CN117739158A - Automatically-adjusted butterfly valve and working method thereof - Google Patents

Abstract

The application discloses automatically regulated's butterfly valve and method of operation thereof, it includes butterfly valve main part, butterfly valve subassembly and flow self-interacting subassembly, the butterfly valve main part forms a inlet, a liquid outlet and is arranged in the inlet with a liquid passageway between the liquid outlet, the butterfly valve subassembly includes volume regulating butterfly valve body and actuating member, wherein volume regulating butterfly valve body by set up in the liquid passageway, and be close to the inlet, and by rotatable connect in actuating member, flow self-interacting subassembly includes detection component and adjusting part, detection component is set up and is used for detecting the hydraulic pressure change of the liquid that gets into through the inlet, adjusting part is set up according to the result of detection component detection and automatic steady adjustment the hydraulic pressure change of the liquid that the inlet got into.

Description

Automatically-adjusted butterfly valve and working method thereof

Technical Field

The invention relates to a valve body, in particular to an automatically-adjusted butterfly valve and a working method thereof.

Background

Valve bodies are particularly common in the field of mechanical automation. In the industry, valves are classified into different types according to the valve core shape of the valve body or the driving mode of the valve body. For example, the valve body may be classified into a ball valve, a butterfly valve, and the like according to the form of a valve element in the valve body. The valve body can be classified into a pneumatic valve or an electric valve according to the driving mode of the valve body.

Ball valves are typically used to change the direction of fluid flow, while butterfly valves are typically used to regulate the flow of fluid. Existing butterfly valves typically include a valve body and an actuator for driving the valve body. The valve body is disposed within the passageway of the butterfly valve body for adjusting the size of the passageway formed by the butterfly valve body. The actuator is used for driving the valve body to rotate so that the valve body adjusts the size of a channel formed by the butterfly valve body.

However, in practical use, particularly when an existing butterfly valve is used in a hydraulic system, when the butterfly valve is driven by an actuator, there is a momentary fluctuation in the flow rate of fluid within the butterfly valve, so that the flow rate of fluid flowing out through the butterfly valve has a large fluctuation. Whereas for some hydraulic systems a smooth change in flow is critical for the stability of the hydraulically driven mechanism.

In order to solve such a problem, in the prior art, a fluid is generally divided into a plurality of branches, a flow meter is disposed on a total path through which the fluid flows to monitor a change in flow rate, and then a solenoid valve capable of being automatically controlled according to the flow rate detected by the preceding flow meter is disposed on a subsequent branch through which the fluid flows. As a result, the structure of the entire hydraulic system tends to be complicated.

Disclosure of Invention

An advantage of the present invention is to provide a self-regulating butterfly valve and method of operating the same, wherein the self-regulating butterfly valve includes a flow self-regulating assembly by which the hydraulic pressure of the fluid flowing therethrough can be automatically adjusted according to the change in flow rate, thereby reducing the instantaneous magnitude of fluctuation in hydraulic pressure and thus making the overall hydraulic system change more smooth.

Another advantage of the present invention is to provide a self-regulating butterfly valve and a method of operating the same, wherein the self-regulating flow rate assembly is capable of automatically regulating the opening of the outlet according to the magnitude of rotation of the valve body provided at the inlet, thereby making the flow of liquid from the self-regulating butterfly valve smoother.

To achieve at least one of the above advantages, the present invention provides a self-adjusting butterfly valve comprising:

the butterfly valve comprises a butterfly valve body, a liquid inlet and a liquid outlet, and a liquid channel between the liquid inlet and the liquid outlet;

the butterfly valve assembly comprises a quantity-adjusting butterfly valve body and a driving member, wherein the quantity-adjusting butterfly valve body is arranged in the liquid channel, is close to the liquid inlet and is rotatably connected with the driving member; and

the flow self-adjusting assembly comprises a detection assembly and an adjusting assembly, wherein the detection assembly is used for detecting the hydraulic change of liquid entering through the liquid inlet, and the adjusting assembly is used for automatically and stably adjusting the hydraulic change of the liquid entering through the liquid inlet according to the detection result of the detection assembly.

According to an embodiment of the present invention, the detection assembly includes a moving member and a rotation gear and an encoder, the butterfly valve body is provided with a pressure measuring channel along a radial direction perpendicular to a liquid flowing direction between the valve body of the butterfly valve and the liquid outlet, wherein the pressure measuring channel is provided in communication with the liquid channel, the moving member has a sliding rod portion and a rack portion, the flow self-adjusting assembly includes a return spring fitted over the sliding rod portion, the sliding rod portion is slidably provided in the pressure measuring channel and keeps sealing with an inner wall forming the pressure measuring channel, the rack portion is provided with a plurality of teeth arranged along the radial direction perpendicular to the liquid flowing direction, the rotation gear is provided rotatably mounted to the butterfly valve body and located outside the liquid channel, the rotation gear is engaged with the rack portion, the adjustment assembly includes a controller and a driving unit controlled by the controller and a pressure adjusting valve body rotatably connected to the driving unit, the butterfly valve body is provided close to the liquid outlet and driven by the controller to rotate the butterfly valve body.

According to an embodiment of the invention, the flow self-adjusting assembly comprises a detection assembly and an adjustment assembly, the detection assembly comprises a moving member and a rotating gear, the butterfly valve body is also provided with the pressure measuring channel along a radial direction perpendicular to the liquid flowing direction at a position between the valve body of the quantity adjusting butterfly valve and the liquid outlet, wherein the pressure measuring channel is arranged to be communicated with the liquid channel, and the moving member is provided with a sliding rod part and a rack part. The flow self-adjusting assembly comprises a reset spring sleeved on the sliding rod part, and the adjusting assembly comprises a transmission gear component and a pressure-adjusting butterfly valve body. The transmission gear member includes a first helical gear, a second helical gear, a first gear shaft and a second gear shaft and a plurality of spur gears, the first helical gear and one of the spur gears being coaxially mounted to the first gear shaft, wherein the first gear shaft is rotatably mounted to the butterfly valve body through bearings. The straight gear arranged on the first gear shaft is meshed with the rack part, when the moving part slides up and down along the pressure measuring channel, the straight gear arranged on the first gear shaft can rotate, so that the first helical gear is driven to rotate, the second helical gear is meshed with the first helical gear, the second helical gear is arranged on the second gear shaft, one straight gear is arranged on the second gear shaft, the axial direction of the second gear shaft is arranged along the radial direction perpendicular to the fluid flowing into the liquid channel, and the straight gear is arranged on the valve rod of the pressure regulating butterfly valve body, so that the regulating butterfly valve body can be synchronously driven to rotate along with the sliding of the moving part along the pressure measuring channel.

According to an embodiment of the present invention, the maximum travel of the moving member moving up and down corresponds to the condition that the valve body of the adjusting butterfly valve is fully opened and tends to fully close the liquid outlet, respectively.

According to an embodiment of the present invention, an upper step and a lower step are formed in the inner wall of the pressure measuring channel, wherein when the moving member slides toward the liquid channel, the step of the lower portion of the inner wall of the pressure measuring channel is provided to prevent the moving member from sliding out of the pressure measuring channel, and the step liquid of the lower portion of the inner wall of the pressure measuring channel is provided to prevent the moving member from sliding out of the pressure measuring channel.

According to one embodiment of the invention, the return spring is sleeved on the sliding rod part of the moving part, and in a compression-maintaining manner, the bottom end is abutted on the protrusion of the sliding rod part, and the top end is abutted on the step at the top of the inner wall of the pressure measuring channel.

According to an embodiment of the invention, the bottom of the sliding rod is arranged to extend into the liquid channel and is embodied as a bevel and directed towards the liquid flowing in from the liquid inlet.

According to an embodiment of the invention, the drive member is implemented as a motor.

According to the embodiment of the invention, the joint of the first gear shaft and the butterfly valve main body is provided with a bearing. Also preferably, a bearing is provided at the connection of the second gear shaft and the butterfly valve body.

To achieve at least one of the above objects, according to another aspect of the present invention, there is provided a method of operating a self-adjusting butterfly valve, the method comprising:

detecting a hydraulic pressure change of the liquid entering through the liquid inlet;

and the hydraulic pressure change of the liquid entering the liquid inlet is automatically and stably adjusted according to the detection result of the detection component.

Drawings

Fig. 1 shows a perspective view of a first embodiment of a self-regulating butterfly valve according to the invention.

Fig. 2 shows another angular perspective view of a first embodiment of the self-adjusting butterfly valve of the invention.

Fig. 3 shows a perspective view of the structure of the self-adjusting butterfly valve part according to the invention.

Fig. 4 shows a side view of the self-adjusting butterfly valve of the invention in perspective view as shown in fig. 3.

Fig. 5 shows a perspective view of a portion of the structure of the self-adjusting butterfly valve of fig. 4, in section view in direction A-A.

Fig. 6 shows a perspective view of a second embodiment of the self-regulating butterfly valve according to the invention.

Fig. 7 shows another angular perspective view of a second embodiment of the self-adjusting butterfly valve of the invention.

Fig. 8 is a perspective view showing a part of the construction of a second embodiment of the self-adjusting butterfly valve according to the invention.

FIG. 9 illustrates a side view of the self-adjusting butterfly valve of the present invention in perspective view as shown in FIG. 8.

FIG. 10 shows a cross-sectional view in the direction B-B of a partial structural perspective view of the self-adjusting butterfly valve depicted in FIG. 9.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present invention.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

Referring to fig. 1-5, a self-adjusting butterfly valve in accordance with a preferred embodiment of the invention is described in detail below, wherein the self-adjusting butterfly valve includes a butterfly valve body 10, a butterfly valve assembly 20, and a flow self-regulating assembly 30.

Specifically, the butterfly valve body 10 forms a liquid inlet 101, a liquid outlet 102, and a liquid passage 103 between the liquid inlet 101 and the liquid outlet 102.

The butterfly valve assembly 20 includes a quantity-adjusting butterfly valve body 21 and a driving member 22, wherein the quantity-adjusting butterfly valve body 21 is disposed in the liquid passage 103, adjacent to the liquid inlet 101, and rotatably connected to the driving member 22 so as to be driven to rotate by the driving member 22, thereby enabling the liquid inlet 101 to be switched between a state of being closed and a state of being opened at an arbitrary opening degree.

It should be noted that the valve body 21 of the quantity adjusting butterfly valve is preferably configured as a disk. When the plane of the valve body 21 of the quantity adjusting butterfly valve is driven by the driving member 22 to be parallel to the liquid inlet direction of the liquid inlet 101, the opening degree of the valve body 21 of the quantity adjusting butterfly valve is the largest.

It is worth mentioning that the driving member 22 may be implemented as a motor, a rotary cylinder/hydraulic cylinder or the like. Preferably implemented as an electric motor. In order to enable those skilled in the art to understand the present invention, at least one embodiment of the present invention is described with respect to the driving member 22 being implemented as a motor only, and those skilled in the art will appreciate that this is not a limitation of the present invention.

Further, in one embodiment, the flow self-regulating assembly 30 includes a detection assembly 31 and an adjustment assembly 32. The detecting unit 31 is configured to detect a change in the hydraulic pressure of the liquid entering through the liquid inlet 101, and the adjusting unit 32 is configured to automatically and smoothly adjust the change in the hydraulic pressure of the liquid entering through the liquid inlet 101 according to the result detected by the detecting unit 31.

Specifically, in this embodiment, the detecting unit 31 includes a moving member 311, a rotating gear 312, and an encoder 313.

More specifically, the butterfly valve body 10 is provided with a pressure measuring passage 104 in a radial direction perpendicular to the liquid flowing direction at a position between the quantity adjusting butterfly valve body 21 and the liquid outlet 102, wherein the pressure measuring passage 104 is provided in communication with the liquid passage 103.

The moving member 311 has a sliding rod portion 3111 and a rack portion 3112. The flow self-regulating assembly 30 includes a return spring 33 that is sleeved on the sliding stem 3111.

The sliding rod 3111 is slidably disposed in the pressure measurement channel 104 and maintains a seal with an inner wall forming the pressure measurement channel 104.

The rack portion 3112 includes a plurality of teeth arranged along the radial direction perpendicular to the direction in which the liquid flows. The rotation gear 312 is rotatably mounted to the butterfly valve body 10 and is located outside the liquid passage 103. The rotation gear 312 is engaged with the rack portion 3112.

As will be appreciated by those skilled in the art, when the metering butterfly valve body 21 is driven to rotate momentarily by the drive member 22, the flow rate of fluid that has flowed from the inlet 101 into the fluid passage 103 will change momentarily.

When the flow rate of the fluid changes, the moving member 311 is driven to move along the extending direction of the pressure measuring channel 104 due to the change of the hydraulic pressure of the fluid between the liquid outlet 102 and the valve body 21 of the volume adjusting butterfly valve, and then the rack portion 3112 drives the rotating gear 312 to rotate. The encoder 313 is provided to the rotation shaft of the rotation gear 312, and can detect the magnitude of the rotation gear 312.

The adjusting assembly 32 includes a controller 321, a driving unit 322 controlled by the controller 321, and a pressure-regulating butterfly valve body 323 drivingly and rotatably connected to the driving unit 322.

The pressure-regulating butterfly valve body 323 is disposed near the liquid outlet 102, and after being driven to rotate by the driving unit 322, the pressure-regulating butterfly valve body 323 can control the opening degree of the liquid outlet 102.

As will be appreciated by those skilled in the art, when the automatically regulated butterfly valve is used to regulate a hydraulic line, as the driving member 22 is driven to rotate the valve body 21 of the regulating butterfly valve by a predetermined angle so that the opening degree of the inlet 101 increases, the instantaneous flow rate of hydraulic fluid into the fluid passage 103 of the butterfly valve body 10 through the inlet 101 increases, and at this time, the instantaneous oil pressure increases, and therefore, the mover 311 will be driven by the instantaneously increased oil pressure to move in the radial direction perpendicular to the fluid flow direction, and the return spring 33 is compressed. Accordingly, the rotation gear 312 will be rotated a predetermined number of turns, and the encoder 313 will be able to detect the magnitude of the rotation gear 312, and then form a corresponding electrical signal. The controller 321 is configured to acquire the electric signal and then control the driving unit 322 to slowly increase the opening degree of the liquid outlet 102 according to the electric signal. In this way, the instantaneously increased oil pressure is at least partially converted into the kinetic energy of the moving member 311 and the elastic potential energy of the return spring 33, thereby reducing the influence of the instantaneous oil pressure variation on the overall oil pressure. In addition, since the driving unit 322 slowly increases the opening degree of the liquid outlet 102, a part of the liquid pressure interposed between the quantity adjusting butterfly valve body 21 and the pressure adjusting butterfly valve body 323 is slowly discharged from the liquid outlet 102. In this way, the oil pressure of the entire hydraulic system is only slowly and smoothly changed.

In contrast, when the automatically regulated butterfly valve is used to regulate a hydraulic line, as the driving member 22 is driven to rotate the valve body 21 of the regulating butterfly valve by a predetermined angle, so that when the opening degree of the intake port 101 is reduced, the flow rate of hydraulic fluid into the liquid passage 103 of the butterfly valve body 10 through the intake port 101 is reduced, and at this time, the instantaneous oil pressure is reduced, and therefore, the mover 311 is driven by the instantaneously reduced oil pressure to move toward the liquid passage 103 in the radial direction perpendicular to the liquid flow direction, and the return spring 33 is reduced in compression. Accordingly, the rotation gear 312 will be rotated a predetermined number of turns, and the encoder 313 will be able to detect the magnitude of the rotation gear 312, and then form a corresponding electrical signal. The controller 321 is configured to acquire the electric signal and then control the driving unit 322 to slowly decrease the opening degree of the liquid outlet 102 according to the electric signal. In this way, the moving member 311 moves along the pressure measuring channel 104 toward the liquid channel 103, so as to push part of the liquid in the pressure measuring channel 104 into the liquid channel 103, thereby reducing the influence of the instantaneous oil pressure change on the overall oil pressure. In addition, since the driving unit 322 slowly decreases the opening degree of the liquid outlet 102, a portion of the liquid pressure between the quantity adjusting butterfly valve body 21 and the pressure adjusting butterfly valve body 323 slowly decreases. In this way, the oil pressure of the entire hydraulic system is only slowly and smoothly changed.

Referring to fig. 6-9, in another embodiment of the present invention, the flow self-regulating assembly 30 includes a sensing assembly 31A and an adjustment assembly 32A.

In this embodiment, the detecting assembly 31A includes a moving member 311A and a rotating gear 312A.

The pressure measuring channel 104 is also provided in the butterfly valve body 10 at a position between the valve body 21 and the liquid outlet 102 in a radial direction perpendicular to the liquid flowing direction, wherein the pressure measuring channel 104 is provided in communication with the liquid channel 103.

The moving member 311A has a slide shaft portion 3111A and a rack portion 3112A. The flow self-regulating assembly 30A includes a return spring 33A that is sleeved on the sliding stem 3111A.

The adjustment assembly 32A includes a drive gear member 321 and a pressure regulating butterfly valve body 322A. The transmission gear member 321 includes a first helical gear 3211, a second helical gear 3212, a first gear shaft 3213, a second gear shaft 3214, and a plurality of spur gears 3215.

The first helical gear 3211 and one of the spur gears 3215 are coaxially mounted to the first gear shaft 3213, wherein the first gear shaft 3213 is rotatably mounted to the butterfly valve body 10 through a bearing. The spur gear 3215 provided on the first gear shaft 3213 is engaged with the rack part 3112 so that the spur gear 3215 provided on the first gear shaft 3213 can rotate to drive the first helical gear 3211 to rotate when the mover 311 slides up and down along the pressure measuring channel 104.

The second helical gear 3212 is meshed with the first helical gear 3211, and the second helical gear 3212 is provided to the second gear shaft 3214, wherein one of the spur gears 3215 is provided to the second gear shaft 3214, and an axial direction of the second gear shaft 3214 is provided along a radial direction perpendicular to a flow of fluid into the liquid passage 103.

The valve rod of the pressure regulating butterfly valve body 322A is provided with the spur gear 3215, so that the pressure regulating butterfly valve body 322A can be synchronously driven to rotate along with the sliding of the moving member 311 along the pressure measuring channel 104.

As will be appreciated by those skilled in the art, as in the above-described embodiment, when the automatically-adjusted butterfly valve is used to adjust the hydraulic line, as the driving member 22 is driven to rotate the adjustable butterfly valve body 21 by a predetermined angle so that the opening degree of the intake port 101 increases, the flow rate of hydraulic fluid entering the fluid passage 103 of the butterfly valve body 10 through the intake port 101 increases, and at this time, the instantaneous oil pressure increases, and therefore, the moving member 311 is driven by the instantaneously-increased oil pressure to move in the radial direction perpendicular to the fluid flow direction, and the return spring 33 is compressed. Accordingly, the spur gear 3215 provided to the first gear shaft 3213 in the transmission gear member 321 is to be transmitted to be rotated. Subsequently, the first helical gear 3211 mounted to the first gear shaft 3213 is rotated, thereby rotating the second helical gear 3212. Accordingly, the second gear shaft 3214 will rotate around a radial direction perpendicular to the fluid flow into the liquid channel 103.

Accordingly, the valve body 322A of the pressure-regulating butterfly valve is rotated by a predetermined amount by the transmission of the spur gear 3215, thereby slowly increasing the opening degree of the liquid outlet 102. In this way, the instantaneously reduced oil pressure is at least partially converted into the kinetic energy of the moving member 311 and the elastic potential energy of the return spring 33, thereby reducing the influence of the instantaneous oil pressure variation on the overall oil pressure. In addition, since the driving unit 322 slowly increases the opening degree of the liquid outlet 102, a part of the liquid pressure interposed between the quantity adjusting butterfly valve body 21 and the pressure adjusting butterfly valve body 322 is slowly discharged from the liquid outlet 102. In this way, the oil pressure of the entire hydraulic system is slowly and smoothly changed.

It should be noted that, when the liquid pressure in the liquid channel 103 is at a preset pressure, the plane of the valve clack of the pressure-regulating butterfly valve body 322A forms a preset angle with the axial direction of the liquid channel 103, so that when the liquid pressure in the liquid channel 103 instantaneously deviates from the preset pressure, the valve clack of the pressure-regulating butterfly valve body 322A can be synchronously driven to rotate to instantaneously regulate the opening of the liquid outlet 102.

In contrast, when the automatically regulated butterfly valve is used to regulate a hydraulic line, as the driving member 22 is driven to rotate the valve body 21 of the regulating butterfly valve by a predetermined angle, so that when the opening degree of the intake port 101 is reduced, the flow rate of hydraulic fluid into the liquid passage 103 of the butterfly valve body 10 through the intake port 101 is reduced, and at this time, the instantaneous oil pressure is reduced, and therefore, the mover 311 is driven by the instantaneously reduced oil pressure to move toward the liquid passage 103 in the radial direction perpendicular to the liquid flow direction, and the return spring 33 is reduced in compression. The pressure regulating butterfly valve body 322A slowly decreases the opening of the liquid outlet 102. In this way, the moving member 311 moves along the pressure measuring channel 104 toward the liquid channel 103, so as to push part of the liquid in the pressure measuring channel 104 into the liquid channel 103, thereby reducing the influence of the instantaneous oil pressure change on the overall oil pressure. Further, since the pressure regulating butterfly valve body 322A slowly decreases the opening degree of the liquid outlet 102, a portion of the liquid pressure between the pressure regulating butterfly valve body 21 and the pressure regulating butterfly valve body 322A slowly decreases. In this way, the oil pressure of the entire hydraulic system is only slowly and smoothly changed.

It is worth mentioning that in this way the hydraulic pressure in the hydraulic system can be changed smoothly.

It should be noted that, in the present embodiment, the maximum stroke of the moving member 311 moving up and down corresponds to the position of the adjusting butterfly valve body 322A being fully opened (i.e. the plane of the valve flap of the adjusting butterfly valve body 322A is parallel to the axial direction of the liquid passage 103) and tending to fully close the liquid outlet 102. Preferably, in this embodiment, a bearing is disposed at the connection between the first gear shaft 3213 and the butterfly valve body 10. Also preferably, a bearing is provided at the connection between the second gear shaft 3214 and the butterfly valve body 10.

It should be noted that in any of the above embodiments, two steps are formed in the inner wall of the pressure measuring channel 104, as shown in fig. 5 and 10. When the moving member 311 slides toward the liquid passage 103, the step provided at the lower portion of the inner wall of the pressure measurement passage 104 can prevent the moving member 311 from sliding out of the pressure measurement passage 104. Also, the step liquid provided at the lower portion of the inner wall of the pressure measurement channel 104 can prevent the movable member 311 from sliding out of the pressure measurement channel 104. In other words, by these being two steps, the maximum stroke of the moving member 311 moving up and down can be further formed.

Preferably, the return spring 33 is sleeved on the sliding rod portion 3111 of the moving member 311, and in a manner of keeping compression, the bottom end abuts on the protrusion of the sliding rod portion 3111, and the top end abuts on the step at the top of the inner wall of the pressure measuring channel 104.

Preferably, the bottom of the sliding rod 3111 is configured to extend into the liquid channel 103 and is configured to be inclined toward the liquid flowing from the liquid inlet 101, so that the pressure formed by the oil pressure of the liquid can drive the moving member 311 to slide along the pressure measuring channel 104.

In accordance with another aspect of the present invention,

it will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.

Claims (10)

1. Automatically regulated butterfly valve, its characterized in that includes:

the butterfly valve comprises a butterfly valve body, a liquid inlet and a liquid outlet, and a liquid channel between the liquid inlet and the liquid outlet;

the butterfly valve assembly comprises a quantity-adjusting butterfly valve body and a driving member, wherein the quantity-adjusting butterfly valve body is arranged in the liquid channel, is close to the liquid inlet and is rotatably connected with the driving member; and

the flow self-adjusting assembly comprises a detection assembly and an adjusting assembly, wherein the detection assembly is used for detecting the hydraulic change of liquid entering through the liquid inlet, and the adjusting assembly is used for automatically and stably adjusting the hydraulic change of the liquid entering through the liquid inlet according to the detection result of the detection assembly.

2. The self-adjusting butterfly valve of claim 1, wherein the sensing assembly includes a moving member and a rotating gear and an encoder, the butterfly valve body defines a pressure measuring channel in a radial direction perpendicular to the direction of fluid flow between the butterfly valve body and the fluid outlet, wherein the pressure measuring channel is configured to communicate with the fluid channel, the moving member has a sliding stem and a rack, the flow self-adjusting assembly includes a return spring that is disposed over the sliding stem, the sliding stem is slidably disposed in the pressure measuring channel and maintains a seal with an inner wall defining the pressure measuring channel, the rack defines a plurality of teeth aligned in the radial direction perpendicular to the direction of fluid flow, the rotating gear is configured to be rotatably mounted to the butterfly valve body and is located outside the fluid channel, the rotating gear is engaged with the rack, the adjusting assembly includes a controller and a drive unit controlled by the controller and a drive unit that is rotatably connected to the sliding stem, the sliding stem is slidably disposed in the pressure measuring channel and maintains a seal with an inner wall defining the pressure measuring channel, the rack is configured to rotatably mount the butterfly valve body along the radial direction perpendicular to the direction of fluid flow, and the rotating gear is configured to rotatably drive the butterfly valve body adjacent to the fluid outlet.

3. The self-regulating butterfly valve of claim 1, wherein the flow self-regulating assembly includes a sensing assembly and an adjustment assembly, the sensing assembly including a moving member and a rotating gear, the butterfly valve body also providing the pressure sensing passageway in a radial direction perpendicular to the direction of fluid flow between the valve body and the fluid outlet, wherein the pressure sensing passageway is configured to communicate with the fluid passageway, the moving member having a sliding stem portion and a rack portion, the flow self-regulating assembly including a return spring nested on the sliding stem portion, the adjustment assembly including a drive gear member and a first pressure regulating butterfly valve body, the drive gear member including a first helical gear, a second helical gear, a first gear shaft and a second gear shaft and a plurality of spur gears, the first helical gear and the one spur gear being coaxially mounted to the first gear shaft, wherein the first gear shaft is rotatably mounted to the butterfly valve body via bearings, the spur gear shaft being disposed on the first gear shaft being engaged to the rack portion to move the helical gear shaft in the radial direction, the helical gear shaft being rotatably disposed on the first helical gear shaft and the valve body, the valve body being rotatably disposed on the second helical gear shaft in the radial direction, the helical gear shaft being rotatably disposed on the valve body, the first helical gear shaft being rotatably mounted to the valve body, the one of the spur gear shaft being rotatably disposed on the first helical gear shaft and the valve body in the radial direction, the one of the helical gear shaft being rotatably disposed in the first helical gear shaft and being rotatable in the axial direction, and the valve body being disposed down the first helical gear, and being rotatable valve body, so that the valve body of the adjusting butterfly valve can be synchronously driven to rotate along with the sliding of the moving piece along the pressure measuring channel.

4. A self-regulating butterfly valve according to claim 3, wherein the maximum travel of the moving member up and down corresponds to the valve body of the regulating butterfly valve being fully open and tending to fully close the outlet, respectively.

5. The self-adjusting butterfly valve of any one of claims 2 to 4, wherein an upper step and a lower step are formed in an inner wall of the pressure measurement channel, wherein the step of a lower portion of the inner wall of the pressure measurement channel is provided to prevent the moving member from sliding out of the pressure measurement channel, and the step liquid of the lower portion of the inner wall of the pressure measurement channel is provided to prevent the moving member from sliding out of the pressure measurement channel when the moving member slides toward the liquid channel.

6. The self-adjusting butterfly valve of claim 5, wherein the return spring is sleeved on the sliding stem of the moving member and is held in compression with a bottom end abutting against a projection of the sliding stem and a top end abutting against a step at the top of the pressure measurement channel inner wall.

7. The self-adjusting butterfly valve of any one of claims 2 to 4, wherein the bottom of the sliding stem is configured to extend into the fluid passage and is implemented as a ramp and directed toward the fluid flowing from the fluid inlet.

8. The self-adjusting butterfly valve of claim 1, wherein the drive member is implemented as a motor.

9. The self-adjusting butterfly valve of claim, wherein a bearing is provided at a junction of the first gear shaft and the butterfly valve body, and a bearing is provided at a junction of the second gear shaft and the butterfly valve body.

10. A method of operating a butterfly valve based on self-adjustment according to any one of claims 1 to 9, comprising:

detecting a hydraulic pressure change of the liquid entering through the liquid inlet;

and the hydraulic pressure change of the liquid entering the liquid inlet is automatically and stably adjusted according to the detection result of the detection component.