CN111561580B

CN111561580B - Axial flow type control valve

Info

Publication number: CN111561580B
Application number: CN201910125317.0A
Authority: CN
Inventors: 王乐; 袁杰; 秦晓娟
Original assignee: Fisher Jeon Gas Equipment Chengdu Co Ltd
Current assignee: Fisher Jeon Gas Equipment Chengdu Co Ltd
Priority date: 2019-02-14
Filing date: 2019-02-14
Publication date: 2023-08-29
Anticipated expiration: 2039-02-14
Also published as: CN111561580A

Abstract

The present application provides an axial flow control valve, wherein the axial flow control valve includes: a valve body; the gear box is arranged inside the valve body; the first isolation part is arranged in the valve body and provided with a first hole; the screw rod is arranged in the valve body and penetrates through the first hole to be connected with the gear box; wherein the first isolation member isolates the gearbox from fluid inside the valve body. The application solves the problem that the reliability of the axial flow control valve is poor due to the fact that transmission mechanisms such as a gear box and the like are easy to corrode in the related art, and achieves the effect of improving the reliability.

Description

Axial flow type control valve

Technical Field

The application relates to the field of valves, in particular to an axial flow control valve.

Background

The axial flow control valve is generally composed of an axial flow valve body and a piston type shutoff element arranged at the central axis position in the axial flow valve body, and the size of the shutoff surface area is regulated by controlling the piston or the valve plug to linearly move along the axis, so that the purposes of controlling flow and pressure are achieved.

The axial flow control valve has the advantages of large flow capacity, low pressure loss, stable fluid state, easy installation of silencing accessories and the like. However, since the piston type intercepting element is installed inside the valve body and moves in the axial direction of the valve body, in order to drive the valve plug to move, it is necessary to change the movement direction or manner and transmit the driving force provided by an actuator installed outside the valve body to the valve plug through a set of transmission mechanisms.

A transmission mechanism is typically disposed within the valve body to drive movement of the valve plug. When the transmission mechanism is contacted with the working gas with harmful gas and impurities, the transmission mechanism is corroded and worn, and the problems of impurity accumulation and the like are caused; however, when isolating the transmission from the working gas, the unbalanced forces from the pressure differential may in turn impede the movement of the valve plug.

In the related art, there are different types of transmission mechanisms, for example, the following transmission mechanisms may be employed in the valve body: a double-helical-rack staggered transmission mechanism, a gear-rack transmission mechanism, a built-in gear box transmission mechanism and the like.

In the related art, a valve body with a built-in gear box transmission mechanism adopts a top-mounted structure to directly embed a gear box in the valve body and a working medium, the flow area of the valve body is reduced, the flow capacity is smaller, and the gear box can be continuously corroded by harmful gas and is easy to damage.

Disclosure of Invention

In order to solve the problems, the application provides an axial flow control valve.

An axial flow control valve comprising: a valve body; a gear box arranged inside the valve body; a first isolation member disposed inside the valve body, the first isolation member having a first hole disposed thereon; the screw rod is arranged in the valve body and penetrates through the first hole to be connected with the gear box; wherein the first isolation member isolates the gearbox from fluid inside the valve body.

Preferably, the axial flow control valve further comprises: the support piece is arranged on the outer surface of the screw rod sleeve, the screw rod sleeve is arranged on the outer surface of the screw rod, the support piece is connected with the first isolation part, and the axis of the support piece is the same as the axis of the screw rod.

Preferably, the support comprises an end portion connected to the first spacer member and an extension portion which is a hollow cylinder and has a cross-section of greater diameter than that of the extension portion.

Preferably, the extension is provided with a pressure hole, which penetrates through the side wall of the extension.

Preferably, a boss is provided on an outer surface of the extension, the boss being closer to the fluid inlet of the axial flow control valve than the pressure hole.

Preferably, the support and the first spacer are integrally provided.

Preferably, the axial flow control valve further comprises: a first seal ring disposed between the valve body and the first isolation member; and/or a second sealing ring is arranged between the first isolation component and the supporting piece.

Preferably, the screw rod sleeve comprises a closed end and an open end, wherein a second hole and a hole plug are arranged on the closed end, and the second hole extends along the axial direction of the screw rod sleeve; wherein, in the working state of the axial flow control valve, the hole plug is tightly matched with the second hole.

Preferably, the axial flow control valve further comprises: a gasket disposed outside the valve body and detachably connected to a fluid inlet end of the axial flow control valve; wherein the inner diameter of the gasket is matched with the caliber of the fluid inlet of the axial flow control valve.

Preferably, the first spacer member includes a cylindrical cavity, wherein one end of the first spacer member is sealed and the first aperture is disposed on the sealed end of the first spacer member and the gearbox is disposed within the cylindrical cavity of the first spacer member.

Preferably, the first isolating member has a groove provided on an outer surface thereof; the outer surface of the driving shaft of the gear box is provided with a guide sleeve which can be clamped into the groove and matched with the groove; the input shaft of the gear box is connected with the driving shaft through a mounting hole arranged on the groove.

Preferably, the axial flow control valve further comprises: and the second isolation part is arranged outside the valve body and on the outer surface of the driving shaft of the gear box, and the axis of the second isolation part is the same as the axis of the driving shaft.

Preferably, the axial flow control valve further comprises: a first thrust bearing, and/or a second thrust bearing; wherein the first thrust bearing is arranged on the screw rod and is contacted with the first isolation component; the second thrust bearing is arranged on the driving shaft and is accommodated in the guide sleeve, and the second thrust bearing is in contact with the second isolation part.

Preferably, the axial flow control valve further comprises: the flow regulating sleeve is arranged in the valve body and is matched with the bearing frame in the valve body; the flow regulating sleeve regulates the flow in the valve body by regulating the opening size of the window on the carrier.

Preferably, at least one support leg is fixedly arranged on the flow regulating sleeve, and each support leg comprises a first end and a second end; the first end is connected with the inner surface of the flow regulating sleeve, and the second end is connected with a hollow round table clamped on the screw rod sleeve; the at least one supporting leg can drive the flow adjusting sleeve to move along the axial direction of the screw rod when the screw rod sleeve moves.

Preferably, the number of the support legs is more than two; each supporting leg is provided with a concave part; each of the recesses extends from a surface of the first end toward a fluid inlet side of the axial flow control valve along an axial direction of the lead screw sleeve.

Preferably, the support legs are evenly distributed circumferentially on the inner surface of the flow regulating sleeve.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

FIG. 1 is a schematic axial cross-sectional view of one embodiment of an axial flow control valve according to the present application;

FIG. 2 is an exploded view, partially broken away, of the internal structure of one embodiment of an axial flow control valve according to the present application;

FIG. 3 is a schematic view, partially broken away, of one embodiment of a first isolation member of an axial flow control valve according to the present application;

FIG. 4 is a schematic view in partial cutaway of one embodiment of a support for an axial flow control valve according to the present application;

FIG. 5 is a schematic view in partial cutaway of one embodiment of a flow regulating sleeve of an axial flow control valve according to the present application.

Detailed Description

The application will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

The present application provides an axial flow control valve, and fig. 1 is a schematic structural view of an axial section of one embodiment of an axial flow control valve according to the present application. An axial flow control valve, as shown in fig. 1, comprising: a valve body 100; a gear case 110 disposed inside the valve body 100; a first isolation member 120 disposed inside the valve body, the first isolation member 120 being provided with a first hole 121; a screw 130 disposed inside the valve body 100, and the screw 130 is connected with the gear case 110 through the first hole 121; wherein the first isolation member 120 isolates the gear case 110 from the fluid inside the valve body (also referred to as the space where the screw 130 is located is in communication with the fluid channel 131 inside the valve body 100, and the first isolation member 120 isolates the gear case 110 from the fluid channel 131).

In this solution, the first isolating member provides axial positioning for the entire valve cartridge assembly, while providing a base for the installation of the gearbox (and associated drive shaft, etc.) and provides a static sealing surface when in contact with other components, isolating the gearbox from the fluid (or fluid passage) inside the valve body, thereby isolating the gearbox from the working medium and avoiding corrosion of the gearbox by harmful media and impurities. In addition, under the technical scheme, the transmission mechanism such as the gear box is not easy to corrode or damage, the reliability of the axial flow type control valve is improved, and the gear box or other parts in the valve do not need to be replaced frequently, so that the top-mounted opening is not needed to be arranged on the valve body to replace or put in the gear box and other parts. In this technical scheme, when arranging the gear box in the valve body, avoided because set up the problem that top mounted type opening occupy the flow area in the valve, the throughput reduces to the flow area in the valve has been saved, little to throughput influence.

By the technical scheme provided by the application, the problem that the reliability of the axial flow type control valve is poor due to the fact that transmission mechanisms such as a gear box and the like are easy to corrode in the related art is solved, and the effect of improving the reliability of the axial flow type control valve is achieved.

As a preferred embodiment, the axial flow control valve, as shown in fig. 1, further includes: the support 140 is disposed on the outer surface of the screw sleeve 132, the screw sleeve is disposed on the outer surface of the screw 130, the support 140 is connected with the first spacer 120, and the axis of the support 140 is the same as the axis of the screw 130. Under this embodiment, first isolation component installs in the valve body, is connected with support piece for first isolation component is fixed better, and stability is better in the valve body course of working, and the leakproofness is also better.

As another preferred embodiment, the screw rod in the axial flow control valve may be a sliding screw rod, which has a self-locking function, and can be self-locked when the machine fails, thereby improving the safety of the production process.

As another preferred embodiment, as shown in fig. 2 and 4, the support 240 may include an end portion 241 and an extension portion 242, the end portion 241 may be connected with the first partition member 220, the extension portion 242 is a hollow cylinder, and a diameter of a cross section of the end portion 241 is larger than a diameter of a cross section of the extension portion 242. In this embodiment, the support can support the screw better in the axial direction of the axial flow type control valve, preventing the screw from tilting.

As another preferred embodiment, the extension 242 may be provided with a pressure hole 243, the pressure hole 243 penetrating through a sidewall of the extension 242. In this embodiment, the side wall of the extension 242 of the support 240 is provided with a pressure hole, and the pressure inside and outside the extension of the support is adjusted so that the pressure between the screw and the screw sleeve is balanced when the screw and the screw sleeve move in the extension; in addition, through the embodiment, the bearing areas of the inner part of the flow sleeve and the fluid inlet end are equal, balance is maintained, and unbalanced force does not exist; and the pressure (fluid pressure) in and out of the cylinder of the extension part is balanced, so that the axial flow control valve can move more smoothly in the working process of the screw rod and the like.

As another preferred embodiment, a boss 244 may be provided on the outer surface of the extension 242, the boss 244 being closer to the fluid inlet of the axial flow control valve (such as the fluid inlet 101 shown in fig. 1) than the pressure hole 243. In the embodiment, the fluid flowing into the support member from the fluid inlet direction flows through the boss and then flows into the pressure hole, the boss has a blocking effect on impurities or sediments in the fluid, and impurities in the fluid are prevented from flowing into the pressure hole, so that the axial flow type control valve can move more smoothly in the working process of the screw rod and the like.

As another preferred embodiment, the support and the first spacer member may be integrally provided. Under this embodiment, the structure of the subassembly is simpler in the valve, and processing, the installation of product are more convenient, and the leakproofness is better.

As another preferred embodiment, the axial flow control valve, as shown in fig. 1, may further include: a first seal ring 115 disposed between the valve body 100 and the first spacer 120; and/or a second seal ring 125 disposed between the first spacer 120 and the support 140. According to the embodiment, in the axial flow control valve, the isolation sealing effect between the fluid (or the fluid channel) in the valve body and the space where the transmission mechanism such as the gear box is located is better, the corrosion caused by the gear box or the transmission mechanism is prevented, and the transmission mechanism such as the gear box can be better protected.

As another preferred embodiment, as shown in fig. 5, the screw sleeve 232 may include a closed end 234 and an open end 236, wherein the closed end 234 is provided with a second hole 237 and a hole plug 238, and the second hole (or referred to as an oil filling hole) extends along the axial direction of the screw sleeve 232; wherein, in the working state of the axial flow control valve, the hole plug is tightly matched with the second hole. Wherein in this embodiment the closed end is closer to the end of the fluid inlet of the valve body than said open end. In this embodiment, the plug is in close fit with the second bore in the operating state of the axial flow control valve; the plug may be removable from the second bore when injection of lubricant (e.g., lubricating oil, etc.) into the lead screw sleeve is desired (the plug may be separated from the second bore when injection of lubricant is desired).

As another preferred embodiment, the axial flow control valve, as shown in fig. 1, further includes: a gasket 102 provided outside the valve body 100 and detachably connected to one end of the fluid inlet 101 of the axial flow type control valve of the valve body 100; wherein the inner diameter of the gasket 102 is adapted to the caliber of the fluid inlet of the axial flow control valve. According to the embodiment, the valve body of the axial flow control valve is arranged on a pipeline through the gasket, so that on-line maintenance in the production process is facilitated, for the axial flow control valve used on line, lubricant and the like can be injected into the valve body through the gasket in an on-line disassembly mode, and the replacement of the sealing element in the valve body is also more convenient; in this embodiment, the use, maintenance, etc. of the axial flow control valve are facilitated.

As another preferred embodiment, as shown in fig. 2, the first spacer member 220 comprises a cylindrical interior cavity, wherein one end 221 of the first spacer member 220 is sealed and a first aperture 222 is provided in the sealed end 221 of the first spacer member, and the gear housing 210 may be disposed within the cylindrical interior cavity 223 of the first spacer member 220. In this embodiment, the gear box can be accommodated in the cavity (or referred to as accommodating cavity) of the first isolation component and connected with the screw rod through the first hole on the sealed end of the first isolation component, and this structure has a supporting effect on the gear box, provides a base for mounting the gear box, and simultaneously enables the transmission mechanism such as the gear box to be better isolated from the fluid channel, so that the gear box is prevented from being contacted with the fluid (or working medium), the sealing effect is better, and corrosion of the gear box by harmful mediums and impurities is avoided.

FIG. 3 is a schematic view, partially broken away, of one embodiment of a first isolation member of an axial flow control valve according to the present application. As another preferred embodiment, as shown in fig. 3, a groove 324 is provided on the outer surface of the first spacer member; a guide sleeve (as shown in fig. 1, a guide sleeve 161 is arranged on the outer surface of the driving shaft 160 of the gear box 110) is arranged on the outer surface of the driving shaft of the gear box, and the guide sleeve can be clamped into the groove 324 and matched with the groove 324; the input shaft of the gearbox (input shaft 170 connected to the gearbox as shown in fig. 1) is connected to the drive shaft through mounting holes provided in the grooves (mounting holes 226 are provided in the grooves 224 of the first spacer member 220 as shown in fig. 2). Under this embodiment, the uide bushing can closely block into in the recess, and the drive shaft passes through the mounting hole on the recess and is connected with the input shaft, and the input shaft is connected to the gear box again, and during the installation, can fix a position the uide bushing. Through this embodiment, the uide bushing card is gone into in the recess, and then fixes a position the drive shaft, and drive shaft and uide bushing are inseparabler with first isolation component's connection. Preferably, the groove is a U-shaped open groove.

As another preferred embodiment, the axial flow control valve, as shown in fig. 1, may further include: the second spacer 150 is disposed outside the valve body 100 and on an outer surface of the driving shaft 160 of the gear case 110 (or, in other words, the driving shaft 160 of the axial flow type control valve), and an axis of the second spacer 150 is identical to an axis of the driving shaft 160. In the embodiment, the axial flow control valve adopts a double isolation sealing mode, and when the first isolation sealing mode fails, the axial flow control valve can still work normally due to the existence of the second isolation seal. By the embodiment, the reliability of the valve is improved, the protection of dangerous media is enhanced, and the damage of the media leakage to the environment is avoided.

As another preferred embodiment, the axial flow control valve, as shown in fig. 1, may further include: a first thrust bearing, and/or a second thrust bearing; wherein a first thrust bearing 136 (shown in fig. 1) may be disposed on the lead screw and in contact with the first isolation member 120; a second thrust bearing 166 may be provided on the drive shaft 160 and housed within the guide sleeve 161, the second thrust bearing 166 being in contact with the second spacer member 150. In this embodiment, thrust bearings (first thrust bearing, and/or second thrust bearing) are provided on the screw and/or the drive shaft, so that during operation of the axial flow control valve, an unbalanced force of the valve stem (referred to as the drive shaft or screw) is transmitted to the valve body, which receives an axial force generated by the installation, so that the unbalanced force during operation does not affect the input torque.

As another preferred embodiment, the axial flow control valve, as shown in fig. 2, may further include: a flow adjustment sleeve 280, the flow adjustment sleeve 280 being disposed within the valve body, the flow adjustment sleeve 280 being disposed in cooperation with a shelf 290 within the valve body; flow adjustment sleeve 280 adjusts the flow within the valve body by adjusting the size of the opening of window 291 on carrier 290. In this embodiment, due to the movement of the flow rate adjustment sleeve, a position change is generated between the flow rate adjustment sleeve and the window of the carrier, so that the window on the carrier is gradually opened or closed (i.e., the window into which the fluid of the axial flow type control valve flows), thereby increasing or decreasing the flow rate of the fluid inside the valve body (or, in other words, the flow rate inside the fluid channel), and achieving the effect of adjusting the flow rate of the fluid inside the axial flow type control valve.

As another preferred embodiment, as shown in fig. 2 and 5, the flow adjustment sleeve 280 may be fixedly provided with at least one support leg 281, each support leg 281 including a first end 284 and a second end 286; the first end 284 may be connected to the inner surface 282 of the flow adjustment sleeve, and the second end 286 is connected to a hollow circular truncated cone 288 (a schematic structure of the hollow circular truncated cone is shown in the drawings, which is partially cut away) that is clamped to the screw sleeve 232 (the screw sleeve 232 disposed on the outer surface of the screw 230, and the axial direction of which is the same as that of the screw); the at least one support leg 281 is capable of moving the flow adjustment sleeve along the axial direction of the screw 230 when the screw sleeve 232 is moved. Under the embodiment, the rotary motion is converted into linear motion through the screw rod and the screw rod sleeve, the screw rod sleeve moves to drive the hollow round platform clamped on the screw rod sleeve to move so as to drive the supporting leg to move along the linear motion, the flow regulating sleeve moves in the valve body along with the movement of the supporting leg, so that the size of a window on the bearing frame is regulated, and the flow of fluid in the valve body is regulated; in addition, in the embodiment, the flow regulating mode is simpler to realize, does not occupy too much fluid channel space, and has little influence on the flow capacity of the valve body.

As another preferred embodiment, as shown in fig. 2 and 5, the number of the support legs 281 may be two or more, each of which is provided with a recess 283, each recess 283 extending from a surface of the first end 284 (i.e., a surface of each support leg 281 near one end of the flow adjustment sleeve) toward the fluid inlet side of the axial flow type control valve (i.e., a direction in which the fluid inlet 101 is located, as shown in fig. 1) along the axial direction of the screw sleeve 232 (i.e., an axial direction of the flow adjustment sleeve). Under this embodiment, can assemble on the flow control sleeve and hoist and mount, in the hoist and mount in-process, can with hoist and mount area etc. embedding each concave part in, hoist and mount process is safer, and hoist and mount area is difficult for the slippage, adopts the supporting leg more than two for hoist and mount process is more balanced, and the installation is safer.

In this embodiment, each support leg is provided with a recess, and the recess may be provided at the first end or the second end, and each recess extends along the axial direction of the screw sleeve toward the fluid inlet side of the axial flow control valve; the concave part on the supporting leg can be formed by extending a boss from the edge and can also be formed by digging (arranging) a groove on the surface of the supporting leg. Preferably, each concave part is arranged at the first end, so that the concave parts are simpler to arrange, the space of the screw rod sleeve is not occupied, the space in the flow adjusting sleeve is saved, and in the hoisting process, the hoisting belt is placed more conveniently.

As another preferred embodiment, the support legs may be evenly distributed circumferentially on the inner surface of the flow regulating sleeve. In this embodiment, the supporting legs are uniformly distributed on the inner surface of the flow regulating sleeve along the circumferential direction (or more than two supporting legs are symmetrically distributed on the inner surface of the flow regulating sleeve relative to the axis of the screw sleeve), so that the concave parts on the supporting legs are uniformly distributed along the circumferential direction of the inner surface of the flow regulating sleeve, the stress on the flow regulating sleeve in all directions is more uniform in the lifting process, the lifting balance is better, the valve inner parts are not easy to be damaged in the lifting process, and the safety is higher.

It should be noted that the foregoing only shows a part of the preferred embodiments of the axial flow control valve, and those skilled in the art may apply the foregoing embodiments in combination according to actual application needs. For example, as a preferred embodiment, the axial flow control valve may include the following embodiments: a first isolation member and a flow adjustment sleeve; wherein the gearbox may be disposed within the cavity of the first isolation member; the flow regulating sleeve can regulate the flow in the valve body by regulating the opening size of the window on the bearing frame. The technical effects of the preferred embodiment are the same as those described above, and will not be described again.

By the above embodiments, an axial flow control valve is provided. Through the technical scheme, the following technical effects are achieved: the problem that the reliability of the axial flow control valve is poor due to the fact that the gear box is easy to corrode in the related art is solved, and the effect of improving the reliability of the axial flow control valve is achieved; the gear box is arranged on the valve body, and the rotary motion is converted into the linear motion required by the valve plug through the mechanisms such as the screw rod, the screw rod sleeve and the like; the gear box and the screw rod mechanism can be integrally arranged in the valve body from the valve port, a top-mounting opening is not required to be arranged on the valve body, and the influence on the flow capacity of the valve body is small; the working medium is isolated from the transmission gear box by the first isolating component (and the sealing ring, etc.), so that the corrosion of harmful medium and impurities to the gear box is avoided; the unbalanced force of the valve rod (referred to as a driving shaft or a screw rod) is transmitted to the valve body through the arrangement of the first thrust bearing and/or the second thrust bearing, and the valve body only bears the axial force generated by installation, so that the unbalanced force in the working process does not influence the input moment, and the performance of the valve body is more stable and reliable in the working process; by adopting double isolation and sealing, under severe working conditions, after the first isolation and sealing fail, the second isolation and sealing can still ensure the normal operation of the valve, thereby improving the reliability of the product and protecting dangerous media and avoiding the damage of the media leakage to the environment; the axial flow valve body input end is suitable for multi-rotation electric, hydraulic, electrohydraulic and pneumatic actuators, and can be matched with a mechanical travel indicator, so that the whole height of the valve is smaller.

It should be noted that these technical effects are not possessed by all the above embodiments, and some technical effects are attained by some preferred embodiments.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. An axial flow control valve, comprising:

a valve body;

a gear box arranged inside the valve body;

a first isolation member disposed inside the valve body, the first isolation member having a first hole disposed thereon;

the screw rod is arranged in the valve body and penetrates through the first hole to be connected with the gear box; and

a support coupled to the first spacer member to secure the first spacer member within the valve body, the support including an end portion coupled to the first spacer member and having a diameter greater than a diameter of the extension portion,

wherein the first isolation member isolates the gearbox from fluid inside the valve body.

2. The axial flow control valve according to claim 1, wherein,

the support piece is arranged on the outer surface of the screw rod sleeve, the screw rod sleeve is arranged on the outer surface of the screw rod, and the axis of the support piece is the same as the axis of the screw rod.

3. The axial flow control valve according to claim 2, wherein,

the extension is a hollow cylinder.

4. The axial flow control valve of claim 1, wherein the extension is provided with a pressure hole extending through a sidewall of the extension.

5. The axial flow control valve of claim 4, wherein a boss is provided on an outer surface of the extension, the boss being closer to a fluid inlet of the axial flow control valve than the pressure orifice.

6. The axial flow control valve according to claim 2, wherein,

the support and the first spacer member are integrally provided.

7. The axial flow control valve of claim 1, further comprising:

a first seal ring disposed between the valve body and the first isolation member; and/or the number of the groups of groups,

and the second sealing ring is arranged between the first isolation part and the supporting piece.

8. The axial flow control valve according to claim 2, wherein,

the screw rod sleeve comprises a closed end and an open end, a second hole and a hole plug are arranged on the closed end, and the second hole extends along the axial direction of the screw rod sleeve;

wherein, in the working state of the axial flow control valve, the hole plug is tightly matched with the second hole.

9. The axial flow control valve according to any one of claims 1 to 8, further comprising:

a gasket disposed outside the valve body and detachably connected to a fluid inlet end of the axial flow control valve;

wherein the inner diameter of the gasket is matched with the caliber of the fluid inlet of the axial flow control valve.

10. The axial flow control valve of any one of claims 1-8, wherein the first isolation member includes a cylindrical interior cavity, wherein one end of the first isolation member is sealed and the first bore is disposed on the sealed end of the first isolation member, and the gearbox is disposed within the cylindrical interior cavity of the first isolation member.

11. The axial flow control valve of claim 10, wherein the valve is configured to control the flow of the fluid,

a groove is formed in the outer surface of the first isolation part;

the outer surface of the driving shaft of the gear box is provided with a guide sleeve which can be clamped into the groove and matched with the groove;

the input shaft of the gear box is connected with the driving shaft through a mounting hole arranged on the groove.

12. The axial flow control valve of claim 11, further comprising:

and the second isolation part is arranged outside the valve body and on the outer surface of the driving shaft of the gear box, and the axis of the second isolation part is the same as the axis of the driving shaft.

13. The axial flow control valve of claim 12, further comprising: a first thrust bearing; and/or a second thrust bearing;

the first thrust bearing is arranged on the screw rod and is contacted with the first isolation part; the second thrust bearing is arranged on the driving shaft and is accommodated in the guide sleeve, and the second thrust bearing is in contact with the second isolation part.

14. The axial flow control valve according to any one of claims 2 to 8, further comprising:

the flow regulating sleeve is arranged in the valve body and is matched with the bearing frame in the valve body;

the flow regulating sleeve regulates flow within the valve body by regulating the opening size of a window on the carrier.

15. The axial flow control valve of claim 14, wherein the valve is configured to control the flow of fluid,

at least one supporting leg is fixedly arranged on the flow regulating sleeve, and each supporting leg comprises a first end and a second end;

the first end is connected with the inner surface of the flow regulating sleeve, and the second end is connected with a hollow round table clamped on the screw rod sleeve;

the at least one supporting leg can drive the flow adjusting sleeve to move along the axial direction of the screw rod when the screw rod sleeve moves.

16. The axial flow control valve of claim 15,

the number of the supporting legs is more than two;

each supporting leg is provided with a concave part;

each of the recesses extends from a surface of the first end toward a fluid inlet side of the axial flow control valve along an axial direction of the lead screw sleeve.

17. The axial flow control valve of claim 16, wherein the support legs are evenly circumferentially distributed on the inner surface of the flow adjustment sleeve.