CN2777296Y

CN2777296Y - Dispersing valve

Info

Publication number: CN2777296Y
Application number: CN 200520023404
Authority: CN
Inventors: 陈晓光; 齐彩英; 周丽娟; 王晓丽
Original assignee: QINHUANGDAO METALLURGICAL MACHINERY CO Ltd
Current assignee: Qinhuangdao Metallurgical Heavy Industry Co., Ltd.
Priority date: 2005-01-20
Filing date: 2005-01-20
Publication date: 2006-05-03
Anticipated expiration: 2015-01-20

Abstract

The utility model relates to a releasing valve which is used for discharging blast furnace gas. The releasing valve is provided with a hinge four-link mechanism which is arranged on a supporting base of a valve body and assembled with a driving hydraulic cylinder and a pressing device of a pretensioning spring. The front ends of rotating arms of which the link mechanism is composed are connected with a valve cover through guide rods, assembled springs, an upper set of spherical surface matching pairs and a lower set of spherical surface matching pairs. A spherical surface hard sealing pair and a soft sealing auxiliary pair are arranged on the valve cover and a sealing rabbet of a valve body, wherein the spherical surface hard sealing pair is formed from hard alloy in the method of surfacing and the soft sealing auxiliary pair is composed of inlaid silicon rubber rings. The utility model has the advantages that the systematic structure is simple, the operation of a mechanism is flexible, the aligning performance and the sealability of the valve cover and the valve body are good, the impact force and the frictional force when sealing surfaces contact each other are small and the service life of the valve is long.

Description

Diffuse valve

Technical field

The utility model relates to valve, is a kind of valve that diffuses that is used for the blast furnace gas discharging specifically.

Background technique

Can promptly blast furnace gas be entered in the atmosphere when adapting to blast furnace staying, in the blast furnace gas system pipeline, need to be provided with and diffuse valve.The valve that diffuses that is used for blast furnace gas discharging at present normally utilizes winch to carry out the unlatching of valve by the wire rope actuating linkage or cuts out.The weight of the balancer weight that inserts by the lever the other end when its valve cuts out compresses valve gap, realizes the sealing of valve gap and valve body.The problem of its existence is that to diffuse valve system loosely organized, and valve gap and valve body poor to neutrality easily caused the wearing and tearing of sealing surface, and the sealing reliability that valve is diffused in influence reduces the working life of diffusing valve.In order to address the above problem, prior art discloses several hydraulic driving linkage types and has diffused valve.It adopts the Driven by Hydraulic Cylinder connecting rod to finish the opening and closing of valve, utilizes holddown spring to make valve gap and valve seal, and adopts bulb to connect valve cover structure, and makes the sealability of diffusing valve and improve working life and improve.But its structural design is in the centering performance of the sealing load that improves valve gap and valve gap and valve seat and alleviate aspect the wearing and tearing between sealing surface, still exists some that problem to be solved is arranged.

Summary of the invention

The purpose of this utility model is at the problems referred to above, provides a kind of system architecture compactness, valve bonnet seal pressure big, valve gap and valve body to neutrality and good airproof performance, light abrasion between sealing surface, long service life diffuse valve.

The technological scheme that realizes above-mentioned purpose is: a kind of valve that diffuses, include valve body, with the valve gap of valve body configuration be connected with valve gap and connecting rod valve gap opening/closing mechanism by Driven by Hydraulic Cylinder, its rear end of forming the pivoted arm of connecting rod valve gap opening/closing mechanism is hinged with the upper end that is fixedly connected on the bearing of valve body one side, the front end of pivoted arm vertically is coated with guide rod, upper end at guide rod is equipped with the attaching nut successively, spring, spill bearing shell that matches and convex bearing shell, the fixedly connected valve gap in the lower end of guide rod also is provided with outer spherical surface watt seat and the inner ball surface watt seat that matches between valve gap and pivoted arm; Hinging shaft through placing the bearing inboard on bearing is equipped with the dwang of a cavity type, in dwang, be provided with the pretension bar of pocketed springs, the upper end of pretension bar is provided with pre-load nut, below pre-load nut, be slidingly matched and be provided with slide plate with the pretension bar, hinge is connected to connecting rod at the middle part of pivoted arm, and the upper end and the slide plate of its connecting rod are hinged; Be installed in the outside of bearing as the oil hydraulic cylinder of the driveshaft gudgeon through placing the middle part, the front end of hydraulic cylinder piston rod and the lower end of dwang are hinged.

The technical solution of the utility model also comprises: the sealing seam of valve gap and valve body is provided with the hard sealing pair of sphere of pile-up welding hard alloy formation and the soft seal pair that the insert silicon rubber loop constitutes.

The structural design of originally diffusing valve has following advantage:

1, utilize hydraulically powered quadratic crank mechanism to finish the keying of valve gap, and assembly pretightening spring device for exerting, being fit to furnace top pressure does not leak from 0.1Mpa to 0.3Mpa, according to the difference of furnace top pressure, can adjust pre-load nut, easy and simple to handle, compact structure, good integrity, easy for installation, to adjust flexibly, sealing is reliable.And because in the process that opens and closes, valve gap is done the relative translation campaign with valve body valve gap when contacting and break away from, and to the light abrasion of sealing surface, can effectively improve the working life of diffusing valve.

2, because valve gap has adopted the elasticity centering body, it is good in neutrality to make that valve gap and valve body have, and the return precision is accurate, the wearing and tearing when further having alleviated opening and closing between sealing surface, and the effective raising sealing reliability of diffusing valve.

3, adopt soft, hard double seal, sealing reliability height between valve gap and the valve body.Its hard sealing adopts Hardmetal materials to be arranged to the sphere cooperating structure, places the inboard of sealing seam, and resistant to elevated temperatures silicon rubber loop mosaic structure is adopted in soft seal, places the outside of sealing seam, its good seal performance, and preparation process is simple, and it is convenient to change.

Description of drawings

Fig. 1 originally diffuses the valve arrangement plan view;

Fig. 2 is pivoted arm and head cover engaging structure sectional view;

Fig. 3 is valve gap and valve seal structure partial sectional view.

Embodiment

Embodiment describes embodiment of the present utility model in conjunction with the accompanying drawings:

Provide as accompanying drawing 1, accompanying drawing 2, originally diffuse valve and include columnar valve body 11, the valve body 11 shown in the accompanying drawing 1 is connected to form through bolt by two-part up and down, is convenient to processing and assembling.Be provided with valve gap 10 in the upper end of valve body.A side and valve body stationary phase at valve body are connected to the bearing 1 that constitutes by with respect to valve body center line symmetrically arranged two vertical support plates.Above bearing, be horizontally arranged with pivoted arm 3, this pivoted arm structure that takes the shape of the letter U, two branch end of one side are hinged and connected to the top of 1 liang of support plate of bearing respectively through bearing pin, opposite side vertically installs a guide rod 16 in the top of valve gap and valve body and valve gap concentric, assembles attaching nut 12, belleville spring 13 successively in the upper end of guide rod, has the spill bearing shell 14 and the convex bearing shell 15 of circular arc fitting surface.Among the accompanying drawing embodiment, add spring protecting sleeve between nut and the spring, install spring seat additional between spill bearing shell and the spring.Caulking groove through being opened on the pivoted arm below pivoted arm is equipped with outer spherical surface watt seat 17, matches with outer spherical surface watt seat to be provided with the inner ball surface watt seat 18 that is sleeved on the guide rod, and the lower end of guide rod is through the valve gap 10 that is connected of square guide rod plush copper and valve gap lower end square groove.The guide rod linkage structure of above-mentioned spring and two groups of sphere matching pairs, can make valve gap when opening and closing in axially and radially having automatic adjustment position functions, thereby guarantee the identical precision of valve gap with respect to valve body, the wearing and tearing that alleviate sealing surface improve the sealability of diffusing valve.Between 1 liang of support plate of bearing and be equipped with the dwang 9 of a cavity type through coupling shaft near a side of valve body, in the cavity of dwang, be provided with the pretension bar 5 of assembling disk spring 8, be equipped with pre-load nut 6 in the upper end of pretension bar, the slide plate 7 that is slidingly matched with the pretension bar is set below pre-load nut 6.Both sides at pivoted arm 3 are connected on the hinging shaft of slide plate both sides by the symmetrical upper end that is connected to connecting rod 4, two connecting rods 4 that is hinged of bearing pin respectively in medium position.According to the working pressure situation of diffusing valve, by adjusting pre-load nut 6, can finish the adjustment of seal pressure between valve gap and the valve body, and guarantee that sealing is reliable, being connected with bearing by the gudgeon that places the middle part by the outside of bearing 1 between two support plates is equipped with oil hydraulic cylinder 2, and the lower end of the front end of its hydraulic cylinder piston rod and dwang 9 is hinged through bearing pin.

Originally diffuse valve when work, drive the hydraulic cylinder piston rod elongation or shrink, dwang is rotated around the bearing coupling shaft, and the drivening rod motion, connecting rod drives pivoted arm and rotates relative to its bearing articulating point, the unlatching of realization valve gap or close.And when valve gap is closed, utilize the pretightening force of preloading spring to pressurize to valve gap.The configuration of its oscillating motor and kink four bar linkage makes the moment of valve gap opening and closing make approximate straight line motion, has the opening time weak point, and sealing surface is subjected to frictional force and the little characteristics of impact force.

Provide as accompanying drawing 3, originally diffuse and adopt soft, hard double seal between the valve gap of valve and the valve body, hard sealing by on valve gap and valve seal seam respectively corrosion-resistant, high temperature resistant, the anti abrasive cemented carbide 19 of built-up welding constitute, its sealing pair adopts sphere cooperating structure, places to seal the seam inboard.Soft seal is by being provided with dovetail groove on sealing seam face, insert resistant to elevated temperatures " O " type silicon rubber loop 20 in dovetail groove and constituting.

Claims

1, a kind of valve that diffuses, comprise valve body, with the valve gap of valve body configuration be connected with valve gap and connecting rod valve gap opening/closing mechanism by Driven by Hydraulic Cylinder, it is characterized in that: the rear end of forming the pivoted arm (3) of connecting rod valve gap opening/closing mechanism is hinged with the top that is fixedly connected on the bearing (1) of valve body (11) one sides, the front end of pivoted arm (3) vertically is coated with guide rod (16), be equipped with attaching nut (12) successively in the upper end of guide rod (16), spring (13), spill bearing shell (14) that matches and convex bearing shell (15), the fixedly connected valve gap in the lower end of guide rod (10) also is provided with outer spherical surface watt seat (17) and the inner ball surface watt seat (18) that matches between valve gap and pivoted arm; Be equipped with the dwang (9) of a cavity type at the last hinging shaft of bearing (1) through placing the bearing inboard, in dwang (9), be provided with the pretension bar (5) of pocketed springs (8), the upper end of pretension bar is provided with pre-load nut (6), the below of pre-load nut and pretension bar are slidingly matched and are provided with slide plate (7), hinge is connected to connecting rod (4) at the middle part of pivoted arm (3), and the upper end of connecting rod (4) and slide plate (7) are hinged; Be installed in the outside of bearing (1) as the oil hydraulic cylinder (2) of the driveshaft gudgeon through placing the middle part, the lower end of the front end of hydraulic cylinder piston rod and dwang (9) is hinged.

2, the valve that diffuses according to claim 1 is characterized in that: valve gap (10) is provided with the hard sealing pair of sphere of pile-up welding hard alloy (19) formation and the soft seal pair that insert silicon rubber loop (20) constitutes with the sealing seam of valve body (11).