Integrated one-way valve for coal caving

Abstract

The utility model discloses a coal caving integrated one-way valve, which comprises a valve body and a valve core assembly, the valve core assembly comprises a liquid inlet valve sleeve, a valve sleeve joint, a valve core, an ejector rod, a large spring and a spring, the ejector rod is movably arranged in the liquid inlet valve sleeve, the valve core is movably arranged in the valve sleeve joint, and the liquid inlet valve sleeve is in threaded connection with the valve sleeve joint. According to the integrated coal caving one-way valve, the two valve element assemblies form a plug-in type structure, so that the system integration degree of the whole integrated coal caving one-way valve is high, the integrated coal caving one-way valve is convenient to install and maintain, installation is simple, maintenance is convenient, and the integrated coal caving one-way valve can be repaired by directly replacing the plug-in type valve element assemblies.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fully mechanized hydraulic support in coal mine, specifically, the utility model relates to a coal releasing integrated one-way valve. BACKGROUND

[0002] The hydraulic support system cooperates with the coal mining machine and the scraper conveyor, can realize the comprehensive mechanization of the coal falling, supporting and transporting of the working face, in the prior art, the coal releasing action of the hydraulic support is generally as follows: the plug plate is recovered at the same time when the end beam acts, in order to meet this operation, the hydraulic system of the hydraulic support adopts the design of two hydraulic one-way valves and an alternating valve to achieve the purpose of locking and linkage, this design method occupies a large installation space and uses more connecting pipelines, in the case that the support space is relatively compact, too many valve parts and too complex pipelines will cause inconvenience to the support layout and maintenance, and cause certain obstruction to the coal releasing sight.

[0003] The Chinese patent with the application number 202020438750.8 discloses a coal releasing integrated one-way valve, which comprises a valve body, a plug plate valve core assembly, an end beam valve core assembly, an alternating valve core assembly and an end beam piston assembly, the alternating valve core has a linkage position for simultaneously controlling the actions of the plug plate valve core and the end beam valve core, when the end beam and the plug plate need to act at the same time, PA2 port is supplied with liquid, the liquid overcomes the action force of the alternating spring, drives the alternating valve core to move towards PA1 port, makes the first liquid passage communicate with PA2 port, the plug plate valve core moves from the closed position to the communicating position under the action of the hydraulic pressure, the liquid flows into the upper chamber of the plug plate jack through A1 port, so that the plug plate jack is recovered; at the same time, the end beam piston is driven to move from the closed position to the communicating position under the action of the hydraulic pressure of the liquid flowing through the second liquid passage, the liquid in the lower chamber of the end beam jack flows back to the oil tank through B1 port and PB port in turn, and the end beam jack completes the recovery action. The above structure has fewer components, simple structure, low production cost and convenient post-maintenance.

[0004] It is desired to provide an improved coal releasing integrated one-way valve, especially about how to improve the integration degree, facilitate installation and maintenance. UTILITY MODEL CONTENT

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a coal releasing integrated one-way valve, which aims to improve the integration degree, facilitate installation and maintenance.

[0006] In order to achieve the above object, the utility model adopts the technical scheme that is: the coal discharge integrated check valve, including valve body, first valve core subassembly and second valve core subassembly, the first valve core subassembly includes first liquid inlet valve sleeve, first valve sleeve joint, first valve core, first top rod, first big spring that is arranged in the first liquid inlet valve sleeve and is used for exerting elastic force to the first top rod and first small spring that is arranged in the first valve sleeve joint and is used for exerting elastic force to the first valve core, the first top rod is arranged in the first liquid inlet valve sleeve and is movable, the first valve core is arranged in the first valve sleeve joint and is movable, the first liquid inlet valve sleeve and the first valve sleeve joint are screw connection;

[0007] The second valve core subassembly includes second liquid inlet valve sleeve, second valve sleeve joint, second valve core, second top rod, second big spring that is arranged in the second liquid inlet valve sleeve and is used for exerting elastic force to the second top rod and second small spring that is arranged in the second valve sleeve joint and is used for exerting elastic force to the second valve core, the second top rod is arranged in the second liquid inlet valve sleeve and is movable, the second valve core is arranged in the second valve sleeve joint and is movable, the second liquid inlet valve sleeve and the second valve sleeve joint are screw connection.

[0008] The first small spring is rectangular spring, and one end of the first small spring is inserted into the interior of the first valve core, and the first small spring is clamped between the first valve core and the first valve sleeve joint.

[0009] The first valve core is provided with a liquid passing hole, and the liquid passing hole communicates the inner cavity of the first valve core with the inner cavity of the first valve sleeve joint.

[0010] The first spring is a cylindrical helical spring.

[0011] The second small spring is rectangular spring, and one end of the second small spring is inserted into the interior of the second valve core, and the second small spring is clamped between the second valve core and the second valve sleeve joint.

[0012] The second valve core is provided with a liquid passing hole, and the liquid passing hole communicates the inner cavity of the second valve core with the inner cavity of the second valve sleeve joint.

[0013] The second spring is a cylindrical helical spring.

[0014] The coal discharge integrated check valve of the utility model, two valve core subassemblies form plug-in structure, so that the system integration degree of the whole coal discharge integrated check valve is higher, and the installation and maintenance of the coal discharge integrated check valve are convenient, namely, simple installation, convenient maintenance, and the coal discharge integrated check valve can be repaired directly by replacing the plug-in valve core subassembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present specification includes the following drawings, and the shown contents are respectively:

[0016] Figure 1is sectional view of coal discharge integrated check valve of the utility model;

[0017] Figure 2 is sectional view of first valve core assembly;

[0018] Figure 3 is sectional view of second valve core assembly;

[0019] Figure 4 is function diagram of coal discharge integrated check valve of the utility model;

[0020] Marked as in the drawing: 1, first valve sleeve joint;2, first small spring;3, first valve core;4, first valve seat;5, first big spring;6, first top rod;7, first liquid inlet valve sleeve;8, valve body;9, first liquid passage;10, second liquid passage;11, third liquid passage;12, second valve sleeve joint;13, second small spring;14, second valve core;15, second valve core;16, second big spring;17, second top rod;18, second liquid inlet valve sleeve;19, fourth liquid passage;20, fifth liquid passage;21, sixth liquid passage. DETAILED DESCRIPTION

[0021] The specific embodiments of the utility model are further explained in detail by the description of the embodiments with reference to the drawings, the purpose is to help the technical personnel in the field to have more complete, accurate and deep understanding to the conception, technical scheme of the utility model, and help to implement.

[0022] As Figures 1 to 4 shown, the utility model provides a kind of coal discharge integrated check valve, including valve body 8, first valve core assembly and second valve core assembly, first valve cavity and second valve cavity are arranged in valve body 8 interior, the axis of first valve cavity and the axis of second valve cavity are parallel, first valve core assembly is installed in first valve cavity, second valve core assembly is installed in second valve cavity.

[0023] As Figure 2 shown, first valve core assembly includes first liquid inlet valve sleeve 7, first valve sleeve joint 1, first valve seat 4, first valve core 3, first top rod 6, first big spring 5 for being arranged in first liquid inlet valve sleeve 7 and being used to exert elastic force to first top rod 6 and first small spring 2 for being arranged in first valve sleeve joint 1 and being used to exert elastic force to first valve core 3, first top rod 6 is movably arranged in first liquid inlet valve sleeve 7, first valve core 3 is movably arranged in first valve sleeve joint 1, first liquid inlet valve sleeve 7 and first valve sleeve joint 1 are screw connection.

[0024] As Figure 2As shown, the third liquid passage 11 is arranged on the first liquid inlet valve sleeve 7, and the third liquid passage on the first liquid inlet valve sleeve 7 is communicated with the liquid inlet hole arranged on the valve body 8. The second liquid passage 10 is arranged on the first valve sleeve joint 1, and the second liquid passage on the first valve sleeve joint 1 is communicated with the liquid outlet hole arranged on the valve body 8. The first liquid passage 9 is arranged on the first valve core 3, and the first liquid passage 9 is arranged in plurality, and the first liquid passage 9 is communicated with the inner cavity of the first valve core 3 and the inner cavity of the first valve sleeve joint 1.

[0025] As shown in Figure 1 and Figure 2 , the first valve sleeve joint 1 is inserted into the first valve cavity of the valve body 8 and is threadedly connected with the valve body 8, the first liquid inlet valve sleeve 7 is located in the first valve cavity of the valve body 8, the first liquid inlet valve sleeve 7 is provided with an unloading cavity, the head of the first top rod 6 extends into the unloading cavity of the first liquid inlet valve sleeve 7, and the tail of the first top rod 6 is located inside the first liquid inlet valve sleeve 7. The first valve core 3 is built in the first valve sleeve joint 1, the first valve seat 4 is fixedly arranged between the first liquid inlet valve sleeve 7 and the first valve sleeve joint 1, the head of the first valve core 3 is sealingly connected with the first valve seat 4, and the first small spring 2 is further arranged between the first valve core 3 and the first valve sleeve joint 1. The first small spring 2 pushes the first valve core 3 to slide in the first valve sleeve joint 1, so that the head of the first valve core 3 can be in contact with the first top rod 6. One end of the first small spring 2 is inserted into the inner cavity of the first valve core 3, and the other end of the first small spring 2 is embedded into the positioning groove arranged on the inner wall surface of the first valve sleeve joint 1, so as to realize the guidance and positioning of the first small spring 2. The first small spring 2 is a rectangular spring. Under the same space condition, the rectangular cross section has greater rigidity than the spiral compression spring, and has small volume, so that the occupied space can be reduced, the one-way valve can be closed in time, and the working reliability can be improved.

[0026] As shown in Figure 2 , the first top rod 6 moves towards the first valve core 3 under the push of the emulsion liquid entering the valve body 8 from the working port, first contacts the first valve core 3, pushes the first valve core 3 to move, and the first valve core 3 is separated from the first valve seat 4. At this time, the inner cavity of the first liquid inlet valve sleeve 7 is communicated with the inner cavity of the first valve sleeve joint 1. The head of the first top rod 6 is provided with external threads, the inside of the first liquid inlet valve sleeve 7 is provided with a first limiting block adjacent to the unloading cavity, the first limiting block is provided with a through hole, the inner wall of the through hole is provided with internal threads matched with the external threads on the first top rod 6, and the first large spring 5 is further sleeved on the first top rod 6. The first large spring 5 is a cylindrical spiral spring and a compression spring. One end of the first large spring 5 abuts against the first limiting block, and the other end abuts against the tail of the first top rod 6. The first liquid inlet valve sleeve 7 and the first top rod 6 are threadedly connected, the first top rod 6 can be screwed into the unloading cavity in the first liquid inlet valve sleeve 7, a plug-in type valve core assembly is formed, the system integration of the whole one-way valve is high, the installation and maintenance of the one-way valve are facilitated, the installation is simple, the maintenance is convenient, and the one-way valve can be repaired by directly replacing the plug-in type valve core assembly.

[0027] like Figure 2 As shown, the head of the first valve core 3 has a frustoconical structure and no longer extends into the unloading cavity of the first inlet valve sleeve 7. The first push rod 6 and the first valve core 3 only contact the center hole of the first valve seat 4, simplifying the structure of the valve core assembly. Furthermore, the first valve core 3 and the first valve seat 4 are connected by a hard seal. Both the first valve core 3 and the first valve seat 4 are made of 3Cr13 metal. Compared to seals made of soft materials, hard seals not only provide superior sealing performance but are also resistant to ultra-high pressures, extending the service life of the one-way valve.

[0028] like Figure 3 As shown, the second valve core assembly includes a second liquid inlet valve sleeve 18, a second valve sleeve joint 12, a second valve seat, a second valve core 14, a second push rod 17, a second large spring 16 arranged in the second liquid inlet valve sleeve 18 and used to apply an elastic force to the second push rod 17, and a second small spring 13 arranged in the second valve sleeve joint 12 and used to apply an elastic force to the second valve core 14. The second push rod 17 is movably arranged in the second liquid inlet valve sleeve 18, the second valve core 14 is movably arranged in the second valve sleeve joint 12, and the second liquid inlet valve sleeve 18 and the second valve sleeve joint 12 are threadedly connected.

[0029] like Figure 3 As shown, the second liquid inlet valve sleeve 18 is provided with a sixth liquid passage hole 21, and the third liquid passage hole of the second liquid inlet valve sleeve 18 is connected to another liquid inlet hole provided on the valve body 8. The second valve sleeve connector 12 is provided with a fifth liquid passage hole 20, and the fifth liquid passage hole 20 of the second valve sleeve connector 12 is connected to another liquid outlet hole provided on the valve body 8. The second valve core 14 is provided with a fourth liquid passage hole 19, and there are multiple fourth liquid passage holes 19. The fourth liquid passage holes 19 connect the inner cavity of the second valve core 14 and the inner cavity of the second valve sleeve connector 12.

[0030] like Figure 1 and Figure 3As shown, the second valve sleeve joint 12 is inserted into the second valve cavity of the valve body 8 and is screwed with the valve body 8, the second liquid inlet valve sleeve 18 is located in the second valve cavity of the valve body 8, the second liquid inlet valve sleeve 18 is provided with an unloading cavity, the head of the second top rod 17 extends into the unloading cavity of the second liquid inlet valve sleeve 18, the tail of the second top rod 17 is located in the second valve cavity, and the outer circular surface of the tail of the second top rod 17 is in contact with the inner circular surface of the second valve cavity. The second valve core 14 is built-in in the second valve sleeve joint 12, the second valve seat is fixedly arranged between the second liquid inlet valve sleeve 18 and the second valve sleeve joint 12, the head of the second valve core 14 is in sealing connection with the second valve seat, and the second small spring 13 is further arranged between the second valve core 14 and the second valve sleeve joint 12. The second small spring 13 pushes the second valve core 14 to slide in the second valve sleeve joint 12, so that the head of the second valve core 14 can be in contact with the second top rod 17. One end of the second small spring 13 is inserted into the inner cavity of the second valve core 14, and the other end of the second small spring 13 is embedded in the positioning groove arranged on the inner wall surface of the second valve sleeve joint 12, so as to realize the guidance and positioning of the second small spring 13. The second small spring 13 is a rectangular spring. Under the same space condition, the rectangular cross section has greater rigidity than the spiral compression spring, has small volume, can reduce the occupied space, and can ensure that the check valve is closed in time and improve the working reliability.

[0031] As shown in the figure, Figure 3 The second top rod 17 moves towards the second valve core 14 under the push of the emulsion liquid entering the valve body 8 from the working port, first contacts the second valve core 14, pushes the second valve core 14 to move, and the second valve core 14 is separated from the second valve seat. At this time, the inner cavity of the second liquid inlet valve sleeve 18 is in communication with the inner cavity of the second valve sleeve joint 12. The head of the second top rod 17 is provided with external threads, the second liquid inlet valve sleeve 18 is provided with a second limiting block at a position adjacent to the unloading cavity in the interior, the second limiting block is provided with a through hole, the inner wall of the through hole is provided with internal threads matched with the external threads on the second top rod 17, a second large spring 16 is further sleeved on the second top rod 17, the second large spring 16 is a cylindrical spiral spring and is a compression spring, one end of the second large spring 16 abuts against the second limiting block, and the other end abuts against the tail of the second top rod 17. The second liquid inlet valve sleeve 18 and the second top rod 17 are in threaded connection, the second top rod 17 can be screwed into the unloading cavity in the second liquid inlet valve sleeve 18, a plug-in type valve core assembly is formed, the system integration of the entire check valve is high, the installation and maintenance of the check valve are facilitated, that is, the installation is simple, the maintenance is convenient, and the check valve can be repaired by directly replacing the plug-in type valve core assembly.

[0032] As shown in the figure, Figure 3As shown, the head of the second spool 14 is frustoconical, and the head of the second spool 14 no longer extends into the unloading cavity of the second inlet valve sleeve 18, and the second top rod 17 only starts to contact the second spool 14 at the central hole of the second valve seat, so that the structure of the spool assembly is simpler. In addition, the second spool 14 and the second valve seat are hard sealed, and the second spool 14 and the second valve seat are both made of 3Cr13 metal material, and compared with soft sealing, hard sealing not only has good sealing performance, but also can resist super high pressure, and can prolong the service life of the check valve.

[0033] As Figure 1 As shown, the length of the first spool assembly is less than the length of the second spool assembly, the length of the first valve cavity is less than the length of the second valve cavity, and the first valve sleeve joint 1 and the second valve sleeve joint 12 are used for connecting with the external oil pipe joint.

[0034] The utility model has been described exemplarily above in combination with the drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned mode. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model, or the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. The coal discharge integrated one-way valve includes a valve body, a first valve core assembly and a second valve core assembly, and is characterized by: The first valve core assembly includes a first liquid inlet valve sleeve, a first valve sleeve connector, a first valve core, a first push rod, a first large spring disposed in the first liquid inlet valve sleeve and used for applying an elastic force to the first push rod, and a first small spring disposed in the first valve sleeve connector and used for applying an elastic force to the first valve core. The first push rod is movably disposed in the first liquid inlet valve sleeve, the first valve core is movably disposed in the first valve sleeve connector, and the first liquid inlet valve sleeve and the first valve sleeve connector are threadedly connected. The second valve core assembly includes a second liquid inlet valve sleeve, a second valve sleeve joint, a second valve core, a second push rod, a second large spring arranged in the second liquid inlet valve sleeve and used to apply an elastic force to the second push rod, and a second small spring arranged in the second valve sleeve joint and used to apply an elastic force to the second valve core. The second push rod is movably arranged in the second liquid inlet valve sleeve, the second valve core is movably arranged in the second valve sleeve joint, and the second liquid inlet valve sleeve and the second valve sleeve joint are threadedly connected.

2. The integrated one-way valve for coal discharge according to claim 1, characterized in that: The first small spring is a rectangular spring. One end of the first small spring is inserted into the interior of the first valve core. The first small spring is clamped between the first valve core and the first valve sleeve joint.

3. The integrated one-way valve for coal discharge according to claim 1, characterized in that: The first valve core is provided with a liquid hole, which communicates with the inner cavity of the first valve core and the inner cavity of the first valve sleeve joint.

4. The coal discharge integrated one-way valve according to any one of claims 1 to 3, characterized in that: The first small spring is a cylindrical coil spring.

5. The coal discharge integrated one-way valve according to any one of claims 1 to 3, characterized in that: The second small spring is a rectangular spring. One end of the second small spring is inserted into the interior of the second valve core. The second small spring is clamped between the second valve core and the second valve sleeve joint.

6. The coal discharge integrated one-way valve according to any one of claims 1 to 3, characterized in that: The second valve core is provided with a liquid hole, which communicates with the inner cavity of the second valve core and the inner cavity of the second valve sleeve joint.

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