CN202832580U - A Medium Flow Hydraulic Control Check Valve - Google Patents

Abstract

The utility model discloses a medium flow liquid accuse check valve, including valve body, valve barrel, case, disk seat, ejector pin and joint, be equipped with the liquid chamber on the disk seat, the head of ejector pin stretches into the liquid chamber of valve seat, still overlaps on the ejector pin and has a return spring, is equipped with the external screw thread on the head pole body of ejector pin, the position that is close to the liquid chamber in the inside of disk seat is equipped with the stopper, is equipped with the through-hole on this stopper, is equipped with the internal thread that matches with the external screw thread on the ejector pin on the inner wall of through-hole, and return spring one end is supported on the stopper, and the other end supports on the ejector pin; 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 Medium Flow Hydraulic Control Check Valve

technical field

The utility model relates to a hydraulic component in a hydraulic circuit of a coal mine hydraulic support, in particular to a medium flow hydraulically controlled one-way valve.

Background technique

Since the beginning of fully mechanized mining in coal mines, due to the different coal mining environments, there have been stricter requirements on hydraulic supports and supporting equipment. At present, the flow rate of the hydraulic control check valve is small, and the hydraulic shock is large during unloading, which will reduce the service life of each component and the overall life of the valve. The sealing surface is sealed with a valve pad or polyoxymethylene and other materials, and there will inevitably be fine coal slag on the coal mine working surface Or other foreign matter enters the hydraulic valve. When the hydraulic control valve is opened and closed, impurities will be squeezed on the soft seal, causing liquid leakage and stringing. The adaptability and service life are not ideal. In addition, the traditional hydraulic control The one-way valve is composed of many structural parts. To replace the seals, many parts need to be disassembled, which is extremely inconvenient underground. Many problems plague the normal work and production of the underground hydraulic support.

Utility model content

The technical problem to be solved by the utility model is to provide a medium-flow hydraulic control check valve with simple installation and convenient maintenance.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a medium-flow hydraulic control check valve, including a valve body, a valve sleeve, a valve core, a valve seat, a push rod and a joint. The valve seat is set on the outside of the ejector rod, and the head of the ejector rod extends into the liquid passage chamber of the valve seat. The valve core is built in the valve sleeve, and there is also a spring between the valve core and the valve sleeve. Push the spool so that the head of the spool is in sealing connection with the valve seat at the port connected to the liquid passage chamber on the valve seat, and a return spring is set on the ejector rod, and an outer valve is arranged on the head rod of the ejector rod. screw thread, a limit block is provided inside the valve seat close to the liquid chamber, a through hole is provided on the limit block, and an external thread on the through hole is provided on the inner wall of the through hole Internal thread, one end of the return spring is against the limit block, and the other end is against the push rod; there are six working ports for hydraulic oil to enter and exit on the valve body, two of which are connected to the joint, and two The working port communicates with the liquid passage chamber of the valve seat, and the two working ports communicate with the liquid inlet channel provided on the valve sleeve.

There is a hard seal connection between the valve core and the valve seat.

The head of the valve core is a truncated cone structure, and the ejector rod and the valve core start to contact at the port of the valve seat.

The utility model adopts the above-mentioned technical scheme. Compared with the prior art, the valve seat and the ejector rod are threaded, and the ejector rod can be screwed into the liquid passage chamber in the valve seat to form a plug-in hydraulic component, so that the entire hydraulic control The system integration of the check valve is high, which is convenient for the installation and maintenance of the hydraulic control check valve, that is, the installation is simple and the maintenance is convenient. The hydraulic control check valve can be repaired directly by replacing the cartridge hydraulic components.

Description of drawings

Fig. 1 is the structural representation of hydraulic control check valve of the present utility model;

The marks in the above figures are: 1. valve sleeve; 2. valve core; 3. valve body; 4. valve seat; 5. return spring; 6. ejector rod; 7. liquid passage chamber; 8. port; , limit block; 10, liquid inlet channel; 11, connector; 12, spring.

Detailed ways

As shown in Figure 1, it is a medium-flow hydraulic control check valve of the present invention, which includes a valve body 3, a valve sleeve 1, a valve core 2, a valve seat 4, a push rod 6 and a joint 11, and the valve seat 4 is provided with There is a liquid passage chamber 7, the valve seat 4 is set on the outside of the ejector rod 6, and the head of the ejector rod 6 extends into the liquid passage chamber 7 of the valve seat 4, the valve core 2 is built in the valve sleeve 1, and the valve core 2 There is also a spring 12 between the valve sleeve 1, the spring 12 pushes the valve core 2 so that the head of the valve core 2 is in sealing connection with the valve seat 4 at the port 8 communicating with the liquid chamber 7 on the valve seat 4, and at the top The rod 6 is also covered with a return spring 5, and the head rod body of the push rod 6 is provided with an external thread, and a limit block 9 is provided at a position close to the liquid chamber 7 inside the valve seat 4. The block 9 is provided with a through hole, and the inner wall of the through hole is provided with an internal thread that matches the external thread on the push rod 6. One end of the return spring 5 is against the limit block 9, and the other end is against the push rod. 6; on the valve body 3, there are six working ports for hydraulic oil to enter and exit, such as working port A, working port PA and working port PB in the figure, of which two working ports PB are connected to joint 11, and two working ports PA communicates with the liquid passage chamber 7 of the valve seat 4, and the two working ports A communicate with the liquid inlet channel 10 provided on the valve sleeve 1, and the valve sleeve 1 has a working port A'. Compared with the prior art, the valve seat 4 and the ejector rod 6 are threaded, and the ejector rod 6 can be screwed into the liquid passage chamber 7 in the valve seat 4 to form a plug-in hydraulic assembly, so that the entire hydraulic control check valve The system has a high degree of integration, which is convenient for the installation and maintenance of the hydraulic control check valve, that is, the installation is simple and the maintenance is convenient. The hydraulic control check valve can be repaired directly by replacing the plug-in hydraulic components.

In addition, the valve core 2 and the valve seat 4 of the hydraulic control check valve are connected by a hard seal. The valve core 2 is made of metal material. Compared with the seal of soft material, the hard seal not only has good sealing performance, but also can withstand ultra-high pressure. , The one-way valve has a long service life. As shown in Figure 1, the head of the valve core 2 is a frustum of cone structure, the head of the valve core 2 no longer extends into the liquid cavity 7, and the ejector rod 6 and the valve core 2 are only at the port 8 of the valve seat 4 At the beginning of contact, the structure of the spool 2 is simpler, and the overall structure of the hydraulic control check valve is more compact.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned methods, as long as various insubstantial improvements are made by adopting the method concept and technical solutions of the utility model, or Directly applying the ideas and technical solutions of the utility model to other occasions without improvement is within the protection scope of the utility model.

Claims (3)

1. flow pilot operated check valve in a kind, comprise valve body, valve pocket, spool, valve seat, push rod and joint, 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, 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, it is characterized in that: the head shaft at described push rod is provided with external screw thread, be provided with limited block in the inside of described 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, described return spring one end is against on the limited block, and the other end is against on the push rod; Be provided with six working holes for hydraulic oil turnover at described valve body, wherein two working holes are communicated with described joint, and two working holes are communicated with the sap cavity of crossing of valve seats, and the feed pathway that arranges on two working holes and the described valve pocket is communicated with.

2. middle flow pilot operated check valve according to claim 1 is characterized in that: between described spool and the described valve seat for firmly being tightly connected.

3. middle flow pilot operated check valve according to claim 1 and 2, it is characterized in that: the head of described spool is the frustum structure, described push rod begins to contact in the port of described valve seat with spool.

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