CN214366676U

CN214366676U - Valve structure and oil-well pump

Info

Publication number: CN214366676U
Application number: CN202120102364.6U
Authority: CN
Inventors: 卫玮
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-10-08
Anticipated expiration: 2031-01-14

Abstract

The utility model relates to an oil development technical field provides a valve structure and oil-well pump. The valve structure comprises a valve cover, a valve seat, a valve ball, a sealing element and a guide assembly; 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 an oil passing hole which is communicated along the axial direction of the valve cover is arranged on the fixing part; 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 valve ball is a sphere, the diameter of the valve ball is larger than the inner diameter of the top end part, and the valve ball is arranged in the valve cover and is rotatably abutted against the top end part of the valve seat; the sealing element cover is arranged on one side of the valve ball close to the second end, the edge of the sealing element is provided with a flanging which surrounds the valve ball and is abutted against the top end part, and the sealing element is made of elastic material; one end of the guide assembly is connected with the sealing element, and the guide assembly is used for providing guide for the axial movement of the valve ball and the sealing element along the valve cover. The oil recovery can be improved.

Description

Valve structure and oil-well pump

Technical Field

The utility model relates to an oil development technical field especially relates to a valve structure and oil-well pump including this 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, the valve ball is worn seriously, so that a gap exists between the valve ball and the valve seat, and pumped oil may flow back, namely leak, to affect the oil extraction efficiency.

The above information disclosed in the background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art that is known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the more serious not enough of above-mentioned prior art's valve ball wearing and tearing, provide a less valve structure of valve ball loss and the oil-well pump including this valve structure.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

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 an oil passing hole which is communicated along the axial direction of the valve cover is arranged on the fixing part;

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 valve ball is arranged as a sphere, the diameter of the valve ball is larger than the inner diameter of the top end part, and the valve ball is arranged in the valve cover and is rotatably abutted against the top end part of the valve seat;

the sealing element covers one side, close to the second end, of the valve ball, a flange which surrounds the valve ball 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;

and one end of the guide assembly is connected with the sealing element, and the guide assembly is used for guiding the valve ball and the sealing element to move along the axial direction of the valve cover.

In an exemplary embodiment of the present disclosure, the guide assembly includes:

one end of the guide post is connected with the sealing element and extends to the second end along the axial direction of the valve cover;

the guide plate is connected to the other end, opposite to the guide post, of the guide post, the guide plate is slidably arranged in the valve cover, and the guide plate is provided with an oil through hole.

In an exemplary embodiment of the present disclosure, the guide assembly further includes:

and the extension plate is arranged on the periphery of the guide plate and extends along the axial direction of the valve cover.

In an exemplary embodiment of the present disclosure, a guide hole penetrating in an axial direction of the valve cover is provided on the fixing portion, and the guide assembly includes:

and one end of the guide post is connected with the sealing element, and the opposite end of the guide post can slidably penetrate through the guide hole.

In an exemplary embodiment of the disclosure, a surface of the cuff abutting the tip portion has at least one ring of annular ridge surrounding the valve ball.

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 valve structure further includes:

and the sealing ring is arranged between the valve seat and the valve cover.

In an exemplary embodiment of the disclosure, a blind hole is provided at a side of the sealing member adjacent to the valve ball, and a part of the valve ball is located in the blind hole.

In an exemplary embodiment of the present disclosure, an end of the side of the sealing member near the second end is tapered toward the second end.

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 valve structure is arranged in the pump barrel, and the second end of the valve cover of the valve structure is fixedly butted with the oil inlet end of the pump barrel along the axial direction.

According to the above technical scheme, the utility model discloses possess at least one in following advantage and the positive effect:

the valve structure of the utility model realizes sealing by the butting of the valve ball and the top end part of the valve seat; simultaneously, because the one side that is close to the second end of valve ball has set up the sealing member of elastic material, under the effect of oil pressure, the turn-ups of sealing member can cooperate with the end face seal of this top portion to realize twice and seal, make sealed effect promote. In addition, the valve ball is a ball body and is not connected with other parts, so that the valve ball can rotate, the contact position of the valve ball and the valve seat can be changed, the abrasion of the valve seat to a certain specific position of the valve ball is reduced, the sealing performance is improved, the backflow leakage of petroleum is prevented, and the improvement of the oil extraction amount is facilitated. In addition, the guide assembly can guide the valve ball and the sealing element to move along the axial direction of the valve cover, and the valve ball and the sealing element are prevented from deflecting.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

FIG. 1 is a schematic diagram of an exemplary embodiment of a valve structure of the present invention;

FIG. 2 is a schematic structural view of another exemplary embodiment of a valve structure of the present invention;

FIG. 3 is a schematic view of the seal of FIGS. 1 and 2;

FIG. 4 is a partially enlarged schematic view of a portion indicated by H in FIG. 1;

fig. 5 is a schematic structural view of an exemplary embodiment of the oil pump of the present invention;

fig. 6 is a schematic structural view of another exemplary embodiment of the oil pump of the present invention.

The reference numerals of the main elements in the figures are explained as follows:

1. a valve cover; 11. a fixed part; 111. an oil passing hole; 112. a guide hole; 12. a first boss;

2. a valve seat; 21. a first seat body; 22. a second seat body; 221. a second boss;

3. a Versailles ball;

4. a seal member; 41. flanging; 411. an annular rib;

5. a guide assembly; 51. a guide post; 51a, a guide post; 52. a guide plate; 53. an extension plate; 54. an oil through hole;

6. a seal ring;

100. a valve structure; 200. a pump barrel.

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.

The present exemplary embodiment firstly provides a valve structure, referring to fig. 1, 2, 3 and 4, which are schematic structural diagrams of the valve structure of the present invention, the valve structure may include a valve cover 1, a valve seat 2, a valve ball 3, a sealing element 4 and a guiding component 5; the valve cover 1 is provided with a first end and a second end which are communicated, a fixing part 11 is arranged in the second end, and an oil passing hole 111 which is communicated along the axial direction of the valve cover 1 is arranged on the fixing part 11; the valve seat 2 has a bottom end portion and a top end portion which are penetrated, the top end portion is in sealed fit with the first end, and the bottom end portion is positioned outside the first end; the valve ball 3 is a sphere, the diameter of the valve ball 3 is larger than the inner diameter of the top end part, the valve ball 3 is arranged in the valve cover 1 and is rotatably abutted against the top end part of the valve seat 2; the sealing element 4 is covered on one side of the valve ball 3 close to the second end, a flange 41 which surrounds the valve ball 3 and is abutted to the top end part is arranged on the edge of the sealing element 4, and the sealing element 4 is made of elastic material; one end of a guide assembly 5 is connected with the sealing element 4, and the guide assembly 5 is used for guiding the valve ball 3 and the sealing element 4 to move along the axial direction of the valve cover 1.

The valve ball 3 is abutted against the top end part of the valve seat 2 to realize sealing; meanwhile, because the sealing element 4 made of elastic materials is arranged on one side, close to the second end, of the valve ball 3, the flanging 41 of the sealing element 4 can be matched with the end face of the top end portion in a sealing mode under the action of oil pressure, two sealing is achieved, and the sealing effect is improved. In addition, because the valve ball 3 is a sphere and the valve ball 3 is not connected with any other parts, the valve ball 3 can rotate, so that the contact position of the valve ball 3 and the valve seat 2 can be changed, the abrasion of the valve seat 2 to a certain specific position of the valve ball 3 is reduced, the sealing property is improved, the backflow and leakage of petroleum are prevented, and the improvement of the oil extraction amount is facilitated. In addition, the guide assembly 5 can guide the valve ball 3 and the sealing element 4 to move along the axial direction of the valve cover 1, and the valve ball 3 and the sealing element 4 are prevented from deflecting.

In the exemplary embodiment shown in fig. 1, the valve cover 1 may be a cylindrical structure with two ends penetrating, 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 11 is disposed in the second end, and the fixing portion 11 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. The fixing portion 11 is provided with a guide hole 112 and an oil passing hole 111 penetrating in the axial direction of the valve cover 1. The guide hole 112 may be located at the center of the fixing portion 11, the oil passing holes 111 may be located at the periphery of the guide hole 112, and the number of the oil passing holes 111 may be plural, for example, three, four, five, etc., and each of the oil passing holes 111 may be uniformly distributed around the guide hole 112.

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 conveniently, the inner wall of the valve cover 1 is provided with a first boss 12, the outer peripheral surface of the valve seat 2 is provided with a second boss 221 in the area outside the valve cover 1, the top end of the valve seat 2 is abutted against the first boss 12, and the first end of the valve cover 1 is abutted against the second boss 221.

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 body 21 and a second seat body 22, wherein:

the first seat 21 and the second seat 22 may be both cylindrical structures with two ends penetrating, but the inner diameters of the two seats may be different. The first seat body 21 is located in the valve cover 1, one end of the second seat body 22 is abutted against the first seat body 21, and the other end of the second seat body extends out of the valve cover 1 from the first end of the valve cover 1. One end of the first seat 21 far away from the second seat 22 belongs to the top end of the valve seat 2, and one end of the second seat 22 far away from the first seat 21 belongs to the bottom end of the valve seat 2.

An annular groove is formed in the periphery of the first seat body 21, the axial section of the annular groove can be rectangular, a sealing ring 6 is arranged in the annular groove, and the sealing ring 6 seals a gap between the first seat body 21 and the valve cover 1.

As shown in fig. 1, the valve ball 3 is a sphere, the diameter of the valve ball 3 is larger than the inner diameter of the top end, and the valve ball 3 is disposed in the valve cover 1 and rotatably abuts against the top end of the valve seat 2. Because the valve ball 3 is not connected with any other parts, the valve ball 3 can rotate by taking the central shaft of the valve cover 1 as a central shaft and also can rotate by taking a straight line perpendicular to the central shaft of the valve cover 1 as a central shaft, the contact position of the valve ball 3 and the valve seat 2 is changed, the abrasion of the valve seat 2 to a certain specific position of the valve ball 3 is reduced, and the sealing property is improved.

The sealing element 4 covers one side of the valve ball 3 close to the second end, and the edge of the sealing element 4 is provided with a flange 41 which surrounds the valve ball 3 and is abutted against the top end part. The sealing member 4 is made of an elastic material, such as rubber. The blind hole is formed in one side, close to the valve ball 3, of the sealing element 4, the diameter of the blind hole is slightly larger than that of the valve ball 3, the valve ball 3 can rotate, and part of the valve ball 3 is located in the blind hole, so that the sealing element 4 covers one side, close to the second end, of the valve ball 3. The edge of the sealing element 4 is provided with a flange 41 extending towards the valve seat 2, the flange 41 can be in an annular structure and surrounds the valve ball 3, and the flange 41 is abutted against the top end part of the valve seat 2, so that sealing matching is realized, and sealing is further performed on the basis that the valve ball 3 is sealed with the valve seat 2.

In order to improve the sealing effect and facilitate the contact between the flange 41 and the end face of the top end of the valve seat 2, the surface of the flange 41 near the top end of the valve seat 2 may have an annular rib 411, and the annular rib 411 surrounds the valve ball 3. The cross section of the annular protruding rib 411 may be arc-shaped, that is, the surface of the annular protruding rib 411 abutting against the top end portion is arc-shaped, or the cross section of the annular protruding rib 411 may be rectangular or other figures. In order to improve the sealing effect, the number of the annular ribs 411 may be multiple and concentrically arranged around the valve ball 3, so as to form multiple seals, and further prevent oil leakage.

When the sealing member 4 is pressed toward the valve seat 2, the annular rib 411 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 411 can prevent oil leakage even when the valve ball 3 has a gap with the valve seat 2. When the valve ball 3 is pressed towards the second end of the valve cover 1, the sealing element 4 can be driven to synchronously move towards the second end, and the valve ball 3 and the annular convex rib 411 are separated from the valve seat 2, so that the petroleum can enter.

In order to facilitate the flow of oil, the side surface of the sealing member 4 is configured to be gradually contracted toward the second end, for example, one end of the sealing member 4, which is close to the valve cover 1 and is close to the second end, may be configured to be an inclined surface, and the inclined surface is gradually contracted toward the second end, and may be configured to be an arc surface.

To avoid the valve ball 3 and the seal 4 from deflecting during movement. In the present exemplary embodiment, a guide assembly 5 is further provided, and the guide assembly 5 may include a guide post 51a, one end of the guide post 51a is connected with the sealing member 4, and the other end of the guide post slidably passes through the guide hole 112, so that the guide post 51a can reciprocate along the guide hole 112 to guide the movement of the valve ball 3 and the sealing member 4, so as to guide the valve ball 3 to move along the axial direction of the valve cover 1, and prevent the valve ball 3 from deflecting during the movement and being unable to be in sealing abutment with the valve seat 2.

Referring to fig. 2, a schematic diagram of another exemplary embodiment of a valve structure of the present invention is shown; this exemplary embodiment differs from the exemplary embodiment shown in fig. 1 mainly in that: the guide assembly 5 is structurally different. The method comprises the following specific steps:

in the present exemplary embodiment, the fixing portion 11 is not provided with the guide hole 112, and only the oil passing hole 111 is provided. The guide assembly 5 may include a guide post 51, a guide plate 52, and an extension plate 53. One end of the guide post 51 is connected to the sealing member 4, the guide post 51 extends toward the second end in the axial direction of the valve cover 1, and the opposite end of the guide post 51 is connected to the guide plate 52. The guide post 51 may be coupled to a central position of the guide plate 52. The guide plate 52 is provided with a plurality of oil holes 54, for example, three, four, five, etc., the oil holes 54 are provided, and the oil holes 54 are uniformly distributed around the guide post 51, so that the oil can flow toward the fixing portion 11 side through the oil holes 54. The diameter of the guide plate 52 is slightly smaller than the inner diameter of the valve cover 1, so that the guide plate 52 can reciprocate along the inner wall of the valve cover 1, the movement of the valve ball 3 and the sealing element 4 is guided, the valve ball 3 is guided to move along the axial direction of the valve cover 1, and the valve ball 3 is prevented from deflecting in the moving process and being incapable of being in sealing contact with the valve seat 2.

Furthermore, an extension plate 53 may be further provided at the periphery of the guide plate 52, the extension plate 53 extends in the axial direction of the valve cover 1, and the extension plate 53 increases the axial length of the guide assembly 5, thereby providing a more stable guide for the movement of the valve ball 3 and the sealing member 4.

The guide member 5 also functions as a weight. When the piston of the oil well pump moves upwards, the guide assembly 5 is prevented from inclining due to the larger gravity of the guide assembly 5; when the piston of the oil well pump moves downwards, the guide assembly 5 is easy to press down due to the large gravity of the guide assembly 5.

Further, this example embodiment still provides an oil-well pump, and this disclosed embodiment still provides an oil-well pump, as shown in fig. 5 and fig. 6, and the oil-well pump includes pump barrel 200, piston and valve structure 100, wherein:

the pump barrel 200 may include an oil inlet end and an oil outlet end, with the piston slidably disposed within the pump barrel 200. The valve structure 100 can be arranged in the pump barrel 200, and when the valve structure is used as a fixed valve, the second open end of the valve cover 1 of the valve structure 100 can be fixedly butted with the oil inlet end of the pump barrel 200 along the axial direction; when it is a floating valve, it can be disposed between the oil inlet end and the oil outlet end of the pump barrel 200, and the structural details and beneficial effects of the valve structure 100 can be found in any of the above embodiments, which are not described herein again.

The oil well pump can be provided with a plurality of valve structures which can be sequentially arranged from bottom to top along the axial direction of the pump barrel 200. For example, it may be three, a first valve, a second valve and a third valve. At least one of the first valve and the second valve is the valve structure 100 of any of the embodiments described above. If the first valve is the valve structure 100, the second end of the valve cover 1 of the first valve is fixedly butted with the oil inlet end of the pump cylinder 200 along the axial direction, and the second valve is arranged in the pump cylinder 200; if the second valve is the valve structure 100, the second end of the valve cover 1 of the second valve is fixedly butted with the piston along the axial direction. The third valve is arranged at the oil outlet end of the pump barrel 200 and is fixedly butted with one end of the piston far away from the oil inlet end.

The first valve, the second valve, and the third valve may be the valve structure 100 of the above embodiment, but the first valve, the second valve, and the third valve may be the valve structures 100 of different embodiments, and are not limited to being completely identical.

The following describes the operation of the oil pump according to the embodiment of the present disclosure:

the pump barrel 200 is vertically arranged underground, and the first valve, the second valve and the third valve are arranged from bottom to top. When oil is pumped, the piston moves upwards, the pressure in the pump barrel 200 is reduced, negative pressure is formed, the valve ball 3 of the first valve is separated from the valve seat 2, and therefore the oil inlet end is opened, and a channel is provided for the circulation of oil; meanwhile, the valve balls 3 of the second valve and the third valve are both in contact 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 200 from the oil inlet end, and oil between the second valve and the third valve is lifted. When the piston moves downwards, the pressure in the pump barrel 200 is increased, the valve ball 3 of the first valve moves downwards under the action of oil pressure, the side surface 32 of the valve ball 3 is abutted against the top end part of the valve seat 2, the valve ball 3 and the valve seat 2 are sealed, and the backflow of oil along a circulation channel is avoided. Meanwhile, the valve balls 3 of the second valve and the third valve are pushed 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. In this process, the seal ring 6 can seal the assembly gap between the inner circumferential surface of the valve cover 1 and the outer circumferential surface of the valve seat 2, thereby preventing oil from flowing back and leaking from the assembly gap between the valve seat 2 and the valve cover 1 and improving the oil extraction.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments, and the features discussed in connection with the embodiments are interchangeable, if possible. In the description above, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

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". Other relative terms, such as "high", "low", "top", "bottom", and the like, are also intended to have similar meanings. 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.

In this specification, the terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising," "including," 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.

It is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the description. The present invention is capable of other embodiments and of being practiced and carried out in a variety of ways. The foregoing variations and modifications fall within the scope of the present invention. It will be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present invention. The embodiments set forth herein explain the best modes known for practicing the invention and will enable others skilled in the art to utilize the invention.

Claims

1. A valve structure, comprising:

2. The valve structure of claim 1, wherein the guide assembly comprises:

3. The valve structure of claim 2, wherein the guide assembly further comprises:

4. A valve structure as claimed in claim 1, wherein the fixing portion is provided with a guide hole penetrating in an axial direction of the valve cover, and the guide member includes:

5. A valve structure according to claim 1, wherein the surface of the cuff abutting the tip portion has at least one annular ridge surrounding the valve ball.

6. A valve structure according to claim 5, wherein the surface of the annular ridge that abuts the top end is a curved surface.

7. A valve structure according to claim 1, further comprising:

and the sealing ring is arranged between the valve seat and the valve cover.

8. A valve structure according to claim 1, characterized in that the side of the sealing element adjacent to the valve ball is provided with a blind hole, part of the valve ball being located in the blind hole.

9. A valve structure as claimed in claim 1, wherein the side of the seal member tapers towards the second end at an end thereof adjacent the second end.

10. An oil-well pump, its characterized in that includes:

the plunger is slidably arranged in the pump cylinder;

the valve structure of any one of claims 1 to 9, wherein the valve structure is disposed in the pump barrel, and the second end of the valve cover of the valve structure is fixedly butted against the oil inlet end of the pump barrel along the axial direction.