Pumping unit

Abstract

The invention provides an oil pumping unit. The oil pumping unit comprises a rack; the power support is movably arranged on the rack in the preset direction; the roller is rotatably arranged on the power bracket and extends in a preset direction; the first flexible polished rod is wound on the roller circle by circle from the first end of the roller to the middle of the roller, and the first flexible polished rod is provided with a first fixed end of the first end and a first extending section; the second flexible polished rod is wound on the roller circle by circle from the second end of the roller to the middle of the roller, the second flexible polished rod is provided with a second fixed end and a second extending section, and the winding direction of the first flexible polished rod is opposite to the winding direction of the second flexible polished rod; the first side of the roller and the second side of the roller are two sides which are oppositely arranged in the transverse direction; the first driving structure is arranged on the power support and can drive the roller to rotate. According to the technical scheme, the problem that the service life of a flexible polish rod in the related technology is short can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield exploitation, and more particularly, to a pumping unit. Background Art

[0002] In the related art, a pumping unit using a winch and a flexible polished rod to replace beam pumping units, tower pumping units, hydraulic pumping units, etc. can effectively increase the stroke of the pumping unit.

[0003] However, when such a pumping unit works, as the drum rotates, the flexible polished rod is released or retracted one by one. During this process, the position of the protruding end of the polished rod in the axial direction of the drum is constantly changing. However, the position of the crown block for supporting the protruding end of the polished rod remains unchanged, which will cause an angle between the protruding end of the polished rod and the central plane of the crown block, wearing the flexible polished rod and thus affecting the service life of the flexible polished rod. Summary of the Invention

[0004] The main object of the present invention is to provide a pumping unit to solve the problem of low service life of the flexible polished rod in the related art.

[0005] To achieve the above object, the present invention provides a pumping unit, including: a frame; a power support movably disposed on the frame along a preset direction; a drum rotatably disposed on the power support and extending along the preset direction; a first flexible polished rod wound around the drum from the first end of the drum to the middle of the drum in turns, the first flexible polished rod having a first fixed end fixed to the first end of the drum and a first protruding section capable of extending from the middle of the drum to the first side of the drum; a second flexible polished rod wound around the drum from the second end of the drum to the middle of the drum in turns, the second flexible polished rod having a second fixed end fixed to the second end of the drum and a second protruding section capable of extending from the middle of the drum to the second side of the drum, wherein the winding direction of the first flexible polished rod is opposite to that of the second flexible polished rod, and the first side and the second side of the drum are two sides oppositely disposed in the transverse direction; a first driving structure disposed on the power support and capable of driving the drum to rotate.

[0006] Further, the pumping unit further includes a guiding structure, the guiding structure including a guide rail extending along the preset direction and a roller rollably disposed in the guide rail, wherein one of the guide rail and the roller is disposed on the frame, and the other of the guide rail and the roller is disposed on the power support.

[0007] Further, the pumping unit further includes a second driving structure, which includes a threaded rotating rod and a threaded fitting. The threaded rotating rod extends along a preset direction, and a first thread is provided on the outer periphery of the threaded rotating rod. A second thread capable of cooperating with the first thread is provided on the surface of the threaded fitting facing the threaded rotating rod. One of the threaded rotating rod and the threaded fitting is provided on the frame, and the other of the threaded rotating rod and the threaded fitting is provided on the power support. When the threaded rotating rod rotates, it can cause a relative movement of the threaded rotating rod and the threaded fitting along the preset direction, thereby causing the power support to move relative to the frame along the preset direction.

[0008] Further, when the threaded rotating rod is provided on the power support, the frame has a horizontal support surface and a vertical support surface. The guiding structure is provided between the horizontal support surface and the lower surface of the power support, and the threaded fitting is provided on the vertical support surface.

[0009] Further, the first driving structure includes a driving motor, the output shaft of the driving motor is drivingly connected to the drum, and the pumping unit further includes a transmission belt provided between the output shaft of the driving motor and the threaded rotating rod to drive the threaded rotating rod to rotate through the driving motor.

[0010] Further, a plurality of guide rails are arranged in parallel, and at least two rollers are arranged in each guide rail.

[0011] Further, the pumping unit further includes a first polished rod guide wheel provided on the frame, the first polished rod guide wheel is located on the first side of the drum, and the first polished rod guide wheel supports below the first extended section; and / or, the pumping unit further includes a second polished rod guide wheel provided on the frame, the second polished rod guide wheel is located on the second side of the drum, and the second polished rod guide wheel supports below the second extended section.

[0012] Further, when the pumping unit includes the first polished rod guide wheel, the first polished rod guide wheel includes a support frame and a guide wheel structure provided on the support frame. One of the support frame and the frame is provided with a first adjustment groove extending along the preset direction, and the other of the support frame and the frame is provided with a second adjustment groove extending along a direction perpendicular to the preset direction. The support frame is adjustably mounted on the frame through a fastener passing through the first adjustment groove and the second adjustment groove.

[0013] Further, the pumping unit further includes a control unit electrically connected to the first driving structure. Wherein, a first angle sensor electrically connected to the control unit is provided at the first end of the drum. The first angle sensor can measure a first included angle between the first extending section and a plane perpendicular to the axis of the drum. When the first included angle is greater than or equal to 1°, the control unit controls the first driving structure to stop; and / or, a second angle sensor electrically connected to the control unit is provided at the second end of the drum. The second angle sensor can measure a second included angle between the second extending section and a plane perpendicular to the axis of the drum. When the second included angle is greater than or equal to 1°, the control unit controls the first driving structure to stop.

[0014] Further, the pumping unit further includes a control unit electrically connected to the first driving structure and a plurality of position sensors electrically connected to the control unit. The plurality of position sensors are respectively arranged at both ends of the guide rail.

[0015] Applying the technical solution of the present invention, the first driving structure is arranged on the power support and is drivingly connected to the drum to drive the drum to rotate, so as to enable the drum to release / receive the flexible polished rod. Wherein, the drum is arranged on the power support capable of moving along a preset direction on the frame. When the drum rotates to perform the action of releasing / receiving the flexible polished rod, the power support can move so that the positions of the first extending section of the first flexible polished rod and the second extending section of the second flexible polished rod on the horizontal plane always remain unchanged, thereby avoiding a large included angle between the first flexible polished rod and the second flexible polished rod and the corresponding polished rod guide wheels and affecting the service life of the first flexible polished rod and the second flexible polished rod. Specifically, in this application, the first flexible polished rod is wound around the drum from the first end of the drum to the middle of the drum turn by turn, and the second flexible polished rod is wound around the drum from the second end of the drum to the middle of the drum turn by turn. And the winding direction of the first flexible polished rod is opposite to the winding direction of the second flexible polished rod. When the first flexible polished rod releases one turn, the second flexible polished rod receives one turn, and the distance between the first flexible polished rod and the second flexible polished rod in the axial direction of the drum remains unchanged. At this time, as long as the power support is moved along the preset direction on the frame to the second end of the drum by the diameter of a polished rod, it can be ensured that the contact points of the first extending section and the drum and the contact points of the second extending section and the drum remain unchanged in the space coordinate system, thereby making the positions of the first extending section of the first flexible polished rod and the second extending section of the second flexible polished rod on the horizontal plane always remain unchanged. Therefore, the technical solution of this application can effectively solve the problem of low service life of the flexible polished rod in the related art. Description of the Drawings

[0016] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 The structural schematic diagram of an oil pumping unit according to an embodiment of the present invention is shown;

[0018] Figure 2 Shown is Figure 1 a top view schematic diagram of the drum, the first flexible polished rod, and the second flexible polished rod of the oil pumping unit;

[0019] Figure 3 Shown is Figure 1 a side view schematic diagram of the frame and the first polished rod guide wheel of the oil pumping unit;

[0020] Figure 4 Shown is Figure 1 a cross-sectional view of the first flexible polished rod of the oil pumping unit.

[0021] Among them, the above-mentioned drawings include the following reference numerals:

[0022] 10, frame; 11, horizontal support surface; 12, vertical support surface;

[0023] 20, power support;

[0024] 30, drum;

[0025] 41, first flexible polished rod; 411, first fixed end; 412, first extended section; 413, outer coating; 414, inner coating; 415, first layer of steel wire rope; 416, second layer of steel wire rope; 417, third layer of steel wire rope; 418, fourth layer of steel wire rope; 419, fifth layer of steel wire rope;

[0026] 42, second flexible polished rod; 421, second fixed end; 422, second extended section;

[0027] 50, guiding structure; 51, guide rail; 52, roller;

[0028] 60, second driving structure; 61, threaded rotating rod; 62, threaded fitting;

[0029] 70, transmission belt;

[0030] 80, first polished rod guide wheel; 81, support frame; 82, guide wheel structure;

[0031] a, preset direction. Detailed implementation manners

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way limits the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] Such as Figure 1 and Figure 2As shown in the figure, the present application provides a pumping unit. An embodiment of the pumping unit of the present application includes: a frame 10, a power support 20, a drum 30, a first flexible polished rod 41, a second flexible polished rod 42, and a first driving structure. Among them, the power support 20 is movably arranged on the frame 10 along a preset direction a; the drum 30 is rotatably arranged on the power support 20 and extends along the preset direction a; the first flexible polished rod 41 is wound around the drum 30 from the first end to the middle of the drum 30 turn by turn. The first flexible polished rod 41 has a first fixed end 411 fixed to the first end of the drum 30 and a first extending section 412 that can extend from the middle of the drum 30 to the first side of the drum 30; the second flexible polished rod 42 is wound around the drum 30 from the second end to the middle of the drum 30 turn by turn. The second flexible polished rod 42 has a second fixed end 421 fixed to the second end of the drum 30 and a second extending section 422 that can extend from the middle of the drum 30 to the second side of the drum 30. Among them, the winding direction of the first flexible polished rod 41 is opposite to the winding direction of the second flexible polished rod 42, and the first side and the second side of the drum 30 are two sides that are oppositely arranged in the transverse direction; the first driving structure is arranged on the power support 20 and can drive the drum 30 to rotate.

[0036] Applying the technical solution of this embodiment, the first driving structure is arranged on the power support 20 and is drivingly connected to the drum 30 to drive the drum 30 to rotate, so as to enable the drum 30 to release / receive the flexible optical rod. Among them, the drum 30 is arranged on the power support 20 that can move along the preset direction a on the frame 10. When the drum 30 rotates to perform the action of releasing / receiving the flexible optical rod, the power support 20 can move so that the positions of the first extending section 412 of the first flexible optical rod 41 and the second extending section 422 of the second flexible optical rod 42 on the horizontal plane always remain unchanged (that is, making the first extending section 412 and the second extending section 422 always perpendicular to the axis of the drum 30 or making the included angle between the first extending section 412 and the second extending section 422 and the axis of the drum 30 close to 90°), thereby avoiding a large included angle between the first flexible optical rod 41 and the second flexible optical rod 42 and the corresponding optical rod guide wheels and affecting the service life of the first flexible optical rod 41 and the second flexible optical rod 42. Specifically, in this embodiment, the first flexible optical rod 41 is wound around the drum 30 from the first end of the drum 30 to the middle of the drum 30 turn by turn, and the second flexible optical rod 42 is wound around the drum 30 from the second end of the drum 30 to the middle of the drum 30 turn by turn, and the winding direction of the first flexible optical rod 41 is opposite to the winding direction of the second flexible optical rod 42. When the first flexible optical rod 41 releases one turn, the second flexible optical rod 42 winds up one turn, and the distance between the first flexible optical rod 41 and the second flexible optical rod 42 in the axial direction of the drum 30 remains unchanged. At this time, as long as the power support 20 is moved along the preset direction a on the frame 10 towards the second end of the drum 30 by the diameter of one optical rod, it can be ensured that the contact points of the first extending section 412 and the drum 30 and the contact points of the second extending section and the drum 30 remain unchanged in the space coordinate system, thereby making the positions of the first extending section 412 of the first flexible optical rod 41 and the second extending section 422 of the second flexible optical rod 42 on the horizontal plane always remain unchanged. Therefore, the technical solution of this embodiment can effectively solve the problem of low service life of the flexible optical rod in the related art.

[0037] In this embodiment, when the pumping unit is operating normally, one of the first flexible optical rod 41 and the second flexible optical rod 42 is in a wound state, and the other is in a relaxed state. The distance between the first flexible optical rod 41 and the second flexible optical rod 42 is 4 times the diameter of one optical rod. As the drum 30 rotates, the distance between the first flexible optical rod 41 and the second flexible optical rod 42 always remains unchanged.

[0038] Figure 4A cross-sectional view of the first flexible optical rod 41 is shown, which includes an outer coating layer 413, an inner coating layer 414, and the first steel wire rope 415, the second steel wire rope 416, the third steel wire rope 417, the fourth steel wire rope 418, and the fifth steel wire rope 419 arranged in sequence from the inside to the outside. The structure of the second flexible optical rod 42 is the same as that of the first flexible optical rod 41, and will not be described in detail here.

[0039] As Figure 1 shown, the pumping unit further includes a guiding structure 50. The guiding structure 50 includes a guide rail 51 extending along a preset direction a and a roller 52 rotatably disposed in the guide rail 51. Among them, one of the guide rail 51 and the roller 52 is disposed on the frame 10, and the other of the guide rail 51 and the roller 52 is disposed on the power support 20. By guiding the movement of the power support 20 relative to the frame 10 through the guiding and cooperating guide rail 51 and roller 52, it can be ensured that the power support 20 can only move along the preset direction a. In addition, the friction between the guide rail 51 and the roller 52 is rolling friction, making the movement of the power support 20 smoother and consuming less energy.

[0040] As Figure 1 shown, the pumping unit further includes a second driving structure 60. The second driving structure 60 includes a threaded rotating rod 61 and a threaded fitting 62. The threaded rotating rod 61 extends along the preset direction a, and a first thread is provided on the outer periphery of the threaded rotating rod 61. A second thread capable of cooperating with the first thread is provided on the surface of the threaded fitting 62 facing the threaded rotating rod 61. Among them, one of the threaded rotating rod 61 and the threaded fitting 62 is disposed on the frame 10, and the other of the threaded rotating rod 61 and the threaded fitting 62 is disposed on the power support 20. When the threaded rotating rod 61 rotates, it can cause a relative movement between the threaded rotating rod 61 and the threaded fitting 62 along the preset direction a, thereby causing the power support 20 to move relative to the frame 10 along the preset direction a. Through the setting of the second driving structure 60, the rotation of the threaded rotating rod 61 is converted into a relative movement between the threaded rotating rod 61 and the threaded fitting 62 along the preset direction a, thereby driving the power support 20 to move in the preset direction a, having the advantages of simple structure and reliable driving. By reasonably setting parameters such as the pitch of the first thread and the second thread, when the drum 30 rotates one circle, the moving stroke of the power support 20 is the diameter of a flexible optical rod.

[0041] As Figure 1As shown, when the threaded rotating rod 61 is arranged on the power support 20, the machine frame 10 has a horizontal support surface 11 and a vertical support surface 12. The guiding structure 50 is arranged between the horizontal support surface 11 and the lower surface of the power support 20, and the threaded fitting 62 is arranged on the vertical support surface 12. Specifically, the threaded rotating rod 61 is arranged on the upper surface of the power support 20. The vertical support surface 12 extends from the side of the power support 20 to above the power support 20. The threaded fitting 62 is arranged on the vertical support surface 12 and is in driving cooperation with the threaded rotating rod 61.

[0042] It should be noted that Figure 1 it is mainly to show the main components of the pumping unit and display the cooperation relationship between each component. The positional relationship of each component in the space coordinate system shall be subject to the written description.

[0043] As Figure 1 shown, the first driving structure includes a driving motor. The output shaft of the driving motor is drivingly connected to the drum 30. The pumping unit further includes a transmission belt 70 arranged between the output shaft of the driving motor and the threaded rotating rod 61 to drive the threaded rotating rod 61 to rotate by the driving motor. In this embodiment, the first driving structure drives the drum 30 and the threaded rotating rod 61 to rotate simultaneously through the transmission belt 70, without additionally arranging a driving structure for the threaded rotating rod 61, reducing the cost of the pumping unit. In addition, it also makes the rotation of the threaded rotating rod 61 match the rotation of the drum 30, ensuring the synchronism between the movement of the power support 20 and the rotation of the drum 30. Specifically, the transmission ratio of the transmission wheels at both ends of the transmission belt 70 can be set to 1:1, and the pitch of the first thread and the second thread is equal to the diameter of the flexible polished rod.

[0044] Specifically, in this embodiment, the drum 30 is a hollow cylindrical structure. Both ends of the cylindrical structure have end faces, and outwardly extending central shafts are respectively arranged on the two end faces. Among them, the axes of the two central shafts coincide with the axis of the cylindrical structure. A support seat is arranged on the power support 20, a support hole is arranged on the support seat, the central shaft passes through the support hole, and a bearing structure is arranged between the central shaft and the support hole. The driving motor is fixedly arranged on the power support 20. The first driving structure further includes a reducer, and the reducer is connected between the output shaft of the driving motor and one central shaft of the drum 30. The installation method of the threaded rotating rod 61 is similar to that of the drum 30 and will not be elaborated here.

[0045] As Figure 1As shown, there are multiple guide rails 51 arranged in parallel, and at least two rollers 52 are arranged in each guide rail 51. By arranging multiple guide rails 51 and at least two rollers 52 in each guide rail 51, the smoothness of the power support 20 during its movement relative to the organic frame 10 can be ensured. Specifically, in this embodiment, the number of guide rails 51 is two, the two guide rails 51 are arranged on the horizontal support surface 11, and the number of rollers 52 in each guide rail 51 is also two. A total of four rollers 52 are arranged on the lower surface of the power support 20.

[0046] As Figures 1 to 3 shown, the pumping unit further includes a first polished rod guide wheel 80 arranged on the frame 10. The first polished rod guide wheel 80 is located on the first side of the drum 30, and the first polished rod guide wheel 80 is supported below the first extended section 412; the pumping unit further includes a second polished rod guide wheel arranged on the frame 10. The second polished rod guide wheel is located on the second side of the drum 30, and the second polished rod guide wheel is supported below the second extended section 422. By supporting the first flexible polished rod 41 with the first polished rod guide wheel 80, the first flexible polished rod 41 is changed from extending in the transverse direction to extending in the vertical direction to face the wellhead; by supporting the second flexible polished rod 42 with the second polished rod guide wheel, the second flexible polished rod 42 is changed from extending in the transverse direction to extending in the vertical direction to face the wellhead.

[0047] As Figure 3 shown, when the pumping unit includes the first polished rod guide wheel 80, the first polished rod guide wheel 80 includes a support frame 81 and a guide wheel structure 82 arranged on the support frame 81. Among them, a first adjustment groove extending along a preset direction a is arranged on one of the support frame 81 and the frame 10, and a second adjustment groove extending in a direction perpendicular to the preset direction a is arranged on the other of the support frame 81 and the frame 10. The support frame 81 is adjustably installed on the frame 10 through a fastener passing through the first adjustment groove and the second adjustment groove. Specifically, by arranging the first adjustment groove and the second adjustment groove, the support frame 81 can be adjusted in position on the horizontal plane, and further the first flexible polished rod 41 can face the wellhead.

[0048] Specifically, the above-mentioned fastener is a bolt. When the oil well is repaired, the first polished rod guide wheel 80 can be removed as a whole to achieve well repair and make way.

[0049] The specific structure and position adjustment method of the second polished rod guide wheel are the same as those of the first polished rod guide wheel 80, and will not be elaborated here.

[0050] In this embodiment, the pumping unit further includes a control unit electrically connected to the first driving structure. Wherein, a first angle sensor electrically connected to the control unit is provided at the first end of the drum 30. The first angle sensor can measure a first included angle between the first extending section 412 and a plane perpendicular to the axis of the drum 30. When the first included angle is greater than or equal to 1°, the control unit controls the first driving structure to stop. A second angle sensor electrically connected to the control unit is provided at the second end of the drum 30. The second angle sensor can measure a second included angle between the second extending section 422 and a plane perpendicular to the axis of the drum 30. When the second included angle is greater than or equal to 1°, the control unit controls the first driving structure to stop. By providing the control unit, the first angle sensor and the second angle sensor to detect the first included angle between the first extending section 412 and the plane perpendicular to the axis of the drum 30 and the second included angle between the second extending section 422 and the plane perpendicular to the axis of the drum 30, and when one of the two included angles exceeds the preset range (1°), the first driving structure is controlled to stop, realizing intelligent control, ensuring that the first included angle and the second included angle are always kept within a reasonable range, and avoiding excessive wear of the first flexible polished rod 41 and the second flexible polished rod 42 due to too large first included angle and second included angle.

[0051] In this embodiment, the pumping unit further includes a control unit electrically connected to the first driving structure and a plurality of position sensors electrically connected to the control unit. The plurality of position sensors are respectively arranged at both ends of the guide rail 51. By providing the control unit and the position sensors to detect the limit positions of the power support 20 moving in the preset direction a, intelligent control is realized, and the power support 20 is prevented from moving outside the preset range.

[0052] Applying the technical solution of this embodiment enables the polished rod loads of two rod pumping wells to balance and offset each other, improving the load rate of the driving motor of the pumping unit and the lifting efficiency of the rod pumping system. At the same time, since the flexible polished rod has a follow-up centering transmission mechanism, the included angle between the flexible polished rod and the crown block plane is less than 3°, which theoretically can meet any wellhead spacing and has a wide application range.

[0053] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0054] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0055] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0056] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pumping unit, characterized in that, Including: A frame (10); A power support (20) movably arranged on the frame (10) along a preset direction (a); A roller (30) rotatably arranged on the power support (20) and extending along the preset direction (a); A first flexible optical rod (41) wound around the roller (30) turn by turn from the first end to the middle of the roller (30). The first flexible optical rod (41) has a first fixed end (411) fixed to the first end of the roller (30) and a first extended section (412) capable of extending from the middle of the roller (30) to the first side of the roller (30); A second flexible optical rod (42) wound around the roller (30) turn by turn from the second end to the middle of the roller (30). The second flexible optical rod (42) has a second fixed end (421) fixed to the second end of the roller (30) and a second extended section (422) capable of extending from the middle of the roller (30) to the second side of the roller (30). Wherein, the winding direction of the first flexible optical rod (41) is opposite to that of the second flexible optical rod (42), and the first side and the second side of the roller (30) are two sides oppositely arranged in the transverse direction; A first driving structure arranged on the power support (20) and capable of driving the roller (30) to rotate.

2. The pumping unit according to claim 1, characterized in that, The pumping unit further includes a guiding structure (50). The guiding structure (50) includes a guide rail (51) extending along the preset direction (a) and a roller (52) rollably arranged in the guide rail (51). Wherein, one of the guide rail (51) and the roller (52) is arranged on the frame (10), and the other of the guide rail (51) and the roller (52) is arranged on the power support (20).

3. The pumping unit according to claim 2, characterized in that, The pumping unit further includes a second driving structure (60). The second driving structure (60) includes a threaded rotating rod (61) and a threaded fitting (62). The threaded rotating rod (61) extends along the preset direction (a), and a first thread is arranged on the outer periphery of the threaded rotating rod (61). A second thread capable of cooperating with the first thread is arranged on the surface of the threaded fitting (62) facing the threaded rotating rod (61). Wherein, one of the threaded rotating rod (61) and the threaded fitting (62) is arranged on the frame (10), and the other of the threaded rotating rod (61) and the threaded fitting (62) is arranged on the power support (20). When the threaded rotating rod (61) rotates, it can cause a relative movement between the threaded rotating rod (61) and the threaded fitting (62) along the preset direction (a), thereby causing the power support (20) to move relative to the frame (10) along the preset direction (a).

4. The pumping unit according to claim 3, characterized in that, When the threaded rotating rod (61) is arranged on the power support (20), the machine frame (10) has a horizontal support surface (11) and a vertical support surface (12). The guiding structure (50) is arranged between the horizontal support surface (11) and the lower surface of the power support (20), and the threaded fitting (62) is arranged on the vertical support surface (12).

5. The pumping unit according to claim 4, characterized in that, The first driving structure includes a driving motor, the output shaft of the driving motor is drivingly connected to the drum (30), and the pumping unit further includes a transmission belt (70) arranged between the output shaft of the driving motor and the threaded rotating rod (61) to drive the threaded rotating rod (61) to rotate by the driving motor.

6. The pumping unit according to claim 2, wherein A plurality of the guide rails (51) are arranged in parallel, and at least two of the rollers (52) are arranged in each of the guide rails (51).

7. The pumping unit according to any one of claims 1 to 6, characterized in that the pumping unit further includes a first polished rod guide pulley (80) arranged on the machine frame (10). The first polished rod guide pulley (80) is located on the first side of the drum (30), and the first polished rod guide pulley (80) supports below the first extended section (412); and / or the pumping unit further includes a second polished rod guide pulley arranged on the machine frame (10). The second polished rod guide pulley is located on the second side of the drum (30), and the second polished rod guide pulley supports below the second extended section (422).

8. The pumping unit according to any one of claims 7, characterized in that When the pumping unit includes the first polished rod guide pulley (80), the first polished rod guide pulley (80) includes a support frame (81) and a guide pulley structure (82) arranged on the support frame (81). Among them, a first adjustment groove extending along the preset direction (a) is arranged on one of the support frame (81) and the machine frame (10), and a second adjustment groove extending along a direction perpendicular to the preset direction (a) is arranged on the other of the support frame (81) and the machine frame (10). The support frame (81) is adjustably installed on the machine frame (10) through a fastener passing through the first adjustment groove and the second adjustment groove.

9. The pumping unit according to any one of claims 1 to 6, characterized in that, The pumping unit further includes a control unit electrically connected to the first driving structure, wherein a first angle sensor electrically connected to the control unit is arranged at the first end of the drum (30). The first angle sensor can measure a first included angle between the first extended section (412) and a plane perpendicular to the axis of the drum (30). When the first included angle is greater than or equal to 1°, the control unit controls the first driving structure to stop; and / or a second angle sensor electrically connected to the control unit is arranged at the second end of the drum (30). The second angle sensor can measure a second included angle between the second extended section (422) and a plane perpendicular to the axis of the drum (30). When the second included angle is greater than or equal to 1°, the control unit controls the first driving structure to stop.

10. The pumping unit according to any one of claims 2 to 6, characterized in that, The pumping unit further includes a control unit electrically connected to the first driving structure and a plurality of position sensors electrically connected to the control unit, and the plurality of position sensors are respectively arranged at two ends of the guide rail (51).

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