CN205001622U - Stable in structure's butterfly valve sealed firmly - Google Patents

Abstract

The utility model belongs to the technical field of the butterfly valve is used and a stable in structure's butterfly valve sealed firmly is disclosed, including pneumatic actuator, pneumatic actuator top installation air source processor to air source processor passes through the air supply connecting pipe and installs the solenoid valve intercommunication at the pneumatic actuator lateral wall, air source processor one side sets up the signal switch box, the inside valve rod that sets up of pneumatic actuator bottom mounting support and support, the support bottom sets up disk seat and the inside case that sets up of disk seat, valve rod one end is connected with the case with the pneumatic actuator internal connection and the valve rod other end, pneumatic actuator includes the cylinder body, the cylinder body is inside to be set up piston and piston and passes through pre compressed spring and be connected with the cylinder head of installing the cylinder body on one side of, the piston outside sets up the axle bush and is located inside the cylinder body, the cylinder body is inside to be set up tooth axle and tooth axle bottom perpendicularly and passes through the bearing and be connected with the valve rod, this kind of stable in structure's butterfly valve sealed firmly compact structure, the reliability is high.

Description

A kind of constitutionally stable hard seal butterfly valve

Technical field

The utility model relates to a kind of butterfly valve, and particularly the constitutionally stable hard seal butterfly valve of one, belongs to machine applications technical field.

Background technique

Along with the progress of industrial technology, butterfly valve is applied to every field, butterfly valve is Flap valve again, it is the simple modulating valve of a kind of structure, also can be used for the switch control rule of low pressure pipeline medium simultaneously, butterfly valve refers to that closure member is disk, rotates a kind of valve reaching open and close around valve rod, and on pipeline, main rising is cut off and throttling action.Butterfly valve open-shut device is a discoidal butterfly plate, rotate around the axis of himself in valve body, thus reach the object opening and closing or regulate, butterfly valve is applicable to carry on the pipeline of various corrosivity, non-corrosive fluids medium in the engineering systems such as producer, coal gas, rock gas, liquefied petroleum gas (LPG), town gas, air, chemical industry smelting and generation environment-friendly, for regulating and block the flowing of medium, therefore, the performance of butterfly valve plays an important role to various Cemented filling material.

There is many deficiencys in the butterfly valve of current existence, as the common butterfly valve in use stifled card of valve plate, return difference is large, dead band is large, action is insensitive, effective output torque loss is large, and friction is large, easily leakage phenomenon occurs, butterfly valve body is connected with actuator and adopts crank-connecting rod mode to make butterfly valve in use poor reliability, butterfly valve performance is not reflected, and on the other hand, current butterfly valve boundary dimension is large, heavy, butterfly valve is installed and used and difficult in maintenance etc., therefore, propose a kind of constitutionally stable hard seal butterfly valve for the problems referred to above.

Summary of the invention

The technical problems to be solved in the utility model overcomes existing defect, a kind of constitutionally stable hard seal butterfly valve is provided, by adopting direct mode between valve body and actuator and valve plate adopts the multi-level or hard seal form of individual layer, there is good airproof performance, reliability is high, compact structure, the advantages such as size is little, effectively can solve the problem in background technique.

In order to solve the problems of the technologies described above, the utility model provides following technological scheme:

A kind of constitutionally stable hard seal butterfly valve of the utility model, comprise pneumatic actuator, air-source treater is installed on described pneumatic actuator top, and air-source treater is communicated with the solenoid valve being arranged on pneumatic actuator sidewall by source of the gas connecting tube; Described air-source treater side signalization switch capsule; Described pneumatic actuator bottom fixed support and internal stent arranges valve rod; Described support bottom arranges valve seat and valve seat inside arranges spool; Described valve rod one end is connected with pneumatic actuator inside and the valve rod the other end is connected with spool; Described pneumatic actuator comprises cylinder body; Described cylinder interior arranges piston and piston is connected with the cylinder head being arranged on cylinder body side by loaded spring; Described piston arranged outside bearing shell and described piston is positioned at cylinder interior; Described cylinder interior vertically arranges tooth axle and tooth axle bottom is connected with valve rod by bearing.Making structure more stable by arranging support, increasing its working life.

As a kind of optimal technical scheme of the present utility model, also comprise valve plate, seat ring, packing ring and O type circle; Fix valve plate outside described spool and valve plate be positioned at be arranged on valve seat inside seat ring inside; Described tooth axle top is connected with the bearing being arranged on cylinder body top by O type circle, and arranges packing ring between tooth axle and bearing.

As a kind of optimal technical scheme of the present utility model, described valve plate is a kind of circular valve plate of the multi-level or hard seal form of individual layer.

As a kind of optimal technical scheme of the present utility model, described valve rod is a kind of valve rod of cylindrical structural and valve rod is fixed on the Bearing inner of pneumatic actuator bottom.

As a kind of optimal technical scheme of the present utility model, described valve plate and spool form two eccentric structure.

As a kind of optimal technical scheme of the present utility model, described piston is a kind of piston of cylindrical structure.

The beneficial effect that the utility model reaches is:

1, compact structure, working life is of a specified duration;

2, open-close convenient is rapid, laborsaving, fluid resistance is little, can often operate, and structure is simple, and boundary dimension is little, and structure length is short, and volume is little, lightweight, is applicable to heavy caliber, middle pressure, and temperature is not high, leaks and requires high occasion;

3, adjusting function is good, and reliability is high, and during standard-sized sheet, valve base channel valid circulation area is comparatively large, and fluid resistance is less, and open and close moment less, sealing surface increases by one oblique cone bias makes valve seal performance good, has good economic benefit and social benefit.

Accompanying drawing explanation

Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, does not form restriction of the present utility model with embodiment one of the present utility model.

In the accompanying drawings:

Fig. 1 is the overall structure schematic diagram of a kind of constitutionally stable hard seal butterfly valve described in the utility model;

Fig. 2 is one described in the utility model constitutionally stable hard seal butterfly valve pneumatic actuator overall schematic;

Fig. 3 is one described in the utility model constitutionally stable hard seal butterfly valve pneumatic actuator structural blast figure;

Number in the figure: 1, air-source treater; 2, source of the gas connecting tube; 3, solenoid valve; 4, pneumatic actuator; 5, valve rod; 6, support; 7, seat ring; 8, spool; 9, signaling switch box; 10, cylinder head; 11, valve seat; 12, valve plate; 41, loaded spring; 42, piston; 43, cylinder body; 44, packing ring; 45, bearing shell; 46, O type circle; 47, tooth axle; 48, bearing.

Embodiment

Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the utility model, and be not used in restriction the utility model.

Embodiment: as Figure 1-3, a kind of constitutionally stable hard seal butterfly valve of the utility model, comprise pneumatic actuator 4, air-source treater 1 is installed on described pneumatic actuator 4 top, and air-source treater 1 is communicated with the solenoid valve 3 being arranged on pneumatic actuator 4 sidewall by source of the gas connecting tube 2; Described air-source treater 1 side signalization switch capsule 9; Described pneumatic actuator 4 bottom fixed support 6 and support 6 inside arranges valve rod 5; Described support 6 bottom arranges valve seat 11 and valve seat 11 inside arranges spool 8; Described valve rod 5 one end is connected with pneumatic actuator 4 inside and valve rod 5 the other end is connected with spool 8; Described pneumatic actuator 4 comprises cylinder body 43; Described cylinder body 43 inside arranges piston 42 and piston 42 is connected with the cylinder head 10 being arranged on cylinder body 43 side by loaded spring 41; Described piston 42 arranged outside bearing shell 45 and to be positioned at cylinder body 43 inner; Described cylinder body 43 internal vertical arranges tooth axle 47 and tooth axle 47 bottom is connected with valve rod 5 by bearing 48.Making overall structure more stable by arranging support 6, increasing its working life.

In order to make this kind of butterfly valve volume less, surface friction drag is little, and return difference is little, also comprises valve plate 12, seat ring 7, packing ring 44 and O type circle 46; Fix valve plate 12 outside described spool 8 and valve plate 12 be positioned at be arranged on valve seat 11 inside seat ring 7 inside; Described tooth axle 47 top is connected with the bearing 48 being arranged on cylinder body 43 top by O type circle 46, and arranges packing ring 44 between tooth axle 47 and bearing 48; Described valve plate 12 is a kind of circular valve plate 12 of the multi-level or hard seal form of individual layer; Described valve rod 5 is a kind of valve rod 5 of cylindrical structural and valve rod 5 bearing 48 that is fixed on pneumatic actuator 4 bottom is inner; Described valve plate 12 and spool 8 form two eccentric structure; Described piston 42 is a kind of cylinder type piston 42, makes this kind of butterfly valve more of a specified duration for working life, low cost of manufacture.

In use of the present utility model, butterfly valve makes open-shut device with circular butterfly plate 12 and rotates a kind of valve opening, cut out and regulate fluid passage with valve rod 5, the butterfly plate 12 of butterfly valve is installed on the diametric(al) of pipeline, in butterfly valve body cylindrical channel, disc butterfly plate rotates around axis, angle of swing is between 0 ° ~ 90 °, and when rotating to 90 °, valve is board full-gear then.

Working principle of the present utility model, when the control section of pneumatic actuator 4 accepts the signal of self tuning regulator and the opening amount signal from Measuring opening part, by two signals relatively and amplify, to eliminating the direction driving of its difference and controlling motor generation thrust, by connecting to come the rotation with movable valve plug 8, thus change the circulation area of spool 8 and valve seat 11, until eliminate two-part deviation, motor quits work, spool stop motion, once reaches the object automatically regulating and cut off.

The utility model application notice, the relation between the aperture of butterfly valve and flow, substantially linearly ratio change.If for controlling flow, the flow resistance of its Flow characteristics and pipe arrangement also has substantial connection, as two Pipe installing valve apertures, forms etc. are entirely identical, and pipe loss coefficient is different, the flow difference of valve also can be very large, if valve is in the larger state of throttling amplitude, easily cavitate in the back side of valve plate, there is the possibility damaging valve, generally all use outward at 15 °, when butterfly valve is in middle aperture, the opening shape that valve body and butterfly plate front end are formed is centered by valve shaft, both sides have formed different states, the butterfly plate front end of side is moved along current direction, opposite side counter-flow water direction and moving, therefore, side valve body and valve plate are formed like nozzle shape opening, the similar throttling bore openings of opposite side, nozzle side is faster than throttling effluent fast many, and negative pressure below throttling side valve door, can be produced, often occur that rubber seal comes off.Butterfly valve operational torque, because aperture and valve opening and closing direction its value different is different, horizontal butterfly valve, particularly large diameter valve, due to the depth of water, the moment that the upper and lower head difference of valve shaft produces also can not be ignored.In addition, during the device elbow of valve inlet side, form bias current, moment has increase.Valve mediate aperture time, because water flow moment works, operating device needs self-locking.

Last it is noted that the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although be described in detail the utility model with reference to previous embodiment, for a person skilled in the art, it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (4)

1. a constitutionally stable hard seal butterfly valve, comprise pneumatic actuator (4), it is characterized in that, air-source treater (1) is installed on described pneumatic actuator (4) top, and described air-source treater (1) is communicated with the solenoid valve (3) being arranged on pneumatic actuator (4) sidewall by source of the gas connecting tube (2); Described air-source treater (1) side signalization switch capsule (9); Described pneumatic actuator (4) bottom fixed support (6) and support (6) inside arranges valve rod (5); Described support (6) bottom arranges valve seat (11) and valve seat (11) inside arranges spool (8); Described valve rod (5) one end is connected with pneumatic actuator (4) inside and valve rod (5) the other end is connected with spool (8); Described pneumatic actuator (4) comprises cylinder body (43); Described cylinder body (43) inside arranges piston (42) and piston (42) is connected with the cylinder head (10) being arranged on cylinder body (43) side by loaded spring (41); It is inner that described piston (42) arranged outside bearing shell (45) and described piston (42) are positioned at cylinder body (43); Described cylinder body (43) internal vertical arranges tooth axle (47) and tooth axle (47) bottom is connected with valve rod (5) by bearing (48).

2. the constitutionally stable hard seal butterfly valve of one according to claim 1, is characterized in that, also comprises seat ring (7), packing ring (44) and O type circle (46); Described tooth axle (47) top is connected with the bearing (48) being arranged on cylinder body (43) top by O type circle (46), and arranges packing ring (44) between tooth axle (47) and bearing (48).

3. the constitutionally stable hard seal butterfly valve of one according to claim 1, is characterized in that, the bearing (48) that the valve rod (5) that described valve rod (5) is cylindrical structural and valve rod (5) are fixed on pneumatic actuator (4) bottom is inner.

4. the constitutionally stable hard seal butterfly valve of one according to claim 1, is characterized in that, described piston (42) is set to cylindrical structure.