Double-channel cage type underwater throttle valve

Abstract

The double-channel cage type underwater throttle valve comprises an upper valve deck, a middle valve body, a valve body and a lower valve deck, and two upper valve cavities are formed in the middle valve body; two lower valve cavities which are communicated with each other are arranged in the valve body; driving cams, motors, baffles and springs are arranged in the two upper valve cavities respectively, and the motors are connected with the driving cams; 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 rod, a valve element, a cage jacket, a valve element fixator and a valve seat are arranged in each lower valve cavity, the valve rods are arranged in the lower valve cavities in a sliding mode, and the tops of the valve rods extend into the upper valve cavities and are arranged in springs in a sleeved mode. The top of the valve rod is connected with the baffle; the valve element is arranged on the upper portion in the lower valve cavity and arranged outside the valve rod in a sleeving mode. The cage jacket is sleeved outside the valve core; throttling holes are respectively formed in the side walls of the valve core and the cage jacket; the throttling valve can reduce oil gas speed, reduce impact of high-speed fluid on the wall face of the valve element, reduce vibration and noise caused by impact and prolong the service life of the throttling 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 an important part of the underwater production system, the underwater throttle valve is used to adjust the flow and speed of the production unit and control the commissioning and shutdown of oil and gas wells. Its working environment is harsh, the working pressure is high, and the fluid speed is fast. The underwater throttle valve is prone to vibration and noise erosion damage.

[0003] In the process of offshore oil production, the throttle valve is connected to the underwater Christmas tree to control the offshore oil and gas production. Due to the high speed of oil and gas transmission, the throttle valve is prone to throttling instability, loud noise, and poor anti-erosion performance, which in turn affects the service life of the throttle valve.

[0004] The throttle valve structures in the prior art are different. One publicly disclosed is an inner cage-type throttle valve for blocking flow. In the throttle valve, high-speed fluid is in direct 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; another publicly disclosed 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 a 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 object 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: A dual-channel cage-type underwater throttle valve, comprising: Upper valve cover; The middle valve body has two upper valve chambers disposed therein; the upper valve cover is connected to the top of the middle valve body; A valve body is connected to the bottom of the middle valve body; a lower valve cavity is arranged 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; A lower valve cover is connected to the bottom of the valve body; the lower valve cover is provided with a fluid outlet, and the two lower valve chambers are connected to the fluid outlet; The two upper valve chambers are respectively provided with: Driving cam; A motor connected to the driving cam; A baffle plate is arranged below the driving cam; A spring, disposed between the baffle and the bottom surface of the upper valve chamber; The two lower valve chambers are respectively provided with: A valve stem is 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; A valve core is arranged at the upper part of the lower valve cavity and sleeved on the outside of the valve stem; 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; A valve core fixer is arranged below the valve core and is used to fix and support the valve core; The valve seat is arranged under the cage sleeve and sleeved on the outside of the valve core holder.

[0007] Preferably, a sealing gasket is installed between the upper valve cover and the middle valve body.

[0008] Preferably, the upper valve cover is connected to the middle valve body by bolts.

[0009] 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.

[0010] Preferably, the lower valve cover is connected to the valve body by bolts.

[0011] Preferably, the driving cam is in contact with the baffle.

[0012] 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.

[0013] 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 threadedly connected to the outside of the valve core holder.

[0014] 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 arranged coaxially.

[0015] Preferably, a through hole is formed on the side wall of the upper valve cavity, and a cable of the motor passes through the through hole.

[0016] The present invention adopts the above technical solution, which has the following advantages: 1. The dual-channel cage-type underwater throttle valve provided by the present invention aims at solving the problem that the valve core of the throttle valve in the prior art is easily damaged by erosion of gravel in 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 particles of the original single-channel throttle valve, can reduce the speed of oil and gas, and reduce the collision speed of particles on the wall of the valve core 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 wall of the valve core 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 increasing the service life of the throttle valve.

[0017] 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. The flow field distribution is changed by the multi-valve core structure, which can increase the flow regulation ability of the throttle valve; its dual valve cores can be opened or closed separately, which improves the throttling working ability of the throttle valve, increases the flow rate of the throttle valve, and solves the fundamental problem of valve core erosion when underwater throttle valves transport large flows of sand-containing media. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a dual-channel cage-type underwater throttle valve provided in Example 1 of the present invention.

[0019] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Figure 7 It 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.

[0025] Markings in the accompanying drawings: 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 cavity, 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 cavity, 12, second sealing gasket, 13, lower valve cover, 14, valve core fixer, 15, valve seat, 16, sealing ring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The direction of the arrow in the figure represents the direction of liquid flow.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "assembly", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The present invention provides a dual-channel cage-type underwater throttle valve, which can reduce the oil and gas speed and the impact of high-speed fluid on the valve core wall by arranging two channels in the valve body, thereby reducing the vibration and noise caused by the impact and prolonging the service life of the throttle valve.

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example Please refer to Figures 1 to 7The double-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 arranged 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 arranged inside the valve body 10, and the two upper valve chambers 401 are respectively connected to the lower valve chamber 110; the valve body 10 is provided with a fluid inlet 101, and the fluid inlet 101 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 is provided with a fluid outlet 102, and the two lower valve chambers 110 are connected to the fluid outlet 102; The two upper valve chambers 401 are respectively provided with a driving cam 3, a motor, a baffle 5 and a spring 7, wherein 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; 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 fixer 14 and a valve seat 15. The valve stem 8 is slidably arranged 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 arranged at 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 fixer 14 is arranged below the valve core 9 to fix and support the valve core 9; the valve seat 15 is arranged below the cage sleeve 11 and is sleeved on the outside of the valve core fixer 14.

[0032] The double-channel cage-type underwater throttle valve provided in this embodiment is throttled by two parallel valve cores 9, and oil and gas enter from the fluid inlet 101 and flow out from the fluid outlet 102. The fluid inlet 101 can be opened on the left side wall of the valve body 10, and the fluid outlet 102 can be opened 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 up and down respectively and connected to each other to form a valve chamber. The motor can be a servo motor. When working, the throttle valve drives the driving cam 3 to rotate through the motor, and the driving cam 3 contacts the baffle 5 and presses the baffle 5 downward, thereby adjusting the valve stem 7 to move downward and close the throttle hole 801; as the driving cam 3 continues to rotate, the spring 7 drives the valve stem 8 upward, and the throttle valve starts to work. The two valve cores 9 of the throttle valve can be fully opened or opened separately according to the flow rate, that is, the two valve cores 8 can work independently or jointly.

[0033] in, Figure 1 The arrow in the figure shows the direction of fluid flow. By setting two channels in the valve body 10, the oil and gas speed can be reduced, the impact of high-speed fluid on the wall of the valve core 9 can be reduced, and the vibration and noise caused by the impact can be reduced, thereby increasing the service life of the throttle valve.

[0034] 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 to isolate the fluid inside and outside the valve cavity and achieve reliable sealing.

[0035] 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 by bolts, so that the O-ring is deformed to isolate the fluid inside and outside the valve cavity and achieve reliable sealing.

[0036] In some embodiments, the driving cam 3 is in contact with the baffle 5 .

[0037] 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.

[0038] 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.

[0039] 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 threadedly connected to the outside of the valve core holder 14 .

[0040] A sealing ring 16 is arranged between the valve seat 15 and the valve body 10 .

[0041] Please refer to Figure 1 and Figure 3 In some embodiments, the valve core 9 is sleeved in the cage jacket 11 with interference fit, and the throttle holes 801 of the valve core 9 and the cage jacket 11 are arranged to be coaxial.

[0042] 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.

[0043] 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 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) inside; 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 arranged inside the valve body (10), and the two upper valve chambers (401) are respectively connected to the lower valve chamber (110); the valve body (10) is provided with a fluid inlet (101), and the fluid inlet (101) is connected to the lower valve chamber (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 the two lower valve chambers (110) are both 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) disposed 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) 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); throttling holes (901) are respectively provided on the side walls of the valve core (9) and the cage jacket (11); A valve core fixer (14) is arranged 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 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 chamber (401) is greater than the inner diameter of the lower portion, and the spring (7) is arranged in the upper portion of the upper valve chamber (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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