WO2022227017A1

WO2022227017A1 - Belt-type oil pumping machine with novel counterweight blocks

Info

Publication number: WO2022227017A1
Application number: PCT/CN2021/091549
Authority: WO
Inventors: 张聪; 宋洋洋; 谷玲玲
Original assignee: 德瑞石油装备（青岛）有限公司
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-11-03

Abstract

A belt-type oil pumping machine with novel counterweight blocks (1105), comprising a base (1), a drive motor (2) and a rack (3) being mounted in sequence on the base (1), a drive wheel (4), an upper sprocket (5), and a roller (6) being installed in the rack (3), the drive wheel (4) and the upper sprocket (5) being connected by means of a chain (8), a load belt (9) being sleeved on the roller (6), a shuttle frame (10) being connected to the other end of the load belt (9), a balance box (11) being mounted on the shuttle frame (10), the balance box (11) comprising a chassis (1101), a protective frame (1102) being mounted at the edge of the chassis (1101) to form a loading compartment (1103), a fixed pile (1104) being mounted in the loading compartment (1103), and counterweight blocks (1105) of different grades being mounted in the loading compartment (1103) to form different counterweight combinations in order to meet counterweight balance requirements.

Description

A belt pumping unit with a new type of counterweight

technical field

The invention relates to the technical field of pumping units, in particular to a belt-type pumping unit with a novel counterweight.

Background technique

As oil is widely used in all walks of life, the demand for oil is also increasing, so the demand for oil extraction equipment is also increasing. But the geology around the world is very different, so different performance requirements are put forward for oil production equipment.

The belt pumping unit has been widely used as a large stroke and low stroke pumping unit. Therefore, reducing the manufacturing cost of the belt-type pumping unit, improving the reliability of the belt-type pumping unit, and optimizing the design to make the operation simpler are the main topics of current research.

The balance system is mainly used to balance the load of the oil well and reduce the output power of the motor drive, so as to achieve the purpose of energy saving and high efficiency. Therefore, in the operation of the belt pumping unit, how to make the balance system better meet the working conditions of different oil wells is one of the main directions to improve the operating advantages of the pumping unit. In the prior art, the balance system of the belt pumping unit generally adopts the combination of the number of counterweight blocks to meet the needs of different oil well conditions, but under the existing technical conditions, the specifications of the counterweight blocks are determined and unchanged, so , in order to meet the balancing requirements, in practice it may often be necessary to load hundreds of balancing blocks to meet the balancing requirements. However, a large number of balance blocks greatly increase the workload of on-site installation and removal of the pumping unit, and it is also inconvenient for the maintenance and management of the pumping unit.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a belt-type pumping unit with a new type of counterweight to solve the technical problem in the prior art that a large number of counterweights lead to a large workload when the pumping unit is installed on site and removed when it is moved.

In order to solve the above-mentioned technical problems, the present invention specifically provides the following technical solutions:

A belt-type pumping unit with a new type of counterweight, comprising a base based on a tower base, a drive motor and a frame are sequentially installed on the base, and in the frame are sequentially fixedly installed from bottom to top The driving wheel, the upper sprocket and the drum, the drive motor and the driving wheel are connected by a reduction box to realize power transmission, and the driving wheel and the upper chain wheel are connected by a chain to form a power closed loop. A load belt is sleeved on the drum, the other end of the load belt is connected with a reciprocating frame arranged on the chain, and a balance box is installed on the reciprocating frame;

The balance box includes a bottom frame that is fixedly connected to the shuttle frame, a plurality of protective frames are fixedly installed on the edge of the bottom frame to form a loading room, and at least two fixing piles are fixedly installed in the loading room. In the loading room, counterweight blocks with different gradations are installed through fixed piles to form different counterweight combinations to meet the needs of counterweight balance.

Further, the counterweight blocks include at least six sequences, and the counterweight blocks of the various sequences are discretely increased in quality in sequence.

Further, set the sequence of the counterweight blocks as X ₁ , X ₂ , X ₃ ...... X _n respectively, and set the counterweight balance requirement as Y;

Then Y=a ₁ X ₁ +a ₂ X ₂ +a ₃ X ₃ +...+a _n X _n , where a ₁ , a ₂ , a ₃ ...... a _n The weight coefficient of the heavy block sequence, and a ₁ , a ₂ , a ₃ ...... a _n is 0 or a positive integer.

Further, set the counterweight balance demand interval of the same batch of pumping units as [0, U], then Y ∈ U, and set m X _k as the definite value according to the data relationship of Y ∈ U, where m represents the A constant for the number of weights in a sequence, k=1,2,3,...n.

Further, the reciprocating frame and the chain are connected by a crankshaft;

The crankshaft includes a central circular shaft and a displacement bearing fixedly installed on the edge of the central circular shaft at equal intervals. The central circular shaft is fixedly installed on the chain to obtain the power of the chain and follow the chain to run synchronously, so The displacement bearing is mounted on the reciprocating frame, and slides on the reciprocating frame when the displacement bearing is acted by an external force.

Further, a guide rail matched with the displacement bearing is installed on the reciprocating frame, the length of the guide rail is less than the width of the reciprocating frame, and both ends of the guide rail are provided with limiters for limiting the displacement bearing. stage, and the displacement bearing rolls in the guide rail.

Further, a plurality of limit frames for restricting the swinging of the reciprocating frame to both sides are fixedly installed on the frame along the movement direction of the chain. A roller for reducing the sliding resistance of the reciprocating frame is fixedly installed on the upper part.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can also be obtained according to the extension of the drawings provided without creative efforts.

1 is a schematic diagram of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a balance box in an embodiment of the present invention.

The symbols in the figure are as follows:

1-base; 2-with drive motor; 3-frame; 4-drive wheel; 5-upper sprocket; 6-roller; 7-reduction box; 8-chain; 9-load belt; 10-reciprocating frame; 11 -Balance box; 12-Crank shaft; 13-Limit frame;

1001-rail;

1101 - chassis; 1102 - protective frame; 1103 - into a loading room; 1104 - fixed pile; 1105 - counterweight block;

1201-center round shaft; 1202-displacement bearing.

Preferred Embodiments of the Invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1, the present invention provides a belt-type pumping unit with a new type of counterweight, including a base 1 based on a tower base, on which a drive motor 2 and a frame 3 are installed in sequence, A driving wheel 4, an upper sprocket 5 and a drum 6 are fixedly installed in the frame 3 in order from bottom to top, and the drive motor 2 and the driving wheel 4 are connected through a reduction box 7 to realize power transmission, so The driving wheel 4 and the upper sprocket 5 are connected by a chain 8 to form a power closed loop. A load belt 9 is sleeved on the drum 6, and the other end of the load belt 9 is connected with a chain 8. A balance box 11 is installed on the reciprocating frame 10 .

It should be noted that FIG. 1 only reflects the main structure of this embodiment, and other auxiliary structures are not marked, and the unmarked parts do not affect the technical solution under the common sense of the prior art. understand.

The reciprocating frame 10 and the chain 8 are connected by a crankshaft 12 . The crankshaft 12 includes a central circular shaft 1201 and a displacement bearing 1202 fixedly installed on the edge of the central circular shaft 1201 at equal intervals. The power follows the chain 8 to run synchronously, the displacement bearing 1202 is installed on the shuttle frame 10 , and the displacement bearing 1202 slides on the shuttle frame 10 when the external force acts.

In this embodiment, a guide rail 1001 matched with the displacement bearing 1202 is installed on the reciprocating frame 10 , the length of the guide rail 1001 is smaller than the width of the reciprocating frame 10 , and both ends of the guide rail 1001 are provided with a guide rail 1001 . The displacement bearing 1202 rolls in the guide rail 1001 in order to limit the limit stage of the displacement bearing 1202 .

Since the guide rail 1001 for the displacement bearing 1202 to move is provided on the reciprocating frame 10, the crankshaft 12 can move laterally on the reciprocating frame 10, that is, the lateral movement of the crankshaft 12 itself replaces the reciprocating frame 10 on the chain 8 Therefore, the balance box 11 driven by the shuttle frame 10 is prevented from moving laterally, so as to overcome the phenomenon such as shaking that may be caused when the chain is reversed in the prior art.

In the mechanical transmission, a small amount of shaking will cause great damage to the mechanical equipment in the long-term accumulation. Therefore, in this embodiment, according to the improvement of the balance box 11 itself, the structure of the reciprocating frame 10 is synchronously improved, so that the overall operation is improved. More smooth to avoid shaking and wear.

A movement channel 1002 for the reciprocating frame 10 to perform reciprocating movement is provided in the frame 3 , and guide rails 1003 for pulling the reciprocating frame 10 are provided on both sides of the movement channel 1002 . Traction frames 1004 are fixedly installed on both sides of the top and bottom of the bottom frame 1101 , and guide wheels 1005 matching the guide rails 1003 are fixedly installed on the traction frames 1004 . By arranging the traction frame 1004 and the guide rail 1003, the wear caused by the shaking of the shuttle frame 10 during the movement is reduced.

In this embodiment, since the movement of the reciprocating frame 10 in the lateral direction is restricted, the reciprocating frame 10 may be squeezed with the frame 1 to generate friction during reversing. A plurality of limit frames 101 are fixedly installed on the frame 1 along the movement direction of the chain 8 for restricting the reciprocating frame 10 from shaking to both sides. A roller to reduce the sliding resistance of the reciprocating frame 10 is fixedly installed on it. Due to the provision of rollers, friction caused by extrusion occurs between the reciprocating frame 10 and the frame 1 in time, and the relative extrusion and sliding are converted into rolling, thereby reducing wear and improving the service life of the machine.

As shown in FIG. 2 , the balance box 11 includes a bottom frame 1101 fixedly connected to the shuttle frame 10 , and a plurality of protective frames 1102 are fixedly installed on the edges of the bottom frame 1101 to form a loading room 1103 . The balancing blocks 1105 are placed in an orderly manner to meet the needs of counterweight balancing.

The specific way to achieve orderly placement is as follows: at least two fixing piles 1104 are fixedly installed in the loading room 1103, and counterweight blocks 1105 of different gradations are installed in the loading room 1103 through the fixing piles 1104 to form different Counterweight combination to meet counterweight balance needs.

The weights 1105 include at least six sequences, and the weights 1105 of the various sequences are discretely increased in quality. Let the sequence of the counterweight blocks 1105 be denoted as X ₁ , X ₂ , X ₃ ...... X _n respectively, and let the counterweight balance requirement be Y;

Then Y=a ₁ X ₁ +a ₂ X ₂ +a ₃ X ₃ +...+a _n X _n , where a ₁ , a ₂ , a ₃ ...... a _n The weight coefficient of the heavy block 1105 sequence, and a ₁ , a ₂ , a ₃ . . . a _n is 0 or a positive integer.

Assuming that the counterweight balance demand interval of the same batch of pumping units is [0, U], then Y∈U, and according to the data relationship of Y∈U, m X _k is set as the definite value, where m is a sequence distribution. Constant for the number of heavy blocks, k=1,2,3,...n.

The counterweight relationship in the present invention will be further described below in conjunction with specific embodiments:

Under the condition of setting the same counterweight balance requirement, 360 counterweight blocks of the same type need to be used in the prior art, and the mass of each counterweight block is set to be p. In practice, in order to ensure the accuracy of the counterweight requirement, There are requirements for the quality of a single counterweight, that is, neither too large nor too small. If the mass of a single counterweight is too large, it will affect the accuracy of the counterweight balance, making it difficult to achieve the required counterweight accuracy, while a single If the mass of the counterweight is too small, the number of counterweights will become larger. The large number of counterweights are too much work to disassemble when installing and moving machines on site.

Based on the aforementioned counterweight balance requirements, in this embodiment, instead of using the same specification of counterweight blocks, the counterweight blocks are divided into multiple specifications in sequence according to the counterweight balance requirements, such as 40p, 20p, 15p, 10p, 5p and p, where the multiple relationship of the counterweight should be flexibly determined according to the balance of the counterweight, rather than being fixed. That is, after adopting the method in this embodiment, under the premise of considering the convenience of loading the counterweight, it can be considered to be designed as 4 blocks of 40p, 4 blocks of 20p, 4 blocks of 15p, and 6 blocks of 10p, so that the number of counterweight blocks can be reduced. It is 4+4+4+6=18 blocks, which greatly reduces the number of counterweight blocks and achieves the workload of easy on-site installation and disassembly when moving the machine.

Of course, the above quantitative relationship of counterweights is not deterministic, and it is necessary to consider the difficulty of transportation and installation of large-mass counterweights, and then optimize the solution according to the requirements of counterweight balance (market application and data analysis, through multi-specification Counterweights are combined to meet different balance needs). Therefore, different balancing requirements can be met while reducing the number of balancing blocks.

For the counterweights in this embodiment, a casting method can be selected, and the casting cost and time cost are greatly reduced. In addition, due to the reduction in the number of counterweights, on-site management is also facilitated.

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

A belt-type oil pumping unit with a new type of counterweight, comprising a base (1) based on a tower base, on which a drive motor (2) and a frame (3) are installed in sequence, A driving wheel (4), an upper sprocket (5) and a roller (6) are fixedly installed in the frame (3) in sequence from bottom to top, and between the driving motor (2) and the driving wheel (4) The power transmission is realized through the connection of the reduction box (7), and the driving wheel (4) and the upper sprocket (5) are connected by a chain (8) to form a power closed loop, which is characterized in that: in the drum (6) The upper sleeve is provided with a load belt (9), the other end of the load belt (9) is connected with a reciprocating frame (10) arranged on the chain (8), and a balancer is installed on the reciprocating frame (10). box(11);

The balance box (11) includes a base frame (1101) fixedly connected to the shuttle frame (10), and a plurality of protective frames (1102) are fixedly installed on the edges of the base frame (1101) to form a loading room (1103) ), at least two fixed piles (1104) are fixedly installed in the loading room (1103), and counterweight blocks (1105) of different gradations are installed in the loading room (1103) through the fixed piles (1104). Different counterweight combinations are available to meet counterweight balance needs.
The belt-type pumping unit with a new type of counterweight according to claim 1, wherein the counterweight (1105) comprises at least six sequences, and the counterweights (1105) of multiple sequences The quality increases discretely in turn.
The belt-type pumping unit with a new type of counterweight according to claim 2, wherein the sequence of the counterweight (1105) is set as X 1 , X 2 , X 3 . . . ...X n , and let the counterweight balance requirement be Y; then Y=a 1 X 1 +a 2 X 2 +a 3 X 3 +...+a n X n , where a 1 , a 2 , a 3 ...an are the weight coefficients of each of the weight block (1105) sequences, and a1 , a2 , a3 ... an are 0 or positive integers.
A belt-type pumping unit with a new type of counterweight according to claim 1, characterized in that, if the balance demand interval of the same batch of pumping units is [0, U], then Y∈U, And according to the data relationship of Y∈U, m X k are set as definite values, where m is a constant representing the number of weight blocks in a sequence, k=1, 2, 3, ...... n.
The belt-type pumping unit with a new type of counterweight according to claim 1, characterized in that, the reciprocating frame (10) and the chain (8) are connected through a crankshaft (12);

The crankshaft (12) includes a central circular shaft (1201) and a displacement bearing (1202) fixedly installed on the edge of the central circular shaft (1201) at equal intervals, and the central circular shaft (1201) is fixedly installed on the The power of the chain (8) is obtained from the chain (8) to run synchronously with the chain (8), and the displacement bearing (1202) is installed on the reciprocating frame (10). When the displacement bearing (1202) is subjected to an external force It slides on the shuttle frame (10) during action.
The belt-type pumping unit with a new type of counterweight according to claim 5, wherein a guide rail (1001) matched with the displacement bearing (1202) is installed on the reciprocating frame (10), The length of the guide rail (1001) is less than the width of the reciprocating frame (10), and both ends of the guide rail (1001) are provided with limit platforms for restricting the displacement bearing (1202), and the displacement bearing ( 1202) rolling in the guide rail (1001).
The belt-type pumping unit with a new type of counterweight according to claim 5, characterized in that, on the frame (1) along the movement direction of the chain (8), a plurality of A limiter (101) for restricting the reciprocating rack (10) from shaking to both sides is fixedly installed on the surface of the limiter (13) in contact with the reciprocating rack (10). 10) Rollers for sliding resistance.