CN110617211A - Oil well pump and valve structure - Google Patents
Oil well pump and valve structure Download PDFInfo
- Publication number
- CN110617211A CN110617211A CN201911013556.3A CN201911013556A CN110617211A CN 110617211 A CN110617211 A CN 110617211A CN 201911013556 A CN201911013556 A CN 201911013556A CN 110617211 A CN110617211 A CN 110617211A
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- China
- Prior art keywords
- valve
- oil
- top end
- guide post
- pump
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- 239000003129 oil well Substances 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 230000000903 blocking effect Effects 0.000 claims abstract description 20
- 239000013013 elastic material Substances 0.000 claims abstract description 7
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 69
- 230000000694 effects Effects 0.000 description 8
- 238000000605 extraction Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
- F04B53/1017—Semi-spherical ball valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Check Valves (AREA)
Abstract
The utility model provides an oil-well pump and valve structure relates to oil development technical field. The valve structure comprises a valve cover, a valve seat, a plugging piece, a guide column, a pressing sleeve and a sealing piece. The valve cover is provided with a first end and a second end which are communicated, the second end is provided with a fixing part, and the fixing part is provided with a guide hole and an oil passing hole; the valve seat is provided with a bottom end part and a top end part which are communicated, the top end part is in sealed fit with the first end, and the bottom end part is positioned outside the first end; the blocking piece is arranged in the valve cover and is a rotary body, the blocking piece comprises a bottom surface and a side surface surrounding the bottom surface, the side surface gradually shrinks towards the first end and movably abuts against the top end part of the valve seat, and the bottom surface is larger than the inner diameter of the top end part and faces towards the second end; one end of the guide post is connected with the bottom surface, and the other end of the guide post can slidably penetrate through the guide hole; the pressing sleeve is slidably sleeved on the guide post; the sealing element is sleeved outside the guide column and located between the pressing sleeve and the bottom surface, a flange which surrounds the bottom surface and abuts against the top end portion is arranged on the edge of the sealing element, and the sealing element is made of elastic materials.
Description
Technical Field
The disclosure relates to the technical field of oil exploitation, in particular to an oil well pump and a valve structure.
Background
In the field of oil extraction, an oil well pump is an indispensable device that can lift crude oil in a well to the surface. The existing oil well pump generally adopts a valve to realize the one-way flow of petroleum, and the valve is a valve. Existing valves are typically opened and closed by contact or separation of a valve ball with a valve seat. However, in actual use, foreign particles such as sand and stone are often generated between the valve ball and the valve seat, so that a gap exists between the valve ball and the valve seat, and pumped oil can flow back, namely leak, and the oil extraction efficiency is affected.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The present disclosure aims to overcome the defects of the prior art, and the present disclosure aims to provide an oil well pump and a valve structure, which can prevent oil leakage and improve oil extraction efficiency.
According to one aspect of the present disclosure, there is provided a valve structure comprising:
the valve cover is provided with a first end and a second end which are communicated, a fixing part is arranged in the second end, and the fixing part is provided with a guide hole and an oil passing hole which are communicated along the axial direction of the valve cover;
a valve seat having a bottom end portion and a top end portion therethrough, the top end portion being sealingly engaged within the first end, the bottom end portion being located outside the first end;
the blocking piece is a rotary body and comprises a bottom surface and a side surface surrounding the bottom surface, the side surface gradually shrinks towards the first end and movably abuts against the top end part of the valve seat, and the bottom surface is larger than the inner diameter of the top end part and faces towards the second end;
one end of the guide post is connected with the bottom surface, and the other end of the guide post can slidably penetrate through the guide hole;
the pressing sleeve is slidably sleeved on the guide post and is positioned on one side of the bottom surface close to the second end;
the sealing element is sleeved outside the guide column and located between the pressing sleeve and the bottom surface, a flange which surrounds the bottom surface and abuts against the top end portion is arranged on the edge of the sealing element, and the sealing element is made of elastic materials.
In an exemplary embodiment of the present disclosure, the blocking member is a segment structure, the bottom surface is a bottom surface of the segment structure, and the side surface is a spherical cap of the segment structure.
In an exemplary embodiment of the disclosure, a surface of the flange abutting the tip portion has at least one ring of annular rib surrounding the bottom surface.
In an exemplary embodiment of the present disclosure, a surface of the annular projected ridge abutting against the tip portion is a curved surface.
In an exemplary embodiment of the present disclosure, the guide post and the block piece are of a unitary structure.
In an exemplary embodiment of the present disclosure, the bottom surface has a connecting rod, and the guide post is provided with a connecting hole, and the connecting rod is fitted through the connecting hole and detachably connected to the guide post.
According to one aspect of the present disclosure, there is provided an oil well pump comprising:
the pump cylinder is provided with a penetrating oil inlet end and a penetrating oil outlet end;
the plunger is slidably arranged in the pump cylinder;
the first valve is fixedly butted at the oil inlet end;
the second valve is arranged in the pump barrel and fixed at one end of the plunger close to the oil inlet end;
at least one of the first valve and the second valve is the valve structure; if the first valve is in the valve structure, the second end of the valve cover of the first valve is fixedly butted with the oil inlet end along the axial direction; if the second valve is in the valve structure, the second end of the valve cover of the second valve is fixedly butted with the plunger along the axial direction.
In an exemplary embodiment of the present disclosure, the oil well pump further includes:
and the third valve is arranged in the pump barrel and is fixedly butted with one end, far away from the oil inlet end, of the plunger.
In an exemplary embodiment of the disclosure, the third valve is of the valve structure, and a bottom end portion of a valve seat of the third valve is fixedly butted with the plunger in an axial direction.
In an exemplary embodiment of the present disclosure, an annular groove is formed in an outer periphery of the plunger, the annular groove is located on a side of the second valve away from the first valve, and a bottom surface of the annular groove is a tapered surface gradually shrinking towards the second valve; and a sealing ring which is in sealing fit with the pump barrel is arranged in the ring groove.
The oil well pump and the valve structure have the advantages that the sealing piece is a rotary body, and the sealing can be realized by abutting the side surface of the sealing piece with the top end part of the valve seat; simultaneously, because the bottom surface of shutoff piece has set up the sealing member of elastic material, under the effect of oil pressure, the turn-ups of sealing member can with the sealed cooperation of terminal surface in this top portion to realize that twice is sealed, make sealed effect promote, even if when there is the clearance that foreign particles caused between the side of shutoff piece and valve seat, still can guarantee sealed effect, prevent that the oil from flowing back and leaking, be favorable to improving the oil recovery volume. If the plugging piece is separated from the valve seat under the action of oil pressure, the flow of oil is not influenced. In addition, the guide post can guide the plugging piece to move along the axial direction of the valve cover, so that the plugging piece is prevented from deflecting.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic diagram of a valve structure according to an embodiment of the present disclosure.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a schematic view of a segment of a valve structure according to an embodiment of the present disclosure.
FIG. 4 is a schematic view of a seal of a valve configuration according to an embodiment of the present disclosure.
Fig. 5 is a schematic view of an oil well pump according to an embodiment of the present disclosure.
Fig. 6 is an enlarged view of a portion B in fig. 5.
Fig. 7 is an enlarged view of a portion C in fig. 5.
Fig. 8 is an enlarged view of a portion D in fig. 5.
Fig. 9 is an enlarged view of a portion E in fig. 5.
Description of reference numerals:
1. a valve cover; 101. a fixed part; 1011. an oil passing hole; 102. a first boss; 2. a valve seat; 201. a first seat body; 202. a second seat body; 2021. a second boss; 3. a blocking member; 31. a bottom surface; 32. a side surface; 321. a screw hole; 4. a guide post; 5. pressing the sleeve; 6. a seal member; 61. flanging; 611. an annular rib; 100. a pump barrel; 200. a plunger; 2001. a ring groove; 300. a bushing; 400. a first press cap; 500. a second press cap; 600. and (5) sealing rings.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and are not limiting on the number of their objects.
The embodiment of the disclosure provides a valve structure, which can be used for an oil well pump and can be used as a fixed valve or a movable valve. As shown in fig. 1 to 4, the valve structure of the embodiment of the present disclosure may include a valve cover 1, a valve seat 2, a blocking member 3, a guide post 4, a pressing sleeve 5, and a sealing member 6, wherein:
the valve housing 1 has a first end and a second end passing therethrough. The second end is provided with a fixing part 101 which is provided with a guide hole and an oil passing hole 1011 running through along the axial direction of the valve cover 1.
The valve seat 2 has a bottom end portion and a top end portion which are penetrated, the top end portion is in sealing fit with the second end, and the bottom end portion is positioned outside the second end.
The plugging piece 3 is arranged in the valve cover 1, the plugging piece 3 is a rotary body and comprises a bottom surface 31 and a side surface 32, the side surface 32 gradually shrinks towards the first end of the valve cover 1, namely the cross section of the side surface 32 gradually shrinks towards the first section, the side surface 32 movably abuts against the top end part of the valve seat 2, and the bottom surface 31 is larger than the inner diameter of the top end part and faces the second end.
One end of the guide post 4 is connected to the bottom surface 31 of the closing member 3, and the other end slidably passes through the guide hole.
The pressing sleeve 5 is slidably sleeved on the guide post 4 and is located on one side of the bottom surface 31 of the blocking piece 3 close to the second end of the valve cover 1.
The sealing element 6 is sleeved outside the guide post 4 and is positioned between the pressing sleeve 5 and the bottom surface 31 of the plugging element 3, the edge of the sealing element 6 is provided with a flange 61 which surrounds the bottom surface 31 and is abutted against the top end part of the valve seat 2, and the sealing element 6 is made of elastic material.
In the valve structure of the embodiment of the present disclosure, since the block piece 3 is a solid of revolution, sealing can be achieved by abutting the side surface 32 of the block piece 3 against the top end portion of the valve seat 2; simultaneously, because bottom surface 31 has set up elastic material's sealing member 6, under the effect of oil pressure, press cover 5 can be with to the extrusion of valve seat 2, make the turn-ups 61 of sealing member 6 and the sealed cooperation of terminal surface at the top portion of valve seat 2 to realize twice and seal, make sealed effect promote, even if when there is the clearance that foreign particles caused between side 32 of shutoff piece 3 and valve seat 2, still can guarantee sealed effect, prevent that the oil from backflowing from leaking, be favorable to improving the oil recovery volume. If the plugging piece 3 is separated from the valve seat 2 under the action of oil pressure, the flow of the oil is not influenced. Furthermore, the guide post 4 can guide the plug 3 to move along the axial direction of the valve cover 1, so that the plug 3 is prevented from deflecting. The oil passing hole 1011 can be used for oil to pass through.
The following provides a detailed description of the various parts of the valve structure of the embodiments of the present disclosure:
as shown in fig. 1, the valve cover 1 may be a cylindrical structure with two through ends, one end of which is a first end and the other end of which is a second end. The cross section of the valve cover 1 may be circular, but may also be oval, rectangular, etc., and is not limited herein.
The fixing portion 101 is disposed in the second end, and the fixing portion 101 can be connected to the inner wall of the second end of the valve cover 1 in a sealing manner, for example, by screwing, or the like, or can be integrally formed with the valve cover 1, which is not limited herein. Meanwhile, the fixing portion 101 is provided with a guide hole and an oil passing hole 1011 penetrating in the axial direction of the valve cover 1. The guide hole may be located at the center of the fixing portion 101, the oil passing holes 1011 may be located at the periphery of the guide hole, and the number of the oil passing holes 1011 may be multiple, for example, three, four, five, etc., and each of the oil passing holes 1011 may be uniformly distributed around the guide hole.
As shown in fig. 1, the valve seat 2 may have a bottom end portion and a top end portion, and the bottom end portion and the top end portion are communicated through a passage. The top end of the valve seat 2 can extend into the second end of the valve cover 1 and can be in sealing engagement with the inner wall of the valve cover 1, for example, the top end can be screwed with the inner wall of the valve cover 1. Meanwhile, in order to limit the position of the valve cover 1 and the valve seat 2, the inner wall of the valve cover 1 is provided with a first boss 102, the outer circumferential surface of the valve seat 2 is provided with a second boss 2021 in the area outside the valve cover 1, the top end of the valve seat 2 abuts against the first boss 102, and the first end of the valve cover 1 abuts against the second boss 2021.
The valve seat 2 can be formed by butt joint of a plurality of seat bodies which are axially distributed, and each seat body is communicated. For example, as shown in fig. 1, the valve seat 2 may include a first seat 201 and a second seat 202, wherein:
the first seat 201 and the second seat 202 may be both cylindrical structures with two ends penetrating, but the inner diameters of the two seats may be different. The first seat 201 is located in the valve cover 1, one end of the second seat 202 abuts against the first seat 201, and the other end extends from the first end of the valve cover 1 to the outside of the valve cover 1. One end of the first seat 201 far away from the second seat 202 belongs to the top end of the valve seat 2, and one end of the second seat 202 far away from the first seat 201 belongs to the bottom end of the valve seat 2.
As shown in fig. 1 to 3, the blocking member 3 is a solid of revolution and includes a bottom surface 31 and a side surface 32, the bottom surface 31 may be a plane, and the side surface 32 may surround the bottom surface 31 for a circle. For example, the blocking element 3 may be a segment structure, the bottom surface of which is the bottom surface 31 of the blocking element 3, and the spherical cap of which is the side surface 32; alternatively, the closing member 3 may have other shapes, such as a conical structure, the bottom surface of which is the bottom surface 31 of the closing member 3, and the tapered surface of which is the side surface 32.
The plugging piece 3 is movably arranged in the valve cover 1, the side surface 32 is movably abutted to the top end portion of the valve seat 2, the bottom surface 31 is larger than the inner diameter of the top end portion of the valve seat 2 and faces the second end of the valve cover 1, and the plugging piece 3 is prevented from sliding into the valve seat 2. When the side surface 32 abuts against the top end of the valve seat 2, the top end can be closed to block the flow of oil, and when the side surface 32 is separated from the top end, the top end can be opened to allow the flow of oil.
The side surface 32 of the block piece 3 may be provided with a screw hole 321, for example, the screw hole 321 may be located at the apex position when the side surface 32 is in the shape of a spherical cap. Can be used for being connected with the weight part by screw thread to increase the pressure of the plugging part 3 on the valve seat 2.
As shown in fig. 1, one end of the guiding post 4 can be connected with the bottom surface 31 of the blocking piece 3, and the other end can slidably penetrate through the guiding hole of the fixing portion 101, so that the guiding post 4 can reciprocate along the guiding hole to guide the movement of the blocking piece 3, so as to guide the axial movement of the blocking piece 3 along the valve cover 1, and prevent the blocking piece 3 from deflecting in the moving process and being incapable of being in sealing contact with the valve seat 2.
As shown in fig. 1-3, the bottom surface 31 of the block piece 3 may have a connecting rod, and one end of the guide post 4 near the block piece 3 is provided with an axially extending connecting hole, which may be a blind hole, into which the connecting rod extends and is threadedly connected to the connecting hole, thereby detachably connecting the guide post 4 to the block piece 3. Of course, the guide post 4 may also be directly inserted into the block piece 3 and screwed, and the guide post 4 may also be integrally formed with the block piece 3, and the connection manner of the guide post 4 and the block piece 3 is not particularly limited.
The pressing sleeve 5 is slidably sleeved on the guide post 4 and is located on one side of the bottom surface 31 of the blocking piece 3 close to the second end of the valve cover 1, and the pressing sleeve 5 can extrude the sealing piece 6 to the valve seat 2 under the action of oil pressure. The pressing sleeve 5 may be made of metal and have a density weight greater than that of the sealing member 6 so as to press the sealing member 6.
As shown in fig. 1 and 4, the sealing member 6 is made of an elastic material, such as rubber. The sealing element 6 is sleeved outside the guide post 4 and is positioned between the pressing sleeve 5 and the bottom surface 31 of the plugging member 3, and can be pressed by the pressing sleeve 5. The edge of the sealing element 6 is provided with a flange 61 extending towards the valve seat 2, the flange 61 can be in an annular structure and surrounds the bottom surface 31, the flange 61 abuts against the top end part of the valve seat 2, sealing matching is achieved, and sealing is further performed on the basis that the plugging element 3 is sealed with the valve seat 2.
In order to improve the sealing effect and facilitate the contact between the turned-over edge 61 and the end face of the top end of the valve seat 2, the surface of the turned-over edge 61 near the top end of the valve seat 2 may have an annular rib 611, and the annular rib 611 surrounds the bottom surface 31 of the blocking piece 3. The cross section of the annular rib 611 may be an arc, that is, the surface of the annular rib 611 abutting against the top end portion is an arc, or the cross section of the annular rib 611 may be a rectangle or other figures. In order to improve the sealing effect, the annular rib 611 may be provided in a plurality and concentrically arranged around the bottom surface 31, so as to form a plurality of seals, further preventing oil leakage.
When the seal 6 is pressed toward the valve seat 2, the annular rib 611 can be tightly fitted to the end surface of the tip end portion of the valve seat 2, and in this case, the annular rib 611 can prevent oil leakage even if the side surface 32 is in clearance with the valve seat 2. When the blocking piece 3 is pressed towards the second end of the valve cover 1, the sealing piece 6 can be driven to move towards the second end synchronously, and the side surface 32 and the annular convex rib 611 are separated from the valve seat 2, so that the petroleum can enter.
As shown in fig. 5-8, the present disclosure also provides an oil well pump, which includes a pump barrel 100, a plunger 200, a first valve and a second valve, wherein:
the pump barrel 100 has an oil inlet end and an oil outlet end therethrough. A plunger 200 is slidably disposed within the pump barrel 100. The first valve is fixedly butted at the oil inlet end. The second valve is disposed in the pump barrel 100 and is coupled to the plunger 200 at an end thereof near the oil inlet end.
At least one of the first valve and the second valve is the valve structure of any of the above embodiments. If the first valve is in the valve structure, the second end of the valve cover 1 of the first valve is fixedly butted with the oil inlet end along the axial direction; if the second valve is in the valve structure, the second end of the valve cover 1 of the second valve is fixedly butted with the plunger 200 along the axial direction.
In the oil well pump disclosed by the embodiment of the disclosure, the first valve is a fixed valve, and the second valve is a moving valve; when the plunger 200 moves towards the oil outlet end, the oil well pump is in an up stroke, the pressure in the pump cylinder 100 is reduced to form negative pressure, the first valve can be opened, and oil enters the pump cylinder 100 from the oil inlet end; when the plunger 200 moves towards the oil inlet end, the oil pump is in a down stroke, the pressure in the pump cylinder 100 is increased, the second valve is opened, the first valve is closed, and the oil is output from the oil outlet end. Because at least one of the first valve and the second valve adopts the valve structure of the embodiment, the sealing performance can be improved, thereby preventing the oil from flowing back and improving the oil extraction efficiency. The specific principle can refer to the embodiment of the valve structure, and the detailed description is omitted.
The pump cylinder 100 and the plunger 200 are both of a cylindrical structure with both ends penetrating, the pump cylinder 100 can be placed in the ground, and the plunger 200 is slidably fitted in the pump cylinder 100 so as to be capable of axially reciprocating. Further, in order to prevent the pump barrel 100 from being worn, a bush 300 may be fixed in the pump barrel 100, and the plunger 200 may be disposed in the bush 300 and slidably engaged with an inner wall of the bush 300.
In an embodiment, the first valve and the second valve are both valve structures of the above embodiment, as shown in fig. 6, the second end of the valve cover 1 of the first valve is fixedly butted with the oil inlet end of the pump barrel 100 through the first pressure cap 400 along the axial direction, specifically, two ends of the first pressure cap 400 are through, one end of the first pressure cap is sleeved outside the oil inlet end of the pump barrel 100, and the other end of the first pressure cap is sleeved outside the second end of the valve cover 1 of the first valve. As shown in fig. 7, the second end of the second valve cover 1 is fixedly butted against the end of the plunger 200 near the oil inlet end in the axial direction.
As shown in fig. 5 and 8, the oil pump according to the embodiment of the present disclosure further includes a third valve, the third valve is disposed in the pump barrel 100 and is fixedly abutted to an end of the plunger 200 far from the oil inlet end, and both the third valve and the second valve are connected to the plunger 200 and are moving valves, so that the third valve and the second valve have the same switching state, but the third valve is added on the basis of the second valve, so that the oil can be further prevented from flowing back.
Further, as shown in fig. 8, the third valve may also adopt the valve structure of the above embodiment, and the bottom end portion of the valve seat 2 of the third valve may be fixedly abutted with the plunger 200 in the axial direction. In addition, the oil outlet end of the pump barrel 100 can be sleeved with a second pressing cap 500, two ends of the second pressing cap 500 are communicated, the third valve is located in the second pressing cap 500, and the bottom end of the valve seat 2 of the third valve is fixedly butted with the plunger 200 along the axial direction.
In addition, if the first valve, the second valve, and the third valve are all the valve structures of the above embodiment, the first valve, the second valve, and the third valve may be different embodiments of the valve structures, and are not limited to be identical.
In one embodiment, as shown in fig. 9, a ring groove 2001 is provided on the outer periphery of the plunger 200, the ring groove 2001 is located on the side of the second valve away from the first valve, the bottom surface of the ring groove 2001 is a tapered surface gradually converging toward the second valve, and a seal ring 600 sealingly engaged with the pump barrel 100 is provided in the ring groove 2001.
The operation of the oil well pump according to the embodiment of the present disclosure will be described below by taking the valve structure of the above embodiment as an example, where the first valve, the second valve, and the third valve are all:
the pump barrel 100 is vertically arranged on the ground, and the first valve, the second valve and the third valve are arranged from bottom to top.
When the plunger 200 moves towards the oil outlet end, namely the oil well pump is in an up stroke, the pressure in the pump cylinder 100 is reduced to form negative pressure, so that the plugging piece 3 of the first valve is separated from the valve seat 2, the first valve is opened, and the oil inlet end is opened; meanwhile, the plugging pieces 3 of the second valve and the third valve are respectively contacted with the corresponding valve seats 2, so that the second valve and the third valve are closed; at this time, oil may enter the pump barrel 100 from the oil inlet end, and oil between the second valve and the third valve is lifted.
When the plunger 200 moves to the oil inlet end, namely when the oil well pump is in the downstroke, the pressure in the pump cylinder 100 increases, the oil entering the pump cylinder 100 can press the plugging piece 3 to the valve seat 2, and the flanging 61 of the sealing piece 6 is abutted to the top end part of the valve seat 2, so that two-way sealing is realized, the oil in the pump cylinder 100 is prevented from flowing back from the oil inlet end to cause leakage, and the oil extraction efficiency is improved. Meanwhile, the plugging pieces 3 of the second valve and the third valve are both jacked open and separated from the corresponding valve seats 2, so that the second valve and the third valve are opened; at this time, oil can be output from the oil outlet end.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A valve structure, comprising:
the valve cover is provided with a first end and a second end which are communicated, a fixing part is arranged in the second end, and the fixing part is provided with a guide hole and an oil passing hole which are communicated along the axial direction of the valve cover;
a valve seat having a bottom end portion and a top end portion therethrough, the top end portion being sealingly engaged within the first end, the bottom end portion being located outside the first end;
the blocking piece is a rotary body and comprises a bottom surface and a side surface surrounding the bottom surface, the side surface gradually shrinks towards the first end and movably abuts against the top end part of the valve seat, and the bottom surface is larger than the inner diameter of the top end part and faces towards the second end;
one end of the guide post is connected with the bottom surface, and the other end of the guide post can slidably penetrate through the guide hole;
the pressing sleeve is slidably sleeved on the guide post and is positioned on one side of the bottom surface close to the second end;
the sealing element is sleeved outside the guide column and located between the pressing sleeve and the bottom surface, a flange which surrounds the bottom surface and abuts against the top end portion is arranged on the edge of the sealing element, and the sealing element is made of elastic materials.
2. A valve structure according to claim 1, characterized in that the blocking piece is a segment structure, the bottom surface is a bottom surface of the segment structure, and the side surfaces are spherical crowns of the segment structure.
3. A valve structure according to claim 1, wherein the surface of the cuff abutting the top end has at least one annular ridge around the bottom surface.
4. A valve structure according to claim 3, wherein the surface of the annular rib which abuts the tip portion is a curved surface.
5. A valve structure according to claim 1, wherein the guide post is of one-piece construction with the blocking member.
6. The valve structure as claimed in claim 1, wherein the bottom surface has a connecting rod, the guide post has a connecting hole, and the connecting rod is fitted into the connecting hole and detachably connected to the guide post.
7. An oil-well pump, its characterized in that includes:
the pump cylinder is provided with a penetrating oil inlet end and a penetrating oil outlet end;
the plunger is slidably arranged in the pump cylinder;
the first valve is fixedly butted at the oil inlet end;
the second valve is arranged in the pump barrel and fixed at one end of the plunger close to the oil inlet end;
at least one of the first valve and the second valve is a valve structure as set forth in any one of claims 1-6; if the first valve is in the valve structure, the second end of the valve cover of the first valve is fixedly butted with the oil inlet end along the axial direction; if the second valve is in the valve structure, the second end of the valve cover of the second valve is fixedly butted with the plunger along the axial direction.
8. The pump of claim 7, further comprising:
and the third valve is arranged in the pump barrel and is fixedly butted with one end, far away from the oil inlet end, of the plunger.
9. The pump of claim 8, wherein the third valve is of the valve structure, and a bottom end of the valve seat of the third valve is axially and fixedly abutted against the plunger.
10. The defueling pump of claim 7, wherein the plunger is provided with a ring groove at its periphery, the ring groove is located at a side of the second valve away from the first valve, and a bottom surface of the ring groove is a tapered surface gradually shrinking toward the second valve; and a sealing ring which is in sealing fit with the pump barrel is arranged in the ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911013556.3A CN110617211A (en) | 2019-10-23 | 2019-10-23 | Oil well pump and valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911013556.3A CN110617211A (en) | 2019-10-23 | 2019-10-23 | Oil well pump and valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110617211A true CN110617211A (en) | 2019-12-27 |
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ID=68926660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911013556.3A Pending CN110617211A (en) | 2019-10-23 | 2019-10-23 | Oil well pump and valve structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN110617211A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425380A (en) * | 2020-04-21 | 2020-07-17 | 卫玮 | Oil well pump and valve structure |
| CN111425379A (en) * | 2020-04-21 | 2020-07-17 | 卫玮 | Oil well pump and valve structure |
| CN115163478A (en) * | 2022-08-15 | 2022-10-11 | 烟台杰瑞石油装备技术有限公司 | Flow divider assembly, valve box and plunger pump |
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| CN2426528Y (en) * | 1999-03-28 | 2001-04-11 | 彭守斌 | Slip sleeve bottom valve type viscous crude pump |
| CN1730943A (en) * | 2005-09-12 | 2006-02-08 | 中国石油天然气股份有限公司 | Negative pressure oil-well pump |
| CN202833057U (en) * | 2012-05-31 | 2013-03-27 | 中国石油化工集团公司 | Sand prevention oil-well pump |
| US20180010601A1 (en) * | 2016-07-07 | 2018-01-11 | Cameron International Corporation | Mud pump sealing assembly |
| CN211449006U (en) * | 2019-10-23 | 2020-09-08 | 卫玮 | Oil well pump and valve structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426528Y (en) * | 1999-03-28 | 2001-04-11 | 彭守斌 | Slip sleeve bottom valve type viscous crude pump |
| CN1730943A (en) * | 2005-09-12 | 2006-02-08 | 中国石油天然气股份有限公司 | Negative pressure oil-well pump |
| CN202833057U (en) * | 2012-05-31 | 2013-03-27 | 中国石油化工集团公司 | Sand prevention oil-well pump |
| US20180010601A1 (en) * | 2016-07-07 | 2018-01-11 | Cameron International Corporation | Mud pump sealing assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111425380A (en) * | 2020-04-21 | 2020-07-17 | 卫玮 | Oil well pump and valve structure |
| CN111425379A (en) * | 2020-04-21 | 2020-07-17 | 卫玮 | Oil well pump and valve structure |
| CN115163478A (en) * | 2022-08-15 | 2022-10-11 | 烟台杰瑞石油装备技术有限公司 | Flow divider assembly, valve box and plunger pump |
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