阅读说明：本技术 蝶阀和蝶阀装置 (Butterfly valve and butterfly valve device ) 是由 孙欣 易松达 戴鹏 王昌林 陆海民 施海峰 王锦胜 张爱民 于 2019-11-07 设计创作，主要内容包括：本发明公开了一种蝶阀和蝶阀装置。蝶阀包括阀座、阀芯和固设于所述阀芯的转动轴,所述阀座包括底座和浮动装配于所述底座的阀体组件。所述阀体组件设有阀孔,至少部分所述阀孔的内壁面设为内正锥面且垂直于所述阀孔中心线的截面轮廓线呈圆形。所述转动轴可转动装配于所述底座并带动所述阀芯相对于所述阀孔转动,所述阀芯安装于所述阀孔且所述阀芯的外侧壁设有与所述内正锥面匹配的外正锥面,所述阀芯的中心线与所述转动轴的回转中心线偏心预设距离。阀座与阀芯的配合面设为正锥形面,加工精度高,统配性好。阀芯封闭于阀座时,阀体组件相对于底座浮动,以使阀芯的外正锥面密封贴合于阀孔的内正锥面,配合余量好,密封紧密度高。(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.)

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.

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.