CN113638718A - Chain reversing oil pumping unit - Google Patents
Chain reversing oil pumping unit Download PDFInfo
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- CN113638718A CN113638718A CN202111201046.6A CN202111201046A CN113638718A CN 113638718 A CN113638718 A CN 113638718A CN 202111201046 A CN202111201046 A CN 202111201046A CN 113638718 A CN113638718 A CN 113638718A
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- reversing
- chain
- assembly
- pumping unit
- balance box
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/28—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/24—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using chains or toothed belts, belts in the form of links; Chains or belts specially adapted to such gearing
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- General Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
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- Geochemistry & Mineralogy (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to the technical field of petroleum equipment, in particular to a chain reversing oil pumping unit. Comprises a frame, a lifting rope component, a single-chain transmission mechanism and a power device; the top of the frame is provided with a head sheave assembly; two ends of the lifting rope assembly are respectively connected with the sucker rod and the reversing balance box assembly; the single-chain transmission mechanism comprises an upper chain wheel, a lower chain wheel and a chain, the upper chain wheel is arranged at the upper part in the frame through a lifting rod assembly capable of being adjusted in a lifting mode, the lower chain wheel is arranged at the lower part in the frame, the upper chain wheel and the lower chain wheel are in meshing transmission through the chain, and a reversing crankshaft assembly connected with the reversing balance box assembly is arranged on the chain; the power device drives the lower chain wheel to rotate so that the chain runs to drive the reversing balance box assembly to lift. The beneficial effects are that: adopt single chain symmetrical structure to avoid appearing the atress uneven, be convenient for adjust chain length according to the demand, the chain need not to alternate the traffic direction just can drive the balance box subassembly that commutates and go up and down for the switching-over of upper and lower journey of beam-pumping unit is simple and convenient more.
Description
Technical Field
The invention relates to the technical field of petroleum equipment, in particular to a chain reversing oil pumping unit.
Background
The carbon fiber continuous sucker rod has the advantages of low density, high tensile strength, corrosion resistance and the like, the excellent performance of the carbon fiber continuous sucker rod is well verified on the aspects of deep pumping of a small pump, corrosion resistance, long service life and replacement of the small electric pump, and the economic benefit is improved. The carbon fiber sucker rod goes up and down the operation in the well, and carbon fiber sucker rod needs the switching-over when reaching upstroke and downstroke extreme position, and the switching-over of current beam-pumping unit upstroke, downstroke is generally realized through the direction of motion that changes power device, and power device frequently opens and stops the switching-over, and the energy consumption is high, and the beam-pumping unit fault rate is high, influences life to the beam-pumping unit generally adopts double chain drive, the uneven problem of atress appears easily.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a chain-reversing pumping unit, which is used for solving the problems of high energy consumption, high failure rate, short service life and uneven stress of the pumping unit in the prior art.
In order to achieve the above and other related objects, the present invention provides a chain reversing pumping unit, which comprises a frame and a lifting rope assembly, wherein a head sheave assembly is arranged at the top of the frame, a first end of the lifting rope assembly is used for connecting with a pumping rod, and a second end of the lifting rope assembly is connected with a reversing balancing box assembly which can keep balance with the pumping rod after bypassing the head sheave assembly; the chain reversing pumping unit further comprises:
the single-chain transmission mechanism comprises an upper chain wheel, a lower chain wheel and a chain, the upper chain wheel is mounted at the upper part in the rack through a lifting rod assembly capable of being adjusted in a lifting mode, the lower chain wheel is mounted at the lower part in the rack, the upper chain wheel and the lower chain wheel are in meshing transmission through the chain, and a reversing crankshaft assembly connected with the reversing balance box assembly is arranged on the chain;
the power device is arranged outside the rack, the output end of the power device extends into the rack and is connected with the lower chain wheel in a transmission mode, the power device drives the lower chain wheel to rotate so that the chain runs to drive the reversing balance box assembly to lift.
Optionally, the reversing crankshaft assembly comprises a reversing crankshaft and two reversing wheels, the reversing wheels are installed on the reversing balance box assembly, the reversing crankshaft is connected with the chain, and two ends of the reversing crankshaft are respectively in running fit with the two reversing wheels.
Optionally, a slot of a U-shaped structure is formed in one side of the reversing crankshaft, and the chain passes through the slot and is connected with the reversing crankshaft.
Optionally, the reversing balancing box assembly comprises a balancing box for placing a balancing block, a top lug of the balancing box is connected with the second end of the lifting rope assembly, a reversing seat is arranged at the bottom of the balancing box, two symmetrically distributed reversing frames are mounted on the reversing seat, and mounting grooves for supporting two reversing wheels are formed in the reversing frames; when the balance box is lifted and reversed, the chain drives the reversing wheel to switch positions between the two mounting grooves of the reversing frame through the reversing crankshaft.
Optionally, the balance box and the reversing seat are located in the frame, and the balance box and the reversing seat are provided with a centering wheel, and the centering wheel is in sliding fit with the frame and used for lifting and guiding the balance box.
Optionally, the reversing frame comprises two supporting parts, two the supporting parts are reserved with a clearance for avoiding the reversing crankshaft, the supporting parts are provided with mounting grooves, the mounting grooves are of U-shaped structures, and the opening directions of the mounting grooves face to another reversing frame.
Optionally, the balance box and the reversing seat are provided with avoidance ports for avoiding the single-chain transmission mechanism.
Optionally, the lifting rod assembly includes two lifting rods, two the lifting rod symmetric distribution is in the both sides of last sprocket, the lower extreme of lifting rod with the sprocket shaft of last sprocket is connected, the upper end of lifting rod through adjusting nut with the frame links to each other, adjusting nut is used for adjusting the height of lifting rod so that the chain tensioning.
Optionally, the head sheave assembly includes two head sheaves, the head sheave is mounted on the top of the frame through a head sheave support, and a weighing sensor is mounted between the head sheave support and the frame; the lifting rope assembly comprises two lifting ropes arranged corresponding to the head sheave, the first ends of the lifting ropes are connected with the sucker rod through rope suspenders, and the second ends of the lifting ropes are connected with the reversing balance box assembly after bypassing the head sheave corresponding to the lifting ropes.
Optionally, the chain reversing pumping unit further comprises a control cabinet, and the control cabinet is used for controlling starting and stopping of the power device, collecting data and setting the protection load of the sucker rod.
As mentioned above, the chain reversing pumping unit of the invention at least has the following beneficial effects: the single-chain symmetrical structure is adopted to avoid uneven stress, the structure is simple, the length of the chain is convenient to adjust according to requirements, the chain can drive the reversing balance box assembly to lift without changing the operation direction through the reversing crankshaft assembly, the reversing of the up stroke and the down stroke of the pumping unit is simpler and more convenient, frequent starting and stopping for reversing are not needed, the energy consumption is reduced, the fault rate of the pumping unit is reduced, and the service life is prolonged; and the weighing sensor below the head sheave support is used for setting the minimum suspension point load, so that the carbon fiber continuous sucker rod is prevented from being damaged by pressure in the lifting process.
Drawings
FIG. 1 is a side view of an embodiment of the chain commutated pumping unit of the present invention;
FIG. 2 is a side view of a frame of an embodiment of the chain commutated pumping unit of the present invention;
FIG. 3 is a side view of a single chain drive mechanism and reversing balance box assembly of an embodiment of the chain-commutated pumping unit of the present invention;
FIG. 4 is a front view of a single chain drive mechanism and a reversing balance box assembly of an embodiment of the chain-commutated pumping unit of the present invention;
FIG. 5 is a schematic view of a reversing crankshaft of an embodiment of the chain-reversing pumping unit of the present invention moving around a lower sprocket and an upper sprocket;
FIG. 6 is a schematic view of a reversing crankshaft assembly of an embodiment of the chain-commutated pumping unit of the present invention;
FIG. 7 shows a cross-sectional view A-A of FIG. 6;
FIG. 8 is a cross-sectional view taken along line B-B of FIG. 6;
FIG. 9 is a front view of a reversing balance box assembly of an embodiment of the chain-commutated pumping unit of the present invention;
FIG. 10 is a side view of a reversing surge tank assembly for an embodiment of the chain-commutated pumping unit of the present invention;
FIG. 11 is a top view of a reversing balance box assembly of an embodiment of the chain-commutated pumping unit of the present invention;
FIG. 12 is a top view of a reversing frame and a reversing seat of an embodiment of the chain-commutated pumping unit of the present invention;
FIG. 13 is a front view of a reversing frame of an embodiment of the chain-commutated pumping unit of the present invention;
FIG. 14 is a top view of a reversing frame of an embodiment of the chain-commutated pumping unit of the present invention;
FIG. 15 is a schematic view of the top sheave assembly mounted on the top of the frame of the pumping unit in accordance with an embodiment of the present invention.
Description of reference numerals
100-a frame; 101-a stand; 102-side door; 103-front door; 104-climbing a ladder; 105-an intermediate platform; 106-observation door; 107-top platform; 108-a shield; 109-a guide groove; 200-head sheave assembly; 201-head sheave; 202-head sheave support; 300-a sling assembly; 301-a lifting rope; 302-a polished rod eye; 400-reversing balancing box assembly; 401-a balancing box; 402-a balance weight; 403-a reversing seat; 404-a reversing frame; 4041-a support; 4042-mounting groove; 4043-avoiding the gap; 405-a righting wheel; 406-avoidance ports; 500-single strand drive mechanism; 501-a chain; 502-lower sprocket; 503-an upper sprocket; 504-lifting bar; 505-adjusting nut; 506-sprocket shaft; 600-a reversing crankshaft assembly; 601-a reversing wheel; 602-a reversing crankshaft; 6021-slotting; 603-a bearing assembly; 700-a power plant; 701-a motor; 702-a pulley; 703-a brake mechanism; 704-a speed reducer; 800-control cabinet.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Before describing embodiments of the present invention in detail, the present invention will be described in an application environment. The technology of the invention is mainly applied to the field of petroleum equipment, in particular to a chain reversing pumping unit. The invention solves the problems that the reversing of the upper stroke and the lower stroke of the pumping unit is inconvenient, the reversing can be realized only by frequently changing the motion direction through a power device, the fault rate of the pumping unit is high, and the service life of the pumping unit is short.
Referring to fig. 1 to 3, the present invention provides a chain-reversing pumping unit, which includes a frame 100, a lifting rope assembly 300, a single-chain transmission mechanism 500, and a power device 700. Wherein, the top of the frame 100 is provided with a head sheave assembly 200; the first end of the lifting rope assembly 300 is used for connecting with a sucker rod (not shown in the figure), the second end of the lifting rope assembly 300 bypasses the head sheave assembly 200 and then is connected with the reversing balancing box assembly 400, and the reversing balancing box assembly 400 can be balanced with the sucker rod; the single chain transmission mechanism 500 comprises an upper chain wheel 503, a lower chain wheel 502 and a chain 501, wherein the upper chain wheel 503 is mounted at the upper part in the rack 100 through a lifting rod assembly capable of being adjusted in a lifting way, the lower chain wheel 502 is mounted at the lower part in the rack 100, the upper chain wheel 503 and the lower chain wheel 502 are in meshing transmission through the chain 501, and the chain 501 is provided with a reversing crankshaft assembly 600 connected with the reversing balance box assembly 400; the power device 700 is arranged outside the rack 100, the output end of the power device 700 extends into the rack 100 and is in transmission connection with the lower chain wheel 502, the power device 700 drives the lower chain wheel 502 to rotate so that the chain 501 runs to drive the reversing balance box assembly 400 to ascend and descend, the reversing balance box assembly 400 ascends, the sucker rod descends, the reversing balance box assembly 400 descends and the sucker rod ascends.
Referring to fig. 1 and 2, in an embodiment, a base 101 is disposed at a bottom of the rack 100, and the rack 100 and the base 101 may be integrally connected by welding. The frame 100 and the housing 101 may be formed by welding section steel and plate steel for integral support and component mounting. The rack 100 is also provided with side doors 102, a front door 103, a ladder 104, a middle platform 105, a viewing door 106, a top platform 107 and a shield 108. During assembly, the reversing balance box assembly 400 enters the rack 100 from the side door 102 and the front door 103; the middle platform 105 and the top platform 107 are accessible through the ladder 104, and the operation of the head sheave assembly can be observed and inspected through the observation door 106 while the middle platform 105 is in operation, and the top platform 107 is used for inspection of the head sheave assembly 200 and top work. A lubricating oil groove is further formed in the machine frame 100 and used for lubricating moving parts such as the chain 501, the upper chain wheel assembly and the lower chain wheel 502.
Referring to fig. 1 and 2, in one embodiment, a power unit 700 is mounted on the housing 101, and the power unit 700 is used for providing power. The power device 700 comprises a motor 701, a belt wheel 702, a brake mechanism 703 and a speed reducer 704, wherein the output end of the speed reducer 704 extends into the rack and is connected with the lower chain wheel 502 so as to drive the lower chain wheel 502 to rotate, and the power device 700 is arranged outside the rack 100 to avoid interfering with the reversing of the balance box assembly. The power device 700 can adopt frequency conversion control or common control, when adopting frequency conversion control, the stepless regulation of the upper stroke speed and the lower stroke speed is respectively realized, and the stroke frequency (the stroke frequency refers to the number of times of completing a complete stroke in unit time, and one upper stroke and one lower stroke are complete strokes) is stepless regulated; when the universal control is adopted, the stepped adjustment of the stroke frequency is realized by replacing a belt wheel, a brake mechanism 703 adopts a manual-automatic integrated drum brake, the electric brake or the manual brake can be stopped at any position, a speed reducer 704 adopts an integrated box body, the box surface is not divided, the sealing performance is good, and a bearing support is arranged at the output shaft end.
Referring to fig. 1, 3 to 8, in an embodiment, the reversing crankshaft assembly 600 includes a reversing crankshaft 602 and two reversing wheels 601, the reversing wheels 601 are mounted on the reversing balance box assembly 400, the reversing crankshaft 602 is connected to the chain 501, and two ends of the reversing crankshaft 602 are respectively rotatably engaged with the two reversing wheels 601.
Further, as shown in fig. 1 and fig. 3 to fig. 8, a U-shaped slot 6021 is formed in one side of the reversing crankshaft 602, and the chain 501 passes through the slot 6021 and is connected to the reversing crankshaft 602, so that the reversing crankshaft 602 can move along with the chain 501, thereby driving the reversing balancing box assembly 400 to ascend or descend. Or, one of the chain links on the chain 501 is removed, and the removed chain link is replaced by a reversing crankshaft 602, and the reversing crankshaft 602 can be matched with the upper chain wheel 503 and the lower chain wheel 502; during assembly, after one chain link is disassembled, the chain 501 is broken, two groups of mounting hole groups are arranged on the side wall of the groove 6021 of the reversing crankshaft 602, each group of mounting hole groups comprises two mounting holes which are respectively arranged on the two side walls of the groove 6021, and the two groups of mounting hole groups are respectively connected with the two ends of the broken chain 501 through pin shafts, so that the chain 501 is closed.
Further, referring to fig. 1, 3 to 8, the lifting bar assembly comprises two lifting bars 504, the two lifting bars 504 are symmetrically distributed on both sides of the upper chain wheel 503, the lower ends of the lifting bars 504 are connected with the chain wheel shaft 506 of the upper chain wheel 503, the upper ends of the lifting bars 504 are connected with the frame 100 through adjusting nuts 505, and the adjusting nuts 505 are used for adjusting the heights of the lifting bars 504 to tension the chain 501. The upper ends of the lifting rods 504 are provided with threads, so that the upper ends of the lifting rods 504 are in threaded connection with the adjusting nuts 505, the upper chain wheel 503 is connected with the lower ends of the two lifting rods 504 which are symmetrically distributed through the chain wheel shaft 506, the upper ends of the two lifting rods 504 can penetrate through the top of the rack 100 and then are in threaded connection with the adjusting nuts 505, the adjusting nuts 505 are rotated to adjust the distance between the upper chain wheel 503 and the lower chain wheel 502, and therefore the chain 501 is tensioned to adapt to chains 501 with different lengths, and the stroke size of the pumping unit is adjusted. The guide groove 109 is installed on the rack 100, the upper end of the lifting rod 504 penetrates through the guide groove 109 and then is connected with the adjusting nut 505, and the lifting rod 504 is matched with the guide groove 109, so that the swinging of the lifting rod 504 and the upper chain wheel 503 can be reduced, and the running stability can be improved.
Further, as shown in fig. 1 and fig. 3 to fig. 8, the two reversing wheels 601 are symmetrically distributed, the structural stability is better, and two ends of the reversing crankshaft 602 can be rotationally matched with the reversing wheels 601 through the bearing assemblies 603, so that the reversing crankshaft 602 can rotate relative to the reversing wheels 601. When the chain 501 drives the reversing balance box assembly 400 to descend to the limit position of the lower chain wheel 502 through the reversing crankshaft assembly 600, the load of the wellhead where the reversing balance box assembly 400 is connected with the first end of the lifting rope assembly 300 is balanced, the reversing balance box assembly 400 is temporarily in a stop state, the chain 501 drives the reversing crankshaft 602 to move anticlockwise around the lower chain wheel 502, the reversing crankshaft 602 gradually moves from the left side of the lower chain wheel 502 to the right side of the lower chain wheel 502, because the reversing crankshaft 602 can rotate relative to the reversing wheel set, the reversing crankshaft 602 drives the reversing wheel 601 to separate from the reversing frame 404 on the left side in the process of matching with the lower chain wheel 502, the opening direction of the slot 6021 also gradually deflects from the beginning towards the right side to the left side, and when the opening of the slot 6021 faces towards the left side, the reversing wheel 601 enters the reversing frame 404 on the right side under the action of the reversing crankshaft 602, and the reversing crankshaft 602 completes the reversing, the lower sprocket 502 continues to rotate counterclockwise, and the reversing crankshaft assembly 600 drives the reversing balance box assembly 400 to ascend; when the chain 501 drives the reversing balance box assembly 400 to ascend to the limit position of the upper chain wheel 503 through the reversing crankshaft assembly 600, the load of a wellhead connected with the second end of the lifting rope assembly 300 is balanced by the reversing balance box assembly 400, the reversing balance box assembly 400 is temporarily in a stop state, the chain 501 drives the reversing crankshaft 602 to move anticlockwise around the upper chain wheel 503, the reversing crankshaft 602 gradually moves from the right side of the upper chain wheel 503 to the left side of the upper chain wheel 503, the reversing crankshaft 602 drives the reversing wheel 601 to separate from the reversing frame 404 on the right side in the process of matching with the upper chain wheel 503, the opening direction of the slot 6021 also gradually deflects from the beginning towards the left side to the right side, and when the opening of the slot 6021 faces towards the right side, at this time, under the action of the reversing crankshaft 602, the reversing wheel 601 enters the reversing frame 404 on the left side, the reversing crankshaft 602 completes the reversing, and the lower chain wheel 502 continues to rotate anticlockwise, the reversing crankshaft assembly 600 drives the reversing balance box assembly 400 to descend, so that the reversing balance box assembly 400 ascends and descends in a reciprocating mode, and therefore the up-stroke movement and the down-stroke movement of the oil pumping unit are achieved. By adopting the structural design, the motor 701 always runs in one direction and can also complete the reversing. The wellhead load in this embodiment comprises a sucker rod.
Referring to fig. 1, 3 to 14, in an embodiment, the reversing balancing box assembly 400 includes a balancing box 401 for placing a balancing weight 402, a top lug of the balancing box 401 is connected to the second end of the lifting rope assembly 300, a reversing seat 403 is disposed at the bottom of the balancing box 401, two symmetrically distributed reversing frames 404 are mounted on the reversing seat 403, so that the chains 501 are symmetrically distributed with respect to the balancing box 401, and mounting grooves 4042 for supporting two reversing wheels 601 are disposed on the reversing frames 404; when the balance box 401 is lifted and reversed, the chain 501 drives the reversing wheel 601 to switch positions between the mounting grooves 4042 of the two reversing frames 404 through the reversing crankshaft 602, that is, the reversing wheel 601 is movably mounted in the mounting grooves 4042, and the positions can be switched back and forth between the mounting grooves 4042 of the two reversing frames 404 under the action of the chain 501 and the reversing crankshaft 602.
Further, referring to fig. 1 and fig. 3 to fig. 14, the balance box 401 and the reversing seat 403 are located in the machine frame 100, and the balance box 401 and the reversing seat 403 are both provided with a centering wheel 405, and the centering wheel 405 is in sliding fit with the machine frame 100 and is used for guiding the balance box 401 to ascend and descend. The rack 100 is provided with a groove body matched with the righting wheel 405, and the righting wheel 405 is matched with the groove body and used for righting the balance box 401, so that the balance box 401 moves stably up and down and is not easy to deflect. When installed, the balancing box 401 may be placed into the rack 100 from the front door 103.
Further, as shown in fig. 1 and 3 to 14, the reversing frame 404 includes two supporting portions 4041, an avoiding gap 4043 for avoiding the reversing crankshaft 602 is left between the two supporting portions 4041, a mounting groove 4042 is provided on the supporting portion 4041, the mounting groove 4042 is U-shaped, and an opening direction of the mounting groove 4042 faces to another reversing frame 404, that is, an opening of the mounting groove 4042 of the left reversing frame 404 faces to an opening of the mounting groove 4042 of the right reversing frame 404, so that the reversing wheel 601 enters the mounting groove 4042 of the right reversing frame 404 from the mounting groove 4042 of the left reversing frame 404 during the reversing process.
Further, as shown in fig. 1, 3 to 14, the balance box 401 and the reversing seat 403 are both provided with an avoiding port 406 for avoiding the single-chain transmission mechanism 200. The avoidance port 406 on the balance box 401 may be cross-shaped, and can avoid the chain 501, the upper chain wheel 503, the chain wheel shaft 506, the lower chain wheel 502, and the like, so as to avoid interference among the components. Dodge the setting of mouth 406 in the center of switching-over balance box subassembly 400 for balance box 401 falls into four symmetric regions, and balance piece 402 is put in four symmetric regions, is favorable to balance box 401 to keep balance, and the quantity of balance piece 402 can increase and decrease as required, and it can with well head load matching.
Further, as shown in fig. 1 and fig. 3 to fig. 14, the reversing seat 403 may be fixedly connected with the bottom of the balancing box 401 as a whole, the number of the reversing frames 404 is two, and the two reversing frames 404 may be inserted and fixed from both sides of the reversing seat 403, so as to facilitate installation and maintenance. During installation, the reversing frame 404 can enter the rack 100 from the two side doors 102 on the rack 100 to be fixedly connected with the reversing seat 403, so that the reversing wheel 601 is fixedly installed.
Referring to fig. 1, 2 and 15, in an embodiment, the head sheave assembly 200 includes two head sheaves 201, the head sheave 201 is mounted on the top of the machine frame 100 through a head sheave support 202, a cover 108 on the top of the machine frame 100 is used for protecting the head sheave 201, a load cell is mounted between the head sheave support 202 and the machine frame 100, and a suspension point tension, i.e., a tension applied to the first end of the lifting rope assembly 300, is collected through the load cell.
Further, referring to fig. 1, 2 and 15, the lifting rope assembly 300 includes two lifting ropes 301, one lifting rope 301 corresponds to one head sheave 201, a first end of the lifting rope 301 is connected to the sucker rod through a rope hanger 302, and a second end of the lifting rope 301 bypasses the head sheave 201 corresponding to the lifting rope 301 and is connected to a top suspension loop of a balance box 401 of the reversing balance box assembly 400. The two lifting ropes 301 are beneficial to ensuring the balance of the balance box 401.
Further, as shown in fig. 1, 2 and 15, the two head sheaves 201 are disposed in an inclined and symmetrical manner, and the distance between the ends of the two head sheaves 201 close to the rope hanger 302 is smaller than the distance between the ends of the two head sheaves 201 far away from the rope hanger 302, which is beneficial to reducing the distance between the first ends of the two lifting ropes 301 and is convenient for connecting with the sucker rod.
Referring to fig. 1, in an embodiment, the chain-commutated pumping unit further includes a control cabinet 800, and the control cabinet 800 is used for controlling the start and stop of the power device 700, collecting data, and setting the protection load of the pumping rod. Wherein, switch board 800 sets for the number of strokes and the protective load of sucker rod according to demand and operating condition, and the data feedback of weighing sensor collection is to switch board 800, and when the data of feeding back was not in predetermined protective load scope, switch board 800 control alarm system automatic alarm to control power device 700 and slow down or shut down, avoid continuing the operation and damage the sucker rod, prolong the life of sucker rod.
Referring to fig. 1 to 15, in a specific embodiment, the working process is as follows: according to well conditions, the stroke size and the number of times of punching are determined, the stroke size is adjusted through the lifting rod 504 and the increase and decrease of the chain links of the chain 501, and the chain 501 is tensioned through the adjustment of the lifting rod 504. The stroke frequency and the sucker rod protection load are set through the control cabinet 800, the balance weight of the balance box 401 is adjusted according to the actual load of the wellhead, the wellhead load and the balance weight of the balance box 401 are balanced, the balance box 401 is stopped at the bottom of the rack 100 when the balance weight is adjusted, and the balance weight 402 is increased and decreased through the front door 103 at the bottom of the rack 100 to perform balance adjustment. After the balance adjustment is completed, the power unit 700 is started, the motor 701 starts to operate, the chain 501, the lower sprocket 502, and the upper sprocket 503 continuously rotate, and the balance box 401 moves up and down. When the upper stroke of the sucker rod is finished and the lower stroke is started, the balance box 401 is located at the limit position of the lower chain wheel 502, the rope hanger 302 is located at the highest point of the upper stroke, the motion direction of the balance box 401 needs to be converted, a chain link of the reversing crankshaft 602 position of the chain 501 and the reversing crankshaft 602 rotate around the lower chain wheel 502 at the bottom dead center, the balance box 401 is temporarily in a stop state due to the balance with the load of a well head, the reversing crankshaft assembly finishes reversing, the chain 501 continuously rotates, the balance box 401 starts to move upwards, the rope hanger 302 starts to move downwards, and the sucker rod starts to move downwards; when the lower stroke is reached, the balance box 401 is located at the limit position of the upper chain wheel 503, the rope hanger 302 is located at the lowest point of the lower stroke, the balance box 401 needs to perform reversing downward movement, a chain link of the chain 501, which is provided with the reversing crankshaft 602, and the reversing crankshaft 602 rotate around the upper chain wheel 503 at the top dead center, similarly, the load of a wellhead, which is connected with the rope hanger 302, of the balance box 401 is balanced, the upward and downward movement is stopped temporarily, the reversing crankshaft assembly completes the reversing, the balance box 401 starts to move downward, the same rope hanger 302 moves upward, namely, the upward stroke is started, and the reciprocating is performed in such a way, so that the upward and downward stroke of the pumping unit is realized, in the process, the motor 701 always rotates towards one direction, and the reversing is realized at the stop points of the upper chain wheel 503 and the lower chain wheel 502.
The chain reversing pumping unit provided by the invention has the advantages that the single chain 501 is symmetrically arranged relative to the reversing balance box assembly 400, so that the structure is simplified, uneven stress is avoided, faults are reduced, and the power device 700 can realize lifting and reversing of the sucker rod without changing the running direction through the mutual matching of the single-chain transmission mechanism 500, the reversing balance box assembly 400 and the reversing crankshaft assembly 600, so that the energy consumption is reduced; the suspension point tension is collected through the weighing sensor, so that the sucker rod can be effectively prevented from being pressed, the sucker rod is protected, and the service life is prolonged.
In the description of the present specification, reference to the description of the terms "present embodiment," "example," "specific example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a chain switching-over beam-pumping unit, includes frame and lifting rope subassembly, the top of frame is equipped with the head sheave assembly, the first end of lifting rope subassembly is used for being connected with the sucker rod, the second end of lifting rope subassembly is walked around behind the head sheave assembly with can with the balanced switching-over balance box subassembly of sucker rod keep balance is connected, its characterized in that, chain switching-over beam-pumping unit still includes:
the single-chain transmission mechanism comprises an upper chain wheel, a lower chain wheel and a chain, the upper chain wheel is mounted at the upper part in the rack through a lifting rod assembly capable of being adjusted in a lifting mode, the lower chain wheel is mounted at the lower part in the rack, the upper chain wheel and the lower chain wheel are in meshing transmission through the chain, and a reversing crankshaft assembly connected with the reversing balance box assembly is arranged on the chain;
the power device is arranged outside the rack, the output end of the power device extends into the rack and is connected with the lower chain wheel in a transmission mode, the power device drives the lower chain wheel to rotate so that the chain runs to drive the reversing balance box assembly to lift.
2. The chain commutated pumping unit of claim 1, wherein: the reversing crankshaft assembly comprises a reversing crankshaft and two reversing wheels, the reversing wheels are installed on the reversing balance box assembly, the reversing crankshaft is connected with the chain, and two ends of the reversing crankshaft are respectively matched with the two reversing wheels in a rotating mode.
3. The chainsaw pumping unit of claim 2, wherein: and one side of the reversing crankshaft is provided with a groove with a U-shaped structure, and the chain passes through the groove and is connected with the reversing crankshaft.
4. The chainsaw pumping unit of claim 2, wherein: the reversing balance box assembly comprises a balance box for placing a balance block, a top hanging lug of the balance box is connected with the second end of the lifting rope assembly, a reversing seat is arranged at the bottom of the balance box, two symmetrically distributed reversing frames are mounted on the reversing seat, and mounting grooves for supporting two reversing wheels are formed in the reversing frames; when the balance box is lifted and reversed, the chain drives the reversing wheel to switch positions between the two mounting grooves of the reversing frame through the reversing crankshaft.
5. The chainsaw pumping unit of claim 4, wherein: the balance box and the reversing seat are located in the rack, and the balance box and the reversing seat are provided with righting wheels which are in sliding fit with the rack and used for lifting and guiding the balance box.
6. The chainsaw pumping unit of claim 4, wherein: the reversing frame comprises two supporting parts, two the supporting parts are reserved with one another for avoiding the reversing crankshaft avoiding gap, the supporting parts are provided with mounting grooves which are of U-shaped structures, and the opening directions of the mounting grooves face to another reversing frame.
7. The chainsaw pumping unit of claim 4, wherein: the balance box and the reversing seat are provided with avoidance ports for avoiding the single-chain transmission mechanism.
8. The chain commutated pumping unit of claim 1, wherein: the lifter subassembly includes two lifters, two the lifter symmetric distribution is in go up the both sides of sprocket, the lower extreme of lifter with the sprocket hub connection of going up the sprocket, the upper end of lifter pass through adjusting nut with the frame links to each other, adjusting nut is used for adjusting the height of lifter so that the chain tensioning.
9. The chain commutated pumping unit of claim 1, wherein: the head sheave assembly comprises two head sheaves, the head sheaves are arranged at the top of the rack through a head sheave support, and a weighing sensor is arranged between the head sheave support and the rack; the lifting rope assembly comprises two lifting ropes arranged corresponding to the head sheave, the first ends of the lifting ropes are connected with the sucker rod through rope suspenders, and the second ends of the lifting ropes are connected with the reversing balance box assembly after bypassing the head sheave corresponding to the lifting ropes.
10. The chain commutated pumping unit of claim 1, wherein: the chain reversing pumping unit further comprises a control cabinet, and the control cabinet is used for controlling starting and stopping of the power device, collecting data and setting the protection load of the sucker rod.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111201046.6A CN113638718B (en) | 2021-10-15 | 2021-10-15 | Chain reversing oil pumping unit |
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| CN202111201046.6A CN113638718B (en) | 2021-10-15 | 2021-10-15 | Chain reversing oil pumping unit |
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| CN113638718A true CN113638718A (en) | 2021-11-12 |
| CN113638718B CN113638718B (en) | 2022-02-08 |
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| CN2503202Y (en) * | 2001-09-12 | 2002-07-31 | 张兆喜 | Wide-band beam-pumping unit |
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| CN113638718B (en) | 2022-02-08 |
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