CN105840857A - Rotary four-eccentricity ball valve - Google Patents
Rotary four-eccentricity ball valve Download PDFInfo
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- CN105840857A CN105840857A CN201610412786.7A CN201610412786A CN105840857A CN 105840857 A CN105840857 A CN 105840857A CN 201610412786 A CN201610412786 A CN 201610412786A CN 105840857 A CN105840857 A CN 105840857A
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- 238000007789 sealing Methods 0.000 claims abstract description 79
- 238000012856 packing Methods 0.000 claims abstract description 21
- 238000001125 extrusion Methods 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Taps Or Cocks (AREA)
Abstract
本发明公开了一种旋转式四偏心球阀，包括阀体、上、下阀杆、球体、阀座、轴承、弹簧、密封圈、填料密封结构，是一种旋转式球阀；球体位于阀体之中，球体与阀座之间设置有弹簧，阀体上设置有端盖和底盖，阀体与两个阀座之间通过螺纹连接，阀杆与球体之间也通过螺纹连接，球体与阀体之间设置有密封圈，阀杆与阀体之间设置有填料密封结构。本发明有四个偏心距离：阀杆中心与密封面接触的偏心、阀杆中心与阀体中心的偏心、密封接触面与阀体通道中心垂直的角度偏心、阀座的回转中心与阀座密封面截面素线形成的可以使球体啮合角度可调的偏心。本发明可减小密封副之间的磨损、降低启闭力矩、提高球阀寿命。
The invention discloses a rotary four-eccentric ball valve, which comprises a valve body, upper and lower valve stems, a ball, a valve seat, a bearing, a spring, a sealing ring, and a packing sealing structure, and is a rotary ball valve; the ball is located between the valve body Among them, a spring is provided between the ball and the valve seat, and an end cover and a bottom cover are provided on the valve body. The valve body and the two valve seats are connected by threads, and the valve stem and the ball are also connected by threads. A sealing ring is arranged between the body, and a packing sealing structure is arranged between the valve stem and the valve body. The present invention has four eccentric distances: the eccentricity between the center of the valve stem and the sealing surface, the eccentricity between the center of the valve stem and the center of the valve body, the eccentricity of the angle between the sealing contact surface and the center of the channel of the valve body, the center of rotation of the valve seat and the sealing of the valve seat. The eccentricity formed by the plain line of the surface section can make the meshing angle of the sphere adjustable. The invention can reduce the abrasion between the sealing pairs, reduce the opening and closing torque, and improve the service life of the ball valve.
Description
技术领域 technical field
本发明属于农业机械技术领域，涉及一种四偏心球阀，特别涉及一种具有减小密封副之间的磨损、降低启闭力矩、提高球阀寿命等特点的偏心球阀。 The invention belongs to the technical field of agricultural machinery and relates to a four-eccentric ball valve, in particular to an eccentric ball valve with the characteristics of reducing wear between sealing pairs, reducing opening and closing torque, and improving the service life of the ball valve.
背景技术 Background technique
由于良好的密封性和流量特性，球阀在一些行业应用广泛，如造纸、天然气、高压领域等。球阀由旋塞阀演变而来，它的启闭件是一个球体，利用球体绕阀杆的轴线旋转90°实现阀门的开启和关闭，可以切断、分配和改变介质流动方向。相比于蝶阀，球阀具有最低的流阻，密封性能好，可应用于腐蚀性介质和低沸点液体中，实现快速启闭，球形关闭件能在边界位置上自动定位，在全开和全闭时，球体和阀座的密封面与介质隔离，结构紧凑、重量轻，阀体对称，能承受来自管道的应力和关闭时的高压差，并且寿命长。 Due to good sealing and flow characteristics, ball valves are widely used in some industries, such as paper making, natural gas, high pressure fields, etc. The ball valve is evolved from the plug valve. Its opening and closing part is a sphere. The ball is rotated 90° around the axis of the valve stem to realize the opening and closing of the valve, which can cut off, distribute and change the flow direction of the medium. Compared with butterfly valves, ball valves have the lowest flow resistance and good sealing performance. They can be used in corrosive media and low-boiling liquids to achieve rapid opening and closing. The spherical closing member can be automatically positioned on the boundary position. At the same time, the sealing surface of the ball and the valve seat is isolated from the medium, the structure is compact, the weight is light, the valve body is symmetrical, it can withstand the stress from the pipeline and the high pressure difference when it is closed, and it has a long life.
对于不偏心球阀，球体和阀座始终处于挤压状态，承受的应力大，磨损快，并且由于密封材料的使用，使得球阀在温度和压力上受到限制。对于单偏心球阀，仍有挤压、刮擦等现象的存在，使用不广。对于双偏心球阀，减小了磨损和启闭力矩，消除了一定的挤压、刮擦现象。对于三偏心球阀，在双偏心的基础上，进一步改善了密封条件，有着很好的防泄漏功能。综上所述，虽然目前已有的偏心球阀做了进一步改善，但是在压力、温度上还存在一定的问题。 For non-eccentric ball valves, the ball and the valve seat are always in a state of extrusion, which bears high stress and wears quickly, and due to the use of sealing materials, the temperature and pressure of the ball valve are limited. For single eccentric ball valves, there are still phenomena such as extrusion and scratching, and they are not widely used. For the double eccentric ball valve, the wear and opening and closing torque are reduced, and certain extrusion and scraping phenomena are eliminated. For the triple eccentric ball valve, on the basis of the double eccentric, the sealing condition is further improved, and it has a good anti-leakage function. To sum up, although the existing eccentric ball valves have been further improved, there are still certain problems in pressure and temperature.
球阀的阀座密封圈材料主要是聚四氟乙烯，由于聚四氟乙烯具有较高的膨胀系数、对冷流的敏感性和不良的热传导性等特点，对于阀座密封的设计，必须考虑这些因素，这使得球阀的设计也存在一定的问题。 The material of the seat seal ring of the ball valve is mainly polytetrafluoroethylene. Since polytetrafluoroethylene has the characteristics of high expansion coefficient, sensitivity to cold flow and poor thermal conductivity, these must be considered in the design of the seat seal. Factors, which makes the design of ball valves also have certain problems.
综上所述，现有技术中球阀存在磨损严重、承受压力大、密封性能差等问题。目前在球阀中没有提及过四偏心设计，只有在蝶阀中才有类似方面的研究，通过对蝶阀的四偏心设计，可以有效减小磨损、降低启闭力矩和防止工作介质的泄漏，因此本发明将四偏心设计用于球阀中。 To sum up, the ball valves in the prior art have problems such as serious wear, high pressure, and poor sealing performance. At present, the four-eccentric design has not been mentioned in the ball valve, and only in the butterfly valve has similar research. Through the four-eccentric design of the butterfly valve, it can effectively reduce wear, reduce the opening and closing torque and prevent the leakage of the working medium. Therefore, this paper The invention uses the four eccentric design in the ball valve.
发明内容 Contents of the invention
本发明的目的在于提供一种旋转式四偏心球阀，以有效减小磨损、降低启闭力矩、提高球阀寿命、提高调节流量能力。 The object of the present invention is to provide a rotary four-eccentric ball valve, which can effectively reduce wear, reduce opening and closing torque, increase the service life of the ball valve, and improve the ability to adjust flow.
为解决上述技术问题，本发明采用的具体技术方案如下： In order to solve the problems of the technologies described above, the specific technical solutions adopted in the present invention are as follows:
一种旋转式四偏心球阀，包括阀体(3)、上阀杆(10)、下阀杆(7)、球体(8)、阀座(4)、弹簧(1)、密封圈(2)、填料密封装置(9)、螺栓(5)、螺母(6)；球体(8)位于阀体(3)之中，球体(8)与阀座(4)之间设置有弹簧(1)，阀体(3)上设置有端盖和底盖，阀体(3)与两个阀座(4)之间通过螺栓(5)和螺母(6)连接，上阀杆(10)和下阀杆(7)与球体(8)之间通过螺纹连接，球体(8)与阀体(3)之间设置有密封圈(2)，上阀杆(10)和下阀杆(7)与阀体(3)之间设置有填料密封装置(9)；所述球阀设置有偏心距离，第一偏心是阀杆中心与密封接触面的偏心，第二偏心是阀杆中心与阀体中心的偏心； A rotary four-eccentric ball valve, comprising a valve body (3), an upper valve stem (10), a lower valve stem (7), a ball (8), a valve seat (4), a spring (1), and a sealing ring (2) , packing sealing device (9), bolt (5), nut (6); the ball (8) is located in the valve body (3), and a spring (1) is arranged between the ball (8) and the valve seat (4), The valve body (3) is provided with an end cover and a bottom cover, the valve body (3) and the two valve seats (4) are connected by bolts (5) and nuts (6), and the upper valve stem (10) and the lower valve The rod (7) and the sphere (8) are threadedly connected, a sealing ring (2) is arranged between the sphere (8) and the valve body (3), and the upper valve rod (10) and the lower valve rod (7) are connected to the valve A packing sealing device (9) is provided between the bodies (3); the ball valve is provided with an eccentric distance, the first eccentricity is the eccentricity between the center of the valve stem and the sealing contact surface, and the second eccentricity is the eccentricity between the center of the valve stem and the center of the valve body ;
其特征在于：还包括第三偏心和第四偏心； It is characterized in that: it also includes a third eccentricity and a fourth eccentricity;
所述第三偏心是密封接触面与阀体通道中心垂直的角度偏心； The third eccentricity is the angular eccentricity of the sealing contact surface perpendicular to the center of the valve body channel;
所述第四偏心是阀座的回转中心与密封圈截面素线形成的可以使球体啮合角度可调的偏心。 The fourth eccentricity is the eccentricity formed by the center of rotation of the valve seat and the plain line of the sealing ring section, which can make the meshing angle of the balls adjustable.
所述第一偏心设置在阀杆中心与密封面接触之间，使密封副上、下端偏离回转中心，在阀门启闭过程中可以防止球体与阀体之间产生过度挤压。 The first eccentricity is set between the center of the valve stem and the sealing surface, so that the upper and lower ends of the sealing pair deviate from the center of rotation, which can prevent excessive extrusion between the ball and the valve body during the opening and closing process of the valve.
所述第二偏心设置在阀杆中心与阀体中心之间；开启阀门后，球体能快速脱离阀体，减小了球体与阀体之间的磨损和刮擦，降低了开启力矩，从而缓解磨损现象，提高阀门寿命。 The second eccentricity is set between the center of the valve stem and the center of the valve body; after the valve is opened, the ball can quickly break away from the valve body, which reduces the wear and scratch between the ball and the valve body, reduces the opening torque, and thus relieves the Wear phenomenon, improve valve life.
所述第三偏心设置在密封接触面与阀体通道中心之间；第三偏心改变了密封副的密封原理，由位置密封变为扭力密封，通过依靠阀座的接触面压来起到防泄漏的密封效果。 The third eccentricity is set between the sealing contact surface and the center of the valve body channel; the third eccentricity changes the sealing principle of the sealing pair, from positional sealing to torque sealing, and prevents leakage by relying on the contact surface pressure of the valve seat sealing effect.
所述第四偏心为所述阀座的回转中心与密封圈截面素线形成的使球体啮合角度可调的偏心，且该啮合角为可变的任意值，可以根据工况要求设计不同的啮合角，减小开启力矩，有利于阀门的开启。 The fourth eccentricity is the eccentricity formed by the center of rotation of the valve seat and the plain line of the seal ring section to make the meshing angle of the ball adjustable, and the meshing angle is any variable value, and different meshing angles can be designed according to the requirements of the working conditions. Angle, reduce the opening torque, is conducive to the opening of the valve.
所述阀座的密封面堆焊有硬质合金；球体与阀体的接触面也堆焊有硬质合金。 Hard alloy is surfacing on the sealing surface of the valve seat; hard alloy is also surfacing on the contact surface between the ball and the valve body.
所述密封圈为斜坡式，材料为软质密封材料聚四氟乙烯，聚四氟乙烯有良好的物理和化学性能，且泄漏率很低，使用环境温度低于250℃。 The sealing ring is slope type, and the material is polytetrafluoroethylene, a soft sealing material. Polytetrafluoroethylene has good physical and chemical properties, and the leakage rate is very low, and the operating environment temperature is lower than 250°C.
所述上阀杆和下阀杆与阀体之间设置有填料密封结构，该填料密封结构由填料压板、填料压套、填料、隔环和填料垫组成，用以防止介质从移动的阀杆和阀体的间隙中发生泄漏。 A packing sealing structure is arranged between the upper valve stem, the lower valve stem and the valve body. The packing sealing structure is composed of a packing pressure plate, a packing gland, a packing, a spacer ring and a packing pad to prevent the medium from moving from the valve stem. Leakage occurs in the gap between the valve and the valve body.
所述阀体与阀座之间设置有弹簧，弹簧的材料选用65Mn弹簧钢；所述65Mn弹簧钢具有强度高、硬度高、耐磨性好等特点，用以防止阀体和阀座之间因剧烈摩擦而降低球阀的寿命。 A spring is arranged between the valve body and the valve seat, and the material of the spring is 65Mn spring steel; the 65Mn spring steel has the characteristics of high strength, high hardness, and good wear resistance, and is used to prevent the gap between the valve body and the valve seat. The service life of the ball valve is reduced due to severe friction.
本发明的工作过程如下：本发明球阀是通过上阀杆带动球体旋转90℃而实现阀门开启或关闭的，并且通过四个偏心距离来达到减小磨损、降低启闭力矩的作用。通过第一偏心，使阀杆中心偏离密封面接触的对称中心，在阀门启闭过程中可防止球体阀芯与阀座接触而产生过度挤压。通过第二偏心，使阀杆中心偏离阀体中心，从而减小阀杆与阀体的磨损，并且降低启闭力矩，消除一定的挤压、刮擦现象。通过第三偏心，使密封接触面与阀体通道中心产生一垂直的角度偏心，在第一、二偏心的基础上，进一步改善了密封条件，有着很好的防泄漏功能。通过第四偏心，使阀座的回转中心偏离阀座密封面的中心，产生了一个啮合角，使得阀门更容易开启，进一步减小启闭力矩，从而更经济、节能。 The working process of the present invention is as follows : the ball valve of the present invention realizes the opening or closing of the valve by driving the ball to rotate 90°C through the upper valve stem, and reduces wear and opening and closing torque through four eccentric distances. Through the first eccentricity, the center of the valve stem deviates from the symmetrical center of the sealing surface contact, which can prevent the ball valve core from contacting the valve seat and causing excessive extrusion during the opening and closing process of the valve. Through the second eccentricity, the center of the valve stem deviates from the center of the valve body, thereby reducing the wear of the valve stem and the valve body, reducing the opening and closing torque, and eliminating certain extrusion and scraping phenomena. Through the third eccentricity, a vertical angular eccentricity is generated between the sealing contact surface and the center of the valve body channel. On the basis of the first and second eccentricities, the sealing condition is further improved, and it has a good leak-proof function. Through the fourth eccentricity, the center of rotation of the valve seat deviates from the center of the sealing surface of the valve seat, resulting in an meshing angle, which makes the valve easier to open and further reduces the opening and closing torque, which is more economical and energy-saving.
本发明具有有益效果。本发明设置有四个偏心，第一偏心是阀杆中心与密封面接触的偏心，第二偏心是阀杆中心与阀体中心的偏心，第三偏心是密封接触面与阀体通道中心垂直的角度偏心，第四偏心是阀座的回转中心与阀座密封面截面素线形成的可以使球体啮合角度可调的偏心；本发明通过对球阀设置四个偏心，来达到减小密封副之间的磨损、降低启闭力矩、提高球阀寿命的目的。 The invention has beneficial effects . The present invention is provided with four eccentricities, the first eccentricity is the eccentricity between the center of the valve stem and the sealing surface, the second eccentricity is the eccentricity between the center of the valve stem and the center of the valve body, and the third eccentricity is the verticality between the sealing contact surface and the center of the valve body channel Angle eccentricity, the fourth eccentricity is the eccentricity formed by the center of rotation of the valve seat and the plain line of the sealing surface of the valve seat, which can make the meshing angle of the ball adjustable; the present invention reduces the gap between the sealing pairs by setting four eccentricities for the ball valve. wear, reduce the opening and closing torque, and improve the life of the ball valve.
附图说明 Description of drawings
图1为本发明球阀装配图主视图； Fig. 1 is the front view of the assembly drawing of the ball valve of the present invention;
图2为本发明球阀装配图左视图； Fig. 2 is the left side view of the assembly drawing of the ball valve of the present invention;
图3为本发明球阀装配图俯视图； Fig. 3 is a top view of the assembly drawing of the ball valve of the present invention;
图4为本发明球阀装配图局部剖视图； Fig. 4 is a partial cross-sectional view of the assembly drawing of the ball valve of the present invention;
图5为本发明阀座主视图和俯视图； Fig. 5 is a front view and a top view of the valve seat of the present invention;
图6为本发明阀座左视图； Fig. 6 is a left view of the valve seat of the present invention;
图7为本发明球体三视图； Fig. 7 is three views of the sphere of the present invention;
图8为本发明阀体主视图； Fig. 8 is the front view of the valve body of the present invention;
图9为本发明阀体左视图； Fig. 9 is a left side view of the valve body of the present invention;
图10为本发明阀体俯视图； Fig. 10 is a top view of the valve body of the present invention;
图11为本发明上阀杆零件图； Fig. 11 is a part diagram of the upper valve stem of the present invention;
图12为本发明下阀杆零件图； Fig. 12 is a part diagram of the lower valve stem of the present invention;
图13为本发明密封圈零件图。 Fig. 13 is a part diagram of the sealing ring of the present invention.
具体实施方式 detailed description
下面结合附图，对本发明的技术方案做进一步详细说明。 The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.
如图1所示的一种旋转式四偏心球阀，主要由阀体3、上阀杆10、下阀杆7、球体8、阀座4、弹簧1、密封圈2、填料密封装置9、螺栓5、螺母6组成；球体8位于阀体3之中，球体8与阀座4之间设置有弹簧1，阀体3上设置有端盖和底盖，阀体3与两个阀座4之间通过螺栓5和螺母6连接，上阀杆10和下阀杆7与球体8之间通过螺纹连接，球体8与阀体3之间设置有密封圈2，上阀杆10和下阀杆7与阀体3之间设置有填料密封装置9；所述球阀设置有偏心距离，第一偏心是阀杆中心与密封面接触的偏心，第二偏心是阀杆中心与阀体中心的偏心；第三偏心是密封接触面与阀体通道中心垂直的角度偏心；第四偏心是阀座的回转中心与密封圈截面素线形成的可以使球体啮合角度可调的偏心。 A rotary four-eccentric ball valve as shown in Figure 1 is mainly composed of a valve body 3, an upper valve stem 10, a lower valve stem 7, a ball 8, a valve seat 4, a spring 1, a sealing ring 2, a packing sealing device 9, bolts 5. The nut 6 is composed of; the ball 8 is located in the valve body 3, the spring 1 is arranged between the ball 8 and the valve seat 4, the end cover and the bottom cover are arranged on the valve body 3, and the valve body 3 and the two valve seats 4 The upper valve stem 10, the lower valve stem 7 and the sphere 8 are connected by threads, and a sealing ring 2 is arranged between the sphere 8 and the valve body 3, and the upper valve stem 10 and the lower valve stem 7 There is a packing sealing device 9 between the valve body 3; the ball valve is provided with an eccentric distance, the first eccentricity is the eccentricity between the center of the valve stem and the sealing surface, and the second eccentricity is the eccentricity between the center of the valve stem and the center of the valve body; The third eccentricity is the angle eccentricity of the sealing contact surface perpendicular to the center of the valve body channel; the fourth eccentricity is the eccentricity formed by the center of rotation of the valve seat and the plain line of the sealing ring section, which can make the meshing angle of the ball adjustable.
如图2所示，球体8位于阀体3之中，阀体3上设置有端盖和底盖，上阀杆10和下阀杆7与球体8之间通过螺纹连接，球体8与阀体3之间设置有密封圈2，上阀杆10和下阀杆7与阀体3之间设置有填料密封装置9；且在密封接触面与阀体通道中心之间设置第三偏心；第三偏心改变了密封副的密封原理，由位置密封变为扭力密封，通过依靠阀座的接触面压来起到防泄漏的密封效果；通过设置第四偏心，阀座的回转中心与密封面截面素线形成的使球体啮合角度可调的偏心，且该啮合角为可变的任意值，可以根据工况要求设计不同的啮合角，减小开启力矩，有利于阀门的开启。 As shown in Figure 2, the ball 8 is located in the valve body 3, the valve body 3 is provided with an end cover and a bottom cover, the upper valve stem 10, the lower valve stem 7 and the ball 8 are connected by threads, and the ball 8 and the valve body 3 is provided with a sealing ring 2, and a packing sealing device 9 is provided between the upper valve stem 10 and the lower valve stem 7 and the valve body 3; and a third eccentricity is set between the sealing contact surface and the center of the valve body channel; the third Eccentricity changes the sealing principle of the sealing pair, from positional sealing to torsion sealing, and achieves a leak-proof sealing effect by relying on the contact surface pressure of the valve seat; by setting the fourth eccentricity, the center of rotation of the valve seat and the cross section of the sealing surface The eccentricity formed by the line makes the meshing angle of the ball adjustable, and the meshing angle can be any variable value. Different meshing angles can be designed according to the requirements of the working conditions to reduce the opening torque and facilitate the opening of the valve.
如图3所示，阀体3的端盖上设置有6个直径为12mm的孔，可以与其他零件通过螺栓连接。 As shown in Figure 3, the end cover of the valve body 3 is provided with 6 holes with a diameter of 12mm, which can be connected with other parts by bolts.
如图4所示，阀体3的底盖上设置有4个通孔，可以通过螺栓连接固定在机架上。 As shown in FIG. 4 , the bottom cover of the valve body 3 is provided with four through holes, which can be fixed on the frame by bolts.
如附图5所示，阀座4的外径与阀体3的外径相等，阀座4的轴线与阀体3的轴线理论上在同一条直线上，要保证在一定的同轴度误差范围内，并且阀座4的轴线与球体8的轴线保持一定的偏心距离。 As shown in Figure 5, the outer diameter of the valve seat 4 is equal to the outer diameter of the valve body 3, the axis of the valve seat 4 and the axis of the valve body 3 are theoretically on the same straight line, and a certain coaxiality error must be ensured Within the range, and the axis of the valve seat 4 and the axis of the ball 8 maintain a certain eccentric distance.
如图6所示，阀座4与阀体3接触面之间设置有通孔，通过螺栓(5)和螺母6连接，阀座4外侧也设置有通孔，通过螺栓和螺母与机身连接。 As shown in Figure 6, a through hole is provided between the contact surface of the valve seat 4 and the valve body 3, which are connected by bolts (5) and nuts 6, and a through hole is also provided on the outside of the valve seat 4, which is connected to the body by bolts and nuts .
如图7所示，设置有两个偏心，第一偏心设置在阀杆中心与密封面接触之间，使密封副上、下端偏离回转中心，在阀门启闭过程中可以防止球体8与阀体3之间产生过度挤压；第二偏心设置在阀杆中心与阀体8中心之间；开启阀门后，球体8能快速脱离阀体3，减小了球体8与阀体3之间的磨损和刮擦，降低了开启力矩，从而缓解磨损现象，提高阀门寿命。 As shown in Figure 7, there are two eccentricities, the first eccentricity is set between the center of the valve stem and the sealing surface, so that the upper and lower ends of the sealing pair deviate from the center of rotation, which can prevent the ball 8 from contacting the valve body during the opening and closing process of the valve. 3 produces excessive extrusion; the second eccentricity is set between the center of the valve stem and the center of the valve body 8; after opening the valve, the ball 8 can quickly break away from the valve body 3, reducing the wear between the ball 8 and the valve body 3 And scraping, reducing the opening torque, thereby alleviating wear and improving valve life.
如图8所示，球体8位于阀体3之中，且球体8中心偏离阀体3中心。 As shown in FIG. 8 , the ball 8 is located in the valve body 3 , and the center of the ball 8 deviates from the center of the valve body 3 .
如图9所示，阀体3端盖上设置有通孔，通过螺栓和螺母与其他元件相连。 As shown in FIG. 9 , the end cover of the valve body 3 is provided with a through hole, which is connected with other components through bolts and nuts.
如图10所示，阀体3底盖上设置有通孔，通过螺栓和螺母与其他元件相连。 As shown in FIG. 10 , the bottom cover of the valve body 3 is provided with a through hole, which is connected with other components through bolts and nuts.
如图11所示，上阀杆10上端和下端都设置有M40X1.5的螺纹，上阀杆10的上端与电机通过螺纹连接，给上阀杆10提供动力；上阀杆10的下端与球体8通过螺纹连接，实现上阀杆10与球体8之间的动力传递。 As shown in Figure 11, the upper and lower ends of the upper valve stem 10 are provided with M40X1.5 threads, and the upper end of the upper valve stem 10 is threadedly connected with the motor to provide power for the upper valve stem 10; the lower end of the upper valve stem 10 is connected to the ball 8 realizes the power transmission between the upper valve stem 10 and the ball 8 through threaded connection.
如图12所示，下阀杆7上端和下端都设置有M40X1.5的螺纹，下阀杆7的上端与球体8通过螺纹连接，实现球体8与下阀杆7之间的动力传递；下阀杆7的下端与其他元件通过螺纹连接，实现下阀杆7与其他元件之间的动力传递。 As shown in Figure 12, the upper and lower ends of the lower valve stem 7 are provided with M40X1.5 threads, and the upper end of the lower valve stem 7 is connected to the ball 8 through threads to realize the power transmission between the ball 8 and the lower valve stem 7; The lower end of the valve stem 7 is threadedly connected with other elements to realize the power transmission between the lower valve stem 7 and other elements.
如图13所示，设计的密封圈2为斜坡式，材料为软质密封材料聚四氟乙烯，聚四氟乙烯有良好的物理和化学性能，且泄漏率很低。通过密封圈2的斜坡式设计，阀座的回转中心与密封圈截面素线可以形成使球体啮合角度可调的偏心，且该啮合角为可变的任意值，可以根据工况要求设计不同的啮合角，减小开启力矩，有利于阀门的开启。 As shown in Figure 13, the designed sealing ring 2 is a slope type, and the material is polytetrafluoroethylene, a soft sealing material. Polytetrafluoroethylene has good physical and chemical properties, and the leakage rate is very low. Through the slope design of the seal ring 2, the center of rotation of the valve seat and the plain line of the seal ring section can form an eccentricity that makes the meshing angle of the ball adjustable. The meshing angle reduces the opening torque, which is beneficial to the opening of the valve.
Claims (9)
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| CN201610412786.7A CN105840857A (en) | 2016-06-13 | 2016-06-13 | Rotary four-eccentricity ball valve |
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| CN201610412786.7A CN105840857A (en) | 2016-06-13 | 2016-06-13 | Rotary four-eccentricity ball valve |
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Cited By (1)
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| CN109373009A (en) * | 2018-12-20 | 2019-02-22 | 武汉海王科技有限公司 | A kind of naval vessel ball valve limit switch instruction device |
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Application publication date: 20160810 |