CN202832603U

CN202832603U - A New Kind of Medium Flow Hydraulic Control Check Valve

Info

Publication number: CN202832603U
Application number: CN 201220464861
Authority: CN
Inventors: 李福洪; 朱述群; 郑建宝; 周建松; 郑利荣; 刘崇鑫; 谢瑞
Original assignee: Julong Group Wuhu Xinglong Hydraulic Co Ltd
Current assignee: Hongda Intelligent Machinery Co ltd
Priority date: 2012-09-13
Filing date: 2012-09-13
Publication date: 2013-03-27
Anticipated expiration: 2022-09-13

Abstract

The utility model discloses a novel well flow liquid accuse check valve, which comprises a valve body, the valve barrel, a valve core, disk seat and ejector pin, be equipped with the sap cavity on the disk seat, the head of ejector pin stretches into the sap cavity of crossing of disk seat, be formed with the oil storage chamber between the tip of ejector pin and the tip inner wall of valve body, the position that is close to the sap cavity in the inside of disk seat is equipped with the stopper, the ejector pin pass this stopper and with stopper threaded connection, be equipped with the three working port that supplies the hydraulic oil business turn over on the valve body, one of them working port intercommunication oil storage chamber, the sap cavity of crossing of a working port intercommunication disk seat, the inlet channel intercommunication that sets up on a working port and the valve barrel. Compared with the prior art, disk seat and ejector pin are threaded connection, and the ejector pin can be screwed into the liquid cavity of crossing in the disk seat, forms the hydraulic component of cartridge formula for the system integration of whole pilot operated check valve is higher, and the installation and the maintenance of the pilot operated check valve of being convenient for, install simple, easy maintenance promptly, directly just can restore this pilot operated check valve through changing cartridge formula hydraulic component.

Description

A kind of novel middle flow pilot operated check valve

Technical field

The utility model relates to the Hydraulic Elements in the coal mine hydraulic supporting hydraulic circuit, and specifically, the utility model relates to a kind of novel middle flow pilot operated check valve.

Background technology

Since coal mine fully-mechanized mining begins, because the difference of various coal mining environment has had stricter requirement to hydraulic support and supporting equipment.The middle flow pilot operated check valve flow that uses at present is little, during off-load hydraulic shock large, each component and bulk life time to valve all can reduce, and hydraulic control one-way valve is combined by a lot of structural members, change seal and will dismantle a lot of parts, the very inconvenience in the down-hole, a lot of problems are perplexing the normal operation production of underground hydraulic support frame.

The utility model content

Technical problem to be solved in the utility model provides a kind of novel middle flow pilot operated check valve simple and easy to maintenance of installing.

In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of novel middle flow pilot operated check valve, comprise valve body, valve pocket, spool, valve seat and push rod, valve seat was provided with sap cavity, valve seat is enclosed within the outside of push rod, the head of push rod also stretches in the excessively sap cavity of valve seat, between the inner wall of end of the end of push rod and valve body, be formed with shoe cream room, spool is built in the valve pocket, between spool and valve pocket, also be provided with spring, spring promotes spool makes the port with cross sap cavity connection of head on valve seat of spool be connected with valve base sealing, also cover has return spring on push rod, head shaft at push rod is provided with external screw thread, be provided with limited block in the inside of valve seat near the position of crossing sap cavity, be provided with through hole at this limited block, the inwall of through hole be provided with push rod on the suitable internal thread of external screw thread, return spring one end is against on the limited block, and the other end is against on the push rod; Be provided with three working holes for hydraulic oil turnover at valve body, one of them working hole is communicated with shoe cream room, and a working hole is communicated with the sap cavity of crossing of valve seat, and the feed pathway that arranges on working hole and the valve pocket is communicated with.

Port at described valve seat is provided with valve pad, and described spool and valve pad are tightly connected.

The head of described spool is the frustum structure, and described push rod begins to contact in the port of described valve seat with spool.

The utility model adopts technique scheme, compared with prior art, valve seat and push rod are for being threaded, push rod can screw in crossing in the sap cavity in the valve seat, form the hydraulic package of plug-in, so that the level of integrated system of whole hydraulic control one-way valve is higher, be convenient to installation and the maintenance of hydraulic control one-way valve, namely install simply, easy to maintenance, directly just can repair this hydraulic control one-way valve by changing plug-in hydraulic pressure assembly.

Description of drawings

Fig. 1 is the structural representation of hydraulic control one-way valve of the present utility model;

Mark among the above-mentioned figure is: 1, valve pocket; 2, spool; 3, valve body; 4, valve seat; 5, return spring; 6, push rod; 7, cross sap cavity; 8, port; 9, limited block; 10, feed pathway; 11, valve pad; 12, spring; 13, shoe cream room.

The specific embodiment

Be illustrated in figure 1 as a kind of middle flow pilot operated check valve of the present utility model, it comprises valve body 3, valve pocket 1, spool 2, valve seat 4 and push rod 6, valve seat 4 was provided with sap cavity 7, valve seat 4 is enclosed within the outside of push rod 6, the head of push rod 6 also stretches in the excessively sap cavity 7 of valve seat 4, between the inner wall of end of the end of push rod 6 and valve body 3, be formed with shoe cream room 13, spool 2 is built in the valve pocket 1, between spool 2 and valve pocket 1, also be provided with spring 12, spring 12 promotes spools 2 is tightly connected port 8 places and the valve seat 4 that with mistake sap cavity 7 are communicated with of head on valve seat 4 of spool 2, also cover has return spring 5 on push rod 6, head shaft at push rod 6 is provided with external screw thread, inside at described valve seat 4 is provided with limited block 9 near the position of crossing sap cavity 7, be provided with through hole at this limited block 9, the inwall of through hole be provided with push rod 6 on the suitable internal thread of external screw thread, return spring 5 one ends are against on the limited block 9, the other end is against on the push rod 6; Be provided with three working holes that pass in and out for hydraulic oil at valve body 3, such as the working hole A among the figure, working hole PA and working hole PB, wherein working hole PB is communicated with shoe cream room 13, working hole PA is communicated with the excessively sap cavity 7 of valve seat 4, the feed pathway 10 that arranges on working hole A and the valve pocket 1 is communicated with, and has working hole A' on the valve pocket 1.Compared with prior art, valve seat 4 and push rod 6 are for being threaded, push rod 6 can screw in crossing in the sap cavity 7 in the valve seat 4, form the hydraulic package of plug-in, so that the level of integrated system of whole hydraulic control one-way valve is higher, be convenient to installation and the maintenance of hydraulic control one-way valve, namely install simply, easy to maintenance, directly just can repair this hydraulic control one-way valve by changing plug-in hydraulic pressure assembly.

In addition, as shown in Figure 1, this hydraulic control one-way valve also is provided with valve pad 11 at port 8 places of valve seat 4, and spool 2 is tightly connected with valve pad 11, to strengthen sealing performance.In order further to strengthen sealing performance, can be directly for firmly being tightly connected between spool 2 and the valve seat 4, adopt metal material to make spool 2, and to adopt the vacuum hardening technology, and to finish grind again after quenching, hardness is high, sealing with respect to softwood matter, firmly seal not only good seal performance, go back ability super-pressure, the one way valve long service life.As shown in Figure 1, the head of spool 2 and be the frustum structure, the head of spool 2 no longer stretched in the

sap cavity

7, and 2 port 8 places at valve seat 4 of push rod 6 and spool begin to contact, and the structure of spool 2 is simpler, the more compact structure of hydraulic control one-way valve integral body.

The above has carried out exemplary description to the utility model by reference to the accompanying drawings; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technical scheme carry out; or without improving design of the present utility model and technical scheme are directly applied to other occasion, all within protection domain of the present utility model.

Claims

1. A new type of medium-flow hydraulic control check valve, including a valve body, a valve sleeve, a valve core, a valve seat and a ejector rod. The head extends into the liquid passage chamber of the valve seat, and an oil storage chamber is formed between the end of the ejector rod and the inner wall of the end of the valve body. There is also a spring, which pushes the spool so that the head of the spool is in sealing connection with the valve seat at the port that communicates with the liquid chamber on the valve seat, and a return spring is also set on the push rod, which is characterized in that: The head shaft of the push rod is provided with external threads, and a limit block is provided inside the valve seat near the liquid chamber, a through hole is provided on the limit block, and a through hole is provided on the inner wall of the through hole. There is an internal thread matching the external thread on the ejector rod, one end of the return spring is against the limit block, and the other end is against the ejector rod; there are three valves on the valve body for hydraulic oil to enter and exit One of the working ports is connected to the oil storage chamber, one of the working ports is connected to the liquid passage chamber of the valve seat, and one of the working ports is connected to the liquid inlet passage provided on the valve sleeve.

2. The novel medium-flow hydraulic control check valve according to claim 1, characterized in that: a valve pad is provided at the port of the valve seat, and the valve core is in sealing connection with the valve pad.

3. The new medium flow hydraulic control check valve according to claim 1 or 2, characterized in that: the head of the valve core is a frustum of cone structure, and the ejector rod and the valve core are at the port of the valve seat. start contact.