CN215861797U - Axial flow control valve - Google Patents
Axial flow control valve Download PDFInfo
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- CN215861797U CN215861797U CN202120749214.4U CN202120749214U CN215861797U CN 215861797 U CN215861797 U CN 215861797U CN 202120749214 U CN202120749214 U CN 202120749214U CN 215861797 U CN215861797 U CN 215861797U
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Abstract
An axial flow control valve comprising: the valve comprises a valve body, a valve core, a valve seat and a driving device; the valve core is fixedly arranged in the valve body, an annular fluid channel is formed between the valve core and the valve body, the valve seat is tubular and is connected to the inner wall of the valve body in a sealing mode, the valve body, the valve core and the valve seat are coaxially arranged, and the driving device is used for driving the valve seat to move along the axial direction of the valve body so as to be connected with or separated from the valve core, so that the flow control valve is closed or opened. The axial flow type flow control valve drives the valve seat to move through the driving device, so that the valve seat is connected with or separated from the valve core, and the flow control valve is closed or opened. The problems of unstable integral shape line of the throttling piece, flow separation, flow resistance increase and the like caused by the movement of the driving valve core of the driving device in the prior art are solved.
Description
Technical Field
The utility model relates to the field of flow control, in particular to an axial-flow control valve.
Background
Control valves (also known as regulator valves) are end-effectors of control loops, and are important in process control in the process industry and have long been a technical weakness. The axial flow control valve developed by MMOKVELD company as a representative solves the problems of poor maintenance performance, poor reliability, poor durability and the like of the traditional angle valve, butterfly valve, ball valve and sleeve valve.
The axial flow type control valve is different from a conventional straight stroke control valve, changes the integral flow structure of the conventional straight stroke control valve, changes the phenomenon that the flow direction of a throttling element of the conventional straight stroke control valve is inconsistent with the flow direction of a medium, causes less energy loss of the medium, increases the flow capacity by 20 to 50 percent compared with the conventional straight stroke control valve, has the characteristics of low flow resistance coefficient, firmness, durability, low maintenance, high performance and the like, and is widely applied to the regulation and control of natural gas, crude oil, product oil and other non-corrosive gases and liquids. Various axial flow control valves are proposed by relevant professionals and manufacturers at home and abroad, such as US4638832, US2011/0017306a1, WO2019/20153a2, CN210770459U and the like.
The existing axial flow control valve has the following problems:
1. the structural form of the valve core destroys the rectifying effect of the throttling element. The valve core is usually arranged inside the throttling element and connected with a driving device consisting of a pneumatic, hydraulic or mechanical gear rack, and the valve core is displaced back and forth along the axial direction of the circulating pipeline at the inlet or the outlet of the valve body to regulate the medium flow by regulating the relative position between the valve core and a valve seat arranged at the inlet and the outlet. The uncertainty of the position of the valve core causes the instability of the whole shape line of the throttling piece and the irregularity of the transition connection between the valve core and the throttling piece, which causes the generation of flow separation, thereby increasing the negative effects of flow resistance and the like.
2. The drive mechanism of the valve core is often arranged in the throttling element, so that the appearance of the throttling element is very large and heavy, and the fluid mechanical property is negatively influenced. Meanwhile, in order to connect with an actuator outside the valve body, a large enough connecting channel must be arranged between the throttling element and the pipe wall, which further increases the flow resistance and influences the flowing state of the medium in the pipe.
3. The fluid mechanics structure of the throttling element in the valve body is not fully optimized, and the flow guiding and resistance reducing effects are not ideal.
4. The back of the throttle and the periphery of the valve core are provided with a valve cage which is coaxial with the valve core, namely, the wall surface of the back of the throttle is provided with a plurality of guide holes or guide grooves, and medium in the pipe flows through the throttle and then flows out from the guide holes or grooves which are not shielded by the valve core. The medium flow in the pipeline is controlled by controlling the shielding degree of the valve core to the valve cage. The design of the valve cage can reduce noise and vibration to a certain extent, but can increase flow resistance and increase pressure loss in the pipeline.
Accordingly, it would be desirable to develop a new axial flow control valve to at least partially overcome the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an axial flow type flow control valve, which is used for optimizing the flow state of a medium in the control valve and reducing the flow resistance.
The present invention provides an axial flow control valve, comprising: the valve comprises a valve body, a valve core, a valve seat and a driving device; the valve body is tubular, the valve core is fixedly arranged in the valve body, an annular fluid channel is formed between the valve core and the valve body, the valve seat is tubular and is connected to the inner wall of the valve body in a sealing mode, the valve body, the valve core and the valve seat are coaxially arranged, and the driving device is used for driving the valve seat to move along the axial direction of the valve body so as to be connected with or separated from the valve core, so that the flow control valve is closed or opened.
Preferably, the valve core comprises a head part, a middle part and a tail part which are connected in sequence;
the valve core is spindle-shaped or drop-shaped, the axial section of the head part is arc-shaped or parabolic, and the middle part is a cylinder; or the axial section of the head part is arc-shaped or parabolic, the middle part is a cylinder, and the tail part and the head part are in the same shape.
Preferably, the valve core comprises a head part, a middle part and a tail part which are connected in sequence, the head part and the tail part are cones, the middle part is a cylinder, and the taper angle of the head part is larger than or equal to that of the tail part.
Preferably, the valve seat is close to one end of the valve core, and the inner wall of the valve seat is a smooth curved surface;
when the valve seat is connected with the valve core, the inner wall of the valve seat is tangent to the outer surface of the valve core.
Preferably, the peripheries of the two ends of the valve seat are respectively provided with an annular sealing ring so as to be connected with the inner wall of the valve body in a sealing manner.
Preferably, the driving device is arranged outside the valve body; the periphery of the valve seat is provided with a rack, the driving device comprises an actuator and a gear, the actuator is used for driving the gear, and the gear is in transmission connection with the rack.
Preferably, the driving device is arranged outside the valve body; the periphery of the valve seat is provided with threads, the driving device comprises an actuator and a worm, the actuator is used for driving the screw, and the worm is in transmission connection with the threads.
Preferably, the driving device is arranged outside the valve body; the driving device comprises an actuator and an air cylinder or an oil hydraulic cylinder, the actuator is used for driving a piston of the air cylinder or the oil hydraulic cylinder, and a piston rod of the air cylinder or the oil hydraulic cylinder is connected with the periphery of the valve seat.
Preferably, the axial flow control valve further comprises a plurality of support pieces, the support pieces are uniformly distributed along the circumferential direction of the valve core, one end of each support piece is connected to the periphery of the valve core, and the other end of each support piece is connected to the inner wall of the valve body.
Preferably, a high-pressure tapping hole and a low-pressure tapping hole are formed in the side wall of the valve body, the high-pressure tapping hole is close to one end, facing the fluid inlet, of the valve core, and the low-pressure tapping hole is close to the middle of the valve core;
the flow control valve also comprises a differential pressure type flowmeter, and a high-pressure inlet end and a low-pressure inlet end of the differential pressure type flowmeter are respectively connected with the high-pressure measuring hole and the low-pressure measuring hole so as to measure the flow;
the driving device is connected with the differential pressure type flowmeter and drives the valve seat to move along the axial direction of the valve body according to the flow measured by the differential pressure type flowmeter.
The utility model has the beneficial effects that:
1. the valve core of the axial flow type flow control valve is fixed, the valve seat is connected with the driving device, and the axial movement of the valve body is connected with or separated from the valve core under the action of the driving device, so that the flow control valve is closed or opened, and the problems of unstable integral shape line, flow separation, flow resistance increase and the like of a throttling piece caused by the movement of the valve core driven by the driving device in the prior art are solved.
2. The driving device is arranged outside the valve body, so that the flow state of the medium in the pipeline cannot be adversely interfered, and the daily maintenance is facilitated.
3. The appearance of case is optimized, can reduce the flow resistance to the utmost extent, guarantees the rectification effect. When the medium flows through the valve element, almost no flow separation occurs, so that adverse effects such as noise and vibration can be reduced. When the medium in the pipeline is liquid, the possibility of flash evaporation, cavitation and cavitation can be reduced. The shape of the valve seat is optimized, so that the flow resistance can be reduced to the greatest extent, and the damage to the whole flow field is avoided.
4. The double-throttling piece design of the valve core and the valve seat provides great convenience for directly utilizing the control valve to accurately measure the flow. The valve core or the valve seat does not adopt a valve cage or similar design in the prior art, and the line shape of an axial flow passage in the valve body can not be damaged, so that the damage to the whole flow field is avoided.
5. The support sheet firmly fixes the valve core on the axis of the valve body, and besides, no additional component is arranged on the valve core, so that the adverse effect on the rectifying effect of the valve core can be avoided.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts.
Fig. 1 shows a schematic structural view of an axial flow control valve according to a first exemplary embodiment of the present invention;
FIG. 2 shows a flow characteristic diagram of an axial flow control valve according to a first exemplary embodiment of the present invention;
fig. 3 shows a schematic structural view of an axial flow control valve according to a second exemplary embodiment of the present invention;
fig. 4 shows a schematic structural view of an axial flow control valve according to a third exemplary embodiment of the present invention;
fig. 5 shows a schematic structural view of an axial flow control valve according to a fourth exemplary embodiment of the present invention;
fig. 6 shows a schematic structural view of an axial flow control valve according to a fifth exemplary embodiment of the present invention;
fig. 7 shows a schematic structural view of an axial flow control valve according to a sixth exemplary embodiment of the present invention;
fig. 8 shows a schematic structural view of an axial flow control valve according to a seventh exemplary embodiment of the present invention.
Description of reference numerals:
the flowmeter comprises a valve body 1, a valve core 2, a support sheet 3, a valve seat 4, a seal ring 5, a driving gear 6a, a follower gear 6b, an actuator 7, a worm 8, a hydraulic cylinder 9, a piston 9a, a piston rod 9b, a pressure measuring hole 10 and a differential pressure flowmeter 11.
Detailed Description
The utility model will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
The present invention provides an axial flow control valve, comprising: the valve comprises a valve body, a valve core, a valve seat and a driving device; the valve core is fixedly arranged in the valve body, an annular fluid channel is formed between the valve core and the valve body, the valve seat is tubular and is connected to the inner wall of the valve body in a sealing mode, the valve body, the valve core and the valve seat are coaxially arranged, and the driving device is used for driving the valve seat to move along the axial direction of the valve body so as to be connected with or separated from the valve core, so that the flow control valve is closed or opened.
The axial flow type flow control valve drives the valve seat to move through the driving device, so that the valve seat is connected with or separated from the valve core, and the flow control valve is closed or opened. The problems of unstable integral shape line of the throttling piece, flow separation, flow resistance increase and the like caused by the movement of the driving valve core of the driving device in the prior art are solved.
Example 1
Fig. 1 shows a schematic structural view of an axial flow control valve according to a first exemplary embodiment of the present invention. As shown in fig. 1, an axial flow control valve includes: the valve comprises a valve body 1, a valve core 2, a valve seat 4 and a driving device; the valve core 2 is fixedly arranged in the valve body 1, an annular fluid channel is formed between the valve core 2 and the valve body 1, the valve seat 4 is tubular and is connected to the inner wall of the valve body 1 in a sealing mode, the valve body 1, the valve core 2 and the valve seat 4 are coaxially arranged, and the driving device is used for driving the valve seat 4 to move along the axial direction of the valve body 1 so as to be connected with or separated from the valve core 2, so that the flow control valve is closed or opened.
The valve seat 4 is driven by the driving device to move, so that the valve seat 4 is connected with or separated from the valve core 2, and the flow control valve is closed or opened. The problems of unstable integral shape line of the throttling element, flow separation, flow resistance increase and the like caused by the movement of the driving valve core 2 by the driving device in the prior art are solved.
In this embodiment, the valve core 2 is spindle-shaped or drop-shaped, and includes a head portion, a middle portion and a tail portion connected in sequence according to the medium flowing direction (the direction indicated by the arrow in fig. 1), the axial section of the head portion is circular arc-shaped or parabolic, and the middle portion is a cylinder. The appearance of the valve core 2 is optimized, so that the flow resistance can be reduced to the greatest extent, and the rectification effect is ensured. When the medium flows through the valve element 2, almost no flow separation occurs, and thus adverse effects such as noise and vibration can be reduced. When the medium in the pipeline is liquid, the possibility of flash evaporation, cavitation and cavitation can be reduced.
The valve seat 4 is close to one end (tail end) of the valve core 2, the inner wall of the valve seat 4 is a smooth curved surface, and when the valve seat 4 is connected with the valve core 2, the inner wall of the valve seat 4 is tangent to the outer surface of the valve core 2, so that the control valve is closed. In this embodiment, the axial cross section of the inner wall of the valve seat 4 is circular arc, and the axial cross section of the inner wall of the valve seat 4 may be other smooth curved surfaces according to design requirements. The shape of the valve seat 4 is optimized, so that the flow resistance can be reduced to the greatest extent, and the damage to the whole flow field is avoided.
The valve core or the valve seat of the embodiment does not adopt a valve cage or similar design in the prior art, and the line shape of an axial flow passage in the valve body can not be damaged, so that the damage to the whole flow field is avoided.
The peripheries of two ends of the valve seat 4 are respectively provided with an annular sealing ring 5 so as to be in sealing connection with the inner wall of the valve body 1, and the medium is prevented from leaking between the valve seat 4 and the inner wall of the valve body 1.
The axial flow type flow control valve of this embodiment still includes a plurality of backing sheets 3, and a plurality of backing sheets 3 are along the circumference equipartition of case 2, and the one end of backing sheet 3 is connected in the periphery of case 2, and the other end is connected in the inner wall of valve body 1. The supporting sheet 3 firmly fixes the valve core 2 on the axis of the valve body 1, besides, no additional component is arranged on the valve core 2, and the adverse effect on the rectifying effect of the valve core 2 can be avoided.
The valve body 1 is in a circular tube shape, and two ends of the valve body can be respectively connected with a medium pipeline through flanges. In particular, a section of pipe with the same inner diameter as the controlled medium pipe can be used as the valve body 1. The driving device is arranged outside the valve body 1. The periphery of the valve seat 4 is provided with a rack, the driving device comprises an actuator 7 and a gear, the actuator 7 is used for driving the gear, and the gear is in transmission connection with the rack, so that the valve seat 4 can be driven to tightly attach to the inner wall of the valve body 1 to move along the axial direction of the valve body 1, the flow area between the valve seat 4 and the valve core 2 can be changed, and the flow in the valve body can be controlled. When the flow of a medium in the pipeline needs to be reduced, the gear is driven to rotate through the actuator 7, the valve seat 4 is driven to be close to the valve core 2 through the rack, the flow area between the valve seat 4 and the valve core 2 is gradually reduced at the moment, and the flow in the pipeline is also gradually reduced. When the valve seat 4 moves to a specific position, the inner wall of the valve seat 4 is tangent to the outer surface of the tail part of the valve core 2 (as shown by a dotted line in fig. 2), at this time, the valve is completely closed, and the flow in the pipeline is zero. On the contrary, the gear is driven to rotate by the actuator 7, the valve seat 4 is driven by the rack to be gradually far away from the valve core 2, the flow area between the valve seat 4 and the valve core 2 is gradually increased at the moment, and the flow in the pipeline is also gradually increased until the required flow is reached. In order to ensure that the valve seat 4 is stressed uniformly and acts stably when moving, more than one group of racks and gears can be uniformly distributed on the periphery of the valve seat 4, wherein one gear is a driving gear 6a and is connected with an actuator 7; the other gear is a follow-up gear 6b and is not connected with the actuator 7.
Due to the above-mentioned structural features, the axial flow control valve of the present embodiment has more desirable flow characteristics than the existing axial flow control valve, as shown in fig. 2 (data from prototype tests).
Example 2
Fig. 3 shows a schematic structural view of an axial flow control valve according to a second exemplary embodiment of the present invention. As shown in fig. 3, embodiment 2 differs from embodiment 1 only in that: the periphery of valve seat 4 is equipped with the screw thread, and drive arrangement includes executor 7 and worm 8, and executor 7 is used for driving screw 8, and worm 8 is connected with screw thread transmission. The worm 8 is driven by the actuator 7, and then the valve seat 4 is driven to move along the axial direction of the valve body 1 by clinging to the inner wall of the valve body 1, so that the flow area between the valve seat 4 and the valve core 2 is changed, and the flow in a pipeline is controlled. In order to ensure that the valve seat 4 is stressed uniformly and acts stably when moving, more than one group of worms can be uniformly distributed on the periphery of the valve seat 4, wherein one worm is a driving worm and is connected with an actuator 7; the other worms are follow-up worms and are not connected with the actuator 7.
Example 3
Fig. 4 shows a schematic structural view of an axial flow control valve according to a third exemplary embodiment of the present invention. As shown in fig. 4, embodiment 3 differs from embodiment 1 only in that: the driving device comprises an actuator 7 and a hydraulic cylinder 9 (or air cylinder), wherein the actuator 7 is used for driving a piston 9a of the hydraulic cylinder 9, and a piston rod 9b of the hydraulic cylinder 9 is connected with the periphery of the valve seat 4. The actuator 7 drives the piston rod 9b, so as to drive the valve seat 4 to cling to the inner wall of the valve body 1 to move along the axial direction of the valve body 1, so that the flow area between the valve seat 4 and the valve core 2 is changed, and the flow in a pipeline is controlled. When the flow of the medium in the pipeline needs to be reduced, the actuator 7 drives the piston rod 9b to further push the valve seat 4 to approach the valve core 2, at the moment, the flow area between the valve seat 4 and the valve core 2 is gradually reduced, and the flow in the pipeline is also gradually reduced. When the valve seat 4 moves to a specific position, the inner wall of the valve seat 4 is tangent to the outer surface of the tail part of the valve core 2, at the moment, the valve is completely closed, and the flow in the pipeline is zero. On the contrary, the actuator 7 drives the piston rod 9b to further push the valve seat 4 to be gradually away from the valve core 2, at the moment, the flow area between the valve seat 4 and the valve core 2 is gradually increased, and the flow in the pipeline is also gradually increased until the required flow is reached.
Example 4
Fig. 5 shows a schematic structural view of an axial flow control valve according to a fourth exemplary embodiment of the present invention. As shown in fig. 5, example 4 differs from example 1 only in that: the head and the tail of the valve core 2 are cones, the middle part is a cylinder, and the cone angle of the head is larger than that of the tail.
Example 5
Fig. 6 shows a schematic structural view of an axial flow control valve according to a fifth exemplary embodiment of the present invention. As shown in fig. 6, example 5 differs from example 1 only in that: the axial section of the head part of the valve core 2 is arc-shaped or parabola-shaped, the middle part is a cylinder, and the tail part and the head part have the same shape. This configuration may be used when bidirectional flow control is desired.
Example 6
Fig. 7 shows a schematic structural view of an axial flow control valve according to a sixth exemplary embodiment of the present invention. As shown in fig. 7, example 6 differs from example 1 only in that: the head and the tail of the valve core 2 are cones, the middle part is a cylinder, and the taper angle of the head is equal to that of the tail. This configuration may be used when bidirectional flow control is desired.
Example 7
Fig. 8 shows a schematic structural view of an axial flow control valve according to a seventh exemplary embodiment of the present invention. As shown in fig. 8, embodiment 7 differs from embodiment 1 in that:
the side wall of the valve body 1 is provided with a pressure measuring hole 10, which is a high pressure measuring hole and a low pressure measuring hole, wherein the high pressure measuring hole is close to one end of the valve core 2 facing the fluid inlet, preferably, the center of the high pressure measuring hole is tangent to the head of the valve core 2, and the low pressure measuring hole is close to the middle part of the valve core.
The flow control valve further comprises a differential pressure type flowmeter 11, wherein a high-pressure inlet end and a low-pressure inlet end of the differential pressure type flowmeter 11 are respectively connected with the high-pressure measuring hole and the low-pressure measuring hole to measure the flow. Specifically, when the medium in the pipeline flows through the valve core 2, due to the rectifying effect of the valve core 2, the fluid uniformly enters the annular fluid channel formed between the valve core 2 and the valve body 1, at the moment, the fluid flow speed is increased, the pressure is reduced, and a standard annular channel flow is formed. The instantaneous flow of the fluid in the pipeline is obtained by utilizing the pressure difference between the lower pressure in the annular channel and the higher pressure at the head part of the valve core 2 and after the transmission and the calculation processing of the differential pressure type flowmeter 11.
The driving device is connected with the differential pressure type flowmeter 11, and drives the valve seat 4 to move along the axial direction of the valve body 1 according to the flow measured by the differential pressure type flowmeter 11. Specifically, the driving device comprises an actuator 7 and a gear, the flow measured by the differential pressure type flowmeter 11 is transmitted to the actuator 7 as a feedback signal, and the actuator 7 can form closed-loop control between the flow of the pipeline and the movement of the valve seat according to the movement of the flow control valve seat 4, so that the flow of the medium in the pipeline can be accurately controlled.
When the flow measured by the differential pressure type flowmeter 11 is larger than the required flow, the flow of the medium in the pipeline needs to be reduced, the gear is driven by the actuator 7 to rotate, the valve seat 4 is driven by the rack to be close to the valve core 2, the flow area between the valve seat 4 and the valve core 2 is gradually reduced at the moment, and the flow in the pipeline is also gradually reduced until the required flow is reached. On the contrary, when the flow measured by the differential pressure type flowmeter 11 is smaller than the preset flow, the flow of the medium in the pipeline needs to be increased, the gear is driven by the actuator 7 to rotate, the valve seat 4 is driven by the rack to gradually keep away from the valve core 2, the flow area between the valve seat 4 and the valve core 2 is gradually increased at the moment, and the flow in the pipeline is also gradually increased until the required flow is reached.
The axial flow type flow control valve of the embodiment integrates flow measurement and control, and can realize a closed-loop control valve taking medium flow as a feedback signal.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. An axial flow control valve, comprising: the valve comprises a valve body, a valve core, a valve seat and a driving device; the valve body is tubular, the valve core is fixedly arranged in the valve body, and an annular fluid channel is formed between the valve core and the valve body; the valve seat is tubular and is hermetically connected to the inner wall of the valve body, and the valve body, the valve core and the valve seat are coaxially arranged; the driving device is used for driving the valve seat to move along the axial direction of the valve body so as to be connected with or separated from the valve core, and therefore the flow control valve is closed or opened.
2. The axial flow control valve of claim 1, wherein the spool includes a head, a middle, and a tail connected in series;
the valve core is spindle-shaped or drop-shaped, the axial section of the head part is arc-shaped or parabolic, and the middle part is a cylinder; or the axial section of the head part is arc-shaped or parabolic, the middle part is a cylinder, and the tail part and the head part are in the same shape.
3. The axial flow control valve of claim 1, wherein the valve core comprises a head portion, a middle portion and a tail portion connected in sequence, the head portion and the tail portion are conical, the middle portion is cylindrical, and a taper angle of the head portion is greater than or equal to a taper angle of the tail portion.
4. The axial flow control valve of claim 1, wherein the valve seat is adjacent to one end of the valve element, and an inner wall of the valve seat is a smooth curved surface;
when the valve seat is connected with the valve core, the inner wall of the valve seat is tangent to the outer surface of the valve core.
5. The axial flow control valve of claim 1, wherein the valve seat is provided at the outer circumference of both ends thereof with an annular sealing ring, respectively, so as to be sealingly coupled with the inner wall of the valve body.
6. The axial flow control valve of claim 1, wherein the drive means is disposed outside the valve body; the periphery of the valve seat is provided with a rack, the driving device comprises an actuator and a gear, the actuator is used for driving the gear, and the gear is in transmission connection with the rack.
7. The axial flow control valve of claim 1, wherein the drive means is disposed outside the valve body; the periphery of the valve seat is provided with threads, the driving device comprises an actuator and a worm, the actuator is used for driving a screw, and the worm is in transmission connection with the threads.
8. The axial flow control valve of claim 1, wherein the drive means is disposed outside the valve body; the driving device comprises an actuator and an air cylinder or an oil hydraulic cylinder, the actuator is used for driving a piston of the air cylinder or the oil hydraulic cylinder, and a piston rod of the air cylinder or the oil hydraulic cylinder is connected with the periphery of the valve seat.
9. The axial flow control valve of claim 1, further comprising a plurality of support pieces, the support pieces being evenly distributed along a circumferential direction of the valve element, one end of each support piece being connected to an outer circumference of the valve element, and the other end being connected to an inner wall of the valve body.
10. The axial flow control valve of claim 1, wherein a high pressure tap hole and a low pressure tap hole are formed in a sidewall of the valve body, the high pressure tap hole is near an end of the valve element facing the fluid inlet, and the low pressure tap hole is near a middle portion of the valve element;
the flow control valve also comprises a differential pressure type flowmeter, and a high-pressure inlet end and a low-pressure inlet end of the differential pressure type flowmeter are respectively connected with the high-pressure measuring hole and the low-pressure measuring hole so as to measure the flow;
the driving device is connected with the differential pressure type flowmeter, and the valve seat is driven to move along the axial direction of the valve body according to the flow measured by the differential pressure type flowmeter, so that closed-loop control is realized.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120749214.4U CN215861797U (en) | 2021-04-13 | 2021-04-13 | Axial flow control valve |
| PCT/CN2022/084702 WO2022218166A1 (en) | 2021-04-13 | 2022-04-01 | Axial-flow type flow control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120749214.4U CN215861797U (en) | 2021-04-13 | 2021-04-13 | Axial flow control valve |
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| Publication Number | Publication Date |
|---|---|
| CN215861797U true CN215861797U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120749214.4U Active CN215861797U (en) | 2021-04-13 | 2021-04-13 | Axial flow control valve |
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| CN (1) | CN215861797U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218166A1 (en) * | 2021-04-13 | 2022-10-20 | 南京亿准纳自动化控制技术有限公司 | Axial-flow type flow control valve |
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2021
- 2021-04-13 CN CN202120749214.4U patent/CN215861797U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218166A1 (en) * | 2021-04-13 | 2022-10-20 | 南京亿准纳自动化控制技术有限公司 | Axial-flow type flow control valve |
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