Low shear control ball valve

Abstract

The application discloses a low shear force control ball valve, which comprises a left body, a right body, a valve body, a valve rod, a sealing ring, a flow control body and a ball arranged in the valve body; the left body and the right body are respectively arranged on the left side and the right side of the valve body, and the lower end of the valve rod is connected to the upper part of the ball after penetrating through the valve hole in the top of the valve body; the center of the left body, the right body and the ball is provided with a channel for fluid passing; the end of the left body is a fluid inlet, and the end of the right body is a fluid outlet; the end of the left body close to the valve body is provided with the sealing ring, and the end surface of the sealing ring is in abutment with the ball; the end of the right body close to the valve body is provided with the flow control body, and the inside of the flow control body is provided with a spiral channel. The application solves the problem that the shear force formed by the high-intensity turbulent flow area in the valve in the prior art can break, deform and emulsify the droplets in the multiphase flow, thereby causing the low efficiency of the downstream separation equipment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of valves, and particularly relates to a low-shear-force control ball valve. BACKGROUND

[0002] In the oil and gas exploitation and transportation system, there is a demand for improving the oil-water separation efficiency in the dehydration of produced materials and the treatment of oily sewage. For the gravity sedimentation and centrifugal separation type separation equipment in the system, the discrete phase droplet particle size is the most critical factor affecting the oil-water separation efficiency, and the shear force formed by the high-intensity turbulent flow region in the valve can cause the droplet breakage, deformation and emulsification in the multiphase flow, and the emulsification and droplet breakage of the discrete phase can reduce the efficiency of the downstream separation equipment. SUMMARY

[0003] The low-shear-force control ball valve provided by the application embodiment solves the problem that the shear force formed by the high-intensity turbulent flow region in the valve can cause the droplet breakage, deformation and emulsification in the multiphase flow, and further cause the low efficiency of the downstream separation equipment.

[0004] In order to achieve the above-mentioned purpose, the application embodiment provides a low-shear-force control ball valve, which comprises a left side body, a right side body, a valve body, a valve rod, a sealing ring, a flow control body and a ball body arranged in the valve body.

[0005] The left side body and the right side body are respectively arranged on the left side and the right side of the valve body, and the lower end of the valve rod is connected to the upper part of the ball body after penetrating through the valve hole in the top of the valve body.

[0006] The left side body, the right side body and the center of the ball body are provided with a channel for the fluid to pass through; the end of the left side body is a fluid inlet, and the end of the right side body is a fluid outlet.

[0007] The left side body is provided with the sealing ring at one end close to the valve body, and the end face of the sealing ring abuts against the ball body.

[0008] The right side body is provided with the flow control body at one end close to the valve body, and the inside of the flow control body is provided with a spiral channel.

[0009] In a possible implementation manner, the lower part of the valve body is provided with a fixed shaft, and the upper end of the fixed shaft extends into the blind hole in the lower part of the ball body.

[0010] In a possible implementation manner, the top of the valve body is provided with a driving device, and the power output end of the driving device is connected to the valve rod.

[0011] In a possible implementation, the flow control body comprises an inner spiral vortex chamber, the inner spiral vortex chamber is installed in a vortex chamber installation flow channel in the right side body, and an end of the inner spiral vortex chamber is arranged close to the ball;

[0012] The inner spiral vortex chamber comprises a central shaft and a plurality of inner spiral fins with the same structure.

[0013] The plurality of inner spiral fins are uniformly distributed in the circumferential direction of the central shaft, the inner spiral fins are arranged in a spiral shape on the side wall of the central shaft, and an inner spiral channel is formed between two adjacent inner spiral fins.

[0014] In a possible implementation, the flow control body further comprises an outer spiral vortex chamber.

[0015] The outer spiral vortex chamber comprises an annular shaft ring and a plurality of outer spiral fins with the same structure.

[0016] The plurality of outer spiral fins are uniformly distributed in the circumferential direction of the shaft ring, the outer spiral fins are arranged in a spiral shape on the outer side wall of the shaft ring, and an outer spiral channel is formed between two adjacent outer spiral fins.

[0017] The inner spiral vortex chamber is installed in the shaft ring, and the inner spiral channel and the outer spiral channel jointly form the spiral channel.

[0018] In a possible implementation, the inner spiral vortex chamber and the shaft ring are fixedly connected.

[0019] In a possible implementation, the inner spiral vortex chamber and the shaft ring are rotatably connected, one end of the shaft ring away from the ball is provided with a limiting ring, and an end of the inner spiral vortex chamber and a side wall of the limiting ring are in abutment.

[0020] In a possible implementation, the vortex chamber installation flow channel is sequentially provided with a converging flow channel, a diverging flow channel and a cylindrical flow channel away from one side of the ball.

[0021] In a possible implementation, a central angle corresponding to the outer spiral fin and the inner spiral fin is between 45 and 1080 degrees.

[0022] In a possible implementation, an outer diameter of the shaft ring is smaller than an inner diameter of the inner channel of the ball.

[0023] One or more technical solutions provided in the embodiments of the application have at least the following technical effects or advantages:

[0024] The low shear force control ball valve provided by the embodiment of the present application has the advantages that: when the low shear force control ball valve is in operation, the rotation of the ball in the ball valve is controlled by the valve rod to set an angle, so that the fluid with a set flow rate enters the ball valve from the fluid inlet of the ball valve and passes through the channel in the center of the ball; then the fluid enters the spiral channel of the flow control body, the spiral channel makes the fluid flow in a rotating manner and increases the flow rate of the fluid, the fluid forms a vortex, and the fluid continues to flow in a rotating manner after leaving the flow control body, in this process, the pressure difference in the flow control body is increased, that is, the energy dissipation rate in the flow control body is reduced, and then the shear force of the ball valve is reduced, and the formation of liquid droplet deformation and breakage is reduced; the flow control body completes medium separation and disturbance, and inhibits the formation of foam and emulsion, and at the same time, the shear force on the fluid is reduced, and the overall robustness of the separation system is improved; the shear force formed by the high-intensity turbulent flow area in the valve in the prior art can make the liquid droplets in the multiphase flow break, deform and emulsify, and then cause the problem of low efficiency of the downstream separation equipment.

[0025] The present application does not need to change the existing production and transportation process, and solves the problem of high shear force by adding a flow control body in the control ball valve, and realizes the purpose of fluid energy dissipation, so the present application is an ideal method for reducing shear force, which is economical, practical and feasible, avoids the problems of high cost and great difficulty in implementation in the prior art by heating, adding chemicals or increasing the residence time of the medium in the separator to reduce the shear force. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0027] Figure 1 The structure schematic diagram of the low shear force control ball valve provided by the embodiment of the present application is shown.

[0028] Figure 2 The internal structure schematic diagram of the low shear force control ball valve provided by the embodiment of the present application is shown.

[0029] Figure 3 The structure schematic diagram of the flow control body provided by the embodiment of the present application is shown.

[0030] Figure 4 The structure schematic diagram of the inner spiral vortex chamber provided by the embodiment of the present application is shown.

[0031] Figure 5 The structure schematic diagram of the outer spiral vortex chamber provided by the embodiment of the present application is shown.

[0032] Fig. 1 is a left body; Fig. 2 is a right body; Fig. 21 is a vortex chamber mounting flow channel; Fig. 22 is a converging flow channel; Fig. 23 is a diverging flow channel; Fig. 24 is a cylindrical flow channel; Fig. 3 is a valve body; Fig. 4 is a valve rod; Fig. 5 is a sealing ring; Fig. 6 is a flow control body; Fig. 61 is an inner spiral vortex chamber; Fig. 611 is a central shaft; Fig. 612 is an inner spiral fin; Fig. 613 is an inner spiral channel; Fig. 62 is an outer spiral vortex chamber; Fig. 621 is a shaft ring; Fig. 622 is an outer spiral fin; Fig. 623 is an outer spiral channel; Fig. 624 is a limiting ring; Fig. 7 is a ball; Fig. 8 is a fixed shaft; Fig. 9 is a driving device. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0035] As shown in Fig. 1, the low shear force control ball valve provided by the embodiments of the present application comprises a left body 1, a right body 2, a valve body 3, a valve rod 4, a sealing ring 5, a flow control body 6, and a ball 7 arranged in the valve body 3. Figures 1 to 5

[0036] The left body 1 and the right body 2 are respectively mounted on the left and right sides of the valve body 3, and the lower end of the valve rod 4 is connected to the upper part of the ball 7 after passing through the valve hole at the top of the valve body 3.

[0037] The centers of the left body 1, the right body 2, and the ball 7 are provided with channels for fluid to pass through. The end of the left body 1 is a fluid inlet, and the end of the right body 2 is a fluid outlet. ​

[0038] The left body 1 is provided with a sealing ring 5 near one end of the valve body 3, and the end face of the sealing ring 5 abuts against the ball 7.

[0039] The right body 2 is provided with a flow control body 6 near one end of the valve body 3, and the flow control body 6 is internally provided with a spiral channel.

[0040] It should be noted that rotating the valve rod 4 can rotate the ball 7, thereby realizing the opening and closing of the ball valve. The rotation angle of the ball 7 is different, and the flow rate of the fluid passing through the ball 7 is also different. The rotation angle of the ball 7 is 0°-90°. The flow control body 6 can be obtained by direct casting, 3D printing or milling. The fluid is a mixture of gas, oil and water.

[0041] When the ball valve is working, the ball 7 in the ball valve is rotated to set an angle by the valve rod 4, so that the fluid with a set flow rate enters the ball valve from the fluid inlet and passes through the channel in the center of the ball 7. Then the fluid enters the spiral channel of the flow control body 6. The spiral channel makes the fluid flow in a rotating manner and increases the flow rate of the fluid. The fluid forms a vortex and continues to flow in a rotating manner after leaving the flow control body 6. In this process, the pressure difference in the flow control body 6 is increased, that is, the energy dissipation rate in the flow control body 6 is reduced, thereby reducing the shear force of the ball valve and reducing the formation of liquid droplet deformation and rupture. The flow control body 6 completes medium separation and disturbance, suppresses the formation of foam and emulsion, reduces the shear force on the fluid, and improves the overall robustness of the separation system. The shear force formed by the high-intensity turbulent flow region in the valve in the prior art can cause the liquid droplets in the multiphase flow to rupture, deform and emulsify, thereby causing the problem of low efficiency of the downstream separation equipment.

[0042] The present application does not need to change the existing exploitation and transportation process. The problem of high shear force is solved by adding the flow control body 6 in the control ball valve, and the purpose of fluid energy dissipation is achieved. Therefore, the present application is the most economical, practical and feasible ideal method for reducing shear force, which avoids the problems of high cost and great difficulty in implementation in the prior art by heating, adding chemicals or increasing the residence time of the medium in the separator to reduce the shear force.

[0043] In this embodiment, the lower part of the valve body 3 is provided with a fixed shaft 8, and the upper end of the fixed shaft 8 extends into the blind hole in the lower part of the ball 7.

[0044] It should be noted that the fixed shaft 8 serves to fix the ball 7.

[0045] In this embodiment, the top of the valve body 3 is provided with a driving device 9, and the power output end of the driving device 9 is connected to the valve rod 4.

[0046] It should be noted that the staff can drive the valve stem 4 to rotate through the driving device 9, and the driving device 9 can be a hand wheel or a speed reducer motor.

[0047] In this embodiment, the flow control body 6 includes an inner spiral vortex chamber 61, which is installed in the vortex chamber installation flow channel 21 in the right side body 2, and the end of the inner spiral vortex chamber 61 is arranged close to the ball body 7.

[0048] The inner spiral vortex chamber 61 includes a central shaft 611 and a plurality of inner spiral fins 612 which are structurally identical.

[0049] The plurality of inner spiral fins 612 are uniformly distributed in the circumferential direction of the central shaft 611, and the inner spiral fins 612 are arranged in a spiral shape on the side wall of the central shaft 611, and the inner spiral channel 613 is formed between two adjacent inner spiral fins 612.

[0050] It should be noted that the inner spiral fins 612 arranged in a spiral shape can form the inner spiral channel 613, that is, the spiral channel, and the fluid flows in a rotating manner after entering the inner spiral channel 613, and the flow speed of the fluid is improved, and the fluid forms a vortex.

[0051] In this embodiment, the flow control body 6 further includes an outer spiral vortex chamber 62.

[0052] The outer spiral vortex chamber 62 includes an annular structure of a shaft ring 621 and a plurality of outer spiral fins 622 which are structurally identical.

[0053] The plurality of outer spiral fins 622 are uniformly distributed in the circumferential direction of the shaft ring 621, and the outer spiral fins 622 are arranged in a spiral shape on the outer side wall of the shaft ring 621, and the outer spiral channel 623 is formed between two adjacent outer spiral fins 622.

[0054] The inner spiral vortex chamber 61 is installed in the shaft ring 621, and the inner spiral channel 613 and the outer spiral channel 623 jointly form a spiral channel.

[0055] It should be noted that the inner spiral channel 613 and the outer spiral channel 623 enable the fluid of the mixed medium to be preliminarily separated before flowing in a rotating manner, that is, the high-density phase in the fluid of the mixed medium passes through the outer spiral channel 623, and the low-density phase in the fluid of the mixed medium passes through the inner spiral channel 613, thereby improving the subsequent separation efficiency. The flow control body 6 utilizes the cyclone flow to increase the flow energy dissipation.

[0056] When the fluid flows through the inner spiral channel 613 and the outer spiral channel 623, gas can be formed along the surfaces of the outer spiral fins 622 and the inner spiral fins 612 by partial flashing to separate the gas from the remaining part of the fluid.

[0057] If the fluid has a high speed, a large flow rate and / or a large viscosity, the fluid volume that can dissipate energy is increased. The fluid volume that can dissipate energy is increased by increasing the volume of the spiral channel.

[0058] The fluid volume that can dissipate energy is increased by increasing the cross-sectional area of the spiral channel. The fluid volume that can dissipate energy is increased by increasing the length of the spiral channel.

[0059] The length of the spiral channel is increased by increasing the angle between the inner spiral fin 612 and / or the outer spiral fin 622 and the center axis 611 of the output flow passage, and by increasing the length of the inner spiral fin 612 and / or the outer spiral fin 622. When the length of the spiral channel is increased by increasing the angle between the inner spiral fin 612 and / or the outer spiral fin 622 and the center axis 611 of the output flow passage, the central angle of the inner spiral fin 612 and / or the outer spiral fin 622 is not changed.

[0060] The cross-sectional area of the spiral channel is adjusted by adjusting the distance between two adjacent inner spiral fins 612 and / or outer spiral fins 622, and the height of the inner spiral fin 612 and / or the outer spiral fin 622.

[0061] In this embodiment, the inner spiral vortex chamber 61 and the collar 621 are fixedly connected.

[0062] It should be noted that the flow control body 6 is a one-piece structure, and the one-piece structure of the flow control body 6 has a simple manufacturing process.

[0063] In this embodiment, the inner spiral vortex chamber 61 and the collar 621 are rotatably connected, the end of the collar 621 away from the sphere 7 is provided with a limiting ring 624, and the end of the inner spiral vortex chamber 61 abuts against the side wall of the limiting ring 624.

[0064] It should be noted that the inner spiral vortex chamber 61 is rotatably installed in the collar 621, and the inner spiral vortex chamber 61 rotates in place under the action of the fluid, thereby providing a larger rotational flow field and centrifugal force, which is beneficial to the collection of liquid droplets and improves the subsequent separation efficiency.

[0065] When the fluid is in a low flow rate condition, the split type flow control body 6 has better separation effect.

[0066] In this embodiment, the vortex chamber installation flow passage 21 is provided with a tapered flow passage 22, a diverging flow passage 23 and a cylindrical flow passage 24 in sequence away from the sphere 7.

[0067] It should be noted that the tapered flow passage 22 increases the flow rate of the fluid and reduces the pressure of the fluid, thereby reducing the energy dissipation rate in the flow control body 6, and further reducing the shear force, thereby reducing the formation of liquid droplet deformation and rupture. The diverging flow passage 23 reduces the flow rate of the fluid to facilitate subsequent separation operation.

[0068] The presence of the converging channel 22 and the diverging channel 23 has a positive effect for increasing the flow resistance and achieving fluid energy dissipation.

[0069] In the embodiment, the central angle of the outer spiral fin 622 and the inner spiral fin 612 corresponds to 45-1080 degrees.

[0070] It should be noted that when the central angle of the outer spiral fin 622 and the inner spiral fin 612 corresponds to 180 degrees, the outer spiral fin 622 and the inner spiral fin 612 exactly wrap around the collar 621 and the central shaft 611, and therefore the central angle can clearly express the winding length of the outer spiral fin 622 and the inner spiral fin 612. The central angle of the outer spiral fin 622 and the inner spiral fin 612 corresponds to 45-1080 degrees, which can meet the needs of most uses.

[0071] In the embodiment, the outer diameter of the collar 621 is smaller than the inner diameter of the inner passage of the sphere 7.

[0072] It should be noted that the outer diameter of the collar 621 is smaller than the inner diameter of the inner passage of the sphere 7, so that the fluid in the passage of the sphere 7 can enter the outer spiral passage 623.

[0073] In the embodiment, it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A low shear control ball valve, characterized by: It comprises a left side body (1), a right side body (2), a valve body (3), a valve stem (4), a sealing ring (5), a flow control body (6), and a ball (7) disposed in the valve body (3); The left side body (1) and the right side body (2) are respectively mounted on the left and right sides of the valve body (3); the lower end of the valve stem (4) passes through the valve hole at the top of the valve body (3) and is connected to the upper part of the ball (7); The left side body (1), the right side body (2), and the center of the sphere (7) are provided with a channel for fluid to pass through; the end of the left side body (1) is a fluid inlet, and the end of the right side body (2) is a fluid outlet; The sealing ring (5) is provided at one end of the left side body (1) close to the valve body (3), and the end surface of the sealing ring (5) abuts against the ball (7); The flow control body (6) is provided at one end of the right side body (2) close to the valve body (3), and a spiral channel is provided inside the flow control body (6); The flow control body (6) includes an inner spiral vortex chamber (61), the inner spiral vortex chamber (61) is installed in the vortex chamber installation flow channel (21) in the right body (2), and the end of the inner spiral vortex chamber (61) is arranged close to the sphere (7); The inner spiral vortex chamber (61) comprises a central axis (611) and a plurality of inner spiral fins (612) having the same structure; The plurality of inner spiral fins (612) are evenly distributed in the circumferential direction of the central axis (611); the inner spiral fins (612) are arranged in a spiral shape on the side wall of the central axis (611); an inner spiral channel (613) is formed between two adjacent inner spiral fins (612); The flow control body (6) further includes an outer spiral vortex chamber (62); The outer spiral vortex chamber (62) comprises a shaft ring (621) of an annular structure, and a plurality of outer spiral fins (622) of the same structure; The plurality of outer spiral fins (622) are evenly distributed in the circumference of the shaft ring (621), and the outer spiral fins (622) are spirally arranged on the outer side wall of the shaft ring (621), and an outer spiral channel (623) is formed between two adjacent outer spiral fins (622); The inner spiral vortex chamber (61) is installed in the shaft ring (621), and the inner spiral channel (613) and the outer spiral channel (623) together form the spiral channel.

2. The low shear control ball valve according to claim 1, characterized in that: A fixed shaft (8) is provided at the lower portion of the valve body (3), and the upper end of the fixed shaft (8) extends into the blind hole at the lower portion of the sphere (7).

3. The low shear control ball valve according to claim 1, characterized in that: A driving device (9) is installed on the top of the valve body (3), and a power output end of the driving device (9) is connected to the valve stem (4).

4. The low shear control ball valve according to claim 1, characterized in that: The inner spiral vortex chamber (61) and the shaft collar (621) are fixedly connected.

5. The low shear control ball valve according to claim 1, characterized in that: The inner spiral vortex chamber (61) and the shaft ring (621) are rotatably connected, and a limiting ring (624) is provided at one end of the shaft ring (621) away from the sphere (7), and the end of the inner spiral vortex chamber (61) abuts against the side wall of the limiting ring (624).

6. The low shear control ball valve according to claim 1, characterized in that: A side of the vortex chamber installation flow channel (21) away from the sphere (7) is provided with a gradually contracting flow channel (22), a gradually expanding flow channel (23) and a cylindrical flow channel (24) in sequence.

7. The low shear control ball valve according to claim 1, characterized in that: The central angles of the outer spiral fins (622) and the inner spiral fins (612) are between 45 and 1080 degrees.

8. The low shear control ball valve according to claim 1, characterized in that: The outer diameter of the collar (621) is smaller than the inner diameter of the channel inside the sphere (7).

Images