CN2055556U

CN2055556U - Hydraulic-control check valve

Info

Publication number: CN2055556U
Application number: CN 89210316
Authority: CN
Inventors: 徐学新
Original assignee: SHENGYANG HYDRAULIC ELEMENTS FACTORY
Current assignee: SHENGYANG HYDRAULIC ELEMENTS FACTORY
Priority date: 1989-04-06
Filing date: 1989-04-06
Publication date: 1990-04-04

Abstract

The utility model relates to a hydraulic-control check valve, belonging to the improvement of the hydraulic-control check valve, and comprising a valve body, a control piston, a valve sleeve, a conical valve core, a return spring, a seal element and a valve cap. The utility model is characterized in that the hydraulic-control check valve adopts the structural form of a two-way cartridge valve, and the utility model which is particularly suitable for loops which need strict pressure maintaining in various hydraulic systems has reasonable design, favorable sealing performance, high qualified rate of the products made by one time, convenient maintenance and high product quality, and can extend the time of no leakage, increase the interchangeability and reduce the maintenance cost.

Description

Hydraulic-control check valve

The utility model relates to a kind of Pilot operated check valve, belongs to the improvement of Pilot operated check valve, is particularly suitable for need adorning usefulness on the loop of strict pressurize in all kinds of hydraulic systems.

The domestic and international structure of Pilot operated check valve in the past, all adopt spool and valve body Spielpassung, seal by spool head and the valve seat that is set in the valve body, because valve body is irregular cuboid, repeatedly processing in the valve opening course of working, after being installed several times, make the coaxality of valve opening and valve seat orifice lower, in addition the resultant error after the assembling, cause the spool conical surface and valve seat end face seal not tight, so the first-time qualification rate of product is lower, it is short not have the endurance of leakage, needs to change valve body after the valve body wearing and tearing simultaneously, the maintenance expenses height, once adopted the valve pocket structure at home and abroad in the stacking type hydraulic control check valve, but processed complex, the cost height.

The purpose of this utility model is to provide a kind of employing two-way plug-in valve structure, guarantees the coaxality of critical component, and good airproof performance prolongs no leak time, the Pilot operated check valve that the product first-time qualification rate is high.

The purpose of this utility model realizes by the following technical solutions, by valve body 5 control pistons 4, return spring 3, Sealing 8 and valve gap 6,7 are formed, its control piston 4 is in an end is packed valve body 5 into, valve pocket 1 with Sealing 8 is in the other end is packed valve body 5 into, poppet valve core 2 is packed in it, and return spring 3 is packed into wherein, and valve gap 6,7 is contained in both sides.

The sidewall upper edge circumference of described valve pocket 1 and poppet valve core 2 has the control oilhole that several communicate with the poppet valve core inner chamber.

Described poppet valve core 2 also can be the poppet valve core 10 that the center has guide's drain charge spool 9.

The utility model compared with prior art, adopt the structural type quality of product that improved reasonable in design of two-way plug-in valve, good airproof performance, prolong no leak time product first-time qualification rate height, increased interchangeability, convenient for maintaining, the reduction cost of repairs, simultaneously simple in structure, implement to be beneficial to and to apply easily.

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

Fig. 2 is another embodiment's of the utility model a structural representation.

Enforcement of the present utility model is described in conjunction with the accompanying drawings, can add the valve body 5 that forms through machine by casting, control piston 4 is in an end is packed it into, valve pocket 1 poppet valve core 2 with Sealing 8, return spring 3 is packed into wherein in turn from the other end, the sidewall upper edge circumference of valve pocket 1 and poppet valve core 2 has the oil flow hole that several communicate with the P2 chamber, and valve gap 6,7 is loaded on the two ends of valve body 5 respectively, and poppet valve core 2 also can the center of making has the poppet valve core 10 of guide's drain charge spool 9.

Claims

1, a kind of Pilot operated check valve, form by valve body 5, control piston 4, return spring 3, Sealing 8 and valve gap 6,7, it is characterized in that control piston 4 is in an end is packed valve body 5 into, valve pocket 1, poppet valve core 2 with Sealing 8, return spring 3 is in the other end is packed it in turn into, and valve gap 6,7 is loaded on two ends.

2, one-way valve according to claim 1 is characterized in that the sidewall upper edge circumference of described valve pocket 1 and poppet valve core 2 has the control oilhole that several communicate with the poppet valve core inner chamber.

3, one-way valve according to claim 1 is characterized in that described poppet valve core 2 also can the center of making has the poppet valve core 10 of guide's drain charge spool 9.