CN202144806U

CN202144806U - Piston-controlled reversal valve

Info

Publication number: CN202144806U
Application number: CN201120243132U
Authority: CN
Inventors: 袁才富; 张妮; 朱剑根; 沈至伟
Original assignee: Shanghai Lixin Hydraulic Co Ltd
Current assignee: Shanghai Lixin Hydraulic Co Ltd
Priority date: 2011-07-11
Filing date: 2011-07-11
Publication date: 2012-02-15
Anticipated expiration: 2021-07-11

Abstract

A piston-controlled reversal valve includes a valve body, wherein a valve core is arranged in a main hole in the valve body; two pin shafts contacted with end surfaces are arranged at the two ends of the valve core; reset springs are arranged at the two ends of the valve core; end surface screw caps are arranged at the two ends of the valve body; the pin shafts penetrate the end surface screw caps; front covers are connected with the two ends of the valve body; a piston is arranged in the front cover; the pin shafts are contacted with the pistons; and a control oil port is arranged on the outer side of the front cover. The control oil ports of the piston-controlled reversal valve are directly arranged on the two end covers, and the pistons are driven by fluid or gas, so as to drive the valve core to reverse. The piston-controlled reversal valve adopts a direct acting structure, and is simple to process and convenient to maintain and dismount.

Description

Piston control selector valve

Technical field

The utility model relates to the hydraulic product technical field, concrete relates to a kind of hydraulicdirectional control valve that has piston control.

Background technique

Hydraulicdirectional control valve is a kind of direction selector valve more general in the hydrovalve, and it is widely used in engineering machinery, metallurgy, lathe and industrial field etc.It mainly passes through moving of control spool, thereby obtains required function position, i.e. break-make situation between each hydraulic fluid port.Control spool moved multiple mode, Electromagnetic Control is arranged, manually control, surge control etc.

Traditional liquid controlled reversing valve arrangement is seen accompanying drawing 1.Because traditional hydraulic control valve valve inner runner is more, it is also many that the bottom surface flows to the hole, the structure more complicated, and processing request is higher; The control of traditional hydraulic control valve oil is the junction surface input from the bottom in addition; Act on spool end through the runner hole, thereby the switching-over of promotion spool, owing to have certain matching gap between the spool valve body; So the pressure loss in the commutation process is bigger, causes the waste of energy.

The model utility content

The utility model technical problem to be solved is, overcomes the problem that exists in the existing technology, and a kind of piston control selector valve of novel structure is provided.

For the technological scheme that addresses the above problem the utility model is such:

Piston control selector valve comprises a valve body, and valve inner is provided with spool; Spool is arranged in the main aperture of valve inner, and the spool two ends are provided with two bearing pins that contact with spool end, and the spool two ends are provided with Returnning spring; Two ends of valve body is provided with the end face blind nut, and said bearing pin passes the end face blind nut, and two ends of valve body is connected with protecgulum; Be provided with piston in the protecgulum, said bearing pin contacts with piston, and the protecgulum arranged outside has control port.

Be connected through screw between said protecgulum and the valve body.

Said end face blind nut is through in the main aperture that is threaded in the valve body two ends, and inboard, main aperture two ends is provided with internal thread, and end face blind nut end is provided with outside thread.

Beneficial effect, the described piston of the utility model control selector valve, this product are on traditional pilot operated directional control valve basis, to carry out improvedly, and it is except having the characteristics of traditional hydraulic control valve, also have simple in structure, be easy to batch produce processing; Reversing impact is little; Part universality is wide; Hydraulic control power is little; But Remote; Characteristics such as use occasion is more extensive.

Description of drawings

Specify the utility model below in conjunction with accompanying drawing and embodiment;

Fig. 1 is traditional pilot operated directional control valve structural representation in the existing technology.

The described piston control of Fig. 2 the utility model selector valve structural representation.

Fig. 3 is the described piston control of a utility model selector valve front-cover structure schematic representation.

Wherein, 1-protecgulum; The 2-seal ring; The 3-piston; The 4-bearing pin; The 5-spring; The multi-stage sealed circle of 6-; The 7-screw; The 8-packing ring; The 9-jump ring; 10-end face blind nut; The 11-seal ring; The 12-spring; The 13-back-up ring; The 14-spool; The 15-valve body; 16-bottom surface seal ring; The 21-air vent; 22-seals chamfering; The 23-guide surface; The 24-tool withdrawal groove; The 25-attachment face.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.

Referring to Fig. 2 and Fig. 3, a kind of piston control selector valve, mainly oil (gas) pressure through external control mouth X1 or X2 promotes spool and moves, thereby obtains the break-make on each oil (gas) road, thereby realizes required function.Valve body 15 has guaranteed the reliability that spool 14 moves with the effective clearance of spool 14.Back-up ring 13 and spring 12 are set respectively at spool 14 two ends, and end face blind nut 10 is threaded with valve body 15 employings and is spacing through by multi-stage sealed circle 6 sealings packing ring being set, and the through hole that bearing pin passes end face plug screw 10 is corresponding with the two ends slide valve slot.Control mechanism is made up of a protecgulum 1, seal ring 2, piston 3.

On valve body 15, make a main aperture and cooperate, make undercut groove and each casting runner communication successively, form each runner hole along main aperture with spool 14.Make connecting thread at valve body 15 two ends and cooperate, guarantee to connect reliable nothing through seal ring 11 and leak with end face blind nut 10.End face blind nut 10 seal grooves are provided with a shoulder and place packing ring 8, play the effect of axial limiting, in the middle of end face blind nut 10, make a through hole, and this through hole cooperates with bearing pin, for mobile the playing of bearing pin led and supporting effect.Spring force effect lower gasket 8 at spring 12 places both ends of the spring respectively with back-up ring 15, and this moment, spool 14 was in initial position.Make seal groove in valve body 1 bottom surface, the cooperation through bottom surface seal ring 16 can guarantee that valve does not have and leak and the entering of external dust in connection procedure.

On spool 14 end faces of both sides, make two blind holes respectively; This blind hole cooperates with bearing pin 4 stub ends and is through jump ring 9 that it is spacing; The path of bearing pin 4 passes back-up ring 8, multi-stage sealed circle 6, end face blind nut 10 successively, and corresponding with the end face groove of piston 3, when hydraulic oil (gas) promotion piston 3 moves; Promote bearing pin 4 generations at the bottom of piston 3 end face grooves and move axially, thereby drive spool 14 switching-overs.

Piston 3 is a cylinder table constitutional detail, to making a seal groove, is used to place seal ring 2 along piston 3 outer circle diameters, and the setting of this circle can effectively prevent the inflow of control oil (air).On the cylindrical guide surface, make many compensating grooves, this not only is convenient to shelter evil people and countenance evil practices and can also makes valve core movement stable.The shoulder of end is to be used to place spring 5, is pushed to protecgulum withdrawing groove face at the effect lower piston 3 of spring force.The counterbore of making at piston land end place, this counterbore end face blind nut is corresponding.

On protecgulum 1, make a ladder through hole, main aperture is external connection mouth, on main aperture, makes screw thread, and screw thread right-hand member place makes flat scraping, and the attachment face 25 when being the pipe joint connection is made tool withdrawal groove 24, guide surface 23, sealing chamfering 22 successively at the screw thread left end.The setting of tool withdrawal groove 24 can effectively reduce difficulty of processing; Enough gaps that guide surface 23 and piston are 3 can guarantee the reliability of piston motion; Sealing chamfering 22 can protect seal ring 2 in installation process, not to be damaged, and has guaranteed valve reliability in use.Since piston 3 in moving process and the space between the end face blind nut 10 diminish, inner air need be discharged, and is failure to actuate so the setting of air vent 21 can effectively solve because of exhaust problem causes piston.Make 4 at the protecgulum stub end screw is installed, through the connection of screw 7, effective connecting together with protecgulum and valve body.

The as shown in Figure 1 explanation, when hydraulic oil when oil inlet P gets into, spool makes spool remain on the neutral position under the elastic force effect of two ends spring.When external control oil (gas) when X1 gets into, control oil (gas) promotes guiding valve and overcomes spring force and move to right, pushing pin axle drive spool moves to right after running into pin roll end face, thereby obtains left working position.When external control oil (gas) when X2 gets into, control oil (gas) promotes guiding valve and overcomes spring force and move to left, pushing pin axle drive spool moves to left after running into pin roll end face, thereby obtains right working position.

In the present embodiment, the control port of piston control selector valve is set directly on the two end cap, promotes piston with liquid or gas, drives the spool switching-over.The structure of direct-acting type, processing is simple, and repair demolition is convenient.The seal ring that the piston place is provided with can be guaranteed that control oil (gas) is depressed at less oil (gas) and just can realize the mobile of spool; The spring that piston and spool place are provided with has effectively reduced impact and the vibrations of valve in commutation process, has increased the working life of valve; The part universality of forming this valve is wider, and is easy to modular design; This valve of while can not only be used for hydraulic control and can also satisfy pneumatic control, makes its application more extensive.

More than show and described the advantage of basic principle, major character and the utility model of the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.

Claims

1. piston control selector valve comprises a valve body, and valve inner is provided with spool, and spool is arranged in the main aperture of valve inner; It is characterized in that the spool two ends are provided with two bearing pins that contact with spool end, the spool two ends are provided with Returnning spring; Two ends of valve body is provided with the end face blind nut, and said bearing pin passes the end face blind nut, and two ends of valve body is connected with protecgulum; Be provided with piston in the protecgulum, said bearing pin contacts with piston, and the protecgulum arranged outside has control port.

2. piston according to claim 1 control selector valve is characterized in that, is connected through screw between said protecgulum and the valve body.

3. piston control selector valve according to claim 1 is characterized in that said end face blind nut is through in the main aperture that is threaded in the valve body two ends, and inboard, main aperture two ends is provided with internal thread, and end face blind nut end is provided with outside thread.