Coaxial deflection blade extrusion booster pump

Abstract

The utility model relates to a coaxial deflection blade extrusion booster pump and relates to the technical field of pumps, the coaxial deflection blade extrusion booster pump comprises a pump shell, sealing covers are fixedly connected to the two ends of the pump shell, a plurality of holes are formed in the sealing covers, a center rod penetrates through and is rotationally connected to the axis of the pump shell, and an eccentric circle extrusion rotor penetrates through and is fixedly connected to the center rod; the eccentric circle extrusion rotor is arranged in the pump shell, movable arms are arranged on the two sides of the eccentric circle extrusion rotor, one end of each movable arm abuts against the eccentric circle extrusion rotor, and the other end of each movable arm is hinged to the inner wall of the pump shell. The method has the effect of improving the mining efficiency of the booster pump.

Description

Technical Field

[0001] This application relates to the technical field of pumps, and in particular to a coaxial deflection vane extrusion relay pump. Background Art

[0002] The oil production method refers to the method of pumping crude oil from the formation to the ground. From the perspective of objective underground energy, it can be divided into natural flow production and artificial lift.

[0003] Sucker rod pump oil production is the most widely used oil production method at home and abroad. In China, sucker rod pump oil production accounts for about 90% of the total number of artificial lift oil production wells. During the process of sucker rod pump oil production, due to the relatively deep well depth, a relay pump is usually required. A relay pump is a special pump system, usually used in applications that require high head or long-distance fluid transportation. The relay pump system consists of multiple pumps, which work in series or parallel to increase the pressure or flow rate of the fluid. In the relay pump system, each pump is called a "relay point", and the fluid is further pressurized at each relay point, so as to achieve long-distance or high-head transportation.

[0004] However, for the relay pump of the oil production device in the related technology, usually more than six arc-shaped impellers arranged in a divergent shape are fixed on the pump shaft to generate negative pressure inside the pump. However, the above setting will cause the friction position and sliding displacement of the impeller to be relatively large, which will easily lead to wear, resulting in poor sealing performance and reduced pressure, thus resulting in low oil production efficiency. Content of the Utility Model

[0005] In order to improve the production efficiency of the relay pump, this application provides a coaxial deflection vane extrusion relay pump.

[0006] The coaxial deflection vane extrusion relay pump provided by this application adopts the following technical solutions:

[0007] The coaxial deflection vane extrusion relay pump includes a pump housing, both ends of the pump housing are fixedly connected with covers, a plurality of holes are opened on the covers, a central rod is penetrated and rotatably connected at the axis of the pump housing, an eccentric circular extrusion rotor is penetrated and fixedly connected on the central rod, the eccentric circular extrusion rotor is placed inside the pump housing, movable arms are arranged on both sides of the eccentric circular extrusion rotor, one end of the movable arm abuts against the eccentric circular extrusion rotor, and the other end of the movable arm is hinged to the inner wall of the pump housing.

[0008] By adopting the above technical solution, since the central rod is coaxially arranged with the pump housing, this relay pump becomes a coaxial pump. As the vanes in the vane pump rotate continuously, while the pump in this solution only realizes the change of the sizes of two parts of the space inside the pump by the movement of the movable arm during operation, without the need for rotational displacement, the movement amplitude is small and the wear is small. The sealing structure is simple and of a high level. Therefore, the pressure generated by the pump in this application is greater than that of the traditional impeller pump, thereby improving the mining efficiency of the relay pump.

[0009] Optionally, an arc-shaped sealing piece is hinged at one end of the movable arm close to the eccentric circular extrusion rotor. The inner arc surface of the arc-shaped sealing piece is in sliding and sealing connection with the eccentric circular extrusion rotor, and the movable arm abuts against the eccentric circular extrusion rotor through the arc-shaped sealing piece.

[0010] By adopting the above technical solution, the movable arm can abut against the eccentric circular extrusion rotor through the arc-shaped sealing piece, thereby improving the sealing performance between the movable arm and the eccentric circular extrusion rotor.

[0011] Optionally, sealing covers are sleeved on both the upper and lower ends of the eccentric circular extrusion rotor, and the sealing covers are in sliding and sealing connection with the inner wall of the cover.

[0012] By adopting the above technical solution, the gaps between both ends of the eccentric circular extrusion rotor and the cover can be reduced through the sealing covers, thereby improving the sealing performance inside the pump housing.

[0013] Optionally, convex blocks are fixedly connected to both the upper and lower ends of the arc-shaped sealing piece. The convex blocks are arranged along the length direction of the arc-shaped sealing piece. Sealing grooves are opened at both the upper and lower ends of the sealing cover and are arranged around the axis of the sealing cover. The convex blocks are in sliding and sealing connection in the sealing grooves.

[0014] By adopting the above technical solution, when the eccentric circular extrusion rotor rotates, the convex blocks can reciprocally slide in the sealing grooves, and further, the sliding and sealing connection between the arc-shaped sealing piece and the eccentric circular extrusion rotor can be realized through the sealing grooves and the convex blocks.

[0015] Optionally, both the upper and lower ends of the movable arm are in sliding and sealing connection with the cover.

[0016] By adopting the above technical solution, the gaps between both the upper and lower ends of the movable arm and the cover can be reduced, improving the overall sealing performance of the body.

[0017] Optionally, the movable arm is arranged in an arc shape and its inner arc surface faces the side of the axis of the pump housing.

[0018] By adopting the above technical solution, the deflections of the two arc-shaped movable arms can be the same, thereby generating a relatively large space difference inside the pump housing, and thus increasing the pressure generated inside the pump housing.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. It can be achieved by changing the sizes of two parts of the space inside the pump through the movement of the movable arm, without the need for rotation, with a small movement amplitude, a simple and high-level sealing structure;

[0021] 2. The sealing cover can reduce the gap between the two ends of the eccentric circle extrusion rotor and the sealing cover, thereby improving the sealing performance inside the pump housing;

[0022] 3. When the eccentric circle extrusion rotor rotates, the convex block can reciprocate in the sealing groove, and then the sliding and sealing connection between the arc-shaped sealing piece and the eccentric circle extrusion rotor can be realized through the sealing groove and the convex block. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the structure of the eccentric circle extrusion rotor of an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of the actual application of an embodiment of the present application.

[0026] In the figure, 1 is the pump housing; 2 is the sealing cover; 21 are the holes; 3 is the central rod; 4 is the eccentric circle extrusion rotor; 5 is the movable arm; 6 is the arc-shaped sealing piece; 61 is the convex block; 7 is the sealing cover; 71 is the sealing groove; 8 is the oil production pipeline; 9 is the check valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following further describes the present application in detail with reference to the attached Figure 1 - attached Figure 3 , drawings.

[0028] An embodiment of the present application is: a coaxial deflection vane extrusion relay pump. Referring to Figure 1 and Figure 2 , it includes a pump housing 1, and the pump housing 1 is arranged in a circular tube shape. Both ends of the pump housing 1 are fixedly connected with sealing covers 2, and the two sealing covers 2 completely seal the inside of the pump housing 1.

[0029] Two holes 21 are respectively opened on each sealing cover 2. A central rod 3 is penetrated and rotatably connected at the axis of the pump housing 1. An eccentric circle extrusion rotor 4 is penetrated and fixedly connected on the central rod 3. The holes 21 are respectively located on both sides of the eccentric circle extrusion rotor 4, and the eccentric circle extrusion rotor 4 is located inside the pump housing 1.

[0030] On both sides of the eccentric circular extrusion rotor 4, there are movable arms 5. The movable arms 5 are arranged in an arc shape, and the inner arc surface thereof faces the side of the axis of the pump casing 1. One end of the movable arm 5 is hinged to the inner wall of the pump casing 1, and an arc-shaped sealing piece 6 is hinged to the other end of the movable arm 5. The inner arc surface of the arc-shaped sealing piece 6 is in sliding and sealing connection with the eccentric circular extrusion rotor 4, and the movable arm 5 abuts against the eccentric circular extrusion rotor 4 through the arc-shaped sealing piece 6. The two movable arms 5 and the extrusion rotor divide the space inside the pump casing 1 into two parts.

[0031] Thus, when the central rod 3 rotates, the eccentric circular extrusion rotor 4 can rotate together with the central rod 3. Therefore, the protruding parts in the eccentric circular extrusion rotor 4 will repeatedly squeeze the movable arms 5 on both sides, thereby causing the two movable arms 5 to swing by a certain amplitude, and further changing the volume and pressure of the two parts of the space inside the pump casing 1. Thus, the external oil can enter the pump casing 1 from the hole 21.

[0032] Meanwhile, in order to improve the sealing performance and stability between the eccentric circular extrusion rotor 4 and the arc-shaped sealing piece 6, sealing covers 7 are sleeved and fixedly connected to the upper and lower ends of the eccentric circular extrusion rotor 4, and the sealing covers 7 are in sliding and sealing connection with the inner wall of the cover 2. At the upper and lower ends of the arc-shaped sealing piece 6, convex blocks 61 are fixedly connected. The convex blocks 61 are arranged along the length direction of the arc-shaped sealing piece 6. At the upper and lower ends of the sealing cover 7, sealing grooves 71 are opened around the axis of the sealing cover 7, and the convex blocks 61 are in sliding and sealing connection in the sealing grooves 71.

[0033] Thus, when the eccentric circular extrusion rotor 4 rotates, the convex blocks 61 can reciprocate in the sealing grooves 71, and the sealing between the arc-shaped sealing piece 6 and the eccentric circular extrusion rotor 4 is achieved through the sealing grooves 71 and the convex blocks 61 during the sliding.

[0034] Meanwhile, in order to further improve the sealing performance inside the pump casing 1, the upper and lower ends of the movable arm 5 are in sliding and sealing connection with the cover 2.

[0035] Refer to Figure 2 and Figure 3 , during the actual application process, multiple groups of deflection vane extrusion relay pumps can be installed in the oil production pipeline 8 along the axis direction of the oil production pipeline 8. In the figures of this embodiment, two groups of coaxial deflection vane extrusion relay pumps are set. The two groups of coaxial deflection vane extrusion relay pumps are arranged up and down. Among them, in order to reduce the vibration of the two groups of coaxial deflection vane extrusion relay pumps during use, the eccentric circular extrusion rotors 4 in the two groups of coaxial deflection vane extrusion relay pumps are symmetrically arranged at 180°.

[0036] At the hole 21 of each cover 2, a check valve 9 is installed. The two groups of coaxial deflection vane extrusion relay pumps are interconnected through the check valve 9, and in this embodiment, the check valve 9 is set as a check valve 9 with a valve ball and a spring inside.

[0037] Taking the coaxial deflection vane extrusion relay pump located at the uppermost part of the oil production pipeline 8 as an example, when the eccentric circle inside it squeezes the rotor 4 to rotate to the right as shown in the figure, the space on the left side inside the pump housing 1 increases at this time, and the space on the right side is squeezed. At this time, the one-way valve 9 located at the lower left side of the pump will draw oil into the pump housing 1, and the one-way valve 9 located at the upper right side of the pump will discharge the oil in the right-side space upward. Similarly, when the eccentric circle inside it squeezes the rotor 4 to rotate to the left, since the space on the right side inside the pump housing 1 increases at this time and the space on the left side is squeezed, the one-way valve 9 located at the lower right side of the pump will draw oil into the pump housing 1, and the one-way valve 9 located at the upper left side of the pump will discharge the oil in the left-side space upward. Thus, the relay transportation of multiple coaxial deflection vane extrusion relay pumps is realized.

[0038] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are represented by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A coaxial deflected blade extrusion relay pump, comprising a pump housing (1), wherein both ends of the pump housing (1) are fixedly connected to a cover (2), wherein the cover (2) is provided with a plurality of holes (21), wherein: A center rod (3) is passed through and rotatably connected to the axis of the pump housing (1); an eccentric circular extrusion rotor (4) is passed through and fixedly connected to the center rod (3); the eccentric circular extrusion rotor (4) is placed in the pump housing (1); movable arms (5) are provided on both sides of the eccentric circular extrusion rotor (4); one end of the movable arm (5) is in contact with the eccentric circular extrusion rotor (4); and the other end of the movable arm (5) is hinged to the inner wall of the pump housing (1).

2. The coaxial deflected blade extrusion relay pump according to claim 1, characterized in that: An arc-shaped sealing sheet (6) is hingedly connected to one end of the movable arm (5) close to the eccentric extrusion rotor (4); the inner arc surface of the arc-shaped sealing sheet (6) is connected to the eccentric extrusion rotor (4) in a sliding sealing manner; and the movable arm (5) abuts against the eccentric extrusion rotor (4) via the arc-shaped sealing sheet (6).

3. The coaxial deflected blade extrusion relay pump according to claim 2, characterized in that: The upper and lower ends of the eccentric circular extrusion rotor (4) are both sleeved with sealing covers (7), and the sealing covers (7) are slidably and sealingly connected to the inner wall of the sealing cover (2).

4. The coaxial deflected blade extrusion relay pump according to claim 3, characterized in that: The upper and lower ends of the arc-shaped sealing sheet (6) are both fixedly connected with protrusions (61), and the protrusions (61) are arranged along the length direction of the arc-shaped sealing sheet (6). The upper and lower ends of the sealing cover (7) are both provided with sealing grooves (71) arranged around the axis of the sealing cover (7), and the protrusions (61) are slidably and sealingly connected in the sealing grooves (71).

5. The coaxial deflected blade extrusion relay pump according to claim 1, characterized in that: The upper and lower ends of the movable arm (5) are slidably and sealingly connected to the cover (2).

6. The coaxial deflected blade extrusion relay pump according to claim 1, characterized in that: The movable arm (5) is arranged in an arc shape, and its inner arc surface faces one side of the axis of the pump casing (1).

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