787 results about "Directional Valve" patented technology

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a first inlet check valve configured to permit fluid flow into the first chamber, a second inlet check valve configured to permit fluid flow into the third chamber, a directional control valve (DCV) repositionable between (a) a first position where the DCV is configured to fluidly couple the second chamber to a high pressure fluid source and (b) a second position where the DCV is configured to fluidly couple the fourth chamber to the high pressure fluid source, and a relief valve configured to supply a fluid to the DCV through an orifice to move the DCV.

Disclosed is a hydraulic control system for safe rapid opening or closing of a valve. The hydraulic control system comprises a hydraulic cylinder (71), a pressure oil line (141), an oil return line (151), an oil drain line (161), a quick oil return line (171) and a valve manifold (181), wherein the inside of the valve manifold is provided with a three-position four-way directional control valve (51), a bidirectional hydraulic lock (31), a first two-position four-way directional control valve (61) and an energy accumulator (191); a first cartridge valve (101) is connected between the oil drain line and a rod cavity of the hydraulic cylinder, and a pilot port of the first cartridge valve is connected to a port A of the first two-position four-way valve; an oil inlet of the energy accumulator is connected to each of the pressure oil line and the oil return line, a first check valve (81) is connected between the oil inlet of the energy accumulator and the pressure oil line, and a second cartridge valve (102) is connected between the first check valve and the energy accumulator; and the second cartridge valve is connected to a rodless cavity of the hydraulic cylinder, and a pilot port of the second cartridge valve is connected to the port A of the first two-position four-way directional control valve. The hydraulic control system for safe rapid opening or closing of a valve allows for safe rapid opening or closing of a valve.

A bi-directional valve with valve elements having compliant features biasing them together to maintain a sealing interface that defines a fluid communication barrier within the valve. Parting the valve elements from one another removes the sealing interface allow fluid communication across the valve elements. The valve includes a side port and a choke member that selectively blocks fluid flow through the valve when moved adjacent the side port and selectively opens the valve to fluid communication when moved away from the side port. The choke member remains adjacent the side port until the valve elements are spaced a distance apart greater than that at which valve erosion or fluid cavitation occurs. Also included with the valve are systems for counterbalancing forces exerted onto the valve from differential pressures.

The invention relates to the technical field of electromagnetic directional valve control, and discloses an electromagnetic directional valve remote control system and a data processing method, and the system comprises a control instruction receiving and analyzing module, a dynamic response parameter determining module, a state data collecting and uploading module, a state data analyzing module and a control signal executing module. The method comprises the following steps: receiving a remote terminal reversing control instruction, and analyzing the instruction into adjustment parameters such as action times, switching directions and pressure thresholds; determining dynamic response parameters of a control node based on the parameters, executing adjustment, and collecting state data such as current and magnetic flux; uploading the data to an edge calculation unit, and generating a pulse width modulation correction value of the first control node through data fusion, frequency domain correlation analysis, wavelet domain dynamic compensation aggregation and other processing; and the parameters are transmitted to the fuzzy controller to calibrate the driving circuit parameters. The method improves the remote control precision and stability, and is suitable for industrial automatic intelligent control.

The utility model relates to the field of hydraulic servo systems, and discloses a safety valve group for a hydraulic servo system, which comprises a valve block and is characterized in that a servo valve is mounted on the upper surface of the valve block, and a first fully-adjustable throttle valve is mounted on the upper surface of the valve block close to the left end of the servo valve. A second full-adjustment type throttling valve is installed at the position, close to the right end of the servo valve, of the upper surface of the valve block, an electromagnetic direction valve is installed on the upper surface of the valve block, a first balance type normally-open logic valve is installed on the left surface of the valve block, and a first balance type normally-closed logic valve is installed on the left surface of the valve block. And a second balance type normally-closed logic valve is mounted on the right surface of the valve block. According to the utility model, by adopting a new oil way design, the whole device has the advantages of simple structure, small valve body size, safety, reliability and the like, and meanwhile, the whole device can take pressure relief protection measures on a system in time according to working conditions, so that the safety of system equipment and operators is guaranteed.

The utility model discloses a hydraulic control system, which relates to the technical field of hydraulic control and comprises an oil tank, a hydraulic pump, a main cylinder, a first electromagnetic plug-in mounting direction valve, a second electromagnetic plug-in mounting direction valve and a third electromagnetic plug-in mounting direction valve. The main oil supply path is communicated with a rapid cavity of the main cylinder through a first electromagnetic plug-in mounting direction valve, the main oil supply path is communicated with a lower cavity of the main cylinder through a second electromagnetic plug-in mounting direction valve, the main oil supply path is communicated with an upper cavity of the main cylinder through a third electromagnetic plug-in mounting direction valve, and the upper cavity, the lower cavity and the rapid cavity of the main cylinder are all communicated with an oil tank through an oil return path; sliding valve control of a conventional hydraulic machine is replaced by cartridge valve control, the hydraulic machine is simple in structure and stable in performance, can be widely applied to the fields of game coins, souvenir medal, medal and the like, brings considerable benefits, and can adjust the drift diameter of corresponding cartridge valve combination parts according to actual conditions so as to improve the application range.

The invention discloses an unmanned mine car front and rear wheel synchronous steering system which comprises a car frame, a front steering axle and a rear steering axle, and the front steering axle and the rear steering axle are installed on a car and control steering through a steering system. The steering system comprises a front axle working cylinder, a front axle driven cylinder, a rear axle working cylinder and a rear axle driven cylinder, the front axle working cylinder and the front axle driven cylinder control front wheels of a vehicle to rotate, the rear axle working cylinder and the rear axle driven cylinder control rear wheels of the vehicle to rotate, and cavities of the front axle working cylinder and the rear axle working cylinder are communicated with a working port A and a working port B of a three-position four-way reversing valve through pipelines respectively. Cavities of the front axle driven cylinder and the rear axle driven cylinder are communicated through a valveless rigid connecting pipeline to form a rigid series oil way, and in the rigid series oil way, the amount of oil discharged by the front wheel working cylinder and the front axle driven cylinder is equal to the amount of oil received by the rear wheel working cylinder and the rear axle driven cylinder. Mechanical hydraulic synchronization of steering angles of front and rear wheels of the vehicle is realized, delay and fault risks of dependence on sensors are eliminated, and high-reliability rigid synchronization is realized.

The invention relates to the technical field of valves, and discloses a two-position four-way reversing valve which comprises a double-spliced valve body and a hydraulic pushing device. Two hydraulic cavities which are communicated with each other are formed in the double-spliced valve body, a valve element is arranged in each hydraulic cavity, and a through hole which extends axially is formed in each valve element; a liquid inlet, a liquid return opening and a liquid outlet which are communicated with the hydraulic cavity are formed in the double-spliced valve body; the valve element is sleeved with a valve sleeve, a first flow channel is formed in the position, opposite to the liquid inlet, of the valve sleeve, and a second flow channel is formed in the position, opposite to the liquid return opening, of the valve sleeve. By arranging the valve sleeve outside the valve element, inlet and outlet liquid can flow through the first flow channel or the second flow channel firstly, so that the effective flow area of high-pressure liquid entering the cavity of the double-spliced valve body from the liquid inlet is remarkably increased, and the flow of the inlet and outlet liquid is remarkably increased; and the reliability and the response speed of position switching of the valve element in the valve cavity are ensured.

The application provides a two-position five-way pneumatic reversing valve, and relates to the technical field of hydraulic control valves.The valve body is provided with a first air outlet hole, an air hole and a second air outlet hole from left to right on the lower side, and the inner cavity of the valve body is provided with a valve core.The left end of the valve body is provided with a front baffle, and the right side of the valve body is provided with a piston assembly, which is in contact with the right end surface of the valve core.The valve body is provided with a first annular protrusion, a second annular protrusion, a third annular protrusion, a fourth annular protrusion and a fifth annular protrusion corresponding to each hole.The outer side of the air hole is provided with a plug A, and the air hole is connected with the piston assembly through a pipeline arranged in the valve body.The pipeline is internally provided with a plug B.The electromagnetic structure of the application is integrated, and the parts have better coaxiality during production and assembly, effectively ensuring the service life of the product and the extremely low product failure rate.Compared with the existing split structure, the application has higher electromagnetic conversion efficiency and can effectively reduce the power consumption of the product.

The utility model discloses a control system of a transverse skin stretching pitching mechanism, which belongs to the technical field of skin stretching hydraulic machines and comprises a proportional servo valve, one end of the proportional servo valve is communicated with an oil tank, and the other end of the proportional servo valve is communicated with a counterbalance element. A check element is arranged between the proportional servo valve and the counterbalance element, one side of the check element is communicated with an electromagnetic reversing valve, the electromagnetic reversing valve is communicated with an oil tank, the counterbalance element is respectively communicated with a safety valve and a leak-free valve, one side of the leak-free valve is communicated with a supporting valve, and the supporting valve is communicated with the oil tank. A pressure sensing element and a shock-proof sensing element are further installed on one side of the counterbalance element, three stretch forming processes are provided for a pitching mechanism of the transverse skin stretch hydraulic press, and the use requirements of users for high efficiency and high quality are met.

A directional control valve provided with a plurality of external flow channel ports for fluid entry and exit. A flow channel switching assembly is further arranged inside the directional control valve and configured to provide different internal flow channels in different switching positions, so as to connect different external flow channel ports. The flow channel switching assembly comprises: a movable valve member (121), which is provided with a plurality of movable valve member flow channels (1211), wherein at least one movable valve member flow channel penetrates the body of the movable valve member and connects different external flow channel ports located on two sides of the movable valve member; and a fixed valve member (122), which is provided with a plurality of fixed valve member flow channels, wherein the movable valve member abuts against the fixed valve member; the movable valve member can be driven to rotate around a first axis to switch positions; and in the different switching positions, different movable valve member flow channels and fixed valve member flow channels form different internal flow channels so as to connect different external flow channel ports.

The utility model discloses a control device capable of adjusting hanging height through flow. The control device comprises a posture controller, a hanging control box, a flow meter, a stop valve and a hanging executing mechanism. The suspension actuating mechanism comprises a pneumoelectric valve, an electromagnetic directional valve, a power cylinder and a pressure accumulator, the high-pressure air source is connected with the power cylinder through the pneumoelectric valve, the hydraulic source is connected with the power cylinder after sequentially passing through the electromagnetic directional valve, the stop valve, the flowmeter and the pressure accumulator, and the posture controller is electrically connected with the pneumoelectric valve, the electromagnetic directional valve and the suspension control box. The suspension control box is electrically connected with the stop valve and the flow valve. The suspension device of the special vehicle solves the problem that a driver is inconvenient to operate when the vehicle normally lands ashore or lands a naval vessel due to the fact that the suspension device of the existing special vehicle cannot feed back position information during adjustment, and the use safety is improved; meanwhile, preset height adjustment of the vehicle suspension device is achieved, then preset adjustment of the distance between the vehicle bottom and the ground is achieved, and the operation difficulty of a driver is lowered.

The invention provides a coal mill oil way plate and a reversing control device thereof, and relates to the technical field of coal mill oil way plates, the coal mill oil way plate comprises a valve block body, a proportional overflow valve, a duplex electromagnetic reversing valve group, a working oil way group, two hydraulic control one-way valve groups, two energy accumulators, a safety overflow valve, an online particle counter and a spiral cooling flow channel. The redundancy design of the duplex electromagnetic directional valve group improves the reliability of the system, so that the system can still be operated when a single valve fails, the hydraulic control one-way valve group realizes mechanical locking of an oil cylinder and can prevent a grinding roller from falling off during power failure, and the energy accumulator is connected with a working oil duct through a connector to absorb pressure impact and compensate leakage, so that the stability of loading pressure is maintained, and the reliability of the system is improved. The on-line particle counter gives an early warning of oil pollution in real time, hydraulic faults can be reduced, the spiral cooling flow channel is matched with the semiconductor temperature control piece to adjust the oil temperature, and the problem of pressure drift caused by oil viscosity fluctuation under high and low temperature working conditions is solved.

The present invention discloses a control valve and hydraulic system for distributed drive, wherein the control valve includes: a plurality of valve plates connected in sequence, each valve plate includes a three-position six-way directional valve, a first one-way valve, a second one-way valve, a pressure compensating valve, a series-parallel selection valve, a PA oil circuit, a PB oil circuit, and an LS oil circuit. The first working oil port of the series-parallel selection valve is connected to the oil port B of the three-position six-way directional valve, the second working oil port is connected to the three-position six-way directional valve of the adjacent valve plate, the third working oil port is connected to the second oil port, and the fourth working oil port is connected to the first oil port of the adjacent valve plate. The PA oil circuit and PB oil circuit of the control valve can withstand high-pressure alternating oil inlet and return, and the oil flows in both directions. The pressure compensating valve in the valve plate can perform post-valve pressure compensation control on any oil inlet. In addition, the control valve is also equipped with a series-parallel selection valve, which can realize the series, parallel, and mixed switching of the motor as needed.

The utility model relates to the technical field of electro-hydraulic directional control valves, in particular to an electro-hydraulic directional control valve sealing structure which comprises an electro-hydraulic directional control valve body, a hydraulic control directional control valve and an oil cylinder, coils are arranged at the two ends of the inner side of the electro-hydraulic directional control valve body, and the hydraulic control directional control valve is arranged on the surface of the bottom end of the electro-hydraulic directional control valve body. Iron nuts are arranged on the surfaces of the two ends of the hydraulic control reversing valve, an L cavity and an R cavity are formed in the two ends of the inner side of the hydraulic control reversing valve respectively, a reset spring and a sealing ring are arranged on the inner side of the L cavity and the inner side of the R cavity respectively, a connector assembly is arranged on the surface of the bottom end of the hydraulic control reversing valve, and an oil cylinder is arranged at the bottom end of the hydraulic control reversing valve. An iron nut locking mode is used for replacing an original mode that a cover plate is locked through four screws, the overall use efficiency is effectively improved, and the problems that deformation gaps are generated due to the fact that existing locking force is smaller than internal pressure, and internal hydraulic oil leaks to the outside due to long-time work can be solved.

A shovel includes a lower traveling structure, an upper swing structure swingably mounted on the lower traveling structure, a first hydraulic pump provided on the upper swing structure, an attachment attached to the upper swing structure, a first actuator, a second actuator, a first directional control valve corresponding to the first actuator, a second directional control valve corresponding to the second actuator, a first conduit connecting the first hydraulic pump and the first directional control valve, a second conduit connecting the first conduit and the second directional control valve, a control valve installed in the second conduit, and processing circuitry configured to control the opening area of the control valve according to information on work details.

Disclosed is a loop switching valve, comprising a valve body and a valve core arranged in the valve body, wherein the valve core comprises a valve core oil drainage channel arranged in the valve core, and the valve body comprises an oil drainage port (L), a valve body oil drainage channel arranged in the valve body, and a plurality of oil inlets and working oil ports; and the oil inlet is in communication with the corresponding working oil port in a working state, the working oil port in a non-working state is in communication with the oil drainage port (L) by means of the valve core oil drainage channel and the valve body oil drainage channel, so as to discharge hydraulic oil from the working oil port in the non-working state, thereby preventing misoperation. The problems in the prior art of leakage, oil cross-flow and pressure building of a multi-way directional control valve during loop switching are solved, so that the reliability of the system is greatly improved, and the requirements for daily inspection and maintenance of apparatuses by an apparatus management user are also reduced. Further disclosed are a crawler crane chassis hydraulic system using the loop switching and a crawler crane.

The invention discloses an asymmetric actuator electro-hydraulic control system and method. The asymmetric actuator electro-hydraulic control system comprises an energy supply and storage unit, a hydraulic control unit, a control unit and an asymmetric actuator. The energy supply and storage unit comprises a power battery unit, a high-voltage distributor, a motor controller and a motor generator which are electrically connected in sequence; the hydraulic control unit comprises a main pump motor, a volume compensation pump motor, an electro-hydraulic directional control valve, a holding valve, an oil tank and an energy accumulator, a port A1 of the main pump motor is connected with an oil inlet of the holding valve, an oil outlet of the holding valve is communicated with a port M of a rodless cavity of the asymmetric actuator, and a port B1 of the main pump motor is communicated with a port N of a rod cavity of the asymmetric actuator. The problem of system oscillation caused by the flow difference of the two cavities of the asymmetric actuator is effectively solved. The energy recovery unit can recover potential energy, and the endurance time of equipment is remarkably prolonged. The automatic switching function of the electro-hydraulic reversing valve effectively reduces the response time of the system so as to meet the high-frequency action requirement of engineering machinery.

The dish-washing machine shunt valve comprises a cover body, a shell, a rotary driver, a valve plate, a spring, a rotating piece and a rotary driver, the cover body and the shell are mutually covered to form a valve cavity, the rotating piece is rotationally connected to the shell and driven by the rotary driver to rotate, and the rotating piece comprises a linkage end. The linkage end is located in the valve cavity and faces the cover body, the valve plate is installed at the linkage end, and the valve plate is axially connected to the linkage end in a sliding mode; the cover body is provided with a first water outlet and a second water outlet, the valve plate is provided with a plurality of control positions, and the plurality of control positions comprise a closed position; the valve plate has three states in the axial rotation process, in the first state, the first water outlet can be blocked at the closed position; in the second state, the sealing position can block the second water outlet; and in the third state, the closed position is staggered with the first water outlet and the second water outlet. The dish-washing machine is simple in structure, capable of achieving dish-washing machine water path control, good in sealing performance of the shunt valve and small in water pressure loss.

The utility model discloses a continuous load gas circuit control system for roadbed detection, which relates to the technical field of roadbed detection and comprises a dynamic load subsystem and a static load subsystem. The dynamic load subsystem comprises a first electromagnetic directional valve, a dynamic load generating cylinder and a throttling speed regulating valve; the static load subsystem comprises an air supply solenoid valve, a second solenoid directional valve, an exhaust speed regulating valve, an exhaust solenoid valve, a static load generation cylinder and an air supply speed regulating valve; according to the utility model, the air cylinder can respectively generate a continuous circulating dynamic load and a stable and uniformly distributed static load on a roadbed by utilizing air path control.

A gear shifting system and a vehicle. The gear shifting system comprises a directional control lever, a hydraulic system, and an electronic control system. A first directional control valve, a forward clutch, and a reverse clutch are provided on a directional control branch of the hydraulic system; and the first directional control valve realizes the switching between the forward clutch and the reverse clutch by means of the movement of the directional control lever. An electric control valve, a first-gear clutch, and a second-gear clutch are provided on a gear shifting branch; and in an initial state, an oil passage from the electric control valve to the second-gear clutch remains open, so that the second-gear clutch is engaged when a vehicle is started. A controller of the electronic control system controls the switching between the first-gear clutch and the second-gear clutch on the basis of a speed signal measured by a speed sensor assembly.

The invention discloses a high-flow low-impact hydraulic control reversing valve and a using method thereof, and relates to the technical field of hydraulic control, the high-flow low-impact hydraulic control reversing valve is characterized by comprising a valve body and a valve core capable of reciprocating, the valve body is provided with main oil ports P, T, A and B and control oil ports X and Y, wedge-shaped grooves are formed in the circumferential shaft shoulder positions C, D, E and F of the valve core, and the wedge-shaped grooves are communicated with the valve body. The wedge-shaped groove is used for achieving slow opening or closing of the main oil port P and the main oil port A and the main oil port P and the main oil port B so as to control gradual change of the oil flow passing area, the effect is that through the design of hydraulic control and gradual change of the oil flow passing area, the reversing valve can be suitable for a hydraulic system with the flow being 2000 L / min and the pressure being 32 MPa, the drift diameter is increased to 51 mm from the maximum drift diameter 32 mm of a conventional hydraulic control reversing valve, and the hydraulic control reversing valve is suitable for a hydraulic system with the flow being 2000 L / min and the pressure being 32 MPa. And reversing is stable and reliable, and reversing impact is small.

This invention provides a hydraulic control system for a concrete placing boom, comprising a hydraulic oil tank, an oil supply pump unit, a main hydraulic pressure pipeline, a main return hydraulic pipeline, and at least one hydraulic actuator unit. The oil supply pump unit is located on the main hydraulic pressure pipeline. Each hydraulic actuator unit includes a hydraulic cylinder and a control valve assembly. The control valve assembly is located close to the hydraulic cylinder, or integrated onto the hydraulic cylinder. The control valve assembly includes a main directional valve, a standby directional valve, and a balance valve assembly. The inlet ports of the main directional valve and the standby directional valve are respectively connected to the main hydraulic pressure pipeline. The return ports of the main directional valve and the standby directional valve are respectively connected to the main return hydraulic pipeline. The outlet ports of the main directional valve and the standby directional valve are respectively connected to the hydraulic cylinder via the balance valve assembly. This invention also provides a control method for the hydraulic control system of the concrete placing boom and a concrete placing boom device.

This invention relates to the field of directional valve technology, specifically a miniature explosion-proof pneumatic directional valve with a redundant anti-jamming structure. It includes a housing with an internal air passage, a valve stem slidably disposed within the housing, a pneumatic piston connected to one end of the valve stem for driving the valve stem to reciprocate, a valve core slidably mounted on the valve stem and located within the air passage, and an anti-jamming component connected between the valve stem and the valve core. This component includes a positioning disc fixedly connected to the surface of the valve stem and an energy storage spring sleeved outside the valve stem, with both ends of the energy storage spring abutting against the positioning disc and the valve stem, respectively. When the valve core jams within the air passage, the valve stem can overcome the resistance of the anti-jamming component and continue moving relative to the valve core, allowing the anti-jamming component to store energy. When the stored energy reaches a threshold, the anti-jamming component releases the energy to drive the valve core to generate an impact motion.

The utility model discloses a mould locking hydraulic oil circuit, mould locking mechanism and high-speed packing machine, mould locking hydraulic oil circuit includes: main mould locking module including oil pump, mould locking oil cylinder, three-position four-way solenoid directional valve, first oil tank and second oil tank, the first oil tank is connected with the three-position four-way solenoid directional valve, the second oil tank is connected with the three-position four-way solenoid directional valve, the three-position four-way electromagnetic reversing valve is connected with the first cavity through a third oil way and connected with the second cavity through a fourth oil way. The auxiliary mold locking module comprises a cartridge valve and an electromagnetic control valve, the cartridge valve is arranged on the third oil way and divides the third oil way into a third front oil way and a third rear oil way, the cartridge valve is connected with the three-position four-way electromagnetic directional valve through the third front oil way, and the cartridge valve is connected with the first cavity through the third rear oil way; a control oil port of the cartridge valve is connected with the electromagnetic control valve through a fifth oil way, and the electromagnetic control valve is connected with the third rear oil way through a sixth oil way. The holding time of hydraulic oil pressure of the mold locking oil cylinder is effectively prolonged.

An automatic shutdown control device and a radiation source system are disclosed. The automatic shutdown control device includes a first actuator (15), a first one-way throttle valve (6), a first pilot-operated one-way throttle valve (11), a first directional valve (110), a fluid pressure source (1), a first return line, a fluid control valve (10), and a first accumulator (13). The first pilot-operated one-way throttle valve (11) includes a second one-way throttle valve (112) and a first one-way valve (111). When power is off, the first directional valve (110) switches to a second operating position (123), the outlet of the fluid pressure source (1) is connected to the through port of the second one-way throttle valve (112) through the first directional valve (110), and the through port of the first one-way throttle valve (6) is connected to the inlet of the first return line through the first directional valve (110). When the fluid pressure source (1) is outputting, the fluid control valve (10) switches to the closed position (101); when the fluid pressure source (1) is disconnected, the fluid control valve (10) switches to the open position (102), and the outlet of the first accumulator (13) is connected to the closed port (B2) of the first actuator (15) through the fluid control valve (10). This device can automatically complete the shutdown action in the state of power failure and / or flow interruption, without the need for manual shutdown, reducing the risks associated with manual operation.

The invention discloses a hydraulic control system for mining rail transportation equipment. The hydraulic control system comprises a walking system and an auxiliary system. The walking system adopts a double-closed variable pump independent parallel design, and the start, stop and flow direction of a pump set are controlled through an electromagnetic directional valve, so that the dual systems are mutually standby, and the core function is ensured not to be interrupted; the auxiliary system adopts a double-auxiliary-pump confluence design, a pressure stabilizing loop is constructed through a one-way valve and a pilot overflow valve, and reliable operation of auxiliary functions such as braking and clamping is guaranteed. The system can dynamically switch a single / double-pump operation mode, the single pump saves energy during light load, and the double pumps converge to increase torque during heavy load; the proportional pressure regulating valve and the constant-power valve are cooperatively controlled, overpower operation of the prime motor is prevented, and energy consumption and abrasion are reduced. And a prime motor adopts an anti-explosion design, an electromagnetic directional valve is automatically switched, a modular structure is convenient to maintain, and the continuity, the safety and the intelligent level of equipment under complex working conditions of a mine are remarkably improved.

The invention provides an integrated control hydraulic cylinder and a control method. The integrated control hydraulic cylinder comprises a hydraulic cylinder body, an oil inlet base fixedly arranged at the tail of the hydraulic cylinder body and a watertight cover installed on the oil inlet base. The oil inlet base is provided with a first oil port and a second oil port and is connected with a rodless cavity and a rod cavity of the hydraulic cylinder through an internal oil duct. A control valve set, a displacement sensor, a temperature and humidity sensor and a control panel are integrated in the watertight cover, and external communication is achieved through a watertight connector. The control valve set is composed of a proportional directional valve, a hydraulic control one-way valve and the like and can accurately control the flow direction of hydraulic oil and drive the piston rod to stretch out and draw back. The displacement sensor monitors the position of the piston rod in real time, and the temperature and humidity sensor monitors the environment in the watertight cover to ensure stable operation of the system. The system is compact in structure and highly integrated, has the functions of intelligent control, automatic adjustment and remote monitoring, is particularly suitable for being used in underwater or humid environments, and provides an efficient and reliable hydraulic execution solution.

The present invention discloses a multi-functional hydraulic detection device, which includes a housing. Inside the housing, there are a pressurization circuit, a speed regulation and large-flow oil supply circuit, and a hydraulic oil tank. The pressurization circuit is connected to the speed regulation and large-flow oil supply circuit and the hydraulic oil tank. The speed regulation and large-flow oil supply circuit is connected to the hydraulic oil tank. The pressurization circuit consists of a motor M01, a hydraulic pump P01, an electro-hydraulic proportional relief valve V01, a check valve V02, a supercharger V03, an electromagnetic directional valve V04, a hydraulic lock V05, a ball valve V06, a ball valve V07, and a pressure sensor. The motor M01 is connected to the hydraulic pump P01. The hydraulic pump P01 is simultaneously connected to the electro-hydraulic proportional relief valve V01 and the check valve V02. Both the electro-hydraulic proportional relief valve V01 and the check valve V02 are connected to the supercharger V03. The supercharger V03 is respectively connected to the ball valve V06 and the ball valve V07 through the electromagnetic directional valve V04 and the hydraulic lock V05. The present invention realizes the functions of simple structure, low cost, easy maintenance, and suitability for whole-machine inspection.