Pilot module and multi-way valve

Abstract

The present invention relates to the field of hydraulic control technology, and specifically to a pilot module and a multi-way valve. The pilot module of the present invention comprises an adjusting component, a detecting component, a limiter and a control component. The adjusting component is suitable for being connected to the oil circuits at both ends of a main valve core to adjust the oil pressure at both ends of the main valve core. The detecting component contacts the main valve core to detect the displacement of the main valve core. One end of the limiter is connected to the detecting component to limit the position of the detecting component. One end of the control component is respectively connected to the adjusting component and the detecting component to control the adjusting component to adjust the oil pressure at both ends of the main valve core according to the detection data of the detecting component, and the other end of the control component is suitable for being connected to a bus. The pilot module proposed by the present invention can improve the control accuracy of the pilot module over the multi-way valve.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic control, and in particular to a pilot module and a multi-way valve. Background Art

[0002] With the development of digitalization and intelligence, the hydraulic components in the main equipment of coal mining machines, construction machinery, and agricultural machinery are facing digital improvements, especially the load-sensitive multi-way valves, which are the core control components of excavators, cranes, coal mining machines, and roadheaders. The control of multi-way valves in related technologies mostly adopts open-loop control, resulting in low control accuracy and slow response speed. It is impossible to perform high-precision position control and it is difficult to meet development needs. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a pilot module, which can improve the control accuracy of the pilot module on the multi-way valve.

[0004] The embodiment of the present invention further provides a multi-way valve.

[0005] The pilot module of the embodiment of the present invention includes: an adjusting component, which is suitable for being connected to the oil circuits at both ends of the main valve core to adjust the oil pressure at both ends of the main valve core; a detection component, which is in contact with the main valve core to detect the displacement of the main valve core; a limit member, one end of which is connected to the detection component to limit the position of the detection component; a control member, one end of which is respectively connected to the adjusting component and the detection component to control the adjusting component to adjust the oil pressure at both ends of the main valve core according to the detection data of the detection component, and the other end of the control member is suitable for being connected to a bus.

[0006] The pilot module of the embodiment of the present invention can improve the control accuracy of the pilot module on the multi-way valve.

[0007] In some embodiments, the regulating assembly includes a first regulating member and a second regulating member, the first regulating member is connected to an oil circuit at one end of the main valve core, and the second regulating member is connected to an oil circuit at the other end of the main valve core.

[0008] In some embodiments, the detection assembly includes a detection member and a moving member, one end of the detection member is connected to one end of the moving member, the other end of the detection member is connected to the control member, and the other end of the moving member contacts one end of the main valve core.

[0009] In some embodiments, the moving member includes a moving body and a reset member, one end of the moving body is connected to the reset member, and the other end of the moving body is in contact with the main valve core.

[0010] In some embodiments, the pilot module further includes a first shell, the control component is disposed in the first shell, and the adjustment component and the detection component are partially located in the first shell.

[0011] In some embodiments, the pilot module further includes a second shell, a connector and a connection assembly, the second shell and the first shell have a planar joint surface, the connector is disposed on the second shell, and the connection assembly is partially located inside the second shell.

[0012] In some embodiments, the connection assembly includes a first connection member and a second connection member, the first connection member is adapted to the second connection member, a port is reserved on the first connection member, and the second connection member is connected to the control member.

[0013] In some embodiments, the connection assembly further includes a connection plate, and the connection plate is respectively connected to the second connection member and the control member.

[0014] In some embodiments, the pilot module further includes a seal, wherein the seal is disposed between the first shell and the second shell, and the seal is disposed on a side of the second shell close to the first shell.

[0015] The multi-way valve according to the embodiment of the present invention comprises: a pilot module, which is any one of the pilot modules described above; and a main valve core, which is connected to the pilot module.

[0016] The multi-way valve in the embodiment of the present invention can improve the control accuracy of the multi-way valve by the pilot module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a pilot module according to an embodiment of the present invention.

[0018] Figure 2 It is a partial cross-sectional view of a connection assembly of a pilot module according to an embodiment of the present invention.

[0019] Figure 3 It is a partial cross-sectional view of the detection component of the pilot module according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] Adjustment assembly 1, first adjustment member 11, second adjustment member 12,

[0022] Detection component 2, detection member 21, moving member 22, moving body 221, reset member 222, fixing member 23, control member 3, first shell 4, first through hole 41, second shell 5, second through hole 51, connecting member 6, connecting component 7, first connecting member 71, second connecting member 72, connecting plate 73, sealing member 8, and limiting member 9. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] like Figure 1-3 As shown, the pilot module of the embodiment of the present invention includes an adjustment component 1, a detection component 2, a limiter 9 and a control component 3.

[0025] In some embodiments, the regulating component 1 is suitable for being connected to the oil circuits at both ends of the main valve core (not shown in the figure) to adjust the oil pressure at both ends of the main valve core. The detection component 2 contacts the main valve core to detect the displacement of the main valve core. One end of the limiter 9 is connected to the detection component 2 to limit the position of the detection component 2. One end of the control component 3 is respectively connected to the regulating component 1 and the detection component 2 to control the regulating component 1 to adjust the oil pressure at both ends of the main valve core according to the detection data of the detection component 2, and the other end of the control component 3 is suitable for being connected to the bus (not shown in the figure).

[0026] Specifically, the regulating component 1 is connected to the control component 3 to transmit the pressure regulating data of the regulating component 1 to the control component 3, and the detection component 2 is connected to the control component 3 to transmit the actual displacement data of the main valve core to the control component 3. The control component 3 compares the preset displacement data transmitted by the bus with the actual displacement data of the main valve core detected by the detection component 2, and adjusts the pressure regulating parameters of the regulating component 1 according to the comparison result to achieve precise control of the position of the main valve core.

[0027] Optionally, since the detection component 2 detects the displacement of the main valve core, higher requirements are placed on the installation position of the detection component 2. In the embodiment of the present invention, the position of the detection component 2 is fixed by setting a limit member 9 to improve the detection accuracy of the detection component 2 on the displacement of the main valve core.

[0028] The embodiment of the present invention adjusts the pressure parameters at both ends of the main valve core through the adjustment component 1 to cause the main valve core to move, and detects the actual displacement of the main valve core through the detection component 2. The control component 3 adjusts the pressure regulation parameters of the adjustment component 1 based on the comparison between the actual displacement of the main valve core and the preset displacement to achieve closed-loop control of the main valve core position adjustment. Compared with the open-loop control of the multi-way valve in the related technology, the closed-loop control of the embodiment of the present invention can achieve high-precision position control of the main valve core, improve the response speed, and adapt to the development of host equipment.

[0029] For example, the control component 3 can be set as a PCB board. It can be understood that in addition to the closed-loop control of the valve core position, the control component 3 can also be set with a current control closed loop, and can also realize the function of temperature detection feedback. This embodiment does not limit the functions of other components on the control component 3, which shall be subject to the specific implementation.

[0030] In some embodiments, the regulating assembly 1 includes a first regulating member 11 and a second regulating member 12 , wherein the first regulating member 11 is connected to an oil circuit at one end of the main valve core, and the second regulating member 12 is connected to an oil circuit at the other end of the main valve core.

[0031] Specifically, the first adjusting member 11 is connected to the oil circuit at one end of the main valve core to adjust the oil circuit pressure at one end of the main valve core, and the second adjusting member 12 is connected to the oil circuit at the other end of the main valve core to adjust the oil circuit pressure at the other end of the main valve core. The oil circuit pressures at both ends of the main valve core are adjusted respectively by the first adjusting member 11 and the second adjusting member 12 to cause the main valve core to shift toward one end.

[0032] For example, the first adjusting member 11 and the second adjusting member 12 can both be configured as proportional pressure reducing valves. The two proportional pressure reducing valves can respectively control the two-way pilot pressures, control the pressures at both ends of the valve core of the multi-way valve, and adjust the position of the main valve core by oil pressure. The use of proportional pressure reducing valves can reduce the cost of the adjusting component 1 while achieving the adjustment of the main valve core position, thereby reducing the production cost of the pilot module.

[0033] In some embodiments, the detection component 2 includes a detection member 21 and a moving member 22, one end of the detection member 21 is connected to one end of the moving member 22, the other end of the detection member 21 is connected to the control member 3, and the other end of the moving member 22 contacts one end of the main valve core.

[0034] Specifically, the left end of the detection member 21 is connected to the control member 3, the right end of the detection member 21 is connected to the left end of the moving member 22, and the right end of the moving member 22 contacts the main valve core. The displacement of the main valve core is detected through the contact between the moving member 22 and the main valve core.

[0035] It can be understood that the detection member 21 is disposed on the left side of the moving member 22 , and the connection between the detection member 21 and the moving member 22 means that the detection member 21 can sense the displacement data of the moving member 22 .

[0036] Optionally, when the main valve core is displaced, the movable part 22 will move along with the main valve core, and the detection part 21 determines the displacement data of the main valve core by detecting the displacement data of the movable part 22, and then transmits the displacement data detected by the detection part 21 to the control part 3 through the connection between the detection part 21 and the control part 3, thereby realizing real-time and precise control of the position of the main valve core, thereby improving the control accuracy of the pilot module over the multi-way valve.

[0037] For example, the detection component 2 can be set as a Hall displacement sensor, and the detection part 21 is a PCB board. A Hall element is arranged on the PCB board. The Hall element is used to sense the displacement of the main valve core pushing the movable part 22. The displacement of the main valve core is detected in real time through the contact between the movable part 22 and the main valve core. In addition, the control logic is simpler, the detection sensitivity is high, the response speed is fast, and the economic cost is lower.

[0038] It is understandable that a Hall element is provided on the detection member 21, and the Hall element can sense the displacement of the moving member 22. Therefore, high requirements are placed on the installation position of the detection member 21. The position of the detection member 21 is fixed by the limit member 9 to improve the accuracy of the detection member 21 in sensing the displacement of the moving member 22.

[0039] In some embodiments, the moving member 22 includes a moving body 221 and a reset member 222 , one end of the moving body 221 is connected to the reset member 222 , and the other end of the moving body 221 is in contact with the main valve core.

[0040] Specifically, the left end of the movable body 221 is connected to the reset member 222, and the right end of the movable body 221 is in contact with the main valve core. The reset member 222 is connected to the movable body 221 to ensure that the movable body 221 is always in contact with the main valve core, so that the displacement data of the movable body 221 sensed by the detection member 21 remains the same as the actual displacement of the main valve core, so as to improve the detection accuracy of the detection component 2 on the displacement of the main valve core.

[0041] Optionally, when the main valve core moves toward the direction approaching the movable body 221, that is, the main valve core moves to the left, the movable body 221 is subjected to the pressure of the main valve core moving to the left and the supporting force of the reset member 222 to the right. Since the supporting force of the reset member 222 is much smaller than the pressure of the main valve core, the movable body 221 moves to the left under the action of the main valve core and the reset member 222. When the main valve core moves toward the direction away from the movable body 221, that is, the main valve core moves to the right, the movable body 221 is subjected to the reset action of the reset member 222 to the right, so that the movable body 221 and the main valve core are kept in contact, thereby ensuring the contact state between the movable body 221 and the main valve core.

[0042] For example, the movable body 221 can be configured as an extension rod to detect the displacement of the main valve core through telescopic movement, and the reset element 222 can be configured as a reset spring.

[0043] Optionally, a fixing member 23 is further provided at the left end of the return spring, and the fixing member 23 is used to limit the return spring.

[0044] In some embodiments, the pilot module further includes a first shell 4 , the control component 3 is disposed in the first shell 4 , and the adjustment component 1 and the detection component 2 are partially located in the first shell 4 .

[0045] Specifically, the first shell 4 is provided with a mounting hole for the adjustment component 1, a mounting hole for the detection component 2 and a mounting groove for the control component 3. The control component 3 is installed in the first shell 4 through the mounting groove, and the adjustment component 1 and the detection component 2 are partially located outside the first shell 4 through the mounting holes.

[0046] Optionally, an installation cavity is provided in the first shell 4, and first through holes 41 are reserved on both sides of the right top of the first shell 4. Screws pass through the first through holes 41 to connect the first shell 4 with the main valve core, so that the pilot module is connected to the main valve core, and the pilot module controls the displacement of the main valve core.

[0047] For example, the coil lead of the regulating component 1 is passed through the lead hole into the installation cavity of the control component 3 and is welded to the wiring hole on the control component 3 to achieve the connection between the regulating component 1 and the control component 3.

[0048] For example, the outlet wire of the detection component 21 is welded to the control component 3 through the outlet hole to realize the connection between the detection component 21 and the control component 3, so that the detection component 21 can transmit the detected main valve core data to the control component 3 in real time.

[0049] Optionally, a mounting hole for the fixing member 23 is reserved in the first shell 4 to facilitate the installation of the fixing member 23. The fixing member 23 is fixed by interference fit into the mounting hole for the fixing member 23 in the first shell 4, thereby fixing the fixing member 23 and fixing the position of the reset spring.

[0050] In some embodiments, the pilot module also includes a second shell 5, a connector 6 and a connecting assembly 7. The second shell 5 and the first shell 4 have a planar joint surface. The connector 6 is disposed on the second shell 5, and the connecting assembly 7 is partially located inside the second shell 5.

[0051] Specifically, the second shell 5 has a wiring cavity, and a mounting hole for the connector 6 is reserved on the second shell 5. The connector 6 is installed at the mounting hole, and the cable is connected to the connecting component 7 in the wiring cavity through the connector 6, which facilitates the connection between the bus and the connecting component 7.

[0052] Optionally, the number of connectors 6 is set to two, and by introducing two cables, that is, there are two bus signals, inter-chip communication during bus communication can be achieved. Through the CAN bus communication method, the cable usage is reduced while the communication speed is improved.

[0053] Optionally, by providing an explosion-proof structure with a planar joint surface between the second shell 5 and the first shell 4, the explosion-proof strength is high and the explosion-proof performance is good.

[0054] For example, the cables are explosion-proof cables.

[0055] Optionally, a second through hole 51 is reserved on the second shell 5 to facilitate screws to pass through the second through hole 51 to connect with the first shell 4 , thereby improving the connection tightness between the first shell 4 and the second shell 5 .

[0056] In some embodiments, the connection component 7 includes a first connection member 71 and a second connection member 72 , the first connection member 71 is adapted to the second connection member 72 , a port is reserved on the first connection member 71 , and the second connection member 72 is connected to the control member 3 .

[0057] Specifically, the reserved port on the first connector 71 is connected and fixed with the cable introduced into the connector 6, which facilitates the wiring of the first connector 71. The connected first connector 71 is connected to the second connector 72, thereby improving the convenience of wiring.

[0058] Optionally, by configuring the first connector 71 and the second connector 72 to be compatible with each other, the connection between the first connector 71 and the second connector 72 is facilitated, thereby improving wiring efficiency.

[0059] For example, the first connecting member 71 is a plug, and the second connecting member 72 is a socket. The plug can be a plug-in connector, and a quick connection can be achieved with the socket through the plug-in connector, thereby improving the convenience of wiring.

[0060] In some embodiments, the connection assembly 7 further includes a connection plate 73, and the connection plate 73 is connected to the second connection member 72 and the control member 3 respectively.

[0061] Specifically, the connecting plate 73 is arranged in the first shell 4, the left end of the connecting plate 73 is connected to the second connecting member 72, and the right end of the connecting plate 73 is connected to the control member 3. The data in communication is transmitted to the control member 3 through the connecting plate 73 in a timely manner via a cable, thereby improving communication efficiency.

[0062] For example, the second connecting member 72 and the connecting plate 73 may be connected by welding, and the connecting plate 73 and the control member 3 may be connected by a wire.

[0063] In the embodiment of the present invention, the second connecting member 72 is connected to the connecting plate 73, and the connecting plate 73 is further connected to the control member 3. Compared with the method in the related art that the second connecting member 72 is directly connected to the control member 3, the embodiment of the present invention reduces the space occupied by the second connecting member 72 on the control member 3 through the setting of the connecting plate 73. At the same time, since the setting of the connecting plate 73 provides sufficient space for the second connecting member 72, it is convenient to connect the second connecting member 72 with the connecting plate 73, and can also improve the sealing effect of the control member 3, thereby improving the explosion-proof performance of the pilot module.

[0064] In some embodiments, the pilot module further includes a seal 8 , which is disposed between the first shell 4 and the second shell 5 , and the seal 8 is disposed on a side of the second shell 5 close to the first shell 4 .

[0065] Specifically, a sealing groove is provided on the right side of the second shell 5 , and a sealing member 8 is installed in the sealing groove to improve the sealing performance between the first shell 4 and the second shell 5 .

[0066] In the embodiment of the present invention, the adjustment component 1 and the detection component 2 are installed on the first shell 4 and connected to the control component 3 in the first shell 4. After the control component 3 is connected to the second connecting component 72 through the connecting plate 73, that is, after the second connecting component 72 is welded to the connecting plate 73, the installation cavity can be sealed with epoxy resin glue until the sealing glue submerges the connecting plate 73, and then the cable is introduced into the second shell 5 through the connecting component 6 and connected to the first connecting component 71. After the sealing component 8 is installed in the sealing groove in the second shell 5 through the connection between the first connecting component 71 and the second connecting component 72, the second shell 5 is connected to the first shell 4 to complete the assembly of the pilot module.

[0067] Optionally, the pilot module can be used alone or in conjunction with various types of multi-way valves for pilot control, which has a wider range of applications.

[0068] An embodiment of the present invention may further include an adapter, one end of which is connected to the pilot module, and the other end of which is connected to the main valve core. By setting the adapter, the pilot module can be connected to multi-way valves of different types, so that the pilot module can perform closed-loop control on various types of multi-way valves, thereby improving the adaptability of the pilot module.

[0069] The multi-way valve according to the embodiment of the present invention includes a pilot module and a main valve core.

[0070] In some embodiments, the pilot module is any of the pilot modules described above. The main valve core is connected to the pilot module.

[0071] Specifically, the connection between the main valve core and the pilot module facilitates the pilot module to accurately control the position of the main valve core.

[0072] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0074] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] It is to be understood that the above embodiments are exemplary and are not to be construed as limiting the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A pilot module, characterized in that: include: A regulating component, wherein the regulating component is adapted to be connected to the oil circuits at both ends of the main valve core to regulate the oil pressure at both ends of the main valve core; A detection component, the detection component contacts the main valve core to detect the displacement of the main valve core; A limiting member, one end of which is connected to the detection component to limit the position of the detection component; A control member, one end of which is connected to the regulating assembly and the detection assembly respectively so as to control the regulating assembly to regulate the oil pressure at both ends of the main valve core according to the detection data of the detection assembly, and the other end of the control member is suitable for being connected to a bus; It also includes a second housing, a connector and a connection assembly, wherein the connection assembly includes a first connector and a second connector, the first connector is adapted to the second connector, a port is reserved on the first connector, the second connector is connected to the control member, the first connector is a plug, and the second connector is a socket; The connection assembly further comprises a connection plate, and the connection plate is connected to the second connection member and the control member respectively; The regulating assembly comprises a first regulating member and a second regulating member, wherein the first regulating member and the second regulating member are both proportional pressure reducing valves; It also includes a first shell, the control component is arranged in the first shell, and the adjustment component and the detection component are partially located in the first shell; A plane joint surface is formed between the second shell and the first shell, the connecting member is arranged on the second shell, and the number of the connecting members is two, and the connecting component is partially located in the second shell; The invention also includes a sealing member, which is arranged between the first shell and the second shell, and the sealing member is arranged on a side of the second shell close to the first shell.

2. The pilot module according to claim 1, characterized in that: The first regulating member is in communication with an oil passage at one end of the main valve core, and the second regulating member is in communication with an oil passage at the other end of the main valve core.

3. The pilot module according to claim 1, characterized in that: The detection component includes a detection member and a moving member, one end of the detection member is connected to one end of the moving member, the other end of the detection member is connected to the control member, and the other end of the moving member contacts one end of the main valve core.

4. The pilot module according to claim 3, characterized in that: The moving member comprises a moving body and a resetting member, one end of the moving body is connected to the resetting member, and the other end of the moving body is in contact with the main valve core.

5. A multi-way valve, characterized in that: include: A pilot module, wherein the pilot module is the pilot module according to any one of claims 1 to 4 above; A main valve core is connected to the pilot module.

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