A sandblasting device

Abstract

This invention relates to long-distance sandblasting technology, specifically a sandblasting device comprising a frame, a sandblasting pipe winding and unwinding device, a sandblasting machine, and an air supply slip ring. The sandblasting pipe winding and unwinding device includes a winding disc, a winding disc drive component, and a winding disc guide component. The winding disc is mounted on the frame via the winding disc guide component. The sandblasting machine is mounted above the sandblasting pipe winding and unwinding device and rotates together with it. The sandblasting pipe is wound layer by layer onto the winding disc. The air supply slip ring supplies air to the sandblasting machine, and the power supply slip ring supplies power to the sandblasting machine. The sandblasting pipe winding and unwinding device and the sandblasting machine form a rotating whole. The sandblasting pipe is wound in the sandblasting pipe winding and unwinding device, which can provide a very long sandblasting pipe for long-distance sandblasting operations. The air source required by the sandblasting machine is supplied by the air supply slip ring. The sandblasting pipe does not pass through the slip ring or other unnecessary connecting links, which helps to improve reliability, extend the service life of the sandblasting device, and reduce the consumption of spare parts and the workload of equipment maintenance.

Description

Technical Field

[0001] This invention relates to long-distance sandblasting technology, specifically a sandblasting device comprising a frame, a sandblasting pipe winding and unwinding device, a sandblasting machine, and an air supply slip ring. The sandblasting pipe winding and unwinding device includes a winding disc, a winding disc drive component, and a winding disc guide component. The winding disc is mounted on the frame via the winding disc guide component. The sandblasting machine is mounted above the sandblasting pipe winding and unwinding device and rotates together with it. The sandblasting pipe is wound layer by layer onto the winding disc. The air supply slip ring supplies air to the sandblasting machine, and the power supply slip ring supplies power to the sandblasting machine. The sandblasting pipe winding and unwinding device and the sandblasting machine form a rotating whole. The sandblasting pipe is wound in the sandblasting pipe winding and unwinding device, which can provide a very long sandblasting pipe for long-distance sandblasting operations. The air source required by the sandblasting machine is supplied by the air supply slip ring. The sandblasting pipe does not pass through the slip ring or other unnecessary connecting links, which helps to improve reliability, extend the service life of the sandblasting device, and reduce the consumption of spare parts and the workload of equipment maintenance. Background Technology

[0002] Sandblasting is widely used in various industries, primarily for rust removal, peeling, and other cleaning tasks. Existing sandblasting equipment typically has only a few meters to tens of meters of blasting hose, limiting its application to relatively small areas. Sometimes, longer blasting hoses are needed for longer distances, such as when sandblasting an underground pipeline exceeding 200 meters in length. This necessitates a blasting hose length of at least 200 meters. This requires increasing the blasting pressure and addressing the challenges of extending and retracting the excessively long hose. For instance, during operation, a traction rope must be used to pull the blasting head into the pipeline, and then the hose is pulled back while blasting continues.

[0003] Existing long-distance sandblasting equipment uses a separate sandblasting tube winding device to wind the sandblasting tube for deployment and retraction. However, since the winding device needs to rotate to wind and retract the sandblasting tube, the sandblasting tube from the sandblasting equipment needs to be connected to the separate sandblasting tube winding device via a rotary joint. Because the sandblasting tube contains high-speed airflow and sand carried by the high-speed airflow, the high-speed sand moving through the sandblasting tube can cause some damage to the rotary joint when it passes through the position of the rotary joint. Since high-speed gravel flows inside the rotary joint, the airflow channel inside the rotary joint should preferably not make sharp turns such as right angles, otherwise wear will be rapid. Therefore, the air intake shaft structure of the sandblasting tube winding device is relatively complex, and the sandblasting equipment consists of two parts: the sandblasting tank and the sandblasting tank winding device. During transportation, it occupies a large area on the vehicle, increasing transportation costs.

[0004] In view of the above problems, the present invention discloses a sandblasting device. The sandblasting device of the present invention integrates the sandblasting tank and other components of the traditional sandblasting device with the winding device for the sandblasting pipe. It not only occupies a small area, but also eliminates the need for complex rotating joints and other structures for the sandblasting pipe coming out of the sandblasting tank. This not only helps to reduce the consumption of accessories, but also helps to reduce the wind resistance of the sandblasting pipe. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the technical problem this invention aims to solve is to provide a sandblasting device, the solution of which is:

[0006] A sandblasting device, characterized in that it comprises a frame, a sandblasting pipe retraction device, a sandblasting machine, a sandblasting pipe, and an air supply slip ring;

[0007] The sandblasting pipe take-up and unwinding device includes a winding disc, a winding disc driving component, and a winding disc guiding component; the winding disc is a rotating component, preferably in the shape of an "I", "G" or "Well", and has a circular baffle. The winding disc is mounted on the frame through the winding disc guiding component, and the rotation center of the winding disc is along the direction of the plumb bob. The winding disc driving component drives the winding disc to rotate around the rotation center of the winding disc.

[0008] The sandblasting machine is similar to a regular sandblasting machine, comprising a sand tank and a sand valve. The sandblasting machine is mounted on a sandblasting hose retraction device and rotates together with it. The sand tank is used to store sand, and the sand valve can be a manual valve, a pneumatic valve, or both.

[0009] One end of the sandblasting pipe is connected to the sandblasting machine. The sandblasting pipe is wound onto the winding disc. When the sandblasting pipe is wound on the winding disc, it is wound layer by layer from the inside to the outside.

[0010] The rotation center of the air supply slip ring coincides with the rotation center of the winding disc. The rotating part of the air supply slip ring rotates together with the winding disc. The non-rotating part of the air supply slip ring is connected to the external air source pipe that supplies air to the sandblasting device. The air outlet of the rotating part of the air supply slip ring is connected to the sandblasting machine.

[0011] The sandblasting device frame is equipped with a guide seat that reciprocates in the direction of a plumb bob. The sandblasting pipe passes through the guide seat, and the guide seat controls the height position of the sandblasting pipe in the direction of the plumb bob when it is wound on the winding disc.

[0012] The sandblasting machine includes a pneumatic control valve and a vibrator. The air outlet of the rotating part of the air supply slip ring is connected to the components of the sandblasting machine that require air supply, such as the pneumatic control valve and the sand tank. If the vibrator is a pneumatic vibrator, the air outlet of the rotating part of the air supply slip ring also needs to be connected to the vibrator.

[0013] The sandblasting device includes a power supply slip ring. The rotating part of the power supply slip ring rotates together with the winding disc. The non-rotating part of the power supply slip ring is connected to an external electrical signal line or power supply line that supplies power to the sandblasting device. The output wire of the rotating part of the power supply slip ring is connected to the rotating part of the sandblasting device, and is used to control components such as solenoid valves that supply air to the air control valve, sand tank, vibrator, etc.

[0014] The sandblasting device frame has a guide roller in the direction of a plumb bob installed next to the guide seat. The length direction of the guide roller is parallel to the rotation center line of the winding disc. The guide roller is preferably a rotatable circular rod-shaped component, such as a round tube or a cylindrical component.

[0015] The frame includes an auxiliary sand loading rack. A horizontal foot pedal is installed at the middle height of the auxiliary sand loading rack, where feet can be placed. A bag-holding plate is installed at the top of the auxiliary sand loading rack, which is higher than the top of the sand jar. The bag-holding plate is a perforated plate with holes that are the same shape as the sand jar (usually circular) and concentric. The size of the holes is slightly smaller than the top view of the sand jar.

[0016] The sandblasting tube winding device of the sandblasting equipment forms a rotating whole with the sandblasting machine. The sandblasting tube is wound in the sandblasting tube winding device, which can provide a long sandblasting tube for long-distance sandblasting operations. Only air flows in the air supply slip ring that supplies air to the sandblasting equipment, without sand, which is conducive to the long-term stable operation of the air supply slip ring. Even if there is a drastic right-angle change in the airflow direction in the air supply slip ring, it will not reduce the life of the air supply slip ring. After the airflow carrying diamond enters the sandblasting tube, it continues to flow in the sandblasting tube without the need for a slip ring connection, which reduces the complexity of the sandblasting tube connection, improves the reliability of the system operation, extends the service life of the sandblasting equipment, and reduces the consumption of spare parts and maintenance workload. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structural principle of a sandblasting device according to Embodiment 1 of the present invention. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the structural principle of a sandblasting device according to Embodiment 1 of the present invention. Figure 2 .

[0019] Figure 3 This is a schematic diagram of the structural principle of a sandblasting device according to Embodiment 2 of the present invention.

[0020] Figure 4 This is a schematic diagram of the structural principle of a sandblasting device according to embodiment 3 of the present invention.

[0021] Figure 5 This is a schematic diagram of the structural principle of a sandblasting device according to Embodiment 4 of the present invention.

[0022] In the diagram: 10. Frame; 11. Support leg; 12. Winding disc motor; 120. Drive wheel; 121. Gear; 122. Gear ring; 13. Winding disc bearing seat; 130. "V" shaped roller; 14. Air supply slip ring; 15. Air supply pipe; 160. Oscillating motor; 161. Oscillating screw; 162. Guide rail; 163. Guide seat; 171. Guide roller bearing seat; 172. Guide roller; 18. Auxiliary sand loading frame; 180. Bag receiving plate; 181. Foot pedal; 20. Winding disc shaft; 21. Driven wheel; 22. Belt; 23. Air supply connection pipe connector; 24. Power supply slip ring; 240. Air supply and power supply slip ring; 3. Winding disc; 40. Air supply connection pipe; 401. Air distributor; 41. Sand valve; 42. Air control valve; 43. Sandblasting pipe; 44. Sandblasting gun connector; 50. Sand can; 51. Sand can support leg; 510. Sand can support platform; 52. Vibrator. Detailed Implementation

[0023] The following examples, in conjunction with the illustrations, provide several specific embodiments of a sandblasting device according to the present invention. These embodiments are merely illustrative examples of the present invention and do not constitute a limitation on the claims of the present invention. Any aspects not covered in the present invention are applicable to the prior art.

[0024] Embodiment 1 of the sandblasting device of the present invention (e.g.) Figure 1 , 2 As shown):

[0025] A sandblasting device includes a frame 10, a sandblasting pipe retraction device, a sandblasting machine, a sandblasting pipe 43, and an air supply slip ring 14.

[0026] The frame 10 is a horizontal plate structure with vertical support legs, used to install the other parts of the sandblasting device on the horizontal plate. Of course, it is not excluded that the frame can be a frame structure. Any structure that can provide support can be used as a frame.

[0027] The sand blasting pipe winding and unwinding device includes a winding disc 3, a winding disc driving component, and a winding disc guiding component. The winding disc shaft 20 passing through the middle of the winding disc 3 is a hollow shaft. The upper and lower baffles of the winding disc 3 are welded or assembled with the winding disc shaft 20 to form an integral "dry" - shaped rotating component or assembly, which has two upper and lower circular (non - circular shapes such as polygons are not excluded) baffles. The rotation center of the winding disc 3 is along the vertical direction. The winding disc bearing seat 13 is installed on the frame 10, and the bearing arranged inside the winding disc bearing seat serves as the winding disc guiding component. The winding disc 3 is assembled through the shaft end at the lower part of the winding disc shaft 20 into the bearing inside the winding disc bearing seat 13. A double - row angular contact ball bearing is arranged in the winding disc bearing seat, which can bear the force in the vertical direction on the one hand and the radial force on the other hand. Of course, a thrust bearing for bearing the force in the vertical direction and a combination of bearings for bearing the radial force can also be set. The winding disc driving component includes a winding disc motor 12 installed on the frame, a driving wheel 120 installed on the shaft of the winding disc motor 12, a driven wheel 21 installed on the winding disc shaft 20, and a belt 22. The winding disc motor 12 drives the winding disc 3 to rotate along with the winding disc shaft 20 through the belt 22.

[0028] The air supply slip ring is a commonly used rotating air supply component, generally composed of two relatively rotating parts. The rotation center of the air supply slip ring 14 coincides with the rotation center of the winding disc shaft 20. The rotating part of the air supply slip ring 14 is installed at the lower end of the winding disc shaft 20, and the lower end of the winding disc shaft 20 is closed. The non - rotating part of the air supply slip ring 14 is connected to the air source pipe 15 that supplies air to the sand blasting device.

[0029] The sand blaster is the same as a common sand blaster, which includes a sand tank 50 and a sand valve 41. The sand tank 50 is installed on the winding disc 3 through sand tank support legs 51. The manual sand valve 41 is installed below the sand tank 50. One end of the air supply connecting pipe 40 is connected to the sand valve 41, and the other end is connected to the top end of the winding disc shaft 20 through an air supply connecting pipe joint 23. The sand blasting pipe 43 connected to the outlet of the sand valve 41 passes through the upper circular baffle of the winding disc 3 and then winds around the winding disc 3. When the sand blasting pipe 43 winds around the winding disc 3, it winds layer by layer from the inside to the outside. The upper and lower circular baffles of the winding disc 3 limit the winding height range of each layer of the sand blasting pipe 43. In order to more clearly show the structure of the winding disc 3, Figure 2 the sand blasting pipe 43 wound around the winding disc 3 is not drawn in the figure. After the sand blasting pipe 43 passes through the baffle of the winding disc 3, it can be wound around the winding disc 3.

[0030] The frame 10 of the sandblasting device is equipped with a guide seat 163 that reciprocates in the direction of a plumb bob. The sandblasting pipe unwinds from the winding disc 3 and passes through the guide seat 163. The guide seat 163 controls the height position of the sandblasting pipe 43 in the plumb bob direction when it is wound into or unwound from the winding disc 3. The sandblasting pipe 43 can be wound layer by layer when it is wound into the winding disc 3. The guide seat 163 is mounted on a slider that slides along the guide rail 162 in the direction of the plumb bob. The oscillating motor 160 drives the oscillating screw 161 to rotate, causing the guide seat 163 to reciprocate in the direction of the plumb bob. In addition to the guide seat guidance and driving form used in this embodiment, there are many other implementation forms of this reciprocating motion mechanism, such as belt-driven reciprocating, crank-slider reciprocating, etc. Any form that can satisfy the function of guiding the movement of the sandblasting pipe can be used.

[0031] Based on the above structure, the working principle of the sandblasting machine is as follows: the air supply slip ring 14 has an outer air intake and inner air outlet structure. The air source from the external air compressor enters the air supply slip ring 14 through the air source pipe 15, and then the compressed air enters the winding disc shaft 20. Since the winding disc shaft 20 is hollow inside and the lower end is closed, the compressed air enters the top of the winding disc shaft 20 through the hollow part of the winding disc shaft 20, which is the center top of the winding disc 3. It then enters the sand valve 41 through the air supply connection pipe joint 23 and the air supply connection pipe 40, and exits through the sand valve 41. The incoming high-speed compressed air carries sand. The mixture of compressed air and sand flows through the sandblasting pipe 43 to the sandblasting gun connector 44. The sandblasting gun is connected to the sandblasting gun connector 44 to carry out sandblasting. When it is necessary to release the sandblasting pipe, the winding disc motor 12 drives the winding disc shaft 20 and the winding disc 3 to rotate through the belt, releasing the sandblasting pipe 43 wound on the winding disc 3. When it is necessary to wind the sandblasting pipe, the winding disc motor 12 rotates in the opposite direction to pull the sandblasting pipe back, which is then guided by the guide seat 163 to wind onto the winding disc 3.

[0032] The sandblasting machine is installed above the sandblasting pipe retraction device. During the sandblasting process, when the sandblasting pipe is retracted, the sandblasting machine rotates together with the sandblasting pipe retraction device. After the sandblasting pipe comes out of the sand valve, it does not need to go through complex connection links such as rotary joints, which helps to reduce the number of wear parts. In addition, since the sand tank is generally round, even when rotating, it does not affect the sand adding operation and sandblasting work.

[0033] Embodiment 2 of the sandblasting device of the present invention (e.g.) Figure 3 As shown):

[0034] The difference between this embodiment and Embodiment 1 is that:

[0035] To better control the sandblasting quality, an air control valve 42 is added to the outlet of the manual sand valve 41. The sandblasting pipe at the outlet of the air control valve 42 is wound onto the winding disc 3. To facilitate the flow of sand in the sand box and sand valve 41 within the sand tank 50, a pneumatic vibrator 52 is installed on the outer surface of the sand tank 50. This is a common configuration for sandblasting machines. To supply air to the vibrator 52 and the air control valve 42, compressed air from the air supply connection pipe joint 23 first enters the air distributor 401, and then connects from the air distributor 401 to the inlet of the sand valve 41, the air supply port of the vibrator 52, and the air supply port of the air control valve 42. If compressed air needs to be introduced into the sand tank 50, it also needs to be introduced into the sand tank 50 through the air distributor 401. Of course, it is not ruled out that standard parts such as tees and quick couplings can be used to replace the air distributor 401 for distributing and connecting compressed air.

[0036] A power supply slip ring 24 is installed on the winding disc shaft 20. The power supply slip ring is a commonly used rotary power supply component, generally composed of two relatively rotating parts. It is used to introduce control signals or power to the rotating parts. The rotating part of the power supply slip ring 24 is mounted on the winding disc shaft 20 and rotates together with the winding disc 3. The wire connected to the rotating part of the power supply slip ring 24 passes through the cavity inside the winding disc 3 and connects to a solenoid valve installed therein. This solenoid valve controls the supply or cut-off of air to the vibrator 52, the air control valve 42, and the sand tank 50. Even the air supply to the sand valve 41 can be controlled by the solenoid valve, thereby controlling the start and stop of sandblasting. (For simplification, the diagram is omitted.) Figure 3 The air supply pipes from the air distributor 401 to the vibrator 52, the air control valve 42, and the sand tank 50 are not shown in the drawing.

[0037] To better control the state of the sandblasting pipe 43 and ensure its stability within the guide seat 163, a guide roller 172 is installed between the winding disc 3 and the guide seat 163. The guide roller 172 is a rotatable cylindrical tube or cylindrical component, with its length direction parallel to the rotation center line of the winding disc 3. The guide roller bearing seat 171 is mounted on the frame 10, and the guide roller 172 is installed in a bearing within the guide rail bearing seat. On one hand, the guide roller 172 can cooperate with the guide seat 163 to press down the sandblasting pipe 43. On the other hand, when the sandblasting pipe 43 is wound onto or released from the winding disc 3, the sandblasting pipe 43 will drive the guide roller 172 to rotate due to friction. By installing a detection device similar to a code disk on the guide roller 172, the length of the sandblasting pipe 43 wound or released can be measured. Alternatively, an additional guide roller can be added on the side of the sandblasting pipe away from the guide seat 163, meaning there is one guide roller on each side of the guide seat 163. This better restricts the position of the sandblasting pipe within the guide seat 163. While it's possible that the guide rollers might not rotate, resulting in frictional relative movement between the sandblasting pipe and the guide rollers, which could wear down the outer surface of the sandblasting pipe, the structure is simpler. The guide rollers don't need to be mounted on the frame via bearings; only a plate-like or tubular component needs to be fixed. In fact, this method of guiding the sandblasting pipe using the guide seat 163 and guide rollers to achieve layered winding is a common application, found on many devices requiring layered winding or reciprocating motion.

[0038] Embodiment 3 of the sandblasting device of the present invention (e.g.) Figure 4 As shown):

[0039] The difference between this embodiment and Embodiment 2 is that:

[0040] In this embodiment, the top of the winding disc shaft 20 extends upward through the winding disc 3. The winding disc 3 and the winding disc shaft 20 are assembled as a single unit, with the winding disc shaft 20 being a part of the winding disc 3, making the winding disc resemble a "well" shape. The sandblasting machine is installed at the top of the winding disc shaft 20. An air-power supply slip ring 240 is used instead of the power supply slip ring 24 and the air supply slip ring 14. The air-power supply slip ring 240 is installed near the top of the winding disc shaft 20. Electricity and air are transmitted simultaneously on one slip ring, and both air and electricity enter and exit from the outside. That is to say, the air inlet, air outlet, wire inlet, and wire outlet are all on the outside of the air-power supply slip ring 240. Figure 4The upper half of the air supply and power supply slip ring 240 rotates with the winding disc shaft 20, and the air outlet and wiring are located in this section. The lower half of the air supply and power supply slip ring 240 is a non-rotating section, and the air inlet and wiring are located in this section. Although the air supply slip ring and power supply slip ring in the embodiment are both installed on the winding disc shaft 20, it is not excluded that the air supply slip ring and power supply slip ring can be directly installed on the edge of the upper or lower circular baffle of the winding disc 3, or even on the outside of the circular cross-section sand tank, as long as they are concentric with the rotation center of the winding disc 3 and can transmit compressed air and electricity to the rotating part. The sandblasting pipe from the pneumatic control valve 42 passes through the inner hole of the winding disc shaft 20, passes through the air supply and power supply slip ring 240, and reaches the winding disc 3, without interfering with the air source pipe 15 during rotation.

[0041] To facilitate adding sand to the sand jar 50, an auxiliary sand loading rack 18 is installed on the frame. A foot pedal 181 is installed in the middle of the auxiliary sand loading rack 18. A bag-supporting plate 180, which is higher than the top of the sand jar 50, is installed on the top of the auxiliary sand loading rack 18. The bag-supporting plate 180 is a plate with holes. The holes on the bag-supporting plate 180 are the same shape as the sand jar 50 (generally circular) and concentric. The size of the holes is slightly smaller than the top view size of the sand jar 50. When sand needs to be added, the sand bag is placed on the bag-supporting plate 180, and the weight of the sand bag is borne by the bag-supporting plate 180. Then, the sand is poured into the sand jar 50, which helps to reduce the impact on the sand jar and keep the sand jar stable. If a higher position is needed, the feet can be placed on the foot pedal 181.

[0042] Embodiment 4 of the present invention: a sandblasting device (e.g.) Figure 5 As shown):

[0043] Although the foregoing embodiments all involve assembling the winding disc shaft 20 into a bearing within the winding disc bearing housing 13 as a rotation guide, it is not excluded that rotation can be guided by other rotating parts, for example... Figure 5 The winding disc in the middle adopts an "I" shape. The winding disc 3 does not have a winding disc shaft 20 extending from the bottom. More than two ( ) are used on the outer side of the upper and lower circular baffles of the winding disc 3. Figure 5 Four "V"-shaped (or "H"-shaped) rollers 130 are used as guide components for the winding disc, guiding and limiting the rotation of the winding disc around its rotation axis. Since the outer sides of the upper and lower circular baffles of the winding disc 3 are engaged in the grooves of the "V"-shaped (or "H"-shaped) rollers 130, the spatial position of the winding disc 3 is limited, leaving it only with the freedom to rotate around its center. The support shafts of the "V"-shaped rollers are mounted on the frame. The winding disc motor 12 drives the winding disc 3 to rotate by meshing a gear 121 mounted on its shaft end with a gear ring 122 mounted under the lower circular baffle of the winding disc 3.

[0044] Of course, the rotation of the winding disc can also be guided by limiting the sand tank 50 of the sandblasting machine, or the lower part can still be guided by the winding disc shaft 20 and bearing, and the upper part can be guided by the upper or lower circular baffle. As long as the winding disc 3 can be guided to achieve the rotation requirement, and the rotating parts do not interfere with the fixed parts during the rotation process, it is acceptable.

[0045] The driving devices in all embodiments can be replaced with common components and mechanisms with the same function, such as cylinders, linear motors, rotary motors with lead screws, motors with cam push rods, electromagnets, etc., all of which can achieve motion drive. Guiding can be achieved using optical axes, sliders, or linear guides, etc. These are all common knowledge in the art and will not be elaborated further. This invention is not limited to the embodiments discussed above. Those skilled in the art can deduce other variations based on this invention, and these variations also fall within the scope of this invention.

Claims

1. A sandblasting device, characterized in that It includes a frame, a sand blasting pipe retracting and extending device, a sand blaster, a sand blasting pipe, a gas supply slip ring and a power supply slip ring. The sand blasting pipe retracting and extending device includes a winding disc, a winding disc driving component and a winding disc guiding component. The winding disc is installed on the frame through the winding disc guiding component. The rotation center of the winding disc is along the vertical direction. The winding disc driving component drives the winding disc to rotate around the rotation center of the winding disc. The sand blaster includes a sand tank and a sand valve. The sand blaster is installed on the sand blasting pipe retracting and extending device and rotates together with the sand blasting pipe retracting and extending device. One end of the sand blasting pipe is connected to the sand valve of the sand blaster, and the sand blasting pipe is wound around the winding disc. The rotation center of the gas supply slip ring coincides with the rotation center of the winding disc. The rotating part of the gas supply slip ring rotates together with the winding disc. The non-rotating part of the gas supply slip ring is connected to the gas source pipe for supplying gas to the sand blasting device. The gas outlet of the rotating part of the gas supply slip ring is connected to the components of the sand blaster that require gas supply. The rotating part of the power supply slip ring rotates together with the winding disc. The non-rotating part of the power supply slip ring is connected to the electrical signal wire or power supply wire for supplying power to the sand blasting device externally. The outgoing wire of the rotating part of the power supply slip ring is connected to the rotating component of the sand blasting device.

2. The sandblasting device according to claim 1, characterized in that When the sand blasting pipe is wound around the winding disc, it is wound layer by layer from the inside to the outside.

3. The sandblasting device of claim 1, wherein The sand valve includes a manual valve, a pneumatic control valve or both.

4. The sandblasting device of claim 1, wherein The winding disc is in the shape of "工", "干" or "井", and the winding disc has upper and lower baffles.

5. The sandblasting device of claim 1, wherein On the frame of the sand blasting device, a guiding seat that reciprocates in the vertical direction is installed, and the sand blasting pipe passes through the guiding seat.

6. The sandblasting device of claim 1, wherein On the frame of the sand blasting device, a guide roller in the vertical direction is installed beside the guiding seat. The guide roller is a rotatable circular rod-shaped component.

7. The sandblasting device of claim 1, wherein The sand blaster includes a vibrator.

8. The sandblasting device of claim 1, wherein The frame includes an auxiliary sand loading rack. A horizontal foot pedal is provided at the middle height position of the auxiliary sand loading rack. A bag supporting plate higher than the top end of the sand tank is provided at the top of the auxiliary sand loading rack. The bag supporting plate is a plate with holes. The holes on the bag supporting plate are the same as and concentric with the outer shape of the sand tank.

Images