Sucker rod coupling anticorrosion rough grinding treatment equipment

Abstract

The application belongs to the technical field of coupling processing, and particularly discloses a rough grinding treatment equipment for corrosion prevention of sucker rod couplings, which comprises a base, a protective shell, a controller and a grinding wheel polishing mechanism arranged on the base, and a feeding mechanism, the feeding mechanism comprises a second driving seat slidingly arranged on the base, an installation cylinder is arranged on the second driving seat through a mounting plate, two operation windows are symmetrically arranged on the cylinder wall of the installation cylinder, a rotating shaft is rotatably arranged in the installation cylinder, a turnover driving assembly is arranged on the second driving seat, and a clamping mechanism is arranged on one side of the rotating shaft. The installation cylinder with two operation windows, the grinding wheel polishing mechanism and the observation plate correspond to the layout of different windows respectively, so that the dangerous polishing operation and personnel inspection and measurement are isolated in space, the risk of personnel contacting the rotating grinding wheel is fundamentally eliminated, the grinding wheel mechanism does not need to be repeatedly started and stopped or moved, and the overall operation rhythm is optimized.

Description

Technical Field

[0001] This invention belongs to the field of coupling processing, and specifically discloses a coarse grinding equipment for corrosion protection of sucker rod couplings. Background Technology

[0002] As a core connecting component of the oil pumping system, the surface condition of the sucker rod coupling directly affects the anti-corrosion treatment effect and the overall service life. Rough grinding is a key preliminary process before anti-corrosion treatment of the coupling. It is necessary to remove surface impurities and flatten the base surface by grinding to provide suitable conditions for subsequent anti-corrosion treatment.

[0003] Existing rough grinding equipment generally uses a grinding wheel to grind the outer wall of the coupling. This method can quickly meet the rough grinding requirements, effectively remove excess impurities from the coupling surface, and has the advantages of simple structure and high processing efficiency. However, because the rough grinding process has basic requirements for surface accuracy and requires close-range inspection of the grinding process, users need to stop the machine from time to time, move the grinding wheel assembly to a distance, and use calipers to measure the outer surface of the coupling and observe the grinding effect. In actual operation, in order to reduce efficiency loss, users usually do not stop the grinding wheel from rotating, but only move the grinding wheel away before taking measurements, which poses obvious safety risks to users and cannot meet the requirements of efficient and safe rough grinding of couplings. It needs to be improved through structural optimization. Summary of the Invention

[0004] In view of this, the purpose of this invention is to propose a coarse grinding treatment device for corrosion protection of sucker rod couplings, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides a coarse grinding treatment device for corrosion protection of sucker rod couplings, including a base, a protective shell, a controller, and a grinding wheel mechanism disposed on the base, and a feeding mechanism. The feeding mechanism includes a second drive seat slidably mounted on the base, and a mounting cylinder is disposed on the second drive seat via a mounting plate. Two operation windows are symmetrically opened on the wall of the mounting cylinder. A rotating shaft is rotatably mounted inside the mounting cylinder. A flipping drive assembly is disposed on the second drive seat, and a clamping mechanism is disposed on one side of the rotating shaft. A drive stop assembly is also disposed on the second drive seat.

[0006] In the above technical solution, preferably, the grinding wheel mechanism is movably mounted on the base via a third drive seat, and is correspondingly set for one of the operation windows, while an observation plate is mounted above the other operation window.

[0007] In the above technical solution, preferably, the flipping drive assembly includes a first motor disposed on the second drive seat, and the output end of the first motor is connected to the rotating shaft for transmission.

[0008] In the above technical solution, preferably, the clamping mechanism includes a positioning cylinder mounted on the outside of the rotating shaft via a mounting bearing, and at least one pair of movable push rods slidably inserted inside the positioning cylinder. A hand crank is rotatably mounted on the positioning cylinder via a rotating rod. An active bevel gear is provided on the rotating rod. At least one pair of driven bevel gears are provided on the inner wall of the positioning cylinder and mesh with the active bevel gears for transmission. Each driven bevel gear is provided with a screw, and the movable push rod is threadedly engaged with the corresponding screw.

[0009] In the above technical solution, preferably, the drive stop assembly includes a second motor that is slidably mounted on the mounting plate via a first drive seat. The output end of the second motor is provided with an assembly head. A fixing block is provided on one side of the positioning cylinder. A mating groove is provided on the fixing block, and the mating groove is adapted to the assembly head.

[0010] In the above technical solution, preferably, the drive stop assembly further includes a stop unit, the stop unit includes a friction ring connected to a fixed block, a rotary cylinder is provided on the rotating shaft via an assembly plate, the assembly plate is coaxially fixedly fitted on the rotating shaft, and the assembly plate is located in the internal space of the mounting cylinder, with a gap between it and the inner wall of the mounting cylinder, the output end of the rotary cylinder is fixedly connected to a rotating block, and the rotating block is rotatably mounted on the assembly plate, the rotating block is provided with at least a pair of arc-shaped push-pull grooves, a limiting block is provided on the outer wall of the assembly plate opposite to the push-pull grooves, a movable long plate is slidably inserted on the limiting block, and the movable long plate is slidably engaged with the push-pull grooves via a slider, and a friction plate is provided at the end of the movable long plate facing the friction ring.

[0011] In the above technical solution, preferably, a first baffle and a second baffle are also fixed inside the mounting cylinder. The first baffle and the second baffle are both arc-shaped structures and are disposed opposite to each other on the inner wall of the mounting cylinder.

[0012] In the above technical solution, preferably, a dust collection device is also included, which includes an exhaust fan and a dust collection pipe disposed at the output end of the exhaust fan, one end of which is connected to the internal space of the mounting cylinder.

[0013] In the above technical solution, preferably, the grinding wheel mechanism is assembled on the third drive seat, and the third drive seat is slidably mounted on the base.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By using a mounting cylinder with two operating windows, and a layout where the grinding wheel mechanism and observation plate correspond to different windows, the dangerous grinding operation is spatially isolated from personnel inspection and measurement. This effect fundamentally eliminates the risk of personnel coming into contact with the rotating grinding wheel, and at the same time eliminates the need to repeatedly start and stop or move the bulky grinding wheel mechanism, and also optimizes the overall work cycle.

[0016] The system uses a hand crank to drive a bevel gear set and a screw drive, which in turn drives a movable top rod to clamp the inner diameter of the coupling. This separates the clamping function from the power transmission function. The assembly head only matches the fixed mating groove to transmit power, eliminating the need to adapt to different coupling inner diameters and contact surfaces as with traditional conical assembly heads. This improves clamping stability, coaxiality, and equipment compatibility.

[0017] The drive stop component enables rapid engagement and disengagement of the driving force, as well as rapid braking of the rotational inertia of the coupling. This effect allows the equipment to quickly switch from grinding drive to workpiece stationary for inspection, solving the problem of long waiting time for inertial idling in traditional equipment, and significantly improving the overall utilization rate and processing efficiency of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a first-view structural diagram of the internal structure of the protective shell of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the protective shell of the present invention from a second perspective.

[0021] Figure 4 This is a schematic diagram of the positioning cylinder structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the positioning cylinder of the present invention;

[0023] Figure 6 This is a schematic diagram showing the position and structure of the friction ring and friction plate of the present invention;

[0024] Figure 7 This is a schematic diagram of the installation position of the rotary cylinder of the present invention;

[0025] Figure 8 This is a schematic diagram of the push-pull groove and movable long plate structure of the present invention;

[0026] Figure 9 This is a schematic diagram of the positioning cylinder structure after it is flipped over according to the present invention.

[0027] In the diagram: 1. Base; 2. Protective shell; 3. Controller; 4. Grinding wheel mechanism; 5. Feeding mechanism; 6. First motor; 7. Second motor; 8. First drive seat; 9. Mounting plate; 10. Second drive seat; 11. Assembly head; 12. Exhaust fan; 13. Dust suction pipe; 14. Third drive seat; 15. Mounting cylinder; 16. Rotating shaft; 17. First baffle; 18. Second baffle; 19. Observation plate; 20. Positioning cylinder; 21. Mounting bearing; 22. Hand crank; 23. Rotating rod; 24. Driving bevel gear; 25. Driven bevel gear; 26. Screw; 27. Movable top rod; 28. Fixed block; 29. ​​Connecting groove; 30. Friction ring; 31. Friction plate; 32. Assembly plate; 33. Rotary cylinder; 34. Rotating block; 35. Limiting block; 36. Movable long plate; 37. Push-pull groove. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0030] like Figures 1-9 The rough grinding equipment for corrosion protection of sucker rod couplings shown includes a base 1, on which a protective shell 2, a controller 3, and a grinding wheel mechanism 4 are mounted. A feeding mechanism 5 is also provided. All components are electrically connected to the controller 3 via wiring for centralized control. The feeding mechanism 5 includes a second drive seat 10 slidably mounted on the base 1 via a slide rail. The second drive seat 10 can drive the entire feeding mechanism 5 to move smoothly along the base 1, adapting to the position switching requirements for grinding and inspection. Among them, the mounting cylinder 15 on the second drive seat 10 is the core protection and working carrier. Its structure is cylindrical, with two large notches symmetrically opened on the cylinder wall as operating windows. The two notches have clear functions: one notch is used to avoid the grinding wheel grinding mechanism 4, leaving enough working space for grinding the surface of the grinding wheel coupling; the other notch is close to the user's operating area. After the positioning cylinder 20 drives the coupling to flip, the user can directly observe the grinding status and measure the size with calipers. Through the physical isolation of the mounting cylinder 15, the high-speed rotating grinding wheel grinding mechanism 4 can be separated from the user area, reducing safety risks from the structure.

[0031] A mounting plate 9 is bolted to the second drive base 10. A mounting cylinder 15 is welded and fixed to the mounting plate 9 and moves synchronously with the second drive base 10. A rotating shaft 16 is rotatably mounted inside the mounting cylinder 15 via a bearing. The rotating shaft 16 is arranged axially along the mounting cylinder 15. A flip-drive assembly on the second drive base 10 provides precise power for the rotation of the rotating shaft 16, ensuring the coupling can smoothly switch to the corresponding operating window. A clamping mechanism on one side of the rotating shaft 16 is used to fix the sucker rod coupling. Since the positioning cylinder 20 is mounted on the outside of the rotating shaft 16 via a mounting bearing 21, the mounting bearing 21 allows the positioning cylinder 20 to rotate freely relative to the rotating shaft 16, and one end of the positioning cylinder 20 is unobstructed, facilitating the insertion and removal of the coupling. The second drive base 10 also has a drive stop assembly, which provides stable rotational power during coupling grinding and enables rapid stopping during inspection, eliminating the need for grinding wheel stopping or relocation, thus balancing efficiency and safety.

[0032] The grinding wheel mechanism 4 is movably mounted on the base 1 via the third drive seat 14. The third drive seat 14 slides smoothly along the slide rail, causing the grinding wheel mechanism 4 to move closer to or away from the corresponding notch of the mounting cylinder 15. An observation plate 19 is mounted above the notch on the other side of the mounting cylinder 15. The observation plate 19 is made of transparent and impact-resistant material, allowing the user to view the grinding status of the coupling in real time without having to approach the grinding area, further improving operational safety. A first baffle 17 and a second baffle 18 are also welded and fixed inside the mounting cylinder 15. Both are arc-shaped structures, positioned opposite each other on the inner wall of the mounting cylinder 15, effectively preventing high-speed debris generated during grinding from splashing to both sides. At the same time, the second baffle 18 does not completely seal the inner wall of the mounting cylinder 15, specifically reserving a channel for debris flow to prevent debris from accumulating inside the cylinder.

[0033] The flipping drive assembly includes a first motor 6 fixed on the second drive seat 10 via a mounting base. The output end of the first motor 6 is connected to the rotating shaft 16 via a coupling. After starting, it can drive the rotating shaft 16 to drive the clamping mechanism to flip smoothly within the mounting cylinder 15, accurately switching the coupling to the grinding position and the inspection position. There is no need to move the grinding wheel grinding mechanism 4, avoiding the tedious operation of repeatedly calibrating the position. The clamping mechanism includes a positioning cylinder 20 set on the outside of the rotating shaft 16 via a mounting bearing 21. At least one pair of movable push rods 27 are slidably inserted inside the positioning cylinder 20. The movable push rods are arranged radially along the positioning cylinder 20. A hand crank 22 is rotatably mounted on the positioning cylinder 20 via a rotating rod 23. The rotating rod 23 passes through the side wall of the positioning cylinder 20 and a driving bevel gear 24 is fixedly mounted on it. At least one pair of driven bevel gears 25 are rotatably mounted on the inner wall of the positioning cylinder 20 via bearings, and the driven bevel gears 25 mesh with the driving bevel gears 24 for transmission. Each driven bevel gear 25 is fixedly mounted with a screw 26, which is arranged radially along the positioning cylinder 20. The movable push rod 27 is threadedly engaged with the corresponding screw 26. This transmission structure can convert the rotational power of the hand crank 22 into the radial movement of the movable push rod 27. Compared with the traditional clamping method of directly clamping the inner diameter of the coupling with a conical assembly head, this design achieves positioning by clamping the inner diameter of the coupling with the movable push rod 27. The assembly head 11 is only responsible for transmitting power and does not need to be adapted to different inner diameters and contact surfaces of couplings, which can improve clamping stability.

[0034] The drive stop assembly includes a second motor 7 slidably mounted on the mounting plate 9 via a first drive seat 8. The first drive seat 8 slides along the slide rail, driving the second motor 7 to move closer to or away from the positioning cylinder 20. The output end of the second motor 7 is provided with an assembly head 11. A fixing block 28 is welded and fixed to one side of the positioning cylinder 20. A mating groove 29 is provided on the fixing block 28. The mating groove 29 is adapted to the assembly head 11. After the assembly head 11 is inserted into the mating groove 29, the second motor 7 can drive the positioning cylinder 20 to rotate the coupling stably. Since the mating groove 29 is a fixed structure, the assembly head 11 only needs to be adapted to the fixing groove, without the need to adjust with the size of the coupling, thus improving adaptability.

[0035] The drive stop assembly also includes a stop unit, which includes a friction ring 30 welded to the fixed block 28. A rotary cylinder 33 is fixed on the rotating shaft 16 via an assembly plate 32. The assembly plate 32 is coaxially fixedly fitted onto the rotating shaft 16 and is located inside the mounting cylinder 15, with a gap between it and the inner wall of the mounting cylinder 15. The rotary cylinder 33 is fixed on the assembly plate 32, and a rotating block 34 is fixedly connected to the output end of the rotary cylinder 33. The rotating block 34 is rotatably mounted on the assembly plate 32 via a bearing. At least one pair of arc-shaped push-pull grooves 37 are provided on the rotating block 34. A limiting block 35 opposite to the push-pull groove 37 is welded to the outer wall of the assembly plate 32. A movable long plate 36 is slidably inserted into the limiting block 35. The movable long plate 36 has an L-shaped structure and slides with the push-pull groove 37 via a slider. A friction plate 31 is fixed to the end of the movable long plate 36 facing the friction ring 30 by bolts. The friction plate 31 is correspondingly set with the friction ring 30. The rotating block 34 is driven to rotate by the rotary cylinder 33. The rotational power can be converted into the opposite movement of the movable long plate 36 by the cooperation of the arc-shaped push-pull groove 37 and the slider, so that the friction plate 31 can quickly fit into the friction ring 30 and stop through friction. The response is rapid and stable.

[0036] The equipment also includes a dust collection device, which includes an exhaust fan 12 fixed to the base 1 by a bracket and a dust collection pipe 13 connected to the output end of the exhaust fan 12. The dust collection pipe 13 is an elastic flexible hose that can adapt to the movement of the mounting cylinder 15. One end of the hose is sealed and connected to the internal space of the mounting cylinder 15. Based on the relative sealing effect of the first baffle 17 and the second baffle 18 on the inside of the mounting cylinder 15, a local negative pressure environment can be formed. After the exhaust fan 12 is started, the debris generated by grinding can flow smoothly along the channel reserved in the second baffle 18 and be quickly absorbed by the dust collection pipe 13, so as to avoid the debris from polluting the environment and affecting the operating vision. At the same time, it can also reduce the wear of the debris on the transmission parts of the equipment.

[0037] In use, first pass the sucker rod coupling through the unrestricted end of the positioning cylinder 20 and fit it on the outer wall of the positioning cylinder 20. With the axial guidance of the positioning cylinder 20, the coupling is quickly positioned in the grinding area. Turn the hand crank 22 to drive the rotating rod 23 to rotate. The active bevel gear 24 on the rotating rod 23 rotates synchronously. Based on the meshing transmission between the active bevel gear 24 and the driven bevel gear 25, the screws 26 on each driven bevel gear 25 rotate synchronously. Since the movable push rod 27 is threadedly engaged with the screws 26 and the movable push rod 27 is slidably inserted into the positioning cylinder 20, its movement trajectory is precisely limited, thereby driving the movable push rod 27 to move smoothly outward radially and evenly press against the inner wall of the coupling to achieve coaxial limiting and fixing of the coupling. This fixing method is independent of the power transmission structure, so that the assembly head 11 does not need to undertake the clamping function, but only is responsible for transmitting rotational power. Compared with the traditional conical assembly head clamping method that adapts to different coupling inner diameters, it can improve clamping stability and coaxiality and reduce grinding deviation.

[0038] The first motor 6 is started, which drives the positioning cylinder 20 and the coupling to rotate slowly through the rotating shaft 16, so that the coupling is accurately flipped to the notch of the corresponding grinding wheel mechanism 4. The mounting cylinder 15 forms an effective isolation to prevent the grinding wheel debris from splashing to the user side. The first drive seat 8 is controlled to drive the second motor 7 to approach the mounting cylinder 15, so that the assembly head 11 at the output end is accurately embedded in the docking groove 29 of the fixing block 28. At this time, the second motor 7 is started, which can drive the positioning cylinder 20 to rotate the coupling at a uniform speed, providing power for uniform grinding. The third drive seat 14 is controlled to drive the grinding wheel mechanism 4 to slowly approach the coupling, and perform rough grinding on the surface of the coupling through the notch. At the same time, the second drive seat 10 drives the mounting plate 9, the mounting cylinder 15 and the second motor 7 to move back and forth synchronously, thereby driving the coupling to move back and forth along the axial direction, so that the grinding wheel can fully cover the surface of the coupling, improve the uniformity of grinding, and avoid the situation of local grinding not being in place.

[0039] During the grinding process, the exhaust fan 12 is started, and the grinding debris in the mounting cylinder 15 is absorbed through the suction pipe 13. The first baffle 17 and the second baffle 18 prevent the debris from splashing. At the same time, the channel reserved in the second baffle 18 allows the debris to be smoothly sucked into the suction pipe 13, improving the debris collection effect. The user can observe the grinding status of the coupling in real time through the observation panel 19 of the operation window on the other side, without having to get close to the grinding wheel mechanism, thus improving the safety of operation.

[0040] When it is necessary to test the grinding accuracy of the coupling, there is no need to shut down or move the grinding wheel mechanism 4. First, control the second drive seat 10 to stop reciprocating, and then control the first drive seat 8 to drive the second motor 7 to move to one side, so that the assembly head 11 is disengaged from the docking groove 29, and the positioning cylinder 20 loses its rotation power source. At this time, start the first motor 6 to drive the rotating shaft 16 to rotate, and flip the positioning cylinder 20 and the coupling to the notch close to the user. During the flipping process, the rotating cylinder 33 is started simultaneously, driving the rotating block 34 to rotate smoothly on the assembly plate 32. The rotating block 34 drives the movable long plate 36 to slide along the limit block 35 through the arc-shaped push-pull groove 37, and drives the friction plate 31 to quickly fit the friction ring 30. Since the friction ring 30 is connected to the fixed block 28 and the positioning cylinder 20 in sequence, the positioning cylinder 20 can be stopped quickly through friction, so that the coupling can be stabilized and stationary in a short time. This makes it convenient for the user to measure the size with calipers through the notch without moving the grinding wheel mechanism 4, avoiding the need to readjust the position of the grinding wheel mechanism 4, and improving the testing efficiency and operation safety.

[0041] After the inspection is completed, if further grinding is required, control the rotary cylinder 33 to reset, the friction plate 31 to disengage from the friction ring 30, and the first motor 6 to flip the coupling to the grinding position again, repeating the above grinding process; if the grinding is up to standard, turn the hand crank 22 in the opposite direction to retract the movable top rod 27, and the coupling can be removed to complete the rough grinding operation.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A coarse grinding treatment device for corrosion protection of sucker rod couplings, comprising a base (1), a protective shell (2), a controller (3), and a grinding wheel mechanism (4) disposed on the base (1), characterized in that, It also includes a feeding mechanism (5), which includes a second drive seat (10) slidably mounted on a base (1). The second drive seat (10) is provided with a mounting cylinder (15) via a mounting plate (9). Two operation windows are symmetrically opened on the cylinder wall of the mounting cylinder (15). A rotating shaft (16) is rotatably mounted inside the mounting cylinder (15). A flipping drive assembly is provided on the second drive seat (10). A clamping mechanism is provided on one side of the rotating shaft (16). A drive stop assembly is also provided on the second drive seat (10). The clamping mechanism includes a positioning cylinder (20) mounted on the outside of the rotating shaft (16) via a mounting bearing (21), and at least one pair of movable push rods (27) slidably inserted inside the positioning cylinder (20). A hand crank (22) is rotatably mounted on the positioning cylinder (20) via a rotating rod (23). An active bevel gear (24) is provided on the rotating rod (23). At least one pair of driven bevel gears (25) are provided on the inner wall of the positioning cylinder (20) and mesh with the active bevel gears (24) for transmission. Each driven bevel gear (25) is provided with a screw (26), and the movable push rod (27) is threadedly engaged with the corresponding screw (26). The drive stop assembly includes a second motor (7) that is slidably mounted on the mounting plate (9) via a first drive seat (8). The output end of the second motor (7) is provided with an assembly head (11). A fixing block (28) is provided on one side of the positioning cylinder (20). A docking groove (29) is provided on the fixing block (28), and the docking groove (29) is adapted to the assembly head (11). The drive stop assembly also includes a stop unit, which includes a friction ring (30) connected to the fixed block (28). A rotary cylinder (33) is provided on the rotating shaft (16) via an assembly plate (32). The assembly plate (32) is coaxially fixedly fitted on the rotating shaft (16) and is located in the internal space of the mounting cylinder (15), with a gap between it and the inner wall of the mounting cylinder (15). A rotating block (34) is fixedly connected to the output end of the rotary cylinder (33). The rotating block (34) is rotatably mounted on the assembly plate (32). At least one pair of arc-shaped push-pull grooves (37) are provided on the rotating block (34). A limiting block (35) opposite to the push-pull groove (37) is provided on the outer wall of the assembly plate (32). A movable long plate (36) is slidably inserted on the limiting block (35). The movable long plate (36) is slidably engaged with the push-pull groove (37) through a slider. A friction plate (31) is provided at one end of the movable long plate (36) facing the friction ring (30).

2. The coarse grinding treatment equipment for corrosion protection of sucker rod couplings according to claim 1, characterized in that, The grinding wheel mechanism (4) is movably mounted on the base (1) via the third drive seat (14), and is correspondingly set for one of the operation windows, while an observation plate (19) is mounted above the other operation window.

3. The coarse grinding treatment equipment for corrosion protection of sucker rod couplings according to claim 1, characterized in that, The flip drive assembly includes a first motor (6) mounted on a second drive seat (10), the output end of which is connected to the rotating shaft (16) via a transmission.

4. The coarse grinding treatment equipment for corrosion protection of sucker rod couplings according to claim 1, characterized in that, The mounting cylinder (15) is also fixed with a first baffle (17) and a second baffle (18). The first baffle (17) and the second baffle (18) are both arc-shaped structures and are disposed opposite to each other on the inner wall of the mounting cylinder (15).

5. The coarse grinding treatment equipment for corrosion protection of sucker rod couplings according to claim 1, characterized in that, It also includes a dust collection device, which includes a blower (12) and a dust collection pipe (13) disposed on the output end of the blower (12), one end of which is connected to the internal space of the mounting cylinder (15).

6. The coarse grinding treatment equipment for corrosion protection of sucker rod couplings according to claim 1, characterized in that, The grinding wheel mechanism (4) is mounted on the third drive seat (14), and the third drive seat (14) is slidably mounted on the base (1).

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