A new sandblasting device for photovoltaic frame surface treatment

Abstract

The present invention discloses a novel sandblasting device for surface treatment of photovoltaic frames, and relates to the technical field of photovoltaic frame production. The present invention includes a sandblasting chamber, and a conveying device is fixed to the feed port and the discharge port of the sandblasting chamber, and the conveying device includes a bracket, and an upper conveyor belt and a lower conveyor belt are respectively provided at the upper and lower parts of the bracket, and a group of material guide components are fixed at the top of the upper conveyor belt and the lower conveyor belt and at one end away from the sandblasting chamber, and the material guide component includes an inverted U-shaped plate and a plurality of limiters. The present invention designs a double-layer conveying conveying device for feeding and discharging in the sandblasting chamber, and at the same time, a side sandblasting part, a first sandblasting part and a second sandblasting part matching the double-layer conveying device are designed in the sandblasting chamber, which can simultaneously and stably sandblast the side wall, top surface and bottom surface of the frame transmitted by the conveying device, thereby solving the problem that the existing sandblasting machine is not easy to sandblast and the sandblasting is uneven on the side and bottom surfaces of the frame.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic frame production, and in particular relates to a novel sandblasting device for photovoltaic frame surface treatment. Background Art

[0002] The existing sandblasting machine consists of a sandblasting chamber and a transmission device, and a reciprocating swinging sandblasting device is arranged in the sandblasting chamber. For the sandblasting of the frame, a plurality of frames are usually placed side by side on the transmission device and simultaneously input into the sandblasting chamber for sandblasting.

[0003] For frames placed side by side, the spacing between frames will be small, making it difficult to sandblast the side walls of the frames. It is also not conducive to sandblasting the bottom surface of the frames after they are placed, which will cause uneven sandblasting on the frame surface and affect the sandblasting effect of the sandblasting machine on the photovoltaic frames.

[0004] The nozzle of the existing sandblasting machine swings in an arc shape in the sandblasting room, and the distance between the nozzle and the frame on the transmission device is not constant. The frame located in the center of the sandblasting room is subjected to strong sandblasting treatment, while the frames located on both sides of the sandblasting room are subjected to weak sandblasting treatment, which will cause the problem of poor sandblasting effect.

[0005] Existing sandblasting machines mostly use roller conveyor belts or hollow belt conveyor belts to transport materials. Due to the long length of the frame, it is not easy to limit the movement trajectory of the frame during transportation, and the frame is prone to deviation during transportation. Manual assistance is often required at the end of the sandblasting machine, wasting manpower and material resources. Summary of the invention

[0006] The purpose of the present invention is to provide a new type of sandblasting device for photovoltaic frame surface treatment. By designing a double-layer conveying conveying device for feeding and discharging materials in a sandblasting chamber, a side sandblasting part, a first sandblasting part and a second sandblasting part matching the double-layer conveying device are designed in the sandblasting chamber, which can simultaneously and stably sandblast the side walls, top surfaces and bottom surfaces of the frame transmitted by the conveying device, thereby solving the problem that the existing sandblasting machine is difficult to sandblast and the sandblasting is uneven on the side and bottom surfaces of the frame.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention is a novel sandblasting device for surface treatment of photovoltaic frames, comprising a sandblasting chamber, wherein a feeding port and a discharging port of the sandblasting chamber are both fixed with a conveying device;

[0009] The conveying device comprises a bracket, wherein an upper conveyor belt and a lower conveyor belt are respectively arranged at the upper and lower parts of the bracket, and a group of material guide components are fixed at the top of the upper conveyor belt and the lower conveyor belt and at one end away from the sandblasting chamber;

[0010] The material guiding assembly includes an inverted U-shaped plate and a plurality of limiting members;

[0011] The inverted U-shaped plate is fixed to the top of both sides of the bracket through flange plates and screws, and a sliding groove is provided on the inverted U-shaped plate;

[0012] The limiter comprises a shell, the shell is fixed on the top of the inverted U-shaped plate, a double-headed screw is rotatably connected in the shell, both ends of the double-headed screw are threadedly connected with sliders, the slider is located in the shell and slidably connected with the shell, an opening is opened at the bottom of the shell, a sliding rod is fixed at the bottom of the slider, one end of the sliding rod passes through the opening and the sliding groove and is rotatably connected with a rubber wheel, and one end of the double-headed screw passes through one side of the shell and is fixed with a handle;

[0013] The plurality of position-limiting members on the upper conveyor belt and the plurality of position-limiting members on the lower conveyor belt are distributed alternately;

[0014] A group of fixing plates are fixed on the top and bottom of one side of the sandblasting chamber, and a plurality of side sandblasting parts are fixed side by side between the fixing plates. The plurality of side sandblasting parts are respectively opposite to the plurality of limiters on the upper conveyor belt and the lower conveyor belt;

[0015] The side sandblasting part comprises a group of vertical rods, the top ends of the vertical rods are fixed in the fixed plate, one end of the vertical rods is obliquely fixed with a first nozzle, and the group of first nozzles on the side sandblasting part are arranged oppositely;

[0016] Fixed beams are fixed to the top and bottom of the other side of the sandblasting chamber, and a plurality of first sandblasting parts and a plurality of second sandblasting parts are fixed to one side of a group of the fixed beams at intervals, and the structural features of the second sandblasting parts are the same as those of the first sandblasting parts, and the second sandblasting parts are invertedly installed on one side of a group of the fixed beams;

[0017] The first sandblasting part includes a long rod body and a short rod body, and a second nozzle is fixed at one end of the long rod body and the short rod body. The second nozzles on the long rod body and the short rod body are arranged opposite to each other, and a gap is formed between the second nozzles on the long rod body and the short rod body. The gaps on the first sandblasting part and the second sandblasting part are respectively opposite to the position of the limit parts on the upper conveyor belt and the lower conveyor belt.

[0018] Furthermore, the upper conveyor belt comprises a plurality of transmission rollers, which are arranged side by side in a bracket, and a hollow belt body is connected to the transmission of the plurality of transmission rollers. The structural features of the lower conveyor belt are the same as those of the upper conveyor belt.

[0019] Furthermore, a plurality of guide rollers are rotatably connected side by side at the upper and lower parts of the sandblasting chamber, the upper surfaces of the guide rollers at the upper part of the sandblasting chamber are flush with the upper surface of the upper conveyor belt, and the upper surfaces of the guide rollers at the lower part of the sandblasting chamber are flush with the upper surface of the lower conveyor belt.

[0020] Furthermore, the length of the lower conveyor belt is greater than that of the upper conveyor belt, and the difference is in the range of 30-50 cm. The lower conveyor belt and the upper conveyor belt are flush with one end close to the sandblasting chamber.

[0021] Furthermore, a motor is fixed to the lower part of one side of the bracket through a mounting seat, a pulley is fixed to one end of one of the transmission rollers on the upper conveyor belt and the lower conveyor belt, belts are connected to the two pulleys for transmission, and the motor is fixedly connected to the pulley axis on the lower conveyor belt.

[0022] Furthermore, a protective shell is fixed on the outside of the bracket, and a group of pulleys and belts are located in the protective shell.

[0023] Furthermore, the widths of the feed port and the discharge port on the sandblasting chamber are the same as the width of the bracket, and a barrier curtain is fixed on the upper inner part of the feed port and the discharge port.

[0024] Furthermore, it also includes a sand storage bin and an air compressor, the feed ends on the first nozzles and the second nozzles are connected to the sand storage bin through pipelines and a pump body, and the air intake ends on the first nozzles and the second nozzles are connected to the air compressor through pipelines and a valve body.

[0025] Furthermore, a collecting hopper is provided at the bottom of the sandblasting chamber, a recovery pipe is provided on the collecting hopper, and a switch valve is provided on the recovery pipe.

[0026] Furthermore, a plurality of legs are fixed at the bottom of the bracket, a plurality of columns are fixed at the peripheral side of the sandblasting chamber, and the bottom ends of the columns are flush with the bottom ends of the legs.

[0027] The present invention has the following beneficial effects:

[0028] 1. The present invention designs a double-layer conveying device for feeding and discharging materials in the sandblasting room. At the same time, side sandblasting parts, first sandblasting parts and second sandblasting parts matching the double-layer conveying device are designed in the sandblasting room, which can stably sandblast the side walls, top surfaces and bottom surfaces of the frame transmitted by the conveying device at the same time, and can sandblast the frame uniformly and efficiently, avoiding the situation that the existing sandblasting machine is difficult to sandblast and the sandblasting is uneven on the side and bottom surfaces of the frame, and can greatly improve the sandblasting effect of the frame without affecting the sandblasting efficiency.

[0029] 2. The present invention installs a material guide assembly on the conveying device and designs a new type of limiter to limit the movement trajectory of the frame, thereby avoiding the problem of difficult transmission or the need for manpower assistance caused by the long length of the frame.

[0030] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of a novel sandblasting device for photovoltaic frame surface treatment according to the present invention;

[0033] Figure 2 It is a structural schematic diagram of a conveying device;

[0034] Figure 3 It is a structural schematic diagram of the material guide component;

[0035] Figure 4 It is a structural schematic diagram of the sandblasting room;

[0036] Figure 5 This is a top view of the structure of the sandblasting room;

[0037] Figure 6 for Figure 5 Structural cross-section view at AA in the middle;

[0038] Figure 7 for Figure 5 Structural cross-section view at the middle BB;

[0039] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0040] 1-sandblasting chamber, 2-conveyor, 3-material guide assembly, 4-inverted U-shaped plate, 5-limiting piece, 6-side sandblasting piece, 7-first sandblasting piece, 8-second sandblasting piece, 101-fixed plate, 102-fixed beam, 103-guide roller, 104-curtain, 105-collecting bucket, 106-column, 201-bracket, 202-upper conveyor belt, 203-lower conveyor belt, 204-transmission roller, 205-hollow belt body, 206-motor, 207-protective shell, 208-leg, 401-slide, 501-shell, 502-double-headed screw, 503-slider, 504-slide, 505-rubber wheel, 506-handle, 601-vertical rod, 602-first nozzle, 701-long rod body, 702-short rod body, 703-second nozzle, 704-gap. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-7 As shown, the present invention is a novel sandblasting device for surface treatment of photovoltaic frames, comprising a sandblasting chamber 1, wherein a conveying device 2 is fixed to a feed inlet and a discharge outlet of the sandblasting chamber 1;

[0043] The conveying device 2 includes a bracket 201, and an upper conveyor belt 202 and a lower conveyor belt 203 are respectively provided at the upper and lower parts of the bracket 201, and a set of material guide components 3 are fixed on the top of the upper conveyor belt 202 and the lower conveyor belt 203 and at one end away from the sandblasting chamber 1;

[0044] The material guiding assembly 3 includes an inverted U-shaped plate 4 and a plurality of stoppers 5;

[0045] The inverted U-shaped plate 4 is fixed to the top of both sides of the bracket 201 through flange plates and screws, and a slide groove 401 is provided on the inverted U-shaped plate 4;

[0046] The stopper 5 includes a shell 501, which is fixed on the top of the inverted U-shaped plate 4. A double-headed screw 502 is rotatably connected in the shell 501. Both ends of the double-headed screw 502 are threadedly connected with a slider 503. The slider 503 is located in the shell 501 and is slidably connected to the shell 501. An opening is opened at the bottom of the shell 501. A slide bar 504 is fixed at the bottom of the slider 503. One end of the slide bar 504 passes through the opening and the slide groove 401 and is rotatably connected to a rubber wheel 505. One end of the double-headed screw 502 passes through one side of the shell 501 and is fixed with a handle 506.

[0047] The plurality of stoppers 5 on the upper conveyor belt 202 and the plurality of stoppers 5 on the lower conveyor belt 203 are staggeredly distributed;

[0048] A set of fixing plates 101 are fixed on the top and bottom of one side of the sandblasting room 1, and a plurality of side sandblasting parts 6 are fixed side by side between the set of fixing plates 101. The plurality of side sandblasting parts 6 are respectively opposite to the plurality of position limiting parts 5 on the upper conveyor belt 202 and the lower conveyor belt 203;

[0049] The side sandblasting member 6 includes a group of vertical rods 601, the top of the vertical rods 601 is fixed in the fixed plate 101, and a first nozzle 602 is fixed obliquely at one end of the vertical rods 601. The group of first nozzles 602 on the side sandblasting member 6 are arranged opposite to each other;

[0050] A fixed beam 102 is fixed to the top and the bottom of the other side of the sandblasting room 1. A plurality of first sandblasting parts 7 and a plurality of second sandblasting parts 8 are fixed to one side of a group of fixed beams 102 at intervals. The structural features of the second sandblasting parts 8 are the same as those of the first sandblasting parts 7. The second sandblasting parts 8 are invertedly installed on one side of a group of fixed beams 102.

[0051] The first sandblasting member 7 includes a long rod body 701 and a short rod body 702. A second nozzle 703 is fixed at one end of the long rod body 701 and the short rod body 702. The second nozzles 703 on the long rod body 701 and the short rod body 702 are arranged opposite to each other. A gap 704 is formed between the second nozzles 703 on the long rod body 701 and the short rod body 702. The gaps 704 on the first sandblasting members 7 and the second sandblasting members 8 are respectively opposite to the position of the limit members 5 on the upper conveyor belt 202 and the lower conveyor belt 203.

[0052] Among them Figure 1-2 As shown, the upper conveyor belt 202 includes a plurality of transmission rollers 204 which are arranged side by side in the bracket 201 . A hollow belt body 205 is transmission-connected to the plurality of transmission rollers 204 . The structural features of the lower conveyor belt 203 are the same as those of the upper conveyor belt 202 .

[0053] Among them Figure 6-7 As shown, a plurality of guide rollers 103 are connected to rotate side by side at the upper and lower parts of the sandblasting chamber 1 , the upper surfaces of the guide rollers 103 at the upper part of the sandblasting chamber 1 are flush with the upper surface of the upper conveyor belt 202 , and the upper surfaces of the guide rollers 103 at the lower part of the sandblasting chamber 1 are flush with the upper surface of the lower conveyor belt 203 .

[0054] Among them Figure 1-2 As shown, the length of the lower conveyor belt 203 is greater than that of the upper conveyor belt 202 , and the difference is in the range of 30-50 cm. The lower conveyor belt 203 and the upper conveyor belt 202 are flush with each other near the end of the sandblasting chamber 1 .

[0055] Among them Figure 1-2 As shown, a motor 206 is fixed to the lower part of one side of the bracket 201 through a mounting seat, and a pulley is fixed to one end of one of the transmission rollers 204 on the upper conveyor belt 202 and the lower conveyor belt 203, and belts are connected to the two pulleys for transmission, and the motor 206 is fixedly connected to the pulley axis on the lower conveyor belt 203.

[0056] Among them Figure 1-2 As shown, a protective shell 207 is fixed to the outside of the bracket 201 , and a set of pulleys and belts are located inside the protective shell 207 .

[0057] Among them Figure 1 As shown, the widths of the feed port and the discharge port on the sandblasting chamber 1 are the same as the width of the bracket 201, and a barrier curtain 104 is fixed on the upper inner part of the feed port and the discharge port.

[0058] It also includes a sand storage bin and an air compressor. The feed ends of the first nozzles 602 and the second nozzles 703 are connected to the sand storage bin through pipelines and pump bodies, and the air intake ends of the first nozzles 602 and the second nozzles 703 are connected to the air compressor through pipelines and valve bodies.

[0059] Among them Figure 4 and Figure 6-7 As shown, a collecting bucket 105 is provided at the bottom of the sandblasting chamber 1, a recovery pipe is provided on the collecting bucket 105, and a switch valve is provided on the recovery pipe.

[0060] Among them Figure 1-7 As shown, a plurality of legs 208 are fixed to the bottom of the bracket 201, a plurality of columns 106 are fixed to the sides of the sandblasting chamber 1, the bottom ends of the columns 106 are flush with the bottom ends of the legs 208, and the sandblasting chamber 1 and the conveying device 2 are placed flat on the ground through the legs 208 and the columns 106.

[0061] The working principle of the present invention is as follows: take out the photovoltaic frame that needs to be sandblasted, pass one end of the photovoltaic frame through the two rubber wheels 505 of the upper limit member 5 on the upper conveyor belt 202, turn the handle 506 to drive the double-headed screw 502 to rotate, and adjust the distance between the two rubber wheels 505 so that the rubber wheels 505 are close to the photovoltaic frame, which can limit the position of the frame so that the frame can be moved straight into the sandblasting room 1, and discharge the material on the upper conveyor belt 202 and the lower conveyor belt 203 in the same way. The upper conveyor belt 202 and the lower conveyor belt 203 can slowly move the frame into the sandblasting room 1, the side sandblasting part 6 can sandblast both sides of the frame, and the first sandblasting part 7 can sandblast the top surface of the frame, and the second sandblasting part 8 can sandblast the bottom surface of the frame. The frame that has been sandblasted is output through the conveying device 2 on the other side of the sandblasting room 1.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A new type of sandblasting device for photovoltaic frame surface treatment, characterized in that: It comprises a sandblasting chamber (1), wherein a feeding port and a discharging port of the sandblasting chamber (1) are both fixed with a conveying device (2); The conveying device (2) comprises a bracket (201), wherein an upper conveyor belt (202) and a lower conveyor belt (203) are respectively arranged at the upper and lower parts of the bracket (201), and a group of material guide components (3) are fixed at the top of the upper conveyor belt (202) and the lower conveyor belt (203) and at one end away from the sandblasting chamber (1); The material guiding assembly (3) comprises an inverted U-shaped plate (4) and a plurality of limiting members (5); The inverted U-shaped plate (4) is fixed to the top of both sides of the bracket (201) by means of flange plates and screws, and a sliding groove (401) is provided on the inverted U-shaped plate (4); The limiting member (5) comprises a shell (501), wherein the shell (501) is fixed on the top of the inverted U-shaped plate (4), a double-headed screw (502) is rotatably connected inside the shell (501), both ends of the double-headed screw (502) are threadedly connected to sliders (503), the slider (503) is located inside the shell (501) and is slidably connected to the shell (501), an opening is opened at the bottom of the shell (501), a sliding rod (504) is fixed at the bottom of the slider (503), one end of the sliding rod (504) passes through the opening and the slide groove (401) and is rotatably connected to a rubber wheel (505), and one end of the double-headed screw (502) passes through one side of the shell (501) and is fixed to a handle (506); The plurality of position-limiting members (5) on the upper conveyor belt (202) and the plurality of position-limiting members (5) on the lower conveyor belt (203) are distributed in an alternating manner; A group of fixing plates (101) are fixed on the top and bottom of one side of the sandblasting room (1), a plurality of side sandblasting parts (6) are fixed side by side between the fixing plates (101), and the plurality of side sandblasting parts (6) are respectively positioned opposite to a plurality of limiting parts (5) on the upper conveyor belt (202) and the lower conveyor belt (203); The side sandblasting member (6) comprises a group of vertical rods (601), the top ends of the vertical rods (601) are fixed in the fixing plate (101), a first nozzle (602) is fixed obliquely at one end of the vertical rods (601), and the group of first nozzles (602) on the side sandblasting member (6) are arranged opposite to each other; A fixed beam (102) is fixed to the top and bottom of the other side of the sandblasting room (1); a plurality of first sandblasting parts (7) and a plurality of second sandblasting parts (8) are fixed to one side of a group of the fixed beams (102) at intervals; the structural features of the second sandblasting parts (8) are the same as those of the first sandblasting parts (7); and the second sandblasting parts (8) are invertedly installed on one side of a group of the fixed beams (102); The first sandblasting member (7) comprises a long rod body (701) and a short rod body (702), one end of each of the long rod body (701) and the short rod body (702) is fixed with a second nozzle (703), the second nozzles (703) on the long rod body (701) and the short rod body (702) are arranged opposite to each other, a gap (704) is formed between the second nozzles (703) on the long rod body (701) and the short rod body (702), and the gaps (704) on the first sandblasting member (7) and the second sandblasting member (8) are respectively opposite to the position of the stoppers (5) on the upper conveyor belt (202) and the lower conveyor belt (203).

2. A novel sandblasting device for photovoltaic frame surface treatment according to claim 1, characterized in that: The upper conveyor belt (202) comprises a plurality of transmission rollers (204), the plurality of transmission rollers (204) being arranged side by side in a bracket (201), the plurality of transmission rollers (204) being transmission-connected with a hollow belt body (205), and the structural features of the lower conveyor belt (203) are the same as those of the upper conveyor belt (202).

3. A novel sandblasting device for photovoltaic frame surface treatment according to claim 1, characterized in that: A plurality of guide rollers (103) are rotatably connected in parallel at the upper and lower parts of the sandblasting chamber (1); the upper surfaces of the plurality of guide rollers (103) at the upper part of the sandblasting chamber (1) are flush with the upper surface of the upper conveyor belt (202); and the upper surfaces of the plurality of guide rollers (103) at the lower part of the sandblasting chamber (1) are flush with the upper surface of the lower conveyor belt (203).

4. A novel sandblasting device for photovoltaic frame surface treatment according to claim 1, characterized in that: The length of the lower conveyor belt (203) is greater than that of the upper conveyor belt (202), and the difference is in the range of 30-50 cm. The lower conveyor belt (203) and the upper conveyor belt (202) are flush with one end close to the sandblasting chamber (1).

5. A novel sandblasting device for photovoltaic frame surface treatment according to claim 2, characterized in that: A motor (206) is fixed to the lower part of one side of the bracket (201) via a mounting seat, and a pulley is fixed to one end of one of the transmission rollers (204) on the upper conveyor belt (202) and the lower conveyor belt (203), and belts are connected to the two pulleys for transmission, and the motor (206) is fixedly connected to the pulley axis on the lower conveyor belt (203).

6. A novel sandblasting device for photovoltaic frame surface treatment according to claim 5, characterized in that: A protective shell (207) is fixed on the outside of the bracket (201), and a set of pulleys and belts are located inside the protective shell (207).

7. A novel sandblasting device for photovoltaic frame surface treatment according to claim 1, characterized in that: The widths of the feed inlet and the discharge outlet on the sandblasting chamber (1) are the same as the width of the bracket (201), and a barrier curtain (104) is fixed to the upper inner part of the feed inlet and the discharge outlet.

8. The novel sandblasting device for photovoltaic frame surface treatment according to claim 1 is characterized in that: It also includes a sand storage bin and an air compressor. The feed ends of the first nozzles (602) and the second nozzles (703) are connected to the sand storage bin through pipelines and a pump body, and the air intake ends of the first nozzles (602) and the second nozzles (703) are connected to the air compressor through pipelines and a valve body.

9. A novel sandblasting device for photovoltaic frame surface treatment according to claim 1, characterized in that: A collecting hopper (105) is provided at the bottom of the sandblasting chamber (1), a recovery pipe is provided on the collecting hopper (105), and a switch valve is provided on the recovery pipe.

10. The novel sandblasting device for photovoltaic frame surface treatment according to claim 1, characterized in that: A plurality of legs (208) are fixed to the bottom of the support (201), and a plurality of columns (106) are fixed to the side surface of the sandblasting chamber (1), wherein the bottom ends of the columns (106) are flush with the bottom ends of the legs (208).

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