69results about How to "Safe and reliable working performance" patented technology

The invention discloses a tunnel arch center installation operation vehicle. The tunnel arch center installation operation vehicle comprises a machine frame, a travelling mechanism, a traction mechanism, an arch center lifting device for lifting tunnel arch centers which are arranged on the rear part of the machine frame and are needed to be installed one by one, and an arch center transferring mechanism for transferring the arch centers which are lifted by the arch center lifting device one by one through alignment and adjustment; the arch center transferring mechanism comprises a translating trolley which can move forward and backward on the upper part of the machine frame, a lifting mechanism for stably lifting the tunnel arch centers, and a left and right movement mechanism for driving the lifting mechanism to synchronously move left and right; and the translating trolley, the left and right movement mechanism, and the lifting mechanism align and adjust the tunnel arch centers front and back, right and left and up and down respectively. The tunnel arch center installation operation vehicle has a reasonable design, is convenient to assemble, and easy and convenient to operate, safe and reliable in working performance, and good in a using effect, and can solve the problems of large working difficulty in movement and accurate positioning of steel arch centers after lifting during the installation of the conventional steel arch centers, low installation efficiency, large labor intensity and the like.

The invention discloses a molding device and a molding method for a long spiral extruding rock-entering cast-in-place pile. The molding device comprises a drilling device formed by assembling a drill stem and a drill arranged at the bottom of the drill stem coaxially, a lowering / lifting system, an electric rotating driving mechanism for driving the drilling device to rotate continuously, a slip casting device for grouting casting slip into molded drill holes continuously to form bored piles when the lowering / lifting system lifts the drill stem, a drilling depth / lifting height detecting unit, a pumping flow detecting unit, a controller and a parameter input unit connected with the controller. The molding method includes: 1 setting initial parameters; 2 drilling; 3 further processing after drilling is in place; and 4 lifting the drill and slip-casting simultaneously. The molding device and the molding method are reasonable in design, easy to use and operate, high in automation, easy in molding process, easy in controlling of pile quality, wide in application range and capable of solving a plurality of problems in the existing molding devices and molding methods for the long spiral extruding rock-entering cast-in-place pile.

The invention relates to a portable blowing and suction machine, comprising a main unit shell, a motor arranged in the shell, a fan which is driven to rotate by the motor, a switch for controlling the rotation of the motor, a blowing and suction accessory which is connected with the main unit shell in a detachable way and a safety mutual interlocking gear arranged between the blowing and suction accessory and the main unit shell; the safety mutual interlocking gear comprises a trigger gear which can motivate a switch only when the blowing and suction accessory is connected with the main unit shell and a lock device for locking the blowing and suction accessory on the main unit shell when the motor is started; the safety mutual interlocking gear further comprises a slide block, when the blowing and suction accessory is separated from the main unit shell, the slide block can restrict the movement of the trigger gear, thus facilitating the installation and connection of the blowing and suction accessory and the main mechanism.

The invention discloses a long screw extrusion-socketed cast-in-place pile construction method based on circulating slurry breast wall, comprising the steps of first, burying a protective barrel and setting a slurry circulating system that comprises a slurry storage tank and a slurry pumping device, with the upper portion of the protective barrel provided with an overflow hole; second, drilling to form a borehole; third, lifting a drill pipe, and casting a slurry breast wall under high pressure: lifting up the drill pipe, and continuously casting wall supporting slurry from bottom to top from the borehole bottom through the drill pipe by using the slurry pumping device; fourth, lowering a reinforcement cage; fifth, casting concrete underwater and recycling the wall supporting slurry, and recycling the wall supporting slurry discharged through the overflow hole to the slurry storage tank for backup. The method has simple steps, is easy to implement, has high hole-forming quality and good construction effect, and enables the construction of a long screw extrusion-socketed cast-in-place pile to be finished simply and quickly, and by casting the wall supporting slurry from bottom to top from the borehole bottom in a high-pressure casting manner, it is possible to effectively protect the wall and keep the borehole bottom clean with no deposit; the wall supporting slurry is reusable.

The invention discloses an electrical anti-misoperation locking system and an anti-misoperation locking method based on iris identification. The system comprises a five-anti monitoring computer, a computer key and an iris identification unit, wherein the computer key is connected with the five-anti monitoring computer and carries out unlocking control on a code lock system, and the iris identification unit is connected with the five-anti monitoring computer and is formed by an iris information acquisition module and a main control module. The method comprises the following steps: 1. acquiring the iris image; 2. using the main control module to analyze the obtained iris image and realize automatic personal identity authentication, namely matching, specifically comprising image processing, characteristic extraction and characteristic matching; and 3. using the five-anti monitoring computer to correspondingly carry out unlocking control on the computer key according to the matching results transmitted by the main control module. The invention features reasonable design, simple and convenient use and operation, flexible operating mode, highest identification accuracy, fast speed and strongest anti-counterfeit capacity, and can effectively overcome various defects and shortcomings in the current electrical anti-misoperation locking systems.

The invention discloses an anti-cavitation protection device of a feedwater pump, which comprises two pressure detection units, a difference value comparison unit and a control system. The difference value comparison unit is used for comparing the difference value of signals detected by the two pressure detection units and comparing and judging a difference value comparison result with a set protection value Dp=NpSH* Rhog, the control system is used for controlling the feedwater pump to trip according to a comparison and judgment result of the difference value comparison unit and carrying out cavitation protection, the two pressure detection units are used for respectively detecting the suction inlet pressure of the feedwater pump and the internal pressure of a deaerator in real time, and the difference value comparison unit and the control system are connected and synchronously transmit the difference value comparison result to the control system. The invention has reasonable design, simple structure, convenient arrangement and real-time, dynamic and accurate reflection of the practical operation working conditions of the feedwater pump, is more scientific, reasonable and reliable than the traditional cavitation protection, and effectively overcomes the defects of necessary big-head booster pump arrangement, easy cavitation protection malfunction, poor use effect, and the like of a traditional feedwater pump.

Disclosed is a high-pressure high-flow alternating-current servo direct-driven threaded flow valve. An alternating-current servo motor directly drives a valve spool to open and close by the aid of transmission of threads, and the threads only need to transmit driving force on a single side during integral operation of the valve due to hydraulic force, and are selectively one-way transmission saw-toothed threads. The valve is simple in structure, accurate in control and convenient in use, can be directly digitally controlled by a computer and has excellent buffering and positioning performances, the requirement on positioning at an optional point can be met, a closed-loop system with an electrical feedback function can be realized, particularly, the problem that an original servo valve is sensitive to oil pollution can be effectively solved, and shortcomings that the original servo valve is used difficultly in high-pressure and high-flow environments and the like are also overcome. In addition, the valve is wide in working pressure range and high in flow, and can also work under extremely low oil supply pressure, the dynamic performance of the valve is rarely affected by the oil supply pressure, and the efficiency of a system can be improved due to the fact that intermediate transmission links are few.

The invention discloses a quick separation locking radio frequency coaxial connector, consisting of two parts of a two-way socket and a straight type plug, wherein, the two-way socket is connected with the straight type plug by an elastic spring, two sides of a first outer shell of the two-way socket are symmetrically provided with a first insulator and a second insulator, a jack is arranged between the two insulators, in the first outer shell, the jack is in close fit with the first insulator and the second insulator by a clamping ring; a first turnbuckle of the straight type plug is arranged on the periphery of a second turnbuckle of the straight type plug, a contact is in the second turnbuckle, a third insulator is arranged in the contact, a fourth insulator is arranged on a back end of the third insulator, a contact pin is arranged between the third insulator and the fourth insulator; a second outer shell is in threaded connection with a back end of the second turnbuckle, crimp connection sleeve is arranged inside a third turnbuckle which is in threaded connection with a back end of the second outer shell. The invention has the advantages of having the quick separation and locking capabilities, saving time and greatly improving the working efficiency, along with artful, simple and reasonable structural design, convenient manufacture and use and safe, stable and reliable service behavior.

The invention discloses a transport mechanism for tunnel construction, which comprises a travelling trolley, a lift mechanism and a lateral movement mechanism, the travelling trolley can move forward and back ward along a horizontal movement track, the lift mechanism can stably lift an article to be transported, the lateral movement mechanism can drive the lift mechanism to synchronously move to the left and the right, and is mounted on the travelling trolley, the lift mechanism is firmly mounted on the lateral movement mechanism, and the travelling trolley, the lateral movement mechanism andthe lift mechanism are a forward and backward alignment mechanism, a leftward and rightward alignment mechanism and an upward and downward alignment mechanism which can respectively align the articleto be transported in longitudinal, transverse and vertical directions. The transport mechanism has the advantages of simple structure, reasonable design, safe and reliable working performance and good use effect, is convenient to assemble and easy and convenient to operate, and can effectively solve a variety of practical problems in the movement and accurate positioning of hoisted articles in the process of tunnel construction, such as high working difficulty, low mounting efficiency, high labor intensity and long construction period.

The invention discloses a movable parking system, which comprises multiple movable three-dimensional garages and a support vehicle for providing multiple services for the multiple movable three-dimensional garages, wherein each movable three-dimensional garage comprises a movable garage composed of a garage body and multiple traveling wheels, a main driving mechanism which is arranged at the rear part of the movable garage and is used for lifting and descending the vehicle, an auxiliary driving mechanism which is arranged at the front part of the movable garage and is used for lifting and descending the vehicle, a horizontal parking board, a control system and a movable garage tractor for drawing the movable garage to move; and upper and lower layers of parking spaces are arranged in the garage body, and multiple parking spaces are correspondingly arranged on each layer of parking space. According to the invention, the parking system is reasonable in design, simple in structure, economical and practical, easy and simple to use and operate, and good in use effect; and the defects that the maneuverability is poor, the investment cost is high, wasting of resources is severe, a temporary parking requirement cannot be met and the like of the existing fixed type three-dimensional garage are effectively overcome.

The invention discloses a carbon / carbon composite material lifting appliance for a high-temperature furnace, which comprises a bearing chassis, a plurality of borne lifting rods and a plurality of annular plates, wherein the borne lifting rods are distributed on the bearing chassis along the circumference direction; the annular plates are respectively used for fixing the borne lifting rods and are distributed in the horizontal direction; the annular plates and the bearing chassis are firmly connected with the borne lifting rods respectively by a fastening device I and a fastening device II; and the borne lifting rods, the bearing chassis, the annular plates, the fastening device I and the fastening device II are made of a carbon / carbon composite material and commonly form an integral type lifting appliance which can carry out heat treatment with a treated product under the temperature condition of 1,500-3,000 DEG C. The invention has the advantages of simple structure, good use effect, safe and reliable working performance and long service life, is convenient for assembly and simple and convenient for operation, and can solve the problems that the traditional lifting appliance for a high-temperature furnace can not be subjected to high-temperature treatment process together with the treated product and needs an operator to lift the product in the furnace, the labor condition is poor, the safety is low, and the like.

The invention provides a cast-in place pile reinforcing cage mounting and positioning method and an auxiliary device used for the cast-in place pile reinforcing cage mounting and positioning method. According to the cast-in place pile reinforcing cage mounting and positioning method, a positioning clamp frame is used for supporting, positioning and fixing a cast-in place pile reinforcing cage in acast-in place pile guide pipe. The positioning clamp frame is composed of a first fixed casing pipe, a second fixed casing pipe, two supporting rods, a middle casing pipe, a pipe body, an extension pipe, a fixing clamp bolt and a wheel, wherein the middle casing pipe is arranged at the rear end of the pipe body, the rear end of the extension pipe is inserted into the front end of the pipe body, the fixing clamp bolt is inserted into a fixing hole and a corresponding adjustment hole to fix the rear portion of the extension pipe in the pipe body, and the other ends of the two supporting rods obliquely extend outwards and are correspondingly connected with the first fixed casing pipe and the second fixed casing pipe. The cast-in place pile reinforcing cage mounting and positioning method andthe auxiliary device used for the cast-in place pile reinforcing cage mounting and positioning method have the advantages that the cost is low, operation is easy, labor and time are saved, the applicability is high, the mounting and positioning quality and speed of the cast-in place pile reinforcing cage are improved, the construction efficiency is improved, the construction period is shortened,and the using effect is good.

The invention provides a silicon-based miniature loop heat pipe cooler, which comprises a semiconductor silicon wafer and a heat-resisting borosilicate glass sheet which are bonded together; an evaporator, a condenser, a liquid compensator, a liquid-phase channel, a vapor-phase channel and a vacuumizing / liquid injection micro-channel are etched on the surface, in contact with the borosilicate glass sheet, of the silicon wafer; two ends of the evaporator and two ends of the condenser are connected respectively through the liquid-phase channel and the vapor-phase channel to form a closed loop; a liquid storage cavity is arranged on the liquid-phase channel; the evaporator comprises small conduits; the condenser comprises a condensation serpentine channel; the evaporator is communicated with the vacuumizing / liquid injection micro-channel; a vacuumizing / liquid injection hole which can be communicated with the vacuumizing / liquid injection micro-channel is processed in the borosilicate glass sheet. The silicon-based miniature loop heat pipe cooler provided by the invention can be directly integrated with a semiconductor microelectronic chip, and therefore the temperature and the temperature gradient of the chip are effectively reduced, the 'hotspot' problem caused by local high heat flow is reduced and weakened, and the safe and reliable operation of the chip is ensured.

The invention relates to an efficient energy-saving and emission-reduction sub-system of an automobile and belongs to the technical field of machine manufacturing. By utilizing a method of recycling waste heat of tail gas of an automobile engine and controlling external circulation flow of a cooling liquid, the temperature of a system is raised to about 84-87 DEG C as far as possible and is kept; and by controlling the flow of the cooling liquid flowing through an air heat exchanger, the temperature of air entering the engine is raised and regulated to 56-75 DEG C. When the engine is in the two temperature states, fuel oil molecules are in single molecule states and can be sufficiently mixed with oxygen molecules in the air to be sufficiently combusted, thus achieving energy saving and emission reduction. When system temperature reaches 86 DEG C, a liquid pump stops rotation to stop recycling of the waste heat; and a proportional valve distributes the cooling liquid to the air heat exchanger to raise and regulate temperature of the air. When extra requirement for power is available, temperature regulation on air is stopped, and when throttle percentage reaches more than 60%, pressurizing is performed and the air is quickly cooled by utilizing cold air. In warming-up at idle speed, air-fuel ratio is gradually increased to 15.6-15.9 from 14.7 in three times.

The invention discloses an automotive storage battery installation device. The device includes a first tray, a second tray and a pressing mechanism 5 used for tightly pressing a storage battery on thefirst tray and the second tray, wherein the first tray and the second tray are used for supporting the storage battery and are arranged opposite to each other. The automotive storage battery installation device can be effectively installed on an automobile body and is great in structural stability, safe and reliable in work performance, simple in structure, less in occupied space and installationprocedures and capable of saving time and labor.

The invention discloses a two-way strand twisting device. Flywheels are respectively arranged on a main machine frame and between rotating bearing mechanisms, cradle frames are respectively arranged on the main machine frame and between the flywheels, a pay-off assembly is arranged on each cradle frame, and a wire splitting guide wheel, a wire splitting pre-deformation assembly and a wire collecting mold are sequentially arranged on the cradle frames and at the side edge parts of the pay-off assembly. The center steel wire pay-off method comprises the following steps that a center steel wire can be sequentially wound on the left and right side flywheel lower edges, the left and right side flywheel centers and the right and left side flywheel upper edges, and a plurality of fine single wires are respectively concentrated onto the wire collecting mold by the wire splitting guide wheel through the wire splitting pre-deformation assembly. The two-way strand twisting device and the center steel wire pay-off method have the advantages that the two-way simultaneous strand twisting can be realized, the twice strand twisting can be completed when the flywheels rotate for one circle in each time, the automation degree is high, the energy consumption is low, the occupied area is small, the two-way strand twisting device and the center steel wire pay-off method are particularly applicable to the fast strand twisting of fine wires, and the work efficiency is also greatly improved.

The invention discloses a delay automatic closing piece. The delay automatic closing piece comprises a shell opened at the upper part, a blocked movable piece, an upper moving driving piece arranged in the shell and driving the blocked movable piece to move up, and a compression spring for pushing the blocked movable piece to move up along central axis of the shell; the blocked movable piece, theupper moving driving piece and the compression spring are coaxially arranged with the shell; and the closing piece realize automatic delay closing actions through pushing of the movable piece to moveup through the compression spring under the internal and external pressure difference effect of a blockage piece in the shell, and is low in investment cost and safe and reliable in use process. Meanwhile, the invention further discloses a gas self-closing valve with a timing closing function; the gas self-closing valve comprises a self-closing valve body with an intake port and an exhaust port; alower opening is formed in the bottom of the self-closing valve body; the delay automatic closing piece is mounted on the outer side of the lower opening; and the delay automatic closing piece is mounted at the bottom of the self-closing valve body, so that the self-closing valve achieves the automatic timing closing function under the condition of normal working.

The invention provides a mechanical arm of an electric vehicle battery, belonging to the technical field of machinery manufacture, comprising a bracket, a lead screw pair, a linear guide rail pair, a drive motor, a lifting upright post, a rotary supporting bearing and a rail square trolley; the rotary supporting bearing is installed on the rail square trolley; the top part of the lifting upright post is connected with the rotary supporting bearing, and the bottom part of the lifting upright post is connected with the drive motor; an output shaft of the drive motor is connected with the lead screw pair; the linear guide rail pair is installed on the side of the lead screw of the lead screw pair; the bracket is installed on the lead screw pair and the linear guide rail pair; and a fine tuning lifting mechanism is installed on the bracket. The battery is pulled in the bracket to start the drive motor; the battery is lifted to the same height with that of the automobile battery box, and the bracket is aligned with the automobile battery box through the rotary supporting bearing and the rail square trolley to push the battery in the automobile battery box, and the fine tuning lifting mechanism can accurately control the lifting height of the bracket. The mechanical arm provided by the invention can realize the quick transfer load of the electric vehicle battery, especially the electric vehicle battery of a bus system; and the operation is simple, convenient, accurate and quick.

The invention discloses an engaged retaining pile. The engaged retaining pile comprises a plurality of plain concrete piles laid from front to back and a plurality of reinforced concrete piles laid from front to back. The plain concrete piles and the reinforced concrete piles are laid in a staggered mode. A pile body of each reinforced concrete pile is engaged with pile bodies of two plain concrete piles located front and back, so that the retaining effect is good. The invention further discloses a construction method of the engaged retaining pile. The construction method comprises the steps that firstly, construction of the plain concrete piles is conducted, and the multiple plain concrete piles are constructed from front to back; and secondly, construction of the reinforced concrete piles is conducted, the multiple reinforced concrete piles are constructed from front to back in the construction process of the multiple plain concrete piles, drilled hole-forming construction processes of any one of the reinforced concrete piles are conducted after the construction of the two adjacent plain concrete piles front and back is completed. The construction method is simple; the design is reasonable and the construction is simple and convenient; the construction efficiency is high and the construction effect is good. In addition, the invention discloses an application of the engaged retaining piles, namely a foundation pit retaining structure is formed by fixedly connecting the multiple engaged retaining piles tightly.

The invention relates to a portable blowing and suction machine, comprising a main unit shell, a motor arranged in the shell, a fan which is driven to rotate by the motor, a switch for controlling the rotation of the motor, a blowing and suction accessory which is connected with the main unit shell in a detachable way and a safety mutual interlocking gear arranged between the blowing and suction accessory and the main unit shell; the safety mutual interlocking gear comprises a trigger gear which can motivate a switch only when the blowing and suction accessory is connected with the main unit shell and a lock device for locking the blowing and suction accessory on the main unit shell when the motor is started; the safety mutual interlocking gear further comprises a slide block, when the blowing and suction accessory is separated from the main unit shell, the slide block can restrict the movement of the trigger gear, thus facilitating the installation and connection of the blowing and suction accessory and the main mechanism.

The invention discloses a construction technology for a long-spiral cast-in-place pile extruded into rock. The construction technology comprises the following steps: 1) embedding a pile casing: embedding the pile casing in a pile position acquired by surveying and setting out; 2) drilling a hole: downward drilling by a long-spiral pile machine and acquiring a constructed and formed hole after drilling in place; 3) lifting a drill rod and protecting a wall with slurry: upward lifting the drill rod after drilling in place till taking the drill rod out of the formed hole, adopting a grouting device and pumping the wall-protecting slurry through the drill rod during the process of upward lifting the drill rod, and protecting the wall with the slurry for the formed hole; 4) putting down a reinforced bar cage; 5) grouting concrete: performing concrete grouting construction on the constructed long-spiral cast-in-place pile extruded into rock through a concrete pumping device and a grouting guide tube. The construction technology provided by the invention has the advantages of simple steps, convenience in realization, high hole quality, good construction effect and capability of effectively solving the problems of the present construction for the long-spiral cast-in-place pile extruded into rock that the hole wall is easy to collapse, the hole is repeatedly cleaned, the construction efficiency is low, and the like.

The invention relates to a local electric rotary drilling device. The local electric rotary drilling device comprises an upper drill rod, a drill collar, an upper short joint, a local electric rotary device, a lower short joint and a drill bit, wherein the local electric rotary device is connected with the upper short joint and the lower short joint by threads; the central shaft of the local electric rotary device penetrates through from an inner barrel; a rotary outer barrel is sleeved outside the inner barrel; a connection pin is arranged between the inner barrel and the rotary outer barrel; an axial-flow hydroelectric generator, an upper electricity storage, a motor, a lower electricity storage, a piezoelectric transducer and a pressure-bearing device are sequentially installed in the inert barrel from top to bottom; the axial-flow hydroelectric generator, the upper electricity storage and the motor are sequentially connected; the lower electricity storage is also connected with the motor; the motor is connected with the central shaft and the inner barrel respectively; the pressure-bearing device is connected with the piezoelectric transducer; and the piezoelectric transducer is connected with the lower electricity storage. According to the local electric rotary drilling device disclosed by the invention, a part of the dynamic energy of a fluid is converted to electric energy and stored, then a drill tool at the bottom is driven to rotate to drill, thus the dynamic energy and pressure energy of the drilling fluid are adequately utilized, and the drilling rate is increased.

The invention discloses a quick construction formwork for a middle arch secondary lining of a separated island type underground excavation station. The quick construction formwork comprises a main support bracket (1), a support bracket and a telescopic driving device, wherein the telescopic driving device is arranged on the main support bracket (1); the support bracket comprises a plurality of first support brackets (3) which are perpendicular to the main support bracket (1) and are horizontally distributed and a plurality of second support brackets (4) which are arranged on the first support brackets (3) and are vertically and obliquely distributed upwards; the main support bracket (1) comprises a peripheral support bracket and an internal support bracket, and the telescopic driving device is arranged in the peripheral support bracket; and an auxiliary support bracket (6) is arranged below the first support brackets (3) and is connected with the first support brackets (3) through a telescopic pivoting structure (5). The quick construction formwork can automatically extend and retract according to use requirements and has the advantages of flexibility in operation, high support strength, good support effect, high applicability, labor and time saving, low cost and high construction and economic efficiency.

The invention discloses a backwash filling valve device for a filling machine. The backwash filling valve device for the filling machine comprises a filling valve head, wherein the lower part of the filling valve head is connected with a filling valve nozzle; the lower end of the filling valve nozzle is connected with a rotatable backwash valve; a liquid outlet which can be communicated with the water outlet of the filling valve nozzle is formed in one end of the backwash valve; a backwash flow channel is formed in the other end of the backwash valve; a backwash connector is arranged at one end of the backwash flow channel; the backwash connector and the liquid outlet are arranged symmetrically about the axis of a connecting shaft. The backwash filling valve device for the filling machine can perform backwash and is easy and convenient to operate, the labor intensity of workers is lightened, the washing installation time is greatly shortened, the efficiency is high, and the work performance is safe and reliable.

The invention discloses a molding device and a molding method for a long spiral extruding rock-entering cast-in-place pile. The molding device comprises a drilling device formed by assembling a drill stem and a drill arranged at the bottom of the drill stem coaxially, a lowering / lifting system, an electric rotating driving mechanism for driving the drilling device to rotate continuously, a slip casting device for grouting casting slip into molded drill holes continuously to form bored piles when the lowering / lifting system lifts the drill stem, a drilling depth / lifting height detecting unit, a pumping flow detecting unit, a controller and a parameter input unit connected with the controller. The molding method includes: 1 setting initial parameters; 2 drilling; 3 further processing after drilling is in place; and 4 lifting the drill and slip-casting simultaneously. The molding device and the molding method are reasonable in design, easy to use and operate, high in automation, easy in molding process, easy in controlling of pile quality, wide in application range and capable of solving a plurality of problems in the existing molding devices and molding methods for the long spiral extruding rock-entering cast-in-place pile.

A high-stability electric soft roller shutter door relates to electric soft roller shutter doors, comprising an actuator, a support frame, a door spindle, a roller, a door curtain, a cross beam and a door frame; driving sprockets are respectively arranged at both ends of the door spindle; the bottom of the door frame is provided with a driven sprocket; a drive chain is wound between the driving sprocket and the driven sprocket at each side; both ends of the cross beam are respectively connected with the drive chains at both sides; a spring is wound on the door spindle; one end of the spring is connected with a boosting sleeve and the other end thereof is connected with the roller; a transverse stop pin is arranged on the roller and a vertical stop pin is arranged on the door spindle. The electric soft roller shutter door can effectively prevent untight closing caused by wind force, prevent the door curtain from swaying along with the cross beam, prevent the door curtain from artificial opening arbitrarily and ensure the door curtain to be rapidly and stably opened and closed and the working performance to be safe and reliable.

The invention relates to a ground-controlled hydraulic pulsing device and application thereof, and belongs to the technical field of oil production process. The device comprises a variable frequency servo pulsing device and a constant pressure liquid supply device. The variable frequency servo pulsing device comprises a hydraulic oil tank, a oil hydraulic pump, a variable frequency servo controlling valve, and a power converter. The hydraulic oil tank is respectively connected with the oil hydraulic pump and the variable frequency servo controlling valve. The oil hydraulic pump is connected with the variable frequency servo controlling valve, and the variable frequency servo controlling valve is connected with the power converter. The constant pressure liquid supply device comprises a water storage tank, a water injection pump, and a pressure reservoir. One end of the water injection pump is connected with the water storage tank, and the other end of the water injection pump is connected with the pressure reservoir. The pressure reservoir is connected with one end of the power converter. The ground-controlled hydraulic pulsing device is placed on the ground, which is rapid and convenient for operation, maintenance and detection in field application in the construction, and the frequency of hydraulic pulse can be adjusted to adapt to different oil field environment.

The invention relates to a dual-motor screw pair direct drive type turret punch press comprising a punch. A screw is arranged in the punch, two threads different in rotation direction are formed in the upper portion and the lower portion of the screw respectively, the upper thread is matched with a first screw nut, and the lower thread is matched with a second screw nut. The first screw nut is fixedly connected with a rotor of a first servo motor, and the rotor of the first servo motor and a stator thereof are mounted on an upper box body in a matched manner. The second screw nut is fixedly connected with a rotor of a second servo motor, and the rotor of the second servo motor and a stator thereof are mounted on a lower box body in a matched manner. The bottom of the screw passes through a bearing end cover to be connected with a punch body. The dual-motor screw pair direct drive type turret punch press has the advantages of safety, stability, reliability, high cost performance and improvement in static and dynamic performance.

The invention discloses a duplex three-gear inner gearing compound motor pump driven by a switch flux motor. A motor rotor adopts a hollow structure; a first pump body composed of a first outer gear ring, a first pinion and a first partition board and a second pump body composed of a second outer gear ring, a second pinion and a second partition board are embedded in the motor rotor; the first pump body and the second pump body adopt inner gearing compound gear pumps and are connected in parallel to form a double-pump structure; the double-pump structure adopts the manner of oil feeding at two ends and oil discharging at one end; one side of each pump body is provided with an oil feeding oil distribution disc and an oil feeding end cover; an oil discharging oil distribution disc is arranged between two pump bodies. According to the invention, the pump bodies are embedded in the switch flux motor, so that the pumping capacity is increased, the pump flow pulsation is reduced, and the characteristic of high-pressure mass flow is easy to realize to enable the working performance to be safe and stable.