CN110701315A - Butterfly valve and butterfly valve device - Google Patents

Abstract

The invention discloses a butterfly valve and a butterfly valve device. The butterfly valve comprises a valve seat, a valve core and a rotating shaft fixedly arranged on the valve core, wherein the valve seat comprises a base and a valve body assembly which is assembled on the base in a floating mode. The valve body assembly is provided with a valve hole, and at least part of the inner wall surface of the valve hole is provided with an inner right conical surface and a section contour line which is vertical to the central line of the valve hole is circular. The rotating shaft is rotatably assembled on the base and drives the valve core to rotate relative to the valve hole, the valve core is installed in the valve hole, an outer positive conical surface matched with the inner positive conical surface is arranged on the outer side wall of the valve core, and the center line of the valve core and the rotating center line of the rotating shaft are eccentric for a preset distance. The matching surface of the valve seat and the valve core is a positive conical surface, so that the machining precision is high, and the matching performance is good. When the valve core is sealed on the valve seat, the valve body component floats relative to the base, so that the outer positive conical surface of the valve core is sealed and attached to the inner positive conical surface of the valve hole, the matching allowance is good, and the sealing tightness is high.

Description

Butterfly valve and butterfly valve device

Technical Field

The invention relates to the technical field of valves, in particular to a butterfly valve and a butterfly valve device.

Background

In the related art, a triple offset butterfly valve includes a valve seat, a valve core, and a driving shaft fixed to the valve core, wherein a rotation center line of the driving shaft is deviated from a top surface of the valve core by a predetermined distance. The valve seat is provided with a valve hole, and the center line of the valve core and the center line of the valve hole deviate from a preset distance and do not coincide. And the wall surface of the valve hole is provided with a taper and a conical surface is not a positive conical surface so as to form an eccentric curved surface.

Therefore, the triple offset butterfly valve has three offset, and the inner wall surface of the valve hole is set to be a non-positive conical surface, so the machining precision is low, the matching is poor, and the product yield is low and the cost is high. The sealing effect at the connecting part of the driving shaft and the valve seat is poor, and liquid guided by the butterfly valve is easy to permeate into the gap between the driving shaft and the valve seat, so that the butterfly valve is corroded or seeps out of the butterfly valve, and other parts are corroded or polluted.

Disclosure of Invention

The invention aims to provide a butterfly valve and a butterfly valve device.

In order to achieve the purpose, the invention adopts the technical scheme that:

the first aspect of the present disclosure: the butterfly valve comprises a valve seat, a valve core and a rotating shaft fixedly arranged on the valve core, wherein the valve seat comprises a base and a valve body assembly which is assembled on the base in a floating mode, the valve body assembly is provided with a valve hole, at least part of the inner wall surface of the valve hole is provided with an inner positive conical surface, the cross section contour line perpendicular to the central line of the valve hole is circular, the rotating shaft is rotatably assembled on the base and drives the valve core to rotate relative to the valve hole, the valve core is arranged on the valve hole, the outer side wall of the valve core is provided with an outer positive conical surface matched with the inner positive conical surface, and the central line of the valve core and the rotating central line of the rotating;

the rotating shaft drives the valve core to rotate towards a first direction under the driving of external force, the valve core rotates relative to the valve body assembly and opens the valve hole, and the valve body assembly elastically resets;

the rotating shaft drives the valve core to rotate towards a second direction under the driving of external force, the valve core rotates relative to the valve body assembly and pushes the valve body assembly to move relative to the valve seat, the outer positive conical surface of the valve core is in sealing fit with the inner positive conical surface of the valve hole, and the central line of the valve core is overlapped with the axis of the valve hole.

Optionally, the valve body assembly is axially floating and/or radially floating relative to the valve bore.

Optionally, the valve body assembly includes a locking member assembled to the base, a valve body ring, and an elastic pad, the elastic pad is disposed between the locking member and the valve body ring and at least a portion of the elastic pad is elastically deformed, the valve body ring abuts against the base under the elastic force of the elastic member, and the valve hole is opened in the valve body ring.

Optionally, the valve body assembly further includes a first floating ring installed on the base, the elastic pad and the first floating ring are respectively disposed on two sides of the valve body ring, and the valve core abuts against the valve body ring and pushes the elastic pad and/or the first floating ring to elastically deform.

Optionally, the valve body assembly further includes a second floating ring installed on the base, the second floating ring is sleeved on the outer peripheral wall of the valve body ring, and the valve element abuts against the valve body ring and pushes the second floating ring and/or the elastic pad to deform elastically.

Optionally, the locking member includes a support ring fixedly disposed on the base and two or more adjusting members spaced apart from the support ring, and the adjusting members abut against the elastic pad.

Optionally, the base includes a main body portion and an assembling portion protruding from the main body portion, the main body portion is provided with a flow hole, the assembling portion protrudes toward a center direction of the flow hole, a minimum outer contour dimension of the flow hole is larger than a maximum inner diameter of the valve hole, and the valve body assembly is assembled to the assembling portion.

Optionally, the valve core comprises a plate body portion and a boss portion protruding from one side surface of the plate body portion, the rotating shaft is fixedly connected to the boss portion, and the outer positive conical surface is annularly arranged on the outer peripheral wall of the plate body portion.

Optionally, the valve seat further includes a sealing assembly installed in the base and sleeved on the rotating shaft, and the rotating shaft is connected with the base in a sealing manner through the sealing assembly.

The second aspect of the present disclosure: there is provided a butterfly valve device comprising a drive assembly and a butterfly valve as described above, the drive assembly being connected to the rotary shaft to drive the valve element to rotate.

After adopting the structure, compared with the prior art, the invention has the advantages that:

the matching surface of the valve seat and the valve core is a positive conical surface, so that the machining precision is high, and the matching performance is good. When the valve core is sealed on the valve seat, the valve body component floats relative to the base, so that the outer positive conical surface of the valve core is sealed and attached to the inner positive conical surface of the valve hole, the matching allowance is good, and the sealing tightness is high.

Drawings

The invention is further illustrated with reference to the following figures and examples:

fig. 1 is a schematic perspective view of a butterfly valve according to the present invention.

Fig. 2 is a schematic sectional view of a butterfly valve according to the present invention.

Fig. 3 is an enlarged schematic view of a structure at a in fig. 2.

Fig. 4 is a schematic structural view of the valve core closed to the valve hole in the present invention.

Fig. 5 is a schematic structural view of the valve core opening part of the valve hole in the invention.

Fig. 6 is a structural view illustrating the valve core fully opening the valve hole in the present invention.

Fig. 7 is a schematic perspective view of the valve cartridge of the present invention.

Fig. 8 is a front view schematically showing the structure of the valve body of the present invention.

Fig. 9 is a schematic structural view of the butterfly valve device of the present invention.

In the figure: a valve seat 10; a valve body assembly 11; a locking member 111; a support ring 1111; an adjuster 1112; a resilient pad 112; a valve body ring 113; a first floating ring 114; a second floating ring 115; a base 12; a body portion 121; the fitting portion 122; a flow aperture 123; a driving section 124; a support portion 125; a sealing aperture 126; the rotation hole 127; a valve hole 13; a mounting member 14; a valve core 20; an outer right conical surface 21; a plate body portion 22; a boss portion 23; a first void-avoiding portion 24; a second void-avoiding portion 25; mounting holes 26; a rotating shaft 30; a first rotating shaft 31; a second rotating shaft 32; a seal assembly 40; a first abutment member 41; the first seal ring 42; a spacer ring 43; a second abutment 44; a second seal ring 45; a drive assembly 50.

Detailed Description

The following description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention.

Examples, see fig. 1-3: the butterfly valve includes a valve seat 10, a valve core 20, and a rotation shaft 30 fixed to the valve core 20, wherein the valve seat 10 includes a base 12 and a valve body assembly 11 float-mounted on the base 12. The valve body assembly 11 is provided with a valve hole 13, and the inner wall surface of at least part of the valve hole 13 is provided with an inner right conical surface and a section contour line which is vertical to the central line of the valve hole 13 is circular. The rotating shaft 30 is rotatably assembled on the base 12 and drives the valve core 20 to rotate relative to the valve hole 13, the valve core 20 is installed on the valve hole 13, an outer positive conical surface 21 matched with the inner positive conical surface is arranged on the outer side wall of the valve core 20, and the center line of the valve core 20 is eccentric with the rotation center line of the rotating shaft 30 by a preset distance. The rotating shaft 30 drives the valve core 20 to rotate towards the first direction under the driving of external force, the valve core 20 rotates relative to the valve body assembly 11 and opens the valve hole 13, and the valve body assembly 11 elastically resets. The rotating shaft 30 drives the valve core 20 to rotate towards the second direction under the driving of an external force, the valve core 20 rotates relative to the valve body assembly 11 and pushes the valve body assembly 11 to move relative to the valve seat 10, the external positive conical surface 21 of the valve core 20 is in sealing fit with the internal positive conical surface of the valve hole 13, and the central line of the valve core 20 is overlapped with the axis of the valve hole 13.

The valve hole 13 is opened in the valve body assembly 11 and penetrates through the valve body assembly 11, the whole valve hole 13 is a regular conical hole, and the inner wall surfaces of the valve hole 13 are all arranged into inner regular conical surfaces. The bore wall of the valve bore 13 forms a circular full circular contour in a transverse cross-section perpendicular to the centre line of the valve bore 13. The valve hole 13 forms a forward cone righting structure relative to the valve seat 10, and the inner forward cone surface of the valve hole 13 is convenient to process. Alternatively, the valve hole 13 is formed in a stepped hole shape in which a portion of a wall surface of the valve hole 13 that engages with the valve body 20 is formed as an inner normal tapered surface.

The taper of the outer positive conical surface 21 of the valve core 20 is the same as that of the inner positive conical surface of the valve hole 13, and the rotating shaft 30 drives the valve core 20 to rotate and enables the outer positive conical surface 21 of the valve core 20 to be attached to the inner positive conical surface of the valve hole 13, so that the sealing effect is good. The valve body assembly 11 is assembled on the base 12 in a floating mode, the valve core 20 rotates and pushes the valve body assembly 11 to move slightly, and if the moving amount is within the range of 0.05 mm-0.3 mm, the valve body assembly 11 is attached to the valve hole 13 of the valve seat 10 in a sealing mode. When the valve core 20 closes the valve hole 13, a resisting force is provided between the valve body assembly 11 and the valve core 20, so that the outer positive conical surface 21 of the valve core 20 and the inner positive conical surface of the valve hole 13 are tightly attached to each other, the sealing effect is good, and the reliability is high. Alternatively, the abutment force is an elastic force of the valve body assembly 11 acting on the valve spool 20.

The central line of the valve core 20 is the axis of the external right conical surface 21, the valve core 20 is attached to the valve hole 13, and the central line of the valve core 20 is overlapped with the axis of the valve hole 13, so that the sealing effect is good. The valve core 20 and the valve hole 13 are both provided with regular conical surfaces, and the hole wall contour line of the cross section of the valve hole 13 is in a regular circle shape, so that the valve hole 13 can be processed in a regular position, and the processing precision is high. Alternatively, the eccentricity between the center line of the rotation of the rotating shaft 30 and the center line of the valve element 20 is A, and A is larger than or equal to 1mm and smaller than or equal to 20 mm.

The rotating shaft 30 is fixedly disposed on the valve core 20 and can drive the valve core 20 to rotate, and a rotation center line of the rotating shaft 30 is perpendicular to a center line of the valve core 20 and deviates from the center line by a preset distance. When the rotary shaft 30 rotates in the first direction, the valve spool 20 is biased by the rotary shaft 30 and controls the opening of the valve hole 13. When the rotary shaft 30 rotates in the second direction, the valve body 20 is biased by the rotary shaft 30 and controls the valve hole 13 to be closed. Wherein, the first direction is opposite to the second direction. Alternatively, the rotation shaft 30 controls the valve core 20 to open by a predetermined angle by an external force. For example, the rotating shaft 30 is rotated by a motor, a solenoid valve, and other driving mechanisms or driving elements. The matching surface of the valve hole 13 of the valve body assembly 11 and the valve core 20 is a positive conical surface, so that the processing precision is high, and the integration is good. When the valve core 20 is sealed in the valve body assembly 11, the central line of the valve core 20 is superposed with the axis of the valve hole 13, the matching tightness is good, and the sealing effect is good.

See fig. 4-6 for illustration: in one embodiment, the valve body assembly 11 is axially floating and/or radially floating relative to the valve bore 13. The valve body assembly 11 is assembled on the base 12 in a floating mode, and the valve body assembly 11 moves slightly under the action of the pushing force of the valve core 20, so that the joint of the valve core 20 and the valve hole 13 is in sealing contact with a positive cone and a positive cone, and the sealing effect is good.

In one embodiment, the base 12 includes a main body 121 and a fitting portion 122 protruding from the main body 121, the main body 121 is provided with a flow hole 123, and the fitting portion 122 protrudes toward a center of the flow hole 123. The minimum outer size of the flow hole 123 is larger than the maximum inner diameter of the valve hole 13, and the valve body assembly 11 is assembled to the assembly portion 122. A stepped structure is formed between the fitting portion 122 and a bore wall of the flow bore 123, and the valve body assembly 11 is disposed in the flow bore 123 and fitted to the fitting portion 122.

Accordingly, there is a corresponding play between the valve body assembly 11 and the base 12, i.e., the valve body assembly 11 can be slightly moved relative to the base 12 to adjust the contact tightness of the positive cone mating portion between the valve hole 13 and the valve core 20. Optionally, there is a radially movable space between the valve body assembly 11 and the bore wall of the flow bore 123. Optionally, the valve body assembly 11 has an axial clearance with the flow bore 123.

In one embodiment, the valve body assembly 11 includes a locking member 111 assembled to the base 12, a valve body ring 113, and an elastic pad 112, wherein the elastic pad 112 is disposed between the locking member 111 and the valve body ring 113, and at least a portion of the elastic pad 112 is elastically deformed. The valve body ring 113 is in contact with the base 12 by the elastic force of the elastic member, and the valve hole 13 is opened in the valve body ring 113.

The valve body ring 113 is assembled to the base 12, and the elastic pad 112 is installed between the locking member 111 and the valve body ring 113. The locking member 111 abuts against the elastic pad 112, so that the elastic pad 112 is elastically deformed and pushes the valve ring 113 to abut against the base 12. Wherein the elastic pad 112 is made of an elastic material. When the valve core 20 is rotated and abutted to the valve body assembly 11, the valve body assembly 11 can slightly move relative to the base 12, so that the outer positive conical surface 21 of the valve core 20 and the inner positive conical surface of the valve hole 13 are abutted to each other, the tightness of a sealing part is kept, and the sealing effect is good. The valve body assembly 11 moves relatively under the slight change of the elastic pad 112, so that the valve core 20 can rotate or be in sealing fit with the valve seat 10, and the rotation flexibility is good. Alternatively, the resilient pad 112 may be provided as a resilient sealing ring or other cross-sectional shape. Optionally, an elastic pad 112 is disposed at the abutting surface of the base 12 and the valve body assembly 11.

In an embodiment, the valve body assembly 11 further includes a first floating ring 114 mounted on the base 12, the elastic pad 112 and the first floating ring 114 are respectively disposed on two sides of the valve body ring 113, and the valve spool 20 abuts against the valve body ring 113 and pushes the elastic pad 112 and/or the first floating ring 114 to elastically deform. The first floating ring 114 is an annular structure made of an elastic material. Specifically, a ring groove is formed in the mounting portion 122 of the base 12, and the first floating ring 114 is disposed in the ring groove. The first floating ring 114 and the elastic pad 112 are respectively arranged on two sides of the valve body ring 113, so that the axial movement space of the valve body ring 113 can be effectively adjusted.

Further, the valve body assembly 11 further includes a second floating ring 115 mounted on the base 12, the second floating ring 115 is sleeved on the outer peripheral wall of the valve body ring 113, and the valve element 20 abuts against the valve body ring 113 and pushes the second floating ring 115 and/or the elastic pad 112 to deform elastically. The second floating ring 115 is of an annular configuration made of an elastic material. Optionally, the second floating ring 115 is sleeved at the outer peripheral wall of the valve body ring 113 and located between the valve body ring 113 and the hole wall of the flow hole 123. Accordingly, when the valve body assembly 11 is subjected to a radial force from the valve element 20, the valve body assembly 11 can be moved slightly as a whole to bring the valve hole 13 into close contact with and seal the outer peripheral wall of the valve element 20.

In one embodiment, the locking member 111 includes a supporting ring 1111 fixed to the base 12 and two or more adjusting members 1112 mounted on the supporting ring 1111 at intervals, and the adjusting members 1112 abut against the elastic pad 112. A support ring 1111 is secured to the base 12 for mounting an adjuster 1112. The adjusting element 1112 abuts against the elastic pad 112 and pushes the elastic pad 112 to elastically deform, accordingly, the elastic force of the elastic pad 112 acts on the valve ring 113, so that the valve ring 113 is attached to the base 12 or the first floating ring 114, and the pressure adjustment is convenient. Alternatively, the adjustment 1112 is provided as a fastener threadedly attached to the support ring 1111.

See fig. 7-8 for illustration: alternatively, the valve core 20 includes a plate portion 22 and a boss portion 23 protruding from one side surface of the plate portion 22, the rotation shaft 30 is fixed to the boss portion 23, and the external regular conical surface 21 is disposed around the outer peripheral wall of the plate portion 22. The boss portion 23 protrudes from one side surface of the plate body portion 22 to form a boss or rib structure, and the rotation shaft 30 is fixed to the boss portion 23 such that the boss portion 23 is spaced apart from the other side surface of the plate body portion 22 by a predetermined distance to form an eccentricity amount.

The outer peripheral wall of the plate body 22 is formed into an outer regular conical surface 21, and the outer peripheral wall of the plate body 22 is convenient to process. Alternatively, the surface of the plate portion 22 is formed as a slope inclined from the center line of the valve body 20 so as to avoid an interference portion with the inner wall surface of the valve hole 13 during rotation of the valve body 20.

In an alternative embodiment, the plate portion 22 is a plate-shaped structure, the valve element 20 further includes a first space-avoiding portion 24 and a second space-avoiding portion 25, which are in a shape of a chamfer, the first space-avoiding portion 24 and the second space-avoiding portion 25 are respectively disposed at edges of two ends of the plate portion 22, and the plate portion 22 avoids an interference portion with an inner normal conical surface of the valve seat 10 during rotation of the valve element 20 through the first space-avoiding portion 24 and the second space-avoiding portion 25.

The first space-avoiding portion 24 and the second space-avoiding portion 25 are designed to be chamfered and located at the edge of the plate body portion 22, the first space-avoiding portion 24 is distributed at one end of the plate body portion 22, the second space-avoiding portion 25 is located at the other end of the plate body portion 22, and the plate body portion 22 is provided with a convex boss portion 23 at the end. The surface of the plate portion 22 is a plane perpendicular to the center line of the valve body 20, and the valve body 20 avoids an interference portion with the inner wall surface of the valve hole 13 by the first and second escape portions 24 and 25 during rotation of the valve body 20.

In an alternative embodiment, the first space-avoiding portions 24 are symmetrically distributed on the plate body portion 22 and the chamfer size of the first space-avoiding portions 24 gradually decreases from the first end to the other end of the symmetry axis, wherein the symmetry axis of the first space-avoiding portions 24 is perpendicular to the revolution center line of the rotation shaft 30. Alternatively, the second space-avoiding portions 25 are symmetrically distributed on the plate body portion 22 and the chamfer size of the second space-avoiding portions 25 is gradually decreased from the first end to the other end of the symmetry axis, wherein the symmetry axis of the second space-avoiding portions 25 is perpendicular to the revolution center line of the rotation shaft 30.

The symmetry axis of the first space-avoiding portion 24 is in the same plane as the symmetry axis of the second space-avoiding portion 25, and the rotation axis 30 is perpendicular to the plane. The symmetry axis has two intersection points with the edge of the first recess 24 in the plate body portion 22, including a first large end and a first small end, wherein the chamfer dimension of the first large end is greater than the chamfer dimension of the first small end. During the rotation of the valve core 20, the chamfer size of the first hollow-avoiding portion 24 gradually decreases from the first large end to the first small end, and the first large end of the first hollow-avoiding portion 24 is located in the direction of the valve core 20 rotating into the valve hole 13.

Accordingly, the symmetry axis has two intersection points with the edge of the second recess 25 in the plate body portion 22, including a second large end and a second small end, wherein the chamfer dimension of the second large end is greater than the chamfer dimension of the second small end. During the rotation of the valve core 20, the chamfer dimension of the second hollow-avoiding portion 25 gradually decreases from the second large end to the second small end, and the second large end of the second hollow-avoiding portion 25 is located in the direction in which the valve core 20 rotates out of the valve hole 13. And, the first and second large ends are provided at two opposite corners of the plate body portion 22.

In one embodiment, the boss portion 23 includes a rib protruding from the plate body portion 22, and the rotating shaft 30 is fixed to the rib with a predetermined distance between a center line of rotation of the rotating shaft 30 and a top surface of the plate body portion 22. The convex rib is a convex structure formed by locally protruding the surface of the plate body part 22, and the rotating shaft 30 is fixed at two ends of the convex rib, so that the connection is convenient. The boss portion 23 has a convex structure, so that the interference portion between the valve element 20 and the valve seat 10 during rotation is reduced, and the deflection effect is good. It should be noted that the valve body 20 may not be provided with the boss portion 23, and the rotation shaft 30 may be directly fixed to the plate portion 22 and may be offset from the surface of the plate portion 22 by a predetermined distance.

See fig. 1-3 for: in one embodiment, the rotating shaft 30 is detachably coupled to the valve core 20. The valve core 20 is provided with a mounting hole 26, the rotating shaft 30 is fixed in the mounting hole 26 and locked on the valve core 20 through a connecting piece such as a bolt and a fastener, and the rotating shaft 30 is convenient to mount. The assembly process of the valve core 20 is as follows: the valve body 20 is closed at the valve hole 13, the rotating shaft 30 penetrates the valve seat 10 and is inserted into the mounting hole 26, and is locked to the valve body 20 by a connector, and the mounting position between the valve body 20 and the valve seat 10 and the rotating shaft 30 is fixed.

Alternatively, the outer positive tapered surface 21 of the plate body portion 22 is in sealing engagement with the inner positive tapered surface of the valve seat 10, and the rotation shaft 30 penetrates through the valve seat 10 and is inserted into the boss portion 23, so that the valve element 20 can rotate relative to the valve seat 10 and control the opening or closing of the valve hole 13, and the operation flexibility is good.

The rotating shaft 30 is fixed to the valve core 20, wherein the rotating shaft 30 may be a unitary shaft penetrating the valve core 20. Alternatively, the rotating shaft 30 may be a separate structure including two rotating shafts coaxially disposed. In an embodiment, the rotating shaft 30 includes a first rotating shaft 31 and a second rotating shaft 32 coaxially disposed and fixed to the valve core 20, the first rotating shaft 31 penetrates the valve seat 10 and can drive the valve core 20 to rotate under the driving of an external force, and the second rotating shaft 32 is rotatably connected to the valve seat 10. The rotating shaft 30 is a split structure, and the first rotating shaft 31 and the second rotating shaft 32 are inserted from two ends of the valve seat 10 and connected to the valve core 20, so that the installation is convenient and the positioning accuracy is high.

In one embodiment, the valve seat 10 further includes a sealing member 40 installed in the base 12 and sleeved on the rotating shaft 30, and the rotating shaft 30 is connected to the base 12 by the sealing member 40 in a sealing manner. A seal assembly 40 is mounted within the base 12 for improving the seal between the valve seat 10 and the rotating shaft 30.

In one embodiment, the valve seat 10 defines a sealing hole 126, the sealing element 40 is inserted into the sealing hole 126, and the sealing element 40 elastically deforms and sealingly fits against the wall of the sealing hole 126 under the action of an external force.

The valve seat 10 is provided with a rotation hole 127 to which the rotation shaft 30 is fitted, the rotation hole 127 being in clearance fit with the rotation shaft 30. The sealing hole 126 is opened in the valve seat 10 and forms a stepped hole structure with the rotating hole 127, and the sealing assembly 40 is installed in the sealing hole 126 and elastically deforms under the action of an external force, so that the sealing assembly 40 seals a gap between the rotating shaft 30 and the sealing hole 126, and liquid guided by the valve body is prevented from permeating into the valve seat 10. The seal assembly 40 is elastically deformed by an external force, for example, an end cap is mounted on the valve seat 10, and the end cap pushes against the seal assembly 40 to be elastically deformed. Or, the rotating shaft 30 is provided with a lock nut, and the lock nut directly or indirectly abuts against the sealing component 40 and pushes the sealing component 40 to be elastically deformed.

In an alternative embodiment, the sealing assembly 40 includes at least one first sealing ring 42 sleeved on the rotating shaft 30 and a first abutting member 41 abutting against the first sealing ring 42, and the first sealing ring 42 is sealed on the hole wall of the sealing hole 126 under the thrust action of the first abutting member 41. The first sealing ring 42 is provided with one or more than one and is sequentially sleeved on the rotating shaft 30, the first sealing ring 42 at one end is abutted against the end face of the sealing hole 126, and the first abutting piece 41 is abutted against the first sealing ring 42 at the other end and pushes the first sealing ring 42 to be tightly attached to the rotating shaft 30 and the hole wall of the sealing hole 126. In an alternative embodiment, the first sealing ring 42 is made of an elastic material such as rubber. Optionally, the first sealing ring 42 is made of graphite or the like for blocking the penetration of liquid such as tar.

Alternatively, the first contact member 41 is configured as a sleeve, and the first contact member 41 is in contact with the first seal ring 42 by an external force. Alternatively, the first abutting member 41 is a flange-sleeve structure, and includes a cylindrical body portion abutting on the first sealing ring 42 and a flange portion disposed outside the valve seat 10 and slidably disposed on the screw. The screw is fixed to the valve seat 10, and a lock nut is mounted on the screw. The locking nut pushes the flange portion to move so that the barrel portion abuts against the first seal ring 42.

In an alternative embodiment, the seal assembly 40 further includes a spacer ring 43, the spacer ring 43 spacing the first seal ring 42 apart. The first sealing rings 42 are provided with two or more than two, and the spacing ring 43 is sleeved on the rotating shaft 30 and separates the plurality of first sealing rings 42 to form a first sealing part and a second sealing part. The spacer ring 43 can enlarge the sealing range of the sealing assembly 40, realize multi-section sealing, and has good sealing effect and high blocking efficiency. Alternatively, the spacer ring 43 is provided in a tubular structure, and a groove for reducing the contact area of the spacer ring 43 with the valve seat 10 and the rotating shaft 30 is provided on the outer side wall of the spacer ring 43.

In an embodiment, the seal hole 126 is provided as a stepped hole, and the seal assembly 40 further includes a second abutting member 44 and at least one second seal ring 45, wherein the second abutting member 44 pushes the at least one second seal ring 45 against a stepped surface of the stepped hole. The first seal ring 42 abuts against the second abutment member 44, and the outer diameter of the first seal ring 42 is smaller than the outer diameter of the second seal ring 45. The sealing hole 126 is provided with a multistage stepped hole structure, i.e., the sealing hole 126 and the rotating hole 127 are provided with a one-stage stepped structure, and further, the sealing hole 126 is provided with a stepped hole structure, and accordingly, a two-stage stepped hole structure is formed between the stepped hole and the rotating hole 127.

The outer diameter of the second sealing ring 45 is smaller than that of the first sealing ring 42, and accordingly, the diameter of the sealing hole 126 where the second sealing ring 45 is located is smaller than that of the sealing hole 126 where the first sealing ring 42 is located. The sealing assembly 40 extends from the valve seat 10 toward the valve core 20, and accordingly, the second sealing ring 45 is close to one side of the valve core 20 to realize a first sealing of the valve core 20. Alternatively, the second seal ring 45 is made of an elastic material such as rubber. Optionally, the second sealing ring 45 is made of graphite or the like for blocking the penetration of liquid such as tar. Alternatively, the second abutment member 44 is provided as a sleeve structure, which may be provided as a tubular structure or a flange-tubular structure.

In one embodiment, the flow aperture 123 is used to direct the fluid communication controlled by the valve body. Meanwhile, during the rotation of the valve spool 20, a portion of the valve spool 20 rotates into the flow hole 123. The flow hole 123 can be a circular hole or other hole type, and the smallest outer contour size of the flow hole 123 is larger than the largest inner diameter of the valve hole 13, so that the valve core 20 can be rotated into the flow hole 123 to avoid interference, and the processing is convenient.

The base 12 further includes a supporting portion 125 protruding from one side of the body portion 121 and a driving portion 124 protruding from the other side of the body portion 121, one end of the rotating shaft 30 is connected to the supporting portion 125 in an inserting manner, the other end of the rotating shaft penetrates through the driving portion 124 and extends outward, and the flow hole 123 penetrates through the body portion 121.

Flow apertures 123 extend through body portion 121 to allow valve cartridge 20 to rotate within flow apertures 123 and direct fluid flow along flow apertures 123. The support portion 125 and the driving portion 124 are respectively located at both ends of the flow hole 123 and support and define the rotation shaft 30, wherein the rotation shaft 30 is plug-connected to the support portion 125 and the end of the support portion 125 is sealed. The rotating shaft 30 penetrates through the driving portion 124 and extends outward, so that the rotating shaft 30 can be connected to a power mechanism, and the rotating shaft 30 drives the valve core 20 to rotate under the driving of the power mechanism.

Optionally, the drive portion 124 is provided with a mounting 14, the mounting 14 being for securing the power structure. Optionally, the mounting member 14 is removably connected to the body portion 121. For example, the mounting tool 14 is a fixing bracket formed by sheet metal working, a fixing column fixed to the main body 121, or other profile structure.

See fig. 1, 5 and 9: the butterfly valve disclosed in the above embodiment is applied to a valve body device to form a fixed flow metering valve or a flow adjustable regulating valve. In one embodiment, the butterfly valve device includes a butterfly valve and a drive assembly 50 drivingly coupled to the butterfly valve, the drive assembly 50 being coupled to the rotatable shaft 30 to drive the rotation of the poppet 20. Wherein the rotation angle of the valve core 20 is related to the driving angle of the driving assembly 50. In an alternative embodiment, the rotation angle of the valve core 20 ranges from 0 to 90 degrees. The driving assembly 50 may be configured to be a motor, a solenoid valve, etc., and the driving assembly 50 controls the valve core 20 to open by a predetermined angle.

For example, the drive assembly 50 controls the valve spool 20 to rotate in a first direction such that the valve spool 20 rotates 90 degrees relative to the valve seat 10 and the butterfly valve is in a maximum open position.

Alternatively, the driving assembly 50 is provided with a control assembly and a power element, the control assembly can control the valve core 20 to open a preset angle according to a control command, for example, the control assembly controls the power element to operate, so that the power element drives the valve core 20 to rotate towards a first direction, so that the valve core 20 rotates relative to the valve seat 10 by a preset angle, for example, 15 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, the butterfly valve can open to the preset angle according to a command, and the flow regulation is convenient.

Butterfly valves are widely used at present, and other structures and principles are the same as those in the prior art, and are not described in detail here.

Claims (10)

1. A butterfly valve is characterized by comprising a valve seat, a valve core and a rotating shaft fixedly arranged on the valve core, wherein the valve seat comprises a base and a valve body assembly which is assembled on the base in a floating mode, the valve body assembly is provided with a valve hole, at least part of the inner wall surface of the valve hole is provided with an inner right conical surface, the cross section contour line perpendicular to the central line of the valve hole is circular, the rotating shaft is rotatably assembled on the base and drives the valve core to rotate relative to the valve hole, the valve core is arranged on the valve hole, the outer side wall of the valve core is provided with an outer right conical surface matched with the inner right conical surface, and the central line of the valve core and the rotating central line of the;

the rotating shaft drives the valve core to rotate towards a first direction under the driving of external force, the valve core rotates relative to the valve body assembly and opens the valve hole, and the valve body assembly elastically resets;

the rotating shaft drives the valve core to rotate towards a second direction under the driving of external force, the valve core rotates relative to the valve body assembly and pushes the valve body assembly to move relative to the valve seat, the outer positive conical surface of the valve core is in sealing fit with the inner positive conical surface of the valve hole, and the central line of the valve core is overlapped with the axis of the valve hole.

2. The butterfly valve of claim 1 wherein the valve body assembly floats axially and/or radially relative to the valve bore.

3. The butterfly valve of claim 1, wherein the valve body assembly includes a locking member mounted to the base, a valve body ring, and an elastic pad disposed between the locking member and the valve body ring and at least a portion of the elastic pad is elastically deformed, the valve body ring abuts against the base under an elastic force of the elastic member, and the valve hole is opened in the valve body ring.

4. The butterfly valve of claim 3, wherein the valve body assembly further comprises a first floating ring mounted to the base, the elastic pad and the first floating ring are respectively disposed on two sides of the valve body ring, and the valve core abuts against the valve body ring and pushes the elastic pad and/or the first floating ring to elastically deform.

5. The butterfly valve according to claim 3 or 4, wherein the valve body assembly further comprises a second floating ring mounted on the base, the second floating ring is sleeved on the outer peripheral wall of the valve body ring, and the valve element abuts against the valve body ring and pushes the second floating ring and/or the elastic pad to deform elastically.

6. The butterfly valve of claim 3, wherein the locking member comprises a support ring secured to the base and two or more adjustment members spaced apart from the support ring, the adjustment members abutting the resilient pad.

7. The butterfly valve of claim 1, wherein the base includes a main body portion and a fitting portion protruding from the main body portion, the main body portion having a flow hole, the fitting portion protruding toward a center of the flow hole, a minimum outer dimension of the flow hole being larger than a maximum inner diameter of the valve hole, and the valve body assembly being fitted to the fitting portion.

8. The butterfly valve of claim 1 wherein the valve core includes a plate portion and a boss portion protruding from a side surface of the plate portion, the shaft being attached to the boss portion, the outer face cone being disposed around an outer peripheral wall of the plate portion.

9. The butterfly valve of claim 1, wherein the valve seat further comprises a sealing member mounted in the base and disposed around the shaft, and the shaft is sealingly coupled to the base via the sealing member.

10. A butterfly valve device comprising a drive assembly and a butterfly valve according to any one of claims 1 to 9, the drive assembly being connected to the rotary shaft to drive the rotation of the spool.

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