WO2013086841A1 - 电动球阀 - Google Patents

电动球阀 Download PDF

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Publication number
WO2013086841A1
WO2013086841A1 PCT/CN2012/076746 CN2012076746W WO2013086841A1 WO 2013086841 A1 WO2013086841 A1 WO 2013086841A1 CN 2012076746 W CN2012076746 W CN 2012076746W WO 2013086841 A1 WO2013086841 A1 WO 2013086841A1
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WO
WIPO (PCT)
Prior art keywords
valve
valve body
motor
main shaft
electric ball
Prior art date
Application number
PCT/CN2012/076746
Other languages
English (en)
French (fr)
Inventor
王永良
Original Assignee
杭州富阳恒通机电工程有限公司
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Application filed by 杭州富阳恒通机电工程有限公司 filed Critical 杭州富阳恒通机电工程有限公司
Publication of WO2013086841A1 publication Critical patent/WO2013086841A1/zh

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Classifications

    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves

Definitions

  • the present invention relates to the field of switching valves, and in particular to an electric ball valve.
  • the electric ball valve has the shorter time required to open and close, so as to facilitate the control on the one hand, and reduce the coordination work of various parts in the system caused by the delay of the switch on the other hand, so that the electric ball valve and the corresponding equipment The coordination between the two is better.
  • the patent CN2516766Y (the electric ball valve for cement homogenization library) which the applicant applied for in 2001 overcomes the problem that the solenoid valve is frequently caused to be malfunctioning, and then replaces the solenoid valve.
  • the patented electric ball valve spool is a stainless steel ball, through the rotation of the valve core to achieve the opening and closing of the valve, in order to achieve a good seal, stainless steel
  • the ball is matched with three sealing rings, which are respectively located at the air inlet, the air outlet and the connection between the main shaft and the valve body.
  • the motor needs to pass through the transmission device. That is, the large and small gears amplify the torque and drive the main shaft to move the stainless steel ball.
  • the electric ball valve solves the problem that the solenoid valve is frequently switched and easily causes a malfunction, a new problem arises.
  • the amplification time of the large and small gears will lengthen the opening time and the closing time of the electric ball valve, and generally takes more than 2 seconds. This makes the electric ball valve unsuitable for those underfill control systems that need to be opened and closed instantly within 0.5 seconds. Summary of the invention
  • the technical problem to be solved by the present invention is to provide an electric ball valve that can be opened instantaneously and instantly closed.
  • the technical solution of the present invention is to provide an electric ball valve, comprising a valve body, a motor, a protective cover and a circuit board, wherein the valve body has an air inlet, and the other side of the valve body has an air outlet; the valve body is provided with a valve core and a main shaft, a spool is connected to the main shaft; a protective cover is connected to the upper end of the valve body, a motor and a circuit board are arranged in the protective cover, the valve core is a spherical body, and the spherical body is formed by a convex spherical surface and an end surface connected to the main shaft;
  • the main shaft extends from the outside of the valve body to the rotating shaft of the motor, and the rotating shaft passes through the end cover of the other end of the motor; the circuit board is disposed on the end cover; and the rotating shaft is provided on the rotating shaft Piece.
  • the valve core is modified from a stainless steel ball to a spherical body, which reduces the load of the motor, so that the transmission device is not needed to amplify the torque. That is, the large and small gear amplifying torque is no longer needed to drive the spindle, that is to say, the motor is directly connected to the main shaft, which drives the spindle to rotate, and the transmission device is cancelled.
  • the opening time and the closing time of the present invention can be greatly shortened, and the instant opening and the instantaneous closing can be realized, so that the present invention is suitable for the bottom inflation control system which needs to be instantaneously opened and instantly closed within 0.5 seconds.
  • the transmission is eliminated, eliminating the need to worry about gear wear caused by gear teeth.
  • the end surface connected to the main shaft is a flat surface, and a connecting rod is disposed on the plane, and the connecting rod is connected to the main shaft.
  • the connecting rod is connected to the main shaft.
  • the circuit board is provided with a relay, a limit switch and a signal switch; and the limit switch and the signal switch cooperate with the bump block provided on the rotating shaft.
  • the limit switch and the signal switch are triggered by a touch action with the bump on the shaft.
  • the end of the rotating shaft that passes through the end cover is provided with an indicator disc.
  • the valve position switch state of the invention can be clarified by the indicator disc.
  • valve body side is provided with a sealing body that engages with a convex spherical surface of the valve body.
  • the sealing of the valve core to the air inlet or the air outlet can be improved by the cooperation of the sealing body and the spherical surface of the valve core.
  • FIG. 1 is a schematic front view of the present invention.
  • FIG. 2 is a schematic view of the left side structure of the present invention.
  • Figure 3 is an electrical schematic diagram of the present invention.
  • valve body 1, valve body, 2, motor, 3, protective cover, 4, air inlet, 5, air outlet, 6, spool, 7, spindle, 8, circuit board, 9, relay, 10, limit Bit switch, 11, signal switch, 12, indicator disc, 13, seal, 14, flange.
  • an electric ball valve includes a valve body 1, a motor 2, a protective cover 3 and a circuit board 8, the valve body 1 has an air inlet 4 on one side, and the air outlet 5 on the other side of the valve body 1; 1 is provided with a valve core 6 and a main shaft 7, one end of the main shaft 7 is located in a support hole of a support seat at the bottom of the valve body 1, the main shaft 7 is rotatable relative to the support seat, and the valve core 6 is located at the air inlet 4 of the valve body 1.
  • valve core 6 is connected to the main shaft 7; the protective cover 3 is connected to the upper end of the valve body 1, and the motor 2 and the circuit board are arranged in the protective cover 1, the key point is that the valve core 6 is a spherical body , the spherical body consists of a convex spherical surface and a main body
  • the end surface of the shaft 7 is formed; the main shaft 7 extends out of the valve body 1 and is connected to the rotating shaft of the motor 2, and the rotating shaft passes through the end cover of the other end of the motor 2; the circuit board 8 is disposed at the end of the motor 2. Covered; a bumper is provided on the rotating shaft that passes through the end cover.
  • the end surface of the stainless steel spherical body connected to the main shaft 7 is a flat surface, and a connecting rod is arranged on the plane, and one end of the connecting rod is fixed on the plane of the valve core 6.
  • the fixing can be integrally formed by casting the valve core 6.
  • the connecting rod may be welded to the plane of the valve core 6 or the connecting rod and the valve core 6 may be screwed and fixed.
  • the connecting rod is screwed to the plane of the valve core 6 and then welded. fixed.
  • the connection of the connecting rod to the main shaft 7 is accomplished by screwing the other end of the connecting rod to the main shaft.
  • the threaded connection is used to facilitate the replacement of the valve core in the event of a failure of the spool.
  • a sealing body which cooperates with the convex spherical surface of the valve body 6 is provided on the valve body 1 side, and the sealing body is composed of a sealing ring 13 and a steel sleeve. Since the spool 6 is modified from the existing stainless steel ball to a stainless steel spherical body, the weight of the spool is reduced, and only one sealing ring 13 is used, which reduces the friction coefficient of the spool and the sealing ring.
  • the sealing ring 13 and the valve core 6 are disposed on the same side of the valve body 1.
  • the valve core 6 can be disposed on the side of the air inlet 4 or on the side of the air outlet 5, in this embodiment.
  • the valve core 6 is disposed on the side of the air outlet 5, and the convex spherical surface portion of the valve core 6 faces the air outlet 5, and therefore, the sealing ring 13 is also disposed on the side of the air outlet 5 of the valve body 1, and the specific method is
  • the pipe mouth of the tuyere 5 is fixed with a steel sleeve which can be radially adjusted, and the sealing ring 13 is placed in the steel sleeve.
  • the valve core 6 is rotated 90 degrees to close the air outlet 5, the sealing ring 13 is in contact with the convex spherical surface of the valve core 6.
  • the required radial sealing performance is achieved by adjusting the radial position of the steel sleeve to match the tension.
  • the motor 2 in this embodiment is a micro special synchronous motor, and the motor 2 is a double-out shaft motor, that is, the rotating shaft of the motor 2 is respectively passed out from both ends of the motor 2, and one end of the rotating shaft is connected with the spindle 7 for the transmission spindle. 7; The other end passes through the end cover of the motor 2, and a bumper is arranged on the rotating shaft of the end cover to touch the electrical switch on the circuit board 8.
  • the motor 2 is located outside the valve body 1 and fixed to the upper end portion of the valve body 1, and the spool 6 is rotated by the drive spindle 7, which rotates 60 revolutions per minute.
  • valve body 1 of the present invention is a cylindrical structure in which a rectangular parallelepiped or a square or a flange is connected to each other.
  • the valve body 1 is a circle in which the flanges are connected to each other.
  • the circuit board 8 is provided with a relay 9, a limit switch 10, and a signal switch 11; the circuit board 8 is fixed on the end cover of the motor 2, and the limit switch 10 and the signal switch 11 on the circuit board 8 are disposed on the rotating shaft
  • the upper bumps match the action.
  • the relay 9 includes a pair of relay normally closed contacts K1, a pair of relay normally open contacts K2; two limit switches 10, including a valve closing in position limit switch S1, the valve is opened to the position limit switch S2; the signal switch 11 is The valve opens the signal output switch S3.
  • the two limit switches 10 and the signal switch 11 are touched by the mechanical bumps on the rotating shaft. Since it is a conventional technique to set the bumps on the rotating shaft to trigger the electrical switches, the specific operation will not be described again. Not shown.
  • the end of the rotating shaft that passes through the end cover is provided with a dial 12 and a pointer for opening and closing the valve position, and the pointer of the upper portion of the indicating plate 12 is fixed at the top of the rotating shaft. The rotating shaft rotates together.
  • valve body 1 of the present invention is modified from the prior art cast iron to be welded by a steel pipe to a flange and then bolted.
  • the flange 14 is connected to the joint of the air inlet 4 and the air outlet 5, and is connected to the external pipe through the flange 14.
  • the working principle of the invention is as follows: In the case of no external opening signal, under the action of the working power source, the full-closed electric lock is maintained, that is, the air outlet 5 is closed, and the indicator disc 12 is in the fully closed indication position, and the electric indication switch signal is (Relay signal) No output.
  • the relay 9 operates, the motor 2 rotates immediately, and its rotating shaft drives the spindle 7 and the stainless steel valve core 6 to rotate synchronously. After 0.25 seconds, the valve position is in the fully open position, that is, the air outlet 5 is opened. Under the action of the limit switch 10, the motor 2 stops rotating and remains locked, and the electric signal switch 11 is touched.
  • the switch signal output causes the indicator light in the control room of the electric ball valve to be correspondingly indicated. Indicates the fully open position. Conversely, when the power-on signal disappears, the motor 2 immediately reverses. After 0.25 seconds, the motor 2 stops under the action of the reverse limit switch. At this time, the valve position is fully closed and remains fully closed.
  • the specific electrical principle is as follows: As shown in Figure 3, when the turn-on signal is added, the relay 9 acts, the relay normally closed contact K1 opens, and the relay normally open contact K2 closes, at which time the valve opens to the position limit switch S2 normally closed, working The power supply passes from the relay normally open contact K2, the valve opens to the position limit switch S2, the 2-3 winding is the positive winding, and the 1-3 winding is the secondary winding.

Abstract

一种电动球阀包括阀体（1）、电机（2）、保护罩（3）和开关阀自动控制系统，阀体（1）一侧具有进风口（4），阀体（1）另一侧具有出风口（5）。阀体（1）内设有阀芯（6）和主轴（7），阀芯（6）与主轴（7）连接。保护罩（3）与阀体（1）上端部连接，保护罩（3）内设有电机（2）和开关阀自动控制系统，阀芯（6）为球面体，所述球面体由一个凸球面和一个与主轴（7）连接的端面形成。所述主轴（7）延伸出阀体（1）与电机（2）和开关阀自动控制系统连接。该电动球阀可以实现瞬间开启和瞬间关闭。

Description

电动球阀 技术领域 本发明涉及一种开关阀技术领域， 具体讲是一种电动球阀。
背景技术
电动球阀作为一种开关阀， 开启与关闭所需的时间越短越好， 这样一方面 方便控制， 另一方面减少开关机迟延产生的系统内各部分协调工作问题， 使得 电动球阀与相应的设备之间匹协调性更好。
关于电动球阀， 在已公开的专利文献中， 本申请人于 2001 年申请的专利 CN2516766Y (水泥均化库用电动球阀）， 克服了电磁阀频繁开关易造成故障的 问题， 在此后开始取代电磁阀广泛运用于水泥生产的生料均化库底充气控制系 统， 该专利的电动球阀的阀芯是一个不锈钢球， 通过阀芯的转动来实现阀门的 开启和关闭， 为了达到良好的密封性， 不锈钢球与三个密封圈配合， 三个密封 圈分别位于进风口、 出风口以及主轴与阀体的连接处， 由于不锈钢球质量重， 且与三个密封圈的摩擦系数大，电机需要通过传动装置即大小齿轮来放大力矩， 带动主轴从而使不锈钢球动作。 虽然该电动球阀解决了电磁阀频繁开关易造成 故障的问题， 但产生了一个新问题， 通过大小齿轮放大力矩会将电动球阀阀门 的开启时间和关闭时间拉长， 一般需要 2秒以上的时间， 从而使得电动球阀不 能适用于那些需要在 0.5秒以内瞬间打开和瞬间关闭的库底充气控制系统。 发明内容
本发明所要解决的技术问题是， 提供一种可以瞬间开启和瞬间关闭的电动 球阀。
本发明的技术解决方案是， 提供一种电动球阀， 包括阀体、 电机、 保护罩 和线路板， 阀体一侧具有进风口， 阀体另一侧具有出风口； 阀体内设有阀芯和 主轴， 阀芯与主轴连接； 保护罩与阀体上端部连接， 保护罩内设有电机和线路 板， 阀芯为球面体， 所述球面体由一个凸球面和一个与主轴连接的端面形成； 所述主轴延伸出阀体外与电机的转轴连接， 所述的转轴从电机另一端的端盖穿 出； 所述线路板设在端盖上； 所述从端盖穿出的转轴上设有碰块。
采用以上结构后与现有技术相比， 本发明具有以下优点： 将阀芯由不锈钢 球改进为球面体，减小了电机的负荷，这样就不需要再用传动装置来放大力矩， 即不再需要大小齿轮放大力矩来带动主轴运转，也就是说电机直接与主轴连接， 带动主轴旋转， 取消了传动装置。 这样就可以使本发明的开启时间和关闭时间 大幅缩短， 实现瞬间开启和瞬间关闭， 使得本发明适用于需要在 0.5秒内瞬间 开启和瞬间关闭的库底充气控制系统。 另外， 取消了传动装置， 不用再担心齿 轮打齿引起的齿轮磨损问题。
作为优选，所述的与主轴连接的端面为一平面，并在平面上设有一连接杆， 所述连接杆与主轴连接。 通过连接杆与主轴的连接， 可以通过主轴带动阀芯的 转动。
作为优选， 所述的线路板上设有继电器、 限位开关、 信号开关； 所述限位 开关和信号开关与设在转轴上的碰块配合动作。 通过和转轴上的碰块进行触碰 动作触发限位开关和信号开关。
作为优选， 所述的从端盖穿出的转轴的端部设有指示盘。 通过指示盘可以 清楚该发明阀位开关状态。
作为优选， 所述的阀体一侧设有与阀芯的凸球面配合的密封体。 通过密封 体与阀芯凸球面的配合可以提高阀芯与进风口或者与出风口的密封性。
附图说明 图 1为本发明的主视结构示意图。
图 2为本发明的左视结构示意图。
图 3为本发明的电气原理图。
图中所示： 1、 阀体， 2、 电机， 3、 保护罩， 4、 进风口， 5、 出风口， 6、 阀 芯， 7、 主轴， 8、 线路板， 9、 继电器， 10、 限位开关， 11、 信号开关， 12、 指 示盘， 13、 密封圈， 14、 法兰。
具体实施方式 下面结合附图和具体实施方式对本发明作进一步说明：
如图 2所示， 一种电动球阀， 包括阀体 1、 电机 2、 保护罩 3和线路板 8， 阀体 1一侧具有进风口 4， 阀体 1另一侧具有出风口 5; 阀体 1 内设有阀芯 6 和主轴 7， 主轴 7的一端部位于阀体 1底部的支承座的支承孔中， 主轴 7可相 对于该支撑座旋转， 阀芯 6位于阀体 1的进风口 4或者出风口 5的一侧， 阀芯 6与主轴 7连接； 保护罩 3与阀体 1上端部连接， 保护罩 1内设有电机 2和线 路板， 其关键之处在于阀芯 6为球面体， 所述球面体由一个凸球面和一个与主 轴 7连接的端面形成； 所述主轴 7延伸出阀体 1外与电机 2的转轴连接， 所述 的转轴从电机 2另一端的端盖穿出； 所述线路板 8设在电机 2的端盖上； 从端 盖穿出的转轴上设有碰块。 所述的与主轴 7连接的不锈钢球面体的端面为一平 面， 并在平面上设有一连接杆， 连接杆一端固定在阀芯 6的平面上， 这种固定 可以通过铸造阀芯 6时一体成型完成， 也可以是连接杆一端与阀芯 6的平面焊 接而成或者连接杆与阀芯 6之间螺紋连接固定， 本实施例是通过连接杆与阀芯 6平面之间螺紋连接后再焊接的固定。 连接杆与主轴 7连接是通过连接杆另一 端与主轴的螺紋连接完成的， 之所以采用螺紋连接， 是为了在阀芯出现故障的 情况下方便更换阀芯。 为了增加进风口 4或者出风口 5密封时的密封性， 在阀 体 1一侧设有一个与阀芯 6的凸球面配合的密封体，该密封体由密封圈 13和一 个钢套组成。 由于阀芯 6由现有的不锈钢球改进为不锈钢球面体， 减轻了阀芯 的重量， 且只使用一个密封圈 13， 减小了阀芯与密封圈的摩擦系数。 通过减轻 阀芯重量和减少密封圈的使用个数， 使电机 2的负荷减小， 电机 2可以不经传 动装置来放大力矩而直接通过主轴 7带动阀芯 6转动。 需要指出的一点是， 密 封圈 13与阀芯 6设置在阀体 1内的同一侧， 阀芯 6既可以设在进风口 4一侧， 也可以设在出风口 5—侧， 本实施例中阀芯 6设在出风口 5—侧， 且阀芯 6的 凸球面部分对着出风口 5，因此，密封圈 13也同样设在阀体 1的出风口 5—侧， 具体的做法是在出风口 5的管道口固定一个位置可以径向调节的钢套， 密封圈 13就放置在钢套中， 当阀芯 6转动 90度关闭出风口 5时， 密封圈 13与阀芯 6 的凸球面接触再通过钢套径向位置调节配合松紧来达到需要的密封性能。
本实施例中的电机 2为微型特种同步电机， 该电机 2为双出轴的电机， 即 电机 2的转轴分别从电机 2的两端穿出， 转轴的一端与主轴 7连接， 用于传动 主轴 7; 另一端穿出电机 2的端盖， 在穿出端盖的转轴上套设有碰块， 用来触 碰线路板 8上的电气开关。 如图 1所示， 该电机 2位于阀体 1的外面并与阀体 1的上端部固定， 通过传动主轴 7使阀芯 6转动， 该电机 2每分钟转动 60转。 由于阀芯 6是电机 2通过主轴 7带动旋转的，阀芯 6顺时针转动 90度就会打开 出风口 5， 阀芯 6逆时针转动 90度就会关闭出风口 5， 也就是说经过四分之一 秒， 即 0.25秒钟， 阀位就处于全开或者全闭位置， 现有技术中开关速度基本在 2秒左右， 也就是说目前的电动球阀开启和关闭通常都在 2秒每次， 而本发明 的开关速度可以达到 0.25秒每次。 需要说明的是， 本发明的阀体 1为长方体或 正方体或法兰相互连接的圆柱体结构， 本实施例中阀体 1为法兰相互连接的圆 柱体结构， 其中的主轴 7通过连接杆带动阀芯 6绕着主轴 7转动。 所述的线路 板 8上设有继电器 9、 限位开关 10、 信号开关 11 ; 线路板 8固定在电机 2的端 盖上，线路板 8上的限位开关 10和信号开关 11与设在转轴上的碰块配合动作。 继电器 9包括一对继电器常闭触点 K1 , 一对继电器常开触点 K2; 限位开关 10 有两个， 包括阀门关闭到位限位开关 S1 , 阀门开启到位限位开关 S2 ; 信号开关 11为阀门开启信号输出开关 S3。两个限位开关 10和信号开关 11都通过套在转 轴上的机械碰块碰触动作， 由于在转轴上设置碰块来触发电气开关属于常规技 术， 所以具体如何动作不再赘述， 图中也未作显示。 为了直观地了解本发明工 作时的阀位开关情况， 从端盖穿出的转轴的端部设有阀位开与关标记的指示盘 12和指针， 指示盘 12上部的指针固定在转轴顶端随转轴一起转动， 当转轴顺 时针或者逆时针转过 90度， 阀位处于开启或者关闭状态时， 指示盘 12上部的 指针和盘上的标记配合显示阀位的开启或者关闭。 另外， 本发明的阀体 1由现 有技术的铸铁制造改进为由钢管与法兰焊接后再通过螺栓连接而成。 为了方便 本发明与外接管道的连接， 进风口 4和出风口 5连接处都连接有法兰 14， 通过 法兰 14与外接管道连接。
本发明的工作原理如下： 在无外来开启信号的情况下， 在工作电源的作用 下， 保持全闭电锁定， 即出风口 5关闭， 此时指示盘 12处于全闭指示位置， 电 指示开关信号 （继电信号） 无输出。 当加入开启信号后， 继电器 9动作， 电机 2立即旋转， 其转轴带动主轴 7及不锈钢阀芯 6同步旋转， 经过 0.25秒钟， 阀 位处于全开位置，即出风口 5打开。在限位开关 10的作用下，电机 2停止旋转， 并且保持锁定， 同时电信号开关 11被碰触动作，开关信号输出使电动球阀的控 制室内的指示灯作出相应指示， 此时指示盘 12指针指示全开位置。反之， 当开 启电信号消失后， 电机 2立即反转， 经过 0.25秒钟， 在反向限位开关作用下， 电机 2停止， 此时阀位全闭， 且保持全闭锁定。 具体电气原理如下： 如图 3所 示， 当加入开启信号后， 继电器 9动作,继电器常闭触点 K1打开， 继电器常开 触点 K2闭合， 此时阀门开启到位限位开关 S2常闭， 工作电源从继电器常开触 点 K2、阀门开启到位限位开关 S2通过， 2-3绕组为正绕组， 1-3绕组为副绕组， 此时当电机 2正向带动阀芯 6转动 90度至阀门完全打开， 即出风口完全敞开， 触碰阀门开启到位限位开关 S2、 阀门开启信号输出开关 S3 , 使阀门开启到位 限位开关 S2 由常闭变为打开， 电机 2失电停止运转， 此时阀门开启信号输出 开关 S3给出闭合信号； 反之， 当开启信号消失后， 继电器常开触点 K2由闭合 变为打开， 继电器常闭触点 K1 由打开归位闭合， 此时阀门关闭到位限位开关 S1为常闭， 1-3绕组为正绕组， 2-3绕组为副绕组， 电机得电反向转动， 当反向 带动阀芯 6转动 90度至阀门完全关闭时， 即出风口被完全封闭，触碰阀门关闭 到位限位开关 S1 , 使阀门关闭到位限位开关 S1由常闭变为打开， 电机 2失电， 停止运转。

Claims

权利要求
1、 一种电动球阀， 包括阀体、 电机、 保护罩和线路板， 阀体一侧具有进风 口， 阀体另一侧具有出风口； 阀体内设有阀芯和主轴， 阀芯与主轴连接； 保护 罩与阀体上端部连接， 保护罩内设有电机和线路板， 其特征在于： 阀芯为球面 体， 所述球面体由一个凸球面和一个与主轴连接的端面形成； 所述主轴延伸出 阀体外与电机的转轴连接， 所述的转轴从电机另一端的端盖穿出； 所述线路板 设在端盖上； 所述从端盖穿出的转轴上设有碰块。
2、 根据权利要求 1所述的电动球阀， 其特征在于： 所述的与主轴连接的端 面为一平面， 并在平面上设有一连接杆， 所述连接杆与主轴连接。
3、 根据权利要求 1所述的电动球阀， 其特征在于： 所述的线路板上设有继 电器、 限位开关、 信号开关； 所述限位开关和信号开关与设在转轴上的碰块配 合动作。
4、 根据权利要求 1所述的电动球阀， 其特征在于： 所述的从端盖穿出的转 轴的端部设有指示盘。
5、 根据权利要求 1所述的电动球阀， 其特征在于： 所述的阀体一侧设有与 阀芯的凸球面配合的密封体。
6、 根据权利要求 5所述的电动球阀， 其特征在于： 所述的密封体为由聚四 氟乙烯制作而成的密封圈。
PCT/CN2012/076746 2011-12-16 2012-06-12 电动球阀 WO2013086841A1 (zh)

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