CN105299257A - An external control ball valve - Google Patents
An external control ball valve Download PDFInfo
- Publication number
- CN105299257A CN105299257A CN201510838369.4A CN201510838369A CN105299257A CN 105299257 A CN105299257 A CN 105299257A CN 201510838369 A CN201510838369 A CN 201510838369A CN 105299257 A CN105299257 A CN 105299257A
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- CN
- China
- Prior art keywords
- valve
- servomotor
- seal ring
- rear cover
- cylinder
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
Abstract
The present invention provides an external control ball valve. The valve comprises a valve body with a valve therein and a front cover and a back cover disposed on the water inlet and outlet sides of the valve body respectively. The external control ball valve is characterized in that a front seal ring and a back seal ring matching with the front and back covers are disposed respectively on the respective inner ends of the front and back covers within the valve body, and the front and back seal rings are connected with a servomotor piston rod. The servomotor piston rod passes through the corresponding front and back covers and is connected with a servomotor cylinder body outside the valve body. The servomotor cylinder body is fixed on the front and back covers. A respective sealing face of the front and back seal rings matches with the valve without being connected. The structures of the front and back seal rings and the structure for driving the seal rings to move are simplified. Valve opening or closing can be realized by pushing the seal rings within the valve body to move by an external servomotor. The structure of the ball valve is simplified, and reliable sealing is achieved. The ball valve avoids the problem of oil and water mixing, reduces the weights of the seal rings and the front and back covers, and is easy to machine.
Description
Technical field
The present invention relates to a kind of ball valve, especially a kind of ball valve from external control sealing, belongs to valve design manufacturing technology field.
Background technique
Water inlet cue ball valve is one of vitals of hydraulic generator set, it directly affect run in power station Security, reliability, stability and economic benefit.Therefore the requirement that the water inlet cue ball valve that water power plant uses has it special: is use latus rectum scope large, may from tens centimetres to, 200 centimetres; Two is use the scope of head large, can from the supreme km of hundreds of rice; Three is high to its Security, reliability and the requirement in working life.From ball valve design, the Manufacturing Status of domestic market, its structural feature and working principle similar, namely in valve body, be positioned at valve water-in and water-out side be provided with moveable seal ring, when valve turns to closed position, need to promote seal ring with press water or pressure oil, make seal ring compress the sealing surface of valve, thus seal current.But, from actual service condition, the subject matter that the ball valve of this class formation exists is as follows: first, due to a seal ring inherently suitable piston, the valve body matched with seal ring is just equivalent to the cylinder body of piston cylinder, therefore sealing ring to be promoted and just pressure oil or press water must be used, multiple sealing part and specific structure will be needed like this to ensure the sealing in the movement of seal ring and moving process, therefore be the main cause causing this type of ball-valve structure complexity, in addition the work under bad environment of seal ring, link is many, Sealing very easily lost efficacy, and then cause the pressure oil of promotion seal ring movement or press water very easily to mix mutually with the pressure water in valve flowing channel, cause hydraulic system fault, make valve cisco unity malfunction.The second, the working position of seal ring needs to lock, and seal ring input or position signal when exiting need the automatic control system fed back in time, exactly outside valve.But due to the structural limitations by existing ball valve, the position signal device of seal ring and lock ingot all not easily arranges and installs, cause ball-valve structure to be difficult to simplify, and the reliability of telltale is difficult to obtain guarantee.3rd, because seal ring and valve body are exactly the relation of piston and cylinder body, and seal ring size is comparatively large, and its machining accuracy is difficult to obtain guarantee, can affect its using effect.4th, the Environmental Conditions of seal ring and size determine the pressure rating of its working solution potential source can not be too high, thus not easily with the servomotor common high voltage oil sources controlling valve; If use the operation of pressure water source, then also need supporting corresponding filtration, decompressor ensures, the problems such as hydraulic system complexity, fault are many, poor reliability that this just brings.
In sum, under the background of prior art, carrying out innovating with improving to the structure of water power plant water inlet cue ball valve is highly significant, the small hydro turbine group of special centering high head, uses a kind of simple and clear, reliable, safe, durable water inlet cue ball valve to be necessary very much with valuable.
Summary of the invention
The object of the present invention is to provide a kind of structure simple, seal ring conveniently moving, reliable, be convenient to the outer valve-control spherical that automation precisely controls.
The present invention is completed by following technical proposal: a kind of outer valve-control spherical, the valve body of valve is established in comprising, be located at valve body respectively to enter, the protecgulum of water outlet side and bonnet, before it is characterized in that being positioned in valve body, bonnet the inner is respectively equipped with front, before bonnet is matched, increasing back sealing ring, and it is front, increasing back sealing ring is connected with servomotor piston rod respectively, servomotor piston rod is through before correspondence, bonnet is connected with the servomotor cylinder body outside valve body, before servomotor cylinder body is fixed on, on bonnet, before, the sealing surface of increasing back sealing ring is matched with valve but be not connected, when after rotation valve to closed position, promote seal ring by servomotor to move and make its sealing surface and valve close contact and the circulation that blocks water, otherwise during Open valve, first seal ring is pulled to make the sealing surface of seal ring recess valve by servomotor, namely rotatable valve is to enable possition.
Described forward and backward seal ring is the cylinder of band cavity, the outer end external cylindrical surface of cylinder is matched with corresponding front/rear cover inwall, and slide along corresponding front/rear cover inwall, the cavity of cylinder is a part for flow channel, the inner of cylinder is provided with multiple radial lobes, each lug is provided with through hole, through hole is passed by fastening nuts in the inner of each servomotor piston rod, to be fixed on multiple servomotor by seal ring, thus under the common manipulation of multiple servomotor, seal ring is moved.
The outer end external cylindrical surface of described forward and backward seal ring is provided with some roads annular seal groove, is provided with seal ring, for the pressure water between seal sliding surface in per pass annular seal groove.
Lug on described forward and backward seal ring and servomotor quantity all can increase with valve diameter and increase, to realize the stable movement of seal ring and good sealing effect.
Described servomotor is conventional oil hydraulic cylinder, high pressure fuel source can be used, being connected with the hydraulic station manipulating valve servomotor into and out of oil pipe on this oil hydraulic cylinder, to adopt same hydraulic station to provide high pressure fuel source to seal ring servomotor, valve servomotor, reduce the volume of servomotor, simplify the hydraulic pipe line of ball valve, improve hydraulic station working efficiency.
Described servomotor piston rod is provided with limit switch, limit switch is connected with the conventional automatic controller outside valve by wire, seal ring position signal accurately, is in time fed back to automatic controller, thus complete the locking of seal ring, prevent the misoperation of seal ring, improve valve Security.
Described front/rear cover is respectively equipped with the flange be connected with bypass tube, bypass tube is provided with valve, when opening ball valve, first to be made by bypass tube that valve is forward and backward all presses, reduces the steering force controlling valve; Excessive water hammer pressure may be there is in pressure piping when avoiding valve opening; To avoid when small gap high-velocity flow to the erosion damage of sealing surface.
The present invention has following advantages and effect: adopt such scheme:
First, simplify the structure of forward and backward seal ring self and drive the structure of seal ring movement, only with the multiple small-sized hydraulic servomotors outside valve body, can move by the forward and backward seal ring promoted from outside in valve body, the throwing realizing ball valve seal ring is moved back, structure decreases multiple-sealed link, avoids oil, problem that water may mix mutually, make seal ring simultaneously, front/rear cover have lightweight, be easy to the feature of processing.
The second, the servomotor promoting seal ring movement is conventional small-scale liquid cylinder pressure, and its volume is little, does not take up space, reliable operation, and is the static seal very easily realized between servomotor and front/rear cover, processing, easy for installation.The quantity of servomotor can be arranged according to the size of valve size and action required power.
3rd, the power source of seal ring servomotor and ball valve valve servomotor, all from same hydraulic station, simplifies the hydraulic plumbing system of ball valve, improves utilization efficiency and the working efficiency of hydraulic station, adds the reliability of valve working.
4th, because the seal ring in valve body is connected with the servomotor outside valve body, therefore by being arranged on the limit switch on servomotor piston rod, the position information of seal ring is fed back to automatic controller in time, exactly, seal ring servomotor can be locked under the state of valve closing, effective misoperation preventing seal ring, improves the Security of valve working.
5th, the using scope of this ball valve is larger: use latus rectum scope 500 ~ 2000CM, and use head scope 100 ~ 1000M, the pressure rating of hydraulic station is 16MPa.
Technical economic benefit of the present invention is: because structure is simple, decrease out of order link, clear and definite and the perfect using function of each component, manufacture difficulty has been fallen at the end, simplify the hydraulic pressure needed for product, feedback, lock ingot system, improve the overall performance of product, the rate of fault of product is significantly reduced, reliability and working life obviously increase, and the Security that water power plant turbine-generator units is run and technical economic benefit are improved.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the seal ring side view in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
Outer valve-control spherical provided by the invention, the valve body 3 of valve 4 is established in comprising, be located at protecgulum 1 and the bonnet 7 of valve body 3 water-in and water-out side respectively, wherein the inner of front/rear cover 1,7 is respectively equipped with identical with front/rear cover 1,7 matched forward and backward seal ring 11(forward and backward seal ring 11 structures, installation direction is contrary), and forward and backward seal ring 11 is connected with the piston rod of servomotor 2 respectively, servomotor 2 piston rod is connected with the servomotor cylinder body 6 outside valve body 3 through corresponding front/rear cover 1,7, and servomotor cylinder body 6 is fixed on front/rear cover.The sealing surface (i.e. interior edge face) of forward and backward seal ring 11 can be matched with valve 4 but be not connected.
Described forward and backward seal ring 11 is the cylinder of band cavity, the outer end external cylindrical surface of cylinder is matched with corresponding front/rear cover 1,7 inwall, and slide along corresponding front/rear cover 1,7 inwall, the cavity of cylinder is a part for flow channel, the inner of cylinder is provided with multiple radial lobes 12, each lug 12 is provided with through hole, through hole is passed by fastening nuts in the inner of each servomotor 2 piston rod, to be fixed on multiple servomotor 2 by seal ring 11, thus under the common manipulation of multiple servomotor 2, seal ring 11 is made to move.
The outer end external cylindrical surface of described forward and backward seal ring 11 is provided with some roads annular seal groove, arranges seal ring 10, for the pressure water between seal sliding surface in per pass groove.Lug 12 on forward and backward seal ring 11 and the quantity of servomotor 2 can increase with valve diameter and increase, to realize the stable movement of seal ring and good sealing effect.
Described servomotor 2 is conventional oil hydraulic cylinder, and being connected with hydraulic station into and out of oil pipe 5 on this oil hydraulic cylinder, valve servomotor 14 also shares same hydraulic station, improves the utilization efficiency of hydraulic station.
Described servomotor 2 piston rod is provided with conventional limit switch, and limit switch is connected with automatic controller by wire, and seal ring 11 position signal accurately, is in time fed back to automatic controller, thus the keying of safety and precise ground control valve.
Described front/rear cover 1,7 is respectively equipped with the flange be connected with bypass tube 9, and bypass tube 9 is provided with valve 13.14 is the operation servomotor of valve 4, is also conventional hydraulic cylinder.
During work, after rotating valve 4 to closed position (upper half part as Fig. 1), seal ring 11 is promoted to its sealing surface close contact valve 4 to block current by servomotor 2, otherwise during Open valve, first made by bypass tube 9 that valve 4 is forward and backward all presses, reduce the steering force controlling valve, excessive water hammer pressure may be there is in pressure piping when avoiding valve opening, to avoid when small gap high-velocity flow to the erosion damage of sealing surface, promoting seal ring 11 by servomotor 2 again makes its sealing surface recess valve 4, then rotates valve 4 to enable possition.
Claims (7)
1. an outer valve-control spherical, the valve body of valve is established in comprising, be located at protecgulum and the bonnet of valve body water-in and water-out side respectively, it is characterized in that being positioned at front/rear cover the inner in valve body is respectively equipped with the forward and backward seal ring matched with front/rear cover, and forward and backward seal ring is connected with servomotor piston rod respectively, servomotor piston rod is connected with the servomotor cylinder body outside valve body through corresponding front/rear cover, servomotor cylinder body is fixed on front/rear cover, and the sealing surface of forward and backward seal ring is matched with valve but be not connected.
2. outer valve-control spherical according to claim 1, it is characterized in that described forward and backward seal ring is the cylinder of band cavity, the outer end external cylindrical surface of cylinder is matched with corresponding front/rear cover inwall, and slide along corresponding front/rear cover inwall, the cavity of cylinder is a part for flow channel, the inner of cylinder is provided with multiple radial lobes, and each lug is provided with through hole, and through hole is passed by fastening nuts in the inner of each servomotor piston rod.
3. outer valve-control spherical according to claim 1, is characterized in that the outer end external cylindrical surface of described forward and backward seal ring is provided with some roads annular seal groove, is provided with seal ring in per pass annular seal groove.
4. outer valve-control spherical according to claim 1, is characterized in that lug on described forward and backward seal ring and servomotor quantity all increase with valve diameter and increases.
5. outer valve-control spherical according to claim 1, is characterized in that described servomotor is conventional oil hydraulic cylinder.
6. outer valve-control spherical according to claim 1, it is characterized in that described servomotor piston rod is provided with limit switch, limit switch is connected with the conventional automatic controller outside valve by wire.
7. outer valve-control spherical according to claim 1, it is characterized in that described front/rear cover being respectively equipped with the flange be connected with bypass tube, bypass tube is provided with valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510838369.4A CN105299257B (en) | 2015-11-26 | 2015-11-26 | A kind of external control ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510838369.4A CN105299257B (en) | 2015-11-26 | 2015-11-26 | A kind of external control ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105299257A true CN105299257A (en) | 2016-02-03 |
| CN105299257B CN105299257B (en) | 2017-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510838369.4A Active CN105299257B (en) | 2015-11-26 | 2015-11-26 | A kind of external control ball valve |
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| Country | Link |
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| CN (1) | CN105299257B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137317A (en) * | 1997-07-16 | 1999-02-12 | Hideo Koo | Ball valve |
| CN1315624A (en) * | 2000-03-27 | 2001-10-03 | 王加新 | Sealing structure with inserting plate in oblique slot to close it for valve |
| CN102401146A (en) * | 2010-09-14 | 2012-04-04 | 上海伟伦阀门有限公司 | Large-caliber small-torque ball valve |
| CN102410383A (en) * | 2010-09-23 | 2012-04-11 | 郝思宏 | Internal sealing specific pressure-regulable fixed-ball ball valve |
| CN203670878U (en) * | 2014-01-19 | 2014-06-25 | 盐城圣科球阀有限公司 | Novel externally-controlled seal ball valve |
| CN104279349A (en) * | 2013-07-01 | 2015-01-14 | 四川凯茨阀门制造有限公司 | Ball valve with movable valve seats |
-
2015
- 2015-11-26 CN CN201510838369.4A patent/CN105299257B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137317A (en) * | 1997-07-16 | 1999-02-12 | Hideo Koo | Ball valve |
| CN1315624A (en) * | 2000-03-27 | 2001-10-03 | 王加新 | Sealing structure with inserting plate in oblique slot to close it for valve |
| CN102401146A (en) * | 2010-09-14 | 2012-04-04 | 上海伟伦阀门有限公司 | Large-caliber small-torque ball valve |
| CN102410383A (en) * | 2010-09-23 | 2012-04-11 | 郝思宏 | Internal sealing specific pressure-regulable fixed-ball ball valve |
| CN104279349A (en) * | 2013-07-01 | 2015-01-14 | 四川凯茨阀门制造有限公司 | Ball valve with movable valve seats |
| CN203670878U (en) * | 2014-01-19 | 2014-06-25 | 盐城圣科球阀有限公司 | Novel externally-controlled seal ball valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105299257B (en) | 2017-12-01 |
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| C06 | Publication | ||
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 650100 Kunming, Xishan District, Yunnan Spring Road, No. 349 Applicant after: Kunming Motor Factory Co Ltd Address before: 650100 Kunming, Xishan District, Yunnan Spring Road, No. 349 Applicant before: Harbin electric motor factory (Kunming) Co., Ltd. |
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