CN201202836Y

CN201202836Y - Ball valve

Info

Publication number: CN201202836Y
Application number: CNU2008201168090U
Authority: CN
Inventors: 郑旭锋; 郑利梅
Original assignee: Zhejiang Sanhua Co Ltd
Current assignee: Zhejiang Sanhua Refrigeration Group Co Ltd
Priority date: 2008-05-20
Filing date: 2008-05-20
Publication date: 2009-03-04
Anticipated expiration: 2018-05-20

Abstract

Disclosed is a ball valve which comprises a valve body (1), a valve base (2) connected on the valve body (1), a valve core ball (4) arranged in the valve body (1) and a valve rod (5) used for driving the valve core ball (4). The ball valve is characterized in that a seal plane (22) is formed on the external circular end part of the valve base (2) with orienting at the valve body (1); an annular inner step surface and an annular outer step surface (12/13) are formed on the end part of the valve body (1) with orienting at the valve base; a conical part (11) matched with the seal plane (22) of the valve base (2) is arranged on the inner step surface (12); the distance value (H1) which is from the top end of the conical part (11) to the inner step surface (12) is less than the distance value (H2) which is from the outer step surface (13) to the inner step surface (12). In the structure, because the top end of the conical part (11) used as the hard seal is sheltered by the outer step surface so that the impact damage is uneasy to occur during the part machining, the circulation and the post-treatment processes; the application reliability of the product is improved.

Description

A kind of ball valve

Technical field

The utility model relates to a kind of ball valve that refrigeration system is used that is used for, specifically sealing configuration between the valve seat of ball valve and the valve body.

Background technique

In refrigeration system, use in the more ball valve at present, sealing configuration is shown in Fig. 2 A, it comprises valve body 1b and the valve seat 2b that is connected on the valve body 1b, valve seat 2b is provided with step, valve body 1b is towards the end of valve seat 2b, be provided with the sealing inclined-plane 11b of flare, the valve seat of this kind ball valve is to be slided along the sealing inclined-plane 11b axially loaded of valve body by the step ora terminalis 21b on the valve seat to reach suitable distortion and seal firmly in the sealing means between the valve body.But this sealing means requires very high to the circularity on the sealing inclined-plane of valve body flare, and in fact because valve body adds the influence that is subjected to anchor clamps man-hour, the circularity on sealing inclined-plane, processing back alters a great deal, and its processing dimension is difficult to assurance, thereby directly has influence on the reliability of sealing.

In another public technology (utility model patent of publication number 200320109035.6), provided a kind of improved ball valve as shown in Figure 1, its sealing configuration is shown in Fig. 2 B, be provided with sealing plane 11a at valve body 1a towards the end of valve seat 2a, form the tapering 21a that cooperates with sealing plane 11a on the valve body 1a towards the end of valve body 1a at valve seat 2a, though this sealing configuration is as narrating in its patent specification, size and dimension to the sealing position requires lower, process also simple and convenient, but because the top of the tapering 21a of the hard potted line of conduct on the valve seat 2a directly exposes the outside at part, in part processing, be easy to generation in circulation and the subsequent processes and damage, thereby cause product to do over again or scrap.In addition, in product when assembling, added anaerobic adhesive at sealed department, and its anaerobic adhesive can play the airtight effect of short time, so if the valve seat that has tapering (potted line) to damage sneak into, when product export detects, also be difficult for finding product leakage, thereby cause existing the product stream of leaking hidden danger to market.

The model utility content

The technical assignment of the technical problems to be solved in the utility model and proposition is to overcome the defective that exists in the prior art, provides that a kind of processing and packaging technology are good, the reliable ball valve sealing structure of usability.For achieving the above object, the utility model discloses a kind of valve seat and valve seal structure of ball valve, and scheme is as follows:

A kind of ball valve, comprise valve body, be connected valve seat on the valve body, be arranged on the valve core ball in the valve body and drive the valve rod of described valve core ball, it is characterized in that, described valve seat is formed with sealing plane towards the outer rounded ends of valve body, described valve body is formed with ring-like inside and outside step surface towards the end of valve seat, described interior step surface is provided with the tapering of matching with the sealing plane of described valve seat.

Further, as preferred version, the distance value of interior step surface is arrived on the top in the tapering of described valve body less than described outer step surface to the distance value of interior step surface.

Further, as preferred version, also be provided with sealed member on the circular shaft face in the lumen orifice that is deep into described valve body of valve seat, described sealed member can be seal ring, is arranged in the groove on the circular shaft face of described valve seat.

Above-mentioned improved ball valve, the sealing configuration of its valve body and valve seat, owing in the end of valve body two step surfaces are arranged, on the step surface, the distance value of interior step surface was arrived on the top, tapering less than outer step surface to the distance value of interior step surface in the sealing tapering was arranged on.Like this, blocked by outer step surface, in part processing, circulation and subsequent processes, be easy to produce and damage as the top, tapering of hard potted line, avoided having the product stream of leaking hidden danger to market, the seal ring that is provided with between valve seat and valve body simultaneously can increase reliability of products.

Description of drawings

Fig. 1: the exemplary block diagram of the ball valve that refrigeration system is used;

Fig. 2 A/2B: two kinds of ball valve sealing structure figure of prior art;

Fig. 3: the preferred embodiment of the ball valve that the utility model provides;

Fig. 4: the local enlarged diagram among Fig. 3.

Symbol description among the figure

1-valve body, 2-valve seat, 3-sealed member, 4-spool ball, 5-valve rod, 6-bonnet, 7-fill core, 8-fills step surface in cap, 9-adapter, 10-sealing gasket, 11-tapering, the 12-, the outer step surface of 13-, 14-lumen orifice, 15-internal thread part, 100-inner chamber; 21-groove, 22-sealing plane, 23-circular shaft face, 24-periphery, 25-internal thread part.

Embodiment

Below in conjunction with exemplary embodiments, the technical solution of the utility model is described.

Fig. 3 is the preferred embodiment of the ball valve that provides of the utility model.Referring to Fig. 3, the agent structure of ball valve is a valve body 1, in valve body 1, be provided with the spool ball 4 of a spheroidal, one end of valve body 1 is equipped with valve seat 2, valve seat 2 cooperates with valve body 1 by being threaded, between spool ball 4 and valve body 1 and valve seat 2, be respectively arranged with sealing gasket 10, opening and closed state lower valve chamber 100 airtight to guarantee ball valve, valve body 1 and valve seat 2 airtight respectively being connected with of direction of spool ball 4 dorsad take over 9, inlet passage and outlet passage as ball valve, spool ball 4 communicates with the external world by valve rod 5, the upper end that is spool ball 4 offers slot (figure does not mark), the shape that is complementary with above-mentioned slot is processed in the lower end of valve rod 5, spool ball 4 can come the closure or openness ball valve by rotation valve rod 5 after assembling with valve rod 5, on valve body 1, also be provided with and fill core 7, can in refrigeration system, add refrigeration agent (ball valve that has should not fill structure) by this filled core 7.

Fig. 4 is the local enlarged diagram of Fig. 3.Referring to Fig. 4, valve seat 2 is parts (see figure 1)s of a similar circular ring, on inwall, be welded with and take over 9, end towards valve body 1 has a circular shaft face 23, on circular shaft face 23, be processed with groove 21, also have one section external thread part 25 simultaneously on circular shaft face 23, form a step surface between the periphery 24 of valve seat 2 and the circular shaft face 23, this step surface is as the sealing surface 22 of valve seat 2; Valve body 1 is similar circular ring (see figure 1) towards the end of valve seat 2, and is formed with ring-like interior step surface 12 and outer step surface 13, is processed with tapering 11 on interior step surface 12, on the wall of the lumen orifice 14 of annulus one section internal thread part 15 is arranged.

When valve body 1 is assembled with valve seat 2, at first put into the seal ring 3 that is fit to size at the groove 21 of valve seat 2, connect by internal and external threads portion (15/25) again, the circular shaft face 23 of valve seat 2 is screwed in the lumen orifice 14 of valve body 1, the top butt in the tapering 11 on step surface 12 in the sealing surface 22 of valve seat 2 and the valve body 1 also makes the suitable distortion of its generation, thereby reaches hard seal action.

As shown in Figure 4, the distance value of interior step surface 12 is arrived on top, the tapering of valve body 1 (11) less than outer step surface 13 to the distance value H1 of interior step surface 12, be H1＜H2, top, tapering (11) as the valve body 1 of hard sealing is blocked by outer step surface, in part processing, circulation and subsequent processes, be not easy to produce and damage, avoided having the product stream of leaking hidden danger to market, the seal ring that is provided with between valve seat and valve body simultaneously can increase reliability of products.

Below only be for setting forth the technical solution of the utility model; the preferred implementation that is exemplified; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1, a kind of ball valve, comprise valve body (1), be connected valve seat (2) on the valve body (1), be arranged on the valve core ball (4) in the valve body (1) and the valve rod (5) of the described valve core ball of driving (4), it is characterized in that, described valve seat (2) is formed with sealing plane (22) towards the outer rounded ends of valve body (1), described valve body (1) is formed with ring-like inside and outside step surface (12/13) towards the end of valve seat, described interior step surface (12) is provided with the tapering (11) of matching with the sealing plane (22) of described valve seat (2).

2, ball valve as claimed in claim 1 is characterized in that, the distance value (H2) of interior step surface (12) is arrived on the top in the tapering (11) of described valve body (1) less than described outer step surface (13) to the distance value (H1) of interior step surface (12).

3, ball valve as claimed in claim 1 or 2 is characterized in that, also is provided with sealed member (3) on the circular shaft face (23) in the lumen orifice that is deep into described valve body (1) (14) of valve seat (2).

4, ball valve as claimed in claim 3 is characterized in that, described sealed member (3) is specially seal ring, is arranged in the groove (21) on the circular shaft face (23) of described valve seat (2).