Multi-way reversing valve module with bidirectional hydraulic lock function

Abstract

The utility model relates to a multi-way reversing valve module with a bidirectional hydraulic lock function, which is applied to action control of a pushing and pulling oil cylinder of a coal underground drill rig and comprises a valve body, a reversing main valve core, a bidirectional hydraulic lock valve core assembly and a working oil port, the valve body is constructed to be integrally cast, and the reversing main valve core is arranged in a first valve cavity main hole; the two-way hydraulic lock valve element assembly comprises a first hydraulic lock one-way valve element and a second hydraulic lock one-way valve element, and the first hydraulic lock one-way valve element and the second hydraulic lock one-way valve element are constructed to be symmetrically arranged on the two sides of the second valve cavity main hole. The first working oil port is configured to be communicated with the position, corresponding to the second valve cavity main hole, of the first hydraulic lock one-way valve element, and the second working oil port is configured to be communicated with the position, corresponding to the second valve cavity main hole, of the second hydraulic lock one-way valve element. The multi-way reversing valve module with the bidirectional hydraulic lock function is high in integration degree, small in size, small in flow channel pressure loss and capable of achieving cost reduction and efficiency improvement.

Description

Technical Field

[0001] This disclosure relates to the field of multi-way directional valve technology, and more specifically, to a multi-way directional valve module with a bidirectional hydraulic lock function. Background Technology

[0002] The hydraulic cylinders used in coal mine tunnel drilling rigs need to be equipped with load-holding functions during the forward and backward unloaded movement of the power head, as well as during rod advance and retraction, to prevent uncontrolled load loss and potential hazards in the event of hydraulic system failure or pipeline rupture. Therefore, the hydraulic cylinders must be able to remain locked at any position during operation. However, the main control valve (usually a spool valve) has gap leakage and cannot maintain pressure for extended periods, necessitating a two-way hydraulic lock to achieve load holding.

[0003] However, in existing technologies, the bidirectional hydraulic valve body and the reversing valve body are connected by screws, which increases assembly complexity and the risk of leakage at the valve body connection. In addition, the oil port size of the bidirectional hydraulic valve body is fixed, and the rigid connection increases pressure loss, which has a significant impact on the main valve of coal mine drilling rigs with high flow rates. Utility Model Content

[0004] In view of this, the present disclosure provides a multi-way directional valve module with bidirectional hydraulic lock function to solve the technical defects existing in the prior art.

[0005] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0006] This disclosure provides a multi-way directional valve module with bidirectional hydraulic locking function, applied to the motion control of the propulsion and lifting cylinder of a coal mine drilling rig, including:

[0007] The valve body is constructed as a single casting. The valve body is provided with a first valve cavity main hole, a second valve cavity main hole, and a first connecting flow channel and a second connecting flow channel connecting the first valve cavity main hole and the second valve cavity main hole.

[0008] A reversing main valve core is disposed in the main bore of the first valve chamber and is configured to switch the passage between the main bore of the first valve chamber and the first connecting flow channel or the second connecting flow channel.

[0009] A bidirectional hydraulic lock valve core assembly includes a first hydraulic lock check valve core and a second hydraulic lock check valve core, wherein the first and second hydraulic lock check valve cores are symmetrically arranged on both sides of the main bore of the second valve chamber; one end of the first connecting flow channel is configured to connect to the main bore of the first valve chamber, and the other end is configured to connect to the main bore of the second valve chamber at the position corresponding to the first hydraulic lock check valve core; one end of the second connecting flow channel is configured to connect to the main bore of the second valve chamber, and the other end is configured to connect to the main bore of the second valve chamber at the position corresponding to the second hydraulic lock check valve core.

[0010] The system includes two working ports, designated as the first working port and the second working port. The first working port is configured to communicate with the position of the first hydraulic lock check valve core corresponding to the main bore of the second valve chamber, and the second working port is configured to communicate with the position of the second hydraulic lock check valve core corresponding to the main bore of the second valve chamber. The bidirectional hydraulic lock valve core assembly is configured to control the opening and closing of the passage between the main bore of the first valve chamber and the first and second working ports.

[0011] In one embodiment of this disclosure, when the reversing main valve core is in the neutral position, the passages between the first working port and the first working oil port of the first valve chamber main orifice, and between the second working port and the second working oil port, are all locked by a bidirectional hydraulic lock.

[0012] In one embodiment of this disclosure, when the reversing main valve core is in the left position, the second oil inlet and the second working port are connected, and the oil pressure flows from the second oil inlet into the second working port, and opens the second hydraulic lock check valve core through the second connecting flow channel, and enters the oil cylinder to work through the second working oil port.

[0013] In one embodiment of this disclosure, the inlet pressure oil simultaneously acts as pilot oil to open the first hydraulic lock check valve core on the first working oil port side. The oil return from the cylinder flows back to the oil tank through the first working oil port, the first hydraulic lock check valve core, the first connecting flow channel, the first working port, and the first return oil port.

[0014] In one embodiment of this disclosure, when the reversing main valve core is in the right position, the first oil inlet and the first working port are connected, and the oil pressure flows from the first oil inlet into the first working port, and opens the first hydraulic lock check valve core through the first connecting flow channel, and enters the oil cylinder to work through the first working oil port.

[0015] In one embodiment of this disclosure, the inlet pressure oil simultaneously acts as pilot oil to open the second hydraulic lock check valve core on the second working oil port side. The oil return from the cylinder flows back to the oil tank through the second working oil port, the second hydraulic lock check valve core, the second connecting flow channel, the second working port, and the second return oil port.

[0016] In one embodiment of this disclosure, a first push rod valve core and a second push rod valve core are further provided in the main bore of the second valve chamber. The first push rod valve core and the second push rod valve core are respectively provided with a first hydraulic lock check valve core and a second hydraulic lock check valve core, and are configured to push the first hydraulic lock check valve core and the second hydraulic lock check valve core to move respectively.

[0017] In one embodiment of this disclosure, a first spring and a second spring are further provided in the main bore of the second valve chamber. The first spring and the second spring are respectively provided with the first hydraulic lock check valve core and the second hydraulic lock check valve core. The first spring and the second spring are configured to cooperate with the first push rod valve core and the second push rod valve core respectively to push the first hydraulic lock check valve core and the second hydraulic lock check valve core to reset.

[0018] In one embodiment of this disclosure, when the inlet oil pressure is greater than the pre-compression force of the first spring, the inlet oil pressure pushes the first hydraulic lock check valve core to open; when the inlet oil pressure is greater than the pre-compression force of the second spring, the inlet oil pressure pushes the second hydraulic lock check valve core to open; when there is no inlet oil pressure, the reset forces of the first spring and the second spring respectively push the first hydraulic lock check valve core and the second hydraulic lock check valve core to close.

[0019] In one embodiment of this disclosure, a limiting pin is provided between the first push rod valve core and the second push rod valve core, the limiting pin being configured to isolate and limit the extreme movement positions of the push rod valve cores on both sides.

[0020] The multi-way directional valve module with bidirectional hydraulic lock function disclosed herein is integrally cast from the bidirectional hydraulic lock valve body and the directional valve body. This results in a smoother and more seamless connection between the flow channels of the bidirectional hydraulic lock valve body and the directional valve body, minimizing the cavity distance and effectively reducing flow channel pressure loss. This leads to faster response of the bidirectional hydraulic lock and improved system reliability. Furthermore, it eliminates the need for screw connections and oil port seals between the two valve bodies, simplifying machining and assembly processes and preventing oil leakage at the connection surfaces. Integral casting of the valve body minimizes the increase in main valve volume, minimizes the risk of oil leakage, minimizes flow channel pressure loss, simplifies valve body machining and assembly processes, and results in a high degree of main valve integration, low cost, and cost reduction and efficiency improvement, while also meeting the stringent requirements for main unit construction space and operating environment.

[0021] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a multi-way directional valve module with bidirectional hydraulic lock function provided in an embodiment of this disclosure;

[0023] Figure 2 This is a bottom view of a multi-way directional valve module with bidirectional hydraulic lock function provided in an embodiment of this disclosure.

[0024] 1-Valve body; 2-First valve chamber main hole; 3-Second valve chamber main hole; 4-First connecting flow channel; 5-Second connecting flow channel; 6-Reversing main valve core; 7-First hydraulic lock check valve core; 8-Second hydraulic lock check valve core; 9-First working oil port; 10-Second working oil port; 11-First push rod valve core; 12-Second push rod valve core; 13-First spring; 14-Second spring; 15-Limit pin; ①-First oil inlet; ②-Second oil inlet; ③-First working port; ④-Second working port; ⑤-First return oil port; ⑥-Second return oil port; T-Return oil port. Detailed Implementation

[0025] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0026] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0027] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0029] The specific embodiments of this disclosure are described below with reference to the accompanying drawings.

[0030] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0031] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0032] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0033] For ease of understanding, please refer to the following: Figures 1 to 2 The specific structure and working principle of the multi-way directional valve module with bidirectional hydraulic lock function disclosed herein will be described in detail with reference to the embodiments. Figures 1 to 2 As shown, this disclosure provides a multi-way directional valve module with bidirectional hydraulic lock function, applied to the motion control of the propulsion and lifting cylinder of a coal mine drilling rig. It includes a valve body 1, a directional main valve core 6, a bidirectional hydraulic lock valve core assembly, and a working port. The valve body 1 is integrally cast and contains a first valve chamber main hole 2, a second valve chamber main hole 3, and a first connecting flow channel 4 and a second connecting flow channel 5 connecting the first valve chamber main hole 2 and the second valve chamber main hole 3. The directional main valve core 6 is disposed within the first valve chamber main hole 2 and is configured to switch the passage between the first valve chamber main hole 2 and either the first connecting flow channel 4 or the second connecting flow channel 5. The bidirectional hydraulic lock valve core assembly includes a first hydraulic lock check valve core 7 and a second hydraulic lock check valve core 8, which are symmetrically arranged in the second valve chamber. On both sides of the main hole 3; one end of the first connecting flow channel 4 is configured to connect to the first valve chamber main hole 2, and the other end is configured to connect to the second valve chamber main hole 3 corresponding to the position of the first hydraulic lock check valve core 7; one end of the second connecting flow channel 5 is configured to connect to the second valve chamber main hole 3, and the other end is configured to connect to the second valve chamber main hole 3 corresponding to the position of the second hydraulic lock check valve core 8; two working ports are provided, respectively denoted as the first working port 9 and the second working port 10; wherein, the first working port 9 is configured to communicate with the position of the first hydraulic lock check valve core 7 corresponding to the second valve chamber main hole 3, and the second working port 10 is configured to communicate with the position of the second hydraulic lock check valve core 8 corresponding to the second valve chamber main hole 3; the bidirectional hydraulic lock valve core assembly is configured to control the opening and closing of the passage between the first valve chamber main hole 2 and the first working port 9 and the second working port 10.

[0034] Specifically, the valve body 1, as the basic framework of the entire multi-way directional valve module with bidirectional hydraulic locking function, not only supports all internal components but also ensures structural robustness and sealing through integral casting. The valve body 1 contains a first valve chamber main bore 2, a second valve chamber main bore 3, a first connecting flow channel 4, and a second connecting flow channel 5. These chambers and channels constitute the basic path for oil flow. The directional valve core 6 is located within the first valve chamber main bore 2 and is responsible for switching the passage between the first valve chamber main bore 2 and the first connecting flow channel 4 and the second connecting flow channel 5. By switching the directional valve core 6 between left and right positions, the direction of the inlet pressure oil from the first valve chamber main bore 2 to the connecting flow channel can be changed, thus affecting the final destination of the inlet pressure oil at the working port.

[0035] When the main directional valve core 6 is in the left position, the inlet pressure oil enters the second working port ④ from the second inlet port ②, then enters the second connecting channel 5 through the second working port ④, and enters the cylinder through the second hydraulic lock check valve core 8 and the second working port 10. The cylinder return oil enters the first hydraulic lock check valve core 7 and the first connecting channel 4 through the first working port 9, and then enters the first return port ⑤ from the first working port ③ connected to the first connecting channel 4, and finally returns to the oil tank from the first return port ⑤. When the main directional valve core is in the right position, the inlet pressure oil enters the first working port ③ from the first inlet port ①, then enters the first connecting channel 4 through the first working port ③, and enters the cylinder through the first hydraulic lock check valve core 7 and the first working port 9. The cylinder return oil enters the second hydraulic lock check valve core 8 and the second connecting channel 5 through the second working port 10, and then enters the second return port ⑥ from the second working port ④ connected to the second connecting channel 5, and finally returns to the oil tank from the second return port ⑥.

[0036] When the hydraulic cylinder needs to perform an advancing or withdrawing action, the external force of the handle causes the main reversing valve core 6 to switch to the left or right position, thereby opening the corresponding port and flow channel, allowing the inlet pressure oil to enter or flow out of the hydraulic cylinder, realizing the extension and retraction movement of the hydraulic cylinder. The specific reversing motion process can be referred to the above content, and will not be repeated here.

[0037] The working ports are the channels for hydraulic fluid to enter and exit the hydraulic cylinder. They are divided into a first working port 9 and a second working port 10, which are respectively connected to the positions of the first hydraulic lock check valve core 7 and the second hydraulic lock check valve core 8 in the main bore 3 of the second valve chamber. Hydraulic fluid enters or leaves the hydraulic cylinder through the working ports, thereby pushing the piston rod to extend or retract. Specifically, when the reversing main valve core 6 is reversed to the left position, the inlet pressure oil will enter the hydraulic cylinder through the second working port 10; when the reversing main valve core 6 is reversed to the right position, the inlet pressure oil will enter the hydraulic cylinder through the first working port 9. Simultaneously, the bidirectional hydraulic lock valve core assembly plays a role in locking the hydraulic cylinder position during this process, ensuring the safety and accuracy of operation.

[0038] In one embodiment of this disclosure, when the reversing main valve core 6 is in the neutral position, the passages between the first working port ③ and the first working oil port 9, and between the second working port ④ and the second working oil port 10 of the first valve chamber main hole 2 are all locked by a bidirectional hydraulic lock.

[0039] Specifically, in the initial state, the reversing main valve core 6 is in the neutral position. At this time, the first working port ③ of the first valve chamber main hole 2 is not connected to the first connecting flow channel 4, the second working port ④, and the second connecting flow channel 5. The first hydraulic lock check valve core 7 and the second hydraulic lock check valve core 8 are both in the closed state, preventing the flow of oil between the first valve chamber main hole 2 and the first working oil port 9 and the second working oil port 10. Therefore, no inlet pressure oil enters the cylinder to work. The oil in the cylinder is completely locked, the piston rod cannot move, and the cylinder remains in its current position.

[0040] In summary, when the reversing main valve core 6 is in the neutral position, the bidirectional hydraulic lock valve core assembly ensures that the passage between the first valve chamber main hole 2 and the first working oil port 9 and the second working oil port 10 is closed, thereby locking the position of the oil cylinder, preventing any accidental movement, and ensuring the stability and safety of the oil cylinder when it is not needed to move.

[0041] In one embodiment of this disclosure, when the reversing main valve core 6 is in the left position, the second oil inlet ② and the second working port ④ are connected, and the oil pressure flows from the second oil inlet ② into the second working port ④, flows through the second connecting flow channel 5 to open the second hydraulic lock check valve core 8, and enters the oil cylinder through the second working oil port 10 to work.

[0042] Specifically, when the main reversing valve core 6 reverses from the middle position to the left position, the passage between the second working port ④ and the second connecting flow channel 5 is opened. The inlet pressure oil enters the second working port ④ through the second inlet port ②, then enters the second connecting flow channel 5, and continues to flow to the main bore 3 of the second valve chamber. The inlet pressure oil reaches the position of the second hydraulic lock check valve core 8 in the main bore 3 of the second valve chamber through the second connecting flow channel 5. Due to the pressure of the inlet pressure oil, the second hydraulic lock check valve core 8 is pushed open, and the inlet pressure oil enters the rod chamber of the cylinder through the second working port 10, pushing the piston rod to retract and realizing the lifting action of the cylinder. A portion of the inlet pressure oil simultaneously acts as pilot oil to reverse and open the first hydraulic lock check valve core 7, allowing the cylinder return oil to flow back to the oil tank through the first working port 9, the first hydraulic lock check valve core 7, the first connecting flow channel 4, the first working port ③, and the first return port ⑤.

[0043] In summary, when the reversing main valve core 6 is in the left position, the inlet pressure oil enters the second valve chamber main hole 3 from the second working port ④ of the first valve chamber main hole 2 through the second connecting flow channel 5, opening the second hydraulic lock check valve core 8, allowing the inlet pressure oil to enter the rod chamber of the cylinder for operation. Simultaneously, a portion of the inlet pressure oil acts as pilot oil, reversing the flow to open the first hydraulic lock check valve core 7, thereby causing the cylinder return oil to flow back to the oil tank, ensuring the smooth lifting action of the cylinder.

[0044] In one embodiment of this disclosure, the inlet pressure oil also serves as pilot oil to open the first hydraulic lock check valve core 7 on the first working oil port 9 side. The oil return from the cylinder flows back to the oil tank through the first working oil port 9, the first hydraulic lock check valve core 7, the first connecting flow channel 4, the first working port ③, and the first return oil port ⑤.

[0045] In one embodiment of this disclosure, when the reversing main valve core 6 is in the right position, the first oil inlet ① and the first working port ③ are connected, and the oil pressure flows from the first oil inlet ① into the first working port ③, flows through the first connecting flow channel 4 to open the first hydraulic lock check valve core 7, and enters the oil cylinder through the first working oil port 9 to work.

[0046] Specifically, when the reversing main valve core 6 reverses from the neutral position to the right position, the passage between the first working port ③ and the first connecting flow channel 4 is opened. The inlet pressure oil enters the first working port ③ through the first inlet port ①, then enters the first connecting flow channel 4, and continues to flow to the second valve chamber main hole 3. The inlet pressure oil reaches the position of the first hydraulic lock check valve core 7 in the second valve chamber main hole 3 through the first connecting flow channel 4. Due to the pressure of the inlet pressure oil, the first hydraulic lock check valve core 7 is pushed open, and the inlet pressure oil enters the rodless chamber of the cylinder through the first working port 9, pushing the piston rod to extend and realizing the cylinder's thrust action. A portion of the inlet pressure oil simultaneously acts as pilot oil, entering one side of the second push rod valve core 12, causing it to push the second hydraulic lock check valve core 8 to open in the opposite direction. This allows the cylinder return oil to flow back to the oil tank through the second working port 10, the second hydraulic lock check valve core 8, the second connecting flow channel 5, the second working port ④, and the second return port ⑥.

[0047] In summary, when the reversing main valve core 6 is in the right position, the inlet pressure oil enters the second valve chamber main hole 3 from the first working port ③ of the first valve chamber main hole 2 through the first connecting flow channel 4, opening the first hydraulic lock check valve core 7 and allowing the inlet pressure oil to enter the rodless chamber of the cylinder to work. At the same time, part of the inlet pressure oil enters the second push rod valve core 12 as pilot oil, causing it to push the second hydraulic lock check valve core 8 to open in the reverse direction, thereby allowing the cylinder return oil to flow back to the oil tank, ensuring the smooth advancement of the cylinder.

[0048] In one embodiment of this disclosure, the inlet pressure oil simultaneously acts as pilot oil to open the second hydraulic lock check valve core 8 on the second working oil port 10 side. The oil return from the cylinder flows back to the oil tank through the second working oil port 10, the second hydraulic lock check valve core 8, the second connecting flow channel 5, the second working port ④, and the second return oil port ⑥.

[0049] like Figure 1 As shown, in one embodiment of this disclosure, a first push rod valve core 11 and a second push rod valve core 12 are further provided in the main hole 3 of the second valve chamber. The first push rod valve core 11 and the second push rod valve core 12 are respectively provided with the first hydraulic lock one-way valve core 7 and the second hydraulic lock one-way valve core 8, and are configured to push the first hydraulic lock one-way valve core 7 and the second hydraulic lock one-way valve core 8 to move respectively.

[0050] Specifically, the first push rod valve core 11 is located within the main bore 3 of the second valve chamber, near the first hydraulic lock check valve core 7. Inlet pressure oil directly opens the second hydraulic lock check valve core 8, entering the cylinder for operation. Simultaneously, a portion of the inlet pressure oil acts as pilot oil, entering one side of the first push rod valve core 11, causing it to push the first hydraulic lock check valve core 7 to open in the reverse direction, thus allowing oil to return from the cylinder. The second push rod valve core 12 is located within the main bore 3 of the second valve chamber, near the second hydraulic lock check valve core 8. Inlet pressure oil directly opens the first hydraulic lock check valve core 7, entering the cylinder for operation. Simultaneously, a portion of the inlet pressure oil acts as pilot oil, entering one side of the second push rod valve core 12, causing it to push the second hydraulic lock check valve core 8 to open in the reverse direction, thus allowing oil to return from the cylinder. By operating the first push rod valve core 11 or the second push rod valve core 12, the smooth flow path of the oil during cylinder operation is ensured, thereby achieving rapid response of the cylinder.

[0051] like Figure 1 As shown, in one embodiment of this disclosure, a first spring 13 and a second spring 14 are also provided in the main hole 3 of the second valve chamber. The first spring 13 and the second spring 14 are respectively provided with the first hydraulic lock one-way valve core 7 and the second hydraulic lock one-way valve core 8. The first spring 13 and the second spring 14 are configured to cooperate with the first push rod valve core 11 and the second push rod valve core 12 respectively to push the first hydraulic lock one-way valve core 7 and the second hydraulic lock one-way valve core 8 to reset.

[0052] Specifically, the first spring 13 is also disposed in the main bore 3 of the second valve chamber, corresponding to the first hydraulic lock check valve core 7. In the absence of inlet oil pressure, the first spring 13 presses the first hydraulic lock check valve core 7 against the corresponding valve port, preventing the oil from flowing backward; similarly, the second spring 14 also presses the second hydraulic lock check valve core 8 against the corresponding valve port, achieving the same effect.

[0053] In one embodiment of this disclosure, when the inlet oil pressure is greater than the pre-compression force of the first spring 13, the inlet oil pressure pushes the first hydraulic lock check valve core 7 to open; when the inlet oil pressure is greater than the pre-compression force of the second spring 14, the inlet oil pressure pushes the second hydraulic lock check valve core 8 to open; when there is no inlet oil pressure, the reset forces of the first spring 13 and the second spring 14 respectively push the first hydraulic lock check valve core 7 and the second hydraulic lock check valve core 8 to close.

[0054] In one embodiment of this disclosure, a limiting pin 15 is provided between the first push rod valve core 11 and the second push rod valve core 12. The limiting pin 15 is configured to isolate and limit the extreme movement positions of the push rod valve cores on both sides.

[0055] Specifically, the limiting pin 15 is positioned between the first push rod valve core 11 and the second push rod valve core 12. The limiting pin 15 isolates and restricts the relative movement of the first push rod valve core 11 and the second push rod valve core 12, ensuring that under hydraulic pressure, the two push rod valve cores do not interfere with each other and each independently controls its corresponding hydraulic lock check valve core. Even under the action of inlet pressure oil, the limiting pin 15 maintains the independent movement of the two push rod valve cores, preventing mechanical interference between the first push rod valve core 11 and the second push rod valve core 12, and ensuring the stability and reliability of the system. Furthermore, a pilot oil passage shared by the first push rod valve core 11 and the second push rod valve core 12 is provided here. The pilot oil pressure acts through this passage on one side of the first push rod valve core 11 or the other side of the second push rod valve core 12, causing the first hydraulic lock check valve core 7 or the second hydraulic lock check valve core 8 to open in the reverse direction.

[0056] The multi-way directional valve module with bidirectional hydraulic lock function disclosed herein is integrally cast from the bidirectional hydraulic lock valve body and the directional valve body. This results in a smoother and more seamless connection between the flow channels of the bidirectional hydraulic lock valve body and the directional valve body, minimizing the cavity distance and effectively reducing flow channel pressure loss. This leads to faster response of the bidirectional hydraulic lock and improved system reliability. Furthermore, it eliminates the need for screw connections and oil port seals between the two valve bodies, simplifying machining and assembly processes and preventing oil leakage at the connection surfaces. Integral casting of the valve body minimizes the increase in main valve volume, minimizes the risk of oil leakage, minimizes flow channel pressure loss, simplifies valve body machining and assembly processes, and results in a high degree of main valve integration, low cost, and cost reduction and efficiency improvement, while also meeting the stringent requirements for main unit construction space and operating environment.

[0057] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this disclosure is not limited to the described order of actions, because according to this disclosure, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this disclosure.

[0058] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0059] The preferred embodiments disclosed above are merely illustrative of this disclosure. The optional embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this disclosure. These embodiments are selected and specifically described in this disclosure to better explain the principles and practical applications of this disclosure, thereby enabling those skilled in the art to better understand and utilize this disclosure. This disclosure is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-way reversing valve module with bidirectional hydraulic lock function, applied to the action control of the propelling and pulling oil cylinder of a coal drift drill, characterized in that, The application relates to a valve body (1) which is integrally cast and is internally provided with a first valve cavity main hole (2), a second valve cavity main hole (3), a first connecting flow channel (4) and a second connecting flow channel (5) which are connected with the first valve cavity main hole (2) and the second valve cavity main hole (3); a reversing main valve core (6) which is arranged in the first valve cavity main hole (2) and is configured to switch the passage between the first valve cavity main hole (2) and the first connecting flow channel (4) or the second connecting flow channel (5); a bidirectional hydraulic lock valve core assembly which comprises a first hydraulic lock one-way valve core (7) and a second hydraulic lock one-way valve core (8) which are symmetrically arranged on both sides of the second valve cavity main hole (3); one end of the first connecting flow channel (4) is configured to be connected with the first valve cavity main hole (2) and the other end is configured to be connected with the second valve cavity main hole (3) corresponding to the position of the first hydraulic lock one-way valve core (7); one end of the second connecting flow channel (5) is configured to be connected with the second valve cavity main hole (3) and the other end is configured to be connected with the second valve cavity main hole (3) corresponding to the position of the second hydraulic lock one-way valve core (8); two working oil ports are arranged, which are respectively a first working oil port (9) and a second working oil port (10); the first working oil port (9) is configured to be communicated with the position of the first hydraulic lock one-way valve core (7) corresponding to the second valve cavity main hole (3) and the second working oil port (10) is configured to be communicated with the position of the second hydraulic lock one-way valve core (8) corresponding to the second valve cavity main hole (3); the bidirectional hydraulic lock valve core assembly is configured to control the opening and closing of the passage between the first valve cavity main hole (2) and the first working oil port (9) and the second working oil port (10). When the reversing main valve core (6) is in the neutral position, the passages between the first working port (3) of the first valve cavity main hole (2) and the first working oil port (9) and the second working port (4) of the first valve cavity main hole (2) and the second working oil port (10) are locked by the bidirectional hydraulic lock. When the reversing main valve core (6) is in the left position, the second oil inlet port (2) and the second working port (4) are communicated, the oil inlet pressure oil flows into the second working port (4) from the second oil inlet port (2), opens the second hydraulic lock one-way valve core (8) through the second connecting flow channel (5) and enters the oil cylinder through the second working oil port (10). The oil inlet pressure oil simultaneously opens the first hydraulic lock one-way valve core (7) on the side of the first working oil port (9) as pilot oil, the oil cylinder return oil returns to the oil tank through the first working oil port (9), the first hydraulic lock one-way valve core (7), the first connecting flow channel (4), the first working port (3) and the first return oil port (5). ​ 2. The multi-way directional valve module with bidirectional hydraulic lock function according to claim 1, characterized in that, ​ 3. The multi-way directional valve module with bi-directional hydraulic lock function according to claim 1, characterized in that, ​ 4. The multi-way directional valve module with bi-directional hydraulic lock function according to claim 3, characterized in that, ​ 5. The multi-way directional valve module with bi-directional hydraulic lock function according to claim 1, wherein, When the commutating main valve core (6) is in the right position, the first oil inlet port (①) and the first working port (③) are connected, the oil inlet pressure oil flows into the first working port (③) from the first oil inlet port (①), and the first hydraulic lock one-way valve core (7) is opened through the first connecting flow channel (4), and enters the cylinder through the first working oil port (9).

6. The multi-way directional valve module with bi-directional hydraulic lock function according to claim 5, characterized in that, The oil inlet pressure oil simultaneously opens the second hydraulic lock one-way valve core (8) on the side of the second working oil port (10) as a pilot oil, and the cylinder back oil flows back to the oil tank through the second working oil port (10), the second hydraulic lock one-way valve core (8), the second connecting flow channel (5), and the second working port (④) and the second back oil port (⑥).

7. The multi-way directional valve module with bi-directional hydraulic lock function according to claim 1, characterized in that, The second valve cavity main hole (3) is also provided with a first push rod valve core (11) and a second push rod valve core (12), the first push rod valve core (11) and the second push rod valve core (12) are correspondingly arranged with the first hydraulic lock one-way valve core (7) and the second hydraulic lock one-way valve core (8), and are configured to respectively push the first hydraulic lock one-way valve core (7) and the second hydraulic lock one-way valve core (8) to move.

8. The multi-way directional valve module with bi-directional hydraulic lock function according to claim 7, characterized in that, The second valve cavity main hole (3) is also provided with a first spring (13) and a second spring (14), the first spring (13) and the second spring (14) are correspondingly arranged with the first hydraulic lock one-way valve core (7) and the second hydraulic lock one-way valve core (8), and the first spring (13) and the second spring (14) are configured to cooperate with the first push rod valve core (11) and the second push rod valve core (12) respectively, and push the first hydraulic lock one-way valve core (7) and the second hydraulic lock one-way valve core (8) to reset.

9. The multi-way directional valve module with bi-directional hydraulic lock function according to claim 8, characterized in that, When the oil inlet pressure is greater than the pre-compression force of the first spring (13), the oil inlet pressure oil pushes the first hydraulic lock one-way valve core (7) to open; when the oil inlet pressure is greater than the pre-compression force of the second spring (14), the oil inlet pressure oil pushes the second hydraulic lock one-way valve core (8) to open; when there is no oil inlet pressure, the reset force of the first spring (13) and the second spring (14) respectively pushes the first hydraulic lock one-way valve core (7) and the second hydraulic lock one-way valve core (8) to close.

10. The multi-way directional valve module with bi-directional hydraulic lock function according to claim 8, characterized in that, A limiting pin (15) is arranged between the first push rod valve core (11) and the second push rod valve core (12), and the limiting pin (15) is configured to isolate and limit the extreme movement position of the two push rod valve cores.

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