33results about How to "Achieve alternation" patented technology

The invention discloses a laminating type piezoelectric brake adopting a flexible amplifying structure and a working method thereof. The piezoelectric brake comprises a non-rotation part, a brake support, a circular ring, a key, a brake disk and a rotating part, wherein the brake support, the circular ring, the key, the brake disk and the rotating part are installed in the non-rotation part. The circular ring is located in the non-rotation part, the inner circle of the circular ring and the brake support are connected through the key and located, and the inner circle of the brake disk and the outer circle of the circular ring are in clearance fit. The rotating part is installed on the circular ring and fixedly connected with the brake disk. The laminating type piezoelectric brake adopting the flexible amplifying structure further comprises laminating piezoelectric ceramic embedded in the circular ring, a wedge arranged on one side of the laminating piezoelectric ceramic and used for providing the pretightening force, and an isosceles triangle displacement amplifying structure used for amplifying and controlling extension displacement of the laminating piezoelectric ceramic. The laminating type piezoelectric brake adopting the flexible amplifying structure has the advantages of being small in size, easy to process, assemble and use, fast in response, easy to control and the like, and electromagnetic interference is avoided.

The invention discloses a packing device for a woven bag, which comprises a jaw slide block horizontally slidably arranged on a machine frame, an upper jaw and a lower jaw are arranged on the jaw slide block, and the upper jaw and the lower jaw can interact with each other. Close to, away from, the upper jaw and the lower jaw all include at least two parallel cantilever jaws, and the cantilever jaws are parallel to the sliding direction of the jaw slider; a woven bag support is provided in the direction pointed by the cantilever jaws, and the weaving The height of the bag support meets the requirements of the upper and lower jaws to clamp the stacked woven bags and move them laterally to the woven bag support, and the woven bag support does not interfere with the cantilever claws; a pressing mechanism is arranged above the woven bag support , the pressing mechanism goes down, and can press on the woven bag from the position between the adjacent cantilever claws of the upper jaw, and the woven bag is provided with an annular packing belt around the moving track above the woven bag support. The invention has the advantages of high packing efficiency, high degree of automation and high safety.

The invention relates to the field of shield machine grouting construction, in particular to a programmable automatic control grouting pump for a shield machine, which includes a support, a discharge mechanism, a material suction mechanism, a delivery cylinder mechanism, a water tank, a pumping oil cylinder and Hydraulic control valve group, the discharge mechanism, material suction mechanism, conveying cylinder mechanism and pumping cylinder are all symmetrical double-set structures; the hydraulic control valve group controls the action of the discharge mechanism and the material suction mechanism, and the hydraulic control valve group controls The pumping oil cylinder drives the conveying cylinder mechanism to reciprocate to realize mortar suction and pumping. The programmable automatic control grouting pump for the shield machine of the present invention can be independently controlled and logically controlled by programming, etc., and has a high degree of automation; and the hydraulic pressure The control valve group has a compact structure, occupies less space, and has fewer components to save costs; it can not only be used for synchronous grouting and bentonite transportation in shield construction, but also can realize alternate and continuous working conditions of double pumping systems. very broad.

The invention provides a pull-type metal wall surface working wall-climbing robot. The pull-type metal wall surface working wall-climbing robot comprises a pulling mechanism and a climbing mechanism. The climbing mechanism is suspended on a metal wall surface by the pulling mechanism through pulling ropes. The horizontal displacement of the robot is completed through walking of a pulling car, the vertical displacement of the robot is completed through the pulling ropes and a rack and pinion mechanism, an obstacle crossing function of the robot is achieved through up-down displacement of a foot mechanism, and an adsorption function of the robot is achieved through electromagnets. The pull-type metal wall surface working wall-climbing robot has the characteristics of being large in load capacity, high in obstacle crossing capacity and the like.

The invention discloses an intelligent blackboard, belongs to the technical field of efficient utilization of mechanical blackboards, and aims at solving the problems that two blackboards cannot be alternately used and cannot be automatically erased. The intelligent blackboard comprises an erasing system and a switching system, wherein the switching system and the erasing system are fixed on the wall respectively; the erasing system comprises a moving unit and a centrifugal telescopic unit; the moving unit enables a long rod erasing head to move in the vertical and horizontal directions; the centrifugal telescopic unit enables the long rod erasing head to perform telescopic movement on the blackboard in the normal direction; the switching system enables the positions of a front-end blackboard and a rear-end blackboard to be switched; the long rod erasing head can be in contact with the front-end blackboard and the rear-end blackboard. The intelligent blackboard has the advantages that the two blackboards can be alternated, and the fixed area of the blackboard can be automatically erased by virtue of the cooperation of a singlechip microcomputer and peripheral equipment; the blackboard can be quickly, sanitarily, accurately and efficiently erased, and the maximum using efficiency is obtained.

The invention discloses a dry and wet type cyclic magnetic separation method. A dry type magnetic separation method comprises the steps of a, grinding ores; b, performing pre-screening; c, performing reducing roasting; d, feeding materials; e, performing magnetic separation through an upper magnetic separation barrel; f, enabling the upper magnetic separation barrel to rotate to clean a storehouse; g, performing magnetic separation through a lower magnetic separation barrel; h, enabling the lower magnetic separation barrel to rotate to clean the storehouse; i, performing cyclic reciprocating magnetic separation; and j, rotating to discharge slag. A wet type magnetic separation method comprises the steps of a, cleaning impurities; b, performing filtering and pre-screening; c, feeding materials; d, performing magnetic separation through an upper magnetic separation barrel; e, enabling the upper magnetic separation barrel to rotate to clean a storehouse; f, performing magnetic separation through a lower magnetic separation barrel; g, enabling the lower magnetic separation barrel to rotate to clean the storehouse; h, performing cyclic reciprocating magnetic separation; and i, rotating to discharge slag. The device adopts a unique double-barrel circulating structure; when the circulating structure rotates to different positions under the driving of a driving device, river sand or metal mortar can be cyclically separated between the two hollow barrels. The whole process of the method is automatically controlled by a circuit, so that the waste of human resources is reduced, and the problems that a separation method is complicated, a separation process is long and the like are solved.

The invention provides a body building boat, and belongs to the field of body building equipment. The body building boat comprises a main boat body. A push-pull driving device, a rotary driving device, a first transmission device and a second transmission device are arranged in the main boat body. The push-pull driving device is connected with an input shaft of the first transmission device. The rotary driving device is connected with an input shaft of the second transmission device. A conversion device is arranged at one end of a spindle of the main boat body and can be connected with an output shaft of the first transmission device or an output shaft of the second transmission device. The other end of the spindle is connected with a driver of the main boat body. According to the body building boat, alternating of three exercising actions such as hand rocking, foot treading and pushing and pulling is effectively achieved, the shoulders, arms, legs, back, abdomen, waist and the like can be effectively exercised, the exercising effect is improved, and meanwhile a user can take exercise for a long time or long distance through the body building boat.

The invention discloses a wet-type circulation magnetic separation method which includes the following steps of a. washing and impurity removing; b. filtering and pre-screening; c. feeding; d. first-time magnetic separation; e. first-time opening and closing of (crescent) slurry leaking holes; f. first-time rotating spraying water recycling; g. second-time magnetic separation; h. second-time opening and closing of (crescent) slurry leaking holes; i. second-time rotating spraying water recycling; j. circulation reciprocating magnetic separation; k. rotating slagging; l. reverse floatation. The device adopts a unique double-cone circulation structure. When the circulation structure rotates to different positions under the drive of the driving device, and river sand or metal slurry can be separated in the two hollow cones in a circulation mode. The whole process is automatically controlled by a circuit, human resource waste is reduced, the problems of complex separation method and long separation process are solved, and the effectiveness of the magnetic separation is improved.

The invention discloses a home environment monitoring device and method based on the Internet of Things, and relates to the field of environmental monitoring; in order to solve the problem of low gas analysis efficiency of existing devices; the device specifically includes a main frame, and the top outer wall of the main frame is fixed It is connected with a control terminal, and the inside of the main frame is fixedly connected with a looping mechanism, and the outer wall of the bottom of the main frame is fixedly connected with a video component, and the looping mechanism includes an inner frame and six split components. In the present invention, the main frame is set, the power motor is started, the mandrel is driven to rotate, the connecting column is driven to rotate through the sleeve, and the partition assembly is driven to rotate, wherein the six partition assemblies divide the inner wall space of the inner frame into six regions, and each region can be independently The gas is stored and analyzed by the analyzer. At the same time, through the continuous operation of the power motor, the analyzed gas can be sent out through the gas flow pipe, realizing the alternation of relatively closed and flowing gas, and improving the efficiency of data collection.