CN201028025Y

CN201028025Y - Oscillating ceramic abrasion-proof valve

Info

Publication number: CN201028025Y
Application number: CNU2007200894349U
Authority: CN
Inventors: 马俊峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-02-09
Filing date: 2007-02-09
Publication date: 2008-02-27
Anticipated expiration: 2017-02-09

Abstract

A swing type ceramic anti-wear valve comprises a valve body (1), a gate (3) which is arranged in a channel of the valve body, and a seal ring (6) which is arranged at the channel port of the valve body and fitted with the seal surface of the gate. The utility model is characterized in that the gate (3) is arranged in the valve body through a crank and connecting rod mechanism which can drive a relative valve channel to swing transversely; the seal surface of the gate which is fitted with the seal ring (6) made of ceramic material is embedded with a ceramic seal plate (5), and the diameter of the ceramic seal plate (5) is larger than the diameter of the seal ring (6). As an opening moving mode of the valve adopts a swing structure, and the structure of rotation axis type is easier to achieve sealing than a piston type axial motion adopted by the prior art, and dust is prevented from entering into a valve packing while working, the occurrence that the valve is not at proper position or blocked when closed or opened; the valve can be more easily opened under the same dynamic condition by adopting the crank and connecting rod mechanism; the anti-wear service life of the valve can be prolonged by adopting engineering ceramic materials as seal pair.

Description

Oscillating type ceramic wear resistant valve

Technical field

The utility model relates to a kind of valve, particularly a kind of oscillating type ceramic wear resistant valve that is used for thermal power plant pulverized fuel ash or other dried powder material malleation air-transport system.

Background technique

The malleation air-transport system is adopted in the conveying of thermal power plant pulverized fuel ash (or other dried powder material) more, uses the valve at this malleation air-transport system that various ways is arranged, and is the gate valve of double-flashboard form but use maximum.This gate valve has the flashboard of pair of parallel configuration, between the two shoe brake plates spring is housed, elastic force makes every shoe brake plate and valve seat tightly stick together the sealing pair that forms valve, cylinder links together by link and flashboard, connect the inside and outside gas lever (being equivalent to valve rod) of valve and adopt flexible packing_seal, drive flashboard when cylinder is done piston motion and on the cavity sealing surface, make linear slide, make valve open and close.But owing to media hardness height, the flow velocity of conveying are fast, mobile poor, so use very fast of valve seal surface wear in system like this, the dust that deposits in the cavity when the valve level is installed also can make the valve pass hold not in place, even the piston rod that dust frequently moved occurs and be entrained to the phenomenon that makes valve stuck within the packing, bring many troubles for the normal operation and the maintenance work of system.In order to solve an above-mentioned difficult problem, though numerous producers of valve design manufacturing have taked many measures: adopt superhard materials such as engineering ceramics, coal, cemented carbide to make the sealing surface of valve, the valve cavity is purged etc., but all can not solve simultaneously well valve wearing and tearing, close and open not in place even stuck phenomenon.

Summary of the invention

The purpose of this utility model provide at existing deficiency in the above-mentioned prior art just a kind of wear-resisting property good, close reliable oscillating type ceramic wear resistant valve.

The purpose of this utility model can realize by following technical proposals:

Oscillating type ceramic wear resistant valve of the present utility model comprises valve body, be arranged on the flashboard in the valve flowing channel, and the seal ring that matches with the flashboard sealing surface that is installed in valve flowing channel mouth place, wherein: described flashboard is installed in the valve body by the connecting rod that can drive its relative valve flowing channel and do teeter; Be embedded with ceramic seal plate on the flashboard sealing surface that matches of the seal ring that adopts ceramic material to form, and the diameter of ceramic seal plate is more than or equal to the diameter of seal ring.

Flashboard described in the utility model is the double-flashboard structure, is installed in the connecting rod two ends that are positioned at connecting rod end, and the sealing surface of two flashboards matches with the seal ring that is installed in into and out of runner mouth inboard respectively.

Flashboard described in the utility model also can be designed to the Single disc structure according to actual needs, and described flashboard is installed in the connecting rod end that is positioned at connecting rod end, and the sealing surface of flashboard matches with the seal ring that is installed in the runner exit inboard.

Better for the sealing effect that makes flashboard, the connecting rod that the utility model will be positioned at connecting rod end is designed to the mesopore columniation structure, is provided with pressure spring in the cavity therein, is in the compressed fit state between the end of this pressure spring and flashboard.

The utility model has following beneficial effect compared to existing technology:

A, owing to adopt engineering ceramic material as sealing pair (the ceramic seal face of flashboard and ceramic-seal ring constitute the sealing pair of valve jointly), make that the wear-resistant life-span of valve is prolonged;

B, because the opening movement mode of valve adopts swing structure, and during valve working, flashboard is being swung on the plane at valve seal under the drive of crank-connecting rod, thereby realize valve open and close; The easier realization sealing of the piston type axial motion that its rotation axis structure is adopted in compared to existing technology, dust can not enter in the valve packing during work, closes, holds not in place and stuck phenomenon so valve can not occur; Adopt connecting rod, be equivalent to adopt lever principle, valve is easier unlatching under identical dynamic condition;

C, according to different service conditions and mounting type, can adopt two kinds of structural types of Single disc or double-flashboard, install or single face when stressed in the valve level, adopt the form of Single disc, the dust stratification that can reduce effectively in the cavity closes the influence of opening to valve.

Description of drawings

Fig. 1 cuts open figure for the master of double-flashboard structure.

Fig. 2 cuts open figure for the master of Single disc structure.

Among the figure: 1-valve body, 2-valve seat, 3-flashboard, 4-pressure spring, 5-ceramic seal plate, 6-seal ring, 7-connecting rod, 8-rotating shaft, 9-crank.

Embodiment

The utility model is further described below with reference to embodiment's (accompanying drawing):

Embodiment 1

As shown in Figure 1, oscillating type ceramic wear resistant valve of the present utility model comprises valve body 1, be arranged on the flashboard 3 in the valve flowing channel, and the seal ring 6 that matches with the flashboard sealing surface that is installed in valve flowing channel mouth place, described flashboard 3 is the double-flashboard structure, be installed in the connecting rod two ends that are positioned at connecting rod 7 ends, the sealing surface of two flashboards matches with the seal ring 6 that is installed in into and out of runner mouth inboard respectively; The connecting rod that is positioned at connecting rod 7 ends is the mesopore columniation structure, is provided with pressure spring 4 therein in the cavity, and 3 on the end of this pressure spring 4 and flashboard are in the compressed fit state, and flashboard 3 is tightly fit together with valve seat 2 and seal ring 6 under the effect of spring 4; Be embedded with ceramic seal plate 5 on the flashboard sealing surface that matches of the seal ring 6 that adopts ceramic material to form, and the diameter of ceramic seal plate 5 is more than or equal to the diameter of seal ring 6; Described connecting rod 7 combines with rotating shaft 8 the inners on being installed in valve body by the key ways of connecting, and the crank 9 that is used to drive rotating shaft 8 rotations combines with rotating shaft 8 outer ends by the key ways of connecting.

Embodiment 2

As shown in Figure 2, this embodiment and embodiment's 1 difference is: described flashboard 3 is the Single disc structure, is installed in the connecting rod end that is positioned at connecting rod 7 ends, and the sealing surface of flashboard 3 matches with the seal ring 6 that is installed in the runner exit inboard.

Claims

1. oscillating type ceramic wear resistant valve, it comprises valve body (1), be arranged on the flashboard (3) in the valve flowing channel, and the seal ring (6) that matches with the flashboard sealing surface that is installed in valve flowing channel mouth place, it is characterized in that: described flashboard (3) is installed in the valve body by the connecting rod that can drive its relative valve flowing channel and do teeter; Be embedded with ceramic seal plate (5) on the flashboard sealing surface that matches of the seal ring (6) that adopts ceramic material to form, and the diameter of ceramic seal plate (5) is more than or equal to the diameter of seal ring (6).

2. oscillating type ceramic wear resistant valve according to claim 1, it is characterized in that: described flashboard (3) is the double-flashboard structure, be installed in the connecting rod two ends that are positioned at connecting rod (7) end, the sealing surface of two flashboards (3) matches with the seal ring (6) that is installed in into and out of runner mouth inboard respectively.

3. oscillating type ceramic wear resistant valve according to claim 1, it is characterized in that: described flashboard (3) is the Single disc structure, be installed in the connecting rod end that is positioned at connecting rod (7) end, the sealing surface of flashboard (3) matches with the seal ring that is installed in the runner exit inboard (6).

4. according to claim 2 or 3 described oscillating type ceramic wear resistant valves, it is characterized in that: being positioned at the terminal connecting rod of connecting rod (7) is the mesopore columniation structure, be provided with pressure spring (4) therein in the cavity, be in the compressed fit state between end of this pressure spring (4) and flashboard (3).