Reversing valve with position detection function
By introducing a position detection mechanism into the hydraulic directional valve, the position of the transition valve core is indirectly detected to determine the position of the main valve core, which solves the problems of complex main valve core detection and inconvenient maintenance, and achieves structural simplification and improved maintenance efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING HUADE HYDRAULIC INDAL GROUP
- Filing Date
- 2025-06-09
- Publication Date
- 2026-04-21
AI Technical Summary
The existing main valve core detection method in hydraulic directional valves is complex and inconvenient to maintain, resulting in low detection and maintenance efficiency.
Design a directional valve with position detection. By setting a main valve chamber, a detection valve chamber and a detection channel in the valve body, the main valve core is driven by a transition valve core and a drive mechanism, and the position of the transition valve core is indirectly detected by a position detection mechanism. The detection signal is output to determine the position of the main valve core.
The structure of the main valve core has been simplified, the processing difficulty has been reduced, the efficiency of inspection and maintenance has been improved, the failure rate has been reduced, and the safety and reliability of the equipment have been enhanced.
Smart Images
Figure CN224149877U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of hydraulic equipment, and more specifically, to a directional valve with position detection. Background Technology
[0002] Directional control valves are core components of industrial control systems, widely used in hydraulic systems such as injection molding machines and construction machinery where enhanced safety is required. They are primarily used to control the opening, closing, and reversing of oil circuits in hydraulic systems. In precision control scenarios, the reversing speed and positional accuracy of hydraulic directional control valves directly affect equipment performance. Therefore, real-time and accurate detection of the valve spool position is a crucial technical aspect for ensuring reliable system operation. Currently, the mainstream technical solution is to directly detect the position of the main valve spool to determine its operating status. However, the main valve spool typically integrates multiple functions, has a complex structure, and is difficult to repair and replace, resulting in low detection and maintenance efficiency.
[0003] Therefore, how to solve the problems of complex main valve core detection methods and inconvenient maintenance, so as to improve the convenience of detection and the maintainability of the system, has become an urgent problem to be solved. Utility Model Content
[0004] This disclosure provides a directional valve with position detection to address the problems existing in the prior art.
[0005] According to a first aspect of this disclosure, a directional valve with position detection is provided, comprising:
[0006] The valve body contains a main valve chamber and a detection valve chamber that are interconnected. The valve body also includes...
[0007] A detection channel for detecting the connection of the valve chamber;
[0008] The main valve core extends along the first axis and is configured to be movably disposed within the main valve chamber;
[0009] The transition valve core is movably disposed within the detection valve cavity and is configured to drive and cooperate with the main valve core.
[0010] A drive mechanism is configured to drive a transition valve core to move relative to a detection valve chamber, such that the transition valve core drives the main valve core to move relative to the main valve chamber along a first axis.
[0011] The position detection mechanism is mounted on the valve body. The detection end of the position detection mechanism is configured to extend into the detection channel to detect the displacement of the transition valve core.
[0012] In one embodiment of this disclosure, two detection valve chambers are provided, which are respectively referred to as the first detection valve chamber and the second detection valve chamber located on opposite sides of the main valve core;
[0013] The transition valve core is constructed to have two parts, referred to as the first transition valve core that is movably engaged with the first detection valve chamber and the second transition valve core that is movably engaged with the second detection valve chamber.
[0014] The drive mechanism is constructed to have two parts, referred to as the first drive mechanism that cooperates with the first transition valve core and the second drive mechanism that movably cooperates with the second transition valve core.
[0015] The position detection mechanism is configured to have two parts, referred to as the first position detection mechanism and the second position detection mechanism, respectively. The first position detection mechanism is configured to detect the position of the first transition valve core, and the second position detection mechanism is configured to detect the position of the second transition valve core.
[0016] In one embodiment of this disclosure, the valve body is provided with an oil inlet, an oil return port, a first working oil port, and a second working oil port; the main valve core is configured to move between a first position and a second position. When in the first position, the main valve core is configured to open a first passage between the oil inlet and the first working oil port, and to open a second passage between the second working oil port and the oil outlet.
[0017] When in the second position, the main valve core is configured to open a third passage between the inlet and the second working port, and a fourth passage between the first working port and the outlet.
[0018] In one embodiment of this disclosure, when the main valve core moves to a first position, the first position detection mechanism is configured to detect the position of the first transition valve core.
[0019] In one embodiment of this disclosure, when the main valve core moves to the second position, the second position detection mechanism is configured to detect the position of the second transition valve core.
[0020] In one embodiment of this disclosure, there is a third position between the first position and the second position. When the main valve core moves to the third position, the first passage, the second passage, the third passage and the fourth passage are all disconnected.
[0021] In one embodiment of this disclosure, a first detection valve chamber is provided with a first elastic component, and a second detection valve chamber is provided with a second elastic component; the first elastic component cooperates with a first transition valve core, providing a preload force to the first transition valve core to move in the direction of the third position; the second elastic component cooperates with a second transition valve core, providing a preload force to the second transition valve core to move in the direction of the third position.
[0022] When the first drive mechanism and the second drive mechanism stop working, the main valve core is configured to remain in the third position under the action of the first elastic component and the second elastic component.
[0023] In one embodiment of this disclosure, the first transition valve core and the second transition valve core are provided with grooves at one end near the main valve core, and the end of the main valve core connected to the first transition valve core and the second transition valve core is provided with protrusions that match the grooves.
[0024] In one embodiment of this disclosure, the first position detection mechanism and the second position detection mechanism are respectively a first proximity switch and a second proximity switch. The outer circumference of the first transition valve core and the second transition valve core are provided with annular bosses corresponding to the sensing areas of the first proximity switch and the second proximity switch. When the main valve core moves to the first position, the annular boss of the first transition valve core enters the sensing area of the first proximity switch; when the main valve core moves to the second position, the annular boss of the second transition valve core enters the sensing area of the second proximity switch to trigger the proximity switch to output a detection signal.
[0025] In one embodiment of this disclosure, the valve body includes a main valve body and a first transition block and a second transition block located on opposite sides of the main valve body; wherein, the main valve cavity is disposed within the main valve body, the first detection valve cavity and the second detection valve cavity are respectively disposed within the first transition block and the second transition block, and the main valve body is detachably connected to the first transition block and the second transition block respectively.
[0026] This disclosure provides a directional control valve with position detection, which includes at least a valve body, a main valve core, a transition valve core, a drive mechanism, and a position detection mechanism. The valve body has a main valve chamber and a detection valve chamber that are interconnected, and also has a detection channel communicating with the detection valve chamber. The main valve core extends along a first axis and is movably disposed within the main valve chamber. The transition valve core is disposed within the detection valve chamber and is driven by the main valve core. The drive mechanism drives the transition valve core to move relative to the detection valve chamber, thereby causing the transition valve core to drive the main valve core to move relative to the main valve chamber along the first axis. The position detection mechanism is mounted on the valve body, and its detection end extends into the detection channel to detect the displacement of the transition valve core.
[0027] Thus, when the position detection-equipped directional valve drive mechanism of this disclosure is in operation, the drive mechanism drives the transition valve core to move within the detection valve chamber, thereby causing the main valve core to reciprocate along the first axis within the main valve chamber. When the transition valve core enters the sensing area of the position detection mechanism, the main valve core reaches the predetermined reversing position. At this time, the position detection mechanism outputs a detection signal, which the operator can use to determine that the oil circuit reversal is complete. This disclosure can indirectly determine the position of the main valve core by detecting the position of the transition valve core, eliminating the need for an integrated detection module in the main valve core, reducing the structural complexity of the main valve core, lowering the manufacturing difficulty, and improving the efficiency of detection and maintenance.
[0028] 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
[0029] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.
[0030] Figure 1 This is a schematic diagram of the structure of a directional valve with position detection provided in an embodiment of this disclosure;
[0031] Figure 2 This is a cross-sectional structural diagram of a reversing valve with position detection provided in an embodiment of this disclosure;
[0032] Figure 3 This is a cross-sectional view of the transition valve core of the directional valve with position detection provided in an embodiment of this disclosure.
[0033] Figures 1 to 3 The correspondence between the component names and the reference numerals in the figures is as follows:
[0034] 1. Valve body; 11. Main valve body; 111. Main valve chamber; 1111. Oil inlet; 1112. Oil outlet; 12. Transition block; 1201. First transition block; 1202. Second transition block; 121. Detection valve chamber; 1211. First detection valve chamber; 1212. Second detection valve chamber; 122. Detection channel; 1221. First detection channel; 1222. Second detection channel; 1231. First drive connection port; 1232. Second drive connection port; 2 1. Main valve core; 3. Transition valve core; 31. First transition valve core; 311. First boss; 312. First groove; 32. Second transition valve core; 321. Second boss; 322. Second groove; 4. Drive mechanism; 41. First drive mechanism; 42. Second drive mechanism; 5. Position detection mechanism; 51. First position detection mechanism; 52. Second position detection mechanism; 6. Elastic component; 61. First elastic component; 62. Second elastic component; 7. Screw. Detailed Implementation
[0035] 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 specifically stated otherwise, 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. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0036] Numerous specific details are set forth in the following description to provide a full understanding of this disclosure. However, this disclosure can be implemented in many other ways than those described herein, and similar extensions can be made by those skilled in the art without departing from the spirit of this disclosure; therefore, this disclosure is not limited to the specific implementations disclosed below. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.
[0037] The terminology used in one or more embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of this disclosure. The singular forms “a,” “the,” and “the” as used in one or more embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in one or more embodiments of this disclosure refers to and includes any or all possible combinations of one or more associated listed items.
[0038] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this disclosure, and similarly, second may also be referred to as first. Depending on the context, the word “if” as used herein may be interpreted as “when”, “in response to a determination”, or “upper”, “lower”, “front”, “back”, “left”, “right”, etc., are used only to indicate the relative positional relationship between related parts, and not to define the absolute position of these related parts. In this document, “equal”, “same”, etc., are not strict mathematical and / or geometric limitations, and also include errors that are understandable to those skilled in the art and permissible in manufacturing or use. Unless otherwise stated, numerical ranges in this document include not only the entire range within its two endpoints, but also several sub-ranges contained therein.
[0039] This disclosure provides a directional control valve with position detection, which includes at least a valve body, a main valve core, a transition valve core, a drive mechanism, and a position detection mechanism. The valve body has a main valve chamber and a detection valve chamber that are interconnected, and also has a detection channel communicating with the detection valve chamber. The main valve core extends along a first axis and is movably disposed within the main valve chamber. The transition valve core is disposed within the detection valve chamber and is driven by the main valve core. The drive mechanism drives the transition valve core to move relative to the detection valve chamber, thereby causing the transition valve core to drive the main valve core to move relative to the main valve chamber along the first axis. The position detection mechanism is mounted on the valve body, and its detection end extends into the detection channel to detect the displacement of the transition valve core.
[0040] Thus, when the directional valve drive mechanism with position detection of this disclosure is in operation, the drive mechanism can drive the transition valve core to move relative to the detection valve chamber, so that the transition valve core drives the main valve core to move relative to the main valve chamber along the first axis. When the transition valve core moves to the sensing area of the position detection mechanism, the main valve core is driven to move to the preset position indicating that the oil circuit directional change is in place. At this time, the position detection mechanism outputs a detection signal, and the operator can know that the oil circuit directional change has been completed. This disclosure can indirectly determine the position of the main valve core by detecting the position of the transition valve core, so that the main valve core does not need to integrate a detection module, reducing the structural complexity of the main valve core, reducing the processing difficulty, and improving the efficiency of detection and maintenance.
[0041] For ease of understanding, please refer to the following: Figures 1 to 3 The specific structure and working principle of the reversing valve with position detection disclosed herein will be described in detail with reference to an embodiment.
[0042] This disclosure provides a directional control valve with position detection, which can be applied to hydraulic systems in ships, injection molding machines, construction machinery, and other applications requiring enhanced safety. The valve's operation is monitored by a position detection mechanism, providing signals for diagnosing hydraulic circuit faults and ensuring the safety of actuators. In a specific embodiment of this disclosure, the maximum pressure of the directional control valve can be 31.5 MPa, and the maximum flow rate can be 80 L / min.
[0043] like Figure 1 As shown, the directional control valve includes at least a valve body 1, a main valve core 2, a transition valve core 3, a drive mechanism 4, and a position detection mechanism 5. The valve body 1 contains a main valve chamber 111 and a detection valve chamber 121 that are interconnected, and also includes a detection channel 122 communicating with the detection valve chamber 121. The main valve core 2 extends along a first axis and is movably disposed within the main valve chamber 111. The transition valve core 3 is disposed within the detection valve chamber 121 and is in transmission cooperation with the main valve core 2. The drive mechanism 4 drives the transition valve core 3 to move relative to the detection valve chamber 121, thereby causing the transition valve core 3 to drive the main valve core 2 to move relative to the main valve chamber 111 along the first axis. The position detection mechanism 5 is mounted on the valve body 1, and its detection end extends into the detection channel 122 to detect the displacement of the transition valve core 3.
[0044] Thus, when the position detection directional valve drive mechanism 4 of this disclosure is working, the drive mechanism 4 drives the transition valve core 3 to move away from the drive mechanism 4, thereby driving the main valve core 2 to move, realizing the switching of the position of the main valve core 2, and thus realizing the opening and closing of the oil circuit inside the control valve body 1, realizing the reversal of the hydraulic system oil circuit. This disclosure can indirectly determine the position of the main valve core 2 by detecting the position of the transition valve core 3, so that the main valve core 2 does not need to integrate a detection module, reducing the structural complexity of the main valve core 2, reducing the processing difficulty, and improving the efficiency of detection and maintenance.
[0045] like Figure 1 and Figure 2 As shown, in a specific embodiment of this disclosure, the reversing valve has two detection valve chambers 121, which are respectively referred to as the first detection valve chamber 1211 and the second detection valve chamber 1212 located on opposite sides of the main valve core 2; there are two transition valve cores 3, which are respectively referred to as the first transition valve core 31 that is movably engaged with the first detection valve chamber 1211 and the second transition valve core 32 that is movably engaged with the second detection valve chamber 1212; there are two drive mechanisms 4, which are respectively referred to as the first drive mechanism 41 that is engaged with the first transition valve core 31 and the second drive mechanism 42 that is movably engaged with the second transition valve core 32; there are two position detection mechanisms 5, which are respectively referred to as the first position detection mechanism 51 whose detection end extends into the first detection channel 1221 and the second position detection mechanism 52 whose detection end extends into the second detection channel 1222. The first position detection mechanism 51 detects the position of the first transition valve core 31, and the second position detection mechanism 52 detects the position of the second transition valve core 32.
[0046] Specifically, when the first drive mechanism 41 of the directional valve with position detection disclosed herein is operating, the first drive mechanism 41 drives the first transition valve core 31 to move away from the first drive mechanism 41, causing the main valve core 2 to move in the same direction, thereby causing the second transition valve core 32 to move in the same direction. When the second transition valve core 32 moves to the sensing area of the second position detection mechanism 52, the second position detection mechanism 52 outputs a detection signal.
[0047] Similarly, when the second drive mechanism 42 is working, it drives the second transition valve core 32 to move away from the second drive mechanism 42, causing the main valve core 2 to move in the same direction, thereby causing the first transition valve core 31 to move in the same direction. When the first transition valve core 31 moves to the sensing area of the first position detection mechanism 51, the first position detection mechanism 51 outputs a detection signal. During the reciprocating motion of the main valve core 2 of the directional valve with position detection disclosed in this invention, both detection valve chambers 121 can independently detect the position of the transition valve core 3, which is more accurate than hydraulic valves that can only detect from one side.
[0048] like Figure 1 and Figure 2 As shown, the valve body 1 of the directional valve with position detection disclosed herein is provided with an oil inlet 1111, an oil return port 1112, a first working port, and a second working port. The main valve core 2 is configured to move between a first position and a second position. When in the first position, the main valve core 2 opens a first passage between the oil inlet 1111 and the first working port, and opens a second passage between the second working port and the oil outlet 1112. When in the second position, the main valve core 2 opens a third passage between the oil inlet 1111 and the second working port, and opens a fourth passage between the first working port and the oil outlet 1112.
[0049] Specifically, during the operation of the directional control valve with position detection disclosed herein, the main valve core 2 can move between a first position and a second position within the main valve chamber 111. When the main valve core 2 is in the first position, the main valve core 2 opens the first passage between the oil inlet 1111 and the first working oil port, and opens the second passage between the second working oil port and the oil outlet 1112. In the directional control valve, the hydraulic oil flows into the main valve chamber 111 from the oil inlet 1111 and flows out from the first working oil port through the first passage. After flowing through other components of the hydraulic system, the hydraulic oil flows back to the directional control valve from the second working oil port and flows out from the oil outlet 1112 through the second passage.
[0050] When the main valve core 2 is in the second position, it opens the third passage between the inlet port 1111 and the second working port, and the fourth passage between the first working port and the outlet port 1112. In the directional valve, hydraulic oil flows from the inlet port 1111 into the main valve chamber 111, exits through the third passage from the second working port, and after flowing through other components of the hydraulic system, returns from the first working port to the directional valve, and exits through the fourth passage from the outlet port 1112. This four-passage oil circuit design balances the hydraulic pressure on both sides of the main valve core 2, reducing the operating force required to drive the main valve core 2 and lowering system energy consumption.
[0051] In one embodiment of this disclosure, when the main valve core 2 moves to the first position, the first position detection mechanism 51 detects the position of the first transition valve core 31. Specifically, when the main valve core 2 moves to the first position, the first position detection mechanism 51 can detect that the first transition valve core 31 has moved to a preset sensing position. At this time, the first position detection mechanism 51 can send a detection signal, for example, by illuminating an indicator light to provide real-time feedback of the detection signal. This allows the operator to know that the main valve core 2 has accurately moved into position, that is, the first passage between the oil inlet 1111 and the first working oil port, and the second passage between the second working oil port and the oil outlet 1112 are fully connected, and other components outside the directional valve can work normally. Thus, the position of the main valve core 2 can be known by detecting the position of the first transition valve core 31. The main valve core 2 does not need a built-in detection module, reducing processing costs and failure rates.
[0052] In one embodiment of this disclosure, when the main valve core 2 moves to the second position, the second position detection mechanism 52 detects the position of the second transition valve core 32. Specifically, when the main valve core 2 moves to the second position, the second position detection mechanism 52 can detect that the second transition valve core 32 has moved to a preset sensing position. At this time, the second position detection mechanism 52 can send a detection signal, for example, by illuminating an indicator light to provide real-time feedback. This allows the operator to know that the main valve core 2 has accurately moved into position, that is, the third passage between the oil inlet 1111 and the second working oil port, and the fourth passage between the first working oil port and the oil outlet 1112 are fully connected, and other components outside the directional valve can work normally. Thus, the position of the main valve core 2 can be known by detecting the position of the second transition valve core 32. The main valve core 2 does not need a built-in detection module, reducing processing costs and failure rates.
[0053] In one embodiment of this disclosure, a third position is provided between the first and second positions. When the main valve core 2 moves to the third position, the first, second, third, and fourth passages are all disconnected. Thus, when the main valve core 2 moves to the third position, all passages in the directional valve are disconnected, forming a hydraulic lock-up state. This immediately stops the movement of the actuator in the hydraulic system, preventing malfunctions of the actuator due to unexpected signals or valve core jamming, thereby improving equipment safety.
[0054] In one embodiment of this disclosure, the reversing valve with position detection further includes an elastic component 6, which is disposed in the detection valve chamber 121. A first elastic component 61 is disposed in the first detection valve chamber 1211, and a second elastic component 62 is disposed in the second detection valve chamber 1212. The first elastic component 61 cooperates with the first transition valve core 31, providing a preload force to the first transition valve core 31 to move in the direction of the third position. The second elastic component 62 cooperates with the second transition valve core 32, providing a preload force to the second transition valve core 32 to move in the direction of the third position. When both the first drive mechanism 41 and the second drive mechanism 42 are stopped, the main valve core 2 is configured to remain in the third position under the action of the first elastic component 61 and the second elastic component 62. In this way, when both the first drive mechanism 41 and the second drive mechanism 42 are de-energized or fail, the preload of the first elastic component 61 and the second elastic component 62 forces the main valve core 2 back to the third position, so that the oil circuit inside the directional valve can be automatically restored to the fully cut-off state, thus avoiding the system from going out of control due to valve core jamming or signal loss.
[0055] In a specific embodiment of this disclosure, the first elastic component 61 and the second elastic component 62 can be return springs, and the first drive mechanism 41 and the second drive mechanism 42 can be electromagnets. The first drive mechanism 41 and the second drive mechanism 42 are respectively connected to an external control circuit via the first drive terminal 1231 and the second drive terminal 1232 to respectively realize the power supply and signal control of the two electromagnets. When the electromagnet is not energized, the main valve core 2 remains in its initial position (i.e., the third position) under the elastic force of the return spring, and the position detection mechanism 5 does not issue a detection signal. When one of the electromagnets is energized, the electromagnet can drive the transition valve core 3 to move, and the transition valve core 3 drives the main valve core 2 to move from the third position to the desired working position (i.e., the first position or the second position), thereby realizing the hydraulic oil reversal process.
[0056] like Figure 2 and Figure 3 As shown, in one embodiment of this disclosure, the first transition valve core 31 and the second transition valve core 32 have grooves at their ends near the main valve core 2. Specifically, the first transition valve core 31 has a first groove 312 at its end near the main valve core 2, and the second transition valve core 32 has a second groove 322 at its end near the main valve core 2. The ends of the main valve core 2 that connect to the first transition valve core 31 and the second transition valve core 32 are provided with protrusions that match the grooves. The two protrusions can be respectively embedded in the first groove 312 and the second groove 322. In this way, through the cooperation of the protrusions and grooves, there is no relative sliding gap between the main valve core 2 and the first transition valve core 31 and the second transition valve core 32, avoiding reversing delay or position deviation caused by gaps.
[0057] This non-fixed design between the transition valve core 3 and the main valve core 2 eliminates the need to disassemble the entire valve core assembly when only the transition valve core 3 is damaged. Only the damaged portion needs to be removed and replaced, reducing maintenance workload. Furthermore, maintenance does not require complete disassembly of the valve body 1; only the transition valve core 3 needs partial disassembly, improving maintenance efficiency and reducing equipment downtime. In addition, since the main valve core 2 is typically complex and expensive, this design avoids replacing the entire valve core assembly due to partial damage, reducing spare parts costs.
[0058] like Figures 1 to 3 As shown, in one embodiment of this disclosure, the first position detection mechanism 51 and the second position detection mechanism 52 are respectively a first proximity switch and a second proximity switch. The outer circumferences of the first transition valve core 31 and the second transition valve core 32 are provided with annular protrusions corresponding to the sensing areas of the first and second proximity switches, respectively. Specifically, the annular protrusion on the outer circumference of the first transition valve core 31 is designated as the first protrusion 311, and the annular protrusion on the outer circumference of the second transition valve core 32 is designated as the second protrusion 321. When the main valve core 2 moves to the first position, the first protrusion 311 of the first transition valve core 31 enters the sensing area of the first proximity switch; when the main valve core 2 moves to the second position, the second protrusion 321 of the second transition valve core 32 enters the sensing area of the second proximity switch, thereby triggering the proximity switch to output a detection signal. In this way, this disclosure can achieve the detection function through a position detection mechanism 5 that does not require mechanical contact, such as a proximity switch, saving space inside the valve body 1 and avoiding wear and malfunctions caused by mechanical contact, thus extending the service life of the directional valve.
[0059] In a specific embodiment of this disclosure, the proximity switch can be a high-pressure resistant inductive proximity switch. This type of switch can be selected as normally closed or normally open, enabling direct detection and a fast response. The high-pressure resistant inductive proximity switch has protection functions such as polarity protection, overload protection, and short-circuit transient protection, ensuring the safety of the entire system. When the transition valve core 3 moves to the preset position, the high-pressure resistant inductive proximity switch detects the position signal in real time and transmits it to the control system. The control system uses this signal to logically determine the state of the hydraulic circuit. After confirming there is no fault, it ensures that the hydraulic system actuators safely and reliably enter the next working stage.
[0060] In one embodiment of this disclosure, the valve body 1 includes a main valve body 11 and a transition block 12. The transition block 12 includes a first transition block 1201 and a second transition block 1202 located on opposite sides of the main valve body 11. The main valve chamber 111 is disposed within the main valve body 11, and the first detection valve chamber 1211 and the second detection valve chamber 1212 are respectively disposed within the first transition block 1201 and the second transition block 1202. The main valve body 11 is detachably connected to the first transition block 1201 and the second transition block 1202 via screws 7. The detachable design of the main valve body 11 and the transition block 12, along with the combined effect of the groove of the transition valve core 3 and the protrusion of the main valve core 2, allows for the replacement of only the damaged component when the transition block 12 or other components thereon are damaged, without needing to replace the entire valve body 1. This design not only reduces spare parts costs but also shortens maintenance time and improves equipment availability.
[0061] The directional valve with position detection disclosed herein achieves a more streamlined overall structure and smaller footprint through optimized component layout and integrated design, making it suitable for applications with limited installation space. Furthermore, the optimized flow channel design effectively reduces fluid resistance and improves media flow efficiency, making it suitable for various flow conditions. The modular design simplifies the assembly process, and key components are easy to disassemble and assemble, reducing maintenance costs and operational complexity.
[0062] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.
Claims
1. A position detecting reversing valve characterized by comprising: include: The valve body is provided with a main valve chamber and a detection valve chamber that are interconnected. The valve body is also provided with a detection channel that is connected to the detection valve chamber. A main valve core, which extends along a first axis and is configured to be movably disposed within the main valve chamber; A transition valve core is movably disposed within the detection valve cavity and is configured to engage with the main valve core in a driving manner. A drive mechanism configured to drive the transition valve core to move relative to the detection valve chamber, such that the transition valve core drives the main valve core to move relative to the main valve chamber along the first axis. A position detection mechanism is mounted on the valve body, and the detection end of the position detection mechanism is configured to extend into the detection channel to detect the displacement of the transition valve core.
2. The rotary valve with a belt position detection according to claim 1, characterized in that The detection valve chamber is provided in two parts, which are respectively referred to as the first detection valve chamber and the second detection valve chamber located on opposite sides of the main valve core; The transition valve core is constructed to have two parts, which are respectively referred to as the first transition valve core that is movably engaged with the first detection valve cavity and the second transition valve core that is movably engaged with the second detection valve cavity; The drive mechanism is configured to have two parts, which are respectively referred to as the first drive mechanism that cooperates with the first transition valve core and the second drive mechanism that movably cooperates with the second transition valve core. The position detection mechanism is configured to have two parts, referred to as the first position detection mechanism and the second position detection mechanism, respectively. The first position detection mechanism is configured to detect the position of the first transition valve core, and the second position detection mechanism is configured to detect the position of the second transition valve core.
3. The rotary valve with band position detection according to claim 2, characterized in that The valve body is provided with an oil inlet, an oil return port, a first working oil port, and a second working oil port; the main valve core is configured to move between a first position and a second position. When in the first position, the main valve core is configured to open a first passage between the oil inlet and the first working oil port, and to open a second passage between the second working oil port and the oil outlet. When in the second position, the main valve core is configured to open a third passage between the oil inlet and the second working oil port, and to open a fourth passage between the first working oil port and the oil outlet.
4. The position-detecting rotary valve according to claim 3, wherein When the main valve core moves to the first position, the first position detection mechanism is configured to detect the position of the first transition valve core.
5. The rotary valve with a belt position detection according to claim 3, characterized in that When the main valve core moves to the second position, the second position detection mechanism is configured to detect the position of the second transition valve core.
6. The rotary valve with a belt position detection according to claim 3, characterized in that There is a third position between the first and second positions. When the main valve core moves to the third position, the first, second, third, and fourth passages are all disconnected.
7. The position-sensor-equipped directional valve according to claim 6, characterized by A first elastic component is provided in the first detection valve cavity, and a second elastic component is provided in the second detection valve cavity; the first elastic component cooperates with the first transition valve core, and provides a preload force for the first transition valve core to move in the direction of the third position; the second elastic component cooperates with the second transition valve core, and provides a preload force for the second transition valve core to move in the direction of the third position. When the first drive mechanism and the second drive mechanism stop working, the main valve core is configured to remain in the third position under the action of the first elastic component and the second elastic component.
8. The position-sensor-equipped directional valve according to claim 3, characterized by The first transition valve core and the second transition valve core have grooves at one end near the main valve core, and the end of the main valve core connected to the first transition valve core and the second transition valve core has protrusions that match the grooves.
9. The position-sensor-equipped directional valve according to claim 3, characterized by The first position detection mechanism and the second position detection mechanism are respectively a first proximity switch and a second proximity switch. The outer circumference of the first transition valve core and the second transition valve core are provided with annular bosses corresponding to the sensing areas of the first proximity switch and the second proximity switch, respectively. When the main valve core moves to the first position, the annular boss of the first transition valve core enters the sensing area of the first proximity switch; when the main valve core moves to the second position, the annular boss of the second transition valve core enters the sensing area of the second proximity switch to trigger the proximity switch to output a detection signal.
10. The position-sensor-equipped directional valve according to claim 3, characterized by The valve body includes a main valve body and a first transition block and a second transition block located on opposite sides of the main valve body; wherein, the main valve cavity is disposed within the main valve body, the first detection valve cavity and the second detection valve cavity are respectively disposed within the first transition block and the second transition block, and the main valve body is detachably connected to the first transition block and the second transition block respectively.