A multi-way rotary valve

Abstract

The present invention discloses a multi-way rotary valve, comprising a valve body, a valve cover, a rotating shaft and a driving device. The valve body is provided with a plurality of input ports, a mixed output port and a single output port, and the valve body is provided with a lower positioning shaft hole. The valve cover is detachably mounted on the valve body, and an angular flow channel is provided therein for communicating one-to-one with the input ports. The valve cover is provided with an upper positioning self-lubricating bearing hole. The flow channel in the rotating shaft is communicated with the angular flow channel of the valve cover, and the lower end is rotatably arranged in the lower positioning shaft hole. The driving device arranged on the valve cover is connected to the rotating shaft through a valve stem to drive the rotating shaft to rotate. The present invention increases the accuracy while reducing the friction of the rotating shaft by connecting the upper and lower ends of the rotating shaft to the upper self-lubricating bearing and the lower positioning shaft hole that can be radially positioned, and also prevents the valve stem from bearing radial forces, thereby improving the radial and axial load-bearing capacity of the rotating shaft and increasing the service life of the multi-way rotary valve.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-way valves, and in particular to a multi-way rotary valve. Background Art

[0002] Valves are pipe accessories used to open and close pipelines, control piping, control flow direction, and regulate and control the parameters of the conveyed medium (temperature, pressure, and flow). Based on their function, they can be categorized as shutoff valves, check valves, and regulating valves. Valves are control components in fluid conveying systems, performing functions such as shutoff, regulation, flow diversion, backflow prevention, pressure stabilization, flow diversion, and overflow pressure relief. Valves used in fluid control systems come in a wide variety of types and specifications, from the simplest shutoff valve to the most complex valves used in automated control systems.

[0003] Multi-way valves are a common type of valve used in oilfields to measure well production. For example, Chinese invention patent CN113494625A describes a digitally controlled multi-way valve with a dual-piston, dual-seal structure. The valve comprises a housing with a well crude oil inlet, a mixed flow channel outlet, and a metering outlet; a valve core internally provided with an angular flow channel connecting the crude oil inlet and the metering outlet; and a dual-piston, dual-seal structure located at the crude oil inlet. The valve core comprises a first piston and a second piston, the second piston being mounted within the first piston. The first piston, the second piston, and the valve core dual-seal structure are arranged in contact with each other, and the outlet of the second piston is in sealed contact with the crude oil inlet of the oil well. However, this solution has the following disadvantages:

[0004] A connecting rod is provided on the top surface of the valve core, and the lower end of the valve core is rotatably provided on the metering outlet. Since an angular flow channel for communicating with the crude oil inlet and the metering outlet is provided in the valve core, when the crude oil medium enters the angular flow channel through the crude oil inlet, the valve core needs to bear a large axial and radial load, which can easily cause the connecting rod to deform or the valve core to get stuck, thereby reducing the service life of the multi-way valve.

[0005] In view of this, there is an urgent need to improve the multi-way valve structure in the prior art to increase the load-bearing capacity of the valve core and extend the service life of the multi-way valve. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the valve core of the existing multi-way valve has a weak bearing capacity, which easily causes the connecting rod to deform or the valve core rotating shaft to get stuck, thereby shortening its service life.

[0007] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0008] A multi-way rotary valve, comprising:

[0009] The valve body has a plurality of input ports, a mixed output port and a single output port on its outer surface, the input ports being connected to the interior of the valve body through a horizontal input pipe; the mixed output port being connected to the inner cavity of the valve body; a lower positioning shaft hole being provided in the valve body, the lower positioning shaft hole being connected to the single output port;

[0010] A valve cover is detachably mounted on the valve body, wherein an angular flow channel is provided in the valve cover, and the angular flow channel is connected to the multiple input ports of the valve body in a one-to-one correspondence; an upper positioning self-lubricating bearing hole is provided in the center of the valve cover;

[0011] A rotating shaft, wherein a rotating shaft flow channel is provided inside the rotating shaft flow channel, the inlet end of the rotating shaft flow channel is communicated with the angular flow channel, and the lower end of the rotating shaft flow channel is rotatably disposed in the lower positioning shaft hole and communicated with the single output port;

[0012] The driving device is arranged on the valve cover, the lower end of which passes through the upper positioning self-lubricating bearing hole and is connected to the rotating shaft to drive the rotating shaft to rotate.

[0013] In the above solution, preferably, the valve cover includes:

[0014] A flange portion is provided on the top opening of the valve body and is detachably connected to the valve body via bolts;

[0015] The valve cover flow channel portion is arranged on the lower end of the flange portion and extends into the inner cavity of the valve body. The multiple angular flow channels are arranged on the side of the valve cover flow channel portion; a sealing stuffing box and a valve stem hole are provided at the center of the top surface of the valve cover flow channel portion.

[0016] In the above solution, preferably, a sealing ring is provided on the side surface of the valve cover flow channel portion and the inner side surface of the valve body.

[0017] In the above scheme, preferably, a self-compensating seal is provided on the inlet end of the rotating shaft flow channel for forming a seal with the angular flow channel, the self-compensating seal includes a hard sealing valve seat and a self-compensating spring, a sealing step is provided on the inlet end of the rotating shaft flow channel, the hard sealing valve seat is provided on the sealing step, and the self-compensating spring is provided between the hard sealing valve seat and the sealing step.

[0018] In the above solution, preferably, the driving device includes:

[0019] An electric actuator is arranged at the upper end of the bracket; the electric actuator is provided with an embedded computer chip and a hand wheel;

[0020] The valve stem is installed in the bracket and passes through the valve cover, with the upper end of the valve stem connected to the electric actuator and the lower end of the valve stem connected to the rotating shaft.

[0021] In the above solution, preferably, a pointer alignment indicating device is provided on the bracket.

[0022] In the above solution, preferably, the rotating shaft includes:

[0023] A rotating shaft, a valve stem mounting portion being provided on the top surface thereof, wherein the lower end of the valve stem is disposed in the valve stem mounting portion; the rotating shaft, the valve stem, the upper positioning self-lubricating bearing hole, and the lower positioning shaft hole are coaxially disposed;

[0024] A single input inlet pipe is arranged on one side of the rotating shaft. A hollow flow channel is provided inside the rotating shaft to form the angular flow channel with the single input inlet pipe.

[0025] In the above solution, preferably, a positioning groove is provided below the upper positioning self-lubricating bearing hole, and an anti-flying-out mechanism is provided in the positioning groove, including:

[0026] A self-lubricating bearing is arranged in the valve stem mounting portion, and the lower end of the valve stem is arranged in the self-lubricating bearing;

[0027] A skeleton oil seal is sleeved on the valve stem and arranged above the self-lubricating bearing;

[0028] A plane bearing is sleeved on the valve stem and arranged below the upper positioning self-lubricating bearing hole.

[0029] In the above scheme, preferably, a sealing box is provided on the top surface of the valve cover, the upper positioning self-lubricating bearing hole is provided on the bottom surface of the sealing box, the valve stem is provided in the valve stem hole, and a sealing packing is provided between the valve stem hole and the side of the sealing box.

[0030] In the above solution, preferably, the joints between the horizontal input pipe and the vertical input pipe, and the joints between the single input pipe and the vertical input pipe are both provided with alloy hardened sealing surfaces and self-compensating sealing structures.

[0031] In the above solution, preferably, the input port, the mixed output port and the single output port are all provided with flanges for connecting to pipelines.

[0032] Compared with the prior art, the multi-way rotary valve provided by the present invention is connected with the angular flow channel on the valve cover through the rotating shaft flow channel, thereby reducing the axial load on the rotating shaft when the medium flows in; at the same time, the driving device is connected with the rotating shaft through the upper positioning self-lubricating bearing hole, and the lower end of the rotating shaft is arranged in the lower positioning shaft hole, thereby improving the bearing capacity of the axial and radial loads of the rotating shaft, while increasing the accuracy of the rotating shaft, reducing the friction of the rotating shaft, avoiding the valve stem from being subjected to radial force, avoiding the rotating shaft from getting stuck during operation, etc., and extending the service life of the multi-way rotary valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic cross-sectional view of the multi-way rotary valve of the present invention;

[0034] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0035] Figure 3 for Figure 1 A magnified schematic diagram of B.

[0036] in, Figures 1 to 3 The corresponding relationship between the names of the components and the reference numerals is as follows:

[0037] Valve body 1, valve cover 2, rotating shaft 3, driving device 4,

[0038] Input port 11, mixed output port 12, single output port 13, horizontal input pipe 14,

[0039] Flange portion 21, valve cover flow channel portion 22,

[0040] Angle flow channel 221, sealing stuffing box 227, upper positioning self-lubricating bearing hole 229,

[0041] Rotating shaft 31, single input pipe 32, hard sealing valve seat 33, self-compensating spring 34,

[0042] Valve stem mounting seat 311, self-lubricating bearing 312, skeleton oil seal 313, plane bearing 314,

[0043] Valve stem 41 , electric actuator 42 , hand wheel 43 , bracket 44 , rotating bracket 45 . DETAILED DESCRIPTION

[0044] The present invention provides a multi-way rotary valve. A T-shaped channel is formed by a horizontal inlet pipe on the valve body and a vertical inlet pipe on the bottom surface of the valve cover. This reduces the wear of the pipeline sealing structure by medium particles in the pipeline and improves the sealing performance of the pipeline joints. The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] like Figure 1 、 Figure 2 and Figure 3 As shown, the multi-way rotary valve provided by the present invention includes a valve body 1, a valve cover 2, a rotating shaft 3 and a driving device 4. The rotating shaft 3 is arranged in the inner cavity of the valve body 1, and the valve cover 2 is detachably mounted on the valve body 1. The driving device 4 is connected to the rotating shaft 3 for driving the rotating shaft 3 to rotate.

[0046] The outer surface of the valve body 1 is provided with multiple input ports 11, a mixed output port 12, and a single output port 13. Each of the input ports 11, 12, and 13 is equipped with flanges for connecting to pipelines. A horizontal input pipe 14 is provided within the valve body 1, connected to the input port 11. The input port 11 communicates with the inner cavity of the valve body 1 through the horizontal input pipe 14. The mixed output port 12 is provided on the bottom surface of the valve body 1 and communicates with the inner cavity of the valve body 1. A lower positioning shaft hole 15 is also provided within the valve body 1, communicating with the single output port 13.

[0047] The valve cover 2 includes a flange portion 21 and a valve cover flow channel portion 22 disposed on the bottom surface of the flange portion 21. The flange portion 21 is mounted on the top opening of the valve body 1 and is removably connected to the valve body 1 via bolts. The valve cover flow channel portion 22 is disposed within the inner cavity of the valve body 1. The side surfaces of the valve cover flow channel portion 22 are provided with multiple angled flow channels 221. These angled flow channels 221 correspond one-to-one with and maintain communication with the inlet 11 on the valve body 1. A sealing ring is also provided on the inner surface of the valve cover flow channel portion 22 and the valve body 1 to improve the sealing between the valve cover flow channel portion 22 and the valve cover 1 and prevent leakage from the valve cover 2.

[0048] A sealing stuffing box 227 and a valve stem hole are provided at the center of the top surface of the valve cover flow channel portion 22. The valve stem hole is located on the bottom surface of the sealing stuffing box 227, and sealing packing is installed in the sealing stuffing box 227. An upper positioning self-lubricating bearing hole 229 is also provided at the center of the bottom surface of the valve cover flow channel portion 22. The upper positioning self-lubricating bearing hole 229 is located on the bottom surface of the sealing stuffing box 227.

[0049] Rotating shaft 3 is rotatably mounted within valve body 1 and comprises a rotating shaft 31 and a single-input inlet pipe 32 disposed on one side of rotating shaft 31. A hollow flow channel is defined within rotating shaft 31, forming a rotating shaft flow channel with the single-input inlet pipe 32. The upper end of the single-input inlet pipe 32 is connected to the lower end of the vertical inlet pipe 221, while the lower end of rotating shaft 31 is rotatably mounted on the mixed output port 12.

[0050] A self-compensating seal is provided at the inlet end of the rotating shaft flow channel on the rotating shaft 3, which is used to form a seal with the angled flow channel 221 on the valve cover 2. The self-compensating seal includes a hard-sealing valve seat 33 and a self-compensating spring 34. A sealing step is provided at the inlet end of the rotating shaft flow channel, and the hard-sealing valve seat 33 is disposed on the sealing step. The self-compensating spring 34 is disposed between the hard-sealing valve seat 33 and the sealing step.

[0051] The drive device 4 includes a valve stem 41, an electric actuator 42, and a handwheel 43. The valve stem 41 is mounted on the flange portion 21 via a bracket 44. The lower end of the valve stem 41 extends through the upper positioning self-lubricating bearing hole 229 and into the inner cavity of the valve body 1. A valve stem mounting seat 311 is provided on the top surface of the rotating shaft 31. A positioning groove is also provided below the upper positioning hole 229. The positioning groove contains an anti-flyout structure. The anti-flyout structure includes a self-lubricating bearing 312, a skeleton oil seal 313, and a plane bearing 314. The self-lubricating bearing 312 is disposed within the valve stem mounting portion 311, and the lower end of the valve stem 41 is disposed within the self-lubricating bearing 312; the skeleton oil seal 313 is mounted on the valve stem 41, above the self-lubricating bearing 312; and the plane bearing 314 is mounted on the valve stem 41, below the upper positioning self-lubricating bearing hole 229.

[0052] Electric actuator 42 is mounted on the upper end of valve stem 41 via a rotating bracket 45. An embedded computer chip within electric actuator 42 enables precise rotation of shaft 3, enabling both manual and automatic well selection for the multi-way rotary valve. It also features 360° rotation, precise multi-axis position determination of the drive shaft and valve position, control, upload, and 485 communication. A handwheel 43 is connected to valve stem 41 for manual control of valve stem 41.

[0053] The bracket 44 is also provided with a pointer alignment indicating device for indicating the rotation angle of the valve stem 41, thereby ensuring accurate positioning of the rotating shaft.

[0054] The working process of the present invention is as follows:

[0055] The valve stem 41 is driven to rotate by the electric actuator 42 or the handwheel 43, and the valve stem 41 drives the rotating shaft 32 of the rotating shaft 3 to rotate, so that the single input pipe 33 is connected to the lower end of the vertical input pipe 221 to form a single output channel. The medium enters the valve body 1 from the input port 11, enters the rotating shaft 31 through the T-shaped channel formed by the horizontal input pipe 14 and the vertical input pipe 211, and is output along the single output port 13 through the single input input pipe 32.

[0056] Compared with the prior art, the multi-way rotary valve provided by the present invention is connected with the angular flow channel on the valve cover through the rotating shaft flow channel, thereby reducing the axial load on the rotating shaft generated when the medium flows in; thereby reducing the radial load of the medium on the rotating shaft; the upper end of the rotating shaft of the rotating shaft is connected to the valve stem passing through the upper positioning self-lubricating bearing hole, and the lower end is rotatably set in the lower positioning shaft hole, thereby realizing the coaxial setting of the rotating shaft and the valve stem and the upper and lower positioning shaft holes, greatly improving the axial bearing capacity of the rotating shaft, thereby avoiding deformation and jamming of the rotating shaft with the extension of use time, ensuring the normal rotation of the rotating shaft, and extending the service life of the multi-way rotary valve.

[0057] In the present invention, a positioning groove is provided below the upper positioning self-lubricating bearing hole, an anti-flying-out mechanism is provided in the positioning groove, the valve stem is arranged in the self-lubricating bearing, and the skeleton oil seal and the plane bearing are sleeved on the valve stem to limit the valve stem and prevent the lower end of the valve stem from being separated from the rotating shaft of the rotating shaft, thereby improving the structural stability of the multi-way rotary valve.

[0058] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the scope of protection of the present invention.

Claims

1. A multi-way rotary valve, characterized in that: include: The valve body has a plurality of input ports, a mixed output port and a single output port on its outer surface, the input ports being connected to the interior of the valve body through a horizontal input pipe; the mixed output port being connected to the inner cavity of the valve body; a lower positioning shaft hole being provided in the valve body, the lower positioning shaft hole being connected to the single output port; A valve cover is detachably mounted on the valve body, wherein an angular flow channel is provided in the valve cover, and the angular flow channel is connected to the multiple input ports of the valve body in a one-to-one correspondence; an upper positioning self-lubricating bearing hole is provided in the center of the valve cover; A rotating shaft, wherein a rotating shaft flow channel is provided inside the rotating shaft flow channel, the inlet end of the rotating shaft flow channel is communicated with the angular flow channel, and the lower end of the rotating shaft flow channel is rotatably disposed in the lower positioning shaft hole and communicated with the single output port; A driving device is provided on the valve cover, the lower end of which passes through the upper positioning self-lubricating bearing hole and is connected to the rotating shaft to drive the rotating shaft to rotate; A self-compensating sealing device is provided on the inlet end of the rotating shaft flow channel for forming a seal with the angled flow channel. The self-compensating sealing device includes a hard sealing valve seat and a self-compensating spring. A sealing step is provided on the inlet end of the rotating shaft flow channel. The hard sealing valve seat is provided on the sealing step. The self-compensating spring is provided between the hard sealing valve seat and the sealing step. The driving device comprises: An electric actuator is arranged at the upper end of the bracket; the electric actuator is provided with an embedded computer chip and a hand wheel; a valve stem, mounted in the bracket and passing through the valve cover, with an upper end connected to the electric actuator and a lower end connected to the rotating shaft; The rotating shaft includes: A rotating shaft, a valve stem mounting portion being provided on the top surface thereof, wherein the lower end of the valve stem is disposed in the valve stem mounting portion; the rotating shaft, the valve stem, the upper positioning self-lubricating bearing hole, and the lower positioning shaft hole are coaxially disposed; A single input inlet pipe is provided on one side of the rotating shaft, and a hollow flow channel is provided inside the rotating shaft to form the rotating shaft flow channel together with the single input inlet pipe; A positioning groove is provided below the upper positioning self-lubricating bearing hole, and an anti-flying-out mechanism is provided in the positioning groove, including: A self-lubricating bearing is arranged in the valve stem mounting portion, and the lower end of the valve stem is arranged in the self-lubricating bearing; A skeleton oil seal is sleeved on the valve stem and arranged above the self-lubricating bearing; A plane bearing is sleeved on the valve stem and arranged below the upper positioning self-lubricating bearing hole.

2. The multi-way rotary valve according to claim 1, characterized in that: The valve cover comprises: A flange portion is provided on the top opening of the valve body and is detachably connected to the valve body via bolts; The valve cover flow channel portion is arranged on the lower end of the flange portion and extends into the inner cavity of the valve body. A plurality of the angle flow channels are arranged on the side of the valve cover flow channel portion; a sealing stuffing box and a valve stem hole are provided at the center of the top surface of the valve cover flow channel portion.

3. The multi-way rotary valve according to claim 2, characterized in that: Sealing rings are provided on the side surface of the valve cover flow channel portion and the inner side surface of the valve body.

4. The multi-way rotary valve according to claim 1, characterized in that: A pointer alignment indicating device is provided on the bracket.

5. The multi-way rotary valve according to claim 2, characterized in that: A sealing box is provided on the top surface of the valve cover, the upper positioning self-lubricating bearing hole is provided on the bottom surface of the sealing box, the valve stem is provided in the valve stem hole, and a sealing packing is provided between the valve stem hole and the side surface of the sealing box.

6. The multi-way rotary valve according to claim 3, characterized in that: The input port, the mixed output port and the single output port are all provided with flanges for connecting with pipelines.

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