CN201297396Y - Rectangular isolation air valve with safe position - Google Patents

Abstract

The utility model provides a rectangular isolation air valve with a safe position, wherein a valve body is a rectangular frame which is enclosed by mutually welding a short lateral plate 1, a short lateral plate 2 and a long lateral plate, and both sides of the short lateral plate 1, the short lateral plate 2 and the long lateral plate are corresponding; a valve seat and a seal ring are respectively welded and arranged on the short lateral plate 1, the short lateral plate 2 and the inner side of the long lateral plate; a bracket of a driving device is welded on the long lateral plate; a limit mechanism is connected to a corresponding position of the short lateral plate 2 by bolts, and two butterfly plates are arranged between the short lateral plate 2 and the long lateral plate; one end of a spring is hung on a fixed hole of the limit mechanism, and the other end of the spring is hung on a fixed hole specially arranged by the butterfly plates; the bracket and the driving device are connected by a pin shaft; a crankshaft 1 and a crankshaft 2 are respectively fixed on a shaft, a connecting rod and the crankshafts are connected by pin shafts, and a connecting rod mechanism is in threaded connection with the driving device; the long lateral plate and a support panel 1 as well as the long lateral plate and a support panel 2 are connected by bolts, and shaft fixing plates are respectively arranged on the support panel 1 and the support panel 2. The utility model has the function of still keeping the safe position in the closed state and has reliable sealing during the closing.

Description

A kind of rectangular isolation wind valve with home

Technical field:

The utility model is a kind of special valve that medium is isolated that is used for the industrial ventilation system, and it can pass through double-acting cylinder, straight stroke valve electronic (manually) device drives.The opening and closing time of valve is 2 seconds when adopting this valve of air cylinder driven.Valve is in closed position, even when running out of steam the source, valve still remains on the closed position of valve, and this valve Safety function has satisfied the design of industrial ventilation system reliable operation.The medium that this series of valves is suitable for is the air of air, coal gas, pollution etc., working pressure≤0.005MPa, operating temperature≤150 ℃, the specification 200 * 270～2000 * 1960 of valve.

Background technique:

The airtight separating valve of industrial ventilation system employing at present mostly is the circular secondary off-centre of Electric actuator driving or the valve of three eccentric butterfly valve structure.Rectangular duct is carried out the reducer pipe that closed type is isolated needs to adopt rectangle change circle, still adopt airtight butterfly valve that ventilation duct is isolated, cause pipe resistance to increase.These valves source valve that runs out of steam when all not possessing closed position still keeps the function of original position.

Summary of the invention:

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of have still keep the function of home when being in closed condition and reliable sealing rectangular isolation wind valve when closing.

For achieving the above object, the technological scheme that the utility model provides is: a kind of rectangular isolation wind valve with home, include valve body, butterfly plate, axle, linkage mechanism, spring, seal ring, position-limit mechanism, bearing unit, drive unit, valve body is to be welded to each other and the rectangular frame that surrounds by the short side plate one of two sides correspondence, short side plate two and long side plate, and the inboard welding seat of short side plate one, short side plate two and long side plate and seal ring is installed; Short side plate two and long side plate are provided with two bearing supports, welding drive unit support on the long side plate; Connect position-limit mechanism with bolt on short side plate two corresponding positions, two butterfly plates are set between short side plate two and the long side plate, axle passes the butterfly plate two ends and is arranged in bearing support on short side plate two and the long side plate, again with bolt connection upper bearing (metal) assembly; Load onto spring, spring one end hangs over the position-limit mechanism fixed hole, and the other end hangs over the ad hoc fixed hole of butterfly plate; Connect support and drive unit with bearing pin; Crank one and crank two are separately fixed on the axle, and connecting rod is connected with bearing pin with crank, and linkage mechanism is threaded with drive unit; Connect long side plate and supporting faceplate one, long side plate and supporting faceplate two with bolt, difference installation shaft fixed plate on supporting faceplate one and supporting faceplate two.

The utility model adopts leafy structural type, the linkage mechanism that the driving of blade had not only guaranteed the blade synchronization action by one but also had a reinforcement is realized, this linkage mechanism has guaranteed in the dead center position of valve closing position linkage mechanism, realizes the function of the maintenance home of valve; The compound motion of each blade has guaranteed to form between blade closed condition and the valve body and valve seat a complete sealing surface, the choose reasonable of sealing material, rationally the applying of external force on the butterfly plate guaranteed that valve in off position can reliable sealing, plays the buffer action to the medium in the pipeline.

Description of drawings:

Fig. 1 is the utility model Facad structure schematic representation.

Fig. 2 is the utility model side structure schematic representation.

Fig. 3 is the A-A sectional view of Fig. 1.

Fig. 4 is the structural representation of linkage mechanism.

Fig. 5 is the A place structure for amplifying schematic representation of Fig. 1.

Embodiment:

Originally the rectangular isolation wind valve that has home mainly is made up of valve body 1, butterfly plate 2, axle 3, linkage mechanism 4, spring 5, seal ring 6, position-limit mechanism 7, bearing unit 8, drive unit 9 etc.The critical piece material is stainless steel or carbon steel (alloyed steel).

See also Fig. 1, Fig. 2, shown in Figure 3, wherein valve body 1 is to be welded to each other and the rectangular frame that surrounds by short side plate one 1A, short side plate two 1B of two sides correspondence and long side plate 1C, and short side plate one 1A, short side plate two 1B and the inboard welding seat of long side plate 1C and seal ring 6 is installed; Short side plate two 1B and long side plate 1C are provided with two bearing support 1B1, and long side plate 1C goes up welding drive unit support 1D; On short side plate two 1B relevant positions, connect position-limit mechanism 7 with bolt.

See also Fig. 1, Fig. 3, shown in Figure 5, between short side plate two 1B and the long side plate 1C two butterfly plates 2 are set, axle 3 passes butterfly plate 2 two ends and is arranged in bearing support 1B1 on short side plate two 1B and the long side plate 1C, again with bolt connection upper bearing (metal) assembly 8; Load onto spring 5, spring 5 one ends hang over position-limit mechanism 7 fixed holes, and the other end hangs over the ad hoc fixed hole of butterfly plate 2.

See also Fig. 2, shown in Figure 4, connect support 1D and drive unit 9 with bearing pin; Crank one 4E and crank two 4F are fixed with respectively on the axle 3, and connecting rod is connected with bearing pin with crank, and linkage mechanism 4 is threaded with drive unit 9; Connect long side plate 1C and supporting faceplate one 1E, long side plate 1C and supporting faceplate two 1F, installation shaft fixed plate 1G and 1H on supporting faceplate one 1E and supporting faceplate two 1F with bolt.

Originally have the rectangular isolation wind valve reinforcement of home and keep the home function:

See also shown in Figure 4, structural representation for this valve (valve with two butterfly plates is an example) linkage mechanism, this mechanism is a planar linkage, form by 9 movable parts, the degrees of freedom W=9 of planar mechanism * 3-2 * 13=1 guarantees connecting rod proper functioning under the situation of having only a power source.Drive unit 9 is a cylinder block hinged on valve body, and among the figure, part 4A is a cylinder column, is driving lever, and part 4B, 4C, 4D, 4G, 4H are connecting rod, and part 4E, 4F are for driving the crank that butterfly plate rotates.The mechanism that part 4B, 4C, 4D form is that boosting mechanism is at shown position, driving lever applies a less power, the very big power that has passes to crank one 4E by part 4D, make butterfly plate obtain bigger sealed force moment, guarantee valve closing state place air-tight state, effectively airflow partition plays the buffer action to medium.This moment, linkage mechanism was in a dead center position as we can see from the figure, applied external force even without driving lever, and mechanism also is in this position, promptly loses under the situation of source of the gas or power supply in this position, and valve still is in home.Connecting rod 4B, 4C, 4H are that a parallel mechanism has guaranteed crank one 4E and 4F synchronous operation, make a plurality of blades of big specification valve realize synchronization motion.

The airtight isolation features of this quick closedown isolation rectangular wind valve is achieved in that

The rectangle butterfly valve will be realized a complete sealing surface, butterfly plate 2 can not directly link to each other with axle 3, originally the seal valve seat that has the rectangular isolation wind valve of home is installed on the valve body 1, the butterfly plate 2 of this valve is a compound motion, and beginning rotatingshaft 3 is under the effect of spring 5 between butterfly plate 2 and the cantilever 2B, seal ring 6 is left in butterfly plate 2 translations, butterfly plate 2 together rotates with axle 3 then, opens valve, and is provided with the adjustable limiting mechanism 7 that guarantees the valve open angle.Need rationally to select for use the rubber of low hardness to do seal element simultaneously, guarantee under 4000Pa, valve internal leakage rate≤10Nm ³/ h.m ²Owing to do not have relative movement between butterfly plate sealing surface and the seal ring 6, to compare with common butterfly valve, rubber parts increases working life, and sealing reliability strengthens.

Claims (1)

1, a kind of rectangular isolation wind valve with home, include valve body (1), butterfly plate (2), axle (3), linkage mechanism (4), spring (5), seal ring (6), position-limit mechanism (7), bearing unit (8), drive unit (9), it is characterized in that: valve body (1) is to be welded to each other and the rectangular frame that surrounds by the short side plate one (1A) of two sides correspondence, short side plate two (1B) and long side plate (1C), and short side plate one (1A), short side plate two (1B) and the inboard welding seat of long side plate (1C) and seal ring (6) is installed; Short side plate two (1B) and long side plate (1C) are provided with two bearing supports (1B1), and long side plate (1C) is gone up welding drive unit support (1D); On short side plate two (1B) relevant position, connect position-limit mechanism (7) with bolt, between short side plate two (1B) and the long side plate (1C) two butterfly plates (2) are set, axle (3) passes butterfly plate (2) two ends and is arranged in bearing support (1B1) on short side plate two (1B) and the long side plate (1C), again with bolt connection upper bearing (metal) assembly (8); Load onto spring (5), spring (5) one ends hang over position-limit mechanism (7) fixed hole, and the other end hangs over the ad hoc fixed hole of butterfly plate (2); Connect support (1D) and drive unit (9) with bearing pin; Crank one (4E) and crank two (4F) are separately fixed on the axle (3), and connecting rod is connected with bearing pin with crank, and linkage mechanism (4) is threaded with drive unit (9); Connect long side plate (1C) and supporting faceplate one (1E), long side plate (1C) and supporting faceplate two (1F) with bolt, go up installation shaft fixed plate (1G, 1H) respectively at supporting faceplate one (1E) and supporting faceplate two (1F).

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