CN213628914U - Flexible sealing multi-eccentric butterfly valve - Google Patents
Flexible sealing multi-eccentric butterfly valve Download PDFInfo
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- CN213628914U CN213628914U CN202022089352.2U CN202022089352U CN213628914U CN 213628914 U CN213628914 U CN 213628914U CN 202022089352 U CN202022089352 U CN 202022089352U CN 213628914 U CN213628914 U CN 213628914U
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Abstract
The utility model discloses a flexible sealing multi-eccentric butterfly valve, a butterfly plate is rotatably arranged in a channel of a valve body through an upper valve rod and a lower valve rod, wherein, the sealing part of the butterfly plate is in the shape of an eccentric round platform; an annular bulge is arranged in the channel, an insert ring is further arranged in the channel, and a sealing assembly is arranged between the insert ring and the side wall of the annular bulge; the sealing assembly is matched and sealed with the side surface of the sealing part; the seal assembly includes: the inner Y-shaped sealing ring, the pressing ring and the U-shaped sealing ring are sequentially abutted; the inner Y-shaped sealing ring, the U-shaped sealing ring and the sealing part are extruded and sealed. The utility model discloses can be applied to the frequent various medium operating mode of temperature reversal, still keep reliable two-way inseparable seal at the temperature variation in-process, thoroughly solve the condition emergence of leakage and the inefficacy that conventional butterfly valve product appears easily at the frequent in-process of temperature variation.
Description
Technical Field
The utility model relates to a butterfly valve especially relates to a many eccentric butterfly valves of flexible seal.
Background
The butterfly valve, also known as a flap valve, is a regulating valve or a cut-off valve generally applied to medium and low pressure working conditions, has the characteristics of light weight, compact structure, good regulating performance, reliable sealing performance, small fluid resistance and small operating torque, and is an ideal valve product for the marine and petrochemical industries.
Currently, butterfly valve products are mainly classified into three major categories:
the first type is a center line type butterfly valve, which mainly uses rubber sealing rings as the main parts, and because the center line type butterfly valve does not have an eccentric action, the opening and closing abrasion of the upper and lower end parts of a valve seat sealing ring is very large, and the center line type butterfly valve does not have the characteristics of long service life and low torque.
The second type is a double-eccentric butterfly valve, mainly uses a fluoroplastic sealing ring as a main part, and the valve is provided with two eccentric designs, so that the torque is reduced, meanwhile, the abrasion of a sealing pair is also reduced, the service life is prolonged, but the sealing ring is made of a single soft sealing material, and the reliable sealing performance under the condition of temperature alternation cannot be met.
The third type is a triple eccentric butterfly valve, which mainly uses a multi-layer graphite metal ring as a sealing ring type. When the valve is provided with three eccentric designs, the metal sealing ring is sealed under the extrusion condition, the service life is long, but the leakage amount cannot meet the requirement of zero leakage for a long time.
The conventional butterfly valve products cannot simultaneously meet the long-time reliable sealing performance under the condition of temperature alternation. The use of the medium with alternating temperature for a long time cannot be satisfied by users, even though the medium is substituted, a large burden is brought to the use and maintenance cost of the users, and the time for shutdown and maintenance is correspondingly prolonged. The final economic benefit of the user is affected.
Therefore, the utility model provides a valve that can adapt to the frequent various medium operating mode of temperature reversal.
SUMMERY OF THE UTILITY MODEL
The above object of the present invention is achieved by the following technical solutions:
a flexible sealing multi-eccentric butterfly valve is characterized in that a butterfly plate is rotatably arranged in a channel of a valve body through an upper valve rod and a lower valve rod, wherein a sealing part of the butterfly plate is in an eccentric round table shape; an annular bulge is arranged in the channel, an insert ring is further arranged in the channel, and a sealing assembly is arranged between the insert ring and the side wall of the annular bulge; the sealing assembly is matched and sealed with the side surface of the sealing part; the seal assembly includes: the inner Y-shaped sealing ring, the pressing ring and the U-shaped sealing ring are sequentially abutted; the inner Y-shaped sealing ring, the U-shaped sealing ring and the sealing part are extruded and sealed.
The flexible sealing multi-eccentric butterfly valve is characterized in that the upper section of the inner Y-shaped sealing ring is inverted Y-shaped; the cross section of the upper part of the U-shaped sealing ring is in a positive U shape, and the elastic metal ring is arranged in the U-shaped sealing ring.
The flexible sealing multi-eccentric butterfly valve is characterized in that the upper valve rod and the lower valve rod are inserted into the butterfly plate, and the upper valve rod and the lower valve rod are fixed with the butterfly plate through cylindrical pins.
The flexible sealing multi-eccentric butterfly valve comprises a valve body, a butterfly plate, a valve rod and a valve rod, wherein the valve body is provided with an upper valve rod hole and a lower valve rod hole; the lower opening of the lower valve rod hole is sealed through a blank cap and sealing filler, the lower portion of the lower valve rod is installed in the lower valve rod hole, and the upper portion of the lower valve rod is fixed with the butterfly plate.
The flexible sealing multi-eccentric butterfly valve is characterized in that a packing gland and sealing packing are mounted at the upper part of the upper valve rod hole, and the upper valve rod penetrates through the packing gland and the sealing packing.
The flexible sealing multi-eccentric butterfly valve is characterized in that the inner Y-shaped sealing ring is a metal sealing ring; the U-shaped sealing ring is a flood plug sealing ring made of soft sealing materials.
The flexible sealing multi-eccentric butterfly valve as described above, wherein a tubular projection is further provided between the annular projection and the channel; the cross section of the insert ring is provided with a right-angle side matched with the tubular bulge; insert intra-annular outside limit equidistance distributes and has a plurality of fixed orificess, the fixed orifices includes: the screw comprises a circular hole and a screw hole, and a plurality of screw threads penetrate through the screw hole and the end face of the tubular protrusion.
The flexible sealing multi-eccentric butterfly valve is characterized in that a sealing filler is arranged between the insert ring and the tubular bulge.
The flexible sealing multi-eccentric butterfly valve as described above, wherein the center lines of the upper valve stem and the lower valve stem are eccentric to the center line of the passage of the valve body.
The flexible sealing multi-eccentric butterfly valve is characterized in that the pressing contact line of the sealing component and the sealing part is eccentric to the center lines of the upper valve rod and the lower valve rod; an included angle is formed between the center line of the sealing part and the center line of the channel.
To sum up, owing to adopted above-mentioned technical scheme, the utility model discloses a seal assembly has double seal structure, and interior Y type sealing washer, U type sealing washer are all hugged closely with the sealing and are realized sealedly, the utility model discloses can be applied to the frequent various medium operating modes of temperature reversal, still keep reliable two-way inseparable sealed in the temperature variation in-process, thoroughly solved the condition emergence of the easy leakage that appears of conventional butterfly valve product in the frequent in-process of temperature variation and became invalid.
Drawings
FIG. 1 is a schematic structural view of a flexible sealing multi-eccentric butterfly valve of the present invention;
FIG. 2 is a sectional view of the flexible sealing multi-eccentric butterfly valve of the present invention;
fig. 3 is an enlarged view of a portion a of the flexible sealing multi-eccentric butterfly valve of the present invention.
Detailed Description
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic structural view of a flexible sealing multi-eccentric butterfly valve of the present invention, fig. 2 is a sectional structural view of the flexible sealing multi-eccentric butterfly valve of the present invention, fig. 3 is an enlarged view of a portion a of the flexible sealing multi-eccentric butterfly valve of the present invention, please refer to fig. 1 to 3, a flexible sealing multi-eccentric butterfly valve, a butterfly plate 3 is rotatably installed in a channel of a valve body 1 through an upper valve rod 12 and a lower valve rod 22, wherein a sealing portion of the butterfly plate 3 is in an eccentric truncated cone shape; an annular bulge is arranged in the channel, an insert ring 2 is also arranged in the channel, and a sealing assembly is arranged between the insert ring 2 and the side wall of the annular bulge; the sealing component is matched and sealed with the side surface of the sealing part; the seal assembly includes: the inner Y-shaped sealing ring 6, the pressing ring 15 and the U-shaped sealing ring 4 are sequentially abutted; the inner Y-shaped sealing ring 6 and the U-shaped sealing ring 4 are sealed with the sealing part in an extruding way. In a specific use process, the butterfly plate 3 is driven to rotate by rotating the upper valve rod 12, and the opening and closing operation of the butterfly valve is also realized. The opening and closing of the butterfly plate 3 can change the channel of the valve body 1 into a continuous cavity or separate the channel into two independent cavities.
Further, the section of the upper part of the inner Y-shaped sealing ring 6 is of an inverted Y shape; the section of the upper part of the U-shaped sealing ring 4 is in a positive U shape, and the elastic metal ring 5 is arranged in the U-shaped sealing ring 4. The bifurcated part of the inner Y-shaped sealing ring 6 and the bottom of the U-shaped sealing ring 4 are tightly attached to the sealing part to realize bidirectional tight sealing.
Further, the upper stem 12 and the lower stem 22 are inserted into the butterfly plate 3, and the upper stem 12 and the lower stem 22 are fixed to the butterfly plate 3 by the cylindrical pin 14.
Further, the valve body is provided with an upper valve rod 12 hole and a lower valve rod 22 hole, the lower part of the upper valve rod 12 penetrates through the upper valve rod 12 hole to be fixed with the butterfly plate 3, and the upper part of the upper valve rod 12 is provided with a key part 13; the lower opening of the lower valve rod 22 hole is sealed by a blank cap 19 and a sealing filler 7, the lower part of the lower valve rod 22 is installed in the lower valve rod 22 hole, and the upper part of the lower valve rod 22 is fixed with the butterfly plate 3. The blank cap 19 is secured by bolts 20.
Further, a packing gland 11 and a sealing packing 7 are installed at the upper part of the hole of the upper valve rod 12, and the upper valve rod 12 penetrates through the packing gland 11 and the sealing packing 7. The valve body 1 is designed as an integral casting structure, the hole of the upper valve rod 12 and the hole of the lower valve rod 22 are sealed by the sealing filler 7, the sealing filler 7 is arranged in the packing sealing box, different filler materials can be used in the packing sealing box, and the packing gland 11 and the blank cap 19 are pressed to establish an upper sealing structure.
Specifically, the sealing packing 7 is pressed on a stuffing box of a channel opening on the valve body 1 through a packing gland 11 by the fastening force of a stud 16, a nut 17 and a belleville spring 18, so that the medium in the pipeline is prevented from leaking outside. The belleville spring 18 may provide a stable, reliable, self-adapting flexible tightening force between the stud 16 and the nut 17.
Further, the inner Y-shaped sealing ring 6 is a metal sealing ring; the U-shaped sealing ring 4 is a flood plug sealing ring made of soft sealing materials. Specifically, the U-shaped seal ring 4 is a fluoroplastic seal ring.
Further, a tubular bulge is arranged between the annular bulge and the channel; the section of the insert ring 2 is provided with a right-angle side matched with the tubular bulge; the inside and outside limit equidistance of inserts ring 2 distributes and has a plurality of fixed orificess, and the fixed orifices includes: round hole, screw hole, a plurality of screws 9 screw thread pass screw hole, the protruding terminal surface of tubulose.
Furthermore, a sealing filler 7 is arranged between the insert ring 2 and the tubular bulge. The sealing packing 7 is also arranged between the insert ring 2 and the inner Y-shaped sealing ring 6, the side wall of the insert ring 2 is provided with an annular recess, sealing seasoning is arranged in the annular recess, and the sealing packing 7 can block fine capillary-hole-shaped channels among the insert ring 2, the tubular bulge and the inner Y-shaped sealing ring 6 to prevent medium from flowing in a small clearance.
Specifically, in the implementation process of the utility model, an annular filling bulge can be arranged between the surface of the annular bulge facing the insert ring 2 and the tubular bulge, the pressing ring 15 is abutted against the side surface of the filling bulge, an annular groove structure is formed between the pressing ring 15 and the surface of the filling bulge and between the annular bulge,
further, the center lines of the upper valve rod 12 and the lower valve rod 22 are eccentric with the channel center line of the valve body 1.
Further, the sealing component and the sealing portion extrusion contact line are eccentric with the center lines of the upper valve rod 12 and the lower valve rod 22, specifically: the extrusion contact lines of the inner Y-shaped sealing ring 6, the U-shaped sealing ring 4 and the butterfly plate 3 are eccentric with the central lines of the upper valve rod 12 and the lower valve rod 22.
Furthermore, an included angle exists between the center line of the sealing part and the center line of the channel. There is an angular offset between the centre line of the sealing portion of the butterfly plate 3 and the centre line of the transverse passage of the valve body 1. An offset distance exists between the contact line of the U-shaped sealing ring 4 and the butterfly plate 3 and between the contact line of the inner Y-shaped metal sealing ring and the butterfly plate 3 and the center lines of the upper valve rod 12 hole and the lower valve rod 22 hole of the valve body 1.
Therefore, the utility model has three eccentric structures, and the valve has three eccentric designs, one of which is the eccentricity between the axial lead of the upper valve rod 12 and the lower valve rod 22 and the central line of the channel of the valve body 1; the second is the eccentricity from the axial leads of the upper valve rod 12 and the lower valve rod 22 to the contact lines of the Y-shaped sealing ring 6, the U-shaped sealing ring 4 and the sealing ring of the butterfly plate 3 in the valve seat; and the third is that the angle between the central line of the oblique cone section of the sealing surface of the butterfly plate 3 and the central line of the pipeline of the valve body 1 is eccentric.
The utility model discloses an in the concrete operation process: when the butterfly plate 3 of the valve is opened, the valve body 1 is a cavity which penetrates left and right, after the butterfly plate 3 is closed, the inside of the valve body 1 of the valve is physically separated into a left valve cavity and a right valve cavity, the insert ring 2 is screwed on the valve body 1 through the screw 9 to press the valve seat of the U-shaped sealing ring 4 and the valve seat of the inner Y-shaped sealing ring 6 which have elasticity at the same time in the cavity on the left side of the valve, the two valve seats and the sealing surface of the butterfly plate 3 are contacted and extruded to establish bidirectional reliable sealing, and the mutual flowing of fluid media between the cavities on the two sides of the valve is cut off, so that the media of.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised in accordance with the principles of the present invention by those skilled in the art without the use of inventive faculty, or through software programming. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A flexible sealing multi-eccentric butterfly valve is characterized in that a butterfly plate is rotatably arranged in a channel of a valve body through an upper valve rod and a lower valve rod, and a sealing part of the butterfly plate is in an eccentric truncated cone shape; an annular bulge is arranged in the channel, an insert ring is further arranged in the channel, and a sealing assembly is arranged between the insert ring and the side wall of the annular bulge; the sealing assembly is matched and sealed with the side surface of the sealing part; the seal assembly includes: the inner Y-shaped sealing ring, the pressing ring and the U-shaped sealing ring are sequentially abutted; the inner Y-shaped sealing ring, the U-shaped sealing ring and the sealing part are extruded and sealed.
2. The flexible sealing multi-eccentric butterfly valve according to claim 1, wherein the inner Y-shaped seal ring has an inverted Y-shaped upper cross-section; the cross section of the upper part of the U-shaped sealing ring is in a positive U shape, and the elastic metal ring is arranged in the U-shaped sealing ring.
3. The flexible sealing multi-eccentric butterfly valve of claim 1, wherein the upper stem and the lower stem are inserted into the butterfly plate, and the upper stem and the lower stem are fixed to the butterfly plate by a cylindrical pin.
4. The flexible sealing multi-eccentric butterfly valve of claim 1, wherein the valve body has an upper stem bore through which the lower portion of the upper stem passes to be secured to the butterfly plate, and a lower stem bore through which the upper portion of the upper stem is fitted with a key portion; the lower opening of the lower valve rod hole is sealed through a blank cap and sealing filler, the lower portion of the lower valve rod is installed in the lower valve rod hole, and the upper portion of the lower valve rod is fixed with the butterfly plate.
5. The flexible sealing multi-eccentric butterfly valve according to claim 4, wherein a packing gland and a sealing packing are installed on the upper portion of the upper valve rod hole, and the upper valve rod penetrates through the packing gland and the sealing packing.
6. The flexible seal multi-eccentric butterfly valve of claim 1, wherein the inner Y-seal ring is a metal seal ring; the U-shaped sealing ring is a flood plug sealing ring made of soft sealing materials.
7. The flexible seal multi-eccentric butterfly valve of claim 1, further having a tubular projection between the annular projection and the channel; the cross section of the insert ring is provided with a right-angle side matched with the tubular bulge; insert intra-annular outside limit equidistance distributes and has a plurality of fixed orificess, the fixed orifices includes: the screw comprises a circular hole and a screw hole, and a plurality of screw threads penetrate through the screw hole and the end face of the tubular protrusion.
8. The flexible seal multi-eccentric butterfly valve of claim 7, wherein a seal packing is provided between the insert ring and the tubular boss.
9. The flexible seal multi-eccentric butterfly valve of claim 1, wherein the centerlines of the upper stem, the lower stem, and the channel centerline of the valve body are eccentric.
10. The flexible seal multi-eccentric butterfly valve of claim 1, wherein the seal assembly and the seal portion extrusion contact line are eccentric to the center line of the upper and lower valve stems; an included angle is formed between the center line of the sealing part and the center line of the channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022089352.2U CN213628914U (en) | 2020-09-22 | 2020-09-22 | Flexible sealing multi-eccentric butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022089352.2U CN213628914U (en) | 2020-09-22 | 2020-09-22 | Flexible sealing multi-eccentric butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213628914U true CN213628914U (en) | 2021-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022089352.2U Active CN213628914U (en) | 2020-09-22 | 2020-09-22 | Flexible sealing multi-eccentric butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213628914U (en) |
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2020
- 2020-09-22 CN CN202022089352.2U patent/CN213628914U/en active Active
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