Balance adjustment device and oil pumping unit

Abstract

The present invention provides a balancing adjustment device and an oil pump. The balancing adjustment device includes: a connecting piece and a plurality of balancing blocks; a connecting head is provided at the upper end of the connecting piece for fixed connection with a transmission piece; a plurality of balancing blocks are snap-connected together in sequence from top to bottom, and the balancing block at the uppermost end is also snap-connected together with the lower end of the connecting piece. The balancing adjustment device and the oil pump of the present invention are snap-connected together with the balancing block at the uppermost end through the lower end of the connecting piece, and the plurality of balancing blocks are snap-connected together in sequence from top to bottom. The snap-connection realizes rapid adjustment of the balancing blocks, with short adjustment time and high efficiency, thus solving the technical problems of high labor intensity, long adjustment time and low efficiency for on-site workers in carrying balancing blocks. In addition, the balancing adjustment device can also be transported as a whole package with the oil pump to reduce transportation costs.

Description

Technical Field

[0001] The invention relates to the technical field of oil extraction, and in particular to a balancing adjustment device and an oil pumping unit. Background Art

[0002] During the oil collection process, after the oil well stops spraying, it is necessary to use a pump to suck out the oil in the well. Among them, direct pumping pumps are widely used in major oil fields because of their advantages such as large stroke, low energy consumption, and high efficiency. During the operation of the pump, the load is constantly changing, and there is a difference in the load of its up and down strokes, which leads to unstable output current of the motor and easily causes damage to the motor and other equipment. Therefore, a pumping unit balance block is generally provided on the pumping unit, and the purpose of balancing the load is achieved by increasing or decreasing the pumping unit balance block.

[0003] In the prior art, the balancing device includes a container and a plurality of balancing weights placed in the container, and a protective net is arranged outside. When the balancing weight needs to be adjusted, the protective net is opened, and the balancing weight is manually carried and placed in the container or taken out of the container and placed on the ground.

[0004] The general balance block weighs 30 kilograms. On-site operators have to carry it back and forth, which is not only labor-intensive and dangerous for operators and can easily cause personal injury, but also takes a long time to adjust, resulting in long downtime of the pump and low oil production efficiency. Summary of the invention

[0005] The invention provides a balancing adjustment device and an oil pumping unit to solve the technical problems of high labor intensity, long adjustment time and low efficiency for workers on site to carry balancing blocks.

[0006] The present invention provides a balance adjustment device, comprising: a connecting member and a plurality of balance blocks; the upper end of the connecting member is provided with a connecting head for fixedly connecting with a transmission member; the plurality of balance blocks are snap-connected together in sequence from top to bottom, and the balance block at the uppermost end is also snap-connected with the lower end of the connecting member.

[0007] As described above, the balancing adjustment device, wherein the lower end of the connecting member is provided with a snap ring, and the upper surface of each of the balancing blocks is provided with a buckle fixedly connected to the snap ring; the lower surface of each of the balancing blocks is provided with the snap ring; or, the lower end of the connecting member is provided with a buckle, and the upper surface of each of the balancing blocks is provided with a snap ring fixedly connected to the buckle; the lower surface of each of the balancing blocks is provided with the buckle.

[0008] As described above, the balance adjustment device, wherein the connecting member includes a top wall and a first side wall and a second side wall fixedly connected to the top wall and arranged opposite to each other; the connecting head is arranged on the top wall; the first side wall is provided with a plurality of first plug holes, which are arranged at intervals along the vertical direction; the second side wall is provided with a second plug hole at a position opposite to the first plug hole; a through hole is provided on each of the balancing blocks in a direction from the first side wall toward the second side wall; the balance adjustment device also includes a fixing pin; the fixing pin passes through the first plug hole, the through hole and the second plug hole in sequence to fix the balancing block to the connecting member.

[0009] The balance adjustment device as described above, wherein the through holes are multiple and are arranged at intervals along the lateral direction of the balance block.

[0010] In the balance adjustment device as described above, limit holes are provided at both ends of the fixing pin, and the limit pin is inserted into the limit holes.

[0011] As described above, the balancing and adjusting device, wherein the fixing pin is axially provided with a guide groove, and the corresponding through hole is axially provided with a guide protrusion matching with the guide groove; or, the fixing pin is axially provided with a guide protrusion, and the corresponding through hole is axially provided with a guide groove matching with the guide protrusion.

[0012] The balance adjustment device as described above, wherein the first side wall and / or the second side wall is provided with an indicating scale.

[0013] The balance adjustment device as described above, wherein, further comprises a support seat, wherein the support seat is arranged below the balance block located at the lowermost end, and is used for supporting the balance block.

[0014] As described above, the balancing adjustment device, wherein the upper surface of each balancing block is provided with a positioning protrusion; the lower surface of each balancing block is provided with a positioning groove, and the positioning protrusion of the balancing block located below cooperates with the positioning groove of the balancing block located above.

[0015] The present invention also provides an oil pumping unit, comprising: a transmission member, a sky sheave, a guide wheel, an oil tree and the balance adjustment device as described above; one end of the transmission member is connected to the connecting member of the balance adjustment device, and the other end bypasses the sky sheave and the guide wheel to be connected to the oil tree.

[0016] The balancing adjustment device and the oil pump of the present invention are connected together by snapping the lower end of the connecting piece with the uppermost balancing block, and a plurality of balancing blocks are snap-connected together in sequence from top to bottom. The snap-connection enables rapid adjustment of the balancing blocks, with short adjustment time and high efficiency, thus solving the technical problems of high labor intensity, long adjustment time and low efficiency in carrying balancing blocks by on-site workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the embodiments of the present invention will become more easily understood through the following detailed description with reference to the accompanying drawings, in which several embodiments of the present invention will be described by way of example and not limitation, wherein:

[0018] Figure 1 It is a structural schematic diagram of the balance adjustment device of the present invention;

[0019] Figure 2 for Figure 1 The structural diagram of the connecting parts;

[0020] Figure 3 for Figure 1 A cross-sectional view of multiple balancing blocks;

[0021] Figure 4 for Figure 3 Schematic diagram of the structure of a single balancing block;

[0022] Figure 5 A front view of an embodiment of a fixing pin of a balance adjustment device of the present invention;

[0023] Figure 6 A front view of another embodiment of a fixing pin of a balance adjustment device of the present invention;

[0024] Figure 7 for Figure 6 A-direction sectional view;

[0025] Figure 8 A cross-sectional view of another embodiment of a fixing pin of a balance adjustment device of the present invention;

[0026] Fig. 9 It is a structural schematic diagram of the oil pumping unit of the present invention.

[0027] Description of reference numerals:

[0028] 1: Transmission parts; 2: Connector;

[0029] 3: Connector; 4: First socket;

[0030] 5: indicating scale; 6: first side wall;

[0031] 7: third side wall; 8: second side wall;

[0032] 9: fourth side wall; 10: second plug hole;

[0033] 11: top wall; 12, 13, 14: balance blocks;

[0034] 15: through hole; 16: positioning protrusion;

[0035] 17: positioning groove; 18: supporting seat;

[0036] 19: fixing pin; 20: limiting hole;

[0037] 21: guide head; 22: guide groove;

[0038] 23: guide protrusion; 24: truss;

[0039] 25: Transmission parts; 26: Head wheel;

[0040] 27: guide wheel; 28: bare rod;

[0041] 29: Rope hanger; 30: Christmas tree. DETAILED DESCRIPTION

[0042] In the process of oil collection, after the oil well stops flowing, it is necessary to use a pump to suck out the oil in the oil well. According to the different structures and principles of the pump, the pump can be divided into beam pump and beamless pump.

[0043] The basic characteristics of the beam pumping unit are simple structure, easy manufacturing, convenient use, especially it can operate in the oil field for a long time all-weather, reliable use. The working principle of the beam pumping unit is that the power is supplied by the power machine, the high-speed rotation of the power machine is converted into the low-speed rotation of the pumping unit through the reducer, and the rotational motion is converted into the up and down reciprocating motion of the pumping unit head by the crank-connecting rod-beam mechanism, and the rope suspension assembly drives the deep well pump to work. The main components of the beam pumping unit are the power machine that provides power, the reducer that transmits power and reduces speed, the four-bar mechanism (crank, connecting rod, beam, bracket, crossbeam and base) that transmits power and converts rotational motion into reciprocating motion, the head and rope suspension assembly that transmit power and ensure the reciprocating linear motion of the light rod, the brake device that allows the pumping unit to stay at any position, and the balancing device that allows the power machine to work within a smaller load change range.

[0044] Beam pumping units can be divided into conventional beam pumping units, front beam pumping units, out-of-phase beam pumping units, and double-head beam pumping units according to different structural forms. Beam pumping units can be divided into beam balanced type, crank balanced type, compound balanced type, and pneumatic balanced type according to different balancing methods.

[0045] The beamless pumping unit includes chain pumping unit, steel rope pumping unit, hydraulic pumping unit, crank connecting rod pumping unit, etc. Among them, the working principle of the chain pumping unit is that the power machine supplies power, and the high-speed rotation of the power is converted into the low-speed rotation of the chain through the reducer, and the rotational motion is converted into the up and down reciprocating motion of the pumping unit shuttle frame by the special link and the main shaft pin-slider mechanism, and the deep well pump is driven to work by the suspension rope assembly passing around the crown wheel. It is mainly composed of power transmission system, reversing system, balance system, suspension system and frame base. The chain pumping unit has significant advantages such as compact structure, convenient balance adjustment, and long stroke, and is particularly suitable for application in large machines and offshore oil production platforms or from-type wells.

[0046] The working characteristic of the oil pump is to bear alternating loads. During the upstroke, the suspension load of the oil pump is the weight of the liquid acting on the effective section of the piston (including the pressure difference) and the weight of the sucker rod column in the liquid, as well as dynamic loads such as friction, inertia, and vibration; during the downstroke, the suspension load of the oil pump is the weight and dynamic load of the sucker rod column in the liquid. In addition, during the upstroke, the engine has to pay a lot of energy to lift the suspension load; during the downstroke, the sucker rod can fall by its own weight, not only does not require the engine to pay energy, but also does not work on the engine. Therefore, the load on the engine in the up and down strokes is uneven. The unevenness of the load seriously affects the efficiency and life of the four-bar mechanism, the reduction box and the engine, and also worsens the working conditions of the sucker rod, which significantly increases the number of sucker rod breakages.

[0047] Among them, direct pumping units are widely used in major oil fields due to their advantages such as large stroke, low energy consumption and high efficiency. During the operation of the pumping unit, the load is constantly changing, and there is a difference in the load of the up and down strokes, which leads to unstable motor output current and easily causes damage to the motor and other equipment. Therefore, the pumping unit is generally equipped with a pumping unit balance block, and the purpose of balancing the load is achieved by adding or removing the pumping unit balance block.

[0048] In the prior art, the balancing device includes a container and a plurality of balancing weights placed in the container, and a protective net is arranged outside. When the balancing weight needs to be adjusted, the protective net is opened, and the balancing weight is manually carried and placed in the container or taken out of the container and placed on the ground.

[0049] The general balance block weighs up to 30 kilograms. The on-site operators have to carry it back and forth, which is not only labor-intensive and dangerous, but also easy to cause personal injury. In addition, the back and forth adjustment time is long, resulting in long downtime of the pumping unit and low oil production efficiency. In addition, the balance block is placed outside the pumping unit body and is easy to lose. When transporting the pumping unit, the balance block needs to be transported separately from the pumping unit body, which has high transportation costs.

[0050] To this end, the present invention provides a balancing adjustment device and an oil pumping unit to solve the technical problems of high labor intensity, long adjustment time and low efficiency for on-site workers in carrying balancing blocks.

[0051] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and the present invention is not limited to the following specific embodiments.

[0052] First of all, it should be explained that in the present invention, the directional words "up" and "top" refer to the side away from the ground, and the directional words "down" and "bottom" refer to the side close to the ground; vertical refers to the direction perpendicular to the ground, that is, the Z direction in the accompanying drawings, where the X direction is horizontal and the Y direction is vertical.

[0053] Figure 1 It is a structural schematic diagram of the balance adjustment device of the present invention; Figure 2 for Figure 1 The structural diagram of the connecting parts; Figure 3 for Figure 1 A cross-sectional view of multiple balancing blocks; Figure 4 for Figure 3 Schematic diagram of the structure of a single balancing block; Figure 5 A front view of an embodiment of a fixing pin of a balance adjustment device of the present invention; Figure 6 A front view of another embodiment of a fixing pin of a balance adjustment device of the present invention; Figure 7 for Figure 6 A-direction sectional view; Figure 8 A cross-sectional view of another embodiment of a fixing pin of a balance adjustment device of the present invention; Fig. 9 It is a structural schematic diagram of the oil pumping unit of the present invention.

[0054] Reference Figures 1 to 9 The present embodiment provides a balance adjustment device, comprising: a connecting member 3 and a plurality of balance blocks 13; a connecting head 2 is provided at the upper end of the connecting member 3 for being fixedly connected to a transmission member 25; the plurality of balance blocks 13 are snap-connected together in sequence from top to bottom, and the balance block 12 at the uppermost end is also snap-connected with the lower end of the connecting member 3.

[0055] Specifically, the balance adjustment device includes a connector 3 and a plurality of balance blocks 13. The connector 3 may be a flat plate, with a connector 2 disposed on its upper surface for fixed connection with the transmission member 25, and a connection structure disposed on its lower surface for fixed connection with the uppermost balance block 12. The upper surface of each balance block 13 is provided with a structure matching the connection structure, and the lower surface is provided with a connection structure, and the plurality of balance blocks 13 are sequentially connected up and down. Alternatively, the connector 3 may also be a frame structure, with a connector 2 disposed on its top for fixed connection with the transmission member 25, and the plurality of balance blocks 13 are accommodated inside the frame and connected to the balance blocks 13 by buckles, hanging rings, etc. Alternatively, the connector 3 may also be a box structure, with a connector 2 disposed on its top for fixed connection with the transmission member 25, and the plurality of balance blocks 13 are accommodated inside the box and fixedly connected to the box. The specific form of the connector 3 is not limited here.

[0056] The upper end of the connector 3 is provided with a connector head 2 for fixed connection with the transmission member 25. The connector head 2 and the connector 3 are non-detachably fixedly connected, for example, by welding, integral casting, etc.; the connector head 2 and the connector 3 are detachably fixedly connected, for example, a stud is provided at the lower end of the connector head 2, and a threaded hole is provided at the upper end of the connector 3, and the fixed connection between the stud and the threaded hole is realized. The connector head 2 and the connector 3 are fixedly connected. The connector head 2 can be a clamping ring that is clamped with the transmission member 25, or the connector head 2 is a locking mechanism that locks the transmission member 25. The present invention does not limit the specific structure of the connector head 2, and it only needs to be able to achieve a fixed connection with the transmission member 25. Those skilled in the art can design it according to actual conditions.

[0057] In order to facilitate the rapid adjustment of the balancing block, a snap-fit ​​mechanism is provided on each balancing block 13 , and the multiple balancing blocks 13 are snap-fitted together in sequence from top to bottom, and the balancing block 12 at the top is also snap-fitted to the lower end of the connector 3 .

[0058] In some embodiments, the balancing block 12 at the top is also snap-connected to the bottom of the connector 3, and the balancing blocks 13 below are snap-connected to each other, snap-connected from top to bottom. For example, a hook is provided at the bottom of the connector 3, and a snap ring matching the hook is provided at the top of the balancing block 12, and the hook is snapped into the snap ring to achieve the connection between the balancing block 12 and the connector 3; a snap ring is provided at the bottom of the balancing block 12 at the top, which is connected to the hook at the top of the balancing block 13 below. Each balancing block 13 is consistent with the top balancing block 12, with a hook provided at the top and a snap ring provided at the bottom, snap-connected from top to bottom. The balancing blocks 13 are snapped in according to the number of balancing blocks required by the pumping unit, and the adjustment is simple and fast.

[0059] In other embodiments, the connector 3 is provided with a plurality of snap-fit ​​structures from top to bottom, and a plurality of balancing blocks 13 are provided in sequence from top to bottom, and are snap-fitted with the plurality of snap-fit ​​structures respectively. For example, the connector 3 is provided with a plurality of snap-fit ​​rings from top to bottom, and a plurality of balancing blocks 13 are provided with snap-fit ​​interfaces that match the snap-fit ​​rings, and the number of balancing blocks is adjusted by snapping each balancing block 13 with the connector 3. Alternatively, the connector 3 is provided with a plurality of jacks from top to bottom, and each balancing block 13 is provided with a through hole corresponding to the jack, and the snap-fitting of the plurality of balancing blocks 13 with the connector 3 is achieved by fixing pins.

[0060] It should be noted that, in this embodiment, the balancing block 13 and the connecting member 3 can be connected by means of snaps, snap rings, hooks, etc., or can be connected by means of snap holes, snap grooves, fixing pins, fixing protrusions, etc., and no specific limitation is made here.

[0061] The balance adjustment device provided in this embodiment is connected with the uppermost balance block by buckling the lower end of the connecting piece, and multiple balance blocks are buckled together from top to bottom in sequence. The buckle connection realizes rapid adjustment of the balance block, with short adjustment time and high efficiency, solving the technical problems of high labor intensity, long adjustment time and low efficiency for on-site workers to carry the balance block. In addition, the balance adjustment device can also be transported as a whole with the oil pump to reduce transportation costs.

[0062] As a clamping connection method between the connecting member 3 and the balancing block 13, a clamping ring is provided at the lower end of the connecting member 3, and a buckle fixedly connected to the clamping ring is provided on the upper surface of each balancing block 13; a clamping ring is provided on the lower surface of each balancing block 13; or, a buckle is provided at the lower end of the connecting member 3, and a buckle is provided on the upper surface of each balancing block 13; a buckle is provided on the lower surface of each balancing block 13.

[0063] Specifically, the connecting member 3 is fixedly connected to the uppermost balancing block 12 , and the plurality of balancing blocks 13 below are connected to each other in sequence up and down.

[0064] A snap ring is provided at the lower end of the connector 3; a buckle fixedly connected to the snap ring is provided on the upper surface of each balancing block 13; and a snap ring is provided on the lower surface of each balancing block 13. The snap ring at the lower end of the connector 3 is snapped with the buckle provided on the upper surface of the uppermost balancing block 12, the buckle provided on the upper surface of the balancing block 13 below is snapped with the snap ring provided on the lower surface of the balancing block 13 above it, and the snap ring provided on its lower surface is snapped with the buckle provided on the upper surface of the balancing block 13 below it. Multiple balancing blocks 13 are snapped up and down in sequence to achieve fixed connection between multiple balancing blocks 13 and the connector 3.

[0065] Alternatively, a buckle is provided at the lower end of the connector 3; a buckle fixedly connected to the buckle is provided on the upper surface of each balancing block 13; and a buckle is provided on the lower surface of each balancing block 13. The buckle at the lower end of the connector 3 is engaged with the buckle provided on the upper surface of the uppermost balancing block 12, the buckle provided on the upper surface of the balancing block 13 below is engaged with the buckle provided on the lower surface of the balancing block 13 above it, and the buckle provided on its lower surface is engaged with the buckle provided on the upper surface of the balancing block 13 below it, and multiple balancing blocks 13 are engaged in sequence from top to bottom, so that multiple balancing blocks 13 are fixedly connected to the connector 3.

[0066] It should be noted that in this embodiment, the buckle and the snap ring can be existing buckle and snap ring structures, and the present invention does not limit this. When the number of balancing blocks 13 needs to be increased or decreased, the connection between the balancing blocks 13 and the connecting member 3 can be quickly achieved through the buckle and the snap ring, which is convenient, fast and efficient to adjust.

[0067] As another clamping mode of the connecting member 3 and the balancing block 13, the connecting member 3 includes a top wall 11 and a first side wall 6 and a second side wall 8 fixedly connected to the top wall 11 and arranged opposite to each other; the connecting head 2 is arranged on the top wall 11; the first side wall 6 is provided with a plurality of first sockets 4, which are arranged at intervals along the vertical direction; the second side wall 8 is provided with a second socket 10 at a position opposite to the first socket 4; a through hole 15 is provided on each balancing block 13 along the direction of the first side wall 6 toward the second side wall 8; the balancing adjustment device also includes a fixing pin 19; the fixing pin 19 passes through the first socket 4, the through hole 15 and the second socket 10 in sequence to fix the balancing block 13 with the connecting member 3.

[0068] Specific reference Figures 1 to 4 The connecting member 3 is a box structure, including a top wall 11 and a first side wall 6, a second side wall 8, a third side wall 7, and a fourth side wall 9 fixedly connected to the top wall 11. The first side wall 6 is arranged opposite to the second side wall 8, the third side wall 7 is arranged opposite to the fourth side wall 9, and the top wall 11 and the first side wall 6, the second side wall 8, the third side wall 7, and the fourth side wall 9 form a receiving space, that is, an inverted box, and the receiving space is used to accommodate multiple balancing weights 13. Of course, the first side wall 6, the second side wall 8, the third side wall 7, and the fourth side wall 9 can form a square box structure or a cylindrical barrel structure, and the receiving space can accommodate the balancing weight 13, and the present invention does not limit this.

[0069] The connector 2 is arranged on the upper surface of the top wall 11, and the connector 2 and the top wall 11 can be detachably fixedly connected, such as screwed or snapped, etc.; the connector 2 and the top wall 11 can also be non-detachably fixedly connected, such as welded or integrally formed.

[0070] The first side wall 6 is provided with a plurality of first plug holes 4, which are arranged at intervals in the vertical direction; the second side wall 8 is provided with a second plug hole 10 at a position opposite to the first plug hole 4; and each balancing block 13 is provided with a through hole 15 in the direction from the first side wall 6 to the second side wall 8. One through hole 15 can be provided on each balancing block 13, so the first plug hole 4 and the second plug hole 10 are evenly spaced in the vertical direction, and the interval is the thickness of the balancing block 13. Multiple through holes can also be provided on each balancing block 13, for example, two, three, etc., and the multiple through holes 13 can be spaced in the vertical direction, and / or, the multiple through holes 13 can be spaced in the horizontal direction. Accordingly, the number and arrangement of the first plug hole 4 and the second plug hole 10 correspond to the number and arrangement of the through holes 13 of the balancing block 3. In addition, the through hole 13 can be a circular hole, an elliptical hole, a polygonal hole or a hole of an irregular shape, for example, the through hole 13 is a square hole extending in the horizontal direction. Accordingly, the shape of the first plug hole 4 and the second plug hole 10 is consistent with the shape of the through hole 13. It should be noted that the first plug hole 4 may also be provided on the third side wall 7 , and the corresponding second plug hole 10 may be provided on the fourth side wall 9 opposite to the third side wall 7 .

[0071] The balance adjustment device further includes a fixing pin 19; the cross section of the fixing pin 19 may be circular, elliptical, polygonal or irregular, etc., which is not limited here. Preferably, the shape of the fixing pin 19 is consistent with the shape of the first plug hole 4, the through hole 15 and the second plug hole 10. The fixing pin 19 passes through the first plug hole 4, the through hole 15 and the second plug hole 10 in sequence to fix the balancing weight 13 to the connecting member 3. When the number of balancing weights 13 needs to be increased or decreased, the number of balancing weights 13 can be quickly adjusted by inserting or pulling out the fixing pin 19, which is efficient.

[0072] Furthermore, in order to enhance the stability of the connection, there are multiple through holes 15 , for example, two, three, etc., which are arranged at intervals along the lateral direction of the balancing block 13 .

[0073] During the oil pumping process, vibrations are inevitable. In order to prevent the fixing pin 19 from coming out of the first plug hole 4, the second plug hole 10 and the through hole 15 due to vibrations, causing safety accidents, refer to Figure 5 and Figure 6 In this embodiment, both ends of the fixing pin 19 are provided with limiting holes 20 , and limiting pins (not shown) are inserted into the limiting holes 20 .

[0074] Specifically, a stopper and a stopper fixedly connected to the stopper are provided at the upper end of the stopper pin 20. The stopper is inserted into the stopper hole 20, and the stopper is located outside the stopper hole 20, and can be a circular ring. The stopper can also be a crossbar perpendicular to the stopper, and the present invention does not limit this.

[0075] Of course, in order to prevent the fixing pin 19 from being displaced during operation and causing safety accidents, the fixing pin 19 can also be provided with an external thread, which cooperates with the internal threads provided in the first socket 4, the through hole 15 and the second socket 10 to prevent the fixing pin 19 from moving while achieving the connection.

[0076] In addition, in order to facilitate the insertion of the fixing pin 19 into the first insertion hole 4, the through hole 15 and the second insertion hole 10, guide heads 21 are provided at both ends of the fixing pin 19, and the guide heads 21 are tapered.

[0077] Furthermore, the fixing pin 19 is axially provided with a guide groove 22, and the corresponding through hole 15 is axially provided with a guide protrusion matching with the guide groove 22; or, the fixing pin 19 is axially provided with a guide protrusion 23, and the corresponding through hole 15 is axially provided with a guide groove matching with the guide protrusion 23.

[0078] In order to prevent the fixing pin 19 from tilting, rubbing against the hole wall, and being blocked during the insertion of the fixing pin 19 into the first plug hole 4, the through hole 15, and the second plug hole 10, a guide groove 22 is axially arranged on the fixing pin 19, and a guide protrusion matching with the guide groove 22 is axially arranged in the corresponding through hole 15 and / or the first plug hole 4, and the second plug hole 10. Through the mutual cooperation between the guide groove 22 and the guide protrusion, the fixing pin 19 is guided to be quickly inserted into the first plug hole 4, the through hole 15, and the second plug hole 10. The guide groove 22 can be provided in one or more forms, and can be arranged at intervals along the circumference of the fixing pin 19. The cross section of the guide groove 22 can be an arc, a polygon, or an irregular shape, etc., which is not limited here.

[0079] Alternatively, the fixing pin 19 is provided with a guide protrusion 23 along the axial direction, and a guide groove matching with the guide protrusion 23 is provided in the corresponding through hole 15 and / or the first plug hole 4 and the second plug hole 10 along the axial direction, and the fixing pin 19 is guided to be quickly inserted into the first plug hole 4, the through hole 15 and the second plug hole 10 through the mutual cooperation between the guide groove and the guide protrusion 23. One or more guide protrusions 23 may be provided, and they may be provided at intervals along the circumference of the fixing pin 19. The cross section of the guide protrusion 23 may be an arc, a polygon, or an irregular shape, etc., which is not limited here.

[0080] The first side wall 6 and / or the second side wall 8 is provided with an indicating scale 5 for indicating the number of the balancing weights 13. When adjusting on site, no operation or calculation is required, and the total weight of the current balancing weights can be displayed intuitively.

[0081] Reference Figure 3 On the basis of the above embodiment, the balance adjustment device of this embodiment further includes a support seat 18 , which is arranged below the balance block 14 at the lower end and is used to support the balance block 13 .

[0082] Continue to refer to Figure 3 and Figure 4 A positioning protrusion 16 is provided on the upper surface of each balancing block 13 , and a positioning groove 17 is provided on the lower surface of each balancing block 13 ; the positioning protrusion 16 of the balancing block 13 located below cooperates with the positioning groove 17 of the balancing block 13 located above.

[0083] Specifically, in order to align each balancing block 13 with each other, facilitate the insertion of the fixing pin 19, and avoid adjusting the position of the balancing block 13 when inserting the fixing pin 19, a positioning protrusion 16 is provided on the upper surface of each balancing block 13, and a positioning groove 17 is provided on the lower surface of each balancing block 13; the positioning of multiple balancing blocks 13 is achieved by cooperating between the positioning protrusion 16 of the balancing block 13 located below and the positioning groove 17 of the balancing block 13 located above. Among them, the upper surface of the balancing block 12 located at the uppermost end may not need to be provided with the positioning protrusion 16, and the lower surface of the balancing block 14 located at the lowermost end may not need to be provided with the positioning groove 17. In addition, the cross-sectional shape of the positioning protrusion 16 and the positioning groove 17 may be circular, arc-shaped, or conical, polygonal, or irregular, etc., and the present invention does not limit this.

[0084] The present embodiment further provides an oil pumping unit, comprising: a transmission member 25, a sheave 26, a guide wheel 27, an oil production tree 30 and a balance adjustment device; one end of the transmission member 25 is connected to the connecting member 3 of the balance adjustment device, and the other end bypasses the sheave 26 and the guide wheel 27 to be connected to the oil production tree 30.

[0085] Specifically, the balance adjustment device includes: a connecting member 3 and a plurality of balance blocks 13; a connecting head 2 is provided at the upper end of the connecting member 3 for fixed connection with the transmission member 25; the plurality of balance blocks 13 are snap-connected together from top to bottom, and the balance block 12 at the uppermost end is also snap-connected with the lower end of the connecting member 3. The structure, function and effect of the balance adjustment device provided in this embodiment are the same as those in the above embodiment, and the above embodiment can be referred to for details, and no further description is given here.

[0086] The transmission member 25 can be a conveyor belt, such as a belt, and the transmission member 25 can also be a wire rope, a chain, etc. The pumping unit also includes a truss 24, a bare rod 28, and a rope hanger 29; the balance adjustment device is arranged in the truss 24, the sheave 26 is installed at the upper end of the truss 24, one end of the transmission member 25 is connected to the connecting member 3 of the balance adjustment device, and the other end bypasses the sheave 26 and the guide wheel 27 to connect to the bare rod 28 and the rope hanger 29 in sequence, and then connects to the Christmas tree 30. Among them, the sheave 26, the guide wheel 27, the bare rod 28, the rope hanger 29 and the Christmas tree 30 can be existing structures, and the present invention is not limited to this.

[0087] The oil pumping unit provided in this embodiment has a balance adjustment device that is buckled and connected to the uppermost balance block through the lower end of the connecting piece, and multiple balance blocks are buckled and connected together in sequence from top to bottom. The buckle connection enables rapid adjustment of the balance blocks, with short adjustment time and high efficiency, solving the technical problems of high labor intensity, long adjustment time and low efficiency for on-site workers to carry balance blocks. In addition, the balance adjustment device can be transported as a whole with the oil pumping unit to reduce transportation costs.

[0088] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] In the above description, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A balancing and adjusting device for an oil pump, characterized in that: include: Connecting parts and a plurality of balancing weights; The upper end of the connecting member is provided with a connecting head for fixedly connecting with the transmission member; The plurality of balancing blocks are snap-connected together in sequence from top to bottom, and the balancing block at the top is also snap-connected to the lower end of the connecting piece; The connecting member includes a top wall and a first side wall and a second side wall fixedly connected to the top wall and arranged opposite to each other; The connector is arranged on the top wall; The first side wall is provided with a plurality of first plug holes, which are arranged vertically at intervals; the second side wall is provided with a second plug hole at a position opposite to the first plug hole; A through hole is formed on each of the balancing blocks along the first side wall toward the second side wall; The balance adjustment device also includes a fixing pin; The fixing pin passes through the first plug hole, the through hole and the second plug hole in sequence, so that the balancing weight is fixedly connected to the connecting member; The upper surface of each balancing block is provided with a positioning protrusion; the lower surface of each balancing block is provided with a positioning groove, and the positioning protrusion of the balancing block located below cooperates with the positioning groove of the balancing block located above.

2. The balance adjustment device for the oil pumping unit according to claim 1, characterized in that: There are a plurality of through holes, which are arranged at intervals along the lateral direction of the balancing block.

3. The balance adjustment device for the oil pumping unit according to claim 1, characterized in that: The two ends of the fixing pin are provided with limiting holes, and the limiting pin is inserted into the limiting holes.

4. The balance adjustment device for an oil pumping unit according to claim 1, characterized in that: The fixing pin is provided with a guide groove along the axial direction, and the corresponding through hole is provided with a guide protrusion matching with the guide groove along the axial direction; Alternatively, the fixing pin is provided with a guide protrusion along the axial direction, and the corresponding through hole is provided with a guide groove matching with the guide protrusion along the axial direction.

5. The balance adjustment device for the oil pumping unit according to claim 1, characterized in that: The first side wall and / or the second side wall are provided with indicating scales.

6. The balance adjustment device for an oil pumping unit according to claim 1 or 2, characterized in that: It also includes a support base, which is arranged below the balancing block at the lower end and is used to support the balancing block.

7. A pumping unit, characterized in that: include: A transmission member, a crown wheel, a guide wheel, a Christmas tree, and a pumping unit balancing and adjusting device according to any one of claims 1 to 6; One end of the transmission member is connected to the connecting member of the balance adjustment device, and the other end bypasses the sky wheel and the guide wheel to be connected to the Christmas tree.

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