45results about How to "Realize double protection" patented technology

The invention relates to a U-shaped lock with double lock cylinders. The U-shaped lock with double lock cylinders comprises a lock body and a U-shaped locking beam rotatably arranged on the lock body, wherein two lock cylinder grooves arranged in sequence are formed in the lock body, the ends of the lock cylinder grooves are connected with lock bolt grooves vertically communicated with the lock cylinder grooves, a first lock cylinder and the second lock cylinder are arranged in the lock cylinder grooves, a first locking column arranged eccentrically is arranged at the end of the first lock cylinder, a second locking column arranged eccentrically is arranged at the end of the second lock cylinder, and lock bolts are arranged in the lock bolt grooves. The second locking column is matched with the lock bolt for linkage, the second lock cylinder drives the second locking column to be linkage with the lock bolt so as to open or close the U-shaped locking beam. The first locking column is located at one end of the corresponding lock bolt, and the first lock cylinder rotates to drive the first locking column to movably locked or release the moving space for the corresponding locking bolt. The dual protection on the lock cylinder and lock bolt portions of the U-shaped lock, the lock cylinder damage or unlocking difficulty of a burglar are increased, and accordingly the anti-theft effect of the U-shaped lock is improved.

The invention discloses an aluminum steel window anti-collision treatment device and a using method thereof, and belongs to the technical field of aluminum steel window anti-collision. The aluminum steel window anti-collision treatment device comprises a pair of L-shaped protective frames clamped to the outer end of an aluminum steel window frame, wherein the L-shaped protective frames comprise U-shaped clamping plates clamped to the outer end of the aluminum steel window frame, the outer ends of the U-shaped clamping plates are fixedly connected with a pair of parallel inner-layer buffer cotton, and outer-layer buffer rubber is arranged at the ends, away from the U-shaped clamping plates, of the inner-layer buffer cotton. According to the aluminum steel window anti-collision treatment device and the using method thereof, the L-shaped protective frames are arranged on the outer side of the aluminum steel window frame, when an external object collides with the L-shaped protective frames, on the one hand, the collision force can be weakened for the first time from the front side through elastic deformation, on the other hand, the action direction of the collision force is changed through circulating rolling of balls, secondary weakening of the collision force is achieved, collision damage of the external object to the aluminum steel window frame is greatly reduced through doubleweakening of the L-shaped protective frames to the collision force, and double protection of the aluminum steel window frame is achieved.

An electronic governor (100, 100a), comprising an upper metal casing member (11); a lower metal casing member (12) engaged with the upper metal casing member (11) to form one casing (1); a control circuit board (5) mounted within the casing (1) and provided with electronic components (51) thereon, the electronic components (51) comprising a MOS transistor; and an encapsulating material (41) filled in gaps between the casing (1) and the control circuit board (5), wherein heat generated by the electronic components (51) on the control circuit board (5) is transferred to the casing (1) via the encapsulating material (41). The electronic governor (100, 100a) of the present invention has the casing (1) filled with the encapsulating material (41), thus providing double protection to the control circuit board (5) by means of the encapsulating material (41) and the casing (1).

The invention discloses a surface-hardening treatment method of sealing pairs and friction pairs of titanium and titanium alloy ball valves. The sealing pairs are related sealing parts at all sealing positions in a valve, a ball and a valve base, and the friction pairs are related friction parts at all transmission connection positions in the valve, the ball and the valve base. The surface-hardening treatment method relates to chemical heat treatment and a vapor deposition hard coating. The chemical heat treatment and the vapor deposition hard coating are simultaneously used for the sealing pairs and the friction pairs of titanium and titanium alloy ball valves so that the problem that surface hardness of the titanium and titanium alloy ball valves treated by a single chemical heat treatment process is low. Based on the chemical heat treatment, the vapor deposition hard coating is adopted so that a hardness difference of a chemical heat treatment infiltrated layer is reduced. The vapor deposition hard coating further improves bonding strength of the chemical heat treatment infiltrated layer and improves surface hardness of the titanium and titanium alloy ball valves. Even if the vapor deposition hard coating is damaged in actual use, a hardened layer formed from the chemical heat treatment infiltrated layer still has a protection effect so that dual protection is realized.

The invention discloses a manual anti-falling crank and connecting rod device for a vertical elevator. The manual anti-falling crank and connecting rod device comprises a crank, a connecting rod, a locking sliding block, an operation rod and a set of avoiding holes. The locking sliding block is arranged on an elevator car frame and can horizontally slide. One end of the connecting rod is connected with the locking sliding block through a first connecting shaft, and the connecting rod can swing with the first connecting shaft as the fulcrum. The other end of the connecting rod is connected with one end of the crank through a second connecting shaft, and the connecting rod and the crank can mutually swing with the second connecting shaft as the fulcrum. The other end of the crank is connected with the elevator car frame through a third connecting shaft, and the crank can swing with the third connecting shaft as the fulcrum. One end of the operation rod is connected with the crank through a fourth connecting shaft, and the operation rod and the crank can mutually swing with a connecting point as the fulcrum. The other end of the operation rod is arranged in an elevator car and provided with a clamp hook device. The avoiding holes are formed in the shaft wall and are matched with the locking sliding block in shape. When an existing anti-falling device is in failure, a person in the elevator can manually brake the elevator to achieve the anti-falling purpose, and self rescue of the person in the elevator is achieved.

The invention discloses a vertical elevator with a composite locking pin. The vertical elevator comprises a lift car, a well wall, a lift car frame, a locking device, a control lever and stopping blocks. The locking device is arranged on the lift car frame and can make axial movement. One end of the control lever is arranged on the lift car frame and can be adapted to the locking device in shape, and the other end of the control lever is arranged inside the lift car. Moreover, the control lever can make axial movement. The stopping blocks are arranged on the well wall and can be adapted to the locking device in shape. The locking device comprises a first elastic part and the locking pin. One end of the first elastic part is connected with the locking pin, and the other end of the first elastic part is connected with the lift car frame. The locking pin comprises a high manganese steel wire mesh and a metal layer which are coiled with each other, and is formed in the mode of extrusion casting. The high manganese steel wire mesh comprises a set of high manganese steel wires which are interwoven with one another. When an existing fall-preventing device fails, persons in the elevator can brake the elevator manually, so that the fall-preventing purpose is achieved, and the persons in the elevator can be self-rescued.

The invention provides a two-stage sealing bumping-pressure salvageable well completion device for a horizontal well. The device comprises a drilling-free plug device, a bumping-pressure rubber plug and a salvaging device. The drilling-free plug device comprises a cementing switch and a packer. The upper end of the cementing switch is connected with a sleeve. The lower end of the cementing switch is connected with the upper end of the packer. The lower end of the packer is connected with a sieve tube. The cementing switch is a check valve type cementing switch. A check valve base is arranged at the bottom end of the check valve type cementing switch. The check valve base comprises a check valve and a blind plug. The two-stage sealing bumping-pressure salvageable well completion device is compact in structure, high in pressure bearing capacity, capable of ensuring the balance between the pressure of liquid inside a well completion pipe string and the pressure of liquid outside the well completion pipe string, convenient to operate on site and safe in construction.

The invention relates to a U-shaped lock with double lock cylinders. The U-shaped lock with double lock cylinders comprises a lock body and a U-shaped locking beam rotatably arranged on the lock body, wherein two lock cylinder grooves arranged in sequence are formed in the lock body, the ends of the lock cylinder grooves are connected with lock bolt grooves vertically communicated with the lock cylinder grooves, a first lock cylinder and the second lock cylinder are arranged in the lock cylinder grooves, a first locking column arranged eccentrically is arranged at the end of the first lock cylinder, a second locking column arranged eccentrically is arranged at the end of the second lock cylinder, and lock bolts are arranged in the lock bolt grooves. The second locking column is matched with the lock bolt for linkage, the second lock cylinder drives the second locking column to be linkage with the lock bolt so as to open or close the U-shaped locking beam. The first locking column is located at one end of the corresponding lock bolt, and the first lock cylinder rotates to drive the first locking column to movably locked or release the moving space for the corresponding locking bolt. The dual protection on the lock cylinder and lock bolt portions of the U-shaped lock, the lock cylinder damage or unlocking difficulty of a burglar are increased, and accordingly the anti-theft effect of the U-shaped lock is improved.

The invention discloses a method for protecting a compressor when an air conditioner makes heat in the high temperature environment. The method can prolong the service life of the compressor, prolong the heat-making time of the air conditioner and shortens the interval time of the shutting-down of the air conditioner. When the temperature of a pipe coil of an indoor exchanger of the air conditioner is more than or equal to 52 DEG C, the wind velocity of an indoor blower is high; when the temperature of the pipe coil of the indoor exchanger of the air conditioner is more than or equal to 56 DEG C, a central microprocessor shuts down an outdoor blower of the air conditioner; when the temperature of the pipe coil of the indoor exchanger of the air conditioner is more than or equal to 65 DEG C, the central microprocessor shuts down the compressor of the air conditioner; when the temperature of the pipe coil of the indoor exchanger of the air conditioner is less than or equal to 50 DEG C, the air conditioner reverts to the working state before the moment when the temperature of the pipe coil of the indoor exchanger is more than or equal to 52 DEG C.