A shot blasting machine

Abstract

The present invention relates to a shot blasting machine, comprising a shot blasting motor (2), a power transmission unit (3), a frame (6), a shot hopper (7) and a separation chamber (9), wherein the shot blasting motor (2) is connected to the power transmission unit (3), the frame (6) comprises an impact chamber (601) and a rebound chamber (602) connected in sequence, and the separation chamber (9) is connected to the shot hopper (7); the shot blasting machine further comprises a fan unit (11), the fan unit (11) is connected to the upper end of the separation chamber (9), the cross-sectional area of ​​the rebound chamber (602) gradually decreases from the bottom to the top, and a circular arc section is provided at the top thereof, the circular arc section is connected to the separation chamber (9), a straight pipe section is provided on the side of the separation chamber (9), the straight pipe section is connected to the top opening of the rebound chamber (602), and the bottom is connected to the shot hopper (7). Compared with the prior art, the present invention has the advantages of good dust separation effect, low use cost and convenient use.

Description

Technical Field

[0001] The invention relates to the field of surface shot blasting treatment, in particular to a shot blasting machine. Background Art

[0002] The surface shot blasting process uses high-speed steel shot streams to impact the treated surface to clean the surface materials. It is widely used in large-scale infrastructure projects such as highways, airports, and bridges. Its main processing equipment is a mobile shot blasting machine. Currently, the mobile shot blasting machines on the market are mainly used to treat surfaces such as concrete and asphalt. When treating the surface of steel plates, construction contractors often use shot blasting machines that treat concrete to treat steel plates, which makes it difficult to meet the surface treatment requirements required before the anti-corrosion operation of steel plates.

[0003] The utility model with announcement number CN208528869U discloses a shot blasting machine with a dust removal device, which belongs to the technical field of metal surface treatment equipment. It solves the technical problem of the inconvenience caused by the frequent replacement of filter elements in the prior art. The key points of its technical solution are that it includes a shot blasting machine and a dust removal box. The dust removal box is provided with a dust removal device. The dust removal device includes a dust removal pipe and an exhaust fan. One end of the dust removal pipe is connected to the top of the shot blasting machine, and the other end is connected to the exhaust fan. The exhaust fan is fixedly connected to the top of the dust removal box. A dust collecting hopper is provided in the dust removal box. The ash collecting hopper is vertically fixed at the bottom end of the dust removal box. The upper end of the ash collecting hopper is located in the dust removal box. A material receiving pipe is connected to the dust removal pipe. The material receiving pipe is connected to the ash collecting hopper, so as to facilitate the staff to clean the dust.

[0004] The shot blasting machine with dust removal device has the following disadvantages: 1. It completely relies on the suction force formed by the exhaust fan to absorb dust, which has high requirements on the performance of the exhaust fan; 2. Some dust may be pressed in the shot material and is difficult to be sucked away by the exhaust fan, so the dust removal efficiency is not high; 3. The device is too large and inconvenient to move. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a shot blasting machine with high dust removal efficiency.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A shot blasting machine includes a shot blasting motor, a power transmission unit, a frame, a shot hopper and a separation chamber, wherein the shot blasting motor is connected to the power transmission unit, the frame includes an impact chamber and a rebound chamber connected in sequence, and the separation chamber is connected to the shot hopper; the shot blasting machine also includes a fan unit connected to the upper end of the separation chamber. The fan unit separates dust from the shot flow in the separation chamber, thereby improving the dust separation effect on the shot flow.

[0008] Furthermore, the cross-sectional area of ​​the rebound bin gradually decreases from the bottom to the top, and a circular arc section is provided at the top thereof, which is connected to the separation bin. When the pellet flow containing dust reaches the upper part of the rebound bin, the inertia is reduced, and it is not easy to cause disorderly ejection when turning through the circular arc section.

[0009] Furthermore, a straight pipe section is provided on the side of the separation bin, the straight pipe section is connected to the top opening of the rebound bin, the bottom is connected to the pill hopper, and a separation screen is provided at the connection between the separation bin and the pill hopper. When the pill flow containing dust enters the straight pipe section, the dust is attracted by the fan unit and gradually moves upward, and the pills themselves have a large gravity and gradually move downward, so that the dust separation effect is further improved.

[0010] Furthermore, the discharge port of the pill hopper is connected to the impact bin through a lower pill pipe, and a sand release valve is provided in the lower pill pipe. The sand release valve is driven by a rotating shaft, and the rotating shaft is connected to a pill switch handle installed on the side of the separation bin through a connecting rod.

[0011] Furthermore, an angle is formed between the impact chamber and the rebound chamber, and the angle range is 45 degrees to 85 degrees, which is selected according to the rotation speed of the shot blasting motor, and the preferred angle is 60 degrees.

[0012] Furthermore, the fan unit includes a fan motor, blades and a fan cover, the fan cover is connected to the separation bin, the connection between the fan cover and the separation bin is provided with holes that are interconnected, the fan motor is fixedly mounted on the top of the fan cover, the blades are fixedly mounted on the rotating shaft of the fan motor, and the side shell of the fan cover is provided with an interface for removing dust.

[0013] Furthermore, the shot blasting machine also includes a control cabinet unit arranged on the upper end of the shot blasting motor, and the control cabinet unit controls the shot blasting motor, the fan motor and the travel motor.

[0014] Furthermore, the shot blasting machine also includes a walking unit, which includes a universal wheel and a first walking unit and a second walking unit respectively fixedly installed on both sides of the impact bin, the universal wheel is fixedly connected to the lower part of the rebound bin, and the first walking unit and the second walking unit are both connected to the control cabinet unit.

[0015] Furthermore, the power transmission unit includes a motor pulley, a transmission belt, a pulley, a belt cover, a bearing unit and a shot blasting head unit, wherein the motor pulley is connected to the shot blasting motor, the pulley is connected to one end of the bearing unit, the shot blasting head unit is connected to the other end of the bearing unit, the transmission belt is connected to the motor pulley and the pulley, and the motor pulley, the transmission belt and the pulley are arranged in the belt cover, which has the function of protecting the transmission components. The above power transmission unit is a conventional structure of a shot blasting machine.

[0016] Furthermore, the shot blasting machine also includes a sealing brush unit, which is fixedly installed at the connection between the impact bin and the rebound bin to prevent the shot from leaking out.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) The shot blasting machine of the present invention is provided with a fan unit connected to a separation chamber, and dust of the shot stream is separated in the separation chamber, thereby improving the dust separation effect of the shot stream;

[0019] The cross-sectional area of ​​the rebound bin gradually decreases from the bottom to the top, so that the airflow generated by the external dust collector and the self-installed fan of the shot blasting machine gradually increases in velocity in the rebound bin, which can overcome the reduction in velocity of the rebounded shot in the rebound bin due to its own weight, and ensure that all the rebounded shot can enter the separation bin without falling back to the ground.

[0020] In order to further improve the dust separation effect, an arc section is provided on the upper part of the rebound bin, and a straight pipe section is provided in the separation bin. The straight pipe section is connected to the arc section. When the pellet flow containing dust reaches the upper part of the rebound bin, the inertia is reduced and the pellets with higher density and heavier weight are turned through the arc section to fall onto the screen at the bottom of the separation bin, while the dust with lower density and lighter weight is sucked away by the airflow, thereby realizing the separation of pellets and dust.

[0021] (2) The dust separation effect of the present invention is improved, so that the service life of parts such as the blasting head assembly and the internal guard plate is greatly increased, and the use cost is reduced.

[0022] (3) The shot blasting machine of the present invention is provided with two travel motors. Compared with a mobile shot blasting machine having only one travel motor, its travel, turning and other movements are more flexible, and it is particularly suitable for places such as oil tanks and ship decks where frequent U-turns and turns are required during operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the external structure of the shot blasting machine of the present invention;

[0024] Figure 2 The internal structure and working principle diagram of the shot blasting machine of the present invention;

[0025] Figure 3 It is a schematic diagram of the local structure of the present invention. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0027] Example 1

[0028] like Figure 1 As shown, this embodiment is a shot blasting machine, which is used for the treatment of related surfaces, such as ship decks, bridge steel box girders, oil tanks, wind power towers and other steel surfaces. The shot blasting machine can use hard granular shot as the working treatment medium, such as steel shot, angular steel sand, etc. The shot blasting machine includes a control cabinet unit 1, a shot blasting motor 2, a power transmission unit 3, a travel unit 4, a sealing brush unit 5, a frame 6, a shot hopper 7, a shot filter 8, a separation bin 9, a window 10 and a fan unit 11.

[0029] like Figure 2 As shown, the shot blasting motor 2 is installed on the top of the frame 6 and connected to the power transmission unit 3. The frame 6 includes an impact bin 601 and a rebound bin 602 connected in sequence. The separation bin 9 is connected to the shot hopper 7, and the fan unit 11 is connected to the upper end of the separation bin 9.

[0030] The fan unit 11 includes a fan motor 12, blades 13 and a fan housing 14. The fan housing 14 is connected to the separation bin 9. A circular hole is provided at the bottom of the fan housing 14, which communicates with the circular hole at the top of the separation bin 9 to form an air flow channel. The fan motor 12 is fixedly mounted on the top of the fan housing 14, and the blades 13 are fixedly mounted on the rotating shaft of the fan motor 12. The side shell of the fan housing 14 is provided with an interface 15 for connecting the dust removal pipe.

[0031] The cross-sectional area of ​​the rebound bin 602 gradually decreases from the bottom to the top, and a circular arc section is provided at the top thereof, which is connected to the separation bin 9. A straight pipe section is provided on the side of the separation bin 9, which is connected to the top opening of the rebound bin 602, and the bottom is connected to the pill hopper 7. A pill filter 8 is provided at the connection between the separation bin 9 and the pill hopper 7, and the pill filter 8 includes a separation screen 801. A baffle for guiding the pill flow is also connected to one end of the straight pipe section of the separation bin 9. A window 10 for adding pills into the pill hopper 7 is provided on the side of the separation bin 9.

[0032] The discharge port of the pill hopper 7 is connected to the impact bin 601 through the lower pill pipe 19, and a sand discharge valve 18 is provided in the lower pill pipe 19. The sand discharge valve 18 is driven by a rotating shaft, and the rotating shaft is connected to a pill switch handle 16 installed on the side of the separation bin 9 through a connecting rod 17. Figure 3 An angle is formed between the impact chamber 601 and the rebound chamber 602, and the angle range of the angle is 45 degrees to 85 degrees. The specific angle is selected according to the rotation speed of the shot blasting motor 2. In this embodiment, the angle is set to 60 degrees.

[0033] The power transmission unit 3 includes a motor pulley 301, a transmission belt 302, a pulley 303, a belt cover 304, a bearing unit 305 and a shot blasting head unit 306. The motor pulley 301 is mounted on the motor shaft of the shot blasting motor 2, the pulley 303 is connected to one end of the bearing unit 305, the shot blasting head unit 306 is connected to the other end of the bearing unit 305 through a connector, the transmission belt 302 connects the motor pulley 301 and the pulley 303, the motor pulley 301, the transmission belt 302 and the pulley 303 are arranged in the belt cover 304, the belt cover 304 plays a role in protecting the transmission components, the shot blasting head unit 306 is mounted on the upper part of the impact bin 601, and the rotation axis of the bearing unit 305 coincides with the rotation axis of the shot blasting head unit 306.

[0034] The control cabinet unit 1 is arranged on the upper end of the shot blasting motor 2, and the control cabinet unit 1 is respectively connected to the shot blasting motor 2, the fan motor 12 and the travel unit 4.

[0035] The walking unit 4 includes a universal wheel 20 and a first walking unit 401 and a second walking unit 402 respectively fixedly mounted on both sides of the impact bin 601. The universal wheel 20 is fixedly connected to the rear lower part of the rebound bin 602, and the first walking unit 401 and the second walking unit 402 are both connected to the control cabinet unit 1.

[0036] The sealing brush unit 5 is fixedly installed on the left and right sides of the connection between the impact chamber 601 and the rebound chamber 602 .

[0037] The working principle of the shot blasting machine is described in detail below:

[0038] The electric control cabinet unit 1 controls the start and stop of the shot blasting motor 2 and the fan motor 12 ; the electric control cabinet unit 1 controls the start and stop of the walking unit 4 , and controls the walking speed and the direction of the walking unit 4 .

[0039] The shot blasting motor 2 is started to rotate at high speed, and the motor pulley 301 drives the pulley 303 to rotate through the transmission belt 302. The pulley 303 transmits this rotational motion to the shot blasting head unit 306 through the bearing seat 305, so that the shot blasting head unit 306 rotates at high speed.

[0040] The fan motor 12 is started to drive the impeller 13 to rotate at high speed, thereby generating vacuum suction inside the separation bin 9 and the rebound bin 602 of the shot blasting machine.

[0041] like Figure 2As shown, at this time, the shot switch handle 16 is turned on, and the sand release valve 18 is opened through the connecting rod 17, and the steel shot in the shot hopper 7 will enter the high-speed rotating blasting head unit 306 through the feed pipe 19. The high-speed rotation generates centrifugal force. Due to the effect of the centrifugal force, the shot flies out from the jet port of the directional sleeve of the blasting head unit 306 at high speed to form a high-speed moving shot jet A. The shot jet A impacts the surface to be processed, and the surface material of the surface to be processed is impacted to form a dust flow C, which is mixed in the shot. Due to the impact rebound force and vacuum suction, the rebounded shot flow B and the mixed flow of dust C enter the rebound bin 602 together. When the mixed flow rises to the rebound bin 60 2 and then enter the separation bin 9. Due to the vacuum suction generated by the fan unit 11 and the external dust collector, the dust flow C with low density is sucked into the fan, and discharged from the interface 15 on the fan housing 14, and collected into the dust collecting device of the externally connected dust collector through the dust removal pipe; while the shot flow B with high density and other heavy large particles (generated on the treated surface) cannot be sucked away by the vacuum suction, and fall down due to the gravity, and fall on the separation screen 801. After being filtered by the separation screen 801, the large particles are retained on the screen 801, and the shot falls into the shot hopper 7 through the holes of the separation screen 801, and enters the next shot blasting cycle.

[0042] During the shot blasting operation, the electric control cabinet unit 1 controls the two walking units 4 to move forward, backward, and turn, and can control the walking speed. A universal caster 20 is installed at the rear of the shot blasting machine, which supports the shot blasting machine together with the two walking units 4, so that the entire shot blasting machine can move in any direction.

[0043] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A shot blasting machine, comprising a shot blasting motor (2), a power transmission unit (3), a frame (6), a shot hopper (7) and a separation chamber (9), wherein the shot blasting motor (2) is connected to the power transmission unit (3), the power transmission unit has a blasting head unit (306) located downstream of the shot hopper (7) and upstream of an impact chamber (601) in the direction of the shot jet, the frame (6) comprises an impact chamber (601) and a rebound chamber (602) connected in sequence, the rebound chamber (602) is connected to the separation chamber (9), the separation chamber (9) is connected to the shot hopper (7), and the discharge port of the shot hopper (7) is connected to the impact chamber (601); characterized in that The separation bin is arranged at the top of the shot hopper. The shot blasting machine also includes a fan unit (11), which is connected to the upper end of the separation bin (9). The fan unit (11) includes a fan motor (12), blades (13) and a fan cover (14). The fan cover (14) is connected to the separation bin (9). The connection between the fan cover (14) and the separation bin (9) is provided with holes that are connected to each other. The fan motor (12) is fixedly mounted on the top of the fan cover (14). The blades (13) are fixedly mounted on the rotating shaft of the fan motor (12). The side shell of the fan cover (14) is provided with an interface (15) for removing dust.

2. A shot blasting machine according to claim 1, characterized in that: The cross-sectional area of ​​the rebound chamber (602) gradually decreases from the bottom to the top, and a circular arc section is provided on the top, which is connected to the separation chamber (9).

3. A shot blasting machine according to claim 1, characterized in that: A straight pipe section is provided on the side of the separation bin (9), which is connected to the top opening of the rebound bin (602) and the bottom is connected to the pill hopper (7), and a separation screen (801) is provided at the connection between the separation bin (9) and the pill hopper (7).

4. A shot blasting machine according to claim 1, characterized in that: The discharge port of the pill hopper (7) is connected to the impact bin (601) through a lower pill pipe (19), and a sand release valve (18) is provided in the lower pill pipe (19). The sand release valve (18) is driven by a rotating shaft, and the rotating shaft is connected to a pill switch handle (16) installed on the side of the separation bin (9) through a connecting rod (17).

5. A shot blasting machine according to claim 1, characterized in that: An angle is formed between the impact chamber (601) and the rebound chamber (602), and the angle range of the angle is 45 degrees to 85 degrees.

6. A shot blasting machine according to claim 1, characterized in that: The shot blasting machine further comprises a control cabinet unit (1) arranged on the upper end of the shot blasting motor (2), and the control cabinet unit (1) controls the shot blasting motor (2) and the fan motor (12).

7. A shot blasting machine according to claim 6, characterized in that: The shot blasting machine further comprises a walking unit (4), the walking unit (4) comprising a universal wheel (20) and a first walking unit (401) and a second walking unit (402) respectively fixedly mounted on both sides of the impact bin (601), the universal wheel (20) being fixedly connected to the lower part of the rebound bin (602), and the first walking unit (401) and the second walking unit (402) being both connected to the control cabinet unit (1).

8. A shot blasting machine according to claim 1, characterized in that: The power transmission unit (3) comprises a motor pulley (301), a transmission belt (302), a pulley (303), a belt cover (304), a bearing unit (305) and a shot blasting head unit (306); the motor pulley (301) is connected to the shot blasting motor (2); the pulley (303) is connected to one end of the bearing unit (305); the shot blasting head unit (306) is connected to the other end of the bearing unit (305); the transmission belt (302) is connected to the motor pulley (301) and the pulley (303); and the motor pulley (301), the transmission belt (302) and the pulley (303) are arranged in the belt cover (304).

9. A shot blasting machine according to claim 1, characterized in that: The shot blasting machine further comprises a sealing brush unit (5), which is fixedly mounted at the connection between the impact chamber (601) and the rebound chamber (602).

10. A shot blasting machine according to claim 5, characterized in that: The angle is 60 degrees.

11. A shot blasting machine according to claim 7, characterized in that: The control cabinet unit (1) controls the walking unit (4).

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