CN216666524U - Butterfly valve - Google Patents
Butterfly valve Download PDFInfo
- Publication number
- CN216666524U CN216666524U CN202122642049.5U CN202122642049U CN216666524U CN 216666524 U CN216666524 U CN 216666524U CN 202122642049 U CN202122642049 U CN 202122642049U CN 216666524 U CN216666524 U CN 216666524U
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- valve body
- valve
- butterfly
- connecting shaft
- packing
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Abstract
The utility model provides a butterfly valve which can prevent a connecting shaft from being ejected out of a valve body by high-pressure fluid when a connecting piece between a butterfly plate and the connecting shaft is broken, so that the safety performance of the valve is improved. The butterfly valve comprises a valve body, a connecting shaft, butterfly plates and a valve seat, wherein mounting holes for the connecting shaft to extend into are respectively formed in the top and the bottom of the valve body, a fluid channel penetrating through the valve body is formed in the middle of the valve body, the connecting shaft extends into the mounting holes and is connected with the butterfly plates located in the fluid channel, the butterfly plates further comprise a packing box, the packing box is connected with one end, provided with the mounting holes, of the valve body, a clamping cavity is reserved between the packing box and the valve body, a clamping lug is arranged on the connecting shaft, the connecting shaft penetrates through a shaft hole penetrating through the packing box and is located in the clamping cavity, and the transverse maximum width of the clamping lug is larger than the diameter of the shaft hole; the bottom of the valve body is also provided with an assembly cavity, the bottom of the connecting shaft extends into the assembly cavity and is connected with a limiting block, and the transverse maximum width of the limiting block is larger than the diameter of the mounting hole.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a butterfly valve.
Background
The butterfly valve is a common regulating valve, which realizes the opening and closing of a valve body by controlling the rotation of a butterfly plate in the valve body, and the common butterfly valve structure is shown in fig. 1, fig. 2 and fig. 3, and comprises a valve body 100, wherein a mounting hole for a connecting shaft 101 to extend into and a fluid channel 102 for a fluid to pass through are arranged in the valve body 100, the top of the valve body is sealed by a packing gland 109, a packing ring and a packing, the bottom of the valve body 100 is sealed by a cover plate 108 and a sealing ring arranged between the cover plate and the valve body, the part of the connecting shaft 101 penetrating through the fluid channel 102 and penetrating through the fluid channel 102 is connected with the butterfly plate 103, the bottom of the connecting shaft 101 extends into the valve body and is guided by a connecting shaft sleeve, the butterfly plate 103 can rotate in the fluid channel 102 to play a role of blocking the fluid or enabling the fluid to normally flow, the butterfly plate 103 is connected with the connecting shaft 101 by a wedge pin 104, when the butterfly plate 103 needs to play a role of blocking the fluid, the butterfly plate 103 is in contact with and seals against the valve seat 105, and each individual valve seat 105 is mounted by pressing a clamping ring 107 against the valve seat 105 by means of an insert 106 connected to the valve body 100.
By adopting the butterfly valve with the structure, if the pressure in the fluid channel is too high, once the wedge pin connected with the butterfly plate and the connecting shaft is broken, the high pressure in the valve can eject the connecting shaft out of the top of the valve body, so that accidents are caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a butterfly valve, which can prevent a connecting shaft from being ejected out of a valve body by high-pressure fluid when a connecting piece between a butterfly plate and the connecting shaft is broken, so that the safety performance of the valve is improved.
The technical scheme is as follows: the utility model provides a butterfly valve, its includes valve body, connecting axle, butterfly plate, disk seat, the top and the bottom of valve body are offered respectively and are used for the mounting hole that the connecting axle stretched into, set up the fluid passage who runs through the valve body in the middle of the valve body, the connecting axle stretches into in the mounting hole and with be located the butterfly plate connection of fluid passage, its characterized in that: the connecting shaft penetrates through a shaft hole penetrating through the stuffing box and is positioned in the clamping cavity, and the transverse maximum width of the clamping lug is greater than the diameter of the shaft hole; the valve body bottom has still seted up the assembly chamber, the connecting axle bottom stretches into the assembly chamber is connected with the stopper, the horizontal maximum width of stopper is greater than the diameter of mounting hole.
It is further characterized in that:
a shaft sleeve is arranged between the connecting shaft and the valve body, a sealing gasket is arranged between the stuffing box and the valve body, a friction gasket is arranged between the clamping convex block and the valve body, and a thrust cushion block and a friction gasket are arranged between the limiting block and the valve body;
the limiting block is a limiting nut, and a gap is reserved between the limiting nut and the friction gasket;
the bottom of the valve body is connected with a bottom plug, the upper end of the bottom plug is placed in the assembly cavity and is connected with the inner wall of the assembly cavity through threads, and a sealing ring is arranged between the bottom plug and the valve body;
the top of the stuffing box is connected with a stuffing gland, and a stuffing pressing ring, stuffing and a stuffing gasket which are positioned below the stuffing gland are sequentially arranged between the connecting shaft and the stuffing box from top to bottom;
a valve seat is arranged at one end of the fluid channel through an insert and a pressing ring, and the valve seat is of an integrated structure;
the insert is in threaded connection with the valve body, and a spring sealing ring is arranged between the insert and the pressing ring;
sealing gaskets are respectively arranged between the spring sealing ring and the insert and between the spring sealing ring and the pressing ring.
The utility model has the beneficial effects that: during normal use, like conventional butterfly valve, can control the rotation of butterfly plate through rotating the connecting axle, and then control passing through of fluidics, in case the butterfly plate breaks away from with the connecting axle and is connected, because the joint lug on the connecting axle is located the packing box below, the connecting axle bottom is equipped with the stopper simultaneously, these two part structures homoenergetic limits the connecting axle rebound to can prevent it by the ejecting valve body of high-pressure fluid, thereby improve the security performance of valve.
Drawings
FIG. 1 is a schematic cross-sectional view of a conventional butterfly valve (valve cross-over);
FIG. 2 is a schematic structural view of a conventional butterfly valve (with the valve in a horizontal position);
FIG. 3 is a schematic cross-sectional view of a conventional butterfly valve when closed;
FIG. 4 is a schematic cross-sectional view of the present invention;
FIG. 5 is a schematic view of the present invention;
FIG. 6 is a schematic cross-sectional view of the present invention when closed;
FIG. 7 is an enlarged view taken at A in FIG. 4;
fig. 8 is an enlarged view of fig. 4 at B.
Detailed Description
As shown in fig. 4, 5 and 6, the butterfly valve comprises a valve body 100, a connecting shaft 101, a butterfly plate 103 and a valve seat 105, wherein the top and the bottom of the valve body 100 are respectively provided with a mounting hole for the connecting shaft 101 to extend into, a fluid passage 102 penetrating through the valve body 100 is formed in the middle of the valve body 100, the connecting shaft 101 extends into the mounting hole and is connected with the butterfly plate 103 in the fluid passage 102 through a wedge pin 104, the connecting shaft 101 is provided with a transverse clamping lug 2, the connecting shaft 101 penetrates through a shaft hole penetrating through the stuffing box 1, the clamping lug 2 is positioned in the clamping cavity, and the transverse maximum width of the clamping lug 2 is greater than the diameter of the shaft hole so that the lug cannot extend out through the shaft hole; with reference to fig. 7, assembly chamber 3 has still been seted up to valve body 100 bottom, connecting axle 101 bottom stretches into assembly chamber 3 and is connected with stopper 4, the horizontal maximum width of stopper 4 is greater than the diameter of mounting hole for stopper 4 can not get into in the mounting hole, and in the picture, stopper 4 is stop nut (need not tighten up), leaves the clearance between stop nut and the friction gasket 7, just so can keep the normal rotation of axle ability, and can further connect through spot welding between axle bottom and the nut.
More specifically: the shaft sleeve 5 is arranged between the connecting shaft 101 and the valve body 100, the connecting shaft can be guided when the shaft penetrates through a shaft hole of the valve body, a sealing gasket 6 is arranged between the packing box 1 and the valve body in combination with the drawing 7 and the drawing 8, a friction gasket 7 is arranged between the clamping convex block 2 and the valve body 100, a thrust cushion block 8 and the friction gasket 7 are arranged between the limiting block 4 and the valve body 100, and friction between the thrust cushion block and the friction gasket 7 can be reduced by the friction gasket.
In order to increase the sealing performance, the bottom of the valve body 100 is connected with a bottom plug 9, the upper end of the bottom plug 9 is arranged in the assembly cavity 3 and is connected with the inner wall of the assembly cavity 3 through threads, a sealing ring is arranged between the bottom plug 9 and the valve body 100, a circle is built-up at the bottom plug, and the valve body is further effectively sealed under high pressure.
In order to ensure the sealing performance between the stuffing box and the shaft, the top of the stuffing box 1 is connected with a stuffing gland 10, and a stuffing pressing ring 11, a V-shaped stuffing 12 and a stuffing gasket 13 which are positioned below the stuffing gland 10 are sequentially arranged between the connecting shaft 101 and the stuffing box 1 from top to bottom.
One end of the fluid channel 102 is provided with a valve seat 105 through an insert 106 and a clamping ring 107, and the valve seat 105 is of an integrated structure, so that the cross section is reduced, and the torque force is smaller when the valve is opened and closed.
The insert 106 is in threaded connection with the valve body 100, and a spring sealing ring 14 is arranged between the insert 106 and a pressing ring 107; sealing gaskets are respectively arranged between the spring sealing ring 14 and the insert 106 and between the annular insert 106 and the pressing ring 107, the annular insert 106 is screwed into the valve body 100 through threads, and pretightening force is applied to the spring sealing ring 14, so that pressure is gradually applied to the pressing ring 107, the sealing specific pressure at the tail end of the valve seat 105 can be effectively adjusted, and the optimal sealing point position (elastic sealing) is achieved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a butterfly valve, its includes valve body, connecting axle, butterfly plate, disk seat, the top and the bottom of valve body are offered respectively and are used for the mounting hole that the connecting axle stretched into, set up the fluid passage who runs through the valve body in the middle of the valve body, the connecting axle stretches into in the mounting hole and with be located the butterfly plate connection of fluid passage, its characterized in that: the connecting shaft penetrates through a shaft hole penetrating through the stuffing box and is positioned in the clamping cavity, and the transverse maximum width of the clamping lug is greater than the diameter of the shaft hole; the valve body bottom has still seted up the assembly chamber, the connecting axle bottom stretches into the assembly chamber is connected with the stopper, the horizontal maximum width of stopper is greater than the diameter of mounting hole.
2. A butterfly valve in accordance with claim 1, wherein: the sealing structure is characterized in that a shaft sleeve is arranged between the connecting shaft and the valve body, a sealing gasket is arranged between the stuffing box and the valve body, a friction gasket is arranged between the clamping convex block and the valve body, and a thrust cushion block and a friction gasket are arranged between the limiting block and the valve body.
3. A butterfly valve in accordance with claim 2, wherein: the limiting block is a limiting nut, and a gap is reserved between the limiting nut and the friction gasket.
4. A butterfly valve in accordance with claim 1, wherein: the bottom of the valve body is connected with a bottom plug, the upper end of the bottom plug is placed in the assembly cavity and is connected with the inner wall of the assembly cavity through threads, and a sealing ring is arranged between the bottom plug and the valve body.
5. A butterfly valve in accordance with claim 1, wherein: the packing gland is connected to the top of the packing box, and a packing pressing ring, packing and a packing gasket which are located below the packing gland are sequentially arranged between the connecting shaft and the packing box from top to bottom.
6. A butterfly valve in accordance with claim 1, wherein: the inlet section of the fluid channel is provided with a valve seat through an insert and a pressing ring, and the valve seat is of an integrated structure.
7. The butterfly valve of claim 6, wherein: the insert is in threaded connection with the valve body, and a spring sealing ring is arranged between the insert and the pressing ring.
8. The butterfly valve of claim 7, wherein: sealing gaskets are respectively arranged between the spring sealing ring and the insert and between the spring sealing ring and the pressing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122642049.5U CN216666524U (en) | 2021-11-01 | 2021-11-01 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122642049.5U CN216666524U (en) | 2021-11-01 | 2021-11-01 | Butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216666524U true CN216666524U (en) | 2022-06-03 |
Family
ID=81783007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122642049.5U Active CN216666524U (en) | 2021-11-01 | 2021-11-01 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216666524U (en) |
-
2021
- 2021-11-01 CN CN202122642049.5U patent/CN216666524U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |