34results about How to "Realize the function of holding pressure" patented technology

The invention discloses a staring auxiliary system and method of an automatic gearbox ramp. The staring auxiliary system comprises an automatic gearbox control unit, a braking air chamber, a braking pedal, a vehicle air cylinder, a two-position two-way solenoid valve, a check valve, a first pressure switch, a second pressure switch and a tilt angle sensor; the two-position two-way solenoid valve, the check valve, the first pressure switch, the second pressure switch and the tilt angle sensor are electrically connected with the automatic gearbox control unit; the vehicle air cylinder is used for providing a braking air source for the braking air chamber; the braking pedal is used for controlling unblocking and blocking of a channel formed between the vehicle air cylinder and the braking air chamber; the two-position two-way solenoid valve is arranged on an air pressure pipeline which is arranged between the braking air chamber and the braking pedal; the two pressure switches are arranged between the braking air chamber and the two-position two-way solenoid valve and between the two-position two-way solenoid valve and the braking pedal respectively; the check valve is in air circuit parallel connection with the two-position two-way solenoid valve; the tilt angle sensor is independently arranged on a vehicle body or at the chassis bottom of an automobile; the two pressure switches are used for sending out the same signal when the braking pedal brakes and also used for sending out different signals when the braking pedal resets.

The invention provides an array-type internal support fixture and a flexible clamping method for large-scale spherical crown thin-walled parts, and belongs to the technical field of clamping. The array-type inner support fixture is composed of a hydraulic drive system, a positioning clamping device and an auxiliary device. The hydraulic drive system is used to drive the hydraulic cylinder to move, and then drive the movement of the rubber plate to realize the inner support clamping. The invention adopts the method of combining the inner tire membrane with the automatic support, the structure is simple, the automatic inner supports are arranged in an array, and each group of automatic inner supports is a separate action, which can adapt to the inner surface of a relatively complex workpiece and achieve close fit with it; at the same time, it adopts The pressure plate and the pressure ring assist in clamping the upper and lower unprocessed areas of the workpiece, which can ensure the overall rigidity of the workpiece; the clamping and loosening of the clamp is controlled by the connecting valve, which is convenient to operate, realizes the function of maintaining pressure and saves costs; the invention realizes Flexible, fast and reliable clamping of spherical crown thin-walled parts.

The invention relates to a spring-controlled micropump for artificial anal sphincter in the technical field of medical devices, wherein: one end of a first spring is fixed on a nut, and the other end is fixed on a first pressing plate, and the first spring compresses the first pressing plate so that The first pressing plate compresses the fourth medical catheter branch pipe and the second medical catheter branch pipe on the end face of the micro-motor, and separates the fourth medical catheter branch pipe and the second medical catheter branch pipe. One end of the second spring is fixed on the nut, and the other end is fixed on the second pressure plate. The second spring compresses the second pressure plate, so that the second pressure plate compresses the first medical catheter branch pipe and the third medical catheter branch pipe in the outer shell, and the first medical catheter branch pipe is cut off. Catheter branch and third medical catheter branch. Control the translational direction of the nut, compress or stretch the first spring and the second spring, realize bidirectional liquid discharge between the first container and the second container, and realize the function of maintaining pressure at any position.

The invention relates to a magnetically controlled artificial anal sphincter system in the technical field of biomedical engineering. Wherein: the first magnet and the second magnet are connected as a whole through the first coupling rod, the first nut is installed between the first magnet and the second magnet, moves between the first magnet and the second magnet, and pushes the first magnet and the second magnet to control the conduction and disconnection of the first medical catheter and the second medical catheter. The third magnet and the fourth magnet are connected as a whole through the second coupling rod, and the second nut is installed between the third magnet and the fourth magnet, moves between the third magnet and the fourth magnet, and pushes the third magnet and the fourth magnet. The four magnets control the conduction and disconnection of the third medical catheter and the fourth medical catheter. The invention realizes active control of two-way liquid discharge between the clamping bladder and the liquid storage bladder, and realizes the pressure maintaining function in any working cycle.

An internal meshing cycloidal gear type hydraulic transformer comprises a casing (1), an eccentric sleeve (2) internally arranged on the casing (1), an internal meshing cycloidal rotor pair (3) sleeved with the eccentric sleeve (2) as well as an upper end cover (4) and a lower end cover (5) which are connected on two sides of the casing (1) through bolts (6) respectively. The hydraulic transformerhas the beneficial effects as follows: the hydraulic transformer has the remarkable advantages of small size, low weight, simple structure, easiness in manufacturing, high compression frequency, small flow pulsation, stable running and multiple functions, and for the cycloidal gear type hydraulic transformer with the position of a flow distributing barrier between an unloading oil opening and a pressurizing oil opening fixed, different pressurization or depressurization ratios can be realized through exchange of the unloading oil opening and the pressurizing oil opening.

The invention relates to the technical field of earphones, in particular to a pressure-maintaining device and method for maintaining pressure on a cable on an earphone shell. The positioning and pressure-maintaining devices are evenly arranged on the rotating disk at intervals in the circumferential direction; the positioning and pressure-maintaining device includes a positioning mechanism and a heating and pressure-maintaining mechanism; The assembly moves toward the first positioning assembly, and abuts with the cable installed on the earphone shell, and then maintains the pressure of the cable through the pressure maintaining assembly; the rotating disk in the present invention is evenly arranged with at least three positioning protection at circumferential intervals. pressure device, which improves the space ratio of the equipment and the efficient utilization of the equipment; at the same time, the positioning and pressure-holding device maintains the pressure of the cable as the rotating disk rotates; this reduces the need for other stations when the cable is maintained in the earphone shell The situation of waiting has shortened the production cycle and improved the production efficiency.

The invention provides a control valve and an electric pressure pot provided with the valve. The control valve comprises a base and a valve deck. The base and the valve deck form a valve cavity. The base is provided with a valve element hole and an exhaust hole which are communicated with the valve cavity. A valve element is arranged in the valve cavity. One end of the valve element extends out of the valve element hole of the base. A valve element gasket used for sealing the exhaust hole is arranged on the portion, close to the valve element hole, of the valve element. The valve deck is provided with a through hole communicated with the valve cavity and a limiting rib used for blocking movements of the valve element. The valve deck is provided with two stations. When the valve deck is located at the first station, the valve element is blocked by the limiting rib, and the valve element gasket is far away from the exhaust hole; when the valve deck is located at the second station, the limiting rib is far away from the valve element, and the valve element gasket plugs the exhaust hole. Or, when the valve deck is located at the first station, the valve element is blocked by the limiting rib and the valve element gasket plugs the exhaust hole; when the valve deck is located at the second station, the limiting rib is far away from the valve element. By means of cooperation of the valve element, the valve element gasket, the exhaust hole and the valve deck, the control valve can achieve the sealing and ventilation functions.

The invention relates to a blast furnace blower lubricating oil emergency supplementing and pressure maintaining system, and belongs to the field of electromechanical integration. The system comprisesan emergency oil storage device and an on-off device, wherein the emergency oil storage device comprises an oil storage tank and an oil supplementing tank capable of supplementing the oil storage tank with oil; a liquid level meter is arranged on the oil storage tank; the oil storage tank communicates with an external compressed air source; set air pressure is kept inside the oil storage tank; and the pressure value of the set air pressure is greater than that of the lowest oil pressure in a lubricating oil pipeline. The equipment is pneumatically propelled and rapid in response, so that therapid supplementing and pressure maintaining requirements can be completely met; when a mother tube is supplemented with lubricating oil, the explosive force can be greater and the pressure maintaining function can be achieved; and by the utilization of the combined linkage action of a liquid level switch and the on-off device, the oil output from the oil storage tank can be automatically cut offand the air-in-oil accident caused by the entry of low-liquid-level air into the oil pipeline can be prevented.

The invention provides an antiriot vehicle-stopping device. The antiriot vehicle-stopping device comprises a supporting unit capable of being installed below the ground, a bearing unit capable of rotating around one end of the supporting unit and an anti-collision unit vertically arranged at the bottom of the other end of the bearing unit and used for preventing vehicle collision. The top end of the anti-collision unit is connected with the end of the bearing unit, a driving unit is arranged at the bottom of the bearing unit and can drive the bearing unit to rotate around one end of the supporting unit, and the rotating bearing unit drives the anti-collision unit to ascend vertically. The antiriot vehicle-stopping device is easy to operate, practical and capable of being rapidly started within short time and effectively stopping invasion vehicles.

The invention relates to a micro-peristaltic pump for an artificial anal sphincter system in the technical filed of medical appliances, which comprises a first container, a connecting pipe, a rotating shaft, a motor, a speed reducer, rollers, a second container and a sleeve, wherein the first container is connected with the connecting pipe, and the connecting pipe is connected with the second container by penetrating through the sleeve; the two rollers are symmetrically arranged at the two sides of the motor, and divide the connecting pipe into two parts which are not communicated with each other, and the rollers are connected with the rotating shaft; and the rotating shaft is connected with the motor in a meshed way. The invention realizes the two-way drainage between a clamp sac and a liquid storage sac, and can realize the pressure holding function in any position.

The invention relates to an electronic mechanical brake, an electronic control pressure-maintaining mechanism thereof and a pressure-maintaining method. The electronic control pressure-maintaining mechanism comprises a motor, a self-locking nut and a gear hobbing sliding block, wherein the motor is connected with the self-locking nut; the self-locking nut is driven to move forward and backward respectively through forward rotation and reverse rotation of the motor; the gear hobbing sliding block is fixed on the self-locking nut and moves along with the movement of the nut; and the gear hobbing sliding block is provided with an occlusion device which is used for being mutually occluded and locked with an occlusion device of a brake motor.

The invention relates to a pressure-maintaining type automatic internal support fixture and a clamping method, which belong to the technical field of clamping, and relate to a pressure-maintaining type automatic internal support fixture and a clamping method. The internal support fixture is composed of a positioning clamping device, an auxiliary device, and a hydraulic drive system. The clamping method clamps the workpiece vertically, uses the hydraulic system to deliver the hydraulic oil to the clamping chamber and the loosening chamber, drives the piston to move, and then makes the inner expansion sleeve move radially to prop up the workpiece. The inner expansion sleeve is multi-lobed, and the side is serrated. Adjacent inner expansion sleeves can be meshed. The structure is simple, which can achieve uniform tension and improve the local rigidity of the workpiece. The combination of claws and rubber plates is used to provide auxiliary support for the upper and lower unprocessed areas of the workpiece to ensure the overall rigidity of the workpiece. The connection valve is used to control the clamping and loosening of the fixture, and the operation is convenient. The connecting valve can keep the clamping path without pressure leakage for a long time after the oil pressure source is cut off, and realize the pressure maintaining function. It can realize flexible, fast and reliable clamping of thin-walled cylindrical parts.