A dual-channel cage-type underwater throttle valve

Abstract

The present invention relates to a dual-channel cage-type underwater throttle valve, comprising an upper valve cover, a middle valve body, a valve body and a lower valve cover, wherein two upper valve cavities are arranged inside the middle valve body; two connected lower valve cavities are arranged in the valve body; a driving cam, a motor, a baffle and a spring are respectively arranged in the two upper valve cavities, and the motor is connected to the driving cam; the baffle is arranged below the driving cam; the spring is arranged between the baffle and the bottom surface of the upper valve cavity; a valve stem, a valve core, a cage sleeve, a valve core fixer and a valve seat are respectively arranged in the two lower valve cavities, the valve stem is slidably arranged in the lower valve cavity, the top of the valve stem extends into the upper valve cavity and is sleeved in the spring; the top of the valve stem is connected to the baffle; the valve core is arranged in the upper part of the lower valve cavity and is sleeved on the outside of the valve stem; the cage sleeve is sleeved on the outside of the valve core; throttling holes are respectively provided on the side walls of the valve core and the cage sleeve; it can reduce the oil and gas velocity, reduce the impact of high-speed fluid on the valve core wall, reduce vibration and noise caused by the impact, and improve the service life of the throttle valve.

Description

Technical Field

[0001] The invention belongs to the technical field of throttle valves, and in particular relates to a double-channel cage-type underwater throttle valve. Background Art

[0002] As a crucial component of underwater production systems, subsea choke valves regulate the flow and speed of production units and control the commissioning and shut-in of oil and gas wells. Due to their harsh operating environment, high pressure, and rapid fluid velocity, subsea choke valves are susceptible to damage from vibration, noise, and erosion.

[0003] During offshore oil production, throttle valves are connected to underwater Christmas trees to control oil and gas production. Due to the high speed of oil and gas delivery, the throttle valves can easily become unstable, noisy, and have poor erosion resistance, which in turn shortens their service life.

[0004] The throttle valve structures in the prior art are different. The publicly disclosed name is an inner cage-type throttle valve for blocking flow. The throttle valve has high-speed fluid directly in contact with the valve core, and the valve core is not protected by an outer protective cover, resulting in insufficient erosion life of the valve core; the publicly disclosed name is a cage-type throttle valve. The valve stem assembly of the throttle valve is a slender rod structure. When the throttle valve is in the closed state, the valve stem assembly is subjected to the fluid pressure and the force of other components of the throttle valve, and is prone to bending and torsional deformation, and the throttle valve stem is prone to failure. Summary of the Invention

[0005] In response to at least one of the problems in the above-mentioned prior art, the purpose of the present invention is to provide a dual-channel cage-type underwater throttle valve, in which two channels are arranged in the valve body, which can reduce the oil and gas velocity and reduce the impact of high-speed fluid on the valve core wall, thereby reducing the vibration and noise caused by the impact and increasing the service life of the throttle valve.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A dual-channel cage-type underwater throttle valve, comprising:

[0008] Upper valve cover;

[0009] The middle valve body has two upper valve chambers arranged therein; the upper valve cover is connected to the top of the middle valve body;

[0010] A valve body is connected to the bottom of the middle valve body; a lower valve cavity is provided inside the valve body, and the two upper valve cavities are respectively connected to the lower valve cavity; a fluid inlet is provided in the valve body, and the fluid inlet is connected to the lower valve cavity;

[0011] A lower valve cover is connected to the bottom of the valve body; the lower valve cover defines a fluid outlet, and both lower valve chambers are connected to the fluid outlet;

[0012] The two upper valve cavities are respectively provided with:

[0013] Drive cam;

[0014] a motor connected to the driving cam;

[0015] a baffle, disposed below the driving cam;

[0016] a spring, disposed between the baffle and the bottom surface of the upper valve chamber;

[0017] The two lower valve chambers are respectively provided with:

[0018] a valve stem slidably disposed in the lower valve cavity, with its top extending into the upper valve cavity and sleeved in the spring; the top of the valve stem is connected to the baffle;

[0019] A valve core is arranged at the upper portion of the lower valve cavity and sleeved on the outside of the valve stem;

[0020] A cage jacket is sleeved on the outside of the valve core; the side walls of the valve core and the cage jacket are respectively provided with throttling holes;

[0021] A valve core holder is provided below the valve core and is used to fix and support the valve core;

[0022] The valve seat is arranged below the cage jacket and sleeved on the outside of the valve core holder.

[0023] Preferably, a sealing gasket is installed between the upper valve cover and the middle valve body.

[0024] Preferably, the upper valve cover is connected to the middle valve body by bolts.

[0025] Preferably, a first sealing gasket is installed between the middle valve body and the valve body, and a second sealing gasket is installed between the lower valve cover and the valve body.

[0026] Preferably, the lower valve cover is connected to the valve body by bolts.

[0027] Preferably, the driving cam is in contact with the baffle.

[0028] Preferably, the inner diameter of the upper portion of the upper valve cavity is larger than the inner diameter of the lower portion, and the spring is arranged in the upper portion of the upper valve cavity.

[0029] Preferably, an outer wall of the valve core holder is provided with an external thread, an inner wall of the valve seat is provided with an internal thread, and the valve seat is screwed onto the outside of the valve core holder.

[0030] Preferably, the valve core is sleeved in the cage jacket with interference fit, and the throttle hole of the valve core and the throttle hole of the cage jacket are coaxial.

[0031] Preferably, a through hole is provided on the side wall of the upper valve cavity, and the cable of the motor passes through the through hole.

[0032] The present invention has the following advantages due to the adoption of the above technical solution:

[0033] 1. The dual-channel cage-type underwater throttle valve provided by the present invention addresses the problem that the spool of the throttle valve in the prior art is easily damaged by erosion of gravel in the oil and gas. The throttle valve throttles by arranging two valve cores in parallel in the same valve cavity. Compared with the single-cavity throttle valve, the dual-channel throttle valve is provided with two channels in the valve body, which changes the flow field distribution and the movement trajectory of the particles of the original single-channel throttle valve, can reduce the oil and gas velocity, and reduce the collision velocity of the particles on the valve core wall when entering the throttle valve, so that the oil and gas passing through the valve core per unit time is reduced, and the impact of high-speed fluid on the valve core wall is reduced, thereby reducing the vibration and noise caused by the impact, improving the erosion resistance of the valve core, increasing the erosion life of the throttle valve, and improving the service life of the throttle valve.

[0034] 2. The dual-channel cage-type underwater throttle valve provided by the present invention has two valve cores arranged in parallel, which increases the effective working area of ​​the valve core. By changing the flow field distribution through the multi-valve core structure, the flow regulation capacity of the throttle valve can be increased; its dual valve cores can be opened or closed separately, improving the throttling working ability of the throttle valve, increasing the flow rate of the throttle valve, and solving the fundamental problem of valve core erosion when underwater throttle valves transport large flows of sand-containing media. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a dual-channel cage-type underwater throttle valve provided in Example 1 of the present invention.

[0036] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0037] Figure 3 It is a schematic diagram of the valve core structure of the dual-channel cage-type underwater throttle valve provided in Example 1 of the present invention.

[0038] Figure 4 It is a structural schematic diagram of the valve stem of the dual-channel cage-type underwater throttle valve provided in Example 1 of the present invention.

[0039] Figure 5 It is a structural schematic diagram of the middle valve body of the dual-channel cage-type underwater throttle valve provided in Example 1 of the present invention.

[0040] Figure 6 It is a structural schematic diagram of the valve body of the dual-channel cage-type underwater throttle valve provided in Example 1 of the present invention.

[0041] Figure 7It is a structural schematic diagram of the lower valve cover of the dual-channel cage-type underwater throttle valve provided in Example 1 of the present invention.

[0042] In the accompanying drawings:

[0043] 101 is the fluid inlet, 102 is the fluid outlet, 1, valve cover, 2, sealing gasket, 3, driving cam, 4, middle valve body, 401 is the upper valve chamber, 5, baffle, 6, first sealing gasket, 7, spring, 8, valve stem, 9, valve core, 901, throttle hole, 10, valve body, 11, cage sleeve, 110 is the lower valve chamber, 12, second sealing gasket, 13, lower valve cover, 14, valve core retainer, 15, valve seat, 16, sealing ring. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "backward", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The direction of the arrows in the figures represents the direction of liquid flow.

[0046] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "assembly," "disposition," and "connection" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0047] The present invention provides a dual-channel cage-type underwater throttle valve. By arranging two channels in the valve body, the oil and gas velocity can be reduced, the impact of high-speed fluid on the valve core wall can be reduced, and the vibration and noise caused by the impact can be reduced, thereby increasing the service life of the throttle valve.

[0048] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0049] Example

[0050] Please refer to Figures 1 to 7 The dual-channel cage-type underwater throttle valve provided in this embodiment includes an upper valve cover 1, a middle valve body 4, a valve body 10 and a lower valve cover 13. Two upper valve chambers 401 are provided inside the middle valve body 4; the upper valve cover 1 is connected to the top of the middle valve body 4; the valve body 10 is connected to the bottom of the middle valve body 4; a lower valve chamber 110 is provided inside the valve body 10, and the two upper valve chambers 401 are respectively connected to the lower valve chambers 110; the valve body 10 defines a fluid inlet 101, which is connected to the lower valve chamber 110; the lower valve cover 13 is connected to the bottom of the valve body 10; the lower valve cover 13 defines a fluid outlet 102, and the two lower valve chambers 110 are both connected to the fluid outlet 102;

[0051] The two upper valve chambers 401 are respectively provided with a driving cam 3, a motor, a baffle 5 and a spring 7. The motor is connected to the driving cam 3; the baffle 5 is arranged below the driving cam 3; and the spring 7 is arranged between the baffle 5 and the bottom surface of the upper valve chamber 401.

[0052] The two lower valve chambers 110 are respectively provided with a valve stem 8, a valve core 9, a cage sleeve 11, a valve core holder 14 and a valve seat 15. The valve stem 8 is slidably set in the lower valve chamber 110, and its top extends into the upper valve chamber 401 and is sleeved in the spring 7; the top of the valve stem 8 is connected to the baffle 5; the valve core 9 is set in the upper part of the lower valve chamber 110 and is sleeved on the outside of the valve stem 8; the cage sleeve 11 is sleeved on the outside of the valve core 9; the side walls of the valve core 9 and the cage sleeve 11 are respectively provided with throttling holes 801; the valve core holder 14 is set under the valve core 9 to fix and support the valve core 9; the valve seat 15 is set under the cage sleeve 11 and is sleeved on the outside of the valve core holder 14.

[0053] The dual-channel, caged underwater throttle valve provided in this embodiment utilizes two parallel valve cores 9 for throttling. Oil and gas enter through the fluid inlet 101 and exit through the fluid outlet 102. The fluid inlet 101 can be located on the left sidewall of the valve body 10, and the fluid outlet 102 can be located on the bottom surface of the lower valve cover 13. The two upper valve chambers 401 and the two lower valve chambers 110 are connected vertically and interconnected to form a valve chamber. A servo motor can be used as the motor. During operation, the throttle valve rotates the drive cam 3, which contacts and presses the baffle 5 downward, thereby regulating the downward movement of the valve stem 7 and closing the throttle orifice 801. As the drive cam 3 continues to rotate, the spring 7 drives the valve stem 8 upward, and the throttle valve begins to operate. The two valve cores 9 of the throttle valve can be opened fully or individually depending on the flow rate. That is, the two valve cores 8 can operate independently or in conjunction.

[0054] in, Figure 1The arrows in the figure indicate the direction of fluid flow. By providing two channels in the valve body 10, the oil and gas velocity can be reduced, and the impact of the high-speed fluid on the wall of the valve core 9 can be reduced, thereby reducing the vibration and noise caused by the impact and improving the service life of the throttle valve.

[0055] Please refer to Figure 1 In some embodiments, a sealing gasket 2 is installed between the upper valve cover 1 and the middle valve body 4. The sealing gasket 2 can be an O-ring, which can be combined with the upper valve cover 1 and tightened with the middle valve body 4 through bolts, so that the O-ring is deformed, isolating the fluid inside and outside the valve cavity, and achieving reliable sealing.

[0056] In some embodiments, a first sealing gasket 6 is installed between the middle valve body 4 and the valve body 10, and a second sealing gasket 12 is installed between the lower valve cover 13 and the valve body 10. The lower valve cover 13 can be connected to the valve body 10 through bolts, so that the O-ring is deformed, isolating the fluid inside and outside the valve cavity, and achieving reliable sealing.

[0057] In some embodiments, the driving cam 3 is in contact with the baffle 5 .

[0058] Please refer to Figure 1 and Figure 4 In some embodiments, the upper inner diameter of the upper valve cavity 401 is larger than the lower inner diameter, and the spring 7 is placed in the upper portion of the upper valve cavity 401. That is, the vertical cross-section of the upper valve cavity 401 can be set to an inverted convex shape.

[0059] Specifically, the vertical cross-section of the valve stem 7 is also convex, that is, the upper outer diameter of the valve stem 7 is smaller than the lower outer diameter, the upper part of the valve stem 7 is arranged in the upper valve cavity 401, and the lower part is arranged in the lower valve cavity 110.

[0060] Please refer to Figure 1 and Figure 2 In some embodiments, an outer wall of the valve core holder 14 is provided with an external thread, an inner wall of the valve seat 15 is provided with an internal thread, and the valve seat 15 is screwed onto the outside of the valve core holder 14 .

[0061] A sealing ring 16 is provided between the valve seat 15 and the valve body 10 .

[0062] Please refer to Figure 1 and Figure 3 In some embodiments, the valve core 9 is sleeved in the cage jacket 11 with an interference fit, and the throttle holes 801 of the valve core 9 and the cage jacket 11 are arranged to be coaxial.

[0063] In some embodiments, a through hole is formed in the side wall of the upper valve chamber 401 , and the cable of the motor passes through the through hole.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A dual-channel cage-type underwater throttle valve, characterized in that: include: Upper valve cover (1); A middle valve body (4) is provided with two upper valve chambers (401) therein; the upper valve cover (1) is connected to the top of the middle valve body (4); The valve body (10) is connected to the bottom of the middle valve body (4); a lower valve cavity (110) is provided inside the valve body (10), and the two upper valve cavities (401) are respectively connected to the lower valve cavity (110); the valve body (10) is provided with a fluid inlet (101), and the fluid inlet (101) is connected to the lower valve cavity (110); A lower valve cover (13) is connected to the bottom of the valve body (10); the lower valve cover (13) is provided with a fluid outlet (102), and both lower valve chambers (110) are connected to the fluid outlet (102); The two upper valve chambers (401) are respectively provided with: Driving cam (3); a motor connected to the driving cam (3); A baffle (5) is arranged below the driving cam (3); a spring (7) disposed between the baffle (5) and the bottom surface of the upper valve chamber (401); The two lower valve chambers (110) are respectively provided with: A valve stem (8) is slidably disposed in the lower valve chamber (110), with its top extending into the upper valve chamber (401) and sleeved in the spring (7); the top of the valve stem (8) is connected to the baffle (5); A valve core (9) is arranged at the upper portion of the lower valve chamber (110) and sleeved on the outside of the valve stem (8); A cage jacket (11) is sleeved on the outside of the valve core (9); throttle holes (901) are respectively provided on the side walls of the valve core (9) and the cage jacket (11); A valve core holder (14) is provided below the valve core (9) and is used to fix and support the valve core (9); The valve seat (15) is arranged below the cage jacket (11) and is sleeved on the outside of the valve core holder (14).

2. The dual-channel cage-type underwater throttle valve according to claim 1, characterized in that: A sealing gasket (2) is installed between the upper valve cover (1) and the middle valve body (4).

3. The dual-channel cage-type underwater throttle valve according to claim 1, characterized in that: The upper valve cover (1) is connected to the middle valve body (4) via bolts.

4. The dual-channel cage-type underwater throttle valve according to claim 1, characterized in that: A first sealing gasket (6) is installed between the middle valve body (4) and the valve body (10), and a second sealing gasket (12) is installed between the lower valve cover (13) and the valve body (10).

5. The dual-channel cage-type underwater throttle valve according to claim 1, characterized in that: The lower valve cover (13) is connected to the valve body (10) via bolts.

6. The dual-channel cage-type underwater throttle valve according to claim 1, characterized in that: The driving cam (3) is in contact with the baffle (5).

7. The dual-channel cage-type underwater throttle valve according to claim 1, characterized in that: The inner diameter of the upper portion of the upper valve cavity (401) is larger than the inner diameter of the lower portion, and the spring (7) is arranged in the upper portion of the upper valve cavity (401).

8. The dual-channel cage-type underwater throttle valve according to claim 1, characterized in that: The outer wall of the valve core holder (14) is provided with an external thread, the inner wall of the valve seat (15) is provided with an internal thread, and the valve seat (15) is screwed onto the outside of the valve core holder (14).

9. The dual-channel cage-type underwater throttle valve according to claim 1, characterized in that: The valve core (9) is sleeved in the cage sleeve (11) with an interference fit, and the throttle hole (901) of the valve core (9) and the throttle hole (901) of the cage sleeve (11) are arranged coaxially.

10. The dual-channel cage-type underwater throttle valve according to any one of claims 1 to 9, characterized in that: A through hole is provided on the side wall of the upper valve chamber (401), and the cable of the motor passes through the through hole.

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