45results about How to "Simplify the hydraulic system" patented technology

The utility model relates to a hydraulic cylinder device and a hydraulic cylinder behavior control system with same. The hydraulic cylinder device comprises a cylinder body, a piston and a piston rod, wherein the piston moves in the cylinder body, one end of the piston rod is connected with the piston, and the other end thereof extends out of the cylinder body; and a plurality of signal through holes which are longitudinally arranged along the cylinder body to divide a piston stroke into a plurality of stroke sections are formed on the wall of the cylinder body. The hydraulic cylinder device also comprises a plurality of pressure sensors arranged corresponding to the signal through holes. Compared with the prior art, the invention can conveniently meet the real-time monitoring of the preset section position of the total stroke of the piston, and has the advantages of low cost, good generality and strong anti-interference capacity, and is favorable for giving full play to the powerful data-processing operation capacity of an intelligent controller, and the like.

The invention relates to the field of mechanical digital control, in particular to a digital servo hydraulic cylinder. A stepping motor directly drives a valve spool, large closed-loop control is realized by the aid of mechanical rigid feedback, leakage loss of a pilot stage is avoided by direct-acting design, the anti-pollution capacity of a valve is improved, a hydraulic system is simplified, single-cylinder multistage speed and directions can be controlled, multi-cylinder synchronous and reverse synchronous control and multi-cylinder interpolated linkage real-time control can also be realized, bidirectional data exchange with a field bus and an Ethernet can be performed, and the digital servo hydraulic cylinder has bus control and continuous control functions.

The invention provides a multi-way valve and a tunnel boring machine. The multi-way valve comprises a main oil inlet, an oil inlet control port, a main oil return port, a main oil drainage port and a plurality of reversing valve groups, wherein the reversing valve groups are used for controlling actuating elements respectively. Each reversing valve group is provided with a pilot-operated reversing valve and an electromagnetic reversing valve. The pilot-operated reversing valve comprises a first oil inlet, a first oil return port and two first working ports, hydraulic oil pumped from the main oil inlet is led into the first oil inlet, and the first working ports are connected with the actuating elements. The electromagnetic reversing valve comprises a second oil inlet, a first oil drainage port and two second working ports, hydraulic oil pumped from the oil inlet control port is led into the second oil inlet, and the second working ports are connected to two ends of the pilot-operated reversing valve to realize reversing thereof. Compared with the prior art, the multi-way valve has the advantages that the requirement to cleanliness of hydraulic oil is low, feedback oil ways are not easy to be blocked, automatic control is easy to realize and the like.

The invention discloses a guide drilling tool for developing shale gas. The guide drilling tool comprises a spiral drilling rig, a transmission shaft, a hydraulic system, a guide sleeve and a shell sleeved outside the spiral drilling rig, wherein the periphery of the lower end of the guide sleeve is provided with four oil cylinders which are parallel to the axial direction and are uniformly distributed on the guide sleeve at the included angles of 90 degrees; every two oil cylinders which are 180 degrees away from each other form a pair of reverse synchronous oil cylinders, so that two pairs of reverse synchronous oil cylinders are formed; four guide push arms are arranged on the guide sleeve corresponding to the four oil cylinders; one end of each guide push arm is hinged on the guide sleeve; and the piston rod ends of the four oil cylinders are arranged together with the other end of the guide push arm through a push block respectively, so that an adjustable upper stabilizer is constructed. The guide push arm is equivalent to a controllable eccentric upper stabilizer, and is combined with a lower stabilizer which rotates near a drill bit, so that a well track is smoother, and the control accuracy and efficiency of the well track are increased.

A hydraulic system for operating an automatic transmission for motor vehicles includes a hydraulic actuator for operating a clutch and a stop valve, whereas the actuator has a pressurizable actuating pressure chamber, which can be closed in a pressure-tight manner by means of the stop valve, such that the clutch pressure is maintained independent of the other pressures of the hydraulic system. The stop valve includes a closure device that is movable by means of a hydraulic control pressure (p_S) into a closed position, in which an actuating pressure chamber port, and thus the actuating pressure chamber, is closed by means of the closure device. The closure device is movable into an open position at least by means of the force of a spring, in which the actuating pressure chamber port is opened. Thereby, the stop valve features a shiftable locking device, by means of which the closure device can be fixed in the closed position.

The invention relates to the technical field of wet spray of concrete, and provides a double-power-driven system for a concrete wet-spray platform vehicle, which uses a series of pump sets of a diesel engine or motor-driven hydraulic system at different times and is used for driving an operating mechanism and a traveling mechanism at different times. The system comprises a diesel engine, a clutch, a gearbox, a double-shaft extension motor, a four-linkage pump set, changeover valves and an oil tank. According to the concrete wet-spray platform vehicle, the traveling mechanism can be driven to enter a tunnel and other construction fields by the diesel engine, the operating mechanism can be driven to operate or the traveling mechanism can be driven to move within a short distance through the motor after the platform vehicle reaches a construction site in place, and the motor can be switched into the diesel engine to drive the platform vehicle to operate continuously or move out of the construction site once electric power fails, so that harmful influences of the electric power on a construction process are prevented. Compared with the conventional driven system, the double-power-driven system has the advantages of simple system composition, simple hydraulic system, low manufacturing cost and high economy. The invention also provides the concrete wet-spray platform vehicle.

The invention discloses an integration series connection cylinder with an adjustable stroke. The integration series connection cylinder with the adjustable stroke comprises a front piston, a back piston, a front cylinder body, a back cylinder body, a piston rod I, a piston rod II, a cylinder front body, a cylinder middle body, a cylinder cover and a set of pull rods. The integration series connection cylinder with the adjustable stroke is characterized in that a front hydraulic cylinder is composed of the cylinder front body, the front cylinder body, the cylinder middle body, the front piston, the piston rod I and the like, a back hydraulic cylinder is composed of the cylinder middle body, the back cylinder body, the cylinder cover, the back piston, the piston rod II and the like, and the front hydraulic cylinder and the back hydraulic cylinder are connected through the cylinder middle body, the piston rod II and the set of pull rods in series to form the series connection cylinder. The integration series connection cylinder with the adjustable stroke is high in synchronization precision and anti-unbalance loading capability, the stroke is adjustable, and the stroke adjusting amount of a plate bending machine can be directly controlled; the integration series connection cylinder with the adjustable stroke is high in integration degree, the hydraulic system is simplified, the control capability is high, and the integration series connection cylinder with the adjustable stroke is safe and reliable.

The invention relates to a hydraulic cylinder, and provides an integrated hydraulic cylinder having a bidirectional pressure safety protection function. The integrated hydraulic cylinder is used for achieving bidirectional hydraulic medium pressure safety protection from any cavity to the other cavity of the hydraulic cylinder on the basis of achieving basic functions of the hydraulic cylinder in a narrow space. The integrated hydraulic cylinder is composed of a cylinder body, a large end cover, a piston with a piston rod, a guide sleeve, a sealing component, a safety valve, a stop valve and a pipeline. The safety valve is composed of a large lock nut, an end cover, a pilot valve and a main valve. The stop valve is composed of a lock nut, a valve body and a valve element. The safety valve and the stop valve are integrated in the cylinder body of the hydraulic cylinder. According to the integrated hydraulic cylinder, the safety valve and the stop valve are integrated, so that multiple functions are added under the condition that the size of the hydraulic cylinder is basically not increased. The integrated hydraulic cylinder has the characteristics of being rich in function, compact in structure, high in integration level and the like.

The invention relates to a hydraulic cylinder and provides an integrated hydraulic cylinder with a bidirectional stroke limit function. The integrated hydraulic cylinder is used for achieving bidirectional piston rod stroke limit of the hydraulic cylinder from any cavity to another cavity on the basis that the basic functions of the hydraulic cylinder are achieved in narrow space. The integrated hydraulic cylinder is composed of a cylinder block, a big end cover, a piston, a guide sleeve, a sealing assembly, a limit valve, a stop check valve and a pipeline. The limit valve is composed of a small oil cylinder, a valve sleeve, a spring, a valve element and the like. The small oil cylinder is composed of an end cover, a small cylinder block and a small piston. The stop check valve is composed of a valve deck, a valve body, a valve rod and a valve cone. The limit valve is integrated into the big end cover of the hydraulic cylinder. The stop check valve is integrated into the cylinder block of the hydraulic cylinder. According to the integrated hydraulic cylinder, the limit valve and the stop check valve are integrated, and multiple functions are added on the basis of scarcely increasing the size of the hydraulic cylinder. The integrated hydraulic cylinder has the beneficial effects of being rich in function, compact in structure, high in integration level and the like.

The invention discloses an internal feedback axial-flow induced draft fan moving blade adjusting mechanism and a working method thereof. The mechanism comprises a control system, a servo valve, a center shaft, a hydraulic cylinder, a main shaft flange, a flow distribution rotating shaft and a displacement sensor; the flow distribution rotating shaft is connected with a piston shaft in the hydraulic cylinder through bearings at two ends; the displacement sensor is mounted at the end surface of the flow distribution rotating shaft, and is fixed through a screw; when the hydraulic cylinder drivesthe center shaft to move, the displacement sensor continuously sends signals to a detecting rod; the servo valve is connected with an oil port of the flow distribution rotating shaft; and the controlsystem is used for controlling the servo valve to supply oil to the flow distribution rotating shaft. The mechanism has the following advantages: two actions of rotation and axial movement of the hydraulic cylinder can be synchronously realized; a closed-loop control system is formed through the high-precision displacement sensor; the structure is simple; and the feedback response is quick and continuous.

The invention discloses a pressure boost oil cylinder and an ultrahigh pressure sheet bar hydraulic machine. The pressure boost oil cylinder comprises a cylinder barrel and a plunger, and the plunger is located in the cylinder barrel and connected to the inner wall of the cylinder barrel in a sliding mode; a cavity is formed in the plunger, a pressure boost piston is arranged in the cavity, and the pressure boost piston is connected to the inner wall of the plunger in a sliding mode; a pumping pressure oil mouth and a pressure boost oil mouth which are communicated with each other are further formed in the plunger, and the pumping pressure oil mouth penetrates through the plunger, a distance sleeve and the pressure boost piston in sequence; an opening is formed in the end, located on the outer wall of the upper portion of the plunger, of the pressure boost oil mouth, and the other end of the pressure boost oil mouth is formed in the connection portion between the upper portion of the plunger and the top of the pressure boost piston. According to the pressure boost oil cylinder, the plunger is combined with the pressure boost piston, through secondary pressure boost, the pressure boost oil cylinder forms ultrahigh pressure, a pressurizer is not needed, through an ultrahigh pressure valve group and an ultrahigh pressure pipe, a hydraulic system of the hydraulic machine is simplified, and the cost is lowered; the ultrahigh pressure pipe is removed, the safety is improved, the pressing efficiency is improved, and the energy consumption is lowered.

The invention discloses a hydraulic system for an oil cylinder pressure maintaining test. The hydraulic system comprises an oil supply system, an overflow system, a first oil return system and secondoil return system and is characterized in that the oil supply system comprises an oil pump, a reversing valve, a throttling valve, a pressure regulating valve and a first stop valve which are sequentially communicated through an oil inlet pipe, the oil inlet end of the oil inlet pipe extends into an oil storage tank, and the oil outlet end of the oil inlet pipe is provided with a first pipe connector; the overflow system comprises an overflow pipe and an overflow valve arranged on the overflow pipe, and the oil inlet end of the overflow pipe is communicated to the oil inlet pipe between the oil pump and the reversing valve; the first oil return system comprises a first oil return pipe, a second stop valve and a filter, the second stop valve and the filter are communicated through the firstoil return pipe, and the oil inlet end of the first oil return pipe is communicated to the oil inlet pipe between the first stop valve and the pressure regulating valve; the second oil return systemcomprises a second oil return pipe, and the oil inlet end of the second oil return pipe is provided with a second pipe connector. The hydraulic system can supply oil for an oil cylinder so as to drivethe oil cylinder to telescope.

The invention discloses a hydraulic auxiliary coupler loop of a backhoe loader. The hydraulic auxiliary coupler loop comprises a main control valve and a switching valve, wherein the main control valve is a three-position six-way reversing valve; the switching valve is arranged on a working oil line of the main control valve; and a quick joint is arranged at the tail end of the working oil line of switching valve. The working oil line of the main control valve can be divided into two oil lines through the switching valve, the principle of the switching valve is simple, the structure can be generally manufactured to be small and exquisite, and the arrangement is convenient, so that the complexity of a hydraulic system can be greatly simplified in an arrangement process of the whole hydraulic pipeline of a complete machine, the reliability of the system is improved, and requirements of connecting accessories can be met at the same time.

The invention relates to a ram pump, in particular to a ram pump without sliding shoes and swash plates. An input shaft (1) is provided with a front cavity body (4), a front baffle (3), a rear baffle (15) and a rear cavity body (8), wherein, the front cavity body (4) and the rear cavity body (8) are respectively connected with the input shaft (1) via a bearing; a thrust bearing is arranged between the front cavity body (4) and the front baffle (3); the front baffle (3) and the rear baffle (15) are respectively fixedly connected with the input shaft (1); a port plate (12) is arranged between the rear baffle (15) and the rear cavity body (8); a support ring (7) is arranged inside a shell body (5); the support ring (7) contacts an adjusting screw (6) and a spring (16) arranged on the upper end and the lower end of the shell body (5); a cylinder (1) is arranged on the inner side of the support ring (7), and between the front baffle (3) and the rear baffle (15) via a needle bearing (9); the cylinder (10) is provided with 2 to 7 cylinder holes uniformly distributed around the center of the cylinder (10); a cylinder unit which is fixed on the front baffle (3) and the rear baffle (15) is arranged in the cylinder holes, and the rear baffle (15) is provided with a kidney-shaped hole. The pump has the advantages of no sliding shoes, no swash plates and little friction pair, which is beneficial to the control of an oil pump and to the increase of pressure; furthermore, as the oil pump can bidirectionally output pressure oil, the hydraulic system is simplified.

The invention discloses a draw arm device of a single-cylinder draw arm type garbage truck. The draw arm device of the single-cylinder draw arm type garbage truck comprises a draw arm, a lifting hydraulic cylinder, a linkage frame, an auxiliary frame, a locking hydraulic cylinder and a locking mechanism. A cylinder rod of the lifting hydraulic cylinder and the draw arm are hinged at the middle position point B of the draw arm, and a cylinder barrel of the lifting hydraulic cylinder and the auxiliary frame are hinged at the middle position point A of the auxiliary frame to form the rotation center of the lifting hydraulic cylinder. The tail portion of the draw arm and the front end of the linkage frame are hinged at the tail point C of the draw arm. The rear end of the linkage frame and theauxiliary frame are hinged at the tail point D of the auxiliary frame through a pin roll. The locking mechanism and the linkage frame are hinged at the middle point E of the linkage frame through a pin roll. A cylinder rod of the locking hydraulic cylinder and the locking mechanism are hinged at the end point F of the locking hydraulic cylinder. A cylinder barrel of the locking hydraulic cylinderand the linkage frame are hinged at the front point G of the linkage frame. According to the draw arm device of the single-cylinder draw arm type garbage truck, because hydraulic locking is adopted,and a cylindrical surface is adopted for increasing locking contact area, and it is avoided that when a garbage can is pulled onto the auxiliary frame, interference occurs between the hydraulic cylinder and the garbage can as well as between the locking mechanism and the garbage can.

The invention provides a hydraulic motor control system and a full-hydraulic walking-type pile driving frame. The hydraulic motor control system comprises two or more than two hydraulic motors, a proportional multiple directional reversing valve and two or more than two reversing valves, wherein each hydraulic motor comprises a first motor oil port and a second motor oil port; the proportional multiple directional reversing valve comprises a pressure oil port, an oil discharge outlet, a first oil outlet and a second oil outlet; the reversing valves correspond to the hydraulic motors and are connected with the hydraulic motors in parallel; each reversing valve comprises a first oil port, a second oil port, a third oil port and a fourth oil port; each first oil port is communicated with the first oil outlet; each second oil port is communicated with the second oil outlet; each third oil port is communicated with the first motor oil port of the corresponding hydraulic motor; and each fourth oil port is communicated with the second motor oil port of the corresponding hydraulic motor. According to the invention, the sequential working of a plurality of hydraulic motors can be implemented in a simple mode; the hydraulic system is simplified; hydraulic elements are reduced; and the cost is reduced.

The invention relates to a hydraulic cylinder, which provides an integrated hydraulic cylinder with bidirectional stroke limitation, which is used to realize the bidirectional piston rod stroke from any cavity of the hydraulic cylinder to the other cavity on the basis of realizing the basic functions of the hydraulic cylinder in a narrow space limit. The invention is composed of a cylinder body, a large end cap, a piston, a guide sleeve, a sealing assembly, a limit valve, a stop check valve and a pipeline; the limit valve is composed of a small oil cylinder, a valve sleeve, a spring, a valve core, etc.; It is composed of an end cover, a small cylinder body and a small piston; the stop check valve is composed of a valve cover, a valve body, a valve stem and a valve cone. The limit valve is integrated in the large end cover of the hydraulic cylinder, and the stop check valve is integrated in the cylinder block of the hydraulic cylinder. The invention integrates the limit valve and the stop check valve, so that the hydraulic cylinder can increase multiple functions without increasing the volume substantially. The invention has the characteristics of rich functions, compact structure, high integration degree and the like.

The invention discloses a unilateral variable damping control type 2D hydraulic cylinder based on the hydraulic half bridge. The hydraulic cylinder comprises a cylinder body, a cylinder sleeve, a front end cover, a rear end cover, a piston rod and a piston and further comprises a stepping motor, an ejecting block, a displacement sensor (LVDT), a guide mechanism and a guide mechanism fixed frame; the novel hydraulic cylinder structure is designed, the cylinder sleeve structure is added, a high pressure hole and a low pressure hole are designed in the piston and can be matched with the cylindersleeve to form the hydraulic damping half bridge, the stepping motor drives the cylinder sleeve to directly control the hydraulic cylinder piston rod to stretch out and draw back, the displacement sensor (LVDT) is used for detecting the piston rod displacement, digital control over the hydraulic cylinder is achieved, a hydraulic control valve is omitted, and the hydraulic system is simplified.

The invention belongs to the technical field of mechanical equipment, and relates to a pre-tightening method for a super-lift inhaul cable of an all-terrain crane. The pre-tightening method comprisesthe following steps that S1, a proper working condition is selected, the arm length L of the all-terrain crane is determined according to the lifting height, amplitude and the like, and the length H of the released super-lift inhaul cable is determined according to the arm length L; S2, a main arm extends to a rope releasing position, a winch releases the super-lift inhaul cable with the length ofH, and a locking device is locked; and S3, a main arm telescopic oil cylinder pushes a second-section arm to extend, so that the length of the arm reaches L, and pre-tightening is achieved. Accordingto the pre-tightening method for the super-lift inhaul cable of the all-terrain crane, the pre-tightening principle is characterized in that the main arm telescopic oil cylinder pushes the main arm to extend, and the hinge point at the upper end of the super-lift inhaul cable extends outwards along with extension of the main arm, so that the distance between the two hinge points of the inhaul cable is increased, and tensioning of the inhaul cable is achieved; and according to the pre-tightening method for the super-lift inhaul cable of the all-terrain crane, the structure is simplified, the preparation time is saved, the operation steps are reduced, and a tensioning oil cylinder in a super-lift supporting rod can be effectively replaced, so that a hydraulic system is simplified, the manufacturing cost is saved, the main arm telescopic oil cylinder is fully utilized to provide large pre-tightening force, and the lifting performance of the crane is maximized.

The invention relates to a high-pressure protection device for a hydraulic cylinder, which relates to the technical field of hydraulic control, and solves the problems in the prior art that the pipelines of the oil spill protection device are redundant and the position accuracy of the hydraulic cylinder is difficult to guarantee after oil spillage. The hydraulic cylinder high pressure protection device of the present invention includes a valve body and a first piston, a second piston and a spring installed in the inner cavity of the valve body; the spring is located between the first piston and the second piston; The ends are respectively connected with the rodless cavity and the rod cavity of the hydraulic cylinder; when the pressure in the rodless cavity and the rod cavity overcomes the initial elastic force of the spring, the hydraulic oil pushes the first piston and the second piston to compress the spring, and the hydraulic oil flows to inside the valve cavity. The hydraulic cylinder high-voltage protection device of the present invention has a simple structure, can be directly installed on the hydraulic cylinder control valve block, saves the overflow valve and the oil overflow pipeline, and simplifies the hydraulic system; The displacement does not exceed 1mm, which ensures the position accuracy of the hydraulic cylinder.

The invention discloses a unilateral variable damping control type 2D hydraulic cylinder based on the hydraulic half bridge. The hydraulic cylinder comprises a cylinder body, a cylinder sleeve, a front end cover, a rear end cover, a piston rod and a piston and further comprises a stepping motor, an ejecting block, a displacement sensor (LVDT), a guide mechanism and a guide mechanism fixed frame; the novel hydraulic cylinder structure is designed, the cylinder sleeve structure is added, a high pressure hole and a low pressure hole are designed in the piston and can be matched with the cylindersleeve to form the hydraulic damping half bridge, the stepping motor drives the cylinder sleeve to directly control the hydraulic cylinder piston rod to stretch out and draw back, the displacement sensor (LVDT) is used for detecting the piston rod displacement, digital control over the hydraulic cylinder is achieved, a hydraulic control valve is omitted, and the hydraulic system is simplified.

A flow-adjustable double side plate type three-position four-way rotary valve comprises a valve element, wherein valve plates are installed at two ends of the valve element in a matched mode, an adjustable boss is installed at the other end of each valve plate, the centers of the adjustable bosses are holed and are installed on an output end of a motor shaft of a built-in motor, a lead screw adjusting nut mechanism consists of an output lead screw shaft slippage nut of the built-in motor, wherein a lead screw shaft is arranged in a central hole of the motor shaft, the slippage nut can slide in an inner hole formed in an outer end cover, thrust ball bearings are connected between the slippage nut and the adjustable bosses, the outer end cover is connected with a valve sleeve, threads at two ends of the lead screw shaft are oppositely symmetric so that the adjustable bosses at two ends of the valve element can perform same-direction or reverse-direction linear motions, four small holes for springs to be arranged are formed in the adjustable bosses to ensure that the adjustable bosses always abut against the end face of the valve element in the axial moving process. The flow-adjustable double side plate type three-position four-way rotary valve controls on and off of hydraulic oil through matched rotations of the valve plates at two ends of the valve element, adjusts oil flow through the adjustable bosses and enables a hydraulic system to be simplified.

The invention discloses an integration series connection cylinder with an adjustable stroke. The integration series connection cylinder with the adjustable stroke comprises a front piston, a back piston, a front cylinder body, a back cylinder body, a piston rod I, a piston rod II, a cylinder front body, a cylinder middle body, a cylinder cover and a set of pull rods. The integration series connection cylinder with the adjustable stroke is characterized in that a front hydraulic cylinder is composed of the cylinder front body, the front cylinder body, the cylinder middle body, the front piston, the piston rod I and the like, a back hydraulic cylinder is composed of the cylinder middle body, the back cylinder body, the cylinder cover, the back piston, the piston rod II and the like, and the front hydraulic cylinder and the back hydraulic cylinder are connected through the cylinder middle body, the piston rod II and the set of pull rods in series to form the series connection cylinder. The integration series connection cylinder with the adjustable stroke is high in synchronization precision and anti-unbalance loading capability, the stroke is adjustable, and the stroke adjusting amount of a plate bending machine can be directly controlled; the integration series connection cylinder with the adjustable stroke is high in integration degree, the hydraulic system is simplified, the control capability is high, and the integration series connection cylinder with the adjustable stroke is safe and reliable.

The invention belongs to the technical field of mechanical equipment, and relates to a method for pre-tightening cables of super-lifting all-terrain cranes. The steps are as follows: S1: Select a suitable working condition, determine the arm length L of the all-terrain crane according to the lifting height, amplitude, etc., and determine the length H of the super-lifting cable according to the arm length L; S2: Extend the main arm to the rope release position, The hoist releases the super-lifting cable with a length of H, and the locking device is locked; S3: The telescopic oil cylinder of the main arm pushes the second-section arm to extend, so that the arm length reaches L, and realizes pre-tightening. The pre-tightening principle of the present invention is as follows: the telescopic oil cylinder of the main arm pushes the main arm to elongate, the upper hinge point of the super-lifting cable stretches out with the elongation of the main arm, and the distance between the two hinge points of the cable increases, realizing the tension of the cable. tension. The invention simplifies the structure, saves preparation time, reduces operation steps, can effectively replace the tensioning oil cylinder in the super-lifting strut, simplifies the hydraulic system, saves manufacturing costs, and makes full use of the telescopic arm oil cylinder to provide a large pre-tightening force, so that the crane can lift Heavy performance is maximized.

The invention belongs to the technical field of petroleum machinery and particularly provides a lifting type hydraulic power catwalk system designed for transporting drilling tools automatically between a drilling tool rack and a drilling floor. The lifting type hydraulic power catwalk system mainly comprises a drilling tool rack turn-out mechanism, a turn-over arm mechanism, a turn plate mechanism, a lifting mechanism and a tackle mechanism, wherein the drilling tool rack turn-out mechanism transports the drilling tools between the drilling tool rack and a main catwalk body by the aid of lifting of hydraulic cylinders; the turn-over arm mechanism transports the drilling tools from turn-over arms to conveying arms or returns the drilling tools; the turn plate mechanism cooperates with the turn-over arm mechanism to transport single drilling tool from the turn-over arms to the conveying arms or return the drilling tool; the lifting mechanism lifts the conveying arms for conveying the drilling tools to a certain height; the tackle mechanism pushes the drilling tools out for a certain distance along the conveying arms. The lifting type hydraulic power catwalk system has the advantages of high degree of automation, high applicability and stability, simple structure, stability and reliability, and is particularly suitable for operation of medium-small sized drilling rigs with lower drilling floors.

The invention relates to an emulsion cylinder crane walking device, belonging to the technical field of crane walking device; the technical problem to be solved is to provide an emulsion cylinder crane walking device with good safety and simple structure so as to lead cranes under the coal mine to continuously walk for a long distance, wherein a first rack and a second rack are respectively arranged on the upper portion and the lower portion of a frame in a parallel manner; the frame vertically moves under control of a lifting hydraulic cylinder so that a gear is meshed with the first rack or with the second rack; a retractable hydraulic cylinder controls the moving direction of the frame so that the racks drive the gear meshed therewith to rotate; the gear is fixed on a cantilever axle and rotates to drive a crane roller mounted on the cantilever axle to rotate; the crane roller rotates to drive the crane to walk; both the lifting hydraulic cylinder and the retractable hydraulic cylinder employ the existing emulsion pressure system in the coal mine as power; and the emulsion cylinder crane walking device is used for walking of cranes.

The invention discloses a blood cell counting device and method based on rated number. The device comprises an impedance cell detection device, a control circuit, an electromagnetic valve, a trace flowmeter, a timing starting unit and a waste liquid pump and is characterized in that the electromagnetic valve, the trace flowmeter, the timing starting unit and the waste liquid pump are sequentiallyconnected through guide pipes, the liquid inlet end of the electromagnetic valve is connected to a rear reaction chamber through a guide pipe, and the impedance cell detection device, the electromagnetic valve, the trace flowmeter, the timing starting unit and the waste liquid pump are connected with the control circuit. The blood cell counting device and method based on rated number has the advantages that the rated number of cells participating in the counting can be fixed at a large value, the volume of blood cell diluent passing micropores can be calculated by multiplying counting time bythe measured value of the trace flowmeter in the counting time, a volume setting device is omitted, a liquid path system can be simplified, structure space can be reduced, blood cells in in content in blood can be measured to obtain a large cell number, and instrument measuring precision can be increased.