WO2014110888A1

WO2014110888A1 - Multi-way valve

Info

Publication number: WO2014110888A1
Application number: PCT/CN2013/076865
Authority: WO
Inventors: 姚建设; 高智; 万明敏
Original assignee: 克拉玛依市金牛信泰石油设备有限公司
Priority date: 2013-01-21
Filing date: 2013-06-06
Publication date: 2014-07-24
Also published as: CN103939641A

Abstract

A multi-way valve comprises an upper valve body (1), a lower valve body (2) and a rotary valve core (3). An upper assembly hole for assembling the rotary valve core (3) is opened inside the upper valve body (1), and a lower assembly hole for assembling the rotary valve core (3) is opened inside the lower valve body (2). The rotary valve core (3) penetrates through the upper assembly hole and the lower assembly hole. An upper rolling bearing (4) for assembling with the upper valve body (1) is arranged on the rotary valve core (3) located in the upper assembly hole, and a lower rolling bearing (5) for assembling with the lower valve body (2) is arranged on the rotary valve core (3) located in the lower assembly hole. A lower part of the rotary valve core (3) is located in the lower assembly hole, and an upper end of the rotary valve core (3) extends from the upper assembly hole. The rotary valve core (3) of the multi-way valve is fixed using the upper and lower rolling bearings (4, 5), enabling the multi-way valve to adapt to a working environment with a high pressure level, and enabling the rotary valve core (3) to run stably.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-way valve, and more particularly to a multi-way valve with a gap-tight double-sealed structure for measuring the production of a single well in an oil well to obtain dynamic oil well production data, belonging to petroleum and chemical oil and gas collections. The field of transmission systems. BACKGROUND OF THE INVENTION Multi-way valves currently used in the oil industry field mainly use a flat seal pair (see Chinese Patent Application No. 200420006528. 1, Authorization Bulletin No. CN2709740Y) and a cylindrical seal pair for sealing. The seat seal of the multi-way valve with cylindrical seal pair is made of soft material. The wear compensation is provided by the elastic element during the working process. When the end of a seal wear period is completed, the maintenance needs to be stopped. Sealing the secondary rotary multi-way valve. The flange of the inlet of the liquid pipe is adjusted by a special adjustment tool to press the elastic element and act on the seat ring to resume production after providing the sealing specific pressure.

The structural feature of the rotary multi-way valve adopting the plane sealing pair is that a plurality of circular cross-section flow passage inlet ports are uniformly distributed on the plane circumference, and the sealing seat of the valve seat sealing ring is made of cemented carbide material, and the plane grinding processing is convenient, and the plane sealing pair is convenient. Reliable sealing and long working life. When the size of the inlet of the circular cross-section flow passage is large (such as 3", 4" or 5"), the fan-shaped flow passage sealing pair multi-way valve is used (see application number 200620167076. 4 , the Chinese utility model patent with the authorization bulletin number CN201034178Y, maintains the basic consistency with the size of the multi-way valve body using the cylindrical seal pair, but when the pressure level is high, there is pressure fluctuation and the pressure of each chamber is different. The pressure difference formed causes the rotation of the rotary valve core to change, the valve core operation process is not stable, the torque will be biased, and even the valve core may be stuck. At the same time, the leakage of the multi-way valve with the sealing surface may occur. Content In view of the above problems in the prior art, the technical problem to be solved by the present invention is to provide a multi-way valve in which the spool is smoothly operated.

In order to solve the above technical problem, the present invention adopts the following technical solutions: A multi-way valve includes an upper valve body, a lower valve body, and a rotary valve core, and the upper valve body is provided with an upper portion for mounting the rotary valve core a lower mounting hole in the lower valve body, wherein the rotary valve core is disposed in the upper mounting hole and the lower mounting hole, and is located at the upper mounting hole The rotary valve core is provided with an upper rolling bearing for assembling with the upper valve body, and the rotary valve core located at the lower fitting hole is provided with a lower rolling bearing for assembling with the lower valve body. A lower portion of the rotary spool is located in the lower fitting hole, and an upper end of the rotary spool protrudes from the upper fitting hole.

Preferably, the rotary valve core located in the upper fitting hole has a smaller outer diameter near the upper end of the rotary valve core, and a smaller diameter outer diameter away from the upper end of the rotary valve core, and is formed. An annular first boss, an inner ring of the upper rolling bearing abuts on the first boss;

The rotary valve core located in the lower fitting hole has a smaller outer diameter close to a lower end of the rotary valve core, and a smaller diameter outer diameter away from a lower end of the rotary valve core, forming a ring shape a second boss, the inner ring of the lower rolling bearing abuts on the second boss; the rotating valve core is sleeved on the upper rolling bearing for adjusting the axial direction of the upper rolling bearing and the lower rolling bearing Adjusting nut for clearance.

Preferably, the upper rolling bearing and the lower rolling bearing are tapered roller bearings. Preferably, the adjusting nut has a plurality of axial fitting holes, and the fitting holes are provided with positioning screws for adjusting the position of the adjusting nut and fixing the adjusting nut to the upper valve body.

Preferably, a sealing assembly is disposed between the rotating valve core above the adjusting nut and the upper valve body; and a spacing between the rotating valve core and the upper valve body below the upper rolling bearing is disposed Two sealing rings; two sealing rings are arranged between the rotating valve core above and below the lower rolling bearing and the lower valve body.

Preferably, the sealing assembly comprises a sealing ring sleeve sleeved on the rotating valve core and pressed against the adjusting nut, a sealing packing on the sealing ring, and a sleeve The pressure ring on the rotary valve core and pressed against the sealing packing and a fastener acting on the pressure ring for preloading the pressure ring.

Preferably, the upper valve body and the lower valve body contact surface are sealed by a concave-convex groove sealing gasket, and the axial matching faces of the upper valve body and the lower valve body are sealed by a sealing ring.

Preferably, the middle portion of the rotary valve core is provided with a first passage penetrating therein, and the upper valve body is provided with a second passage passage penetrating the first passage, the first passage and the second passage a valve seat ring is disposed at an opposite end, an annular third boss is formed on an inner wall of the first passage, and the first passage between the valve seat ring and the third boss is disposed at the first An inner hexagonal nut on the three bosses, wherein the inner hexagonal nut is disposed on the inner hexagonal nut to deform a disc spring which generates an axial force, and the disc spring is disposed above the disc spring A thrust ring that is pushed upwards under action, and a seal ring for sealing the rotary valve core and the seat ring is disposed between the thrust ring and the valve seat ring.

The beneficial effects of the multi-way valve of the present invention over the prior art are:

1. The rotary valve core of the multi-way valve of the present invention is fixed by upper and lower rolling bearings, so that the multi-way valve of the invention can adapt to the working environment of high pressure level and make the rotary valve core run smoothly.

2. The axial clearance of the upper and lower rolling bearings of the multi-way valve of the present invention can be adjusted by adjusting the nut according to actual requirements. Therefore, the multi-way valve of the invention has the advantages of high positioning accuracy and smoother operation of the rotary spool, and overcomes Excessive pressure levels can cause the weight of the rotating spool to appear.

3. The rotary valve core of the multi-way valve of the present invention and the upper and lower valve bodies, between the upper valve body and the lower valve body, and the first passage of the rotary valve core and the second passage of the upper valve body The double seal structure makes the seal more reliable and has a longer service life. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view of a multi-way valve according to an embodiment of the present invention;

Figure 2 is an enlarged view of a portion A in Figure 1;

Figure 3 is an enlarged view of a portion B in Figure 1;

4 is a schematic view showing the structure of an adjusting nut in a multi-way valve according to an embodiment of the present invention. Description of the reference numerals L-upper body 2 - lower valve body

3-rotating spool 4-upper rolling bearing

5-low rolling bearing 6-first boss

7-second boss 8-adjustment nut

9-positioning screw 10-fit hole

11-first sealing ring 12-second sealing ring

13-seal retaining ring 14-seal packing

15-pressure ring 16-fastener

17-double stud 18-convex groove washer

19-third sealing ring 20-first channel

21-Second passage 22-Valve seat ring

23-third boss 24-inner hexagon nut

25-disc spring 26-thrust ring

27-seal ring 28-plug

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but not to limit the invention.

As shown in FIG. 1 to FIG. 4, a multi-way valve disclosed in an embodiment of the present invention includes an upper valve body 1, a lower valve body 2 and a rotary valve core 3, and the upper valve body 1 is provided with a through-opening for loading The upper assembly hole (not shown) of the rotary valve core 3 is disposed, and the rotary valve core 3 passes through the upper assembly hole, so that the upper valve body 1 is symmetrically disposed on both sides of the rotary valve core 3, and the rotary valve core 3 is rotated. The upper end projects beyond the upper fitting hole to form an operating end for facilitating the rotation of the rotary valve body 3. The lower valve body 2 is provided with a lower fitting hole (not shown) for mounting the rotary valve core 3, and a lower portion of the rotary valve core 3 is located in the lower fitting hole, in order to facilitate assembly of the rotary spool 3, shaft To position and to withstand axial and radial loads, the rotary spool 3 at the upper fitting hole is provided with an upper rolling bearing 4 for fitting with the upper valve body 1, and a rotary spool located at the lower fitting hole A lower rolling bearing 5 for fitting to the lower valve body 2 is provided on the third. As a preferred embodiment of the present embodiment, as shown in FIGS. 1 and 2, the rotary valve body 3 located in the upper fitting hole has a reduced-diameter cylindrical shape, and the outer diameter of the upper end of the rotary valve body 3 is smaller than the rotation. The outer diameter of the upper end of the spool 3 is such that the rotary valve body 3 forms an annular first boss 6 in the upper fitting hole, and the inner ring of the upper rolling bearing 4 abuts on the first boss 6. The rotary spool 3 located in the lower fitting hole is also a reduced-diameter cylindrical shape, and an outer diameter of the lower end of the rotary spool 3 is smaller than an outer diameter of the lower end of the rotary spool 3, so that the rotary spool 3 is An annular second boss 7 is formed in the lower fitting hole, and the inner ring of the lower rolling bearing 5 abuts on the second boss 7. In order to adjust the axial play of the upper rolling bearing 4 and the lower rolling bearing 5 to prevent the spinning spool 3 from being stuck during use, the adjusting nut 8 above the upper rolling bearing 4 is sleeved on the rotary valve core 3.

The bearing support structure of the rotary valve body 3 of the multi-way valve of the present invention assembled with the upper valve body 1 and the lower valve body 2 through the upper rolling bearing 4 and the lower rolling bearing 5 has the advantages of high positioning accuracy and can ensure the rotary valve The core 3 operates more smoothly, overcoming the phenomenon of the weight of the rotating spool 3 when the pressure level is too high.

As a further preferred embodiment of the present embodiment, both the upper rolling bearing 4 and the lower rolling bearing 5 are tapered roller bearings to effectively withstand radial loads and axial loads.

As a further preferred embodiment of the embodiment, the adjustment nut 8 after the adjustment of the position needs to be fixed to the upper valve body 1 by the set screw 9. Since only two symmetrical positioning holes (not shown) are provided on the upper valve body 1. In order to rotate the rotary nut 8 to any position, there is a fitting hole corresponding to the positioning hole on the upper valve body 1. As shown in Fig. 4, the adjusting nut 8 of the multi-way valve of the present invention is provided with a plurality of axial fitting holes 10, that is, the adjusting nut 8 is a porous adjusting nut. A set screw 9 is bored in the mating hole 10 and the corresponding positioning hole for fixing the adjusting nut 8 to the upper valve body 1.

When assembling, the upper rolling bearing 4 should be installed first, and the rotation thereof is ensured to be smooth and flexible. Then, the adjusting nut 8 is loaded, and the axial gap (axial clearance) of the upper rolling bearing 4 is adjusted by the adjusting nut 8. 15 mn! The numerical clearance of the adjusting nut 8 and the upper rolling bearing 4 is maintained at 0. 15 mn! ~ 0. 20mm between, so that the upper rolling bearing 4 is flexible. Finally, insert the positioning screw 9 into the fitting hole 10 and the most suitable fixing hole, and tighten the set screw with a flat-shaped screwdriver. 9.

As another preferred embodiment of the present embodiment, as shown in FIG. 2, in order to ensure the seal between the rotary valve body 3 and the upper valve body 1, the rotary valve core 3 above the adjusting nut 8 is disposed between the upper valve body 1 and the upper valve body 1. There is a sealing assembly; two first sealing rings 11 are arranged between the rotating valve core 3 below the upper rolling bearing 4 and the upper valve body 1; the rotating valve core 3 and the lower valve body 2 above and below the lower rolling bearing 5 There are two second sealing rings 12 spaced apart. The above-mentioned sealing assembly and each sealing ring are arranged to achieve a good sealing effect, so that leakage of each mating sealing surface is not caused.

As a further preferred embodiment of the embodiment, the sealing assembly comprises a sealing collar 13, a sealing packing 14, a pressure ring 15 and a fastener 16, and the sealing collar 13 is sleeved on the rotary valve core 3 and pressed against the adjusting nut 8 , the sealing ring 13 is arranged to function as a first layer of sealing, the sealing packing 14 is disposed on the sealing ring 3 , the pressure ring 15 is sleeved on the rotating valve core 3 and located above the sealing packing 14 , the pressure ring The fasteners 16 are provided on the 15 and the pressure ring 15 is pressed against the sealing packing 14 by pre-tightening the fasteners 16 on the pressure ring 15, and the sealing packing 14 forms a second layer of sealing. The fastener 16 in this embodiment is a bolt and a nut that is sleeved on the bolt, and the pressure ring 15 can be pressed against the sealing packing 14 by pre-tightening the nut.

As a further preferred embodiment of the present embodiment, as shown in Fig. 1, the upper valve body 1 of the multi-way valve of the present invention is located above the lower valve body 2, the lower surface of the upper valve body 1 and the lower valve body 2 The surfaces are fitted to each other to form a contact surface, and the upper valve body 1 and the lower valve body 2 are fastened together by a plurality of studs 17 which are evenly distributed on the upper valve body 1. The contact faces of the upper valve body 1 and the lower valve body 2 are sealed by a concave-convex groove sealing washer 18. Continuing with Fig. 1, the lower end of the upper valve body 1 is fitted into the lower valve body 2, so that the third sealing ring 19 is provided at the axial matching surface of the upper valve body 1 and the lower valve body 2 at the insertion portion for sealing. Therefore, the axially sealed mating surface and the contact surface of the upper valve body 1 and the lower valve body 2 constitute a double seal, which has the advantages of high pressure resistance, long-term safe use and reliability.

As a further preferred embodiment of the present embodiment, as shown in FIG. 1 and FIG. 3, the middle portion of the rotary valve body 3 is provided with a first passage 20 penetrating therethrough, and the upper valve body 1 is provided with a through hole opposite to the first passage 20 The second passage 21, the seat ring 22 is disposed in the opposite end of the first passage 20 and the second passage 21, in order to achieve a seal between the rotary spool 3 and the seat ring 22, The lower sealing structure: a third boss 23 is formed on the inner wall of the first passage 20, and the inner hexagonal nut on the third boss 23 is disposed in the first passage 20 between the seat ring 22 and the third boss 23. 24, the inner hexagonal nut 24 includes two cylindrical portions having unequal outer diameters, one end having a larger outer diameter is located on the third boss 23, and the end having a smaller outer diameter is facing the seat ring 22, and the outer diameter is smaller. The outer casing is provided with a disc spring 25, the disc spring 25 is provided with a thrust ring 26, and a seal ring 27 is disposed between the thrust ring 26 and the inner wall of the first passage 20.

As shown in FIG. 1 and FIG. 3, when the inner hexagonal nut 24 needs to be adjusted, the wire plug 28 is first removed, and a special adjustment tool (not shown) is inserted into the second passage 21, and then acts inside. The inner cavity of the hexagonal nut 24 drives the inner hexagonal nut 24 to move upward. During the upward movement of the inner hexagonal nut 24, the disc spring 25 is compressed and deformed, and an axial force is generated to push the thrust ring 26, and the thrust ring 26 is pressed. The sealing ring 27 causes the sealing ring 27 to expand radially, thereby functioning as a seal, thereby achieving the purpose of increasing the sealing and bonding force of the multi-way valve of the present invention. After adjustment, remove and remove the adjustment tool and install the plug 28. In order to achieve the double seal effect, a fourth seal ring 29 is additionally provided between the seat ring 22 and the inner wall of the rotary valve body 3. The above embodiments are merely exemplary embodiments of the invention, and are not intended to limit the invention, and the scope of the invention is defined by the claims. A person skilled in the art can make various modifications or equivalents to the invention within the spirit and scope of the invention, and such modifications or equivalents are also considered to be within the scope of the invention.

Claims

Rights request

1. A multi-way valve, including an upper valve body, a lower valve body, and a rotary valve core, characterized in that the upper valve body is provided with an upper assembly hole for installing the rotary valve core, and the lower valve body is provided with an upper assembly hole for installing the rotary valve core. A lower assembly hole is provided for installing the rotary valve core. The rotary valve core is penetrated through the upper assembly hole and the lower assembly hole. The rotary valve core located at the upper assembly hole is provided with There is an upper rolling bearing for assembly with the upper valve body. The rotary valve core located at the lower assembly hole is provided with a lower rolling bearing for assembly with the lower valve body. The lower part of the rotary valve core is located at the lower assembly hole. In the lower assembly hole, the upper end of the rotary valve core extends out of the upper assembly hole.

2. The multi-way valve according to claim 1, wherein the outer diameter of the rotary valve core located in the upper assembly hole is smaller close to the upper end of the rotary valve core and farther away from the rotary valve core. The upper end is a variable diameter cylindrical shape with a large outer diameter, forming an annular first boss, and the inner ring of the upper rolling bearing is in contact with the first boss;

The rotary valve core located in the lower assembly hole is a variable-diameter cylindrical shape with a small outer diameter close to the lower end of the rotary valve core and a large outer diameter away from the lower end of the rotary valve core, forming an annular third Two bosses, the inner ring of the lower rolling bearing is in contact with the second boss; the rotary valve core is provided with a valve located above the upper rolling bearing for adjusting the axial direction of the upper rolling bearing and the lower rolling bearing. Adjustment nut for clearance.

3. The multi-way valve according to claim 1 or 2, characterized in that the upper rolling bearing and the lower rolling bearing are both tapered roller bearings.

4. The multi-way valve according to claim 2, characterized in that the adjusting nut has a plurality of axial fitting holes, and the fitting holes are used to adjust the position of the adjusting nut and adjust the adjusting nut. The nut is fixed to the positioning screw on the upper valve body.

5. The multi-way valve according to claim 2 or 4, characterized in that, a sealing assembly is provided between the rotating valve core above the adjusting nut and the upper valve body; Two spaced sealing rings are provided between the rotary valve core and the upper valve body; two spaced sealing rings are provided between the rotary valve core and the lower valve body above and below the lower rolling bearing. Road sealing ring.

6. The multi-way valve according to claim 5, characterized in that, the sealing assembly includes a sealing retaining ring sleeved on the rotary valve core and pressed against the adjusting nut, and is located on the sealing retaining ring. The sealing packing on the ring, the pressure ring that is sleeved on the rotary valve core and presses against the sealing packing, and the fasteners that act on the pressure ring to pre-tighten the pressure ring.

7. The multi-way valve according to claim 1, characterized in that, the contact surface of the upper valve body and the lower valve body is sealed by a concave and convex groove sealing gasket, and the axial mating surface of the upper valve body and the lower valve body is Seal with sealing ring.

8. The multi-way valve according to claim 1, wherein a first penetrating passage is formed in the middle of the rotary valve core, and a third penetrating passage opposite to the first passage is formed in the upper valve body. Two channels, a valve seat ring is provided at the opposite end of the first channel and the second channel, an annular third boss is formed on the inner wall of the first channel, the valve seat ring and the third boss A hexagonal inner nut located on the third boss is provided in the first channel, and a disc spring is provided on the hexagonal inner nut that deforms under the action of the hexagonal inner nut to generate an axial force, so A thrust ring is arranged above the disc spring to push upward under the action of the disc spring. A thrust ring is arranged between the thrust ring and the valve seat ring for sealing the rotating valve core and the valve seat ring. sealing ring.