Walking beam balance multiple-stroke pumping unit

Abstract

The utility model relates to the technical field of oil pumping units, in particular to a walking beam balance multiple-stroke oil pumping unit which comprises a base, a motor, a fixing frame and a support are installed on the top of the base, a reduction gearbox is fixedly connected to the top of the fixing frame, and a fixing box is fixedly connected to one side of a walking beam. A guide rail, a first weight box, a second weight box and a third weight box are arranged on one side of the walking beam, and a gravity assembly used for automatically achieving dynamic gravity center adjustment according to load changes in different stroke stages is arranged in the fixed box. Automatic gravity center adjustment can be achieved according to load changes of different stroke stages in the operation process of the pumping unit, the balance of a walking beam system in the operation process is remarkably improved, energy consumption is effectively reduced, structural abrasion is reduced, meanwhile, the multiple inserting grooves are formed in the top of the weight box, the number of balancing weights can be flexibly increased or decreased according to needs, and the service life of the pumping unit is prolonged. And the adjustment precision and adaptability are further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil pumping unit technical field especially relates to a beam balance double stroke oil pumping unit. BACKGROUND

[0002] Oil pumping unit is the most widely used equipment in oilfield production operation, among them beam type oil pumping unit is widely used because of its simple structure, stable operation and convenient maintenance.

[0003] In the prior art, such as the announcement number for: CN218816346U "beam balance double stroke oil pumping unit", including base, frame, fixed pulley, movable pulley, steel rope, beam and horse head, the base upside fixed installation has frame, the frame right part upside rotation installs fixed pulley, the frame left part upside hinged installation has anti L shape's beam to the fixed pulley left position, the beam right part upside is equipped with movable pulley, the frame right part and steel rope's first end fixed connection together, this technology although structure is reasonable and compact, convenient to use, beam balance double stroke oil pumping unit combines the excellent mechanical properties and stability of conventional beam type oil pumping unit, realizes the long stroke structure of beam type oil pumping unit on the basis of conventional beam type oil pumping unit using movable pulley double stroke principle, but this technology has some defects in actual use: because this technology adopts fixed weight structure, when double stroke, beam needs to complete two strokes in a cycle, the load variation range corresponding to its upstroke and downstroke is larger, leading to traditional fixed weight structure can not effectively adapt to this dynamic change load distribution, prone to equipment operation process before and after the moment of inertia imbalance problem, this moment of inertia imbalance not only affects the motion stability of beam, but also aggravates the mechanical impact and wear of equipment parts, and further reduces the service life of the whole machine. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model aims at providing a beam balance double stroke oil pumping unit to solve the problem that the load changes greatly in upstroke and downstroke during double stroke operation of the existing oil pumping unit, the traditional fixed weight structure is difficult to adapt, which easily leads to moment of inertia imbalance, reduces the motion stability of beam and aggravates mechanical wear.

[0005] Based on the above purpose, the utility model provides a kind of beam balance double-stroke pumping unit, including base, the top of base is equipped with motor, fixed frame and support, the top of fixed frame is fixedly connected with reduction gearbox, the output end of motor is connected with the input end of reduction gearbox by belt pulley and transmission, the output end of reduction gearbox is installed with crank, the one end of crank is fixedly connected with balance block, the one side of crank middle part is rotatably connected with connecting rod by shaft, the one end of connecting rod is rotatably connected with beam by shaft, the bottom of beam middle part is rotatably connected with the top of support, the one end of beam is fixedly connected with horse head, the one side of beam is fixedly connected with fixed box, the inside of fixed box is provided with gravity assembly for automatically realizing dynamic barycenter adjustment according to the load change of different stroke stages, the gravity assembly includes guide rail fixedly connected to the one side of beam, the outside of guide rail is slidably connected with first counterweight box, second counterweight box and third counterweight box, the position of second counterweight box is between first counterweight box and third counterweight box, the both ends of guide rail are fixedly connected with baffle respectively.

[0006] Preferably, the top of the first counterweight box, the second counterweight box and the third counterweight box is respectively provided with a plurality of slots, the inside of the slot is placed with a counterweight block, the number of the counterweight block is adjusted according to the actual use.

[0007] Preferably, the bottom of the first counterweight box, the second counterweight box and the third counterweight box is respectively installed with a moving wheel, the bottom of the moving wheel is in contact with the top of the bottom of the fixed box, the bottom of the inside of the first counterweight box, the second counterweight box and the third counterweight box is provided with a plurality of holes, the bottom of the inside of the fixed box is provided with a plurality of holes.

[0008] Preferably, the one side of the first counterweight box, the second counterweight box and the third counterweight box is respectively fixedly connected with a connecting column, a plurality of the connecting columns are respectively fixedly connected with a traction rope between each other.

[0009] Preferably, the one side of the first counterweight box, the second counterweight box and the third counterweight box relative to the horse head is respectively fixedly connected with a plurality of buffer rods and second springs, the inside of the one end of the buffer rod is slidably connected with a buffer cylinder, the second spring is sleeved on the outside of the buffer rod and the buffer cylinder, the one end of the buffer cylinder away from the buffer rod is fixedly connected with a protective pad, the one end of the second spring is fixedly connected with the one side of the protective pad, the protective pad is of rubber material.

[0010] Preferably, the inside of the one end of the fixed box away from the horse head is fixedly connected with a plurality of first springs and connecting cylinders, the inside of the one end of the connecting cylinder is slidably connected with a positioning rod, the first spring is sleeved on the outside of the connecting cylinder and the positioning rod, the one end of the positioning rod is fixedly connected with a buffer pad, the buffer pad is of rubber material, the one end of the first spring is fixedly connected with the one side of the buffer pad.

[0011] Preferably, one side of the fixed box is provided with a sliding groove, one side of the third counterweight box is fixedly connected with a sliding block, one end of the sliding block away from the third counterweight box is slidably connected with the inside of the sliding groove, and one side of the sliding block is fixedly connected with a pull rope.

[0012] Preferably, the bottom of the middle part of the beam is fixedly connected with a rotating shaft, the outside of the rotating shaft is rotatably connected with the inside of the top of the support, and one end of the rotating shaft is fixedly connected with a rope winding roller.

[0013] Preferably, one side of the top of the support is fixedly connected with a connecting frame, a pulley is installed at one end of the connecting frame, one end of the pull rope away from the sliding block is fixedly connected with the outside of the pulley and the outside of the rope winding roller, the rope winding roller winds the one end of the pull rope when the horse head moves downward, and the length of the pull rope is matched with the path length of the movement of the third counterweight box.

[0014] The utility model discloses the beneficial effects of:

[0015] 1. Through the gravity assembly, the guide rail arranged on one side of the beam and the movable first, second and third counterweight boxes, automatic gravity center adjustment can be realized according to the load change in different stroke stages in the operation process of the pumping unit, the balance of the beam system in the operation process is significantly improved, the energy consumption is effectively reduced, the structural wear is reduced, meanwhile, a plurality of insertion grooves are arranged on the top of the counterweight box, the counterweight blocks can be flexibly added or reduced according to the requirement, and the adjustment precision and adaptability are further improved.

[0016] Through the rotating shaft, the rope winding roller and the pull rope structure, when the horse head moves downward, the rope winding roller winds the one end of the pull rope, and the other end of the pull rope pulls the movement of the third counterweight box, the structure utilizes the mechanical energy of the pumping unit, the movement of the third counterweight box is driven in advance, thereby avoiding the energy waste that the motor directly drives the whole counterweight box to ascend, the overall energy efficiency is improved, and the power transmission is optimized. ACCURACY OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0018] Figure 1 It is the whole three-dimensional structure schematic diagram of the utility model;

[0019] Figure 2 It is the utility model Figure 1 Schematic diagram of side view structure;

[0020] Figure 3 It is gravity assembly part structure schematic view of the utility model;

[0021] Figure 4 It is fixed box internal structure schematic view of the utility model;

[0022] Figure 5 It is the utility model Figure 4 It is A place amplification structure schematic view in the middle;

[0023] Figure 6 It is the utility model Figure 5 It is side view section structure schematic view.

[0024] Marked as in the drawing:

[0025] 1, base; 2, motor; 3, fixed frame; 4, reduction box; 5, crank; 6, support; 7, balance block; 8, connecting rod; 9, beam; 10, horse head; 11, fixed box; 12, guide rail; 13, first counterweight box; 14, second counterweight box; 15, third counterweight box; 16, baffle; 17, moving wheel; 18, traction rope; 19, first spring; 20, second spring; 21, buffer cylinder; 22, protective pad; 23, buffer rod; 24, slot; 25, counterweight block; 26, connecting column; 27, sliding block; 28, pull rope; 29, sliding groove; 30, rotating shaft; 31, rope collecting roller; 32, connecting frame; 33, pulley; 34, connecting cylinder; 35, alignment rod; 36, buffer pad. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following in combination with specific embodiment, the utility model is further detailed.

[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the utility model should be understood by the person skilled in the art as the usual meaning. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but only distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] As the utility model Figures 1 to 6The provided is a beam balance double-stroke pumping unit, including a base 1, a motor 2, a fixed frame 3 and a support 6 mounted on the top of the base 1, a reduction box 4 fixedly connected to the top of the fixed frame 3, a drive shaft of the motor 2 in transmission connection with an input end of the reduction box 4, a crank 5 mounted on an output end of the reduction box 4, a balance block 7 fixedly connected to one end of the crank 5, a connecting rod 8 rotatably connected to one side of the middle of the crank 5, a beam 9 rotatably connected to one end of the connecting rod 8, the bottom of the middle of the beam 9 rotatably connected to the top of the support 6, a horse head 10 fixedly connected to one end of the beam 9, a fixed box 11 fixedly connected to one side of the beam 9, a gravity assembly for automatically realizing dynamic gravity center adjustment according to load changes in different stroke stages arranged in the inside of the fixed box 11, the gravity assembly including a guide rail 12 fixedly connected to one side of the beam 9, first, second and third counterweight boxes 13, 14 and 15 slidably connected to the outside of the guide rail 12, the second counterweight box 14 located between the first and third counterweight boxes 13 and 15, and baffles 16 fixedly connected to both ends of the guide rail 12.

[0029] The guide rail 12 and the movable first, second and third counterweight boxes 13, 14 and 15 arranged on one side of the beam 9 can automatically realize gravity center adjustment according to load changes in different stroke stages during the operation of the pumping unit, significantly improve the balance of the beam 9 system during operation, effectively reduce energy consumption and structural wear, and avoid the problem that the counterweight boxes move out of the outside of the guide rail 12 through the baffles 16.

[0030] As shown in Figure 1 , Figure 4 and Figure 6 , the top of each of the first, second and third counterweight boxes 13, 14 and 15 is provided with a plurality of slots 24, and counterweight blocks 25 are arranged in the inside of each slot 24, the number of the counterweight blocks 25 being adjusted according to actual use.

[0031] The plurality of slots 24 arranged on the top of each counterweight box can flexibly increase or decrease the counterweight blocks 25 as needed, further improve the adjustment accuracy and adaptability, and the three independent counterweight box structures make the gravity adjustment more flexible and accurate in space, not only can the number of the counterweight blocks 25 in each box be adjusted individually, but also the system gravity center in the front and back directions can be continuously adjusted through the relative movement of the counterweight blocks 25 in the guide rail, thereby adapting to different well conditions or pump load changes.

[0032] As shown in Figure 1 , Figure 4 and Figure 6As shown, the bottom of the first counterweight box 13, the second counterweight box 14 and the third counterweight box 15 is respectively provided with a moving wheel 17, the bottom of the moving wheel 17 is in contact with the top of the bottom of the fixed box 11, the bottom of the inside of the first counterweight box 13, the second counterweight box 14 and the third counterweight box 15 is provided with a plurality of holes, and the bottom of the inside of the fixed box 11 is provided with a plurality of holes;

[0033] Through the moving wheel 17, the movement of the counterweight box is facilitated. In use, when the ram 10 moves downward, the other end of the walking beam 9 will be lifted upward, at this time, the third counterweight box 15 will slide outside the guide rail 12, and at the same time, the third counterweight box 15 will move to the side of the ram 10 with the counterweight block 25, thereby increasing the gravity of the ram 10, so as to reduce the load of the motor 2. When the ram 10 moves downward more, the second counterweight box 14 and the first counterweight box 13 will move to the side of the ram 10 in turn, thereby significantly improving the balance of the walking beam 9 system during operation, effectively reducing energy consumption. At the same time, through the plurality of holes provided in the inside of the first counterweight box 13, the second counterweight box 14, the third counterweight box 15 and the fixed box 11, the problem of affecting the gravity balance control caused by the accumulation of rainwater in the inside is avoided.

[0034] As shown in Figure 4 , one side of the first counterweight box 13, the second counterweight box 14 and the third counterweight box 15 is respectively fixedly connected with a connecting column 26, and a plurality of connecting columns 26 are respectively fixedly connected with a traction rope 18 between two connecting columns 26;

[0035] Through the connecting column 26 connecting the first counterweight box 13, the second counterweight box 14 and the third counterweight box 15, the relative coordinated movement between the counterweight boxes can be realized during the movement of the walking beam 9, so as to prevent a single dramatic displacement or deviation of a counterweight box, thereby maintaining the stability of the overall gravity center distribution.

[0036] As shown in Figure 4 and Figure 6 , a plurality of buffer rods 23 and second springs 20 are respectively fixedly connected to the side of the first counterweight box 13, the second counterweight box 14 and the third counterweight box 15 relative to the ram 10, a buffer barrel 21 is slidably connected to one end of the buffer rod 23, the second spring 20 is sleeved outside the buffer rod 23 and the buffer barrel 21, a protective pad 22 is fixedly connected to the end of the buffer barrel 21 away from the buffer rod 23, one end of the second spring 20 is fixedly connected to one side of the protective pad 22, and the protective pad 22 is made of rubber material;

[0037] The buffer cylinder 21 cooperates with the buffer rod 23 and the second spring 20, which can effectively prevent the impact injury of the counterweight, and the protective pad 22 made of rubber is installed at the end to enhance the anti-collision ability, avoid hard collision between structures, and improve the service life and safety. When the one counterweight box is about to contact the side of the next counterweight box, the protective pad 22 first contacts the side of the counterweight box to promote soft contact between the counterweight boxes, and the buffer cylinder 21 with the second spring 20 is retracted, and one end of the buffer rod 23 is retracted into one end of the buffer cylinder 21, thereby playing a buffering role and avoiding damage to the structure caused by hard impact.

[0038] As shown in Figure 4 and Figure 5 , the fixed box 11 is fixedly connected with a plurality of first springs 19 and a connecting cylinder 34 at the inside of the end away from the horse head 10, the connecting cylinder 34 is slidably connected with a positioning rod 35 at the inside of one end, the first spring 19 is sleeved on the outside of the connecting cylinder 34 and the positioning rod 35, the positioning rod 35 is fixedly connected with a buffer pad 36 at one end, the buffer pad 36 is made of rubber, and one end of the first spring 19 is fixedly connected with one side of the buffer pad 36;

[0039] The connecting cylinder 34, the positioning rod 35, the first spring 19 and the buffer pad 36 are arranged to avoid the problem that the fixed box 11 is damaged when the counterweight box collides with one side of the fixed box 11. When the first counterweight box 13 moves to one side of the fixed box 11, it first contacts the buffer pad 36 on one side for soft contact, and then the first spring 19 is retracted while the one end of the positioning rod 35 moves into the inside of one end of the connecting cylinder 34, thereby playing a buffering role and avoiding damage caused by hard impact.

[0040] As shown in Figures 1 to 3 , the fixed box 11 is provided with a sliding groove 29 on one side, the third counterweight box 15 is fixedly connected with a sliding block 27 on one side, the end away from the third counterweight box 15 of the sliding block 27 is slidably connected with the inside of the sliding groove 29, the sliding block 27 is fixedly connected with a pull rope 28 on one side, the bottom of the middle of the walking beam 9 is fixedly connected with a rotating shaft 30, the outside of the rotating shaft 30 is rotatably connected with the inside of the top of the support 6, the one end of the rotating shaft 30 is fixedly connected with a rope winding roller 31, the top of the support 6 is fixedly connected with a connecting frame 32 on one side, the connecting frame 32 is installed with a pulley 33 at one end, the end away from the sliding block 27 of the pull rope 28 is fixedly connected with the outside of the pulley 33 and the outside of the rope winding roller 31, the pull rope 28 is reeled in by the rope winding roller 31 when the horse head 10 moves downward, and the length of the pull rope 28 is adapted to the path length of the third counterweight box 15;

[0041] Through the structure of the rotating shaft 30, the rope collecting roller 31 and the pull rope 28, when the horse head 10 moves downward, the walking beam 9 rotates with the rotating shaft 30, the rotating shaft 30 rotates with the rope collecting roller 31 in the positive direction, at this time, the rope collecting roller 31 drives one end of the pull rope 28 to be wound, and the other end of the pull rope 28 pulls the third counterweight box 15 to move, the structure utilizes the mechanical energy of the pumping unit itself, drives the movement of the third counterweight box 15 in advance, thereby avoiding the energy waste that the motor 2 directly pushes the whole counterweight box to rise, improving the overall energy efficiency and optimizing the power transmission, and at the later return stroke, the walking beam 9 reversely rotates with the rotating shaft 30, at this time, the rope collecting roller 31 is unwound, thereby facilitating the return stroke of the counterweight box.

[0042] Those skilled in the art will understand that the above discussion of any embodiment is merely exemplary and is not intended to be limiting of the scope of the present application (including claims) to these examples. Any of the above embodiments, or portions thereof, can be combined, and the steps can be implemented in any order, in accordance with the teachings of the present application. Many other variations in the above-described embodiments and in the features described therein can be made in light of the above teachings, without departing from the spirit and scope of the present application. Therefore, the scope of the present application is not intended to be limited to the above examples, but is to be accorded the full scope consistent with the claims, the full scope being defined by the appended claims.

[0043] The present application is intended to cover all such alternatives, modifications, and variations as fall within the scope of the broadest possible interpretation of the appended claims. Accordingly, any and all such alternatives, modifications, and variations are intended to be encompassed by the appended claims.

Claims

1. A beam balance double-stroke pumping unit, comprising a base (1), a motor (2), a fixing frame (3) and a support (6) are mounted on the top of the base (1), a reduction box (4) is fixedly connected to the top of the fixing frame (3), the output end of the motor (2) is in transmission connection with the input end of the reduction box (4) through a belt pulley, the output end of the reduction box (4) is provided with a crank (5), one end of the crank (5) is fixedly connected with a balance block (7), one side of the middle part of the crank (5) is rotatably connected with a connecting rod (8) through a shaft, one end of the connecting rod (8) is rotatably connected with a beam (9) through a shaft, the bottom of the middle part of the beam (9) is rotatably connected with the top of the support (6), one end of the beam (9) is fixedly connected with a horse head (10), characterized in that, One side of the walking beam (9) is fixedly connected with a fixed box (11), the inside of the fixed box (11) is provided with a gravity assembly for automatically realizing dynamic gravity center adjustment according to the load change in different stroke stages; The gravity assembly comprises a guide rail (12) fixedly connected to one side of the walking beam (9), the outside of the guide rail (12) is slidably connected with a first counterweight box (13), a second counterweight box (14) and a third counterweight box (15), the position of the second counterweight box (14) is between the first counterweight box (13) and the third counterweight box (15), and the two ends of the guide rail (12) are fixedly connected with baffles (16), respectively.

2. A beam balanced double-stroke pumping unit according to claim 1, characterized in that, The top of the first counterweight box (13), the second counterweight box (14) and the third counterweight box (15) is respectively provided with a plurality of insertion grooves (24), the inside of the insertion groove (24) is placed with a counterweight block (25), and the number of the counterweight block (25) is adjusted according to actual use.

3. A beam balanced double-stroke pumping unit according to claim 2, characterized in that, The bottom of the first counterweight box (13), the second counterweight box (14) and the third counterweight box (15) is respectively provided with a movable wheel (17), the bottom of the movable wheel (17) is in contact with the top of the bottom of the fixed box (11), a plurality of holes are formed in the bottom of the inside of the first counterweight box (13), the second counterweight box (14) and the third counterweight box (15), and a plurality of holes are formed in the bottom of the inside of the fixed box (11).

4. A beam balance double stroke pumping unit according to claim 3, characterized in that, One side of the first counterweight box (13), the second counterweight box (14) and the third counterweight box (15) is respectively fixedly connected with a connecting column (26), and a plurality of connecting columns (26) are respectively fixedly connected with a traction rope (18) between every two connecting columns (26).

5. A beam balance double stroke pumping unit according to claim 4, characterized in that, One side of the first counterweight box (13), the second counterweight box (14) and the third counterweight box (15) is respectively fixedly connected with a plurality of buffer rods (23) and a second spring (20) opposite to the side of the horse head (10), the inside of one end of the buffer rod (23) is slidably connected with a buffer cylinder (21), the second spring (20) is sleeved outside the buffer rod (23) and the buffer cylinder (21), one end of the buffer cylinder (21) away from the buffer rod (23) is fixedly connected with a protective pad (22), one end of the second spring (20) is fixedly connected with one side of the protective pad (22), and the protective pad (22) is made of rubber.

6. A beam balance double stroke pumping unit according to claim 5, characterized in that, The inside of one end of the fixed box (11) away from the horse head (10) is fixedly connected with a plurality of first springs (19) and a connecting cylinder (34), the inside of one end of the connecting cylinder (34) is slidably connected with a positioning rod (35), the first spring (19) is sleeved outside the connecting cylinder (34) and the positioning rod (35), one end of the positioning rod (35) is fixedly connected with a buffer pad (36), the buffer pad (36) is made of rubber, and one end of the first spring (19) is fixedly connected with one side of the buffer pad (36).

7. A beam balance double stroke pumping unit according to claim 1, characterized in that, One side of the fixed box (11) is provided with a sliding groove (29), one side of the third counterweight box (15) is fixedly connected with a sliding block (27), one end of the sliding block (27) away from the third counterweight box (15) is slidably connected with the inside of the sliding groove (29), one side of the sliding block (27) is fixedly connected with a pull rope (28).

8. A beam balance double stroke pumping unit according to claim 7, characterized in that, The bottom of the middle of the walking beam (9) is fixedly connected with a rotating shaft (30), the outside of the rotating shaft (30) is rotatably connected with the inside of the top of the support (6), one end of the rotating shaft (30) is fixedly connected with a rope collecting roller (31).

9. A beam balance double stroke pumping unit according to claim 8, characterised in that, One side of the top of the support (6) is fixedly connected with a connecting frame (32), one end of the connecting frame (32) is mounted with a pulley (33), one end of the pull rope (28) away from the sliding block (27) is fixedly connected with the outside of the rope collecting roller (31) through the outside of the pulley (33), when the horse head (10) moves downward, the rope collecting roller (31) winds the one end of the pull rope (28), the length of the pull rope (28) is adapted to the path length of the movement of the third counterweight box (15).

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