CN207394003U

CN207394003U - Leakproof spherical valve

Info

Publication number: CN207394003U
Application number: CN201721400709.6U
Authority: CN
Inventors: 余鸣亮
Original assignee: Zhejiang United State University Of Forging And Pressing Co Ltd
Current assignee: Zhejiang United State University Of Forging And Pressing Co Ltd
Priority date: 2017-10-27
Filing date: 2017-10-27
Publication date: 2018-05-22
Anticipated expiration: 2027-10-27

Abstract

The utility model discloses a kind of Leakproof spherical valves,Including left valve seat,Right valve seat and faucet body,Left valve seat and right valve seat are sealingly mounted at the both ends of a connecting tube respectively,Faucet body is driven by valve rod,The middle waist position of connecting tube is equipped with the mounting hole passed through for valve rod,Stuffing box is bolted in mounting hole,Stuffing box has axis hole,The rotatable valve rod of insertion in axis hole,Axis hole one end is bolted with sealing cover,The endoporus arm of sealing cover is equipped with and the corresponding isolation ring of valve rod,The annular seal space of annular is equipped in axis hole,The rear and front end of annular seal space is equipped with the rubber ring of annular,The graphite lantern ring of annular is equipped between rubber ring,Rubber ring inner hole wall is equipped with the ceramic ring of annular,The subring of annular is equipped on graphite lantern ring inner hole wall,There is the through hole that section is prismatic on faucet body,The symmetrical angle of two couple on through-hole wall is set in direction in length and breadth.So just realize good seal performance, structure robust techniques effect.

Description

Leakproof spherical valve

Technical field

The utility model is related to a kind of Leakproof spherical valves.

Background technology

There is in ball valve stuffing box, installed in stuffing box after grafting valve rod with valve base sealing, and between stuffing box and valve rod There is also the structure of sealing, so as to protect valve rod in rotary motion will not discharging liquid, due to the valve rod on ball valve infrequently Use, may cause that corrosion can be generated between valve rod and stuffing box, the gap between valve rod and stuffing box is had an impact and The rotation of valve rod can be had an impact, and when ball valve is used in some high pressures or the liquid medium process of circulation of high temperature, pole The leakage of liquid can easily be caused or even cause security incident.

The content of the invention

To solve the above problems, the purpose of this utility model is to provide a kind of structure is reliable and good seal performance it is anti- Leak ball valve.

To achieve the above object, the utility model provides following technical solution：A kind of Leakproof spherical valve, including left valve Seat, right valve seat and faucet body, left valve seat and right valve seat are sealingly mounted at the both ends of a connecting tube respectively, and faucet body is driven by valve rod Dynamic, the middle waist position of the connecting tube is equipped with the mounting hole passed through for valve rod, and stuffing box, institute are bolted in the mounting hole Stuffing box is stated with axis hole, the interior insertion of the axis hole is rotatably bolted with sealing cover in the valve rod, described axis hole one end, The endoporus arm of the sealing cover be equipped with the corresponding isolation ring of the valve rod, the isolation ring be graphite material, The annular seal space of annular is equipped in the axis hole, the rear and front end of the annular seal space is equipped with the rubber ring of annular, in the rubber The graphite lantern ring of annular is equipped between rubber ring, the rubber ring inner hole wall is equipped with the ceramic ring of annular, in the graphite cannula Ring inner hole wall is equipped with the subring of annular, and the subring is powder metallurgy material, has section on the faucet body For the through hole of prismatic, the symmetrical angle of two couple on the through-hole wall is set in direction in length and breadth.

Locating ring is equipped between the end face of the left valve seat and the right valve seat, the locating ring is equipped with and the valve Bar corresponding rotation hole is convexly equipped with the moving block to match with the rotation hole on the faucet body, the moving block upper surface Equipped with square turn slot, the valve stem end is plugged in the turn slot.

This structure of the utility model, the faucet body on ball valve in rotary course, the through hole of prismatic with left and right valve Seat endoporus is when communicating, and is more prone to adjusting control fluid flow, and the annular seal space of stuffing box can be improved close by the rubber ring at both ends The sealing performance of chamber is sealed, the ceramic ring on rubber ring inner hole wall can be contacted with valve rod external wall friction, can protect rubber ring, raising The service life of rubber ring, and graphite lantern ring can further improve sealing performance, and during the CONTACT WITH FRICTION with valve rod Structure is more solid and reliable, and the subring of powder metallurgy material can generate when with valve stem contacts on graphite lantern ring inner hole wall Lubricating oil reduces the rotation friction of valve rod, and valve rod is made to keep the smoothness rotated for a long time, so just realizes sealing performance Good, structure robust techniques effect.

The utility model is further described with reference to the accompanying drawings and detailed description.

Description of the drawings

Fig. 1 is the structure diagram of specific embodiment of the present invention；

Fig. 2 is the enlarged drawing of A in Fig. 1.

Specific embodiment

The utility model is specifically described below by embodiment, is served only for carrying out the utility model further Explanation, it is impossible to be interpreted as the restriction to scope of protection of the utility model.

As shown in Figure 1 and Figure 2, the utility model discloses a kind of Leakproof spherical valve, including left valve seat 1, right valve seat 2 and Faucet body 3, left valve seat 1 and right valve seat 2 are sealingly mounted at the both ends of a connecting tube 4 respectively, and faucet body 3 is driven by valve rod 5, connection The middle waist position of pipe 4 is equipped with the mounting hole 41 passed through for valve rod 5, stuffing box 6 is bolted in mounting hole 41, stuffing box 6 has There is an axis hole 61, the rotatable valve rod 5 of insertion in axis hole 61,61 one end of axis hole is bolted with sealing cover 7, on the endoporus arm of sealing cover 7 Equipped with the corresponding isolation ring 71 of valve rod 5, isolation ring 71 is graphite material, and annular annular seal space 8 is equipped in the axis hole 61, close The rear and front end for sealing chamber 8 is equipped with the rubber ring 81 of annular, and the graphite lantern ring 82 of annular, rubber ring 81 are equipped between rubber ring 81 Inner hole wall is equipped with the ceramic ring 811 of annular, and the subring 821 of annular is equipped on 82 inner hole wall of graphite lantern ring, and subring 821 is Powder metallurgy material, has the through hole 31 that section is prismatic on faucet body 3, the symmetrical angle of two couple on 31 inner wall of through hole It is set in direction in length and breadth.

Locating ring 9 is equipped between left valve seat 1 and the end face of right valve seat 2, locating ring 9 is equipped with corresponding with valve rod 5 Rotation hole 91 is convexly equipped with the moving block 32 to match with the rotation hole 91 on faucet body 3, which is equipped with square Turn slot 321,5 end of valve rod is plugged in turn slot 321.It so can further improve the reliability of the rotation of faucet body 3.

This structure of the utility model, the faucet body 3 on ball valve in rotary course, the through hole 31 of prismatic with left and right When 2 endoporus of valve seat communicates, it is more prone to adjusting control fluid flow, the annular seal space 8 of stuffing box 6 can by the rubber ring 81 at both ends The sealing performance of annular seal space 8 is improved, the ceramic ring 811 on 81 inner hole wall of rubber ring can be contacted with 5 external wall friction of valve rod, can be protected Rubber ring 81, the service life of the rubber ring 81 of raising, and graphite lantern ring 82 can further improve sealing performance, and with valve Structure is more solid and reliable during the CONTACT WITH FRICTION of bar 5, and on 82 inner hole wall of graphite lantern ring powder metallurgy material subring 821 with valve rod 5 when contacting, and can generate lubricating oil, reduces the rotation friction of valve rod 5, and valve rod 5 is made to keep what is rotated for a long time Smoothness so just realizes good seal performance, structure robust techniques effect.

Claims

1. a kind of Leakproof spherical valve, including left valve seat, right valve seat and faucet body, left valve seat and right valve seat are sealingly mounted at respectively The both ends of one connecting tube, faucet body are driven by valve rod, and the middle waist position of the connecting tube is equipped with the mounting hole passed through for valve rod, Stuffing box is bolted in the mounting hole, the stuffing box has axis hole, the rotatable valve is inserted into the axis hole Bar, it is characterised in that：Described axis hole one end is bolted with sealing cover, and the endoporus arm of the sealing cover is equipped with and the valve rod Corresponding isolation ring, the isolation ring are graphite material, and the annular seal space of annular, the sealing are equipped in the axis hole The rear and front end of chamber is equipped with the rubber ring of annular, and the graphite lantern ring of annular, the rubber are equipped between the rubber ring Ring inner hole wall is equipped with the ceramic ring of annular, and the subring of annular, the auxiliary are equipped on the graphite lantern ring inner hole wall Ring is powder metallurgy material, the through hole that there is on the faucet body section to be prismatic, and two couple on the through-hole wall is mutual Symmetrical angle is set in direction in length and breadth.

2. Leakproof spherical valve according to claim 1, it is characterised in that：In the end face of the left valve seat and the right valve seat Between be equipped with locating ring, the locating ring be equipped with the corresponding rotation hole of the valve rod, be convexly equipped on the faucet body The moving block to match with the rotation hole, the moving block upper surface are equipped with square turn slot, and the valve stem end is plugged on In the turn slot.