CN202176730U

CN202176730U - Safety stop valve

Info

Publication number: CN202176730U
Application number: CN2011203017542U
Authority: CN
Inventors: 赵春岳; 郑子林; 张秀林
Original assignee: YONGYI-VALVE GROUP Co Ltd
Current assignee: YONGYI-VALVE GROUP Co Ltd
Priority date: 2011-08-17
Filing date: 2011-08-17
Publication date: 2012-03-28
Anticipated expiration: 2021-08-17

Abstract

The utility model relates to a safety stop valve, comprising a valve body, a valve clack, a bellows component, a valve cover, a valve rod, a spring, an adjusting thread insert, a valve rod nut and a hand wheel. Mainly, the hand wheel is mounted on the valve cover through a switching mechanism, and the switching mechanism is composed of a switching cap, a fixed screw, the valve rod nut, a direction locating plate, a guide pin and a stop collar. The lower large-diameter part of the valve rod nut is inserted into a mounting hole of the switching cap; the stop collar is fixedly mounted between the periphery of the valve rod nut and the internal wall of the switching cap, and forms a ring-shaped gap with an upper table top of the valve rod nut; the guide pin is mounted in vertical holes at the upper ends of the switching cap and the hand wheel. When the fixed screw is adjusted outwards, the valve rod nut can move upwards in the ring-shaped gap so as to form a safety valve structure; when the fixed screw is adjusted inwards, and simultaneously, the guide pin is pulled out, the valve clack can be lifted or lowered by rotating the hand wheel so as to form a stop valve mechanism. The safety stop valve has the advantages of simple installation, convenient maintenance, low cost, reliable sealing and the like. The safety stop valve is suitable for medium channels which need pressure limitation and cutoff simultaneously.

Description

Safety shutoff valve

Technical field

The utility model relates to valve field, especially a kind of safety shutoff valve.

Background technique

Under some special operating modes; Pipe-line equipment both need have the function of safety relief; Have the function by medium again, present employed method is that safety relief valve and stop valve are installed on equipment simultaneously; Safety relief valve and stop valve are installed in series, and stop valve is installed in the safety relief valve entrance point.The major defect of this mode is: safety relief valve and stop valve all just have the valve of simple function; Because safety relief valve and stop valve are to be installed in series; If stop valve has carried out misoperation; Then will make safety relief valve can't play the effect of overpressure protection, finally cause the generation of perils such as equipment explosion, the back poor reliability that is installed in series, cost height, installation complicacy, maintenance difficult, many, the easy misoperations of leakage point.

Summary of the invention

The purpose of the utility model is the shortcoming that exists to existing technology, provides a kind of and has that safety relief is simple, easy to maintenance with the installation of blocking media feature, cost is low, the reliable safety shutoff valve of sealability.

The utility model is realized through following scheme:

This safety shutoff valve comprises valve body, flap, bellows component, valve gap, valve rod, spring, Adjusting bolt Adjusting screw, Stem Mut, handwheel.Mainly be that handwheel is installed on the valve gap through switching mechanism, this switching mechanism is made up of conversion cap, set screw, Stem Mut, direction positioning plate, guide finger and stop collar.Conversion cap lower thread is installed on the valve gap, and the middle part is shaped on guiding rib, and top is shaped on mounting hole.Major diameter place, Stem Mut bottom is inserted in the conversion cap mounting hole; The upper end is fixedly connected with handwheel; Stop collar is fixedly mounted between the Stem Mut periphery and conversion cap inwall below the handwheel, and its endoporus and Stem Mut outer circumferential face leave the annular space between the upper table surface of its lower end surface and Stem Mut bottom cylinder with large diameter movingly; Set screw is installed on the screw of the outside, annular space conversion cap, and its end diameter equates with the height of annular space.The direction positioning plate is fixedly mounted on the valve rod, and its two ends are shaped on guiding groove and match with the guiding rib at conversion cap middle part.Guide finger is installed in the vertical core of handwheel and conversion cap upper end.

The utility model has the advantages that handwheel is installed on the valve gap through switching mechanism, when set screw was outwards regulated, Stem Mut can make progress in the annular space and move, and constitutes safety valve structure; When set screw is inwardly regulated, remove the guide finger that is installed on handwheel and the conversion cap simultaneously, can the ascending, descending flap through rotation hand wheel, constitute stop valve mechanism.Its installation is simple, easy to maintenance, cost is low, sealability is reliable.

Description of drawings

Fig. 1 is the structure sectional view of the utility model.

Embodiment

Safety shutoff valve as shown in Figure 1 comprises valve body 1, flap 2, bellows component 3, valve gap 6, valve rod 7, spring 18, Adjusting bolt Adjusting screw 9, Stem Mut 12, handwheel 13.One end of bellows component 3 is connected with flap 2 sealing backsides, and the other end is installed between valve body 1 and the valve gap 6, and the guide rod movable set at center, flap 2 back side and is fixedly connected with the lower end of valve rod 7 in guide sleeve 4.Spring 18 is installed between the upper spring seat 8 and lower spring cup 5 on valve gap 6 inner valve stem 7, and Adjusting bolt Adjusting screw 9 is threaded with valve gap 6, and by locking nut 17 fixed installations.Handwheel 13 is installed on the valve gap 6 through switching mechanism, and this switching mechanism is made up of conversion cap 10, set screw 15, Stem Mut 12, direction positioning plate 16, guide finger 11 and stop collar 14.Conversion cap 10 lower thread are installed on the valve gap 6, and the middle part is shaped on guiding rib, and top is shaped on mounting hole.Major diameter place, Stem Mut 12 bottom is inserted in conversion cap 10 mounting holes, and the upper end is fixedly connected with handwheel 13, center screw and valve rod 7 screw-thread fit.Stop collar 14 is fixedly mounted between Stem Mut 12 peripheries and conversion cap 10 inwalls below the handwheel 13; Its endoporus and Stem Mut 12 outer circumferential faces are movingly; Leave the annular space between the upper table surface of lower end surface and Stem Mut 12 bottom cylinder with large diameter, set screw 15 is installed on the screw of the conversion cap 10 outside the annular space, and its end diameter equates with the height of annular space; Front end is shaped on chamfering, can reliably insert in the annular space when it is inwardly regulated.Direction positioning plate 16 is fixedly mounted on the valve rod 7, and its two ends are shaped on guiding groove and match 7 rotations of restriction valve rod with the guiding rib at conversion cap 10 middle parts.Guide finger 11 is installed in the vertical core of handwheel 13 and conversion cap 10 upper ends; Restriction valve rod 7 rotates with Stem Mut 12; This moment, set screw 15 was in the outside, annular space; Stem Mut 12, valve rod 7, flap 2 promote to move up at the superpressure medium, and the annular space between Stem Mut 12 and stop collar 14 disappears, and plays the function of safety valve.Inwardly regulate to get in the annular spaces when set screw 15, and pull out guide finger 11 simultaneously, through rotation hand wheel 13, can drive Stem Mut 12 rotations, poppet stem 7 and flap 2 play the function of stop valve.

Claims

1. safety shutoff valve; Comprise valve body (1), flap (2), bellows component (3), valve gap (6), valve rod (7), spring (18), Adjusting bolt Adjusting screw (9), Stem Mut (12), handwheel (13); It is characterized in that handwheel (13) is installed on the valve gap (6) through switching mechanism, this switching mechanism is made up of conversion cap (10), set screw (15), Stem Mut (12), direction positioning plate (16), guide finger (11) and stop collar (14), and conversion cap (10) lower thread is installed on the valve gap (6); The middle part is shaped on guiding rib; Top is shaped on mounting hole, and major diameter place, Stem Mut (12) bottom is inserted in conversion cap (10) mounting hole, and the upper end is fixedly connected with handwheel (13); Stop collar (14) is fixedly mounted between Stem Mut (12) periphery and conversion cap (10) inwall below the handwheel (13); Its endoporus and Stem Mut (12) outer circumferential face leaves the annular space between the upper table surface of lower end surface and Stem Mut (12) bottom cylinder with large diameter movingly, and set screw (15) is installed on the screw of the conversion cap (10) outside the annular space; Its end diameter equates with the height of annular space; Direction positioning plate (16) is fixedly mounted on the valve rod (7), and its two ends are shaped on guiding groove and match with the guiding rib at conversion cap (10) middle part, and guide finger (11) is installed in the vertical core of handwheel (13) and conversion cap (10) upper end.