CN2463629Y

CN2463629Y - Large flow liquid-control one-way valve

Info

Publication number: CN2463629Y
Application number: CN 01201587
Authority: CN
Inventors: 陈纪恩; 陈喜培; 杨仁康
Original assignee: Wenzhou Ji'an Machinery Co ltd
Current assignee: Wenzhou Ji'an Machinery Co ltd
Priority date: 2001-01-19
Filing date: 2001-01-19
Publication date: 2001-12-05
Anticipated expiration: 2011-01-19

Abstract

The utility model relates to a large flow liquid-control one-way valve which is used in the hydraulic system of a coal mine under well support device, composed of a valve body 1, a push rod sheath 2, a valve seat 3, a big push rod 4, a valve pad 5, a big valve 6, a small valve core component 7, a spring 8 and a joint 9, wherein, the big valve (6) and the small valve core component (7) are assembled together to form a secondary unloaded structure which can be started or closed and can respectively unload the size and the energy of overflow, and the big push rod 4 and the small valve core component 3 are linked together to carry out the unloading action. The utility model has improved sealing performance of the large flow liquid-control one-way valve and extended long service life.

Description

Big flow Pilot operated check valve

The utility model relates to employed big flow Pilot operated check valve on a kind of coal mine lower support frame equipment hydraulic system.

At present, to advance back the liquid resistance big for employed Pilot operated check valve on the coal mine lower support frame equipment hydraulic system, and poor sealing, if under high pressure, enlargement discharge, the stability of then working can be affected, serious wear causes leakage, directly influences the working life of valve.

The utility model purpose is to improve the sealability of big flow Pilot operated check valve, improves the working life of valve.

The purpose of this utility model can reach by following measure:

A kind of big flow Pilot operated check valve, form by valve body 1, top stem casing 2, valve seat 3, big push rod 4, valve pad 5, big valve 6, small valve core assembly 7, spring 8, joint 9, it is characterized in that described big valve 6 and small valve core assembly 7 combine form open and close, the structure of secondary unloading that the big or small energy of overflow unloads respectively, big push rod 4 and the 3 chain unloadings actions of small valve core assembly; Valve seat 3 is designed to and the structure of isolating the guide sleeve one, and its end outer rim is provided with the sealed groove that valve pad is installed, and the other end inner chamber has the little gap of push rod pilot hole; Big valve (6) is that an end has the cylinder step to carry out the transition to the side cut cylindrical body, and its end is provided with a plurality of circular holes and communicates with inner chamber, and inner chamber is installed small valve core, movingly guiding; Small valve core assembly 7 comprises small valve core 10, little valve seat 11, little valve pad 12 and O RunddichtringO 13;

Big valve

6 and 10 of small valve cores can adopt taper to seal firmly, and big valve 6 one end inner chambers have tapered sealing surface, have the cone seal platform that is mated on the small valve core 10.

The utility model compared with prior art has following advantage: 1. start with unloading hydraulic pressure resonance from the liquid resistance that advances back of research minimizing valve, through test of many times, design the secondary unloading spool structure of Nover practical and have the whole valve seat of the little gap of push rod pilot hole; Its maximum characteristics be return into that the liquid resistance is little, flow is big, unloading transient impact pressure low (actual measurement is about 101.5% of nominal pressure), does not have unloading hydraulic pressure resonance phenomena.2. the sealing between small valve core and the big valve can soft seal (as Fig. 2), also can seal (as Fig. 3) firmly.

Fig. 1 is big flow Pilot operated check valve structural representation; Fig. 2 is a small valve core assembly soft seal B-B sectional view; Fig. 3 is a small valve core assembly soft seal A-A sectional view; Fig. 4 is that the small valve core assembly seals the C-C sectional view firmly; Fig. 5 is that the small valve core assembly seals the C-C left view firmly;

The utility model is used for the locking of hydraulic support column active chamber, little valve pad is installed in the little valve seat 11, under spring 8 effect near big valve seal, fluid pressure makes big valve 6 and small valve core assembly 7 pressure springs 8 during feed liquor, open feed pathway, after the pressure balance under spring 8 effect small valve core close voluntarily with big valve 6, make the locking of column active chamber, when needs move frame, at unloading chamber feed flow, the piston that promotes push rod 4 backs down small valve core and finishes the one-level unloading, and when active chamber pressure dropped to certain value, push rod moved on and opens big valve 6 realization fast dischargings.Small valve core assembly 7 was closed under spring 8 power effects voluntarily with big valve 6 after the hydraulic control mouth stopped feed flow.The outer end of joint 9 is provided with the safe operation that the interface that safety valve is installed can ensure column with safety valve.

Now developed three kinds of new products of 200L/min, 300L/min, 400L/min flow, detected every performance through national support apparatus in coal mine quality supervision and test center and meet industry standard MT419-1995 relevant requirements fully.Can also design series product such as 630 liters, 800 liters by this principle.

Claims

1. one kind big flow Pilot operated check valve, form by valve body (1), top stem casing (2), valve seat (3), big push rod (4), valve pad (5), big valve (6), small valve core assembly (7), spring (8), joint (9), it is characterized in that described big valve (6) and small valve core assembly (7) combine form open and close, the structure of secondary unloading that the big or small energy of overflow unloads respectively, big push rod (4) and the chain unloading action of small valve core assembly (3).

2. as claims 1 described big flow Pilot operated check valve, it is characterized in that described valve seat (3) is designed to and the structure of isolating the guide sleeve one, its end outer rim is provided with the sealed groove that valve pad is installed, and the other end inner chamber has the little gap of push rod pilot hole.

3. as claims 1 described big flow Pilot operated check valve, it is characterized in that described big valve (6) is that an end has the cylinder step to carry out the transition to the side cut cylindrical body, its end is provided with a plurality of circular holes and communicates with inner chamber, and inner chamber is installed small valve core, movingly guiding.

4. as any one described big flow Pilot operated check valve in claims 1 to 3, it is characterized in that described small valve core assembly (7) comprises small valve core (10), little valve seat (11), little valve pad (12) and " O " RunddichtringO (13).

5. as claims 1 described big flow Pilot operated check valve, it is characterized in that to adopt taper to seal firmly between described big valve (6) and small valve core (10), big valve (6) one end inner chambers have tapered sealing surface, have the cone seal platform that is mated on the small valve core (10).