14results about How to "Prevent reversal" patented technology

The shutdown of a compressor (10) installed in a refrigerant circuit (2) in air conditioning or refrigeration system is controlled so as to prevent unpowered reverse rotation of the compressor. Prior to terminating electric power to the compressor drive motor (24), the pressure within the system is relieved and substantially equalized across the compressor, thereby eliminating the possibility of unpowered reverse rotation of the compressor at shutdown. Pressure relief and equalization may be achieved by reducing the operating speed of the compressor to a low forward speed for a period of time prior to deenergizing the compressor drive motor. Pressure equalization may also be achieved by driving the compressor in reverse rotation prior to deenergizing the drive motor.

The application provides a multifunctional therapeutic instrument for migraine relief, which comprises a treatment frame, a slidingly installed mounting seat arranged on the treatment frame, a first hot compress pad arranged on the mounting seat, a fixed shell arranged on the treatment frame, a connecting hole arranged on the fixed shell, a movable frame arranged in the fixed shell, a connecting shaft arranged on the movable frame, the connecting shaft being rotatably arranged in the connecting hole, a sliding frame arranged in the movable frame, a mounting rod slidably arranged in the sliding frame, a pressing plate hingedly arranged at one end of the mounting rod, and a second hot compress pad arranged on the bottom surface of the pressing plate. The therapeutic instrument can effectively relax the tense muscles and nerves of the head and neck through the form of hot compress on the back of the neck and the forehead, so as to achieve the effect of relieving migraine, and the position of the hot compress pad can be conveniently adjusted for different people, and the hot compress pad is not easy to be separated.

The application discloses an automatic conveying line and relates to the technical field of automatic equipment, which comprises a frame, a plurality of working boxes arranged on the frame, sliding rails installed on the frame and penetrating through the working boxes, a plurality of sliding blocks uniformly arranged on the sliding rails, a same driving mechanism drivingly connected with the sliding blocks, the driving mechanism driving the sliding blocks to slide along the sliding rails, support rods rotatably installed on the sliding blocks, products to be conveyed fixedly installed on the top of the support rods, rollers fixedly installed at the bottom of the support rods and friction belts selectively installed on the frame and abutting against the rollers in one or more working boxes. The automatic conveying line has the advantages that the same driving mechanism is used to drive the plurality of sliding blocks, so that the investment in the driving device is reduced; the rollers and the friction belts are arranged, so that no additional power is needed when the products to be conveyed are rotated in the conveying process; one conveying line can realize the completion of multiple processes, no additional manpower is needed for connection, and the automation degree of the conveying line is improved.

This utility model discloses a safety protection device for a rail-mounted crane, relating to the field of lifting equipment. An installation plate is provided between the electric hoist and the traveling vehicle body. The installation plate has an elastic pawl structure, which is connected to the drive shaft of the electric hoist. An anti-fall structure is provided between the hook and the wire rope, including a safety seat, a baffle, a slider, and a gravity drive assembly. The safety seat has a receiving groove. The slider is slidably disposed in the receiving groove and elastically connected to its bottom. The hook is connected to the bottom of the slider. The gravity drive assembly is rotatably disposed in the receiving groove and is connected to the slider. One end of the baffle is connected to the gravity drive assembly, and the other end has a limiting part, which engages with a limiting groove at the end of the hook. This application can lock the electric hoist during power outages, preventing the drive shaft from reversing and causing the load to fall; and it can improve the safety protection performance of the hook.

The utility model discloses a combined circuit board, include: circuit female board and circuit daughter board, the outer edge of circuit female board is provided with the socket, one end of circuit daughter board is provided with the plug, the utility model discloses through the butt joint of plug and socket, realizes the connection of circuit female board and circuit daughter board circuit, then is provided with the tensioning assembly between plug and socket, makes plug and socket close adhesion, prevents the separation of plug and socket, leads to the circuit virtual connection of plug and socket inside, is provided with locking assembly on plug and socket simultaneously, is used for with circuit female board and circuit daughter board and carries out stable connection, prevents the shake between circuit daughter board and circuit female board, leads to the shake of plug and socket and circuit female board and circuit daughter board junction, causes the short circuit of circuit, thereby avoids the problem that traditional combined circuit board circuit is easy to short circuit.

The utility model relates to a metallurgical container tilting assembly with good stability belongs to the field of pouring discharge device. Including outer support structure, tilting drive structure and trunnion linkage assembly, outer support structure is frame type support structure for supporting the slag ladle, the outer support structure has the support part for supporting the slag ladle trunnion, trunnion linkage assembly sets up on the support part, the trunnion linkage assembly can be driven when the slag ladle trunnion rotates, the trunnion linkage assembly includes ratchet wheel and pawl, the ratchet wheel is followed with the slag ladle trunnion, the pawl stops ratchet wheel and prevents reverse rotation, the tilting drive structure is used for driving the slag ladle rotation around its trunnion. The ratchet wheel and pawl structure in the trunnion linkage assembly of the application prevent the slag ladle from reversing during tilting, improving the safety of operation. At the same time, the whole protection structure is simple, and it is unnecessary for human to approach operation.

The application discloses a motorcycle, comprising: a walking system; an engine, comprising a driving mechanism, a gear shifting mechanism and a reverse gear mechanism; the driving mechanism comprises a starting device, the reverse gear mechanism comprises a driving assembly, an adjusting assembly and a transmission assembly, the starting device and the transmission assembly are kept in driving connection, the driving assembly controls the driving connection or separation between the transmission assembly and the gear shifting mechanism through the adjusting assembly; the transmission assembly comprises a transmission bearing, the transmission bearing comprises a first working state and a second working state; when the transmission bearing is in the first working state, if the transmission assembly and the gear shifting mechanism are in driving connection, the starting device transmits driving force to the gear shifting mechanism through the transmission assembly; when the transmission bearing is in the second working state, if the transmission assembly and the gear shifting mechanism are in driving connection, the power of the gear shifting mechanism cannot be reversely transmitted to the starting device through the transmission assembly. Through the above setting, the auxiliary reverse function of the motorcycle can be realized, and the reverse rotation of the starting device can be prevented.

This invention relates to the field of integrated structural and functional design of aero-engines, and discloses a compressor rectifier blade angle adjustment structure and method based on piezoelectric materials. The method utilizes the extension, contraction, or bending deformation of a first and second active pawl to drive the rectifier blade, equipped with ratchet wheels, to rotate to the desired angle. Furthermore, each rectifier blade is designed with two ratchet wheels, which work together to allow the blade to freely rotate in both directions. The first and second anti-return pawls effectively prevent reverse rotation and backtracking during rectifier blade angle adjustment. This invention transforms the reciprocating motion of the first and second active pawls into intermittent rotation of the rectifier blade along a certain direction, moving step by step and accumulating the rotation angle. This allows the rectifier blade angle adjustment range to reach 360°, and the adjustment accuracy can be adjusted by modifying the number of ratchet teeth as needed. This adjustment structure is superior to traditional adjustment structures, and the adjustment method has the advantage of high positioning accuracy.

This utility model provides a flywheel energy storage experimental device. The flywheel energy storage experimental device includes: a main body, which includes an anti-reverse component, a shock-absorbing component, a protective component, and a base plate. The anti-reverse component includes a device support frame fixedly mounted on the main body. A fixing block is provided on the device support frame, and a fixing ring is provided on the fixing block. An inner ring is provided inside the fixing block, and a rotating bearing is provided between the inner ring and the fixing ring. A vertical groove is formed on the fixing ring, and a limiting slider is provided inside the vertical groove. A protrusion is provided on the limiting slider, and a first elastic element for limiting the slider's reset is provided inside the vertical groove. A protrusion is installed on the inner ring, and a rotating rod is provided on the inner ring. The flywheel energy storage experimental device provided by this utility model has the effect of extending the service life of the device.

This utility model belongs to the field of elevator installation technology, specifically relating to a traction device for elevator installation. It includes a base, a rotating motor, a rotating rod, a winding sheave, and a vertical plate. The rotating motor is fixedly connected to the top of the base, the rotating rod is fixedly connected to the output end of one side of the rotating motor, the winding sheave is fixedly sleeved on the surface of the rotating rod, and the vertical plate is movably sleeved on the surface of the rotating rod and fixedly connected to the top of the base. A positioning mechanism is provided on the outer side of the vertical plate. The positioning mechanism includes a circular groove, a compression spring, a rotating gear disc, and a mating gear disc. The circular groove is located on the outer side of the vertical plate, one end of the compression spring is fixedly connected to the inner wall of the circular groove, and the compression spring is movably sleeved on the surface of the rotating rod. This utility model provides a traction device for elevator installation that can assist in limiting the traction sheave, preventing slippage and reverse rotation, thereby improving the safety of the traction device.

The utility model provides a kind of river embankment maintenance engineering protection structure, it is related to hydraulic engineering protection technical field, including the split type protection module for river embankment protection, the rear side of the split type protection module is detachably connected with the rotating anchoring structure for anchoring, the surface of the rotating anchoring structure is provided with the anti-stab structure for preventing rotation, the quantity of the anti-stab structure is several, and evenly distributed.The utility model sets up split type protection module, rotating anchoring structure and anti-stab knot, solve the existing river embankment protection and adopt concrete slope protection or riprapping structure, there is the problem of poor ecology, gap is easily hollowed out by water flow, traditional gabion stone cage net structure can plant grass, but the integrity is insufficient, after impact, easily deformed failure problem.

This invention discloses a horizontally mounted piston-airbag type water hammer protection tank for water hammer protection in water supply systems. The tank body has an inner tank, separating an inner cavity from an outer cavity. The inner tank is further divided into left and right inner cavities by left and right partitions, with a piston cylinder and an airbag cylinder respectively installed at each end. The left and right pistons reciprocate within the cylinders in a sealed manner. The matching left and right telescopic airbags, composed of soft bag-like structures and multi-rod telescopic joints, move intermittently within the airbag cylinders, forming completely isolated air pressure and hydraulic chambers, achieving gas-liquid separation and heat insulation. A float assembly is installed at the bottom of the tank, and a circulating water nozzle is located at the top, connected downstream of the water pump check valve. A bottom-side spray nozzle is aligned upstream of the check valve via a first ejector. A water supply branch pipe connects to the main water supply pipe via an inlet ball valve and a second ejector. This device replaces the traditional waterbag structure with a piston-airbag synergy, solving the defects of waterbag rupture and the need for continuous air replenishment in air compressor-type systems, thus improving the reliability and energy efficiency of water hammer protection.

The utility model discloses a textile fabric stretching mechanism which comprises a winding roller and fixing rings, the fixing rings are fixedly connected to the two sides of the winding roller respectively, a movable groove is formed in an inner cavity of each fixing ring, a clamping device is arranged in an inner cavity of each movable groove, and the side, away from the winding roller, of each fixing ring is rotationally connected with a support through a rotating shaft. A limiting device is arranged at the top of the side, close to the support, of the fixing ring, and a limiting groove used in cooperation with the limiting device is formed in the side, close to the fixing ring, of the support. The clamping device, the support and the limiting device are used in cooperation, the push rod is pushed, the push rod pushes the fixing block to move, the fixing block stretches the tension spring, meanwhile, the fixing block drives the clamping block to move through the connecting block, fabric is placed on the surface of the winding roller, the push rod is loosened, and the fixing block is driven by contraction force generated after the tension spring is stretched to move reversely; the problems that when an existing textile fabric is processed, wrinkles are likely to be generated on the fabric, and consequently defective products appear in the subsequent processing process are solved.

This invention discloses a wire harness terminal crimping device for a photovoltaic connector, including a handle. A fixed frame is fixedly connected to one side of the handle, and a driving component is provided on the other side. Through the mutual cooperation of the handle, fixed frame, fixed clamping plate, movable clamping plate, protective shell, cover, hydraulic cylinder, mounting block, slot, connecting frame, top frame, threaded rod, track, side block, slider, and moving port, this invention allows for stepless adjustment of the vertical distance between the fixed and movable clamping plates during use. The adjustment range is from the farthest to the nearest, eliminating the problem of pre-set adjustment spans for different slots found in existing technologies. This provides a wider range of adaptability and better meets practical usage needs. The adjustment process is also convenient and quick. Although one movable clamping plate is fixed and the other is movable, their vertical movement can be completed by the operator using a single threaded rod, reducing the workload of the operator.