Shot blasting equipment for valve cover machining

Abstract

The invention relates to the technical field of metal polishing, in particular to shot blasting equipment for valve cover machining, which comprises a shot blasting machine shell, and a shot circulating system, two shot blasting machines, a hoisting system and a dust removal system which are mounted at the shot blasting machine shell, the storage hopper is used for connecting the shot circulating system and the two shot blasting machines; wherein a transverse groove is formed in the middle of the top end of the shot blasting machine shell, guide plates are symmetrically and fixedly connected to the two sides of the top of the transverse groove, two matched driving mechanisms are arranged outside the two guide plates respectively, and the two driving mechanisms are used for positioning a hoisting system entering along the transverse groove and providing rotating power; the adjusting mechanism is connected with the driving mechanism and the two shot blasting machines; the shot blasting machine is driven by the sector gear, the rectangular toothed plate and the hinge rod to realize synchronous reciprocating rotation of 0-10 degrees, and multi-mode movement of a hoisting system is combined, so that shots impact the surface of a workpiece at a dynamic cross angle of 30-35 degrees to cover a complex curved surface of a valve cover, and blind areas are reduced.

Description

Technical Field

[0001] This invention relates to the field of metal polishing technology, specifically to a shot blasting equipment for processing valve covers. Background Technology

[0002] As a critical sealing component in piping systems, the surface quality of valve covers directly affects their sealing performance and service life. During the casting or forging process, valve cover surfaces often retain defects such as oxide scale, rust layers, and welding slag. These defects need to be addressed by impacting the workpiece surface with high-speed shot in a shot blasting machine. This process can achieve three major goals in one step: oxide scale removal, surface strengthening, and roughness control. Therefore, shot blasting is an indispensable process in valve cover manufacturing.

[0003] Existing shot blasting machines generally adopt a fixed structure design, and their core problems are reflected in the following aspects: 1. Fixed shot blasting angle, resulting in many blind spots: Traditional shot blasting machines typically install shot blasters at a fixed angle (e.g., symmetrically distributed in a diamond pattern) on the side wall of the shot blasting chamber, limiting the coverage area of ​​the shot trajectory. For complex curved surfaces of valve covers (such as flange sealing surfaces and internal grooves), some areas cannot be effectively covered due to deviations in the shot blasting angle. This necessitates multiple manual adjustments to the workpiece position and shot blasting parameters, or extending the shot blasting machine's operating time, leading to a reduction in processing efficiency of over 30%. 2. Limited displacement method, restricting the processing of complex workpieces: Workpieces are usually fixed by pallets or clamps and can only rotate around a single axis in the shot blasting chamber, making it difficult to adjust to the optimal shot incident angle (such as 45°-75°), which affects the consistency of cleaning quality; 3. Abrasive loss and energy consumption: Under fixed shot blasting angle and shot flow rate, the kinetic energy distribution is uneven when the shot comes into contact with the workpiece surface. Some shot bounces ineffectively due to non-perpendicular impact, resulting in an abrasive loss rate as high as 15%-20%. In order to cover the blind area, the shot blasting time needs to be extended or the power of the shot blaster needs to be increased, which leads to an increase in unit energy consumption of 20%-30%.

[0004] Therefore, a shot blasting equipment for valve cover processing is proposed to improve the grinding efficiency of valve covers while reducing the loss of abrasive and energy. Summary of the Invention

[0005] The purpose of this invention is to provide a shot blasting device for processing valve covers, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a shot blasting equipment for processing valve covers, comprising: The housing of the shot blasting machine, the shot circulation system installed on the housing of the shot blasting machine, two shot blasting machines, a hoisting system, and a dust removal system; The storage hopper is used to connect the shot circulation system and two shot blasting machines; The top center of the shot blasting machine housing has a transverse groove, and guide plates are symmetrically fixed on both sides of the top of the transverse groove. Two cooperating drive mechanisms are set outside the two guide plates to position the hoisting system that enters along the transverse groove and provide rotational power. It also includes an adjustment mechanism, which is connected to the drive mechanism and the two shot blasting machines. The drive mechanism provides angle adjustment power to the shot blasting machines, enabling coordinated grinding of the workpieces inside the shot blasting machine housing.

[0007] As a further improvement to the above solution, the hoisting system includes multiple interconnected top supports installed on the top of the shot blasting machine housing, the tops of the multiple top supports being mounted on a crossbeam directly above the transverse groove, and the crossbeam being parallel to the transverse groove. A sliding device is horizontally connected inside the crossbeam. An electric hoist is installed at the bottom of the sliding device. The electric hoist is connected to a first connecting plate via a rope. The bottom of the first connecting plate is rotatably connected to a rotating rod. A movable sprocket is coaxially fixedly connected to the outer wall of the rotating rod. The movable sprocket slides along the top of the guide plate, and a hook is coaxially fixed to the bottom of the movable sprocket. A connecting frame is hung at the bottom of the hook, and the workpiece is supported by a protrusion on the connecting frame.

[0008] As a further improvement to the above solution, the drive mechanism includes a side shell fixed to the top of the shot blasting machine housing. A horizontal slot is provided on the inner side of the side shell at the same level as the top surface of the guide plate. A second connecting plate is fixedly installed on one side of the side shell. A driven sprocket is coaxially fixedly connected to the upper and lower ends of the second connecting plate. The driven sprocket is connected to a driving sprocket installed on the other side of the side shell through a chain. The bottom end of the driving sprocket is coaxially fixedly connected to a reduction motor.

[0009] As a further improvement to the above scheme, the adjustment mechanism includes a sector gear that is coaxially and fixedly connected to a drive sprocket. A rectangular toothed plate is intermittently meshed on both sides of the sector gear. An outer horizontal rod is fixedly connected to the outside of the rectangular toothed plate. The outer horizontal rod is connected to one of the shot blasting machines through a hinged rod, and the two shot blasting machines are hinged to each other through another hinged rod.

[0010] As a further improvement to the above scheme, two shot blasting machines are installed alternately on the shot blasting machine housing. Each shot blasting machine is installed on the shot blasting machine housing through a guide frame. The top of the guide frame is rotatably connected to the mounting sleeve plate that is movable inside the guide frame through a rotating block, and the bottom end of the mounting sleeve plate is slidably connected to the arc groove opened at the bottom end of the inner wall of the guide frame through a slider. The mounting plate is fixedly connected to a shot blasting machine cover. A feed inlet is fixedly connected to one side of the shot blasting machine cover and is connected to one of the holes in the storage hopper. Inside the shot blasting machine, a cover is connected to the feed inlet. A discharge slot is opened on one side of the cover. A cover is coaxially rotatably connected to the outside of the cover. Several connecting slots are circumferentially opened in the middle of the cover. Blades are evenly fixedly connected to both sides of each connecting slot. Next to each blade is a shot distribution wheel parallel to the center line of the cover. A shot blasting motor is coaxially fixedly connected to the other side of the cover by bolts.

[0011] As a further improvement to the above solution, the shot circulation system includes a conveying channel installed on the back of the shot blasting machine housing. A rotating shaft is rotatably connected to the bottom of the shot blasting machine housing. Screw blades are fixedly connected to the rotating shaft on the inner and outer walls of the shot blasting machine housing. A lower shot separator is fixedly connected to the rotating shaft on the outer wall of the conveying channel. A motor platform is fixedly connected to the top of the conveying channel. A bucket elevator is fixedly connected to one side of the motor platform. A second drive sprocket is fixedly connected to the output end of the bucket elevator. A second driven sprocket is connected to a second driven sprocket via a second chain. The second driven sprocket is rotatably connected to the conveying channel via a connecting shaft. An upper shot separator is fixedly connected to the connecting shaft inside the conveying channel. One side of the top of the conveying channel is connected to a storage hopper.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a sector gear, a rectangular toothed plate, and a hinged rod to drive the shot blasting machine to achieve synchronous reciprocating rotation of 0°-10°. Combined with the multi-mode motion of the hoisting system, the shot impacts the workpiece surface at a dynamic cross angle of 30°-35°, covering the complex curved surface of the valve cover and reducing blind spots.

[0013] 2. This invention integrates auger blades, a shot separator, and a storage hopper into a shot circulation system, achieving efficient recovery and classification of abrasives; and optimizes the shot incident angle with an adjustment mechanism to reduce ineffective rebound, thereby reducing abrasive loss rate and unit energy consumption.

[0014] 3. The hoisting system of this invention enables the workpiece to move horizontally, vertically, and in rotation with multiple degrees of freedom within the shot blasting chamber through a sliding device, electric hoist, and movable sprocket, avoiding cleaning dead angles caused by single rotation and adapting to valve covers of different sizes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 For the present invention Figure 1 A schematic diagram of the back structure.

[0017] Figure 3 For the present invention Figure 1 Top view.

[0018] Figure 4 For the present invention Figure 3 Cross-sectional view along the AA direction.

[0019] Figure 5 For the present invention Figure 3 Cross-sectional view in the BB direction.

[0020] Figure 6 This is a schematic diagram of the shot blasting chamber of the present invention.

[0021] Figure 7 This is a diagram showing the connection state between the adjustment mechanism of the present invention and the shot blasting machine.

[0022] Figure 8 This is a partial exploded view of the adjusting mechanism of the present invention.

[0023] Figure 9 This is a diagram showing the installation state of the shot blasting machine according to the present invention.

[0024] Figure 10 This is a schematic diagram of the shot blasting machine of the present invention in its installation state.

[0025] Figure 11 This is a partial cross-sectional schematic diagram of the shot blasting machine of the present invention.

[0026] Figure 12 For the present invention Figure 10 A magnified schematic diagram of the structure at point a.

[0027] Figure 13 For the present invention Figure 10 A magnified schematic diagram of the structure at point b.

[0028] In the diagram: 1. Shot blasting machine housing; 100. Top support; 101. Crossbeam; 102. Horizontal groove; 103. Protective door; 104. Guide plate; 110. Sliding device; 111. Electric hoist; 112. First connecting plate; 113. Rotating rod; 114. Movable sprocket; 115. Hook; 116. Side housing; 117. Horizontal slot; 118. Base; 119. Second connecting plate; 1110. Driven sprocket one; 1111. Chain one; 1112. Drive sprocket one; 1113. Gear motor; 1114. Sector gear; 1115. Rectangular toothed plate; 1116. Outer horizontal bar; 1117. Hinge rod; 2. Shot circulation system; 201. Conveying channel; 202. Rotating shaft; 203. Screwdriver blades; 204. Lower shot separator; 205. Upper shot separator; 206. Connecting shaft; 207. Driven sprocket two; 208. Motor platform; 209. Bucket elevator; 2010. Drive sprocket two; 2011. Chain two; 210. Storage hopper; 3. Shot blasting machine cover; 300. Shot blasting motor; 301. Cover; 302. Blades; 303. Shot distribution wheel; 304. Orientation clamp; 305. Feed inlet; 306. Connecting slot; 310. Guide frame; 311. Mounting sleeve; 312. Rotating block; 313. Arc groove; 314. Sliding block; 315. Discharge slot. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] See Figures 1-13 This invention provides a shot blasting equipment for processing valve covers, comprising: The shot blasting machine housing 1, and the shot circulation system 2 installed on the shot blasting machine housing 1, two shot blasting machines, a hoisting system, and a dust removal system; Furthermore, dust removal systems typically employ a combination of "bag filter + centrifugal fan + screw conveyor," including but not limited to the aforementioned dust removal methods, which will not be elaborated upon here.

[0031] Storage hopper 210 is used to connect the shot circulation system 2 and two shot blasting machines; Furthermore, the storage hopper 210 is used to temporarily store the separated clean abrasive and transport the abrasive to the shot blasting machine through the shot delivery pipeline. The storage hopper 210 is usually a conical or cylindrical shell, lined with wear-resistant material such as high-chromium cast iron, and equipped with a pneumatic shot supply gate valve at the bottom to control the abrasive flow rate.

[0032] Specifically, the storage center and recycling center (integrated into storage hopper 210) of the hanging shot blasting machine (such as Q378 series and Q3740 series) are one of its core functional modules. They are mainly responsible for the storage, circulation and impurity separation of shot, which directly affects the cleaning efficiency, shot utilization rate and operational stability of the equipment. This is existing equipment technology and will not be elaborated here.

[0033] It should also be noted that an electrical control cabinet is connected to the outside of the overall equipment: it must have functions such as emergency stop button, overload protection, and leakage protection to ensure operational safety. Although it is not shown in the drawing, it needs to be used in conjunction with the equipment in actual operation. The electrical control cabinet is existing equipment and will not be described in detail here.

[0034] The top center of the shot blasting machine housing 1 has a transverse groove 102. Guide plates 104 are symmetrically fixedly connected on both sides of the top of the transverse groove 102. Two cooperating drive mechanisms are respectively provided on the outside of the two guide plates 104 to position the hoisting system that enters along the transverse groove 102 and provide rotation power. It also includes an adjustment mechanism, which is connected to the drive mechanism and the two shot blasting machines, and provides angle adjustment power to the shot blasting machines through the drive mechanism to achieve coordinated grinding of the workpieces inside the shot blasting machine housing 1.

[0035] See Figure 1 and Figure 2 The storage hopper 210 and the shot blasting machine are connected by a pipeline, which is not shown here. The hoisting system lifts the connecting frame and moves the multiple valve covers hanging on the connecting frame into the shot blasting machine housing 1 at the same time, waiting for the shot blasting machine to grind them.

[0036] It should be noted that the shot blasting machine housing 1 forms a shot blasting chamber, which is a sealed operating space for shot blasting of workpieces. The structure is a welded frame of steel plate / section steel, lined with high wear-resistant protective plates (such as ZGMn13 high manganese steel, 65Mn alloy steel) to resist the impact of shot and extend the service life of the equipment.

[0037] The hoisting system includes multiple interconnected top supports 100 installed on the top of the shot blasting machine housing 1. The tops of the multiple top supports 100 are mounted on a crossbeam 101 directly above the cross groove 102, and the crossbeam 101 is parallel to the cross groove 102. A sliding device 110 is horizontally slidably connected inside the crossbeam 101. An electric hoist 111 is installed at the bottom of the sliding device 110. The electric hoist 111 is connected to a first connecting plate 112 via a rope. The bottom of the first connecting plate 112 is rotatably connected to a rotating rod 113. A movable sprocket 114 is coaxially fixedly connected to the outer wall of the rotating rod 113. The movable sprocket 114 slides along the top of the guide plate 104. A hook 115 is coaxially fixedly connected to the bottom of the rotating rod 113 at the movable sprocket 114. A connecting frame is hung at the bottom of the hook 115. The workpiece is supported by a protrusion on the connecting frame.

[0038] See Figures 1-3 The top support 100 is composed of vertical steel and connecting support rods, which are connected to each other to improve the connection strength.

[0039] It should be further noted that a control motor is provided at the sliding device 110 to drive the moving wheel that contacts the crossbeam 101 to move inward / outward along the crossbeam 101. This motor must have a deceleration function.

[0040] Another implementation of the rotating rod 113 in this application is as follows: the rotating rod 113 is replaced with a hydraulic rod / electric push rod, and the bottom is connected to the hook 115. The hydraulic rod / electric push rod and the movable sprocket 114 rotate together, which can drive the workpiece suspended at the bottom to make vertical displacement, avoid single rotation along the axis, and increase the contact area with the abrasive of the shot blasting machine.

[0041] See Figure 1 , Figure 2 and Figure 4 The hook 115 is driven by the hoisting system and enters the designated position along the guide plate 104.

[0042] The drive mechanism includes a side housing 116 fixed to the top of the shot blasting machine housing 1. A horizontal slot 117 is provided on the inner side of the side housing 116 at a position flush with the top surface of the guide plate 104. A second connecting plate 119 is fixedly installed on one side of the side housing 116. A driven sprocket 1110 is coaxially fixedly connected to the upper and lower ends of the second connecting plate 119. The driven sprocket 1110 is connected to the driving sprocket 1112 installed on the other side of the side housing 116 via a chain 1111. The bottom end of the driving sprocket 1112 is coaxially fixedly connected to the reduction motor 1113.

[0043] Specifically, there are four cooperative modes between the two drive mechanisms and the movable sprocket 114 entering the guide plate 104, namely: Figure 3 For reference: Mode 1: The two geared motors 1113 drive clockwise, which in turn drives the movable sprocket 114 to rotate counterclockwise; Mode 2: The two geared motors 1113 drive counterclockwise, which in turn drives the movable sprocket 114 to rotate clockwise; Mode 3: The left reduction motor 1113 drives clockwise and the right reduction motor 1113 drives counterclockwise, causing the movable sprocket 114 to slide outward along the crossbeam 101; Mode 4: The left-side geared motor 1113 drives counterclockwise and the right-side geared motor 1113 drives clockwise, causing the movable sprocket 114 to slide inward along the crossbeam 101.

[0044] The adjustment mechanism includes a geared motor 1113 and a drive sprocket 1112, which are coaxially fixedly connected to a sector gear 1114. A rectangular toothed plate 1115 is intermittently meshed on both sides of the sector gear 1114. An outer horizontal rod 1116 is fixedly connected to the outside of the rectangular toothed plate 1115. The outer horizontal rod 1116 is connected to one of the shot blasting machines through a hinge rod 1117. The two shot blasting machines are hinged to each other through another hinge rod 1117.

[0045] For details, please refer to Figure 7 and Figure 8 The rectangular toothed plate 1115 can only slide horizontally back and forth at the connection with the side shell 116. Furthermore, the connection between the bottom two sides of the rectangular toothed plate 1115 and the side shell 116 is a combination of protrusions and grooves.

[0046] Two shot blasting machines are staggered on the shot blasting machine housing 1. Each shot blasting machine is installed on the shot blasting machine housing 1 via a guide frame 310. The top of the guide frame 310 is rotatably connected to the mounting sleeve 311, which is movable inside the guide frame 310, via a rotating block 312. The bottom end of the mounting sleeve 311 is slidably connected to the arc-shaped groove 313 opened on the bottom end of the inner wall of the guide frame 310 via a slider 314. A shot blasting machine cover 3 is fixedly connected to the outside of the mounting sleeve 311. A feed port 305 is fixedly connected to one side of the shot blasting machine cover 3. The feed port 305 is connected to one of the holes in the storage hopper 210.

[0047] See Figures 9-13 The angle between the spray directions of the two shot blasting machines, i.e. the intersection angle of the shot trajectories of the two shot blasting machines, is 30°-35°.

[0048] Inside the shot blasting machine cover 3, a cover is connected to the feed port 305. A discharge slot 315 is opened on one side of the cover. A cover 301 is coaxially rotatably connected to the outside of the cover. Several connecting slots 306 are circumferentially opened in the middle of the cover 301. Blades 302 are evenly fixedly connected to both sides of each connecting slot 306. Next to each blade 302, there is a shot distribution wheel 303 parallel to the center line of the cover. A shot blasting motor 300 is coaxially fixedly connected to the other side of the cover 301 by bolts.

[0049] The bottom rotation angle of mounting plate 311 is 0°-10°.

[0050] See Figure 10 , Figure 12 and Figure 13 A bearing is coaxially installed at the connection between the cover 301 and the inner wall of the shot blasting machine cover 3.

[0051] The shot circulation system 2 includes a conveying channel 201 installed on the back of the shot blasting machine housing 1. A rotating shaft 202 is rotatably connected to the bottom of the shot blasting machine housing 1. Screw blades 203 are fixedly connected to the rotating shaft 202 on the inner and outer walls of the shot blasting machine housing 1. A lower shot separator 204 is fixedly connected to the rotating shaft 202 on the outer wall of the conveying channel 201. A motor platform 208 is fixedly connected to the top of the conveying channel 201. A bucket elevator 209 is fixedly connected to one side of the motor platform 208. A second drive sprocket 2010 is fixedly connected to the output end of the bucket elevator 209. A second driven sprocket 2010 is connected to a second driven sprocket 207 through a second chain 2011. The second driven sprocket 207 is rotatably connected to the conveying channel 201 through a connecting shaft 206. An upper shot separator 205 is fixedly connected to the connecting shaft 206 inside the conveying channel 201. One side of the top of the conveying channel 201 is connected to a storage hopper 210.

[0052] See Figure 1 , Figure 2 , Figure 4 and Figure 5 The conveying channel 201, rotating shaft 202, lower shot separator 204, upper shot separator 205, connecting shaft 206, driven sprocket 207, motor platform 208, bucket elevator 209, driving sprocket 2010, and chain 2011 are integrated into a vertical elevator. The abrasive material that has been shot by the auger blades 203 is collected at the conveying channel 201. The lower shot separator 204 and the upper shot separator 205 collect and classify the abrasive material in the storage hopper 210. Then, the qualified abrasive material is transported back to the shot blasting machine.

[0053] When using this invention, the entire equipment needs to be inspected to ensure it is operating normally. Then, the protective door 103 is opened to expose the shot blasting chamber. Multiple valve covers are placed on the connecting frame, and the connecting frame is connected to the hook 115. Then, the sliding device 110 is activated to drive the entire electric hoist 111 to slide inward. The hook 115 can move along the guide plate 104 to drive the bottom connecting frame into the shot blasting chamber. When the movable sprocket 114 is connected to the chain 1111, it moves in mode four. After the movable sprocket 114 and the connecting frame are completely inside the shot blasting chamber, the protective door 103 is closed to seal the shot blasting chamber. Then, the shot blasting machine and drive mechanism are controlled and started to maintain intermittent switching between mode one and mode two.

[0054] When switching between mode one and mode two, the sector gear 1114 drives the rectangular toothed plate 1115 to drive the outer horizontal rod 1116 to slide horizontally back and forth. Under the hinge of the two hinge rods 1117, the two mounting sleeves 311 and the shot blasting machine cover 3 drive the two mounting sleeves 311 and the shot blasting machine cover 3 to achieve synchronous reciprocating rotation of 0°-10° along the arc groove 313. In conjunction with the shot blasting machine operation, the abrasive is delivered to the blades 302 and the shot distribution wheel 303. Under centrifugal force, the abrasive is thrown along the opening of the mounting sleeve 311, which further improves the coverage of the grinding range of the valve cover, saves energy and reduces abrasive consumption.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shot blasting equipment for processing valve covers, characterized in that, include: The housing of the shot blasting machine, the shot circulation system installed on the housing of the shot blasting machine, two shot blasting machines, a hoisting system, and a dust removal system; The storage hopper is used to connect the shot circulation system and two shot blasting machines; The top center of the shot blasting machine housing has a transverse groove, and guide plates are symmetrically fixed on both sides of the top of the transverse groove. Two cooperating drive mechanisms are set outside the two guide plates to position the hoisting system that enters along the transverse groove and provide rotational power. It also includes an adjustment mechanism, which is connected to the drive mechanism and the two shot blasting machines. The drive mechanism provides angle adjustment power to the shot blasting machines, enabling coordinated grinding of the workpieces inside the shot blasting machine housing.

2. The shot blasting equipment for processing valve covers according to claim 1, characterized in that: The hoisting system includes multiple interconnected top supports installed on the top of the shot blasting machine housing. The tops of the multiple top supports are mounted on a crossbeam directly above the cross groove, and the crossbeam is parallel to the cross groove.

3. The shot blasting equipment for processing valve covers according to claim 2, characterized in that: A sliding device is horizontally slidably connected inside the crossbeam. An electric hoist is installed at the bottom of the sliding device. The electric hoist is connected to a first connecting plate via a rope. The bottom of the first connecting plate is rotatably connected to a rotating rod. A movable sprocket is coaxially fixedly connected to the outer wall of the rotating rod.

4. The shot blasting equipment for processing valve covers according to claim 3, characterized in that: The movable sprocket slides along the top of the guide plate, and a hook is coaxially fixedly connected to the bottom end of the movable sprocket. A connecting frame is hung at the bottom of the hook, and the workpiece is supported by a protrusion on the connecting frame.

5. The shot blasting equipment for processing valve covers according to claim 1, characterized in that: The drive mechanism includes a side shell fixed to the top of the shot blasting machine housing. A horizontal slot is provided on the inner side of the side shell at the same level as the top surface of the guide plate. A second connecting plate is fixedly installed on one side of the side shell. A driven sprocket is coaxially fixedly connected to the upper and lower ends of the second connecting plate. The driven sprocket is connected to a driving sprocket installed on the other side of the side shell through a chain. The bottom end of the driving sprocket is coaxially fixedly connected to a reduction motor.

6. The shot blasting equipment for processing valve covers according to claim 1, characterized in that: The adjustment mechanism includes a sector gear that is coaxially and fixedly connected to a drive sprocket. A rectangular toothed plate is intermittently meshed on both sides of the sector gear. An outer horizontal rod is fixedly connected to the outer side of the rectangular toothed plate. The outer horizontal rod is connected to one of the shot blasting machines through a hinged rod, and the two shot blasting machines are hinged to each other through another hinged rod.

7. The shot blasting equipment for processing valve covers according to claim 6, characterized in that: The two shot blasting machines are staggered on the shot blasting machine housing. Each shot blasting machine is installed on the shot blasting machine housing via a guide frame. The top of the guide frame is rotatably connected to the mounting sleeve plate that moves within the guide frame via a rotating block, and the bottom end of the mounting sleeve plate is slidably connected to the arc-shaped groove opened at the bottom end of the inner wall of the guide frame via a slider.

8. The shot blasting equipment for processing valve covers according to claim 7, characterized in that: The mounting plate is fixedly connected to a shot blasting machine cover. A feed inlet is fixedly connected to one side of the shot blasting machine cover and is connected to one of the holes in the storage hopper.

9. The shot blasting equipment for processing valve covers according to claim 8, characterized in that: The shot blasting machine has a cover connected to the feed inlet inside the cover. A discharge slot is opened on one side of the cover. A cover is coaxially rotatably connected to the outside of the cover. Several connecting slots are opened circumferentially in the middle of the cover. Blades are evenly fixedly connected to both sides of each connecting slot. Next to each blade is a shot distribution wheel parallel to the center line of the cover. A shot blasting motor is coaxially fixedly connected to the other side of the cover by bolts.

10. A shot blasting equipment for processing valve covers according to claim 1, characterized in that: The shot circulation system includes a conveying channel installed on the back of the shot blasting machine housing. The conveying channel is rotatably connected to the bottom of the shot blasting machine housing by a rotating shaft. Screw blades are fixedly connected to the rotating shaft on the inner and outer walls of the shot blasting machine housing. A lower shot separator is fixedly connected to the rotating shaft on the outer wall of the conveying channel. A motor platform is fixedly connected to the top of the conveying channel. A bucket elevator is fixedly connected to one side of the motor platform. A second drive sprocket is fixedly connected to the output end of the bucket elevator. The second drive sprocket is connected to a second driven sprocket via a chain. The second driven sprocket is rotatably connected to the conveying channel via a connecting shaft. An upper shot separator is fixedly connected to the connecting shaft inside the conveying channel. One side of the top of the conveying channel is connected to a storage hopper.

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