Online roller shot blasting machine and online roller shot blasting system

Abstract

A kind of on-line cylinder shot blasting machine and on-line cylinder shot blasting system, inner door is arranged on the existing cylinder cylindrical side wall, and inner door is driven to open or close along the direction of cylinder axis by automatic door mechanism arranged on shell, automatic door mechanism includes outer door corresponding to the position of inner door arranged on shell, outer door is slidably arranged on the outer side of inner door on shell, and its opening direction is same with inner door, while outer door is connected with the free end of linear driving element by connecting rod assembly, and the fixed end of linear driving element is connected at the top of shell, and inner side of outer door drives inner door to open or close simultaneously by linkage assembly when opening or closing door.Linkage assembly uses two linkage shafts spaced apart and extending to the direction of inner door, and roller is rotatably connected on linkage shaft.By controller, the above-mentioned automatic door mechanism realizes on-line automatic operation of on-line cylinder shot blasting machine, improves the automation of shot blasting work, so as to reduce the consumption of human resources, and improve production efficiency.

Description

Technical Field

[0001] This invention relates to the field of surface treatment machinery technology, specifically to an inline drum shot blasting machine. Background Technology

[0002] Rotary drum shot blasting machines primarily utilize a high-speed rotating impeller to propel shot onto continuously tumbling workpieces within the drum, achieving a cleaning purpose. The integrated automatic rotary drum shot blasting machine employs a horizontally rotating drum to carry and tumble the workpieces. Shot blasters are installed at both ends of the drum, using a dual-camera system to ensure uniform shot blasting of the workpieces inside the drum. This results in a large shot blasting coverage area, high efficiency, and excellent shot blasting effect.

[0003] However, most shot blasting machines currently on the market have a manually openable door at one end and a shot blaster at the other, which cannot achieve in-line automatic shot blasting, and they only have one shot blaster, resulting in low surface treatment efficiency. Existing in-line automatic shot blasting is usually achieved using crawler-type shot blasting machines, and there are two main types of feeding tracks for crawler-type shot blasting machines: one is made of rubber material, and the other is a plate chain structure made of steel plate. Both types of shot blasting machines have their disadvantages: rubber tracks are easily cut by the shot and have a short service life; plate chain tracks are prone to the problem of waste material getting stuck in the gaps between the plates and chains, damaging the workpiece being shot blasted.

[0004] Therefore, we optimized the existing inline drum shot blasting machine to overcome the shortcomings of the existing inline drum shot blasting machine and crawler shot blasting machine, and realized inline automatic shot blasting production. Summary of the Invention

[0005] To address the problems and shortcomings of existing technologies, this invention provides a combined drum shot blasting machine and a combined drum shot blasting system.

[0006] The technical solution of this invention is as follows:

[0007] A line-connected drum shot blasting machine includes a drum, a drive unit, a shot blaster, and a housing. The drum has an inner feeding port on its arc-shaped sidewall, and an inner door that can slide open along the drum axis is provided outside the inner feeding port. The edge of the inner door facing the opening side has an upward-facing flange.

[0008] An automatic door mechanism is provided on the outer shell at the position corresponding to the inner door, which is used to drive the inner door to slide outward along the roller axis to open or close.

[0009] The inner side of the outer shell is provided with a limiting ring that fits around the outer ring of the roller. The limiting ring is located outside the inner door when it is closed. When the inner door rotates with the roller, it slides with the outer edge of the inner door and has a notch with the same arc length as the inner door for opening the inner door.

[0010] A hopper is located below the drum, and a vibrating screen is located below the hopper. The vibrating screen is used to separate workpieces and shot. The vibrating screen is divided into upper and lower layers by a middle screen; the upper layer is used to filter workpieces, and the lower layer is used to filter shot.

[0011] The automatic door opening mechanism includes: a linear drive element, a linkage assembly, an outer door, and a linkage assembly; the linear drive element is fixed on the top of the housing, and its free end extends outward along the roller axis. An outer loading port is provided at the corresponding position of the housing and the inner loading port. An outer door that can open in the same direction as the inner door is provided outside the outer loading port. The outer door is connected to the free end of the linear drive element through the linkage assembly. A linkage assembly that can drive the inner door to open or close is provided on the side opposite to the inner door.

[0012] The linkage assembly includes two spaced linkage shafts that extend radially from the inside of the outer door toward the inner door. Rollers are coaxially connected to the linkage shafts, and the distance between the two rollers is set as follows: when the inner door is opened, the two rollers can drive the inner door flange to move outward; when the inner door is closed, the inner door flange can rotate around the roller axis and pass through the gap between the two rollers.

[0013] According to a specific embodiment, guide flanges are provided on both sides of the inner door's flange in the thickness direction. The roller has guide grooves that mate with the guide flanges, and the inner side of the limiting ring has a guide groove that mates with the inner door's flange. When the inner door is closed, as it rotates around the roller axis with the roller, the guide flanges on the inner door's flange engage with the guide grooves on the limiting ring to ensure the inner door's positional accuracy and prevent it from moving outwards during rotation, thus avoiding automatic opening during operation.

[0014] According to a specific embodiment, the upper and lower edges of the outer feed port are provided with upper and lower guide rails parallel to the roller axis, and the outer door is slidably opened between the upper and lower guide rails.

[0015] Furthermore, the upper part of the outer door slides along the upper guide rail via rollers.

[0016] According to a specific embodiment, the length of the upper guide rail is greater than the length of the lower guide rail. The inner door is slidably connected to the roller via the inner door guide rail and can be opened outward and moved to the outside of the outer casing under the drive of the automatic door mechanism. The outer casing has inner door brackets at both ends for supporting the inner door in the open state, located on the extension line of the inner door sliding outward. The ends of these brackets are aligned with the upper guide rail, facilitating the movement of the inner and outer doors to the outside of the shot blasting machine's outer casing when both are open, thus maximizing the loading opening for shot blasting.

[0017] According to a specific embodiment, there are two symmetrical inner doors and two sets of symmetrical automatic door mechanisms, which are used to drive the two inner doors to slide open in opposite directions or slide close in opposite directions.

[0018] According to a specific embodiment, the linear drive unit has limit detection elements at both ends, and an angular position sensor is provided on the roller. The limit detection unit is used to detect whether the outer door is open or closed at a predetermined position, thereby ensuring that the door is open when loading and closed when working. The angle sensor can be an absolute encoder, used to detect whether the inner loading port is aligned with the outer unloading port or at the bottom unloading position.

[0019] To facilitate the feeding of workpieces into the inline drum shot blasting machine, the inner feed port is located on the upper part of the drum, with an angle of 30°-90° between it and the horizontal plane containing the drum axis.

[0020] To improve shot blasting efficiency, a shot blaster is installed at each end of the drum.

[0021] The present invention also discloses an inline drum shot blasting system, comprising:

[0022] The aforementioned inline drum shot blasting machine;

[0023] A buffer hopper is located upstream of the inline drum shot blasting machine. It has a hopper gate and a weighing sensor. The hopper gate is controlled by an opening and closing mechanism to selectively feed workpieces into the inline drum shot blasting machine.

[0024] The feeder, located upstream of the buffer hopper, is used to transport the workpieces to be processed into the buffer hopper;

[0025] The elevator and separator are located downstream of the inline drum shot blasting machine. One end of the elevator is connected to the vibrating screen of the inline drum shot blasting machine, and the other end is connected to the separator. The shot outlet of the separator is optionally connected to the feeder through the shot valve, and the dust outlet is connected to the dust collector.

[0026] The controller connects to the driver, feeder, buffer hopper, drum shot blasting machine, elevator, separator, and dust collector. The driver connects to the linear drive element. The controller controls the feeder to convey workpieces to the buffer hopper and receives the weight signal from the buffer hopper. It also controls the feeding of workpieces to the inline drum shot blasting machine. The driver controls the opening and closing of the outer door of the inline drum shot blasting machine through the linear drive element, thereby controlling the opening and closing of the inner door through the linkage component. The drum is also equipped with an angular displacement sensor to detect whether the inner feeding port is in the feeding or unloading position.

[0027] The beneficial effects of this invention are:

[0028] The existing inline drum shot blasting machine structure is improved by installing an inner door on the existing cylindrical side wall of the drum. The inner door is driven to open or close along the drum axis by an automatic door mechanism installed on the outer shell.

[0029] The automatic door mechanism includes an outer door that is located on the outer shell and corresponds to the position of the inner door. The outer door is slidably opened and located outside the inner door on the outer shell, and its opening direction is the same as that of the inner door. At the same time, the outer door is connected to the free end of a cylinder or electric cylinder through a linkage assembly. The fixed end of the cylinder or electric cylinder is fixedly connected to the top of the outer shell. The inner side of the outer door drives the inner door to open or close simultaneously when the door is opened or closed through a linkage assembly.

[0030] The linkage assembly employs two spaced-apart linkage shafts extending towards the inner door, and rollers rotatably connected to these shafts. When the inner door needs to be opened or closed, the flange on the inner door inserts into the gap between the two rollers, thus simultaneously opening or closing the inner door when the outer door opens or closes. When the drum needs to rotate for shot blasting, the inner and outer doors can separate, maintaining the drum's independence. Furthermore, a limiting ring is provided on the outer casing of the drum, fixedly connected to the outer shell via a connector. This ensures that when the drum rotates, the inner door always slides in contact with the inner side of the limiting ring, preventing the inner door from automatically opening during operation and causing an accident.

[0031] Limit detection elements are also installed at both ends of the cylinder or electric cylinder to accurately detect the opening and closing status of the door, thereby accurately controlling the opening or closing of the buffer hopper door. In addition, an angular displacement sensor is installed on the drum to detect the position of the inner loading port of the drum door, so as to accurately locate whether the inner loading port has rotated to the position facing the hopper below the drum, thus enabling automatic unloading after the workpiece has been shot blasted.

[0032] The automatic door mechanism, controlled by a controller, enables the automated operation of the inline drum shot blasting machine, improving the automation of shot blasting work, thereby reducing manpower consumption and increasing production efficiency. Furthermore, unlike tracked shot blasting machines, it avoids issues such as cut tracks or waste material getting stuck in the chain plates, thus extending service life and reducing maintenance costs. Attached Figure Description

[0033] Figure 1 This is a cross-sectional view of an embodiment of a continuous drum shot blasting machine;

[0034] Figure 2 A perspective view of an embodiment of a line-connected drum shot blasting machine;

[0035] Figure 3 This is a 3D view of the roller;

[0036] Figure 4 A perspective view of an embodiment of a line-connected drum shot blasting machine with the door open;

[0037] Figure 5 for Figure 4 A detailed enlarged view of the front view of the automatic door mechanism;

[0038] Figure 6 for Figure 4 A magnified view of the left side of the automatic door mechanism;

[0039] Figure 7 A magnified view of a portion of the linkage component;

[0040] Figure 8 for Figure 3 A magnified view of a portion of the middle limiting ring;

[0041] Figure 9 A schematic diagram from a first-person perspective of an inline drum shot blasting system;

[0042] Figure 10 This is a schematic diagram from a second perspective of an inline drum shot blasting system.

[0043] 10. Feeder; 20. Buffer hopper; 30. Unloading mechanism; 40. Elevator; 50. Separator; 60. Dust collector; 1. Base; 2. Drive mechanism; 3. Drum; 4. Shot blaster; 5. Housing; 6. Automatic door mechanism; 7. Hopper; 8. Vibrating screen; 31. Inner door guide rail; 32. Inner door; 51. End side plate; 52. Opening side plate; 53. Limiting ring; 61. Cylinder; 62. Connecting rod; 63. Upper guide rail; 64. Outer door; 65. Lower guide rail; 66. Inner door bracket; 67. Linkage assembly; 671. Linkage shaft; 672. Roller. Detailed Implementation

[0044] The technical means adopted to achieve the intended purpose of the present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0045] See Figure 1 Figure 2 and Figure 4 As shown, a line-connected drum shot blasting machine includes a base 1, a drum 3, a drive unit, a shot blaster 4, and a housing 5. The drive unit is connected to the base 1 and includes a motor, a drive shaft, and a drive wheel. The outer ring of the drum 3 is in frictional rolling engagement with the drive shaft, and the drive wheel drives the drum 3 to rotate. The shot blaster 4 is located at one axial end of the drum 3, and the housing 5 is located on the outer side of the drum 3. (See also...) Figure 4 As shown, it includes a fixed side plate disposed at the top and an open side plate 52 connected to the fixed side plate, and end side plates 51 connected to both sides of the open side plate 52.

[0046] See Figure 3 The upper half of the arc-shaped sidewall of the roller 3 is provided with an inner feeding port, and an inner door 32 that can be slidably opened along the axis of the roller 3 is provided outside the inner feeding port. The edge of the inner door 32 facing the opening side is provided with an upward flange.

[0047] See Figure 2 and Figure 4An automatic door mechanism 6 is provided on the outer shell 5 at a position corresponding to the inner door 32, which is used to drive the inner door 32 to slide outward along the axis of the roller 3 to open or close.

[0048] See Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The automatic door opening mechanism includes: a linear drive element 61, a linkage assembly 62, an outer door 64, and a linkage assembly 67; see also Figure 2 and Figure 4 The linear drive element 61 is fixed to the top of the housing 5, with its free end facing outward and extending in a direction parallel to the axis of the roller 3. An outer feed port is provided on the housing 5 at a position corresponding to the inner feed port. An outer door 64, which can open in the same direction as the inner door 32, is provided outside the outer feed port. The outer door 64 is connected to the free end of the linear drive element 61 via a connecting rod 62 assembly. (See [reference]). Figure 5 Inside, on the side opposite to the inner door 32, there is a linkage component 67. The linkage component 67 is used to cooperate with the flange of the inner door 32 to drive the inner door 32 to slide outward and open.

[0049] See Figure 7 The linkage component 67 includes two spaced linkage shafts 671. The linkage shafts 671 are perpendicular to the outer door 64 and extend radially toward the inner door 32. Rollers 672 are coaxially rotatably connected to them. The spacing between the two rollers 672 is set as follows: when the inner door 32 is driven to open, the two rollers 672 can drive the inner door 32 to move outward; when the inner door 32 is closed, the inner door 32 can rotate around the axis of the roller 3 and pass through the gap between the two rollers 672.

[0050] See Figure 3 The inner side of the outer casing 5 is provided with a limiting ring 53 that fits around the outer ring of the roller 3. The limiting ring is located outside the inner door 32 when it is closed, and slides in cooperation with the outer edge of the inner door 32 when the inner door 32 rotates with the roller 3. In this embodiment, the limiting ring 53 has a notch with an arc length equal to that of the inner door 32. The limiting ring 53 is connected to the outer casing 5 by a plurality of connecting plates arranged along its axial direction.

[0051] See Figure 1 Below the drum 3 is a hopper 7, and below the hopper 7 is a vibrating screen 8, which is used to separate workpieces and shot. The vibrating screen 8 is divided into upper and lower layers by a middle screen; the upper layer is used to filter workpieces, and the lower layer is used to filter shot.

[0052] See Figure 7 The inner door 32 has guide flanges on both sides in the thickness direction of the flange, and the roller 672 has guide grooves that mate with the guide flanges. See [reference needed] Figure 8The limiting ring 53 has a guide groove on one side that engages with the flange of the inner door 32. After the inner door 32 is closed, as it rotates around the axis of the roller 3 together with the roller 3, the guide flange on the flange of the inner door 32 engages with the guide groove on the limiting ring 53 to ensure the positional accuracy of the inner door 32, while preventing the inner door 32 from moving outward during rotation and avoiding the inner door 32 from opening automatically during operation.

[0053] See Figure 2 and Figure 4 The upper and lower guide rails 63 and 65 are arranged parallel to each other along the axis of the roller 3 at the upper and lower edges of the outer feed port. The outer door 64 is slidably opened and is arranged between the upper and lower guide rails 65, and the upper edge of the outer door 64 is slidably engaged with the upper guide rail 63 through a rolling wheel. In this embodiment, the outer feed port is provided on the opening side plate 52, and the upper guide rail 63 and lower guide rail 65 are fixedly connected to the opening side plate 52 and are respectively located at the upper and lower edges of the outer feed port.

[0054] See Figure 4 The length of the upper guide rail 63 is greater than the length of the lower guide rail 65. (See also...) Figure 3 The inner door 32 is slidably connected to the roller 3 via the inner door guide rail 31, and can be opened outward and moved to the outside of the outer casing 5 under the drive of the automatic door mechanism 6. See [link to relevant documentation]. Figure 4 The outer casing 5 is provided with an inner door bracket 66 for supporting the inner door 32 in the open state. The bracket is located at both ends of the outer casing 5, on the extension line of the inner door 32 sliding outward, and the end is aligned with the upper guide rail 63. This allows the inner door 32 and the outer door 64 to move to the outside of the outer casing 5 of the shot blasting machine when the inner door 32 and the outer door 64 are in the open state, so that the loading opening for shot blasting is as large as possible.

[0055] See 2- Figure 6 Two inner doors 32 are symmetrically arranged, which can move towards each other to close and move away from each other to open along the axis of the roller 3. Two sets of automatic door mechanisms 6 are symmetrically arranged, which are used to drive the two inner doors 32 to open or close respectively.

[0056] Limit detection elements are provided at both ends of the linear drive unit, and an angular position sensor is provided on the roller 3. The limit detection unit is used to detect whether the outer door 64 is open or closed at the set position, thereby ensuring that the door is open when loading and closed when working. The angle sensor can be an absolute encoder, used to detect whether the inner loading port is aligned with the outer unloading port or at the bottom unloading position.

[0057] See Figure 3 and Figure 4 The inner feeding port is located on the upper part of the roller 3, and the angle between it and the horizontal plane where the axis of the roller 3 is located is 30°-90°. In this embodiment, 45° is used.

[0058] To improve shot blasting efficiency, a shot blaster 4 is provided at each end of the drum 3.

[0059] See Figure 9 and Figure 10 The present invention also discloses an inline drum shot blasting system, comprising:

[0060] The aforementioned inline drum shot blasting machine;

[0061] A buffer hopper 20 is located upstream of the inline drum shot blasting machine and has a hopper gate and a weighing sensor. The hopper gate is controlled by an opening and closing mechanism to selectively feed workpieces into the inline drum shot blasting machine.

[0062] The feeder 10 is located upstream of the buffer hopper 20 and is used to transport the workpiece to be processed to the buffer hopper 20.

[0063] The elevator 40 and separator 50 are located downstream of the inline drum shot blasting machine. One end of the elevator 40 is connected to the vibrating screen 8 of the inline drum shot blasting machine, and the other end is connected to the separator 50. The shot outlet of the separator 50 is optionally connected to the feeder 10 through the shot valve, and the dust outlet is connected to the dust collector 60.

[0064] The controller connects to the driver, feeder 10, buffer hopper 20, drum shot blasting machine 3, elevator 40, separator 50 and dust collector 60. The driver is connected to a linear drive element. The controller is used to control the feeder 10 to convey workpieces to the buffer hopper 20 and to receive the weight signal of the buffer hopper 20 to control the delivery of workpieces to the inline drum shot blasting machine. The driver is used to control the opening or closing of the outer door 64 of the inline drum shot blasting machine through the linear drive element, thereby controlling the opening or closing of the inner door 32 through the linkage component 67. The drum 3 is also equipped with an angular displacement sensor to detect whether the inner feeding port is in the feeding position or the unloading position.

[0065] Specifically, in this embodiment, the feeding machine 10 uses a belt conveyor, and the buffer hopper 20 is controlled by a cylinder 61 to open and close the hopper door. The controller can be a PLC controller or a relay, controlled by a control program. The linear drive element uses a cylinder 61, and the driver uses a solenoid valve that communicates with the controller. The elevator 40 uses a common belt bucket elevator 40. The separator 50 uses a drum 3-screen + magnetic separation + air separation structure. The angular displacement sensor uses a Hall encoder connected to the drum 3, and a magnetic receiver is provided on the support on one side of the drum 3.

[0066] When this system is working:

[0067] In the first step, the controller sends control commands to the feeder 10 and the buffer hopper 20 to start the feeder 10 and the buffer hopper 20. The workpiece to be processed is transported to the buffer hopper 20 through the feeder 10. Then, the controller receives the workpiece weight information from the weight sensor in the buffer hopper 20 and controls the feeder 10 to stop working after the workpiece weight reaches the target workpiece weight.

[0068] The second step is for the controller to send control commands to the elevator 40, separator 50 and dust collector 60, and start the dust collector 60, separator 50 and elevator 40 in sequence.

[0069] Third, the controller sends a control command to the inline drum shot blasting machine to start the inline drum shot blasting machine. The drive mechanism 2 drives the drum 3 to rotate and receives position information from the angular displacement sensor. When it is detected that the inner door 32's flange has rotated into the gap of the roller 672 of the linkage component 67 and is aligned with the outer door 64, the driver drives the linear drive element to move, causing the outer door 64 to move in the opening direction. At the same time, the outer door 64 clamps the flange of the inner door 32 through the inline assembly, causing the inner door 32 to move and open.

[0070] Fourth, the controller sends a control command to the opening and closing mechanism of the buffer hopper 20 to drive the hopper door to open and put the workpiece into the drum 3.

[0071] In the fifth step, the controller drives the linear drive element to close the outer door 64 and close the inner door 32 in conjunction with the drive mechanism 2. Then, the controller drives the drum 3 to rotate and simultaneously controls the shot valve of the separator 50 to open, allowing the shot to enter the shot blaster 4. The controller then controls the shot blaster 4 to work. After the drum 3 and shot blaster 4 have worked for the set time, the controller repeats the third step to open the inner door 32 and then controls the drum 3 to rotate so that the inner feed port faces downward toward the hopper 7. The workpiece and shot enter the vibrating screen 8 through the hopper 7. The controller controls the elevator 40 to work and transport the shot from the lower layer of the vibrating screen 8 to the separator 50 via the screw conveyor. At the same time, the controller controls the dust collector 60 to remove the dust generated by the separator 50 and controls the unloading mechanism 30 to discharge the workpiece from the upper layer of the vibrating screen 8.

[0072] While performing the above work, repeat step one to feed the workpiece into buffer hopper 20.

[0073] Step 6: Repeat steps 3 to 6 to perform shot blasting on the next group of workpieces until all workpieces have been shot blasted. Then, stop the operation of the feeder 10, buffer hopper 20, inline drum shot blasting machine, elevator 40, separator 50 and dust collector 60.

[0074] The above description represents a preferred embodiment of the present invention. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, all variations, equivalent substitutions, improvements, etc., made without departing from the concept of the present invention should be included within the protection scope of the present invention.

Claims

1. A line-connected drum shot blasting machine, comprising a drum (3), a drive unit, a shot blaster (4), and a housing (5), characterized in that, The roller (3) has an inner feeding port on its arc-shaped sidewall. An inner door (32) that can be slidably opened along the axial direction of the roller (3) is provided outside the inner feeding port. The edge of the inner door facing the opening side has an upward flange. An automatic door mechanism (6) is provided on the outer shell (5) at a position corresponding to the inner door (32) for driving the inner door (32) to slide outward along the roller (3) axis to open or close; The inner side of the outer shell (5) is provided with a limiting ring (53) that is fitted around the outer ring of the roller (3). The limiting ring is located outside the inner door (32) in the closed state. When the inner door (32) rotates with the roller (3), it slides with the outer edge of the inner door (32) and has a notch with the same arc length as the inner door (32) for opening the inner door. A hopper (7) is provided below the roller (3), and a vibrating screen (8) is provided below the hopper (7) for separating workpieces and shot. The automatic door mechanism includes: a linear drive element (61), a linkage assembly (62), an outer door (64), and a linkage assembly (67); the linear drive element is fixed on the top of the housing, and its free end extends outward along the axis of the roller (3). The housing (5) is provided with an outer loading port at a position corresponding to the inner loading port. An outer door (64) that can be opened in the same direction as the inner door (32) is provided outside the outer loading port. The outer door is connected to the free end of the linear drive element (61) through the linkage assembly (62). A linkage assembly (67) that can drive the inner door to open or close is provided on the side opposite to the inner door (32). The linkage component (67) includes two linkage shafts (671) spaced apart. The linkage shafts extend radially from the inner side of the outer door to the inner door, and rollers (672) are coaxially rotatably connected to them. The distance between the two rollers is set as follows: when the inner door (32) is opened, the two rollers (672) can drive the inner door (32) to move outward; when the inner door (32) is closed, the inner door (32) can rotate around the axis of the roller (3) and pass through the gap between the two rollers (672). The inner door (32) has guide flanges on both sides of the flange in the thickness direction, and the roller (672) has guide grooves that cooperate with the guide flanges. The upper and lower edges of the outer feed port are provided with an upper guide rail (63) and a lower guide rail (65) parallel to the axis of the roller (3). The outer door (64) is slidably opened and is arranged between the upper and lower guide rails. The upper edge of the outer door (64) is slidably engaged with the upper guide rail (63) through a rolling wheel. The inner door (32) is slidably connected to the roller (3) via the inner door guide rail (31), and can be opened outward and moved to the outside of the outer shell (5) under the drive of the automatic door mechanism (6). The outer shell is provided with inner door brackets (66) at both ends for supporting the inner door (32) in the open state. The inner door brackets (66) are located on the extension line of the inner door (32) sliding outward. The inner door (32) is provided symmetrically in two sets, and the automatic door mechanism (6) is provided symmetrically in two sets, which are used to drive the two inner doors (32) to slide open in opposite directions or slide close in opposite directions.

2. The inline drum shot blasting machine according to claim 1, characterized in that, The linear drive element (61) is provided with limit detection elements at both ends, and the roller (3) is provided with an angular position sensor.

3. The inline drum shot blasting machine according to claim 1, characterized in that, The inner feeding port is located on the upper part of the drum, and the angle between it and the horizontal plane containing the axis of the drum (3) is 30°-90°.

4. The inline drum shot blasting machine according to claim 1, characterized in that, Each end of the roller (3) is provided with a shot blaster (4).

5. A continuous drum shot blasting system, characterized in that, include: The inline drum shot blasting machine according to any one of claims 1-4; A buffer hopper (20) is located upstream of the inline drum shot blasting machine and has a hopper gate and a weighing sensor. The hopper gate is controlled by an opening and closing mechanism to selectively feed workpieces into the inline drum shot blasting machine. The feeder (10) is located upstream of the buffer hopper (20) and is used to transport the workpiece to be processed to the buffer hopper (20). An elevator (40) and a separator (50) are installed downstream of the inline drum shot blasting machine. One end of the elevator (40) is connected to the vibrating screen (8) of the inline drum shot blasting machine, and the other end is connected to the separator (50). The shot outlet of the separator (50) is selectively connected to the feeder (10) through the shot valve (70), and the dust outlet is connected to the dust collector (60). The controller is connected to the driver and the feeder (10), the buffer hopper (20), the drum (3) shot blasting machine, the elevator (40), the separator (50) and the dust collector (60). The driver is connected to the linear drive element. The controller is used to control the feeder (10) to convey the workpiece to the buffer hopper (20) and receive the weight signal of the buffer hopper (20) to control the delivery of the workpiece to the inline drum shot blasting machine. The driver is used to control the opening or closing of the outer door (64) of the inline drum shot blasting machine through the linear drive element, thereby controlling the opening or closing of the inner door (32) through the linkage component (67). The drum (3) is also equipped with an angular displacement sensor to detect whether the inner feed port is located at the feeding position or the unloading position.

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