Special tool for oil field pump maintenance

Abstract

The utility model belongs to the technical field of oil field equipment maintenance, and particularly relates to a special tool for oil field pump maintenance, which is characterized in that a high-speed direct-drive gear and a high-torque stress application gear are connected in parallel, and a shifting rod is combined to switch a gear power transmission path, so that two working conditions of'speed priority 'and'torque priority' are quickly switched by a single motor; according to the tool, rapid loosening of the bolts and attacking of large-torque bolts such as rusted bolts are achieved, the operation efficiency of the tool is improved, meanwhile, the tool is integrally thin due to the arrangement of the gear ring and the sleeve, the size of the head of the tool is further compressed, the high-torque requirement and the narrow space operation characteristic of oil field pump bolt dismounting are met, and therefore the use convenience of the tool is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oilfield equipment maintenance, and particularly relates to a special tool for repairing oilfield pumps and motors. Background Art

[0002] In oilfield production, pumps and motors, as the core equipment for crude oil transportation, pressurization and process flow drive, are in high-temperature, high-pressure, strong-corrosion and high-vibration working conditions for a long time. The fastening bolts at key parts such as the top flange and bearing seat are prone to torque attenuation or fracture due to fatigue and corrosion, and need to be regularly overhauled.

[0003] However, the top structure of existing oilfield pumps and motors is compact, and the operating height between some bolts is insufficient. Due to their large volume, traditional electric tools are difficult to enter narrow areas. Especially during the disassembly and assembly of vertical upward or inclined bolts, the probability of interference between the tools and surrounding components is high. It is necessary to repeatedly disassemble the surrounding components, and the disassembly of a single bolt takes an extremely long time, with low efficiency and easy damage to the equipment.

[0004] At the same time, the designed torque of existing pump and motor bolts is generally high. However, existing electric wrenches are limited by the motor power and transmission efficiency, and are prone to jamming or overload shutdown when encountering rusty bolts, with a high failure rate. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a special tool for repairing oilfield pumps and motors to solve the problems mentioned in the background art.

[0006] To achieve the above technical purpose, the technical scheme adopted by the utility model is as follows:

[0007] A special tool for repairing oilfield pumps and motors includes a housing. A handle is installed at the rear side of the housing. A gear ring is rotatably installed at the front side inside the housing. A sleeve is installed inside the gear ring. The left and right sides of the rear side of the gear ring are hinged with a lever. A pinion meshing with the gear ring is rotatably installed at the front side of the lever. A conversion gear is rotatably installed at the rear side of the lever. First sprockets are installed on the upper sides of the pinion and the conversion gear respectively. A first chain is connected between the two first sprockets. A switching component for controlling the left and right rotation of the lever is installed in the middle of the housing.

[0008] A direct drive gear that matches it is rotatably installed on the left side of the conversion gear. A first bevel gear that is drivingly connected to it is rotatably installed above the direct drive gear. A second bevel gear that meshes with it is rotatably installed on the side of the first bevel gear. A boosting gear that matches it is rotatably installed on the right side of the conversion gear. A worm gear that is drivingly connected to it is rotatably installed above the boosting gear. A worm that meshes with the worm gear is installed on the side of the worm gear. Second sprockets are drivingly connected to the rear sides of both the worm and the second bevel gear. A second chain is connected between the two second sprockets. A reduction motor is installed at the rear of the housing. The output end of the reduction motor is drivingly connected to one of the second sprockets.

[0009] The switching assembly includes a lead screw rotatably connected to the housing. A small motor is fixed to the side of the housing. The output end of the small motor is drivingly connected to the lead screw. A slider is threadedly connected to the middle of the lead screw. A card slot is provided on the upper side of the slider. A control rod is rotatably installed on the upper side of the shift lever. A shift piece is fixed to the upper side of the control rod. The front side of the shift piece is slidably connected to the card slot in the front and back directions.

[0010] The shift piece is an elastic piece.

[0011] Limit slots are evenly provided on the inner side of the gear ring. The number of sleeves is multiple, and a plurality of limit edges that match the limit card slots are provided on the outer side of the sleeve. An annular disc is fixed to the bottom of the sleeve. The gear ring is a metal gear ring, and the annular disc has magnetism.

[0012] The handle is a long handle, and a rubber sleeve is sleeved on the outer side of the handle.

[0013] Through the parallel design of a high-speed direct drive gear and a high-torque booster gear, combined with a lever to switch the power transmission path of the transmission gear, it realizes the rapid switching between two working conditions of "speed priority" and "torque priority" by a single motor, achieves the rapid loosening of bolts and overcomes large-torque bolts such as rusted bolts, improves the operation efficiency of the tool. At the same time, the setting of the gear ring and the sleeve makes the overall tool thinner, further compresses the size of the tool head, adapts to the high-torque requirements and narrow-space operation characteristics of the disassembly and assembly of oilfield pump bolts, thereby improving the use convenience of the tool. The cooperation of the lead screw and the slider makes the transmission component structure simple and reliable, and also makes the operation of the lever and the transmission gear more stable. The elastic dial can make the transmission gear jump and quickly reset, realizing rapid meshing with the direct drive gear and the booster gear, thus preventing the occurrence of gear jamming and further improving the operation reliability of the tool. The limit groove, limit edge and magnetic annular disk can facilitate users to replace sleeves of different models, realize rapid blind installation of sleeves, and adapt to the rapid switching requirements of multiple specifications of bolts in the oilfield field, further improving the use convenience of the tool. The long handle makes the tool more labor-saving when operating on relatively tight bolts, and the cooperation with the rubber sleeve can improve the anti-slip performance and grip feeling of the whole tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model can be further described by the non-limiting embodiments given in the drawings.

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] Figure 2 It is a schematic cross-sectional structural diagram of the present utility model.

[0017] Figure 3 is Figure 2 an enlarged schematic structural diagram of part A in

[0018] Figure 4 It is a schematic cross-sectional structural diagram of the bottom of the present utility model.

[0019] Housing 1, handle 2, gear ring 4, sleeve 5, lever 6, pinion 7, transmission gear 8, first sprocket 9, first chain 10, direct drive gear 11, first bevel gear 12, second bevel gear 13, booster gear 14, worm gear 15, worm 16, second sprocket 17, second chain 18, reduction motor 19, lead screw 20, small motor 21, slider 22, card slot 23, control rod 24, dial 25, limit groove 26, limit edge 27, annular disk 28, rubber sleeve 29. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to enable those skilled in the art to better understand the present utility model, the technical solutions of the present utility model will be further described below in conjunction with the drawings and embodiments.

[0021] As shown Figures 1-4 in the figure, a special tool for repairing oilfield pumps and motors includes a housing 1. A handle 2 is installed at the rear side of the housing 1. A gear ring 4 is rotatably installed at the front side inside the housing 1. A sleeve 5 is installed inside the gear ring 4. The left and right sides of the rear side of the gear ring 4 are hinged with a lever 6. A pinion 7 meshing with the gear ring 4 is rotatably installed on the front side of the lever 6. A conversion gear 8 is rotatably installed on the rear side of the lever 6. A first sprocket 9 is drivingly installed on the upper sides of both the pinion 7 and the conversion gear 8. A first chain 10 is connected between the two first sprockets 9. A switching assembly for controlling the left and right rotation of the lever 6 is installed in the middle of the housing 1;

[0022] A direct drive gear 11 matching with the conversion gear 8 is rotatably installed on the left side of the conversion gear 8. A first bevel gear 12 drivingly connected with the direct drive gear 11 is rotatably installed on the upper side of the direct drive gear 11. A second bevel gear 13 meshing with the first bevel gear 12 is rotatably installed on the side of the first bevel gear 12. A boosting gear 14 matching with the conversion gear 8 is rotatably installed on the right side of the conversion gear 8. A worm gear 15 drivingly connected with the boosting gear 14 is rotatably installed on the upper side of the boosting gear 14. A worm 16 meshing with the worm gear 15 is installed on the side of the worm gear 15. Second sprockets 17 are drivingly connected to the rear sides of both the worm 16 and the second bevel gear 13. A second chain 18 is connected between the two second sprockets 17. A reduction motor 19 is installed on the rear side of the housing 1. The output end of the reduction motor 19 is drivingly connected with one of the second sprockets 17.

[0023] The reduction motor 19 is a publicly available technology and can amplify torque while rotating. When the present utility model is in use, the reduction motor 19 enables the second bevel gear 13 and the worm 16 to rotate synchronously through the second sprocket 17 and the second chain 18, and enables the boosting gear 14 and the direct drive gear 11 to rotate synchronously through the worm gear 15 and the first bevel gear 12. Moreover, the direct drive gear 11 and the boosting gear 14 rotate in the same direction. When using this tool, the sleeve 5 is sleeved on the upper side of the bolt to be disassembled and assembled. When small torque operation is required, the switching assembly controls the conversion gear 8 to engage with the direct drive gear 11, and at this time, the bolt can be quickly screwed. When large torque operation is required, the switching assembly controls the conversion gear 8 to engage with the boosting gear 14. Since the worm gear 15 and the worm 16 have the function of amplifying torque, the bolt can be strongly screwed.

[0024] Through the parallel design of the high-speed direct drive gear 11 and the high-torque boosting gear 14, combined with the lever switching the power transmission path of the conversion gear 8, the rapid switching between the two working conditions of "speed priority" and "torque priority" by a single motor is realized, the rapid loosening of bolts and the overcoming of large-torque bolts such as rusty bolts are achieved, and the operation efficiency of the tool is improved. At the same time, the setting of the gear ring 4 and the sleeve 5 makes the overall tool thinner, further compresses the size of the tool head, adapts to the high-torque requirements and the narrow space operation characteristics of the disassembly and assembly of oilfield pump bolts, thereby improving the convenience of using the tool.

[0025] The switching component includes a lead screw 20 rotatably connected to the housing 1. A small motor 21 is fixed to the side of the housing 1, and the output end of the small motor 21 is drivingly connected to the lead screw 20. A slider 22 is threadedly connected to the middle of the lead screw 20. A clamping groove 23 is formed on the upper side of the slider 22. A control rod 24 is rotatably installed on the upper side of the shift lever 6. A dial 25 is fixed to the upper side of the control rod 24, and the front side of the dial 25 is slidably connected to the clamping groove 23 in the front and back directions.

[0026] When the small motor 21 rotates, the lead screw 20 can drive the slider 22 to move left and right. Thus, the dial 25 and the control rod 24 can drive the shift lever 6 to rotate left and right to realize the left and right switching of the position of the conversion gear 8.

[0027] Due to the one-way locking characteristic of the lead screw 20, the cooperation between the lead screw 20 and the slider 22 not only makes the structure of the transmission component simple and reliable, but also makes the operation of the shift lever 6 and the conversion gear 8 more stable.

[0028] The dial 25 is an elastic piece.

[0029] When the conversion gear 8 conflicts with other gears during position switching, the elastic dial 25 can make the conversion gear 8 jump and quickly reset, realizing quick meshing with the direct drive gear 11 and the boosting gear 14, thereby preventing the occurrence of gear jamming and further improving the operation reliability of the tool.

[0030] A plurality of limiting grooves 26 are evenly formed inside the gear ring 4. The number of sleeves 5 is multiple, and a plurality of limiting ridges 27 matching the limiting clamping grooves 23 are arranged on the outer side of the sleeves 5. An annular disc 28 is fixed to the bottom of the sleeves 5. The gear ring 4 is a metal gear ring 4, and the annular disc 28 has magnetism.

[0031] The handle 2 is a long handle 2, and a rubber sleeve 29 is sleeved on the outer side of the handle 2.

[0032] A plurality of sleeves 5 can correspond to different nut models. The limiting grooves 26, the limiting ridges 27 and the magnetic annular disc 28 can facilitate users to replace different models of sleeves 5, realize quick blind installation of the sleeves 5, and meet the quick switching requirements of multiple specifications of bolts in the oil field site, further improving the use convenience of the tool. The long handle 2 makes the tool more labor-saving when operating on relatively tight bolts, and the cooperation with the rubber sleeve 29 can improve the overall anti-slip performance and holding feeling of the tool.

[0033] The above embodiments only exemplarily illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A special tool for repairing oilfield pumps and motors, including a housing, and a handle is installed at the rear side of the housing, and is characterized in that: A ring gear is rotatably installed on the front side inside the housing. A sleeve is installed inside the ring gear. On the left and right of the rear side of the ring gear, there are articulated lever rods. A pinion gear meshing with the ring gear is rotatably installed on the front side of the lever rod. A conversion gear is rotatably installed on the rear side of the lever rod. A first sprocket is installed on the upper sides of both the pinion gear and the conversion gear. A first chain is connected between the two first sprockets. A switching assembly for controlling the left and right rotation of the lever rod is installed in the middle of the housing; A direct drive gear matching with the conversion gear is rotatably installed on the left side of the conversion gear. A first bevel gear drivingly connected with the direct drive gear is rotatably installed on the upper side of the direct drive gear. A second bevel gear meshing with the first bevel gear is rotatably installed on the side of the first bevel gear. A boosting gear matching with the conversion gear is rotatably installed on the right side of the conversion gear. A worm gear drivingly connected with the boosting gear is rotatably installed on the upper side of the boosting gear. A worm meshing with the worm gear is installed on the side of the worm gear. The rear sides of both the worm and the second bevel gear are drivingly connected with a second sprocket. A second chain is connected between the two second sprockets. A reduction motor is installed on the rear side of the housing. The output end of the reduction motor is drivingly connected with one of the second sprockets.

2. The special tool for repairing oilfield pumps according to claim 1, wherein: The switching assembly includes a lead screw rotatably connected with the housing. A small motor is fixed on the side of the housing. The output end of the small motor is drivingly connected with the lead screw. A slider is threadedly connected to the middle of the lead screw. A card slot is formed on the upper side of the slider. A control rod is rotatably installed on the upper side of the lever rod. A dial is fixed on the upper side of the control rod. The front side of the dial is slidably connected to the card slot in the front and rear directions.

3. The special tool for repairing oilfield pumps according to claim 2, characterized in that: The dial is an elastic sheet.

4. The special tool for repairing oilfield pumps according to claim 3, characterized in that: Limiting grooves are evenly formed inside the ring gear. The number of sleeves is multiple, and multiple limiting edges matching with the limiting card slots are arranged on the outer side of the sleeve. An annular disc is fixed at the bottom of the sleeve. The ring gear is a metal ring gear, and the annular disc has magnetism.

5. A special tool for repairing oilfield pumps according to claim 4, characterized in that: The handle is a long handle, and a rubber sleeve is sleeved on the outer side of the handle.

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