CN212899783U - Bidirectional metal sealing flange butterfly valve - Google Patents
Bidirectional metal sealing flange butterfly valve Download PDFInfo
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- CN212899783U CN212899783U CN202021817683.7U CN202021817683U CN212899783U CN 212899783 U CN212899783 U CN 212899783U CN 202021817683 U CN202021817683 U CN 202021817683U CN 212899783 U CN212899783 U CN 212899783U
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Abstract
A bidirectional metal sealing flange butterfly valve relates to the field of valves. The butterfly valve is mainly designed for solving the problem that the existing bidirectional metal sealing flange butterfly valve is easy to leak water. The butterfly valve comprises a valve body, wherein an upper valve shaft mounting hole and a lower valve shaft mounting hole are formed in the valve body, the valve shaft is arranged in the upper valve shaft mounting hole and the lower valve shaft mounting hole, a valve seat mounting groove is formed in the inner wall of the valve body, a valve seat is arranged in the valve seat mounting groove, an inner ring of the valve seat is an elliptic cone, a butterfly plate is fixed on the valve shaft, and a plurality of layers of sealing rings are arranged in a plurality of; and an annular pressure plate outside the multi-layer sealing ring is fixed on the butterfly plate. The lower valve shaft mounting hole is provided with a lower bushing on the inner wall, the end cover is connected with the lower end of the lower valve shaft mounting hole, and a sealing gasket is arranged between the bottom of the valve shaft and the end cover. An upper bushing and packing are arranged on the inner wall of the upper valve shaft mounting hole, an annular gland is arranged above the packing, the valve shaft extends out of the annular gland, the upper end of the valve shaft is connected with a worm wheel in a worm wheel box, the worm wheel box is fixed on the valve body through a support, and a hand wheel is arranged at the outer end of a worm in the worm wheel box. Its advantage is no leakage of water.
Description
The technical field is as follows:
the utility model relates to a valve field specifically relates to an install two-way metal seal flange butterfly valve on heating power, water supply pipe.
Background art:
the valve shaft of the existing bidirectional metal sealing flange butterfly valve is not provided with a limiting device, so that the situation that the sealing ring is damaged due to the vertical movement of the valve shaft can occur, the center of the sealing ring of the butterfly plate is not overlapped with the center of the valve body, water leakage is caused, and the valve is invalid.
In addition, when the medium in the pipeline flows reversely, the valve sealing pair cannot bear the pressure of the reverse medium, and the condition of valve failure caused by water leakage of the valve can also occur.
The invention content is as follows:
the utility model aims to solve the technical problem that a two-way metal seal flange butterfly valve that valve shaft drunkenness about can not guarantee the two-way sealed effect is provided.
The above object is achieved by: the butterfly valve comprises an annular valve body, wherein an upper valve shaft mounting hole and a lower valve shaft mounting hole are respectively fixed at the upper end and the lower end of the valve body, the upper end and the lower end of the valve shaft are respectively mounted in the upper valve shaft mounting hole and the lower valve shaft mounting hole, a valve seat mounting groove is formed in the inner wall of the valve body on the front side of the valve shaft, an annular valve seat is mounted in the valve seat mounting groove, the width of the valve seat mounting groove is slightly larger than the thickness of the valve seat, so that the valve seat can float back and forth in the valve seat mounting groove, a sealing ring is arranged between the valve seat and the valve body, an inner ring of the valve seat is an elliptic cone, namely the diameter of the inner ring of the valve seat is gradually increased from front to back, a butterfly plate in clearance fit with the valve; an annular pressing plate is arranged outside the multi-layer sealing ring, and the annular pressing plate is fixed on the butterfly plate through screws after pressing the multi-layer sealing ring.
The lower valve shaft is provided with a lower bushing on the inner wall of the lower valve shaft mounting hole, the valve shaft is in contact with the lower bushing, the outer wall of the lower end of the valve shaft is provided with an annular groove, the position of the inner wall of the lower valve shaft mounting hole corresponding to the annular groove of the lower end of the valve shaft is also correspondingly provided with an annular groove, two semicircular split rings are sleeved in the annular groove of the lower end of the valve shaft, the part of the split rings exposed from the annular groove of the valve shaft is positioned in the annular groove of the inner wall of the lower valve shaft mounting hole, an end cover is connected to.
An upper bushing and packing are fixed on the inner wall of the upper valve shaft mounting hole, an annular gland is arranged above the packing, the valve shaft extends out of the annular gland, the upper end of the valve shaft is connected with a worm wheel in a worm wheel box, the worm wheel box is fixed on a support, the support is fixed on the valve body, and a hand wheel is installed at the outer end of a worm in the worm wheel box.
The upper and lower bushings are of a three-layer structure, wherein the outmost layer is a stainless steel layer, the middle layer is an alloy powder layer, the inner layer is a polytetrafluoroethylene layer, the stainless steel layer is in contact with the hole wall of the upper valve shaft mounting hole, and the polytetrafluoroethylene layer is in contact with the valve shaft.
The utility model has the advantages that: when the direction pressure appears in the pipeline and acts on the butterfly plate, because the thickness of disk seat slightly is less than the width of disk seat mounting groove, the disk seat can float, makes the disk seat bear the ability of forward pressure and backpressure equal, and the disk seat moves when increasing with the sealed specific pressure of contact of butterfly plate, also inseparabler, the condition of can not appearing leaking. The split ring is arranged at the bottom of the valve shaft, so that the valve shaft can be limited, and the influence on the sealing performance caused by the vertical movement of the valve shaft is prevented. Because the contact position of the upper bushing and the valve shaft is the polytetrafluoroethylene layer, the oil storage pit on the inner side surface of the polytetrafluoroethylene layer can store lubricating oil, lubricating oil does not need to be injected in the process of long-term operation, and in addition, the friction coefficient can be reduced.
Description of the drawings:
fig. 1 is a schematic front view of the present invention;
FIG. 2 is a view A-A of FIG. 1;
fig. 3 is a schematic top view of the upper bushing of the present invention.
The specific implementation mode is as follows:
the present invention will be further described with reference to FIGS. 1-3;
the valve comprises an annular valve body 1, wherein an upper valve shaft mounting hole 2 and a lower valve shaft mounting hole 3 are respectively fixed at the upper end and the lower end of the valve body, the upper end and the lower end of a valve shaft 4 are respectively mounted in the upper valve shaft mounting hole and the lower valve shaft mounting hole, a valve seat mounting groove is formed in the inner wall of the valve body at the front side of the valve shaft, an annular valve seat 5 is mounted in the valve seat mounting groove, the width of the valve seat mounting groove is slightly larger than the thickness of the valve seat, so that the valve seat can float back and forth in the valve seat mounting groove, a sealing ring 6 is arranged between the valve seat and the valve body, the inner ring of the valve seat is an elliptical cone, namely the diameter of the inner ring of the valve seat is gradually increased from front to back, a butterfly plate 7 in clearance fit with the valve seat is fixed on the; an annular pressure plate 9 is arranged outside the multi-layer sealing ring, and the annular pressure plate is fixed on the butterfly plate through screws after pressing the multi-layer sealing ring; a lower bushing 10 is arranged on the inner wall of the lower valve shaft mounting hole, the valve shaft is in contact with the lower bushing, an end cover 12 is connected to the lower end of the lower valve shaft mounting hole through a bolt, and a sealing gasket 13 is arranged between the bottom of the valve shaft and the end cover;
an upper bushing 14 and a packing 15 are fixed on the inner wall of the upper valve shaft mounting hole, an annular gland 16 is arranged above the packing, the valve shaft extends out of the annular gland, the upper end of the valve shaft is connected with a worm wheel 18 in a worm wheel box 17, the worm wheel box is fixed on a support 19, the support is fixed on the valve body, and a hand wheel 20 is installed at the outer end of a worm 21 in the worm wheel box.
The outer wall of the lower end of the valve shaft is provided with an annular groove, the position of the inner wall of the lower valve shaft mounting hole corresponding to the annular groove of the lower end of the valve shaft is also correspondingly provided with an annular groove, two semicircular split rings 11 are sleeved in the annular groove of the lower end of the valve shaft, and the exposed parts of the split rings from the annular groove of the valve shaft are positioned in the annular groove of the inner wall of the lower valve shaft mounting hole.
The upper bushing and the lower bushing are of three-layer structures, wherein the outmost layer is a stainless steel layer 22, the middle layer is an alloy powder layer 23, the inner layer is a polytetrafluoroethylene layer 24, the stainless steel layer is in contact with the wall of the upper valve shaft mounting hole, and the polytetrafluoroethylene layer is in contact with the valve shaft.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (3)
1. Two-way metal seal flange butterfly valve, including annular valve body (1), valve body upper end and lower extreme all are fixed with valve shaft mounting hole (2) and lower valve shaft mounting hole (3) respectively, and install respectively in upper and lower valve shaft mounting hole in valve shaft (4) upper and lower end, are equipped with the disk seat mounting groove on the valve body inner wall of valve shaft front side, and install characterized by in the disk seat mounting groove annular disk seat (5): the width of the valve seat mounting groove is slightly larger than the thickness of the valve seat, a sealing ring (6) is arranged between the valve seat and the valve body, the inner ring of the valve seat is an elliptic cone, namely the diameter of the inner ring of the valve seat is gradually increased from front to back, a butterfly plate (7) in clearance fit with the valve seat is fixed on the valve shaft through a pin, the front side surface of the butterfly plate, close to the outer edge, is provided with a multi-layer sealing ring mounting groove, a multi-layer sealing ring (8) is mounted in the multi-layer sealing ring mounting groove, and; an annular pressure plate (9) is arranged outside the multi-layer sealing ring, and the annular pressure plate is fixed on the butterfly plate through screws after pressing the multi-layer sealing ring; a lower bushing (10) is arranged on the inner wall of the lower valve shaft mounting hole, the valve shaft is in contact with the lower bushing, an end cover (12) is connected to the lower end of the lower valve shaft mounting hole through a bolt, and a sealing gasket (13) is arranged between the bottom of the valve shaft and the end cover;
an upper bushing (14) and a packing (15) are fixed on the inner wall of the upper valve shaft mounting hole, an annular gland (16) is arranged above the packing, the valve shaft extends out of the annular gland, the upper end of the valve shaft is connected with a worm wheel (18) in a worm gear box (17), the worm gear box is fixed on a support (19), the support is fixed on the valve body, and a hand wheel (20) is installed at the outer end of a worm (21) in the worm gear box.
2. A bi-directional metal sealing flange butterfly valve as claimed in claim 1, wherein: the outer wall of the lower end of the valve shaft is provided with an annular groove, the position of the inner wall of the lower valve shaft mounting hole, which corresponds to the annular groove of the lower end of the valve shaft, is also correspondingly provided with an annular groove, two semicircular split rings (11) are sleeved in the annular groove of the lower end of the valve shaft, and the parts of the split rings, which are exposed from the annular groove of the valve shaft, are positioned in the annular groove of the inner wall of the lower valve shaft.
3. A bi-directional metal-sealing flange butterfly valve according to claim 1 or 2, characterized in that: the upper and lower bushings are of a three-layer structure, wherein the outmost layer is a stainless steel layer (22), the middle layer is an alloy powder layer (23), the inner layer is a polytetrafluoroethylene layer (24), the stainless steel layer is in contact with the hole wall of the upper valve shaft mounting hole, and the polytetrafluoroethylene layer is in contact with the valve shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021817683.7U CN212899783U (en) | 2020-08-27 | 2020-08-27 | Bidirectional metal sealing flange butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021817683.7U CN212899783U (en) | 2020-08-27 | 2020-08-27 | Bidirectional metal sealing flange butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212899783U true CN212899783U (en) | 2021-04-06 |
Family
ID=75252032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021817683.7U Active CN212899783U (en) | 2020-08-27 | 2020-08-27 | Bidirectional metal sealing flange butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212899783U (en) |
-
2020
- 2020-08-27 CN CN202021817683.7U patent/CN212899783U/en active Active
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