Double-layer hydraulic valve

Abstract

A double-layer hydraulic valve. An upper layer of the double-layer hydraulic valve is a drive module, and a lower layer of the double-layer 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 a same side of the swing rod, or are symmetrically arranged on two sides of the swing rod. A push rod is arranged on a valve spool of each valve body unit, and each push rod is in contact with a lower end of the swing rod. The drive module comprises a drive unit and a transmission unit. The drive unit is connected to an upper end of the swing rod via the transmission unit, and drives the swing rod to generate displacement in a horizontal direction. When a motor or an electromagnet drives the swing rod to swing, the push rods are driven to move, and movement of the push rods in turn drives the valve spools to move, thereby achieving opening or closing of the valve spools. Different combinations enable the valve to realize different functions. By overlapping and stacking multiple chambers, the overall volume of the valve is effectively reduced.

Description

A double-layer hydraulic valve Technical Field

[0001] This invention relates to the field of seat valves, and more particularly to a double-layer hydraulic valve. Background Technology

[0002] Currently, most manufacturers of three-way four-way valves on the market use a spool valve structure where the valve core and body slide relative to each other, relying on grooves in the valve core and body to form a flow channel. In practical use, due to structural limitations, the sealing effect of spool valves is not as good as that of seat valves, resulting in oil leakage. Furthermore, they have higher requirements for the viscosity of the liquid medium, making them insufficient for applications in complex working conditions and clean environments. To solve this problem, innovation is needed to overcome these drawbacks and change the design scheme. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a double-layer hydraulic valve.

[0004] The objective of this invention is achieved through the following technical solution: a double-layer hydraulic valve, wherein the upper layer of the hydraulic valve is a drive module and the lower layer is a valve body module;

[0005] The valve body module includes multiple 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. Each valve body unit has a push rod on its valve core, and the push rods are all in contact with the lower end of the swing rod.

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

[0007] Furthermore, the valve body unit has four units, symmetrically arranged on both sides of the swing arm, with two valve body units on each side arranged side by side, forming a three-position four-way valve.

[0008] Furthermore, the valve body unit has two units, symmetrically arranged on both sides of the swing rod, forming a symmetrical three-way valve.

[0009] Furthermore, the valve body unit has two units, which are arranged on the same side of the swing arm, side by side, forming a horizontal three-way valve.

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

[0011] Furthermore, the drive module is a motor-driven swing arm drive 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, which can 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 drive module is driven by an electromagnet, specifically: the upper end of the swing rod is connected to the transmission rod, and electromagnets are provided on both sides of the transmission rod. A return spring is installed between the transmission rod and the electromagnetic head of the electromagnet; when the electromagnets on the left and right sides are energized, the transmission rod is driven to move on the X-axis, and the lower end of the swing rod contacts the top rod on the valve body module to open or close the valve core.

[0013] Furthermore, the drive module is a direct-drive eccentric wheel drive method, 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 the 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] The beneficial effects of this invention are:

[0015] (1) Adopting a double-layer structure, four sets of seat valves are integrated into one double-layer hydraulic valve. The valve structure is compact, small in size, and has a large flow rate. It can use 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. It can meet the needs of different occasions and working conditions.

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

[0017] (3) The drive is independent of the valve body operation, which makes the drive mode diversified and the valve drive mode can be adjusted according to different needs. It can be divided into side motor drive (Figure 1-Figure 3, Figure 10-Figure 13), electromagnet drive (Figure 4-Figure 6, Figure 14-Figure 17) and motor direct drive eccentric wheel drive (Figure 7-Figure 9, Figure 18-Figure 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), a symmetrical three-position three-way valve (Figure 2, Figure 5, Figure 8), a horizontal three-position three-way valve (Figure 3, Figure 6, Figure 9), and a unidirectional three-position four-way valve (Figure 10-Figure 21).

[0019] (5) The valve body of the three-position four-way valve uses two valve cores symmetrically in pairs, which is a force-balanced structure and allows for a large pressure difference. Moreover, the control is symmetrical, reducing the control requirements.

[0020] (6) The valve body of the three-position three-way valve is independent of each valve core and the control mode is independent of each other. The valve core is controlled separately and the opening and closing of each valve core will not interfere with the opening and closing of other valve cores, reducing control requirements and the possibility of leakage. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 is a schematic diagram of a three-position four-way valve driven by a side motor;

[0023] Figure 2 is a schematic diagram of a symmetrical three-way valve driven by a side motor;

[0024] Figure 3 is a schematic diagram of a horizontal three-way valve driven by a side motor;

[0025] Figure 4 is a schematic diagram of a three-position four-way valve driven by an electromagnet.

[0026] Figure 5 is a schematic diagram of a symmetrical three-way valve driven by an electromagnet.

[0027] Figure 6 is a schematic diagram of a horizontal three-way valve driven by an electromagnet.

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

[0029] Figure 8 is a schematic diagram of a symmetrical three-way valve driven by a motor-driven eccentric wheel.

[0030] Figure 9 is a schematic diagram of a three-way valve with a horizontal orientation driven by a motor-driven eccentric wheel.

[0031] Figure 10 is a schematic diagram of the valve core position of a side-driven, three-position four-way valve.

[0032] Figure 11 is a cross-sectional view of the right valve core of a side-driven, three-position four-way valve.

[0033] Figure 12 is a schematic diagram of the cross-sectional position of the left valve core of a side-driven, three-position four-way valve.

[0034] Figure 13 is a cross-sectional view of the left valve core of a side-driven, three-position four-way valve.

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

[0036] Figure 15 is a cross-sectional view of the right valve core of a co-directional three-way four-way valve driven by an electromagnet.

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

[0038] Figure 17 is a cross-sectional schematic diagram of the left valve core of a co-directional three-way four-way valve driven by an electromagnet.

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

[0040] Figure 19 is a cross-sectional view of the right valve core of a three-position four-way valve driven by a motor-driven eccentric wheel.

[0041] Figure 20 is a schematic diagram of the cross-sectional position of the left valve core of a three-position four-way valve driven by a motor and an eccentric wheel.

[0042] Figure 21 is a cross-sectional view of the left valve core of a three-position four-way valve driven by a motor and an eccentric wheel. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are merely illustrative and not intended to limit the invention.

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

[0045] The valve body module is integrated, comprising multiple valve body units and a swing rod. Each valve body unit has a push rod on its valve core, and the push rods are all in contact with the swing rod.

[0046] In the first embodiment of the present invention, four valve body units are provided, symmetrically arranged on both sides of the swing arm, with two valve body units on each side arranged vertically side by side to form a three-position four-way valve;

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

[0048] The third embodiment of the present invention provides two valve body units, which are arranged on the same side of the swing arm, and are arranged side by side, forming a horizontal three-position three-way valve;

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

[0050] The drive module includes three drive methods: motor-driven lateral swing arm drive, electromagnet drive, or motor-driven eccentric wheel drive.

[0051] The motor-driven lateral swing arm is specifically driven as follows: 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, which can 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 of the valve body module.

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

[0053] The motor direct drive eccentric wheel drive is specifically 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 ordinary seat valves into a single structure. Furthermore, depending on the requirements and application scenarios, this hydraulic valve can be adjusted to form a three-position four-way valve, a symmetrical three-position three-way valve, a horizontally positioned three-position three-way valve, and a unidirectional three-position four-way valve. Different valve configurations achieve 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 shown in Figures 1, 4, and 7. The first chamber 1 and the second chamber 2 are the inlet chambers, connected to port P; the first chamber 1 and the second chamber 2 are always connected. The seventh chamber 7 and the eighth chamber 8 are the outlet chambers, connected to port T; the seventh chamber 7 and the eighth chamber 8 are always connected. The fourth chamber 4 and the fifth chamber 5 are connected via a flow channel, and the fourth chamber 4 and the fifth chamber 5 are connected to the working port A. The third chamber 3 and the sixth chamber 6 are connected via a flow channel, and the third chamber 3 and the sixth chamber 6 are connected to the working port B. Liquid enters through port P, filling the first chamber 1 and the second chamber 2, and then enters each chamber after the valve is switched on and off. The ninth chamber 17, the tenth chamber 18, the eleventh chamber 19, and the twelfth chamber 20 are balance chambers used to maintain pressure balance during operation. The ninth chamber 17 and the twelfth chamber 20 are connected to the first chamber 1, and the tenth chamber 18 and the eleventh chamber 19 are connected to the second chamber 2.

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

[0058] When the valve is de-energized, the swing rod is centered in the neutral position, and all working chambers of the valve are disconnected. During operation, the motor starts, and when switching from the neutral position to the first working position, the first swing rod 21 swings to the right, pushing the first push rod 13 and the third push rod 15 outwards. The first push rod 13 pushes the first valve core 9 to move, and the third push rod 15 pushes the third valve core 11 to move, 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 and the fifth chamber 5 are connected, liquid enters the fifth chamber 5 from the first chamber 1, then flows through the flow channel into the fourth chamber 4, thus connecting with working port A, where liquid is present. Simultaneously, the third chamber 3 and the seventh chamber 7 are connected, causing working port B to connect with port T, and liquid exits through port T for oil return. At this time, the second push rod 14 and the fourth push rod 16 have no swing rod force, and the reset 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 disconnect), and the fourth chamber 4 and the eighth chamber 8 (A port and T port disconnect). At this time, there is no liquid at the working port A.

[0059] When switching to the second working position, the first swing rod 21 swings to the left, pushing the second push rod 14 and the fourth push rod 16 to move outward. The second push rod 14 pushes the second valve core 10, and the fourth push rod 16 pushes the fourth valve core 12 to move, 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, the liquid enters the sixth chamber 6 from the second chamber 2, and then enters the third chamber 3 through the flow channel, thus connecting with the working port B, and there is liquid at the working port B. At the same time, the fourth chamber 4 and the fifth chamber 5 are connected, causing the working port A to connect with the T port, and the liquid exits the T port to return oil. At this time, the first push rod 13 and the third push rod 15 have no swing rod force, and the return spring pushes the first valve core 9 and the third valve core 11, thereby disconnecting the first chamber 1 and the fifth chamber 5 (the P port and the A port are disconnected), and the third chamber 3 and the seventh chamber 7 (the B port and the T port are disconnected), and there is no liquid at the working port B.

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

[0061] (2) Symmetrical three-way valve

[0062] This state valve is a symmetrical three-position three-way valve. The device structure is shown in Figures 2, 5, and 8. The thirteenth chamber 31 is the inlet chamber, connected to port P; the sixteenth chamber 34 is the outlet chamber, connected to port T; the fifteenth chamber 33 is connected to the working port A; and the fourteenth chamber 32 and the fifteenth chamber 33 are continuously connected via a flow channel. Liquid enters through port P, filling the thirteenth chamber 31, and then flows into each chamber after the valve is opened and closed. The seventeenth chamber 39 and the eighteenth chamber 40 are balancing chambers used to maintain pressure balance during operation. The seventeenth chamber 39 is connected to the thirteenth chamber 31, and the eighteenth chamber 40 is connected to the fourteenth chamber 32.

[0063] Operating principle of symmetrical three-way valve:

[0064] When the valve is de-energized, the swing rod is centered in the neutral position. During operation, the motor starts, and when switching from the neutral position to the first working position, the first swing rod 21 swings to the left, pushing the fifth push rod 37 to move outward. The fifth push rod 37 pushes the fifth valve core 35 to move to the left, thereby connecting the thirteenth chamber 31 and the fifteenth chamber 33. After the thirteenth chamber 31 and the fifteenth chamber 33 are connected, liquid enters the fifteenth chamber 33 from the thirteenth chamber 31, thus connecting with the working port A, and there is liquid at the valve's working port A.

[0065] When switching to the second working position, the first swing rod 21 swings to the right, pushing the sixth push rod 38 to move outward. The sixth push rod 38 pushes the sixth valve core 36 to move to the right, thereby connecting the fourteenth chamber 32 and the sixteenth chamber 34. After the fourteenth chamber 32 and the sixteenth chamber 34 are connected, the liquid enters the fourteenth chamber 32 from the fifteenth chamber 33 and then enters the sixteenth chamber 34, thus connecting with the return port T, and the valve returns oil.

[0066] By switching between the two working positions, the valve can be opened and closed.

[0067] (3) Horizontal three-way valve

[0068] This state valve is a horizontally positioned three-position three-way valve. The device structure is shown in Figures 3, 6, and 9. The nineteenth chamber 41 is the inlet chamber, connected to port P; the twenty-first chamber 46 is the outlet chamber, connected to port T. The twentieth chamber 42 and the twenty-second chamber 47 are connected via a flow channel and are connected to the working port A. Liquid enters through port P, filling the nineteenth chamber 41, and then flows into each chamber after the valve is switched on and off. The twenty-third chamber 45 and the twenty-fourth chamber 50 are balancing chambers used to maintain pressure balance during operation. 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-way valve: 1. When the valve is de-energized, the swing rod is centered in the neutral position. During operation, the motor starts, and when switching from the neutral position to the first working position, the first swing rod 21 swings to the left, pushing the seventh push rod 44 to move outward. The seventh push rod 44 pushes the seventh valve core 43 to move to the right, thereby connecting the nineteenth chamber 41 with the twentieth chamber 42. After the nineteenth chamber 41 and the twentieth chamber 42 are connected, liquid enters the twentieth chamber 42 from the nineteenth chamber 41, thus connecting with the working port A, and there is liquid at the valve's working port A.

[0070] When switching to the second working position, the first swing rod 21 swings to the right, pushing the eighth push rod 49 to move outward. The eighth push rod 49 pushes the eighth valve core 48 to move to the right, thereby connecting the twenty-first chamber 46 and the twenty-second chamber 47. After the twenty-first chamber 46 and the twenty-second chamber 47 are connected, liquid enters the twenty-second chamber 47 from the twenty-third chamber 42 and then enters the twenty-first chamber 46, thus connecting with the return port T, and the valve returns oil.

[0071] By switching between the two working positions, the valve can be opened and closed.

[0072] (4) Co-directional three-position four-way valve

[0073] This state valve is a unidirectional three-position four-way valve: the equipment structure is shown in Figures 10, 11, 12, and 13. The four valve cores are arranged in the same direction. The 25th chamber 55 and the 26th chamber 56 are the inlet chambers, connected to port P; the 25th chamber 55 and the 26th chamber 56 are always connected. The 31st chamber 61 and the 32nd chamber 62 are the outlet chambers, connected to port T; the 31st chamber 61 and the 32nd chamber 62 are always connected. The 28th chamber 58 and the 29th chamber 59 are connected via a flow channel, and are connected to working port A. The 27th chamber 57 and the 30th chamber 60 are connected via a flow channel, and are connected to working port B. Liquid enters through port P, filling the 25th chamber 55 and the 26th chamber 56, and then flows into each chamber after the valve is opened and closed. Chambers 71 (33rd), 72 (34th), 73 (35th), and 74 (36th) are balancing chambers used to maintain pressure balance during operation. Chambers 71 (33rd) and 74 (36th) are connected to chamber 55 (25th), and chambers 72 (34th) and 73 (35th) are connected to chamber 56 (26th).

[0074] Operating principle of a unidirectional three-position four-way valve:

[0075] When the valve is de-energized, the swing rod is centered in the neutral position, and all working chambers of the valve are disconnected. During operation, the motor starts, and when switching from the neutral position to the first working position, the first swing rod 21 swings to the right, pushing the ninth push rod 67 and the eleventh push rod 69 to move outwards. The ninth push rod 67 pushes the ninth valve core 63 to move, and the eleventh push rod 69 pushes the eleventh valve core 65 to move, 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 enters the twenty-ninth chamber 59 from the twenty-fifth chamber 55, then flows through the flow channel into the twenty-eighth chamber 58, thus connecting with working port A, where liquid is present. Simultaneously, the twenty-seventh chamber 57 and the thirty-first chamber 61 are connected, causing working port B to connect with port T, and liquid exits through port T for oil return. At this time, the tenth push rod 68 and the twelfth push rod 70 have no swinging force. The reset 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 disconnecting the twenty-eighth chamber 58 and the thirty-second chamber 62 (A port and T port are disconnected). At this time, there is no liquid at the working port B.

[0076] When switching to the second working position, the first swing rod 21 swings to the left, pushing the tenth push rod 68 and the twelfth push rod 70 to move outward. The tenth push rod 68 pushes the tenth valve core 64 and the twelfth push rod 70 push the twelfth valve core 66 to move, 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 and the thirtieth chamber 60 are connected, the liquid enters the thirtieth chamber 60 from the twenty-sixth chamber 56, and then enters the twenty-seventh chamber 57 through the flow channel, thereby connecting with the working port B, and there is liquid at the valve working port B; at the same time, the twenty-eighth chamber 58 and the twenty-ninth chamber 59 are connected, causing the working port A to connect with the T port, and the liquid exits the T port to return oil. At this time, the ninth push rod 67 and the eleventh push rod 69 have no swinging force, and the reset 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 disconnecting the twenty-seventh chamber 57 and the thirty-first chamber 61 (B port and T port are disconnected). At this time, there is no liquid at the working port A.

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

[0078] Seat valve drive: Depending on the requirements, the hydraulic valve drive can be adjusted to include motor-driven lateral swing arm drive, electromagnet drive, or motor-driven eccentric wheel drive. Different drive methods achieve different control accuracies and realize different functions.

[0079] Lateral motor-driven swing arm drive: Refer to Figures 1-3. Figures 10-13 show a three-position four-way valve driven by a lateral motor.

[0080] When motor 22 is energized, it rotates, causing the ball screw nut to rotate. The rotation of the nut pushes the ball screw to move along the X-axis, bringing it into contact with the first swing rod 21. Since the rotation center of the first swing rod 21 is fixed on the valve, the movement of the ball screw causes the swing rod to swing left or right. The swing rod 21 then contacts the first push rod 13 and the third push rod 15, or the second push rod 14 and the fourth push rod 16. When the swing rod swings, it drives the push rod on the valve to move, opening or closing the valve core, allowing the valve to open and close normally.

[0081] Electromagnet drive: Refer to Figures 4-6 and 14-17 for a three-position four-way valve driven by an electromagnet. When the left electromagnet 24 is energized, the solenoid head retracts. Under the action of the right electromagnet and the return spring 25, the transmission rod 26 is pushed to the left along the X-axis. The transmission rod 26 contacts the second swing rod 23. Since the rotation center of the swing rod is fixed on the valve, the swing rod contacts the push rod. When the swing rod swings, it drives the push rod on the valve to move to the left, opening or closing the valve core, allowing the valve to open and close normally. When the right electromagnet is energized, the above steps are repeated to open or close the opposite valve core, realizing different functions of the valve.

[0082] Direct-drive eccentric wheel drive: Refer to Figures 7-9 and 18-21, which are three-position four-way valves with direct-drive eccentric wheel drive.

[0083] When motor 29 is energized, the rotor's rotation drives the transmission shaft 28 to rotate. The transmission shaft has opposing eccentric wheels 30, which contact the push rods (pairs opposite each other). When the transmission shaft rotates, it drives the eccentric wheels 30 to rotate, which in turn drives the third swing rod 27 to swing, thereby causing the push pins on the valve to move relative to each other, allowing the valve to open and close normally. This achieves the different functions of the valve.

[0084] The above embodiments are used to explain and illustrate the present invention, but not to limit the present invention. Any modifications and changes made to the present invention within the spirit and 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 this hydraulic valve is the drive module, and the lower layer is the valve body module; The valve body module includes multiple 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. Each valve body unit has a push rod on its valve core, and the push rods are all in contact with the lower end of the swing rod. The drive module includes a drive unit and a transmission unit. The drive unit is connected to the upper end of the swing arm through the transmission unit, and drives the swing arm to generate displacement in the horizontal direction.

2. A double-layer hydraulic valve according to claim 1, characterized in that, The valve body unit has four units, which are symmetrically arranged on both sides of the swing arm. Two valve body units on each side are arranged side by side, forming a three-position four-way valve.

3. A double-layer hydraulic valve according to claim 1, characterized in that, The valve body unit has two units, which are symmetrically arranged on both sides of the swing arm to form a symmetrical three-way valve.

4. A double-layer hydraulic valve according to claim 1, characterized in that, The valve body unit consists of two units, which are located on the same side of the swing arm and arranged side by side, forming a horizontal three-way valve.

5. A double-layer hydraulic valve according to claim 1, characterized in that, The valve body unit has four units, which are arranged on the same side of the swing arm in two groups, one above the other, in the same direction, forming a three-position four-way valve in the same direction.

6. A double-layer hydraulic valve according to claim 1, characterized in that, The drive module is a motor-driven swing arm drive method. Specifically, the upper end of the swing arm is connected to a ball screw, the motor is connected to the ball screw nut, and the motor drives the nut to rotate, which can push the ball screw to move on the X-axis. 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 drive module is driven by an electromagnet. Specifically, the upper end of the swing rod is connected to the transmission rod, and electromagnets are installed on both sides of the transmission rod. A return spring is installed between the transmission rod and the electromagnetic head of the electromagnet. When the electromagnets on the left and right sides are energized, the transmission rod is driven to move on the X-axis. The lower end of the swing rod 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 drive module is a direct-drive eccentric wheel drive, 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 the 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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