CN107191627B

CN107191627B - Multi-way valve

Info

Publication number: CN107191627B
Application number: CN201710592574.6A
Authority: CN
Inventors: 高智; 姚建设; 万明敏; 李学富; 陈云昭
Original assignee: Wuhu King Bull Infortec Petroleum Equipment Co ltd; Kelamayi King Bull Infortec Petroleum Equipment Co ltd
Current assignee: Wuhu King Bull Infortec Petroleum Equipment Co ltd; Kelamayi King Bull Infortec Petroleum Equipment Co ltd
Priority date: 2017-07-19
Filing date: 2017-07-19
Publication date: 2023-09-08
Anticipated expiration: 2037-07-19
Also published as: CN107191627A

Abstract

The invention discloses a multi-way valve, which comprises a right valve body, a middle valve body, a left valve body and a rotary valve core; the left valve body and the right valve body are respectively assembled on the left side and the right side of the middle valve body, a cavity is formed by the left valve body, the right valve body and the right valve body, the rotary valve core is arranged in the cavity, the right end of the rotary valve core extends out of the right valve body, and the left end of the rotary valve core is assembled on the left valve body; the rotary valve core is provided with a first channel and a second channel which are communicated with each other; the left valve body is provided with a metering port and a plurality of left liquid inlet communicated with the cavity, and the metering port is communicated with the first channel; the right valve body is provided with a plurality of right liquid inlets communicated with the cavity, and the second channel can be gated with any one of the left liquid inlets and the right liquid inlets; the middle valve body or the left valve body is provided with a collection and transmission port communicated with the cavity. The multi-way valve realizes interlayer space layout, and the number of connected single wells is double that of the single wells of the existing single-layer multi-way valve.

Description

Multi-way valve

Technical Field

The invention relates to a multi-way valve, belonging to the field of oil and gas gathering and transportation systems in petroleum, chemical industry and the like.

Background

The multi-way valve is an important component in crude oil exploitation equipment, and is provided with a plurality of oil ports (or called liquid inlets), and the oil ports are connected with pipelines (including metering pipelines, liquid inlet pipelines and gathering pipelines) for conveying oil. Chinese patent application No. ZL201520080459.7 provides a multi-way valve, and the upper valve body of the multi-way valve is provided with a plurality of oil ports along its circumference, and corresponding metering lines and liquid supply lines need to be arranged along the circumference of the upper valve body so as to be connected with the oil ports. However, the circumferential arrangement of the metering pipelines and more liquid supply pipelines makes the planar space occupation of the multi-way valve larger, and the pipeline arrangement is complicated; but also increases the bearing space of the valve body cavity, which means that the wall thickness of the valve body is increased and the total weight of the valve body is increased, which are all disadvantageous factors. The cylindrical sealing multi-way valve disclosed in U.S. patent publication No. US5927330 realizes connecting a plurality of single well liquid inlet pipelines and interlayer layout. However, the cylindrical surface sealing pair multi-way valve has the defects of soft sealing, weak sand and scale resistance, extremely easy failure, internal leakage and inaccurate metering. The planar hard sealing multi-way valve overcomes the defect of the cylindrical multi-way valve, and if the planar hard sealing multi-way valve can realize the connection of more single-well liquid-incoming pipelines and share one set of metering equipment, the investment cost of oil extraction equipment which is spread to each single well is greatly reduced, and the planar hard sealing multi-way valve has significance in the current age of low oil price.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a multi-way valve capable of realizing interlayer space layout, the number of single wells which can be connected is multiplied, and the occupation of plane space can be saved.

In order to solve the technical problems, the invention adopts the following technical scheme:

the multi-way valve comprises a right valve body, a middle valve body, a left valve body and a rotary valve core;

the left valve body and the right valve body are respectively assembled on the left side and the right side of the middle valve body and form a cavity in a surrounding mode, the rotary valve core is arranged in the cavity, the right end of the rotary valve core extends out of the right valve body, and the left end of the rotary valve core is assembled on the left valve body;

the rotary valve core is provided with a first channel and a second channel which are communicated with each other;

the left valve body is provided with a metering port and a plurality of left liquid inlet communicated with the cavity, and the metering port is communicated with the first channel;

the right valve body is provided with a plurality of right liquid inlets communicated with the cavity, and the second channel can be gated with any one of the left liquid inlets and the right liquid inlets;

and the middle valve body or the left valve body is provided with a collection and transmission port communicated with the cavity.

Preferably, a left mounting hole is formed in the left valve body, and a right mounting hole coaxial with the left mounting hole is formed in the right valve body;

the rotary valve core comprises a valve core body and a protruding part, the right end of the valve core body penetrates through and extends out of the right mounting hole, and the left end of the valve core body extends into the left mounting hole;

the first channel is arranged in the valve core body and penetrates through the left end of the valve core body;

the second channel is arranged in the protruding part, the left port of the second channel is opposite to the left valve body and used for switching gating in a plurality of left liquid inlets when the rotary valve core rotates, and the right port of the second channel is opposite to the right valve body and used for switching gating in a plurality of right liquid inlets when the rotary valve core rotates.

Preferably, the left liquid inlet is formed on the end face of the left valve body facing the right valve body, and is enclosed into a circle; the right liquid inlet is formed in the end face, facing the left valve body, of the right valve body, and is round, and the left liquid inlet and the right liquid inlet are arranged in one-to-one correspondence;

the left port and the right port of the second channel are arranged in a staggered manner in the arrangement direction of the left liquid inlet;

when the left port of the second channel is gated with one of the left liquid inlets, the right port of the second channel is not conducted with the plurality of right liquid inlets; when the right port of the second channel is gated with one of the right liquid inlets, the left port of the second channel is not conducted with the left liquid inlets.

Preferably, the left liquid inlet is formed on the end face of the left valve body facing the right valve body, and is enclosed into a circle; the right liquid inlet is formed in the end face of the right valve body, facing the left valve body, and is round; the left liquid inlet and the right liquid inlet are arranged in a staggered manner;

the connecting line of the left port and the right port of the second channel is parallel to the rotation center line of the rotary valve core;

Preferably, a valve seat ring is respectively arranged at a left port and a right port of the second channel, annular first step surfaces are respectively formed on the inner walls of the second channels at the inner sides of the two valve seat rings, an inner hexagonal nut is arranged between the valve seat ring and the first step surfaces, a spring which deforms under the action of the inner hexagonal nut to generate axial force is arranged on the inner hexagonal nut, and a thrust ring which pushes the valve seat ring is arranged between the spring and the valve seat ring under the action of the spring.

Preferably, a plug is arranged on the left valve body at a position corresponding to one of the left liquid inlets; and a plug is arranged on the right valve body at a position corresponding to one of the right liquid inlets.

Preferably, a second step surface facing the right valve body is formed on the valve core body, a right shaft sleeve is arranged in the right mounting hole in an interference fit mode, the right shaft sleeve is sleeved on the valve core body, and when the rotary valve core moves axially, the right shaft sleeve can be abutted to the second step surface.

Preferably, a third step surface facing the left valve body is formed on the valve core body, a left shaft sleeve is arranged in the left mounting hole in a clearance fit mode, the left shaft sleeve is sleeved on the rotary valve core, the right end of the left shaft sleeve abuts against the third step surface, and the left end of the left shaft sleeve protrudes out of the right end of the valve core body;

the left mounting hole is internally provided with an adjusting nut which is positioned at the left side of the valve core body and propped against the left end of the left shaft sleeve, the adjusting nut is in threaded connection with the hole wall of the left mounting hole, and the valve core body moves left and right by adjusting the adjusting nut.

Preferably, an annular gap is formed between the hole wall of the section of the right mounting hole, which is close to the outer side, and the valve core body, sealing filler is filled in the annular gap, a gland is sleeved on the valve core body, the gland is propped against the sealing filler, and the gland is pre-tightened through a fastener.

Preferably, the collecting and conveying port is arranged on the left valve body and is annular, and the metering port is positioned in the collecting and conveying port;

the multi-way valve further comprises an assembler, the assembler comprises an assembler body and a metering channel, the assembler body is fixed on the left valve body, a cavity penetrating to two ends of the assembler body is formed in the assembler body, a first port of the cavity is in butt joint with the gathering and conveying port, and a second port of the cavity is used for being connected with a gathering and conveying pipeline; the metering channel is positioned in the collector body, one end of the metering channel protrudes out of the first port and is in butt joint with the metering port, and the other end of the metering channel protrudes out of the outer wall of the containing cavity and is used for being connected with a metering pipeline.

Compared with the prior art, the multi-way valve has the beneficial effects that:

1. the multi-way valve provided by the invention has the advantages that the structure of the relative layout of the left valve body and the right valve body is provided, so that the multi-way valve is changed into two space planes from an original single plane, the interlayer space layout is realized, and the number of connected single wells is doubled compared with that of the single wells of the existing single-layer multi-way valve.

2. The multi-way valve realizes multi-way arrangement of the multi-way valve, and further realizes that more single wells share one meter, so that the cost of oil extraction equipment spreading to each single well is further reduced, and the oil field investment is saved. For the thick oil development oil field, the oil field with dense well spacing and the places with larger land-feature cost, the multi-way valve can save space occupation and further reduce investment.

3. The multi-way valve of the invention inherits the advantages of the plane hard sealing pair multi-way valve, and has the advantages of sealing, flushing resistance, abrasion resistance and long service life.

Drawings

Fig. 1 is a front cross-sectional view of a multiway valve according to an embodiment of the invention, wherein one of the right inlet ports is open.

Fig. 2 is a front cross-sectional view of a multiway valve according to an embodiment of the invention, wherein one left inlet is open.

Fig. 3 is an enlarged view of a portion a in fig. 1.

Fig. 4 is an enlarged view of a portion B in fig. 1.

Fig. 5 is an enlarged view of a portion C in fig. 1.

Fig. 6 is a front view of one configuration of the rotary spool of the multiway valve of the present invention.

Fig. 7 is a side view of another construction of a rotary spool of a multiway valve of the present invention.

Fig. 8 is a front cross-sectional view of a multiway valve according to another embodiment of the invention.

In the figure:

1-right valve body; 2-an intermediate valve body; 3-left valve body; 4-rotating the valve core; 41-a valve core body; 42-a projection; 43-first channel; 44-a second channel; 45-third channel; 5-chamber; 6, a sealing ring; 7-a sealing gasket; 8-right shaft sleeve; 9-sealing filler; 10-capping; 11-a dust ring; 12-an inner hexagonal nut; 13-connecting bolts; 14-left liquid channel; 15-left liquid inlet; 16-right liquid inlet; 17-a metering port; 18-collecting and conveying ports; 19-a flange plate; 20-plugging; 21-a set screw; 22-left shaft sleeve; 23-adjusting the nut; 24-locating pins; 25-valve seat ring; 26-thrust ring; 27-a spring; 28-a first section; 29-a second section; 30-collector body; 31-a metering channel; 32-a cavity.

Detailed Description

The present invention will be described in detail below with reference to the drawings and detailed description to enable those skilled in the art to better understand the technical scheme of the present invention.

As shown in fig. 1 and 2, the multiway valve disclosed in the embodiment of the invention comprises a right valve body 1, a middle valve body 2, a left valve body 3 and a rotary valve core 4. The left valve body 3 and the right valve body 1 are respectively assembled on the left side and the right side of the middle valve body 2, and the left valve body 3 and the middle valve body are enclosed into a cavity 5, the left valve body 3 is connected with the middle valve body through a connecting bolt 13, the right valve body 1 is also connected with the middle valve body 2 through the connecting bolt 13, and the left valve body 3, the right valve body 1 and the middle valve body 2 are sealed through a sealing structure or a sealing piece, and in the embodiment, the sealing is performed in a mode of matching a sealing ring 6 and a sealing gasket 7. The rotary valve core 4 is arranged in the chamber 5, the right end of the rotary valve core extends out of the right valve body 1, and the left end of the rotary valve core is assembled on the left valve body 3. The rotary valve core 4 is provided with a first channel 43 and a second channel 44 which are communicated with each other; the left valve body 3 is provided with a metering port 17 and a plurality of left liquid inlet 15 communicated with the cavity 5, and the first channel 43 is communicated with the metering port 17; the right valve body 1 is provided with a plurality of right liquid inlets 16 communicated with the chamber 5, and the second channel 44 can be gated with any one of the plurality of left liquid inlets 15 and the plurality of right liquid inlets 16. The collecting and conveying port 18 is arranged on the middle valve body 2 or the left valve body 3, the collecting and conveying port 18 is communicated with the cavity 5, and the collecting and conveying port 18 is used for collecting incoming liquid from a plurality of single wells into the cavity 5 of the multi-way valve from the liquid inlets and uniformly conveying the incoming liquid outwards. According to the invention, the left valve body 3 and the right valve body 1 with a plurality of liquid inlets are respectively arranged on two sides of the middle valve body 2, so that the metering pipeline and the liquid inlet pipeline can be arranged in two planes in space, and the occupation of plane space is saved.

The position of the left valve body 3 corresponding to the metering port 17 in the embodiment is provided with a flange 19, the flange 19 is fixed through a connecting bolt 13, and a metering pipeline is welded on the flange 19, so that the oil liquid of a single well enters the metering pipeline through the metering port 17.

With continued reference to fig. 1, 2, and with reference to fig. 6 and 7, the rotary spool 4 in the present embodiment includes a spool body 41 and a projection 42; the rotary valve core 4 is arranged in the cavity 5 by connecting two ends of the valve core body 41 with the left valve body 3 and the right valve body 1 respectively, the right end of the valve core body 41 extends out of the right valve body 1, the left end of the valve core body is assembled on the left valve body 3, and the first channel 43 is arranged in the valve core body 41 and penetrates to the left end of the valve core body 41 but does not penetrate to the right end of the valve core body 41; the second channel 44 is formed in the protruding portion 42, the protruding portion 42 is integrally located in the chamber 5, and when the valve core body 41 is driven by the external power mechanism to rotate, the protruding portion 42 is driven by the valve core body 41 to rotate around the valve core body 41. The valve core body 41 and the protruding part 42 in this embodiment are both columnar, and both are transversely arranged, the valve core body 41 and the protruding part 42 are connected through a connecting part, a third channel 45 for communicating the first channel 43 and the second channel 44 is arranged in the connecting part, the left port of the second channel 44 faces the left valve body 3 and is used for gating with any one of the left liquid inlet 15, and the right port of the second channel 44 faces the right valve body 1 and is used for gating with any one of the right liquid inlet 16. By rotating the valve core 4 body, the protruding part 42 is driven to rotate, so that the left port of the second channel 44 is communicated with one of the left liquid inlet 15 or the right port of the second channel 44 is communicated with one of the right liquid inlet 16, and oil entering from the communicated liquid inlet sequentially enters the metering port 17 through the second channel 44, the third channel 45 and the first channel 43 for metering. That is, when a certain left inlet 15 of the left valve body 3 is opposite to and communicates with the left port of the second passage 44, the right valve body 1 is opposite to the right port of the second passage 44, a blind port (instead of the right inlet 16), and when a certain right inlet 16 of the right valve body 1 is opposite to and communicates with the right port of the second passage 44, the left valve body 3 is opposite to the left port of the second passage 44, a blind port (instead of the left inlet 15).

As shown in fig. 1 and 2, the left valve body 3 and the right valve body 1 shown in this embodiment are similar to discs, and a plurality of left liquid inlets 15 are all formed on the end surface of the left valve body 3 facing the right valve body 1 and are enclosed to be circular, and the left liquid inlets 15 in this embodiment are uniformly distributed on the end surface of the left valve body 3, that is, the distances between two adjacent left liquid inlets 15 are equal. The left valve body 3 is provided with left liquid inlet channels 14 which are in one-to-one correspondence and are communicated with the left liquid inlet openings 15, and the left liquid inlet channels 14 extend out of the periphery of the left valve body 3 and are connected with a flange 19 so as to facilitate connection of liquid inlet pipelines. Similarly, the right liquid inlets 16 are all formed on the end face of the right valve body 1 facing the left valve body 3, and are round. The right liquid inlets 16 in this embodiment are uniformly distributed on the end face of the right valve body 1, that is, the distances between two adjacent right liquid inlets 16 are equal. The left liquid inlet 15 and the right liquid inlet signature 16 are arranged in a one-to-one correspondence. The middle valve body 2 is provided with a large-channel gathering and conveying port 18, and the gathering and conveying port 18 forms a flange shape so as to be connected with a gathering and conveying pipeline for conveying oil. Because the left liquid inlet 15 and the right liquid inlet 16 are arranged in one-to-one correspondence, if the second channel 44 is designed to be in a straight line shape, two ends of the second channel 44 are respectively communicated with one left liquid inlet 15 and one right liquid inlet 16 at the same time, so that in order to avoid the situation, the second channel 44 can only be gated with one liquid inlet, as shown in fig. 6, in this embodiment, the left port and the right port of the second channel 44 are arranged in a staggered manner in the arrangement direction of the left liquid inlet 15 (or the right liquid inlet 16), that is, the protruding part 42 comprises a first section 28 and a second section 29 which are parallel and staggered at a certain position, and the two sections are in transitional connection through a bending part, that is, the left port and the right port of the second channel 44 are staggered in the radial direction of the second channel 44; when the left port of the second channel 44 is gated with one of the left liquid inlets 15, the right port is dislocated from the left port, and the right port will correspond to the blind port of the right valve body 1, i.e. the right port of the second channel 44 is not conducted with the plurality of right liquid inlets 16; similarly, when the right port of the second channel 44 is gated to one of the right incoming ports 16, the left port of the second channel 44 is not in communication with the plurality of left incoming ports 15.

In this embodiment, a multiway valve with twenty-eight channels (i.e., twenty-eight liquid inlets) is taken as an example, fourteen left liquid inlets 15 are uniformly distributed on the left valve body 3, fourteen right liquid inlets 16 are uniformly distributed on the right valve body 1, and the left valve body and the right valve body are staggered by 360 degrees/28 degrees, so that twenty-eight equally-divided positions are just formed on the circumference. As shown in fig. 1, the second passages 44 of the rotary spool 4 are symmetrical at the same angle. With continued reference to fig. 1, when the right valve body 1 is gated, the gated oil well is conducted to the right port, and the oil enters the second channel 44 of the rotary valve core 4 along the arrow direction in the figure, then flows into the first channel 43, finally flows out from the metering port 17, and enters the metering device to perform flow single well measurement. The oil from twenty-seven liquid inlets on the right liquid inlet 16 and the left valve body 3 which are not selected on the other right valve body 1 enters the cavity 5, flows out from the collecting and conveying port 18, and the other steps are similar. As shown in fig. 2, when the left valve body 3 is gated, the oil of the gated oil well enters the second channel 44 of the rotary valve core 4 along the arrow direction in the figure, then flows into the first channel 43, finally flows out from the metering port 17 and enters the metering device to perform single-well flow measurement. The left liquid inlet 15 on the left valve body 3 which is not selected and the oil from twenty-seven liquid inlets on the right valve body 1 enter the cavity 5 and flow out from the collecting and conveying port 18, and the other steps are similar.

As another solution of the present embodiment, the left port and the right port of the second channel 44 may be arranged in a non-staggered manner, that is, as shown in fig. 7, the protruding portion 42 in the present embodiment is symmetrically arranged about the connecting portion, the second channel 44 is in a linear shape, and the left port and the right port are arranged opposite to each other, if the second channel 44 is in a non-linear shape, the connection line between the left port and the right port may be parallel to the rotation center line of the rotary valve core 4; the left liquid inlet 15 and the right liquid inlet 16 are arranged in a staggered manner, so that the effect that the second channel 44 can only be gated with one of the liquid inlet is also realized, namely, when the left port of the second channel 44 is gated with one of the left liquid inlet 15, the right port of the second channel 44 is not conducted with the right liquid inlet 16; when the right port of the second channel 44 is gated to one of the right incoming ports 16, the left port of the second channel 44 is not conductive to the plurality of left incoming ports 15. In this embodiment, taking a multiway valve with twenty-eight channels (i.e., twenty-eight liquid inlets) as an example, with continued reference to fig. 1 and fig. 6, the right valve body 1 and the left valve body 3 are disposed at the same angle, i.e., when two valve bodies overlap, twenty-eight liquid inlets are distributed at fourteen positions, and the angle between two adjacent liquid inlets is 360 degrees/14. The two ends of the second channel 44 of the rotary spool 4 are staggered by an angle of 360 degrees/28.

With continued reference to fig. 1 and 2 and reference to fig. 3, the left port and the right port of the second channel 44 in this embodiment are respectively provided with a valve seat ring 25, and the arrangement of the valve seat ring 25 can ensure the sealing of the abutting joint of the second channel 44 and the liquid inlet, so that the abutting joint of the port of the second channel 44 and the liquid inlet is tight, and oil leakage is prevented, and in order to realize sealing, the following structure is adopted: annular first step surfaces are formed on the inner walls of the second channels 44 on the inner sides of the two valve seat rings 25 respectively, an inner hexagonal nut 12 is arranged between the valve seat rings 25 and the first step surfaces, external threads are formed on the outer peripheries of the valve seat rings 25 and the first step surfaces, the inner hexagonal nut 12 comprises two cylindrical parts with unequal outer diameters, one end with larger outer diameters is propped against the first step surfaces, the other end with smaller outer diameters faces the valve seat rings 25, springs 27 which deform under the action of the inner hexagonal nut 12 to generate axial force are sleeved on the cylindrical parts with smaller outer diameters, thrust rings 26 which are arranged between the springs 27 and the valve seat rings 25 and push the valve seat rings 25 under the action of the springs 27 can be selected from waveforms or disc-shaped springs 27, and the arrangement of the thrust rings 26 and the springs 27 enables the valve seat rings 25 to keep close fit with liquid inlets all the time, so that combination sealing is realized. Meanwhile, a sealing ring 6 is arranged between the valve seat ring 25 and the second channel 44, and is used for sealing the valve seat ring 25 and the second channel 44. In order to always orient the valve seat ring 25 in the direction of the rotation axis of the valve body 41 during movement, the valve seat ring 25 is positioned by the positioning pin 24.

With continued reference to fig. 1 and 2, the left valve body 3 is provided with a left mounting hole, the right valve body 1 is provided with a right mounting hole coaxial with the left mounting hole, the shaft head at the right end of the valve core body 41 penetrates through and extends out of the right mounting hole, and the left end of the shaft head extends into a section of the left mounting hole. As shown in fig. 5, the rotary valve body 4 is formed with an annular second stepped surface facing the right valve body 1, and the valve body 41 corresponds to a stepped shaft having a shoulder, and the second stepped surface corresponds to the shoulder of the stepped shaft. The right shaft sleeve 8 is arranged in the right mounting hole in an interference fit mode, and the right shaft sleeve 8 is sleeved on the rotary valve core 4 and abuts against the second step surface. As shown in fig. 4, the valve core body 41 is further formed with an annular third step surface facing the left valve body 3, the left mounting hole is provided with a left shaft sleeve 22 in a clearance fit manner, and the left shaft sleeve 22 is sleeved on the rotary valve core 4, so that the left valve body 3 can move left and right, and the left shaft abuts against the third step surface. The left mounting hole which is not extended by the valve core body 41 is provided with the adjusting nut 23, that is, the adjusting nut 23 is positioned at the left side of the valve core body 41, the adjusting nut 23 is in threaded connection with the hole wall of the left mounting hole, so when a special tool is used for adjusting the adjusting nut 23 by extending from the metering port 17, when the adjusting nut 23 rotates, the left shaft sleeve 22 can be moved left and right, thereby driving the valve core body 41 to move left and right so as to adjust the axial gap between the second step surface and the right valve body 1, finally, the inter-shaft movable gap of the rotary valve core 4 is controlled within a certain range, for example, 0.4mm-0.5mm, and therefore, when the multi-way valve works at high temperature and high pressure, the rotary valve core 4 still has enough axial play for flexible rotation after thermal expansion. After the left sleeve 22 is adjusted to a desired position by the adjusting nut 23, the left sleeve 22 is screwed with the left valve body 3 by the set screw 21. In order to achieve sealing, sealing rings 6 are provided between the left sleeve 22 and the left valve body 3, and between the left sleeve 22 and the valve body 41.

From the above, it is known that the axial clearance between the second land surface and the right valve body 1 is actually the axial play of the rotary valve element 4, that is, the axial play of the rotary valve element 4 is equal to the axial clearance with the right valve body 1. The adjusting nut 23 is rotated to compensate different elongations of the rotary valve core 4 due to different temperatures, so that the rotary valve core 4 at different temperatures has reasonable axial play, and the rotary valve core 4 can flexibly rotate at different temperatures.

As shown in fig. 1 and 2, a plug 20 is provided on the left valve body 3 at a position corresponding to one of the plurality of left liquid inlets 15, and when the plug 20 is opened during debugging, the positions of the left liquid inlet 15 and the rotary valve core 4, that is, the positions of the left ports of the second channel 44 can be observed and aligned. The inner hexagonal nut 12 is regulated by a special tool, the force applied to the spring 27 is regulated, the spring 27 is deformed, the axial force is generated and transmitted to the thrust ring 26, the thrust ring 26 acts on the valve seat ring 25 again, and the valve seat ring 25 and the matching contact surface of the left valve body 3 have the required contact specific pressure, so that the purpose of isolating the sealed cavity 5 is achieved. Similarly, the right valve body 1 is provided with a plug 20 corresponding to one of the plurality of right liquid inlets 16, and the plug 20 has the same function as the plug 20 on the left valve body 3, and will not be described herein.

In order to prevent oil in the multiway valve from leaking from the gap between the right valve body 1 and the rotary valve core 4, a seal needs to be formed between the right valve body 1 and the rotary valve core 4 (the valve core body 41), specifically, as shown in fig. 5, a counter bore is formed at the upper end of the right mounting hole, an annular gap is formed between the wall of the counter bore and the valve core body 41 (that is, an annular gap is formed between the wall of a section of the right mounting hole, which is close to the outer side, and the valve core body 41), sealing filler 9 (the sealing filler 9 may be made of graphite) is filled in the annular gap, in this embodiment, a filler ring is used, then a gland 10 sleeved on the valve core body 41 is pressed against the sealing filler 9, and a fastening piece is used to keep the gland 10 to maintain a certain pressure on the sealing filler 9 all the time, in this embodiment, the fastening piece is a bolt screwed on the outer end face of the right valve body 1 and a nut sleeved on the bolt, and the pressure of the sealing filler 9 is regulated by rotating the nut, so that the sealing filler 9 can achieve good sealing under different temperatures and conditions. In addition, a dust-proof ring 11 is provided between the gland 10 and the valve body 41 to prevent dust, powder, etc. from entering, affecting the flexibility of the valve body rotation.

The multiway valve described above is the case when arranged vertically. As shown in fig. 8, when the multi-way valve is horizontally placed, the collection and delivery port 18 is arranged on the left valve body 3 and is annular, and the metering port 17 is positioned in the collection and delivery port 18; the multiway valve also comprises an assembler, wherein the assembler comprises an assembler body 30 and a metering channel 31, the assembler body 30 is fixed on the left valve body 3 through a connecting bolt 13, a containing cavity 32 penetrating to two ends of the assembler body 30 is formed in the assembler body 30, a first port of the containing cavity 32 is in butt joint with the collecting and conveying port 18 and is provided with a sealing ring 6 for sealing, a second port of the containing cavity is used for being connected with a collecting and conveying pipeline, and a flange plate is arranged at the second port of the containing cavity 32 for being connected with the collecting and conveying pipeline conveniently; the metering channel 31 is located in the collector body 30, one end of the metering channel protrudes from the first port and is in butt joint with the metering port 17, the other end of the metering channel protrudes from the outer wall of the container 32 to form a container 32 for being connected with a metering pipeline, and a flange is arranged at one end of the metering channel 31 protruding from the container 32 so as to be connected with the metering pipeline. As shown in fig. 8, a section of the metering channel 31 in this embodiment extending out of the collector body 30 extends in a direction perpendicular to the spool body 41, so that oil from the metering orifice 17 enters the metering channel 31, then flows out from the side end, and then enters the metering device for single-well flow measurement. The oil in the chamber 5 enters the containing cavity 32 through the annular collecting and conveying port 18 and then flows out from the bottom end into the collecting and conveying pipeline.

The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and are intended to be within the spirit and scope of the invention.

Claims

1. The multi-way valve is characterized by comprising a right valve body, a middle valve body, a left valve body and a rotary valve core;

the rotary valve core comprises a valve core body and a protruding part, wherein the first channel is arranged in the valve core body and penetrates through the left end of the valve core body but does not penetrate through the right end of the valve core body, the second channel is arranged in the protruding part, the protruding part is integrally positioned in the cavity, the valve core body and the protruding part are connected through a connecting part, and a third channel used for communicating the first channel with the second channel is arranged in the connecting part;

the right valve body is provided with a plurality of right liquid inlets communicated with the cavity, and the second channel can only be gated with any one of the left liquid inlets and the right liquid inlets;

2. The multiway valve of claim 1, wherein the left valve body is provided with a left mounting hole, and the right valve body is provided with a right mounting hole coaxial with the left mounting hole;

the right end of the valve core body penetrates through and extends out of the right mounting hole, and the left end of the valve core body extends into the left mounting hole;

the left port of the second channel is opposite to the left valve body and used for switching gating among a plurality of left liquid inlets when the rotary valve core rotates, and the right port of the second channel is opposite to the right valve body and used for switching gating among a plurality of right liquid inlets when the rotary valve core rotates.

3. The multiway valve of claim 2, wherein a plurality of the left liquid inlets are all formed on the end face of the left valve body facing the right valve body and are round; the right liquid inlet is formed in the end face, facing the left valve body, of the right valve body, and is round, and the left liquid inlet and the right liquid inlet are arranged in one-to-one correspondence;

4. The multiway valve of claim 2, wherein a plurality of the left liquid inlets are all formed on the end face of the left valve body facing the right valve body and are round; the right liquid inlet is formed in the end face of the right valve body, facing the left valve body, and is round; the left liquid inlet and the right liquid inlet are arranged in a staggered manner;

5. The multiway valve according to claim 2, wherein the left port and the right port of the second channel are respectively provided with a valve seat ring, annular first step surfaces are respectively formed on the inner walls of the second channels inside the two valve seat rings, an inner hexagonal nut is arranged between the valve seat rings and the first step surfaces, a spring which deforms under the action of the inner hexagonal nut to generate axial force is arranged on the inner hexagonal nut, and a thrust ring which pushes the valve seat rings under the action of the spring is arranged between the spring and the valve seat rings.

6. The multiway valve of claim 1, wherein a plug is disposed on the left valve body at a position corresponding to one of the plurality of left liquid inlets; and a plug is arranged on the right valve body at a position corresponding to one of the right liquid inlets.

7. The multiway valve of claim 2, wherein a second stepped surface facing the right valve body is formed on the valve core body, a right shaft sleeve is arranged in the right mounting hole in an interference fit manner, the right shaft sleeve is sleeved on the valve core body, and the right shaft sleeve can abut against the second stepped surface when the rotary valve core axially moves.

8. The multiway valve according to claim 2, wherein a third stepped surface facing the left valve body is formed on the valve core body, a left shaft sleeve is arranged in the left mounting hole in a clearance fit manner, the left shaft sleeve is sleeved on the rotary valve core, the right end of the left shaft sleeve is abutted against the third stepped surface, and the left end of the left shaft sleeve protrudes out of the left end of the valve core body;

9. The multiway valve according to claim 2, wherein an annular gap is formed between the wall of the section of the right mounting hole, which is close to the outer side, and the valve core body, sealing filler is filled in the annular gap, a gland is sleeved on the valve core body, the gland is pressed against the sealing filler, and the gland is pre-tightened through a fastener.

10. The multiway valve of claim 1, wherein the collection port is provided on the left valve body and is annular, and the metering port is located in the collection port;