Special hydraulic dismounting tool for crank pin of oil pumping unit

Abstract

The utility model relates to the technical field of oil pumping unit maintenance, in particular to a special hydraulic dismounting tool for an oil pumping unit crank pin, which comprises a bottom plate. A sliding rail is arranged on the outer side face of the bottom plate, a strip-shaped sliding block is slidably connected to the inner side face of the sliding rail, a second hydraulic telescopic rod is arranged in the middle of the left side face of the bottom plate, the end of the strip-shaped sliding block is rotationally connected with a supporting frame, a positioning sleeve is arranged on the outer side face of the supporting frame, and a first hydraulic telescopic rod is installed at the end, close to the second hydraulic telescopic rod, of the positioning sleeve. The special hydraulic disassembling tool for the crank pin of the oil pumping unit can be folded and stored, is convenient to unfold and carry during use, can accurately and efficiently unload the crank pin, causes less damage to the oil pumping unit in the crank pin disassembling process, and can effectively solve the problems in the background technology; and stable and controllable dismounting force is provided through the first hydraulic telescopic rod and the second hydraulic telescopic rod, the dismounting time is greatly shortened, and the working efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of oil pumping unit maintenance, in particular to a hydraulic dismounting tool special for a crank pin of an oil pumping unit. BACKGROUND

[0002] The oil pumping unit is a core equipment in oil exploitation, and the crank pin as a key transmission component bears the important function of converting the rotary motion of the motor into the reciprocating linear motion of the sucker rod. However, the crank pin is prone to failure due to wear, fatigue or corrosion in long-term operation and needs to be replaced or maintained regularly. The traditional dismounting method mainly relies on manual knocking, lever prying and other mechanical methods, which has the following problems: the dismounting process of the crank pin is time-consuming and labor-intensive, and the average dismounting time is more than 2 hours, resulting in low efficiency; manual operation is easy to cause the tool to slip or the parts to splash, causing personal injury; and the knocking method may damage the crank pin or the surrounding components, increasing the maintenance cost.

[0003] The common crank pin dismounting tools on the market mainly include mechanical pullers and hydraulic pullers, but they have significant defects in actual application: the mechanical puller relies on threaded transmission, has limited dismounting force, and is difficult to operate, and is difficult to cope with high-load scenarios; the hydraulic puller provides a larger dismounting force, but has a bulky structure, poor portability, and lacks precise positioning function, which is easy to cause the crank pin to be skewed or damaged during the dismounting process. CONTENT OF THE INVENTION

[0004] The application provides a hydraulic dismounting tool special for a crank pin of an oil pumping unit, which can be folded for storage, unfolded for use, is convenient to carry, can accurately and efficiently unload the crank pin, causes less damage to the oil pumping unit during the dismounting process of the crank pin, and can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: a hydraulic dismounting tool special for a crank pin of an oil pumping unit, comprising a bottom plate; a slide rail is arranged on the outer side of the bottom plate, a strip-shaped slide block is slidably connected to the inner side of the slide rail, a hydraulic telescopic rod two is arranged on the middle of the left side of the bottom plate, a support frame is rotatably connected to the end of the strip-shaped slide block, a positioning sleeve is arranged on the outer side of the support frame, and a hydraulic telescopic rod one is mounted on one end of the positioning sleeve close to the hydraulic telescopic rod two.

[0006] The telescopic end of the hydraulic telescopic rod one is provided with an internal thread sleeve two, the internal thread sleeve two is threadedly connected to the inner side of a top rod, the left end of the support frame is provided with an internal thread sleeve one, the internal thread sleeve one is threadedly connected to the inner side of a crank pin sleeve, and the top rod can pass through the crank pin sleeve.

[0007] Preferably, the outer side of the bottom plate is provided with not less than one through hole, and a long screw is mounted on the through hole.

[0008] Preferably, the number of slide rails is two, and the two slide rails are symmetrically arranged on the front and rear sides of the base plate.

[0009] Preferably, the outer side of the slide rail is provided with a handle.

[0010] Preferably, the support frame is rotatably connected to the end of the strip-shaped sliding block through a pin shaft.

[0011] Preferably, the strip-shaped sliding block is fixed together with the support frame through a bolt, and the telescopic end of the bolt is inserted into the bolt positioning hole on the support frame.

[0012] Preferably, the right end of the positioning sleeve is provided with a blind hole, and the blind hole is inserted into the telescopic end of the hydraulic telescopic rod two.

[0013] Preferably, the telescopic movement of the hydraulic telescopic rod one and the hydraulic telescopic rod two is controlled by an external hydraulic station.

[0014] Preferably, the outer side of the ejector rod is provided with not less than one disassembly hole for assisting disassembly operation.

[0015] Compared with the prior art, the beneficial effects of the present application are:

[0016] 1. The special hydraulic disassembly tool for the oil pumping machine crank pin adopts a foldable design, and can be quickly expanded and retracted through the slide rails and the strip-shaped sliding block, which is convenient for carrying and transportation, and is especially suitable for complex environments such as field operation and offshore platforms;

[0017] 2. The stable and controllable disassembly force is provided by the hydraulic telescopic rod one and the hydraulic telescopic rod two, the disassembly time is shortened from more than 2 hours of the traditional method to within 15 minutes, and the work efficiency is significantly improved; the precise cooperation between the ejector rod and the crank pin sleeve ensures that the disassembly process is fast and smooth;

[0018] 3. The fixing and guiding design of the bolt and the positioning sleeve avoids the tool slipping or the components splashing caused by improper operation of the traditional disassembly tool, reduces the risk of personnel injury, the hydraulic drive mode reduces the need for manual knocking, further improves the operation safety, and through uniform force and precise positioning, the damage to the crank pin and the surrounding components during disassembly is avoided, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the present application;

[0020] Figure 2 is a front view of the present application;

[0021] Figure 3 is a top view of the present application.

[0022] In the figure: 1 inner threaded sleeve one, 2 top rod, 3 dismounting hole, 4 inner threaded sleeve two, 5 hydraulic telescopic rod one, 6 strip-shaped sliding block, 7 sliding rail, 8 bottom plate, 9 long screw, 10 handle, 11 bolt, 12 support frame, 13 crank pin sleeve, 14 hydraulic telescopic rod two, 15 positioning sleeve, 16 bolt positioning hole, 17 pin shaft. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] In the description of the present application, if the orientation description such as "up", "down", "front", "back", "left", "right" and the like is involved, the orientation or positional relationship indicated is based on the drawings and is only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. When a certain feature is referred to as "provided", "fixed", "connected" to another feature, it can be directly provided, fixed or connected to the other feature, or indirectly provided, fixed or connected to the other feature. Figure 2 The orientation or positional relationship shown is only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. When a certain feature is referred to as "provided", "fixed", "connected" to another feature, it can be directly provided, fixed or connected to the other feature, or indirectly provided, fixed or connected to the other feature.

[0025] Please refer to Figures 1-3 The present application provides the following technical solutions: a special hydraulic dismounting tool for a pumping unit crank pin, comprising a bottom plate 8; the outer side of the bottom plate 8 is provided with a sliding rail 7, the inner side of the sliding rail 7 is slidably connected with a strip-shaped sliding block 6, the middle of the left side of the bottom plate 8 is provided with a hydraulic telescopic rod two 14, the end of the strip-shaped sliding block 6 is rotatably connected with a support frame 12, the outer side of the support frame 12 is provided with a positioning sleeve 15, and one end of the positioning sleeve 15 close to the hydraulic telescopic rod two 14 is installed with a hydraulic telescopic rod one 5.

[0026] Specifically, the sliding rail 7 is a U-shaped steel rail, the hydraulic telescopic rod two 14 can push out the strip-shaped sliding block 6 by elongation, thereby controlling the overall length of the equipment, so that the dismounting tool can be clamped on the pumping unit, and the hydraulic telescopic rod one 5 is used to eject the crank pin after elongation.

[0027] The telescopic end of the hydraulic telescopic rod one 5 is provided with an inner threaded sleeve two 4, the inner side of the inner threaded sleeve two 4 is threadedly connected with a top rod 2, the left end of the support frame 12 is provided with an inner threaded sleeve one 1, the inner side of the inner threaded sleeve one 1 is threadedly connected with a crank pin sleeve 13, and the top rod 2 can pass through the crank pin sleeve 13.

[0028] Specifically, the top rod 2 can be disassembled and replaced as needed, effectively improving the applicability of the disassembly tool.

[0029] Further, the outer side of the bottom plate 8 is provided with not less than one through hole, and a long screw 9 is installed on the through hole.

[0030] Specifically, the long screw 9 is fixed on the bottom plate 8 through a nut.

[0031] More specifically, the length of the long screw 9 can be adjusted according to the specific construction environment.

[0032] Further, the number of the slide rails 7 is two, and the two slide rails 7 are symmetrically arranged on the front and rear sides of the bottom plate 8.

[0033] Specifically, the arrangement of the two slide rails 7 increases the stability.

[0034] Further, the outer side of the slide rail 7 is provided with a handle 10.

[0035] Specifically, the arrangement of the handle 10 increases the portability.

[0036] Further, the support frame 12 is rotatably connected with the end of the strip-shaped sliding block 6 through a pin shaft 17.

[0037] Specifically, the arrangement of the pin shaft 17 allows the support frame 12 to be folded together with the slide rail 7, thereby further improving the portability.

[0038] Further, the strip-shaped sliding block 6 is fixed together with the support frame 12 through a bolt 11, and the extension end of the bolt 11 is inserted into the bolt positioning hole 16 on the support frame 12.

[0039] Specifically, after the support frame 12 is unfolded, the bolt 11 is inserted into the bolt positioning hole 16, thereby preventing the rotation of the support frame 12, and the bolt 11 is a spring bolt.

[0040] Further, the right end of the positioning sleeve 15 is provided with a blind hole, and the blind hole is inserted into the extension end of the hydraulic telescopic rod two 14.

[0041] Further, the extension of the hydraulic telescopic rod one 5 and the hydraulic telescopic rod two 14 is controlled by an external hydraulic station.

[0042] Specifically, the hydraulic pump of the hydraulic station is connected with the hydraulic telescopic rod one 5 and the hydraulic telescopic rod two 14 through a conduit.

[0043] Further, the outer side of the top rod 2 is provided with not less than one disassembly hole 3 for assisting the disassembly operation.

[0044] Specifically, when disassembling the ejector rod 2, a strip-shaped rod is inserted into the disassembling hole 3, and then the strip-shaped rod is rotated to conveniently disassemble the ejector rod 2.

[0045] In use: when disassembling the crank pin of the pumping unit support, first, the end cap, backup cap and crown nut of the crank pin are sequentially removed, then the support frame 12 is unfolded, the bolt 11 is inserted into the bolt positioning hole 16, the disassembling tool is placed in the middle position of the pumping unit support through the handle 10, then the crank pin sleeve 13 is sleeved at the end of the crank pin to be disassembled. After the hydraulic telescopic rod two 14 is extended and inserted into the positioning sleeve 15, the strip-shaped sliding block 6 is pushed out until the long screw 9 and the end of the crank pin sleeve 13 are respectively close to the two sides of the pumping unit support.

[0046] Then, the hydraulic telescopic rod one 5 is extended, the ejector rod 2 is inserted into the inside of the crank pin sleeve 13 through the end thereof, and the crank pin is ejected.

[0047] After the crank pin on one side is disassembled, the hydraulic telescopic rod two 14 is controlled to be retracted, the disassembling tool is rotated by 180 degrees, and the crank pin on the other side of the pumping unit support can be disassembled by using the same method.

[0048] It is worth noting that when the crank pin is disassembled, the central axis of the hydraulic telescopic rod one 5 is ensured to be located on the extension line of the central axis of the crank pin.

[0049] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A hydraulic pulling tool for a pumping unit crank pin, characterized by: Including the bottom plate (8), the outer side of the bottom plate (8) is provided with a slide rail (7), the inner side of the slide rail (7) is slidably connected with a strip-shaped sliding block (6), the middle part of the left side of the bottom plate (8) is provided with a hydraulic telescopic rod two (14), the end of the strip-shaped sliding block (6) is rotatably connected with a support frame (12), the outer side of the support frame (12) is provided with a positioning sleeve (15), one end of the positioning sleeve (15) close to the hydraulic telescopic rod two (14) is installed with a hydraulic telescopic rod one (5); The telescopic end of the hydraulic telescopic rod one (5) is provided with an internally threaded sleeve two (4), the inner side of the internally threaded sleeve two (4) is threadedly connected with a jacking rod (2), the left end of the support frame (12) is provided with an internally threaded sleeve one (1), the inner side of the internally threaded sleeve one (1) is threadedly connected with a crank pin sleeve (13), the jacking rod (2) can pass through the crank pin sleeve (13).

2. The hydraulic pulling tool for the pumping unit crank pin according to claim 1, characterized in that: The outer side of the bottom plate (8) is provided with not less than one through hole, and the long screw (9) is installed on the through hole.

3. The hydraulic pulling tool for the pumping unit crank pin according to claim 1, characterized in that: The number of the slide rail (7) is two, and the two slide rails (7) are symmetrically arranged on the front and rear sides of the bottom plate (8).

4. The hydraulic pulling tool for the pumping unit crank pin according to claim 1, characterized in that: The outer side of the slide rail (7) is provided with a handle (10).

5. The hydraulic pulling tool for the pumping unit crank pin according to claim 1, characterized in that: The support frame (12) is rotatably connected with the end of the strip-shaped sliding block (6) through a pin shaft (17).

6. The hydraulic pulling tool for the pumping unit crank pin according to claim 1, characterized in that: The strip-shaped sliding block (6) is fixed with the support frame (12) through a bolt (11), and the telescopic end of the bolt (11) is inserted into the bolt positioning hole (16) on the support frame (12).

7. The hydraulic pulling tool for the pumping unit crank pin according to claim 1, characterized in that: The right end of the positioning sleeve (15) is provided with a blind hole, and the blind hole is inserted into the telescopic end of the hydraulic telescopic rod two (14).

8. The hydraulic pulling tool for the pumping unit crank pin according to claim 1, characterized in that: The telescopic of the hydraulic telescopic rod one (5) and the hydraulic telescopic rod two (14) is controlled by an external hydraulic station.

9. The hydraulic pulling tool for the pumping unit crank pin according to claim 1, characterized in that: The outer side of the jacking rod (2) is provided with not less than one dismounting hole (3) for assisting the dismounting operation.

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