Linear regulating valve with metering function and flow metering method

Abstract

The invention relates to a linear regulating valve with a metering function and a flow metering method. 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 technical problems that an adjusting valve does not have a flow metering function and is poor in pressure adjusting effect are solved.

Description

Technical Field

[0001] The invention relates to the field of valve structures, and in particular to a linear regulating valve with a metering function and a flow metering method. 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 throttling holes are 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 pressure regulation function of the valve is achieved through multi-stage throttling and pressure reduction. Since the throttling holes on the cage are circular, they only have fluid permeability and do not have the function of linear regulation. As the throttling hole opening increases, the flow area will increase exponentially, so the pressure regulation effect is poor.

[0003] With regard to the problem in the related technology that the existing regulating valve does not have the flow metering function and the pressure regulating effect is poor, no effective solution has been given so far.

[0004] Therefore, the inventor, relying on his many years of experience and practice in related industries, proposes a linear regulating valve with metering function and a flow metering method to overcome the defects of the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a linear control valve with metering function and a flow metering method, 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 in the regulation of high-pressure wells. It has a more significant effect.

[0006] The purpose of the present invention can be achieved by adopting the following scheme:

[0007] The present invention 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, wherein the cage assembly is arranged in the chamber, and the cage assembly at least comprises an inner jacket layer, a middle jacket layer and an outer jacket layer which are sequentially sleeved from the inside to the outside, wherein the inner jacket layer, the middle jacket layer and the outer jacket layer respectively have a first through hole, a second through hole and a third through hole through which a fluid flows, the inlet of the valve body is communicated with an annulus in the chamber and located at the periphery of the cage assembly, and the outlet of the valve body is communicated with the inner side of the inner jacket layer;

[0010] A valve stem, wherein the valve stem is movably disposed inside the inner sleeve layer, and the outer wall of the valve stem is close to the inner wall of the inner sleeve layer and can block the first through hole;

[0011] A pressure difference detection element, the pressure difference detection element is arranged between the chamber and the outlet, and the pressure difference detection element is used to collect pressure difference data between the upstream and downstream of the cage assembly;

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

[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, wherein the first connector has 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 comprises a second connector, wherein the second connector has a second flow channel;

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

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

[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 layer, the width of the first through hole is less than or equal to 5 mm;

[0022] There are a plurality of the first through holes, and the plurality of the first through holes are arranged at intervals along the circumferential direction 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 to the central axis of the middle jacket layer, and the first angle is an acute angle;

[0024] There are a plurality of the second through holes, and the plurality of the 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 to the central axis of the outer jacket 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 are enclosed to form the chamber;

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

[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 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 part 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 blocking 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 buttons are provided on the control execution mechanism, a signal output end of the controller is electrically connected to a signal receiving end of the display screen, and the buttons are electrically connected to a control end of the controller.

[0041] The present invention provides a flow metering method, wherein the flow metering method uses the above-mentioned linear regulating valve with metering function to measure the flow of a fluid flowing through a valve body, and the flow metering method comprises:

[0042] The pressure difference data between the upstream and downstream of the cage assembly in the linear regulating valve with metering function are collected by the pressure difference detection element, and the pressure data and temperature data of the fluid flowing through the inlet of the linear regulating valve with metering function are collected by the pressure detection element and the temperature detection element respectively;

[0043] Obtaining the instantaneous flow rate of the fluid flowing through the valve body under working conditions from the pressure difference data, the pressure data, the temperature data and the opening of the first through hole in the linear regulating valve with metering function;

[0044] The instantaneous flow rate under the working conditions is converted to obtain the instantaneous flow rate under standard conditions.

[0045] In a preferred embodiment of the present invention, the cumulative measurement of the instantaneous flow rate under the standard condition is obtained by cumulatively measuring the instantaneous flow rate under the working condition.

[0046] As described above, the characteristics and advantages of the linear regulating valve with metering function and the flow metering method of the present invention are:

[0047] A cage assembly is arranged in the chamber of the valve body, and the cage assembly includes at least an inner jacket layer, a middle jacket layer and an outer jacket layer which are sequentially arranged from the inside to the outside. The inlet of the valve body is connected with the annulus in the chamber and located on the outer periphery of the cage assembly, and the outlet of the valve body is connected with the inner side of the inner jacket layer. The fluid entering from the inlet can be discharged from the outlet only after passing 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 jacket 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, which has a more significant effect.

[0048] A differential pressure detection element is arranged 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 arranged 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 through 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 rate flowing through the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0050] in:

[0051] Figure 1 It is a right side view of the linear regulating valve with metering function of the present invention;

[0052] Figure 2 It is a front cross-sectional view of a linear regulating valve with a metering function of the present invention;

[0053] Figure 3 for Figure 2A partial enlarged view of the location of the middle cage assembly;

[0054] Figure 4 It is a front cross-sectional view of a cage assembly in a linear regulating valve with a metering function of the present invention;

[0055] Figure 5 for Figure 4 Cross-sectional view at the AA position;

[0056] Figure 6 The present invention is a block diagram of the electrical connection structure of the cage assembly in the linear regulating valve with metering function.

[0057] The accompanying drawings in the present invention are:

[0058] 1. Valve body; 101. Import;

[0059] 102. outlet; 2. cage assembly;

[0060] 201, inner sleeve layer; 2011, first through hole;

[0061] 202, middle jacket layer; 2021, second through hole;

[0062] 203, outer jacket layer; 2031, third through hole;

[0063] 204, cage frame seat; 205, cage frame cover;

[0064] 3. First joint; 301. First flow channel;

[0065] 4. Second joint; 401. Second flow channel;

[0066] 5. Valve stem; 6. Valve cover;

[0067] 7. Pressure measuring pipeline; 8. Pressure difference detection element;

[0068] 9. Pressure detection element; 10. Temperature detection element;

[0069] 11. Control actuator; 1101. Handwheel;

[0070] 1102. Motor; 1103. Transmission structure;

[0071] 1104. A second stopper; 1105. A display screen;

[0072] 1106. Power supply module; 1107. Communication module;

[0073] 1108. drive control module; 1109. button;

[0074] 1110. controller; 1111. position encoding module;

[0075] 1112. Torque protection module; 12. Valve seat;

[0076] 13. A first stopper; 14. A first sealing ring;

[0077] 15. Second sealing ring; 16. Third sealing ring;

[0078] 17. Fourth sealing ring; 18. Fifth sealing ring. DETAILED DESCRIPTION

[0079] 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, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0080] 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 a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0081] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0082] Implementation Method 1

[0083] like Figures 1 to 6As shown, the present invention provides a linear regulating valve with a metering function, the linear regulating valve with a metering function comprises: a valve body 1, a chamber is formed in the valve body 1, 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, the cage assembly 2 at least comprises an inner sleeve layer 201, a middle sleeve layer 202 and an outer sleeve layer 203 in a circular ring shape, the inner sleeve layer 201, the middle sleeve layer 202 and the outer sleeve layer 203 are sequentially sleeved from the inside to the outside (that is, the middle sleeve layer 202 is sleeved on the outer periphery of the inner sleeve layer 201, and the outer sleeve layer 203 is sleeved on the outer periphery of the middle sleeve layer 202), the inner sleeve layer 201 has a first through hole 2011 for fluid to flow through, the middle sleeve layer 202 has a second through hole 2021 for fluid to flow through, and the outer sleeve layer 203 has a third through hole 2031 for fluid to flow through. The inlet 101 of the valve body 1 is communicated with 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 communicated with 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, 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. The opening of the first through hole 2011 can be adjusted by adjusting the position of the valve stem 5, thereby achieving the purpose of adjusting the fluid flow through the valve body 1.

[0084] 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 the 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, the pressure detection element 9 is used to collect the pressure data of the fluid flowing through the inlet 101, and the temperature detection element 10 is used to collect the 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.

[0085] In the present invention, a cage assembly 2 is arranged in the chamber of the valve body 1, and the cage assembly 2 at least includes 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 connected with the annulus 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 with the inner side of the inner jacket layer 201. The fluid entering from 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 the through holes (the first through hole 2011, the second through hole 2021 and the third through hole 2031) on each jacket 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, which has a more significant effect.

[0086] In addition, in the present invention, a differential pressure detection element 8 is provided between the chamber of the valve body 1 and the outlet 102 of the valve body 1, and the differential pressure data between the upstream of the cage assembly 2 and the downstream of the cage assembly 2 can be collected through the differential pressure detection element 8; 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 the temperature data of the fluid flowing through the inlet 101 of the valve body 1 can be collected through the pressure detection element 9 and the temperature detection element 10 respectively, and the position of the valve stem 5 is adjusted according to the collected differential pressure 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.

[0087] 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 joint 3, and the first joint 3 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 joint 3 is fixedly connected to the side wall of the valve body 1, and the first flow channel 301 is communicated with the inlet 101 of the valve body 1, and 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 arranged on the first joint 3 to collect the pressure data and temperature data of the incoming liquid.

[0088] Further, 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.

[0089] In an optional embodiment of the present invention, Figures 1 to 3As shown, the linear regulating valve with metering function also includes a second joint 4, and the second joint 4 has 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 joint 4 is fixedly connected to the bottom wall of the valve body 1, and the second flow channel 401 is communicated with the outlet 102 of the valve body 1, and the fluid flowing through the valve body 1 can be discharged through the outlet 102 of the valve body 1 and the second flow channel 401 of the second joint 4 in sequence. A pressure measuring pipeline 7 is arranged between the second joint 4 and the valve body 1, one end of the pressure measuring pipeline 7 is connected to the second joint 4, and the other end of the pressure measuring pipeline 7 is connected to the valve body 1, and the pressure measuring pipeline 7 is communicated with the chamber and the second flow channel 401 respectively, and the pressure differential detection element 8 is arranged on the pressure measuring pipeline 7 to realize the collection of pressure differential data between the upstream and downstream of the cage assembly 2. Of course, the differential pressure detection element 8 can also be set at the position where the pressure measuring line 7 is connected to the second joint 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.

[0090] Furthermore, the pressure difference detection element 8 may be, but is not limited to, a pressure difference sensor.

[0091] 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, and the width of the first through hole 2011 along the circumference of the inner sleeve 201 is less than or equal to 5 mm; in addition, there are multiple first through holes 2011, and the multiple first through holes 2011 are spaced and evenly arranged along the circumference of the inner sleeve 201. Through the special settings of the shape, size and arrangement of the first through holes 2011, the opening of the first through holes 2011 can change linearly during the movement of the valve stem 5, so as to achieve the purpose of the valve of the present application being able to linearly adjust the flow rate, so that the adjustment of the fluid flow rate is more accurate.

[0092] In an optional embodiment of the present invention, Figures 3 to 5 As shown, the third through hole 2031 is a circular through hole, and there is a second angle between the central axis of the third through hole 2031 and the radial line from the center point of the third through hole 2031 to the central axis of the outer jacket 203, wherein the second angle is an acute angle. Through the oblique design of the third through hole 2031, the fluid flows obliquely through the outer jacket 203 and enters its inner side, thereby forming a certain vortex to prevent the accumulation of impurities (such as mud and sand). The second angle can be but is not limited to 30°.

[0093] 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 jacket layer 203, so that the fluid passes through the outer jacket layer 203 evenly in the circumferential direction of the outer jacket layer 203, thereby achieving a uniform and stable flow effect of the fluid.

[0094] In an optional embodiment of the present invention, Figures 3 to 5 As shown, the second through hole 2021 is a circular through hole, and there is a first angle between the central axis of the second through hole 2021 and the radial line connecting the center point of the second through hole 2021 to the central axis of the middle jacket layer 202, wherein the first angle is an acute angle. Through the oblique design of the second through hole 2021, the fluid flows obliquely through the middle jacket layer 202 and enters its inner side, thereby forming a certain vortex to prevent the accumulation of impurities (such as mud and sand). The first angle can be but is not limited to 30°.

[0095] 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.

[0096] In an optional embodiment of the present invention, in the circumferential direction of the cage assembly 2, the first through hole 2011, the second through hole 2021 and the third through hole 2031 are staggered (that is, 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 staggered installation of the through holes on each jacket layer, a certain resistance can be generated when the high-pressure fluid flows through the cage assembly 2, thereby achieving the effect of reducing the pressure.

[0097] In an optional embodiment of the present invention, Figures 2 to 4 As shown, the cage assembly 2 also includes a ring-shaped cage frame seat 204 and a ring-shaped 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 that the inner layer 201, the middle layer 202 and the outer layer 203 are fixed between the cage frame seat 204 and the cage frame cover 205, so as to achieve the function of circumferentially limiting the inner layer 201, the middle layer 202 and the outer layer 203, and prevent the inner layer 201, the middle layer 202 and / or the outer layer 203 from rotating during operation.

[0098] In this embodiment, the top of the cage frame seat 204 is arranged at a stop structure which 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 and connected 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 which 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 and connected with the bottom of the cage frame cover 205. Of course, the cage frame seat 204 and the cage frame cover 205 may also be connected to the inner layer 201, the middle layer 202 and the outer layer 203 in other ways as long as stable assembly can be achieved, and the specific connection structure is not limited here.

[0099] In an optional embodiment of the present invention, Figures 1 to 3 As shown, the linear regulating valve with metering function also includes a valve cover 6, which is arranged on the top opening of the valve body 1, and the valve cover 6 and the valve body 1 are enclosed to form a chamber; a circular valve seat 12 and a circular first limiter 13 are arranged in the chamber, the valve seat 12 is arranged at the bottom of the chamber, 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, so that the cage assembly 2 is fixed in the chamber.

[0100] 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, and the ... The third sealing ring 16 ensures that the outer wall of the cage frame cover 205 and the inner wall of the chamber are in a sealed state; and / or, at least one fourth sealing ring 17 is arranged between the first stopper 13 and the inner wall of the chamber, and the fourth sealing ring 17 ensures that the outer wall of the first stopper 13 and the inner wall of the chamber are in a sealed state; and / or, a fifth sealing ring 18 is arranged between the first stopper 13 and the valve stem 5, and the fifth sealing ring 18 ensures that the inner wall of the first stopper 13 and the outer wall of the valve stem 5 are in a sealed state. Through the arrangement of the above-mentioned sealing structure, the fluid entering the valve body 1 can only flow out from the inner side of the inner sleeve layer 201 in the cage assembly 2 after passing through the annular space between the cage assembly 2 and the chamber, thereby avoiding the occurrence of internal leakage of the valve and ensuring the stability of the fine adjustment of the fluid flow.

[0101] 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 and ensuring zero leakage.

[0102] Furthermore, in the present invention, the inner sleeve layer 201, the middle sleeve layer 202, the outer sleeve layer 203 and the valve stem 5 are all made of hard alloy materials to ensure a certain erosion resistance and thus increase the service life.

[0103] In an optional implementation of the present invention, Figure 1 , Figure 2 As shown, the linear regulating valve with metering function includes a control actuator 11 for controlling the moving position of the valve stem 5, the execution 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, and 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.

[0104] Among them, 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 motor 1102 provides a driving force, and the transmission is performed through the transmission structure 1103 to drive the valve stem 5 to move up and down, thereby achieving the purpose of adjusting the blocking range of the valve stem 5 to the first through hole 2011. In the present application, the transmission structure 1103 can adopt an existing transmission structure (such as a screw structure, a rack and pinion matching structure, a slide rail structure, etc.), and the specific structure of the transmission structure 1103 is not limited here, and it can drive the valve stem 5 to move up and down. Among them, the motor 1102 is a DC brushless motor.

[0105] Specifically, Figure 2 As shown, a second annular position-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 via the second position-limiting member 1104 .

[0106] In an optional implementation of the present invention, Figure 6 As shown, the control actuator 11 includes a controller 1110 (a low-power microcontrol system may be used) 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, and 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. Among them, the drive control module 1108 can use an existing drive circuit or chip, can receive the control instruction issued by the controller 1110, and control the working state of the motor 1102 according to the control instruction.

[0107] 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 The signal output terminal of the controller 1110 is electrically connected to the signal receiving terminal of the display screen 1105, and the button 1109 is electrically connected to the control terminal of the controller 1110. The collected data can be displayed on the display screen 1105, and the flow rate of the fluid can be displayed in real time; the controller 1110 can be controlled by the button 1109, and then the working state of the motor 1102 can be controlled to achieve the purpose of controlling the valve opening.

[0108] Further, such as Figure 6As shown, the control actuator 11 further includes a power supply module 1106, a communication module 1107, a position coding module 1111 and a torque protection module 1112, and the power supply module 1106, the communication module 1107, the position coding module 1111 and the torque protection module 1112 are respectively electrically connected to the controller 1110. Among them, the communication module 1107 can be but not limited to a 485 remote communication module, the position coding module 1111 can be but not limited to a position encoder, and the torque protection module 1112 can be but not limited to a circuit breaker or other circuit breaker devices, which can disconnect the circuit in time to achieve the purpose of protection.

[0109] The characteristics and advantages of the linear regulating valve with metering function of the present invention are:

[0110] 1. The linear regulating valve with metering function can discharge the fluid entering from the inlet 101 of the valve body 1 through the outlet 102 of the valve body 1 only after passing 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 on each 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 metering of the fluid flowing through is more accurate, especially for the regulation of high-pressure wells.

[0111] 2. The linear regulating valve with metering function is provided with a pressure difference detection element 8 between the chamber of the valve body 1 and the outlet 102 of the valve body 1, and the pressure difference detection element 8 can be used to collect the pressure difference data between the upstream of the cage assembly 2 and the 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, and the position of the valve stem 5 is adjusted according to the collected pressure difference 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.

[0112] 3. The linear regulating valve with metering function overcomes the shortcomings of large volume and large error caused by the separate setting of the existing flow meter and the regulating valve. At the same time, in order to achieve fine pressure regulation and accurate flow measurement, a multi-stage cage structure is adopted, which has the function of linearly adjusting the flow area, so as to achieve fine control of linear regulation flow, especially for high-pressure well regulation. It has a more significant effect.

[0113] Implementation Method 2

[0114] The present invention provides a flow metering method, which uses the above-mentioned linear regulating valve with metering function to measure the flow of the fluid flowing through the valve body 1, and the flow metering method includes:

[0115] Step S1: collecting pressure difference data between the upstream and downstream of the cage assembly 2 in the linear control valve with metering function through the pressure difference 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;

[0116] Step S2: Obtaining the instantaneous flow rate of the fluid flowing through the valve body 1 under the working condition from 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;

[0117] Step S3: converting the instantaneous flow rate under working conditions to obtain the instantaneous flow rate under standard conditions.

[0118] Furthermore, the cumulative measurement of the instantaneous flow rate under the standard condition can be obtained by cumulatively measuring the instantaneous flow rate under the working condition.

[0119] Specifically, the flow calculation formula is:

[0120]

[0121] 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 factor, Where s is the stroke of the valve stem at the current opening.

[0122] The conversion formula between the instantaneous flow rate under standard conditions and the instantaneous flow rate under working conditions is:

[0123]

[0124] 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.

[0125] The present invention is based on the calculation principle of the 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 condition is dynamically calculated. After conversion, the instantaneous flow rate of the fluid flowing through the valve body 1 under the standard condition can be obtained. By cumulatively measuring the flow rate, the cumulative flow rate of the fluid under the standard condition can be obtained and displayed on the display screen 1105.

[0126] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0127] The above-mentioned various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0128] The above are only a few embodiments of the present invention. Although the embodiments disclosed by the present invention are as above, the contents are only embodiments adopted for facilitating the understanding of the present invention and are not used to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modification and change in the form and details of the embodiments without departing from the spirit and scope disclosed by the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined by the attached 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 connector 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.

16. A flow measurement method, characterized in that: The flow metering method uses a linear regulating valve with a metering function according to any one of claims 1 to 15 to measure the flow of a fluid flowing through a valve body, and the flow metering method includes: collecting pressure differential data between an upstream side and a downstream side of a cage assembly in the linear regulating valve with a metering function through a pressure differential detection element, and collecting pressure data and temperature data of a fluid flowing through an inlet of the linear regulating valve with a metering function through a pressure detection element and a temperature detection element, respectively; Obtaining an instantaneous flow rate of the fluid flowing through the valve body under working conditions based on the pressure difference data, the pressure data, the temperature data, and the opening of the first through hole in the linear control valve with a metering function; The instantaneous flow rate under the working conditions is converted to obtain the instantaneous flow rate under standard conditions.

17. The flow measurement method according to claim 16, wherein: The cumulative measurement of the instantaneous flow under the working conditions is obtained by cumulatively measuring the instantaneous flow under the standard conditions.

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