Double-layer hydraulic valve

Abstract

The upper layer of the hydraulic valve is a driving module, and the lower layer of the hydraulic valve is a valve body module; the valve body module comprises a plurality of valve body units and a swing rod, the valve body units are arranged on the same side of the swing rod or symmetrically arranged on the two sides of the swing rod, a valve element of each valve body unit is provided with an ejector rod, and the ejector rods make contact with the lower end of the swing rod. The driving module comprises a driving unit and a transmission unit, and the driving unit is connected with the upper end of the swing rod through the transmission unit and drives the swing rod to generate displacement in the horizontal direction. When the motor / electromagnet drives the swing rod to swing, the ejector rod is driven to move, the ejector rod moves to push the valve element to move so as to open and close the valve element, and different functions of the valve are achieved through different combinations. The cavities are stacked in an overlapped mode, so that the overall size of the valve is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of seat valves, and in particular to a double-layer hydraulic valve. Background Art

[0002] Currently, manufacturers of various three-position, four-way valves on the market generally use a sliding valve structure in which the valve core and valve body slide relative to each other, relying on the grooves in the valve core and valve body to form the flow channel. In actual use, due to structural limitations, the sealing effect of the sliding valve is not as good as that of the seat valve, resulting in oil leakage. In addition, the sliding valve has high requirements for the viscosity of the liquid medium, which makes it insufficient for application in complex working conditions and clean environments. To solve this problem, it is necessary to innovate and overcome the disadvantages and change the design scheme. Summary of the Invention

[0003] The present invention aims to address the deficiencies of the prior art and to provide a double-layer hydraulic valve.

[0004] The object of the present invention is achieved through the following technical solutions: a double-layer hydraulic valve, the upper layer of which is a drive module and the lower layer is a valve body module;

[0005] The valve body module includes a plurality of valve body units and a swing rod. The valve body units are arranged on the same side of the swing rod, or symmetrically arranged on both sides of the swing rod. A push rod is provided on the valve core of each valve body unit, and the push rods are in contact with the lower end of the swing rod.

[0006] The driving module includes a driving unit and a transmission unit. The driving unit is connected to the upper end of the swing arm through the transmission unit to drive the swing arm to generate displacement in the horizontal direction.

[0007] Furthermore, there are four valve body units, which are symmetrically arranged on both sides of the swing rod, and two valve body units on each side are arranged side by side up and down to form a three-position four-way valve.

[0008] Furthermore, there are two valve body units, which are symmetrically arranged on both sides of the swing rod to form a symmetrical three-position three-way valve.

[0009] Furthermore, there are two valve body units, which are arranged on the same side of the swing rod and arranged side by side up and down to form a horizontal three-position three-way valve.

[0010] Furthermore, there are four valve body units, which are arranged on the same side of the swing rod and are arranged in two groups in the same direction, forming a same-direction three-position four-way valve.

[0011] Furthermore, the driving module adopts a motor-lateral driven swing arm driving mode, specifically: the upper end of the swing arm is connected to the ball screw, the motor is connected to the ball screw nut, the motor drives the nut to rotate to push the ball screw to move on the X-axis, and the lower end of the swing arm contacts the top rod on the valve body module to open or close the valve core.

[0012] Furthermore, the driving module is driven by an electromagnet, specifically: the upper end of the swing arm is connected to the transmission rod, electromagnets are provided on both sides of the transmission rod, and a reset spring is installed between the transmission rod and the electromagnetic head of the electromagnet; the electromagnets on the left and right sides are energized to drive the transmission rod to move on the X-axis, and the lower end of the swing arm contacts the top rod on the valve body module to open or close the valve core.

[0013] Furthermore, the driving module adopts a motor-direct-driven eccentric wheel driving mode, specifically: the upper end of the swing arm is connected to the eccentric wheel, the eccentric wheel is connected to the rotor of the motor through a transmission shaft, the rotation of the rotor can drive the transmission shaft to rotate, and the lower end of the swing arm contacts the top rod on the valve body module to open or close the valve core.

[0014] Beneficial effects of the present invention:

[0015] (1) The double-layer structure integrates four sets of seat valves into a double-layer hydraulic valve. The valve has a compact structure, small size, large flow rate, and can be used with media with low viscosity such as water. At the same time, the seat valve has a better sealing effect than the slide valve, has lower requirements for the operating environment and operating temperature, and is suitable for more working conditions and can meet the needs of different occasions and working conditions.

[0016] (2) The driving part and the valve body are separated, and the liquid medium will not affect the driving part during operation.

[0017] (3) The drive is independent of the valve body operation, making the drive mode diversified and the valve drive mode can be adjusted according to different needs. It can be divided into lateral motor drive ( Figure 1-Figure 3 、 Figure 10-13 ), electromagnet drive ( Figure 4-Figure 6 、 Figure 14-17 ) and motor direct drive eccentric wheel drive ( Figure 7-Figure 9 、 Figures 18-21 ).

[0018] (4) Different valve structures can be arranged according to different needs and application scenarios to achieve different functions. The hydraulic valve can be adjusted to a three-position four-way valve ( Figure 1 、 Figure 4 、 Figure 7 ), Symmetrical three-way valve ( Figure 2 、 Figure 5 、 Figure 8 ), horizontal three-way valve ( Figure 3 、 Figure 6 、 Figure 9 ) and the same direction three-position four-way valve ( Figure 10-Figure 21 ).

[0019] (5) The valve cores of the three-position four-way valve body are used symmetrically in pairs, which is a force-balanced structure that allows a large pressure difference. The control is also symmetrical during operation, reducing control requirements.

[0020] (6) The valve cores of the three-position three-way valve body are independent of each other, and the control methods are independent of each other. With separate control, the opening and closing of each valve core will not interfere with the opening and closing of other valve cores, reducing the control requirements and the possibility of leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 Schematic diagram of a three-position four-way valve driven by a lateral motor;

[0023] Figure 2 Schematic diagram of a symmetrical three-position three-way valve driven by a lateral motor;

[0024] Figure 3 Schematic diagram of a horizontally mounted three-position three-way valve driven by a lateral motor;

[0025] Figure 4 Schematic diagram of a three-position four-way valve driven by an electromagnet;

[0026] Figure 5 Schematic diagram of a symmetrical three-position, three-way valve driven by an electromagnet;

[0027] Figure 6 Schematic diagram of a horizontally mounted three-position three-way valve driven by an electromagnet;

[0028] Figure 7 This is a schematic diagram of a three-position four-way valve driven by an electric motor directly driving an eccentric wheel;

[0029] Figure 8 This is a schematic diagram of a symmetrical three-position, three-way valve driven by an electric motor directly driving an eccentric wheel;

[0030] Figure 9 This is a schematic diagram of a 3-way valve with a same direction and a horizontal position driven by an electric motor directly driving an eccentric wheel;

[0031] Figure 10 This is a schematic diagram of the valve core position of a unidirectional three-position four-way valve driven by a lateral motor;

[0032] Figure 11 This is a cross-sectional diagram of the right valve core of a unidirectional three-position four-way valve driven by a lateral motor;

[0033] Figure 12 This is a schematic diagram of the cross-sectional position of the left valve core of a unidirectional three-position four-way valve driven by a lateral motor;

[0034] Figure 13This is a cross-sectional diagram of the left valve core of a unidirectional three-position four-way valve driven by a lateral motor;

[0035] Figure 14 This is a schematic diagram of the valve core position of a three-position four-way valve driven by an electromagnet;

[0036] Figure 15 This is a cross-sectional diagram of the right valve core of a three-position four-way valve driven by an electromagnet;

[0037] Figure 16 This is a schematic diagram of the cross-sectional position of the left valve core of a three-position four-way valve driven by an electromagnet;

[0038] Figure 17 This is a cross-sectional diagram of the left valve core of a three-position, four-way valve driven by an electromagnet;

[0039] Figure 18 This is a schematic diagram of the valve core position of a unidirectional three-position four-way valve driven by a motor directly driven eccentric wheel;

[0040] Figure 19 This is a cross-sectional diagram of the right valve core of a unidirectional three-position four-way valve driven by an electric motor directly.

[0041] Figure 20 This is a schematic diagram of the cross-sectional position of the left valve core of a unidirectional three-position four-way valve driven by a motor directly driven eccentric wheel;

[0042] Figure 21 This is a cross-sectional diagram of the left valve core of a unidirectional, three-position, four-way valve directly driven by an electric motor and an eccentric wheel. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] like Figures 1-9 As shown, the present invention provides a double-layer hydraulic valve, the upper layer is a drive module, and the lower layer is a valve body module;

[0045] The valve body module is integrated and includes a plurality of valve body units and a swing rod. A push rod is provided on the valve core of each valve body unit, and the push rods are in contact with the swing rod.

[0046] The first embodiment of the present invention is provided with four valve body units, which are symmetrically arranged on both sides of the swing rod, with two valve body units on each side arranged side by side, forming a three-position four-way valve;

[0047] The second embodiment of the present invention is provided with two valve body units, which are symmetrically arranged on both sides of the swing rod to form a symmetrical three-position three-way valve;

[0048] The third embodiment of the present invention is provided with two valve body units, which are arranged on the same side of the swing rod and arranged side by side up and down to form a horizontal three-way valve;

[0049] The fourth embodiment of the present invention is provided with four valve body units, which are arranged on the same side of the swing rod and arranged in the same direction to form a same-direction three-position four-way valve;

[0050] The drive module includes three drive modes: motor side drive swing rod drive, electromagnet drive or motor direct drive eccentric wheel drive;

[0051] The motor drives the swing lever laterally as follows: the upper end of the swing lever is connected to the ball screw, the motor is connected to the ball screw nut, the motor drives the nut to rotate to push the ball screw to move on the X-axis, and the lower end of the swing lever contacts the push rod on the valve body module to open or close the valve core of the valve body module;

[0052] The electromagnet drive is specifically as follows: the upper end of the swing lever is connected to the transmission lever, and electromagnets are provided on both sides of the transmission lever. A return spring is installed between the transmission lever and the electromagnetic head of the electromagnet; when the electromagnets on the left and right sides are energized, the transmission lever is driven to move on the X-axis, and the lower end of the swing lever contacts the push rod on the valve body module, opening or closing the valve core of the valve body module;

[0053] The motor directly drives the eccentric wheel as follows: the upper end of the swing rod is connected to the eccentric wheel, the eccentric wheel is connected to the rotor of the motor through the transmission shaft, the rotation of the rotor can drive the transmission shaft to rotate, and the lower end of the swing rod contacts the top rod on the valve body module to open or close the valve core of the valve body module.

[0054] The valve body of this invention integrates multiple sets of conventional seat valves into a single structure. Depending on the needs and application scenarios, this hydraulic valve can be configured as a three-position four-way valve, a symmetrical three-position three-way valve, a horizontal three-position three-way valve, and a same-direction three-position four-way valve. Different valve configurations enable different functions. The specific structure and principle are as follows:

[0055] (1) Three-position four-way valve

[0056] This state valve is a three-position four-way valve: the equipment structure is as follows: Figure 1 、 Figure 4 、 Figure 7As shown, the first and second chambers 1 and 2 form the liquid inlet chambers, connected to port P; the first and second chambers 1 and 2 are connected in a continuous manner; the seventh and eighth chambers 7 and 8 form the liquid outlet chambers, connected to port T; and the seventh and eighth chambers 7 and 8 are connected in a continuous manner. The fourth and fifth chambers 4 and 5 are connected via a flow channel, and the fourth and fifth chambers 4 and 5 are connected to working port A; the third and sixth chambers 3 and 6 are connected via a flow channel, and the third and sixth chambers 3 and 6 are connected to working port B. Liquid enters from port P, fills the first and second chambers 1 and 2, and then enters each chamber after valve opening and closing. The ninth, tenth, eleventh, and twelfth chambers 17 and 18 are used as balance chambers to maintain pressure balance during actuation. The ninth and twelfth chambers 17 and 20 are connected to the first chamber 1, and the tenth and eleventh chambers 19 are connected to the second chamber 2.

[0057] Operating principle of three-position four-way valve:

[0058] When the valve is powered off, the swing arm is centered and in the neutral position, disconnecting all the working chambers of the valve. During operation, the motor starts, switching from the neutral position to the first working position. The first swing arm 21 swings rightward, pushing the first push rod 13 and the third push rod 15 outward. The first push rod 13 pushes the first valve core 9, and the third push rod 15 pushes the third valve core 11, thereby connecting the first chamber 1 with the fifth chamber 5 and the third chamber 3 with the seventh chamber 7. After the first chamber 1 is connected to the fifth chamber 5, the liquid flows from the first chamber 1 into the fifth chamber 5, then through the flow channel into the fourth chamber 4, thereby connecting to the working port A. Liquid is present at the valve working port A. At the same time, the third chamber 3 is connected to the seventh chamber 7, causing the working port B to be connected to the T port, and the liquid returns to the oil at the T port. At this time, the second push rod 14 and the fourth push rod 16 have no swing rod force, and the return spring pushes the second valve core 10 and the fourth valve core 12, thereby disconnecting the second chamber 2 and the sixth chamber 6 (P port and B port are disconnected), and the fourth chamber 4 and the eighth chamber 8 (A port and T port are disconnected). At this time, there is no liquid in the working port A.

[0059] When switched to the second working position, the first swing arm 21 swings leftward, pushing the second push rod 14 and the fourth push rod 16 outward. The second push rod 14 pushes the second valve core 10, and the fourth push rod 16 pushes the fourth valve core 12, thereby connecting the second chamber 2 with the sixth chamber 6 and the fourth chamber 4 with the eighth chamber 8. After the second chamber 2 and the sixth chamber 6 are connected, liquid flows from the second chamber 2 into the sixth chamber 6 and then through the flow channel into the third chamber 3, thereby connecting with working port B. Liquid is then present at working port B. Simultaneously, the fourth chamber 4 and the fifth chamber 5 are connected, connecting working port A with port T, and liquid is returned to oil at port T. At this point, the first push rod 13 and the third push rod 15 have no swing arm force. The return spring pushes the first valve core 9 and the third valve core 11, disconnecting the first chamber 1 from the fifth chamber 5 (port P and port A), and disconnecting the third chamber 3 from the seventh chamber 7 (port B and port T). Working port B is now empty of liquid.

[0060] By switching between the above two working positions, the reversing function of the valve can be achieved.

[0061] (2) Symmetrical three-way valve

[0062] This state valve is a symmetrical three-position three-way valve. The equipment structure is as follows Figure 2 、 Figure 5 、 Figure 8 As shown, the thirteenth chamber 31 is the liquid inlet chamber, connected to port P; the sixteenth chamber 34 is the liquid outlet chamber, connected to port T; the fifteenth chamber 33 is connected to the working port A. The fourteenth chamber 32 and the fifteenth chamber 33 are connected by a flow channel. Liquid enters from port P, fills the thirteenth chamber 31, and then enters the other chambers after the valve is opened and closed. The seventeenth chamber 39 and the eighteenth chamber 40 are balance chambers, used to maintain pressure balance during actuation. The seventeenth chamber 39 is connected to the thirteenth chamber 31, and the eighteenth chamber 40 is connected to the fourteenth chamber 32.

[0063] Symmetrical three-position three-way valve operating principle:

[0064] When the valve is powered off, the swing arm is centered, in the neutral position. During operation, when the motor is activated and the valve switches from the neutral position to the first operating position, the first swing arm 21 swings leftward, pushing the fifth push rod 37 outward. The fifth push rod 37 then pushes the fifth valve core 35 leftward, thereby connecting the thirteenth chamber 31 with the fifteenth chamber 33. After the thirteenth chamber 31 and the fifteenth chamber 33 are connected, liquid flows from the thirteenth chamber 31 into the fifteenth chamber 33, thereby connecting with the working port A. Liquid is present at the valve working port A.

[0065] When switched to the second working position, the first swing lever 21 swings rightward, pushing the sixth push rod 38 outward. The sixth push rod 38 pushes the sixth valve core 36 rightward, thereby connecting the fourteenth chamber 32 with the sixteenth chamber 34. After the fourteenth chamber 32 and the sixteenth chamber 34 are connected, the liquid flows from the fifteenth chamber 33 into the fourteenth chamber 32 and then into the sixteenth chamber 34, thereby connecting with the oil return port T and returning oil to the valve.

[0066] By switching the above two working positions, the opening and closing functions of the valve can be achieved.

[0067] (3) Horizontal three-position three-way valve

[0068] This state valve is a horizontal three-position three-way valve. The equipment structure is as follows Figure 3 、 Figure 6 、 Figure 9 As shown, the nineteenth chamber 41 is the liquid inlet chamber, connected to port P; the twenty-first chamber 46 is the liquid outlet chamber, connected to port T. The twentieth chamber 42 and the twenty-second chamber 47 are connected via a flow channel, and the two are connected to the working port A. Liquid enters from port P, fills the nineteenth chamber 41, and then enters each chamber after the valve is opened and closed. The twenty-third chamber 45 and the twenty-fourth chamber 50 are balance chambers, used to maintain pressure balance during actuation. The twenty-third chamber 45 is connected to the nineteenth chamber 41, and the twenty-fourth chamber 50 is connected to the twenty-first chamber 46.

[0069] Operating Principle of a Horizontal, Three-Position, Three-Way Valve: 1. When the valve is de-energized, the swing lever is centered in the neutral position. During operation, the motor starts, switching from the neutral position to the first operating position. The first swing lever 21 swings leftward, pushing the seventh push rod 44 outward. The seventh push rod 44 pushes the seventh valve core 43 rightward, thereby connecting the nineteenth chamber 41 with the twentieth chamber 42. Once the nineteenth and twentieth chambers 41 and 42 are connected, liquid flows from the nineteenth chamber 41 into the twentieth chamber 42, connecting it to working port A. Liquid is present at working port A of the valve.

[0070] When switched to the second working position, the first swing lever 21 swings rightward, pushing the eighth push rod 49 outward. The eighth push rod 49 pushes the eighth valve core 48 rightward, thereby connecting the 21st chamber 46 with the 22nd chamber 47. After the 21st chamber 46 and the 22nd chamber 47 are connected, the liquid flows from the 20th chamber 42 into the 22nd chamber 47 and then into the 21st chamber 46, thereby connecting with the oil return port T and returning oil to the valve.

[0071] By switching the above two working positions, the opening and closing functions of the valve can be achieved.

[0072] (4) Same-direction three-position four-way valve

[0073] This state valve is a three-position four-way valve with the same direction: the equipment structure is as follows: Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 As shown, the valve cores of the device are arranged in the same direction. The 25th and 26th chambers 55 and 56 are the liquid inlet chambers, connected to port P; the 25th and 26th chambers 55 and 56 are connected; the 31st and 32nd chambers 61 and 62 are the liquid outlet chambers, connected to port T; the 31st and 32nd chambers 61 and 62 are connected. The 28th and 29th chambers 58 and 59 are connected by a flow channel, and the 28th and 29th chambers 58 and 59 are connected to working port A; the 27th and 30th chambers 57 and 60 are connected by a flow channel, and the 27th and 30th chambers 60 are connected to working port B. Liquid enters from port P, fills the 25th and 26th chambers 55 and 56, and then enters each chamber after the valve opens and closes. The 33rd, 34th, 35th, 35th, and 36th chambers 71, 72, 73, and 74 are balance chambers, used to maintain pressure balance during actuation. The thirty-third chamber 71 and the thirty-sixth chamber 74 are connected to the twenty-fifth chamber 55 , and the thirty-fourth chamber 72 and the thirty-fifth chamber 73 are connected to the twenty-sixth chamber 56 .

[0074] Operating principle of the same-direction three-position four-way valve:

[0075] When the valve is powered off, the swing arm is centered, in the neutral position, disconnecting all working chambers. During operation, the motor starts, switching from the neutral position to the first working position. The first swing arm 21 swings rightward, pushing the ninth push rod 67 and the eleventh push rod 69 outward. The ninth push rod 67 moves the ninth valve core 63, and the eleventh push rod 69 moves the eleventh valve core 65, thereby connecting the twenty-fifth chamber 55 with the twenty-ninth chamber 59, and the twenty-seventh chamber 57 with the thirty-first chamber 61. After the twenty-fifth chamber 55 and the twenty-ninth chamber 59 are connected, liquid flows from the twenty-fifth chamber 55 into the twenty-ninth chamber 59, then through the flow channel into the twenty-eighth chamber 58, thereby connecting with the working port A. Liquid is present at the valve working port A. Simultaneously, the twenty-seventh chamber 57 and the thirty-first chamber 61 are connected, causing the working port B to connect with the T port, and the liquid returns to the oil at the T port. At this time, the tenth push rod 68 and the twelfth push rod 70 have no swing rod force, and the return spring pushes the tenth valve core 64 and the twelfth valve core 66, thereby disconnecting the twenty-sixth chamber 56 and the thirtieth chamber 60 (P port and B port are disconnected), and the twenty-eighth chamber 58 and the thirty-second chamber 62 are disconnected (A port and T port are disconnected). At this time, there is no liquid in the working port B.

[0076] When switched to the second working position, the first swing rod 21 swings leftward, pushing the tenth push rod 68 and the twelfth push rod 70 outward. The tenth push rod 68 pushes the tenth valve core 64, and the twelfth push rod 70 pushes the twelfth valve core 66, thereby connecting the twenty-sixth chamber 56 with the thirtieth chamber 60, and the twenty-eighth chamber 58 with the thirty-second chamber 62. After the twenty-sixth chamber 56 is connected to the thirtieth chamber 60, the liquid enters the thirtieth chamber 60 through the flow channel and enters the twenty-seventh chamber 57, thereby connecting to the working port B. Liquid is present at the valve working port B. At the same time, the twenty-eighth chamber 58 is connected to the twenty-ninth chamber 59, causing the working port A to be connected to the T port, and the liquid is discharged from the T port to return oil. At this time, the ninth push rod 67 and the eleventh push rod 69 have no swing rod force, and the return spring pushes the ninth valve core 63 and the eleventh valve core 65, thereby disconnecting the twenty-fifth chamber 55 and the twenty-ninth chamber 59 (P port and A port are disconnected), and the twenty-seventh chamber 57 and the thirty-first chamber 61 are disconnected (B port and T port are disconnected). At this time, there is no liquid in the working port A.

[0077] By switching between the above two working positions, the reversing function of the valve can be achieved.

[0078] Seat Valve Drive: Depending on the needs, this hydraulic valve drive can be adjusted to include motor-driven sideways, swing-rod drive, electromagnet drive, or motor-driven eccentric drive. Different drive modes achieve different control precisions and achieve different functions.

[0079] Motor side drive swing arm drive: see Figure 1-Figure 3 , Figure 10-13 It is a three-position four-way valve driven by a lateral motor.

[0080] When motor 22 is powered, it rotates, driving the ball screw nut to rotate. This rotation pushes the ball screw on the X-axis, causing it to contact first swing rod 21. Because the rotation center of first swing rod 21 is fixed to the valve, the movement of the ball screw drives the swing rod to swing left or right. Swing rod 21 contacts the first and third push rods 13 and 15, or the second and fourth push rods 14 and 16. When the swing rod swings, it drives the push rod on the valve to move, opening or closing the valve core, and the valve opens and closes normally.

[0081] Solenoid drive: see Figure 4-Figure 6 , Figure 14-17This is a three-position, four-way valve driven by an electromagnet. When the left electromagnet 24 is energized, the solenoid head retracts. The right electromagnet, acting in conjunction with the return spring 25, pushes the transmission rod 26 to the left on the X-axis. Transmission rod 26 contacts the second swing lever 23. Since the swing lever's rotation center is fixed to the valve, the swing lever contacts the push rod. When the swing lever swings, it drives the push rod on the valve to the left, opening or closing the valve core, and the valve opens and closes normally. When the right electromagnet is energized, the above steps are repeated to open or close the opposite valve core, achieving different valve functions.

[0082] Motor direct drive eccentric drive: see Figure 7-Figure 9 , Figures 18-21 , which is a three-position four-way valve - motor-driven eccentric wheel drive.

[0083] When the motor 29 is powered, the rotor rotates, driving the transmission shaft 28. The transmission shaft is provided with opposing eccentrics 30, which contact the ejector pins (two of them facing each other). Rotation of the transmission shaft drives the eccentrics 30, which in turn swing the third swinging rod 27, thereby driving the ejector pins on the valve to move relative to each other, causing the valve to open and close normally. This achieves the different functions of the valve.

[0084] The above embodiments are used to illustrate the present invention rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A double-layer hydraulic valve, characterized in that: The upper layer of the hydraulic valve is the drive module, and the lower layer is the valve body module; The valve body module includes a plurality of valve body units and a swing rod. The valve body units are arranged on the same side of the swing rod, or symmetrically arranged on both sides of the swing rod. A push rod is provided on the valve core of each valve body unit, and the push rods are in contact with the lower end of the swing rod. The driving module includes a driving unit and a transmission unit. The driving unit is connected to the upper end of the swing arm through the transmission unit to drive the swing arm to generate displacement in the horizontal direction.

2. A double-layer hydraulic valve according to claim 1, characterized in that: There are four valve body units, which are symmetrically arranged on both sides of the swing rod, and two valve body units on each side are arranged side by side up and down to form a three-position four-way valve.

3. A double-layer hydraulic valve according to claim 1, characterized in that: The valve body units are provided in pairs and are symmetrically arranged on both sides of the swing rod to form a symmetrical three-position three-way valve.

4. A double-layer hydraulic valve according to claim 1, characterized in that: There are two valve body units, which are arranged on the same side of the swing rod and arranged side by side up and down to form a horizontal three-position three-way valve.

5. A double-layer hydraulic valve according to claim 1, characterized in that: There are four valve body units, which are arranged on the same side of the swing rod and are arranged in two groups in the same direction, forming a same-direction three-position four-way valve.

6. A double-layer hydraulic valve according to claim 1, characterized in that: The driving module adopts a motor-driven side-drive swing arm driving method, specifically: the upper end of the swing arm is connected to the ball screw, the motor is connected to the ball screw nut, the motor drives the nut to rotate to push the ball screw to move on the X-axis, and the lower end of the swing arm contacts the top rod on the valve body module to open or close the valve core.

7. A double-layer hydraulic valve according to claim 1, characterized in that: The driving module adopts an electromagnet drive mode, specifically: the upper end of the swing arm is connected to the transmission rod, electromagnets are provided on both sides of the transmission rod, and a return spring is installed between the transmission rod and the electromagnetic head of the electromagnet; the electromagnets on the left and right sides are energized to drive the transmission rod to move on the X-axis, and the lower end of the swing arm contacts the top rod on the valve body module to open or close the valve core.

8. A double-layer hydraulic valve according to claim 1, characterized in that: The driving module adopts a motor-directed eccentric drive mode, specifically: the upper end of the swing arm is connected to the eccentric wheel, and the eccentric wheel is connected to the rotor of the motor through a transmission shaft. The rotation of the rotor can drive the transmission shaft to rotate, and the lower end of the swing arm contacts the top rod on the valve body module to open or close the valve core.

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