CN102878316B - Ball valve reliable in sealing and low in opening-closing torque - Google Patents
Ball valve reliable in sealing and low in opening-closing torque Download PDFInfo
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- CN102878316B CN102878316B CN201210408824.3A CN201210408824A CN102878316B CN 102878316 B CN102878316 B CN 102878316B CN 201210408824 A CN201210408824 A CN 201210408824A CN 102878316 B CN102878316 B CN 102878316B
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Abstract
The invention relates to a valve, in particular to a ball valve reliable in sealing and low in opening-closing torque. The ball valve comprises a valve body with a valve cavity, a ball positioned in the valve cavity, a valve rod in linkage with the ball and a valve seat sealing mechanism arranged between the valve body and the ball. A valve seat component and an annular valve seat component cavity are in airtight fit to form a structure similar to a piston. A pre-tensioning elastic part and a three-way reversing valve are arranged on one side, opposite to the ball, of the valve body. The three-way reversing valve is used for controlling pressure applied to the ball by the valve seat component under different conditions and an operating air source of a pneumatic device to realize the fact that when the valve is closed, the pressure applied to the ball by the valve seat component is large, the sealing performance is fine, and when the valve is opened, the pressure applied to the ball by the valve seat component is small. Therefore, the opening power is low, a ball sealing face is less prone to damage during opening, and the service life of the ball valve is prolonged.
Description
Technical field
The present invention relates to a kind of valve, more particularly, it relates to a kind of ball valve that reliable open and close torque is little that seals.
Background technique
Pneumatic ball valve is a kind of use valve very widely, its structure generally include have valve pocket valve body, be placed in valve pocket inside spheroid, and the valve rod that is connected of spheroid and be placed in valve body and spheroid between valve seat, described valve stem part is placed on valve body outside, valve body outside is provided with the operation drive unit of actuate valve stem rotation, and operation drive unit actuate valve stem drives 90 ° of rotations of spheroid to make ball valve reach the switching of opening and closing.The valve base sealing structure of tradition fixing ball valve and force analysis are as shown in Figure 1, in Fig. 1,1A is spheroid, 2A is valve seat insert, 3A is valve seat, 4A is spring, 5A is valve body, and 6A is the sealing between valve body and valve seat, and the sealing between spheroid and valve seat insert normally relies on the pretightening force of spring and acts on making a concerted effort of valve seat these two power of medium power behind.Conventionally the pretightening force of spring is only used to guarantee fitting tightly of spheroid and valve seat insert, plays initial seal action.The cross section of valve seat is equivalent to a piston, by change the design of valve seat can change the medium power on valve seat of acting on or size, the differential pressure area that increases valve seat can increase the thrust of medium.In order to improve the spheroid of ball valve and the sealability between valve seat insert, by increasing, act on valve seat medium power behind and can realize.Yet, acting on valve seat medium power behind larger, the adhesive force between spheroid and valve seat insert is larger, and the frictional force between them is also larger, just needs larger steering force, or need larger driving mechanism during Open valve.In addition, when the sealing force between spheroid and valve seat insert is excessive, when Open valve, easily cause the damage of valve sealing face, while particularly containing solid particle in medium, more easily damage.In a word, from improving the angle of valve base seal property, need to increase valve seat medium thrust behind, but, from reducing the open and close torque of valve and the angle that prevents the damage of sealing surface, need to reduce valve seat medium thrust behind, therefore, this is conflict, and this contradiction is perplexing the design of ball valve for a long time.
Summary of the invention
The deficiency existing for prior art, the object of the present invention is to provide a kind of seal reliable and the little ball valve of open and close torque.
For achieving the above object, the invention provides following technological scheme: a kind ofly seal the ball valve that reliable open and close torque is little, comprise the valve body with valve pocket, be placed in the spheroid of valve pocket inside, and the valve rod that spheroid is connected and be placed in valve body and spheroid between valve seat sealing mechanism, valve pocket both sides respectively with inlet passage and outlet passage UNICOM, described valve stem part is placed on valve body outside, valve body outside is provided with the Pneumatic actuator of actuate valve stem rotation, it is characterized in that: described valve seat sealing mechanism comprises ring valve holder assembly and three-way diverter valve, described body cavity wall is provided with opening towards the ring valve holder assembly chamber of spheroid, the relative spheroid of described valve component is slidably disposed in ring valve holder assembly chamber, described valve component and ring valve holder assembly chamber air-tight fit form similar piston structure, a described valve body dorsad side of spheroid is provided with pretension elastic component, described valve body is provided with and the valve component valve support chamber passage that the ring valve holder assembly chamber conducting of spheroid one side is connected dorsad, three interfaces of described three-way diverter valve respectively with valve support chamber passage, inlet passage and outlet passage UNICOM, under ball valve closed condition, described inlet passage is through three-way diverter valve and described valve support chamber passage UNICOM, when ball valve is opened, described valve support chamber passage is through three-way diverter valve and outlet passage UNICOM.
By adopting technique scheme, when spheroid is in closed position, be that ball valve is when close, in order to ensure valve reliable sealing, handle three-way diverter valve, make valve support chamber passage and inlet passage UNICOM and disconnect with outlet passage, now, the medium of valve inlet side elevated pressures enters into ring valve holder assembly chamber, pressure medium promotes valve component and is affixed to spheroid, thereby forms tight sealing.When needs are opened, first switching three-way selector valve, make valve support chamber passage and outlet passage UNICOM and disconnect with inlet passage, now, the pressure that pressure in ring valve holder assembly chamber is lower with valve export side is identical, the pressure of valve component both sides is in a basic balance, the pressure that valve component is affixed to spheroid only comes from pretension elastic component, and the elasticity pretightening force of pretension elastic component is conventionally less, now, valve component is very little to the pressure of spheroid and sealing force, the frictional force of sealing surface is also very little, therefore can adopt less torque force to open ball valve, Pneumatic actuator Open valve that can selection of small, reduced the volume of valve, reduced cost, in addition, due to when the Open valve, the sealing force of valve component and spheroid is very little, therefore, is not easy to cause the damage of ball seal face and valve seat insert, has extended working life, has solved and has opened and closed the contradiction between torsion and ball valve sealing performance.
The present invention is further set to: described ring valve holder assembly chamber is that the approximate rectangular annular groove in cross section forms, described valve component comprises the ring valve seat body that sectional shape and annular groove cross section match and is embedded the valve seat insert on ring valve seat body, on the inside-and-outside ring sidewall of described ring valve seat body, being equipped with seal ring contacts and forms described piston structure with the sidewall sealing in ring valve holder assembly chamber, sealing surface and the spheroid of described valve seat insert are affixed, described ring valve seat body is evenly provided with a plurality of spring cavity volumes with being provided with on the opposing face of valve seat insert, in described spring cavity volume, be provided with Compress Spring and form described pretension elastic component, on described valve body, the position in close ring valve holder assembly chamber is provided with the pipeline of annular groove bottom UNICOM and forms described valve support chamber passage.
By adopting ring valve holder assembly chamber and the valve component of said structure, relatively simple for structure, easy to make.
The present invention is further set to: in the pipeline of described three-way diverter valve and inlet passage and outlet passage UNICOM, be provided with filtrating equipment.
Consider under some operating mode, flowing medium in pipe-line system contains solid impurity, by taking to be provided with filtrating equipment or piston mechanism in the pipeline of three-way diverter valve and inlet passage and outlet passage UNICOM, can effectively prevent that solid impurity from entering into three-way diverter valve and ring valve holder assembly cavity.
Accompanying drawing explanation
Fig. 1 is existing ball seat portion structure sectional view;
Fig. 2 is the stressed schematic diagram in existing ball seat position;
Fig. 3 is specific embodiment of the invention structural representation;
Fig. 4 is specific embodiment of the invention valve seat pressure control section pipeline connection diagram;
Fig. 5 is valve seat pressure control section of the present invention structural representation while being provided with piston;
Embodiment
As Fig. 3, shown in 4, seal the ball valve that reliable open and close torque is little and comprise the valve body 1 with valve pocket, be placed in the spheroid 2 of valve pocket inside, and the valve rod 3 that spheroid 2 is connected and be placed in valve body 1 and spheroid 2 between valve seat sealing mechanism, valve pocket both sides respectively with inlet passage 4 and outlet passage 5 UNICOMs, described valve rod 3 parts are placed on valve body 1 outside, valve body 1 outside is provided with the operation drive unit 6 of actuate valve stem 3 rotations, described valve seat sealing mechanism comprises ring valve holder assembly and three-way diverter valve 7, described valve body 1 internal chamber wall is provided with opening towards the ring valve holder assembly chamber 8 of spheroid 2, the relative spheroid 2 of described valve component is slidably disposed in ring valve holder assembly chamber 8, described valve component and ring valve holder assembly chamber 8 air-tight fit form similar piston structure, a described valve body 1 dorsad side of spheroid 2 is provided with pretension elastic component 9, described valve body 1 is provided with and the valve component valve support chamber path 10 that ring valve holder assembly chamber 8 conductings of spheroid 2 one sides are connected dorsad, three interfaces of described three-way diverter valve 7 respectively with valve support chamber path 10, inlet passage 4 and outlet passage 5 UNICOMs, under valve closing state, described inlet passage 4 is through three-way diverter valves 7 and described valve support chamber path 10 UNICOM, when valve opening, described valve support chamber path 10 is through three-way diverter valve 7 and outlet passage 5 UNICOMs.In this specific embodiment, described ring valve holder assembly chamber 8 is that the approximate rectangular annular groove in cross section forms, described valve component comprises the ring valve seat body 11 that sectional shape and annular groove cross section match and is embedded the valve seat insert 12 on ring valve seat body 11, on the inside-and-outside ring sidewall of described ring valve seat body 11, being equipped with seal ring 13 contacts and forms described piston structure with the sidewall sealing in ring valve holder assembly chamber 8, the sealing surface of described valve seat insert 12 and spheroid 2 are affixed, described ring valve seat body 11 is evenly provided with a plurality of spring cavity volumes 14 with being provided with on the opposing face of valve seat insert 12, general 3-6, in described spring cavity volume 14, be provided with Compress Spring, the free length of Compress Spring is slightly longer than the degree of depth of spring cavity volume 14, the bottom that two ends are against respectively spring cavity volume 14 and annular groove forms described pretension elastic component 9.Described pretension elastic component 9 also can as rubber, consider that the elastic module of spring is large, flexibly movable for other elastic materials form, and the present embodiment is preferred.In order to prevent that ring valve seat body 11 from coming off, the opening in described ring valve holder assembly chamber 8 is preferably provided with annular pressing plate 16; On described valve body 1, the position in close ring valve holder assembly chamber 8 is provided with the pipeline of annular groove bottom UNICOM and forms described valve support chamber path 10.Consider under some operating mode, flowing medium in pipe-line system contains solid impurity, for fear of impurity, enter in three-way diverter valve 7 and ring valve holder assembly chamber 8 and cause cisco unity malfunction, as shown in Figure 5, in the pipeline of described three-way diverter valve 7 and inlet passage 4 and outlet passage 5 UNICOMs, be provided with filtrating equipment or piston apparatus 17, left and right balance by piston in piston apparatus 17 moves, make the ring valve holder assembly chamber 8 can be as required and the pressure balance of valve inlet end or outlet end, effectively prevent that solid impurity from entering into three-way diverter valve 7 and ring valve holder assembly chamber 8 simultaneously.
These ring valve holder assembly chamber 8 and ring valve seat body 11 sectional shapes that seal the ball valve that reliable open and close torque is little are not unique, as long as the central axes of the cylndrical surface at two annular sidewall place or parallel.
Claims (4)
1. one kind seals the little ball valve of reliable open and close torque, comprise the valve body with valve pocket, be placed in the spheroid of valve pocket inside, and the valve rod that spheroid is connected and be placed in valve body and spheroid between valve seat sealing mechanism, valve pocket both sides respectively with inlet passage and outlet passage UNICOM, described valve stem part is placed on valve body outside, valve body outside is provided with the operation drive unit of actuate valve stem rotation, it is characterized in that: described valve seat sealing mechanism comprises ring valve holder assembly and three-way diverter valve, described body cavity wall is provided with opening towards the ring valve holder assembly chamber of spheroid, the relative spheroid of described valve component is slidably disposed in ring valve holder assembly chamber, described valve component and ring valve holder assembly chamber air-tight fit form similar piston structure, a described valve body dorsad side of spheroid is provided with pretension elastic component, described valve body is provided with and the valve component valve support chamber passage that the ring valve holder assembly chamber conducting of spheroid one side is connected dorsad, three interfaces of described three-way diverter valve respectively with valve support chamber passage, inlet passage and outlet passage UNICOM, under ball valve closed condition, described inlet passage is through three-way diverter valve and described valve support chamber passage UNICOM, when ball valve is opened, described valve support chamber passage is through three-way diverter valve and outlet passage UNICOM.
2. the little ball valve of the reliable open and close torque of sealing according to claim 1, it is characterized in that: described ring valve holder assembly chamber is that the approximate rectangular annular groove in cross section forms, described valve component comprises the ring valve seat body that sectional shape and annular groove cross section match and is embedded the valve seat insert on ring valve seat body, on the inside-and-outside ring sidewall of described ring valve seat body, being equipped with seal ring contacts and forms described piston structure with the sidewall sealing in ring valve holder assembly chamber, sealing surface and the spheroid of described valve seat insert are affixed, described ring valve seat body is evenly provided with a plurality of spring cavity volumes with being provided with on the opposing face of valve seat insert, in described spring cavity volume, be provided with Compress Spring and form described pretension elastic component, on described valve body, the position in close ring valve holder assembly chamber is provided with the pipeline of annular groove bottom UNICOM and forms described valve support chamber passage.
3. the little ball valve of the reliable open and close torque of sealing according to claim 1, is characterized in that: in the pipeline of described three-way diverter valve and inlet passage and outlet passage UNICOM, be provided with filtrating equipment.
4. the little ball valve of the reliable open and close torque of sealing according to claim 1, is characterized in that: in the pipeline of described three-way diverter valve and inlet passage and outlet passage UNICOM, be provided with piston apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408824.3A CN102878316B (en) | 2012-10-23 | 2012-10-23 | Ball valve reliable in sealing and low in opening-closing torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408824.3A CN102878316B (en) | 2012-10-23 | 2012-10-23 | Ball valve reliable in sealing and low in opening-closing torque |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102878316A CN102878316A (en) | 2013-01-16 |
| CN102878316B true CN102878316B (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210408824.3A Active CN102878316B (en) | 2012-10-23 | 2012-10-23 | Ball valve reliable in sealing and low in opening-closing torque |
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Families Citing this family (9)
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| CN103727261A (en) * | 2013-12-31 | 2014-04-16 | 郝思宏 | Low-torque abrasion-free forced sealing fixed ball valve |
| CN107842627B (en) * | 2017-11-02 | 2024-03-12 | 建湖县裕祥机械制造有限公司 | Hard seal ball valve |
| CN109058501B (en) * | 2018-09-04 | 2019-10-25 | 杭州金山仪表阀业有限公司 | A kind of ball valve |
| CN110805716B (en) * | 2019-11-29 | 2024-05-28 | 中国船舶重工集团公司第七一九研究所 | Ball valve with back pressure unloading structure |
| CN110822119B (en) * | 2019-11-29 | 2024-05-28 | 中国船舶重工集团公司第七一九研究所 | Hydraulic drive ball valve with back pressure unloading device |
| CN111089183B (en) * | 2019-12-20 | 2020-09-08 | 浙江中德自控科技股份有限公司 | Pneumatic sealing combined control valve |
| CN111577929A (en) * | 2020-04-30 | 2020-08-25 | 方正阀门集团股份有限公司 | Ball valve with DBB and DIB functions exchanged |
| CN111734840B (en) * | 2020-07-06 | 2022-08-16 | 四川精控阀门制造有限公司 | Fixed ball valve with spare wheel valve seat |
| CN113063000B (en) * | 2021-03-15 | 2024-05-03 | 滨州永泰不锈钢制品股份有限公司 | Submarine remote control three-way ball valve with intracavity product self-cleaning structure |
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| CN202834165U (en) * | 2012-10-23 | 2013-03-27 | 浙江超达阀门股份有限公司 | Ball valve reliable in seal and small in opening and closing torque |
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| CN2557763Y (en) * | 2002-06-28 | 2003-06-25 | 浙江超达阀门有限公司 | Hard-soft double-seal ball valve |
| CN201284844Y (en) * | 2008-11-07 | 2009-08-05 | 朱崇新 | Non-abrasion ash-discharging ball valve |
| CN101629640A (en) * | 2009-08-12 | 2010-01-20 | 昆山维萨阀门有限公司 | Pilot-operated type hard seal fixing ball valve |
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| CN102878316A (en) | 2013-01-16 |
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Owner name: CHAODA VALVE GROUP CO., LTD. Free format text: FORMER NAME: ZHEJIANG CHAODA VALVE CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: Jiangbei Avenue Oubei town of Yongjia County of Wenzhou City, Zhejiang province 325100 Patentee after: Chaoda Valve Group Co., Ltd. Address before: Jiangbei Avenue Oubei town of Yongjia County of Wenzhou City, Zhejiang province 325100 Patentee before: Zhejiang Chaoda Valve Co., Ltd. |