CN2240651Y

CN2240651Y - Ceramic sealing valve

Info

Publication number: CN2240651Y
Application number: CN 95228258
Authority: CN
Inventors: 张锡水
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-08
Filing date: 1995-12-08
Publication date: 1996-11-20
Anticipated expiration: 2005-12-08

Abstract

The utility model relates to a valve which comprises a valve body. A water inlet and a water outlet channels are arranged in the valve body; a valve rod is connected with a handle outside the valve body; a ceramic valve seat which is contacted with the end face of a valve core at the lower end of the valve rod is arranged in the valve body. When the handle rotates, a water flow channel on the ceramic valve seat and a water flow channel on the ceramic valve core can be in a state with an aligned position or a staggered position, so that the water inlet and the water outlet channels are switched on or off. The utility model which has the advantages of simple structure and reliable sealing performance can be widely used in industrial and civil occasions, such as a stop valve, a throttling valve, a water tap, etc.

Description

The new ceramics sealed valve

The utility model relates to that a kind of to open and close motion mainly be the valve that rotatablely moves.

Existing stop valve, valves such as throttle valve or water tap all are the spiral lift structures, the unlatching of valve port and Flow-rate adjustment are that the change by spool and valve base chamber gap realizes, mainly fit tightly realization when closing by the spool at inlet place and valve seat, the leakage of spool periphery seals by compressing of filler during unlatching, mainly there is following defective in this structure: 1. spool and valve seat are if adopt hard material, as bronze, stainless steel, cemented carbide etc., suspended matter in the convection cell is relatively more responsive, because solid particle accumulates in spool and valve base chamber, not only hinder its closure, and can make both contact surface abrasion, therefore cause when closing poorly sealedly, produce leakage phenomenon; 2. soft pad is set when spool and valve base chamber, during as rubber, plastics,, it is followed the string even destroys and cause leakage because the frequent operation of opening and closing constantly compresses and loosen the erosion of fluid when causing fatigue ruption and unlatching; 3. owing to open and close operation relative movement is always arranged between spool and filler, must cause wearing and tearing, at pressure higher or under when connecing other automatic-closing valve, bear herein that pressure is limited will to cause leakage, it is to splashing, also should not avoid leaking this moment by the method that compresses filler, is very difficult because filler compresses the appropriate regulation of degree.

The purpose of this utility model is to design a kind of simple in structure and can effectively stop leakage phenomenon, the ceramic seal valve of long service life.

The purpose of this utility model is achieved through the following technical solutions: the ceramic seal valve, it comprises valve body, offer intake tunnel, exhalant canal in it, valve rod extends the valve body outside by valve inner and links to each other with handgrip, its specialization is: be provided with ceramic valve seat in the valve body, the valve rod lower end is provided with ceramic valve core, and spool contacts with the valve seat end face, when ceramic valve core with handgrip. when valve rod rotates; On the described ceramic valve seat on set flow channel and the ceramic valve core set flow channel can be in and aim at or the staggered positions state, be communicated with thus or by intake tunnel, exhalant canal.

Compared with prior art, the utility model is simple in structure, and highly versatile can be selected valve body material according to different fluid, and the critical component ceramic valve core, valve seat and the secondary seal that are used to open and close can make and improve tens of times even hundreds of times its working life; Adopt the rotation of fitting of ceramic valve core, valve seat to realize the technology that opens and closes, still keep excellent sealing ability containing to use under the fluid occasion of solid particle, therefore stopped leakage phenomenon effectively.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the structural representation of ceramic valve seat;

Fig. 4 is the plan view of Fig. 3;

Fig. 5 is the worm's eye view of Fig. 3;

Fig. 6 is the structural representation of ceramic valve core;

Fig. 7 is the plan view of Fig. 6;

Fig. 8 is the worm's eye view of Fig. 6.

Below in conjunction with drawings and Examples the utility model is further described.

Embodiment

At Fig. 1, among Fig. 2, valve comprises valve body (10), offer intake tunnel (11) in it, exhalant canal (12), valve rod (20) extends valve body (10) outside by valve body (10) inside and links to each other with handgrip (21), be provided with ceramic valve seat (30) in the valve body (10), valve rod (20) lower end is provided with ceramic valve core (40), valve seat (30) and spool (40) both keep end face to contact, when ceramic valve core (40) with handgrip (21). when valve rod (20) rotates, the flow channel (31) that described ceramic valve seat (30) upward is provided with can be in the flow channel (41) that ceramic valve core (40) upward is provided with to be aimed at or the staggered positions state, is communicated with or ends intake tunnel (11) thus, exhalant canal (12).

At Fig. 3,4, in 5 as seen, ceramic valve seat (30) is like a garden platform shape, be forked to the upper-end surface by an opening from bottom to top in it and form two path water circulation road (31), be provided with Sealing (50) between valve seat (30) lower end surface and the valve body (10), with reference to figure 1, and limit relatively rotating between valve seat (30) and Sealing (50) and the housing (10) by set locating stud (51), Fig. 4, aperture among Fig. 5 (32) cooperates with locating stud (51) just and is provided with, can guarantee that like this valve seat (30) does not cause rotating with top spool (40) friction when opening and closing, the while is guaranteed the intact applying of sealing plane better.The special construction of above-described ceramic valve seat (30), the water flow in the time of can guaranteeing maximum the unlatching equates with flow of inlet water.

In Fig. 6, Fig. 7, Fig. 8, the upper-end surface of spool (40) has in-line groove (42), the lower end of it and valve rod (20) matches, referring to Fig. 1, but and transmitting torque, the bottom of spool (40) has the depression position of two symmetric arrangement to form flow channel (41), and the from inside to outside smooth from bottom to top arcuation of flow channel (41) is arranged and the flow channel (31) of the valve seat (30) of fitting with its below cooperates the flow channel that constitutes smoothness, and this structure can reduce fluid resistance and impact shock.

In Fig. 1, there is ceramic plate (60) spool (40) upper-end surface, the ceramic plate of both joint places (60) is provided with deposits fat groove (61), valve seat (30) upper-end surface is provided with small rut (33), this structural design is beneficial in ceramic fitting faying surface place formation liquid film, the flexibility that fluid-tight performance in the time of can guaranteeing to close and keying are rotated.Gap between each ceramic component applying end face is regulated by hold-down ring (70) in ceramic plate (60) upper-end surface, hold-down ring (70) and valve body (10) screw-thread fit also overlay to ceramic plate (60), by Sealing (71) realization end face seal between the two, hold-down ring (70) top is provided with capping (80) between ceramic plate (60) and the hold-down ring (70).

In conjunction with Fig. 1, Fig. 6, Fig. 7, Fig. 8, valve body (10) is provided with pin (90), hold the joint place that extends spool (40) and ceramic plate (60) before the pin (90) level with both hands and ceramic plate (60) is fixed and can't be rotated, pin (90) inserts spool (40) simultaneously and goes up in the set groove (43), this groove (43) is to offer one section radian along the last end periphery of spool (40), pin (90) limits within the specific limits with the rotation of groove (43) engagement limits spool (40), and guarantee that it rotates pi/2, makes valve can be in conducting or cut-off state respectively.

In the utility model, all motive sealing occasions, it is the faying surface between ceramic plate (60) and the spool (40), faying surface is ceramic accurate polishing face between spool (40) and the valve seat (30), and between faying surface, make be beneficial to lubricated and sealing deposit fat groove and small rut, sealability can be improved like this, also the keying driving torque can be reduced.

Claims

1. new ceramics sealed valve, it comprises valve body (10), offer intake tunnel (11) in it, exhalant canal (12), valve rod (20) extends valve body (10) outside by valve body (10) inside and links to each other with handgrip (21), it is characterized in that: valve body (10) inside is provided with ceramic valve seat (30), valve rod (20) lower end is provided with ceramic valve core (40), spool (40) contacts with both end faces of valve seat (30), when ceramic valve core (40) with handgrip (21), when valve rod (20) rotates, the last set flow channel (31) of described ceramic valve seat (30) can be in the last set flow channel (41) of ceramic valve core (40) to be aimed at or the staggered positions state, is communicated with or ends intake tunnel (11) thus, exhalant canal (12).

2. ceramic seal valve according to claim 1, it is characterized in that: ceramic valve seat (30) is like a garden platform shape, be forked to the upper-end surface by an opening from bottom to top in it and form two path water circulation road (31), be provided with Sealing (50) between valve seat (30) lower end surface and the valve body (10), and limit relatively rotating between valve seat (30) and Sealing (50) and the housing (10) by set locating stud (51).

3. ceramic seal valve according to claim 1 and 2, it is characterized in that: spool (40) upper-end surface have in-line groove (42) and valve rod (20) but the lower end transmitting torque that coincide, the depressed part that is provided with two arcuations on the spool (40) from bottom to top forms flow channel (41), and it constitutes the flow channel of smoothness with the flow channel (31) on the valve seat (30).

4. ceramic seal valve according to claim 3, it is characterized in that: described spool (40) upper-end surface is provided with ceramic plate (60), be provided with the groove (61) of depositing fat and using with the ceramic plate (60) of spool (40) applying one side, valve seat (30) is provided with some small ruts (33) with the upper-end surface that spool (40) is fitted, hold-down ring (70) and valve body (10) screw-thread fit also overlay to above-mentioned ceramic plate (60), be provided with Sealing (71) between the two and realize end face seal, hold-down ring (70) top is provided with the capping (80) that links to each other with valve body (10).

5. ceramic seal valve according to claim 4, it is characterized in that: valve body (10) is provided with pin (90), hold level with both hands before the pin (90) and extend spool (40) with the joint place of ceramic plate (60) and with ceramic plate (60) fixed position, pin (90) inserts spool (40) simultaneously and goes up in the groove (43) that is provided with, and this groove (43) is offered along the last end periphery of spool (40).