Liquid direction control valve

Abstract

The invention relates to the technical field of liquid control valves, in particular to a liquid direction control valve. The control valve comprises a shell of the control valve, a liquid injection opening and a liquid inlet are formed in the top and the bottom of the shell respectively, an upper cavity channel and a lower cavity channel are formed in the two sides of the shell respectively, an oil storage cavity is formed in the shell, a first butt joint opening is formed in the bottom of the inner wall of the oil storage cavity, and the bottom of the first butt joint opening is communicated with the liquid inlet; a second butt joint opening is formed in the top of the oil storage cavity, and an ejector rod is arranged between the first butt joint opening and the second butt joint opening. When the ejector rod moves upwards, the connecting plate and the closing plate can move upwards together with the ejector rod, so that the closing plate closes the upper cavity channel and opens the lower cavity channel, oil can flow out of the lower cavity channel, and oil is provided for the hydraulic device. And when the ejector rod moves downwards, the bottom of the ejector rod extends out of the blocking block, so that oil enters the oil storage cavity from the interior of the ejector rod and flows out of the interior of the opened upper cavity channel.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid control valves, in particular to a liquid directional control valve. Background Art

[0002] Hydraulic valves are used to control the flow direction of oil in hydraulic systems or adjust its flow and pressure. As a type of hydraulic valve, directional control valves control the flow direction of oil by changing the flow channel.

[0003] Directional control valves generally change the direction of oil flow by changing pressure conditions. When the pressure inside the control valve reaches a certain value, the pressure control valve core moves according to the pressure change, thereby achieving the flow of oil and opening and closing different flow channels, allowing the oil to flow through different channels to meet the system's requirements for liquid flow paths under different pressure conditions.

[0004] In the hydraulic system, the directional control valve plays a vital role. It can accurately guide the oil into different cavities, thereby effectively controlling the movement of the hydraulic device. Usually, the directional control valve can only perform oil delivery operations for a single hydraulic device. However, when faced with a situation where two hydraulic devices need to move synchronously, if the conventional practice of equipping the two hydraulic devices with directional control valves to deliver oil is still adopted, the problem of asynchronous control of the hydraulic devices is very likely to occur. In view of this, a liquid directional control valve that can synchronously deliver oil to two hydraulic devices is needed to ensure that the two hydraulic devices can achieve precise synchronization during movement. Summary of the invention

[0005] The object of the present invention is to provide a liquid directional control valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides a liquid directional control valve, including a housing of the control valve, wherein a liquid injection port and a liquid inlet are respectively provided at the top and the bottom of the housing, wherein the liquid inlet is used to introduce oil into the housing of the control valve, an upper cavity and a lower cavity are provided at both sides of the housing, and the two upper cavities and the lower cavity are respectively used to provide oil to two hydraulic devices, an oil storage chamber is provided inside the housing, a docking port 1 is provided at the bottom of the inner wall of the oil storage chamber, the bottom of the docking port 1 is communicated with the liquid inlet, a docking port 2 is provided at the top of the oil storage chamber, and a push rod is provided between the docking port 1 and the docking port 2;

[0007] A connecting plate is fixedly sleeved on the outer surface of the push rod, and closing components are installed on both sides of the connecting plate. The upper cavity and the lower cavity are connected to the oil storage cavity, and the two upper cavities and the lower cavity are respectively opened on both sides of the oil storage cavity. The closing component is used to close the upper cavity and the lower cavity. An extrusion component is provided on the outer surface of the push rod, and the extrusion component is used to close the docking interface 1 and the liquid inlet.

[0008] As a further improvement of the present technical solution, the closing component includes a closing plate fixedly mounted on the outside of the connecting plate, a plug-in column is fixedly mounted on the top of the closing plate, a plug-in interface is provided on the top of the inner wall of the oil storage cavity, the top of the plug-in column is plugged into the interior of the plug-in interface, and the closing plate can be raised and lowered to close the upper cavity and the lower cavity.

[0009] As a further improvement of the present technical solution, two closing plates are provided, and the two closing plates are symmetrically distributed on both sides of the connecting plate, and are used to close the upper cavity and the lower cavity on both sides of the inner wall of the oil storage cavity.

[0010] As a further improvement of the present technical solution, the extrusion assembly includes a blocking block slidably sleeved on the outer surface of the push rod, the bottom of the blocking block is set to a cone, the blocking block is set at the top of the docking interface one, an extrusion spring is installed on the top of the blocking block, the top of the extrusion spring is installed on the bottom of the connecting plate, the extrusion spring is sleeved on the outer surface of the push rod, the bottom of the blocking block is squeezed to compress the extrusion spring, so that the blocking block moves upward on the outer surface of the push rod, opening the docking interface one and the liquid inlet.

[0011] As a further improvement of the technical solution, the bottom of the push rod penetrates the block and extends to the outside of the block, and a fixing ring is fixedly installed on the bottom of the push rod.

[0012] As a further improvement of the present technical solution, a pressure chamber is opened at the top of the docking interface 2, a piston ring is slidably installed inside the pressure chamber, a docking column is fixedly installed on the bottom of the piston ring, and the bottom of the docking column passes through the pressure chamber and extends to the interior of the docking interface 2.

[0013] As a further improvement of the present technical solution, the bottom of the docking column is arranged at the top of the push rod, and the injection port is connected to the pressure chamber. The injection port is used to add pressurized oil into the pressure chamber so that the pressurized oil squeezes the piston ring and the docking column to push the push rod downward.

[0014] As a further improvement of the technical solution, an oil passage is provided at the bottom of the outer surface of the push rod for circulating the oil from the inside of the push rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the liquid directional control valve, when oil is transported to the upper cavity, the oil is injected into the liquid inlet and the docking port 1 through the supply device, so that the oil forms an upward squeezing force on the push rod and the blocking block, and then the push rod and the blocking block move upward together, so that the blocking block no longer closes the docking port 1, and the oil enters the interior of the oil storage cavity. When the push rod moves upward, the connecting plate and the closing plate move upward together with the push rod, so that the closing plate closes the upper cavity and opens the lower cavity, so that the oil can flow out from the interior of the lower cavity to provide oil to the hydraulic device.

[0017] 2. In the liquid directional control valve, when oil is provided to the upper cavity, the pressure oil enters into the pressure cavity from the filling port, and the pressure oil squeezes the piston ring and the docking column, so that the docking column squeezes the push rod downward, and the extrusion spring squeezes the block, so that the block closes the docking port, and the push rod continues to move downward, and the bottom of the push rod extends out of the block, so that the oil port opened on the outer surface of the push rod can contact the oil inside the liquid inlet, and the oil enters into the oil storage cavity from the inside of the push rod, and flows out from the opened upper cavity.

[0018] 3. In the liquid directional control valve, an upper cavity and a lower cavity are provided on both sides of the oil storage cavity, so that the oil can flow out from the opened upper cavity or lower cavity synchronously to provide oil to two hydraulic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the upper cavity and the lower cavity of the present invention;

[0021] Figure 3 It is a schematic diagram of the top rod structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the internal structure of the housing of the present invention;

[0023] Figure 5 It is a schematic diagram of the block structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the piston ring structure of the present invention;

[0025] Figure 7 It is a schematic diagram of the oil passage structure of the present invention.

[0026] The meaning of each number in the figure is:

[0027] 1. Shell; 11. Liquid filling port; 12. Liquid inlet;

[0028] 21. Upper cavity; 22. Lower cavity; 3. Oil storage cavity; 31. Docking port 1; 32. Docking port 2;

[0029] 4. ejector rod; 41. connecting plate; 42. closing assembly; 401. closing plate; 402. plug-in column;

[0030] 5. Extrusion assembly; 501. Block; 502. Extrusion spring;

[0031] 6. Fixed ring;

[0032] 7. Pressure chamber; 71. Piston ring; 72. Docking column;

[0033] 8. Oil port. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example

[0036] See also Figure 1-Figure 4 As shown, the purpose of this embodiment is to provide a liquid directional control valve, including a housing 1 of the control valve, a liquid injection port 11 and a liquid inlet 12 are respectively provided at the top and bottom of the housing 1, the liquid inlet 12 is used to introduce oil into the control valve housing 1, an upper cavity 21 and a lower cavity 22 are provided on both sides of the housing 1, the two upper cavities 21 and the lower cavity 22 are respectively used to provide oil to two hydraulic devices, an oil storage chamber 3 is provided inside the housing 1, a docking port 1 31 is provided at the bottom of the inner wall of the oil storage chamber 3, the bottom of the docking port 1 31 is connected to the liquid inlet 12, a docking port 2 32 is provided at the top of the oil storage chamber 3, and a push rod 4 is provided between the docking port 1 31 and the docking port 2 32;

[0037] A connecting plate 41 is fixedly sleeved on the outer surface of the push rod 4, and closing components 42 are installed on both sides of the connecting plate 41. The upper cavity 21 and the lower cavity 22 are connected to the oil storage chamber 3, and the two upper cavities 21 and the lower cavity 22 are respectively opened on both sides of the oil storage chamber 3. The closing component 42 is used to close the upper cavity 21 and the lower cavity 22. The outer surface of the push rod 4 is provided with an extrusion component 5, and the extrusion component 5 is used to close the docking interface 31 and the liquid inlet 12.

[0038] By opening an oil storage chamber 3 inside the housing 1, oil can enter the oil storage chamber 3 from the liquid inlet 12 and the first docking port 31, and a second docking port 32 is opened on the top of the inner wall of the oil storage chamber 3. The push rod 4 can be installed between the first docking port 31 and the second docking port 32, so that the push rod 4 is located inside the oil storage chamber 3. The top of the first docking port 31 is provided with an extrusion component 5, so that the push rod 4 can be squeezed by the extrusion component 5 to close the first docking port 31 and the liquid inlet 12, and the connecting plate 41 fixedly installed on the outer surface of the push rod 4 can be connected to the closing component 42, so that the closing component 4 2 closes the upper cavity 21 and the lower cavity 22. When the oil is injected into the docking port 1 31 from the liquid inlet 12, the oil will squeeze the push rod 4 and the extrusion assembly 5, so that the push rod 4 and the closing assembly 42 move upward to open the docking port 1 31. At the same time, the connecting plate 41 and the closing assembly 42 move upward together with the push rod 4 to open the lower cavity 22, so that the oil is injected into the oil storage chamber 3 and flows out from the lower cavity 22. The push rod 4 can also move downward from the docking port 2 32 to open the upper cavity 21, so as to achieve the effect of changing the direction of the oil and flowing through the upper cavity 21 and the lower cavity 22 respectively.

[0039] First, considering how to close the upper cavity 21 and the lower cavity 22 respectively, Figure 3 and Figure 4 , the specific structure of the closing component 42 is disclosed. The closing component 42 includes a closing plate 401 fixedly mounted on the outside of the connecting plate 41, a plug-in column 402 is fixedly mounted on the top of the closing plate 401, a plug-in interface is provided on the top of the inner wall of the oil storage chamber 3, and the top of the plug-in column 402 is plugged into the inside of the plug-in interface. The closing plate 401 can be raised and lowered to close the upper cavity 21 and the lower cavity 22. Two closing plates 401 are provided, and the two closing plates 401 are symmetrically distributed on both sides of the connecting plate 41, and are used to close the upper cavity 21 and the lower cavity 22 on both sides of the inner wall of the oil storage chamber 3.

[0040] Furthermore, the closing plate 401 is fixedly connected by the connecting plate 41, so that the closing plate 401 fits on the outer sides of the upper cavity 21 and the lower cavity 22, and the top of the closing plate 401 is fixedly installed with a plug-in interface that is plugged into the top of the inner wall of the oil storage cavity 3, so that when the push rod 4 drives the connecting plate 41 and the closing plate 401 to move up and down, the plug-in column 402 makes the closing plate 401 move up and down in a stable and horizontal manner, and then the closing plate 401 opens and closes the upper cavity 21 and the lower cavity 22 respectively by moving up and down.

[0041] Secondly, considering the problem of how the push rod 4 moves upward to inject oil into the lower cavity 22, Figure 5, the specific structure of the extrusion assembly 5 is disclosed, the extrusion assembly 5 includes a block 501 slidably sleeved on the outer surface of the push rod 4, the bottom of the block 501 is set to be conical, the block 501 is set at the top of the docking interface 31, the top of the block 501 is installed with an extrusion spring 502, the top of the extrusion spring 502 is installed at the bottom of the connecting plate 41, the extrusion spring 502 is sleeved on the outer surface of the push rod 4, the bottom of the block 501 is squeezed to compress the extrusion spring 502, so that the block 501 moves upward on the outer surface of the push rod 4, and the docking interface 31 and the liquid inlet 12 are opened. The bottom of the push rod 4 penetrates the block 501 and extends to the outside of the block 501, and the bottom of the push rod 4 is fixedly installed with a fixing ring 6.

[0042] Furthermore, by sleeve-fitting the blocking block 501 on the outer surface of the push rod 4, the blocking block 501 will slide down to the docking interface 31, and the cone set at the bottom of the blocking block 501 can close the docking interface 31. In order to further enhance the closing tightness of the blocking block 501, the middle of the blocking block 501 and the connecting plate 41 are connected by an extrusion spring 502, so that the extrusion spring 502 squeezes the blocking block 501 and squeezes the blocking block 501 at the docking interface 31, and the extrusion spring 502 also squeezes the push rod 4 and the connecting plate 41, so that the bottom of the push rod 4 is fixedly mounted on the fixing ring 6, and the top of the fixing ring 6 is fitted to the bottom of the blocking block 501, and the fixing ring 6 is arranged inside the liquid inlet 12. When oil is injected into the liquid inlet 12, the fixing ring 6 and the blocking block 501 will be squeezed, so that the push rod 4 and the blocking block 501 move upward, the docking interface 31 is opened, and the oil enters the oil storage chamber 3 and flows out from the inside of the lower cavity 22.

[0043] Finally, considering how the push rod 4 moves downward to open the upper cavity 21 to inject oil, the following example is presented: Figure 6 and Figure 7 A pressure chamber 7 is provided at the top of the second docking interface 32, a piston ring 71 is slidably mounted inside the pressure chamber 7, a docking column 72 is fixedly mounted at the bottom of the piston ring 71, and the bottom of the docking column 72 penetrates the pressure chamber 7 and extends to the inside of the second docking interface 32. The bottom of the docking column 72 is arranged at the top of the push rod 4, and the injection port 11 is connected to the pressure chamber 7. The injection port 11 is used to fill the pressure chamber 7 with pressurized oil, so that the pressurized oil squeezes the piston ring 71 and the docking column 72, and pushes the push rod 4 downward. An oil through port 8 is provided at the bottom of the outer surface of the push rod 4, which is used to circulate the oil from the inside of the push rod 4.

[0044] By opening a pressure chamber 7 connected to the injection port 11 at the top of the second docking interface 32, when oil needs to be injected into the upper cavity 21, the pressure oil enters the pressure chamber 7 from the injection port 11, and squeezes the piston ring 71, so that the docking column 72 at the bottom of the piston ring 71 squeezes the push rod 4 in the second docking interface 32 downward, so that the push rod 4 moves downward, and then the connecting plate 41 on the outer surface of the push rod 4 moves downward together with the closing plate 401 to close the lower cavity 22 and open the upper cavity 21. The extrusion spring 502 will squeeze the blocking block 501, so that the blocking block 501 is pressed against the docking interface 1 31 to close it, so that the bottom of the push rod 4 extends out of the blocking block 501, and then the oil through port 8 opened on the outer surface of the push rod 4 is exposed, and the oil can enter the interior of the oil storage chamber 3 from the oil through port 8, and the oil flows out from the upper cavity 21, so as to achieve the effect of injecting oil into the upper cavity 21.

[0045] In summary, the working principle of this solution is as follows:

[0046] When the oil is transported to the upper cavity 21, the oil is injected into the liquid inlet 12 and the docking port 31 through the supply device, so that the oil exerts an upward squeezing force on the push rod 4 and the block 501, thereby causing the push rod 4 and the block 501 to move upward together, so that the block 501 no longer closes the docking port 31, and the oil enters the interior of the oil storage chamber 3. When the push rod 4 moves upward, the connecting plate 41 and the closing plate 401 move upward together with the push rod 4, so that the closing plate 401 closes the upper cavity 21 and opens the lower cavity 22, so that the oil can flow out from the interior of the lower cavity 22, and provide oil to the hydraulic device;

[0047] When oil is provided to the upper cavity 21, the pressure oil enters the interior of the pressure chamber 7 from the injection port 11, and the pressure oil will squeeze the piston ring 71 and the docking column 72, so that the docking column 72 squeezes the push rod 4 downward, and the extrusion spring 502 on the outer surface of the push rod 4 squeezes the block 501 and closes it to the interior of the docking port 31, and the push rod 4 continues to move downward, and the bottom of the push rod 4 extends out of the block 501, so that the oil port 8 opened on the outer surface of the push rod 4 can contact the oil inside the liquid inlet 12, and the oil enters the interior of the oil storage chamber 3 from the interior of the push rod 4, and flows out from the opened upper cavity 21, and the upper cavity 21 and the lower cavity 22 are provided on both sides of the oil storage chamber 3, so that the oil can flow out from the opened upper cavity 21 or the lower cavity 22 synchronously, so as to provide oil to the two hydraulic devices.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A liquid directional control valve, comprising a control valve housing (1), wherein the top and bottom of the housing (1) are respectively provided with a liquid injection port (11) and a liquid inlet (12), wherein the liquid inlet (12) is used to introduce oil into the control valve housing (1), and wherein: An upper cavity (21) and a lower cavity (22) are provided on both sides of the housing (1), and the two upper cavities (21) and the two lower cavities (22) are used to provide oil to two hydraulic devices respectively. An oil storage cavity (3) is provided inside the housing (1), and a docking port (31) is provided at the bottom of the inner wall of the oil storage cavity (3), and the bottom of the docking port (31) is connected to the liquid inlet (12). A docking port (32) is provided at the top of the oil storage cavity (3), and a push rod (4) is provided between the docking port (31) and the docking port (32). The outer surface of the push rod (4) is fixedly sleeved with a connecting plate (41), and closing components (42) are installed on both sides of the connecting plate (41). The upper cavity (21) and the lower cavity (22) are connected to the oil storage cavity (3), and the two upper cavities (21) and the lower cavity (22) are respectively arranged on both sides of the oil storage cavity (3). The closing component (42) is used to close the upper cavity (21) and the lower cavity (22). The outer surface of the push rod (4) is provided with an extrusion component (5), and the extrusion component (5) is used to close the docking port (31) and the liquid inlet (12).

2. The liquid directional control valve according to claim 1, characterized in that: The closing assembly (42) includes a closing plate (401) fixedly mounted on the outside of the connecting plate (41), a plug-in column (402) fixedly mounted on the top of the closing plate (401), a plug-in interface opened on the top of the inner wall of the oil storage cavity (3), the top of the plug-in column (402) plugged into the inside of the plug-in interface, and the closing plate (401) can be raised and lowered to close the upper cavity (21) and the lower cavity (22).

3. The liquid directional control valve according to claim 2, characterized in that: Two closing plates (401) are provided, and the two closing plates (401) are symmetrically distributed on both sides of the connecting plate (41) and are used to close the upper cavity (21) and the lower cavity (22) on both sides of the inner wall of the oil storage cavity (3).

4. The liquid directional control valve according to claim 1, characterized in that: The extrusion assembly (5) comprises a block (501) slidably sleeved on the outer surface of the push rod (4); the bottom of the block (501) is arranged in a conical shape; the block (501) is arranged at the top of the docking port (31); a squeezing spring (502) is installed on the top of the block (501); the top of the squeezing spring (502) is installed on the bottom of the connecting plate (41); the squeezing spring (502) is sleeved on the outer surface of the push rod (4); the bottom of the block (501) is squeezed to compress the squeezing spring (502), so that the block (501) moves upward on the outer surface of the push rod (4), thereby opening the docking port (31) and the liquid inlet (12).

5. The liquid directional control valve according to claim 4, characterized in that: The bottom of the push rod (4) passes through the block (501) and extends to the outside of the block (501), and a fixing ring (6) is fixedly mounted on the bottom of the push rod (4).

6. The liquid directional control valve according to claim 1, characterized in that: A pressure chamber (7) is provided at the top of the second docking interface (32), a piston ring (71) is slidably mounted inside the pressure chamber (7), a docking column (72) is fixedly mounted at the bottom of the piston ring (71), and the bottom of the docking column (72) passes through the pressure chamber (7) and extends to the inside of the second docking interface (32).

7. The liquid directional control valve according to claim 6, characterized in that: The bottom of the docking column (72) is arranged on the top of the push rod (4), and the injection port (11) is connected to the pressure chamber (7). The injection port (11) is used to inject pressurized oil into the pressure chamber (7), so that the pressurized oil squeezes the piston ring (71) and the docking column (72), thereby pushing the push rod (4) downward.

8. The liquid directional control valve according to claim 6, characterized in that: An oil passage (8) is provided at the bottom of the outer surface of the push rod (4) for circulating oil from the inside of the push rod (4).

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