A control valve block for a hydraulic automatic unscrambling device

Abstract

A control valve block for a hydraulic automatic jigger belongs to the technical field of hydraulic automatic jigger. In order to solve the problems of low control precision of the hydraulic motor speed, low jigger control oil pressure and the inability to supply lubricating oil under the jigger shutdown working condition of the existing hydraulic automatic jigger control valve block, the control valve block comprises two oil inlets and three oil outlets, four main oil paths are formed between the oil inlets and the oil outlets, the four main oil paths are a valve block control oil path, a valve block working oil path, a valve block lubricating oil path and a slider oil return path, the oil path inlet of the valve block control oil path is a top shaft oil inlet, and the oil path outlet is a control oil outlet; the oil path inlet of the valve block working oil path is a top shaft oil inlet, and the oil path outlet is a working oil outlet; the oil path inlet of the valve block lubricating oil path is a lubricating oil inlet, and the oil path outlet is a working oil outlet; and the oil path inlet of the slider oil return path is a drain port of each valve block, and the oil path outlet is a return port. The control valve block is used for a hydraulic automatic jigger.

Description

TECHNICAL FIELD

[0001] The application relates to a control valve block for a liquid-controlled automatic jigger, and belongs to the technical field of the liquid-controlled automatic jigger. BACKGROUND

[0002] The liquid-controlled automatic jigger is usually equipped in a steam turbine or a steam turbine unit, and is used for jiggering a rotor before starting or after stopping of the unit, so that the rotor is kept running at a low rotating speed (a few revolutions per minute to a few hundred revolutions per minute), and the purpose is to reduce the starting torque of the unit and uniformly cool the rotor. In order to save installation space, a hydraulic motor is usually selected as a driving power device of the jigger, and a corresponding control valve block is equipped, which is used for controlling the rotating speed of the hydraulic motor and providing required control oil for an internal clutch of the jigger. The liquid-controlled automatic jigger usually has the following four working conditions, and the functions of the existing control valve block in the working conditions are shown in Table 1.

[0003] Table 1

[0004]

[0005] It can be known from the analysis on the structure and function of the existing liquid-controlled automatic jigger control valve block that the existing control valve block has simple structure and simple control principle, but there are still some deficiencies in the function.

[0006] Firstly, the same overflow valve is used to realize the control of the working oil flow of the hydraulic motor and the rotating speed of the motor in the static and dynamic input conditions of the jigger. Only one overflow valve is equipped, and in a large flow control range, due to the existence of a control dead zone, the control requirements of small working oil flow and high control precision in the static input of the jigger and the control requirements of large working oil flow and relatively high control precision in the dynamic input cannot be met at the same time, so that the control precision of the rotating speed of the hydraulic motor is reduced. The insufficient control precision of the rotating speed of the hydraulic motor will cause the jigger to frequently fail to be smoothly input in the use process, which will greatly reduce the jigger working efficiency, even seriously affect the service life of the internal transmission shaft system of the jigger, and reduce the reliability of the jigger.

[0007] Secondly, the unit lubricating oil is directly used as the control oil of the clutch inside the jigger by the existing control valve block, and the unit lubricating oil usually has a low pressure (mostly 0.1-0.3 MPa), which makes the control oil pressure of the jigger clutch also relatively low and uncontrollable. When the control oil leakage is large and the clutch slipper is heavy, the clutch may not be smoothly engaged or the engagement speed may be slow, which will directly reduce the smoothness and input speed of the jigger.

[0008] Finally, the existing control valve block does not have a hydraulic motor lubricating oil passage when the turning gear device is stopped. This can cause the hydraulic motor to be stuck due to the presence of oil sludge or foreign matter in the working oil passage when the turning gear device is started again after a long shutdown, which reduces the working efficiency and service life of the turning gear device to some extent. SUMMARY

[0009] The present application aims to solve the problems of low control precision of the hydraulic motor speed, low turning control oil pressure, and inability to supply lubricating oil under the turning gear shutdown condition of the existing liquid-controlled automatic turning gear control valve block, and provides a control valve block for a liquid-controlled automatic turning gear.

[0010] The control valve block for a liquid-controlled automatic turning gear comprises two oil inlets and three oil outlets, and four main oil passages are formed between the oil inlets and the oil outlets.

[0011] The two oil inlets are a top shaft oil inlet and a lubricating oil inlet; the top shaft oil inlet is communicated with the unit top shaft oil passage, and the lubricating oil inlet is communicated with the unit lubricating oil passage.

[0012] The three oil outlets are a control oil outlet, a working oil outlet, and a return oil port; the control oil outlet is communicated with the internal clutch of the turning gear, the working oil outlet is communicated with the oil inlet of the hydraulic motor, and the return oil port is communicated with the unit return oil passage.

[0013] The four main oil passages are a valve block control oil passage, a valve block working oil passage, a valve block lubricating oil passage, and a sliding block return oil passage.

[0014] The oil passage inlet of the valve block control oil passage is the top shaft oil inlet, and the oil passage outlet is the control oil outlet.

[0015] The oil passage inlet of the valve block working oil passage is the top shaft oil inlet, and the oil passage outlet is the working oil outlet.

[0016] The oil passage inlet of the valve block lubricating oil passage is the lubricating oil inlet, and the oil passage outlet is the working oil outlet.

[0017] The oil passage inlet of the sliding block return oil passage is the oil leakage port of each valve block, and the oil passage outlet is the return oil port.

[0018] Preferably, each valve group is used to realize the on-off of the main oil passage; the valve group specifically comprises a first electromagnetic valve, a pressure reducing valve, a second electromagnetic valve, a small flow speed regulating valve group, a first check valve, a third electromagnetic valve, a large flow speed regulating valve group, a second check valve, a third check valve, and a throttle valve.

[0019] The first electromagnetic valve is used to control the on-off of the valve block control oil passage; the third electromagnetic valve is used to control the on-off of the valve block working oil passage; and the third check valve is used to control the on-off of the valve block lubricating oil passage.

[0020] The second electromagnetic valve is used for switching the static / dynamic input working condition of the turning gear; the small-flow speed regulating valve group is used for regulating the working oil flow in the static input working condition of the turning gear; and the large-flow speed regulating valve group is used for regulating the working oil flow in the dynamic input working condition of the turning gear.

[0021] The pressure reducing valve is used for regulating the control oil pressure of the turning gear; the first and second check valves are used for preventing the backflow of oil; and the throttle valve is used for regulating the lubricating flow.

[0022] Preferably, the small-flow speed regulating valve group is composed of a speed regulating valve, and the adjustable flow range is 0.5-50 L / min.

[0023] Preferably, the large-flow speed regulating valve group is composed of a proportional throttle valve and a pressure compensator, and the adjustable flow range is 30-500 L / min.

[0024] Preferably, in the static input working condition of the turning gear, the working conditions of each valve group include:

[0025] The pressure reducing valve is adjusted to keep the turning gear oil pressure as the required control oil pressure of the internal clutch of the turning gear, and the small-flow speed regulating valve group is adjusted to keep the flow corresponding to the gear rotation speed of 1-3 r / min.

[0026] After receiving the static input instruction of the turning gear, the first electromagnetic valve is powered on, the valve block control oil circuit keeps open, and the top shaft oil enters the internal clutch of the turning gear through the valve block control oil circuit.

[0027] The second electromagnetic valve is powered off to switch to the static input working condition of the turning gear; the third electromagnetic valve is powered on, the valve block working oil circuit keeps open, the top shaft oil is regulated by the small-flow speed regulating valve group, the clutch slipper is driven to rotate at a speed of 1-3 r / min, the control oil pushes the turning clutch to engage, and the static input process of the turning gear is completed.

[0028] Preferably, in the dynamic input working condition of the turning gear, the working conditions of each valve group include:

[0029] After receiving the dynamic input instruction of the turning gear, the first electromagnetic valve is powered on, the valve block control oil circuit keeps open, and the top shaft oil enters the internal clutch of the turning gear through the valve block control oil circuit.

[0030] The second electromagnetic valve is powered on to switch to the dynamic input working condition of the turning gear; the third electromagnetic valve is powered on, the valve block working oil circuit keeps open, and no oil backflow occurs, the top shaft oil is regulated by the large-flow speed regulating valve group, the large-flow speed regulating valve group adjusts the working oil flow according to the motor speed feedback signal, the working oil drives the hydraulic motor to speed up and keep at the rated speed of the motor; when the rotor slows down to the rated speed of the turning gear, the control oil pushes the turning clutch to engage, and the dynamic input process of the turning gear is completed.

[0031] Preferably, the working conditions of each valve group under the disc wheel parking shutdown working condition include:

[0032] The adjusting throttle valve is adjusted to keep the flow rate corresponding to the hydraulic motor rotation speed of 1-3 r / min;

[0033] When the disc wheel is in the disengaged state and the disc wheel parking shutdown instruction is received, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are powered off, the valve block control oil way and the valve block working oil way are disconnected, the pressure of the valve block working oil way is lower than the pressure of the valve block lubricating oil way, the third one-way valve is opened, and the lubricating oil enters the hydraulic motor through the valve block lubricating oil way to drive the hydraulic motor to rotate in the rotation speed range of 1-3 r / min.

[0034] Preferably, the top shaft oil in the valve block control oil way is used to control the engagement and disengagement of the internal clutch of the disc wheel and provide lubricating oil for the internal transmission shaft system of the disc wheel device.

[0035] Preferably, the valve block working oil way includes a static disc wheel working oil way and a dynamic disc wheel working oil way.

[0036] The top shaft oil in the static disc wheel working oil way is used to provide the hydraulic motor with working oil with controllable flow rate under the static disc wheel input working condition, so as to control the rotation speed of the hydraulic motor.

[0037] The top shaft oil in the dynamic disc wheel working oil way is used to provide the hydraulic motor with working oil with controllable flow rate under the dynamic disc wheel input working condition, so as to control the rotation speed of the hydraulic motor.

[0038] Preferably, the lubricating oil in the valve block lubricating oil way is used to continuously supply the hydraulic motor with lubricating oil when the disc wheel device is shut down.

[0039] The control valve block for the liquid-controlled automatic disc wheel device provided by the application can provide the liquid-controlled automatic disc wheel device with working oil with controllable flow rate, control oil with controllable pressure and shutdown lubricating oil according to different use conditions, accurately control the rotation speed of the hydraulic motor and prevent the motor from being stuck, ensure the smoothness and rapidity of the disc wheel input, improve the working efficiency and reliability of the disc wheel, and has high control precision for the rotation speed of the disc wheel device. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a working principle schematic diagram of the control valve block for the liquid-controlled automatic disc wheel device in the static disc wheel input working condition.

[0041] Figure 2 is a working principle schematic diagram of the control valve block for the liquid-controlled automatic disc wheel device in the dynamic disc wheel input working condition.

[0042] Figure 3This is a schematic diagram illustrating the working principle of the control valve block for the hydraulically controlled automatic turning device described in this invention under the condition of turning machine shutdown. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0046] Example 1:

[0047] The following is combined with Figures 1-3 This embodiment describes a control valve block for a hydraulically controlled automatic turning device, which includes two oil inlets and three oil outlets, forming four main oil circuits between the oil inlets and oil outlets.

[0048] The two oil inlets are the jacking oil inlet and the lubricating oil inlet; the jacking oil inlet is connected to the jacking oil circuit of the unit, and the lubricating oil inlet is connected to the lubricating oil circuit of the unit.

[0049] The three oil outlets are a control oil outlet, a working oil outlet, and a return oil outlet; the control oil outlet is connected to the internal clutch of the turning gear, the working oil outlet is connected to the hydraulic motor inlet, and the return oil outlet is connected to the unit's return oil circuit.

[0050] The four main oil circuits are the valve block control oil circuit, the valve block working oil circuit, the valve block lubrication oil circuit, and the slider return oil circuit.

[0051] The oil inlet of the valve block control oil circuit is the top shaft oil inlet, and the oil outlet is the control oil outlet;

[0052] The oil inlet of the valve block working oil circuit is the top shaft oil inlet, and the oil outlet is the working oil outlet;

[0053] The oil inlet of the valve block lubrication circuit is the lubricating oil inlet, and the oil outlet is the working oil outlet;

[0054] The oil inlet of the slider return oil circuit is the drain port of each valve block, and the oil outlet is the return port.

[0055] Furthermore, the main oil circuit is opened and closed using various valve groups; each valve group specifically includes: a first solenoid valve 10, a pressure reducing valve 20, a second solenoid valve 30, a small flow speed regulating valve group 40, a first check valve 50, a third solenoid valve 60, a large flow speed regulating valve group 70, a second check valve 80, a third check valve 90, and a throttle valve 100.

[0056] The first solenoid valve 10 is used to control the opening and closing of the valve block control oil circuit; the third solenoid valve 60 is used to control the opening and closing of the valve block working oil circuit; the third check valve 90 is used to control the opening and closing of the valve block lubrication oil circuit.

[0057] The second solenoid valve 30 is used to switch between static and dynamic operating conditions of the turning gear; the small flow rate regulating valve group 40 is used to regulate the working oil flow rate under static operating conditions of the turning gear; the large flow rate regulating valve group 70 is used to regulate the working oil flow rate under dynamic operating conditions of the turning gear.

[0058] Pressure reducing valve 20 is used to regulate the control oil pressure of the turning gear; first check valve 50 and second check valve 80 are used to prevent oil backflow; throttle valve 100 is used to regulate the lubrication flow.

[0059] Furthermore, the small flow rate regulating valve group 40 is composed of a regulating valve, and the adjustable flow rate range is 0.5 to 50 L / min;

[0060] The high-flow-rate regulating valve group 70 is composed of a proportional throttle valve and a pressure compensator, and the adjustable flow range is 30 to 500 L / min.

[0061] Furthermore, under the static commissioning condition of the turning gear, the working status of each valve group includes:

[0062] Adjust the pressure reducing valve 20 until the bar gear oil pressure is maintained at the control oil pressure required by the internal clutch of the bar gear, and adjust the small flow speed regulating valve group 40 until the flow rate is maintained at the flow rate corresponding to the speed of the clutch slip gear at 1 to 3 r / min.

[0063] Upon receiving the static engagement command of the turning gear, the first solenoid valve 10 is energized, the valve block control oil circuit is kept open, and the top shaft oil enters the clutch inside the turning gear through the valve block control oil circuit.

[0064] The second solenoid valve 30 is de-energized, switching to the static engagement condition of the turning gear; the third solenoid valve 60 is energized, the working oil circuit of the valve block remains open, the jacking oil is regulated by the small flow speed regulating valve group 40, driving the clutch sliding parts to operate in the speed range of 1 to 3 r / min, and the control oil pushes the turning gear clutch to engage, completing the static engagement process of the turning gear.

[0065] Furthermore, under dynamic operating conditions of the turning gear, the working status of each valve group includes:

[0066] Upon receiving the dynamic engagement command of the turning gear, the first solenoid valve 10 is energized, the valve block control oil circuit is kept open, and the top shaft oil enters the clutch inside the turning gear through the valve block control oil circuit.

[0067] When the second solenoid valve 30 is energized, the operation mode of the turning gear is switched to dynamic engagement. When the third solenoid valve 60 is energized, the working oil circuit of the valve block remains open and there is no oil backflow. The jacking oil flow rate is regulated by the high-flow speed regulating valve group 70. The high-flow speed regulating valve group 70 adjusts the working oil flow rate according to the motor speed feedback signal until the working oil drives the hydraulic motor to speed up and maintain the motor at its rated speed. When the rotor speed decreases to the rated speed of the turning gear, the control oil pushes the turning gear clutch to engage, completing the dynamic engagement process of the turning gear.

[0068] Furthermore, under the condition of the turning gear stopping, the working status of each valve group includes:

[0069] Adjust the throttle valve to 100 until the flow rate is maintained at the flow rate corresponding to the hydraulic motor speed of 1-3 r / min;

[0070] When the turning gear is in the disengaged state, upon receiving the turning gear stop command, the first solenoid valve 10, the second solenoid valve 30, and the third solenoid valve 60 are de-energized, and both the valve block control oil circuit and the valve block working oil circuit are disconnected. The pressure in the valve block working oil circuit is lower than the pressure in the valve block lubrication oil circuit, and the third check valve 90 opens. The lubricating oil enters the hydraulic motor through the valve block lubrication oil circuit, driving the hydraulic motor to operate within the speed range of 1 to 3 r / min.

[0071] Furthermore, the valve block controls the top shaft oil in the oil circuit to control the engagement and disengagement of the clutch inside the turning gear, and provides lubricating oil to the transmission shaft system inside the turning gear device.

[0072] Furthermore, the valve block working oil circuit includes a static turning working oil circuit and a dynamic turning working oil circuit;

[0073] The jacking oil in the static turning working oil circuit is used to provide the hydraulic motor with controllable flow working oil under the static turning working condition, thereby controlling the speed of the hydraulic motor;

[0074] The jacking oil in the dynamic turning working oil circuit is used to provide the hydraulic motor with controllable flow of working oil under the dynamic turning operation condition, thereby controlling the speed of the hydraulic motor.

[0075] Furthermore, the lubricating oil in the valve block lubrication circuit is used to continuously supply lubricating oil to the hydraulic motor when the turning device stops.

[0076] In this invention, the hydraulically controlled automatic turning gear control valve block has two inlets: a top shaft oil inlet and a lubricating oil inlet; and three outlets: a control oil outlet, a working oil outlet, and a return oil outlet. The valve block's top shaft oil inlet is connected to the unit's top shaft oil circuit (high-pressure oil circuit), the valve block's lubricating oil inlet is connected to the unit's lubricating oil circuit (low-pressure oil circuit), the valve block's control oil outlet is connected to the turning gear's internal clutch, the valve block's working oil outlet is connected to the hydraulic motor's oil inlet, and the valve block's return oil outlet is connected to the unit's return oil circuit. The control valve block internally forms four main oil circuits: a control oil circuit, a working oil circuit, a lubricating oil circuit, and a return oil circuit. The inlets, outlets, and functions of each main oil circuit of the control valve are shown in Table 2.

[0077] Table 2

[0078]

[0079] The hydraulically controlled automatic turning gear's control valve block contains multiple solenoid valves, check valves, pressure reducing valves, and small-flow and large-flow speed regulating valve assemblies. The on / off state of the working oil circuit, control oil circuit, and switching between static and dynamic turning oil circuits are achieved by controlling the energization and de-energization of each solenoid valve. The control valve block's working oil circuit is divided into a static turning oil circuit and a dynamic turning oil circuit. The static turning oil circuit is equipped with a small-flow speed regulating valve assembly, which consists of speed regulating valves and can significantly throttle flow and achieve relatively precise flow regulation within a small flow range (0.5–50 L / min). The dynamic turning oil circuit is equipped with a large-flow speed regulating valve assembly, which consists of high-precision speed regulating valves and can achieve relatively precise flow regulation within a larger flow range (30–500 L / min). This design ensures accurate control of the hydraulic motor speed when the turning gear is engaged under both static and dynamic rotor conditions. The control valve block's control oil circuit is connected to the high-pressure generator jacking oil. A pressure reducing valve lowers the pressure to the control oil pressure required for clutch operation, ensuring stable and controllable control oil pressure. The control valve block's lubrication oil circuit is equipped with a check valve and a throttle valve. After adjusting the lubricating oil flow rate according to usage requirements, it can continuously supply lubricating oil to the hydraulic motor even when the turning gear is stopped, preventing motor jamming during turning.

[0080] The control valve block of the hydraulically controlled automatic turning gear mainly consists of solenoid valve 10, pressure reducing valve 20, solenoid valve 30, small flow speed regulating valve group 40, check valve 50, solenoid valve 60, large flow speed regulating valve group 70, check valve 80, check valve 90, throttle valve 100, and corresponding pipelines. Solenoid valve 10 controls the on / off state of the control oil circuit; pressure reducing valve 20 regulates the turning gear control oil pressure; solenoid valve 30 switches between static and dynamic turning gear operation; solenoid valve 60 controls the on / off state of the working oil circuit; small flow speed regulating valve group 40, composed of speed regulating valves, precisely regulates the working oil flow rate under static turning gear operation; large flow speed regulating valve group 70, composed of a proportional throttle valve and a pressure compensator, precisely regulates the working oil flow rate under dynamic turning gear operation; check valve 90 controls the on / off state of the lubricating oil circuit; throttle valve 100 regulates the lubrication flow rate; and check valves 50 and 80 prevent oil backflow.

[0081] Figure 1 This describes the working status of each valve group within the control valve block under static commissioning conditions for the turning gear. During commissioning, the pressure reducing valve 20 is pre-adjusted until the oil pressure is maintained at the control oil pressure required by the internal clutch of the turning gear; the small flow rate regulating valve group 40 is adjusted to maintain its flow rate at the corresponding flow rate when the speed of the clutch slip gear is 1-3 r / min. When the system issues a static commissioning command, the solenoid valve 10 in the control valve block is energized, the turning gear control oil circuit is unblocked, and the unit's top shaft oil enters the internal clutch of the turning gear through the control oil circuit; the solenoid valve 30 is de-energized, switching to the static turning gear condition; the solenoid valve 60 is energized, the static turning gear working oil circuit is unblocked, and the unit's top shaft oil flows through the pre-set small flow rate regulating valve group 40, driving the clutch slip part to operate within the speed range of 1-3 r / min according to the required flow rate. After the control oil pushes the turning gear clutch to engage, the static commissioning process of the turning gear is completed.

[0082] Figure 2 This section describes the control valve block's operation status under dynamic and continuous turning gear operation conditions. When the system issues a dynamic engagement command, solenoid valve 10 within the control valve block is energized, ensuring unobstructed turning gear control oil circuit. The unit's jacking oil enters the turning gear's internal clutch via the control oil circuit. Solenoid valve 30 is energized, switching to dynamic turning gear operation. Solenoid valve 60 is energized, ensuring unobstructed dynamic turning gear working oil circuit with no oil backflow. The unit's jacking oil flows through the high-flow-rate speed-regulating valve group 80. The valve group automatically adjusts the working oil flow based on the motor speed feedback signal until the working oil drives the hydraulic motor to increase speed and maintain it at the motor's rated speed. When the rotor speed decreases to the turning gear's rated speed, the control oil pushes the clutch to engage, completing the dynamic turning gear engagement process. After dynamic engagement, the high-flow-rate speed-regulating valve group 80 automatically adjusts the working oil flow based on the rotor speed feedback signal, ensuring the turning gear drives the rotor to continuously operate at the rated speed.

[0083] Figure 3This describes the operating status of each valve group within the control valve block under the condition of turning gear shutdown. During commissioning, throttle valve 100 is pre-adjusted to maintain its flow rate at the level corresponding to a hydraulic motor speed of 1-3 r / min. With the turning gear in the disengaged state, when the system issues a turning gear shutdown command, control solenoid valves 10, 30, and 60 are de-energized. At this time, both the control oil circuit and the working oil circuit of the valve block are disconnected. The working oil circuit pressure is lower than the lubrication oil circuit pressure, and the one-way valve 90 opens. The unit's lubricating oil flows through the control valve block to lubricate and enter the hydraulic motor, driving the motor to continuously operate at 1-3 r / min, preventing jamming during restart.

[0084] The jacking oil flows into the valve block control oil circuit, which is used to control the engagement and disengagement of the clutch inside the turning gear and to provide lubricating oil to the transmission shaft system inside the turning gear. The jacking oil flows into the valve block working oil circuit, which is further divided into a static turning gear working oil circuit and a dynamic turning gear working oil circuit. These circuits are used to provide controllable flow working oil to the hydraulic motor under static and dynamic turning gear conditions, respectively, thereby precisely controlling the speed of the hydraulic motor. The lubricating oil from the generator flows into the valve block lubrication oil circuit, which is used to continuously supply lubricating oil to the hydraulic motor when the turning gear is stopped.

[0085] The valve block control oil circuit is equipped with a solenoid valve 10 for controlling the on / off state of the control oil circuit, and a pressure reducing valve 20 for regulating the control oil pressure; the valve block main working oil circuit is equipped with a solenoid valve 30 for switching between static / dynamic turning operation, and a solenoid valve 60 for controlling the on / off state of the main working oil circuit; the valve block static turning working oil circuit is equipped with a small flow rate regulating valve group 40, which consists of regulating valves and can significantly throttle the flow and achieve relatively precise flow regulation within a small flow range (0.5~50L / min); the valve block dynamic turning working oil circuit is equipped with a large flow rate regulating valve group 70, which consists of high-precision regulating valves and can achieve relatively precise flow regulation within a large flow range (30~500L / min); the valve block static and dynamic working oil circuits are respectively equipped with check valves 50 and 80 to prevent oil backflow; the valve block lubrication oil circuit is equipped with a check valve 90 for controlling the on / off state of the lubrication oil circuit, and a throttle valve 100 for regulating the lubrication flow.

[0086] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A control valve block for a hydraulic controlled automatic jacking gear, characterized in that, It comprises: Two oil inlets and three oil outlets, forming four main oil paths between the oil inlets and the oil outlets; The two oil inlets are a top shaft oil inlet and a lubricating oil inlet; the top shaft oil inlet is communicated with the top shaft oil path of the unit, and the lubricating oil inlet is communicated with the lubricating oil path of the unit; The three oil outlets are a control oil outlet, a working oil outlet and a return oil port; the control oil outlet is communicated with the internal clutch of the turning gear, the working oil outlet is communicated with the oil inlet of the hydraulic motor, and the return oil port is communicated with the return oil path of the unit; The four main oil paths are a valve block control oil path, a valve block working oil path, a valve block lubricating oil path and a sliding block return oil path; The oil path inlet of the valve block control oil path is the top shaft oil inlet, and the oil path outlet is the control oil outlet; The oil path inlet of the valve block working oil path is the top shaft oil inlet, and the oil path outlet is the working oil outlet; The oil path inlet of the valve block lubricating oil path is the lubricating oil inlet, and the oil path outlet is the working oil outlet; The oil path inlet of the sliding block return oil path is the oil discharge port of each valve block, and the oil path outlet is the return oil port; Each valve group is adopted to realize the on-off of the main oil path; the valve group specifically comprises: a first electromagnetic valve (10), a pressure reducing valve (20), a second electromagnetic valve (30), a small flow speed regulating valve group (40), a first check valve (50), a third electromagnetic valve (60), a large flow speed regulating valve group (70), a second check valve (80), a third check valve (90) and a throttle valve (100); The first electromagnetic valve (10) is used to control the on-off of the valve block control oil path; the third electromagnetic valve (60) is used to control the on-off of the valve block working oil path; and the third check valve (90) is used to control the on-off of the valve block lubricating oil path; The second electromagnetic valve (30) is used to switch the static / dynamic input working condition of the turning gear; the small flow speed regulating valve group (40) is used to adjust the working oil flow under the static input working condition of the turning gear; and the large flow speed regulating valve group (70) is used to adjust the working oil flow under the dynamic input working condition of the turning gear; The pressure reducing valve (20) is used to adjust the control oil pressure of the turning gear; the first check valve (50) and the second check valve (80) are used to prevent the backflow of oil; and the throttle valve (100) is used to adjust the lubricating flow; The small flow speed regulating valve group (40) is composed of a speed regulating valve, and the adjustable flow range is 0.5-50 L / min; The large flow speed regulating valve group (70) is composed of a proportional throttle valve and a pressure compensator, and the adjustable flow range is 30-500 L / min.

2. The control valve block for the hydraulic controlled automatic wheel turning device according to claim 1, wherein Under the static input working condition of the turning gear, the working conditions of each valve group include: Adjusting the pressure reducing valve (20) to keep the oil pressure of the turning gear as the control oil pressure required by the internal clutch of the turning gear, and adjusting the small flow speed regulating valve group (40) to keep the flow at the corresponding flow when the rotating speed of the clutch sliding gear is 1-3 r / min; After receiving the static input instruction of the turning gear, the first electromagnetic valve (10) is energized, the valve block control oil path keeps open, and the top shaft oil enters the internal clutch of the turning gear through the valve block control oil path; The second electromagnetic valve (30) is powered off, and is switched to the static input working condition of the turning gear; the third electromagnetic valve (60) is powered on, the valve block working oil circuit is kept open, the top shaft oil is adjusted in flow by the small-flow speed regulating valve group (40), the clutch sliding part is driven to rotate in the speed range of 1-3 r / min, the control oil pushes the turning gear clutch to engage, and the static input process of the turning gear is completed.

3. The control valve block for the hydraulic controlled automatic wheel turning device according to claim 1, wherein In the dynamic input working condition of the turning gear, the working conditions of each valve group include: After receiving the dynamic input instruction of the turning gear, the first electromagnetic valve (10) is powered on, the valve block control oil circuit is kept open, the top shaft oil enters the internal clutch of the turning gear through the valve block control oil circuit; The second electromagnetic valve (30) is powered on, and is switched to the dynamic input working condition of the turning gear; the third electromagnetic valve (60) is powered on, the valve block working oil circuit is kept open, and there is no oil backflow phenomenon, the top shaft oil is adjusted in flow by the large-flow speed regulating valve group (70), the large-flow speed regulating valve group (70) adjusts the working oil flow according to the motor speed feedback signal, until the working oil drives the hydraulic motor to speed up, and is kept at the rated speed of the motor; when the rotor is reduced to the rated speed of the turning gear, the control oil pushes the turning gear clutch to engage, and the dynamic input process of the turning gear is completed.

4. The control valve block for the hydraulic controlled automatic wheel turning device according to claim 1, wherein In the turning gear shutdown working condition, the working conditions of each valve group include: The adjusting throttle valve (100) is adjusted to keep the flow at the corresponding flow when the hydraulic motor speed is 1-3 r / min; When the turning gear is in the disengaged state, after receiving the turning gear shutdown instruction, the first electromagnetic valve (10), the second electromagnetic valve (30) and the third electromagnetic valve (60) are powered off, the valve block control oil circuit and the valve block working oil circuit are disconnected, the pressure of the valve block working oil circuit is lower than the pressure of the valve block lubricating oil circuit, the third one-way valve (90) is opened, the lubricating oil enters the hydraulic motor through the valve block lubricating oil circuit, and the hydraulic motor is driven to rotate in the speed range of 1-3 r / min.

5. The control valve block for the hydraulic controlled automatic wheel turning device according to any one of claims 1-4, characterized in that, The top shaft oil in the valve block control oil circuit is used for controlling the engagement and disengagement of the internal clutch of the turning gear, and providing lubricating oil for the internal transmission shaft system of the turning gear device.

6. The control valve block for the hydraulic controlled automatic wheel turning device according to any one of claims 1-4, wherein The valve block working oil circuit includes a static turning gear working oil circuit and a dynamic turning gear working oil circuit; The top shaft oil in the static turning gear working oil circuit is used for providing working oil with controllable flow for the hydraulic motor in the static input working condition of the turning gear, so as to control the speed of the hydraulic motor. The top shaft oil in the dynamic turning gear working oil circuit is used for providing working oil with controllable flow for the hydraulic motor in the dynamic input working condition of the turning gear, so as to control the speed of the hydraulic motor.

7. The control valve block for the hydraulic controlled automatic wheel turning device according to any one of claims 1 to 4, wherein The lubricating oil in the valve block lubricating oil circuit is used for continuously supplying lubricating oil for the hydraulic motor when the turning gear device is shutdown.

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