Sandblasting equipment

Abstract

The application discloses a sand blasting device, which comprises a sand blasting chamber, a bearing mechanism, a spray gun mechanism and a sand supply mechanism. The sand blasting chamber has a sand blasting space. The bearing mechanism comprises a bearing part which can move in and out of the sand blasting space and can rotate. The spray gun mechanism comprises a first spray gun, a second spray gun and a third spray gun which can move. The first spray gun, the second spray gun and the third spray gun respectively spray sand to a first surface, a second surface and an outer surface of a workpiece. The sand supply mechanism comprises a sand return pipeline, a cyclone separator and a sand shunt. One end of the sand return pipeline is communicated with the sand blasting space, and the other end is communicated with a feeding port of the cyclone separator. The sand shunt is arranged in the sand blasting space, and a feeding port of the sand shunt is communicated with a discharging port of the cyclone separator. Discharging ports of the sand shunt are respectively communicated with the first spray gun, the second spray gun and the third spray gun. The sand blasting device can realize simultaneous sand blasting on three surfaces of the workpiece and sand blasting on the whole workpiece, thereby improving work efficiency and sand blasting yield.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of workpiece sand blasting device, in particular to a sand blasting equipment. BACKGROUND

[0002] In actual production and processing, it is usually necessary to carry out sand blasting treatment on the workpiece to make the workpiece meet the production requirements. At present, a spray gun is usually used to spray sand on the workpiece. However, in the traditional sand blasting process, a spray gun is used to spray sand on the workpiece. Since the front surface, back surface, side surface and whole region of the workpiece need to be sprayed, the workpiece needs to be loaded and unloaded multiple times to adjust the relative position between the workpiece and the spray gun, so that the front surface, back surface, side surface and whole region of the workpiece are sprayed. This results in high labor intensity and low work efficiency. In addition, since the workpiece needs to be loaded and unloaded frequently, the placement position of the workpiece is different each time, which leads to unstable sand blasting quality and affects the sand blasting yield. SUMMARY

[0003] In view of the above, it is necessary to provide a sand blasting equipment to realize simultaneous sand blasting on three surfaces of the workpiece and sand blasting on the whole region of the workpiece, thereby improving work efficiency and sand blasting yield.

[0004] The sand blasting equipment provided by the embodiment of the present application is used to spray sand material towards the first surface of the workpiece, the second surface opposite to the first surface and the outer side surface connected between the first surface and the second surface, and comprises:

[0005] A sand blasting chamber having a sand blasting space;

[0006] A carrying mechanism arranged in the sand blasting chamber, comprising a carrying member movable in and out of the sand blasting space and rotatable, the carrying member being used to carry and drive the workpiece to rotate;

[0007] A spray gun mechanism arranged in the sand blasting space, comprising a movable first spray gun, a second spray gun and a third spray gun, the first spray gun being used to spray sand material towards the first surface, the second spray gun being used to spray sand material towards the second surface, and the third spray gun being used to spray sand material towards the outer side surface, the first spray gun and the second spray gun being symmetrically arranged, and the first spray gun and the second spray gun being located on the same side of the third spray gun;

[0008] The sand supply mechanism comprises a sand return pipe, a cyclone separator and a sand distributor, one end of the sand return pipe is connected with the sand blasting chamber and communicates with the sand blasting space, the other end of the sand return pipe communicates with the feed inlet of the cyclone separator, the cyclone separator is arranged in the sand blasting chamber, the sand distributor is arranged in the sand blasting space and the feed inlet of the sand distributor communicates with the discharge outlet of the cyclone separator, the discharge outlets of the sand distributor respectively communicate with the first spray gun, the second spray gun and the third spray gun, wherein the sand in the sand blasting space is returned to the cyclone separator through the sand return pipe, is separated and treated by the cyclone separator, flows into the sand distributor, and is respectively distributed to the first spray gun, the second spray gun and the third spray gun through the sand distributor.

[0009] In some embodiments, the spray gun mechanism further comprises a movement assembly arranged in the sand blasting chamber and a connecting member connected with the movement assembly to move under the driving of the movement assembly, and the first spray gun, the second spray gun and the third spray gun are connected with the connecting member and move synchronously with the connecting member.

[0010] In some embodiments, the spray angles of the first spray gun and the second spray gun are adjustable.

[0011] In some embodiments, the sand blasting device further comprises a spray gun gas tank having a gas inlet and a plurality of gas outlets, the gas inlet of the spray gun gas tank is used to communicate with an external gas source, and the plurality of gas outlets of the spray gun gas tank respectively communicate with the first spray gun, the second spray gun and the third spray gun, so that the first spray gun, the second spray gun and the third spray gun spray sand mixed with gas.

[0012] In some embodiments, the sand blasting chamber further has a material return port communicating with the bottom of the sand blasting space and the sand return pipe, and the sand blasting device further comprises a spiral auger arranged in the sand blasting chamber and located at the bottom of the sand blasting space, which is used to rotationally make the sand in the sand blasting space flow to the material return port.

[0013] In some embodiments, the sand blasting device further comprises a sand adding mechanism communicating with the sand return pipe, which is used to add sand into the sand return pipe.

[0014] In some embodiments, the sand feeding mechanism further comprises a material level detector arranged at the discharge port of the cyclone separator, the material level detector is coupled with the sand feeding mechanism, and the material level detector is configured to detect the material level of the sand material at the discharge port of the cyclone separator and transmit the detection information to the sand feeding mechanism, so that the sand feeding mechanism adds sand material into the sand return pipeline.

[0015] In some embodiments, the carrying mechanism further comprises a rotating cylinder, a carrier, a carrier plate, a first driving member, a second driving member, and a transmission assembly. One end of the rotating cylinder is rotatably arranged in the sand blasting chamber, the other end of the rotating cylinder is connected with the carrier, the carrier plate is connected with the rotating cylinder, the carrying member is rotatably arranged in the carrier, the first driving member is arranged on the carrier plate and connected with the rotating cylinder to drive the rotating cylinder to rotate, the second driving member is arranged on the carrier plate and spaced apart from the first driving member, the transmission assembly is arranged in the rotating cylinder and the carrier, and the transmission assembly is connected between the second driving member and the carrying member. The second driving member drives the carrying member to rotate through the transmission assembly.

[0016] In some embodiments, the transmission assembly comprises a transmission rod, a transmission belt, and a transmission wheel. One end of the transmission rod is in transmission connection with the second driving member, the other end of the transmission rod extends into the carrier and is spaced apart from the carrying member, the transmission wheel is rotatably arranged in the carrier and connected with the carrying member, and the transmission belt is sleeved between the other end of the transmission rod and the transmission wheel.

[0017] In some embodiments, the sand blasting device further comprises a dust removal mechanism arranged on one side of the sand blasting chamber, the dust removal mechanism is in communication with the exhaust port of the cyclone separator, the dust removal mechanism is configured to provide suction force for the cyclone separator to make the sand material in the sand blasting space return to the cyclone separator through the sand return pipeline, and the dust removal mechanism is further configured to treat the exhaust gas discharged through the exhaust port of the cyclone separator.

[0018] When the aforementioned sandblasting equipment sandblasts a workpiece, the supporting component of the bearing mechanism carries the workpiece outside the sandblasting space and moves it into the sandblasting space, so that the workpiece corresponds to the spray gun mechanism. That is, the first spray gun corresponds to the first side of the workpiece, the second spray gun corresponds to the second side of the workpiece, and the third spray gun corresponds to the outer side of the workpiece. The sand supply mechanism's sand return pipe, cyclone separator, and sand distributor work together to continuously supply sand to the first, second, and third spray guns, so that the first spray gun sprays sand towards the first side of the workpiece, the second spray gun sprays sand towards the second side of the workpiece, and the third spray gun sprays sand towards the third side of the workpiece, thereby achieving simultaneous sandblasting of the three sides of the workpiece. The first, second, and third spray guns move and spray sand towards the first, second, and outer sides of the workpiece, respectively. At the same time, the supporting component drives the workpiece to rotate, causing the workpiece to move in a contour-following manner, so that the first, second, and third spray guns perform full-area sandblasting treatment on the workpiece.

[0019] The sandblasting equipment provided in this application embodiment, through the coordinated operation of the sandblasting chamber, the supporting mechanism, the spray gun assembly, and the sand supply mechanism, achieves simultaneous sandblasting of three sides of the workpiece and full-area sandblasting of the workpiece. This eliminates the need for frequent loading and unloading to adjust the workpiece's position, reducing loading and unloading time and improving sandblasting efficiency. Since the spray gun mechanism can simultaneously sandblast three sides of the workpiece, frequent manual loading and unloading is unnecessary, reducing labor intensity. The absence of frequent manual loading and unloading ensures a relatively stable workpiece placement, improving sandblasting yield. The sandblasting equipment sandblasts the workpiece within the sandblasting space, avoiding sand splashing that pollutes the environment and causes dust hazards to workers. The sand supply mechanism continuously supplies sand to the spray gun mechanism through the sand return pipe, cyclone separator, and sand distributor, improving sand utilization and saving sand costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the sandblasting equipment provided in the embodiments of this application.

[0021] Figure 2 yes Figure 1 A schematic diagram of the sandblasting equipment from another perspective.

[0022] Figure 3 yes Figure 1 The sandblasting chamber of the sandblasting equipment shown is a cross-sectional view along line III-III, including the sandblasting chamber, sand supply mechanism, auger, and sand adding mechanism.

[0023] Figure 4 yes Figure 1 The diagram shows the structure of the spray gun mechanism of the sandblasting equipment.

[0024] Figure 5 yes Figure 4A schematic view of the first, second, third spray guns, the mounting assembly and the state of the sprayed sand of the workpiece.

[0025] Figure 6 is Figure 4 A schematic view of the structure of the first, second, third spray guns and the mounting assembly of the spray gun mechanism.

[0026] Figure 7 is Figure 6 An exploded view of the first, second, third spray guns and the mounting assembly.

[0027] Figure 8 is Figure 1 A schematic view of the structure of the carrying mechanism.

[0028] Figure 9 is Figure 8 An exploded view of the carrying mechanism.

[0029] Explanation of main element symbols

[0030] Sand blasting device 100

[0031] Sand blasting chamber 10

[0032] Sand blasting space 11

[0033] Material return port 12

[0034] Carrying mechanism 20

[0035] Carrying member 21

[0036] Rotating cylinder 22

[0037] Carrying table 23

[0038] Bottom shell 231

[0039] Cover plate 232

[0040] Carrying plate 24

[0041] First driving member 25

[0042] Second driving member 26

[0043] Transmission assembly 27

[0044] Transmission rod 271

[0045] Transmission belt 272

[0046] Transmission wheel 273

[0047] Spray gun mechanism 30

[0048] First spray gun 31

[0049] Second spray gun 32

[0050] Third spray gun 33

[0051] Body 301

[0052] Spray head 302

[0053] Sand inlet 303

[0054] Air inlet 304

[0055] Sand outlet 305

[0056] Motion assembly 34

[0057] Base 341

[0058] Carriage 342

[0059] First slide rail slider structure 343

[0060] Slide seat 344

[0061] Second slide rail slider structure 345

[0062] Connecting arm 346

[0063] Connecting piece 35

[0064] Mounting assembly 36

[0065] First connecting rod 361

[0066] First adjusting piece 362

[0067] First insertion hole 3621

[0068] Second adjusting piece 363

[0069] Second insertion hole 3631

[0070] First insertion rod 364

[0071] First connecting seat 365

[0072] Second insertion rod 366

[0073] Second connecting seat 367

[0074] Second connecting rod 368

[0075] Third adjusting piece 369

[0076] Third insertion hole 3691

[0077] Third insertion rod 3610

[0078] Third connecting seat 3611

[0079] Connecting plate 3612

[0080] Sand supply mechanism 40

[0081] Sand return pipeline 41

[0082] Cyclone separator 42

[0083] Inlet 421

[0084] Outlet 422

[0085] Exhaust port 423

[0086] Sand shunt 43

[0087] Inlet 431

[0088] Shunt 432

[0089] Level detector 44

[0090] Lance gas tank 50

[0091] Air inlet 51

[0092] Gas shunt 52

[0093] Screw auger 60

[0094] Sand adding mechanism 70

[0095] Dust removal mechanism 80

[0096] Workpiece 200

[0097] First surface 201

[0098] Second surface 202

[0099] Outer surface 203 DETAILED DESCRIPTION

[0100] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference numbers represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are for the purpose of explanation only, and are not to be understood as limiting the present application.

[0101] In the description of the present application, it is to be understood by the terms indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0102] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be broadly understood, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection or can communicate with each other, it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0103] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0104] Please refer to Figure 1 The embodiment of the present application provides a sand blasting equipment 100. Please refer to Figure 5 The sand blasting equipment 100 is used for spraying sand material to the first surface 201 of the workpiece 200, the second surface 202 opposite to the first surface 201, and the outer side surface 203 connected between the first surface 201 and the second surface 202. Wherein, the workpiece 200 can be a middle frame, and the first surface 201 and the second surface 202 can be the front surface and the back surface of the middle frame respectively. It can be understood that the workpiece 200 can also be other objects with the first surface 201, the second surface 202 and the outer side surface 203, and the embodiment of the present application does not make specific limitation to this.

[0105] Please refer to Figure 1 , Figure 2 and Figure 3 The sand blasting equipment 100 comprises a sand blasting chamber 10, a bearing mechanism 20, a spray gun mechanism 30 and a sand supply mechanism 40.

[0106] The sandblasting chamber 10 has a sandblasting space 11, wherein the sandblasting space 11 is used for sandblasting treatment of the workpiece 200. It can be understood that the sandblasting chamber 10 can be understood as a hollow structure with the sandblasting space 11 and being substantially closed, the sandblasting chamber 10 can be seated on an external machine table, and the sandblasting chamber 10 can also be configured to have a machine table itself, the sandblasting chamber 10 can be used for installing the bearing mechanism 20, the sandblasting gun mechanism 30, the sand supply mechanism 40 and the like, wherein the sandblasting chamber 10 hides part of the specific structure for installing the bearing mechanism 20, the sandblasting gun mechanism 30, the sand supply mechanism 40 and the like. By making the sandblasting chamber 10 into a closed hollow structure, the sandblasting treatment is carried out in the sandblasting space 11, which prevents the sandblasting from hurting people, dust flying and polluting the environment, and facilitates the recycling of sand. It can be understood that the sandblasting chamber 10 can also be configured to have an explosion-proof glass window, so as to facilitate the sandblasting through the sandblasting chamber 10. The sandblasting chamber 10 can be integrally made of 3mm thick stainless steel. The shape and size of the sandblasting chamber 10 can be set according to actual conditions, and the present application embodiment does not make specific limitation thereto.

[0107] The bearing mechanism 20 is arranged in the sandblasting chamber 10, and the bearing mechanism 20 comprises a bearing member 21 (see Figure 8 ) which can move in and out of the sandblasting space 11 and can rotate, and the bearing member 21 is used for bearing and driving the workpiece 200 to rotate. It can be understood that the bearing member 21 can bear and fix the workpiece 200, and the bearing member 21 can drive the workpiece 200 to move in and out of the sandblasting space 11, so as to facilitate the sandblasting treatment of the workpiece 200 in the sandblasting space 11 and the feeding and discharging of the workpiece 200 out of the sandblasting space 11, and the bearing member 21 can rotate to drive the workpiece 200 to rotate, so as to facilitate the profiled movement of the workpiece 200 and the global sandblasting treatment of the workpiece 200.

[0108] The sandblasting gun mechanism 30 is arranged in the sandblasting space 11, see Figure 5The spray gun mechanism 30 comprises a movable first spray gun 31, a second spray gun 32 and a third spray gun 33, the first spray gun 31 is used for spraying sand to the first surface 201, the second spray gun 32 is used for spraying sand to the second surface 202, and the third spray gun 33 is used for spraying sand to the outer side surface 203, the first spray gun 31 and the second spray gun 32 are symmetrically arranged, and the first spray gun 31 and the second spray gun 32 are located on the same side of the third spray gun 33. When the carrier 21 drives the workpiece 200 to move into the sand blasting space 11, the first spray gun 31, the second spray gun 32 and the third spray gun 33 spray sand to the first surface 201, the second surface 202 and the outer side surface 203 respectively, and the first spray gun 31, the second spray gun 32 and the third spray gun 33 move synchronously along the long side of the workpiece 200, for example, to spray sand to the long side of the workpiece 200, when the first spray gun 31, the second spray gun 32 and the third spray gun 33 move to the corner where the long side and the short side of the workpiece 200 meet, the carrier 21 drives the workpiece 200 to rotate, at the same time, the first spray gun 31, the second spray gun 32 and the third spray gun 33 move adaptively, so that the short side of the workpiece 200 after rotation corresponds to the first spray gun 31, the second spray gun 32 and the third spray gun 33, thereby spraying sand to the short side of the workpiece 200, so as to spray sand to the whole workpiece 200.

[0109] The sand supply mechanism 40 comprises a sand return pipeline 41, a cyclone separator 42 and a sand shunt 43, one end of the sand return pipeline 41 is connected with the sand blasting chamber 10 and communicates with the sand blasting space 11, the other end of the sand return pipeline 41 communicates with the inlet 421 of the cyclone separator 42, the cyclone separator 42 is arranged in the sand blasting chamber 10, the sand shunt 43 is arranged in the sand blasting space 11 and the inlet 431 of the sand shunt 43 communicates with the outlet 422 of the cyclone separator 42, the distribution ports 432 of the sand shunt 43 respectively communicate with the first spray gun 31, the second spray gun 32 and the third spray gun 33, wherein the sand in the sand blasting space 11 flows back to the cyclone separator 42 through the sand return pipeline 41, and after separation and treatment by the cyclone separator 42, the sand flows into the sand shunt 43, and then flows to the first spray gun 31, the second spray gun 32 and the third spray gun 33 through the sand shunt 43, so as to continuously provide sand for the first spray gun 31, the second spray gun 32 and the third spray gun 33, reuse sand and save sand. The sand shunt 43 has a plurality of distribution ports 432, and the shape of the sand return pipeline 41 can be a circular pipe, a rectangular pipe or a combined pipe of a circle and a rectangle.

[0110] When the sand blasting device 100 is used to blast the workpiece 200, the carrier 21 of the carrying mechanism 20 carries and fixes the workpiece 200 outside the sand blasting space 11 and drives the workpiece 200 to move into the sand blasting space 11, so that the workpiece 200 corresponds to the spray gun mechanism 30, that is, the first spray gun 31 corresponds to the first surface 201 of the workpiece 200, the second spray gun 32 corresponds to the second surface 202 of the workpiece 200, and the third spray gun 33 corresponds to the third surface of the workpiece 200. The sand supply pipe 41, the cyclone separator 42 and the sand shunt 43 of the sand supply mechanism 40 cooperate to continuously supply sand to the first spray gun 31, the second spray gun 32 and the third spray gun 33, so that the first spray gun 31 sprays sand toward the first surface 201 of the workpiece 200, the second spray gun 32 sprays sand toward the second surface 202 of the workpiece 200, and the third spray gun 33 sprays sand toward the third surface of the workpiece 200, thereby realizing simultaneous sand blasting of the three surfaces of the workpiece 200. The first spray gun 31, the second spray gun 32 and the third spray gun 33 move to spray sand on the first surface 201, the second surface 202 and the outer surface 203 respectively, while the carrier 21 drives the workpiece 200 to rotate to make the workpiece 200 move in a contour shape, so that the first spray gun 31, the second spray gun 32 and the third spray gun 33 perform global sand blasting on the workpiece 200.

[0111] In order to improve the sand blasting efficiency of the sand blasting device 100, in the embodiment, the number of the carrying mechanisms 20 is multiple, for example, five, and the multiple carrying mechanisms 20 are arranged at intervals in the sand blasting chamber 10. Correspondingly, the number of the first spray guns 31, the second spray guns 32 and the third spray guns 33 is equal to the number of the carrying mechanisms 20 and is arranged one by one, and the multiple first spray guns 31, the multiple second spray guns 32 and the multiple third spray guns 33 move synchronously. In this way, by arranging the multiple carrying mechanisms 20, the first spray guns 31, the second spray guns 32 and the third spray guns 33, the sand blasting device 100 can blast multiple workpieces 200 at a time, thereby improving the sand blasting efficiency of the sand blasting device 100.

[0112] In order to ensure the jetting pressure of each spray gun, in the embodiment, the sand blasting device 100 further comprises a spray gun gas tank 50, which can be arranged in the sand blasting chamber 10. The spray gun gas tank 50 has a gas inlet 51 and a plurality of gas outlets 52. The gas inlet 51 of the spray gun gas tank 50 is used to communicate with an external gas source. The plurality of gas outlets 52 of the spray gun gas tank 50 respectively communicate with the first spray gun 31, the second spray gun 32 and the third spray gun 33, so that the first spray gun 31, the second spray gun 32 and the third spray gun 33 jet the sand mixed with gas. The number of the spray gun gas tank 50 can be two. The two spray gun gas tanks 50 are arranged at intervals, and each spray gun gas tank 50 has a plurality of gas outlets 52, so that the plurality of gas outlets 52 of the two spray gun gas tanks 50 can communicate with the plurality of first spray guns 31, the plurality of second spray guns 32 and the plurality of third spray guns 33 one by one. In this way, by arranging the spray gun gas tank 50, the spray gun gas tank 50 can buffer the air pressure gas, so as to shunt the gas for each spray gun and provide stable and sufficient gas flow for each spray gun, so as to ensure the jetting pressure of each spray gun. It can be understood that the spray gun gas tank 50 can be made of a 5mm thick seamless stainless steel pipe with a pressure resistance of 1.2MPa. The gas inlet 51 of the spray gun gas tank 50 can be arranged as a DN50 large diameter, and each gas outlet 52 can be arranged as a DN15 diameter. It can be understood that the spray gun gas tank 50 can be further provided with a pressure regulating valve and a water mist filter. The pressure regulating valve and the water mist filter are connected. The pressure regulating valve communicates with the external gas source. The water mist filter communicates with the gas inlet 51. The pressure regulating valve is used to adjust the gas pressure entering the spray gun gas tank 50, so as to ensure the stability of the pressure in the spray gun gas tank 50. The water mist filter is used to filter the gas and ensure the dryness of the gas. The gas pressure of the external gas source is required to be 0.6MPa-0.7MPa. The gas source flow is greater than or equal to 5 cubic meters per minute and is a dry compressed gas without water and oil.

[0113] In order to make the sand in the sandblasting chamber 10 backflow to the sand return pipeline 41, in the embodiment, the bottom of the sandblasting chamber 10 is roughly conical, for example, the slope angle of the bottom of the sandblasting chamber 10 is greater than or equal to 45 degrees, and the sandblasting chamber 10 further has a sand return port 12 which communicates with the bottom of the sandblasting space 11 and communicates with the sand return pipeline 41. It can be understood that the sand return port 12 is arranged at the bottom of the sandblasting chamber 10. The sandblasting equipment 100 further comprises a spiral auger 60 which is rotatably arranged in the sandblasting chamber 10 and located at the bottom of the sandblasting space 11. The spiral auger 60 is used to rotatably make the sand in the sandblasting space 11 flow to the sand return port 12. Wherein, the spiral auger 60 has relatively symmetrical left-handed blades and right-handed blades, and the spiral auger 60 can be made of 304 stainless steel material, which has good sand return effect and is convenient to maintain. The spiral auger 60 can be driven to rotate by an explosion-proof three-phase asynchronous speed reducer, a chain wheel, a chain and the like. The spiral auger 60 makes the sand in the sandblasting space 11 gather in the middle by rotating, so that the sand flows to the sand return port 12 and then flows to the sand return pipeline 41 from the sand return port 12. In this way, by arranging the above-mentioned spiral auger 60, the sand at both ends in the sandblasting space 11 can backflow to the sand return pipeline 41, which ensures the reuse of the sand and saves the sand.

[0114] It can be understood that, in order to avoid static electricity in the sandblasting chamber 10, the sandblasting chamber 10 can be further configured to have an electrostatic liquid nozzle (not shown in the figure). The electrostatic liquid nozzle is arranged in the sandblasting space 11 and is used to spray electrostatic liquid into the sandblasting space 11 in a timely and quantitative manner to avoid static electricity in the sandblasting chamber 10.

[0115] In order to ensure that the sand in the sandblasting equipment 100 is sufficient, in the embodiment, the sandblasting equipment 100 further comprises a sand adding mechanism 70 which communicates with the sand return pipeline 41 and is used to add sand into the sand return pipeline 41. Wherein, the sand adding mechanism 70 can communicate with the middle part of the sand return pipeline 41, and the sand adding mechanism 70 can be composed of a sand bin, a valve and a support, etc. The sand bin has sand therein, and the valve communicates between the sand bin and the sand return pipeline 41. By opening the valve, the sand in the sand bin flows into the sand return pipeline 41, so as to supplement the sand in the sand return pipeline 41, that is, to supplement the sand in the sandblasting equipment 100, and to ensure that the sand in the sandblasting equipment 100 is sufficient.

[0116] In order to realize the automation of the sand replenishment of the sand blasting equipment 100, in the embodiment, the sand supply mechanism 40 further comprises a material level detector 44, which is arranged at the discharge port 422 of the cyclone separator 42, and is coupled with the sand adding mechanism 70. The material level detector 44 is used to detect the material level of the sand at the discharge port 422 of the cyclone separator 42 and transmit the detection information to the sand adding mechanism 70, so that the sand adding mechanism 70 adds sand into the back sand pipeline 41. It should be understood that the valve can be a solenoid valve with the functions of receiving information, processing information, etc., or the valve is coupled with the material level detector 44 through a processing module with the functions of receiving information, processing information, storing information, transmitting information, etc. In this way, by arranging the above-mentioned material level detector 44, the sand at the discharge port 422 of the cyclone separator 42 is detected in real time, so that the sand blasting equipment 100 realizes the automation of the sand replenishment.

[0117] In order to treat the exhaust gas discharged from the cyclone separator 42, in the embodiment, the sand blasting equipment 100 further comprises a dust removal mechanism 80, which is arranged at one side of the sand blasting chamber 10 and is in communication with the exhaust port 423 of the cyclone separator 42. The dust removal mechanism 80 is used to provide suction force for the cyclone separator 42 to make the sand in the sand blasting space 11 flow back to the cyclone separator 42 through the back sand pipeline 41, and is used to treat the exhaust gas discharged from the exhaust port 423 of the cyclone separator 42. It should be understood that the dust removal mechanism 80 can be a wet dust removal system. After the dust removal mechanism 80 treats the exhaust gas discharged from the exhaust port 423 of the cyclone separator 42, the particulate matters in the exhaust gas are humidified and deposited in the wet dust removal system under the dust removal effect of the wet dust removal system, and the deposited particulate matters can be cleaned periodically. In this way, by arranging the above-mentioned dust removal mechanism 80, the exhaust gas discharged from the cyclone separator 42 is treated, realizing the pollution-free treatment of the exhaust gas.

[0118] Please refer to Figure 4 , Figure 5 , Figure 6 and Figure 7In the embodiment, the spray gun mechanism 30 further comprises a movement assembly 34 and a connecting piece 35, the movement assembly 34 is arranged in the sand blasting chamber 10, the connecting piece 35 is connected with the movement assembly 34 to move under the driving of the movement assembly 34, the first spray gun 31, the second spray gun 32 and the third spray gun 33 are all connected with the connecting piece 35 and move synchronously with the connecting piece 35. When the number of the first spray gun 31, the second spray gun 32 and the third spray gun 33 is multiple, the multiple first spray guns 31, the multiple second spray guns 32 and the multiple third spray guns 33 are all connected with the connecting piece 35 and arranged at intervals. In this way, by arranging the movement assembly 34 and the connecting piece 35, the first spray gun 31, the second spray gun 32 and the third spray gun 33 can move, so as to perform sand blasting treatment on the whole area of the workpiece 200.

[0119] In order to improve the versatility of the spray gun mechanism 30, in the embodiment, the spray angles of the first spray gun 31 and the second spray gun 32 can be adjusted, and the first spray gun 31, the second spray gun 32 and the third spray gun 33 roughly form a Y shape. In this way, by adjusting the spray angles of the first spray gun 31 and the second spray gun 32, the spray gun mechanism 30 can be adjusted adaptively according to the shape of different workpieces 200, so as to improve the versatility of the spray gun mechanism 30.

[0120] In the embodiment, the adjustable range of the spray angle of the first spray gun 31 and the adjustable range of the spray angle of the second spray gun 32 are both 0°-90°. In this way, by limiting the adjustable range of the spray angle of the first spray gun 31 and the adjustable range of the spray angle of the second spray gun 32, the spray gun mechanism 30 can adjust the spray angle of the first spray gun 31 and the spray angle of the second spray gun 32 adaptively according to the type of the workpiece 200 in actual use, which is beneficial to improve the versatility of the spray gun mechanism 30.

[0121] In the embodiment, the structures of the first spray gun 31, the second spray gun 32 and the third spray gun 33 are roughly similar, and the first spray gun 31, the second spray gun 32 and the third spray gun 33 all comprise a body 301 and a nozzle 302. The body 301 has a sand inlet 303, a gas inlet 304 and a sand outlet 305. The sand inlet 303 is used to communicate with the distribution port 432 of the sand distributor 43 of the sand supply mechanism 40, the gas inlet 304 is used to communicate with the distribution port 52 of the spray gun gas tank 50, the nozzle 302 communicates with the sand outlet 305, and the nozzle 302 is used to spray the mixed sand and gas sprayed out of the sand outlet 305. The body 301 can be made of aluminum material, and the nozzle 302 can be a boron carbide nozzle which is more durable. In this way, by arranging the specific structures of the first spray gun 31, the second spray gun 32 and the third spray gun 33, the durability and the spraying quality of the first spray gun 31, the second spray gun 32 and the third spray gun 33 can be improved.

[0122] It can be understood that in the embodiment, an electric proportional valve (not shown in the figure) can be arranged between the first spray gun 31, the second spray gun 32, the third spray gun 33 and the gas distribution port 52 of the spray gun gas tank 50, and the electric proportional valve has the functions of gas pressure setting, automatic monitoring and automatic compensation, so that the first spray gun 31, the second spray gun 32 and the third spray gun 33 have the function of pressure adjustment, and the universality of the spray gun mechanism 30 is improved.

[0123] In the embodiment, the movement assembly 34 can drive the connecting piece 35, the first spray gun 31, the second spray gun 32 and the third spray gun 33 to move in two perpendicular directions. Specifically, the movement assembly 34 can include a first linear module (not shown in the figure), a second linear module (not shown in the figure), a base 341, a sliding frame 342, a first sliding rail sliding block structure 343, a sliding seat 344, a second sliding rail sliding block structure 345 and a connecting arm 346. The base 341 can be arranged on the sand blasting chamber 10, the first sliding rail sliding block structure 343 is arranged on the base 341, and the sliding frame 342 is connected with the first sliding rail sliding block structure 343 to be slidably arranged on the base 341 through the first sliding rail sliding block structure 343, wherein the number of the base 341 and the first sliding rail sliding block structure 343 is two and one-to-one corresponding, the two bases 341 are arranged at intervals, the sliding frame 342 is substantially annular structure, the sliding frame 342 can move along the base 341 through the first sliding rail sliding block structure 343, and the first linear module is connected with the sliding frame 342 to drive the sliding frame 342 to move along the base 341. The second sliding rail sliding block structure 345 is arranged on the sliding frame 342, the sliding seat 344 is a hollow structure, the sliding seat 344 is connected with the second sliding rail sliding block structure 345 and is sleeved outside the second sliding rail sliding block structure 345 and the sliding frame 342, one end of the connecting arm 346 is connected with the sliding seat 344, and the other end of the connecting arm 346 is connected with the connecting piece 35, wherein the number of the second sliding rail sliding block structure 345, the sliding seat 344 and the connecting arm 346 is two, the second linear module is connected with one or two sliding seats 344 to drive the sliding seat 344 to move along the sliding frame 342, the moving direction of the sliding seat 344 is perpendicular to the moving direction of the sliding frame 342, and the extension direction of the first sliding rail sliding block structure 343 is perpendicular to the extension direction of the second sliding rail sliding block structure 345. In this way, by arranging the specific structure of the movement assembly 34, the movement assembly 34 can drive the connecting piece 35, the first spray gun 31, the second spray gun 32 and the third spray gun 33 to move in two perpendicular directions. The cyclone separator 42 and the sand flow divider 43 can also pass through the movement assembly 34, so that the sand flow divider 43 communicates with each spray gun, and the movement assembly 34 can also avoid the cyclone separator 42 and the sand flow divider 43.

[0124] It can be understood that, in other embodiments, the movement assembly 34 can also be other functional mechanisms capable of moving the connecting member 35, the first spray gun 31, the second spray gun 32 and the third spray gun 33 in two perpendicular directions, such as a two-axis linear module, a three-axis linear module, a mechanical arm, etc., wherein the cyclone separator 42 and the sand shunt 43 can be adaptively changed in position, which is not specifically limited in the embodiments of the application.

[0125] In the embodiments, the spray gun mechanism 30 further comprises a plurality of mounting assemblies 36, each of the first spray gun 31, the second spray gun 32 and the third spray gun 33 is connected with the connecting member 35 through the mounting assembly 36. Specifically, the mounting assembly 36 comprises a first connecting rod 361, a first adjusting member 362 and a second adjusting member 363, the first connecting rod 361 is connected with the connecting member 35 perpendicularly, the first adjusting member 362 and the second adjusting member 363 are arranged in a spaced manner, and the first adjusting member 362 and the second adjusting member 363 are movably arranged on the first connecting rod 361, the first adjusting member 362 is located directly above the second adjusting member 363, the first spray gun 31 is rotationally arranged on the first adjusting member 362, and the second spray gun 32 is rotationally arranged on the second adjusting member 363. In this way, by arranging the first connecting rod 361, the first adjusting member 362 and the second adjusting member 363, on the one hand, the first spray gun 31 is rotationally arranged on the first adjusting member 362, and the second spray gun 32 is rotationally arranged on the second adjusting member 363, so as to realize the function of adjustable spraying angle of the first spray gun 31 and the second spray gun 32, on the other hand, the first adjusting member 362 and the second adjusting member 363 are movably arranged on the first connecting rod 361, so that the first spray gun 31 and the second spray gun 32 also have the function of moving up and down, thereby further improving the versatility of the spray gun mechanism 30. It can be understood that the first adjusting member 362 and the second adjusting member 363 can be buckled on the first connecting rod 361 and fastened by a screw, when it is necessary to adjust the position of the first adjusting member 362 and the second adjusting member 363, the screw is loosened to adjust the position of the first adjusting member 362 and the second adjusting member 363, so as to adjust the position of the first spray gun 31 and the second spray gun 32, and the screw is tightened to fix the first adjusting member 362 and the second adjusting member 363, so as to fix the first spray gun 31 and the second spray gun 32.

[0126] In the embodiment, the first adjusting member 362 is provided with a plurality of first insertion holes 3621 arranged at intervals, the mounting assembly 36 further comprises a first insertion rod 364 and a first connecting seat 365, one end of the first insertion rod 364 is inserted into any one of the first insertion holes 3621, the other end of the first insertion rod 364 is connected with the first connecting seat 365, and the first spray gun 31 is arranged on the first connecting seat 365. The first insertion rod 364 can be rotatably connected with the first insertion hole 3621, and when it is necessary to adjust the spraying angle of the first spray gun 31, the angle of the first spray gun 31 can be adjusted by rotating the first insertion rod 364. The first connecting seat 365 can be buckled on the body 301 of the first spray gun 31 and fastened by a screw. In this way, the first spray gun 31 is rotatably arranged on the first adjusting member 362 by arranging the first insertion rod 364 and the first connecting seat 365, and the position of the first spray gun 31 can be adjusted by inserting the first insertion rod 364 into different first insertion holes 3621.

[0127] Understandably, in other embodiments, the first connecting seat 365 can also be rotatably connected with the first insertion rod 364. In this way, when it is necessary to adjust the spraying angle of the first spray gun 31, the spraying angle of the first spray gun 31 can be adjusted by rotating the first connecting seat 365, and the first insertion rod 364 can be fixedly inserted into the first insertion hole 3621.

[0128] In the embodiment, the second adjusting member 363 is provided with a plurality of second insertion holes 3631 arranged at intervals, the mounting assembly 36 further comprises a second insertion rod 366 and a second connecting seat 367, one end of the second insertion rod 366 is inserted into any one of the second insertion holes 3631, the other end of the second insertion rod 366 is connected with the second connecting seat 367, and the second spray gun 32 is arranged on the second connecting seat 367. The second insertion rod 366 can be rotatably connected with the second insertion hole 3631, and when it is necessary to adjust the spraying angle of the second spray gun 32, the angle of the second spray gun 32 can be adjusted by rotating the second insertion rod 366. The second connecting seat 367 can be buckled on the body 301 of the second spray gun 32 and fastened by a screw. In this way, the second spray gun 32 is rotatably arranged on the second adjusting member 363 by arranging the second insertion rod 366 and the second connecting seat 367, and the position of the second spray gun 32 can be adjusted by inserting the second insertion rod 366 into different second insertion holes 3631.

[0129] Understandably, in other embodiments, the second connecting seat 367 can also be rotatably connected with the second insertion rod 366. In this way, when it is necessary to adjust the spraying angle of the second spray gun 32, the spraying angle of the second spray gun 32 can be adjusted by rotating the second connecting seat 367, and the second insertion rod 366 can be fixedly inserted into the second insertion hole 3631.

[0130] In the embodiment, the spray angle and the spray position of the third spray gun 33 can also be adjusted, so as to further improve the versatility of the spray gun mechanism 30. Specifically, the mounting assembly 36 further comprises a second connecting rod 368, a third adjusting member 369, a third inserting rod 3610 and a third connecting seat 3611. The second connecting rod 368 is connected with the connecting piece 35 perpendicularly and is arranged at intervals with the first connecting rod 361. The third adjusting member 369 is movably arranged on the second connecting rod 368. The third adjusting member 369 is provided with a plurality of third inserting holes 3691 arranged at intervals. One end of the third inserting rod 3610 is inserted into any one of the third inserting holes 3691. The other end of the third inserting rod 3610 is connected with the third connecting seat 3611. The third spray gun 33 is arranged on the third connecting seat 3611. The second connecting rod 368 and the first connecting rod 361 can be connected on a connecting plate 3612. The connecting plate 3612 is connected with the connecting piece 35, so that the mounting assembly 36, the first spray gun 31, the second spray gun 32 and the third spray gun 33 are modularly arranged. The connecting plate 3612 can be substantially L-shaped. It can be understood that the second connecting rod 368 and the first connecting rod 361 can be rotatably connected with the connecting plate 3612, so as to improve the versatility of the spray gun mechanism 30. The second connecting rod 368 and the first connecting rod 361 can be arranged at intervals, so as to make the third spray gun 33, the second spray gun 32 and the first spray gun 31 located in the same plane. The connecting mode of the third adjusting member 369 with the second connecting rod 368 is substantially the same as the connecting mode of the first adjusting member 362 with the first connecting rod 361. The connecting mode of the third inserting rod 3610 with the third inserting hole 3691 is substantially similar to the connecting mode of the first inserting rod 364 with the first inserting hole 3621. The connecting mode of the third connecting seat 3611 with the third inserting rod 3610 and the third spray gun 33 is substantially similar to the connecting mode of the first connecting seat 365 with the first inserting rod 364 and the first spray gun 31. In this way, by arranging the second connecting rod 368, the third adjusting member 369, the third inserting rod 3610 and the third connecting seat 3611, on the one hand, the spray angle of the third spray gun 33 can be adjusted. On the other hand, the spray position of the third spray gun 33 can be adjusted, so as to further improve the versatility of the spray gun mechanism 30.

[0131] Please refer to Figure 8 and Figure 9In the embodiment, each bearing mechanism 20 further comprises a rotating cylinder 22, a bearing table 23, a bearing plate 24, a first driving member 25, a second driving member 26 and a transmission assembly 27. The rotating cylinder 22 is hollow and open at both ends. One end of the rotating cylinder 22 is rotatably arranged in the sand blasting chamber 10, for example, the one end of the rotating cylinder 22 is rotatably arranged in the sand blasting chamber 10 through a gear transmission structure. The other end of the rotating cylinder 22 is connected with the bearing table 23. The bearing plate 24 is connected with the rotating cylinder 22 and is arranged in a spaced manner with the sand blasting chamber 10. The bearing member 21 is rotatably arranged in the bearing table 23. The first driving member 25 and the second driving member 26 can be motors. The first driving member 25 is arranged on the bearing plate 24 and is connected with the rotating cylinder 22 to drive the rotating cylinder 22 to rotate. The second driving member 26 is arranged on the bearing plate 24 and is arranged in a spaced manner with the first driving member 25. The transmission assembly 27 is arranged in the transmission cylinder and the bearing table 23, and is connected between the second driving member 26 and the bearing member 21. The second driving member 26 drives the bearing member 21 to rotate through the transmission assembly 27. The first driving member 25 and the rotating cylinder 22 can be connected through gear engagement, for example, a gear is sleeved on the outside of the rotating cylinder 22, and the output shaft of the first driving member 25 is sleeved with a gear. In this way, by rotatably arranging the rotating cylinder 22 in the sand blasting chamber 10, when the first driving member 25 drives the rotating cylinder 22 to rotate, because the rotating cylinder 22 is rotatably arranged in the sand blasting chamber 10, the rotating cylinder 22, the bearing plate 24, the bearing table 23, the first driving member 25, the second driving member 26 and the transmission assembly 27 are all rotated, so that the bearing member 21 moves in and out of the sand blasting space 11. When the bearing member 21 drives the workpiece 200 to move into the sand blasting space 11, the second driving member 26 can drive the bearing member 21 to rotate, so as to drive the workpiece 200 to rotate, so as to facilitate the sand blasting mechanism 30 to perform global sand blasting treatment on the workpiece 200.

[0132] It can be understood that in other embodiments, the bearing mechanism 20 can also be other functional mechanisms capable of driving the workpiece 200 to move between the sand blasting space 11 and the outside of the sand blasting space 11 and capable of driving the bearing member 21 to rotate, for example, the bearing mechanism 20 comprises a linear module, a rotary motor and the like. The linear module is arranged in the sand blasting chamber 10 and one end of the linear module is located outside the sand blasting space 11. The other end of the linear module is located in the sand blasting space 11. The rotary motor is arranged in the linear module. The bearing member 21 is connected with the rotary motor. The linear module is used to drive the rotary motor and the bearing member 21 to move between the sand blasting space 11 and the outside of the sand blasting space 11. The rotary motor drives the bearing member 21 to rotate. It can be understood that the present application does not make specific limitations thereto.

[0133] It can be understood that in actual use, the sand blasting equipment 100 can also perform workpiece 200 feeding and discharging operations through external feeding and discharging equipment such as robots and the like. The present application does not make specific limitations thereto.

[0134] In order to improve the sandblasting efficiency of the sandblasting device 100, in the embodiment, each bearing mechanism 20 comprises two bearing members 21, and each bearing mechanism 20 further comprises two second driving members 26 and two transmission assemblies 27. The two second driving members 26, the two transmission assemblies 27 and the two bearing members 21 are arranged one by one. Specifically, the transmission assembly 27 comprises a transmission rod 271, a transmission belt 272 and a transmission wheel 273, the bearing table 23 comprises a bottom shell 231 and a cover plate 232, the bottom shell 231 is connected and communicated with the rotating cylinder 22, and the cover plate 232 is connected with the bottom shell 231. The two transmission rods 271 are arranged in the rotating cylinder 22 in a spaced manner, one end of each transmission rod 271 is in transmission connection with the corresponding second driving member 26, the other end of each transmission rod 271 extends into the bottom shell 231 of the bearing table 23 and is arranged in a spaced manner with the bearing member 21, the transmission wheel 273 is rotatably arranged in the bearing table 23 and connected with the corresponding bearing member 21, the transmission belt 272 is sleeved between the other end of the corresponding transmission rod 271 and the corresponding transmission wheel 273, and the transmission belt 272 can be in meshing connection with the transmission rod 271 and the transmission wheel 273. In this way, the second driving member 26 drives the transmission rod 271 to rotate, the transmission rod 271 drives the transmission belt 272 to rotate, the transmission belt 272 drives the transmission wheel 273 to rotate, and the transmission wheel 273 further drives the bearing member 21 and the workpiece 200 to rotate.

[0135] The sandblasting device 100 provided by the embodiment has the advantages that the sandblasting device 100 is cooperated with the sandblasting chamber 10, the bearing mechanism 20, the sandblasting gun assembly and the sand supply mechanism 40, so that the three surfaces of the workpiece 200 can be simultaneously sandblasted and the whole region of the workpiece 200 can be sandblasted, the position of the workpiece 200 does not need to be frequently adjusted by feeding and discharging, the feeding and discharging time is reduced, the sandblasting efficiency is improved, the labor intensity of workers is reduced, the sandblasting yield is improved, the workpiece 200 is sandblasted in the sandblasting space 11, the environment is not polluted and the dust harm to workers is avoided, the sand supply mechanism 40 continuously supplies sand to the sandblasting gun mechanism 30 through the sand return pipeline 41, the cyclone separator 42 and the sand distributor 43, the utilization rate of sand is improved, and the sand cost is saved.

[0136] The sandblasting device 100 provided by the embodiment is further cooperated with the sandblasting gun gas tank 50, so that stable and sufficient gas flow is provided for each sandblasting gun, and the jetting pressure of each sandblasting gun is ensured.

[0137] The sandblasting device 100 provided by the embodiment is further cooperated with the spiral auger 60, so that the sand at both ends in the sandblasting space 11 can flow back to the sand return pipeline 41, the sand is reused, and the sand is saved.

[0138] The sand blasting equipment 100 provided by the embodiment of the present application further guarantees the sufficient sand in the sand blasting equipment 100 through the cooperation of the sand adding mechanism 70.

[0139] The sand blasting equipment 100 provided by the embodiment of the present application further guarantees the sufficient sand in the sand blasting equipment 100 through the cooperation of the sand adding mechanism 70.

[0140] It is apparent for those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than limit the present application, and although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A sandblasting apparatus for blasting sand material toward a first face of a workpiece, a second face disposed opposite the first face, and an outer side face connecting between the first face and the second face, characterized by, The application relates to a sand blasting device, which comprises the following parts: a sand blasting chamber with a sand blasting space; a bearing mechanism arranged in the sand blasting chamber, which comprises a bearing part capable of moving in and out of the sand blasting space and rotating, the bearing part being used for bearing and driving the workpiece to rotate, the bearing mechanism further comprising a rotating cylinder, a bearing table, a bearing plate, a first driving part, a second driving part and a transmission assembly, one end of the rotating cylinder being rotatably arranged in the sand blasting chamber, the other end of the rotating cylinder being connected with the bearing table, the bearing plate being connected with the rotating cylinder, the bearing part being rotatably arranged in the bearing table, the first driving part being arranged on the bearing plate and connected with the rotating cylinder to drive the rotating cylinder to rotate, the second driving part being arranged on the bearing plate and spaced apart from the first driving part, the transmission assembly being arranged in the rotating cylinder and the bearing table, and the transmission assembly being connected between the second driving part and the bearing part, the second driving part driving the bearing part to rotate through the transmission assembly; a spray gun mechanism arranged in the sand blasting space, which comprises movable first, second and third spray guns, the first spray gun being used for spraying sand materials towards the first surface, the second spray gun being used for spraying sand materials towards the second surface, and the third spray gun being used for spraying sand materials towards the outer side surface, the first spray gun and the second spray gun being symmetrically arranged and located on the same side of the third spray gun, the spray gun mechanism further comprising a movement assembly arranged in the sand blasting chamber and a connecting part connected with the movement assembly to move under the driving of the movement assembly, the first, second and third spray guns being connected with the connecting part and moving synchronously with the connecting part; a sand supply mechanism comprising a sand return pipeline, a cyclone separator and a sand material shunt, one end of the sand return pipeline being connected with the sand blasting chamber and communicating with the sand blasting space, the other end of the sand return pipeline communicating with a feeding port of the cyclone separator, the cyclone separator being arranged in the sand blasting chamber, the sand material shunt being arranged in the sand blasting space and having a feeding port communicating with a discharging port of the cyclone separator, and the sand material shunt having discharging ports respectively communicating with the first, second and third spray guns, wherein the sand materials in the sand blasting space are returned to the cyclone separator through the sand return pipeline, separated and treated by the cyclone separator, and then flow into the sand material shunt, and are respectively shunted to the first, second and third spray guns through the sand material shunt.

2. The sandblasting apparatus of claim 1, wherein, The spraying angles of the first and second spray guns are adjustable.

3. The sandblasting apparatus of claim 1, wherein, The sand blasting device further comprises a spray gun gas tank with a gas inlet and a plurality of gas outlets, the gas inlet of the spray gun gas tank being used for communicating with an external gas source, and the plurality of gas outlets of the spray gun gas tank respectively communicating with the first, second and third spray guns, so that the first, second and third spray guns spray sand materials mixed with gas.

4. The sandblasting apparatus of claim 1, wherein, The sand blasting chamber further has a return material port in communication with the bottom of the sand blasting space and the return sand pipeline, and the sand blasting device further comprises a spiral auger rotationally arranged in the sand blasting chamber and located at the bottom of the sand blasting space, and the spiral auger is used to rotationally make the sand material in the sand blasting space flow to the return material port.

5. The sandblasting apparatus of claim 1, wherein, The sand blasting device further comprises a sand adding mechanism in communication with the return sand pipeline, and the sand adding mechanism is used to add sand material into the return sand pipeline.

6. The sandblasting apparatus of claim 5, wherein, The sand supply mechanism further comprises a material level detector arranged at the discharge port of the cyclone separator, and the material level detector is coupled with the sand adding mechanism, and the material level detector is used to detect the material level of the sand material at the discharge port of the cyclone separator and transmit the detection information to the sand adding mechanism, so that the sand adding mechanism adds sand material into the return sand pipeline.

7. The sandblasting apparatus of claim 1, wherein, The transmission assembly comprises a transmission rod, a transmission belt and a transmission wheel, one end of the transmission rod is in transmission connection with the second driving member, the other end of the transmission rod extends into the carrier and is arranged in interval with the bearing member, the transmission wheel is rotationally arranged in the carrier and is connected with the bearing member, and the transmission belt is sleeved between the other end of the transmission rod and the transmission wheel.

8. The sandblasting apparatus of claim 1, wherein, The sand blasting device further comprises a dust removal mechanism arranged at one side of the sand blasting chamber, the dust removal mechanism is in communication with the exhaust port of the cyclone separator, the dust removal mechanism is used to provide suction force for the cyclone separator so that the sand material in the sand blasting space flows back to the cyclone separator through the return sand pipeline, and the dust removal mechanism is further used to treat the exhaust gas discharged through the exhaust port of the cyclone separator.

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