CN2286264Y

CN2286264Y - Magnetic coupling internal driving valve

Info

Publication number: CN2286264Y
Application number: CN 96217615
Authority: CN
Inventors: 孙平
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-18
Filing date: 1996-06-18
Publication date: 1998-07-15
Anticipated expiration: 2006-06-18

Abstract

The utility model relates to a magnetic coupling internal driving valve. The utility model adopts the magnetic coupling and the full seal to omit the dynamic seal of valve filling materials to cause the leakage not to be generated. An internal-reinforcement driving mechanism is arranged in a cylinder body, and the utility model adopts transmission mechanisms, such as a screw gear worm, a worm rack, a gear set, etc. to cause force moment for opening and closing the valve to be reduced. The utility model is suitable for various valves which are lifted upwards and downwards, and the utility model is also suitable for the valves which are opened and closed in rotating way. A valve rod is designed into two segments, a plug head is convenient to replace or repair, and multiple external driving modes, such as a manual mode, an electric mode, a hydraulic mode, a magnetic alternating rotary electromagnet mode, etc. are adopted. Except the manual mode, the valve can be controlled remotely by using other modes, and the utility model is favorable for automation.

Description

Magnetically coupled inner driven valve

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

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 valve and make-use scope.

The utility model is to overcome the shortcoming of prior art and reinforcement driving mechanism in a kind of device is provided, and 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 utility model can be realized with the following method, the utility model valve 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 utility model can also further specify as follows: make a general survey of the open and close process of valve, open valve port and be communicated with valve into and out of two kinds of forms of door to rotatablely move with upper and lower poppet stem basically except that minority.Preceding a kind of as stop valve, gate valve, the back is a kind of as stopcock, butterfly valve.The utility model 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, the utility model valve working pressure scope is 0.001 holder～600 barometric pressure.Be as the criterion with direction shown in Figure 1, reinforcement drive link (8) right-hand member is inlaid with inner magnet (9), is equipped with two at least, and inner magnet uses hard magnetic body or soft magnetic bodies manufacturing, and outer magnet (11) is a hard magnetic body, and quantity is identical with inner magnet (9) quantity.Magnetic interacts will prevent magnet short-cut path and magnetic disturbance, adopts scaffold (10) structure between inner magnet (9) and the valve rod for this reason, separates inner magnet (9) and valve rod (2) 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, the utility model available temperature range is-50 ℃～600 ℃.For adapting to multiple drive mechanism, valve gap can be designed to multiple structure, is that sealing cover (3) and valve gap (4) are formed as Fig. 1.Interior reinforcement driving mechanism device can adopt worm gear (15) worm screw (16) driving mechanism as Fig. 1 in hermetically sealed cylinder body (7), the Gear combination drive mechanism, or as worm screw (16) tooth bar (20) 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 (6) is fixedly connected on the bonnet (5), manually-operable, also can drive the rotation of bonnet (5) 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 (21) is set, can with or without bonnet (5), valve gap (4) in or outer surface be tied with coil, energising produces alternating magnetic field, drives inner magnet (9) and rotates.Except that handwheel (6) rotated, other drive unit can be implemented distant control, and this helps industrial automation.

In order to carry out spacing to valve rod (2), in Worm and worm-wheel gearing, be provided with bounding means (12), it is made of retaining ring (13) and pressure part (14), worm gear is upper and lower is furnished with the annulus that rolls or slide or the pressure part (14) of bearing structure, and the top pressure part leans against on the valve gap (4), and the bottom pressure part leans against on the retaining ring (13), the retaining ring is a concentric ring structure, places on the middle recessed round platform of sealing cover (3).Worm gear (15) in the interior reinforcement driving mechanism, worm screw (16), bounding means (12) 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 utility model 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 ℃.

The accompanying drawing drawing is described as follows: Fig. 1 is the utility model magnetic coupling Worm and worm-wheel gearing stopcock structure schematic representation, 1-valve body, 2-valve rod, 3-sealing cover, the 4-valve gap, 5-bonnet, 6-handwheel, the hermetically sealed cylinder body of 7-, 8-reinforcement drive link, 9-inner magnet, the 10-scaffold, 11-outer magnet, 12-bounding means, 13-retaining ring, 14-pressure part, 15-worm gear, the 16-worm screw, 17-embolism head, 18-bolt.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 (15) 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 utility model magnetic coupling stop valve structure schematic representation, and 19-is that the upper end is the valve rod of rack structure, the 20-rack structure.Fig. 5 is that magnetic alternation rotary magnet drives gate valve cross-sectional configuration schematic representation, 21-magnetic alternation rotary magnet.

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) rotation, thereby worm screw (2) is rotated, be fixed together with valve rod (2) with the worm gear (15) of worm meshing, make valve rod lower end embolism head (17) rotation, 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 that embolism head (17) and valve body (1) are close to closed conduct under the valve rod.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 the utility model magnetic coupling worm rack transmission, handwheel (6) rotates and drives worm screw (16) rotation, make the upper and lower motion of valve rod (19) 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 shaft 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 the upper and lower motion of valve rod (19).Because the fluid that discharge pressure is less, so comparatively complicated bounding means structure no longer is set, the spacing of reinforcement drive link is to realize by worm screw (16) top and valve gap (4) end face sliding friction.

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) structure 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) rotation, 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 described in the utility model, 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, material is hard magnetic body or soft magnetic bodies, is equipped with two at least, it is hard magnetic body that bonnet (5) is gone up outer magnet (11) material, and quantity is identical with inner magnet (9) number.

3, magnetically coupled inner driven valve according to claim 1 is characterized in that inner magnet (9) is fixed on the valve rod (2) with 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) or 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 claim 1 or 4, it is characterized in that being used for worm gear (15) worm screw (16) driving mechanism of rotary valve, butterfly valve, account for circle edge less than 180 degree with tooth on the worm gear (15) that worm screw (16) cooperates, 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 (2).

9, as the magnetically coupled inner driven valve as described in claim 1 or 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 claim 1 or 4, the reinforcement driving mechanism is made up of worm gear (15) worm screw (16) in it is characterized in that, should be fixed as one for the worm gear (15) and the valve rod (2) of rotation open and close valve; Should be screw-thread fit for worm gear (15) that promotes the open and close valve and valve rod (2), or worm screw (16) cooperates with the valve rod (19) with tooth bar (20) structure.

11, magnetically coupled inner driven valve according to claim 1, it is characterized in that bounding means (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.