CN2391067Y

CN2391067Y - Electric driving device for valve

Info

Publication number: CN2391067Y
Application number: CN 99210551
Authority: CN
Inventors: 孙平
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-05
Filing date: 1999-05-05
Publication date: 2000-08-09
Anticipated expiration: 2009-05-05

Abstract

The utility model relates to an electric driving device for a valve, which comprises a valve body, a rotor and a stator, wherein, the center of the valve body is provided with a valve rod; one end of the valve rod is provided with a valve core. The upper part of the valve body is fixedly provided with a valve cover which is arranged in an air gap between the rotor and the stator; the valve cover is in sealing connection with the valve body; the rotor is arranged in the stator and is coaxial with the stator; the valve body and the stator are mutually fixed; the rotor is in fixed connection or in screw connection with the valve rod. A stator coil can be connected with a frequency modulation power supply; a decelerator can also be arranged between the rotor and the valve rod. The electric driving device for a valve has the advantages of simple structure, wide deceleration range, convenient regulation and use, and suitability for various types of valves.

Description

The valve electric driver

The utility model relates to a kind of electric driver of valve.

Use in the valve process existing, the driving of valve is generally manually, when requiring valve opening and closing speed fast, manually can not satisfy the demand.Motor is adopted in the technologic material introduction that has, because when being directly installed on motor on the valve, motor speed is too fast, it is too many and can not meet the needs of to rotate the number of turns, have to adjust by retarder, causes cost to improve, and volume increases, the body heaviness.On the other hand, particularly in the valve present position with the hand rotating valve very during inconvenience, can bring great inconvenience or limit the application of valve to work.To utilizing the magnetic coupling structure to prevent the valve problem that leaks, of common occurrence, but the drive unit of valve opening and closing is related to less, adopt handle manually to open and close valve as Chinese patent: CN 2238950Y " magnetic coupling transmission High Pressure Static Seal Valves "; Chinese patent: CN 2054855U " valve " refers to manually-operated gate and electric valve, or the like.But that is mentioned is electronic, but because used motor speed and the required rotational velocity of valve and rotation period number are not complementary, does not reach application target.

The purpose of this utility model is to provide a kind of and is applicable to that various valves are power-actuated, can regulate opening and closing speed and switching cycle, valve electric driver simple in structure, easy to use.

Valve electric driver of the present utility model can reach with the following method, and the valve electric driver includes valve body, rotor and stator.Wherein the electric power line is connected with stator coil.The valve body center is equipped with valve rod, and valve rod one end has spool.Rotor places in the stator, and is coaxial with stator, and stator and valve body interfix, and valve body top is fixed with valve gap, and valve gap places in the air gap between rotor and the stator, and is connected with valve seal, and rotor is fixedlyed connected with valve rod or to be threaded.

Other implementation methods of the utility model are: rotor is rotatably installed on valve gap and the valve body with bearing, and rotor is with the valve rod that is threaded, and the valve rod middle part is provided with boss, and the groove on boss and the valve body is slidingly matched.

Stator coil can be connected with variable frequency power source, utilizes variable frequency power source to reduce rotor revolution number.Can also between rotor and valve rod, retarder be installed, rotor is rotatably installed on valve gap and the valve body with bearing, and rotor coaxial is fixedly connected on the retarder input end, and retarder is by valve gap and valve seal, be fixed on the valve body, the retarder output terminal is fixedlyed connected with valve rod or to be threaded.

The utility model has following advantage compared to existing technology: owing to use retarder or variable frequency power source, reduction range is big, can be as required regulating valve opening and closing speed and switching cycle at any time, and device is simplified.Because use the class electric machine structure, stator and rotor are the soft junction structure, promptly after valve closing or unlatching are finished; load increases to certain the time, and circuit is power-off protection automatically, the left alone without help commentaries on classics of rotor; never damage motor, and be that rigid structure connects, have carelessness just will damage valve slightly with other electric drive modes.Particularly valve is installed in the position that is awkward, and as places such as down-hole, corner, high-altitudes, but uses the remote-controlled operation of this valve driving opening and closing device, and is very effective.The utility model can be applicable to various types of valves such as ball valve, gate valve, butterfly valve, stopcock.

Description of drawings of the present utility model is as follows:

Fig. 1 is the valve electric driver that the utlity model has variable frequency power source, has omitted valve substructure part and power supply unit among the figure;

The A-A view of the last figure of Fig. 2;

Fig. 3 is the embodiment who the utlity model has retarder, has omitted valve substructure part among the figure; Also omitted power supply unit.

Below with regard to description of drawings embodiment of the present utility model, well-known, valve is control and conveyance fluid indispensability device, but in that to meet manual tune speed slow, can not in time open and close valve; Or valve is installed in not easy-operating place; Or be unsuitable in the poisonous atmosphere that the people enters; Maybe need carry out under the automation mechanized operation situation, just need be by electric drive, when directly utilizing motor driving, can produce following problem: motor is turn-taked too fast, and valve opening and closing need not to rotate the too many number of turns, even as stopcock etc., only need to rotate 90 degree to get final product; Moreover motor rotation speed is fast, the valve mechanism incompatibility, and time one length will produce the burn-down of electric motor accident.So the existing valve driving mode that adopts the driven by motor retarder though can address the above problem, is brought problems such as heaviness, volume are big, uneconomical, the rigid linkage structure of motor and valve also is easy to push up bad valve.The utility model makes full use of the operating characteristic head it off of valve, valve in most of the cases, it is low to open and close frequency, the switching station weak point that takes time need stop the long period needn't drive operation sometimes in a certain position.Therefore a kind of method is to adopt frequency modulation motor directly to drive valve, solves and opens and closes the low problem of frequency, and before motor produced overheated danger, valve event finished, can cut off the electricity supply, and had avoided the motor damage.

Specific embodiment as illustrated in fig. 1 and 2, valve gap 6 with valve body 1 sealing is housed on the top of valve, and promptly valve gap 6 covers on rotor 2 in the valve body 1 as cover, and valve gap 6 places in the air gap between stator 3 and the rotor 2, valve gap 6 is tightly connected with valve body 1 and is one, and keeping valve does not have the advantage that leaks.Device has the rotor 2 of class motor in valve gap 6, and rotor 2 available silicon steel discs 5 are made, and rotor 2 is connected with valve body 1 with valve gap 6 with bearing 7.Coaxial with the valve rod 4 that is threaded with rotor 2, valve rod 4 walls are provided with boss 8, and corresponding valve body 1 is provided with groove 9, and boss 8 is slidingly matched mutually with groove 9, and this example is specially adapted to the gate valve class.Outside valve gap 6, device has stator 3 on the valve body 1, is wound with many group coils 11 in the stator 3, organizes coil 11 more and is connected with variable frequency power source, utilize the frequency shift coil to produce rotating magnetic field, thereby regulate the rotating speed of rotor 2, produce valve drive forces, though accompany valve gap 6 at rotor 2 and 3 of stators, relative distance increases, make stator 3 and rotor 2 easier heatings, but for above-mentioned reasons, still can guarantee the normal using effect of valve.When the utility model is used for other valves, adopt the general technology method just can realize, do not give diagram.As be used for the ball valve time-like, and can rotor 2 is fixing with valve rod 4, do not establish boss 8 grooves 9 structures, make valve rod 4 and valve body 1 be rotationally connected, guaranteeing that mobile activity space should be left down in rotor 2 tops under the coaxial condition of stator 3 and rotor 2, valve rod 4 bottoms are connected with ball valve core.As when being applied to stopcock, on valve body 1, should have restriction valve rod 4 can only revolve the structure that turn 90 degrees, and activity space can not be stayed or stay less on rotor 2 tops, and valve rod 4 lower ends connect the stopcock spool.

Fig. 3 is used for another embodiment of gate valve for the valve electric driver, be used for stator 3 is installed on valve body 1,2 devices of stator 3 and rotor valve gap 6, to reduce the spacing between stator 3 and rotor 2 air gaps as far as possible, still install bearing 7 on rotor 2, bearing 7 is rotatably installed between valve gap 6 and the valve body 1.When not using frequency modulation technology, stator 3 coils 11 can be used civil power or power electricity, and this moment, rotor 2 rotating speeds were quite fast, were difficult to directly connect valve rod 4.For this reason, coaxial connection reducer 10 on rotor 2, in order to satisfy the requirement of valve revolution, the design of its stator 3, rotor 2 and retarder 10 will take into full account the electrical arrangement of valve and use process conditions.Between rotor 3 in the above-described embodiments and the valve rod 4 retarder 10 is installed, rotor 3 is fixedly connected on the input end 12 of retarder 10, and retarder 10 is sealed by valve gap 6 and valve body 1 and is fixed on the valve body 1.Coaxial and with the valve rod 4 that is threaded at retarder 10 output terminals 13, valve rod 4 moves up and down when retarder 10 slows down output.For making the gate valve trouble-free operation, between valve rod 4 and valve body 1, still be provided with boss 8 and groove 9 is slidingly matched.All rotating parts of present embodiment all are in the enclosed space of valve body 1, and are simple in structure, easy to use.As be applied to the other types valve, and design different rotor 2 by retarder 10 output terminals 13 and the Placement of valve rod 4 and the structure of valve body 1, other are still with above-mentioned.This example should adopt volume little, in light weight, the retarder 10 that reduction speed ratio is big, and as Chinese patent: CN2260920Y " interior three ring gear retarders ", these retarder 10 volumes are less, in light weight, and speed is suitable, and reliable operation can satisfy the valve technological requirement.This valve electric driver is identical with general valve in use, no specific (special) requirements.

Claims

1, a kind of valve electric driver, include valve body (1), rotor (2) and stator (3), wherein the electric power line is connected with stator (3) coil (11), valve body (1) center is equipped with valve rod (4), valve rod (4) one ends have spool, valve body (1) top is fixed with valve gap (6), rotor (2) places in the stator (3), coaxial with stator (3), stator (3) interfixes with valve body (1), it is characterized in that valve gap (6) places in the air gap between rotor (2) and the stator (3), valve gap (6) is tightly connected with valve body (1), and rotor (2) is fixedlyed connected with valve rod (4) or to be threaded.

2, the valve electric driver according to claim 1, it is characterized in that rotor (2) is rotatably installed on valve gap (6) and the valve body (1) with bearing (7), rotor (2) is with the valve rod that is threaded (4), valve rod (4) middle part is provided with boss (8), and the groove (9) on boss (8) and the valve body (1) is slidingly matched.

3, the valve electric driver according to claim 1 is characterized in that stator (3) coil (11) is connected with variable frequency power source.

4, the valve electric driver according to claim 1, it is characterized in that between rotor (2) and the valve rod (4) retarder (10) being installed, rotor (2) is rotatably installed on valve gap (6) and the valve body (1) with bearing (7), coaxial retarder (10) input end (12) that is fixedly connected on of rotor (2), retarder (10) is by valve gap (6) and valve body (1) sealing, be fixed on the valve body (1), retarder (10) output terminal (13) is fixedlyed connected with valve rod (4) or to be threaded.