CN2426547Y

CN2426547Y - Pressure transportation by-pass valve

Info

Publication number: CN2426547Y
Application number: CN 00233734
Authority: CN
Inventors: 张泰吉
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-12
Filing date: 2000-05-12
Publication date: 2001-04-11
Anticipated expiration: 2010-05-12

Abstract

The utility model relates to a pressure transportation by-pass valve which is composed of a valve body and a valve core, wherein, the cylindrical surface of the valve body is provided with an inlet pipe and two outlet pipes and the valve core is sealed and installed in a cylindrical cavity body of the valve body through a front and a back end covers. The positions of circle edges of the upper and the lower bottom surfaces of the valve core are provided with sealing rings. A generatrix cylindrical surface between two bottom surfaces is provided with two blocking doors of cylindrical arc surfaces, which have splayed radial sections. The edges of the blocking doors are provided with sealing door strips which are in tight contact with pipe mouths of mouth pipes. The utility model has the advantages of simple structure, constant working pressure, small switching force moment, reliable work, no material blockage, no breakdown of machines, good sealing performance and long service life.

Description

Pressure is carried shunt valve

The utility model relates to the improvement of pressure delivery device, specifically is that a kind of pressure is carried shunt valve, and it belongs to mass transport operation technique field.

Two kinds of pressure-feed pipeline shunt valves are arranged in the prior art: a kind of is retaining spile type structure.Its retaining plate is to peg graft to enter the housing cross-section, and this just causes this plate long-pending less with contacting of housing, and tightness is poor, and the power that is hit is big, and working life is short.Referring to Fig. 5～7, it is the cylindrical body valve with H type rotary plate that another kind is arranged.The tubular valve body cylinder of this valve is provided with an import, two outer pipes 3,4,5.This spool 2 is installed in the circular cylindrical cavity of this valve body by forward and backward end cap sealing.Center valve shaft 6 both sides of this spool are provided with parallel large and small two tangential baffle plates 16,15 with this, but its medium and small tangential baffle plate 15 shutoff inlet tubes 3 mouths of pipe, and big tangential baffle plate 16 is two outer pipes of shutoff simultaneously, 4,5 mouths of pipe then.This spool 2 rotation angles are big.For example: when two outlet tube's axis angle α were 47 °, this rotation angle of making up one's mind was 139.7 °.When outer pipe 4 → 5 switched, this spool 2 had one section process of closing all conveyance conduits, as shown in Figure 6, causes mass transport to be obstructed, and causes pipeline obstruction easily, and delivery system pressures increases suddenly, sometimes even blower fan takes place shut down the accident of the motor of damage.Simultaneously in switched conductive outer pipe 4 → 5 o'clock, need bigger moment of rotation, just can make valve core rotation than wide-angle, must adopt long stroke and big footpath cylinder actuating valve mandrel thus, so this shunt valve volume is big, poor reliability, the cost height, operation is difficult, and working life is short.

The purpose of this utility model is the defective that will overcome above-mentioned shunt valve, and it is little to design a kind of switching moment, reliable operation, and unimpeded constant voltage conveying material, putty not, the pressure that does not crash is carried shunt valve.

Task of the present utility model is finished by following technological scheme, develop a kind of pressure and carried shunt valve, it comprises: valve body and spool, wherein be provided with an inlet tube and two outer pipes on tubular valve body cylinder, the spool that has the center valve shaft is installed in the valve cylinder-shaped cavity by forward and backward end cap sealing.Described spool, the circle of its upper and lower bottom surface is provided with seal ring along the place, on the bus cylinder between two bottom surfaces, be provided with the two fan post cambered surface retaining doors that radial cross section is " eight " font, this retaining door can trackslip shutoff on going out on the valve body lumen wall, the inlet tube mouth of pipe, and the edge of this retaining door is provided with and all mouthful of tight sealed door bar that contacts of the pipe mouth of pipe.

Described two outer pipes, the angle α between its axis are 22.5 °～120 °, and the valve core rotation angle is 37.5 °～135 °.

Described spool, the arc chord length that little opening end intercepted between the two fan post cambered surface retaining doors of its " eight " font should equal an outer pipe bore at least.

Described valve body lumen wall, the shape that connects the rank mouth of pipe on its chamber wall can be square, or rectangular, or oval-shaped, or circular; The bore of all this pipes or equal, or the bore of all outlet ports pipe and equal the bore of inlet tube at least.

Advantage of the present utility model is: designed the post cambered surface retaining door of " eight " shaped sections, guaranteed that conveying material is unblocked, and the transportation work constant pressure has been constant.The moment that outer pipe switches is little, realizes easily switching reliably, and putty does not crash.Because adopt seal ring, the bar of upper and lower, left and right different azimuth, its sealing surface is big and performance good.Because the little opening end of " eight " font retaining door cuts the arc string and equals the outer pipe bore at least, guarantees that handoff angle is little, switches smoothly, required moment of rotation is little, and therefore optional small-bore, the rotation cylinder of short stroke makes equipment cost low, high working efficiency.

Embodiment's accompanying drawings of the present utility model is as follows:

Fig. 1 is that the axle of this shunt valve is surveyed decomposition assembling figure;

Fig. 2 is the A → B direction conducting sectional view of this shunt valve;

Fig. 3 is the A → C handoff procedure sectional view of this shunt valve;

Fig. 4 is the A → C direction conducting sectional view of this shunt valve;

Fig. 5 is the A → B direction conducting sectional view of existing shunt valve;

Fig. 6 is the A → C handoff procedure sectional view of existing shunt valve;

Fig. 7 is the A → C direction conducting sectional view of existing shunt valve.

Make a secondary stress referring to Fig. 1～4 and carry shunt valve, it comprises: valve body 1 and spool 2.Wherein be provided with an inlet tube 3 and two outer pipes 4,5 on tubular valve body 1 cylinder, the spool 2 that has center valve shaft 6 is installed in valve body 1 circular cylindrical cavity by forward and backward end cap 7,8 sealings.Designed spool 2, its upper and lower bottom surface 9,10 circles are provided with " O " type seal ring 11,12 along the place.On the bus cylinder between two bottom surfaces 9,10, be provided with the two fan post cambered surfaces retaining doors 14 that radial cross section is " eight " font ', 14 ".This retaining door 14 shutoff going out on valve body 1 chamber wall of can trackslipping is on

inlet tube

5,4,3 mouths of pipe.The edge of this retaining door 14 is provided with the sealed door bar 13 that tightly contacts with all mouthful of

pipe

3,4,5 mouths of pipe.Two outer pipes 4,5 that this designs along separate routes.Angle α is 47 ° between its axis; Spool 2 rotation angles are 62 °.All mouths of pipe be shaped as hemispherical dome shape.

Claims

1, a kind of pressure is carried shunt valve, it comprises: valve body and spool, wherein on tubular valve body cylinder, be provided with an inlet tube and two outer pipes, before the spool that has a center valve shaft passes through, the rear end cover sealing is installed in the valve cylinder-shaped cavity, it is characterized in that: described spool, on it, the circle of bottom surface is provided with seal ring along the place, on the bus cylinder between two bottom surfaces, be provided with the two fan post cambered surface retaining doors that radial cross section is " eight " font, this retaining door shutoff going out on the valve body lumen wall of can trackslipping, on the inlet tube mouth of pipe, the edge of this retaining door is provided with the sealed door bar that tightly contacts with all mouthful of pipe mouth of pipe.

2, pressure according to claim 1 is carried shunt valve, and it is characterized in that: described two outer pipes, the angle α between its axis are 22.5 °～120 °, and the valve core rotation angle is 37.5 °～135 °.

3, pressure according to claim 1 is carried shunt valve, it is characterized in that: described spool, the arc chord length that little opening end intercepted between the two fan post cambered surface retaining doors of its " eight " font should equal an outer pipe bore at least.

4, pressure according to claim 1 is carried shunt valve, it is characterized in that: described valve body lumen wall, and the shape that connects the rank mouth of pipe on its chamber wall can be square, or rectangular, or oval-shaped, or circular; The bore of all this pipes or equal, or the bore of all outlet ports pipe and equal the bore of inlet tube at least.