CN202007896U

CN202007896U - Ball stop valve

Info

Publication number: CN202007896U
Application number: CN2011200804546U
Authority: CN
Inventors: 王根忠; 李进
Original assignee: JIANGFEN ELECTRICAL ANALYZERS CO Ltd JIANGSU
Current assignee: JIANGFEN ELECTRICAL ANALYZERS CO Ltd JIANGSU
Priority date: 2011-03-24
Filing date: 2011-03-24
Publication date: 2011-10-12
Anticipated expiration: 2021-03-24

Abstract

The utility model discloses an industrial stop valve, wherein the guiding function exists between a valve cap and a valve rod, and a valve disk and the valve rod are connected through balls. A sealing surface between the valve body and the valve disk is a line contact surface, thereby having excellent leak tightness; and a plurality of sealing surfaces are arranged between the valve rod and the valve cap, thereby radically avoiding the phenomena of 'fleeing, emitting, dripping and leaking' of the valve.

Description

The ball stop valve

Technical field

The utility model relates to the industrial stop valve that has employing ball binding between guide function, valve disc and the valve rod between a kind of valve gap and the valve rod.

Background technique

Valve is the control gear of fluid circuit, and its fundamental function is the circulation that switches on or off the pipeline medium, changes the circulating direction of medium, regulates the pressure and the flow of medium, the normal operation of protective tube pipeline equipment.

Along with the continuous development of modern industry, the demand of valve constantly increases, and a modern petrochemical plant just needs up to ten thousand valves miscellaneous.The use amount of valve is big, opens and closes frequently, but often owing to make, use type selecting and keep in repair improper generation " run, drip, leak " phenomenon, causes flame, blast, poisoning, scald accident thus, and is of common occurrence.Therefore, people wish to obtain high-quality valve, also require to improve use, the maintenance levels of valve simultaneously, and this has proposed higher designing requirement to the project planner.

The model utility content

The utility model has adopted has the industrial stop valve that adopts ball to link between guide function, valve disc and the valve rod between a kind of valve gap and the valve rod.

Description of drawings

1, handwheel, 2, the valve bonnet seal cap, 3, valve bonnet seal cap pad 1,4, valve bonnet seal cap L briquetting, 5, valve bonnet seal cap pad 2,6, valve rod, 7, valve gap, 8, valve stem packing ring 1,9, valve

stem packing ring

2,10, ball, 11, the valve gap fastening bolt, 12, sealing ball screw, 13, valve disc, 14, valve body, 15, the polytetrafluoroethylsealed sealed circle of valve disc, 16, the polytetrafluoroethylsealed sealed circle compressing tablet of valve disc, 17, valve seals.

Embodiment

The valve assembly process of this model utility is:

1, the polytetrafluoroethylsealed sealed circle of valve disc (15) is enclosed within on the valve disc (13), press the polytetrafluoroethylsealed sealed circle compressing tablet of valve disc (16), with outside swollen the rising in the end of valve disc (13), polytetrafluoroethylsealed sealed circle (15) is pressed in the mounting groove of valve disc (13) tightly valve disc up to the polytetrafluoroethylsealed sealed circle compressing tablet of valve disc (16) with special-purpose tensioner frock.

2, valve rod (6) is packed into valve disc (13), several the balls (10) of packing in the ball mounting hole of valve disc (13), ball is sealed in the valve disc with lubricant grease, will seal ball screw (12) then and screw in the valve disc (13).

3, with valve stem packing ring 1(8) and valve stem packing ring 2(9) be respectively charged in the mounting groove of valve gap (7), and will go on foot poly-1 valve disc that assembles (13) and valve rod (6) packing together screws in the tapped hole of valve gap (7), it is interior until the moment of torsion that reaches certain unit strength together to screw in valve body (14) together with valve seals (17).

4, reinstall valve bonnet seal cap pad 2(5 respectively), valve bonnet seal cap L briquetting (4), valve bonnet seal cap pad 1(3), valve bonnet seal cap (2) and handwheel (1).Screw in valve gap fastening bolt (11) at last.

Work characteristics of the present utility model is:

No matter 1, where valve disc is in, valve disc is to slide in the guide hole of valve gap lower end inner chamber all the time, thereby guaranteed that valve rod and valve disc and material feeding mouth are coaxial, that is the center line of material feeding mouth is vertical all the time with the sealing surface of valve disc, the polytetrafluoroethylsealed sealed circle of valve disc is designed to line with the sealing surface of valve body and contacts, and has guaranteed good sealing property.

2, the binding form of valve rod and valve disc has adopted the ball binding, and almost without any resistance, ball is sealed in the valve disc with lubricant grease between valve rod and the valve disc, can guarantee valve work reliably and with long-term.

3, when valve closing, the part that the polytetrafluoroethylsealed sealed circle of valve disc contacts with valve body, valve body has adopted the conical surface, the polytetrafluoroethylsealed sealed circle of valve disc then is one 90 ° a right angle face (referring to partial view B), at this moment, two surface of contact are line surface of contact of a rigidity and ptfe plastic material, have had good sealing property, thereby guaranteed that valve is being in when closing, valve can thoroughly block the liquid communication of pipeline.

4, go out outside the valve body for the liquid that guarantees valve is impermeable between valve rod and the valve gap, adopted multiple-sealed (referring to partial view A), thereby can guarantee under any operating conditions, all can work reliably.

5, the polytetrafluoroethylsealed sealed circle compressing tablet of valve disc has fixedly adopted the fastening form of valve disc bottom spreading that allows, avoided original general valve employing screw or nut fastening, happen occasionally screw or nut loosening, thus cause the valve invalidation situation to take place, further improved the reliability of valve.

6, the lower end of valve gap has a pilot hole (figure do not show), and auspicious on this pilot hole have a very little micro-hole, and when moving upward under the drive of valve disc at valve rod, the air in the guide hole is discharged, thereby can not hinder moving upward of valve disc.

Claims

1. has guide function between valve gap and the valve rod, the industrial stop valve that adopts ball to link between valve disc and the valve rod, mainly by valve body, valve gap, valve rod, component such as valve disc are formed, and it is characterized in that, sealing surface between valve body and the valve disc has adopted line surface of contact form, has good sealing property.

2. according to right 1 described ball stop valve, wherein, where no matter valve rod be in, and sliding in the pilot hole of valve gap lower end all the time in the cylndrical surface of valve disc upper end, thereby has guaranteed the center line of valve rod and the central lines of valve import.

3. according to right 1 described ball stop valve, wherein, the form of ball binding has been adopted in the binding of valve rod and valve disc, and ball is packed into from the lateral aperture of valve disc after valve rod is packed valve disc into, seals with screw again; Before packing into, in the groove of valve disc and valve rod, smear an amount of lubricant grease, with the nothing friction rotation of the antirust and valve rod that guarantees ball.

4. according to right 1 described ball stop valve, wherein, the polytetrafluoroethylsealed sealed circle compressing tablet of valve disc fixedly adopted the fastening form of valve disc bottom spreading that allows.

5. according to right 1 described ball stop valve, wherein, the pilot hole of valve gap lower end last auspicious has a very little micro-hole, and when moving upward under the drive of valve disc at valve rod, the air in the guide hole is discharged, thereby can not hinder moving upward of valve disc.

6. according to right 1 described ball stop valve, wherein, adopted multiple-sealed to go out outside the valve body between valve rod and the valve gap so that the liquid that guarantees valve is impermeable.