to drive the high-pressure plunger pump 7 to achieve a high-pressure water output of 31.5 MPa. The motor is powered by a household 220V single-phase AC power supply. After the high-pressure water enters the mixing chamber, it forms a negative pressure to suck up the abrasive in the abrasive box, and finally realizes the material cutting and processing. The pump group motor is arranged on the upper bracket 8, and the plunger pump is arranged on the lower bracket 9. The upper and lower brackets are connected by a long screw, and the synchronous belt is tightened by adjusting the height of the screw 10.

[0027] In this embodiment, the cutter head control structure includes a support base 15, which is fixedly installed on the upper wall of the cutting machine frame 1. An optical axis 16 is connected between the support bases 15, and a crossbeam 17 is slidably connected between the optical axes 16. A water jet holder 18 is slidably installed on the crossbeam 17, and the water jet cutting head 3 is fixedly installed on the water jet holder 18.

[0028] In this embodiment, a longitudinal motor 19 is fixedly installed on the support base, a longitudinal pulley 20 is fixedly installed on the drive end of the longitudinal motor 19, a longitudinal guide wheel 21 is fixedly installed on the support base, a longitudinal belt 22 is connected between the longitudinal pulley 20 and the longitudinal guide wheel 21, and the longitudinal belt 22 is fixedly connected to the crossbeam 17. For the Y-axis: a linear bearing is installed on the movable seat and slides on the optical axis 16. One side of the optical axis 16 is connected to the support base 15, and the other side is connected to the motor seat. The motor seat is connected to another support base 15. The movable seat and the fixed seat are designed with annular grooves. A soft rubber bellows cover is directly inserted into the groove to seal all the mechanisms. The motor drives the movable seat vertically downwards via a synchronous belt. The limit sensor is fixed on the optical axis 16 via a sensor bracket.

[0029] In this embodiment, a transverse motor 23 is fixedly installed on the water jet holder 18. A transverse guide wheel 24 is installed on the driving end of the transverse motor 23. A transverse belt 25 is fixedly installed between the crossbeams 17. The transverse guide wheel 24 is connected to the transverse belt 25. A motor is installed on the movable seat. The motor has a vertically downward shaft. Expansion wheels are designed on both sides of the motor. The motor drives the synchronous wheel to move along the synchronous belt. The optical shaft 16 is connected to the two side support seats 15 using transition flanges. The support seat 15 has a wire passage hole inside. The cutter head and cutter bar are fixed on the X-beam movable seat. The fixed base is bolted to the movable seat. A cutter bar hole and a clamping hole are machined in the middle of the fixed base. A clamping block is placed in the clamping hole. One end of the clamping block is arc-shaped and the other end is conical. After rotating the nut, the clamping block is squeezed to contact the cutter bar, and the cutter bar is fixed by friction.

[0030] In this embodiment, the sand box 5 is further configured with a sand control valve 26 connected to its lower end. A regulating valve 27 is installed at the output end of the sand control valve 26, and the output end of the regulating valve 27 is connected to the input end of the waterjet cutting blade. The abrasive box has a pull-out structure, with slide rails fixed to both sides. The abrasive box is installed on the lower side of the equipment and fixed to the column of the water tank 4. A transparent viewing window is designed on the outside of the abrasive box to observe the material level inside. The abrasive box adopts a stepped structure, with a discharge port installed on the stepped facade. A wear-resistant alloy bushing is installed inside the discharge port, and a sealing ring is installed on the outside. The discharge port of the abrasive box is connected to a flow regulating valve 27. The main body of the flow regulating valve 27 is a reduced-diameter pipe with branch lines. Air control valves are installed on the branch lines to adjust the airflow rate, thereby changing the amount of abrasive discharged. The outlet of the flow regulating valve 27 is connected to a #1 silicone tube, and the opening and closing of the #1 and #2 silicone tubes are controlled by a double-pinch valve. The outlet of the #2 silicone tube is directly connected to the atmosphere. The two silicone tubes merge into one at the outlet and enter the cutter head sand mixing valve.

[0031] In this embodiment, the material rack 2 is a grating plate, and the material rack 2 has baskets 28 at both ends. Each basket has a handle 29. The material support platform includes an integral grating plate and baskets 28. The bottom of the basket 28 is a mesh plate. The mesh plate is surrounded by a ring guardrail and longitudinal guardrails. The longitudinal guardrails have a guiding function. When the integral grating plate is installed, it can slide into the basket 28 along the longitudinal guardrails. The upper ends of the longitudinal guardrails on both sides are closed, which also serves as a handle.

[0032] Its detailed connection methods are well-known technologies in this field; such as Figure 1-6 As shown, the cutting machine equipment internally includes a cutting frame 1, a cutter head control structure, and a waterjet cutting head 3. The waterjet cutting head 3 is connected to the output end of the water tank 4 for cutting operations. The water tank 4 is installed behind the cutting frame 1, consisting of a main water tank 4 and a secondary water tank 4, which are connected by a filter screen at a connection point. The secondary water tank 4 has a sloping bottom design to buffer the water flow and prevent waste accumulation. High and low level sensors are installed inside the secondary water tank 4, and a baffle plate is installed to block suspended solids in the water. The cutting machine equipment also includes a sand box 5, with the water pump outlet connected to a venturi block. By controlling the water flow rate in the venturi block, appropriate negative pressure is achieved to suck up waste from the main water tank 4. The water pump equipment includes a water pump motor 6 and a high-pressure plunger pump 7, which are connected together via a transmission unit to output high-pressure water to the water tank 4 for cutting. The pump unit uses a household 220V single-phase AC power supply; the support base 15 in the cutter head control structure is associated with the optical axis 16, the crossbeam 17 and the waterjet cutting head 3 to achieve precise control of the cutter head; the material rack 2 adopts a grid plate design and is equipped with a basket 28 to provide a stable material support platform; users can adjust the operation of the water pump and the working status of the cutting machine by operating the control panel of the water pump and the cutting machine to meet the material cutting and processing needs.

[0033] This equipment is a cutting machine that uses high-pressure water jets. The water jet generated by the high-pressure pump creates negative pressure in the mixing chamber of the cutter head, drawing in the abrasive and mixing it with the high-pressure water to form an abrasive water jet. This abrasive water jet has impact force and can cut materials. The auxiliary water tank 4 is designed to buffer the water flow and contains sensors, multi-stage filters, and a suction port. The main water tank 4 stores water and includes a waste collection box with a waste suction port at the bottom. The main and auxiliary water tanks 4 are interconnected by openings to facilitate water flow between the two tanks. The water level in tank 4 is monitored by sensors; when the water level reaches a set threshold, a solenoid valve opens or closes to regulate the water level. Waste materials, including suspended solids, garnet sand, and iron filings, are effectively removed by filters and magnetic filters to remove magnetism and other impurities.

[0034] The abrasive waterjet passes through a throttle valve and a venturi valve to regulate the sand intake and discharge flow rate. The sand box 5 is designed with a stepped structure and side discharge, equipped with a transparent window to observe the sand volume. Both the sand box 5's discharge port and the cutter head's inlet are equipped with sealing rings and wear-resistant rings. The sand control valve 26 adjusts the sand intake by regulating the air intake, while the waterjet head uses a clamp valve to pump sand during operation. The synchronous belt motor is fixed to the upper mounting bracket, and the water pump is fixed to the lower mounting bracket. The distance between the mounting brackets and the tension of the synchronous belt can be adjusted by adjusting the screw 10 and the double-layered anti-loosening shims. The entire device features a compact design for easy operation and maintenance.

[0035] The inlet pipe connects to the pump unit's inlet, and the water enters the high-pressure water pump after passing through a filter. The high-pressure water pump is connected to the motor via a synchronous pulley and synchronous belt. The high-pressure water pressure is regulated by a safety valve and a pressure regulating valve, and the overflow water returns to the inlet pipe through the overflow port of the pressure regulating valve. The equipment uses multiple sensors and control valves to achieve precise control and monitoring of the water flow. The towel is fixed on the Y-beam shaft and connected to the optical axis 16. The X-axis uses a motor and linear bearings to move the cutter head for cutting operations.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A desktop waterjet cutting machine, comprising a cutting machine and a water pump, characterized in that, The input end of the cutting machine is connected to the output end of the water pump. The cutting machine includes a cutting frame (1), a material rack (2) is installed inside the cutting frame (1), a cutter head control structure is installed on the cutting frame (1), a water cutting cutter head (3) is installed on the cutter head control structure, a water tank (4) is installed on the rear wall of the cutting frame (1), the water cutting cutter head is connected to the output end of the water tank (4), and a sand box (5) is installed inside the cutting frame (1).

2. The desktop waterjet cutting machine according to claim 1, characterized in that, The water pump equipment includes a water pump motor (6) and a high-pressure plunger pump (7), an upper bracket (8) and a lower bracket (9). An adjusting screw (10) is installed between the upper bracket (8) and the lower bracket (9). The water pump motor (6) is fixedly installed on the upper bracket (8), and the high-pressure plunger pump (7) is fixedly installed on the lower bracket (9). A transmission part is connected between the water pump motor (6) and the high-pressure plunger pump (7). The output end of the plunger pump is connected to the input end of the water tank (4).

3. A desktop waterjet cutting machine according to claim 2, characterized in that, The transmission unit includes a driving pulley (11) and a driven pulley (12). The driving pulley (11) is fixedly installed on the driving end of the water pump motor (6), and the driven pulley (12) is fixedly installed on the power input end of the plunger pump. A transmission belt (13) connects the driving pulley (11) and the driven pulley (12).

4. A desktop waterjet cutting machine according to claim 1, characterized in that, The cutter head control structure includes a support base (15), which is fixedly installed on the upper wall of the cutting frame (1). Optical shafts (16) are connected between the support bases (15), and a crossbeam (17) is slidably connected between the optical shafts (16). A water jet holder (18) is slidably installed on the crossbeam (17), and the water jet cutting head (3) is fixedly installed on the water jet holder (18).

5. A desktop waterjet cutting machine according to claim 4, characterized in that, A longitudinal motor (19) is fixedly installed on the support base. A longitudinal pulley (20) is fixedly installed on the drive end of the longitudinal motor (19). A longitudinal guide wheel (21) is fixedly installed on the support base. A longitudinal belt (22) is connected between the longitudinal pulley (20) and the longitudinal guide wheel (21). The longitudinal belt (22) is fixedly connected to the crossbeam (17).

6. A desktop waterjet cutting machine according to claim 4, characterized in that, A transverse motor (23) is fixedly installed on the water jet holder (18). A transverse guide wheel (24) is installed on the drive end of the transverse motor (23). A transverse belt (25) is fixedly installed between the crossbeams (17). The transverse guide wheel (24) is connected to the transverse belt (25).

7. A desktop waterjet cutting machine according to claim 1, characterized in that, The lower end of the sand box (5) is connected to a sand control valve (26), and the output end of the sand control valve (26) is equipped with a regulating valve (27), and the output end of the regulating valve (27) is connected to the input end of the waterjet cutting blade.

8. A desktop waterjet cutting machine according to claim 1, characterized in that, The material rack (2) is a grid plate, and baskets (28) are provided at both ends of the material rack (2), and the baskets are provided with handles (29).

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