35results about How to "Increase or decrease in pressure" patented technology

The invention discloses portable flexible walking assisting equipment. The portable flexible walking assisting equipment comprises knee joint flexible actuating mechanisms (1), air pressure forming mechanisms (2), flexible fixing bands (3) and air pipes (4). In the walking process of a person, the air pressure forming mechanisms (2) make the air pressure of air bags of the knee joint flexible actuating mechanisms (1) rapidly increased or decreased, and the knee joint flexible actuating mechanisms (1) generate torque assisting the knees in bending and stretching. The weight of the person is adopted as the driving force of the equipment, and no other additional energy is needed; the flexible driving mode combining the pneumatic driving force of the air bags and the elastic force of torsion springs is adopted for the actuating parts, and the pneumatic driving force and the elastic force compensate for each other in the walking process of the person. By adopting the flexible driving mode combining the pneumatic driving force and the elastic force of the torsion springs, the structural inertia is small, the defects that a rigid mechanism like a common leg assistance device or an exoskeleton robot is large in inertia, likely to injure the knee joints of a person, poor in comfort and the like are overcome, and the safety and comfort of the equipment are improved.

The invention relates to a heavy-duty isothermal forging hydraulic press, which comprises an upper transverse beam, a lower transverse beam, upright posts, a main cylinder, side cylinders and a slide block, wherein an upper baseplate is fixed on the lower plane of the slide block; and a movable workbench is arranged on the lower transverse beam. The heavy-duty isothermal forging hydraulic press is characterized in that the upper transverse beam and the lower transverse beam form a combined beam body structure; leveling cylinders are fixed on the four corners of the upper end of the upper transverse beam and the upper end of the lower transverse beam; each leveling cylinder is provided with an independent leveling control system; an upper knock-out device is arranged on the slide block; movable workbench positioning mechanisms are arranged on the lower part of the movable workbench body and in the lower transverse beam; and the movable workbench body is further provided with a movable workbench clamping device. The heavy-duty isothermal forging hydraulic press is characterized in that a combined transverse beam is light in weight and is convenient to transport and produce, and the manufacturing cost can be reduced; a leveling effect is achieved via the leveling cylinders, the leveling response time is shortened, and energy is saved greatly; through the upper knock-out device, successful demolding of workpieces can be realized, and the workpiece forging and pressing quality is ensured; and accurate positioning and stable running of a press workbench can be realized, and the production requirement of forging equipment for heavy-duty aviation forgings is met.

An umbrella valve dedicated for use in a piezoelectric pump. Among micropump pump valves are actuation source-less valve, piezoelectrically actuated valve, thermally actuated valve, memory alloy valve, and piezoelectric valve, all of which have a certain shortcoming, for instance, the valves have complex structures and increased manufacturing costs, some provide a product with poor consistency and poor air-tightness. The umbrella valve dedicated for use in the piezoelectric pump structurally consists of the umbrella valve (A1) and a valve frame (A3). A valve rod of the umbrella valve is passed through and arranged at a central through hole of the valve frame. Distributed around the central through hole of the valve frame is a flow-pass through hole (6). The flow-pass through hole correspondingly matches the opening and closing of the umbrella valve that is opened. The umbrella valve is provided with characteristics of a simple structure, increased sensitivity, great sealing effect, reduced manufacturing costs, and great operational performance, and is applicable in the fields and scenarios of various fluids, comprising gases, water, and specifically liquids, such as in water processing, chemical engineering analysis, medical equipment, biomedicine, and automatic control.

The invention relates to a processing device for dip-coating waterproof rolls, which comprises a material pool and base fabric, the material pool is filled with coating, the side wall of the material pool and/or the bottom of the material pool are provided with a heating mechanism, the material pool is internally provided with a material delivering roll pair formed by an upper material picking-up roll and a lower material picking-up roll, the upper material picking-up roll is positioned above the coating, part of the lower material picking-up roll is soaked in the coating, the upper material picking-up roll and the lower material picking-up roll move in same direction or in opposite directions, the coating is delivered to the upper material picking-up roll through the lower material picking-up roll, and the base fabric is in connection with the surface of the upper material picking-up roll. One end of the material pool is a material inlet end which is provided with a guiding roll and a tensioning roll, and the guiding roll and the tensioning roll are positioned above the coating and are connected with a lifting mechanism; and one end of the base fabric is connected with the upper material picking-up roll after sequentially passing through the guiding roll and the tensioning roll. The invention has the characteristics of simple and reasonable structure, small whole machine volume and occupation, flexible operation, low manufacturing cost, low energy consumption, high production efficiency and wide application range.

The invention discloses a flexible mechanical arm and a control method thereof and aims at achieving the effects that the flexible mechanical arm can be simple in structure, and the structure can be changed so as to adapt to various environments. According to the technical scheme, the flexible mechanical arm mainly comprises a hand-shaped body, a driving assembly and a control assembly, when the pressure of an elastic cavity in the hand-shaped body is changed, the elastic cavity is bent or is changed from the bent state to the straightened state, due to the fact that the elastic cavity can have deformation, when an execution body abuts against a contact object, the execution body can have self deformation so as to be adapted to the contact object, and the driving assembly for controlling the pressure in the elastic cavity is arranged, so that the pressure in the elastic cavity is increased or decreased, and precise detection and control are achieved through the control assembly.

The invention discloses a spring type multi-gear pressure-limiting valve with the pressure adjustable and aims at achieving the effects that the spring type multi-gear pressure-limiting valve with the pressure adjustable is simple in structure, safe, stable and convenient to use and capable of satisfying various cooking requirements of consumers. The spring type multi-gear pressure-limiting valve comprises a valve seat (1), an exhaust pipe (2) and a pressure adjusting mechanism, the pressure adjusting mechanism comprises a lower valve element (3), an upper valve element (4), a rotary cover (5) and a pressure limiting spring (6), the lower valve element (3) is sleeved with the upper valve element (4) and provided with multiple valve element grippers, sliding grooves are formed in the inner wall of the upper valve element (4), multiple groups of step clamping positions are evenly distributed on the outer wall of the upper valve element (4), an inner ring seat is arranged on the valve seat (1), an air outlet of the exhaust pipe (2) is located inside the inner ring seat, and multiple valve seat clamping pillars are arranged on the inner wall of the inner ring seat. The spring type multi-gear pressure-limiting valve is applied to the technical field of pressure-limiting valves.

The invention discloses a roller printing machine, belonging to the technical field of printing and dyeing. The roller printing machine comprises a printing machine base, a lead screw, a feed rod, a driving nut, a lower crossbeam, a lower printing roller, an upper crossbeam, an upper printing roller, a motor and a feed rod fine adjustment mechanism, wherein the rapid adjustment and accurate adjustment of the distance between the lower printing roller and the upper printing roller can be realized by the feed rod fine adjustment mechanism through the screw-thread fit between the lead screw and the driving nut; a driven roller is arranged on the lower crossbeam of the roller printing machine of the embodiment; a pressure sensor and a piezoelectric signal converter are arranged on the upper crossbeam; and the distance between a driving roller and the driver roller can be automatically adjusted according to the thickness of raw materials to be processed and the requirements of printing and dyeing pressure, thereby realizing the self-adaptive adjustment of pressure in the printing and dyeing process, improving the poor printing and dyeing layering of the roller printing machine and avoiding the phenomenon of defective goods such as uneven printing colors.

The invention relates to a heavy-duty isothermal forging press with a four corner leveling function. The heavy-duty isothermal forging press with the four corner leveling function comprises an upper transverse beam, a lower transverse beam and a stand column which are connected through tie rods and lock nuts to form an integrally stressed frame body, wherein the upper transverse beam is fixed with the bottoms of a main cylinder and a side cylinder, piston ends of the main cylinder and the side cylinder are fixedly installed with a sliding block, an upper cushion plate is fixedly arranged on a lower plane of the sliding block, and a movable workbench is installed on the lower transverse beam. The heavy-duty isothermal forging press with the four corner leveling function is characterized in that upper leveling cylinders are fixedly arranged at four corners of the upper transverse beam, lower leveling cylinders are fixedly arranged on the lower transverse beam at positions corresponding to the upper leveling cylinders on the upper transverse beam, and each of upper leveling cylinders and lower leveling cylinders has an independent leveling control system. The heavy-duty isothermal forging press with the four corner leveling function has the advantages that since the pressure of the leveling cylinders at a certain corner of the sliding block is controlled to be increased or decreased through a control loop and the leveling cylinders at the opposite corner are simultaneously controlled, the levelness of the sliding block in the downward forging process is guaranteed; not only can the leveling response time be shortened and can the sliding block leveling accuracy and production efficiency be improved, but also the loss of the main tonnage of a hydraulic press can be avoided, the energy can be greatly saved and the production cost is reduced.

The invention discloses a model exhibition platform for technology promotion, and belongs to the technical field of display technology. The model exhibition platform for technology promotion includesa lower platform body, the side face of the lower platform body is a hemispherical hook face, the bottom of the lower platform body is horizontal, the top of the lower platform body is provided with atransparent cover body, the top of the lower platform body is provided with a cavity, the inner bottom wall of the lower platform body is provided with an adsorption structure, a support plate is arranged in the cavity, the bottom of the support plate is provided with a supporting rotation structure, the inner bottom wall of the cavity is fixedly provided with a drive structure, four uniformly distributed strip-type limit holes are formed in the support plate, and the portion, located at the end away from the strip-type limit holes, on the support plate is provided with a spring accommodationgroove. The platform can fix a model, the model can be effectively prevented from toppling and breaking, the model cannot be damaged due to toppling at the time of displaying, and the display effectof the model is effectively ensured.

The invention provides a method and system of controlling a thermodynamic system in a vehicle. The vehicle has a vehicle system with a waste heat fluid. An expander, a condenser, a pump, and an evaporator are provided in sequential fluid communication in a thermodynamic cycle containing a working fluid. The evaporator is configured to transfer heat from the waste heat fluid to the working fluid. At least one valve adjacent to the pump is controlled to control fluid flow through at least one chamber to maintain a pressure of the fluid at a pump inlet at a threshold pressure above a saturated vapor pressure associated with a temperature at a condenser outlet when ambient temperature varies.

The invention discloses a workbench suitable for a machine tool. The workbench comprises a bottom frame, two fixing piles, a workbench body, rotating seats, an upper positioning table, a lower damping table, a deviation measuring assembly and an alignment assembly, wherein the two fixing piles are arranged on the bottom frame, the workbench body is inserted between the two fixing piles, the rotating seats are arranged on the side edges of the fixing piles and penetrate through the fixing piles to be connected with the workbench body, the upper positioning table is used for fixing a workpiece, the lower damping table is arranged on the side, not stressed, of the upper positioning table, the deviation measuring assembly is arranged at the bottom of the lower damping table and is used for detecting the inclination degree of the workbench body, and the alignment assembly is arranged on the side surface of the workbench body and corresponds to the movement direction of a machining shaft head of the machine tool. If the workbench body is displaced due to vibration or other external force factors, the pressure on the deviation measuring assembly can be increased or reduced, then the deviation direction of the workbench body can be judged, then the deviation displacement of the workbench body can be obtained through the increased or reduced pressure, so that the workbench body can be rapidly stopped and adjusted once the workbench body is deviated, and the machining precision of the workpiece is improved.

The invention relates to a fluid transportation pump, in particular to a pressure control device of the fluid transportation pump. The pressure control device is arranged in a fluid medium output channel and is close to a sealing cavity formed by a pump cover and a pump body; the pressure control device is sequentially sleeved with a fixing sleeve and a pressure rod from outside to inside; the pressure rod reciprocates in the fixing sleeve; the fixing sleeve is partially embedded in a blind hole formed in the pump body; a spring for pushing the pressure rod to reset is further arranged betweenthe fixing sleeve and the pressure rod; the pressure rod is sleeved with the spring; the other end of the pressure rod is sleeved with an end cover; the end cover is connected with the fixing sleeveand is used for limiting and abutting against the spring; a through hole for reciprocating through the pressure rod is formed in the middle of the end cover; a blind hole is further formed in the tailof the pressure rod; and a magnet is arranged in the blind hole. By the aid of the pressure control device, the whole machine is controlled to shut down and stop operation under the high pressure, sothat the safety is increased, and the energy saving and environmental protection effects are achieved.

The invention relates to the technical field of vehicle-mounted instrument panels, in particular to an automobile instrument panel capable of shielding sunlight based on spring damping. The automobile instrument panel comprises a cushioning and light-shielding mechanism, the cushioning and light-shielding mechanism at least comprises a cushioning device, the cushioning device comprises a cushioning plate, a pressure plate is arranged over the cushioning plate, end connecting mechanisms are arranged at the ends of the pressure plate and the cushioning plate, each end connecting mechanism comprises a transverse rod, and the surface of each transverse rod is sleeved with an end pressure-buffering spring; and a light-shielding device which comprises a light-shielding shielding plate, a transverse plate is arranged at one end of the top of the light-shielding shielding plate, an adjusting mechanism is arranged at one end of the light-shielding shielding plate and comprises a cam, a guide rod is arranged at one end of the top of the cam, supporting blocks are arranged at the two ends close to the bottom surface of the cam, and a fixed motor is rotationally connected to one end of the cam. The arranged cushioning device can play a preliminary cushioning role on the instrument panel, and meanwhile, the light shielding device can block light rays irradiated into the instrument panel.

The invention discloses a plug-in brush holder brush box and a mounting method thereof, and relates to the field of motor brush holder brush boxes, the plug-in brush holder brush box comprises a brush box, a brush holder and a brush carrier, the inner wall of the brush box is fixedly connected with a plurality of groups of connecting feet, connecting grooves are formed in the connecting feet, two opposite groups of connecting grooves are uniformly provided with heating deformation bins on the opposite surfaces of the inner walls, and the heating deformation bins are connected with the brush box. The top end of the inner wall of the brush holder cavity is fixedly connected with a hollow fixing column, the lower end of the fixing column is slidably connected with a top column, the bottom end of the top column is connected with the top end of a carbon brush seat movably arranged in the brush holder cavity, the top end of the top column is provided with an adjusting spring in the fixing column, and the top end of the adjusting spring is in contact with a bottom foot of a screw. The screw rod is in threaded connection with the top end of the brush holder and the upper part extends out of the brush holder. According to the invention, the efficiency of replacing the carbon brush is greatly improved, the brush box and the brush holder can be in stable contact when the motor works, and the purpose of conveniently increasing or reducing the pressure between the carbon brush and the collector ring is achieved.

The invention provides a high-precision water level measuring device of a water level gauge and belongs to the technical field of water level indicators. The device comprises a display cylinder arranged on one side of a furnace body and forming a communicating vessel structure with the furnace body, an observation port is formed in the side wall of the display cylinder, a second pressure gauge used for detecting the internal pressure of the display cylinder is arranged outside the display cylinder, and display glass is arranged at the observation port. The device disclosed in an embodiment ofthe invention has the advantages of convenience in use and high measurement precision; the liquid level of the furnace body can be accurately measured in real time according to the pressure change inthe furnace body; the driving assembly is controlled by the controller to drive the first driving rod, the second driving rod and the pressing plate to move up and down, so that the pressure in the display cylinder is increased or reduced, the pressure in the display cylinder is always equal to that in the furnace body, the liquid level in the display cylinder is equal to that in the furnace body,and the display precision of the display cylinder is improved.