CN109577895B - Gear and rack transmission type rotary locking mechanism - Google Patents
Gear and rack transmission type rotary locking mechanism Download PDFInfo
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- CN109577895B CN109577895B CN201811430926.9A CN201811430926A CN109577895B CN 109577895 B CN109577895 B CN 109577895B CN 201811430926 A CN201811430926 A CN 201811430926A CN 109577895 B CN109577895 B CN 109577895B
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- 230000005540 biological transmission Effects 0.000 title abstract description 7
- 230000001788 irregular Effects 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 239000003921 oil Substances 0.000 description 65
- 239000010720 hydraulic oil Substances 0.000 description 14
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000002332 oil field water Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/02—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
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Abstract
The invention relates to a rack and pinion transmission rotary locking mechanism, which comprises a movable beam, a rotary locking mechanism central shaft and a delivery outer layer pipe locking groove inserted in the rotary locking mechanism central shaft, wherein the rotary locking mechanism central shaft is symmetrically provided with arc locking blocks for locking/loosening the delivery outer layer pipe locking groove; the electromagnetic reversing control system of the rack cylinder comprises a ground hydraulic pump station, an oil filter, a three-position four-way electromagnetic reversing valve, a hydraulic lock and the rack cylinder. The invention applies the electro-hydraulic control principle to the gear rack rotation locking mechanism of the pressurized delivery device, reduces the labor intensity of operators, improves the production efficiency and improves the precision of manual operation control.
Description
Technical Field
The invention relates to a rotary locking mechanism of a pressurized delivery device of an oil field water injection well, in particular to a rotary locking mechanism driven by a gear and a rack.
Background
The oil field water injection well under-pressure delivery device generally delivers an oil pipe packer to a preset position inside a production pipe column to realize setting, isolates an internal pressure channel of the production pipe column, and performs normal acidification operation after the internal plugging of the production pipe column is realized. The first premise of delivery under pressure is that after the rotary locking mechanism of the delivery device under pressure is safely locked with the locking groove of the delivery outer-layer pipe, the oil pipe packer is delivered to the interior of the production pipe column by strokes through the two-stage hydraulic cylinder.
The rotary locking mechanism of the pressurized delivery device usually needs to be provided with a scaffold, an operator stands at a wellhead to stir a manual rotary rod to rotate the outer contour circumferential surface of the rotary cover, so that the inner contour arc surface is driven to rotate, the outer contour arc surfaces of the two arc locking blocks are extruded to reciprocate in the inner direction and the outer direction, and therefore the locking grooves of the delivery outer layer pipe are tightly held/loosened, and the locking/loosening function of the delivery outer layer pipe is realized. But the defects of low manual control precision, high manual strength, high danger coefficient and the like of operators exist.
Therefore, based on the problems, the gear and rack transmission rotary locking mechanism applies the electro-hydraulic control principle to the gear and rack rotary locking mechanism of the pressurized delivery device, reduces the labor intensity of an operator, improves the production efficiency, improves the precision of manual operation control, and has important practical significance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the gear and rack transmission rotary locking mechanism which applies the electro-hydraulic control principle to the gear and rack rotary locking mechanism of the pressurized delivery device, reduces the labor intensity of an operator, improves the production efficiency and improves the precision of manual operation control.
The invention is realized by adopting the following technical scheme:
a rotary locking mechanism driven by a gear rack comprises a gear rack rotary locking mechanism and an electromagnetic reversing control system of a rack cylinder, wherein the gear rack rotary locking mechanism comprises a moving beam, a rotary locking mechanism central shaft and a delivery outer-layer pipe locking groove inserted in the rotary locking mechanism central shaft, circular-arc locking blocks used for locking/unlocking the delivery outer-layer pipe locking groove are symmetrically assembled on the rotary locking mechanism central shaft, a rotary cover used for driving the two circular-arc locking blocks to do linear reciprocating motion is further rotatably arranged on the rotary locking mechanism central shaft, and the rack cylinder used for driving the rotary cover to rotate clockwise/anticlockwise is arranged at the lower end of the moving beam;
the electromagnetic reversing control system of the rack cylinder comprises a ground hydraulic pump station, an oil filter, a three-position four-way electromagnetic reversing valve, a hydraulic lock and the rack cylinder.
Preferably, the walking beam is arranged at the upper end of the rack cylinder and is perpendicular to the central shaft of the rack cylinder, the outer part of the walking beam is welded with the rack cylinder in a combined mode, and the inner part of the walking beam is communicated with the inner part of the rack cylinder.
Preferably, the rotary locking central shaft is of a hollow structure, a hollow through hole is used for the delivery outer layer pipe to pass through, the delivery outer layer pipe is provided with at least two delivery outer layer pipe locking grooves along the axial direction of the delivery outer layer pipe, and the delivery outer layer pipe locking grooves are provided with outer chamfers.
Further preferably, the rear end of the rotary locking central shaft is carved with an external thread which is connected with an internal thread inside the upper screw cap through a thread and is fixedly assembled in the through hole of the movable beam, the left side and the right side of the front part of the rotary locking central shaft are respectively symmetrically provided with a through arc surface opening, the two arc locking blocks are respectively placed in the two arc surface openings, a spring groove is arranged on the end surface of the opening of the arc surface of the rotary locking central shaft, which is close to the arc locking block, two sides of the arc locking block are respectively provided with a spring pin which is arranged at a spring groove of a central shaft of the rotary locking mechanism, so that the circular arc locking block and the central shaft of the rotary locking mechanism are assembled together, the outer contour of the circular arc locking block is an irregular circular arc surface, the inner contour is a central semicircle, and a step chamfer matched with the outer chamfer of the delivery outer layer pipe locking groove is arranged on the inner contour arc surface of the central semicircle.
Preferably, a through driving groove with an irregular arc-shaped inner contour is formed in the rotary cover, the rotary cover is rotatably sleeved on the rotary locking central shaft and is also positioned in the movable beam, and the outer contour arc surfaces of the two arc locking blocks are respectively and tightly attached to the inner contour arc surface of the driving groove of the rotary cover, so that the two arc locking blocks are subjected to the rotary extrusion action of the inner contour arc surface of the driving groove to perform linear reciprocating motion.
Preferably, the circumference of the outer contour of the rotary cover is in a shape of a semicircular gear, the circumference of the lower semicircle of the outer contour of the rotary cover is provided with teeth, the circumference of the upper semicircle is provided with no teeth, and the teeth on the circumference of the lower semicircle of the rotary cover extend into the rack cylinder and are meshed with the rack in the rack cylinder.
Further preferably, the rack cylinder includes a rack cylinder body, end covers disposed at two ends of the rack cylinder body, and a cavity, a piston rod and a rack disposed in the rack cylinder body, the piston includes a first piston and a second piston symmetrically disposed at two sides of the rack cylinder body, the first piston and the second piston are respectively enclosed between the end covers close to the first piston and the second piston to form a first cavity and a second cavity, one side of the first piston opposite to the second piston is respectively provided with a piston rod, the two piston rods are connected with each other through the rack, and the piston rod and the rack are respectively disposed coaxially with the rack cylinder body.
Further preferably, ground hydraulic power unit includes hydro-cylinder, hydraulic pump, ground hydraulic power unit motor, overflow valve, the oil feed end of hydraulic pump passes through the oil circuit and links to each other with the hydro-cylinder, ground hydraulic power unit motor is used for driving the hydraulic pump operation, the end of producing oil of hydraulic pump passes through the oil circuit and links to each other with the oil filter, the oil filter passes through the oil circuit and links to each other with three-position four-way electromagnetic directional valve, three-position four-way electromagnetic directional valve passes through the oil circuit and links to each other with the hydraulic pressure lock, the hydraulic pressure lock passes through the oil circuit and links to each other with the rack jar, is located oil circuit between hydraulic pump and the oil filter links to each other through the oil feed end that returns oil circuit.
The invention has the advantages and positive effects that:
1. the dual-stage hydraulic cylinder is reasonable in structure, safe, reliable and easy to operate, and after the dual-stage hydraulic cylinder is locked, the dual-stage hydraulic cylinder can conveniently deliver the oil pipe packer to a preset position in a production pipe column in a stroke-by-stroke mode to realize setting, so that the safe and smooth acidizing construction of the whole under-pressure delivery device is ensured.
2. The electro-hydraulic control system of the gear rack rotation locking mechanism of the pressurized delivery device is realized by applying an electro-hydraulic control principle to the gear rack rotation locking mechanism of the pressurized delivery device.
3. The invention improves the control performance of the gear rack rotation locking mechanism of the pressurized delivery device, lightens the labor intensity of operators, improves the production efficiency, improves the precision of manual operation control and has higher reliability.
4. In the invention, when the three-position four-way electromagnetic directional valve is positioned at the middle position, the hydraulic lock is in a closed state, the oil path is blocked, the bidirectional locking function of the rack cylinder is realized, the rack cylinder is ensured to be accurately positioned and stopped, the locking is reliable and lasting, and the safety protection effect on the belt pressure delivery device is realized.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic structural view of a rack and pinion rotary locking mechanism of the present invention;
FIG. 3 is a schematic structural view of the rotational locking mechanism of the present invention in a state where the central shaft is assembled with the upper cap;
FIG. 4 is a front view of the spin cover of the present invention;
FIG. 5 is a schematic structural diagram of the rotary locking mechanism of the present invention in a front view with the central shaft assembled with the circular locking block;
FIG. 6 is a schematic structural view of the rotary cap, the delivery outer pipe locking groove, the arc locking block and the central shaft of the rotary locking mechanism in the assembled state;
FIG. 7 is a schematic longitudinal cross-sectional view of the structure of FIG. 6;
fig. 8 is a structural view illustrating a clockwise rotation state of the rotary cap in fig. 7;
FIG. 9 is a schematic top view of the outer tube of the present invention;
FIG. 10 is a schematic diagram showing the connection of the rack cylinder, the three-position four-way solenoid directional valve, and the hydraulic lock when the three-position four-way solenoid directional valve is in the left position in the present invention;
FIG. 11 is a schematic diagram showing the connection of the rack cylinder, the three-position four-way solenoid directional valve and the hydraulic lock when the three-position four-way solenoid directional valve is in the neutral position;
FIG. 12 is a schematic diagram showing the connection of the rack cylinder, the three-position four-way solenoid directional valve, and the hydraulic lock when the three-position four-way solenoid directional valve is in the right position according to the present invention;
fig. 13 is a schematic view showing the structure of the traveling beam, the central shaft of the rotational lock mechanism, the upper screw cap, and the outer delivery pipe according to the present invention in an assembled state.
In the figure: 1. the hydraulic pump comprises a rack cylinder, 2 rack cylinder bodies, 3 end covers, 4 chambers, 4a first chamber, 4b second chambers, 5 pistons, 5a first pistons, 5b second pistons, 6 piston rods, 7 racks, 8 moving beams, 9 rotating covers, 10 rotating locking mechanism central shafts, 11 arc locking blocks, 12 spring pins, 13 delivery outer pipe locking grooves, 14 ground hydraulic pump stations, 15 oil filters, 16 three-position four-way electromagnetic reversing valves, 17 hydraulic locks, 18 oil passages, 19 delivery outer pipes, 20 outer chamfers, 21 upper rotating covers, 22 arc surface openings, 23 spring grooves, 24 driving grooves, 25 oil cylinders, 26 hydraulic pumps, 27 ground hydraulic pump stations motors, 28 overflow valves and 29 return oil passages.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1-13, a rack-and-pinion transmission rotary locking mechanism comprises a rack-and-pinion rotary locking mechanism and an electromagnetic reversing control system of a rack cylinder, wherein the rack-and-pinion rotary locking mechanism comprises a movable beam 8, a rotary locking mechanism central shaft 10, and a delivery outer-layer pipe locking groove 13 inserted into the rotary locking mechanism central shaft 10, circular-arc locking blocks 11 for locking/unlocking the delivery outer-layer pipe locking groove 13 are symmetrically assembled on the rotary locking mechanism central shaft 10, a rotary cover 9 for driving the two circular-arc locking blocks 11 to linearly reciprocate is further rotatably arranged on the rotary locking mechanism central shaft 10, and the rack cylinder 1 for driving the rotary cover 9 to rotate clockwise/counterclockwise is arranged at the lower end of the movable beam 8; the electromagnetic reversing control system of the rack cylinder 1 comprises a ground hydraulic pump station 14, an oil filter 15, a three-position four-way electromagnetic reversing valve 16, a hydraulic lock 17 and the rack cylinder 1.
As shown in figure 1, the delivery outer layer pipe locking groove 13 is inserted into a central shaft 10 of a rotary locking mechanism, two circular arc locking blocks 11 are symmetrically assembled on the central shaft 10 of the rotary locking mechanism, a rack cylinder 1 is used for driving a rotary cover 9 to rotate clockwise/anticlockwise to drive an inner contour circular arc surface of a driving groove 24 to rotate, and then the outer contour circular arc surfaces of the two circular arc locking blocks 11 are extruded to generate linear reciprocating motion in inner and outer directions, so that the two circular arc locking blocks 11 tightly hold/release the delivery outer layer pipe locking groove 13, and finally the locking/releasing function of the delivery outer layer pipe 19 is realized. The dual-stage hydraulic cylinder is convenient to deliver the oil pipe packer to a preset position inside a production pipe column in a stroke-divided manner and then realize setting, safe and smooth acidizing construction of the whole under-pressure delivery device is guaranteed, compared with manual rotation locking used in the past, the labor intensity of an operator is greatly reduced, the production efficiency is improved, the precision of manual operation control is improved, and the reliability is higher.
Further, it is also considered in the present invention that the movable beam 8 is disposed at the upper end of the rack cylinder 1, is disposed perpendicular to the central axis of the rack cylinder 1, is formed by combining and welding the outer portion thereof with the rack cylinder 1, and is communicated with the inner portion of the rack cylinder 1.
Further, it is also considered in the present invention that the rotation locking center shaft 10 has a hollow structure in which a hollow hole is formed for the delivery outer tube 19 to pass through, the delivery outer tube 19 is provided with at least two delivery outer tube locking grooves 13 along an axial direction thereof, and the delivery outer tube locking grooves 13 are provided with outer chamfers 20. As shown in fig. 9, the outer tube feeding locking groove 13 is formed in the outer tube feeding tube 19, so that the outer tube feeding locking groove 13 is prevented from being easily removed and released when the circular arc locking block 11 tightly holds the outer tube feeding locking groove 13.
Furthermore, it can be considered in the present invention that an external thread is engraved at the rear end of the rotational locking central shaft 10, the external thread is connected with an internal thread inside the upper screw cap 21 through a thread and is fixedly assembled in the through hole of the movable beam 8, the left and right sides of the front portion of the rotational locking central shaft 10 are respectively symmetrically provided with a through arc surface opening 22, the two arc locking blocks 11 are respectively placed in the two arc surface openings 22, the end surface of the arc surface opening 22 of the rotational locking central shaft 10, which is close to the arc locking blocks 11, is provided with a spring groove 23, the two sides of the arc locking blocks 11 are respectively provided with a spring pin 12, the spring pin 12 is placed in the spring groove 23 of the rotational locking mechanism central shaft 10, so that the arc locking blocks 11 and the rotational locking mechanism central shaft 10 are assembled together, as shown in fig. 3, 5 and 6, when the two arc locking blocks 11 are linearly moved inward, namely, the two arc locking blocks 11 move inwards along the radial direction of the rotary locking central shaft 10, the spring force in the spring pin 12 is overcome, the two arc locking blocks 11 tightly hold the locking groove 13 of the delivery outer layer pipe to realize the locking function, and then the movable beam 8 is connected with the delivery outer layer pipe 19; when the external force acting on the two arc locking blocks 11 disappears, the arc locking blocks 11 linearly move outwards under the action of the resilience of the spring in the spring pin 12, namely the two arc locking blocks 11 both move outwards along the radial direction of the rotary locking central shaft 10, and the two arc locking blocks 11 are far away from the position of the feeding outer-layer pipe locking groove 13 to realize the loosening function. The outer contour of the circular arc locking block 11 is an irregular circular arc surface, the inner contour is a central semicircle, and a step chamfer matched with the outer chamfer of the delivery outer layer pipe locking groove 13 is arranged on the inner contour circular arc surface of the central semicircle. Wherein, the step chamfer is matched with the outer chamfer 20 of the delivery outer layer pipe locking groove 13 to prevent the pipe from being easily retreated from the groove, loosened and slipped off.
Further, it is also considered in the present invention that a through driving slot 24 with an irregular circular arc inner contour is formed in the rotating cover 9, the rotating cover 9 is rotatably sleeved on the rotating locking central shaft 10 and is also located in the moving beam 8, and the outer contour arc surfaces of the two circular arc locking blocks 11 are respectively tightly attached to the inner contour arc surfaces of the driving slot 24 of the rotating cover 9, so that the two circular arc locking blocks 11 are linearly reciprocated, i.e. reciprocated in both the inner and outer directions, by the rotating extrusion of the inner contour arc surfaces of the driving slot 24. As shown in fig. 6, 7 and 8, the rotary cover 9 is rotatably sleeved on the rotary locking central shaft 10, the delivery outer layer tube 19 is inserted into the rotary locking central shaft 10, the outer contour arc surfaces of the two arc locking blocks 11 are respectively and tightly attached to the inner contour arc surfaces of the driving grooves 24 of the rotary cover 9, when the rotary cover 9 rotates clockwise/counterclockwise on the rotary locking central shaft 10, the inner contour arc surfaces of the driving grooves 24 rotate along with the outer contour arc surfaces, and then the outer contour arc surfaces of the two arc locking blocks 11 are extruded to reciprocate in the inner direction and the outer direction, so that the delivery outer layer tube locking grooves 13 are tightly held/released, and the locking/releasing function of the delivery outer layer tube 19 is realized.
Further, it is also considered in the present invention that the outer contour circumference of the rotating cover 9 is in a shape of a half-round gear, the lower half-round circumference of the outer contour of the rotating cover 9 is provided with teeth, the upper half-round circumference is provided with no teeth, and the teeth on the lower half-round circumference of the rotating cover 9 extend into the rack cylinder 1 and are engaged with the rack 7 in the rack cylinder 1. As shown in fig. 2-8, according to the principle of gear and rack engagement, the thrust of the rack cylinder 1 is converted into the output torque of the outer circumference of the rotary cover 9, which drives the inner circumference arc surface of the driving groove 24 to rotate, and the outer circumference arc surfaces of the two arc locking blocks 11 are extruded to reciprocate in the inner and outer directions, so as to clasp/loosen the locking groove 13 of the delivery outer pipe, and realize the locking/loosening function of the delivery outer pipe 19.
Further, it is also considered in the present invention that the rack cylinder 1 includes a rack cylinder 2, end caps 3 disposed at two ends of the rack cylinder 2, and a chamber 4 disposed in the rack cylinder 2, a piston 5, a piston rod 6, and a rack, where the piston 5 includes a first piston 5a and a second piston 5b symmetrically disposed at two sides in the rack cylinder 2, the first piston 5a and the second piston 5b enclose a first chamber 4a and a second chamber 4b with the end caps close to the first piston 5a and the second piston 5b, the opposite sides of the first piston 5a and the second piston 5b are respectively provided with a piston rod 6, the two piston rods 6 are connected with each other through the rack 7, and the piston rod 6 and the rack 7 are respectively disposed coaxially with the rack cylinder 2. As shown in fig. 1 and 2, when hydraulic oil enters the second chamber 4b and the hydraulic oil in the first chamber 4a is discharged, the hydraulic oil in the second chamber 4b pushes the second piston 5b leftward to drive the rack 7 to move leftward, and due to the rack-and-pinion meshing principle, the gear on the lower semicircular circumferential surface of the outer contour of the rotating cover 9 is driven to rotate clockwise, so that the circular arc surface of the inner contour of the driving groove 24 rotates clockwise, the circular arc surfaces of the outer contours of the two circular arc locking blocks 11 are extruded to perform linear motion in the inward direction, and the two circular arc locking blocks 11 tightly hold the outer-layer pipe locking groove 13 to realize a locking function; when hydraulic oil enters the first chamber 4a and hydraulic oil in the second chamber 4b is discharged, the hydraulic oil entering the first chamber 4a pushes the first piston 5a rightwards to drive the rack 7 to move rightwards, the gear of the lower semicircular circumferential surface of the outer contour of the rotary cover 9 is driven to rotate anticlockwise due to the gear-rack meshing principle, then the circular arc surface of the inner contour of the driving groove 24 is driven to rotate anticlockwise, the extrusion of the outer contour of the circular arc locking block 11 acted by the inner contour of the driving groove 24 disappears, the circular arc locking block 11 linearly moves outwards under the rebound action of the spring in the spring pin 12, the two circular arc locking blocks 11 are far away from the delivery outer pipe locking groove 13 to realize the loosening function, the thrust of the rack cylinder 1 is converted into the output torque of the outer circumferential surface of the rotary cover 9 according to the gear-rack meshing principle, then the circular arc surfaces of the outer contours of the two circular arc locking blocks 11 are extruded to reciprocate in the inner, thereby achieving the locking/unlocking function of the delivery outer tube 19.
Further, it is also considered in the present invention that the ground hydraulic pump station includes an oil cylinder 25, a hydraulic pump 26, a ground hydraulic pump station motor 27, and an overflow valve 28, an oil inlet end of the hydraulic pump 26 is connected to the oil cylinder 25 through an oil passage 18, the ground hydraulic pump station motor 27 is configured to drive the hydraulic pump 26 to operate, an oil outlet end of the hydraulic pump 26 is connected to the oil filter 15 through the oil passage 18, the oil filter 15 is connected to the three-position four-way electromagnetic directional valve 16 through the oil passage 18, the three-position four-way electromagnetic directional valve 16 is connected to the hydraulic lock 17 through the oil passage 18, the hydraulic lock 17 is connected to the rack cylinder 1 through the oil passage 18, the oil passage 18 between the hydraulic pump 16 and the oil filter 15 is connected to an oil inlet end of the overflow valve 28 through a return oil passage 29, and an oil outlet end. As shown in fig. 1, a ground hydraulic pump station motor 27 drives the internal structure of a hydraulic pump 26 to operate, oil is supplied from an oil cylinder 25 and conveyed into an oil filter 15, the hydraulic oil filtered by the oil filter 15 enters a cavity of a rack cylinder 1 through a main valve port of a three-position four-way electromagnetic directional valve 16 and a hydraulic lock 17 to complete oil inlet and oil return, a complete oil path is formed, so that a piston 5 of the rack cylinder 1 is pushed to reciprocate, a rack 7 is driven to reciprocate in the same direction, the forward and reverse rotation of the lower semicircular circumferential surface of the outer contour of a rotary cover 9 is converted according to the gear and rack meshing principle, the thrust of the rack cylinder 1 is converted into the output torque of the outer circumferential surface of the outer contour of the rotary cover 9, the inner circular arc surface of a driving groove 24 is driven to rotate, the outer circular arc surfaces of two circular arc locking blocks 11 are extruded, the locking/unlocking function of the delivery outer layer pipe 19 is realized; meanwhile, the rack cylinder is controlled through the electromagnetic directional valve to realize effective control on the rotating locking mechanism, the two-stage hydraulic cylinder is convenient to deliver the oil pipe packer to a preset position in a production pipe column in a stroke-divided mode and then realize setting, and safe and smooth acidizing construction of the whole pressurized delivery device is guaranteed. It should be noted that, when the electromagnetic reversing control system of the rack cylinder 1 normally works, the overflow valve 28 is closed, and once the load exceeds the liquid pressure in the hydraulic system, the overflow valve 28 is opened, so that the redundant hydraulic oil overflows back to the oil cylinder 25, and the safety overload protection function is achieved.
The working principle is as follows:
1. locking function: as shown in fig. 10, A, B, P, T is a valve port, a and B are electromagnets, when the left electromagnet a of the three-position four-way electromagnetic directional valve 16 is energized and the left position of the three-position four-way electromagnetic directional valve 16 is connected, the oil inlet P is communicated with the oil port B, the oil port a is communicated with the oil return port T through a hole in the middle of the valve core, hydraulic oil enters the second chamber 4B of the rack cylinder 1 through the hydraulic lock 17 along the oil path, wherein, two groups of hydraulic control one-way valves in the hydraulic lock 17 act like a common one-way valve, hydraulic oil can freely pass through, the hydraulic oil entering the second chamber 4B pushes the second piston 5B leftward to drive the rack 7 to move leftward, and due to the rack-and-pinion meshing principle, the gear on the lower semicircular circumferential surface of the rotary cover 9 is driven to rotate clockwise, so that the circular arc surface of the inner contour of the driving groove 24 rotates clockwise, and the circular arc surfaces of the two, that is, the two circular arc locking blocks 11 move inwards along the radial direction of the rotary locking central shaft 10, at the moment, the spring force in the spring pin 12 is overcome, the two circular arc locking blocks 11 tightly hold the locking groove 13 of the delivery outer layer pipe to realize the locking function, so that the movable beam 8 is connected with the delivery outer layer pipe 19, and the oil pipe packer is delivered to the preset position in the production pipe column in a stroke-by-stroke manner through the two-stage hydraulic cylinder.
2. The locking function is maintained; as shown in fig. 11, after the arc locking block locks the outer pipe locking groove 13, the left electromagnets a and b of the three-position four-way electromagnetic directional valve 16 are powered off, when the three-position four-way electromagnetic directional valve 16 is closed, the main valve core of the electromagnetic directional valve is located at the middle position under the action of the spring, as long as the main valve core of the electromagnetic proportional valve is located at the middle position, the main valve core does not move to the left or right position (unless being controlled by human beings), the hydraulic lock 17 is in the closed state, no oil returns and no oil path exists in the oil path, so that the first piston 5a and the second piston 5b in the rack cylinder 1 do not move, that is, the hydraulic lock 17 in the oil path ensures that the rack cylinder 1 (rack and pinion hydraulic cylinder) is locked bidirectionally when the three-position four-way electromagnetic directional valve 16 is located at the middle position, the position of the rack 7 remains unchanged, thereby ensuring that, And after the arc locking block 11 is safely locked and delivered to the outer pipe locking groove 13, the dual-stage hydraulic cylinder is convenient to deliver the oil pipe packer to a preset position in the production pipe column in a stroke-by-stroke manner to realize setting, so that the safe and smooth acidizing construction of the whole pressurized delivery device is ensured.
3. Loosening function: as shown in fig. 12, when the right electromagnet B of the three-position four-way electromagnetic directional valve 16 is energized and the right position of the three-position four-way electromagnetic directional valve 16 is connected, the oil inlet P is communicated with the oil port a, and the oil port B is communicated with the oil return port T through a hole in the middle of the valve core. Hydraulic oil enters the first chamber 4a of the rack cylinder 1 through the hydraulic lock 17 along an oil path, two groups of hydraulic control one-way valves in the hydraulic lock 17 act like common one-way valves, the hydraulic oil can freely pass through, the hydraulic oil entering the first chamber 4a pushes the first piston 5a to the right to drive the rack 7 to move to the right, due to the meshing principle of the gear and the rack, the gear on the lower semicircular circumferential surface of the outer contour of the rotary cover 9 is driven to rotate anticlockwise, then the circular arc surface of the inner contour of the driving groove 24 is driven to rotate anticlockwise, the extrusion of the inner contour of the driving groove 24 acting on the outer contour of the circular locking block 11 disappears, under the action of the spring resilience in the spring pin 12, the arc locking block 11 linearly moves outwards, namely, the two arc locking blocks 11 move outwards along the radial direction of the rotary locking central shaft 10, and the two arc locking blocks 11 are far away from the position of the locking groove 13 of the delivery outer-layer pipe to realize the loosening function.
In conclusion, the invention provides the gear-rack transmission rotary locking mechanism which applies the electro-hydraulic control principle to the gear-rack rotary locking mechanism of the pressurized delivery device, reduces the labor intensity of operators, improves the production efficiency and improves the precision of manual operation control.
Claims (6)
1. The utility model provides a rack and pinion driven rotation locking mechanism which characterized in that: the electromagnetic reversing control system comprises a gear rack rotary locking mechanism and a rack cylinder, wherein the gear rack rotary locking mechanism comprises a movable beam, a rotary locking mechanism central shaft and a delivery outer layer pipe locking groove inserted in the rotary locking mechanism central shaft, circular arc locking blocks used for locking/unlocking the delivery outer layer pipe locking groove are symmetrically assembled on the rotary locking mechanism central shaft, a rotary cover used for driving the two circular arc locking blocks to do linear reciprocating motion is further rotatably arranged on the rotary locking mechanism central shaft, and the rack cylinder used for driving the rotary cover to rotate clockwise/anticlockwise is arranged at the lower end of the movable beam;
the electromagnetic reversing control system of the rack cylinder comprises a ground hydraulic pump station, an oil filter, a three-position four-way electromagnetic reversing valve, a hydraulic lock and the rack cylinder;
the rotary locking central shaft is of a hollow structure, a hollow through hole is used for a delivery outer layer pipe to pass through, the delivery outer layer pipe is provided with at least two delivery outer layer pipe locking grooves along the axial direction of the delivery outer layer pipe, and the delivery outer layer pipe locking grooves are provided with outer chamfers;
the rear end of the rotary locking central shaft is carved with an external thread which is connected with the internal thread of the upper screw cap through a thread and is fixedly assembled in the through hole of the movable beam, the left side and the right side of the front part of the rotary locking central shaft are respectively symmetrically provided with a through arc surface opening, the two arc locking blocks are respectively placed in the two arc surface openings, a spring groove is arranged on the end surface of the opening of the arc surface of the rotary locking central shaft, which is close to the arc locking block, two sides of the arc locking block are respectively provided with a spring pin which is arranged at a spring groove of a central shaft of the rotary locking mechanism, so that the circular arc locking block and the central shaft of the rotary locking mechanism are assembled together, the outer contour of the circular arc locking block is an irregular circular arc surface, the inner contour is a central semicircle, and a step chamfer matched with the outer chamfer of the delivery outer layer pipe locking groove is arranged on the inner contour arc surface of the central semicircle.
2. A rack and pinion drive rotational locking mechanism as claimed in claim 1, wherein: the movable beam is arranged at the upper end of the rack cylinder and is perpendicular to the central shaft of the rack cylinder, the outer part of the movable beam is welded with the rack cylinder in a combined mode, and the inner part of the movable beam is communicated with the inner part of the rack cylinder.
3. A rack and pinion drive rotational locking mechanism as claimed in claim 1, wherein: the rotary cover is internally provided with a through driving groove with an irregular circular arc-shaped inner contour, the rotary cover is rotatably sleeved on the rotary locking central shaft and is also positioned in the movable beam, and the outer contour arc surfaces of the two arc locking blocks are respectively tightly attached to the inner contour arc surfaces of the driving groove of the rotary cover, so that the two arc locking blocks generate linear reciprocating motion under the rotary extrusion action of the inner contour arc surfaces of the driving groove.
4. A rack and pinion drive rotational locking mechanism as claimed in claim 3, wherein: the circumference of the outline of the rotary cover is in a shape of a semicircular gear, the circumference of the lower semicircle of the outline of the rotary cover is provided with teeth, the circumference of the upper semicircle is provided with no teeth, and the teeth on the circumference of the lower semicircle of the rotary cover extend into the rack cylinder and are meshed with the rack in the rack cylinder.
5. A rack and pinion drive rotational locking mechanism as claimed in claim 4, wherein: the rack cylinder comprises a rack cylinder body, end covers arranged at two ends of the rack cylinder body, a cavity, a piston rod and a rack, wherein the cavity, the piston and the rack are arranged in the rack cylinder body, the piston comprises a first piston and a second piston which are symmetrically arranged at two sides in the rack cylinder body respectively, the first piston and the second piston are respectively arranged between the first piston and the end cover close to the first piston and between the second piston and the end cover close to the first piston, the second cavity is formed in a surrounding mode, one side, opposite to the first piston and the second piston, of the first piston is respectively provided with a piston rod, the two piston.
6. A rack and pinion drive rotational locking mechanism as claimed in claim 1, wherein: ground hydraulic power unit includes hydro-cylinder, hydraulic pump, ground hydraulic power unit motor, overflow valve, the oil feed end of hydraulic pump passes through the oil circuit and links to each other with the hydro-cylinder, ground hydraulic power unit motor is used for driving the hydraulic pump operation, the end of producing oil of hydraulic pump passes through the oil circuit and links to each other with the oil filter, the oil filter passes through the oil circuit and links to each other with the tribit four-way electromagnetic directional valve, tribit four-way electromagnetic directional valve passes through the oil circuit and links to each other with the hydraulic pressure lock, the hydraulic pressure lock passes through the oil circuit and links to each other with the rack jar, is located oil circuit between hydraulic pump and the oil filter links to each other through the oil feed end that returns oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811430926.9A CN109577895B (en) | 2018-11-28 | 2018-11-28 | Gear and rack transmission type rotary locking mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811430926.9A CN109577895B (en) | 2018-11-28 | 2018-11-28 | Gear and rack transmission type rotary locking mechanism |
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| CN109577895A CN109577895A (en) | 2019-04-05 |
| CN109577895B true CN109577895B (en) | 2021-03-02 |
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| CN110716491B (en) * | 2019-11-09 | 2020-11-20 | 智客云科技(广州)股份有限公司 | PLC remote control convenient to installation |
| CN113978766B (en) * | 2021-12-03 | 2022-05-31 | 中国科学院空间应用工程与技术中心 | Locking mechanism of linear motion system |
| CN116906660B (en) * | 2023-08-10 | 2023-12-22 | 山西蚂蚁工业有限责任公司 | Pin-semicircular arc groove type heavy-load hydraulic driving head |
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| EP2971444A1 (en) * | 2013-03-15 | 2016-01-20 | Tercel IP Limited | Tool for selectively connecting or disconnecting components of a downhole workstring |
| CN103240635A (en) * | 2013-05-20 | 2013-08-14 | 云南省机械研究设计院 | Driving and transmission method for improving automatic switching milling head indexing accuracy |
| CN105951703B (en) * | 2016-05-03 | 2017-12-01 | 武汉船用机械有限责任公司 | A kind of hydraulic system of gear-rack type lifter structure |
| CN106017225B (en) * | 2016-08-04 | 2017-10-03 | 无畏警用装备有限公司 | Shield pushing handle telescopic control mechanism |
| CN207485398U (en) * | 2017-11-23 | 2018-06-12 | 中国石油集团渤海钻探工程有限公司 | A kind of with pressure deliver protects wellhead assembly |
| CN108019178B (en) * | 2017-11-23 | 2020-07-03 | 中国石油集团渤海钻探工程有限公司 | Construction method for plugging production pipe column under pressure in pipe |
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