CN210687019U - Two-way hard seal butterfly valve - Google Patents
Two-way hard seal butterfly valve Download PDFInfo
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- CN210687019U CN210687019U CN201921421916.9U CN201921421916U CN210687019U CN 210687019 U CN210687019 U CN 210687019U CN 201921421916 U CN201921421916 U CN 201921421916U CN 210687019 U CN210687019 U CN 210687019U
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Abstract
The utility model relates to the technical field of valves, a two-way butterfly valve sealed firmly is disclosed, including valve body and valve shaft, movable disk seat that has conical surface structure through the pressure equipment of valve body clamping ring in the valve body, the valve body inner wall has concave yield stair structure, stair structure includes horizontal surface and vertical surface, movable disk seat outer wall have with the horizontal ladder face and the vertical ladder face of valve body stair structure adaptation, the laminating of horizontal ladder face and the horizontal surface of valve body stair structure, vertical ladder face has the clearance with stair structure's vertical surface, the butterfly plate passes through the metal seal circle with movable disk seat conical surface and seals, the butterfly plate passes through the connecting piece and is fixed and rotatory along with the valve shaft, the bearing is established with valve body friction position to the valve shaft, bearing department. The butterfly valve seat is in a form of automatically adjusting and moving through hydraulic power, the sealing effect can be guaranteed when the butterfly plate bears the pressure in the forward direction and the reverse direction, and when the butterfly plate bears the pressure in the reverse direction, the hydraulic power pushes the valve seat to move leftwards to be in close contact with the metal sealing ring and the rubber soft sealing ring at the butterfly plate to realize reverse sealing.
Description
Technical Field
The utility model relates to the technical field of valves, specifically, relate to a two-way butterfly valve sealed firmly.
Background
In a common metal hard seal butterfly valve, the butterfly plate is conical or spherical in seal geometry, and a butterfly plate seal ring forms a wedge effect with a valve seat through radial compression deformation and thrust of a forward medium, so that forward sealing is realized.
However, when the medium flows reversely, the butterfly plate sealing ring tends to separate from the sealing valve seat due to the thrust of the medium, and finally the reverse sealing effect of the butterfly valve is poor, so that the common butterfly valve is only suitable for the one-way sealing working condition.
The existing butterfly valve for two-way sealing has few two-way sealing, particularly under the condition of high pressure, the reverse sealing effect is not satisfactory, some butterfly valves for two-way sealing adopt a rubber soft sealing structure, namely, the reverse sealing is realized by increasing the compression amount of a rubber sealing ring, but the sealing effect is not durable, the sealing ring is easy to damage and not durable, and the reverse sealing can not be realized under the high pressure; in addition, butterfly valves using triple offset hard seal structures are also available, but have not performed well at high pressure reverse seals as evidenced by various usage feedback.
Disclosure of Invention
The utility model provides a technical problem lie in overcoming prior art's defect, provide one kind and can accomplish two-way equal pressure seal and can reach the two-way butterfly valve sealed firmly of zero leakage.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a two-way butterfly valve sealed firmly, including valve body and valve shaft, movable valve seat with conical surface structure is equipped with through valve body clamping ring pressure in the valve body, the stair structure of concave yield has on the valve body inner wall, stair structure includes horizontal surface and vertical surface, movable valve seat outer wall have with the valve body on the horizontal ladder face and the vertical ladder face of stair structure adaptation, horizontal ladder face is laminated with the horizontal surface of valve body stair structure, vertical ladder face has the clearance with stair structure's vertical surface, the butterfly plate passes through the metal seal circle with movable valve seat's conical surface and seals, the butterfly plate is as an organic whole with round pin fixed connection with the valve shaft, the butterfly plate is rotatory along with the valve shaft, valve shaft and valve body friction position are equipped with the bearing, bearing department.
Furthermore, a rubber soft sealing ring is additionally arranged at the sealing position of the metal sealing ring, the rubber soft sealing ring is positioned at the small-caliber end of the conical surface of the movable valve seat, and the rubber soft sealing ring is pressed and mounted at the metal sealing ring through a pressing plate and a butterfly plate pressing ring to form double sealing.
Furthermore, a set screw is arranged on the butterfly plate pressing ring and is abutted against the pressing plate so as to adjust the sealing degree of the rubber soft sealing ring.
Furthermore, the bearing is made of high-force brass and graphite.
Furthermore, the packing adopts a pressure self-sealing V-shaped combined sealing ring.
Further, the valve shaft is an integral valve shaft penetrating through the butterfly plate.
Compared with the prior art, the utility model discloses following beneficial effect has:
the butterfly valve creatively designs the valve seat into a form capable of automatically adjusting and moving through water power, the sealing effect can be ensured when the butterfly plate bears pressure in the forward direction and the reverse direction, and when the butterfly plate bears pressure in the reverse direction, the water power pushes the valve seat to move leftwards to be in close contact with the metal sealing ring and the rubber soft sealing ring at the butterfly plate, so that reverse sealing is realized.
The sealing ring at the butterfly plate is formed by combining and superposing a metal hard sealing ring and a rubber soft sealing ring, the metal hard sealing ring is used as a main sealing ring, the rubber soft sealing ring is used as an auxiliary sealing ring, and the rubber soft sealing ring can further enhance the sealing effect through the adjustment of a set screw.
Through the experiment, the butterfly valve of this application can realize two-way constant pressure seal and reach the sealed effect of zero leakage, thoroughly solved the butterfly valve and had been difficult to accomplish reverse sealed technological problem in the past, and the butterfly valve of this application is a great technological breakthrough in the aspect of high pressure butterfly valve reverse seal.
Drawings
Fig. 1 is a partial structural schematic view of a bidirectional hard seal butterfly valve according to embodiment 1.
Detailed Description
The invention will be further described with reference to specific embodiments, wherein the drawings are designed solely for the purpose of illustration and not as a definition of the limits of the patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
As shown in fig. 1, a two-way hard seal butterfly valve is provided, which comprises a valve body 1 and a valve shaft (not shown), the valve body is of a double eccentric structure, a movable valve seat 3 with a full stainless steel conical surface structure is press-mounted in an inner cavity of the valve body 1 through a valve body clamping ring 2, the valve body 1 is provided with a recessed step structure on an inner wall of a mounting position of the movable valve seat 3, the step structure comprises a transverse surface 11 and a vertical surface 12, the outer wall of the movable valve seat 3 is provided with a transverse step surface 31 and a vertical step surface 32 which are matched with the step structure on the valve body, the transverse step surface 31 is attached to the transverse surface 11 of the step structure of the valve body, the vertical step surface 32 is provided with a gap with the vertical surface 12 of the step structure, a butterfly plate 4 is sealed with the conical surface 33 of the movable valve seat through a metal seal ring 5, the butterfly plate and the valve shaft, and a filler is arranged at the bearing for packaging.
The two-way hard seal butterfly valve of this embodiment is through reserving the clearance between the vertical ladder face of movable valve seat and the vertical surface of stair structure, and movable valve seat takes place reverse movement to realize reverse seal and provides probably when overflowing in the butterfly valve for the medium is reverse, and wherein, movable valve seat need not to carry out manual operation control etc. and it is completely according to the medium condition of flowing come the self-regulation removal, and self-regulation nature is strong, can play good reverse seal effect.
In order to further enhance the reverse sealing effect, a rubber soft sealing ring 6 is additionally arranged at the sealing position of the metal sealing ring 5, the rubber soft sealing ring 6 is positioned at the small-caliber end of the conical surface of the movable valve seat, the rubber soft sealing ring 6 is pressed on the metal sealing ring through a pressing plate 7 to form double sealing, and the periphery of the pressing plate 7 is fixed in position through a butterfly plate pressing ring 8.
Specifically, the soft rubber seal ring 6 and the metal seal ring 5 are preferably of a staggered embedding structure, that is, the soft rubber seal ring 6 is provided with a convex part 61 at the end contacting with the metal seal ring, and the metal seal ring 5 is provided with a concave part and a convex part at the corresponding position of the convex part for matching, so that the two seal rings are interdependent and the problems of shifting, dislocation and the like cannot easily occur.
In addition, still be equipped with holding screw 9 and clamp plate 7 butt on the butterfly plate clamping ring 8 to adjust the degree of tightness of the soft sealing washer of rubber, when the soft sealing washer of rubber took place wearing and tearing after using a period, can continuously guarantee sealed effect through the holding screw 9 of appropriately screwing, certainly, when wearing and tearing to a certain extent, pull down butterfly plate clamping ring 8 and clamp plate 7 and change can soft sealing washer 6 of rubber.
The bearing of this embodiment butterfly plate and valve shaft junction adopts high-force brass to add the graphite material and makes, and coefficient of friction is little, all need not oiling lubrication under the long-term operating condition.
The packing adopts pressure self sealss V-arrangement combination sealing washer, and the bigger sealing effect is better under operating condition pressure.
General butterfly valve all adopts the sectional type valve shaft on the market, and the valve shaft of this embodiment is the integral valve shaft of lining up the butterfly plate, and this kind of through whole valve shaft rigidity of formula is good, and it is little to warp when the butterfly plate pressure-bearing, can not produce the pressure-bearing and deflect the phenomenon of implantating, and is very favorable to improving the reverse sealed effect of butterfly valve.
When the butterfly plate bears pressure reversely, hydraulic force can push the movable valve seat to move leftwards to be in close contact with the metal sealing ring and the rubber soft sealing ring, and excellent reverse sealing is achieved. The movement of the movable valve seat is adjusted by water power, and the sealing effect can be ensured in forward and reverse pressure bearing. A large number of test results prove that the butterfly valve of the embodiment achieves the good effect of zero leakage in the sealing under the working condition of bidirectional equal pressure (the pressure ratio is 1: 1). The application of the sealing structure thoroughly solves the technical problem that the butterfly valve is difficult to realize reverse sealing in the past, and is a great technical breakthrough especially for the butterfly valve with high pressure of 4.0 MPa.
At present, the bidirectional hard seal butterfly valve of the embodiment is successfully applied to Dongli pump station projects, and the effect is good.
It should be understood that the above-mentioned embodiments are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. The utility model provides a two-way butterfly valve sealed firmly, including valve body and valve shaft, a serial communication port, movable valve seat that has conical surface structure is equipped with through the valve body clamping ring pressure in the valve body, the stair structure of concave yield has on the valve body inner wall, stair structure includes horizontal surface and vertical surface, movable valve seat outer wall have with the valve body on the horizontal ladder face and the vertical ladder face of stair structure adaptation, the laminating of horizontal ladder face and the horizontal surface of valve body stair structure, vertical ladder face has the clearance with stair structure's vertical surface, the butterfly plate passes through the metal seal circle with movable valve seat's conical surface and seals, the butterfly plate passes through the connecting piece and is fixed and rotatory along with the valve shaft, the bearing is established with valve body friction position to the valve.
2. The bidirectional hard seal butterfly valve according to claim 1, wherein a soft rubber seal is further provided at the seal of the metal seal ring, the soft rubber seal is located at the small-caliber end of the conical surface of the movable valve seat, and the soft rubber seal is press-fitted at the metal seal ring through the pressing plate and the pressing ring of the butterfly plate to form a double seal.
3. The bidirectional hard seal butterfly valve of claim 2, wherein the butterfly plate pressing ring is further provided with a set screw for abutting against the pressing plate so as to adjust the tightness of the rubber soft seal ring.
4. The bidirectional hard seal butterfly valve of claim 1, wherein the bearing is made of high-force brass plus graphite.
5. The bidirectional hard seal butterfly valve of claim 1, wherein the packing is a pressure self-sealing V-shaped combination seal ring.
6. The bidirectional hard seal butterfly valve of claim 1 wherein the valve shaft is a unitary valve shaft extending through the butterfly plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921421916.9U CN210687019U (en) | 2019-08-29 | 2019-08-29 | Two-way hard seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921421916.9U CN210687019U (en) | 2019-08-29 | 2019-08-29 | Two-way hard seal butterfly valve |
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| Publication Number | Publication Date |
|---|---|
| CN210687019U true CN210687019U (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921421916.9U Active CN210687019U (en) | 2019-08-29 | 2019-08-29 | Two-way hard seal butterfly valve |
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| Country | Link |
|---|---|
| CN (1) | CN210687019U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022133900A1 (en) * | 2020-12-24 | 2022-06-30 | 浙江石化阀门有限公司 | High-pressure large-diameter two-way hard-sealing butterfly valve |
-
2019
- 2019-08-29 CN CN201921421916.9U patent/CN210687019U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022133900A1 (en) * | 2020-12-24 | 2022-06-30 | 浙江石化阀门有限公司 | High-pressure large-diameter two-way hard-sealing butterfly valve |
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