Hydraulic support spherical control valve and using method thereof

Abstract

The invention provides a hydraulic support spherical control valve and a using method thereof. The control valve mainly comprises a control rod, an upper end cover, a right valve body, a spherical valve element, a left valve body and a lower end cover. The core is that a control rod is axially moved, the communication state of a flow channel in the right valve body is changed, high-pressure emulsion of a system is used for pushing the spherical valve element to rotate forwards and reversely, and therefore the corresponding relation between an annular groove in the valve element and a high-pressure oil port and a low-pressure oil port of the valve body is switched, and accurate control over the flowing direction of the emulsion is achieved. The special structure that the spherical valve element is matched with the stepped control rod is adopted, the internal structure of the valve body is remarkably simplified, the number of parts is reduced, and the hydraulic control valve has the advantages of being compact in structure, easy and convenient to operate, rapid in response, reliable in sealing, low in manufacturing cost, convenient to maintain and the like and is suitable for manual and electro-hydraulic pilot control systems of underground coal mine hydraulic supports.

Description

Technical Field

[0001] This invention relates to the field of hydraulic support control valve technology in coal mines, specifically to a ball control valve for hydraulic supports and its usage method. Background Technology

[0002] Currently, the motion control of hydraulic supports in coal mines mainly employs two methods: manual control and electro-hydraulic pilot control. Both methods generally use linear actuation to control the flow direction of the emulsion. Existing electro-hydraulic pilot valves, manual valves, and manual pilot valves for hydraulic supports suffer from problems such as complex structure, numerous parts, high manufacturing costs, and difficult maintenance. Especially under high-frequency use and high-pressure environments, traditional valve bodies are prone to wear, leakage, and inconvenient operation.

[0003] Therefore, it is necessary to provide a hydraulic support control valve that is simple in structure, reliable in operation, and low in cost to solve the problems existing in the prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a ball control valve for hydraulic supports and its usage method, aiming to solve the technical problems of existing hydraulic support control valves having complex structures, many parts, high processing costs, and inconvenient maintenance, and to provide a ball control valve with simple structure, flexible operation, good sealing performance, and long service life.

[0005] According to one objective of the present invention, a hydraulic support ball control valve is provided, comprising a valve core, a right valve body, a left valve body, an upper end cover, a lower end cover, and a control rod. The right valve body and the left valve body are assembled together. The valve core is located inside the right valve body and the left valve body. The upper end cover is installed on the top of the assembly of the left valve body and the right valve body, and the lower end cover is installed on the bottom of the assembly of the left valve body and the right valve body. The right valve body is provided with an axial hole. The control rod is axially movable, passing through the upper end cover and extending into the axial hole of the right valve body. The axial movement of the control rod drives the valve core to rotate, thereby switching the flow path of the emulsion in the valve.

[0006] Furthermore, the control rod is a stepped column structure, which includes, along the axial direction, a first large diameter segment, a first small diameter segment, a second large diameter segment, a second small diameter segment, and a third large diameter segment.

[0007] Furthermore, five annular grooves are spaced apart along the length of the axial hole, and the axial movement of the control rod controls the connection and isolation between the annular grooves by cooperating with each annular groove through different diameter segments.

[0008] Furthermore, the valve core includes a ball, an upper push plate extending outward from the upper part of the ball, and a lower push plate extending outward from the lower part of the ball; the right valve body and the left valve body are respectively provided with spherical grooves that cooperate with the ball on their respective inner sides, and umbrella-shaped holes that respectively accommodate the upper push plate and the lower push plate.

[0009] Furthermore, the sphere is provided with a first annular groove and a second annular groove on its left and right sides, and the central angle corresponding to the second annular groove is greater than the central angle corresponding to the first annular groove.

[0010] Furthermore, the right valve body is provided with a high-pressure emulsion hole, which penetrates the right valve body and communicates with the internal spherical groove; the left valve body is provided with at least one low-pressure emulsion hole, which communicates with the internal spherical groove.

[0011] Furthermore, the left valve body is also provided with a connection hole, which is connected to the spherical groove or low-pressure emulsion hole through an internal pipeline.

[0012] Furthermore, the left valve body and the right valve body are fixedly connected by fasteners, and after assembly, the spherical grooves of the two together form a complete chamber to accommodate the valve core, and the cylindrical holes of the two are spliced ​​together to form a complete channel through which the central axis of the valve core passes.

[0013] Furthermore, the lower end cover is a plate structure used to seal the bottom of the valve body assembly.

[0014] The usage method of the above-mentioned hydraulic support ball control valve includes: The connection state of each flow channel in the axial hole of the right valve body is changed by moving the control rod axially. The ball valve core is driven to rotate forward or backward by using the thrust of high-pressure emulsion and changing the connection state. By rotating the valve core, the correspondence between the annular groove on it and the high-pressure and low-pressure emulsion holes on the valve body is switched, thereby controlling the direction of fluid supply to the hydraulic support actuator.

[0015] The hydraulic support ball control valve provided by this invention features a reasonable structural design, employing an integral ball valve core and a stepped control rod, significantly reducing the number of parts and assembly steps, thereby substantially lowering manufacturing costs and maintenance complexity. It offers precise control and rapid response: the linear displacement of the control rod directly and precisely drives the valve core to rotate and switch flow channels, making operation simple and responsive, thus improving the motion control accuracy and efficiency of the hydraulic support. It provides reliable sealing and a long service life: the ball valve core and valve body groove form a high-fit sealing pair, providing excellent sealing performance under high-pressure emulsion conditions, effectively reducing leakage and wear, and extending the valve's service life. It is highly adaptable and easy to promote: the valve has a compact structure and can be used independently in manual control systems or easily integrated into existing electro-hydraulic pilot systems for upgrades, demonstrating high versatility and applicability. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the exploded structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the outer structure of the right shell in an embodiment of the present invention; Figure 4 This is a schematic diagram of the inner structure of the right valve body in an embodiment of the present invention; Figure 5 This is a schematic diagram of the mating structure between the right valve body and the control rod in an embodiment of the present invention; Figure 6 This is a schematic diagram of the valve core structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the inner structure of the left shell in an embodiment of the present invention; Figure 8 This is a schematic diagram of the outer structure of the left valve body in an embodiment of the present invention.

[0018] In the diagram: 1. Control lever; 2. Top cap; 2A. Through hole; 3. Right valve body; 4. Valve core; 41. Upper push plate; 42. Central shaft; 43. Ball; 44. First annular groove; 46. Second annular groove; 45. Lower push plate; 5. Left valve body; 6. Lower end cover; 11. First largest diameter segment; 13. Second largest diameter segment; 15. Third largest diameter segment; 12. First smallest diameter segment; 14. Second smallest diameter segment. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Example 1 like Figures 1-8 As shown, this embodiment of a hydraulic support ball control valve includes a control rod 1, an upper end cover 2, a right valve body 3, a valve core 4, a left valve body 5, and a lower end cover 6, wherein: In this embodiment, the control rod 1 used to control the flow direction of the emulsion is a stepped column structure. The control rod 1 consists of a first large diameter 11 at both ends, a third large diameter 15, a second large diameter 13 in the middle, and a first small diameter 12 and a second small diameter 14 in two sections.

[0023] The upper end cover 2 is provided with a through hole 2A for the control rod 1 to pass through. The right valve body 3 is provided with an axial hole 3A. After the control rod 1 passes through the through hole 2A on the upper end cover, it enters the axial hole 3A on the right valve body 3. The axial hole 3A is provided with five annular grooves (including annular groove 3C1, annular groove 3C2, annular groove 3C3, annular groove 3C4 and annular groove 3C5).

[0024] The control rod 1 can move up and down within the axial hole 3A; the axial movement of the control rod 1 controls the flow path of the high-pressure and low-pressure emulsions by changing the communication state between the annular grooves.

[0025] The right valve body 3 has a spherical groove 3G in the middle and a high-pressure emulsion hole 3P that penetrates the right valve body 3. The high-pressure emulsion hole 3P penetrates the shell of the right valve body 3 and is connected to the middle of the spherical groove 3G. The high-pressure emulsion hole 3P is connected to the annular groove 3C3 through a connecting channel.

[0026] The right valve body 3 has a cylindrical hole 3E in the middle that penetrates the housing. The two ends of the cylindrical hole 3E penetrate the housing of the right valve body 3 respectively, and the middle of the cylindrical hole 3E is connected to the spherical groove 3G. The top of the right valve body 3 is provided with an umbrella-shaped hole 3B with a 90° central angle, and the edge of the umbrella-shaped hole 3B is connected to the cylindrical hole 3E. The right valve body 3 is also provided with a transversely arranged emulsion through hole 3F and emulsion through hole 3F1 in the middle. One end of the emulsion through hole 3F and emulsion through hole 3F1 is connected to the spherical groove 3G respectively. The other end of the emulsion through hole 3F and emulsion through hole 3F1 does not penetrate the shell of the right valve body 3, but is located inside the shell.

[0027] The right valve body 3 is provided with a connecting hole 3C11, which is connected to the annular groove 3C4; The left valve body 5 has a spherical groove 5G in the middle and a connecting hole 5DY on the other side of the left valve body 5. The connecting hole 5DY is connected to the spherical groove 5G. The left valve body 5 has a horizontally arranged low-pressure emulsion hole 5F and low-pressure emulsion hole 5F1 in the middle. One end of the low-pressure emulsion hole 5F and low-pressure emulsion hole 5F1 is connected to the spherical groove 5G respectively. The other end of the low-pressure emulsion hole 5F and low-pressure emulsion hole 5F1 is located inside the housing of the left valve body 5. Both ends of the low-pressure emulsion hole 5F and low-pressure emulsion hole 5F1 pass through the housing of the left valve body 5 through vertical connecting holes.

[0028] The bottom of the left valve body 5 is provided with an umbrella-shaped hole 5B with a 90° central angle, and the push plate 45 matches the umbrella-shaped hole 5B.

[0029] The left valve body 5 has a cylindrical hole 5E that penetrates the housing of the left valve body 5 in the middle. The cylindrical hole 5E is connected to the spherical groove 5G, so the cylindrical hole 5E is indirectly connected to the connecting hole 5DY. The left valve body 5 has a connecting hole 5C inside and a connecting hole 5C1 on the side wall of the left valve body 5. One end of the connecting hole 5C is connected to the umbrella-shaped hole 5B, and the other end of the connecting hole 5C is connected to the connecting hole 5C1.

[0030] There is also an internal hole between the connecting hole 5C and the low-pressure emulsion hole 5F, and the connecting hole 5C and the low-pressure emulsion hole 5F are connected through the internal hole of the cover. In this embodiment, the connecting hole 5C of the left valve body 5 is connected to the connecting hole 5C1. When the left valve body 5 and the right valve body 6 are combined, the connecting hole 5C1 of the left valve body 5 is connected to the connecting hole 3C11 of the right valve body 3.

[0031] In this embodiment, the right valve body 3 and the left valve body 5 are fixedly connected by screws or bolts.

[0032] When the left valve body 5 and the right valve body 6 are combined, the low-pressure emulsion hole 5F and the low-pressure emulsion hole 5F1 are respectively spliced ​​with the emulsion through hole 3F and the emulsion through hole 3F1 to form a channel.

[0033] When the left valve body 5 and the right valve body 6 are combined, the cylindrical hole 5E on the housing of the left valve body 5 and the cylindrical hole 3E on the right valve body 3 are spliced ​​together to form a channel.

[0034] The right valve body 3 is provided with a horizontally arranged connecting hole 3D, which is connected to the annular groove 3C1. The left valve body 5 is provided with a horizontally arranged connecting hole 5D. When the left valve body and the right valve body are combined, the connecting hole 3D and the connecting hole 5D are connected. The connecting hole 5D is connected to the cylindrical hole 5E through an internal pipe, thereby indirectly communicating with the connecting hole 5DY; The right valve body 3 is provided with a horizontally arranged connecting hole 3C, which is connected to the umbrella-shaped hole 3B on the right valve body 3. The connecting hole 3C is connected to the annular groove 3C2, thereby realizing the connection between the annular groove 3C2 and the umbrella-shaped hole 3B. Meanwhile, an internal connecting hole is provided inside the right valve body 3, which connects the annular groove 3C3 with the high-pressure emulsion hole 3P. In this embodiment, since the annular groove 3C4 is connected to the connecting hole 3C11, the connecting hole 3C11 is connected to the connecting hole 5C1, and the connecting hole 5C is connected to the connecting hole 5C1, the annular groove 3C4 is connected to the connecting hole 5C.

[0035] In this embodiment, the valve core 4 of the ball-operated valve includes a central ball 43, and the ball 43 of the valve core 4 is sealed and fitted with the ball groove 3G (or ball groove 5G) of the right valve body 3 (or left valve body 5).

[0036] The sphere 43 has a first annular groove 44 and a second annular groove 46 on its left and right sides. The central angle corresponding to the second annular groove 46 is larger than the central angle corresponding to the first annular groove 44. The upper part of the sphere 43 is an upper push plate 41, and the lower part of the sphere 43 is a lower push plate 45. The upper push plate 41 is matched with an umbrella-shaped hole 3B, and the lower push plate 45 is matched with an umbrella-shaped hole 5B. The upper push plate 41 and the lower push plate 45 are arranged in the left and right directions of the central axis 42.

[0037] In use, the left valve body 5 and the right valve body 3 are assembled together and fixed by the upper end cover at the top and the lower end cover at the bottom. The lower end cover 6 is a plate structure.

[0038] The hydraulic support ball control valve of the present invention controls the rotation of the ball valve core 4 via the control rod 1, thereby controlling the direction of the emulsion. Specifically, the control principle is as follows: The emulsion connected to this control valve originates from the downhole emulsion pump station. The high-pressure emulsion port 3P is connected to the high-pressure port of the emulsion pump station, and the connection port 5DY is connected to the low-pressure port of the emulsion pump station. The low-pressure emulsion ports 5F and 5F1 are respectively connected to the two oil ports of the hydraulic support cylinder.

[0039] When the control lever 1 is in the initial position, the annular groove 3C1 is closed by the first large diameter section 11, the annular groove 3C2 is connected to the first small diameter section 12 and the connecting hole 3C, the annular groove 3C3 (high pressure emulsion hole 3P) is closed by the second large diameter section 13, the annular groove 3C4 is connected to the second small diameter section 14 and the connecting hole 5C, and the annular groove 3C5 is closed by the third large diameter section 15. At this time, the second annular groove 46 of the valve core 4 corresponds to the high pressure emulsion hole 3P, and the first annular groove 44 of the valve core 4 is simultaneously connected to the low pressure emulsion hole 5F, the low pressure emulsion hole 5F1 and the connecting hole 5DY. When the control lever 1 moves upward a certain distance, the annular groove 3C1 communicates with the annular groove 3C2 through the first small diameter section 12. The emulsion in the connecting hole 3C is connected to the connecting hole 5DY through the annular groove 3C2, the annular groove 3C1, the connecting hole 3D, the connecting hole 5D, and the cylindrical hole 5E. At the same time, the annular groove 3C3 (high pressure emulsion hole 3P) communicates with the annular groove 3C4 through the second small diameter section 14. The high pressure emulsion in the high pressure emulsion hole 3P flows into the connecting hole 5C through the annular groove 3C4, the connecting hole 3C11, and the connecting hole 5C1. The high pressure emulsion pushes the lower push plate 45 to rotate the valve core 4, so that the low pressure emulsion hole 5F communicates with the second annular groove 46, and the low pressure emulsion hole 5F1 communicates with the high pressure emulsion hole 3P, thereby realizing the action control of the hydraulic support. When the control lever 1 moves downward a certain distance, the annular groove 3C5 is connected to the annular groove 3C4 through the second small diameter section 14. The emulsion flows into the low-pressure emulsion hole 5F through the annular groove 3C5, the annular groove 3C4, the connecting hole 3C11, the connecting hole 5C1, the connecting hole 5C, and the internal hole. At the same time, the annular groove 3C3 (high-pressure emulsion hole 3P) is connected to the annular groove 3C2 through the first small diameter section 12. The high-pressure emulsion in the high-pressure emulsion hole 3P is connected to the connecting hole 3C through the annular groove 3C2. The high-pressure emulsion pushes the upper push plate 41 to drive the valve core 4 to rotate in the opposite direction. The low-pressure emulsion hole 5F1 is connected to the first annular groove 44, and the low-pressure emulsion hole 5F is connected to the high-pressure emulsion hole 3P, realizing reverse control.

[0040] This invention employs a spherical valve core structure, simplifying the internal structure of the valve body, reducing the number of parts, and lowering processing and assembly costs. Rotation control of the valve core is achieved through the axial movement of the control rod, resulting in simple operation and fast response. The emulsion flow path is rationally designed, ensuring good sealing and minimal leakage, making it suitable for high-pressure working environments. Its compact structure facilitates installation and maintenance in hydraulic support systems. It is applicable to the modification and upgrading of manual and electro-hydraulic pilot control systems, exhibiting good versatility and applicability.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ball control valve for a hydraulic support, characterized in that, The device includes a valve core, a right valve body, a left valve body, an upper end cap, a lower end cap, and a control rod. The right valve body and the left valve body are assembled together. The valve core is located inside the right valve body and the left valve body. The upper end cap is installed on the top of the assembly of the left valve body and the right valve body, and the lower end cap is installed on the bottom of the assembly of the left valve body and the right valve body. The right valve body has an axial hole. The control rod is axially movable, passing through the upper end cap and extending into the axial hole of the right valve body. The axial movement of the control rod drives the valve core to rotate, thereby switching the flow path of the emulsion in the valve.

2. The hydraulic support ball control valve according to claim 1, characterized in that, The control rod is a stepped column structure, which includes, along the axial direction, a first large diameter segment, a first small diameter segment, a second large diameter segment, a second small diameter segment, and a third large diameter segment.

3. The hydraulic support ball control valve according to claim 2, characterized in that, Five annular grooves are spaced apart along the length of the axial hole. The axial movement of the control rod controls the connection and disconnection between the annular grooves by cooperating with each annular groove through different diameter segments.

4. The hydraulic support ball control valve according to claim 1, characterized in that, The valve core includes a ball, an upper push plate extending outward from the upper part of the ball, and a lower push plate extending outward from the lower part of the ball; the right valve body and the left valve body are respectively provided with spherical grooves that cooperate with the ball on their respective inner sides, and umbrella-shaped holes that respectively accommodate the upper push plate and the lower push plate.

5. The hydraulic support ball control valve according to claim 4, characterized in that, The sphere has a first annular groove and a second annular groove on its left and right sides, and the central angle corresponding to the second annular groove is greater than the central angle corresponding to the first annular groove.

6. The hydraulic support ball control valve according to claim 4, characterized in that, The right valve body is provided with a high-pressure emulsion hole, which penetrates the right valve body and communicates with the internal spherical groove; the left valve body is provided with at least one low-pressure emulsion hole, which communicates with the internal spherical groove.

7. The hydraulic support ball control valve according to claim 6, characterized in that, The left valve body is also provided with a connection hole, which is connected to the spherical groove or low-pressure emulsion hole through an internal pipeline.

8. The hydraulic support ball control valve according to claim 7, characterized in that, The left valve body and the right valve body are fixedly connected by fasteners, and after assembly, the spherical grooves of the two together form a complete chamber to accommodate the valve core, and the cylindrical holes of the two are spliced ​​together to form a complete channel for the valve core central axis to pass through.

9. The hydraulic support ball control valve according to claim 1, characterized in that, The lower end cover is a plate structure used to seal the bottom of the valve body assembly.

10. The method of using the hydraulic support ball control valve according to any one of claims 1-9, characterized in that, include: The connection state of each flow channel in the axial hole of the right valve body is changed by moving the control rod axially. The ball valve core is driven to rotate forward or backward by using the thrust of high-pressure emulsion and changing the connection state. By rotating the valve core, the correspondence between the annular groove on it and the high-pressure and low-pressure emulsion holes on the valve body is switched, thereby controlling the direction of fluid supply to the hydraulic support actuator.

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