CN2439574Y - Magnetic gate valve - Google Patents

Abstract

The utility model relates to a magnetic gate valve which is suitable for being used in industry and civil pipelines. Because the has no outleakage, the magnetic gate valve is especially suitable for pipelines for conveying toxic and harmful fluids. The appearance of the utility model is similar to a traditional gate valve. The utility model adopts a magnetic dragging technique and a two-stage starting and stopping technique and is additionally provided with an emergency device. The magnetic gate valve mainly comprises a valve body, a valve cap, a shim, a gate, a screw, a hand wheel, an external magnetic steel, an internal magnetic steel, and external thrust bearing, and internal thrust bearing, a movable screw, an upper limiting stopper, a lower limiting stopper, an emergency end cap, a sealing ring, an end face sealing disk and a hand wheel shaft.

Description

Magnetic gate valve

A kind of magnetic gate valve that in industry and the civil pipeline various fluids is blocked or regulate that is applicable to is specially adapted to carry in the pipeline of poisonous, harmful fluid because of its nothing leaks outside.

In the design and manufacture process of various valves, reducing that it leaks outside is top-priority problem.At present, because they all do not break away from this assembly of valve rod, cause valve rod leak-proof structure to emerge in an endless stream, process structure is increasingly sophisticated, and is also more and more high to the requirement of its material capability, but sealing effect or working life are still unsatisfactory.

The purpose of this utility model provides a kind of magnetic gate valve, and it is to utilize the penetrability of magnetic force to make valve rod not have the part of leaking outside, thereby need not corresponding sealing configuration, has fundamentally rooted out the root that fluid leaks in the valve.Meanwhile, can be enough to open and close flap in order to guarantee limited magnetic drawing torque, adopt two-stage start and stop technology and structure, and installed emergency mechanism additional, processing drags the fault that causes because of magnetic.

Main composition of the present utility model 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].Shimming [3] back is connected with bolt between the flange plate of valve body [1] and valve gap [2].The space need that form between the two can hold the flashboard [4] after the unlatching.Valve gap [2] inner chamber upside is that flat-top is closed cylindric, and the outside installs a hand wheel shaft [17].Fluid inlet and outlet coaxial line ground is positioned at valve body [1] both sides, generally is connected with pipeline with bolt by flange plate respectively; When valve body [1] nominal size hour, also can adopt pipe thread or other Placement.The middle vertical plane bilateral symmetry of the import and export axis of valve body [1] process the sealing surface that matches with flashboard [4] side, or by the various seal holder rings of conventional method assembly.Perpendicular to import and export disc flashboard [4] that axis places by about two form, and fuse with screw by upper limit position block [12] that can allow screw rod [5] pass and lower position block [13], and, be referred to as binary parallel type flashboard or binary wedge-type flashboard in space of formation, inside.Be that with traditional flashboard difference flashboard [4] center processes the coaxial line open-work, as the fluid accessory channel; Place two parallel side of the moving nut [11] in the above-mentioned space can block this passage, with block fluid.Magnet steel [8] in the pallet upside of screw rod [5] upper end installs one group, and be against on valve gap [2] inner chamber on the Transverse plane by interior thrust-bearing, the lower end installs an end face seal dish [16] after passing open-work on upper limit position block [12] through hole, moving nut [11], lower position block [13] through hole and valve body [1] downside.Screw rod [5] and valve body [1] are gone up between the open-work and are installed seal ring [15] additional, and screw rod [5] lower end is a square head.Emergent end cap [14] is screwed in this place's valve body [1] outside.Handwheel [6] is processed into cylindric for one group of outer steel [7] usefulness is installed by valve gap [2] side.The hand wheel shaft [17] that the axial hole at core wheel place can be sleeved on outside valve gap [2] upper end is last and spacing with nut or jump ring.As desire the rotatable handwheel [6] of Open valve, one group of interior magnet steel [8] that one group of outer steel [7] of fixing on it drags the interior homonymy of valve gap [2] rotates screw rod [5] in the same way, forces on the moving nut [11] that is in lower position (being against on the lower position block [13]) shutoff flashboard [4] core flow accessory channel and moves.When this passage standard-sized sheet, moving nut [11] upper edge is against on the upper limit position block [12] just, if be rotated further handwheel [6] in the direction, moving nut [11] will drive on the flashboard [4] and move until all opening the fluid main passage.The purpose of designing main and auxiliary two passages is exactly in order to reduce the unlatching moment of flashboard [4].When handwheel [6] counterrotating, moving nut [11] leaves upper limit position block [12] and moves down, until whole shutoff accessory channels, this moment, moving nut [11] lower edge was against on the lower position block [13] just, if be rotated further handwheel [6] in the direction, moving nut [11] will drive flashboard [4] and move down until Close All fluid main passage.If any fortuitous event, magnetic force can't drag valve opening and closing, can open emergent end cap [14], replaces handwheel [6] rotating screw bolt [5] with special spanner.This end sealing is simple, has to leak outside, and this allows when the emergency processing fault.After getting rid of, fault seals with emergent end cap [14] again.

Fig. 1 magnetic gate valve structural representation

Be most preferred embodiment of the present utility model below:

Main composition of the present utility model 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].Shimming [3] back is connected with bolt between the flange plate of valve body [1] and valve gap [2].The top is valve gap [2] outside of sealing tubular and is fixed with hand wheel shaft [17].The fluid inlet and outlet of valve body [1] is a straight-through type, is connected with Outer Tube with bolt with flange plate.The middle vertical plane bilateral symmetry of the import and export axis of valve body [1] process the sealing surface that matches with flashboard [4] side (or by conventional method assembly seal holder ring---not shown).The disc flashboard of placing along this middle vertical plane [4] by about two form, fuse with screw by upper limit position block [12] and lower position block [13], and form one can be for moving the space that nut [11] moves up and down.Two center processes the suitable fluid accessory channel of bore.Install in one group magnet steel [8] on the round tray on screw rod [5] top and be against on valve gap [2] the inner chamber upper plane by interior thrust-bearing [10], the lower end installs an end face seal dish [16] after passing the through hole of the through hole of upper limit position block [12], moving nut [11], lower position block [13] and the through hole on valve body [1] downside.Screw rod [5] and install seal ring [15] herein between valve body [1] additional.Emergent end cap [14] is screwed in this place's valve body [1] outside.

The utility model is accomplished not have and leaked outside because of nothing exposes valve rod, makes simple in structurely because of having saved valve rod sealing member, reduces keying moment because of adopting the two-stage opening technology, and is more reliable when having emergency mechanism to make use simultaneously.

Claims (2)

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.