CN217602636U - Vertical modular closed pumping unit - Google Patents

Abstract

The utility model particularly relates to a vertical modularization closed beam-pumping unit has solved beam-pumping unit mechanical efficiency low, has maintained difficulty, the stroke can not be adjusted, is difficult to satisfy the problem that the long stroke required. A vertical modular closed pumping unit comprises a rack, a driving mechanism, a transmission mechanism, a balance weight box and a rope hanger, wherein the rack comprises a bottom frame, a driving section, a lower standard section, a driven section, an upper standard section and a top frame; a reversing synchronous shaft is connected between the two chains, a bearing is installed on the side wall of the reversing synchronous shaft, a sliding seat is fixed at the bottom of the balance weight box, and the outer ring of the bearing is connected with the sliding seat in a sliding manner; an upper reversing energy storage mechanism is arranged between the balance weight box and the top frame, and a lower reversing energy storage mechanism is arranged between the sliding seat and the bottom frame. The utility model discloses energy-conservation, mechanical efficiency is high, and light in weight, inertial load are little, easily realize long stroke, have reduced the maintenance cost in the operation, have energy storage and release function, can satisfy long stroke, low stroke number, big pump, the requirement of taking out deeply.

Description

Vertical modular closed pumping unit

Technical Field

The utility model relates to a deep beam-pumping machine in oil field especially relates to the beam-pumping unit, specifically is a vertical modularization closed beam-pumping unit.

Background

With the development of oilfield flooding and the development of a large number of low-permeability oilfields, the downhole depth and the discharge capacity are continuously increased, and with the development of special oilfields (such as thickened oil, high-pour-point oil, wax deposition, sand production and the like), the oil extraction process puts forward the requirements of long stroke, low stroke frequency, large pump, deep pumping and the like on rod pumping equipment. At present, pumping units adopted in oil fields in China include a beam pumping unit and a vertical chain pumping unit.

The beam-pumping unit has the advantages of simple structure and durability. However, due to the limitations of the working principle and structure, the defects of low mechanical efficiency, unstable work, difficult adjustment of stroke and stroke frequency, high energy consumption and the like exist. The requirements of special oil fields are difficult to meet, so the prior beam pumping unit with the four-bar structure can obviously not adapt to the requirements. Firstly, the output torque of the reducer of the beam-pumping unit is in direct proportion to the stroke length, the increase of the stroke increases the overall dimension of the pumping unit, and the increase of the torque reduction box causes the rapid increase of the weight of the whole unit, increases the manufacturing cost and cannot be accepted economically. Secondly, the four-bar linkage of the beam pumping unit determines the non-uniformity of the horse head movement, the suspension point generates larger acceleration, and in order to avoid overlarge acceleration, the swing angle of a walking beam and the crank-connecting rod ratio of the four-bar linkage cannot be overlarge. When the stroke length is increased, the size of the four-bar linkage mechanism is increased, and the overall dimension and weight of the whole machine are obviously increased; when the stroke exceeds 6m, the increase of the volume and the weight of the oil pumping unit becomes a fatal obstacle for popularization and application. The vertical chain oil pumping unit has the contradiction of difficult maintenance, high maintenance cost and incapability of adjusting the stroke in a use site, and also becomes a fatal obstacle for popularization and application. Therefore, the existing oil pumping unit is difficult to meet the requirements of the modern oil extraction process on oil pumping equipment due to the limitations of the working principle and the structure.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve current beam-pumping unit mechanical efficiency low, maintain difficulty, stroke can not adjust, be difficult to satisfy the problem that the long stroke required, provide a vertical modularization closed beam-pumping unit.

The utility model discloses an adopt following technical scheme to realize:

a vertical modular closed pumping unit comprises a frame, a driving mechanism, a transmission mechanism, a balance weight box and a rope hanger, wherein the transmission mechanism comprises a double-row chain wheel and chain mechanism consisting of two driving chain wheels, two driven chain wheels and two chains; the rack comprises a bottom frame, and a driving section, a lower standard section, a driven section, an upper standard section and a top frame which are fixed on the left upper side of the bottom frame and sequentially spliced from bottom to top, wherein the number of the lower standard sections is a plurality; the balance weight box is arranged in the rack and vertically moves among the driving section, the lower standard section, the driven section and the upper standard section through the guide mechanism; two guide wheels which are distributed left and right and transversely arranged are installed on the top frame, and the rope hanger is connected with the top of the balance weight box through a hanging chain wound by the two guide wheels;

the two driving sprockets are respectively arranged on the front inner side wall and the rear inner side wall of the driving section; the two driven chain wheels are respectively arranged on the front inner side wall and the rear inner side wall of the driven joint; a reversing synchronous shaft which is longitudinally arranged is connected between the two chains, a bearing is arranged in the middle of the side wall of the reversing synchronous shaft, a sliding seat which is transversely arranged and is in a rectangular frame shape is fixed at the bottom of the balance weight box, and the outer ring of the bearing is connected with the sliding seat in a sliding manner;

an upper reversing energy storage mechanism is arranged between the balance weight box and the top frame, the upper reversing energy storage mechanism comprises an adjusting bolt fixedly connected to the bottom of the top frame along the vertical direction and two vertical screws fixedly connected to the top end face of the balance weight box and distributed on the left and right, a buffer pressure plate with the middle part being opposite to the adjusting bolt up and down is movably sleeved on the two vertical screws together, and each vertical screw is further sleeved with a locking nut positioned on the upper side of the buffer pressure plate and a buffer spring, a limiting plate and a locking nut I which are positioned on the lower side of the buffer pressure plate and distributed sequentially from top to bottom; two ends of the buffer spring are respectively connected with the buffer pressure plate and the limiting plate;

a lower reversing energy storage mechanism is arranged between the sliding seat and the underframe, the lower reversing energy storage mechanism comprises an adjusting bolt I which is fixedly connected to the upper side of the underframe along the vertical direction and two vertical screw rods I which are fixedly connected to the bottom surface of the sliding seat and distributed left and right, a buffer pressing plate I with the middle part being opposite to the adjusting bolt I up and down is jointly and movably sleeved on the two vertical screw rods I, and each vertical screw rod I is also sleeved with a locking nut II which is positioned on the lower side of the buffer pressing plate I, and a buffer spring I, a limiting plate I and a locking nut III which are positioned on the upper side of the buffer pressing plate I and sequentially distributed from bottom to top; two ends of the buffer spring I are respectively connected with the buffer pressing plate I and the limiting plate I.

Further, actuating mechanism is including installing in the motor of chassis upper right side and installing in two reducers of slave unit front side, rear side, and the input shaft of two reducers is coaxial setting and links up as an organic wholely, and the input shaft that is located the reduction gear of front side is connected with the output shaft transmission of motor.

Furthermore, the top end face of the balance weight box is provided with a direction wheel which is located between the vertical screw rods and is placed longitudinally, the side face of each guide wheel is fixedly provided with two annular groove bodies, the head end of the sling chain is fixedly connected to the front portion of the rope hanger, and the tail end of the sling chain sequentially winds through the two annular groove bodies located on the front side, the direction wheel, the two annular groove bodies located on the rear side and is fixedly connected with the rear portion of the rope hanger.

Furthermore, a transverse upright slide block positioned in an inner cavity of the sliding seat is fixed outside the bearing, four corners of the slide block are provided with four pairs of T-shaped guide wheels, and the four T-shaped guide wheels positioned on the front side are in rolling contact with a front frame edge of the sliding seat; the four T-shaped guide wheels at the rear side are in rolling contact with the rear frame edge of the sliding seat.

Furthermore, both ends of the reversing synchronizing shaft are fixed with U-shaped clamping plates, one chain link of the chain is clamped in an inner cavity of each U-shaped clamping plate, and a movable block located inside each chain link is fixedly connected between two side plates of each U-shaped clamping plate through a mounting bolt.

Further, the reversing synchronizing shaft is connected to the chain by means of an endless chain link welded to its end.

Furthermore, two T-shaped guide rail rods which are distributed left and right and are vertically arranged are jointly fixed on the inner side walls of the driving section, the lower standard section, the driven section and the upper standard section; the guide mechanism is four guide rollers which are arranged at the corners of the balance weight box and are in rolling contact with the T-shaped guide rail rods or four U-shaped slide blocks which are fixedly connected with the corners of the balance weight box and are in sliding contact with the T-shaped guide rail rods.

Furthermore, a fixing plate is fixed on the front side wall and the rear side wall of the driven joint, and an oval shaft penetrating hole and a plurality of strip-shaped adjusting holes are formed in the fixing plate; the wheel shaft of the driven chain wheel penetrates through the shaft penetrating hole, the wheel shaft of the driven chain wheel is fixedly sleeved with a circular outer mounting plate and an L-shaped inner mounting plate which are distributed on two sides of the fixed plate, and a plurality of connecting bolts penetrating through the strip-shaped adjusting holes are connected between the circular outer mounting plate and the L-shaped inner mounting plate; two height adjusting bolts are vertically arranged between the horizontal plate of the L-shaped inner mounting plate and the driven joint.

Further, the bearing is a self-aligning roller bearing; the chain and the hanging chain are both circular ring chains.

The utility model discloses the relative ratio has following advantage in current beam-pumping unit:

(1) The utility model discloses energy-conservation, mechanical efficiency are high. The utility model discloses, adopt double sprocket chain mechanism's drive mechanism to make the transmission line short, inertial mass is little, has improved mechanical transmission efficiency. When the oil well pump rod rises, the chain drives the reversing synchronous shaft and the balance weight box to combine together to enable the oil well pump rod to rise; when the balance weight box rises, the chain drives the reversing synchronizing shaft and the oil pump rod to combine together to enable the balance weight box to rise. Namely: the chain drives the reversing synchronous shaft to pull the oil pumping rod to rise when the oil pumping rod needs to rise; the chain drives the reversing synchronizing shaft to pull the balance weight box to ascend in the ascending process of the balance weight box. In a word, the motor rotating at high speed can continuously and uniformly do work, so that the current of the upper stroke and the current of the lower stroke of the mechanical sucker rod are close to or consistent with each other. The upper reversing energy storage mechanism and the lower reversing energy storage mechanism make full use of energy for reversing the oil well pump rod, so that the current does not have a peak value when the oil well pump rod is reversed or the peak current is not more than the rated current when the oil well pump rod runs to the reversing position. The balance weight iron is placed in the balance weight box of the pumping unit, the balance weight can be increased or decreased to adjust the balance weight, the accurate balance can be achieved according to the measured up-and-down pulling force of the indicator diagram of the oil well, the torque borne by the speed reducer in the working process is minimum, the torque value is kept unchanged or changed very little, and meanwhile, the motor works in a balanced state.

(2) The utility model discloses light in weight, inertial load are little, easily realize long stroke. The pumping unit adopts a transmission mechanism of a double-row chain wheel and chain mechanism, saves the use of section bars compared with a crank four-bar mechanism of a conventional beam pumping unit, greatly reduces the weight of the whole unit, and simultaneously greatly reduces the inertial load born by a speed reducer in the running process of a system. The distance between the closed driving chain wheel and the closed driven chain wheel of the pumping unit determines the stroke of the pumping unit, so that the realization of the long-stroke pumping unit becomes easy and feasible.

(3) The circular ring chain of the utility model is maintenance-free. Most of the chains used by the current vertical pumping unit are sleeve roller plate type chains. The use in harsh environment has the disadvantages of too high maintenance cost and lower strength. The utility model discloses a high strength skin is real durable ring chain and sprocket, uses in adverse circumstances to have non-maintaining, use cost low, characteristics that the reliability is high. The requirement on the installation and use precision of the round-link chain is low, and the chain cannot fall off after long-term use; the round-link chain can adapt to severe environment for a long time, and for example, stones, sand, ash, coal and the like can be used in a contact manner; the single chain link of the round-link chain is a closed round-link part, the structure is simple, and the self tension is large; the diameter of the straight edge of the circular ring chain is closer to the diameter of the oil well pump rod; the linear velocity of the circular ring chain can be safely operated above 4 m/s.

(4) The utility model discloses symmetrical ring chain among the double sprocket chain mechanism forms synchronous orbit, and the principle imitates the hookup symmetry atress of artifical big saw that draws. The counterweight and the reversing mechanism are designed into a whole and have compact structure. The pumping unit has the functions of energy storage and release after the up-down direction change in each cycle process.

(5) The whole pumping unit has no large closed space, is of a grid structure in the air and has good wind resistance. The whole machine adopts a modular structure design, and the transportability is good. Different strokes of the whole machine can be combined by adding or subtracting the lower standard knot; the driving mechanism is designed and installed on the ground, and the whole machine is low in gravity center and good in stability. The reversing mechanism (track driving device) is designed with a universal floating function, and errors can be compensated when the circular chains are asynchronous. The reversing mechanism realizes a universal floating function through the self-aligning roller bearing, and can compensate errors when the round-link chains are asynchronous. The bearings of all moving parts of the whole machine are in a small sealed space. The two circular chains of the whole machine are convenient and easy to tighten.

Drawings

FIG. 1 is a schematic structural view of the present invention (when the reducer is installed in a foot-type configuration);

FIG. 2 is an enlarged partial schematic view at A of FIG. 1;

FIG. 3 is an enlarged partial schematic view at B of FIG. 1;

FIG. 4 is a schematic side view of the present invention with the speed reducer mounted in a suspended configuration;

FIG. 5 is a schematic top view of FIG. 4;

FIG. 6 is a schematic structural view of the driven sprocket mounting portion of the present invention;

fig. 7 is a schematic structural view of the upper reversing energy storage mechanism of the present invention;

FIG. 8 is a schematic structural view of a reversing synchronizing shaft with a U-shaped clamping plate according to the present invention;

fig. 9 is a schematic structural view of a reversing synchronizing shaft with an annular chain link according to the present invention.

In the figure, 1-balance weight box, 2-rope hanger, 3-driving chain wheel, 4-driven chain wheel, 5-chain, 6-bottom frame, 7-driving joint, 8-lower standard joint, 9-driven joint, 10-upper standard joint, 11-top frame, 12-guide wheel, 13-hanging chain, 14-reversing synchronous shaft, 15-bearing, 16-sliding seat, 17-vertical screw rod, 18-buffer pressure plate, 19-locking nut, 20-buffer spring, 21-limiting plate, 22-locking nut I, 23-vertical screw rod I, 24-buffer pressure plate I, 25-locking nut II, 26-buffer spring I, 27-limiting plate I, 28-locking nut III, 29-motor, 30-speed reducer, 31-direction wheel, 32-annular groove body, 33-sliding block, 34-T-shaped guide wheel, 35-U-shaped clamping plate, 36-mounting bolt, 37-annular chain link, 38-T-shaped guide rail rod, 39-guide wheel, 40-fixing plate, 41-through bolt, 43-T-shaped guide wheel, 35-U-shaped clamping plate, L-shaped height adjusting bolt, L-shaped connecting plate, and L-shaped height adjusting bolt.

Detailed Description

A vertical modular closed pumping unit is shown in attached figures 1, 4 and 5 and comprises a frame, a driving mechanism, a transmission mechanism, a balance weight box 1 and a rope hanger 2, wherein the transmission mechanism comprises a double-row chain wheel and chain mechanism consisting of two driving chain wheels 3, two driven chain wheels 4 and two chains 5; the rack comprises a bottom frame 6, and a driving section 7, a lower standard section 8, a driven section 9, an upper standard section 10 and a top frame 11 which are fixed on the left upper side of the bottom frame 6 and sequentially spliced from bottom to top, wherein the number of the lower standard sections 8 is a plurality; the balance weight box 1 is arranged inside the rack, and the balance weight box 1 vertically moves among the driving section 7, the lower standard section 8, the driven section 9 and the upper standard section 10 through the guide mechanism; two guide wheels 12 which are distributed left and right and transversely arranged are installed on the top frame 11, and the rope hanger 2 is connected with the top of the balance weight box 1 through a hanging chain 13 wound by the two guide wheels 12;

as shown in fig. 1 and 4, two driving sprockets 3 are respectively mounted on the front inner side wall and the rear inner side wall of the driving section 7; the two driven chain wheels 4 are respectively arranged on the front inner side wall and the rear inner side wall of the driven joint 9; a reversing synchronizing shaft 14 which is longitudinally arranged is connected between the two chains 5, a bearing 15 is arranged in the middle of the side wall of the reversing synchronizing shaft 14, a sliding seat 16 which is transversely arranged and is in a rectangular frame shape is fixed at the bottom of the balance weight box 1, and the outer ring of the bearing 15 is in sliding connection with the sliding seat 16;

as shown in fig. 1, fig. 2 and fig. 7, an upper reversing energy storage mechanism is arranged between the balance weight box 1 and the top frame 11, the upper reversing energy storage mechanism comprises an adjusting bolt fixedly connected to the bottom of the top frame 11 along the vertical direction and two vertical screws 17 fixedly connected to the top end face of the balance weight box 1 and distributed left and right, a buffer pressure plate 18 with the middle part facing the adjusting bolt up and down is movably sleeved on the two vertical screws 17 together, and each vertical screw 17 is further sleeved with a locking nut 19 positioned on the upper side of the buffer pressure plate 18 and a buffer spring 20, a limiting plate 21 and a locking nut I22 which are positioned on the lower side of the buffer pressure plate 18 and are sequentially distributed from top to bottom; two ends of the buffer spring 20 are respectively connected with the buffer pressure plate 18 and the limiting plate 21;

as shown in the accompanying drawings 1 and 3, a lower reversing energy storage mechanism is arranged between the sliding seat 16 and the underframe 6, the lower reversing energy storage mechanism comprises an adjusting bolt I which is vertically and fixedly connected to the upper side of the underframe 6 and two vertical screws I23 which are fixedly connected to the bottom surface of the sliding seat 16 and distributed left and right, a buffer pressure plate I24 with the middle part facing the adjusting bolt I up and down is jointly and movably sleeved on the two vertical screws I23, and each vertical screw I23 is also sleeved with a locking nut II25 which is positioned on the lower side of the buffer pressure plate I24 and a buffer spring I26, a limiting plate I27 and a locking nut III28 which are positioned on the upper side of the buffer pressure plate I24 and are sequentially distributed from bottom to top; two ends of the buffer spring I26 are respectively connected with the buffer pressure plate I24 and the limiting plate I27.

The utility model discloses a modular design carries out modular design to suspension point load, stroke, reduction gear, can carry out the modularization fast assembly to different suspension point load, stroke, reduction gear like this, constitutes the beam-pumping unit that is applicable to different operating modes, can carry out the modularization combination at the use scene, satisfies different strokes and stroke number. The utility model discloses a static balance method makes the sucker rod balanced with balanced weight box through the method of adding and subtracting the counter weight iron in balanced weight box 1. The utility model discloses an go up switching-over energy storage mechanism, lower switching-over energy storage mechanism, the energy make full use of (energy balance) of loss when making the switching-over of current sucker rod can adjust when the peak value appears in the reversing current of sucker rod, realizes the energy-conservation of beam-pumping unit, and then provides a mechanical efficiency height, the energy consumption is low, can satisfy general oil field and use, also can satisfy the vertical modularization closed beam-pumping unit that special oil field used.

The utility model discloses the well frame adopts the modularized design for the stroke of this beam-pumping unit can be adjusted according to the on-the-spot needs. The utility model discloses well switching-over synchronizing shaft 14, balanced weight box 1, upper reversing energy storage mechanism, the structural design of energy storage mechanism commutates down, can adjust the counter weight on the one hand, make the weight of balanced weight box 1 balanced with the gravity of oil-well pump pole and load, this beam-pumping unit is equal with the gravity of balanced weight box 1 when the oil-well pump pole rises, descends at the work, the electric current that shows up, down stroke is equal basically; and secondly, the energy can be stored and released in an adjustable manner through the upper reversing energy storage mechanism and the lower reversing energy storage mechanism, wherein the energy can be adjusted by adjusting the heights of the adjusting bolt and the adjusting bolt I.

During operation, the two driving sprockets 3 synchronously rotate under the driving of the driving mechanism, so that the two chains 5 perform closed circular motion, and the reversing synchronous shaft 14 is driven to perform vertical closed circular motion. The reversing synchronizing shaft 14 drives the oil well pump rod to descend through the chain 5 in the ascending process, and in the process, the balance weight box 1 ascends under the action of the reversing synchronizing shaft 14 to play a role of balancing weight for descending of the oil well pump rod. The reversing synchronizing shaft 14 drives the oil well pump rod to rise through gravity and the chain 5 in the descending process, and in the process, the balance weight box 1 descends under the action of the reversing synchronizing shaft 14 and self-weight to play a role of balancing weight for the ascending of the oil well pump rod. The reversing synchronous shaft 14 performs closed circular motion along with the chain 5, thereby realizing the up-and-down reciprocating motion of the oil well pump rod. In the whole movement process, the reversing synchronizing shaft 14 only bears the tension of the chain 5 and does not participate in the gravity balance between the balance weight box 1 and the oil well pump rod. In operation, the distance between the driving chain wheel 3 and the driven chain wheel 4 determines the stroke of the pumping unit. The position of the driven chain wheel 4 is adjusted by increasing or decreasing the number of the lower standard knots 8 when the stroke is adjusted, and the number of the lower standard knots 8 determines the stroke of the pumping unit when the pumping unit is designed and manufactured. The oil pumping units with strokes of 4 meters, 6 meters, 8 meters, 10 meters, 12 meters, 14 meters and 16 meters can be freely combined by increasing or decreasing the number of the lower standard knots 8.

In the operation process, the working principle of the upper reversing energy storage mechanism and the lower reversing energy storage mechanism is as follows: a) The balance weight box 1 and the oil well pump rod are ready to change directions and stop from moving to moving, and when the balance weight box 1 is stopped from normal ascending rotation, namely when the oil well pump rod is stopped from normal descending rotation, energy is stored in the upper reversing energy storage mechanism. b) The balance weight box 1 and the oil well pump rod are ready to change directions and start from stop to movement: when the balance weight box 1 normally descends from the stop rotation, namely when the oil well pump rod normally ascends from the stop rotation, the energy in the ascending reversing energy storage mechanism is released for accelerating the starting of the balance weight box 1 and the oil well pump rod. c) The balance weight box 1 and the oil well pump rod are prepared to be reversed from moving to stopping: when the balance weight box 1 is stopped by normal descending rotation, namely when the oil well pump rod is stopped by normal ascending rotation, the lower reversing energy storage mechanism stores energy. d) The balance weight box 1 and the oil well pump rod are ready to change directions and start from stop to movement: when the balance weight box 1 is normally raised from the stop state, namely when the oil well pump rod is normally lowered from the stop state, the energy in the lower reversing energy storage mechanism is released for accelerating the starting of the balance weight box 1 and the oil well pump rod. The energy saving per cycle of the four steps is not necessarily great, but the long-term operating efficiency is considerable. In the whole oil pumping process, the oil pumping unit has twice energy storage and release once per cycle. The height of the adjusting bolt and the adjusting bolt I is adjusted to adjust the amount of stored and released energy, so that the current peak value of the oil pumping unit during reversing is close to the rated current, and the energy-saving effect is achieved.

As shown in fig. 1, fig. 4, and fig. 5, the driving mechanism includes a motor 29 mounted on the upper right side of the bottom frame 6 and two speed reducers 30 mounted on the front side and the rear side of the driven node 9, the input shafts of the two speed reducers 30 are coaxially arranged and connected into a whole, and the input shaft of the speed reducer 30 located on the front side is in transmission connection with the output shaft of the motor 29 through a belt.

It should be noted that, the installation mode of the speed reducers 30 can be selected from foot installation and suspension installation, and when the foot installation is performed, the bases of the two speed reducers 30 are respectively and fixedly connected to the left front part and the left rear part of the underframe 6 through expansion bolts, as shown in fig. 1; when the two speed reducers 30 are installed in a suspended manner, the bases of the two speed reducers are fixedly connected to the front surface and the rear surface of the driven node 9 at the bottom through the installation bolts I, as shown in fig. 4 and 5.

When the electric appliance cabinet is installed, an electric appliance cabinet is arranged beside the motor 29 so as to realize the control of the driving mechanism. The two speed reducers 30 may be replaced with a combined structure of one speed reducer and two chain wheels. In operation, the motor 29 drives the two driving sprockets 3 to rotate synchronously through the reducer 30.

As shown in fig. 1, 4 and 5, a steering wheel 31 is installed on the top end face of the balance weight box 1 and is located between the vertical screws 17 and is placed longitudinally, two annular groove bodies 32 are fixed on the side face of each guide wheel 12, the head end of the sling chain 13 is fixedly connected to the front portion of the rope hanger 2, and the tail end of the sling chain 13 sequentially winds through the two annular groove bodies 32 located on the front side, the steering wheel 31 and the two annular groove bodies 32 located on the rear side and is fixedly connected with the rear portion of the rope hanger 2.

The utility model discloses well chain sling 13 fungible wire rope, lifting rope or hair pigtail, and have intensity height, non-maintaining advantage.

As shown in fig. 1, fig. 3 and fig. 8, a transverse upright sliding block 33 positioned in the inner cavity of the sliding seat 16 is fixed outside the bearing 15, four corners of the sliding block 33 are provided with four pairs of T-shaped guide wheels 34, and the four T-shaped guide wheels 34 positioned on the front side are in rolling contact with the front frame edge of the sliding seat 16; four T-shaped guide wheels 34 on the rear side are in rolling contact with the rear frame edge of the slide shoe 16.

As shown in fig. 8, U-shaped clamping plates 35 are fixed at both ends of the reversing synchronizing shaft 14, one link of the chain 5 is clamped in an inner cavity of the U-shaped clamping plate 35, and a movable block located inside the link is fixedly connected between two side plates of the U-shaped clamping plate 35 through a mounting bolt 36.

The structural design realizes the detachable connection of the reversing synchronizing shaft 14 and the chain 5, and the maintenance is convenient.

As shown in fig. 9, the reversing synchronizing shaft 14 is connected to the chain 5 by an endless link 37 welded to its end.

As shown in fig. 1 and 4, two T-shaped guide rail rods 38 which are distributed left and right and are vertically arranged are fixed on the inner side walls of the driving section 7, the lower standard section 8, the driven section 9 and the upper standard section 10; the guide mechanism is four guide rollers 39 which are arranged at the corner of the balance weight box 1 and are in rolling contact with the T-shaped guide rail rod 38 or four U-shaped slide blocks which are fixedly connected at the corner of the balance weight box 1 and are in sliding contact with the T-shaped guide rail rod 38.

As shown in fig. 1, fig. 2 and fig. 6, the front side wall and the rear side wall of the driven joint 9 are both fixed with a fixing plate 40, and the fixing plate 40 is provided with an oval shaft penetrating hole 41 and a plurality of strip-shaped adjusting holes 42; the axle of the driven sprocket 4 passes through the axle-passing hole 41, the round outer mounting plate 43 and the L-shaped inner mounting plate 44 which are distributed on two sides of the fixing plate 40 are fixedly sleeved on the axle of the driven sprocket 4, and a plurality of connecting bolts 45 which pass through the strip-shaped adjusting holes 42 are connected between the round outer mounting plate 43 and the L-shaped inner mounting plate 44; two height-adjusting bolts 46 are vertically arranged between the horizontal plate of the L-shaped inner mounting plate 44 and the driven joint 9.

This structural design has realized the adjustment of 4 positions of driven sprocket, and one is the tensioning of making things convenient for double sprocket chain mechanism, and two can adjust the position of driven sprocket 4 after long-term operation to guarantee operational reliability.

The bearing 15 is a self-aligning roller bearing; the chain 5 and the hanging chain 13 are both circular ring chains.

The utility model discloses an adopt high strength, the durable ring chain of skin and sprocket, when increasing structural strength, saved the process of frequent maintenance, use also non-maintaining in adverse circumstances. The self-aligning roller bearing enables the joint of the reversing synchronous shaft 14 to have a universal floating function, and errors can be compensated when the circular chain is asynchronous.

In the specific implementation process, the front side wall and the rear side wall of the driving joint 7 are both provided with mounting plates with mounting holes, and the wheel shafts of the two driving chain wheels 3 respectively penetrate through the two mounting holes. The utility model discloses in two leading wheels 12 can be replaced for a big directive wheel to it is balanced to realize chain sling 13. The underframe 6 is detachably connected with the driving joint 7, the driving joint 7 is connected with the lower standard joint 8, the lower standard joint 8 is connected with the driven joint 9, the driven joint 9 is connected with the upper standard joint 10, and the upper standard joint 10 is connected with the top frame 11 through four connecting pins distributed in a rectangular shape.

The utility model discloses well roof-rack 11 is including the roof-rack body that is located the bottom and is connected with last standard festival 10 rectangular base and the slender that is located upper portion, and rectangular base is connected with bolt detachably through a plurality of mounting panels with the roof-rack body, through the mounted position of adjustment mounting panel and bolt during the connection, can realize the roof-rack body along the fore-and-aft direction, control the position fine setting of direction for the alignment of installation and well head.

The utility model discloses easily realize limit for tonnage intelligent control. The control system can realize load-limiting intelligent control by using a load-limiting contactor, and because the working tension does not directly participate in balancing the acting force between the weight box 1 and the oil pumping pump rod, the tension of the reversing synchronizing shaft is easy to control, and the load can be easily limited in one cycle period, thereby protecting the oil pumping unit and an electrical appliance system.

The utility model discloses can cooperate current anti-falling device to realize the function of preventing falling of balanced weight box 1, when the sucker rod lost the load, balanced weight box 1 can instantaneous braking accident prevention emergence.

The utility model provides a counterweight iron can be replaced for the liquid that the volume can be adjusted in a flexible way, realizes dynamic balance, and then adjusts the counter weight (increase and decrease counter weight) according to the current change of stroke about the inspection sucker rod.

The utility model discloses rack construction can adjust according to the needs of inclined shaft or horizontal well, splices the structure of non-standard festival in the frame when necessary.

Claims (9)

1. A vertical modular closed pumping unit comprises a rack, a driving mechanism, a transmission mechanism, a balance weight box (1) and a rope hanger (2), wherein the transmission mechanism comprises a double-row chain wheel and chain mechanism consisting of two driving chain wheels (3), two driven chain wheels (4) and two chains (5); the method is characterized in that: the rack comprises a bottom frame (6), and a driving section (7), a lower standard section (8), a driven section (9), an upper standard section (10) and a top frame (11) which are fixed on the left upper side of the bottom frame (6) and sequentially spliced from bottom to top, wherein the number of the lower standard sections (8) is multiple; the balance weight box (1) is arranged inside the rack, and the balance weight box (1) vertically moves among the driving joint (7), the lower standard joint (8), the driven joint (9) and the upper standard joint (10) through the guide mechanism; two guide wheels (12) which are distributed left and right and are transversely arranged are arranged on the top frame (11), and the rope hanger (2) is connected with the top of the balance weight box (1) through a hanging chain (13) wound by the two guide wheels (12);

the two driving sprockets (3) are respectively arranged on the front inner side wall and the rear inner side wall of the driving section (7); the two driven chain wheels (4) are respectively arranged on the front inner side wall and the rear inner side wall of the driven joint (9); a reversing synchronous shaft (14) which is longitudinally arranged is connected between the two chains (5), a bearing (15) is installed in the middle of the side wall of the reversing synchronous shaft (14), a sliding seat (16) which is transversely arranged and is in a rectangular frame shape is fixed at the bottom of the balance weight box (1), and the outer ring of the bearing (15) is in sliding connection with the sliding seat (16);

an upper reversing energy storage mechanism is arranged between the balance weight box (1) and the top frame (11), the upper reversing energy storage mechanism comprises an adjusting bolt fixedly connected to the bottom of the top frame (11) along the vertical direction and two vertical screw rods (17) fixedly connected to the top end face of the balance weight box (1) and distributed on the left and right, a buffer pressing plate (18) with the middle part being opposite to the adjusting bolt up and down is movably sleeved on the two vertical screw rods (17) together, and a locking nut (19) positioned on the upper side of the buffer pressing plate (18) and a buffer spring (20), a limiting plate (21) and a locking nut I (22) which are positioned on the lower side of the buffer pressing plate (18) and are sequentially distributed from top to bottom are further sleeved on each vertical screw rod (17); two ends of the buffer spring (20) are respectively connected with the buffer pressure plate (18) and the limiting plate (21);

a lower reversing energy storage mechanism is arranged between the sliding seat (16) and the underframe (6), the lower reversing energy storage mechanism comprises an adjusting bolt I which is vertically and fixedly connected to the upper side of the underframe (6) and two vertical screw rods I (23) which are fixedly connected to the bottom surface of the sliding seat (16) and distributed at the left and the right, a buffer pressure plate I (24) with the middle part being opposite to the adjusting bolt I up and down is jointly movably sleeved on the two vertical screw rods I (23), and a locking nut II (25) which is positioned at the lower side of the buffer pressure plate I (24) and a buffer spring I (26), a limiting plate I (27) and a locking nut III (28) which are positioned at the upper side of the buffer pressure plate I (24) and are sequentially distributed from bottom to top are further sleeved on each vertical screw rod I (23); two ends of the buffer spring I (26) are respectively connected with the buffer pressure plate I (24) and the limiting plate I (27).

2. The vertical modular closed pumping unit of claim 1, wherein: the driving mechanism comprises a motor (29) arranged on the upper right side of the bottom frame (6) and two speed reducers (30) arranged on the front side and the rear side of the driven node (9), input shafts of the two speed reducers (30) are coaxially arranged and are connected into a whole, and the input shaft of the speed reducer (30) arranged on the front side is in transmission connection with an output shaft of the motor (29).

3. The vertical modular closed pumping unit of claim 1, wherein: the top end face of balanced weight box (1) is installed and is located direction wheel (31) between vertical screw rod (17) and vertically place, the side of every leading wheel (12) all is fixed with two annular groove bodies (32), the head end fixed connection of chain sling (13) is in the front portion of polished rod eye (2), the tail end of chain sling (13) is in proper order around two annular groove bodies (32) that are located the front side, direction wheel (31), two annular groove bodies (32) that are located the rear side, and with the rear portion fixed connection of polished rod eye (2).

4. The vertical modular closed pumping unit of claim 1, wherein: a transverse upright sliding block (33) positioned in the inner cavity of the sliding seat (16) is fixed outside the bearing (15), four pairs of T-shaped guide wheels (34) are installed at four corners of the sliding block (33), and the four T-shaped guide wheels (34) positioned on the front side are in rolling contact with the front frame edge of the sliding seat (16); four T-shaped guide wheels (34) positioned at the rear side are in rolling contact with the rear frame edge of the sliding seat (16).

5. The vertical modular closed pumping unit of claim 1, wherein: u-shaped clamping plates (35) are fixed at two ends of the reversing synchronizing shaft (14), one chain link of the chain (5) is clamped in an inner cavity of the U-shaped clamping plate (35), and a movable block located inside the chain link is fixedly connected between two side plates of the U-shaped clamping plate (35) through a mounting bolt (36).

6. The vertical modular closed pumping unit of claim 1, wherein: the reversing synchronizing shaft (14) is connected to the chain (5) by means of an annular chain link (37) welded to its end.

7. The vertical modular closed pumping unit of claim 1, wherein: two T-shaped guide rail rods (38) which are distributed left and right and are vertically arranged are jointly fixed on the inner side walls of the driving section (7), the lower standard section (8), the driven section (9) and the upper standard section (10); the guide mechanism is four guide rollers (39) which are arranged at the corners of the balance weight box (1) and are in rolling contact with the T-shaped guide rail rods (38) or four U-shaped slide blocks which are fixedly connected to the corners of the balance weight box (1) and are in sliding contact with the T-shaped guide rail rods (38).

8. The vertical modular closed pumping unit of claim 1, wherein: a fixed plate (40) is fixed on the front side wall and the rear side wall of the driven joint (9), and an oval shaft penetrating hole (41) and a plurality of strip-shaped adjusting holes (42) are formed in the fixed plate (40); a wheel shaft of the driven chain wheel (4) penetrates through the shaft penetrating hole (41), a round outer mounting plate (43) and an L-shaped inner mounting plate (44) which are distributed on two sides of the fixing plate (40) are fixedly sleeved on the wheel shaft of the driven chain wheel (4), and a plurality of connecting bolts (45) penetrating through the strip-shaped adjusting holes (42) are connected between the round outer mounting plate (43) and the L-shaped inner mounting plate (44); two height adjusting bolts (46) are vertically arranged between the horizontal plate of the L-shaped inner mounting plate (44) and the driven joint (9).

9. The vertical modular closed pumping unit of claim 1, wherein: the bearing (15) is a self-aligning roller bearing; the chain (5) and the hanging chain (13) are both circular chains.

Images