CN1082164C

CN1082164C - Magnetically coupled inner driven valve

Info

Publication number: CN1082164C
Application number: CN96102388A
Authority: CN
Inventors: 孙平
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-18
Filing date: 1996-06-18
Publication date: 2002-04-03
Anticipated expiration: 2016-06-18
Also published as: CN1176358A

Abstract

The present invention relates to a magnetic coupling inside-driven valve which adopts magnetic coupling and full seal and omits the dynamic seal of the stuffing of the valve without leakage. An inner reinforcement drive mechanism is arranged in a fully-sealed cylinder body, and transmission mechanisms, such as a worm wheel and a worm, a worm and a rack bar, a gear set, etc., are adopted. The present invention is suitable for the design of various types of valves opened or closed by lifting, falling and rotation, the force moment for opening and closing the valve is reduced, and the application range is broad. A valve rod of the valve is designed into two segments, and the replacement or the maintenance of the plug head is convenient; a valve cap for arranging an external magnet can adopt various kinds of external drive, such as manual drive, electric drive, pneumatic drive, hydraulic drive, etc., and the external drive can be carried out by a magnetic alternate rotary electromagnet structure. The valve can be operated by remote control except for the manual drive, so the present invention is favorable for automatization.

Description

Magnetically coupled inner driven valve

Invention field:

The present invention relates to a kind of valve that utilizes magnetic coupling driving mechanism open and close.

Background technique:

As everyone knows, valve is one of indispensable equipment of line transportation in industrial production.Wherein most popular is stop valve, stopcock, ball valve, gate valve, butterfly valve etc.In valve uses, because most of valve and valve body seal with filler, so behind the use certain hour, will leak, particularly big at pressure reduction, temperature is high or conditional request when harsh, problem is just very serious, and valve open and close effort, the major issue big at discharge pressure, that degree of vacuum is high, the leakage of valve must solve especially when the poisonous fluid of burn into was arranged.Multiple technical solution was arranged for this reason.Wherein Chinese patent " 96201382.x " inventor proposes to utilize magnetic coupling to solve the hermetically sealed technology that stop valve leaks, its valve body, valve gap are totally-enclosed, eliminated motive sealing, promptly eliminate the packing seal of valve rod and valve body, magnetic patch or magnetic sheet in adopt on valve rod top, corresponding interior magnetic patch or outer magnetic patch of magnetic patch place device or magnetic sheet utilize magnetic attachment principle rotary valve rod and then open and close valve on the outer bonnet of valve gap.This technology has solved the valve leak problem really, yet its technological scheme only limits to be used in lift-bolt and opens, valve that closes such as stop valve, gate valve etc., to opening by rotation, valve that closes such as stopcock etc. do not provide feasible program, and in its scheme, the through hole that the valve rod head diameter is little should be opened earlier, utilization has the I shape flap differential pressure action of the bellows of approximate sealing, the last big valve passage of bore of thoroughly opening, so structure is comparatively complicated, and each gap, cavity joint is little in the valve body, be difficult for counterpressure, still have big resistance during Open valve.In addition, interior magnetic patch or magnetic sheet non-refractory, thereby limited the valve using scope.

Summary of the invention:

The objective of the invention is to overcome the shortcoming of prior art and reinforcement driving mechanism in a kind of device is provided, it is little to open moment, and maintenance is convenient, and is simple in structure, can distant control and also the hermetically sealed magnetic coupling of suitable polytype valve in the valve of driving mechanism.

The present invention can realize with the following method, valve of the present invention is made up of valve body, valve gap, bonnet, valve rod, handwheel, form totally-enclosed cylinder body between valve body, sealing cover and the valve gap, in establish in the reinforcement driving mechanism, be inlaid with inner magnet at reinforcement drive link right-hand member, the inner magnet place is provided with outer magnet relatively on bonnet, and the reinforcement drive link is connected with valve rod with driving mechanism, valve rod top is provided with bounding means, is connected with outer drive unit on the bonnet.

The present invention can also further specify as follows: make a general survey of the open and close process of valve, be communicated with two kinds of forms of valve inlet/outlet basically with upper and lower poppet stem unlatching valve port with to rotatablely move except that minority.Preceding a kind of as stop valve, gate valve, the back is a kind of as stopcock, butterfly valve.The present invention is the valve of these two kinds of forms of motion and designs.Because between valve body, sealing cover and the valve gap of this valve is hermetically sealed cylinder body, there is not motive sealing to exist, fundamentally solved the leakage problem of valve, also enlarged the working pressure of valve, valve working pressure scope of the present invention is 0.001 holder～600 barometric pressure.Be as the criterion with direction shown in Figure 1, reinforcement drive link right-hand member is inlaid with inner magnet, is equipped with two at least, and inner magnet uses hard magnetic body or soft magnetic bodies manufacturing, and outer magnet is a hard magnetic body, and quantity is identical with inner magnet quantity.Magnetic interacts will prevent magnet short-cut path and magnetic disturbance, adopts the scaffold structure between inner magnet and the valve rod for this reason, separates inner magnet and valve rod fully, and scaffold is made with non-magnetic flux material.When valve is carried high temperature fluid, magnetic material will lose its magnetic texure characteristic, for this reason, when being used for high temperature fluid, select the soft magnetic bodies manufacturing for use, thereby the high temperature of having expanded valve uses limitation.After measured, available temperature range of the present invention is-50 ℃～600 ℃.For adapting to multiple drive mechanism, valve gap can be designed to multiple structure, is that sealing cover and valve gap are formed as Fig. 1.Interior reinforcement driving mechanism device can adopt the Worm and worm-wheel gearing as Fig. 1 in hermetically sealed cylinder body, the Gear combination drive mechanism, or as the worm rack drive mechanism of Fig. 3.

Interior reinforcement driving mechanism mainly is the moment that recently increases lifting or rotary valve rod with the engagement of reliable gear, tooth bar, magnetic coupling is achieved, gear engagement compares the ratio that increases to moment, according to the gear engagement ratio of reinforcement driving mechanism in the pressure reduction design of frictional force, fluid.Be engagement large percentage, a kind of energizing driver structure in labour-saving as Fig. 1, reinforcement driving mechanism type then is used for the less occasion of valve opening moment in Fig. 3, if use Gear combination or gear case structure, can increase unlatching moment again, to adapt to the demand moment of open and close valve.In addition, owing to use all-sealed structure, inside needn't seal by force with filler, has objectively also reduced the required moment of Open valve.

For outer drive unit with magnetic coupling rotation drive link, available handwheel is fixedly connected on the bonnet, manually-operable, also can drive the rotation of bonnet with various ways such as electronic, pneumatic or hydraulic transmissions, electric drive can adopt gear to be connected with bonnet, also can adopt belt, friction wheel form or drive bonnet with the driven by motor speed reducer with belt or gear and rotate.Other has a kind of drive form for magnetic alternation rotary magnet is set, can with or without bonnet, in valve gap or outer surface be tied with coil, energising produces alternating magnetic field, drives the inner magnet rotation.Except that handwheel rotated, other drive unit can be implemented distant control, and this helps industrial automation.

In order to carry out spacing to valve rod, in Worm and worm-wheel gearing, be provided with bounding means, it is made of retaining ring and pressure part, worm gear is upper and lower is furnished with the annulus that rolls or slide or the pressure part of bearing structure, and the top pressure part leans against on the valve gap, and the bottom pressure part leans against on the retaining ring, the retaining ring is a concentric ring structure, places on the middle recessed round platform of sealing cover.Worm gear in the interior reinforcement driving mechanism, worm screw, bounding means use steel or make with Cuprum alloy, when valve conveyance fluid temperature is low, also can select the plastic materials manufacturing for use, plastic materials can be selected tetrafluoroethylene, polyoxymethylene, polyamide, polyethylene or polyester material for use, select plastics variety for use according to fluid temperature (F.T.), the serviceability temperature scope is-180 ℃～250 ℃.

The present invention has following advantage compared to existing technology: owing to adopted hermetically sealed magnetic coupling driving structure, can make valve accomplish not have and leak.Reinforcement driving mechanism is positioned at closed cylinder in it, so the open and close valve is laborsaving, convenience.Adopt different gear engagement forms and with the combination of valve rod, be applicable to the polytype valve of upper and lower lifting and left rotation and right rotation open and close.This structure valve is reliable, and maintenance is convenient, can the distant control valve.Applicable temperature and pressure range are big, pressure: 0.001 holder～600 barometric pressure; Temperature :-250 ℃～600 ℃.

Description of drawings:

Accompanying drawing drawing of the present invention is described as follows:

Fig. 1 is a magnetic coupling Worm and worm-wheel gearing stopcock structure schematic representation of the present invention;

Fig. 2 is the A-A cross-sectional plan view of Fig. 1, ignores the lower body structure;

Fig. 3 is similar to Fig. 2, and the tooth on the worm gear has toothed portion to account for circle edge less than 180 degree, greater than 90 degree, also is the A-A plan view of valve shown in Figure 1;

Fig. 4 is the hermetically sealed worm rack driving mechanism of a magnetic coupling of the present invention stop valve structure schematic representation;

Fig. 5 is that magnetic alternation rotary magnet drives gate valve cross-sectional configuration schematic representation.

Embodiment:

Below in conjunction with description of drawings embodiment, Fig. 1 has the stopcock embodiment of reinforcement driving mechanism in the worm and gear for magnetic coupling is hermetically sealed, Fig. 2 is its A-A sectional top view, valve is in fully open position, turn handwheel 6, because the magnetic attraction of outer magnet 11, inner magnet 9 rotations, thereby worm screw 16 is rotated, be fixed together, make 17 rotations of valve rod lower end embolism head with the worm gear 15 and the valve rod 2 of worm meshing, every turnback is for once opening and closing, valve body 1, sealing cover 3, valve gap 4 is formed hermetically sealed cylinder body 7, by bounding means 12 fixedly on the valve rod 2, upper/lower positions makes under the valve rod embolism head 17 and valve body 1 be close to closed conduct.Valve rod 2 adopts two segment structures, and bottom embolism head 17 is connected with bolt 18 with valve rod, can change the embolism head rapidly when the maintenance valve, and is convenient, economical.That this structure embolism head 17 is designed to is trapezoidal, sphere or butterfly, to be applicable to that stopcock, ball valve, butterfly valve etc. are only by the valve employing of rotation open and close.If worm gear 15 adopts screw-thread fit to be connected with valve rod 2, then be applicable to the type of upper and lower lift-bolt open and close valve, the space that design has certain altitude is given on valve rod top, and along with the worm gear rotation, valve rod promotes, and counterrotating then valve rod descends; That following embolism head 17 is designed to is coniform, plane plate-like or wedge shape, is applicable to that stop valve, gate valve adopt.For the valve that stopcock, butterfly valve etc. with the Rotate 180 degree are the switching cycle, the tooth on its worm gear accounts for circle edge less than 180 degree, greater than 90 degree, can prevent the disadvantage that the valve open and close is excessive effectively, as Fig. 3.

Fig. 4 is a kind of stop valve structure example of magnetic coupling worm rack of the present invention transmission, handwheel 6 rotates and drives worm screw 16 rotations, make valve rod 19 upper and lower motions with rack structure, open and close valve by this, because gear engagement is little than the interior reinforcement driving mechanism with respect to Fig. 1 structure, so this valve is applicable to the fluid that discharge pressure is less.Structure also can be re-established as in valve rod 19 central shafts and be designed to female thread, and change worm screw 16 into the external screw thread screw-rod structure in view of the above, and screw rod is screwed in the valve rod female thread, drives valve rod 19 upper and lower motions.Because the fluid that discharge pressure is less, so comparatively complicated bounding means structure no longer is set, the spacing of interior reinforcement drive link is to realize by worm screw 16 tops and valve gap 4 end face sliding frictions.

Fig. 5 is the interior reinforcement driving mechanism embodiment of another kind of magnetic coupling worm and gear who is used for gate valve, its worm gear 15 and valve rod 2 are by being threaded, outside force replaces above-mentioned bonnet 5 structures and uses magnetic alternation rotary magnet 21, coil is wound in the valve gap 4 or outer surface, pass to alternating voltage in the coil, use the generation alternating magnetic field, drive inner magnet 9 rotations, other principles and operation and above-mentioned same, because the energising power supply can be carried at a distance, therefore this valve operation can distant control, helps industrial automation.

Outer Power Drive Unit of the present invention, must use can clockwise and anticlockwise driving power.

Claims

1, a kind of magnetically coupled inner driven valve, formed by valve body (1), valve gap (4), bonnet (5), valve rod (2), handwheel (6), reinforcement driving mechanism in it is characterized in that being equipped with in valve body and the valve gap, reinforcement drive link (8) right-hand member in the interior reinforcement driving mechanism is inlaid with inner magnet (9), go up relative inner magnet (9) at bonnet (5) and locate to be provided with outer magnet (11), reinforcement drive link (8) is connected with valve rod (2) with driving mechanism, valve rod top is provided with bounding means (12), and bonnet is connected with outer drive unit on (5).

2, magnetically coupled inner driven valve according to claim 1, it is characterized in that the inner magnet (9) that reinforcement drive link (8) is installed, inner magnet uses hard magnetic body or soft magnetic bodies, is equipped with two at least, bonnet (5) is gone up outer magnet (11) should use hard magnetic body, and quantity is identical with inner magnet (9) number.

3, magnetic coupling according to claim 1 drives valve, it is characterized in that inner magnet (9) is fixedly connected on the valve rod (2) by scaffold (10).

4, magnetically coupled inner driven valve according to claim 1, the reinforcement driving mechanism is a kind of of worm gear (15) worm screw (16), worm screw (16) tooth bar (20) or gear train in it is characterized in that.

5, as the magnetically coupled inner driven valve as described in the claim 1,4, its worm gear (15) worm screw (16) transmission is characterised in that the tooth on the worm gear (15) that cooperates with worm screw (16) accounts for circle edge less than 180 degree, greater than 90 degree.

6, magnetically coupled inner driven valve according to claim 1 is characterized in that outer drive unit is manual, electronic, hydraulic transmission or pneumatic a kind of; With bonnet (5) Placement can be handwheel, friction, belt or gear.

7, magnetically coupled inner driven valve according to claim 1 is characterized in that replacing outer magnet (11) to use magnetic alternation rotary magnet (21), and magnetic alternation rotary magnet device coil is located in the valve gap (4) or outer surface.

8, magnetically coupled inner driven valve according to claim 1 is characterized in that valve rod (2) bottom embolism head (17) is connected with bolt (18) with valve-rod body.

9, as the magnetically coupled inner driven valve as described in the claim 1,8, it is characterized in that valve rod (2) bottom embolism head (17) for stop valve, gate valve, is designed to cone shape, plane plate-like or wedge-like; For stopcock, butterfly valve, ball valve, that embolism head (17) can be designed to is trapezoidal, sphere or butterfly.

10, as the magnetically coupled inner driven valve as described in the claim 1,4, interior reinforcement driving mechanism is made up of worm gear (15) worm screw (16), it is characterized in that should being fixed as one with valve rod (2) for the worm gear (15) of rotation open and close valve; Should be screw-thread fit for the worm gear (15) that promotes the open and close valve with valve rod (2) is connected.

11, magnetically coupled inner driven valve according to claim 1, it is characterized in that stopper (12) is made up of retaining ring (13) and the pressure part (14) that rolls or slide, pressure part (14) is made with metal or plastics, and plastics are selected tetrafluoroethylene, polyoxymethylene, polyamide, polyethylene or polyester material for use.