Multi-point type electric jar for disassembling crank pin of oil pumping unit

Abstract

The invention relates to the technical field of maintenance and repair equipment of mechanical mining equipment, in particular to a multi-point electric jar for disassembling a crank pin of an oil pumping unit. The multi-point type electric jar device for disassembling the crank pin of the oil pumping unit comprises a power device, a disassembling device and a supporting device, the power device comprises a crank connecting rod impact structure connected with a motor, a fixing frame is arranged on the power device and connected with the supporting device, and the supporting device comprises a rack seat provided with a rack. A movable seat assembly is arranged on the rack seat and connected with the fixing frame, a front stepping handle and a rear stepping handle are arranged on the rack seat, extension rods are arranged at the two ends in the rack rod, screw rods are arranged in the extension rods, tail screws, chuck fixing screws and crank pin hole chucks are arranged at the tail ends of the screw rods, and the output end of the power device is connected with the dismounting device. The multipoint type electric jar for disassembling the crank pin of the oil pumping unit is used for continuously jarring the crank pin after being fixed, the labor intensity is low, the weight is light, the efficiency is high, and tight parts can be disassembled.

Description

Technical Field

[0001] The invention relates to the technical field of maintenance and repair equipment for machine-mining equipment, and in particular to a multi-point electric jar for disassembling a crank pin of an oil pumping unit. Background Art

[0002] The oil pumping unit is an important extraction equipment in the oil industry. The crank pin is a key heavy-load transmission conversion component in the oil pumping unit transmission system. In actual work, it is necessary to disassemble and separate the crank and connecting rod from time to time, which is actually to disassemble the crank pin between the two. However, due to many factors such as the heavy load and long running time of the oil pumping unit, the crank pin is too tightly combined with the crank and connecting rod, making it difficult to disassemble and separate.

[0003] In the prior art, there are mainly the following methods for disassembling the crank pin. The first method, such as ZL2013200132853 pumping unit crank pin extractor or ZL2020200439255 a pumping unit crank pin removal tool system, uses a fixed support hammer to hammer the crank pin. The advantage of this method is low cost, but the labor intensity of manual hammering is high and the efficiency is low; the second method, such as ZL2010206252060 hydraulic pumping unit crank pin extractor, uses a fixed support hammer to hammer the crank pin. The handle pin extractor solution uses hydraulic components to push the crank pin out, which has a fast installation speed and good operation effect on loose crank pins, but the disadvantage is that there is a safety risk of parts flying out when removing tight crank pins; the third method, such as ZL2016204394755 rolling sliding hammer type pumping unit crank pin extraction device, uses a support rod and sliding hammer structure to manually drive the sliding hammer to shock the crank pin. Although it has a high degree of safety, the weight of the related components is large, the impact force is poor, and the installation and removal efficiency is low. Therefore, in view of the above shortcomings, a production well wellhead pressure relief device is proposed. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the shortcomings of the prior art, the present invention provides a multi-point electric jar for disassembling the crank pin of an oil pump, which solves the problems of high labor intensity and low efficiency when disassembling the crank pin, the risk of parts splashing when disassembling a tight crank pin, heavy tool weight, poor impact force, and low installation and disassembly efficiency.

[0005] (II) Technical solution In order to solve the above problems, the present invention provides a multi-point electric jar for disassembling a crank pin of an oil pumping unit, comprising: a power device, a disassembly device and a support device; The output end of the power device is provided with a universal impact seat, the universal impact seat is provided with an impact rod, the bottom of the universal impact seat is provided with a concentric annular groove and a through oil channel hole, and a steel ball is provided in the annular groove; The disassembly device is installed on the universal impact seat, and includes an impact rod and a crank pin shaft protection sleeve, one end of the crank pin shaft protection sleeve is provided with an impact groove and the other end is provided with a crank pin shaft clamping groove, one end of the impact rod is inserted into the universal impact seat and the other end corresponds to the impact groove, and the impact rod is fixed in the universal impact seat and a gap is left with the bottom end of the universal impact seat; The supporting device includes a movable seat assembly, a rack rod is provided in the movable seat assembly, a rack is provided above the rack rod, an extension rod is provided at each end of the rack rod, a screw rod is provided in each extension rod, the screw rod passes through the extension rod and is connected to the rack rod, one end of each screw rod is connected to the rack rod and a crank pin hole chuck is provided at the other end, a chuck fixing screw is provided on the inner side of each crank pin chuck and a tail screw is provided on the outer side, a supporting seat is provided on the movable seat assembly, and a power device is installed on the supporting seat.

[0006] Preferably, the power device comprises a crank-connecting rod impact mechanism and a motor as output ends, and the power device is provided with a front fixing frame and a rear fixing frame installed on a support seat.

[0007] Preferably, a rear stepping handle and a front stepping handle are respectively provided at the front and rear of the support seat on the movable seat assembly.

[0008] Preferably, the rear stepping handle and the front stepping handle are fixed to the moving seat assembly via a handle bayonet and a stepping wheel shaft, respectively; a travel gear is provided on the stepping wheel shaft and the handle bayonet, respectively, and the travel gear is meshed with a rack.

[0009] Preferably, a fixing handle is provided on the chuck fixing screw.

[0010] Preferably, both inner ends of the extension rod are provided with extension rod screw seats, and the inner threads of the extension rod screw seats match the screw rod.

[0011] Preferably, two sections inside the rack rod are provided with rack rod inner couplings, and a thread groove matching with the screw rod is provided inside the rack rod inner coupling.

[0012] Preferably, the impact rod is fixed to the universal impact seat via an impact rod locking pin.

[0013] (III) Beneficial effects The multi-point electric jar for disassembling the crank pin of the oil pump provided by the present invention solves the problems of high labor intensity, low efficiency and poor impact force when disassembling the crank pin by driving the crank-connecting rod impact mechanism through a motor; the crank-connecting rod impact mechanism drives the disassembly device to continuously jar the crank pin to remove the crank pin, thereby solving the problems of low efficiency when disassembling the crank pin and the risk of parts splashing when disassembling a stiff crank pin; the support device has a simple and light structure, which solves the problem of low installation and disassembly efficiency during work; the overall light weight of the device solves the problems of heavy tool weight and low installation and disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a multi-point electric jar for disassembling a crank pin of an oil pumping unit according to the present invention; Figure 2 It is a schematic diagram of the supporting structure of the multi-point electric jar for disassembling the crank pin of the oil pumping unit of the present invention; Figure 3 This is a structural diagram of a universal impact seat of a multi-point electric jar for disassembling a crank pin of an oil pumping unit according to the present invention; Figure 4 The present invention is a diagram for installing a universal impact seat of a multi-point electric jar for disassembling a crank pin of an oil pumping unit.

[0015] Among them, 1. tail screw; 2. screw rod; 3. crank pin hole chuck; 4. chuck fixing screw; 5. fixed handle; 6. extension rod; 7. rack rod; 8. rack; 9. front stepping handle; 10. moving seat assembly; 11. stepping wheel axle; 12. support seat; 13. handle pin; 14. rear stepping handle; 15. extension rod screw seat; 16. rack rod inner coupling; 17. threaded groove; 18. crank pin shaft protective cover; 19. crank pin shaft slot; 20. impact groove; 21. impact rod; 22. impact rod locking pin; 23. universal impact seat; 24. crank connecting rod impact mechanism; 25. front fixing frame; 26. rear fixing frame; 27. motor; 28. oil channel hole; 29. ​​annular groove; 30. steel ball. Implementation

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by “upper”, “lower”, “inside”, “outside”, “top”, “bottom”, etc. are all based on the orientations or positional relationships shown in the accompanying drawings. The purpose is only to facilitate the description of the present invention and simplify the description. It does not indicate or imply that the referred parts must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Embodiment 1:

[0018] like Figure 1-2 As shown, the present invention provides a multi-point electric jar for disassembling the crank pin of an oil pumping unit, which specifically includes: a power device, a disassembly device and a support device. The power device includes a crank connecting rod impact mechanism 24, a piston device, a gear reducer and a motor 27. After the motor 27 drives the gear to rotate, the crank connecting rod impact mechanism 24 drives the piston device to reciprocate in the cylinder body, thereby realizing high kinetic energy impact disassembly of the crank pin.

[0019] Among them, the power device technology is compatible with existing electric impact tools and can be replaced by existing electric impact devices during the production process, shortening the production cycle of the device.

[0020] It should be noted that a front fixing frame 25 and a rear fixing frame 26 arranged in parallel are provided below the power device to connect the power device with the supporting device.

[0021] In the present invention, the supporting device includes a movable seat assembly 10, which serves as a base for installing a power device. The movable seat assembly 10 is provided with a through hole extending left and right, and a rack rod 7 is provided in the through hole. An extension rod 6 is provided at each end of the rack rod, and a screw hole extending left and right and aligned with the movable seat assembly 10 is provided in the extension rod 6. A screw rod 2 is provided in the screw hole. By providing extension rods 6 at both ends of the rack rod 7, the extension rod 7 is further fixed to the screw rod 2, thereby preventing the connection between the rack rod 7 and the screw rod 2 from loosening due to the vibration of the power device during operation, thereby improving the safety and working efficiency of the device.

[0022] Among them, the two ends of the rack rod 7 are respectively provided with a rack rod inner coupling 16 for cooperating with the screw rod 2, and the rack rod inner coupling 16 is provided with a thread groove 17 cooperating with the screw rod 2; the two ends of the extension rod 6 are provided with an extension rod screw seat 15, and the extension rod screw seat 15 is provided with a thread cooperating with the screw rod 2.

[0023] It should be noted that the screw rod 2 passes through the rack rod 7 and the two extension rods 6 to connect the rack rod 7 and the two extension rods 6 together, and a crank pin empty chuck 3 is respectively passed through the two ends of the screw rod 2, and a tail screw 1 is provided on the outside of each crank pin hole chuck 3 on the screw rod 2, and a chuck fixing screw 4 is provided on the inside, and the threads in the chuck fixing screw 4 and the tail screw 1 cooperate with the screw rod 2, and the crank pin hole chuck 3 is adjusted to the specified position by adjusting the chuck fixing screw 4, and then the crank pin hole chuck 3 is fixed by adjusting the tail screw 1, and the device can be clamped in the pin holes near the crank pins on both sides by tightening the crank pin hole chucks 3 on both sides, and each of the chuck fixing screws 4 is provided with a fixing handle 5 to facilitate the adjustment of the chuck fixing screw 4.

[0024] Since there are different types of oil pumping units, the crank positions on both sides of the oil pumping unit can be changed by changing the length and combination mode of the screw 2, the extension rod 6, the rack rod 7, the crank pin hole chuck 3 and the moving assembly 10 to form implementation plans for different types of oil pumping units, thereby improving the applicability of the device.

[0025] like Figure 1 As shown, the movable seat assembly 10 is provided with a support seat 12 for connecting with a power device, and the support seat 12 is connected with a front fixing frame 25 and a rear fixing frame 26 .

[0026] Among them, a rack 8 is provided above the rack rod 7, and a front stepping handle 9 and a rear stepping handle 14 are respectively provided on the moving seat assembly 10 at the front and rear of the support seat 12. The front stepping handle 9 and the rear stepping handle 14 are respectively fixed to the moving seat assembly 10 through a stepping wheel shaft 11 and a handle pin 13. The stepping wheel shaft 11 and the handle pin 13 are respectively provided with traveling gears corresponding to the position of the rack 8. The traveling gear is meshed with the rack 8. By rotating the front stepping handle 11 and the rear stepping handle 14, the traveling gear is driven to rotate and can move forward and backward along the rack rod 7, thereby adjusting the position of the power device.

[0027] It should be noted that the front stepping handle 9 and the rear stepping handle 14 are respectively installed on the left and right sides of the moving seat assembly 10, so that the position of the power device can be adjusted on both sides of the device.

[0028] In the present invention, the disassembly device includes a crank pin shaft protection sleeve 18, an impact rod 21 and a universal impact seat 23, wherein the universal impact seat 23 is connected to the piston end of the crank connecting rod impact mechanism 24, the impact rod 21 is inserted into the universal impact seat 23 and fixed by the impact rod locking pin 22, when the power device is started, the crank connecting rod impact mechanism 24 drives the universal impact seat 23 to control the impact rod 21 to perform uninterrupted shocking action; one end of the crank pin shaft protection sleeve 18 is provided with a crank pin shaft clamp matching the crank pin shaft The crank pin protective sleeve 18 is screwed into the thread of the crank pin in the reverse direction during use, and then the impact rod 21 is aligned with the impact groove 20 during installation. When the device is installed, the impact rod 21 continuously shocks the crank pin protective sleeve 18 in the impact groove 20, thereby shocking the crank pin to loosen it. According to the different sizes of the crank pin to be disassembled, the crank pin protective sleeves 18 of different sizes can be replaced, thereby improving the practicality of the device. The bottom of the universal impact seat 23 is provided with a through oil passage hole 28 , and the oil passage hole 28 is connected to the piston cylinder area of ​​the power device, and the pressure oil is pushed by the movement of the piston cylinder to drive the impact rod 21 .

[0029] It should be noted that the basic structure of the crank pin electric disassembly tool of the present invention makes the present invention have a certain versatility in disassembling the crank-related components of the oil pumping unit, and at the same time has the ability to disassemble and install the fixing bolts of the related components. In actual applications, the ability to disassemble the crank pin sleeve can be achieved by changing the size and style of the crank pin protection sleeve 18. At the same time, by changing the structure of the tooling at the crank pin shaft to make it compatible with the present invention, such as processing the crank pin nut, the present invention can have the ability to vibrate and disassemble and install the crank pin nut.

[0030] The multi-point electric jar for disassembling the crank pin of the pumping unit provided in this embodiment can realize the simple and quick disassembly of the crank pin with low labor intensity. The specific operation process of the device is as follows: Step 1: Remove the nut of the crank pin, screw the crank pin shaft protection cover into the thread of the crank pin in reverse, and assemble the power device, disassembly device and support device.

[0031] Step 2: Adjust the crank pin hole chuck to the appropriate position and insert it into the pin hole closest to the crank pin. Then install the crank pin hole chuck on the other side into the pin hole closest to the corresponding crank pin, tighten the tail screw and fix the handle.

[0032] Step 3: Adjust the front step handle or the rear step handle to insert the impact rod into the impact slot and make appropriate adjustments to ensure the stability of the device.

[0033] Step 4, start the motor. At this time, the motor drives the power device to drive the impact rod through the universal impact seat to continuously impact the crank pin protective sleeve in the impact seat, thereby performing uninterrupted and strong shocks on the crank pin to be disassembled. After a single period of shock, the crank pin loosens and falls off, stops the motor, and recovers the device. Embodiment 2:

[0034] like Figure 3-4 As shown, on the basis of Example 1, the present invention further provides a solution for the case where the crank pin and the pin sleeve are not concentric. The difference from Example 1 is that an annular groove 29 is provided on the bottom edge of the universal impact seat 23, and a steel ball 30 is provided in the annular groove 29. When the device is started, due to the vibration of the universal impact seat 23 and the impact rod 21, the steel ball 30 continuously changes its position in the annular groove 29, thereby changing the impact direction of the impact rod 21 on the crank pin shaft protective sleeve, so that the device can continuously apply forces in different directions to the crank pin, thereby achieving high-frequency attempts at impacts at different positions, making it easier for the crank pin that is not concentric with the pin sleeve to loosen, thereby improving work efficiency.

[0035] The multi-point electric jar for disassembling the crank pin of the pumping unit provided in this embodiment can better disassemble the crank pin with eccentric offset, and the specific operation process is as follows: Step 1: Remove the nut of the crank pin, screw the crank pin shaft protection cover into the thread of the crank pin in reverse, place a steel ball in the annular groove, and assemble the power device, disassembly device and support device.

[0036] Step 2: Adjust the crank pin hole chuck to the appropriate position and insert it into the pin hole closest to the crank pin. Then install the crank pin hole chuck on the other side into the pin hole closest to the corresponding crank pin, tighten the tail screw and fix the handle.

[0037] Step 3: Adjust the front step handle or the rear step handle to insert the impact rod into the impact slot and make appropriate adjustments to ensure the stability of the device.

[0038] Step 4, start the motor. At this time, the motor-driven power device drives the impact rod through the universal impact seat to continuously impact the crank pin protective sleeve in the impact seat, thereby performing uninterrupted and strong shocks on the crank pin to be disassembled. At the same time, during the vibration of the impact rod and the universal impact seat, the steel ball continuously changes its position in the annular groove, causing the direction of the impact rod to continuously change during the injection process, and can apply forces in different directions to the crank pin that has undergone eccentric displacement, thereby achieving high-frequency attempts at impacts at different positions. After a period of shock, the crank pin loosens and falls off, the motor is stopped, and the device is recovered.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-point electric jar for disassembling a crank pin of an oil pump, characterized in that: include: Power plant, dismantling plant and support plant; The output end of the power device is provided with a universal impact seat (23), the universal impact seat (23) is provided with an impact rod (21), the bottom of the universal impact seat (23) is provided with a concentric annular groove (29) and a through oil channel hole (28), and a steel ball (30) is provided in the annular groove (29); The disassembly device is mounted on the universal impact seat (23), and comprises an impact rod (21) and a crank pin shaft protection sleeve (18); one end of the crank pin shaft protection sleeve (18) is provided with an impact groove (20) and the other end is provided with a crank pin shaft clamping groove (19); one end of the impact rod (21) is inserted into the universal impact seat (23) and the other end corresponds to the impact groove (20); The support device comprises a movable seat assembly (10), wherein a rack rod (7) is provided inside the movable seat assembly (10), a rack (8) is provided above the rack rod (7), an extension rod (6) is provided at each end of the rack rod (7), a screw rod (2) is provided inside each extension rod (6), the screw rod (2) passes through the extension rod (6) and is connected to the rack rod (7), one end of each screw rod (2) is connected to the rack rod (7) and the other end is provided with a crank pin hole chuck (3), each crank pin chuck (3) is provided with a chuck fixing screw (4) on the inner side and a tail screw (1) on the outer side, and a support seat (12) is provided on the movable seat assembly (10), and a power device is installed on the support seat (12).

2. The multi-point electric jar for disassembling the crank pin of the pumping unit according to claim 1, characterized in that: The power device comprises a crank-connecting rod impact mechanism (24) and a motor (27) as output ends. The power device is provided with a front fixing frame (25) and a rear fixing frame (26) which are mounted on a support seat (12).

3. The multi-point electric jar for disassembling the crank pin of the oil pumping unit according to claim 1, characterized in that: A rear stepping handle (14) and a front stepping handle (9) are respectively provided at the front and rear of the upper support seat (12) of the movable seat assembly (10).

4. The multi-point electric jar for disassembling the crank pin of the pumping unit according to claim 3, characterized in that: The rear stepping handle (14) and the front stepping handle (9) are respectively fixed to the moving seat assembly (10) via a handle bayonet (13) and a stepping wheel shaft (11); a travel gear is respectively provided on the stepping wheel shaft (11) and the handle bayonet (13); and the travel gear is meshed with a rack (8).

5. The multi-point electric jar for disassembling the crank pin of the oil pumping unit according to claim 1, characterized in that: The chuck fixing screw (4) is provided with a fixing handle (5).

6. The multi-point electric jar for disassembling the crank pin of the oil pumping unit according to claim 1, characterized in that: Extended rod screw seats (15) are provided at both ends of the interior of the extended rod (6), and the internal threads of the extended rod screw seats (15) match the screw rod (2).

7. The multi-point electric jar for disassembling the crank pin of the pumping unit according to claim 1, characterized in that: Two sections inside the rack rod (7) are provided with rack rod inner couplings (16), and a thread groove (17) matching with the screw rod (2) is provided inside the rack rod inner coupling (16).

8. The multi-point electric jar for disassembling the crank pin of the pumping unit according to claim 1, characterized in that: The impact rod (21) is fixed to the universal impact seat (23) via an impact rod locking pin (22).

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