CN2439574Y

CN2439574Y - Magnetic gate valve

Info

Publication number: CN2439574Y
Application number: CN 00241282
Authority: CN
Inventors: 郑全逸
Original assignee: Harbin Engineering University
Current assignee: Harbin Engineering University
Priority date: 2000-07-19
Filing date: 2000-07-19
Publication date: 2001-07-18
Anticipated expiration: 2010-07-19

Abstract

The utility model relates to a magnetic gate valve, which is suitable for industrial and civil pipelines, and is especially suitable for pipelines conveying poisonous and harmful fluids because it has no external leakage. The appearance of the utility model is similar to that of a traditional gate valve, which adopts magnetic drag and two-stage opening and closing technology, and is equipped with an emergency device. Its main components include valve body, bonnet, gasket, gate, screw, hand wheel, outer magnet, inner magnet, outer thrust bearing, inner thrust bearing, moving nut, upper limit block, lower limit block, emergency end Cover, sealing ring, face sealing disc and handwheel shaft.

Description

Magnetic gate valve

一种适用于工业和民用管道中对各种流体进行截断或调节的磁力闸板阀，因其无外漏而特别适用于输送有毒、有害流体的管道中。A magnetic gate valve suitable for shutting off or regulating various fluids in industrial and civil pipelines, especially suitable for pipelines transporting toxic and harmful fluids because of its absence of leakage.

在各种阀门的设计和制造过程中，减少其外漏是优先考虑的问题。目前，由于它们都摆脱不了阀杆这一组件，致使阀杆密封结构层出不穷，工艺结构日趋复杂，对其材质性能的要求也愈来愈高，但密封效果或使用寿命仍不尽人意。In the design and manufacture of various valves, reducing their leakage is a priority. At present, because they cannot get rid of the valve stem, the sealing structure of the valve stem emerges in an endless stream, the process structure is becoming more and more complex, and the requirements for its material performance are also getting higher and higher, but the sealing effect or service life is still not satisfactory.

本实用新型的目的是提供一种磁力闸板阀，它是利用磁力的穿透性使得阀杆无外漏部分，因而无需相应的密封结构，从根本上铲除了阀门中流体外泄的根源。与此同时，为了保证有限的磁拖动力矩能足以启闭阀瓣，采用了两级启闭技术和结构，并加装应急机构，处理因磁拖动引起的故障。The purpose of this utility model is to provide a magnetic gate valve, which makes use of the penetrability of the magnetic force so that the valve stem has no leakage, so no corresponding sealing structure is needed, and the source of the fluid leakage in the valve is fundamentally eliminated. At the same time, in order to ensure that the limited magnetic drag torque can be sufficient to open and close the valve disc, a two-stage opening and closing technology and structure are adopted, and an emergency mechanism is installed to deal with failures caused by magnetic drag.

本实用新型的主要构成包括阀体[1]、阀盖[2]、垫片[3]、闸板[4]、螺杆[5]、手轮[6]、外磁钢[7]、内磁钢[8]、外推力轴承[9]、内推力轴承[10]、动螺母[11]、上限位块[12]、下限位块[13]、应急端盖[14]、密封圈[15]、端面密封盘[16]和手轮轴[17]。在阀体[1]与阀盖[2]的法兰盘间加垫片[3]后用螺栓连接。两者之间形成的空间需能容纳开启后的闸板[4]。阀盖[2]内腔上侧为平顶封闭式圆筒状，外侧固装一手轮轴[17]。流体进出口同轴线地位于阀体[1]两侧，一般分别通过法兰盘和螺栓与管道连接；当阀体[1]公称尺寸较小时，亦可采用管螺纹或其它连接方式。在阀体[1]的进出口轴线的中垂面两侧对称地加工出与闸板[4]侧面相吻合的密封面，或按传统方法装嵌各种密封座圈。垂直于进出口轴线放置的圆盘形闸板[4]是由左右两片组成，并借助可让螺杆[5]穿过的上限位块[12]和下限位块[13]用用螺钉连成一体，并在内部形成一个空间，称之为双体平行式闸板或双体楔式闸板。与传统的闸板不同之处在于闸板[4]中心处加工出同轴线透孔，作为流体辅助通道；置于上述空间内的动螺母[11]的两平行侧面可封堵住该通道，以阻断流体。螺杆[5]上端的托盘上侧固装一组内磁钢[8]，并借助内推力轴承抵在阀盖[2]内腔上端平面上，下端穿过上限位块[12]通孔、动螺母[11]、下限位块[13]通孔和阀体[1]下侧面上的透孔后，固装一个端面密封盘[16]。螺杆[5]与阀体[1]上透孔之间加装密封圈[15]，螺杆[5]下端为四方头。应急端盖[14]用螺钉固定在该处阀体[1]外侧。手轮[6]靠阀盖[2]侧加工成圆筒状供安装一组外磁钢[7]用。轮心处的轴向通孔可套装在阀盖[2]上端外侧的手轮轴[17]上并用螺帽或卡簧限位。如欲开启阀门可转动手轮[6]，其上固定的一组外磁钢[7]拖动阀盖[2]内同侧的一组内磁钢[8]使螺杆[5]同向旋转，迫使处于下限位置(抵在下限位块[13]上)封堵闸板[4]中心流体辅助通道的动螺母[11]上移。当该通道全开时，动螺母[11]上沿恰好抵在上限位块[12]上，如果沿该方向继续转动手轮[6]，动螺母[11]将带动闸板[4]上移直至全部打开流体主通道。设计出主、辅两通道的目的就是为了减少闸板[4]的开启力矩。当手轮[6]反向旋转时，动螺母[11]离开上限位块[12]下移，直至全部封堵辅助通道，此时动螺母[11]下沿恰好抵在下限位块[13]上，如果沿该方向继续转动手轮[6]，动螺母[11]将带动闸板[4]下移直至全部关闭流体主通道。如有意外情况，磁力无法拖动阀门启闭，可打开应急端盖[14]，用特制扳手代替手轮[6]转动螺杆[5]。此端密封简单，会有外漏，这在应急处理故障时是允许的。故障排除后再用应急端盖[14]密封。The main components of the utility model include a valve body [1], a valve cover [2], a gasket [3], a gate [4], a screw [5], a handwheel [6], an outer magnetic steel [7], an inner Magnetic steel [8], outer thrust bearing [9], inner thrust bearing [10], moving nut [11], upper limit block [12], lower limit block [13], emergency end cover [14], sealing ring [ 15], end face sealing disc [16] and hand wheel shaft [17]. Add a gasket [3] between the valve body [1] and the flange of the valve cover [2] and connect them with bolts. The space formed between the two needs to be able to accommodate the opened gate [4]. The upper side of the valve cover [2] inner cavity is a flat-top closed cylinder, and a handwheel shaft [17] is fixedly installed in the outside. The fluid inlet and outlet are coaxially located on both sides of the valve body [1], and are generally connected to the pipeline through flanges and bolts respectively; when the nominal size of the valve body [1] is small, pipe threads or other connection methods can also be used. On both sides of the vertical surface of the inlet and outlet axis of the valve body [1], the sealing surface matching the side of the gate [4] is symmetrically processed, or various sealing seat rings are assembled according to the traditional method. The disc-shaped gate [4] placed perpendicular to the axis of the inlet and outlet is composed of two left and right pieces, and is connected with screws by means of the upper limit block [12] and the lower limit block [13] that allow the screw [5] to pass through. Integrate and form a space inside, which is called a double-body parallel gate or a double-body wedge gate. The difference from the traditional ram is that the center of the ram [4] is processed with a coaxial through hole as a fluid auxiliary channel; the two parallel sides of the movable nut [11] placed in the above space can block the channel , to block fluid. A set of internal magnetic steel [8] is fixed on the upper side of the tray at the upper end of the screw [5], and is pressed against the upper plane of the inner cavity of the valve cover [2] by means of an internal thrust bearing, and the lower end passes through the through hole of the upper limit block [12]. After moving nut [11], lower limit block [13] through hole and valve body [1] the through hole on the lower side, install an end face sealing disc [16]. A sealing ring [15] is installed between the screw rod [5] and the through hole on the valve body [1], and the screw rod [5] lower end is a square head. Emergency end cover [14] is fixed on the outside of this place valve body [1] with screw. Handwheel [6] is processed into cylindrical shape by bonnet [2] side for installing one group of outer magnetic steel [7]. The axial through hole at the center of the wheel can be sleeved on the hand wheel shaft [17] on the outer side of the upper end of the valve cover [2] and limit the position with a nut or jump ring. If you want to open the valve, you can turn the handwheel [6], and a set of outer magnetic steel [7] fixed on it drags a set of inner magnetic steel [8] on the same side of the valve cover [2] to make the screw [5] go in the same direction. Rotate, force the moving nut [11] that is in the lower limit position (against the lower limit block [13]) to block the fluid auxiliary passage in the center of the flash plate [4] and move up. When the channel is fully opened, the upper edge of the moving nut [11] just touches the upper limit block [12]. If the handwheel [6] continues to be turned in this direction, the moving nut [11] will drive the gate [4] up Move until the main fluid channel is fully open. The purpose of designing the main and auxiliary two passages is exactly in order to reduce the opening moment of the flashboard [4]. When the hand wheel [6] rotates in the opposite direction, the moving nut [11] leaves the upper limit block [12] and moves down until all the auxiliary channels are blocked. At this time, the lower edge of the moving nut [11] just touches the lower limit block [13] ], if you continue to turn the hand wheel [6] in this direction, the moving nut [11] will drive the gate [4] to move down until the main fluid channel is completely closed. If there is an accident, the magnetic force cannot drag the valve to open and close, you can open the emergency end cover [14], and use a special wrench instead of the handwheel [6] to turn the screw rod [5]. The seal at this end is simple, and there will be external leakage, which is allowed in emergency treatment of failures. Use the emergency end cover [14] to seal after troubleshooting.

图1磁力闸板阀结构示意图Figure 1 Schematic diagram of the structure of the magnetic gate valve

下面是本实用新型的最佳实施例：Below is the preferred embodiment of the present utility model:

本实用新型的主要构成包括阀体[1]、阀盖[2]、垫片[3]、闸板[4]、螺杆[5]、手轮[6]、外磁钢[7]、内磁钢[8]、外推力轴承[9]、内推力轴承[10]、动螺母[11]、上限位块[12]、下限位块[13]、应急端盖[14]、密封圈[15]、端面密封盘[16]和手轮轴[17]。在阀体[1]与阀盖[2]的法兰盘间加垫片[3]后用螺栓连接。顶部呈封闭筒状的阀盖[2]外侧固定有手轮轴[17]。阀体[1]的流体进出口为直通式，用法兰盘和螺栓与外管道连接。在阀体[1]的进出口轴线的中垂面两侧对称地加工出与闸板[4]侧面相吻合的密封面(或按传统方法装嵌密封座圈——图中未示出)。沿该中垂面放置的圆盘形闸板[4]是由左右两片组成，借助上限位块[12]和下限位块[13]用螺钉连成一体，并形成一个可供动螺母[11]上下移动的空间。两片的中心加工出口径适当的流体辅助通道。螺杆[5]顶端的圆形托盘上固装一组内磁钢[8]并借助内推力轴承[10]抵在阀盖[2]内腔上部平面上，下端穿过上限位块[12]的通孔、动螺母[11]、下限位块[13]的通孔和阀体[1]下侧面上的通孔后固装一个端面密封盘[16]。螺杆[5]与此处阀体[1]间加装密封圈[15]。应急端盖[14]用螺钉固定在该处阀体[1]外侧。The main components of the utility model include a valve body [1], a valve cover [2], a gasket [3], a gate [4], a screw [5], a handwheel [6], an outer magnetic steel [7], an inner Magnetic steel [8], outer thrust bearing [9], inner thrust bearing [10], moving nut [11], upper limit block [12], lower limit block [13], emergency end cover [14], sealing ring [ 15], end face sealing disc [16] and hand wheel shaft [17]. Add a gasket [3] between the valve body [1] and the flange of the valve cover [2] and connect them with bolts. The top is fixed with handwheel shaft [17] outside the bonnet [2] of closed cylinder. The fluid inlet and outlet of valve body [1] is straight-through type, is connected with outer pipeline with flange plate and bolt. On both sides of the vertical surface of the inlet and outlet axis of the valve body [1], symmetrically process the sealing surface that matches the side of the gate [4] (or install the sealing seat ring according to the traditional method - not shown in the figure) . The disc-shaped ram [4] placed along the vertical plane is made up of two left and right pieces, connected together with screws by means of the upper limit block [12] and the lower limit block [13], and forms a movable nut [ 11] Space to move up and down. The two pieces are centrally machined with fluid auxiliary channels of appropriate diameter. A group of internal magnetic steel [8] is fixed on the circular tray at the top of the screw [5] and is pressed against the upper plane of the inner cavity of the valve cover [2] by means of the internal thrust bearing [10], and the lower end passes through the upper limit block [12] After the through hole of the through hole, moving nut [11], the through hole of the lower limit block [13] and the through hole on the valve body [1] lower side, an end face sealing disc [16] is fixedly installed. Install sealing ring [15] between screw rod [5] and valve body [1] here. Emergency end cover [14] is fixed on the outside of this place valve body [1] with screw.

本实用新型因无外露阀杆而做到无外漏，因省掉了阀杆密封件而使结构简单，因采用两级开启技术而降低启闭力矩，同时因有应急机构而使使用时更加可靠。The utility model achieves no leakage due to no exposed valve stem, simple structure because of the omission of the valve stem seal, and reduces the opening and closing moment due to the adoption of two-stage opening technology, and at the same time, it is easier to use due to the emergency mechanism. reliable.

Claims

1. a magnetic gate valve is characterized in that it comprises valve body [1], valve gap [2], pad [3], flashboard [4], screw rod [5], handwheel [6], outer steel [7], interior magnet steel [8], extrapolability bearing [9], interior thrust-bearing [10], moving nut [11], upper limit position block [12], lower position block [13], emergent end cap [14], seal ring [15], end face seal dish [16] and hand wheel shaft [17]; The handwheel [6] that wherein is fixed with one group of outer steel [7] is sleeved on the hand wheel shaft [17] of valve gap [2] top outer, flashboard [4] is by about linking into an integrated entity with screw two, upper limit position block [12] and lower position block [13] are formed, be positioned at its inner space moving nut [11] but the fluid accessory channel of shutoff flashboard [4] center, magnet steel [8] in fixing one group on the round tray at screw rod [5] top, the other end passes upper limit position block [12], moving nut [11], install an end face seal dish [16] behind lower position block [13] and valve body [1] the downside open-work, and encapsulate with emergent end cap [14].

2. a kind of magnetic gate valve as claimed in claim 1, it is characterized in that flashboard when hydrodynamic pressure is less in the pipeline [4] changes system into the parallel type or the wedge-type Single disc of radial direction through hole (screw rod [5] can pass), promptly save upper limit position block [12], lower position block [13] and fluid passage, center, moving nut [11] is fixed on the radial direction through hole top of flashboard [4], and other structure is constant.