CN205036895U - Movable seals up piston valve member - Google Patents

Abstract

The utility model relates to a movable seals up piston valve member, including the valve body, there are medium import and medium export on the valve body, characterized by: the valve rod is located the valve body, ability axial displacement under the effect of external force or spring force, there is sealed piece on the valve rod, sealed piece both ends off -plate has sealed piston, there is main reset spring between the sealed piece at valve rod top and the valve body, it has the spring to seal between inboard sealed piston of piece and the valve body. The utility model has the advantages of gas accuse exchange system and the hydraulic pressure switching -over control system who leaks can effectually be avoided requiring not have by this valve member. Design, the manufacturing of the valve structure that simultaneously suitable specialized production requirement is not high, the simple enterprise of assembly degree requirement commutates.

Description

Movable type sealed piston valve member

Technical field

The utility model relates to the commutation control class valve member of hydraulic pressure, pressure system, is particularly useful for the field such as truck, engineering vehicle.

Background technique

At present, 24 on market logical, 26 selector valve many employings guiding valve plunger type sealing structures such as logical, this structure has the advantages such as stable working, simple, volume is little.But because sealing pair requirement on machining accuracy is high, assembly technology is complicated, add cost of production, simultaneously because sealability is not well improved, after use a period of time to wear and tear at seal ring, there will be leakage phenomenon, and this structure is only suitable for standardization, large-scale mass production.

Model utility content

The purpose of this utility model is to provide that a kind of easy to process, assembly technology is simple, reliable operation, guarantee that the movable type sealed piston valve member of product zero leakage after commutation sealing is to make up the deficiency of prior art.

The utility model be achieve the goal adopt technological scheme be: movable type sealed piston valve member, comprises valve body, valve body has medium entrance and media outlet,

It is characterized in that: valve rod is positioned at valve body, can move axially under the effect of external force or spring force; Valve rod there is sealing block; Packed-piston is had outside sealing block both ends of the surface;

Master reset spring is had between the sealing block of valve stem top and valve body; Spring is had between packed-piston inside sealing block and valve body.

the beneficial effects of the utility model existin: this valve member can effectively be avoided requiring leak free gas control reversing mechanism and hydraulic pressure reversing control system.Be applicable to less demanding, the assembling degree of Virtual production simultaneously and require that simple enterprise carries out design, the manufacture of structure of reversing valve.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is structural representation of the present utility model.

Embodiment

Embodiment:

In the drawings: 1 is valve body, 2 is valve rods, and 3 is packed-pistons I, and 4 is packed-pistons II, and 5 is springs I, 6 is springs II, and 7 is packed-pistons III, and 8 is springs III, and 9 is packed-pistons IV, 10 is sealing blocks I, and 11 is sealing blocks II, and 12 is medium entrance, and 13 is media outlets.

As shown in Figure 1: valve rod 1 is under spring I 5, spring III 8 act on, the seal lip of sealing block I 10 contact with packed-piston I 3 seal, the seal lip of sealing block II 11 contacts with packed-piston III 7 and seals, medium entrance 12 and media outlet 13 switching relation are as shown by the arrows in Figure 1.

As shown in Figure 1: valve rod 1 overcomes the spring force of spring I 5, spring III 8 under external force F effect, the seal lip of sealing block I 10 contact with packed-piston II 4 seal, the seal lip of sealing block II 11 contacts with packed-piston IV 9 and seals, medium entrance 12 and media outlet 13 switching relation are as shown by the arrows in Figure 2.

Movement process from Fig. 1 to Fig. 2: valve rod 1 overcomes spring III 8 active force and moves down under external force F and spring II 6 act on, and the seal lip of sealing block I 10 first contacts sealing with packed-piston II 4.Valve rod 1 continues to move down simultaneously, promotes packed-piston II 4 and moves down, seal until the seal lip of sealing block II 11 contacts with packed-piston IV 9, valve rod 1 just stop motion, thus achieves medium commutation requirement.

Movement process from Fig. 2 to Fig. 1: cancel external force F, under spring I 5, spring III 8 act on, valve rod 1 resets to the state of Fig. 1.

Claims (1)

1. movable type sealed piston valve member, comprises valve body, valve body has medium entrance and media outlet, it is characterized in that:

Valve rod is positioned at valve body, can move axially under the effect of external force or spring force; Valve rod there is sealing block; Packed-piston is had outside sealing block both ends of the surface;

Master reset spring is had between the sealing block of valve stem top and valve body; Spring is had between packed-piston inside sealing block and valve body.