34results about How to "Prevent accidental movement" patented technology

The invention relates to a jumping-prevention machine halt method of a double-cylinder pumping system. The double-cylinder pumping system comprises a double-cylinder pumping device and a hydraulic control system of the double-cylinder pumping device, wherein the double-cylinder pumping device is provided with two main oil cylinders (4, 5). The machine halt method comprises the following steps that firstly, the double-cylinder pumping device is controlled to stop the pumping operation; and secondly, at least one chamber of a rod cavity and a rodless cavity of the two main oil cylinders (4, 5) is communicated with an oil tank or an oil return oil path. In addition, the invention also provides the double-cylinder pumping system and pumping equipment. The pressure relief step is inventively added on the basis of the existing double-cylinder pumping system, so each cavity of the main oil cylinder of he double-cylinder pumping system is in low-pressure or pressure-free state, the accidental jumping of a piston rod of the main oil cylinders caused by sealed high-pressure oil is effectively prevented, and the safety of maintainers in the overhauling and maintenance work process of the double-cylinder pumping system is relatively and effectively ensured.

The invention relates to a desk with four legs ascending and descending synchronously. As an improvement, the two front desk legs and the two rear desk legs are fixedly connected into a whole through a lower connecting plate and an upper connecting plate, each front desk leg is provided with a left threaded hole which is through vertically, and each rear desk leg is provided with a right threaded hole which is through vertically; the upper end of each front vertical shaft is provided with a front plummer block section which is in interference fit with a vertical bevel gear, and each vertical bevel gear is meshed with a transverse bevel gear with the 90-degree included angle, and according to the lower half section of each front vertical shaft, left external threads are meshed with the corresponding left threaded hole; the upper end of each rear vertical shaft is provided with a rear plummer block section which is in interference fit with a vertical bevel gear, and each vertical bevel gear is meshed with a transverse bevel gear with the 90-degree included angle, and according to the lower half section of each rear vertical shaft, left external threads are meshed with the corresponding left threaded hole; the lower end of each front desk leg is provided with a front rubber pad, and each front rubber pad is provided with a left inlaid screw in fastening fit with the corresponding left threaded hole in a rotating mode; the lower end of each rear desk leg is provided with a rear rubber pad, and each rear rubber pad is provided with a right inlaid screw in fastening fit with the corresponding right threaded hole in a rotating mode.

The invention discloses a program lock device of a three-station electric mechanism and an application method of the program lock device. The device comprises a working position locking and unlockingdevice and an automatic reset device, wherein the working position locking and unlocking device comprises a half shaft, a position control driven cam, a position control driving cam and a power cam, the control driving cam is hinged with an intermittent movement mechanism, the intermittent movement mechanism is formed by matching of a movement top plate and the control driven cam, a limitation mechanism is formed by matching of the half shaft and the power cam, the automatic reset device comprises a transition flange and a guide support, the transition flange and the guide support are fixedlyarranged at two sides of one wall of a mechanism box, a lock rod of a program lock extends to the guide support by the transition flange, a push rod and a reset spring are arranged in the guide support, the reset spring can be used for allowing the push rod to automatically reset, and the push rod is hinged with the position control driving cam via a connection rod. By the device, a breaking position of the three-station mechanism is locked by the program lock after locking, and accidental action caused by a manual operation fault is prevented from the aspect of operation flow control.

The invention provides a lock plug, a lock and a control method of the lock plug. The lock plug comprises a lock body, a lock cylinder, a locking assembly, a driving assembly, and a stopping part, wherein the locking assembly is movably arranged between the lock cylinder and the lock body, and can switches between a mechanical locking position and a mechanical unlocking position; the driving assembly is connected with the lock body, at least one part of the driving assembly can move relative to the lock body, and the driving assembly can match with a unlocking key and can switch between a driving locking position and a driving unlocking position; the stopping part is movably arranged in the lock cylinder, and can switch between a stopping position and an avoiding position; and when the unlocking key does not unlock the lock plug, the stopping part is located at the stopping position, at least one part of the stopping part extends into the lock body to prevent the relative rotation between the lock cylinder and the lock body, and the stopping part stops a locking end so as to lock the driving assembly in the driving unlocking position. According to the lock plug, the problem that inthe prior art, the lock plug is easily locked or unlocked in an accident condition is solved.

An optical apparatus which has a lens movable forward or backward in a direction of an optical axis through operation of an operating member, prevents unintended motions in the lens, and improves operating quality of the operating member at low cost. A fixing member rotatably holds the operating member and has a first contact surface coming into contact with a pressing member sandwiched between the operating member and the fixing member. The operating member rotatable about the optical axis moves an image pickup optical system in the direction of the optical axis and has a second contact surface facing the first contact surface and coming into contact with the pressing member. The pressing member applies pressing force as load on the operating member to the operating member. The first or second contact surface has a slope that changes the pressing force according to a rotational angle of the operating member.

An installation arrangement for a solenoid controlled handle operation in a door lock in which force transmission from an operation axis (3) for a handle or the like to a follower (4) acting on a bolt (12) of the lock is arranged by means of a movable coupling member (6,6'), which receives its guidance from a solenoid arrangement. The follower (4) is provided with two separate torsion units (13,14) which are installed on the operation axis (3) on different sides of the follower (4) and are turnably supported to it and which can be selectively coupled by means of said coupling member (6,6') to be in force transmission connection with the follower (4).

The invention discloses a sampling device for detecting the water content of cement clinker, and relates to the technical field of cement clinker sampling processing, the sampling device comprises a sampling outer cylinder and a sampling inner cylinder rotatably arranged in the sampling outer cylinder, and the front surface of the sampling outer cylinder and the front surface of the sampling inner cylinder are each provided with a plurality of feed ports; an auxiliary discharging assembly convenient for discharging is arranged in the sampling inner cylinder in a left-right sliding manner; the auxiliary discharging assembly comprises a piston arranged in the sampling inner cylinder in a sliding mode, a sliding rod detachably arranged on the right side of the piston and a rotating plate arranged at the right end of the sliding rod, the rotating plate is rotationally connected with the end cover, internal threads are formed in the inner wall of the end cover, and external threads are formed in the outer wall of the sampling outer cylinder. According to the cement clinker sampling device, the sliding rod drives the piston to conveniently take out a cement clinker sample in the sampling inner cylinder, and the sliding rod is limited to slide out through the end cover in threaded connection with the sampling outer cylinder, so that the piston is prevented from accidentally moving when not in use, and the cement clinker sampling efficiency is improved.

A loading bottom plate structure (12, 14) for automobile comprises a backseat (20) with a backrest (22) and a cushion (24). In addition, a bottom plate element (16) capable of moving along the running direction of the automobile is provided for receiving an object. The bottom plate element (16) is connected with the backrest (22) and covers the cushion (24) under the withdrawing state of the bottom plate element (16). Thereby, the loading space for transporting the object with large volume can be enlarged if necessary.

The invention discloses a water level monitoring device based on the Internet of things. The device comprises a floating ball and a base. The floating ball is in an ellipsoidal shape; a connecting column is connected to the bottom of the floating ball; worms are installed in the connecting column; the top end of each worm is inserted into the floating ball; and a handle is installed at the top ofeach worm. The two worms are arranged in opposite. Two telescopic slots are formed in the bottom of the connecting column in opposite; the opposite ends of the two telescopic slots penetrate the connecting column; clamping columns are installed in the telescopic slots; and worm wheels are installed at the clamping columns and engaged with the worms. A connecting column mounting slot is formed in the surface of the base; clamping holes are formed in the two sides of the connecting column mounting slot and match the clamping columns; and a sealing strip is installed between the connecting columnmounting slot and the connecting column. Therefore, the monitoring device is convenient to assemble, dismount and repair.