Walking-beam-free mechanical reversing type oil pumping unit

Abstract

The invention discloses a walking-beam-free mechanical reversing type oil pumping unit, and relates to the technical field of oil pumping units, the walking-beam-free mechanical reversing type oil pumping unit comprises a frame body, an upper platform assembly is fixedly installed on the top of the frame body, the upper platform assembly comprises a permanent magnet motor, and the output shaft end of the permanent magnet motor is in driving connection with a transmission roller through a reversing component; when the transmission shaft rotates clockwise, the transmission shaft drives the transmission drum to rotate through the belt pulley, the transmission shaft drives the sliding rod to displace, the sliding rod drives the reversing shaft to slide and displace, the reversing shaft drives the sliding block to slide through the shifting fork rod, the sliding block abuts against the third gear disc after sliding, and the permanent magnet motor drives the third gear disc to rotate. The third gear disc drives the transmission shaft to rotate anticlockwise, and the transmission shaft rotates anticlockwise and drives the transmission roller to rotate in a reversing mode through the belt wheel. According to the mode, chain transmission is not adopted, an electric control system is not adopted to implement reversing, the purposes of reducing energy consumption and avoiding reduction of reversing precision are achieved, and potential safety hazards existing in long-term operation are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of oil pumping units, and more particularly to the technical field of beamless oil pumping units, in particular to a beamless mechanical reversing oil pumping unit. Background Art

[0002] The current mainstream types of beamless pumping units are divided into two categories: one is a mechanical reversing type pumping unit, and the other is an electronically controlled reversing type pumping unit.

[0003] Most mechanical reversing pumping units use a motor that rotates in one direction and a reversing structure driven by a mechanical chain. The chain reversing structure is large in size and has many auxiliary structures, resulting in great energy efficiency loss. In the published Chinese patent application, the publication number is CN212867509U, and the patent name is: A mechanical speed change mechanical reversing pumping unit, which achieves the purpose of mechanical reversing through the coordinated transmission of a transmission chain, a reducer, and a sky wheel. However, the existing technology has the problems of large size and many auxiliary mechanisms, resulting in large energy loss.

[0004] The electric control reversing pumping unit generally uses a motor connected to a reducer to drive the drum to transfer kinetic energy. The up and down movement of the pumping unit's bare rod relies on the frequent forward and reverse rotation of the motor. (The up and down reciprocating movement of the bare rod of a general walking beam pumping unit is 3-5 times per minute, and the up and down reciprocating movement of the bare rod of a non-walking beam pumping unit is 0.5-3.5 times. The times mentioned here means one up and down movement per minute.) In the case of such frequent forward and reverse rotation, the stability, accuracy and service life of the electronic control system, motor and sensor components are greatly tested, and long-term operation of this kind brings certain safety hazards. In the published Chinese patent application, publication number: CN212642681U, patent name: a beamless electrically controlled commutation type oil pump. Although the electric control commutation of the oil pump can be achieved through the coordinated use of a low-speed permanent magnet outer rotor synchronous motor, a frequency converter, a controller, and a rotary encoder, the prior art has the above-mentioned problem, that is, the frequent forward and reverse rotation of the motor has a great impact on the stability, accuracy and service life of the electronic control system, the motor, and the sensor element, and there are safety hazards in long-term operation.

[0005] In summary, in order to solve the problems existing in the prior art (1. The use of mechanical chain transmission to achieve commutation causes huge energy consumption losses; 2. The electronic control system, motor, and sensor elements of the electronic control commutation have poor stability and gradually reduced accuracy, and there are safety hazards in long-term operation), this application is specially proposed to solve the problems. Summary of the invention

[0006] The purpose of the present invention is to provide a beamless mechanical reversing oil pumping unit to solve the problems existing in the above-mentioned prior art.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides a beamless mechanical reversing type oil pumping unit, comprising a frame, an upper platform assembly is fixedly installed on the top of the frame, the upper platform assembly comprises a permanent magnet motor, the output shaft end of the permanent magnet motor is drivingly connected to a transmission drum through a reversing component, a belt is wound around the transmission drum, one end of the belt is hoisted with a counterweight box through a sling, the other end of the belt is passed around a guide drum and a polished rod slip is arranged at the end thereof, a rope hanger is arranged below the polished rod slip, and the rope hanger hangs a wellhead device through a polished rod;

[0009] The reversing component comprises a housing, a transmission shaft is rotatably provided in the housing, a slider is sleeved on the transmission shaft and slidably connected thereto, a second gear plate and a third gear plate are rotatably connected on the transmission shaft and at both ends of the slider, the permanent magnet motor is respectively transmission-connected with the second gear plate and the third gear plate through the first gear plate, the transmission shaft is transmission-connected with the reversing shaft through a sliding rod, and the reversing shaft is slidably connected with the slider through a fork rod;

[0010] When in use, the permanent magnet motor is started through the control of the electric control box, the permanent magnet motor is started and drives the first gear plate to rotate, the first gear plate drives the second gear plate to rotate, the second gear plate drives the transmission shaft to rotate clockwise through the slider, when the transmission shaft rotates clockwise, the transmission shaft drives the transmission roller to rotate clockwise through the pulley; the transmission shaft drives the sliding rod to move, the sliding rod moves and drives the reversing shaft to slide, the reversing shaft drives the slider to slide on the transmission shaft through the fork rod, the slider abuts against the third gear plate after sliding, at this time The third gear plate is connected to the transmission shaft through the slider to form an interconnected whole. The permanent magnet motor drives the third gear plate to rotate through the first gear plate, and the third gear plate drives the transmission shaft to rotate counterclockwise. The transmission shaft rotates counterclockwise and drives the transmission drum to rotate counterclockwise through the pulley. When the permanent magnet motor continues to rotate unidirectionally, the reversing component continues to change direction, so that the transmission drum also rotates in forward and reverse directions. The transmission drum pulls the belt to reciprocate, and the counterweight box and the wellhead device hoisted at both ends of the belt reciprocate accordingly.

[0011] Preferably, the frame and the electric control box are mounted on a base, and the electric control box is electrically connected to the permanent magnet motor.

[0012] Preferably, a ladder is provided on the frame.

[0013] Preferably, the output shaft end of the permanent magnet motor is drivingly connected to the first gear plate via a coupling.

[0014] Preferably, one end of the transmission shaft passes through the housing and a small pulley is fixedly mounted on the end thereof, and the small pulley is transmission-connected to the large pulley of the transmission drum via a V-belt.

[0015] Preferably, both ends of the reversing shaft pass through the housing and are slidably connected thereto, a positioning groove is provided on the outer side wall of the middle part of the reversing shaft, two positioning rings are arranged at the positioning groove, the inner hole of the positioning ring cooperates with the outer diameter of the reversing shaft, two steel springs are set between the two positioning rings, the two steel springs are respectively located on both sides of the sliding rod, the positioning ring is provided with bolt holes, the bolt holes are installed with bolts, and are stuck in the positioning grooves, which are used to adjust the tightness of the steel springs to achieve the purpose of adjusting the reversing force; one end of the positioning groove is fixedly connected to two bosses, the two bosses are used to limit and hold one end of the fork rod, and when the reversing shaft slides, the two bosses move the fork rod to cause one end of the fork rod to deviate.

[0016] Preferably, the shift fork rod is mounted on the housing via a pin shaft, and is used to shift the slider to slide.

[0017] Preferably, the middle portion of the transmission shaft includes a threaded portion and a sliding portion, the sliding portion is provided with a plurality of spline grooves distributed along the axial direction, and two groups of positioning holes are provided on the sliding portion and between the spline grooves, and each group of positioning holes includes a first positioning hole and a second positioning hole.

[0018] Preferably, the slider is cylindrical, a pull groove is provided on the outer wall of the middle part of the slider, friction plates are provided on the side walls at both ends of the slider, the friction plates are respectively abutted against one side wall of the second gear plate and the third gear plate, a plurality of spline strips are axially provided on the inner wall of the slider, each spline strip cooperates with each spline groove, and a group of hexagonal glass bead bolts passing through the wall are respectively provided at both ends of the slider, and one end of a group of hexagonal glass bead bolts close to the central axis is located in a group of positioning holes.

[0019] Preferably, one end of the sliding rod is threadedly connected to the threaded portion, and the other end of the sliding rod is sleeved on the reversing shaft and is used to drive the reversing shaft to slide.

[0020] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0021] The beamless mechanical reversing oil pumping unit has a mechanical reversing effect through the coordinated arrangement of a permanent magnet motor, a reversing component, and a transmission roller. The permanent magnet motor starts and drives the first gear plate to rotate, the first gear plate drives the second gear plate to rotate, the second gear plate drives the transmission shaft to rotate clockwise through a slider, when the transmission shaft rotates clockwise, the transmission shaft drives the transmission roller to rotate through a pulley, the transmission shaft drives the sliding rod to move, the sliding rod moves and drives the reversing shaft to slide, the reversing shaft drives the slider to slide on the transmission shaft through a fork rod After sliding, the slider abuts against the third gear plate (the third gear plate is connected to the transmission shaft through the slider to form an integral body), the permanent magnet motor drives the third gear plate to rotate through the first gear plate, the third gear plate drives the transmission shaft to rotate counterclockwise, the transmission shaft rotates counterclockwise and drives the transmission roller to reverse rotation through the pulley; thereby, mechanical reversing is achieved without changing the direction of the permanent magnet motor. This method does not use chain drive or electronic control system to implement reversing, thereby achieving the purpose of reducing energy consumption and avoiding reduced reversing accuracy, and avoiding safety hazards in long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a front view structural schematic diagram of a beamless mechanical reversing oil pumping unit of the present invention;

[0024] Figure 2 It is a left-side structural schematic diagram of a beamless mechanical reversing oil pumping unit of the present invention;

[0025] Figure 3 It is a schematic diagram of the top view of the structure of the beamless mechanical reversing oil pumping unit of the present invention;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the driving drum of the beamless mechanical reversing oil pumping unit of the present invention;

[0027] Figure 5 It is a three-dimensional structural schematic diagram of a beamless mechanical commutation type oil pumping unit permanent magnet motor of the present invention;

[0028] Figure 6 It is a three-dimensional structural schematic diagram of the reversing component of the beamless mechanical reversing oil pumping unit of the present invention;

[0029] Figure 7 It is a cross-sectional structural schematic diagram of the reversing component of the beamless mechanical reversing oil pumping unit of the present invention;

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the slide block of the beamless mechanical reversing oil pumping unit of the present invention;

[0031] Fig. 9 It is a cross-sectional structural schematic diagram of a slide block of a beamless mechanical reversing oil pumping unit of the present invention;

[0032] Fig.10 It is a three-dimensional structural schematic diagram of the reversing shaft of the beamless mechanical reversing oil pumping unit of the present invention;

[0033] Fig.11 It is a schematic diagram of the three-dimensional structure of the transmission shaft of the beamless mechanical reversing oil pumping unit of the present invention;

[0034] Fig.12 It is a front view structural schematic diagram of the transmission shaft of the beamless mechanical reversing oil pumping unit of the present invention;

[0035] Fig.13 The present invention is a schematic cross-sectional view of the hexagonal glass ball bolt of the beamless mechanical reversing oil pumping unit.

[0036] In the figure: 1, frame; 2, base; 3, counterweight box; 4, electric control box; 5, foundation; 6, reversing component; 601, small pulley; 602, housing; 603, transmission shaft; 6031, sliding part; 60311, first positioning hole; 60312, second positioning hole; 60313, spline groove; 6032, threaded part; 604, sliding rod; 605, steel spring; 606, second gear plate; 607, first gear plate; 608, third gear plate; 609, slider; 6091, Hexagon socket glass ball bolt; 6092, shift groove; 6093, spline strip; 6094, friction plate; 611, reversing shaft; 6111, positioning groove; 6112, boss; 6113, positioning ring; 612, shift fork rod; 7, coupling; 8, permanent magnet motor; 9, upper platform assembly; 10, V-belt; 11, transmission drum; 1101, large pulley; 12, belt; 13, guide drum; 14, wellhead assembly; 15, bare rod slip; 16, rope hanger; 17, bare rod; 18, ladder. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The purpose of the present invention is to provide a beamless mechanical reversing oil pumping unit to solve the problems existing in the prior art.

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Embodiment 1:

[0041] See also Figures 1 to 13 The present invention provides a technical solution: a beamless mechanical reversing type oil pumping unit, comprising a frame 1, an upper platform assembly 9 is fixedly mounted on the frame 1, a driving drum 11, a permanent magnet motor 8 and a guide drum 13 are respectively fixedly mounted on the upper platform assembly 9, a reversing component 6 is arranged at the output shaft end of the permanent magnet motor 8, and the permanent magnet motor 8 is drivingly connected to the driving drum 11 through the reversing component 6. The reversing component 6 comprises a housing 602, a transmission shaft 603, a sliding rod 604, a first gear plate 607, a slider 609, a reversing shaft 611, and a fork rod 612, the slider 609 is sleeved on the transmission shaft 603, and the transmission shaft 603 and the two ends of the slider 609 are respectively rotatably connected with a second gear plate 606 and a third gear plate 608, the first gear plate 607 is fixedly mounted on the output shaft end of the permanent magnet motor 8, and the permanent magnet motor 8 is drivingly connected to the second gear plate 606 and the third gear plate 608 through the first gear plate 607. The reversing shaft 611 is installed on the housing 602 , the transmission shaft 603 is transmission-connected to the reversing shaft 611 via the sliding rod 604 , and the reversing shaft 611 is slidingly connected to the sliding block 609 via the shift fork rod 612 .

[0042] Among them, the permanent magnet motor 8 starts and drives the first gear plate 607 to rotate (a coupling 7 is arranged between the permanent magnet motor 8 and the first gear plate 607), the first gear plate 607 drives the second gear plate 606 to rotate, and the second gear plate 606 drives the transmission shaft 603 to rotate clockwise through the slider 609.

[0043] When the transmission shaft 603 rotates clockwise, (i) the transmission shaft 603 drives the transmission drum 11 to rotate clockwise through the pulleys (referring to the V-belt 10, the small pulley 601, and the large pulley 1101); (ii) the transmission shaft 603 drives the sliding rod 604 to move, the sliding rod 604 moves and drives the reversing shaft 611 to slide, the reversing shaft 611 drives the slider 609 to slide on the transmission shaft 603 through the fork rod 612, and the slider 609 abuts against the third gear plate 608 after sliding (the third gear plate 608 and the transmission shaft 603 form an interconnected whole through the slider 609), the permanent magnet motor 8 drives the third gear plate 608 to rotate through the first gear plate 607, and the third gear plate 608 drives the transmission shaft 603 to rotate counterclockwise, the transmission shaft 603 rotates counterclockwise and drives the transmission drum 11 to rotate counterclockwise through the pulley.

[0044] Thus, mechanical commutation is achieved without changing the rotation direction of the permanent magnet motor 8. This method does not use chain transmission or an electronic control system to implement commutation, thereby achieving the purpose of reducing energy consumption and avoiding reduced commutation accuracy, and avoiding safety hazards in long-term operation.

[0045] Specifically, the two ends of the transmission shaft 603 are rotatably connected with the housing 602, the middle part of the transmission shaft 603 includes a threaded portion 6032 and a sliding portion 6031, and the slider 609 is sleeved on the sliding portion 6031 of the transmission shaft 603 and is slidably connected thereto. The two ends of the reversing shaft 611 penetrate the housing 602 and are slidably connected thereto, that is, the reversing shaft 611 can slide on the housing 602 along the axial direction. The fork rod 612 is installed on the housing 602 through a pin shaft, and the fork rod 612 is used to drive the slider 609 to slide. One end of the sliding rod 604 is threadedly connected with the threaded portion 6032 of the transmission shaft 603, and the other end of the sliding rod 604 is sleeved on the reversing shaft 611 and is used to drive the reversing shaft 611 to slide. The first gear plate 607 is meshed with the second gear plate 606 and the third gear plate 608 respectively.

[0046] The slider 609 is on the sliding portion 6031 of the transmission shaft 603 and can slide thereon. When the fork lever 612 rotates around the pin, the fork lever 612 pushes the slider 609 to slide on the sliding portion 6031 of the transmission shaft 603, thereby achieving the approach (or distance) of the slider 609 to the second gear plate 606 or the third gear plate 608. One end of the sliding rod 604 is threadedly connected to the threaded portion 6032 of the transmission shaft 603 (the thread of the threaded portion 6032 is a trapezoidal buckle structure). When the transmission shaft 603 rotates, the sliding rod 604 moves following the rotating thread, that is, the rotating transmission shaft 603 can drive the sliding rod 604 to move. When the sliding rod 604 is displaced, the sliding rod 604 drives the reversing shaft 611 to move, that is, drives the reversing shaft 611 to slide on the housing 602. When the reversing shaft 611 slides, it pushes one end of the fork rod 612 to deflect, and the other end of the fork rod 612 also deflects, and the fork rod 612 pushes the slider 609 to move, thereby realizing the slider 609 sliding on the transmission shaft 603. Among them, the first gear plate 607, the second gear plate 606, and the third gear plate 608 are all bevel gears. The sliding rod 604 moves left and right on the transmission shaft 603 through the forward and reverse rotation of the transmission shaft 603.

[0047] More specifically, a positioning groove 6111 is provided on the middle outer wall of the reversing shaft 611, two positioning rings 6113 are provided on the middle outer wall of the reversing shaft 611 and located at the positioning groove 6111, two steel springs 605 are sleeved on the outer wall of the reversing shaft 611 and located between the two positioning rings 6113, and the two steel springs 605 are respectively located on both sides of the sliding rod 604. Two bosses 6112 are fixedly connected to one end of the middle outer wall of the reversing shaft 611 and located at the positioning groove 6111, and the two bosses 6112 are used to limit and hold one end of the shift fork rod 612.

[0048] The inner hole of the positioning ring 6113 and the outer diameter of the reversing shaft 611 are matched with each other. The positioning ring 6113 is provided with a bolt hole, on which a bolt is installed and stuck in the positioning groove 6111 of the reversing shaft 611. The tightness of the steel spring 605 can be adjusted to achieve the purpose of adjusting the reversing force. When the reversing shaft 611 moves (slides), the two bosses 6112 shift the fork rod 612, causing one end of the fork rod 612 to deviate.

[0049] More specifically, a plurality of axially distributed spline grooves 60313 are provided on the sliding portion 6031 of the transmission shaft 603 , and two groups of positioning holes are provided on the sliding portion 6031 of the transmission shaft 603 and between each spline groove 60313 , and each group of positioning holes includes a first positioning hole 60311 and a second positioning hole 60312 .

[0050] The sliding portion 6031 is provided with a plurality of spline grooves 60313 to facilitate the sliding of the slider 609. The two groups of positioning holes are used to cooperate with the hexagonal glass ball bolts 6091 on the slider 609.

[0051] More specifically, the slider 609 is cylindrical, and a shifting groove 6092 is provided on the middle outer wall of the slider 609. Friction plates 6094 are provided on the side walls at both ends of the slider 609. The friction plates 6094 at both ends of the slider 609 are respectively abutted against one side wall of the second gear plate 606 and the third gear plate 608. A plurality of spline strips 6093 are axially provided on the inner wall of the slider 609, and each spline strip 6093 cooperates with each spline groove 60313. A group of hexagonal glass bead bolts 6091 passing through the wall are respectively provided at both ends of the slider 609, and one end of a group of hexagonal glass bead bolts 6091 close to the central axis is located in a group of positioning holes.

[0052] Among them, one end of the fork rod 612 is located in the shifting groove 6092 of the slider 609. When one end of the fork rod 612 is offset, the fork rod 612 pushes the slider 609 to slide. The outer wall of the transmission shaft 603 and the two ends of the sliding part 6031 are provided with bearing positions, and the outer wall of the transmission shaft 603 and the bearing positions are respectively rotatably connected with the second gear plate 606 and the third gear plate 608. The two groups of hexagonal glass bead bolts 6091 on the slider 609 match the two groups of positioning holes on the transmission shaft 603. A spring is provided inside the hexagonal glass bead bolt 6091, and a ball is provided at the end of the hexagonal glass bead bolt 6091 and on one side of the spring, and the ball can be limited and stuck in the positioning hole. The friction plate 6094 is used to abut the slider 609 against the side wall of the second gear plate 606 and the third gear plate 608. When the second gear plate 606 abuts against the friction plate 6094 of the slider 609, the second gear plate 606 rotates to drive the slider 609 to rotate, and the rotation of the slider 609 drives the transmission shaft 603 to rotate. At this time, since the slider 609 does not abut against the third gear plate 608, although the third gear plate 608 is meshed with the first gear plate 607, the third gear plate 608 cannot drive the transmission shaft 603. The friction plate 6094 does not only refer to a brake sheet material that has a friction effect, but also refers to a component that enables the slider 609 to be fastened and clamped with the second gear plate 606 and the third gear plate 608.

[0053] More specifically, one end of the transmission shaft 603 passes through the housing 602 and a small pulley 601 is fixedly mounted on its end. The small pulley 601 is connected to a large pulley 1101 of the transmission drum 11 through a V-belt 10 (multiple V-belts).

[0054] Among them, after the permanent magnet motor 8 is started, it drives the transmission shaft 603 to rotate, the transmission shaft 603 drives the small pulley 601 to rotate, the small pulley 601 drives the large pulley 1101 to rotate through the V-belt, and the large pulley 1101 rotates and drives the transmission drum 11 to rotate.

[0055] Specifically, a belt 12 is wound around the driving drum 11, one end of the belt 12 is hoisted with the counterweight box 3 through a sling, the other end of the belt 12 is passed around the guide drum 13 and a polished rod slip 15 is arranged at its end, a rope hanger 16 is arranged below the polished rod slip 15, a polished rod 17 is arranged on the rope hanger 16, and the polished rod 17 is used to hang the wellhead device 14 (referring to equipment such as oil production machines). The driving drum 11 rotates and drives the belt 12 to move.

[0056] Specifically, the beamless mechanical commutation pumping unit further includes a base 2, a frame 1 is mounted on the base 2, an electric control box 4 is arranged on the base 2, the electric control box 4 is electrically connected to the permanent magnet motor 8, and a ladder 18 is arranged on the frame 1. The base 2 is arranged on a foundation 5 in the oil production area. The electric control box 4 is used to control the start and stop of the permanent magnet motor 8. The permanent magnet motor 8 uses an HLM02D motor.

[0057] When in use: 1. Start the permanent magnet motor 8 through the electric control box 4. The permanent magnet motor 8 starts and drives the first gear plate 607 to rotate.

[0058] 2. The first gear plate 607 drives the second gear plate 606 to rotate, and the second gear plate 606 drives the transmission shaft 603 to rotate clockwise through the slider 609.

[0059] When the transmission shaft 603 rotates clockwise, (i) the transmission shaft 603 drives the transmission roller 11 to rotate clockwise through the pulleys (referring to the V-belt 10, the small pulley 601, and the large pulley 1101); (ii) the transmission shaft 603 drives the sliding rod 604 to move, and the sliding rod 604 moves and drives the reversing shaft 611 to slide, and the reversing shaft 611 drives the slider 609 to slide on the transmission shaft 603 through the fork rod 612 (when the slider 609 slides on the transmission shaft 603, the ball of the hexagonal glass ball bolt 6091 on the slider 609 will be moved by the first positioning hole 612. 0311 slides into the second positioning hole 60312, or slides from the second positioning hole 60312 into the first positioning hole 60311), the slider 609 slides and contacts the third gear plate 608 (the third gear plate 608 forms a mutually connected whole with the transmission shaft 603 through the slider 609), the permanent magnet motor 8 drives the third gear plate 608 to rotate through the first gear plate 607, and the third gear plate 608 drives the transmission shaft 603 to rotate counterclockwise, and the transmission shaft 603 rotates counterclockwise and drives the transmission roller 11 to rotate counterclockwise through the pulley. When the permanent magnet motor 8 continues to rotate unidirectionally, the reversing component 6 continues to change direction, so that the transmission roller 11 also realizes the rotation in the positive and negative directions.

[0060] 3. The driving drum 11 rotates in both directions, and the driving drum 11 pulls the belt 12 to do reciprocating motion. The counterweight box 3 and the wellhead device hoisted at both ends of the belt 12 also do reciprocating motion.

[0061] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. Beamless mechanical reversing pumping unit, characterized by: The utility model comprises a frame (1), an upper platform assembly (9) is fixedly mounted on the top of the frame (1), the upper platform assembly (9) comprises a permanent magnet motor (8), the output shaft end of the permanent magnet motor (8) is connected to a driving roller (11) through a reversing component (6), a belt (12) is wound around the driving roller (11), one end of the belt (12) is hoisted with a counterweight box (3) through a sling, the other end of the belt (12) passes around a guide roller (13) and a polished rod slip (15) is arranged at the end thereof, a rope hanger (16) is arranged below the polished rod slip (15), and the rope hanger (16) hangs a wellhead device (14) through a polished rod (17); The reversing component (6) comprises a housing (602), a transmission shaft (603) is rotatably provided in the housing (602), a slider (609) is sleeved on the transmission shaft (603) and is slidably connected thereto, a second gear plate (606) and a third gear plate (608) are rotatably connected on the transmission shaft (603) and at two ends of the slider (609), the permanent magnet motor (8) is respectively transmission-connected to the second gear plate (606) and the third gear plate (608) via a first gear plate (607), the transmission shaft (603) is transmission-connected to a reversing shaft (611) via a sliding rod (604), and the reversing shaft (611) is slidably connected to the slider (609) via a shift fork rod (612); When in use, the permanent magnet motor (8) is started by controlling the electric control box (4), the permanent magnet motor (8) is started and drives the first gear plate (607) to rotate, the first gear plate (607) drives the second gear plate (606) to rotate, the second gear plate (606) drives the transmission shaft (603) to rotate clockwise through the slider (609), when the transmission shaft (603) rotates clockwise, the transmission shaft (603) drives the transmission roller (11) to rotate clockwise through the pulley; the transmission shaft (603) drives the sliding rod (604) to move, the sliding rod (604) moves and drives the reversing shaft (611) to slide, the reversing shaft (611) drives the slider (609) to slide on the transmission shaft (603) through the fork rod (612), and the slider (609) slides and moves with the first gear plate (607) to rotate on the transmission shaft (607). The three gear plates (608) are in contact with each other. At this time, the third gear plate (608) and the transmission shaft (603) form an interconnected whole through the slider (609). The permanent magnet motor (8) drives the third gear plate (608) to rotate through the first gear plate (607). The third gear plate (608) drives the transmission shaft (603) to rotate counterclockwise. The transmission shaft (603) rotates counterclockwise and drives the transmission roller (11) to rotate counterclockwise through the pulley. When the permanent magnet motor (8) continues to rotate in one direction, the reversing component (6) continues to change direction, so that the transmission roller (11) also rotates in the forward and reverse directions. The transmission roller (11) pulls the belt (12) to make a reciprocating motion, and the counterweight box (3) and the wellhead device (14) hoisted at both ends of the belt (12) make a reciprocating motion accordingly.

2. The beamless mechanical reversing oil pumping unit according to claim 1, characterized in that: The frame (1) and the electric control box (4) are mounted on a base (2), and the electric control box (4) is electrically connected to the permanent magnet motor (8).

3. The beamless mechanical reversing oil pumping unit according to claim 1, characterized in that: The frame (1) is provided with a ladder (18).

4. The beamless mechanical reversing oil pumping unit according to claim 1, characterized in that: The output shaft end of the permanent magnet motor (8) is drivingly connected to the first gear plate (607) via a coupling (7).

5. The beamless mechanical reversing oil pumping unit according to claim 1, characterized in that: One end of the transmission shaft (603) passes through the housing (602) and a small pulley (601) is fixedly mounted on the end thereof. The small pulley (601) is connected to the large pulley (1101) of the transmission roller (11) through a V-belt (10).

6. The beamless mechanical reversing oil pumping unit according to claim 1, characterized in that: Both ends of the reversing shaft (611) pass through the housing (602) and are slidably connected thereto. A positioning groove (6111) is provided on the outer wall of the middle portion of the reversing shaft (611). Two positioning rings (6113) are provided at the positioning groove (6111). The inner holes of the positioning rings (6113) match the outer diameter of the reversing shaft (611). Two steel springs (605) are sleeved between the two positioning rings (6113). The two steel springs (605) are respectively located on both sides of the sliding rod (604). The positioning rings (6111) are provided with a plurality of springs (605). 13) is provided with a bolt hole, and a bolt is installed in the bolt hole and is stuck in the positioning groove (6111) for adjusting the tightness of the steel spring (605) to achieve the purpose of adjusting the reversing force; one end of the positioning groove (6111) is fixedly connected to two bosses (6112), and the two bosses (6112) are used to limit and hold one end of the fork rod (612). When the reversing shaft (611) slides, the two bosses (6112) move the fork rod (612) to cause one end of the fork rod (612) to deviate.

7. The beamless mechanical reversing oil pumping unit according to claim 6, characterized in that: The shift fork rod (612) is mounted on the housing (602) via a pin shaft and is used to shift the slider (609) to slide.

8. The beamless mechanical reversing oil pumping unit according to claim 7, characterized in that: The middle part of the transmission shaft (603) includes a threaded portion (6032) and a sliding portion (6031), and the sliding portion (6031) is provided with a plurality of spline grooves (60313) distributed along the axial direction, and two groups of positioning holes are provided on the sliding portion (6031) and between each of the spline grooves (60313), and each group of positioning holes includes a first positioning hole (60311) and a second positioning hole (60312).

9. The beamless mechanical reversing oil pumping unit according to claim 8, characterized in that: The slider (609) is cylindrical, and a push groove (6092) is provided on the outer wall of the middle part of the slider (609). Friction plates (6094) are provided on the side walls at both ends of the slider (609), and the friction plates (6094) are respectively abutted against the side walls of the second gear plate (606) and the third gear plate (608). The inner wall of the slider (609) is axially provided with a plurality of spline strips (6093), and each spline strip (6093) is matched with each spline groove (60313). A group of hexagonal glass bead bolts (6091) penetrating the wall are respectively provided at both ends of the slider (609), and one end of the hexagonal glass bead bolts (6091) close to the central axis is located in a group of positioning holes.

10. The beamless mechanical reversing oil pumping unit according to claim 8, characterized in that: One end of the sliding rod (604) is threadedly connected to the threaded portion (6032), and the other end of the sliding rod (604) is sleeved on the reversing shaft (611) and is used to drive the reversing shaft (611) to slide.

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