CN110836180B

CN110836180B - Valve and pump assembly with same

Info

Publication number: CN110836180B
Application number: CN201810930187.3A
Authority: CN
Inventors: 陈新志; 王惠请; 鲁霖懋; 崔容占; 张辉
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2018-08-15
Filing date: 2018-08-15
Publication date: 2022-05-10
Anticipated expiration: 2038-08-15
Also published as: CN110836180A

Abstract

The invention provides a valve and a pump assembly with the same, wherein the valve comprises: the valve body is of a tubular structure, a liquid inlet is formed in the first end of the tubular structure, a liquid outlet is formed in the second end of the tubular structure, and a flow discharge port is formed in the side wall of the valve body; the valve core is movably arranged in the valve body and is provided with a first position for plugging the leakage port, and the valve core is provided with a second position for plugging the liquid inlet; when the valve core is positioned at the first position, the liquid inlet and the liquid outlet of the valve body are communicated, and when the valve core is positioned at the second position, the liquid outlet of the valve body is communicated with the drainage port. The technical scheme of the invention effectively solves the problem of motor burning caused by overlarge current when the pump in the prior art is started.

Description

Valve and pump assembly with same

Technical Field

The invention relates to the technical field of valves, in particular to a valve and a pump assembly with the valve.

Background

When an electric submersible centrifugal pump, an oil-submersible screw pump, an oil-submersible vane pump and the like are used for lifting a low-yield sand well and a sand outlet well, the low-yield well has low liquid flow rate and is low in the oil pipe, sand mud in crude oil is easy to settle, especially when the pump is stopped, the sand mud in the crude oil in the oil pipe can settle at the outlet of the pump to cause the blockage to bury the pump port, when the pump is started again, the settled sand at the pump port can cause large starting torque and high starting current, and the sand blockage can be caused in serious cases, so that the severe condition of burning a motor can be caused.

When the submersible screw pump is used for lifting thick oil, because the viscosity of the oil is high and the lifting resistance is high, the starting current is 2-3 times higher than the normal running current when the pump is started, and particularly when the pump is operated for a period of time and stopped and restarted, the problem that the pump is difficult to start is often faced.

Disclosure of Invention

The invention mainly aims to provide a valve and a pump assembly with the valve, so as to solve the problem that a motor is burnt due to overlarge current when a pump in the prior art is started.

In order to achieve the above object, according to one aspect of the present invention, there is provided a valve comprising: the valve body is of a tubular structure, a liquid inlet is formed in the first end of the tubular structure, a liquid outlet is formed in the second end of the tubular structure, and a flow discharge port is formed in the side wall of the valve body; the valve core is movably arranged in the valve body and is provided with a first position for plugging the leakage port, and the valve core is provided with a second position for plugging the liquid inlet; when the valve core is positioned at the first position, the liquid inlet and the liquid outlet of the valve body are communicated, and when the valve core is positioned at the second position, the liquid outlet of the valve body is communicated with the drainage port.

Further, the valve core comprises a sliding block, the sliding block is provided with a liquid passing channel, when the valve core is located at the first position, the outer wall of the sliding block seals the leakage port, and the liquid inlet is communicated with the liquid outlet through the liquid passing channel.

Further, the liquid passing channel comprises a liquid passing opening formed in the side wall of the sliding block and a hollow structure in the sliding block, and one end, close to the liquid inlet, of the sliding block is a blocking cover.

Further, the valve body comprises a first valve body section, a second valve body section and a third valve body section in sequence from the liquid inlet to the liquid outlet, the inner diameter of the first valve body section and the inner diameter of the third valve body section are smaller than the inner diameter of the second valve body section, the sliding block comprises a first sliding block section and a second sliding block section in sequence from the liquid inlet to the liquid outlet, the outer diameter of the first sliding block section is matched with the inner diameter of the first valve body section, and the outer diameter of the second sliding block section is matched with the inner diameter of the second valve body section.

Further, the liquid passing port is located on the side wall of the first sliding block section.

Furthermore, sealing rings are arranged on two sides of the second sliding block section, and when the sliding block is located at the first position, the discharge port is located between the sealing rings on the two sides of the second sliding block section.

Further, the case still includes the ball sealer, and the hollow structure of slider includes first cavity section, second cavity section and changeover portion, and the first cavity section is close to the inlet than the second cavity section, and the changeover portion is connected between first cavity section and the second cavity section, and the diameter of ball sealer is greater than the internal diameter of first cavity section, and the diameter of ball sealer is less than the internal diameter of second cavity section.

Further, the liquid passing port is closer to the liquid inlet than the transition section.

Furthermore, the second end of the sliding block is provided with a limiting part to limit the moving position of the sealing ball.

According to another aspect of the present invention, there is provided a pump assembly comprising a pump body and a valve, the valve being disposed at a liquid outlet of the pump body, the valve being as described above.

By applying the technical scheme of the invention, when the pump is started and conveys the fluid mixture, the valve core is pushed to move to the first position by the fluid mixture under the action of the power provided by the pump, so that the fluid mixture is continuously conveyed to the reasonable position. When the pump stops working, the valve core moves to the second position under the action of gravity, and at the moment, the fluid mixture above the drainage port flows out from the drainage port, so that most of the fluid mixture is guided to the outside of the pump, and the condition of burning the motor cannot occur when the pump is restarted. The technical scheme of the invention effectively solves the problem of motor burning caused by overlarge current when the pump in the prior art is started.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of a valve according to the invention.

Wherein the figures include the following reference numerals:

10. a valve body; 11. an upper valve body; 12. a lower valve body; 20. a valve core; 21. a slider; 22. a sealing ball; 100. a bleed port; 200. and a liquid passing channel.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

As shown in fig. 1, the valve of the present embodiment includes: a valve body 10 and a valve spool 20. The valve body 10 is a tubular structure, a first end of the tubular structure is a liquid inlet, a second end of the tubular structure is a liquid outlet, and a drain opening 100 is formed in the side wall of the valve body 10. The valve core 20 is movably arranged in the valve body 10, the valve core 20 has a first position for blocking the leakage port 100, and the valve core 20 has a second position for blocking the liquid inlet. When the valve core 20 is located at the first position, the liquid inlet and the liquid outlet of the valve body 10 are communicated, and when the valve core 20 is located at the second position, the liquid outlet of the valve body 10 is communicated with the drainage port 100.

By applying the technical scheme of the embodiment, when the pump is started and the pump delivers the fluid mixture, the fluid mixture pushes the valve core 20 to move to the first position under the action of the power provided by the pump, so that the fluid mixture is continuously delivered to the reasonable position. When the pump stops working, the valve core 20 moves to the second position under the action of gravity, and at the moment, the fluid mixture above the discharge port 100 flows out from the discharge port 100, so that most of the fluid mixture is guided to the outside of the pump, and the situation of motor burning cannot occur when the pump is restarted. The technical scheme of this embodiment has solved the problem of the burnt motor that leads to because the electric current is too big when the pump among the prior art starts effectively.

It is noted that the valve body 10 of the present embodiment includes an upper valve body 11 and a lower valve body 12, and the upper valve body 11 and the lower valve body 12 are sealingly connected by threads. So that the valve cartridge 20 is easily installed into the valve body 10.

As shown in fig. 1, in the technical solution of this embodiment, the valve core 20 includes a slider 21, the slider 21 has a liquid passing channel 200, when the valve core 20 is located at the first position, an outer wall of the slider 21 blocks the drain port 100, and the liquid inlet is communicated with the liquid outlet through the liquid passing channel 200. The slider 21 has a through-liquid channel 200, which enables the fluid mixture to flow through the valve body 10.

As shown in fig. 1, in the solution of the present embodiment, the liquid passing channel 200 includes a liquid passing port disposed on a side wall of the slide block 21 and a hollow structure inside the slide block 21, and one end of the slide block 21 close to the liquid inlet is a blocking cover. The structure has lower processing cost and is convenient to set. Specifically, the slider is cylindric, and the bottom of slider 21 has the shutoff lid and seals the bottom of slider 21, and the lateral wall of slider 21 has the liquid mouth of crossing, crosses the liquid mouth and is linked together with the hollow structure in the slider 21, and hollow structure is linked together from the upper portion and the liquid outlet of slider 21. When the valve core 20 is at the first position, the fluid mixture enters from the liquid inlet of the valve body 10, then enters the hollow structure through the liquid passing port of the slide block 21, enters the valve body 10 after exiting from the hollow structure, and finally flows out from the liquid outlet of the valve body 10.

As shown in fig. 1, in the technical solution of this embodiment, the valve body 10 sequentially includes a first valve body section, a second valve body section, and a third valve body section from the liquid inlet to the liquid outlet, both the inner diameter of the first valve body section and the inner diameter of the third valve body section are smaller than the inner diameter of the second valve body section, the slider 21 sequentially includes a first slider section and a second slider section from the liquid inlet to the liquid outlet, the outer diameter of the first slider section is adapted to the inner diameter of the first valve body section, and the outer diameter of the second slider section is adapted to the inner diameter of the second valve body section. The inner diameter of the first valve body section and the inner diameter of the third valve body section are both smaller than the inner diameter of the second valve body section, and the outer diameter of the first sliding block section is matched with the inner diameter of the first valve body section, so that the first valve body section and the third valve body section can limit the first sliding block section. So that the first slide block section can only move within the second valve body section, in particular there is a step transition between the first valve body section and the second valve body section, which is arranged on the upper valve body 11, and there is also a step transition between the second valve body section and the third valve body section, which is arranged on the lower valve body 12.

As shown in fig. 1, in the solution of this embodiment, the liquid passing port is located on the side wall of the first sliding block section. The outer diameter of the first sliding block section is matched with the inner diameter of the first valve body section, so that when the sliding block is located at the second position, the liquid passing port receives the sealing between the outer wall of the first sliding block section and the inner wall of the first valve body section. The above-described configuration ensures that, after the pump is stopped, the fluid mixture flows out of the discharge port 100 without settling into the pump or remaining in the pipe.

As shown in fig. 1, in the solution of the present embodiment, two sides of the second sliding block segment are provided with sealing rings, and when the sliding block 21 is located at the first position, the drainage port 100 is located between the sealing rings at the two sides of the second sliding block segment. The above structure ensures a tight seal. Specifically, the plurality of the drain openings 100 are provided at intervals, two seal rings are provided at intervals in the axial direction of the slider 21, and each drain opening 100 is located between the two seal rings. The provision of a plurality of bleed openings 100 ensures that there is less resistance to liquid flow.

As shown in fig. 1, in the technical solution of this embodiment, the valve core 20 further includes a sealing ball 22, the hollow structure of the slider 21 includes a first hollow section, a second hollow section and a transition section, the first hollow section is closer to the liquid inlet than the second hollow section, the transition section is connected between the first hollow section and the second hollow section, the diameter of the sealing ball 22 is greater than the inner diameter of the first hollow section, and the diameter of the sealing ball 22 is smaller than the inner diameter of the second hollow section. The structure ensures that the sealing effect of the liquid passing channel 200 is good, and the sealing ball 22 is matched and sealed with the sliding block 21 when the fluid mixture flows back. Of course, the sealing of the valve core has other forms, for example, the sealing ball 22 is directly matched with the slide block 21, the upper end of the slide block 21 is a cambered surface with a diameter smaller than that of the sealing ball 22, and the cambered surface is matched with the sealing ball 22. Specifically, the liquid passing port is closer to the liquid inlet than the transition section. The above structure ensures the circulation of the fluid mixture.

In the technical solution of this embodiment, the second end of the slider 21 is provided with a limiting portion to limit the moving position of the sealing ball 22. So that the upward movement position of the sealing ball 22 is controlled. Specifically, the limiting portion is a baffle plate having a through hole, and when the slider 21 is in the second position, the drain port 100 is higher than the baffle plate, that is, the length of the second slider segment is smaller than the distance from the step of the first valve body segment and the second valve body segment to the drain port 100. The structure has lower processing cost.

The application also provides a pump assembly, and the pump assembly includes pump main part and valve, and the valve setting is at the liquid outlet of pump main part. The valve is the valve. With the pump assembly of the present application, the fluid mixture or solids in the fluid mixture do not accumulate as much within the pump, so that the motor of the pump assembly is not easily damaged.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve, comprising:

the valve body (10), the valve body (10) is a tubular structure, the first end of the tubular structure is a liquid inlet, the second end of the tubular structure is a liquid outlet, and a drainage port (100) is arranged on the side wall of the valve body (10);

the valve core (20), the valve core (20) is movably arranged in the valve body (10), the valve core (20) has a first position for blocking the leakage port (100), and the valve core (20) has a second position for blocking the liquid inlet;

when the valve core (20) is located at the first position, the liquid inlet and the liquid outlet of the valve body (10) are communicated, and when the valve core (20) is located at the second position, the liquid outlet of the valve body (10) is communicated with the drainage port (100);

the valve core (20) comprises a slide block (21), the slide block (21) is provided with a liquid passing channel (200), when the valve core (20) is positioned at the first position, the outer wall of the slide block (21) blocks the drain port (100), and the liquid inlet is communicated with the liquid outlet through the liquid passing channel (200); the liquid passing channel (200) comprises a liquid passing port arranged on the side wall of the sliding block (21) and a hollow structure in the sliding block (21), and one end, close to the liquid inlet, of the sliding block (21) is provided with a blocking cover; the valve body (10) sequentially comprises a first valve body section, a second valve body section and a third valve body section from the liquid inlet to the liquid outlet, the inner diameter of the first valve body section and the inner diameter of the third valve body section are both smaller than the inner diameter of the second valve body section, the slider (21) sequentially comprises a first slider section and a second slider section from the liquid inlet to the liquid outlet, the outer diameter of the first slider section is matched with the inner diameter of the first valve body section, and the outer diameter of the second slider section is matched with the inner diameter of the second valve body section;

the sliding block (21) is cylindrical, the liquid passing port is communicated with a hollow structure in the sliding block (21), and the hollow structure is communicated with the liquid outlet through the upper part of the sliding block (21);

the valve body (10) comprises an upper valve body (11) and a lower valve body (12), and the upper valve body (11) is in threaded connection with the lower valve body (12); the first valve body section and the second valve body section are in stepped transition, the steps are arranged on the lower valve body (12), the second valve body section and the third valve body section are in stepped transition, and the steps are arranged on the upper valve body (11).

2. The valve of claim 1, wherein the fluid passage port is located in a sidewall of the first slider segment.

3. Valve according to claim 1, wherein sealing rings are arranged on both sides of the second slider section, and the bleed port (100) is located between the sealing rings on both sides of the second slider section when the slider (21) is in the first position.

4. The valve according to claim 1, wherein the spool (20) further comprises a sealing ball (22), the hollow structure of the slider (21) comprises a first hollow section, a second hollow section, and a transition section, the first hollow section is closer to the liquid inlet than the second hollow section, the transition section is connected between the first hollow section and the second hollow section, the sealing ball (22) has a diameter larger than an inner diameter of the first hollow section, and the sealing ball (22) has a diameter smaller than an inner diameter of the second hollow section.

5. The valve of claim 4, wherein the liquid-passing port is closer to the liquid inlet than the transition section.

6. Valve according to claim 4, wherein the other end of the slider (21) is provided with a stop to limit the displacement position of the sealing ball (22).

7. A pump assembly comprising a pump body and a valve arranged at a liquid outlet of the pump body, characterized in that the valve is a valve as claimed in any one of claims 1 to 6.