CN211574314U - Three-piece forged steel fixed ball valve - Google Patents
Three-piece forged steel fixed ball valve Download PDFInfo
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- CN211574314U CN211574314U CN201922500060.0U CN201922500060U CN211574314U CN 211574314 U CN211574314 U CN 211574314U CN 201922500060 U CN201922500060 U CN 201922500060U CN 211574314 U CN211574314 U CN 211574314U
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Abstract
The utility model relates to a ball valve discloses a three-piece formula forged steel fixed ball valve, including disk seat and the valve body back clamp plate of fixed connection in the disk seat both sides, the crimping has coaxial line and is annular fire prevention sealing washer between valve body back clamp plate and the disk seat, and the butt that the butt compressed fire prevention sealing washer between fire prevention sealing washer and the valve body back clamp plate supports tightly between butt and the valve body back clamp plate has the elastic component, compresses tightly the inflation piece that has the heat expansion between butt and the fire prevention sealing washer. After the ball valve is used for a period of time, the elastic force of the elastic part can be reduced, if a fire situation is met at the moment, the expansion part which is thermally expanded can expand between the abutting block and the fireproof sealing ring, so that the partial abutting force of the elastic part with the reduced elastic force is supplemented, and the fireproof sealing effect of the fireproof sealing ring is kept stable.
Description
Technical Field
The utility model relates to a ball valve especially relates to a three-piece type forged steel fixed ball valve.
Background
The three-piece forged steel fixed ball valve used in hydropower stations is a novel ball valve type, and has certain advantages unique to the structure of the three-piece forged steel fixed ball valve, such as no friction on the switch, difficult abrasion on the seal and small opening and closing torque. This reduces the size of the actuator to be fitted. And a multi-rotation electric actuating mechanism is matched, so that the adjustment and the tight cutting of the medium can be realized. The device is widely applicable to working conditions of strict cutting requirements such as petroleum, chemical engineering, urban water supply and drainage and the like. The valve can be tightly closed only by rotating 90 degrees and a small rotating moment, and the completely equal inner cavity of the valve body provides a straight flow channel with small resistance for a medium.
For example, in the three-piece ball valve disclosed in chinese patent with patent publication No. CN204512643U, a packing gland is provided between a valve seat and a valve rod, the packing gland is fixedly sealed with the valve seat and slidably sealed with the valve rod, a plurality of O-rings for sealing are provided between the packing gland and the valve rod, the packing gland is provided with a check ring at the periphery of each O-ring, and the check ring limits the O-ring so that the O-ring is clamped in the check ring and cannot fall off; the lower part of the valve seat is provided with a through hole, a support column penetrates through the through hole to be matched with the valve ball body, when the valve ball body moves to the bottom end, the support column abuts against the lower part of the valve ball body to prevent the valve ball body from descending, a steel ball is fixed at the top of the support column, a ball groove matched with the steel ball is arranged at the contact part of the lower end of the valve ball body and the support column, and when the valve ball body descends, the ball groove presses on the steel ball to enable the valve ball body to be matched.
The above prior art solutions have the following drawbacks: most current three-piece type ball valves are all similar, are equipped with valve body rear pressure plate in its spheroidal both sides, and the rear pressure plate compresses tightly through the spring has the fire prevention sealing washer that has the fire prevention effect, but, the spring will produce fatigue after working a period, and its elasticity descends under the unchangeable condition of distance, makes its elastic force that applys to the fire prevention sealing washer reduce to make fire prevention sealing performance reduce.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a three-piece type forged steel fixed ball valve, which has the advantages of stable fireproof sealing performance.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a three-piece formula forged steel fixed ball valve, includes disk seat and fixed connection the valve body back plate of disk seat both sides, the valve body back plate with the crimping has coaxial axis and is annular fire prevention sealing washer between the disk seat, fire prevention sealing washer with the butt compresses tightly between the valve body back plate the butt piece of fire prevention sealing washer, the butt piece with it has the elastic component to support tightly between the valve body back plate, the butt piece with compress tightly between the fire prevention sealing washer has the inflation piece of thermal expansion.
Through adopting above-mentioned technical scheme, the ball valve uses a period after, and the elasticity of elastic component can descend, if meet the condition of a fire this moment, the inflation piece that then the heat rises can expand between butt piece and fire prevention sealing washer to supply the partial holding power that elastic component elasticity descends, let the fire prevention sealed effect of fire prevention sealing washer remain stable.
The present invention may be further configured in a preferred embodiment as: the expansion piece comprises a first connecting piece and a second connecting piece which are mutually inserted and slide, a sealed cavity is formed between the first connecting piece and the second connecting piece, an annular sealing piece for sealing a connecting gap between the first connecting piece and the second connecting piece is arranged in the cavity, a sealed cavity is arranged in the annular sealing piece, and thermal expansion gas is filled in the cavity.
Through adopting above-mentioned technical scheme, when the inflation piece is heated, the gaseous volume of thermal expansion can become big to strut first connecting piece and second connecting piece, let the inflation piece inflation.
The present invention may be further configured in a preferred embodiment as: the first connecting piece is in a hollow tubular shape, the second connecting piece is inserted into two ends of the first connecting piece, the annular sealing pieces which are matched in pairs are arranged between the first connecting piece and the second connecting piece, and thermal expansion gas is filled between the annular sealing pieces which are matched in pairs.
Through adopting above-mentioned technical scheme, the annular seal spare can seal the gap at first connecting piece both ends, lets promote the second connecting piece after the gas inflation, and after a second connecting piece blocked, another second connecting piece also can continue to work.
The present invention may be further configured in a preferred embodiment as: and an expansion flame-retardant plate is pressed between the annular sealing elements which are matched in pairs.
Through adopting above-mentioned technical scheme, the fire-retardant board of inflation can participate in the inflation, can also be fire-retardant.
The present invention may be further configured in a preferred embodiment as: and a plate spring is fixedly connected between the expansion flame-retardant plate and the annular sealing element.
Through adopting above-mentioned technical scheme, leaf spring increases the elasticity of each position of inflation piece.
The present invention may be further configured in a preferred embodiment as: and a corrugated membrane ring for providing elasticity is fixedly connected between the expansion flame-retardant plate and the annular sealing element.
By adopting the technical scheme, the elasticity of each part of the expansion piece is increased by the corrugated membrane ring.
The present invention may be further configured in a preferred embodiment as: the first connecting piece, the second connecting piece, the annular sealing piece, the expansion flame-retardant plate and the plate spring are all annular and coaxial with the fireproof sealing ring.
By adopting the technical scheme, the expansion piece and the fireproof sealing ring have the same axial line, so that each part of the fireproof sealing ring has good fireproof sealing performance.
The present invention may be further configured in a preferred embodiment as: the elastic piece is a plate spring.
Through adopting above-mentioned technical scheme, the flexible volume of leaf spring is less than general spring, but elasticity is more stable, and along with operating time's lapse, the elasticity decrement of leaf spring is littleer.
In summary, the invention includes at least one of the following beneficial technical effects:
(1) the thermal expansion piece is arranged between the fireproof sealing ring and the abutting block, the expansion piece can expand when heated, and the distance change of the expansion piece after expansion can compress the elastic piece, so that the partial abutting force of the elastic piece with the reduced elasticity is supplemented, and the fireproof sealing effect of the fireproof sealing ring is kept stable;
(2) through setting up first connecting piece and at first connecting piece both ends complex second connecting piece, the annular seal spare can seal up the gap at first connecting piece both ends, lets promote the second connecting piece after the gas expansion, blocks the back at a second connecting piece, and another second connecting piece also can continue work, has improved the job stabilization nature of inflation piece.
Drawings
FIG. 1 is a schematic view of the internal structure of the ball valve of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of the portion B of FIG. 2;
fig. 4 is a schematic structural view of the plate spring replaced by a corrugated membrane ring according to the present invention.
Reference numerals: 1. a valve seat; 2. a sphere; 3. a valve body rear pressing plate; 4. a fireproof sealing ring; 5. a butting block; 6. an elastic member; 7. a first connecting member; 8. a second connecting member; 9. an annular seal; 10. an intumescent flame retardant sheet; 11. a plate spring; 12. a corrugated membrane ring.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Refer to fig. 1 and 2, for the utility model discloses a three-piece type forged steel fixed ball valve, including disk seat 1, be provided with spheroid 2 that the break-make runner was used in the disk seat 1, flange fixedly connected with valve body back plate 3 is passed through to disk seat 1's both sides, the crimping has fire prevention sealing washer 4 between valve body back plate 3 and the disk seat 1, set up the annular with spheroid 2 and the coaxial lead of circular runner on the disk seat 1, fire prevention sealing washer 4 is placed in the annular, valve body back plate 3 sets up the annular that corresponds with fire prevention sealing washer 4, place the butt piece 5 that compresses tightly fire prevention sealing washer 4 in the annular, support between butt piece 5 and the valve body back plate 3 and tightly have the elastic component 6 that plate spring 11 or spring made, plate spring 11 is little than the flexible volume of general spring, elasticity is more stable, along with operating time's lapse, plate spring 11's elasticity decrement is lit. In order to compensate the elastic force attenuation of the elastic member 6, a thermal expansion member is compressed between the abutting block 5 and the fireproof sealing ring 4.
The inflation piece is including pegging graft each other and the first connecting piece 7 and the second connecting piece 8 that slide, first connecting piece 7 is hollow tubulose, preferably the pipe type, all peg graft at the both ends of first connecting piece 7 has columniform second connecting piece 8, form confined cavity between first connecting piece 7 and the second connecting piece 8, be provided with the annular seal 9 who seals between first connecting piece 7 and the second connecting piece 8 and be connected the gap in the cavity, annular seal 9 can adopt fire-retardant rubber to make, an annular seal 9 that second connecting piece 8 corresponds, therefore, annular seal 9 cooperates in pairs, it has the gas that expands with heat to fill between the complex annular seal 9 in pairs, the gas that expands with heat can choose for use for carbon dioxide. An expansion flame-retardant plate 10 made of an expansion flame-retardant material is pressed between the annular sealing elements 9 matched in pairs, and the expansion flame-retardant plate 10 can participate in expansion and can also resist flame.
As shown in fig. 3 and 4, a plate spring 11 or a corrugated film ring 12 for providing elastic force is compressed between the expansion flame retardant plate 10 and the ring seal 9. The leaf springs 11 and the bellows rings 12 increase the elasticity of the expansion element at all points. The first connecting piece 7 and the second connecting piece 8, the annular sealing piece 9, the expansion flame-retardant plate 10, the plate spring 11 or the corrugated film ring 12 are all annular and coaxial with the fireproof sealing ring 4. The expansion piece and the fireproof sealing ring 4 are coaxial, so that each part of the fireproof sealing ring 4 has good fireproof sealing performance. Meanwhile, a closed cavity is also arranged inside the annular sealing element 9, and the cavity is sealed after thermal expansion gas made of carbon dioxide is injected into the cavity.
The implementation principle of the embodiment is as follows: the ball valve meets the condition of a fire, and then the inflation piece that the heat rises can expand between butt piece 5 and fire prevention sealing washer 4, and when inflation piece was heated, the gaseous volume of heat expansion can become big, struts annular seal 9, also can strut first connecting piece 7 and second connecting piece 8, lets the inflation piece inflation. The annular sealing member 9 in the expansion member can seal the gaps at the two ends of the first connecting member 7, so that the second connecting member 8 is pushed after the gas expands, and after one second connecting member 8 is clamped, the other second connecting member 8 can continue to work. Meanwhile, the annular sealing element 9 can expand to increase air tightness and elasticity of the expansion piece, the expansion flame-retardant plate 10 can expand and retard flame after being heated, and therefore partial abutting force of the expansion piece in a high-temperature state, which is caused by the elastic force reduction of the elastic piece 6, is supplemented, and the fireproof sealing effect of the fireproof sealing ring 4 is kept stable.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The utility model provides a three-piece type forged steel fixed ball valve, includes disk seat (1) and fixed connection the valve body back pressure plate (3) of disk seat (1) both sides, valve body back pressure plate (3) with the crimping has coaxial core line and is annular fire prevention sealing washer (4) between disk seat (1), its characterized in that, fire prevention sealing washer (4) with it compresses tightly to butt between valve body back pressure plate (3) butt piece (5) of fire prevention sealing washer (4), butt piece (5) with it has elastic component (6) to butt tightly between valve body back pressure plate (3), butt piece (5) with compress tightly the inflation piece that has the thermal expansion between fire prevention sealing washer (4).
2. The three-piece forged steel fixed ball valve according to claim 1, wherein the expansion member comprises a first connecting member (7) and a second connecting member (8) which are inserted into each other and slide, a closed cavity is formed between the first connecting member (7) and the second connecting member (8), an annular sealing member (9) for closing a connecting gap between the first connecting member (7) and the second connecting member (8) is arranged in the cavity, a closed cavity is arranged in the annular sealing member (9), and a thermal expansion gas is filled in the cavity.
3. The three-piece forged steel fixed ball valve according to claim 2, wherein the first connecting member (7) is hollow tubular, the second connecting member (8) is inserted into both ends of the first connecting member, the annular sealing members (9) which are matched in pairs are arranged between the first connecting member (7) and the second connecting member (8), and a thermal expansion gas is filled between the annular sealing members (9) which are matched in pairs.
4. A three-piece forged steel fixed ball valve according to claim 2, wherein an expansion fire retardant plate (10) is crimped between said annular seals (9) fitted in pairs.
5. Three-piece forged steel fixed ball valve according to claim 4, wherein a plate spring (11) is fixedly connected between said expanded flame retardant plate (10) and said annular seal (9).
6. A three-piece forged steel fixed ball valve according to claim 4, wherein a resilient corrugated diaphragm ring (12) is fixedly connected between said expanded flame retardant plate (10) and said annular seal (9).
7. A three-piece forged steel fixed ball valve according to claim 5, wherein said first and second connectors (7, 8), said annular seal (9), said expanded flame retardant plate (10), said plate spring (11) are all annular and coaxial with said flame retardant sealing ring (4).
8. A three-piece forged steel fixed ball valve according to claim 1, wherein said resilient member (6) is a plate spring (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922500060.0U CN211574314U (en) | 2019-12-31 | 2019-12-31 | Three-piece forged steel fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922500060.0U CN211574314U (en) | 2019-12-31 | 2019-12-31 | Three-piece forged steel fixed ball valve |
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| Publication Number | Publication Date |
|---|---|
| CN211574314U true CN211574314U (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922500060.0U Active CN211574314U (en) | 2019-12-31 | 2019-12-31 | Three-piece forged steel fixed ball valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404950A (en) * | 2021-05-21 | 2021-09-17 | 王锁成 | Lap joint flange |
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2019
- 2019-12-31 CN CN201922500060.0U patent/CN211574314U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404950A (en) * | 2021-05-21 | 2021-09-17 | 王锁成 | Lap joint flange |
| CN113404950B (en) * | 2021-05-21 | 2024-05-03 | 常州市武进雪堰石油化工备件有限公司 | Overlap joint flange |
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