CN112178246A

CN112178246A - Lifting check valve for oil field oil transportation system

Info

Publication number: CN112178246A
Application number: CN202011020918.4A
Authority: CN
Inventors: 任林赟; 王树旺
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-01-05

Abstract

The invention relates to a lifting check valve for an oil field oil transportation system, which comprises a valve body and a valve cover arranged at the upper end of the middle part of the valve body, wherein an inlet flow passage A, a middle cavity and an outlet flow passage B are arranged in the valve body, a valve seat is arranged at the outlet end of the inlet flow passage A in the valve body, a fluid passage communicated with the inlet flow passage A is arranged on the valve seat, a valve clack matched with the valve seat is arranged in the valve body, and the lifting check valve also comprises a buffer mechanism used for slowing down the descending speed of the valve clack when a medium at the inlet side of the valve body is suddenly interrupted. The invention has the beneficial effects that: through the cooperation of the guide post on the buffer piston and the track groove and the stopping effect of the stopping block, when the valve clack is closed, the buffer spring can play a role in buffering the closing of the valve clack through the buffer piston, so that the impact of a sealing surface between the valve clack and the valve seat can be relieved, and the service life of the check valve is prolonged.

Description

Lifting check valve for oil field oil transportation system

Technical Field

The invention belongs to the technical field of check valves, and particularly relates to a lifting check valve for an oil field oil transportation system.

Background

At present, in oil field production, in order to ensure safe operation of crude oil output equipment and an oil transportation system, a check valve is required to be installed at an outlet end. As is known, most of check valves installed at the outlet end of an oil transportation device are lift check valves, which are valves that automatically open and close valve flaps depending on the flow of a medium, to prevent the backflow of the medium, and the conventional lift check valves mainly include: the valve body, the disk seat, the valve clack, uide bushing and valve gap, be equipped with the inlet flow way in the valve body, export flow way and lumen, be equipped with the disk seat at the inlet flow way exit end, the disk seat upper end is equipped with the disk seat sealed face, the valve gap is installed in valve body middle part upper end, uide bushing upper end fixed mounting is between valve body and valve gap, the uide bushing lower extreme stretches into the lumen, the valve clack sets up inside the uide bushing, the valve clack excircle forms upper and lower direction with the uide bushing inner wall, the valve clack lower extreme is equipped with can form with the disk seat sealed face and opens, the valve clack sealed face of closing the valve, the uide bushing upper end is equipped with: the valve clack is opening the in-process, and when valve import side medium was interrupted suddenly, the valve clack is closed downwards fast under the effect of valve outlet side medium, and the valve clack sealing surface forms a great impact force to the sealed face of valve seat for the sealed face of valve clack receives destruction easily with the sealed face of valve seat, influences life, and the noise is big simultaneously.

Disclosure of Invention

The present invention provides a lift check valve for oil field oil transportation system, which is characterized in that when the medium at the inlet side of the valve is suddenly interrupted, the valve flap is slowly closed downwards, so that the impact force of the sealing surface of the valve flap to the sealing surface of the valve seat is small, and the lift check valve has long service life and low noise.

The invention discloses a lifting check valve for an oil field oil transportation system, which comprises a valve body and a valve cover arranged at the upper end of the middle part of the valve body, wherein an inlet flow passage A, a middle cavity and an outlet flow passage B are arranged in the valve body, a valve seat is arranged at the outlet end of the inlet flow passage A in the valve body, a fluid passage communicated with the inlet flow passage A is arranged on the valve seat, a valve clack matched with the valve seat is arranged in the valve body, the lifting check valve also comprises a buffer mechanism used for slowing down the descending speed of the valve clack when a medium at the inlet side of the valve body is suddenly interrupted, and the buffer mechanism comprises: the straight groove is formed in the upper portion of the valve clack, a track groove is formed in the side wall of the straight groove, and the track groove comprises a horizontal groove, a vertical groove and an inclined groove which are sequentially communicated end to end; the valve cover is provided with a valve seat, the valve seat is provided with a valve cover, a valve rod is arranged in the valve seat, the valve cover is provided with a valve rod hole, the valve rod hole is provided with a valve rod hole, the valve rod hole is provided; the stopping cavity is arranged on the side wall of the straight groove and communicated with the vertical groove, the stopping cavity is connected with a stopping block in a sliding mode, and the stopping block is fixedly connected with the bottom surface of the stopping cavity and is pushed into a stopping spring of the vertical groove.

In one embodiment, the stop cavity is obliquely arranged and the oblique direction of the stop cavity is the same as the oblique direction of the oblique groove.

In one embodiment, a guide surface is formed at one end of the stop block, which is far away from the stop spring, and when the guide column moves downwards along the vertical groove, the guide column can be pressed against the guide surface and push the stop block to move downwards along the stop cavity.

The technical scheme has the advantages that:

the valve flap is provided with the track groove, the valve cover is provided with the buffer piston and the buffer spring, the valve flap is provided with the stop block and the stop spring, the valve flap can be opened without the acting force of the buffer spring through the matching of the guide column on the buffer piston and the track groove and the stop action of the stop block, and the buffer spring has the buffer action on the closing of the valve flap through the buffer piston when the valve flap is closed, so that the impact of a sealing surface between the valve flap and the valve seat can be relieved, and the service life of the check valve is prolonged.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the invention with the valve flap in a closed position;

FIG. 2 is a block diagram of the valve flap of the present invention in an open position;

FIG. 3 is a view of the valve flap of the present invention moving downwardly closed;

fig. 4 is a schematic three-dimensional structure of the valve flap of the present invention.

In the figure, a valve body 1, a valve clack 2, a straight groove 21, a vertical groove 211, an oblique groove 212, a horizontal groove 213, a stop cavity 214, a valve cover 3, a buffer cavity 31, a through hole 311, a sliding groove 32, a buffer piston 4, a guide post 41, a buffer spring 5, a stop block 6, a guide surface 61, a stop spring 7, a valve seat 8, a fluid channel 81, a middle cavity 9 and an annular through groove 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

The invention discloses a lifting check valve for an oil field oil transportation system, which comprises a valve body 1 and a valve cover 3 arranged at the upper end of the middle part of the valve body 1, wherein an inlet flow passage A, a middle cavity 9 and an outlet flow passage B are arranged in the valve body 1, a valve seat 8 is arranged at the outlet end of the inlet flow passage A in the valve body 1, a fluid passage 81 communicated with the inlet flow passage A is arranged on the valve seat 8, a valve clack 2 matched with the valve seat 8 is arranged in the valve body 1, the lifting check valve further comprises a buffer mechanism for slowing down the descending speed of the valve clack 2 when a medium at the inlet side of the valve body 1 is suddenly interrupted, and the buffer mechanism comprises: the straight groove 21 is arranged at the upper part of the valve clack 2, the side wall of the straight groove 21 is provided with a track groove, and the track groove comprises a horizontal groove 213, a vertical groove 211 and an oblique groove 212 which are sequentially communicated end to end; the buffer cavity 31 is arranged on the valve cover 3, a buffer piston 4 is connected in the buffer cavity 31 in a sliding manner, a buffer spring 5 is fixedly connected between the bottom surface of the buffer cavity 31 and the buffer piston 4, one end, far away from the buffer spring 5, of the buffer piston 4 is fixedly connected with a guide post 41, the guide post 41 is embedded in the track groove and is in sliding connection with the track groove, and when the guide post 41 moves along the inclined groove 212 from bottom to top, the buffer piston 4 can compress the buffer spring 5; backstop chamber 214, set up in the lateral wall of vertical groove 21 and with vertical groove 212 intercommunication, backstop chamber 214 sliding connection has backstop 6, fixedly connected with is used for with between the bottom surface of backstop 6 and backstop chamber 214 backstop 6 pushes into the backstop spring 7 of vertical groove 212.

It is worth mentioning that as shown in fig. 1 and 3, a sliding groove 32 is formed in an end surface of the valve cover 3 facing the middle cavity 9, the upper portion of the valve flap 2 is slidably connected in the sliding groove 32, and the buffer cavity 31 is formed in a side wall of the sliding groove 32.

It is worth mentioning that as shown in fig. 1 and 3, an annular through groove 10 is formed between the outer edge of the valve cover 3 extending into the middle cavity 9 and the inner wall of the middle cavity 9, and a through hole 311 is formed between the buffer cavity 31 and the annular through groove 10.

Preferably, as shown in fig. 1 and 2, the stopping cavity 214 is disposed obliquely and the oblique direction thereof is the same as the oblique direction of the oblique groove 212.

Preferably, as shown in fig. 1, 2 and 3, a guide surface 61 is formed at an end of the stop block 6 away from the stop spring 7, and when the guide post 41 moves downward along the vertical slot 211, the guide post 41 can press against the guide surface 61 and push the stop block 6 to move downward along the stop cavity 214.

The working mode of the invention is as follows:

when fluid flows in from the inlet channel A, the valve clack 2 moves upwards, and the guide column 41 is located in the vertical track groove 211, and the buffer spring 5 does not generate resistance on the valve clack 2 in the process of moving upwards of the valve clack 2, so that the valve clack 2 can be quickly opened, and when the valve clack 2 is completely opened, as shown in FIG. 2, after the guide column 41 pushes the stop block 6 to move downwards, when the guide column 41 moves to the lower part of the stop block 6, namely the valve clack 2 moves upwards to the highest position, the stop block 6 will prevent the guide column 41 from moving upwards along the vertical track groove 211 under the acting force of the stop spring 7.

When the fluid in the inlet flow passage a is suddenly interrupted, the valve clack 2 drives the valve clack 2 to move downwards under the self gravity, the medium pressure in the outlet flow passage B and the impact force generated by backflow, and due to the stopping action of the stopping block 6, the guide column 41 moves along the inclined groove 212, so that the buffer piston 4 moves leftwards to compress the buffer spring 5, as shown in fig. 3, the valve clack 2 reduces the closing speed under the acting force of the buffer spring 5, and the impact on the valve seat is reduced; when the valve flap 2 is completely closed, as shown in fig. 1, the guide post 41 is located in the horizontal groove 213, and the guide post 41 moves to the rightmost end of the horizontal groove 213, i.e., the uppermost end position of the vertical groove 211, under the urging force of the damper spring 5.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a lift check valve for oil field oil transportation system, include the valve body with set up in the valve gap of valve body middle part upper end, be provided with inlet flow channel A, lumen and outlet flow channel B in the valve body, be located in the valve body inlet flow channel A's exit end is provided with the disk seat, set up on the disk seat with the fluid passage of inlet flow channel A intercommunication each other, be provided with in the valve body with the valve clack that the disk seat was mutually supported, a serial communication port, lift check valve still include buffer gear, be used for slow down when the inlet side medium of valve body breaks suddenly the falling velocity of valve clack, buffer gear includes:

the straight groove is formed in the upper portion of the valve clack, a track groove is formed in the side wall of the straight groove, and the track groove comprises a horizontal groove, a vertical groove and an inclined groove which are sequentially communicated end to end;

the valve cover is provided with a valve seat, the valve seat is provided with a valve cover, a valve rod is arranged in the valve seat, the valve cover is provided with a valve rod hole, the valve rod hole is provided with a valve rod hole, the valve rod hole is provided;

the stopping cavity is arranged on the side wall of the straight groove and communicated with the vertical groove, the stopping cavity is connected with a stopping block in a sliding mode, and the stopping block is fixedly connected with the bottom surface of the stopping cavity and is pushed into a stopping spring of the vertical groove.

2. The poppet check valve for an oilfield oil delivery system of claim 1, wherein the check chamber is disposed at an angle and has an angle in the same direction as the angled groove.

3. The poppet check valve for use in oilfield oil delivery system of claim 1, wherein an end of the stop block distal from the stop spring is formed with a guide surface against which the guide post can press and push the stop block downward along the stop cavity when the guide post moves downward along the vertical groove.