CN201386797Y

CN201386797Y - Explosion-proof two-position two-way fluid pneumatic control angle seat valve

Info

Publication number: CN201386797Y
Application number: CN200920147785U
Authority: CN
Inventors: 贺锐; 李朝晖
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-14
Filing date: 2009-04-14
Publication date: 2010-01-20
Anticipated expiration: 2019-04-14

Abstract

The utility model provides an explosion-proof two-position two-way fluid pneumatic control angle seat valve, which is a fluid control valve. The angle seat valve comprises three systems, namely an explosion-proof casing, a piston body and a valve body; the explosion-proof casing is made of pressureproof alloy and is sleeved on the outer layer of a cylinder block so as to avoid overpressure explosion of the cylinder block; the piston body takes the shape of a double-layered flowerpot body and is made of alloy steel; a valve rod hole in the center of the pot bottom of the upper layer piston is bumped, and a valve rod hole in the center of the pot bottom of the lower layer piston is concave, thereby saving the material and lightening the weight; a screw-type damage prevention sleeve is arranged between a connecting rod casing and a valve body, so as to reduce the thread damage of the valve rod casing or the valve body; the close opening base of the valve is arc-shaped so as to reduce the fluidal resistance; a seal component of the valve rod is formed by stacking a plurality of composite layers formed by interlaminar plastic rings and rubber rings, which can enhance the closeness; a valve core sealing gasket is fixed at the bottom of a valve core through a core bottom screw and a valve core bottom pad; and the valve core is locked on the valve rod through a threaded pin so as to enhance the stability. The utility model has the advantages of good leak tightness, small resistance to the fluid, stable valve core, explosion-proof function, capability of avoiding the whole damage of connecting rod casing or the valve body caused by thread damage and convenient maintenance. In addition, the utility model is suitable to apply to gas and liquid pipelines under certain pressure.

Description

A kind of anti-explosion type two-position two-way fluid pneumatic control angle-pedestal valve

Technical field

The utility model relates to valve, relates in particular to the valve of Pneumatic piston control fluid.

Background technique

At present, in industry and the food production, extensively adopt the flow of pneumatic type valve controlling plumbing fixtures liquid or gas.The common trait of this kind valve is, is power with pressurized air, is actuator with the pneumatic piston, as China's patent 200810200533.9,200810200379.5,200810201418.3 etc.Above patent all exists one or more of following deficiency: do not have an explosion-proof; Stem housing and valve body dismounting destroy flank of thread and cause integral body to be scrapped; Because of the bad quality problems that occur of plastic seal ring performance; Because of the base of valve influences inflow-rate of water turbine for the dihedral seat; Because of fixing bad dislocation of spool, influence is closed; Because of the abundant cost of piston body high.

Summary of the invention

The purpose of this utility model is, provides a kind of and has that explosion prevention function, main part safeguard that spoilage is low, good airproof performance, crosses that flow resistance is little, the spool steadiness is good, saves the control valve for fluids of piston body material, to overcome the deficiency of existing like product.

The purpose of this utility model is achieved in that at the piston body skin and is provided with explosion-proof shell, piston body is double-deck alms bowl bodily form piston, between stem housing and valve body, be provided with screw type loss prevention cover, the pass of valve body remain silent the place the bottom be arc-shaped base, the top of remaining silent in the pass is a plane shape, Sealing around the valve rod adopts the composite seal of plastic ring and rubber ring composition, and screw and spool heelpiece are fixed on the bottom of spool with the seal spool pad at the bottom of the core, and self is locked in spool on the valve rod by threaded.

Good effect of the present utility model is: 1. owing to be provided with explosion-proof shell, can prevent to explode because of the air pressure of fluid is too high, have Security; 2. the composite laminate of taking plastics to add rubber because of valve rod seals the enhanced leaktightness performance; 3. the bottom at place is an arc owing to remain silent in the pass of valve body, can reduce the resistance of fluid, and inflow-rate of water turbine is strengthened; 4. since at the bottom of the core screw and spool heelpiece the seal spool pad is fixed on the bottom of spool, spool self is locked on the valve rod by threaded, has strengthened steadiness, also is convenient to dismounting; 5. owing to be provided with the loss prevention cover between stem housing and valve body, can reduce in safeguarding unloading process, the damage of stem housing or valve body main part increases the service life; 6. owing to adopt the piston of double-deck alms bowl body structure, replace traditional disk piston, dwindled the piston volume, saved piston material.

The utility model integral body has embodied advantages such as volume is little, in light weight, good airproof performance, flow resistance is little excessively, spool is firm, control rate is fast, main body part is durable in use, and has the function of overvoltage explosive-proof protector.

Description of drawings

Fig. 1 is a schematic appearance of the present utility model

Fig. 2 is an internal structure schematic representation of the present utility model

Fig. 3 is the plan view of double-deck alms bowl body piston

Fig. 4 is the upper strata piston schematic representation of double-deck alms bowl body piston

Fig. 5 is lower floor's piston schematic representation of double-deck alms bowl body piston

Among the figure: observe cover 1, go up " O " type packing ring 2, indicating arm 3, spring 4, inner cylinder body 5, outer cylinder body 6, following " O " type packing ring 7, screw 8, nut 9, upper strata piston 10, piston ring 11, lower floor's piston 12, pressure pad 13, pressure pad nut 14, stem housing 15, composite seal 16, valve rod 17 connects screw socket 18, loss prevention cover 19, valve seals 20, valve body 21, spool 22, seal spool pad 23, threaded 24, spool heelpiece 25, screw 26 at the bottom of the valve, explosion-proof shell 27, plastic seal ring 28, rubber seal 29, arc-shaped base 30, last gas port 31, following gas port 32, cylinder ante-chamber 33, cylinder back cavity 34, double-deck alms bowl body piston 35, male ports 36, concave hole 37, alms bowl limit 38, alms bowl encloses 39.

Mode of execution

The utility model is described in further detail below in conjunction with accompanying drawing:

In Fig. 1, explosion-proof shell about in the of 27 two-part fixing by screw 8 and nut 9.The outstanding cover 1 of observing of explosion-proof shell 27 upper end, the first half one side of explosion-proof shell 27 is provided with gas port 31; One side of the Lower Half of explosion-proof shell 27 is provided with down gas port 32, and explosion-proof shell 27 bottom centre are connected with stem housing 15; Loss prevention cover 19 stem housing 15 be connected between the screw socket 18.

In Fig. 2, valve body 21 is by connecting screw socket 18, loss prevention cover 19 be connected shell 15 and be tightly connected, connecting shell 15 is tightly connected with inner cylinder body 5 and outer cylinder body 6 by screw 8 and nut 9, inner cylinder body 5 is tightly connected with observation cover 1, the top of pressure pad nut 14 is provided with indicating arm 13, valve rod 17 is positioned at cylinder body and the center that is connected shell 15, it places an end and the upper strata piston 10 of cylinder body, lower floor's piston 12 is tightly connected, it places the upper end of arc-shaped base 30 to be connected with spool 22, be provided with spring 4 between piston and the cylinder body, connect in the shell 15, the upper end is provided with spring 16, be provided with plastic seal ring 28 below the spring 16, be provided with rubber seal 29 below the plastic seal ring 28, two-part up and down that spool 22 is provided with seal spool pad 23. explosion-proof shells 27 are enclosed within respectively on inner cylinder body 5 and the outer cylinder body 6, and be respectively equipped with on gas port 31 and the following gas port 32. gas port 31 and be communicated with cylinder body respectively with following gas port 32 and contact with the inboard wall of cylinder block sealing with cylinder back cavity 34. pistons by the cylinder ante-chamber 33 that piston is divided into, piston ring 11 is between the slit on two alms bowl limits 38 of upper strata piston 10 and lower floor's piston 12. and go up " O " type packing ring 2 and be positioned at the bottom of observing cover 1, " O " type packing ring 7 is positioned at the combining port of the top and the bottom of explosion-proof shell 27 down, two pressure pads 13 are clamped upper strata piston 10 and lower floor's piston 12, pressure pad nut 14 is fastening with pressure pad 13. and valve seals 20 is positioned at the bottom that connects screw socket 18. and screw 26 and spool heelpiece 25 are fixed on the bottom of spool 22 with seal spool pad 23 at the bottom of the core, and spool 22 self is locked on the valve rod 17 by threaded 24.Composite seal is by the plastic seal ring 28 of upper strata pot shape and overlapping the forming of rubber seal 29 multilayers of lower floor's pot shape, be enclosed within valve rod 17 around.The bottom that valve body 21 closes the place of remaining silent is an arc-shaped base 30, closes the top of remaining silent and be plane shape.

In Fig. 3, Fig. 4, Fig. 5, the flowerpot bodily form that double-deck alms bowl body piston 35 is made for alloyed steel, valve rod hole is left at the center at the bottom of the alms bowl, valve rod hole is a male ports 36 at the bottom of the alms bowl of upper strata piston 10, valve rod hole is that concave hole 37, two alms bowl limits 38 are folded mutually at the bottom of the alms bowl of lower floor's piston 12, and card had piston ring 11 between two alms bowls enclosed 39.Inner cylinder body 5 materials are plastic injection-moulded making, and outer cylinder body 6, valve rod 17, connection shell 15, connection screw socket 18, loss prevention cover 19, valve body 21 materials all are preferably the high-quality stainless steel and make.

The utility model is widely used on the pipe-line system of all types of industries automation control, and all conveyings that relates to fluid need only its viscosity less than 600mm ²/ s all can use, according to pipeline specifications this valve is installed in the pipeline, will controls last gas port 31 and following gas port 32 places that source of the gas is connected in this product, according to pressing the system signal, the control source of the gas enters cylinder body, remain silent in the pass that opens or closes valve body, with medium circulation or blocking-up in the controlling plumbing fixtures. and work finishes, and sends control signal once more, disconnect the control source of the gas, open or close and close not busy mouthful, the medium in blocking-up or the conveyance conduit, a work cycle finishes.

Claims

1, a kind of anti-explosion type two-position two-way fluid pneumatic control angle-pedestal valve, form by pneumatic cylinder body and valve body, it is characterized in that: be provided with explosion-proof shell (27) at the cylinder body skin, piston body is a double-deck alms bowl body piston (35), between stem housing (15) and valve body (21), be provided with screw type loss prevention cover (19), the remain silent bottom at place, the pass of valve body (21) is arc-shaped base (30), closes the top remain silent and be plane shape.The composite seal that valve rod (17) Sealing on every side adopts plastic ring and rubber ring to form, screw at the bottom of the core (26) and spool pad (25) are fixed on the bottom of spool (22) with seal spool pad (23), and self is locked in spool (22) on the valve rod (17) by threaded (24).

2, anti-explosion type two-position two-way fluid pneumatic control angle-pedestal valve according to claim 1, it is characterized in that, described double-deck alms bowl body piston (35), be the flowerpot bodily form that alloyed steel is made, inner carrier is upper strata piston (10), and outer piston is lower floor's piston (12), the valve rod hole at center is male ports (36) at the bottom of upper strata piston (10) alms bowl, the valve rod hole hole at center is concave hole (37) at the bottom of lower floor's piston (12) alms bowl, and two-layer alms bowl limit (38) is folded mutually, and two alms bowls enclose to block between (39) piston ring (11).

3, anti-explosion type two-position two-way fluid pneumatic control angle-pedestal valve according to claim 1 is characterized in that, described loss prevention cover (19) by self thread bush stem housing (15) be connected between the screw socket (18), the bottom is lined with valve seals (20).

4, anti-explosion type two-position two-way fluid pneumatic control angle-pedestal valve according to claim 1 is characterized in that, described valve body (21), and the remain silent bottom at place, its pass is arc-shaped base (30), closes the top remain silent and be plane shape.

5, anti-explosion type two-position two-way fluid pneumatic control angle-pedestal valve according to claim 1, it is characterized in that, described composite seal is the plastic seal ring (28) of pot shape and lower floor overlapping the forming of rubber seal (29) multilayer for pot shape by the upper strata, be enclosed within valve rod (17) around.