CN202560256U - A plug-in column hydraulic control check valve - Google Patents

Abstract

The utility model discloses a plug-in column hydraulic control one-way valve, including a joint and a valve body. A push rod is arranged in the valve body, a large spring is arranged outside the push rod, the push rod is fixed in a liquid inlet valve sleeve, the inner side of the liquid inlet valve sleeve contacts with a large valve core to form a metal ring line sealing pair, and the inside of the large valve core and a small valve core form a metal ring line sealing pair; a small spring is arranged inside the small valve core, the small valve core contacts with the circumference of a screw sleeve, and a screw plug is installed on the screw sleeve. The utility model has a simple structure, high system integration, strong reliability, long service life, and is easy to install and maintain. The column hydraulic control one-way valve can be repaired directly by replacing the plug-in hydraulic valve core assembly, which is simple, convenient and reliable.

Description

A plug-in column hydraulic control check valve

technical field

The utility model relates to a one-way valve, in particular to a plug-in type column hydraulic control 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. In recent years, the coal mining industry has gradually improved, and the application of large supports has become more and more extensive. As a manufacturer with more than 30 years of experience in the production of hydraulic support valves, through independent development, it has launched a reliable, long service life, maintenance-free The convenient column hydraulic control one-way valve adopts the pilot unloading method, which can adapt to the working conditions of high pressure and large flow. At the same time, each sealing contact surface adopts metal hard seal structure, which greatly prolongs the service life. The components are integrated into one body through threaded connection to realize a plug-in structure, and the maintenance is quick and convenient. At present, the domestic column control hydraulic control valve has a small flow rate and a large hydraulic shock during unloading, which will reduce the service life of various parts and the overall life of the valve. The sealing surface is sealed with valve pads or polyoxymethylene. It is inevitable that there will be Small coal slag or other foreign matter enters the hydraulic valve, and when the hydraulic control valve is opened and closed, impurities will be squeezed on the soft seal, causing liquid leakage and stringing, and the adaptability and service life are not ideal. In addition, the traditional The valve group 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 purpose of the utility model is to provide a plug-in column hydraulic control check valve to solve the problems of high hydraulic impact, low service life and adaptability and difficult maintenance of the column hydraulic control check valve in the prior art.

In order to achieve the above object, the technical solution adopted in the utility model is:

A plug-in column hydraulic control one-way valve, including a joint, a valve body, a ejector rod arranged in the valve body, a large spring on the outside of the ejector rod, the ejector rod is fixed in the liquid inlet valve sleeve, and the inner side of the liquid inlet valve sleeve is connected to the large spring. The spool contacts to form a metal ring line seal pair, and the inside of the large spool and the small spool form a metal ring line seal pair; the inside of the small spool is provided with a small spring, and the small spool is in contact with the circumference of the screw sleeve. Blocking.

The utility model has the advantages of simple structure, high system integration, strong reliability, long service life, easy installation and maintenance, and the column hydraulic control check valve is repaired directly by replacing the plug-in hydraulic valve core assembly, which is simple, convenient and reliable.

Description of drawings

Fig. 1 is the main sectional view of the utility model.

Fig. 2 is a top sectional view of the utility model.

Detailed ways

Below in conjunction with embodiment and accompanying drawing, the utility model is described again.

A plug-in column hydraulically controlled one-way valve, including a joint 1 and a valve body 2, the valve body 2 is provided with a push rod 3, and a large spring 4 is arranged on the outside of the push rod 3, and the push rod 3 is fixed on the liquid inlet valve sleeve 5 Inside, the inner side of the liquid inlet valve sleeve 5 is in contact with the large valve core 6 to form a metal ring line sealing pair, and the inside of the large valve core 6 and the small valve core 7 form a metal ring line sealing pair; the inside of the small valve core 7 is provided with a small spring 8, and the small The spool 7 is in contact with the circumference of the screw sleeve 9, and a screw plug 10 is installed on the screw sleeve 9.

Referring to Figure 1, the A' working port is sealed on the interface of the lower chamber of the column through four bolts, the PA port is connected to the working fluid chamber of the reversing valve, and PA' can be connected to the PA interface of the adjacent column hydraulic control check valve. Synchronously control the lifting of the column, the PB terminal is connected to the working fluid chamber opposite to the reversing valve corresponding to PA, PB' can also be connected to the adjacent column hydraulic control check valve PB interface to realize synchronous control of the lowering column, and the B' interface is connected to the column cavity. Port A is connected to a pressure gauge or pressure sensor, and the other end is plugged or connected to other working fluid chambers.

When the working conditions need to control the rise of the column, the working fluid chamber connected to the PA interface of the reversing valve is opened for liquid supply, the high-pressure working fluid enters the PA port, and the large and small valve cores are opened. After entering, the working fluid enters the bottom of the column through the A' flat sealing port cavity, so that the column rises, when the PA end stops supplying liquid, the large and small valve cores form a metal hard seal pair with the liquid inlet valve sleeve under the pressure of the return spring to keep the working fluid in the lower cavity of the column stable. When the working conditions need to control the column down, the working fluid chamber connected to the PB interface of the reversing valve opens to supply liquid, and part of the high-pressure working fluid entering from the PB end enters the upper chamber of the column through the B' port to lower the column, and the other part makes the piston move first. Open the pilot small spool for unloading, and then open the large spool so that the liquid in the lower chamber of the column flows into the return line through PA to achieve a stable drop of the column. When the working fluid at the PB end stops supplying liquid, the piston resets and the large and small spools reset Keep the column in a stable working condition. Because of the high pressure in the lower chamber of the column, the cushioning effect protects the internal parts of the hydraulic control check valve very well, greatly enhancing the reliability and life of the valve.

Because the hydraulic assembly of the utility model adopts a metal hard seal structure, the service life and adaptability of the hydraulic control check valve are greatly improved, the pilot unloading method improves reliability, and the plug-in structure makes maintenance more convenient.

Claims (1)

1. A plug-in column hydraulically controlled one-way valve, including a joint and a valve body, is characterized in that: the valve body is provided with a push rod, and there is a large spring outside the push rod, and the push rod is fixed in the liquid inlet valve sleeve, The inner side of the liquid valve sleeve is in contact with the large valve core to form a metal ring line sealing pair, and the inside of the large valve core is in contact with the small valve core to form a metal ring line sealing pair; the inside of the small valve core is provided with a small spring, and the small valve core is in contact with the circumference of the screw sleeve. A screw plug is installed on the screw sleeve.

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