CN201288842Y

CN201288842Y - Ball valve

Info

Publication number: CN201288842Y
Application number: CNU200820122055XU
Authority: CN
Inventors: 王汉光; 赵承远; 戚永东
Original assignee: ZHEJIANG WEITENG VALVE CO Ltd
Current assignee: ZHEJIANG WEITENG VALVE CO Ltd
Priority date: 2008-07-30
Filing date: 2008-07-30
Publication date: 2009-08-12
Anticipated expiration: 2018-07-30

Abstract

The utility model relates to a ball valve; pressure release holes communicating with outside are arranged at the bottom of the middle chamber of the valve body; inclined holes communicating with output channels and pressure release holes are arranged on the circumferential wall of the ball body; due to the inclined holes on the circumferential wall of the ball body of the ball valve, the left channel of the ball valve is communicated with the middle chamber of the valve body. NPT screwed holes are arranged at the lower part of the middle chamber of the valve body and can be connected with the external pressure release valve; when rising with the temperature changing of environment, the media at the left side of the ball valve can discharge automatically or manually through the discharge holes of the ball body and valve body, to ensure the pressure safety of the media at the left end of the ball valve; when the components at the left side of the ball valve need to be maintained, the pressure of the pipeline system can be discharged conveniently and the components are maintained safely. The positioning handle is pressed to move positioning jaw away from the limited block on the valve body, then the handle is rotated to close and open the ball valve conveniently; the positioning handle is released when the handle is rotated to the limited block; a spring makes the positioning handle reset automatically; and the positioning jaw clamps the limited block. The positioning is precise, reliable and started fast.

Description

A kind of ball valve

Technical field

The utility model relates to a kind of valve, relates in particular to a kind ofly to have release, isolate double-acting ball valve.

Background technique

Original transporting water that is applicable to, oil product, ball valve on the pipeline of media such as gas is by spheroid, valve body, handle, valve rod, parts such as valve seat insert are formed, when the facility of ball valve left end needs to be serviced, the words that the valve both sides have medium to exist just can't be keeped in repair, just can not keep in repair when must have medium by the time, bring certain trouble to maintenance, and the handle that is used for opening and closing valve on the general ball valve all only has ' spacing ' function, the function that does not have ' location ', in practical operation, may occur rotating situation not in place, influence the accurate switching of valve.Offer the groove that holds O-ring seals on the valve seat insert of entrance point valve seat in the past, be sealed and matched by O-ring seals and the further formation of valve body, though O-ring seals can be subjected to the pressure from medium, make it and valve body between produce pretightening force, but this pretightening force not enough, influences sealing effect.

Summary of the invention

The purpose of this utility model is to overcome the defective of prior art, provide a kind of can unidirectional release, keep in repair more convenient, open and close more accurate, faster, the better ball valve of sealing effect.

For achieving the above object, the utility model adopts a kind of ball valve, comprise spheroid, valve body, handle, valve rod, valve seat insert, spheroid is installed in the middle part chamber of valve body, the interior corresponding spheroid both sides of valve body form and are input into, output channel, handle be arranged on valve body directly over, be connected by valve rod and spheroid formation, being provided with valve seat insert and spheroid formation on inlet/outlet end valve seat is sealed and matched, offer the relief hole that is communicated with the outside in the middle part of valve body cavity bottom, on the perisporium of spheroid, offer the inclined hole that is communicated with output channel and relief hole.

The utility model is spacing for handle being rotated formation, be provided with position fixing handle in the handle upper end, the middle part of position fixing handle and handle formation are articulated and connected, be provided with spring between the following pressure side of position fixing handle and the holding end of handle, the front end of position fixing handle forms the location jaw, the location jaw position of corresponding position fixing handle is provided with the limiting stopper of projection on the valve body upper-end surface, and the location jaw constitutes spacing the cooperation with limiting stopper, and handle constitutes rotation or spacing the cooperation by position fixing handle with valve body.

The utility model further is set to the entrance point valve seat forms annular near valve seat insert one side shoulder rank, be provided with seating spring and Sealing shield ring successively between shoulder rank and the valve seat insert, Sealing shield ring and valve seat insert close neighbour are provided with, Sealing shield ring forms circular arc chamfering near the upper/lower terminal of valve seat insert one side, form the open type short slot that holds O-ring seals between circular arc chamfering and the valve seat insert, shoulder rank on the entrance point valve seat are as the slip base of seating spring, and the other end of seating spring is pressed on the valve seat insert.

For release better, be provided with the tapped hole that links to each other with outside pressure relief device at the relief hole place of valve body.

The utility model communicates ball valve left end passage and valve body lumen by offer inclined hole on the spheroid perisporium of ball valve.The NPT tapped hole has been done in valve body lumen bottom, can connect outside pressure relief device, as automatic decompression valve, manual Decompression valves or measuring instrument etc.When the medium of ball valve left end raise owing to ambient temperature changes, the discharge orifice by spheroid and valve body carried out the automatic or manual discharging, assurance ball valve left end pressure medium safety.When the facility of ball valve left end needs to be serviced, can release the pressure of pipe-line system easily, safeguard safely.Make the location jaw leave limiting stopper on the valve body pressing position fixing handle, handle with sleeve can make things convenient for the open and close ball valve then, unclamps position fixing handle when going to limiting stopper, spring automatically resets position fixing handle, location jaw ' pincers ' is lived limiting stopper, and accurate positioning is firm, starts quick.Make traditional integrated type O-ring seals groove into the open type short slot, sealing effect is better.

Description of drawings

Fig. 1 is the utility model example structure schematic representation.

Fig. 2 is the utility model embodiment handling portion structural representation.

Fig. 3 is the utility model embodiment handling portion lock state schematic representation.

Fig. 4 is the utility model embodiment handling portion unlocking condition structural representation.

Fig. 5 is that the K of Fig. 2 is to enlarged view.

Embodiment

As Fig. 1,2,3,4, shown in 5, the utility model specific embodiment is a kind of ball valve, comprise spheroid 1, valve body 2, handle 3, valve rod 4, valve seat insert 5, spheroid 1 is installed in the middle part chamber 21 of valve body 2, corresponding spheroid 1 both sides form and are input in the valve body 2, output channel (22,23), advancing, all being provided with valve seat insert 5 on the outlet end valve seat is sealed and matched with spheroid 1 formation, handle 3 be arranged on valve body 1 directly over, be connected by valve rod 4 and spheroid 1 formation, offer the relief hole 24 that is communicated with the outside in chamber 21 bottoms, the middle part of valve body 2, on the perisporium of spheroid 1, offer the inclined hole 11 that is communicated with output channel 23 and relief hole 24.For release better, be provided with the tapped hole that links to each other with outside pressure relief device at relief hole 24 places of valve body 2.Spacing for handle 3 being rotated formation, be provided with position fixing handle 6 in handle 3 upper ends, the middle part of position fixing handle 6 and handle 3 formations are articulated and connected, be provided with spring 7 between the following pressure side 61 of position fixing handle 6 and the holding end 31 of handle 3, the front end of position fixing handle 6 forms location jaw 62, location jaw 62 positions of corresponding position fixing handle 6 are provided with the limiting stopper 25 of projection on valve body 2 upper-end surfaces, location jaw 62 constitutes spacing the cooperation with limiting stopper 25, and handle 3 constitutes rotation or spacing the cooperation by position fixing handle 6 with valve body 2.The entrance point valve seat forms the shoulder rank 26 of annular near valve seat insert 5 one sides, be provided with seating spring 8 and Sealing shield ring 9 successively between shoulder rank 26 and the valve seat insert 5, Sealing shield ring 9 is provided with valve seat insert 8 close neighbours, Sealing shield ring 9 forms circular arc chamfering near the upper/lower terminal of valve seat insert 5 one sides, form the open type short slot that holds O-ring seals 10 between circular arc chamfering and the valve seat insert 5, shoulder rank 26 on the entrance point valve seat are as the slip base of seating spring 8, and the other end of seating spring 8 is pressed on the valve seat insert 9.

The utility model is by offering inclined hole 11 on spheroid 1 perisporium of ball valve, ball valve left end passage 23 and valve body middle part chamber 21 is communicated, the NPT tapped hole has been done in chamber 21 bottoms, valve body middle part, can connect outside pressure relief device, as automatic decompression valve, manual Decompression valves or measuring instrument etc.When the medium of ball valve left end raise owing to ambient temperature changes, the discharge orifice by spheroid 1 and valve body 2 carried out the automatic or manual discharging, assurance ball valve left end pressure medium safety.When the facility of ball valve left end needs to be serviced, can release the pressure of pipe-line system easily, safeguard safely.Make location jaw 62 leave limiting stopper 25 on the valve body 2 pressing position fixing handle 6, handle with sleeve 3 can make things convenient for the open and close ball valve then, unclamp position fixing handle 6 when going to limiting stopper 25, spring 7 automatically resets position fixing handle 6, location jaw 6 ' pincers ' is lived limiting stopper 25, accurate positioning is firm, starts quick.Make traditional integrated type O-ring seals groove into the open type short slot simultaneously, sealing effect is better.

Claims

1, a kind of ball valve, comprise spheroid, valve body, handle, valve rod, valve seat insert, spheroid is installed in the middle part chamber of valve body, the interior corresponding spheroid both sides of valve body form and are input into, output channel, handle be arranged on valve body directly over, be connected by valve rod and spheroid formation, being provided with valve seat insert and spheroid formation on inlet/outlet end valve seat is sealed and matched, it is characterized in that: offer the relief hole that is communicated with the outside in the middle part of valve body cavity bottom, on the perisporium of spheroid, offer the inclined hole that is communicated with output channel and relief hole.

2, ball valve according to claim 1, it is characterized in that: described handle upper end is provided with position fixing handle, the middle part of position fixing handle and handle formation are articulated and connected, be provided with spring between the following pressure side of position fixing handle and the holding end of handle, the front end of position fixing handle forms the location jaw, the location jaw position of corresponding position fixing handle is provided with the limiting stopper of projection on the valve body upper-end surface, and the location jaw constitutes spacing the cooperation with limiting stopper, and handle constitutes rotation or spacing the cooperation by position fixing handle with valve body.

3, ball valve according to claim 1 and 2, it is characterized in that: described entrance point valve seat forms the shoulder rank of annular near valve seat insert one side, be provided with seating spring and Sealing shield ring successively between shoulder rank and the valve seat insert, Sealing shield ring and valve seat insert close neighbour are provided with, Sealing shield ring forms circular arc chamfering near the upper/lower terminal of valve seat insert one side, form the open type short slot that holds O-ring seals between circular arc chamfering and the valve seat insert, shoulder rank on the entrance point valve seat are as the slip base of seating spring, and the other end of seating spring is pressed on the valve seat insert.

4, ball valve according to claim 1 and 2 is characterized in that: described relief hole place at valve body is provided with the tapped hole that links to each other with outside pressure relief device.

5, ball valve according to claim 3 is characterized in that: described relief hole place at valve body is provided with the tapped hole that links to each other with outside pressure relief device.