Multifunctional integrated manifold block hydraulic circuit

Abstract

The utility model relates to the technical field of electro-hydraulic actuating mechanisms, and provides a multifunctional integrated manifold block hydraulic circuit which comprises a first function module, a filter module, a special valve control module, an integrated manifold block and an oil tank. The filter module transmits system pressure oil to the first function module through the second one-way valve, and the first function module transmits the system pressure oil to the special valve control module. The special valve control module returns system pressure oil to an oil tank through the first functional module; the first function module is installed on the outer surface of the integrated oil path block to form a transmission oil path. Various control functions of the integrated manifold block do not interfere with one another during use and are independently executed, and the application occasions of the integrated manifold block are greatly expanded.

Description

Technical Field

[0001] This utility model relates to the field of electro-hydraulic actuator technology, and in particular to a multifunctional integrated oil circuit block hydraulic circuit. Background Technology

[0002] Electro-hydraulic actuators are widely used in industries such as petrochemicals, coal chemicals, power, metallurgy, water conservancy, and aerospace due to their high adjustment accuracy, large output force (torque), rapid response, stable operation, no hysteresis, and no oscillation. Especially in the refining and chemical industries, almost all special valves are controlled electro-hydraulically. In recent years, with the rise of a series of new chemical processes such as propane dehydrogenation, propane to propylene, and methanol washing, the demand for electro-hydraulic actuators in the refining and chemical sectors has become even stronger.

[0003] Considering the unique nature of production processes, electro-hydraulic actuators used in oil refining and chemical industries must first be suitable for outdoor installation and meet explosion-proof and waterproof requirements. Secondly, they must possess high stability, good reliability, rich functionality, and long service life. This results in relatively complex structures, with special valves such as butterfly valves and slide valves typically involved in flow regulation. During valve regulation, the controlled valve is required to open to the necessary degree, thereby controlling the flow rate of the medium in the pipeline to meet the process requirements of the unit. Valve regulation involves all equipment in the entire unit; a failure would cause the entire unit to shut down, resulting in significant damage and losses. When the unit requires regulation, the valves involved must execute the action commands safely, reliably, and quickly according to process requirements. This poses a challenge to the electro-hydraulic control system. To ensure that the electro-hydraulic control system flawlessly executes the control requirements and controls the valves to complete their actions when unit conditions are triggered, its safety, reliability, and rapid response are particularly critical.

[0004] Due to the presence of high temperatures, high pressures, and flammable and explosive gases at petrochemical work sites, higher demands are placed on electro-hydraulic control systems. As a key component of electro-hydraulic control systems, traditional integrated manifolds suffer from limitations due to space constraints, resulting in overly simplistic functions and incomplete circuit functionality. They cannot achieve functional independence and non-interference between multi-functional integrated circuits without increasing the overall size of the integrated manifold and while still providing a wide range of functionalities. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention provides a multifunctional parallel integrated manifold hydraulic circuit, which ensures the safe operation of controlled valves and their reliable actuation in new chemical plants such as catalytic cracking, coal chemical industry, and propane-to-propylene production. It addresses the special control requirements of specific valves participating in plant operations, effectively protecting large units and even the entire plant. In the industrial field, through optimized oil circuit design, the integrated manifold achieves the smallest and most compact size in three dimensions, saving space while reducing the friction damping of the hydraulic system. In applications in petrochemical, coal chemical, power, metallurgical, water conservancy, and aerospace industries, it meets optimal structural dimensions while possessing multiple functions. Multiple control functions operate independently without interference, and the multifunctional parallel integrated manifold hydraulic circuit greatly expands the application range of the integrated manifold.

[0006] This utility model provides a multifunctional integrated hydraulic circuit, comprising: a first functional module, a filter module, a special valve control module, an integrated hydraulic block, and an oil tank. System pressure oil is transmitted to the filter module through a first check valve, and the filter module transmits the system pressure oil to the first functional module through a second check valve. The first functional module transmits the system pressure oil to the special valve control module. The special valve control module returns the system pressure oil to the oil tank through the first functional module. The first functional module is installed on the outer surface of the integrated hydraulic block to form a transmission oil circuit.

[0007] Furthermore, it also includes a pressure replenishing module and a second functional module. In the initial state, the pressure replenishing module replenishes the pressure of the transmission oil circuit. By changing the state of the second functional module, the second functional module returns the system pressure oil to the oil tank. The second functional module is installed on the outer surface of the integrated oil circuit block to form the transmission oil circuit.

[0008] Furthermore, a locking valve, a jog directional valve, a proportional valve, an unloading valve, a manual directional valve, and a relief valve are sequentially installed on the front side of the integrated hydraulic circuit block along the x-direction, and a hydraulic lock is installed on the front side of the integrated hydraulic circuit block along the z-direction of the locking valve.

[0009] Two hydraulic check valves are sequentially installed on the back of the integrated oil circuit block along the z-direction, and a second check valve is installed on the back of the integrated oil circuit block along the z-direction of the unloading valve.

[0010] A pressure sensor is installed on the top surface of the integrated oil passage block;

[0011] The right side of the integrated oil circuit block is equipped with a second shut-off valve, a manual unloading valve, and a first check valve.

[0012] Furthermore, the first functional module is a proportional control submodule, which includes a proportional valve and a hydraulically controlled check valve. The second check valve transmits the system pressure oil to the proportional valve, which then transmits the system pressure oil to the rod chamber of the special valve control module via the hydraulically controlled check valve. The system pressure oil in the rodless chamber of the special valve control module returns to the oil tank via the hydraulically controlled check valve and then the proportional valve. Alternatively, the proportional valve transmits the system pressure oil to the rodless chamber of the special valve control module via the hydraulically controlled check valve, and the system pressure oil in the rod chamber of the special valve control module returns to the oil tank via the hydraulically controlled check valve and then the proportional valve.

[0013] Furthermore, the first functional module is a jog control submodule, which includes a jog directional valve and a hydraulic lock. In the initial state of the jog directional valve, the pressure replenishment module replenishes the transmission oil circuit. By changing the valve core state of the jog directional valve, the second check valve transmits the system pressure oil to the jog directional valve. The jog directional valve transmits the system pressure oil to the rod chamber of the special valve control module through the hydraulic lock. The system pressure oil in the rodless chamber of the special valve control module returns to the oil tank through the hydraulic lock and then through the jog directional valve. Alternatively, the jog directional valve transmits the system pressure oil to the rodless chamber of the special valve control module through the hydraulic lock. The system pressure oil in the rod chamber of the special valve control module returns to the oil tank through the hydraulic lock and then through the jog directional valve.

[0014] Furthermore, the first functional module is a manual reversing submodule, which includes a manual reversing valve. In the initial state of the manual reversing valve, the pressure replenishing module replenishes the transmission oil circuit, manually changing the valve core state of the manual reversing valve. The system pressure oil is transmitted through the manual reversing valve to the rod chamber of the special valve control module, and the system pressure oil in the rodless chamber of the special valve control module returns to the oil tank through the manual reversing valve. Alternatively, the system pressure oil is transmitted through the manual reversing valve to the rodless chamber of the special valve control module, and the system pressure oil in the rod chamber of the special valve control module returns to the oil tank through the manual reversing valve.

[0015] Furthermore, the second functional module is a lock position control submodule, which includes a lock position valve. In the initial state of the lock position valve, the pressure replenishment module replenishes the transmission oil circuit. By changing the valve core state of the lock position valve, the system pressure oil returns to the oil tank through the lock position valve.

[0016] Furthermore, the second functional module is an overflow control submodule, which includes an overflow valve. In the initial state, the overflow valve is not connected to the oil tank. When the system pressure is greater than the spring force of the overflow valve, the overflow valve is connected to the oil tank, and the system pressure oil returns to the oil tank through the overflow valve.

[0017] Furthermore, the second functional module is an unloading control submodule, which includes an unloading valve. When the system pressure is lower than the maximum pressure, the unloading valve is not connected to the oil tank. When the system pressure is higher than the pressure threshold, the unloading valve is connected to the oil tank, and the system pressure oil returns to the oil tank through the unloading valve.

[0018] The second functional module is a manual unloading control submodule, which includes a manual unloading valve. When the special valve control module needs to manually change the position, the manual unloading valve is rotated, and the system pressure oil is transmitted to the oil tank through the manual unloading valve.

[0019] Furthermore, the filter module includes a high-pressure dual filter. By using the filter handle, a new filter element of the high-pressure dual filter is switched to the transmission oil circuit, and the original filter element of the high-pressure dual filter is switched out of the transmission oil circuit for replacement.

[0020] The input and output pressures of the high-pressure dual filter are obtained by pressure sensors. The input and output pressures are compared. When the pressure difference is greater than a threshold, a high-pressure dual filter contamination alarm is triggered.

[0021] The above-described one or more technical solutions in the embodiments of this utility model have at least one of the following technical effects:

[0022] By adopting a multi-functional integrated manifold, the functionality of the hydraulic system is increased, greatly improving its safety and scope of application. This avoids the failure of actuators due to controller, electrical components, and hydraulic components, which could affect the operation of the entire hydraulic system. The comprehensive functions of the integrated manifold make the system safer and more reliable.

[0023] By adopting integrated hydraulic manifolds, the three-dimensional dimensions of the integrated hydraulic manifolds are minimized and optimized, so that the integrated hydraulic manifolds occupy the least space. This avoids the problems of piping difficulties, component interference, and excessive size of the entire control cabinet caused by the excessive size of the integrated hydraulic manifolds. It solves the problems of assembly difficulties and limited on-site space, and achieves the effect of compact structure of the entire hydraulic system.

[0024] By adopting a multi-functional integrated manifold, multiple functions of the hydraulic circuit can operate independently and in parallel, ensuring that multiple functions do not interfere with each other and avoiding hydraulic system failures caused by circuit interference. When the valve is closing quickly, the jog solenoid valve and proportional valve of the parallel circuit work simultaneously, which improves the valve closing speed. The use of a multi-functional integrated manifold improves the practicality of the entire system, reduces the system's failure points, and achieves a safe and stable system effect.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This utility model provides a hydraulic system flow chart for a multifunctional integrated oil circuit block hydraulic circuit.

[0028] Figure 2 This utility model provides a proportional control flowchart for a multifunctional integrated oil circuit block hydraulic circuit.

[0029] Figure 3 This utility model provides a flow chart for the jog control of a hydraulic circuit of a multifunctional integrated oil circuit block.

[0030] Figure 4 This utility model provides a manual control flowchart for a multifunctional integrated oil circuit block hydraulic circuit.

[0031] Figure 5 This utility model provides a flowchart of the locking control process for a multifunctional integrated oil circuit block hydraulic circuit.

[0032] Figure 6 This utility model provides an overflow control flowchart for a multi-functional integrated oil circuit block hydraulic circuit.

[0033] Figure 7 This utility model provides a flowchart of unloading control for a multifunctional integrated oil circuit block hydraulic circuit and manual switching control for a high-pressure dual filter.

[0034] Figure 8 This utility model provides a flowchart of a high-pressure dual-filter differential pressure alarm for a multi-functional integrated oil circuit block hydraulic circuit.

[0035] Figure 9 This is a front view of the structure of a multifunctional integrated oil circuit block hydraulic circuit provided by this utility model.

[0036] Figure 10 This is a structural back view of a multifunctional integrated oil circuit block hydraulic circuit provided by this utility model.

[0037] Figure 11 This is a top view of the structure of a multifunctional integrated oil circuit block hydraulic circuit provided by this utility model.

[0038] Figure 12 This is a right view of the structure of a multifunctional integrated oil circuit block hydraulic circuit provided by this utility model.

[0039] Figure 13 This is a top view of the structure of a multifunctional integrated oil circuit block hydraulic circuit provided by this utility model.

[0040] Figure 14 This is a left view of the structure of a multifunctional integrated oil circuit block hydraulic circuit provided by this utility model.

[0041] Figure label:

[0042] 1. Liquid level and temperature sensor; 2. Radiator; 3. Oil tank; 4. Air filter; 5. Integrated oil manifold; 6. Filter; 7. First shut-off valve; 8. Hydraulic pump; 9. First check valve; 10. First pressure sensor; 11. Relief valve; 12. High-pressure dual filter; 13. Second check valve; 14. Unloading valve; 15. Accumulator; 16. Three-way ball valve; 17. Pressure gauge; 18. Second pressure sensor; 19. Second shut-off valve; 20. Jog directional valve; 21. Manual directional valve; 22. Proportional valve; 23. Locking valve; 24. Manual unloading valve; 25. Hydraulic lock; 26. First hydraulically controlled check valve; 27. Second hydraulically controlled check valve; 28. Special valve control module; 29. ​​Visual thermometer. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The following embodiments are used to illustrate this utility model, but cannot be used to limit the scope of this utility model.

[0044] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] The following is combined Figures 1 to 14 This invention describes a multifunctional integrated oil circuit block hydraulic circuit.

[0048] like Figure 1 As shown, a multi-functional integrated hydraulic circuit includes a first functional module, a filter module, a special valve control module, an integrated hydraulic block, and an oil tank. System pressure oil is transmitted to the filter module through a first check valve 9. The filter module transmits the system pressure oil to the first functional module through a second check valve 13. The first functional module transmits the system pressure oil to the special valve control module. The special valve control module returns the system pressure oil to the oil tank 3 through the first functional module.

[0049] The first functional module is installed on the outer surface of the integrated oil circuit block 5 to form a transmission oil circuit.

[0050] It also includes a pressure replenishing module and a second functional module. In the initial state, the pressure replenishing module replenishes the transmission oil circuit. By changing the state of the second functional module, the second functional module returns the system pressure oil to the oil tank 3. The second functional module is installed on the outer surface of the integrated oil circuit block to form a transmission oil circuit.

[0051] The pressure replenishment module includes an accumulator 15 and a three-way ball valve 16, which controls the opening and closing of the accumulator 15. The pressure value of the second pressure sensor 18 can be read through the pressure gauge 17.

[0052] by Figure 9 The front view shown is the reference point, with the horizontal direction being the x-direction and the vertical direction being the z-direction.

[0053] like Figures 9 to 14 As shown, the integrated hydraulic circuit block 5 is equipped with a locking valve 23, a jog directional valve 20, a proportional valve 22, an unloading valve 14, a manual directional valve 21, and a relief valve 11 in sequence along the x-direction on the front side. The hydraulic lock 25 is installed on the front side of the integrated hydraulic circuit block along the z-direction of the locking valve 23.

[0054] like Figure 10 As shown, a first hydraulic check valve 26 and a second hydraulic check valve 27 are sequentially installed on the back of the integrated oil circuit block along the z-direction, and a second check valve 13 is installed on the back of the integrated oil circuit block along the z-direction of the unloading valve 14.

[0055] like Figure 13 As shown, a second pressure sensor 18 is installed on the top surface of the integrated oil circuit block.

[0056] like Figure 12 As shown, a second shut-off valve 19, a manual unloading valve 24, and a first check valve 9 are installed on the right side of the integrated oil circuit block.

[0057] like Figure 11 As shown, a first pressure sensor 10 is installed on the front of the integrated oil circuit block along the z-direction of the lock valve 23, and a pressure gauge 17 is installed along the z-direction of the relief valve 11.

[0058] The liquid level and temperature of the oil tank can be obtained in real time through the liquid level and temperature sensor 1. The temperature of the oil tank can be reduced through the radiator 2. The hydraulic oil in the oil tank is transferred to the hydraulic pump 8 through the filter 6 and the first shut-off valve 7. The oil tank temperature can be read through the visual thermometer 29.

[0059] like Figure 2As shown, the first functional module is a proportional control submodule, which includes a proportional valve 22 and a hydraulic check valve. The second check valve 13 transmits system pressure oil to the proportional valve 22. The proportional valve 22 transmits system pressure oil to the rodless chamber of the special valve control module 28 through the hydraulic check valve. The pressure oil in the rod chamber of the special valve control module 28 returns to the oil tank 3 through the hydraulic check valve and then through the proportional valve. Alternatively, the proportional valve 22 transmits system pressure oil to the rod chamber of the special valve control module 28 through the hydraulic check valve. The pressure oil in the rodless chamber of the special valve control module 28 returns to the oil tank 3 through the hydraulic check valve and then through the proportional valve.

[0060] The hydraulic control check valve includes a first hydraulic control check valve 26 and a second hydraulic control check valve 27.

[0061] In some specific embodiments of this utility model, the valve ports of the first hydraulic check valve 26 and the second hydraulic check valve 27 are connected to the inlet and outlet ports of the special valve control module 28. At this time, the oil level in the tank can be obtained in real time through the liquid level and temperature sensor 1, the temperature of the tank can be reduced through the radiator 2, and the hydraulic oil in the tank is transferred to the hydraulic pump 8 through the filter 6 and the first shut-off valve 7. The system pressure oil at the outlet of the hydraulic pump 8 opens the first check valve 9, and is divided into two paths: one path enters the high-pressure dual filter 12, and the other path enters the relief valve 11. The system pressure oil passing through the high-pressure dual filter 12 enters the second check valve 13 and the other path enters the unloading valve 14. The system pressure oil passing through the second check valve 13 enters the accumulator 15 for pressure replenishment and the other path enters the inlet of the proportional valve 22. Since the valve core of the proportional valve is always in a proportional action state, to prevent the controlled object from running away... A hydraulically controlled check valve is connected in series in the inlet and outlet oil circuits of the proportional valve 22. When the proportional valve 22 is operating normally, the accumulator acts as a pressure supplement, opening the two hydraulically controlled check valves. The controller then controls the valve core of the proportional valve 22 to move. The system pressure oil is transmitted through the first hydraulically controlled check valve 26 to the rodless chamber of the special valve control module 28. The pressure oil in the rod chamber of the special valve control module 28 returns to the oil tank 3 through the second hydraulically controlled check valve 27 and then through the proportional valve 22. Alternatively, the system pressure oil is transmitted through the second hydraulically controlled check valve 27 to the rod chamber of the special valve control module 28, and the pressure oil in the rodless chamber of the special valve control module 28 returns to the oil tank 3 through the first hydraulically controlled check valve 26 and then through the proportional valve. This controls the opening and closing of the special valves in the special valve control module 28. The dual closed-loop control of the proportional control function solves the problem of precise remote position control of valve opening and closing at the work site, achieving the effect of proportionally controlling the opening or closing of the special valves in the special valve control module 28.

[0062] The second shut-off valve 19 ensures that the accumulator plays a role in pressure replenishment when the proportional valve 22 is operating normally.

[0063] like Figure 3 As shown, the first functional module is a jog control submodule, which includes a jog directional valve 20 and a hydraulic lock 25. In the initial state of the jog directional valve 20, the pressure replenishment module replenishes the transmission oil circuit. By changing the valve core state of the jog directional valve 20, the second check valve 13 transmits system pressure oil to the jog directional valve 20. The jog directional valve 20 transmits pressure oil to the rod chamber of the special valve control module through the pressure port of the hydraulic lock. The system pressure oil in the rodless chamber of the special valve control module returns to the oil tank through the return port of the hydraulic lock and then through the jog directional valve 20. Alternatively, the jog directional valve 20 transmits pressure oil to the rodless chamber of the special valve control module through the hydraulic lock 25. The system pressure oil in the rod chamber of the special valve control module returns to the oil tank through the hydraulic lock 25 and then through the jog directional valve 20.

[0064] In some specific embodiments of this utility model, the jog directional valve 20 is connected to the inlet and outlet ports of the special valve control module 28 via the hydraulic lock 25. The system pressure oil at the outlet of the hydraulic pump 8 opens the first check valve 9, which splits into two paths: one path enters the high-pressure dual filter 12, and the other path enters the relief valve 11. The system pressure oil passing through the high-pressure dual filter 12 enters the second check valve 13 and the other path enters the unloading valve 14. The system pressure oil passing through the second check valve 13 enters the accumulator 15 for pressure replenishment and the other path enters the inlet of the jog directional valve 20. Under normal working conditions of the jog control function, the pressure replenishment module plays a pressure replenishment role. By pressing the jog control button, the electromagnet on one side of the jog directional valve 20 is energized, and the valve core of the directional valve moves. The system pressure oil enters the rod chamber or rodless chamber of the cylinder, thereby controlling the opening and closing of the controlled special valve. The realization of the jog control function solves the problem that the valve cannot be opened and closed by hydraulic pressure jogging under the energized state at the work site, and achieves the effect of jogging control of the special valve to open or close.

[0065] like Figure 4 As shown, the first functional module is a manual reversing submodule, which includes a manual reversing valve 21. In the initial state of the manual reversing valve 21, the pressure replenishment module replenishes the transmission oil circuit, and the valve core state of the manual reversing valve 21 is manually changed. The system pressure oil is transmitted to the rod chamber of the special valve control module through the manual reversing valve 21. The system pressure oil in the rodless chamber of the special valve control module returns to the oil tank 3 through the manual reversing valve 21. Alternatively, the system pressure oil is transmitted to the rodless chamber of the special valve control module through the manual reversing valve 21, and the system pressure oil in the rod chamber of the special valve control module returns to the oil tank 3 through the manual reversing valve 21.

[0066] In some specific embodiments of this utility model, the inlet and outlet ports of the manual directional valve 21 and the special valve control module 28 are connected. The system pressure oil at the outlet of the hydraulic pump 8 opens the first check valve 9, and is divided into two paths: one path enters the high-pressure dual filter 12, and the other path enters the relief valve 11. The system pressure oil passing through the high-pressure dual filter 12 enters the second check valve 13 and the other path enters the unloading valve 14. The system pressure oil passing through the second check valve 13 enters the accumulator 15 for pressure replenishment and the other path enters the inlet of the manual directional valve 21. Under normal operating conditions, the accumulator 15 plays a role in pressure replenishment. By switching the handle of the manual directional valve 21, the valve core of the manual directional valve 21 is actuated, and the system pressure oil enters the rod chamber or rodless chamber of the cylinder, thereby controlling the opening and closing of the controlled special valve. The realization of the manual control function solves the problem that the valve cannot be controlled by hydraulic pressure when the controller is abnormal or not powered at the work site, and achieves the effect of manually controlling the opening or closing of the special valve.

[0067] like Figure 5 As shown, the second functional module is the lock position control submodule, which includes a lock position valve 23. When the lock position valve 23 is in its initial state, the pressure replenishment module replenishes the transmission oil circuit. By changing the valve core state of the lock position valve 23, the system pressure oil returns to the oil tank 3 through the lock position valve 23.

[0068] In some specific embodiments of this utility model, when the integrated oil circuit block performs the lock-up control function, the system pressure oil at the outlet of the hydraulic pump 8 opens the first check valve 9, and is divided into two paths: one path enters the high-pressure dual filter 12, and the other path enters the relief valve 11. The system pressure oil passing through the high-pressure dual filter 12 enters the second check valve 13 and the other path enters the unloading valve 14. The system pressure oil passing through the second check valve enters the accumulator for pressure replenishment and the other path enters the inlet of the lock-up valve 23. Under normal working conditions of the lock-up control function, the accumulator plays the role of pressure replenishment. When the electromagnet of the locking valve 23 is de-energized, the valve core of the locking valve 23 actuates, and the system pressure oil cannot enter the hydraulic port of the hydraulic control check valve through the oil port of the locking valve 23. As a result, the valve port of the hydraulic control check valve is in a closed state, and the system pressure oil at the port of the proportional valve 22 cannot enter the rod chamber or rodless chamber of the cylinder through the hydraulic control check valve. Since the oil passages of the rod and rodless chambers are isolated and cannot flow when locked, the safety of the special valve control module 28 is ensured in the locked state, avoiding the actuation of the special valve due to misoperation, etc., and increasing the stability of the entire system.

[0069] like Figure 6As shown, the second functional module is an overflow control submodule, which includes an overflow valve 11. In the initial state, the overflow valve 11 is not connected to the oil tank 3. When the system pressure is greater than the spring force of the overflow valve 11, the overflow valve 11 is connected to the oil tank 3, and the system pressure oil returns to the oil tank 3 through the overflow valve 11.

[0070] In some specific embodiments of this utility model, when the integrated oil circuit block performs the system safety overflow function, the overflow valve 11 is connected to the return oil port of the oil tank 3. The system pressure oil at the outlet of the hydraulic pump 8 opens the first check valve 9 and is divided into two paths through the first check valve. One path enters the high-pressure dual filter 12, and the other path enters the inlet of the overflow valve 11. Under normal working conditions, the oil inlet of the overflow valve 11 is disconnected from the return oil port of the oil tank 3. When the high-pressure dual filter 12 is blocked, causing the system pressure to exceed the safety setting pressure of the entire system, the overflow function is activated. When the system pressure exceeds the spring force of the overflow valve 11, the valve core of the overflow valve 11 moves. The change in the working function of the overflow valve 11 connects the system pressure and the return oil tank, and the system pressure oil at the outlet of the hydraulic pump 8 returns to the oil tank 3, thereby ensuring that the pressure of the entire system does not exceed the safety setting pressure. The implementation of the overflow function solves the pressure abnormality caused by system blockage and achieves the effect of safety protection for the entire system.

[0071] like Figure 7 As shown, the second functional module is the unloading control submodule, which includes an unloading valve 14. When the system pressure is lower than the maximum pressure, the unloading valve 14 is not connected to the oil tank 3. When the system pressure is higher than the pressure threshold, the unloading valve 14 is connected to the oil tank 3, and the system pressure oil returns to the oil tank through the unloading valve 14.

[0072] In some specific embodiments of this utility model, when the integrated hydraulic circuit block performs the unloading function, the system pressure oil at the outlet of the hydraulic pump 8 opens the first check valve 9, and is divided into two paths by the first check valve. One path enters the high-pressure dual filter 12, and the other path enters the relief valve 11. The system pressure oil passing through the high-pressure dual filter 12 enters the second check valve 13 and the unloading valve 14 inlet. In the hydraulic system, the frequent starting and stopping of the hydraulic pump 8, as a power device, will affect the service life of the hydraulic pump 8. To reduce the failure rate of the hydraulic pump 8 and increase its service life, the multi-functional integrated hydraulic circuit block... An unloading circuit is added to the hydraulic circuit. When the system pressure is lower than the maximum pressure, the unloading valve 14 is not energized and the valve port is closed. When the system pressure is higher than the maximum pressure, the electromagnet of the unloading valve 14 is energized, the valve core moves and the valve port opens, and the system pressure oil returns to the oil tank 3 through the valve port of the unloading valve 14. When the controller determines that the system pressure is lower than the maximum pressure, the unloading valve is de-energized and the valve port closes, and the system is in a pressurized state. The unloading valve performs this cyclic judgment work to enable the hydraulic pump 8 to work continuously under zero-load and load conditions, ensuring the service life of the hydraulic pump 8 in the system.

[0073] like Figure 1 As shown, the second functional module is the manual unloading control submodule, which includes a manual unloading valve 24. When the special valve control module 28 needs to manually change its position, the manual unloading valve 24 is rotated, and the system pressure oil is transmitted to the oil tank 3 through the manual unloading valve 24.

[0074] In some specific embodiments of this utility model, the manual unloading valve 24 is in the closed state during normal operation. When the special valve control module 28 needs to be manually changed, in order to prevent the rodless chamber and / or rod chamber of the special valve control module from being pressurized and manual operation is not possible, the manual unloading valve 24 is rotated, and the system pressure oil is transmitted to the oil tank 3 through the manual unloading valve 24.

[0075] like Figures 1 to 8 As shown, the filter module includes a high-pressure dual filter 12. By using the filter handle, a new filter element of the high-pressure dual filter 12 is switched to the transmission oil circuit, and the original filter element of the high-pressure dual filter 12 is switched out of the transmission oil circuit for replacement.

[0076] In some specific embodiments of this utility model, when the integrated oil circuit block performs the manual switching function of the high-pressure dual filter, it is only necessary to rotate the filter handle to switch one new filter element of the high-pressure dual filter 12 into the main oil circuit, and the original filter element of the high-pressure dual filter 12 is switched out of the main oil circuit for replacement. The system pressure oil at the outlet of the hydraulic pump 8 opens the first check valve 9, and is divided into two paths through the first check valve 9. One path enters the high-pressure dual filter 12, and the other path enters the relief valve 11. The system pressure oil after passing through the high-pressure filter enters the second check valve 13 and the unloading valve 14. Under normal working conditions, the high-pressure dual filter 12 has a check valve before and after it. In the circuit of the high-pressure dual filter 12, the installation method of the high-pressure dual filter 12 is designed as a pipe connection. Under the state of isolation between the front and rear circuits, the high-pressure dual filter can be replaced online. With the dual filter design, when there is an alarm in the visual window, the other filter element of the high-pressure dual filter is switched in, making the entire high-pressure dual filter circuit simpler and the operation more convenient.

[0077] like Figure 8 As shown, the input pressure of the high-pressure dual filter 12 is obtained through the first pressure sensor 10, and the output pressure of the high-pressure dual filter 12 is obtained through the second pressure sensor 18. The input pressure and the output pressure are compared. When the pressure difference is greater than the threshold, the high-pressure dual filter 12 is activated for pollution alarm.

[0078] The controller determines the pressure before and after the high-pressure filter to reflect its working status. The system pressure oil at the outlet of hydraulic pump 8 opens the first check valve 9, which splits the oil into three paths: one path goes to the first pressure sensor 10, one path goes to the high-pressure dual filter 12, and the other path goes to the relief valve 11. The system pressure oil after passing through the high-pressure dual filter goes to the second check valve 13, one path goes to the unloading valve 14, and one path of the hydraulic oil after passing through the check valves goes to the second pressure sensor 18. The two pressure sensors collect the system pressure values ​​and send them to the controller. The controller compares the pressure values ​​before and after the high-pressure dual filter. When the pressure difference exceeds the set allowable value, a filter contamination alarm is triggered in the controller. The controller's judgment determines the filter's working status, realizing the digital control of the hydraulic system.

[0079] The integrated hydraulic manifold of this utility model features a rich control circuit system. By adopting a multi-functional integrated hydraulic manifold, the functions of the hydraulic system are increased, greatly improving the safety and scope of application of the hydraulic system. It avoids the failure of the actuator due to the malfunction of the controller, electrical components, and hydraulic components, which would affect the operation of the entire hydraulic system. The comprehensive functions of the integrated hydraulic manifold make the system safer and more reliable.

[0080] By adopting integrated hydraulic manifolds, the three-dimensional dimensions of the integrated hydraulic manifolds are minimized and optimized, so that the integrated hydraulic manifolds occupy the least space. This avoids the problems of piping difficulties, component interference, and excessive size of the entire control cabinet caused by the excessive size of the integrated hydraulic manifolds. It solves the problems of assembly difficulties and limited on-site space, and achieves the effect of compact structure of the entire hydraulic system.

[0081] By employing a multi-functional integrated manifold, multiple functions of the hydraulic circuit can operate independently and in parallel, ensuring that these functions do not interfere with each other and avoiding hydraulic system failures caused by circuit interference. During valve fast closing, the jog solenoid valve and proportional valve in the parallel circuit operate simultaneously, increasing the valve closing speed. The use of a multi-functional integrated manifold enhances the overall system's usability, reduces potential failure points, and achieves a safe and stable system.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multifunctional integrated hydraulic circuit block, characterized in that, The system includes a first functional module, a filter module, a special valve control module, an integrated oil circuit block, and an oil tank. System pressure oil is transmitted to the filter module through a first check valve. The filter module then transmits the system pressure oil to the first functional module through a second check valve. The first functional module transmits the system pressure oil to the special valve control module. The special valve control module returns the system pressure oil to the oil tank through the first functional module. The first functional module is installed on the outer surface of the integrated oil circuit block to form a transmission oil circuit.

2. The multifunctional integrated hydraulic circuit block according to claim 1, characterized in that, It also includes a pressure replenishing module and a second functional module. In the initial state, the pressure replenishing module replenishes the pressure of the transmission oil circuit. By changing the state of the second functional module, the second functional module returns the system pressure oil to the oil tank. The second functional module is installed on the outer surface of the integrated oil circuit block to form the transmission oil circuit.

3. The multifunctional integrated hydraulic circuit block according to claim 2, characterized in that, The integrated hydraulic circuit block has a locking valve, a jog directional valve, a proportional valve, an unloading valve, a manual directional valve, and a relief valve installed sequentially on the front side along the x-direction. A hydraulic lock is installed on the front side of the integrated hydraulic circuit block along the z-direction of the locking valve. Two hydraulic check valves are sequentially installed on the back of the integrated oil circuit block along the z-direction, and a second check valve is installed on the back of the integrated oil circuit block along the z-direction of the unloading valve. A pressure sensor is installed on the top surface of the integrated oil passage block; The right side of the integrated oil circuit block is equipped with a second shut-off valve, a manual unloading valve, and a first check valve.

4. The multifunctional integrated oil circuit block hydraulic circuit according to claim 3, characterized in that, The first functional module is a proportional control submodule, which includes a proportional valve and a hydraulically controlled check valve. The second check valve transmits the system pressure oil to the proportional valve. The proportional valve transmits the system pressure oil to the rod chamber of the special valve control module through the hydraulically controlled check valve. The system pressure oil in the rodless chamber of the special valve control module returns to the oil tank through the hydraulically controlled check valve and then through the proportional valve. Alternatively, the proportional valve transmits the system pressure oil to the rodless chamber of the special valve control module through the hydraulically controlled check valve. The system pressure oil in the rod chamber of the special valve control module returns to the oil tank through the hydraulically controlled check valve and then through the proportional valve.

5. The multifunctional integrated hydraulic circuit block according to claim 3, characterized in that, The first functional module is a jog control submodule, which includes a jog directional valve and a hydraulic lock. In the initial state of the jog directional valve, the pressure replenishment module replenishes the transmission oil circuit. By changing the valve core state of the jog directional valve, the second check valve transmits the system pressure oil to the jog directional valve. The jog directional valve transmits the system pressure oil to the rod chamber of the special valve control module through the hydraulic lock. The system pressure oil in the rodless chamber of the special valve control module returns to the oil tank through the hydraulic lock and then through the jog directional valve. Alternatively, the jog directional valve transmits the system pressure oil to the rodless chamber of the special valve control module through the hydraulic lock. The system pressure oil in the rod chamber of the special valve control module returns to the oil tank through the hydraulic lock and then through the jog directional valve.

6. The multifunctional integrated oil circuit block hydraulic circuit according to claim 3, characterized in that, The first functional module is a manual reversing submodule, which includes a manual reversing valve. In the initial state of the manual reversing valve, the pressure replenishing module replenishes the transmission oil circuit, manually changing the valve core state of the manual reversing valve. The system pressure oil is transmitted through the manual reversing valve to the rod chamber of the special valve control module, and the system pressure oil in the rodless chamber of the special valve control module returns to the oil tank through the manual reversing valve. Alternatively, the system pressure oil is transmitted through the manual reversing valve to the rodless chamber of the special valve control module, and the system pressure oil in the rod chamber of the special valve control module returns to the oil tank through the manual reversing valve.

7. The multifunctional integrated hydraulic circuit block according to claim 3, characterized in that, The second functional module is a lock position control submodule, which includes a lock position valve. In the initial state of the lock position valve, the pressure replenishment module replenishes the transmission oil circuit. By changing the valve core state of the lock position valve, the system pressure oil returns to the oil tank through the lock position valve.

8. The multifunctional integrated oil circuit block hydraulic circuit according to claim 3, characterized in that, The second functional module is an overflow control submodule, which includes an overflow valve. In the initial state, the overflow valve is not connected to the oil tank. When the system pressure is greater than the spring force of the overflow valve, the overflow valve is connected to the oil tank, and the system pressure oil returns to the oil tank through the overflow valve.

9. A multifunctional integrated hydraulic circuit block according to claim 3, characterized in that, The second functional module is an unloading control submodule, which includes an unloading valve. When the system pressure is lower than the maximum pressure, the unloading valve is not connected to the oil tank. When the system pressure is higher than the pressure threshold, the unloading valve is connected to the oil tank, and the system pressure oil returns to the oil tank through the unloading valve. The second functional module is a manual unloading control submodule, which includes a manual unloading valve. When the special valve control module needs to manually change the position, the manual unloading valve is rotated, and the system pressure oil is transmitted to the oil tank through the manual unloading valve.

10. A multifunctional integrated hydraulic circuit block according to claim 3, characterized in that, The filter module includes a high-pressure dual filter. By using the filter handle, a new filter element of the high-pressure dual filter is switched to the transmission oil circuit, and the original filter element of the high-pressure dual filter is switched out of the transmission oil circuit for replacement. The input and output pressures of the high-pressure dual filter are obtained by pressure sensors. The input and output pressures are compared. When the pressure difference is greater than a threshold, a high-pressure dual filter contamination alarm is triggered.

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