Pressure reducing commutating valve

Abstract

The application discloses a pressure drop-reducing reversing valve, which comprises a valve body, a flow control member, at least one reset member and at least one driving member, the valve body is provided with a valve cavity, at least two liquid inlet ports, at least two liquid outlet ports and at least one first through port, the valve cavity of the valve body defines at least two partition walls, and the valve body is further provided with an exhaust channel and an exhaust port. The application can realize large-flow discharging by adopting the mode of multi-port oil inlet and multi-port oil outlet under the condition that the oil inlet flow is constant, so as to meet the use requirement of large-flow discharging. When the hydraulic pressure value in the valve cavity is higher than a predetermined hydraulic pressure value and the hydraulic oil seeps into the space where the local parts are located, the application can reduce the pressure by draining the hydraulic oil in the space where the local parts are located, eliminate the impact of the hydraulic oil on the local parts, prolong the service life, increase the sensitivity of reversing, and ensure that the pressure drop-reducing reversing valve can be normally used.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more particularly to a directional control valve with reduced pressure drop. Background Technology

[0002] Directional control valves are devices used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. There are many types of directional control valves, and different solenoid valves play different roles in different positions of the control system.

[0003] For example, in the pre-plasticizing process of an injection molding machine, a hydraulic power source supplies hydraulic oil to a hydraulic motor via a reversing valve. The hydraulic motor converts the hydraulic pressure into mechanical energy on its output shaft, driving the screw connected to the output shaft to rotate. The speed of the hydraulic motor varies with the flow rate, and the screw speed is a crucial parameter affecting factors such as the conveying speed of the injection molding material in the screw, plasticizing capacity, plasticizing quality, and molding cycle. If the pre-plasticizing flow rate is low, the required pre-plasticizing time will be prolonged, and the uniformity of the melt temperature will also be poor, ultimately leading to a longer molding cycle and poor molding quality.

[0004] Existing directional control valves primarily utilize short-stroke electromagnets, which, combined with the valve core, result in a relatively small flow cross-sectional area. To simplify the fluid flow path and because multi-channel designs can lead to fluid pressure interference within the valve body, these valves are typically designed with only a single inlet. The movement of the valve core controls the discharge of hydraulic oil from a single outlet at a different location. Clearly, this type of directional control valve has a small output flow rate and cannot meet the needs of high-flow applications. Summary of the Invention

[0005] One advantage of this invention is that it provides a reversing valve with reduced pressure drop. This invention can achieve large flow discharge by using multiple inlet and outlet ports while maintaining a constant inlet flow rate, thus meeting the application requirements for large flow discharge.

[0006] One advantage of this invention is that it provides a directional control valve with reduced pressure drop. When the hydraulic pressure in the valve chamber is higher than a predetermined hydraulic pressure value, causing hydraulic oil to seep into the space where local components are located, the invention can reduce the pressure by draining the hydraulic oil in the space where local components are located, thereby eliminating the impact of hydraulic oil on local components, extending service life, and increasing the sensitivity of directional control. This ensures that the directional control valve with reduced pressure drop can be used normally.

[0007] To achieve at least one of the above advantages of the present invention, the present invention provides a directional control valve with reduced pressure drop, installed between a hydraulic motor and a hydraulic source, the directional control valve with reduced pressure drop comprising:

[0008] A valve body has a first end and a second end opposite to the first end, wherein the valve body forms a valve cavity between the first end and the second end, and the valve body forms at least two inlets communicating with the hydraulic source and at least two outlets communicating with the oil motor, the inlets, the outlets and the first port are all communicating with the valve cavity, the outlets are spaced apart from the inlets, and at least two partition walls are defined on the inner wall of the valve cavity on the valve body, the partition walls being located between the inlets and the outlets;

[0009] A flow control element is disposed in the valve cavity and is reciprocally movable between a first end and a second end. The flow control element has at least two flow control walls, and each of the partition walls is in sealing contact with one of the flow control walls to block the inlet and the outlet in the valve cavity, thereby preventing fluid from flowing from the inlet to the outlet. After the flow control element moves a predetermined distance, the partition wall is offset from the corresponding flow control wall so that the inlet is connected to the outlet via the valve cavity, allowing fluid to enter from the inlet, flow through the valve cavity, and exit through the outlet.

[0010] According to one embodiment of the present invention, the valve body further has at least one diversion port, which is connected to the liquid outlet.

[0011] According to one embodiment of the present invention, the two liquid outlets are disposed between the two liquid inlets.

[0012] According to an embodiment of the present invention, the pressure drop-reducible reversing valve further includes at least one reset member, the flow control member having a first free end corresponding to the first end and a second free end corresponding to the second end, the reset member being located between the first end and the first free end and / or between the second end and the second free end, the reset member being disposed in the valve cavity such that it can undergo elastic deformation when the flow control member is driven to move between the first end and the second end, so that the flow control member is moved in a direction tending to reset.

[0013] According to one embodiment of the present invention, there are two reset devices, one located between the first end and the first free end and the other located between the second end and the second free end.

[0014] According to one embodiment of the present invention, the valve body further forms a first port at the first end, the first port being connected to the valve cavity and oriented toward the moving direction of the flow control element. The pressure drop-reducible reversing valve further includes at least one driving member, the driving member being mounted on the valve body and opposite to the first port, and the flow control member sealingly blocking the first port. The driving member is configured to drive the flow control element to move within the valve cavity between the first end and the second end to connect the inlet to the adjacent outlet.

[0015] According to an embodiment of the present invention, the flow control member forms a guide wall radially on the outer wall between the first free end and the second free end of the flow control member and each of the adjacent flow control walls. The guide wall, the valve body, the guide wall, and the driving member form a first mounting space at the first end of the valve body to accommodate one reset member. The guide wall and the valve body form a second mounting space of the same volume and symmetrical to the first mounting space at the second end of the valve body for mounting another reset member.

[0016] According to one embodiment of the present invention, the valve body further has at least one external discharge channel and an external discharge port communicating with the external discharge channel, and the first installation space and the second installation space are respectively individually connected to an external oil tank through one of the external discharge channels and an external discharge port communicating with the external discharge channel.

[0017] According to one embodiment of the present invention, the valve body further has at least one external discharge channel and an external discharge port communicating with the external discharge channel, the external discharge port communicating with an external oil tank, and the external discharge channel communicating with the first installation space and the second installation space.

[0018] According to one embodiment of the present invention, the pressure drop-reducible directional valve further includes at least one seal, which is installed between the drive member and the valve body. Attached Figure Description

[0019] Figure 1 A partial three-dimensional view of the reversing valve with reduced pressure drop described in this invention is shown.

[0020] Figure 2 A perspective view of a partial structure of the directional valve with reduced pressure drop described in this invention is shown.

[0021] Figure 3 A cross-sectional view of the structure of the directional valve with reduced pressure drop as described in this invention is shown before it moves.

[0022] Figure 4 A cross-sectional view of the reversing valve after movement, which has a reduced pressure drop according to the present invention, is shown. Detailed Implementation

[0023] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0024] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0025] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0026] refer to Figures 1 to 4 A pressure-reducing directional valve according to a preferred embodiment of the present invention will be described in detail below. The pressure-reducing directional valve is installed between a hydraulic motor and a hydraulic source. The pressure-reducing directional valve is used to deliver hydraulic oil to the hydraulic motor or to block the flow of hydraulic oil to the hydraulic motor.

[0027] The pressure drop reduction directional valve includes a valve body 10, the valve body 10 having a first end 1001 and a second end 1002 opposite to the first end 1001, wherein the valve body 10 forms a valve cavity 101 between the first end 1001 and the second end 1002, and furthermore, the valve body 10 also forms at least two liquid inlets 102 and at least two liquid outlets 103, the liquid inlets 102 and the liquid outlets 103 being in communication with the valve cavity 101.

[0028] Those skilled in the art will understand that the inlet 102 is connected to the hydraulic source for introducing hydraulic oil into the valve chamber 101. The outlet 103 is connected to the hydraulic motor, and the outlet 103 is configured to guide the hydraulic oil in the valve chamber 101 to the hydraulic motor. The outlet 103 and the inlet 102 are spaced apart on the valve body 10.

[0029] refer to Figures 3 to 4 The pressure drop reduction reversing valve further includes a flow control element 20, which is reciprocally movable between the first end 1001 and the second end 1002 in the valve chamber 101. The flow control element 20 has at least two flow control walls 21. The inner wall of the valve body 10 forming the valve cavity 101 forms at least two partition walls 11. Each partition wall 11 is disposed between an outlet 103 and an inlet 102, and each partition wall 11 is in sealing contact with a flow control wall 21 to block the inlet 102 and the outlet 103 in the valve cavity 101, thereby preventing fluid from flowing from the inlet 102 to the outlet 103. After the flow control element 20 moves a predetermined distance, the partition wall 11 is offset from the corresponding flow control wall 21, so that the inlet 102 is connected to the outlet 103 via the valve cavity 101, allowing fluid to enter from the inlet 102, flow out through the outlet 103 via the valve cavity 101.

[0030] Those skilled in the art will understand that, since the flow control element 20 can reciprocate in the valve cavity 101, the flow control wall 21 and the partition wall 11 are correspondingly sealed or staggered, so that at least two of the liquid inlets 102 can be isolated or connected to the adjacent liquid outlets 103 respectively, and since the valve body 10 is provided with multiple liquid inlets 102 and liquid outlets 103, in this way, under the condition of constant oil flow, a large flow rate can be achieved by using a multi-port oil inlet and multi-port oil outlet method.

[0031] Because the valve body 10 can handle large flow rates of liquid inlet and outlet, the liquid pressure drop can be reduced when the oil motor is working, thereby effectively ensuring the stable operation of the oil motor.

[0032] Preferably, two of each of the inlet 102, the outlet 103, the partition wall 11, and the flow control wall 21 are provided to ensure that the reversing valve with reduced pressure drop can supply hydraulic oil to the oil motor at a large flow rate while reducing the processing difficulty.

[0033] Preferably, the flow control wall 21 is implemented as a raised edge disposed around the periphery of the flow control element 20 and extending radially outward. When the raised edge abuts against the partition wall 11, the inlet 102 is separated from the outlet 103. The flow control element 20 is driven to move, and when the raised edge is misaligned with the partition wall 11, a gap is created between the raised edge and the partition wall 11, and the inlet 102 communicates with the outlet 103 through the gap between the raised edge and the partition wall 11 and the valve chamber 101.

[0034] Preferably, the size of the protruding edge is smaller than the size of the liquid outlet 103 and smaller than the size of the liquid inlet 102.

[0035] In a preferred embodiment, the two outlet ports 103 are disposed between the two inlets 102. When the flow control element 20 moves to offset the two protrusions from the corresponding partition walls 11 and create gaps, the inlets 102 communicate with the adjacent outlet ports 103 through the valve chamber 101. At this time, the hydraulic oil passing through the two inlets 102 can flow randomly to the two outlet ports 103 through the valve chamber 101.

[0036] Those skilled in the art will understand that, since the two outlets 103 are positioned between the two inlets 102, when the inlets 102 are connected to the outlets 103, the high-pressure fluid entering from the inlets 102 can exert opposing pressures on the flow control element 20 to balance the force exerted on the flow control element 20 by the high-pressure fluid, which tends to move between the first end 1001 and the second end 1002. This effectively ensures the stability of the flow control element 20.

[0037] As deformable, the two inlets 102 are disposed between the two outlets 103. When the flow control element 20 moves to offset the two protrusions from the two partition walls 11 and create gaps, the inlets 102 communicate with the adjacent outlets 103 through the valve chamber 101. At this time, the hydraulic oil passing through the two inlets 102 can flow through the valve chamber 101 to the two outlets 103 respectively.

[0038] As a deformable embodiment, the flow control wall 21 is implemented as a groove formed on the outer wall of the flow control element 20 and extending radially inward. When either the outlet 103 or the inlet 102 is opposite to the groove, and the other abuts against the outer wall adjacent to the groove of the flow control element 20, the inlet 102 is separated from the outlet 103. The size of the groove is larger than the size of the partition wall 11, and the flow control element 20 is configured to be movable to align the groove with the partition wall 11, at which point a portion of the groove corresponds to the inlet 102 and the outlet 103, and the inlet 102 communicates with the outlet 103 through the valve cavity 101 and the groove.

[0039] In a modified embodiment, the two outlet ports 103 are disposed between the two inlets 102. When the flow control element 20 moves such that the two grooves are respectively opposite to the two partition walls 11, and a portion of the grooves correspond to the adjacent inlets 102 and outlet ports 103, the inlets 102 communicate with the adjacent outlet ports 103 through the valve chamber 101 and the grooves. At this time, the hydraulic oil passing through the two inlets 102 can flow selectively to the two outlet ports 103 through the valve chamber 101.

[0040] To enable those skilled in the art to understand this embodiment, in at least one embodiment and corresponding figures below, the example is that the flow control wall 21 is implemented as a protruding edge disposed on the surface of the flow control element 20, and the protruding edge extends from the axis of the flow control element 20 toward the partition wall 11. Those skilled in the art should know that this is not a limitation of the present invention.

[0041] refer to Figures 3 to 4 When the two outlet ports 103 are positioned between the two inlet ports 102, the valve body 10 also has at least one diverter port 104, which communicates with the outlet ports 103. When the outlet port 103 communicates with the inlet ports 102, the hydraulic oil in the valve chamber 101 flows towards the outlet port 103 while being guided to the diverter port 104, thereby further increasing the hydraulic oil discharge flow rate.

[0042] refer to Figures 3 to 4 The pressure drop-reducible directional valve further includes at least one reset member 30. The flow control member 20 has a first free end 201 corresponding to the first end 1001 and a second free end 202 corresponding to the second end 1002. The reset member 30 is disposed in the valve cavity 101 and is located between the first end 1001 and the first free end 201 and / or between the second end 1002 and the second free end 202. The reset member 30 is configured to elastically deform when the flow control member 20 is driven to move between the first end 1001 and the second end 1002, so that the flow control member 20 is moved in a direction tending towards reset.

[0043] Preferably, the reset member 30 is implemented as a spring.

[0044] Preferably, two reset members 30 are provided, one between the first end 1001 and the other between the first free end 201, and the other between the second end 1002 and the third free end 202. When hydraulic oil is introduced into the valve chamber 101 through the inlet 102 and the inlet 102 is separated from the adjacent outlet 103 by the flow control member 20, the two reset members 30 are configured to overcome the hydraulic pressure exerted by the hydraulic oil in the valve chamber 101 on the flow control member 20, ensuring that the flow control member 20 is stably maintained in the position separating the inlet 102 and the outlet 103. In other words, since the reset members 30 are provided between the first end 1001 and the first free end 201 and between the second end 1002 and the third free end 202, the flow control member 20 will not shift its position separating the inlet 102 and the outlet 103 when it is not subjected to other external forces.

[0045] refer to Figures 3 to 4 Furthermore, the valve body 10 also forms a first port 105 at the first end 1001, the first port 105 being connected to the valve cavity 101 and oriented toward the moving direction of the flow control element 20.

[0046] The pressure drop reduction-capable reversing valve further includes at least one driving member 40, which is mounted on the valve body 10 and opposite to the first port 105. The flow control member 40 seals the first port 105. The driving member 40 is configured to drive the flow control member 20 to move within the valve cavity 101 between the first end 1001 and the second end 1002 to connect the inlet port 102 with the adjacent outlet port 103, thereby achieving connection or blockage between the inlet port 102 and the outlet port 103.

[0047] Preferably, the size of the first port 105 is not smaller than the cross-sectional size of the flow control element 20, and the flow control element 20 is detachably disposed in the valve cavity 101. Thus, the flow control element 20 can be inserted into or withdrawn from the valve cavity 101 through the first port 105, allowing for the replacement of different flow control elements 20 on the flow control wall 21 to adjust the flow rate introduced through the inlet 102 into the outlet 103, thereby adjusting the total outlet flow rate of the reversing valve with reduced pressure drop.

[0048] The driving member 40 includes a contact component 41, which is disposed at the first end 1001 of the flow control member 20 and can move along the moving direction of the flow control member 20 to drive the flow control member 20 to move in the valve cavity 101 between the first end 1001 and the second end 1002, so as to connect the liquid inlet 102 and the adjacent liquid outlet 103.

[0049] The actuator 41 includes an armature 411 and a linkage 412, the linkage 412 being installed between the armature 411 and the flow control element 20. The driving component 40 further includes a coil 42 and a mounting housing 43, the mounting housing 43 being installed on the valve body 10, the mounting housing 43 having a mounting cavity 4301 and an extension 4302 communicating with the mounting cavity 4301, the coil 42 being installed on the mounting housing 43, the armature 411 being magnetically connected to the coil 42, the coil 42 being configured to magnetize the armature 411 and drive the armature 411 to move along the mounting cavity 4301 so as to drive the flow control element 20 to move along the valve cavity 101 via the linkage 412 to connect the inlet 102 and the adjacent outlet 103.

[0050] It is worth mentioning that the end of the housing 43 is sealed to the first port 105 of the valve body 10 to prevent liquid from leaking from the first port 105.

[0051] Preferably, the armature 411 is configured to move along the mounting cavity 4301 close to the protrusion 4302 so as to push the flow control member 20 to move in the valve cavity 101 via the linkage 412, so that the liquid inlet 102 and the adjacent liquid outlet 103 can communicate through the valve cavity 101.

[0052] As deformable, the armature 411 is configured to move along the mounting cavity 4301 away from the protrusion 4302 so as to pull the flow control element 20 to move in the valve cavity 101 via the linkage 412, thereby achieving the purpose of connecting the liquid inlet 102 and the liquid outlet 103.

[0053] Preferably, the armature 411 is made of a soft magnetic material.

[0054] Preferably, one of each of the driving member 40 and the first port 105 is provided. In this case, the flow control member 20 is driven to move by the driving member 40 and reset by the elastic deformation of the reset member 30.

[0055] Alternatively, two drive members 40 and two first ports 105 are provided, with the two drive members 40 arranged opposite each other, and the two first ports 105 located at the first end 1001 and the second end 1002 of the valve cavity 101, respectively. In this case, the flow control element 20 can be driven to move by one of the drive members 40 and driven to move in the opposite direction by the other drive member 40. In this embodiment, the pressure drop-reducible reversing valve may not include the reset element 30.

[0056] To enable those skilled in the art to understand this embodiment, in at least one embodiment and corresponding figures below, the armature 411 is configured to move along the mounting cavity 4301 and approach the protrusion 4302 to push the flow control member 20 to move in the valve cavity 101 via the linkage 412, and both the driving member 40 and the first port 105 are provided as an example. Those skilled in the art should know that this is not a limitation of the present invention.

[0057] Specifically, when the coil 42 is energized and the armature 411 is moved along the mounting cavity 4301 towards the outlet 4302, the flow control element 20 is moved along the valve cavity 101 via the linkage 412, causing the flow control wall 21 to move away from the partition wall 11 and create a gap between them. At this time, the inlet 102 is connected to the outlet 103 through the valve cavity 101, and the two inlets 102 can guide the hydraulic oil to the two outlets 103 and the diversion port 104. At the same time, the reset element 30 undergoes elastic deformation. After the coil 42 is de-energized, the flow control element 20 is reset by the elastic action of the reset element 30 and pushes the contact component 41 to move in the opposite direction for subsequent continuous reversal.

[0058] Preferably, the flow control element 20 forms a guide wall 22 radially on the outer wall between the first free end 201 of the flow control element 20 and an adjacent flow control wall 21. The guide wall 22 is sealed against the inner wall of the valve body 10 forming the valve cavity 101. More preferably, the flow control element 20 forms a guide wall 22 radially on the outer wall between the first free end 201 and the second free end 202 of the flow control element 20 and their respective adjacent flow control walls 21.

[0059] Those skilled in the art will understand that, since the guide wall 22 can abut against the valve body 10 to form the inner wall of the valve cavity 101 during the movement of the flow control element 20, the flow control element 20 can be effectively prevented from deviating from the axial direction during movement.

[0060] It is worth mentioning that, in one embodiment, the guide wall 22, the valve body 10, the guide wall 22, and the driving member 40 form a first mounting space 1003 at the first end 1001 of the valve body 10 to accommodate one of the reset members 30, and the guide wall 22 and the valve body 10 form a second mounting space 1004 at the second end 1002 of the valve body 10 with the same volume and symmetrical to the first mounting space 1003, for mounting another reset member 30.

[0061] Those skilled in the art will understand that, since the first mounting space 1003 and the second mounting space 1004 have the same volume and are symmetrically formed on both sides of the valve body 10, even if fluid enters the first mounting space 1003 and / or the second mounting space 1004, the force on the flow control element 20 due to hydraulic fluctuations can be balanced. Therefore, without other external forces, the flow control element 20 will not shift to the position that blocks the liquid inlet 102 and the liquid outlet 103.

[0062] Furthermore, the guide wall 22 blocks the connection between the first mounting space 1003 and the second mounting space 1004 and the valve chamber 101. Therefore, the amount of liquid entering the first mounting space 1003 and the second mounting space 1004 can be reduced, thereby avoiding excessive hydraulic pressure caused by excessive liquid in the first mounting space 1003 and the second mounting space 1004. This effectively prevents the flow control component 20 from being unable to be driven by excessive hydraulic pressure in the first mounting space 1003 and the second mounting space 1004 when the driving component 40 drives the flow control component 20.

[0063] The valve body 10 also has at least one external discharge channel 106 and an external discharge port 107 communicating with the external discharge channel 106. The external discharge port 107 is connected to an external oil tank, and the external discharge channel 106 is connected to the first mounting space 1003 and the second mounting space 1004. The external discharge channel 106 is configured to discharge hydraulic oil introduced into the valve chamber 101 from the first mounting space 1003 and the second mounting space 1004 through the external discharge port 107.

[0064] It is worth mentioning that when the flow control element 20 is driven by the driving member 40 to move along the valve cavity 101 to connect the inlet 102 and the adjacent outlet 103, and the hydraulic pressure in the valve cavity 101 is greater than a predetermined hydraulic pressure, the hydraulic oil in the valve cavity 101 may enter the first installation space 1003 and / or the second installation space 1004 from between the guide wall 22 and the inner wall of the valve body 10 that abuts against the guide wall 22. The excessive hydraulic pressure in the outflow channel 106 will not only hinder the reset of the flow control element 20, but also hinder the driving member 40 from pushing the flow control element 20. Hydraulic oil in the external discharge channel 106 is discharged to relieve pressure, eliminating the impact of dynamic pressure on the control component 40, extending its service life, and effectively preventing the hydraulic pressure in the first installation space 1003 and / or the second installation space 1004 from affecting the reversing of the flow control component 20. This ensures that the reversing valve with reduced pressure drop can be used normally and with higher sensitivity. In addition, while relieving pressure, the pressure of the hydraulic oil itself flowing into the inlet 102 and out of the outlet 103 is also prevented.

[0065] As deformable, the first installation space 1003 and the second installation space 1004 are respectively connected to an external oil tank through an external discharge channel 106 and an external discharge port 107 connected to the external discharge channel 106.

[0066] refer to Figures 3 to 4 The pressure drop reduction directional valve also includes at least one seal 70, which is installed between the drive member 40 and the valve body 10 to increase the sealing of the connection and prevent hydraulic oil leakage.

[0067] Preferably, the seal 70 is implemented as a sealing ring.

[0068] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments; any variations or modifications can be made to the implementation of the present invention without departing from these principles.

Claims

1. A directional control valve with reduced pressure drop, installed between a hydraulic motor and a hydraulic source, characterized in that, The directional control valves with reduced pressure drop include: A valve body having a first end and a second end opposite to the first end, wherein the valve body forms a valve cavity between the first end and the second end, and the valve body forms at least two inlets communicating with the hydraulic source and at least two outlets communicating with the oil motor, the inlets and outlets communicating with the valve cavity, the outlets being spaced apart from the inlets, and the valve body forming an inner wall of the valve cavity defining at least two partition walls spaced apart, each partition wall being located between one of the inlets and one of the outlets; A flow control element is disposed in the valve cavity and is movably movable between a first end and a second end. The flow control element has at least two flow control walls, and each of the partition walls is sealingly abutting against one of the flow control walls to block one of the inlet ports and one of the outlet ports in the valve cavity, thereby preventing fluid from flowing from the corresponding inlet port to the corresponding outlet port. After the flow control element moves a predetermined distance, the partition walls are offset from the corresponding flow control walls so that the corresponding inlet port is connected to the corresponding outlet port via the valve cavity, allowing fluid to enter from the inlet port, flow out through the outlet port via the valve cavity, and when the inlet port is connected to the valve cavity before the outlet port, the high-pressure fluid injected from the inlet port can provide the flow control element with the opposite pressure to balance the force on the flow control element caused by the high-pressure fluid that tends to move between the first end and the second end.

2. The directional control valve with reduced pressure drop according to claim 1, characterized in that, The valve body also has at least one diversion port, which is connected to the liquid outlet.

3. The directional control valve with reduced pressure drop according to claim 1, characterized in that, The two liquid outlets are positioned between the two liquid inlets.

4. The directional control valve with reduced pressure drop according to any one of claims 1 to 3, characterized in that, The pressure drop reduction-capable reversing valve further includes at least one reset member, the flow control member having a first free end corresponding to the first end and a second free end corresponding to the second end, the reset member being located between the first end and the first free end and / or between the second end and the second free end, the reset member being disposed in the valve cavity in such a way that it can undergo elastic deformation when the flow control member is driven to move between the first end and the second end, so that the flow control member is moved in a direction tending to reset.

5. The directional control valve with reduced pressure drop according to claim 4, characterized in that, The reset device has two locations, one between the first end and the first free end, and the other between the second end and the second free end.

6. The directional control valve with reduced pressure drop according to claim 4, characterized in that, The valve body also forms a first port at the first end, the first port being connected to the valve cavity and facing the direction of movement of the flow control element. The pressure drop-reducible reversing valve further includes at least one driving member, the driving member being installed on the valve body and opposite to the first port, and the flow control element sealingly blocking the first port. The driving member is configured to drive the flow control element to move within the valve cavity between the first end and the second end to connect the inlet to the adjacent outlet.

7. The directional control valve with reduced pressure drop according to claim 6, characterized in that, The flow control element forms a guide wall radially between the outer wall of the first free end and the second free end of the flow control element and the adjacent flow control wall of the respective element. The guide wall, the valve body, the guide wall and the driving member form a first mounting space at the first end of the valve body to accommodate one reset member. The guide wall and the valve body form a second mounting space of the same volume and symmetrical to the first mounting space at the second end of the valve body for mounting another reset member.

8. The directional control valve with reduced pressure drop according to claim 7, characterized in that, The valve body also has at least one external discharge channel and an external discharge port communicating with the external discharge channel. The first installation space and the second installation space are respectively connected to an external oil tank through one of the external discharge channels and one external discharge port communicating with the external discharge channel.

9. The directional control valve with reduced pressure drop according to claim 7, characterized in that, The valve body also has at least one external discharge channel and an external discharge port communicating with the external discharge channel. The external discharge port is connected to an external oil tank, and the external discharge channel is connected to the first installation space and the second installation space.

10. The directional control valve with reduced pressure drop according to claim 7, characterized in that, The pressure drop reduction-capable directional valve also includes at least one seal that is mounted between the drive member and the valve body.

Images