CN2784686Y

CN2784686Y - Soft and hard sealing combined valve for ash, slag and mortar

Info

Publication number: CN2784686Y
Application number: CN 200420054337
Authority: CN
Inventors: 穆金华; 池正川; 顾才利; 傀忠迁
Original assignee: KVC VALVE GROUP CO Ltd
Current assignee: KVC VALVE GROUP CO Ltd
Priority date: 2004-12-10
Filing date: 2004-12-10
Publication date: 2006-05-31
Anticipated expiration: 2014-12-10

Abstract

The utility model relates to a valve, particularly to an ash and mortar valve combining soft sealing with hard sealing. The utility model is characterized in that the sealing device comprises a hard sealing member arranged on a front sealing face in contact with media and an air bag sealing member on a back sealing face; the air bag sealing member and the hard sealing member respectively form soft sealing matching and hard sealing matching with a valve core. The utility model makes use of the combination of the air bag deformation sealing and the hard sealing and adopts a sealing method that the hard sealing is before a medium impact surface and the air bag deformation sealing is behind the medium impact surface, which protects the air bag sealing surface and reduces the abrasion of the air bag sealing surface. After long-time use, even if the hard sealing has tiny leakage, the continuous sealing of the air bag sealing member ensures the sealing effect. In addition, the utility model makes use of the corresponding forward and backward slide of the hard sealing member when a pneumatic control valve is opened and closed to avoid the abrasion which is caused by friction to the hard sealing member when the valve is opened and closed and prolong the service life of the product.

Description

The lime-ash Mortar valve that soft and hard seal combines

Technical field

The utility model relates to a kind of valve, the lime-ash Mortar valve that particularly a kind of soft and hard seal combines.

Background technique

The domestic and international market is in great demand to being applicable to the valve that has granule medium, the main valve that adopts in these pipelines at present, itself otherwise adopt the soft seal mode, or adopt hard sealing means, and soft seal valve seal quick abrasion, working life is very short; And hard sealed valve seal leakage amount is big, can not guarantee sealability.

Summary of the invention

The purpose of this utility model is to solve above-mentioned deficiency, and a kind of lime-ash Mortar valve that both can guarantee that high sealing performance can have the soft and hard seal in high working life to combine is provided.

The purpose of this utility model is achieved by the following technical solution: the lime-ash Mortar valve that a kind of soft and hard seal combines, comprise valve body, valve shaft, the spool that is connected with valve linkage shaft and be located at spool and valve body between seal arrangement, described seal arrangement comprises the air sac sealing spare on the hard Sealing that is located on the preceding sealing surface that contacts with medium and the back sealing surface, and that air sac sealing spare and hard Sealing and spool constitute respectively is soft, be sealed and matched firmly.

Of the present utility modelly further be set to: described valve body is provided with chute and two pores, and the one pore communicates with air sac sealing spare, and another pore communicates with the chute bottom, and hard Sealing forms along sealing with chute and cooperated by the vent plug of force direction.

The utility model further is set to again: the two ends of described air sac sealing spare are fixed on the valve body with trim ring, and wherein a trim ring is fixed in the chute, and hard Sealing becomes the shoulder rank to be slidingly matched with this trim ring.

The utility model further is set to again: be provided with contraction spring in the described air sac sealing spare, be provided with the Returnning spring that hard Sealing is resetted between described hard Sealing and the trim ring.

The beneficial effects of the utility model are: utilize air bag deformable seal and hard sealing to combine and be sealed in firmly air bag deformable seal before the medium shock surface after sealing means; protected the air sac sealing face; reduce the wearing and tearing of air sac sealing face; even after long-term the use; be sealed with minor leakage firmly; but lasting sealing by air sac sealing spare; guaranteed the effect of sealing; in addition; when utilizing the pneumatic control valve folding hard Sealing corresponding before; slide in the back; when more having protected the valve folding to the wearing and tearing that friction caused of hard Sealing, the working life of having improved product.

Description of drawings

Fig. 1 is the utility model embodiment's a structural representation

Fig. 2 is the local enlarged diagram in C place of Fig. 1

Embodiment

Below in conjunction with accompanying drawing the utility model is further described:

As Fig. 1, shown in Figure 2, the lime-ash Mortar valve embodiment that the utility model soft and hard seal combines comprises valve body 1, valve shaft 3, and the spool 2 that valve shaft 4 is connected and be located at spool 3 and valve body 1 between seal arrangement, described seal arrangement comprise the hard Sealing 8 that is located on the preceding sealing surface that contacts with medium and with the back sealing surface on air sac sealing spare 7, air sac sealing spare 7 and hard Sealing 8 constitute soft respectively with spool 2, be sealed and matched firmly, described valve body 1 is provided with chute 10 and two

pores

61,62, one pore 61 communicates with air sac sealing spare 7, another pore 62 communicates with chute 10 bottoms, hard Sealing 8 forms along sealing with chute 10 and cooperated by the vent plug of force direction, certainly hard Sealing 8 also can not adopt vent plug to cooperate with chute 10, utilization is established spring and is made the tight obedient valve core sealed cover of hard Sealing between hard Sealing and chute, thereby but can make spool and hard Sealing produce friction like this when the folding valve can make hard Sealing enhance faster wear; The two ends of described air sac sealing spare 7 are fixed on the valve body 1 with trim ring, wherein a trim ring 12 screw threads are fixed in the

chute

10,12 one-tenth shoulders of hard Sealing 8 and trim ring rank are slidingly matched, and trim ring 12 also can not be located in the chute 10 certainly, but the inconvenience that can cause processing like this and install; Be provided with contraction spring in the described air sac sealing spare 7, be provided with the Returnning spring 11 that hard Sealing 8 is resetted between described hard Sealing 8 and the trim ring 12, the setting of described contraction spring and Returnning spring 11 be for when opening valve, make air sac sealing spare 7 and hard Sealing 8 reset faster (the resetting of hard Sealing 8 be meant be subjected to hard Sealing 8 under Returnning spring 11 effects to spool 2 oppositely but chute 10 bottom direction slide back), so, if do not establish contraction spring and Returnning spring also is feasible, to lean on the pressure of medium to finish but reset, thereby cause the wearing and tearing of Sealing easily.

During the utility model embodiment's using process: during throttle down, utilize outside control gear rapidly to pore 62 that hard Sealing 8 is connected in inflate, hard Sealing 8 is adjacent to spool 2 directions under the promotion of air pressure, then, control gear turns to air inlet in the pore 61 that is connected with air bag Sealing 7 again, gas makes air sac sealing spare 7 expand rapidly, thereby be adjacent to spool 2 sealing surfaces, guaranteed soft seal, like this, the sealing of earlier hard sealing rear gasbag had both made ought be sealed with a little leakage firmly and also can guarantee sealability by air sac sealing, had guaranteed that also air sac sealing spare 7 is not subjected to the impact of granule medium; When throttle down, pore 61 venting that control gear connects air sac sealing spare 7, the rapid retraction of the effect of air sac sealing spare 7 spring within it, pore 62 venting that then are connected with hard Sealing 8, hard Sealing 8 contracts after under Returnning spring 11 effects and resets, thereby realize soon support and receive soon, medium can't wash away sealing surface, raising product working life.

In above-mentioned, also can realize above-mentioned function with the oily place of gas medium that is used as power.

Claims

1. lime-ash Mortar valve that soft and hard seal combines, comprise valve body, valve shaft, the spool that is connected with valve linkage shaft and be located at spool and valve body between seal arrangement, it is characterized in that: described seal arrangement comprises the air sac sealing spare (7) on the hard Sealing (8) that is located on the preceding sealing surface that contacts with medium and the back sealing surface, and that air sac sealing spare (7) and hard Sealing (8) and spool (2) constitute respectively is soft, be sealed and matched firmly.

2. the lime-ash Mortar valve that soft and hard seal according to claim 1 combines, it is characterized in that: described valve body (1) is provided with chute (10) and two pores (61), (62), one pore (61) communicates with air sac sealing spare (7), another pore (62) communicates with chute (10) bottom, and hard Sealing (8) forms along sealing with chute (10) and cooperated by the vent plug of force direction.

3. the lime-ash Mortar valve that soft and hard seal according to claim 1 and 2 combines, it is characterized in that: the two ends of described air sac sealing spare (7) are fixed on the valve body (1) with trim ring, wherein a trim ring (12) is fixed in the chute (10), and hard Sealing (7) becomes the shoulder rank to be slidingly matched with this trim ring (12).

4. the lime-ash Mortar valve that soft and hard seal according to claim 3 combines, it is characterized in that: described air sac sealing spare is provided with contraction spring in (7), is provided with the Returnning spring (11) that hard Sealing (8) is resetted between described hard Sealing (8) and the trim ring (12).