Automatic conveying centrifugal shot blasting device

Abstract

The invention relates to the technical field of shot blasting machines, in particular to an automatic conveying centrifugal shot blasting device which comprises a shell, a roller, a roller support, an impeller head, a material receiving groove and a connecting shot conveying unit, the shot conveying unit comprises a shot receiving barrel located at the output end of the material receiving groove, a main shaft, a spiral blade and an outer barrel, and a charging barrel is arranged at the top of the outer barrel; a bowl-shaped shot cavity is formed in the charging barrel, discharging pipes with the same number as the shot blasting devices are arranged at the bottom of the charging barrel, material passing columns with the same number as the discharging pipes are rotationally installed on the charging barrel and coaxially arranged in the discharging pipes, and a driving unit is arranged at the top of the charging barrel. According to the technical scheme, shots are continuously conveyed to the charging barrel from the shot collecting barrel through the spiral blade and then conveyed to the shot blasting device through the discharging pipe, continuous material supplementing of the shot blasting device is achieved, the material passing column rotates around the axis of the material passing column and reciprocates in the axis direction through the driving unit, and it is guaranteed that shots are discharged evenly and smoothly.

Description

Technical Field

[0001] The present invention relates to the technical field of shot blasting machines, and more particularly to an automatic conveying centrifugal shot blasting device. Background Art

[0002] A shot blasting and polishing machine uses a centrifugal shot blasting disc rotating at high speed to throw elastic abrasive grains (also known as shot) onto the surface of a workpiece at a certain speed, thereby achieving surface polishing of the workpiece to improve properties such as the hardness of the workpiece surface. Currently, in existing shot blasting and polishing machines, the replenishment of the centrifugal shot blasting disc is completed by a belt conveying mechanism, that is, the belt conveying mechanism picks up the shot in the lower hopper and sends it into the centrifugal shot blasting disc located above. The shot that enters the centrifugal shot blasting disc is thrown onto the surface of the workpiece under the high-speed rotation of the centrifugal shot blasting disc and finally falls back into the hopper to achieve the purpose of recycling the shot.

[0003] However, in existing shot blasting and polishing machines, since the replenishment is carried out by a belt conveying mechanism, and the belt conveying mechanism is equipped with material scooping blades arranged at a certain distance on a rotary belt that makes a rotary motion in the up and down direction, there is a gap between adjacent two material scooping blades, so continuous and uninterrupted replenishment cannot be carried out to the centrifugal shot blasting disc. As a result, the amount of shot thrown by the centrifugal shot blasting disc varies and the uniformity is poor, thus affecting the polishing quality. Summary of the Invention

[0004] In view of the above problems, it is necessary to provide an automatic conveying centrifugal shot blasting device for the problems in the prior art.

[0005] To solve the problems in the prior art, the technical solution adopted by the present invention is as follows:

[0006] An automatic conveying centrifugal shot blasting device includes a housing, and horizontal drums provided at both ends of the housing. The drums are installed on drum brackets. A plurality of shot blasting machines are provided on the housing, and the output ends of the shot blasting machines communicate with the inside of the housing. An inclined material receiving trough is provided at the bottom of the housing, and the output end of the material receiving trough is connected to a shot material conveying unit. The shot material conveying unit includes a shot receiving cylinder located at the output end of the material receiving trough, and a main shaft vertically rotatably installed in the shot receiving cylinder. A spiral blade is provided on the circumference of the main shaft, and an outer cylinder is coaxially provided outside the main shaft. The spiral blade fits against the inner wall of the outer cylinder. A loading cylinder is provided at the top of the outer cylinder, and the spiral blade conveys the shot in the shot receiving cylinder to the loading cylinder. A bowl-shaped shot cavity is provided in the loading cylinder, and a discharge pipe having the same number as the shot blasting machines is provided at the bottom of the loading cylinder. The discharge pipes are respectively connected to the input ends of the shot blasting machines through pipelines. A material passing column having the same number as the discharge pipes is rotatably installed on the loading cylinder. The material passing column is coaxially arranged in the discharge pipe. A driving unit is provided at the top of the loading cylinder, and the driving unit drives the main shaft and the material passing column to rotate synchronously around their own axes, and at the same time, the material passing column reciprocates along the axial direction.

[0007] Preferably, the discharge pipes are evenly distributed around the axis of the main shaft at the lowest end of the shot material chamber. The main shaft and the material passing column are rotatably installed at the top of the loading cylinder. The driving unit includes a central gear ring and a driven gear ring rotatably installed at the top end of the loading cylinder. The central gear ring is coaxially connected to the main shaft. The number of driven gear rings is the same as the number of material passing columns. The driven gear rings are coaxially connected to the material passing columns and mesh with the central gear ring. A first synchronous gear is coaxially arranged on the central gear ring. The driving unit further includes a second synchronous gear rotatably installed at the top of the loading cylinder and on one side of the central gear ring, a synchronous belt drivingly connecting the first synchronous gear and the second synchronous gear, and a rotary driver fixedly installed on the housing. The working end of the rotary driver is drivingly connected to the second synchronous gear.

[0008] Preferably, spline grooves are provided on the circumferential side of the top of the material passing column. The material passing column is spline-connected to a spline sleeve rotatably installed at the top of the loading cylinder through the spline grooves. The spline sleeve is coaxially arranged with the driven gear ring, and the driven gear ring is sleeved outside the spline sleeve.

[0009] Preferably, a limiting ring is provided at the top of the material passing column. The limiting rings of all the material passing columns are rotatably installed on the lifting disc. A first bevel gear is coaxially arranged at the top of the spline sleeve. The driving unit includes a second bevel gear meshed with the first bevel gear. The second bevel gear is rotatably installed in a fixed seat at the top of the loading cylinder. The axis of the second bevel gear is horizontally arranged. A cam is coaxially installed on the second bevel gear, and the outer wall of the cam is in contact with the bottom of the lifting disc.

[0010] Preferably, a plurality of guide rods extending vertically downward are provided at the bottom of the lifting disc. The guide rods are inserted into guide sleeves provided at the top of the loading cylinder. A spring is sleeved outside the guide sleeve. The spring elastically connects the lifting disc and the loading cylinder, and the elastic force of the spring causes the lifting disc to move downward.

[0011] Preferably, the discharge pipe is composed of a first pipe body and a second pipe body. The diameter of the first pipe body located above is larger than that of the second pipe body. The first pipe body and the second pipe body are connected by a tapered section. The diameter of the material passing column is smaller than the inner diameter of the second pipe body.

[0012] Preferably, a spiral convex block protruding from the outer wall of the material passing column is provided at the bottom end of the material passing column.

[0013] Preferably, a taper gradually decreasing downward is provided inside the shot collecting cylinder. The axis of the main shaft is on the same straight line as the axis of the shot collecting cylinder. A gap exposing the spiral blade is provided between the bottom end of the outer cylinder and the bottom of the shot collecting cylinder.

[0014] Preferably, a taper gradually decreasing upward is provided at the connection between the shot material chamber and the outer cylinder. The spiral blade extends above the top end of the shot material chamber.

[0015] Preferably, a discharge tube is coaxially arranged in the pellet chamber. The discharge tube is coaxially connected to the main shaft, the bottom of the discharge tube fits against the bottom of the pellet chamber, and a discharge nozzle is arranged on one side of the discharge tube.

[0016] The beneficial effects of the present invention compared with the prior art are as follows:

[0017] Firstly, the present invention continuously conveys the pellets from the pellet receiving cylinder to the loading cylinder through the spiral blade, and then conveys them to the shot blasting machine through the discharge pipe, realizing continuous feeding to the shot blasting machine and avoiding the problem of uneven shot blasting caused by discontinuous feeding.

[0018] Secondly, under the action of the driving unit, the material passing column in the present invention rotates around its own axis and reciprocates along the axis direction, which can control the pellets in the discharge pipe more precisely, and can also effectively prevent the pellets from blocking at the discharge pipe, ensure the smooth discharge of the pellets, enable the pellets to enter the shot blasting machine evenly, and further make the pellets thrown by the shot blasting machine more uniform, improving the uniformity of shot blasting.

[0019] Thirdly, the pellets in the rotating discharge tube in the present invention are discharged through the discharge nozzle, so that the pellets can be more evenly spread at each discharge pipe. The discharge pipe is composed of a first pipe body and a second pipe body with different diameters and a conical section. The first pipe body with a larger diameter can accommodate more pellets than the second pipe body, ensuring that the pellets in the pellet chamber can fill the second pipe body of the discharge pipe and guaranteeing the continuous and uniform conveyance of pellets by each discharge pipe. Description of the Drawings

[0020] Figure 1 is a three-dimensional view of an automatic conveying centrifugal shot blasting device Figure 1 ;

[0021] Figure 2 is a three-dimensional view of an automatic conveying centrifugal shot blasting device Figure 2 ;

[0022] Figure 3 is a side view of an automatic conveying centrifugal shot blasting device;

[0023] Figure 4 is a front view of the pellet conveying unit of an automatic conveying centrifugal shot blasting device;

[0024] Figure 5 is Figure 4 the sectional view taken along the A-A line of

[0025] Figure 6 is Figure 5 the partial enlarged view at B of

[0026] Figure 7 is Figure 5 the three-dimensional sectional view of

[0027] Figure 8 is Figure 7 Partial enlarged view at position C of

[0028] Figure 9 is Figure 7 Partial enlarged view at position D of

[0029] Figure 10 is an exploded perspective view of the shot material conveying unit of an automatic conveying centrifugal shot blasting device;

[0030] Figure 11 is Figure 10 Partial enlarged view at position E of

[0031] The reference numerals in the figure are: 1, housing; 11, drum; 12, drum support; 13, shot blasting machine; 14, receiving trough; 2, shot receiving cylinder; 21, main shaft; 211, spiral blade; 22, outer cylinder; 23, loading cylinder; 231, shot material chamber; 232, discharge pipe; 233, spline sleeve; 234, first bevel gear; 235, fixing seat; 236, guide sleeve; 237, spring; 238, first pipe body; 239, second pipe body; 24, material passing column; 241, spline groove; 242, limit ring; 243, spiral convex block; 25, drive unit; 251, central gear ring; 252, driven gear ring; 253, first synchronous gear; 254, second synchronous gear; 255, synchronous belt; 256, rotary drive; 257, second bevel gear; 258, cam; 26, lifting disc; 261, guide rod; 27, discharge cylinder; 271, discharge nozzle. Detailed implementation manners

[0032] For a better understanding of the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0033] Refer to Figures 1 to 11 :

[0034] An automatic conveying centrifugal shot blasting device, comprising a housing 1, and horizontal drums 11 arranged at both ends of the housing 1. The drums 11 are installed on drum brackets 12. A plurality of shot blasting machines 13 are arranged on the housing 1. The output end of the shot blasting machine 13 communicates with the inside of the housing 1. An inclined material collecting trough 14 is arranged at the bottom of the housing 1. The output end of the material collecting trough 14 is connected to a shot material conveying unit. The shot material conveying unit includes a shot receiving cylinder 2 located at the output end of the material collecting trough 14, and a main shaft 21 vertically rotatably installed in the shot receiving cylinder 2. A spiral blade 211 is arranged on the circumferential side of the main shaft 21. An outer cylinder 22 is coaxially arranged outside the main shaft 21. The spiral blade 211 fits against the inner wall of the outer cylinder 22. A loading cylinder 23 is arranged at the top of the outer cylinder 22. The spiral blade 211 conveys the shot material in the shot receiving cylinder 2 to the loading cylinder 23; A bowl-shaped shot material cavity 231 is arranged in the loading cylinder 23. The bottom of the loading cylinder 23 is provided with the same number of discharge pipes 232 as the number of shot blasting machines 13. The discharge pipes 232 are respectively communicated with the input ends of the shot blasting machines 13 through pipes; A material passing column 24 with the same number as the discharge pipes 232 is rotatably installed on the loading cylinder 23. The material passing column 24 is coaxially arranged in the discharge pipe 232. A driving unit 25 is arranged at the top of the loading cylinder 23. The driving unit 25 drives the main shaft 21 and the material passing column 24 to rotate synchronously around their own axes, and at the same time the material passing column 24 reciprocates along the axial direction.

[0035] When this application is in use, the workpiece to be processed on a commission basis is placed in the drum 11. The rotation of the drum 11 drives the rotation of the workpiece. The shot blaster 13 on the housing 1 sends steel shots into the drum 11 to perform shot blasting on the workpiece. The high-speed rotation of the drum 11 drives the workpiece to be cleaned to roll over and collide violently with the steel shots. The steel shots fall into the bottom material collection tank 14 under the action of gravity and enter the shot collection cylinder 2 along the inclined material collection tank 14 to accumulate. A main shaft 21 is vertically rotatably installed in the shot collection cylinder 2. The spiral blades 211 arranged on the circumferential side of the main shaft 21 rotate under the drive of the main shaft 21. The spiral blades 211 are attached to the inner wall of the outer cylinder body 22 and convey the shot material in the shot collection cylinder 2 upward along the inner wall of the outer cylinder body 22 by rotation, and finally send it into the loading cylinder 23 at the top. A bowl-shaped shot material cavity 231 is arranged in the loading cylinder 23, and the shot material is temporarily stored in the shot material cavity 231. A discharge pipe 232 with the same number as the shot blaster 13 is arranged at the bottom of the loading cylinder 23. The discharge pipe 232 conveys the shot material in the loading cylinder 23 to the input ends of the respective shot blasters 13. A material passing column 24 with the same number as the discharge pipe 232 is rotatably installed on the loading cylinder 23. The material passing column 24 is coaxially arranged in the discharge pipe 232. The drive unit 25 drives the main shaft 21 and the material passing column 24 to rotate synchronously around their own axes, which can control the amount of shot material in the discharge pipe 232, so that it is evenly conveyed into the shot blaster 13, ensuring a stable and uniform supply of shot material to the shot blaster 13. At the same time, the material passing column 24 reciprocates along the axial direction. It can effectively prevent the shot material from being blocked at the discharge pipe 232 and ensure the smooth discharge of the shots. After the shot material enters the shot blaster 13, under the action of the shot blaster 13, the workpiece is polished again. In this embodiment, the spiral blades 211 continuously convey the shot material from the shot collection cylinder 2 to the loading cylinder 23, and then to the shot blaster 13 through the discharge pipe 232, realizing continuous feeding to the shot blaster 13 and avoiding the problem of uneven shot blasting caused by discontinuous feeding. Under the action of the drive unit 25, the material passing column 24 not only rotates around its own axis but also reciprocates along the axial direction, which can control the shot material in the discharge pipe 232 more precisely, and can also effectively prevent the shot material from being blocked at the discharge pipe 232, ensure the smooth discharge of the shots, enable the shot material to enter the shot blaster 13 evenly, and further make the shot material thrown by the shot blaster 13 more uniform, improving the uniformity of shot blasting.

[0036] In order to solve the problem of how to realize the synchronous rotation of the main shaft 21 and the material passing column 24, the following features are specifically set:

[0037] The discharge pipes 232 are evenly distributed around the axis of the main shaft 21 at the lowest end of the shot material chamber 231. The main shaft 21 and the material passing column 24 are rotatably installed at the top of the loading cylinder 23. The driving unit 25 includes a central gear ring 251 and a driven gear ring 252 rotatably installed at the top end of the loading cylinder 23. The central gear ring 251 is coaxially connected to the main shaft 21. The number of the driven gear rings 252 is the same as that of the material passing columns 24. The driven gear rings 252 are coaxially connected to the material passing columns 24 and mesh with the central gear ring 251. A first synchronous gear 253 is coaxially arranged on the central gear ring 251. The driving unit 25 further includes a second synchronous gear 254 rotatably installed at the top of the loading cylinder 23 and located on one side of the central gear ring 251, a synchronous belt 255 drivingly connecting the first synchronous gear 253 and the second synchronous gear 254, and a rotary drive 256 fixedly installed on the housing 1. The working end of the rotary drive 256 is drivingly connected to the second synchronous gear 254.

[0038] In this embodiment, the rotary drive 256 fixedly installed on the housing 1 starts to work. The rotary drive 256 can be a servo motor, and its working end drives the second synchronous gear 254 to operate. Since the synchronous belt 255 drivingly connects the first synchronous gear 253 and the second synchronous gear 254, the operation of the synchronous belt 255 causes the first synchronous gear 253 and the second synchronous gear 254 to rotate. The rotation of the first synchronous gear 253 drives the central gear ring 251 to rotate. Also, because the central gear ring 251 is coaxially connected to the main shaft 21, the rotation of the central gear ring 251 drives the main shaft 21 to rotate around its own axis. Since the driven gear ring 252 meshes with the central gear ring 251, when the central gear ring 251 rotates, the driven gear ring 252 is driven to rotate through the meshing relationship, and further the material passing column 24 rotates around its own axis, realizing the synchronous rotation of the main shaft 21 and the material passing column 24. By arranging components such as the central gear ring 251, the driven gear ring 252, the first synchronous gear 253, the second synchronous gear 254, the synchronous belt 255 and the rotary drive 256 in this embodiment, the movement of the shot material from the shot collecting cylinder 2 to the shot blasting machine 13 is carried out stably.

[0039] In order to achieve the purpose that the material passing column 24 can rotate with the driven gear ring 252 while moving up and down reciprocally, the following features are specifically set:

[0040] A spline groove 241 is arranged on the peripheral side of the top of the material passing column 24 (as Figure 11 shown). The material passing column 24 is spline-connected to a spline sleeve 233 rotatably installed at the top of the loading cylinder 23 through the spline groove 241. The spline sleeve 233 is coaxially arranged with the driven gear ring 252, and the driven gear ring 252 is sleeved outside the spline sleeve 233.

[0041] The driven gear ring 252 rotates under the meshing action with the central gear ring 251. Since the spline sleeve 233 is coaxially arranged with the driven gear ring 252 and the driven gear ring 252 is sleeved outside the spline sleeve 233, the rotation of the driven gear ring 252 drives the spline sleeve 233 to rotate. A spline groove 241 is provided on the circumferential side of the top of the material passing column 24, and the material passing column 24 is spline-connected to the spline sleeve 233 through the spline groove 241. Thus, the material passing column 24 rotates around its own axis along with the rotation of the spline sleeve 233, realizing the rotational movement of the material passing column 24 driven by the driven gear ring 252. The material passing column 24 and the spline sleeve 233 are spline-connected, and the material passing column 24 can move up and down reciprocally within the spline sleeve 233, and this kind of movement does not affect the rotational movement of the material passing column 24 driven by the spline sleeve 233, thus realizing the compound movement of the material passing column 24 while moving up and down reciprocally and rotating.

[0042] In order to realize the reciprocating movement of the material passing column 24 along the axial direction while it rotates, the following features are specifically set:

[0043] A limit ring 242 is provided at the top of the material passing column 24, and the limit rings 242 of all the material passing columns 24 are rotatably installed on the lifting disc 26; a first bevel gear 234 is coaxially arranged at the top of the spline sleeve 233, and the driving unit 25 includes a second bevel gear 257 meshed with the first bevel gear 234. The second bevel gear 257 is rotatably installed in the fixed seat 235 at the top of the charging cylinder 23, the axis of the second bevel gear 257 is horizontally arranged, and a cam 258 is coaxially installed on the second bevel gear 257, and the outer wall of the cam 258 is in contact with the bottom of the lifting disc 26.

[0044] In this embodiment, the first bevel gear 234 coaxially arranged at the top of the spline sleeve 233 is meshed with the second bevel gear 257. When the power in the driving unit 25 makes the driven gear ring 252 rotate, the first bevel gear 234 rotates synchronously with the spline sleeve 233. The first bevel gear 234 drives the second bevel gear 257 to rotate through the gear meshing relationship, and then drives the cam 258 to rotate. Since the limit rings 242 of all the material passing columns 24 are rotatably installed on the lifting disc 26 and the outer wall of the cam 258 is in contact with the bottom of the lifting disc 26, the rotation of the cam 258 makes the lifting disc 26 move reciprocally in the vertical direction, and the reciprocating movement of the lifting disc 26 drives the material passing column 24 to move reciprocally along the axial direction, thus realizing the reciprocating movement of the material passing column 24 along the axial direction while it rotates. In this embodiment, by setting components such as the first bevel gear 234, the second bevel gear 257, the cam 258, the lifting disc 26 and the limit ring 242, the reciprocating movement of the material passing column 24 along the axial direction while it rotates is effectively realized, and the number of electrical components is reduced.

[0045] In order to make the lifting disc 26 move stably in the vertical direction and keep in contact with the surface of the cam 258, the following features are specifically set:

[0046] A number of guide rods 261 extending vertically downward are provided at the bottom of the lifting plate 26 (as Figure 6 shown), and the guide rods 261 are inserted into the guide sleeves 236 provided at the top of the charging cylinder 23. A spring 237 is sleeved outside the guide sleeve 236. The spring 237 elastically connects the lifting plate 26 and the charging cylinder 23, and the elastic force of the spring 237 causes the lifting plate 26 to move downward.

[0047] A number of guide rods 261 extending vertically downward provided at the bottom of the lifting plate 26 are inserted into the guide sleeves 236 provided at the top of the charging cylinder 23. When the cam 258 rotates and pushes the lifting plate 26 to move upward, the guide rods 261 slide within the guide sleeves 236, playing a guiding role in the vertical movement of the lifting plate 26, ensuring that the lifting plate 26 moves stably in the vertical direction without deviation or shaking. A spring 237 is sleeved outside the guide sleeve 236, and the spring 237 elastically connects the lifting plate 26 and the charging cylinder 23. When the cam 258 rotates to make the lifting plate 26 move upward, the spring 237 is stretched and stores elastic potential energy. When the cam 258 continues to rotate and the thrust on the lifting plate 26 decreases or disappears, the elastic force of the spring 237 causes the lifting plate 26 to move downward, always keeping the bottom of the lifting plate 26 in contact with the surface of the cam 258, ensuring the stability of the material passing column 24 during the movement process.

[0048] In order to ensure that the pellets in the pellet chamber 231 can fill the discharge pipes 232, thus ensuring that each discharge pipe 232 maintains the same conveying amount during the process of conveying pellets, the following features are specifically set:

[0049] The discharge pipe 232 is composed of a first pipe body 238 and a second pipe body 239. The diameter of the first pipe body 238 located above is larger than that of the second pipe body 239, and the first pipe body 238 and the second pipe body 239 are connected through a tapered section; the diameter of the material passing column 24 is smaller than the inner diameter of the second pipe body 239.

[0050] In this embodiment, the discharge pipe 232 is composed of a first pipe body 238 and a second pipe body 239 with different diameters and a tapered section. The larger-diameter first pipe body 238 can accommodate more pellets compared to the second pipe body 239, ensuring that the pellets in the pellet chamber 231 can fill the second pipe body 239 of the discharge pipe 232, avoiding the problem of unstable conveying amount caused by the inability of the pellets to fill the discharge pipe 232.

[0051] In order to ensure the dredging effect of the material passing column 24 on the pellets accumulated in the first pipe body 238, the following features are specifically set:

[0052] A spiral convex block 243 protruding from the outer wall of the material passing column 24 is provided at the bottom end of the material passing column 24.

[0053] When the shot material accumulates in the first pipe body 238, the spiral protrusions 243 at the bottom end of the material-passing column 24 rotate as the material-passing column 24 rotates. The spiral protrusions 243 protrude from the outer wall of the material-passing column 24. During the rotation, the spiral protrusions 243 can contact the accumulated shot material and apply a thrust to the shot material through their own spiral structure. This thrust enables the accumulated shot material to move along the spiral trajectory of the spiral protrusions 243, thereby realizing the dredging of the accumulated shot material and ensuring that the shot material can smoothly enter the second pipe body 239 from the first pipe body 238 and finally enter the shot blasting machine 13 for shot blasting operation.

[0054] In order to ensure that the spiral blade 211 can convey the shot material in the shot collecting cylinder 2 upward into the loading cylinder 23, the following features are specifically set:

[0055] The shot collecting cylinder 2 is provided with a taper that gradually narrows downward. The axis of the main shaft 21 is on the same straight line as the axis of the shot collecting cylinder 2. A gap exposing the spiral blade 211 is provided between the bottom end of the outer cylinder body 22 and the bottom of the shot collecting cylinder 2.

[0056] In this embodiment, the shot collecting cylinder 2 has a taper that gradually narrows downward. When the shot material falls under the action of gravity and enters the shot collecting cylinder 2, it will gradually concentrate towards the center of the bottom of the shot collecting cylinder 2, enabling the shot material to be more effectively grabbed and conveyed by the spiral blade 211. The axis of the main shaft 21 is on the same straight line as the axis of the shot collecting cylinder 2, ensuring that the spiral blade 211 can evenly grab and convey the shot material in the shot collecting cylinder 2 during rotation. A gap exposing the spiral blade 211 is provided between the bottom end of the outer cylinder body 22 and the bottom of the shot collecting cylinder 2. During the rotation of the spiral blade 211, the shot material concentrated at the bottom of the shot collecting cylinder 2 is pushed upward through this gap. As the spiral blade 211 rotates, the shot material moves upward along the inner wall of the outer cylinder body 22 and is finally conveyed into the upper loading cylinder 23.

[0057] In order to ensure that the shot material entering the loading cylinder 23 can be evenly distributed above each discharge pipe 232, the following features are specifically set:

[0058] A taper that gradually narrows upward is provided at the connection between the shot material cavity 231 and the outer cylinder body 22, and the spiral blade 211 extends above the top end of the shot material cavity 231.

[0059] A discharge cylinder 27 is coaxially arranged in the shot material cavity 231. The discharge cylinder 27 is coaxially connected to the main shaft 21. The bottom of the discharge cylinder 27 fits the bottom of the shot material cavity 231, and a discharge nozzle 271 is provided on one side of the discharge cylinder 27.

[0060] In this embodiment, after the spherical materials are conveyed upward by the spiral blade 211 to the top of the outer cylinder body 22, since the spiral blade 211 extends above the top end of the spherical material cavity 231, the spherical materials will be pushed into the spherical material cavity 231. The upwardly gradually narrowing taper at the connection between the spherical material cavity 231 and the outer cylinder body 22 causes the spherical materials to be guided by the conical surface when entering the spherical material cavity 231. Under the action of the conical surface, the spherical materials will be more evenly distributed in the discharge cylinder 27 and discharged from the discharge nozzle 271 of the discharge cylinder 27 under the guidance of the conical surface. The discharge cylinder 27 is coaxially connected to and rotates with the main shaft 21. The spherical materials in the rotating discharge cylinder 27 are discharged through the discharge nozzle 271, so that the spherical materials can be more evenly spread at each discharge pipe 232, ensuring that the same amount of spherical materials is discharged at each discharge pipe 232 and ensuring the uniform conveyance of the spherical materials from the spherical material cavity 231 to the discharge pipes 232.

[0061] Working principle: The workpiece to be processed on a commission basis is placed in the drum 11. The rotation of the drum 11 drives the workpiece to rotate. The shot blaster 13 on the housing 1 sends steel shots into the drum 11 to perform shot blasting on the workpiece. The high-speed rotation of the drum 11 drives the workpiece to be cleaned to tumble and collide violently with the steel shots. The steel shots fall into the bottom receiving trough 14 under the action of gravity and enter the shot receiving cylinder 2 along the inclined receiving trough 14 and accumulate. The spiral blade 211 arranged on the periphery of the main shaft 21 in the shot receiving cylinder 2 rotates driven by the main shaft 21. The spiral blade 211 fits against the inner wall of the outer cylinder body 22 and conveys the spherical materials in the shot receiving cylinder 2 upward along the inner wall of the outer cylinder body 22, and finally sends them into the loading cylinder 23 at the top. The loading cylinder 23 is provided with discharge pipes 232 having the same number as the shot blasters 13 at the bottom. The driving unit 25 drives the main shaft 21 and the material passing column 24 to rotate synchronously around their own axes, and at the same time, the material passing column 24 reciprocates along the axial direction, which can control the amount of spherical materials in the discharge pipes 232 and uniformly convey them into the shot blasters 13. After the spherical materials enter the shot blasters 13, under the action of the shot blasters 13, the workpiece is polished again.

[0062] The above embodiments only represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. An automatic conveying centrifugal shot blasting device, comprising a housing, and horizontal drums arranged at both ends of the housing, the drums are installed on drum brackets, several shot blasting machines are arranged on the housing, the output ends of the shot blasting machines communicate with the inside of the housing, an inclined material receiving groove is arranged at the bottom of the housing, and the output end of the material receiving groove is connected to a shot material conveying unit, characterized in that, The pellet conveying unit includes a pellet receiving cylinder located at the output end of the material receiving trough, and a main shaft vertically rotatably installed in the pellet receiving cylinder. A spiral blade is arranged on the circumferential side of the main shaft, and an outer cylinder is coaxially arranged outside the main shaft. The spiral blade fits the inner wall of the outer cylinder. A loading cylinder is arranged at the top of the outer cylinder, and the spiral blade conveys the pellets in the pellet receiving cylinder to the loading cylinder. A bowl-shaped pellet cavity is arranged in the loading cylinder, and the bottom of the loading cylinder is provided with the same number of discharge pipes as the number of shot blasting machines. The discharge pipes are respectively connected to the input ends of the shot blasting machines through pipelines. A feeding column with the same number as the discharge pipes is rotatably installed on the loading cylinder. The feeding column is coaxially arranged in the discharge pipe. A driving unit is arranged at the top of the loading cylinder. The driving unit drives the main shaft and the feeding column to rotate synchronously around their own axes, and at the same time, the feeding column reciprocates along the axial direction.

2. The automatic conveying centrifugal shot blasting device according to claim 1, wherein, The discharge pipes are evenly distributed around the axis of the main shaft at the lowest end of the pellet cavity. The main shaft and the feeding column are rotatably installed at the top of the loading cylinder. The driving unit includes a central gear ring and a driven gear ring rotatably installed at the top end of the loading cylinder. The central gear ring is coaxially connected to the main shaft. The number of driven gear rings is the same as the number of feeding columns. The driven gear rings are coaxially connected to the feeding columns and mesh with the central gear ring. A first synchronous gear is coaxially arranged on the central gear ring. The driving unit further includes a second synchronous gear rotatably installed at the top of the loading cylinder and located on one side of the central gear ring, a synchronous belt drivingly connecting the first synchronous gear and the second synchronous gear, and a rotary driver fixedly installed on the housing. The working end of the rotary driver is drivingly connected to the second synchronous gear.

3. An automatic conveying centrifugal shot blasting device according to claim 2, wherein, Spline grooves are arranged on the circumferential side of the top of the feeding column. The feeding column is spline-connected to a spline sleeve rotatably installed at the top of the loading cylinder through the spline grooves. The spline sleeve is coaxially arranged with the driven gear ring, and the driven gear ring is sleeved outside the spline sleeve.

4. The automatic conveying centrifugal shot blasting device according to claim 3, characterized in that, A limiting ring is arranged at the top of the feeding column. The limiting rings of all the feeding columns are rotatably installed on a lifting disc. A first bevel gear is coaxially arranged at the top of the spline sleeve. The driving unit includes a second bevel gear meshingly connected to the first bevel gear. The second bevel gear is rotatably installed in a fixed seat at the top of the loading cylinder. The axis of the second bevel gear is horizontally arranged, and a cam is coaxially installed on the second bevel gear. The outer wall of the cam fits the bottom of the lifting disc.

5. An automatic conveying centrifugal shot blasting device according to claim 4, wherein, A plurality of guide rods extending vertically downward are arranged at the bottom of the lifting disc. The guide rods are inserted into guide sleeves arranged at the top of the loading cylinder. A spring is sleeved outside the guide sleeve. The spring elastically connects the lifting disc and the loading cylinder, and the elastic force of the spring makes the lifting disc move downward.

6. An automatic conveying centrifugal shot blasting device according to claim 4, characterized in that, The discharge pipe is composed of a first pipe body and a second pipe body. The diameter of the first pipe body located above is larger than that of the second pipe body. The first pipe body and the second pipe body are connected through a tapered section. The diameter of the feeding column is smaller than the inner diameter of the second pipe body.

7. An automatic conveying centrifugal shot blasting device according to claim 4, characterized in that, A spiral convex block protruding from the outer wall of the feeding column is arranged at the bottom end of the feeding column.

8. An automatic conveying centrifugal shot blasting device according to claim 4, characterized in that, A taper gradually decreasing downward is arranged in the pellet receiving cylinder. The axis of the main shaft is on the same straight line as the axis of the pellet receiving cylinder. A gap exposing the spiral blade is arranged between the bottom end of the outer cylinder and the bottom of the pellet receiving cylinder.

9. An automatic conveying centrifugal shot blasting device according to claim 4, characterized in that, A taper gradually decreasing upward is arranged at the connection between the pellet cavity and the outer cylinder. The spiral blade extends above the top end of the pellet cavity.

10. An automatic conveying centrifugal shot blasting device according to claim 9, characterized in that, A discharge tube is coaxially arranged in the pellet cavity. The discharge tube is coaxially connected to the main shaft. The bottom of the discharge tube is attached to the bottom of the pellet cavity, and a discharge nozzle is arranged on one side of the discharge tube.

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