Mounting structure of hydraulic control one-way valve

Abstract

The utility model discloses a hydraulic control one-way valve installation structure which comprises a hydraulic control one-way valve and a control valve seat arranged on a stand column, the hydraulic control one-way valve is arranged on the control valve seat, a first oil channel and a second oil channel which are connected with an inner cavity of the stand column are arranged in the control valve seat, and the hydraulic control one-way valve comprises a valve body and a valve element assembly arranged in the valve body. The valve body is provided with at least one first liquid outlet and at least two second liquid outlets, the first oil channel is directly communicated with the first liquid outlets, and the second oil channel is directly communicated with the second liquid outlets. According to the installation structure of the hydraulic control one-way valve, the hydraulic control one-way valve is directly installed on the stand column through the control valve seat, the hydraulic control one-way valve and the control valve seat are in plane contact, arrangement is convenient, the integration degree can be improved, liquid is directly supplied through the hydraulic control one-way valve, and the liquid supply speed of the hydraulic control one-way valve can be increased.

Description

Technical Field

[0001] This invention belongs to the technical field of hydraulic supports for fully mechanized coal mining. Specifically, this utility model relates to the installation structure of a hydraulically controlled check valve. Background Technology

[0002] Hydraulic supports are important machinery in coal mining operations. They mainly rely on columns to support the roof beam, thus keeping the support frame taut against the roof. When the hydraulic support needs to be moved, the hydraulic system controls the columns to descend, causing the roof beam to move away from the roof, and then the hydraulic support moves to a new position.

[0003] In the hydraulic system of the hydraulic support, the column is connected to the hydraulic control check valve. The extension and retraction of the column is controlled by opening and closing the hydraulic control check valve. However, the hydraulic control check valve is located far from the column and needs to be connected to the column through a hose. This results in low integration and slow fluid supply.

[0004] Chinese Patent Application No. 200710179466.2 discloses a dual telescopic column lifting system and a mining hydraulic support, used to control the lifting and lowering of dual telescopic columns. A balanced alternating check valve is connected to the oil circuit of the piston rod chamber of the outer cylinder of the dual telescopic column. The balanced alternating check valve has a main passage and a control port. The main passage is a normally open passage connected to the oil circuit of the piston rod chamber of the outer cylinder. The control port is connected to a switch control oil circuit, which can control the on / off state of the balanced alternating check valve.

[0005] The aim is to provide an improved mounting structure for a pilot-operated check valve, particularly regarding how to increase the fluid supply rate of the pilot-operated check valve. Utility Model Content

[0006] This invention provides an installation structure for a hydraulically controlled check valve, the purpose of which is to improve the liquid supply speed of the hydraulically controlled check valve.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an installation structure for a hydraulically controlled check valve, including a hydraulically controlled check valve and a control valve seat disposed on a column. The hydraulically controlled check valve is disposed on the control valve seat, and a first oil passage and a second oil passage are disposed inside the control valve seat and connected to the inner cavity of the column. The hydraulically controlled check valve includes a valve body and a valve core assembly disposed inside the valve body. A first liquid outlet and a second liquid outlet are disposed on the valve body. The first oil passage is directly connected to the first liquid outlet, and the second oil passage is directly connected to the second liquid outlet. At least one first liquid outlet is provided, and at least two second liquid outlets are provided.

[0008] The surface of the valve body is in contact with the surface of the control valve seat, and the first oil passage and the second oil passage have openings formed on the surface of the control valve seat.

[0009] The valve core assembly includes a first valve sleeve, a second valve sleeve, a valve seat, a movably disposed valve core, and a push rod movably disposed in the first valve sleeve for pushing the valve core.

[0010] The first valve sleeve and the second valve sleeve are threaded together.

[0011] The second valve sleeve is threadedly connected to the valve body.

[0012] The valve body is mounted on the control valve seat by bolts.

[0013] The installation structure of the hydraulic control check valve of this utility model allows the hydraulic control check valve to be directly installed on the column by setting a control valve seat. The hydraulic control check valve and the control valve seat have a planar contact, which facilitates the layout and can improve the integration. Moreover, the hydraulic control check valve can be directly supplied with liquid, which can improve the liquid supply speed of the hydraulic control check valve. Attached Figure Description

[0014] This manual includes the following figures, which illustrate the following:

[0015] Figure 1 This is a schematic diagram of the installation structure of the hydraulic control check valve of this utility model;

[0016] Figure 2 This is a cross-sectional view of a hydraulically controlled check valve;

[0017] Figure 3 This is a top view of a hydraulically controlled check valve;

[0018] Figure 4 This is the front view of a hydraulically controlled check valve;

[0019] Figure 5 This is a cross-sectional view of the valve core assembly;

[0020] Figure 6 This is a sectional view of the valve body;

[0021] The following are marked in the diagram: 1. Control valve seat; 2. First oil passage; 3. Second oil passage; 4. Column; 5. Valve body; 6. Valve core assembly; 601. Push rod; 602. First spring; 603. First valve sleeve; 604. Valve seat; 605. Valve core; 606. Second spring; 607. Second valve sleeve; 7. First outlet; 8. Second outlet. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0023] like Figures 1 to 6As shown, this utility model provides an installation structure for a hydraulically controlled check valve, including a hydraulically controlled check valve and a control valve seat 6041 disposed on a column 4. The hydraulically controlled check valve is disposed on the control valve seat 1. The control valve seat 1 is provided with a first oil passage 2 and a second oil passage 3 connected to the inner cavity of the column 4. The hydraulically controlled check valve includes a valve body 5 and a valve core assembly 6 disposed in the valve body 5. The valve body 5 is provided with a first outlet 7 and a second outlet 8. The first oil passage 2 is directly connected to the first outlet 7, and the second oil passage 3 is directly connected to the second outlet 8. One first outlet 7 is provided, and two second outlets 8 are provided.

[0024] Specifically, if Figures 1 to 6 As shown, the valve body 5 is a rectangular block structure. The valve body 5 has a first working port, a second working port, a third working port, a fourth working port, a fifth working port, and a sixth working port. A first liquid outlet 7 and a second liquid outlet 8 are located on the first surface of the valve body 5. The first, second, and third working ports are located on the second surface of the valve body 5, and the fourth, fifth, and sixth working ports are located on the third surface of the valve body 5. The first and third working ports are coaxially aligned, as are the second and fourth working ports, and the third and sixth working ports. The second and third surfaces of the valve body 5 are opposite sides and parallel to each other. The first surface is located between the second and third surfaces and is perpendicular to both surfaces. The first surface of the valve body 5 is in contact with the surface of the control valve seat 1. The first oil passage 2 and the second oil passage 3 form two openings on the surface of the control valve seat 1, and the first liquid outlet 7 and the second liquid outlet 8 also form two openings on the first surface of the valve body 5.

[0025] The valve body 5 and the control valve seat 1 have planar contact, enabling planar liquid flow and a large flow rate. Furthermore, the valve body 5 is bolted to the control valve seat 1, and a through hole allows the bolts to pass through, facilitating easy assembly and disassembly. The hydraulic check valve is directly mounted on the column 4, resulting in high space integration. A sealing ring is installed between the valve body 5 and the control valve seat 1 to ensure a tight seal. One end of the first oil passage 2 connects to the first outlet 7, and the other end connects to the rod-side cavity of the column 4. One end of the second oil passage 3 connects to the second outlet 8, and the other end connects to the rodless cavity of the column 4. The control valve seat 1 is fixedly mounted on the outer wall of the column 4, and the control valve seat 1 and the hydraulic check valve are located on the same side of the column 4.

[0026] like Figure 2 As shown, the valve core assembly 6 is disposed in the valve cavity of the valve body 5, which extends from one end face of the valve body 5 into the interior of the valve body 5. The valve core assembly 6 is located between the first working port and the fourth working port, and between the second working port and the fifth working port.

[0027] like Figure 2 and Figure 5 As shown, the valve core assembly 6 includes a first valve sleeve 603, a second valve sleeve 607, a valve seat 604, a movably disposed valve core 605, and a push rod 601 movably disposed in the first valve sleeve 603 for pushing the valve core 605. The first valve sleeve 603 has liquid passage holes communicating with the second and fifth working ports, and the second valve sleeve 607 has liquid passage holes communicating with the first and fourth working ports and the second liquid outlet 8. The valve cavity communicates with the third and sixth working ports and the first liquid outlet 7, and the third and sixth working ports and the first liquid outlet 7 are located on the same side of the push rod 601. The second valve sleeve 607 is inserted into the valve cavity of the valve body 5 and threadedly connected to the valve body 5. The first valve sleeve 603 and the push rod 601 are located in the valve cavity of the valve body 5. The first valve sleeve 603 is provided with an unloading cavity. The head of the push rod 601 extends into the unloading cavity of the first valve sleeve 603, and the tail of the push rod 601 is located outside the first valve sleeve 603.

[0028] The valve core 605 is built into the second valve sleeve 607, and the valve seat 604 is fixedly disposed between the first valve sleeve 603 and the second valve sleeve 607. The head of the valve core 605 is sealed to the valve seat 604. A second spring 606 is also provided between the valve core 605 and the second valve sleeve 607. The second spring 606 pushes the valve core 605 to slide within the valve core 605, so that the head of the valve core 605 can contact the push rod 601. The push rod 601 moves towards the valve core 605 under the push of the emulsion entering the valve body 5 from the working port. It first contacts the valve core 605, pushes the valve core 605 to move, and the valve core 605 separates from the valve seat 604. At this time, the inner cavity of the first valve sleeve 603 is connected to the inner cavity of the second valve sleeve 607.

[0029] like Figure 5 As shown, the head of the push rod 601 has an external thread. A limiting block is located inside the first valve sleeve 603 adjacent to the unloading chamber. The limiting block has a through hole, and the inner wall of the through hole has an internal thread that matches the external thread on the push rod 601. A first spring 602 is also fitted onto the push rod 601. One end of the first spring 602 abuts against the limiting block, and the other end abuts against the tail of the push rod 601. The first valve sleeve 603 and the push rod 601 are threadedly connected. The push rod 601 can be screwed into the unloading chamber inside the first valve sleeve 603 to form a cartridge-type valve core assembly 6. This results in a high degree of system integration for the entire hydraulic check valve, facilitating its installation and maintenance. Installation is simple, and maintenance is convenient; the hydraulic check valve can be repaired simply by replacing the cartridge-type valve core assembly 6.

[0030] like Figure 5As shown, the head of the valve core 605 has a frustum-shaped structure, and the head of the valve core 605 no longer extends into the unloading cavity of the first valve sleeve 603. The push rod 601 and the valve core 605 only begin to contact each other at the center hole of the valve seat 604, making the structure of the valve core assembly 6 simpler. In addition, the valve core 605 and the valve seat 604 are connected by a hard seal. Both the valve core 605 and the valve seat 604 are made of Cr stainless steel, a metallic material. Compared with soft material seals, hard seals not only have better sealing performance but can also withstand ultra-high pressure, thus extending the service life of the hydraulic check valve. A liquid passage hole is provided on the annular sidewall of the valve core 605. This liquid passage hole is radially through the annular sidewall of the valve core 605, connecting the inner cavity of the valve core 605 and the inner cavity of the first valve sleeve. Multiple liquid passage holes are provided to ensure that the valve core 605 can move axially.

[0031] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. The mounting structure of a hydraulically controlled check valve, characterized in that: The system includes a hydraulically controlled check valve and a control valve seat mounted on a column. The hydraulically controlled check valve is mounted on the control valve seat, and the control valve seat has a first oil passage and a second oil passage that are connected to the inner cavity of the column. The hydraulically controlled check valve includes a valve body and a valve core assembly mounted on the valve body. The valve body has a first liquid outlet and a second liquid outlet. The first oil passage is directly connected to the first liquid outlet, and the second oil passage is directly connected to the second liquid outlet. At least one first liquid outlet and at least two second liquid outlets are provided. The valve body has a rectangular block structure. It has a first working port, a second working port, a third working port, a fourth working port, a fifth working port, and a sixth working port. A first liquid outlet and a second liquid outlet are located on the first surface of the valve body. The first, second, and third working ports are located on the second surface of the valve body, and the fourth, fifth, and sixth working ports are located on the third surface of the valve body. The first and third working ports are coaxial, as are the second and fourth working ports, and the third and sixth working ports. The second and third surfaces of the valve body are opposite sides and parallel to each other. The first surface is located between the second and third surfaces and is perpendicular to both surfaces. The first surface of the valve body is in contact with the surface of the control valve seat. A first oil passage and a second oil passage form two openings on the surface of the control valve seat. The first liquid outlet and the second liquid outlet also form two openings on the first surface of the valve body. A sealing ring is provided between the valve body and the control valve seat. One end of the first oil passage is connected to the first liquid outlet, and the other end of the first oil passage is connected to the rod chamber of the column. One end of the second oil passage is connected to the second liquid outlet, and the other end of the second oil passage is connected to the rodless chamber of the column. The control valve seat is fixedly installed on the outer wall of the column, and the control valve seat and the hydraulic check valve are located on the same side of the column. The valve core assembly is disposed in the valve cavity of the valve body, which extends from one end face of the valve body into the interior of the valve body. The valve core assembly is located between the first working port and the fourth working port, and between the second working port and the fifth working port. The valve core assembly includes a first valve sleeve, a second valve sleeve, a valve seat, a movably disposed valve core, and a push rod movably disposed in the first valve sleeve for pushing the valve core. The first valve sleeve has a liquid passage hole communicating with the second working port and the fifth working port. The second valve sleeve has a liquid passage hole communicating with the first working port, the fourth working port, and the second liquid outlet. The valve cavity is communicating with the third working port, the sixth working port, and the first liquid outlet. The third working port, the sixth working port, and the first liquid outlet are located on the same side of the push rod. The second valve sleeve is inserted into the valve cavity of the valve body and threadedly connected to the valve body. The first valve sleeve and the push rod are located in the valve cavity of the valve body. The first valve sleeve has a unloading cavity. The head of the push rod extends into the unloading cavity of the first valve sleeve, and the tail of the push rod is located outside the first valve sleeve. The valve core is built into the second valve sleeve, the valve seat is fixedly disposed between the first valve sleeve and the second valve sleeve, the head of the valve core is sealed to the valve seat, and a second spring is also provided between the valve core and the second valve sleeve. The head of the push rod has an external thread. The inside of the first valve sleeve is provided with a limiting block adjacent to the unloading chamber. The limiting block has a through hole. The inner wall of the through hole has an internal thread that matches the external thread on the push rod. A first spring is also sleeved on the push rod. One end of the first spring abuts against the limiting block, and the other end abuts against the tail of the push rod.

2. The mounting structure of the hydraulically controlled check valve according to claim 1, characterized in that: The valve body is mounted on the control valve seat by bolts.

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