Multipurpose positioning pin puller for mineral oil disc separator and use method of multipurpose positioning pin puller

Abstract

The multipurpose positioning pin puller comprises a pin body connecting rod, one end of the pin body connecting rod is a connecting end, the connecting end is in threaded connection with a double-thread connector connected with a positioning pin, and the other end of the pin body connecting rod is provided with an end limiting device. The pin body connecting rod is sleeved with the end limiting device, the position of the end limiting device can be adjusted in the axial direction of the pin body connecting rod, the pin body connecting rod is further sleeved with a push block part, the push block part moves along the pin body connecting rod and generates pulling-out driving force on the positioning pin body, the guide positioning sleeve comprises a columnar sleeve part, one end of the sleeve part forms an operation platform face, and the other end of the sleeve part is connected with the pin body connecting rod. A through hole for the pin body connecting rod to penetrate through in a guiding mode is formed in the operation platform face, and a strong magnet is arranged at the bottom of the sleeve part. According to the multipurpose positioning pin puller for the mineral oil disc separator, different positioning pins with different internal threads in a rotary drum part can be pulled out by replacing one part, and multiple purposes are achieved through one object.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning pin removal tools, and specifically refers to a multi-purpose positioning pin puller for a mineral oil disc separator and its usage method. Background Art

[0002] A positioning pin puller is a special tool used to pull out positioning pins and is widely applied in the maintenance fields of mechanical equipment, tooling and molds, etc. A positioning pin is a precision positioning element commonly used in mechanical design and manufacturing. Its main function is to restrict the degrees of freedom of an object and ensure that components maintain an accurate positional relationship during assembly or operation. The puller is specifically designed to pull out these positioning pins to ensure smooth progress during maintenance or replacement of components.

[0003] The mineral oil disc separator has a high rotational speed and has relatively high requirements for the dynamic balance of the drum. In order to keep the dynamic balance of the drum unchanged after each disassembly and assembly, positioning pins are usually made on the heavy parts in the drum to make the installation position unique and ensure that the balance does not change significantly. The positioning pins will be worn during use, resulting in their no longer having a positioning function. Such positioning pins need to be replaced with new ones. Using a positioning pin puller, the positioning pins can be easily pulled out to complete the replacement work of the positioning pins.

[0004] In view of the above, it is necessary to propose a multi-purpose positioning pin puller for a mineral oil disc separator and its usage method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the above technical problems and provide a multi-purpose positioning pin puller for a mineral oil disc separator and its usage method.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A multi-purpose positioning pin puller for a mineral oil disc separator includes a pin body connecting rod. One end of the pin body connecting rod is a connection end, and a double-threaded joint connected to the positioning pin is screwed at the connection end. The other end is provided with an end limiting device. The end limiting device is sleeved on the pin body connecting rod and can adjust its position along the axial direction thereof. A push block part is also sleeved on the pin body connecting rod. The push block part moves along the pin body connecting rod and generates a pulling driving force on the positioning pin body. It also includes a guiding and positioning sleeve. The guiding and positioning sleeve includes a columnar sleeve part. One end of the sleeve part forms an operation platform surface, and a through hole for guiding the pin body connecting rod to pass through is provided on the operation platform surface. A strong magnet is provided at the bottom of the sleeve part.

[0007] Further, an external thread is formed on the surface of the pin body connecting rod. The double-threaded joint includes an internal threaded hole that is screwed with the external thread. The double-threaded joint axially extends and is provided with a threaded rod that matches the thread hole model of the positioning pin. The end limiting device is a handgrip handle screwed on the upper end of the pin body connecting rod. The pushing block part is a locking nut. The locking nut is screwed on the external thread and is placed outside the through hole. Rotate the locking nut and squeeze the operation platform to drive the pin body connecting rod to be pulled outwards.

[0008] Further, the end limiting device includes a sliding sleeve part. The sliding sleeve part is provided with an axial hole for the pin body connecting rod to pass through. The lower end of the axial hole is a small opening, and the upper end is a large opening. A slope-shaped funnel part that transitions from the small opening to the large opening is provided in the axial hole. A plurality of steel balls are provided inside the funnel part. A plurality of circles of shallow annular grooves are evenly distributed on the connecting rod. When the steel balls are caught in the shallow annular grooves, the end limiting device and the pin body connecting rod form a one-way lock. A ring-shaped end cover for blocking the opening is provided on the large opening side. A pressure ring is provided on the side of the steel ball away from the small opening. A compression spring is provided between the pressure ring and the ring-shaped end cover.

[0009] Further, the pushing block part includes an annular cylinder body and an annular push rod. The axis of the annular cylinder body is provided with a through hole for the pin body connecting rod to pass through. An annular oil groove is provided outside the through hole. The annular push rod is provided in the annular oil groove. The annular push rod is axially slidably connected in the annular oil groove. A oil pipe is connected to the inner bottom of the oil groove. The annular cylinder body is placed on the operation platform surface. The upper end surface of the annular push rod abuts against the lower end surface of the sliding sleeve part.

[0010] Further, the pushing block part includes a push plate. The push plate is arranged parallel to the operation platform surface and the push plate is attached to the lower end surface of the sliding sleeve part for pushing the end limiting device. Guide shafts are vertically provided on both sides of the upper end surface of the operation platform surface. A linear bearing is provided on the push plate. The linear bearing is slidably sleeved on the guide shaft. A spring is provided between the push plate and the operation platform surface.

[0011] Further, the pushing block part includes an outer piston cylinder and an inner piston cylinder. The outer piston cylinder is fixedly arranged on the lower end surface of the push plate. The lower end of the outer piston cylinder is an opening. The inner piston cylinder is placed into the outer piston cylinder through the opening and is slidably connected with it. The inner piston cylinder is provided with an upward opening. An impact cavity is provided at the upper end inside the outer piston cylinder. An impact rod is slidably arranged in the impact cavity. An impact block is slidably arranged in the inner piston cylinder. The upper end of the impact block impacts the lower end of the impact rod.

[0012] Further, a hinged ear seat is provided at the lower end of the inner piston cylinder. A cross shaft is rotatably connected in the hinged ear seat. The horizontal shaft of the cross shaft is rotatably connected in the hinged ear seat. A through hole is provided in the vertical shaft. A swing rod is slidably inserted into the through hole. The swing rod drives the inner piston to reciprocate up and down.

[0013] Further, a driving part of the swing rod is arranged on the operation platform surface. The driving part includes a rotating shaft and a swing bearing. The rotating shaft is rotatably connected to the operation platform surface, and the axis direction of the rotating shaft is parallel to that of the outer piston cylinder. The plane where the swing bearing is located forms an acute angle with the axis of the rotating shaft. The inner ring of the swing bearing is fixedly connected to the rotating shaft, and the outer ring of the swing bearing is fixedly connected to the swing rod.

[0014] Further, the driving part further includes a driving motor and a bevel gear set. The input gear of the bevel gear set is connected to the output end of the driving motor, and its output gear is connected to the rotating shaft.

[0015] A using method of a multi-purpose positioning pin extractor for a mineral oil disc separator includes the following steps: Select a double-threaded joint with the same internal thread specification as the positioning pin, and screw its threaded rod part into the positioning pin for connection and fixation; Hold the handle by hand, and screw the lower end of the pin body connecting rod into the internal thread hole to form a connection; Lower the guiding positioning sleeve, and make the strong magnet magnetically attract on the surface of the body of the disc separator to form a temporary fixation, then rotate the locking nut downward and press it tightly against the operation platform surface, and pull out the pin body connecting rod together with the positioning pin.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The multi-purpose positioning pin extractor for a mineral oil disc separator of the present invention can extract positioning pins with different internal threads in the drum component. By replacing one part, different positioning pins can be respectively pulled out, realizing multiple uses of one object. This tool is designed as a four-piece assembly. After three of the assemblies are installed, select a double-threaded joint according to the internal thread specification of the positioning pin. The double-threaded joint can be directly installed on the positioning pin (or installed on the tool), and then the assembly is installed. By rotating the locking nut, the double-threaded joint drives the positioning pin to pull out the drum part. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a multi-purpose positioning pin extractor for a mineral oil disc separator of the present invention; Figure 2 is a schematic structural diagram of a second embodiment of a multi-purpose positioning pin extractor for a mineral oil disc separator of the present invention; Figure 3 is a schematic structural diagram of a push plate in the present invention; Figure 4 is a state diagram when the inner piston cylinder moves to the upper dead center; Figure 5 is a state diagram when the inner piston cylinder moves to the lower dead center; In the figure: 1. Pin body connecting rod; 2. Double-threaded joint; 3. End limiting device; 4. Pusher block part; 5. Guide positioning sleeve; 6. Sleeve part; 7. Operating platform surface; 8. Through hole; 9. Strong magnet; 10. External thread; 11. Internal screw hole; 12. Threaded rod; 13. Hand grip; 14. Locking nut; 15. Sliding sleeve part; 16. Axial hole; 17. Small opening; 18. Large opening; 19. Funnel part; 20. Steel ball; 21. Shallow ring groove; 22. Annular end cover; 23. Pressure ring; 24. Compression spring; 25. Annular cylinder block; 26. Annular push rod; 27. Annular oil groove; 28. Oil pipe; 29. Push plate; 30. Guide shaft; 31. Linear bearing; 32. Spring; 33. Outer piston cylinder; 34. Inner piston cylinder; 35. Impact cavity; 36. Impact rod; 37. Impact block; 38. Hinge ear seat; 39. Cross shaft; 40. Through hole; 41. Swing rod; 42. Rotating shaft; 43. Swing bearing; 44. Acute angle; 45. Driving motor; 46. Bevel gear set. Specific embodiments

[0018] Next, in combination with the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Embodiment 1: A multi-purpose positioning pin extractor for a mineral oil disc separator, as Figure 1 shown, includes a pin body connecting rod 1. One end of the pin body connecting rod 1 is a connecting end. An external thread 10 is formed on the surface of the pin body connecting rod 1. A double-threaded joint 2 connected to the positioning pin is screwed on the connecting end. The double-threaded joint 2 includes an internal screw hole 11 screwed with the external thread 10. The double-threaded joint 2 axially extends with a threaded rod 12 matching the screw hole model of the positioning pin. In actual use, various models of double-threaded joints 2 can be set so that the models of the threaded rods 12 are different, thereby increasing the application range of this tooling.

[0020] An end limiting device 3 is provided at the other end of the pin body connecting rod 1. The end limiting device 3 is sleeved on the pin body connecting rod 1 and can adjust its position axially. As Figure 1 shown, the end limiting device 3 in this embodiment is a hand grip 13 screwed on the upper end of the pin body connecting rod 1. During installation, the hand grip 13 is screwed on the external thread 10, and a positioning screw is laterally screwed in so that the positioning screw penetrates into the pin body connecting rod 1, thereby positioning the hand grip 13 to prevent it from rotating again. Thus, during subsequent use, the connecting end can be screwed into the internal screw hole 11 by holding the hand grip 13 and rotating, and the pin body connecting rod 1 can be held for positioning and restricted from rotating during the subsequent screwing process of the locking nut 14.

[0021] A push block part 4 is also sleeved on the pin body connecting rod 1. The push block part 4 moves along the pin body connecting rod 1 and generates a pulling driving force on the positioning pin body. As Figure 1 shown, the push block part 4 is a lock nut 14. The lock nut 14 is screwed on the external thread 10. A guiding and positioning sleeve 5 is further included. The guiding and positioning sleeve 5 includes a columnar sleeve part 6. One end of the sleeve part 6 forms an operation platform surface 7. A through hole 8 for guiding the pin body connecting rod 1 to pass through is arranged on the operation platform surface 7. A strong magnet 9 is arranged at the bottom of the sleeve part 6. The lock nut 14 is placed outside the through hole 8. The lock nut 14 is rotated to squeeze the operation platform to drive the pin body connecting rod 1 to be pulled outwards.

[0022] During actual use, a double-threaded joint 2 with the same internal thread specification as the positioning pin is selected. Its threaded rod 12 part is screwed into the positioning pin for connection and fixation. Hold the handgrip 13 by hand, and screw the lower end of the pin body connecting rod 1 into the internal thread hole 11 to form a connection. Let the guiding and positioning sleeve 5 drop, and make the strong magnet 9 magnetically attract on the surface of the body of the butterfly separator to form a temporary fixation. Then rotate the lock nut 14 downwards and press it tightly on the operation platform surface 7, and pull out the pin body connecting rod 1 together with the positioning pin.

[0023] Embodiment 2: Since in Embodiment 1, it is necessary to manually turn the lock nut 14 to pull out the positioning pin, which is rather laborious. As an improvement, in this embodiment, the driving force of hydraulic oil is utilized to act on the end limiting device 3, so that the positioning pin can be easily pulled out. Specifically, as Figure 2As shown, the end limiting device 3 includes a sliding sleeve portion 15. The sliding sleeve portion 15 is provided with an axial hole 16 for the supply body connecting rod 1 to pass through. The lower end of the axial hole 16 is a small opening 17, and the upper end is a large opening 18. Inside the axial hole 16, there is a sloped funnel portion 19 that transitions from the small opening 17 to the large opening 18; inside the funnel portion 19, there are multiple steel balls 20. The connecting rod is evenly distributed with several circles of shallow annular grooves 21. When the steel balls 20 are stuck in the shallow annular grooves 21, the end limiting device 3 and the pin body connecting rod 1 form a one-way lock; on the side of the large opening 18, there is an annular end cover 22 that seals the opening. On the side of the steel balls 20 away from the small opening 17, there is a pressure ring 23, and between the pressure ring 23 and the annular end cover 22, there is a compression spring 24. During use, the end limiting device 3 is sleeved onto the upper end of the pin body connecting rod 1. When the end limiting device 3 moves downward relative to the pin body connecting rod 1, it can move freely; conversely, when the end limiting device 3 tends to move upward relative to the pin body connecting rod 1, it is limited, causing the pin body connecting rod 1 and the end limiting device 3 to be connected as a whole; since multiple circles of shallow annular grooves 21 are formed on the surface of the pin body connecting rod 1, and the steel balls 20 inside the sliding sleeve portion 15 are guided by the funnel portion 19 of the inclined surface. When the sliding sleeve portion 15 has a tendency to move upward relative to the pin body connecting rod 1, the steel balls 20 can be stuck in the shallow annular grooves 21, and under the guidance of the funnel portion 19 of the inclined surface and the assistance of the pressure of the compression spring 24, they can be stuck tighter and tighter, thus making the pin body connecting rod 1 and the end limiting device 3 form a whole; conversely, when the sliding sleeve portion 15 has a tendency to move downward, due to the funnel portion 19 having a large upper opening and a small lower opening, when the sleeve portion 6 moves downward, the steel balls 20 can be released from the shallow annular grooves 21, so that the end limiting device 3 can move downward relative to the pin body connecting rod 1. It can be understood that when it is necessary to move the end limiting device 3 upward, an external force is required to pull the pressure ring 23 upward and compress the compression spring 24. At this time, the steel balls 20 are not squeezed, and the end limiting device 3 can freely move up and down the position of the pin body connecting rod 1.

[0024] Furthermore, in this embodiment, the push block portion 4 includes an annular cylinder body 25 and an annular push rod 26. The axis of the annular cylinder body 25 is provided with a through hole 8 for the supply body connecting rod 1 to pass through. Outside the through hole 8, there is an annular oil groove 27. Inside the annular oil groove 27, there is an annular push rod 26. The annular push rod 26 is slidably connected along the axis inside the annular oil groove 27. The inner bottom of the oil groove is connected with an oil pipe 28, as Figure 2As shown, the annular cylinder block 25 is placed on the operation platform surface 7, and the upper end surface of the annular push rod 26 abuts against the lower end surface of the sliding sleeve portion 15. In actual use, the oil pipe 28 is connected to the hydraulic oil supply end, which can be a hand-operated pump. When the hydraulic oil is pressed into the annular oil groove 27, the hydraulic oil can push the annular push rod 26 upward. Under the continuous pressure extrusion of the hydraulic oil, the end limit device 3 can be pushed, and together with the pin body connecting rod 1, it can be pulled out upward by a certain distance. If the positioning pin is longer and exceeds the stroke of the annular push rod 26, it can be pushed multiple times. That is, after pushing once, the annular push rod 26 is lowered, and then the end limit device 3 is pressed down to move it downward relative to the pin body connecting rod 1, and then hydraulic pushing is used again. After multiple pushing operations, the longer positioning pin can be pulled out; in this embodiment, the positioning pin can be easily pulled out by using hydraulic oil, which has the advantages of convenient use and labor saving.

[0025] Embodiment Three: In this embodiment, it is another embodiment of the push block portion 4. Specifically, as Figure 3 shown, the push block portion 4 includes a push plate 29, the push plate 29 is arranged parallel to the operation platform surface 7, and the push plate 29 is attached to the lower end surface of the sliding sleeve portion 15 for pushing the end limit device 3; on both sides of the upper end surface of the operation platform surface 7, guide shafts 30 are vertically provided. A linear bearing 31 is provided on the push plate 29, and the linear bearing 31 is slidably sleeved on the guide shaft 30. A spring 32 is provided between the push plate 29 and the operation platform surface 7. As a component of the push block portion 4, the push plate 29 transmits the thrust to push the end limit device 3 upward, and then pulls out the positioning pin. In order to enable the push plate 29 to move up and down parallelly, the linear bearing 31 and the guide shaft 30 are used to limit its translation so that it can slide up and down parallelly. The push plate 29 is held at a position fitting the bottom surface of the sliding sleeve portion 15 by the spring 32.

[0026] Furthermore, as Figure 4 、 5As shown, the pushing block part 4 includes an outer piston cylinder 33 and an inner piston cylinder 34. The outer piston cylinder 33 is fixedly arranged on the lower end surface of the push plate 29. The lower end of the outer piston cylinder 33 is open. The inner piston cylinder 34 is inserted into the outer piston cylinder 33 through this opening and is slidably connected thereto. The inner piston cylinder 34 is provided with an upward opening. An impact cavity 35 is provided at the upper end inside the outer piston cylinder 33. An impact rod 36 is slidably arranged in the impact cavity 35. An impact block 37 is slidably arranged in the inner piston cylinder 34. The upper end of the impact block 37 impacts the lower end of the impact rod 36. Restricted by the impact cavity 35, the impact rod 36 can move up and down inside it, but cannot be laterally displaced. The lower end of the impact rod 36 passes through the impact cavity 35 and extends into the outer piston cylinder 33. Under the action of gravity, the impact rod 36 slides to the lower side. The impact block 37 also moves back and forth axially up and down in the piston cylinder, and forms a striking action on the impact rod 36 when moving upward, thereby upwardly impacting and pushing the impact rod 36 to push the push plate 29 to push the end limiting device 3 upward. In this embodiment, compared with the second embodiment, this embodiment is an intermittent hammering, so it has a better loosening effect on the positioning pin, and thus facilitates the extraction of the positioning pin; Further, the thrust for driving the impact block 37 comes from the reciprocating up and down movement of the inner piston cylinder 34. Actually, the impact block 37 forms a free piston body and slides up and down in the inner piston cylinder 34. When the inner piston cylinder 34 moves downward, the gas between the inner piston cylinder 34 and the impact block 37 expands and the internal pressure drops, which can form a downward pulling effect on the impact block 37. And with the self-weight of the impact block 37, the impact block 37 can be accelerated downward movement, as Figure 5 is the state diagram when the inner piston cylinder 34 moves to the lower dead center. Then the inner piston cylinder 34 moves upward. Under the combined action of the downward falling trend of the impact block 37, the gas in the cylinder is compressed, and the impact block 37 is pushed upward, as Figure 4 shown is the state diagram when the inner piston cylinder 34 moves to the upper dead center. The impact block 37 quickly impacts the impact rod 36 upward under the push of the high-pressure gas, thereby forming a knocking force, and such actions are repeated in a cycle.

[0027] Further, a hinged ear seat 38 is provided at the lower end of the inner piston cylinder 34. A cross shaft 39 is rotatably connected in the hinged ear seat 38. The horizontal axis of the cross shaft 39 is rotatably connected to the hinged ear seat 38. A through hole 40 is provided in the vertical axis. A swing rod 41 is slidably inserted into the through hole 40. The swing rod 41 drives the inner piston to reciprocate up and down. In this embodiment, the up and down movement of the inner piston cylinder 34 is converted into an up and down driving force through the swing of the swing rod 41 via the cross shaft 39, so as to drive the inner piston cylinder 34 to reciprocate up and down.

[0028] As Figure 4 、 5As shown, a driving part of the swing rod 41 is provided on the operation platform surface 7. The driving part includes a rotating shaft 42 and a swing bearing 43. The rotating shaft 42 is rotatably connected to the operation platform surface 7, and the axis direction of the rotating shaft 42 is parallel to that of the outer piston cylinder 33. The plane where the swing bearing 43 is located forms an acute angle 44 with the axis of the rotating shaft 42. The inner ring of the swing bearing 43 is fixedly connected to the rotating shaft 42, and the outer ring of the swing bearing 43 is fixedly connected to the swing rod 41. Since the swing bearing 43 and the rotating shaft 42 are arranged at an acute angle 44, and the cross shaft 39 can limit the rotation of the swing rod 41, when the rotating shaft 42 rotates, the swing rod 41 forms a fan-shaped swing motion up and down. In actual use, the structure of the driving part is not limited, and the reciprocating drive of the inner piston cylinder 34 can also be carried out by using the connection mode of an eccentric shaft and a connecting rod.

[0029] Further, the driving part further includes a driving motor 45 and a bevel gear set 46. The input gear of the bevel gear set 46 is connected to the output end of the driving motor 45, and its output gear is connected to the rotating shaft 42. The driving motor 45 drives the rotating shaft 42 to rotate through the bevel gear set 46, so that the swing rod 41 can swing up and down in the vertical direction and drive the inner piston cylinder 34 to move.

[0030] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A multi-purpose positioning pin puller for a mineral oil disc separator, comprising a pin body connecting rod (1), characterized in that: One end of the pin body connecting rod (1) is a connecting end, the connecting end is threadedly provided with a double threaded joint (2) connected to the positioning pin, and the other end is provided with an end limit device (3), the end limit device (3) is sleeved on the pin body connecting rod (1) and can adjust the position along its axial direction. The pin body connecting rod (1) is also sleeved with a push block portion (4), the push block portion (4) moves along the pin body connecting rod (1) and generates a pulling-out driving force for the positioning pin body, and also includes a guide positioning sleeve (5), the guide positioning sleeve (5) includes a columnar sleeve portion (6), one end of the sleeve portion (6) forms an operating platform surface (7), the operating platform surface (7) is provided with a through hole (8) for the pin body connecting rod (1) to pass through, and a strong magnet (9) is provided at the bottom of the sleeve portion (6).

2. A multi-purpose positioning pin puller for a mineral oil disc separator according to claim 1, characterized in that: The pin body connecting rod (1) is provided with an external thread (10) on its surface; the double thread joint (2) comprises an internal thread hole (11) threadedly connected to the external thread (10); the double thread joint (2) extends axially and is provided with a threaded rod (12) matching the thread hole model of the positioning pin; the end limit device (3) is a hand grip (13) threadedly connected to the upper end of the pin body connecting rod (1); the push block portion (4) is a locking nut (14); the locking nut (14) is threadedly connected to the external thread (10) and is placed outside the through hole (8); the locking nut (14) is rotated and the operating platform is squeezed to drive the pin body connecting rod (1) to be pulled outward.

3. A multi-purpose positioning pin puller for a mineral oil disc separator according to claim 1, characterized in that: The end stop device (3) comprises a sleeve portion (15), the sleeve portion (15) being provided with an axial hole (16) for the pin body connecting rod (1) to pass through, the axial hole (16) having a small opening (17) at the lower end and a large opening (18) at the upper end, and a sloped funnel portion (19) transitioning from the small opening (17) to the large opening (18) being provided in the axial hole (16); a plurality of steel balls (20) being provided inside the funnel portion (19), a plurality of shallow annular grooves (21) being evenly distributed on the connecting rod, and when the steel balls (20) are inserted into the shallow annular grooves (21), the end stop device (3) and the pin body connecting rod (1) are locked in a one-way manner; an annular end cover (22) for blocking the large opening (18) is provided on the side of the large opening (18), a pressure ring (23) is provided on the side of the steel ball (20) away from the small opening (17), and a compression spring (24) is provided between the pressure ring (23) and the annular end cover (22).

4. A multi-purpose positioning pin puller for a mineral oil disc separator according to claim 3, characterized in that: The push block portion (4) comprises an annular cylinder body (25) and an annular push rod (26). The axis of the annular cylinder body (25) is provided with a through hole (8) for the pin body connecting rod (1) to pass through. An annular oil groove (27) is provided outside the through hole (8). An annular push rod (26) is provided in the annular oil groove (27). The annular push rod (26) is axially slidably connected in the annular oil groove (27). An oil pipe (28) is connected to the inner bottom of the oil groove. The annular cylinder body (25) is placed on the operating platform surface (7), and the upper end surface of the annular push rod (26) is pressed against the lower end surface of the sliding sleeve portion (15).

5. A multi-purpose positioning pin puller for a mineral oil disc separator according to claim 3, characterized in that: The push block portion (4) comprises a push plate (29), the push plate (29) is arranged parallel to the operating platform surface (7), and the push plate (29) is attached to the lower end surface of the sliding sleeve portion (15) for pushing the end limit device (3); guide shafts (30) are vertically arranged on both sides of the upper end surface of the operating platform surface (7), and a linear bearing (31) is arranged on the push plate (29), and the linear bearing (31) is slidably sleeved on the guide shaft (30); a spring (32) is arranged between the push plate (29) and the operating platform surface (7).

6. A multi-purpose positioning pin puller for a mineral oil disc separator according to claim 5, characterized in that: The push block portion (4) comprises an outer piston cylinder (33) and an inner piston cylinder (34). The outer piston cylinder (33) is fixedly arranged on the lower end surface of the push plate (29). The lower end of the outer piston cylinder (33) is an opening. The inner piston cylinder (34) is inserted into the outer piston cylinder (33) through the opening and is slidably connected with the outer piston cylinder (33). The inner piston cylinder (34) is provided with an upward opening. An impact cavity (35) is provided at the upper end of the inner part of the outer piston cylinder (33). An impact rod (36) is slidably arranged in the impact cavity (35). An impact block (37) is slidably arranged in the inner piston cylinder (34). The upper end of the impact block (37) strikes the lower end of the impact rod (36).

7. A multi-purpose positioning pin puller for a mineral oil disc separator according to claim 6, characterized in that: A hinged ear seat (38) is provided at the lower end of the inner piston cylinder (34), and a cross shaft (39) is rotatably connected inside the hinged ear seat (38). The transverse axis of the cross shaft (39) is rotatably connected to the hinged ear seat (38), and a through hole (40) is provided inside the longitudinal axis. A swing rod (41) is slidably inserted into the through hole (40), and the swing rod (41) drives the inner piston to reciprocate up and down.

8. A multi-purpose positioning pin puller for a mineral oil disc separator according to claim 7, characterized in that: A driving part of a rocker arm (41) is provided on the operating platform surface (7), and the driving part comprises a rotating shaft (42) and a swing bearing (43). The rotating shaft (42) is rotatably connected and arranged on the operating platform surface (7). The rotating shaft (42) is parallel to the axial direction of the outer piston cylinder (33). The plane where the swing bearing (43) is located forms an acute angle (44) with the axis of the rotating shaft (42). The inner ring of the swing bearing (43) is fixedly connected to the rotating shaft (42), and the outer ring of the swing bearing (43) is fixedly connected to the rocker arm (41).

9. A multi-purpose positioning pin puller for a mineral oil disc separator according to claim 8, characterized in that: The driving unit further comprises a driving motor (45) and a bevel gear set (46), wherein an input gear of the bevel gear set (46) is connected to an output end of the driving motor (45), and an output gear of the bevel gear set (46) is connected to a rotating shaft (42).

10. A method for using a multi-purpose positioning pin puller for a mineral oil disc separator, characterized in that: The following steps are involved: Select a double threaded joint (2) with the same specification as the inner thread of the positioning pin, screw its threaded rod (12) into the positioning pin for connection and fixation; hold the hand grip (13) and screw the lower end of the pin body connecting rod (1) into the inner thread hole (11) to form a connection; drop the guide positioning sleeve (5) and allow the strong magnet (9) to be magnetically attracted to the surface of the butterfly separator body to form a temporary fixation; then rotate the locking nut (14) downward and press it against the operating platform surface (7), and pull out the pin body connecting rod (1) together with the positioning pin.

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