CN202140601U

CN202140601U - Novel ball valve

Info

Publication number: CN202140601U
Application number: CN201120212743U
Authority: CN
Inventors: 李水波
Original assignee: KUNSHAN XINLAI CLEAN APPLIED MATERIALS CO Ltd
Current assignee: KUNSHAN XINLAI CLEAN APPLIED MATERIALS CO Ltd
Priority date: 2011-06-22
Filing date: 2011-06-22
Publication date: 2012-02-08
Anticipated expiration: 2021-06-22

Abstract

The utility model discloses a novel ball valve, which comprises a valve body, a valve core, a left cover, a right cover and valve seats. The valve core is arranged inside the valve body. The left cover and the right cover are respectively connected with the left part and the right part of the valve body. The left cover and the right cover are respectively equipped with a medium inlet/outlet communicated with a flow channel inside the valve core. A valve seat is respectively arranged not only between the left cover and the valve core, but also between the right cover and the valve core. The novel ball valve is characterized in that each valve seat is equipped with a concave surface matched with the surface of the valve core and a plane matched respectively with the left cover and the right cover. Each valve seat is also equipped with a through medium passage and a plurality of through holes. The novel ball valve can effectively prevent the medium leakage.

Description

A kind of ball valve

Technical field

The utility model relates to a kind of valve, relates in particular to a kind of ball valve.

Background technique

Ball valve was come out the 1950's, along with the develop rapidly of science and technology, and the updating of production technology and product structure, in the 40 short years, having developed rapidly becomes a kind of main valve class.The flourishing country of industry in the west; The use of ball valve is constantly risen year by year; In China, ball valve is applied in industries such as petroleum refining, long-distance transport pipes, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, iron and steel widely, in national economy, occupies critical role.

China's notice of authorization number is CN2670696Y, and notice of authorization day is that the utility model patent on January 12nd, 2005 discloses a kind of ball valve, comprises valve body, spool, valve rod and handle; Spool is positioned at valve body, is provided with seal ring between valve rod and the valve body, and the inner of valve rod is connected with spool; Described valve body has a columnar positioning cylinder in the outer end of valve rod; The side of positioning cylinder is along the spacing hole that axially has a bar shaped perpendicular to valve rod, and spacing hole is passed in the end of handle, is connected with the outer end of valve rod; The ball-valve structure that adopts this model utility to provide; Though the valve rod of this kind ball valve can overstriking, the connecting end of handle and valve rod can adopt cylindrical shape, to improve its mechanical strength; Make the quality of product raising of ball valve prolong working life; But owing to this kind ball valve by should be with the time in volatile media or gas medium medium leak to along with the rotation of spool easily in the space that valve seat, spool and valve body surround, the medium when the temperature of external environment raises in the above-mentioned space is prone to expand along with the rising of temperature, to such an extent as to the increase of the pressure above-mentioned space in; Finally cause medium to be revealed, when medium is hazardous medium, just can be detrimental to health.

Summary of the invention

The utility model technical problem to be solved provides a kind of ball valve that can prevent effectively that medium from revealing.

For solving the problems of the technologies described above; The utility model provides a kind of ball valve; Comprise valve body, spool, left cap, right cap and valve seat; Said spool is loaded on that said valve body is inner, and said left cap is connected with right part with the left part of said valve body respectively with said right cap, offer respectively on said left cap and the said right cap with said spool in the medium import and export that communicate of runner; Be provided with valve seat between said left cap and said spool and said right cap and the said spool; Said valve seat has concave surface that adapts with said spool face and the plane that adapts with said left cap and right cap, offers the medium channel of perforation on the said valve seat, and said valve seat has also offered a plurality of through holes.

Said valve seat is a ring, and said a plurality of through holes are that the axle center circumferentially evenly is provided with at interval with the center of said valve seat.

Flow diameter in the diameter of said medium channel and the said spool is identical.

Compared with prior art, the beneficial effect of the utility model is:

1. because a kind of ball valve of the utility model offers a plurality of through holes on valve seat; Therefore when the rising and the expansion space internal pressure that receive ambient temperature of the medium in remaining in the space that spool, valve seat and valve body surround increases this residual medium can be through the medium import and export entering conveyance conduit of through hole on left cap and right cap in and can not reveal, so the utility model can effectively prevent the medium leakage.

Description of drawings

Fig. 1 is the ssembly drawing of the utility model,

Fig. 2 is the structural representation of valve rod shown in Figure 1.

Fig. 3 is the plan view of valve seat shown in Figure 1.

Fig. 4 is the longitudinal section of valve seat shown in Figure 1.

Among the figure: valve body 10, valve rod 12, spool 14, left cap 16, right cap 18, tenon 20, handle 22; Grip handle lock 24, medium imports and exports 26, runner 28, annular protrusion 30, annular groove 31, O shape circle 32; Tetrafluoro spacer 33, valve seat 34, through hole 36, seal ring 38, hexagonal tooth cap 40, pad 41.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is explained further details

Referring to a kind of ball valve shown in Figure 1, comprise valve body 10, valve rod 12, spool 14, left cap 16 and right cap 18, have vertical valve rod installation channel in the valve body 10; Spool 14 is loaded on the inside of valve body 10, and valve rod 12 is arranged in the valve rod installation channel, and an end of valve rod 12 is provided with tenon 20 (referring to shown in Figure 2); Spool 14 is provided with the groove that cooperates with tenon 20 shapes, and valve rod 12 cooperates with spool 14 shapes, for the other end of easy to operate valve rod 12 is equipped with handle 22; This handle 22 can be the axle center rotation by valve rod 12, and for preventing that misoperation is equipped with grip handle lock 24 on handle 22, left cap 16 is connected with right part with the left part of valve body 10 respectively with right cap 18 in addition; Offer medium on left cap 16 and the right cap 18 respectively and import and export 26, these medium import and export 26 communicate with spool 14 interior runners 28, and spool 14 can make the medium import and export 26 on left cap 16 and the right cap 18 be communicated with or partition in rotation under the drive of valve rod 12; Referring to Fig. 1, shown in Figure 2; Valve rod 12 upper edges circumferentially also are provided with an annular protrusion 30, in the use annular protrusion 30 effectively block media from the valve rod installation channel, reveal, make medium back flow; Further circumferentially offer annular groove 31 in annular protrusion 30 upper edges; Be set with O shape circle 32 in this annular groove 31, this O shape circle 32 can prevent further that medium from revealing from the valve rod installation channel, strengthen the sealing of valve rod installation channel; The longitudinal section of preferred O shape circle 32 is oval; This O shape circle 32 is compressed between valve body 10 and the valve rod 12, is set with Tetrafluoro spacer 33 in the bottom of annular protrusion 30, the sealing of the enhancing ball valve that this Tetrafluoro spacer 33 can be further.

Referring to Fig. 1, Fig. 3 and shown in Figure 4; Between left cap 16 and the spool 14; Be provided with valve seat 34 between right cap 18 and the spool 14; The plane that this valve seat 34 has the concave surface that adapts with spool 14 surfaces and adapts with left cap 16 and right cap 18 offers the medium channel of perforation on the valve seat 34, the interior Flow diameter of the diameter of this medium channel and spool is identical; Valve seat 34 is circular; On valve seat 34, be the axle center along circumferentially offering a plurality of through holes 36, when the medium of the ball valve of flowing through is gas or other volatile medias, have the portion gas medium usually and remain in the gap that spool 14, valve seat 34 and valve body 10 surround, when the temperature of external environment raises with valve seat 34 centers; The residual gas medium of this kind just can expand the pressure in this gap is increased; Thereby the situation that medium is revealed takes place, when this kind medium is hazardous medium, just can be detrimental to health, therefore can effectively make residual medium import and export 26 through through hole 36 through medium to get in the conveyance conduits and can not reveal offering through hole 36 on the valve seat 34.Between valve seat 34 and valve body 10, be provided with seal ring 38, the sealing of the enhancing ball valve that sealing circle 38 can be further.

Referring to shown in Figure 1; The diameter of valve rod 12 can make its upper end from the valve rod installation channel penetrate the valve rod installation channel and in the valve rod installation channel, rotating freely; The upper end-hole of valve rod installation channel be provided with one be sleeved on the valve rod and with the ring hexagonal tooth cap 40 of valve rod installation channel screw-thread fit; The end of

valve rod

12 and 14 spool connecting ends is provided with a tenon 20; Spool 14 is provided with the groove that cooperates with tenon shape, and it is that rotate in the axle center with valve rod 12 that the rotation of valve rod 12 can drive spool 14, thereby realizes the identical or partition of the medium import and export 26 on left cap 16 and the right cap 18; Can the upper end of valve rod 12 from the valve rod installation channel be penetrated the valve rod installation channel during assembling; Thereby assemble more conveniently, the upper end-hole of valve rod installation channel adopts fixedly valve rod 12 of the ring hexagonal tooth cap 40 that is sleeved on the valve rod 12, between the annular protrusion 30 on hexagonal tooth cap 40 and the valve rod 12, is provided with pad 41; Annular protrusion 30 can be effectively protected in the setting of this pad 41, can also play certain sealing effect simultaneously.

In sum, the utility model can effectively prevent the medium leakage.

The above is merely the preferred embodiments of the utility model; The protection domain of the utility model does not exceed with above-mentioned mode of execution; As long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection domain of putting down in writing in claims.

Claims

1. ball valve; Comprise valve body, spool, left cap, right cap and valve seat; It is inner that said spool is loaded on said valve body; Said left cap is connected with right part with the left part of said valve body respectively with said right cap; Offer respectively on said left cap and the said right cap with said spool in the medium that communicates of runner import and export, be provided with valve seat between said left cap and said spool and said right cap and the said spool, it is characterized in that: said valve seat has concave surface that adapts with said spool face and the plane that adapts with said left cap and right cap; Offer the medium channel of perforation on the said valve seat, said valve seat has also offered a plurality of through holes.

2. a kind of ball valve according to claim 1 is characterized in that: said valve seat is a ring, and said a plurality of through holes are that the axle center circumferentially evenly is provided with at interval with the center of said valve seat.

3. a kind of ball valve according to claim 1 and 2 is characterized in that: the Flow diameter in the diameter of said medium channel and the said spool is identical.