CN1360166A

CN1360166A - Blind-plate valve

Info

Publication number: CN1360166A
Application number: CN 02100351
Authority: CN
Inventors: 李玉清
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-15
Filing date: 2002-01-15
Publication date: 2002-07-24
Anticipated expiration: 2022-01-15
Also published as: CN100378382C

Abstract

An improved blind-plate valve is characterized by that the cross rib plates at both sides of corrugated pipe on valve body and the axial push-pull output unit are used to replace original locking mechanism of toothed ring and screw bolt. A sealed parallelogram connecting-rod unit and a half nut matched with leading screw are used to regulate the gap of valve body and seal the valve plate. Its advantages are simple structure, high seal performance and long service life.

Description

A kind of blank-plate valve

Technical field

The invention belongs to industrial special valve, particularly be applied in coal gas, rock gas, the harmful poisonous inflammable chemical gases transfer canal,, do absolute cut-out and use to prevent leakage in maintenance or the maintenance.

Background technique

Poisonous, harmful, inflammable gas is an indispensable raw material in the chemical industry, and coal gas then is fuel necessary in the daily life, also is applied in the occasion of metallurgy, generating and other heating in large quantities.Requirement in " industrial gas safety specification ", it is absolute cut-out to the technical requirements of cutting off, applied is exactly this special valve that is called as blank-plate valve.It is connected in the pipeline usually, does not regulate flow or the common unlatching and the effect of closed procedure but do not do, but individual standby valve.When running well, it is in opening state, the pipe valve below valve needs to check, maintenance, when changing, it be closed with below the pipeline of guaranteeing to overhaul without any leakage.For guaranteeing this point, blank-plate valve has all been set up a valve plate assembly on valve body.Assembly comprises a transportable valve plate, and a through hole, a blind hole are arranged on the valve plate, through hole is advanced clamping locking valve body promptly is in opening state behind the valve body.With blind hole advance valve body again clamping locking promptly be in closed condition.Even have this moment leakage also can only leak into atmosphere, and can not return the pipeline behind the valve, promptly be called absolute closed condition along blind hole edges of boards edge.Also comprise the track that the support frame that is located on the valve body and valve plate slide in the valve plate assembly, to guarantee the in good time conversion of slide-valve Board position.For guaranteeing the conversion of the valve plate evolution and the state of keying, in the prior art valve body is designed to the left, center, right three stage structure, the intermediate section valve body forms elasticity with the right side or left valve barrel (among this case embodiment being and right valve barrel) by bellows and is connected, between middle valve body and another segment body is valve plate, regulate two sections spacings between valve body by connection and locking device between two sections, thereby finish the clamping of valve plate locking or unclamp.In order to realize this controlling device automation, often to outside valve body, design complicated synchronous bull gear and drive each bolts and screw synchronously or loosen, and with a plurality of gear mesh mechanism, bulky complex operate loaded down with trivial detailsly and slow, cost is costliness very.And synchronous drive is not ideal enough, cause chucking power inhomogeneous when particularly the valve body planeness is bad, the position that clamps forms fulcrum earlier, causes poorly sealed, cause a large amount of leakage environmental pollutions and the health of field worker all to work the mischief, also can directly cause the damage of valve.Particularly valve plate often is insurmountable contradiction because of operating the environmental loss that slowly causes between transfer period.

Summary of the invention

The present invention is the improvement to present blank-plate valve structure.At present valve body three stage structure; emphasis improves the adjustment and the locking mechanism of distance between two sections valve bodies of clamping sealing valve plate; make every effort to designs simplification; reduce volume; easy and simple to handle rapid, even, the coordination of chucking power, sealability is strengthened; reveal protection environment and operator's safety with thorough solution.

Key of the present invention is the locking device of spacing between valve body in regulating and the left valve barrel (also can be right valve barrel certainly) is converted into internally-arranged type by externally-arranged type, is about to locking device and has been located at valve inner.Concrete mode can adopt two crossed stiffened plates that are positioned on the valve body of bellows both sides, and a push-pull effort output unit is set between two crossed stiffened plates.Like this, the valve section is shunk in output is during pulling force, in, the intersegmental crack of left valve becomes big, can substitute the valve plate position, thrust output behind the valve plate evolution, stage casing valve body and left side section valve body pitch smaller clamp valve plate and sealing.So just can finish conversion and sealing at an easy rate by controlling this push-pull effort output unit to the valve plate position.Because the crossed stiffened plate center is stressed, its pressure to sealing surface is evenly regulated automatically, has overcome the potential threat to valve safety that the fulcrum phenomenon causes.Particularly designs simplification can make the cost of this product obviously descend.

To the objective of the invention is how to realize in order further specifying, will and to further specify in conjunction with the accompanying drawings by following examples.

Description of drawings

Accompanying drawing 1 is structural representation of the present invention (front view).

Accompanying drawing 2 is the left view of accompanying drawing 1.

Accompanying drawing 3 is the partial top view of accompanying drawing 1.

Accompanying drawing 4 is that B in the accompanying drawing 2 is to zoomed-in view.

Accompanying drawing 5 is the top plan view of accompanying drawing 4.

Accompanying drawing 6 is another embodiment's a structural representation.

Wherein 1 represent left valve barrel, 2 represent valve plate, and 3 represent the feeding roller in the valve plate assembly, and 4 represent the gearbox in the valve plate assembly, 5 represent motor, 6 represent the supporting frame of valve plate assembly, valve body in 7 representatives, crossed stiffened plate before the 7A representative, 8 represent bellows, 9 represent right valve barrel, and 9A represents the back crossed stiffened plate, and 10 represent the push-pull effort output unit, 11 represent dust-proof cover, 11A represents the dust-proof cover front cover, the dustproof rear end cover of 11B representative, and 12 represent the leading screw line shaft, 13 represent small corrugated pipe, 14 represent the lever in the parallelogram sturcutre, and 14A represents the little hinge axis in the parallelogram sturcutre, and 14B is the otic placode with the parallelogram sturcutre hinge, 14C is the half nuts of band hinge axis, the dustproof bushing pipe of 15 representatives, the oval orifice plate of 16 representatives, 17 representatives are with the line shaft of eccentric spindle nose.

Embodiment

This improved essence is the dispersion bolt of the synchronous bull gear driving of complexity to be locked replace with simple switching structure, and external means should be simplified the structure though increased flow resistance greatly for being provided with in the valve body.The diesis gusset switching structure of being taked can be eliminated the fulcrum phenomenon effectively, and the sealing effect of blank-plate valve is improved greatly, and needed push-pull effort output mechanism specifically can be realized by a parallelogram linkage (14,14A, 14B).Referring to accompanying drawing 4,5, can clearly be seen that this push-pull effort output unit is made up of the half nuts (14C) and the leading screw line shaft (12) of parallelogram linkage (14,14A, 14B), band hinge axis, the rotation of leading screw line shaft 12, make the nut 4 of band hinge axis produce open and close movement, produce axial repeating motion thereby drive the end cap otic placode 14 that links with parallel-crank mechanism.Consequently produce thrust or pulling force, realize spacing adjustment and locking between stage casing valve body 7 and the left valve barrel 1 to preceding crossed stiffened plate 7A.Above-described whole mechanism is arranged among the sealing and dustproof cover 11.The dustproof front end 11A of dust-proof cover is by otic placode 14B and parallel-crank mechanism hinge joint and is fixed on the preceding crossed stiffened plate 7A, so not only can be well with to the thrust of preceding crossed stiffened plate 7A and tension uniform be applied on the valve body of stage casing, and prevented from effectively the pollution of dust-contained airflow in the valve body to have realized the design of built-in sealed type locking mechanism.The little hinge axis of in the parallelogram sturcutre another is positioned on the sealing and dustproof cover rear end cover 11B, and this rear end cover 11B is fixed on the dust-proof cover 11.Leading screw line shaft 12 passes right valve barrel 9 and links to each other with external impetus from sealing and dustproof bushing pipe 15.Just formed in the dust-proof cover 11 like this and the complete isolation in valve inner space, can in high dirt air-flow, use and guarantee the high degree of flexibility of push-pull effort output mechanism and reliability at random.

Accompanying drawing 6 has provided the plan of another kind of axial push-pull effort output unit.This axial push-pull effort output unit is an oval orifice plate 16 and a driving mechanism combining with the line shaft 17 of eccentric spindle nose.Its eccentric spindle nose forms axial break-in driving force during line shaft 17 rotations in oval orifice plate 16, thereby make the front cover 11A of dust-proof cover 11 produce the to-and-fro motion that pushes away and draw, its result also can form the adjustment of spacing between stage casing valve body 7 and the left valve barrel 1 and locking valve plate 2.But, this class device by the moment of torsion passing shaft to push-and-pull action power, its mechanical efficiency is low, power consumption is big, line shaft is wanted overstriking, in fact its flexibility and reliability are all not as the former.

Crossed stiffened plate in the above structure can be according to the different bifurcation fonts that adopt three gussets to be combined into of the bore of blank-plate valve, star-like and 6 rice fonts that gusset is combined into that also can adopt 5 gussets to be combined into, to guarantee that axle center thrust guarantees airtight quality to the uniformity of valve body face generation pressure under the different occasions.

In a word, take above mode can realize the hermetically sealed technological scheme that built-in axle center drives, it is simple in structure, and flexible operation is with low cost, and good sealing effect is a significant improvement to blank-plate valve.

Claims

1, a kind of blank-plate valve, by a left side, in, right three sections valve bodies (1,7,9) constitute a combined type valve body, wherein stage casing valve body (7) fuses by bellows (8) with right valve barrel (9), by gap between valve body (7) and left valve barrel (1) in the axial locking device adjusting and clamping sealing valve plate (2), the support and slide mechanism (13) and the driving mechanism (4 that also comprise valve plate (2) in the structure, 5,6) the valve plate assembly of each several part composition, in it is characterized in that regulating between valve body (7) and the left valve barrel (1) locking device in gap be arranged on valve inner, by two cross gusset (7A that are positioned on the valve body of bellows (8) both sides, 9A) and be positioned at axially pushing away between its two gusset, the pulling force output unit is formed.

2, according to the said blank-plate valve of claim 1, it is characterized in that axially pushing away, the pulling force output unit is by parallelogram linkage (14,14A, 14B), the half nuts (14C) and the leading screw line shaft (12) of band hinge axis are formed, all mechanism is assembled in the sealing and dustproof cover (11), be positioned on the preceding crossed stiffened plate (7A) on the stage casing valve body (7) with the seal closure front cover (11A) of parallelogram linkage hinge joint, and by small corrugated pipe (13) and dust-proof cover (11) realization flexible connection, another hinge axis in the parallelogram sturcutre is positioned on the rear end cover (11B) of sealing and dustproof cover (11), seal closure (11) is positioned on the right section valve body (9) by back crossed stiffened plate (9A), and leading screw line shaft (12) passes with external motive device from sealing and dustproof bushing pipe (15) and links to each other.

3, according to the said blank-plate valve of claim 1, it is characterized in that axially pushing away, the pulling force output unit is to be positioned between two crossed stiffened plates (7A, 9A), be assembled in the seal closure (11), form by the seal closure front cover (11A) of small corrugated pipe (13) connection and with the oval orifice plate (16) of front cover (11A) interlock with the line shaft (17) of eccentric spindle nose, line shaft (17) with eccentric spindle nose passes from dustproof bushing pipe (15), links to each other with external motive device.

4,, it is characterized in that crossed stiffened plate (7A, 9.A) also can be made of star-like gusset, rice font gusset or bifurcation type gusset according to the said blank-plate valve of claim 1.