A kind of antifreeze ball valve
Technical field
The utility model belongs to valve technology field, relates to a kind of ball valve, particularly a kind of antifreeze ball valve.
Background technique
Ball valve is a kind of open-shut device, and ball sealer is driven by valve rod, and rotates around the axis of valve rod, generally speaking, handle with sleeve round about respectively half-twist can realize unlatching or the cut-off of valve.
In patent [CN201412550Y], a kind of safe antifreeze ball valve is disclosed, comprise valve body, be located at the ball sealer in the seal ring installation room of valve body, valve rod and handle, in seal ring, be provided with passage, the inner connection of valve rod ball sealer valve rod outer end is stretched out valve body and is connected with handle, valve body two ends are water inlet and weep hole, on ball sealer wall body, be also provided with the spilled water hole with channel connection, valve closing state, water outlet, spilled water hole, passage, ball sealer installation room, weep hole is communicated with successively, Auto-drainage frost valve in off position under, ponding in the equipment that water outlet connects is discharged through the passage of ball sealer spilled water hole and weep hole composition, reach automatically the water outlet connecting tube of valve body and valve body, the object that unnecessary ponding in equipment is discharged, thereby play the protective action to equipment when the cold and hot variation of temperature.
But in the antifreeze ball valve that above-mentioned patent is described, during valve closing, the water outlet connecting tube of valve body and valve body, the water in equipment can all flow out from weep hole, cause the whole backflows in connecting tube and equipment, thereby waste water resource.
Summary of the invention
The purpose of this utility model is the problems referred to above that exist for existing technology, and a kind of antifreeze ball valve is provided, and technical problem to be solved in the utility model is the damage that how to prevent that the ponding in main valve body from freezing to main valve body.
The purpose of this utility model can realize by following technical proposal: a kind of antifreeze ball valve, comprise main valve body, be arranged on the ball sealer in main valve body, valve rod and handle, described valve rod the inner is connected with ball sealer, described valve rod outer end is stretched out outside main valve body and with handle and is connected, on described main valve body, also there is a water intake and a water outlet, described ball sealer is provided with the surface of running through ball sealer and the water passage hole that can be communicated with water intake and water outlet, it is characterized in that, described main valve body outer wall is provided with an auxiliary valve body, described auxiliary valve body has an entrance and an outlet, in described ball sealer, offer a surperficial overflow through hole that runs through ball sealer, under described ball valve closed condition, described overflow through hole is communicated with described water outlet and entrance, in described auxiliary valve body, be also provided with a Returnning spring, one end and the valve interior wall of described Returnning spring lean, the other end of described Returnning spring and a spool being slidably connected in auxiliary valve body lean.
When the water passage hole on ball sealer is communicated with water intake and water outlet, overflow through hole is blocked by main valve body, ball valve routine work, rotatable handle makes ball sealer close ball valve, now, overflow through hole is communicated with the entrance on water outlet and auxiliary valve body, do not open for a long time ball valve, the water temperature of water outlet changes, when particularly low temperature freezes, in pipeline between water outlet and the associated components that is connected with water outlet, the volume of mixture of ice and water increases, ponding pressed home spring after hydraulic pressure raises, when spool is subject to hydraulic pressure left and right to move to exit position in auxiliary valve body, entrance and exit communicates, part ponding in pipeline between water outlet and the associated components that is connected with water outlet can pass through water outlet successively, overflow through hole, entrance, auxiliary valve body inner chamber and outlet flow out to outside ball valve, the hydraulic pressure of water outlet is reduced, thereby protection ball valve, when water outlet hydraulic pressure is reduced to while being less than Returnning spring pretightening force, spool is again by the valve pocket cut-off between entrance and exit, water outlet can not be wasted with the ponding in the equipment being connected with water outlet.
In above-mentioned antifreeze ball valve, described ball valve also comprises the joint of a hollow, on described main valve body sidewall, offers a mounting hole, and one end of described joint is threaded with described mounting hole, and the other end of described joint is threaded with described entrance.Auxiliary valve body can disassemble from main valve body, is convenient to the maintenance of auxiliary valve body and replacing.
In above-mentioned antifreeze ball valve, described outlet is opened on the sidewall of described auxiliary valve body, on described spool, have a positioning boss, one end of described Returnning spring is set on described positioning boss, and the other end of described Returnning spring is resisted against in the bottom interior wall of auxiliary valve body.This positioning boss positions Returnning spring, and compression direction when Returnning spring is compressed leads; When valve core movement is during to outlet port, the entrance and exit on auxiliary valve body communicates.
In above-mentioned antifreeze ball valve, on described spool, be also arranged with a seal ring, the outer side surface of described seal ring and the lower end surface of joint lean.The outer side surface of seal ring and the lower end surface of joint lean, can make Returnning spring all the time in compressive state, Returnning spring pretightening force is now the pressure minimum that spool can move, spool can not move easily, reduced the frequency of valve core movement, the working life and the precision that have extended auxiliary valve body keep the phase.
In above-mentioned antifreeze ball valve, the two ends of described valve rod are connected mutually with ball sealer and handle respectively.
Compared with prior art, the utlity model has following advantage:
1, this antifreeze ball valve can be under ball valve be closed shape, control the hydraulic pressure of water outlet, prevent water outlet and in the equipment being connected with water outlet raise two pairs of ball valves and pipeline of hydraulic pressure cause damage, particularly in the situation that ponding is lower, freezing ball valve in the time of can effectively preventing that ponding from freezing.
2, when water outlet hydraulic pressure is elevated to certain value, auxiliary valve seat just starts the ponding of water outlet to discharge, when hydraulic pressure declines, again close outlet, avoided water outlet to be all discharged from the ponding in the equipment being connected with water outlet the water resource waste causing.
3, the outer side surface of seal and the lower end surface of joint lean, can make Returnning spring all the time in compressive state, Returnning spring pretightening force is now the pressure minimum that spool can move, spool can not move easily, reduced the frequency of valve core movement, the working life and the precision that have extended auxiliary valve body keep the phase.
Accompanying drawing explanation
Fig. 1 is the structural representation under this antifreeze ball valve opening state.
Fig. 2 is the structural representation under this antifreeze ball valve closed condition.
Fig. 3 is the enlarged view of local A in Fig. 1.
In figure, 1, main valve body; 2, ball sealer; 21, water passage hole; 3, valve rod; 4, handle; 51, water intake; 52, water outlet; 6, auxiliary valve body; 61, entrance; 62, outlet; 63, spool; 64, Returnning spring; 65, positioning boss; 66, seal ring; 7, overflow through hole; 8, joint; 9, mounting hole.
Embodiment
Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As depicted in figs. 1 and 2, this antifreeze ball valve comprises main valve body 1, be arranged on the ball sealer 2 in main valve body 1, valve rod 3 and handle 4, valve rod 3 is inner to be connected mutually with ball sealer 2, valve rod 3 outer ends are stretched out outside main valve body 1 and with handle 4 and are connected mutually, on main valve body 1, also there is a water intake 51 and a water outlet 52, ball sealer 2 is provided with the surface of running through ball sealer 2 and the water passage hole 21 that can be communicated with water intake 51 and water outlet 52, main valve body 1 outer wall is provided with an auxiliary valve body 6, auxiliary valve body 6 has an entrance 61 and an outlet 62, in ball sealer 2, offer a surperficial overflow through hole 7 that runs through ball sealer 2, under ball valve closed condition, overflow through hole 7 is communicated with water outlet 52 and entrance 61, in auxiliary valve body 6, be also provided with a Returnning spring 64, one end and the valve interior wall of Returnning spring 64 lean, the other end of Returnning spring 64 and a spool 63 being slidably connected in auxiliary valve body 6 lean.
As shown in Figure 3, ball valve also comprises the joint 8 of a hollow, on main valve body 1 sidewall, offer a mounting hole 9, one end of joint 8 is threaded with mounting hole 9, the other end of joint 8 is threaded with entrance 61, auxiliary valve body 6 can disassemble from main valve body 1, be convenient to the maintenance of auxiliary valve body 6 and replacing, outlet 62 is opened on the sidewall of auxiliary valve body 6, on spool 63, there is a positioning boss 65, one end of Returnning spring 64 is set on positioning boss 65, 65 pairs of Returnning springs 64 of this positioning boss position, and the compression direction during to Returnning spring 64 compression leads, the other end of Returnning spring 64 is resisted against in the bottom interior wall of auxiliary valve body 6, when spool 63 moves to outlet 62 place, entrance 61 and outlet 62 on auxiliary valve body 6 communicate.
As shown in Figure 3, on spool 63, be also arranged with a seal ring 66, the lower end surface of the outer side surface of seal ring 66 and joint 8 leans, the lower end surface of the outer side surface of seal ring 66 and joint 8 leans, can make Returnning spring 64 all the time in compressive state, Returnning spring 64 pretightening force is now the pressure minimum that spool 63 can move, and spool 63 can not move easily, reduced the frequency of spool 63 motions, the working life and the precision that have extended auxiliary valve body 6 keep the phase.
As shown in Figure 1, when the water passage hole 21 on ball sealer 2 is communicated with water intake 51 and water outlet 52, overflow through hole 7 is blocked by main valve body 1, ball valve routine work, as shown in Figure 2, rotatable handle 4 makes ball sealer 2 close ball valve, now, the entrance 61 that overflow through hole 7 is communicated with on water outlet 52 and auxiliary valve body 6, do not open for a long time ball valve, the water temperature at water outlet 52 places changes, when particularly low temperature freezes, in pipeline between water outlet 52 and the associated components that is connected with water outlet 52, the volume of mixture of ice and water increases, ponding pressed home spring 64 after hydraulic pressure raises, when spool 63 is subject to hydraulic pressure left and right to move to outlet 62 position in auxiliary valve body 6, entrance 61 and outlet 62 communicate, part ponding in pipeline between water outlet 52 and the associated components that is connected with water outlet 52 can pass through water outlet 52 successively, overflow through hole 7, entrance 61, auxiliary valve body 6 inner chambers and outlet 62 flow out to outside ball valve, the hydraulic pressure at water outlet 52 places is reduced, thereby protection ball valve, when water outlet 52 place's hydraulic pressure are reduced to while being less than Returnning spring 64 pretightening force, spool 63 is again by entrance 61 with export the cut-off of valve pocket between 62, water outlet 52 can not be wasted with the ponding in the equipment being connected with water outlet 52.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.