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

[0002] At present, the manufacturers of various three-position four-way valves on the market basically use a slide valve structure in which the valve core and the valve body slide relative to each other and the flow channel is formed by the grooves of the valve core and the valve body. In actual use, due to structural limitations, the sealing effect of the slide valve is not as good as that of the seat valve, there is oil leakage, and there are higher requirements for the viscosity of the liquid medium, etc., which is insufficient for application in complex working conditions and clean environments. To solve this problem, it is necessary to innovate and overcome the disadvantages to change the design scheme. Summary of the invention

[0003] The present invention aims to solve 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 driving module and the lower layer is a valve body module;

[0005] The valve body module comprises a plurality of valve body units and a swing rod, wherein the valve body units are arranged on the same side of the swing rod, or symmetrically arranged on both sides of the swing rod, and a push rod is arranged 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 comprises a driving unit and a transmission unit. The driving unit is connected to the upper end of the swing rod through the transmission unit to drive the swing rod 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, the valve body units are provided in two portions, which are symmetrically arranged on both sides of the swing rod to form a symmetrical three-position three-way valve.

[0009] Furthermore, the valve body units are provided in two pieces, 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, the driving module is a motor-laterally driven 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.

[0011] Furthermore, the driving module is driven by an electromagnet, specifically: the upper end of the swing rod 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 rod contacts the top rod on the valve body module to open or close the valve core.

[0012] Furthermore, the driving module is a motor-direct-driven eccentric wheel driving 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 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.

[0013] Beneficial effects of the present invention:

[0014] (1) The double-layer structure is adopted to integrate four sets of seat valves into a set of double-layer hydraulic valves. The valve has a compact structure, small size, large flow rate, and can use water and other media with low viscosity. At the same time, the seat valve has a better sealing effect than the slide valve, has lower requirements on the use environment and temperature, is suitable for more working conditions, and can meet the needs of different occasions and working conditions.

[0015] (2) The driving part and the valve body are separated, and the liquid medium will not affect the driving part during operation.

[0016] (3) The drive is independent of the operation of the valve body, 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 )、Electromagnet drive( Figure 4-Figure 6 ) and motor direct drive eccentric wheel drive ( Figure 7-Figure 9 ).

[0017] (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 ) and horizontal three-way valve ( Figure 3 , Figure 6 , Fig. 9 ).

[0018] (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. And the control is symmetrical during control, reducing the control requirements.

[0019] (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. 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

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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.

[0021] Figure 1 Schematic diagram of a three-position four-way valve driven by a lateral motor;

[0022] Figure 2 Schematic diagram of a symmetrical three-position three-way valve driven by a lateral motor;

[0023] Figure 3 It is a schematic diagram of a horizontally mounted three-position three-way valve driven by a lateral motor;

[0024] Figure 4 Schematic diagram of a three-position four-way valve driven by an electromagnet;

[0025] Figure 5 It is a schematic diagram of a symmetrical three-position three-way valve driven by an electromagnet;

[0026] Figure 6 It is a schematic diagram of a horizontally mounted three-position three-way valve driven by an electromagnet;

[0027] Figure 7 This is a schematic diagram of a three-position four-way valve driven by an electric motor directly driving an eccentric wheel;

[0028] Figure 8 It is a schematic diagram of a symmetrical three-position three-way valve driven by an electric motor directly driving an eccentric wheel;

[0029] Fig. 9 This is a schematic diagram of a horizontally mounted three-position, three-way valve driven directly by an electric motor and an eccentric wheel. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific implementation examples described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] like Figure 1-Figure 9 As shown, the present invention provides a double-layer hydraulic valve, the upper layer is a driving module, and the lower layer is a valve body module;

[0032] The valve body module is integrated, comprising a plurality of valve body units and a swing rod, a push rod is arranged on the valve core of each valve body unit, and the push rods are in contact with the swing rod;

[0033] 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, and two valve body units on each side are arranged side by side up and down to form a three-position four-way valve;

[0034] 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;

[0035] 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-position three-way valve;

[0036] The drive module includes three drive modes: motor side-drive swing rod drive, electromagnet drive or motor direct-drive eccentric wheel drive;

[0037] The motor side-drive swing lever driving is specifically 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;

[0038] The electromagnet drive is specifically as follows: the upper end of the swing rod is connected to the transmission rod, electromagnets are arranged 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 rod contacts the top rod on the valve body module to open or close the valve core of the valve body module;

[0039] 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 push rod on the valve body module to open or close the valve core of the valve body module.

[0040] The valve body of the present invention integrates multiple sets of common seat valves into one structure. At the same time, according to different needs and application scenarios, the hydraulic valve can be adjusted to a three-position four-way valve, a symmetrical three-position three-way valve and a horizontal three-position three-way valve. Different valve forms can achieve different functions. The specific structure and principle are as follows:

[0041] (1) Three-position four-way valve

[0042] 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 chamber 1 and the second chamber 2 are liquid inlet chambers, connected to the P port; the first chamber 1 and the second chamber 2 are connected; the seventh chamber 7 and the eighth chamber 8 are liquid outlet chambers, connected to the T port; the seventh chamber 7 and the eighth chamber 8 are connected. The fourth chamber 4 and the fifth chamber 5 are connected through the flow channel, and the fourth chamber 4 and the fifth chamber 5 are connected to the working port A port; the third chamber 3 and the sixth chamber 6 are connected through the flow channel, and the third chamber 3 and the sixth chamber 6 are connected to the working port B port. The liquid enters from the P port, fills the first chamber 1 and the second chamber 2, and enters each chamber after the valve switch. The ninth chamber 17, the tenth chamber 18, the eleventh chamber 19, and the twelfth chamber 20 are balance chambers, which are used to maintain pressure balance during driving. Among them, 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.

[0043] Operating principle of three-position four-way valve:

[0044] When the valve is powered off, the swing rod is centered and in the middle position, and the working chambers of the valve are disconnected. When working, the motor starts, and when switching from the middle 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 to move outward, 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, so that the first chamber 1 is connected with the fifth chamber 5, and the third chamber 3 is connected with the seventh chamber 7. After the first chamber 1 is connected with the fifth chamber 5, the liquid enters the fifth chamber 5 from the first chamber 1, and then enters the fourth chamber 4 through the flow channel, thereby connecting with the working port A, and there is liquid at the valve working port A; at the same time, the third chamber 3 and the seventh chamber 7 are connected, so that the working port B is connected with 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.

[0045] When switched 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, so that the second chamber 2 is connected with the sixth chamber 6, and the fourth chamber 4 is connected with the eighth chamber 8. After the second chamber 2 is connected with the sixth chamber 6, the liquid enters the sixth chamber 6 from the second chamber 2, and then enters the third chamber 3 through the flow channel, so as to be connected with the working port B, and there is liquid in the valve working port B; at the same time, the fourth chamber 4 and the fifth chamber 5 are connected, so that the working port A is connected with the T port, and the liquid returns to the oil at the T port. At this time, the first push rod 13 and the third push rod 15 have no swing rod force, and the reset spring pushes the first valve core 9 and the third valve core 11, so as to disconnect 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 are disconnected (the B port and the T port are disconnected), and there is no liquid in the working port B.

[0046] By switching the above two working positions, the reversing function of the valve can be achieved.

[0047] (2) Symmetrical three-way valve

[0048] 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 a liquid inlet chamber connected to the P port; the sixteenth chamber 34 is a liquid outlet chamber connected to the T port; the fifteenth chamber 33 is connected to the working port A port, and the fourteenth chamber 32 and the fifteenth chamber 33 are connected through the flow channel. The liquid enters from the P port, fills the thirteenth chamber 31, and enters each chamber after the valve is switched. The seventeenth chamber 39 and the eighteenth chamber 40 are balance chambers, which are used to maintain pressure balance during driving. Among them, the seventeenth chamber 39 is connected to the thirteenth chamber 31, and the eighteenth chamber 40 is connected to the fourteenth chamber 32.

[0049] Symmetrical three-position three-way valve operating principle:

[0050] When the valve is powered off, the swing rod is centered and in the middle position. When the valve is working, the motor is started, and when the valve is switched from the middle position to the first working position, the first swing rod 21 swings to the left, pushing the fifth push rod 37 to move outward, and the fifth push rod 37 pushes the fifth valve core 35 to move to the left, thereby connecting the thirteenth chamber 31 with the fifteenth chamber 33. After the thirteenth chamber 31 is connected with the fifteenth chamber 33, the liquid enters the fifteenth chamber 33 from the thirteenth chamber 31, thereby connecting with the working port A, and there is liquid at the valve working port A.

[0051] When switched to the second working position, the first swing rod 21 swings rightward, pushing the sixth push rod 38 to move outward, and the sixth push rod 38 pushes the sixth valve core 36 to move rightward, so that the fourteenth chamber 32 is connected with the sixteenth chamber 34. After the fourteenth chamber 32 is connected with the sixteenth chamber 34, the liquid enters the fourteenth chamber 32 from the fifteenth chamber 33 and then enters the sixteenth chamber 34, thereby connecting with the oil return port T, and the valve returns oil.

[0052] By switching the above two working positions, the opening and closing functions of the valve can be achieved.

[0053] (3) Horizontal three-position three-way valve

[0054] This state valve is a horizontal three-position three-way valve. The equipment structure is as follows Figure 3 , Figure 6 , Fig. 9 As shown, the seventeenth chamber 41 is a liquid inlet chamber connected to the P port; the nineteenth chamber 46 is a liquid outlet chamber connected to the T port. The eighteenth chamber 42 is connected to the twentieth chamber 47 through the flow channel, and the eighteenth chamber 42 and the twentieth chamber 47 are connected to the working port A port. The liquid enters from the P port, fills the seventeenth chamber 41, and enters each chamber after the valve switch. The twenty-first chamber 45 and the twenty-second chamber 50 are balance chambers, which are used to maintain pressure balance during driving. Among them, the twenty-first chamber 45 is connected to the seventeenth chamber 41, and the twenty-second chamber 50 is connected to the nineteenth chamber 46.

[0055] The operating principle of the horizontal three-position three-way valve: 1. When the valve is powered off, the swing rod is centered and in the middle position. When working, the motor starts, and when switching from the middle position to the first working position, the first swing rod 21 swings to the left, pushing the seventh push rod 44 to move outward, and the seventh push rod 44 pushes the seventh valve core 43 to move to the right, so that the seventeenth chamber 41 is connected with the eighteenth chamber 42. After the seventeenth chamber 41 is connected with the eighteenth chamber 42, the liquid enters the eighteenth chamber 42 from the seventeenth chamber 41, thereby connecting with the working port A, and there is liquid at the valve working port A.

[0056] When switched to the second working position, the first swing rod 21 swings rightward, pushing the eighth push rod 49 to move outward, and the eighth push rod 49 pushes the eighth valve core 48 to move rightward, so that the nineteenth chamber 46 is connected with the twentieth chamber 47. After the nineteenth chamber 46 is connected with the twentieth chamber 47, the liquid enters the twentieth chamber 47 from the eighteenth chamber 42 and then enters the nineteenth chamber 46, thereby connecting with the oil return port T, and the valve returns oil.

[0057] By switching the above two working positions, the opening and closing functions of the valve can be achieved.

[0058] Seat valve drive: According to different requirements, the hydraulic valve drive can be adjusted to motor side drive swing rod drive, electromagnet drive, motor direct drive eccentric wheel drive. Different drive modes can achieve different control accuracy and achieve different functions.

[0059] Motor side drive swing arm drive: see Figure 1-Figure 3 , which is a three-position four-way valve - side motor driven.

[0060] When the motor 22 is powered on, the motor rotates, driving the ball screw nut to rotate. The rotation of the nut can push the ball screw to move on the X axis. The ball screw contacts the first swing rod 21. Since the rotation center of the first swing rod 21 is fixed on the valve, the ball screw drives the swing rod to swing left or right when it moves. The swing rod 21 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, open or close the valve core, and the valve opens and closes normally.

[0061] Solenoid drive: See Figure 4-Figure 6 , which is a three-position four-way valve driven by an electromagnet. When the electromagnet 24 on the left is energized, the electromagnetic head is retracted, and the electromagnet on the right and the reset spring 25 can push the transmission rod 26 to move leftward on the X-axis, and the transmission rod 26 contacts the second swing rod 23. Since the swing rod's rotation center is fixed on the valve, the swing rod contacts the push rod. When the swing rod swings, the push rod on the valve is driven to move leftward, opening or closing the valve core, and the valve opens and closes normally. When the electromagnet on the right is energized, the above steps are repeated to open or close the opposite valve core to achieve different functions of the valve.

[0062] Direct motor drive eccentric wheel drive: see Figure 7-Figure 9 , which is a three-position four-way valve-motor direct-driven eccentric wheel drive.

[0063] When the motor 29 is powered, the rotor rotates to drive the transmission shaft 28 to rotate. The transmission shaft is provided with relative eccentric wheels 30, which are in contact with the ejector pins (two of them are opposite to each other). When the transmission shaft rotates, the eccentric wheels 30 are driven to rotate. The rotation of the eccentric wheels drives the third swing rod 27 to swing, thereby driving the ejector pins on the valve to move relative to each other, and the valve opens and closes normally. In this way, different functions of the valve are realized.

[0064] The above embodiments are used to illustrate the present invention rather than to limit the present invention. Any modification and change 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 a drive module, and the lower layer is a valve body module; The valve body module comprises a plurality of valve body units and a swing rod, wherein the valve body units are arranged on the same side of the swing rod, or symmetrically arranged on both sides of the swing rod, and a push rod is arranged 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 comprises a driving unit and a transmission unit. The driving unit is connected to the upper end of the swing rod through the transmission unit to drive the swing rod 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 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.

4. A double-layer hydraulic valve according to claim 1, characterized in that: The valve body units are 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-position three-way valve.

5. A double-layer hydraulic valve according to claim 1, characterized in that: The driving module adopts a motor-laterally 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.

6. A double-layer hydraulic valve according to claim 1, characterized in that: The driving module is driven by an electromagnet, specifically: the upper end of the swing rod is connected to the transmission rod, electromagnets are arranged 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 rod 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 a motor-direct-driven eccentric wheel driving method, specifically: 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 a 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.

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