CN205990922U - Column pilot operated check valve - Google Patents

Abstract

This utility model is related to a kind of column pilot operated check valve，Including valve body，It is provided with valve pocket in valve body，The Pb mouth being connected with valve pocket is provided with valve body、Pb1 mouth、Pa mouth、Pa1 mouth、A mouth、A1 mouth、A2 mouth，One end of valve pocket is provided with joint，One end of joint is provided with Pb2 mouth，The other end of joint is provided with delivery hole，The other end of valve pocket is provided with end bell and spigot joint，It is provided with screw plug on the bell and spigot joint of end，It is provided with core assembly in valve pocket，Core assembly includes valve pocket、Push rod，It is provided with piston on the left end of push rod，Piston is arranged in valve pocket，It is provided with big spring between corresponding piston and the interior land of valve pocket on push rod，The right-hand member of push rod sequentially passes through valve pocket、End cap joint and being arranged in screw plug，The right-hand member of valve pocket is conflicted on end cap joint，Big valve core and small valve core are provided with push rod，On push rod, at the right side of corresponding small valve core, little spring is set.This utility model has the advantages that compact conformation, sealing property reliability, dependable performance, long service life.

Description

Column hydraulic control check valve

technical field

The utility model belongs to the technical field of hydraulic equipment control, in particular to a column hydraulic control check 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-scale supports has become more and more extensive. Large-scale supports urgently need a hydraulic control check valve with large flow rate and reliable performance to control the lifting. However, the structural design of the existing hydraulically controlled one-way valve is unreasonable, so that the hydraulically controlled one-way valve has the defects of unreliable sealing performance, short service life and unstable performance.

Contents of the invention

The purpose of the utility model is to overcome the defects of the prior art, and provide a column hydraulic control one-way valve with compact structure, reliable sealing performance, stable and reliable performance and long service life.

In order to achieve the above purpose, the utility model adopts a column hydraulic control one-way valve, including a valve body, a valve cavity is arranged in the valve body, and Pb port, Pb1 port, Pa port, Pa1 port and Pa1 port which are connected with the valve cavity are arranged on the valve body. Port, A port, A1 port, A2 port, one end of the valve chamber is provided with a joint, one end of the joint is provided with a Pb2 port, and the other end of the joint is provided with a fluid guide hole connected between the valve chamber and the Pb2 port, The other end of the valve cavity is provided with an end sleeve joint, and a screw plug is provided on the end sleeve joint. A valve core assembly is provided in the valve cavity. The valve core assembly includes a valve sleeve and a push rod. A piston is provided on the left end of the push rod. , the piston is set in the valve sleeve, and a large spring is arranged between the corresponding piston and the inner ring platform of the valve sleeve on the ejector rod. Pass through the valve sleeve and the end cover joint and be arranged in the screw plug. The right end of the valve sleeve is in contact with the end cover joint. The cone surface of the sleeve is sealed, and a small valve core is set on the right side of the corresponding large valve core on the ejector rod, and the small valve core is sealed with the cone surface of the large valve core, and a small spring is set on the right side of the ejector rod corresponding to the small valve core, and the small spring The two ends of each contradict respectively on the limit platform of small spool and end cover joint.

The beneficial effects of the utility model are: the column hydraulic control check valve has the advantages of compact structure, reliable sealing performance and long service life. The ejector rod of the hydraulic control check valve has an integrated structure, and the opening, closing and control of the hydraulic control check valve are well realized in dynamic unity, so that the hydraulic control check valve has high system integration and high reliability. , The advantages of long service life. The hydraulically controlled one-way valve adopts a combination of double spools, the small spool and the large spool are sealed by a small-diameter conical surface, and the ejector rod uses a small pressure to open the small spool, reducing the pressure fluctuations of the hydraulically controlled one-way valve opening and closing. Reduce the impact of high-pressure liquid, effectively protect the valve core assembly parts and hydraulic components.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the utility model.

Fig. 2 is the left side view of the utility model embodiment.

detailed description

As shown in Figures 1 and 2, the embodiment of the utility model is a column hydraulic control check valve, including a valve body 10, a valve cavity 11 is arranged inside the valve body 10, and a Pb port 12, Pb1 port 13, Pa port 14, Pa1 port 15, A port 16, A1 port 17, A2 port 18, one end of the valve cavity 11 is provided with a joint 21, and one end of the joint 21 is provided with a Pb2 port 211, the other end of the joint 21 is provided with a liquid guide hole 212 connected between the valve cavity 11 and the Pb2 port 211, the other end of the valve cavity 11 is provided with an end sleeve joint 22, and the end sleeve joint 22 is provided with a screw plug 23, A spool assembly 30 is arranged in the valve chamber 11, and the spool assembly 30 includes a valve sleeve 31 and a push rod 32. A piston 33 is arranged on the left end of the push rod 32, the piston 33 is arranged in the valve sleeve 31, and the push rod 32 A large spring 34 is arranged between the upper corresponding piston 33 and the inner ring platform 311 of the valve sleeve 31, and the two ends of the large spring 34 are in contact with the piston 33 and the inner ring platform 311 of the valve sleeve 31 respectively, and the right end of the push rod 32 is passed through in turn. Pass through the valve sleeve 31 and the end cover joint 22 and set it in the screw plug 23. The right end of the valve sleeve 31 is in contact with the end cover joint 22, and a large valve core is arranged on the right side of the corresponding valve sleeve 31 on the ejector rod 32. 35, the large valve core 35 is sealed with the cone surface of the valve sleeve 31, and the small valve core 36 is arranged on the right side of the corresponding large valve core 35 on the ejector rod 32, and the small valve core 36 is sealed with the cone surface of the large valve core 35, and the ejector rod 32 A small spring 37 is arranged on the right side corresponding to the small spool 36 , and the two ends of the small spring 37 are in contact with the limiting platform 221 of the small spool 36 and the end cover joint 22 respectively. The column hydraulic control check valve has the advantages of compact structure, reliable sealing performance and long service life. The ejector rod of the hydraulic control check valve has an integrated structure, and the opening, closing and control of the hydraulic control check valve are well realized in dynamic unity, so that the hydraulic control check valve has high system integration and high reliability. , The advantages of long service life. The hydraulically controlled one-way valve adopts a combination of double spools, the small spool and the large spool are sealed by a small-diameter conical surface, and the ejector rod uses a small pressure to open the small spool, reducing the pressure fluctuations of the hydraulically controlled one-way valve opening and closing. Reduce the impact of high-pressure liquid, effectively protect the valve core assembly parts and hydraulic components.

The working principle of the column hydraulic control check valve is: when the reversing valve supplies liquid to Pa port and Pa1 port, the spring force of the small spring is overcome under the action of hydraulic pressure, and the large valve core and small valve core are pushed open, and the working fluid flows from the valve The sleeve enters the lower chamber of the column through the A2 port or the A port and the A1 port to supply liquid, so that the column rises. When the column rises to the working resistance, the reversing valve stops the liquid supply. Under the action of the hydraulic pressure and the spring force, the large valve core and the valve The sleeve is tightly sealed and closed to ensure the continuous operation of the column. When the reversing valve supplies liquid to the Pb port, Pb1 port, and Pb2 port, the spring force of the large spring is overcome by the hydraulic pressure, the working fluid pushes the piston, and the piston pushes the ejector rod. First, the small valve core is opened, and then the large valve is opened. The core, the liquid flows back to the emulsion tank from port A, port A1, port A2 through port Pa and port Pa1 to achieve stable column drop. When the Pb port, Pb1 port, and Pb2 port stop supplying liquid, the piston resets, and the large and small valve cores reset to 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 entire hydraulic circuit and greatly enhances the reliability and life of the hydraulic control check valve.

Claims (1)

1. a kind of column pilot operated check valve, including valve body, is provided with valve pocket, valve body in valve body On be provided with the Pb mouth being connected with valve pocket, Pb1 mouth, Pa mouth, Pa1 mouth, A mouth, A1 Mouthful, A2 mouth it is characterised in that：One end of described valve pocket is provided with joint, and the one of joint End is provided with Pb2 mouth, and the other end of joint is provided with and is connected to leading between valve pocket and Pb2 mouth Fluid apertures, the other end of valve pocket is provided with end bell and spigot joint, and end bell and spigot joint is provided with screw plug, valve pocket Inside it is provided with core assembly, core assembly includes valve pocket, push rod, on the described left end of push rod Be provided with piston, piston is arranged in valve pocket, on push rod the interior land of corresponding piston and valve pocket it Between be provided with big spring, the two ends of big spring are conflicted respectively in the interior land of piston and valve pocket, The right-hand member of push rod sequentially passes through valve pocket, end cap joint and is arranged in screw plug, described valve pocket Right-hand member is conflicted on end cap joint, and push rod is provided with big valve core, greatly at the right side of corresponding valve pocket Valve element and valve pocket conical surface seal, push rod arranges small valve core, little valve at the right side of corresponding big valve core Little spring is set at core and big valve core conical surface seal, and the right side of corresponding small valve core on push rod, little Conflict respectively on the limiting stand with end cap joint for the small valve core in the two ends of spring.