Linear regulating valve with metering function

Abstract

The utility model relates to a linear regulating valve with a metering function. The linear regulating valve comprises a valve body with a cavity; the cage sleeve assembly is arranged in the cavity, the cage sleeve assembly at least comprises an inner sleeve layer, a middle sleeve layer and an outer sleeve layer which are sequentially arranged from inside to outside in a sleeving mode, and the inner sleeve layer, the middle sleeve layer and the outer sleeve layer are provided with a first through hole, a second through hole and a third through hole respectively; the valve rod is movably arranged on the inner side of the inner sleeve layer, and the valve rod can block the first through hole; the pressure difference detection element is used for collecting pressure difference data between the upstream and the downstream of the cage sleeve assembly; the pressure detection element and the temperature detection element are used for collecting pressure data and temperature data of fluid flowing through the inlet; and the position of the valve rod is adjusted according to the pressure difference data, the pressure data and the temperature data so as to control the opening degree of the first through hole. The regulating valve solves the technical problems that the regulating valve does not have a flow metering function and is poor in pressure regulating effect.

Description

Technical Field

[0001] The utility model relates to the field of valve structures, in particular to a linear regulating valve with a metering function. Background Art

[0002] At present, the function of the regulating valve is mainly to regulate pressure, and it does not have the flow metering function. The valve core structure of the regulating valve is divided into needle core type and cage type. Although the needle core type regulating valve has a simple structure, it has the problem of inaccurate pressure regulation; cage type regulating valves are mostly based on a single-layer cage structure, and a throttle hole is designed on the cage to achieve the regulation function; there are also multi-layer cage structures, and holes are punched along the circumference of the multi-layer cage, and the valve pressure regulation function is achieved through multi-stage throttling and pressure reduction. Since the throttle hole on the cage is circular, it only has fluid permeability and does not have the function of linear regulation. As the throttle hole opening increases, the flow area will increase exponentially, so the pressure regulation effect is poor.

[0003] In the related technology, the existing regulating valves do not have the flow metering function and the pressure regulation effect is poor, and no effective solution has been given so far.

[0004] Therefore, the inventors, relying on their many years of experience and practice in related industries, have proposed a linear regulating valve with a metering function to overcome the defects of the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a linear regulating valve with metering function, which has the functions of fine pressure regulation and accurate flow metering. The valve body adopts a multi-stage cage structure and has the function of linearly adjusting the flow area, especially having a more significant effect in the regulation of high-pressure wells.

[0006] The purpose of this utility model can be achieved by adopting the following scheme:

[0007] The utility model provides a linear regulating valve with a metering function, the linear regulating valve with a metering function comprising:

[0008] a valve body, wherein a chamber is formed in the valve body, and the valve body has an inlet and an outlet respectively communicated with the chamber;

[0009] a cage assembly disposed in the chamber, the cage assembly comprising at least an inner jacket layer, a middle jacket layer, and an outer jacket layer sequentially sleeved from the inside out, the inner jacket layer, the middle jacket layer, and the outer jacket layer respectively having a first through hole, a second through hole, and a third through hole through which fluid flows, the inlet of the valve body being in communication with an annulus located in the chamber and on the periphery of the cage assembly, and the outlet of the valve body being in communication with the inner side of the inner jacket layer;

[0010] a valve stem, wherein the valve stem is movably disposed inside the inner sleeve, and an outer wall of the valve stem is in close contact with an inner wall of the inner sleeve and can seal the first through hole;

[0011] a pressure differential detection element, the pressure differential detection element being disposed between the chamber and the outlet, and being used to collect pressure differential data between an upstream portion of the cage assembly and a downstream portion thereof;

[0012] a pressure detection element and a temperature detection element, the pressure detection element and the temperature detection element being disposed at the inlet and respectively used to collect pressure data and temperature data of the fluid flowing through the inlet;

[0013] The position of the valve stem is adjusted according to the pressure difference data, the pressure data and the temperature data to control the opening of the first through hole.

[0014] In a preferred embodiment of the present invention, the linear regulating valve with metering function further comprises a first connector having a first flow channel;

[0015] The inlet is located on the side wall of the valve body, the first joint is connected to the side wall of the valve body, and the first flow channel is communicated with the inlet;

[0016] The pressure detection element and the temperature detection element are respectively arranged on the first joint.

[0017] In a preferred embodiment of the present invention, the linear regulating valve with metering function further includes a second connector, and the second connector has a second flow channel;

[0018] The outlet is located on the bottom wall of the valve body, the second connector is connected to the bottom wall of the valve body, and the second flow channel is in communication with the outlet;

[0019] A pressure measuring pipeline is provided between the second joint and the valve body, with two ends of the pressure measuring pipeline connected to the second joint and the valve body respectively, and the pressure measuring pipeline is communicated with the chamber and the second flow channel respectively;

[0020] The differential pressure detection element is arranged on the pressure measuring pipeline, or at a position where the pressure measuring pipeline is connected to the second joint, or at a position where the pressure measuring pipeline is connected to the valve body.

[0021] In a preferred embodiment of the present invention, the first through hole is a vertically arranged strip-shaped through hole, and along the circumference of the inner sleeve, the width of the first through hole is less than or equal to 5 mm;

[0022] There are multiple first through holes, and the multiple first through holes are arranged at intervals along the circumference of the inner sleeve layer.

[0023] In a preferred embodiment of the present invention, the second through hole is a circular through hole, and a first angle is formed between the central axis of the second through hole and a radial line connecting the center point of the second through hole and the central axis of the middle jacket layer, and the first angle is an acute angle;

[0024] There are multiple second through holes, and the multiple second through holes are arranged in an array on the middle jacket layer.

[0025] In a preferred embodiment of the present invention, the third through hole is a circular through hole, and a second angle is formed between the central axis of the third through hole and a radial line connecting the center point of the third through hole and the central axis of the outer shell layer, and the second angle is an acute angle;

[0026] There are multiple third through holes, and the multiple third through holes are arranged in an array on the outer shell layer.

[0027] In a preferred embodiment of the present invention, in the circumferential direction of the cage assembly, the first through hole, the second through hole and the third through hole are staggered.

[0028] In a preferred embodiment of the present invention, the cage assembly further comprises an annular cage frame seat and an annular cage frame cover, the bottom of the inner layer, the bottom of the middle layer and the bottom of the outer layer are respectively connected to the top of the cage frame seat, and the top of the inner layer, the top of the middle layer and the top of the outer layer are respectively connected to the bottom of the cage frame cover, so as to fix the inner layer, the middle layer and the outer layer between the cage frame seat and the cage frame cover.

[0029] In a preferred embodiment of the present invention, the linear regulating valve with metering function further comprises a valve cover, the valve cover is arranged at the top opening of the valve body, and the valve cover and the valve body enclose the chamber;

[0030] An annular valve seat and an annular first limiter are provided in the chamber. The valve seat and the first limiter are respectively provided at the bottom and the top of the chamber. The bottom and the top of the cage assembly are respectively connected to the valve seat and the first limiter.

[0031] In a preferred embodiment of the present invention, a first sealing ring is provided between the valve seat and the inner wall of the chamber;

[0032] And / or, a second sealing ring is provided between the cage frame seat and the inner wall of the chamber;

[0033] And / or, a third sealing ring is provided between the cage frame cover and the inner wall of the chamber;

[0034] And / or, a fourth sealing ring is provided between the first limiting member and the inner wall of the chamber;

[0035] And / or, a fifth sealing ring is provided between the first limiting member and the valve stem.

[0036] In a preferred embodiment of the present invention, the contact surface between the bottom end of the valve stem and the top of the valve seat is a conical surface.

[0037] In a preferred embodiment of the present invention, the linear regulating valve with a metering function includes a control actuator for controlling the moving position of the valve stem, the actuator end of the control actuator is connected to the top end of the valve stem, and the valve stem passes through the valve cover until at least a portion of the valve stem extends into the inner side of the inner sleeve and blocks the first through hole.

[0038] In a preferred embodiment of the present invention, the control actuator includes a motor and a transmission structure, the output shaft of the motor is connected to the top end of the valve stem through the transmission structure, and the valve stem is driven up and down by the motor and the transmission structure to adjust the sealing range of the valve stem on the first through hole.

[0039] In a preferred embodiment of the present invention, the control actuator includes a controller and a drive control module, the detection signal receiving end of the controller is electrically connected to the signal output end of the pressure difference detection element, the signal output end of the pressure detection element and the signal output end of the temperature detection element, respectively, and the control signal output end of the controller is electrically connected to the control end of the motor through the drive control module.

[0040] In a preferred embodiment of the present invention, a display screen and a button are provided on the control execution mechanism, the signal output end of the controller is electrically connected to the signal receiving end of the display screen, and the button is electrically connected to the control end of the controller.

[0041] As described above, the characteristics and advantages of the linear regulating valve with metering function of the utility model are:

[0042] A cage assembly is provided in the chamber of the valve body. The cage assembly includes at least an inner jacket layer, a middle jacket layer and an outer jacket layer sequentially arranged from the inside to the outside. The inlet of the valve body is communicated with the annulus in the chamber and located on the outer periphery of the cage assembly. The outlet of the valve body is communicated with the inner side of the inner jacket layer. The fluid entering from the inlet can be discharged from the outlet only after flowing through the multi-layer structure of the cage assembly. The multi-layer structure of the cage assembly and the arrangement of the through holes on each layer enable the valve body to have the ability to linearly adjust the flow area, so that the pressure regulation of the valve body is more refined and the flow measurement of the fluid flowing through is more accurate, especially for the regulation of high-pressure wells.

[0043] A differential pressure detection element is provided between the chamber of the valve body and the outlet of the valve body, and the differential pressure detection element can be used to collect differential pressure data between the upstream and downstream of the cage assembly; and a pressure detection element and a temperature detection element are provided at the inlet of the valve body, and the pressure data and temperature data of the fluid flowing through the inlet can be collected respectively by the pressure detection element and the temperature detection element. The position of the valve stem is adjusted according to the collected differential pressure data, pressure data and temperature data to control the opening of the first through hole, so as to achieve the purpose of accurately controlling the fluid flow through the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0045] Figure 1 This is a right side view of the linear regulating valve with metering function of the utility model;

[0046] Figure 2 This is a front cross-sectional view of the linear regulating valve with metering function of the utility model;

[0047] Figure 3 for Figure 2 A partial enlarged view of the location of the middle cage assembly;

[0048] Figure 4 This is a front cross-sectional view of a cage assembly in a linear regulating valve with a metering function according to the present invention;

[0049] Figure 5 for Figure 4 Cross-sectional view at the middle AA position;

[0050] Figure 6 This is a block diagram of the electrical connection structure of the cage assembly in the linear regulating valve with metering function of the utility model.

[0051] The accompanying drawings in this utility model are as follows:

[0052] 1. Valve body; 101. Inlet;

[0053] 102. outlet; 2. cage assembly;

[0054] 201, inner sleeve; 2011, first through hole;

[0055] 202, middle jacket layer; 2021, second through hole;

[0056] 203, outer layer; 2031, third through hole;

[0057] 204, cage frame seat; 205, cage frame cover;

[0058] 3. First joint; 301. First flow channel;

[0059] 4. Second joint; 401. Second flow channel;

[0060] 5. Valve stem; 6. Valve cover;

[0061] 7. Pressure measuring pipeline; 8. Pressure differential detection element;

[0062] 9. Pressure detection element; 10. Temperature detection element;

[0063] 11. Control actuator; 1101. Handwheel;

[0064] 1102. Motor; 1103. Transmission structure;

[0065] 1104. Second limiting member; 1105. Display screen;

[0066] 1106. Power supply module; 1107. Communication module;

[0067] 1108. Drive control module; 1109. Button;

[0068] 1110. Controller; 1111. Position encoding module;

[0069] 1112. Torque protection module; 12. Valve seat;

[0070] 13. First position limiting member; 14. First sealing ring;

[0071] 15. Second sealing ring; 16. Third sealing ring;

[0072] 17. Fourth sealing ring; 18. Fifth sealing ring. DETAILED DESCRIPTION

[0073] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0074] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0075] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0076] like Figures 1 to 6As shown, the utility model provides a linear regulating valve with a metering function, which includes: a valve body 1, a chamber formed in the valve body 1, and the valve body 1 has an inlet 101 and an outlet 102 respectively communicated with the chamber; a cage assembly 2, the cage assembly 2 is arranged in the chamber, and the cage assembly 2 includes at least an inner sleeve 201, a middle sleeve 202 and an outer sleeve 203 in a circular shape, the inner sleeve 201, the middle sleeve 202 and the outer sleeve 203 are sequentially sleeved from the inside to the outside (that is, the middle sleeve 202 is sleeved on the outer periphery of the inner sleeve 201, and the outer sleeve 203 is sleeved on the outer periphery of the middle sleeve 202), the inner sleeve 201 has a first through hole 2011 for fluid to flow through, the middle sleeve 202 has a second through hole 2021 for fluid to flow through, and the outer sleeve 203 has a third through hole 2031 for fluid to flow through. The inlet 101 of the valve body 1 is connected to the annular space in the chamber and located on the outer periphery of the cage assembly 2, and the outlet 102 of the valve body 1 is connected to the inner side of the inner sleeve layer 201. The fluid enters the valve body 1 from the inlet 101 of the valve body 1 (after the fluid flows into the valve body 1, it is located in the annular space between the chamber and the cage assembly 2). After that, the fluid flows through the third through hole 2031, the second through hole 2021 and the first through hole 2011 in sequence and enters the inner side of the inner sleeve layer 201, and finally flows from the inner side of the inner sleeve layer 201 to the outlet 102 of the valve body 1 and is discharged; the valve stem 5 is movably arranged on the inner side of the inner sleeve layer 201, and the outer wall of the valve stem 5 is close to the inner wall of the inner sleeve layer 201 and can block the first through hole 2011. By adjusting the position of the valve stem 5, the opening of the first through hole 2011 can be adjusted, thereby achieving the purpose of adjusting the fluid flow through the valve body 1.

[0077] The linear regulating valve with metering function of the present invention also includes a differential pressure detection element 8, a pressure detection element 9 and a temperature detection element 10. The differential pressure detection element 8 is arranged between the chamber and the outlet 102 of the valve body 1, and the differential pressure detection element 8 is used to collect differential pressure data between the upstream and downstream of the cage assembly 2; the pressure detection element 9 and the temperature detection element 10 are both arranged at the inlet 101 of the valve body 1, and the pressure detection element 9 is used to collect pressure data of the fluid flowing through the inlet 101, and the temperature detection element 10 is used to collect temperature data of the fluid flowing through the inlet 101; the position of the valve stem 5 can be adjusted according to the collected differential pressure data, pressure data and temperature data to control the opening of the first through hole 2011.

[0078] In the present invention, a cage assembly 2 is provided in the chamber of the valve body 1. The cage assembly 2 includes at least an inner jacket layer 201, a middle jacket layer 202 and an outer jacket layer 203 which are sequentially arranged from the inside to the outside. The inlet 101 of the valve body 1 is communicated with the annulus in the chamber and located on the outer periphery of the cage assembly 2. The outlet 102 of the valve body 1 is communicated with the inner side of the inner jacket layer 201. The fluid entering through the inlet 101 of the valve body 1 can only be discharged from the outlet 102 of the valve body 1 after flowing through the multi-layer structure of the cage assembly 2. The multi-layer structure of the cage assembly 2 and the arrangement of the through holes (the first through hole 2011, the second through hole 2021 and the third through hole 2031) on each jacket layer enable the valve body 1 to have the ability to linearly adjust the flow area, so that the pressure regulation of the valve body 1 is more refined and the flow measurement of the fluid flowing through is more accurate, especially for the regulation of high-pressure wells.

[0079] In addition, in the utility model, a pressure differential detection element 8 is provided between the chamber of the valve body 1 and the outlet 102 of the valve body 1, and the pressure differential detection element 8 can be used to collect the pressure differential data between the upstream and downstream of the cage assembly 2; and a pressure detection element 9 and a temperature detection element 10 are provided at the inlet 101 of the valve body 1, and the pressure data and temperature data of the fluid flowing through the inlet 101 of the valve body 1 can be collected respectively by the pressure detection element 9 and the temperature detection element 10. The position of the valve stem 5 is adjusted according to the collected pressure differential data, pressure data and temperature data to control the opening of the first through hole 2011, so as to achieve the purpose of accurately controlling the fluid flow rate flowing through the valve body 1.

[0080] In an optional embodiment of the present invention, Figures 1 to 3 As shown, the linear regulating valve with metering function also includes a first connector 3, which has a first flow channel 301; the inlet 101 of the valve body 1 is located on the side wall of the valve body 1, the first connector 3 is fixedly connected to the side wall of the valve body 1, and the first flow channel 301 is connected to the inlet 101 of the valve body 1. The upstream liquid is transported to the valve body 1 through the first flow channel 301, and then enters the annulus between the chamber and the cage assembly 2 through the inlet 101 of the valve body 1. Figure 2 As shown, the pressure detection element 9 and the temperature detection element 10 are respectively provided on the first joint 3 for collecting pressure data and temperature data of the incoming liquid.

[0081] Furthermore, the pressure detection element 9 may be, but is not limited to, a pressure sensor, and the temperature detection element 10 may be, but is not limited to, a temperature sensor.

[0082] In an optional embodiment of the present invention, Figures 1 to 3As shown, the linear regulating valve with a metering function also includes a second connector 4 having a second flow channel 401. The outlet 102 of the valve body 1 is located on the bottom wall of the valve body 1. The second connector 4 is fixedly connected to the bottom wall of the valve body 1, and the second flow channel 401 is connected to the outlet 102 of the valve body 1. The fluid flowing through the valve body 1 can be discharged sequentially through the outlet 102 of the valve body 1 and the second flow channel 401 of the second connector 4. A pressure measuring line 7 is provided between the second connector 4 and the valve body 1. One end of the pressure measuring line 7 is connected to the second connector 4, and the other end is connected to the valve body 1. The pressure measuring line 7 is connected to the chamber and the second flow channel 401 respectively. A pressure differential detection element 8 is provided on the pressure measuring line 7 to collect pressure differential data between the upstream and downstream sides of the cage assembly 2. Of course, the pressure difference detection element 8 can also be set at the position where the pressure measuring line 7 is connected to the second connector 4, or at the position where the pressure measuring line 7 is connected to the valve body 1, so as to detect the flow rate and temperature of the fluid flowing into the valve body 1.

[0083] Furthermore, the pressure difference detection element 8 may be, but is not limited to, a pressure difference sensor.

[0084] In an optional embodiment of the present invention, Figure 3 、 Figure 4 As shown, the first through hole 2011 is a vertically arranged strip-shaped through hole. The width of the first through hole 2011 along the circumference of the inner sleeve 201 is less than or equal to 5 mm. Furthermore, there are multiple first through holes 2011, which are spaced and evenly spaced along the circumference of the inner sleeve 201. By specifically designing the shape, size, and arrangement of the first through holes 2011, the opening of the first through holes 2011 can change linearly during movement of the valve stem 5, thereby achieving the purpose of linear flow regulation of the valve of this application and making the regulation of fluid flow more precise.

[0085] In an optional embodiment of the present invention, Figures 3 to 5 As shown, third through hole 2031 is a circular through hole. A second angle is formed between the central axis of third through hole 2031 and a radial line connecting the center point of third through hole 2031 and the central axis of outer jacket 203. The second angle is acute. The oblique design of third through hole 2031 allows fluid to flow obliquely through outer jacket 203 and into its interior, thereby forming a vortex and preventing the accumulation of impurities (such as sediment). The second angle can be, but is not limited to, 30°.

[0086] Further, such as Figures 3 to 5 As shown, there are multiple third through holes 2031, which are arranged in an array on the outer shell 203, so that the fluid passes through the outer shell 203 evenly in the circumferential direction of the outer shell 203, achieving a uniform and stable flow effect of the fluid.

[0087] In an optional embodiment of the present invention, Figures 3 to 5 As shown, second through-hole 2021 is a circular through-hole. A first angle is formed between the central axis of second through-hole 2021 and a radial line connecting the center point of second through-hole 2021 and the central axis of middle jacket 202. The first angle is acute. The oblique design of second through-hole 2021 allows fluid to flow obliquely through middle jacket 202 and into its interior, thereby forming a vortex and preventing the accumulation of impurities (such as sediment). The first angle can be, but is not limited to, 30°.

[0088] Further, such as Figures 3 to 5 As shown, there are multiple second through holes 2021, which are arranged in an array on the middle jacket layer 202, so that the fluid passes through the middle jacket layer 202 evenly in the circumferential direction of the middle jacket layer 202, achieving a uniform and stable flow effect of the fluid.

[0089] In an optional embodiment of the present invention, the first through hole 2011, the second through hole 2021 and the third through hole 2031 are staggered in the circumferential direction of the cage assembly 2 (i.e., the first through hole 2011, the second through hole 2021 and the third through hole 2031 are not on the same radial extension line of the cage assembly 2). By staggering the through holes on each jacket layer, a certain resistance can be generated to the high-pressure fluid in the process of flowing through the cage assembly 2, thereby achieving the effect of reducing the pressure.

[0090] In an optional embodiment of the present invention, Figures 2 to 4 As shown, the cage assembly 2 further includes an annular cage frame seat 204 and an annular cage frame cover 205. The bottom of the inner layer 201, the bottom of the middle layer 202, and the bottom of the outer layer 203 are respectively connected to the top of the cage frame seat 204, and the top of the inner layer 201, the top of the middle layer 202, and the top of the outer layer 203 are respectively connected to the bottom of the cage frame cover 205, so as to fix the inner layer 201, the middle layer 202, and the outer layer 203 between the cage frame seat 204 and the cage frame cover 205, thereby achieving the effect of circumferentially limiting the inner layer 201, the middle layer 202, and the outer layer 203, and preventing the inner layer 201, the middle layer 202, and / or the outer layer 203 from rotating during operation.

[0091] In this embodiment, the top of the cage frame seat 204 is provided with a stop structure that is respectively vertically aligned with the inner layer 201, the middle layer 202 and the outer layer 203, and the bottom of the inner layer 201, the bottom of the middle layer 202 and the bottom of the outer layer 203 are matched with the top of the cage frame seat 204 through the stop structure; the bottom of the cage frame cover 205 is provided with a slot structure that is respectively vertically aligned with the inner layer 201, the middle layer 202 and the outer layer 203, and the top of the inner layer 201, the top of the middle layer 202 and the top of the outer layer 203 are respectively snapped into the slot structure, so that the top of the inner layer 201, the top of the middle layer 202 and the top of the outer layer 203 are respectively matched with the bottom of the cage frame cover 205. Of course, the cage frame seat 204 and the cage frame cover 205 can also be connected to the inner layer 201, the middle layer 202 and the outer layer 203 in other ways as long as they can achieve stable assembly. The specific connection structure is not limited here.

[0092] In an optional embodiment of the present invention, Figures 1 to 3 As shown, the linear regulating valve with a metering function also includes a valve cover 6, which is arranged on the top opening of the valve body 1. The valve cover 6 and the valve body 1 enclose a chamber; an annular valve seat 12 and an annular first limiter 13 are arranged in the chamber, the valve seat 12 is arranged at the bottom of the chamber, and the first limiter 13 is arranged at the top of the chamber, the bottom of the cage assembly 2 is connected to the valve seat 12, and the top of the cage assembly 2 is connected to the first limiter 13, thereby fixing the cage assembly 2 in the chamber.

[0093] Further, such as Figure 3As shown, at least one first sealing ring 14 is arranged between the valve seat 12 and the inner wall of the chamber, and the first sealing ring 14 ensures that the outer wall of the valve seat 12 and the inner wall of the chamber are in a sealed state; and / or, at least one second sealing ring 15 is arranged between the cage frame seat 204 and the inner wall of the chamber, and the second sealing ring 15 ensures that the outer wall of the cage frame seat 204 and the inner wall of the chamber are in a sealed state; and / or, at least one third sealing ring 16 is arranged between the cage frame cover 205 and the inner wall of the chamber, A third sealing ring 16 ensures a sealed state between the outer wall of the cage frame cover 205 and the inner wall of the chamber; and / or, at least one fourth sealing ring 17 is provided between the first stopper 13 and the inner wall of the chamber, and the fourth sealing ring 17 ensures a sealed state between the outer wall of the first stopper 13 and the inner wall of the chamber; and / or, a fifth sealing ring 18 is provided between the first stopper 13 and the valve stem 5, and the fifth sealing ring 18 ensures a sealed state between the inner side wall of the first stopper 13 and the outer wall of the valve stem 5. The above-mentioned sealing structure ensures that the fluid entering the valve body 1 can only flow through the annulus between the cage assembly 2 and the chamber, pass through the cage assembly 2, and then flow out from the inner side of the inner jacket layer 201 of the cage assembly 2, thereby avoiding internal leakage of the valve and ensuring the stability of the fine adjustment of the fluid flow rate.

[0094] Furthermore, the contact surface between the bottom end of the valve stem 5 and the top of the valve seat 12 is a conical surface, and the roughness of the contact surface between the bottom end of the valve stem 5 and the top of the valve seat 12 is less than level 0.2, further ensuring the sealing effect of the valve stem 5 when the valve is closed, ensuring zero leakage.

[0095] Furthermore, in the present invention, the inner sleeve 201, the middle sleeve 202, the outer sleeve 203 and the valve stem 5 are all made of hard alloy materials, ensuring a certain erosion resistance and thus increasing the service life.

[0096] In an optional implementation of the present invention, Figure 1 、 Figure 2 As shown, the linear regulating valve with a metering function includes a control actuator 11 for controlling the moving position of the valve stem 5. The actuator end of the control actuator 11 is connected to the top end of the valve stem 5. The valve cover 6 is a hollow structure. The valve stem 5 passes through the hollow part of the valve cover 6 until at least part of the valve stem 5 extends into the inner side of the inner sleeve 201 and blocks the first through hole 2011.

[0097] Among them, such as Figure 1 、 Figure 2As shown, the control actuator 11 includes a motor 1102 and a transmission structure 1103. The output shaft of the motor 1102 is connected to the top of the valve stem 5 through the transmission structure 1103. The driving force provided by the motor 1102 is transmitted through the transmission structure 1103 to drive the valve stem 5 to move up and down, thereby achieving the purpose of adjusting the sealing range of the valve stem 5 with respect to the first through hole 2011. In this application, the transmission structure 1103 can adopt an existing transmission structure (such as a screw structure, a rack and pinion structure, a slide rail structure, etc.), and the specific structure of the transmission structure 1103 is not limited here, as long as it can drive the valve stem 5 to move up and down. Among them, the motor 1102 is a brushless DC motor.

[0098] Specifically, such as Figure 2 As shown, a second ring-shaped limiting member 1104 is sleeved on the top end of the valve stem 5 , and the top end of the valve stem 5 is connected to the transmission structure 1103 through the second limiting member 1104 .

[0099] In an optional implementation of the present invention, Figure 6 As shown, the control actuator 11 includes a controller 1110 (which can adopt a low-power microcontroller system) and a drive control module 1108. The detection signal receiving end of the controller 1110 is electrically connected to the signal output end of the pressure difference detection element 8, the signal output end of the pressure detection element 9, and the signal output end of the temperature detection element 10, respectively. The control signal output end of the controller 1110 is electrically connected to the control end of the motor 1102 through the drive control module 1108. The drive control module 1108 can adopt an existing drive circuit or chip, which can receive control instructions issued by the controller 1110 and control the working state of the motor 1102 according to the control instructions.

[0100] Further, such as Figure 1 、 Figure 6 As shown, the control actuator 11 is provided with a display screen 1105 and a button 1109 ( Figure 1 (not shown), the signal output terminal of controller 1110 is electrically connected to the signal receiving terminal of display screen 1105, and button 1109 is electrically connected to the control terminal of controller 1110. Display screen 1105 can display collected data and show the fluid flow rate in real time; button 1109 can control controller 1110, thereby controlling the operating state of motor 1102 and achieving the purpose of controlling the valve opening.

[0101] Further, such as Figure 6As shown, the control actuator 11 further includes a power supply module 1106, a communication module 1107, a position encoding module 1111, and a torque protection module 1112. The power supply module 1106, the communication module 1107, the position encoding module 1111, and the torque protection module 1112 are electrically connected to the controller 1110. The communication module 1107 may be, but is not limited to, a 485 remote communication module, the position encoding module 1111 may be, but is not limited to, a position encoder, and the torque protection module 1112 may be, but is not limited to, a circuit breaker or other disconnecting device, which can disconnect the circuit in a timely manner to achieve the purpose of protection.

[0102] The linear regulating valve with metering function of the present invention can measure the flow of the fluid flowing through the valve body 1 by using the following flow metering method, which includes:

[0103] Step S1: collecting pressure differential data between the upstream and downstream of the cage assembly 2 in the linear control valve with metering function through the pressure differential detection element 8, and collecting pressure data and temperature data of the fluid flowing through the inlet 101 of the linear control valve with metering function through the pressure detection element 9 and the temperature detection element 10 respectively;

[0104] Step S2: Obtaining the instantaneous flow rate of the fluid flowing through the valve body 1 under working conditions based on the collected pressure difference data, pressure data, temperature data, and the opening of the first through hole 2011 in the linear control valve with metering function;

[0105] Step S3: converting the instantaneous flow rate under working conditions to obtain the instantaneous flow rate under standard conditions.

[0106] Furthermore, the cumulative measurement of the instantaneous flow rate under standard conditions can be obtained by cumulatively measuring the instantaneous flow rate under working conditions.

[0107] Specifically, the flow calculation formula is:

[0108]

[0109] Where, N0 is the calibration coefficient; C is the outflow coefficient of the fluid; ε is the expansion coefficient of the fluid (determined by the collected temperature data); Δp is the pressure difference between the upstream and downstream of the cage assembly; p is the pressure upstream of the cage assembly (i.e., the pressure at the inlet); β is the diameter ratio, Wherein, d is the equivalent diameter of the plurality of first through holes at the current opening, D is the diameter at the inlet of the valve body; K δ is the shape coefficient, Where s is the stroke of the valve stem at the current opening.

[0110] The conversion formula between the instantaneous flow rate under standard conditions and the instantaneous flow rate under working conditions is:

[0111]

[0112] Among them, P1 is the pressure under standard conditions; V1 is the instantaneous flow rate under standard conditions; T1 is the temperature under standard conditions; P2 is the pressure under operating conditions; V2 is the instantaneous flow rate under operating conditions; T2 is the temperature under operating conditions.

[0113] The utility model is based on the calculation principle of a throttling flowmeter. By collecting the pressure difference data between the upstream and downstream of the cage assembly 2, the current valve opening, and the pressure data and temperature data of the fluid at the inlet 101, the instantaneous flow rate of the fluid flowing through the valve body 1 under the working conditions is dynamically calculated. After conversion, the instantaneous flow rate of the fluid flowing through the valve body 1 under the standard conditions can be obtained. By cumulatively measuring the flow rate, the cumulative flow rate of the fluid under the standard conditions can be obtained and displayed on the display screen 1105.

[0114] The characteristics and advantages of the linear regulating valve with metering function of the utility model are:

[0115] First, in this linear regulating valve with metering function, the fluid entering through the inlet 101 of the valve body 1 can be discharged from the outlet 102 of the valve body 1 only after flowing through the multi-layer structure of the cage assembly 2. The multi-layer structure of the cage assembly 2 and the arrangement of through holes on each layer enable the valve body 1 to have the ability to linearly adjust the flow area, making the pressure regulation of the valve body 1 more refined and the flow metering of the fluid flowing through more accurate, especially having a more significant effect on the regulation of high-pressure wells.

[0116] 2. The linear regulating valve with a metering function is provided with a pressure differential detection element 8 between the chamber of the valve body 1 and the outlet 102 of the valve body 1, and the pressure differential detection element 8 can be used to collect the pressure differential data between the upstream and downstream of the cage assembly 2; and a pressure detection element 9 and a temperature detection element 10 are provided at the inlet 101 of the valve body 1, and the pressure data and temperature data of the fluid flowing through the inlet 101 of the valve body 1 can be collected respectively by the pressure detection element 9 and the temperature detection element 10. The position of the valve stem 5 is adjusted according to the collected pressure differential data, pressure data and temperature data to control the opening of the first through hole 2011, so as to achieve the purpose of accurately controlling the flow rate of the fluid flowing through the valve body 1.

[0117] 3. This linear regulating valve with metering function overcomes the shortcomings of the existing flow meter and regulating valve being separately set, such as large volume and large errors. At the same time, in order to achieve fine pressure regulation and accurate flow measurement, it adopts a multi-stage cage structure with the function of linearly adjusting the flow area, achieving refined control of linear regulation flow, especially for high-pressure well regulation. It has a more significant effect.

[0118] It should be noted that, in the description of this application, the terms "first," "second," etc., are used solely for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, nor should they be understood to indicate or imply relative importance. Furthermore, in the description of this application, unless otherwise specified, "plurality" means two or more.

[0119] The above-mentioned various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0120] The above are only a few embodiments of the present invention. Although the embodiments disclosed in the present invention are as above, the contents are only for the purpose of facilitating the understanding of the present invention and are not intended to limit the present invention. Any person skilled in the art of the present invention may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in the present invention. However, the scope of patent protection of the present invention shall still be based on the scope defined by the appended claims.

Claims

1. A linear regulating valve with metering function, characterized in that: The linear regulating valve with metering function includes: a valve body, wherein a chamber is formed in the valve body, and the valve body has an inlet and an outlet respectively communicated with the chamber; a cage assembly disposed in the chamber, the cage assembly comprising at least an inner jacket layer, a middle jacket layer, and an outer jacket layer sequentially sleeved from the inside out, the inner jacket layer, the middle jacket layer, and the outer jacket layer respectively having a first through hole, a second through hole, and a third through hole through which fluid flows, the inlet of the valve body being in communication with an annulus located in the chamber and on the periphery of the cage assembly, and the outlet of the valve body being in communication with the inner side of the inner jacket layer; a valve stem, wherein the valve stem is movably disposed inside the inner sleeve, and an outer wall of the valve stem is in close contact with an inner wall of the inner sleeve and can seal the first through hole; a pressure differential detection element, the pressure differential detection element being disposed between the chamber and the outlet, and being used to collect pressure differential data between an upstream portion of the cage assembly and a downstream portion thereof; a pressure detection element and a temperature detection element, the pressure detection element and the temperature detection element being disposed at the inlet and respectively used to collect pressure data and temperature data of the fluid flowing through the inlet; The position of the valve stem is adjusted according to the pressure difference data, the pressure data and the temperature data to control the opening of the first through hole.

2. The linear regulating valve with metering function according to claim 1, characterized in that: The linear regulating valve with metering function further includes a first joint having a first flow channel; The inlet is located on the side wall of the valve body, the first joint is connected to the side wall of the valve body, and the first flow channel is communicated with the inlet; The pressure detection element and the temperature detection element are respectively arranged on the first joint.

3. The linear regulating valve with metering function according to claim 1, characterized in that: The linear regulating valve with metering function further includes a second connector having a second flow channel; The outlet is located on the bottom wall of the valve body, the second connector is connected to the bottom wall of the valve body, and the second flow channel is in communication with the outlet; A pressure measuring pipeline is provided between the second joint and the valve body, with two ends of the pressure measuring pipeline connected to the second joint and the valve body respectively, and the pressure measuring pipeline is communicated with the chamber and the second flow channel respectively; The differential pressure detection element is arranged on the pressure measuring pipeline, or at a position where the pressure measuring pipeline is connected to the second joint, or at a position where the pressure measuring pipeline is connected to the valve body.

4. The linear regulating valve with metering function according to claim 1, characterized in that: The first through hole is a vertically arranged strip-shaped through hole, and along the circumference of the inner sleeve layer, the width of the first through hole is less than or equal to 5 mm; There are multiple first through holes, and the multiple first through holes are arranged at intervals along the circumference of the inner sleeve layer.

5. The linear regulating valve with metering function according to claim 1, characterized in that: The second through hole is a circular through hole, and a first angle is formed between the central axis of the second through hole and a radial line connecting the center point of the second through hole and the central axis of the middle jacket layer, and the first angle is an acute angle; There are multiple second through holes, and the multiple second through holes are arranged in an array on the middle jacket layer.

6. The linear regulating valve with metering function according to claim 1, characterized in that: The third through hole is a circular through hole, and a second angle is formed between the central axis of the third through hole and a radial line connecting the center point of the third through hole and the central axis of the outer shell layer, and the second angle is an acute angle; There are multiple third through holes, and the multiple third through holes are arranged in an array on the outer shell layer.

7. The linear regulating valve with metering function according to claim 4, 5 or 6, characterized in that: In a circumferential direction of the cage assembly, the first through hole, the second through hole and the third through hole are staggered.

8. The linear regulating valve with metering function according to claim 1, characterized in that: The cage assembly further includes an annular cage frame seat and an annular cage frame cover. The bottom of the inner layer, the bottom of the middle layer, and the bottom of the outer layer are respectively connected to the top of the cage frame seat, and the top of the inner layer, the top of the middle layer, and the top of the outer layer are respectively connected to the bottom of the cage frame cover, so as to fix the inner layer, the middle layer, and the outer layer between the cage frame seat and the cage frame cover.

9. The linear regulating valve with metering function according to claim 8, characterized in that: The linear regulating valve with metering function further comprises a valve cover, which is arranged at the top opening of the valve body, and the valve cover and the valve body enclose the chamber; An annular valve seat and an annular first limiter are provided in the chamber. The valve seat and the first limiter are respectively provided at the bottom and the top of the chamber. The bottom and the top of the cage assembly are respectively connected to the valve seat and the first limiter.

10. The linear regulating valve with metering function according to claim 9, characterized in that: A first sealing ring is provided between the valve seat and the inner wall of the chamber; And / or, a second sealing ring is provided between the cage frame seat and the inner wall of the chamber; And / or, a third sealing ring is provided between the cage frame cover and the inner wall of the chamber; And / or, a fourth sealing ring is provided between the first limiting member and the inner wall of the chamber; And / or, a fifth sealing ring is provided between the first limiting member and the valve stem.

11. The linear regulating valve with metering function according to claim 9, characterized in that: The contact surface between the bottom end of the valve stem and the top of the valve seat is a conical surface.

12. The linear regulating valve with metering function according to claim 9, characterized in that: The linear regulating valve with metering function includes a control actuator for controlling the moving position of the valve stem, the actuator end of the control actuator is connected to the top end of the valve stem, and the valve stem passes through the valve cover until at least a portion of the valve stem extends into the inner side of the inner sleeve layer and blocks the first through hole.

13. The linear regulating valve with metering function according to claim 12, characterized in that: The control actuator includes a motor and a transmission structure. The output shaft of the motor is connected to the top of the valve stem through the transmission structure. The motor and the transmission structure drive the valve stem to move up and down to adjust the blocking range of the valve stem on the first through hole.

14. The linear regulating valve with metering function according to claim 13, characterized in that: The control actuator includes a controller and a drive control module. The detection signal receiving end of the controller is electrically connected to the signal output end of the pressure difference detection element, the signal output end of the pressure detection element and the signal output end of the temperature detection element respectively. The control signal output end of the controller is electrically connected to the control end of the motor through the drive control module.

15. The linear regulating valve with metering function according to claim 14, characterized in that: The control execution mechanism is provided with a display screen and a button. The signal output end of the controller is electrically connected to the signal receiving end of the display screen, and the button is electrically connected to the control end of the controller.

Images