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, an oil channel connected with an inner cavity of the stand column is arranged in the control valve seat, and the hydraulic control one-way valve comprises a valve body, a plug and a valve element assembly, the plug and the valve element assembly are coaxially arranged, the valve body is provided with at least one liquid outlet, and the liquid outlets are directly communicated. 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 an oil passage connected to the inner cavity of the column is provided inside the control valve seat. The hydraulically controlled check valve includes a valve body and a screw plug and a valve core assembly disposed inside the valve body. The screw plug and the valve core assembly are coaxially arranged. An outlet is provided on the valve body, and the outlet is directly connected. At least one outlet is provided.

[0008] The surface of the valve body is in contact with the surface of the control valve seat, and the oil passage has an opening 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 movable large valve core and a small valve core, and a push rod movable in the first valve sleeve for pushing the large valve core and the small 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, and the threaded sleeve and the second valve sleeve are arranged adjacent to each other.

[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] Figure 7 This is a cross-sectional view of the small valve core;

[0022] Figure 8 This is a cross-sectional view of the large valve core;

[0023] The following are marked in the diagram: 1. Control valve seat; 2. Oil passage; 3. Plug; 4. Column; 5. Valve body; 6. Valve core assembly; 601. Push rod; 602. First spring; 603. First valve sleeve; 604. Valve seat; 605. Large valve core; 606. Second spring; 607. Second valve sleeve; 608. Small valve core; 609. First liquid passage; 610. Second liquid passage; 611. First guide section; 612. Second guide section; 613. Third liquid passage; 614. Fourth liquid passage; B. Liquid outlet. Detailed Implementation

[0024] 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.

[0025] like Figures 1 to 6 As 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 1 disposed on a column 4. The hydraulically controlled check valve is disposed on the control valve seat 1, and an oil passage 2 connected to the inner cavity of the column 4 is provided in the control valve seat 1. The hydraulically controlled check valve includes a valve body 5 and a screw plug 3 and a valve core assembly disposed in the valve body 5. The screw plug 3 and the valve core assembly are coaxially arranged. An outlet is provided on the valve body 5, and the outlet is directly connected. There is one outlet.

[0026] Specifically, such as Figures 1 to 6 As shown, the valve body 5 is a rectangular block structure. The valve body 5 has two first working ports A, two second working ports PA, and two third working ports PB. The liquid outlet is located on the first surface of the valve body 5. The two first working ports A are respectively located on the second and third surfaces of the valve body 5. The two second working ports PA are respectively located on the second and third surfaces of the valve body 5. The two third working ports PB are respectively located on the second and third surfaces of the valve body 5. The two first working ports A, PA, and PB are coaxial. The second and third surfaces of the valve body 5 are opposite surfaces 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 oil passage 2 has an opening on the surface of the control valve seat 1, and the liquid outlet has an opening on the first surface of the valve body 5.

[0027] 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 oil passage 2 connects to the outlet, and the other end connects to the rod chamber 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.

[0028] like Figure 2As shown, the valve core assembly 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 is located between two first working ports and two second working ports. The threaded sleeve is threadedly connected to the valve body 5 and is located inside the valve body 5. The threaded sleeve is located at the two third working ports, and is provided with a first connecting hole connecting the two third working ports, a second connecting hole connecting the valve cavity, and a third connecting hole connecting the liquid outlet. The first connecting hole, the second connecting hole, and the third connecting hole are connected, and the second connecting hole is coaxially arranged with the valve cavity.

[0029] like Figure 2 and Figure 5 As shown, the valve core assembly includes a first valve sleeve 603, a second valve sleeve 607, a valve seat 604, a movably disposed large valve core 605 and a small valve core 608, and a push rod 601 movably disposed in the first valve sleeve 603 for pushing the large valve core 605 and the small valve core 608. The large valve core 605 is sleeved on the small valve core 608. The first valve sleeve 603 is located between two second working ports and has a liquid passage hole communicating with the two second working ports. The second valve sleeve 607 is located between two first working ports and has a liquid passage hole communicating with the two first working ports. 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 located between the threaded sleeve and the second valve sleeve 607. 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 in the inner cavity of the first valve sleeve 603. A retaining ring for axially limiting the push rod 601 is provided in the inner cavity of the first valve sleeve 603. The large valve core 605 and the small valve core 608 are built into the second valve sleeve 607. The valve seat 604 is fixedly disposed between the first valve sleeve 603 and the second valve sleeve 607. The head of the large valve core 605 is sealed to the valve seat 604. A second spring 606 is also provided between the small valve core 608 and the second valve sleeve 607. The second spring 606 pushes the small valve core 608 to slide in the large valve core 605, so that the head of the small valve core 608 can extend out of the large valve core 605 and first contact the push rod 601. The push rod 601 moves towards the large valve core 605 and the small valve core 608 under the push of the emulsion entering the valve body 5 from the working port. It first contacts the small valve core 608 and pushes the small valve core 608 to move. At this time, the unloading amount is small. When the push rod 601 moves to contact the large valve core 605, it pushes the large valve core 605 to move, and the large valve core 605 separates from the valve seat 604. At this time, the unloading amount is large.

[0030] like Figure 5As 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. This results in a high degree of system integration for the entire hydraulic check valve, facilitating its installation and maintenance. Installation is simple, maintenance is convenient, and the hydraulic check valve can be repaired simply by replacing the cartridge-type valve core assembly.

[0031] like Figure 5 As shown, the head of the large valve core 605 has a frustum-shaped structure, and the head of the large valve core 605 no longer extends into the unloading chamber of the first valve sleeve 603. The push rod 601 only contacts the large valve core 605 and the small valve core 608 at the center hole of the valve seat 604, making the structure of the valve core assembly simpler. In addition, the connection between the large valve core 605 and the valve seat 604 is a hard seal. The large valve core 605, the small valve core 608, and the valve seat 604 are all made of 3Cr13 stainless steel. Compared with soft material seals, hard seals not only have better sealing performance but can also withstand ultra-high pressure, which can extend the service life of the hydraulic check valve.

[0032] like Figure 5 and Figure 7As shown, the small valve core 608 includes a first guide section 611, a sealing section, and a second guide section 612 arranged sequentially. A first sealing surface is provided on the sealing section, and a second sealing surface is provided on the large valve core 605 that contacts the first sealing surface. The first sealing surface is a conical surface. After the first sealing surface contacts the second sealing surface, the hydraulic check valve is closed. The first guide section 611, the sealing section, and the second guide section 612 are coaxially fixedly connected. The first guide section 611 and the second guide section 612 are cylindrical, and the maximum outer diameter of the sealing section is larger than the outer diameter of the first guide section 611 and the second guide section 612. The large valve core 605 has a first central hole and a second central hole, which are coaxial and connected. The diameter of the first central hole is smaller than that of the second central hole. A first guide section 611 is inserted into the first central hole, and a sealing section and a second guide section 612 are located in the second central hole. The diameter of the second central hole is larger than the outer diameter of the sealing section and the second guide section 612. The outer diameter of the first guide section 611 is the same as the diameter of the first central hole. The outer circular surface of the large valve core 6056 contacts the inner circular surface of the second valve sleeve 607, which guides the large valve core 6056. The inner circular surface of the second valve sleeve 607 is a cylindrical surface with a constant diameter along the axial direction. The outer circular surface of the first guide section 611 is also a cylindrical surface with a constant diameter along the axial direction, and its outer diameter is the same as that of the first central hole. The first guide section 611 is provided with a first liquid passage for guiding the liquid entering the push rod 601 from the first valve sleeve 603 to the second valve sleeve 607.

[0033] like Figure 7 As shown, the first liquid passage includes a first liquid passage hole 609 and a second liquid passage hole 610. The first liquid passage hole 609 communicates with the inner cavity of the first valve sleeve 603, and the second liquid passage hole 610 communicates with the first liquid passage hole 609. The first liquid passage hole 609 extends axially from the end face of the first guide section 611 facing the push rod 601 into the interior of the first guide section 611, and is a circular hole located at the center of the first guide section 611. The second liquid passage hole 610 extends radially from the inner circular surface of the first liquid passage hole 609 to the outer circular surface of the first guide section 611. Multiple second liquid passage holes 610 are provided, and all second liquid passage holes 610 are evenly distributed circumferentially with the axis of the first liquid passage hole 609 as the center line.

[0034] like Figure 5 and Figure 8As shown, the push rod 601 is provided with a second liquid passage for guiding the liquid in the first valve sleeve 603 to the first liquid passage. The second liquid passage includes a third liquid passage hole 613 and a fourth liquid passage hole 614. The third liquid passage hole 613 communicates with the first liquid passage, and the fourth liquid passage hole 614 communicates with the inner cavity of the first valve sleeve 603. The third liquid passage hole 613 extends axially from the end face of the push rod 601 facing the small valve core 6087 to the interior of the push rod 601. The third liquid passage hole 613 is located at the center of the push rod 601 and is coaxial with the first liquid passage hole 609. The fourth liquid passage hole 614 extends radially from the inner circular surface of the third liquid passage hole 613 to the outer circular surface of the push rod 601. Multiple fourth liquid passage holes 614 are provided, and all fourth liquid passage holes 614 are evenly distributed circumferentially with the axis of the third liquid passage hole 613 as the center line.

[0035] The fourth liquid passage 614 guides the liquid entering the inner cavity of the first valve sleeve 603 to the third liquid passage 613. After the end face of the push rod 601 contacts the small valve core 608, it pushes the small valve core 608 to move, causing the small valve core 608 to separate from the large valve core 605. The liquid in the third liquid passage 613 enters the first liquid passage 609, and then flows into the inner cavity of the second valve sleeve 607 through the second liquid passage 610. With this structure, there is no gap between the outer circular surface of the first guide section 611 of the small valve core 608 and the inner circular surface of the large valve core 605. The small valve core 608 will not deflect during movement, and the second spring 606 is less likely to bend or break, improving reliability, ensuring uniform liquid flow, and the small valve core 608 is also easy to process.

[0036] like Figure 5 As shown, one end of the second spring 606 is located in the inner cavity of the second guide section 612, and the other end of the second spring 606 is located in the positioning groove provided on the inner wall surface of the second valve sleeve 607. The second spring 606 is a rectangular spring and a compression spring. Under the same space conditions, a rectangular cross-section has greater stiffness and smaller volume than a helical compression spring, which can reduce the space occupied, ensure timely closure of the hydraulic check valve, and improve operational reliability.

[0037] The second guide section 612 is located in the second central hole of the large valve core 605. The length of the second guide section 612 is greater than the length of the second central hole. After the push rod 601 pushes the small valve core 608 to the limit position, the second spring 606 is in a compressed state and the length of the second spring 606 at this time is less than the valve core space. The distance between the second guide section 612 and the inner wall of the second valve sleeve 607 is small, so the second spring 606 will not tilt or be crushed.

[0038] 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. An installation structure for a hydraulically controlled check valve, characterized in that: It 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 an oil passage that connects to the inner cavity of the column. The hydraulically controlled check valve includes a valve body and a plug and valve core assembly mounted inside the valve body. The plug and valve core assembly are coaxially arranged. The valve body has an outlet, which is directly connected to the column. There is at least one outlet. The valve body has a rectangular block structure. It has two first working ports A, two second working ports PA, and two third working ports PB. The outlet is located on the first surface of the valve body. The two first working ports A are located on the second and third surfaces of the valve body, respectively. The two second working ports PA and PB are located on the second and third surfaces of the valve body, respectively. The two first working ports A, PA, and PB are coaxial. 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. An opening is formed on the surface of the control valve seat for the oil passage, and an opening is formed on the first surface of the valve body for the outlet. The valve body and the control valve seat are in planar contact to achieve planar liquid flow; a sealing ring is installed between the valve body and the control valve seat to achieve sealing; one end of the oil passage is connected to the liquid outlet, and the other end of the oil passage is connected to the rod 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 includes a first valve sleeve, a second valve sleeve, a valve seat, a movable large valve core and a small valve core, and a push rod movable in the first valve sleeve for pushing the large valve core and the small valve core. The large valve core is sleeved on the small valve core. The first valve sleeve is located between two second working ports and has a liquid passage hole communicating with the two second working ports. The second valve sleeve is located between two first working ports and has a liquid passage hole communicating with the two first working ports. 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 is located between the threaded sleeve and the second valve sleeve. The first valve sleeve is provided with an 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 in the inner cavity of the first valve sleeve. A retaining ring for axially limiting the push rod is provided in the inner cavity of the first valve sleeve. The large valve core and the small valve core are built into the second valve sleeve. The valve seat is fixedly set between the first valve sleeve and the second valve sleeve. The head of the large valve core is sealed to the valve seat. A second spring is also provided between the small valve core and the second valve sleeve. The second spring pushes the small valve core to slide in the large valve core. The small valve core includes a first guide section, a sealing section, and a second guide section arranged sequentially. A first sealing surface is provided on the sealing section, and a second sealing surface, which contacts the first sealing surface, is provided on the large valve core. The first sealing surface is a conical surface. After the first and second sealing surfaces contact each other, the hydraulic check valve is closed. The first guide section, sealing section, and second guide section are coaxially and fixedly connected. The first and second guide sections are cylindrical, and the maximum outer diameter of the sealing section is larger than the outer diameter of the first and second guide sections. The large valve core contains a first central hole and a second central hole, which are coaxially arranged and connected. The diameter of the first central hole is smaller than that of the second central hole. The first guide section is inserted into the first central hole, and the sealing section and the second guide section are located in the second central hole. The diameter of the second central hole is larger than the outer diameter of the sealing section and the second guide section. The outer diameter of the first guide section is the same as the diameter of the first central hole. The outer circular surface of the large valve core contacts the inner circular surface of the second valve sleeve, which guides the large valve core. The inner circular surface of the second valve sleeve is a cylindrical surface with a constant diameter along the axial direction. The outer circular surface of the first guide section is a cylindrical surface with a constant diameter along the axial direction, and the outer diameter of the first guide section is the same as the diameter of the first central hole. A first liquid passage is provided in the first guide section to guide the liquid entering the push rod from the first valve sleeve to the second valve sleeve. The first liquid passage includes a first liquid passage hole and a second liquid passage hole. The first liquid passage hole communicates with the inner cavity of the first valve sleeve, and the second liquid passage hole communicates with the first liquid passage hole. The first liquid passage hole extends axially from the end face of the first guide section facing the push rod to the interior of the first guide section. The first liquid passage hole is a circular hole set at the center of the first guide section. The second liquid passage hole extends from the inner circular surface of the first liquid passage hole to the outer circular surface of the first guide section. The second liquid passage hole extends radially along the first guide section. Multiple second liquid passage holes are provided, and all second liquid passage holes are evenly distributed circumferentially with the axis of the first liquid passage hole as the center line. A second liquid passage is provided on the push rod for guiding the liquid in the first valve sleeve to the first liquid passage; The second liquid passage includes a third liquid passage hole and a fourth liquid passage hole. The third liquid passage hole communicates with the first liquid passage, and the fourth liquid passage hole communicates with the inner cavity of the first valve sleeve. The third liquid passage hole extends axially from the end face of the push rod facing the small valve core to the inside of the push rod. The third liquid passage hole is located at the center of the push rod and is coaxial with the first liquid passage hole. The fourth liquid passage hole extends radially from the inner circular surface of the third liquid passage hole to the outer circular surface of the push rod. Multiple fourth liquid passage holes are provided, and all fourth liquid passage holes are evenly distributed circumferentially with the axis of the third liquid passage hole as the center line. The fourth liquid passage is used to guide the liquid in the inner cavity of the first valve sleeve to the third liquid passage. After the end face of the push rod contacts the small valve core, it pushes the small valve core to move, so that the small valve core is separated from the large valve core. The liquid in the third liquid passage enters the first liquid passage and then flows into the inner cavity of the second valve sleeve through the second liquid passage.

2. The mounting structure of the hydraulically controlled check valve according to claim 1, characterized in that: The first valve sleeve and the second valve sleeve are threaded together.

3. 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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