38results about How to "Guarantee the safety of hoisting" patented technology

The present invention discloses a mechanical type automatic catching and laying rail device, consisting of a hook seat, a hanging seat, a guide board, a clamping arm, and a link lever, wherein the hook seat consists of a hanging lug board, an upper gear ring, a lower gear ring, a screw rod, and a T-shaped hook, wherein the clamping arm is connected with the hanging seat by an axle on the hanging seat; one end of the link lever is connected with the hook seat by the axle, while the other end is connected with the clamping arm by the axle; the link lever is connected with the clamping arm to form a four-bar linkage structure; the four link levers are driven to displace by the upward and downward movement of the hook seat so as to open or close the clamping arm and achieve the steel rail catching movement and the steel rail laying movement; the upper gear ring is fixed in the hook seat, while the lower gear ring can be rotated along with the upward movement and the downward movement of the T-shaped hook; the mechanical self-locking and unlocking is realized by the rotation of the lower gear ring and the separation and joggling of the upper gear ring. The device does not need the drive of a power source, and is not restricted by the work environment. Just by the mechanical movement, automatic rail catching and laying can be realized. The device is simple in structure, convenient in operation, practical, reliable, lower in cost, high in economy, and high in practicability.

The invention provides an automatic bag folding and integrated packaging system, and belongs to the technical field of works. The automatic bag folding and integrated packaging system solves the problems that an existing bag folding and integrated packaging machine is low in working efficiency, and many workers are needed. The automatic bag folding and integrated packaging system comprises a rack and a bag folding trolley. The rack is provided with a horizontal roller conveying line, a falling control device with a supporting plate and used for controlling falling of bags and a high-speed conveying line connected with the roller conveying line in series and capable of conveying the bags to fall on the supporting plate. The bag folding trolley is located below the falling control device. According to the automatic bag folding and integrated packaging system, the roller conveying line can adjust the postures and intervals of the bags automatically, and workers in the corresponding processes are saved; the high-speed conveying line guarantees that the bags totally fall on the supporting plate, and the postures of the bags falling on the supporting plate are the same, and thus the corresponding adjusting personnel is saved; at the bag folding trolley, only one lifting worker is needed to arrange a hook ring for lifting the bags in a lifting hook of a lifting device in a sleeving mode, and the automatic bag folding and integrated packaging system has the advantage that the workers required by operation are less.

The invention belongs to the field of hoisting operation safety control, and discloses a door crane brake swing early warning system and method for segment hoisting of a subway shield tunnel, wherein the early warning system includes a hoisting data acquisition module, a data analysis and prediction module, and a segment swing early warning module The hoisting data acquisition module is used to collect the spatial information of the subway segment in the hoisting process in the downhole in real time; the data analysis and prediction module reasonably predicts the future hoisting trajectory of the subway segment through the above-mentioned collected data; the segment swing early warning module is based on The hoisting prediction trajectory calculates and judges the possible swing size of the subway segment and outputs the corresponding early warning signal. The invention predicts the hoisting trajectory based on the composite model of data drive and motion analysis, and uses reasonable and accurate predicted trajectory to carry out pre-warning control on the unsafe swing of the subway segment during the deceleration and braking phase of hoisting, and optimizes the safety control of the hoisting process of the subway segment , Actively avoid subway segment hoisting accidents.

The present invention discloses a mechanical type automatic catching and laying rail device, consisting of a hook seat, a hanging seat, a guide board, a clamping arm, and a link lever, wherein the hook seat consists of a hanging lug board, an upper gear ring, a lower gear ring, a screw rod, and a T-shaped hook, wherein the clamping arm is connected with the hanging seat by an axle on the hanging seat; one end of the link lever is connected with the hook seat by the axle, while the other end is connected with the clamping arm by the axle; the link lever is connected with the clamping arm to form a four-bar linkage structure; the four link levers are driven to displace by the upward and downward movement of the hook seat so as to open or close the clamping arm and achieve the steel rail catching movement and the steel rail laying movement; the upper gear ring is fixed in the hook seat, while the lower gear ring can be rotated along with the upward movement and the downward movement of the T-shaped hook; the mechanical self-locking and unlocking is realized by the rotation of the lower gear ring and the separation and joggling of the upper gear ring. The device does not need the driveof a power source, and is not restricted by the work environment. Just by the mechanical movement, automatic rail catching and laying can be realized. The device is simple in structure, convenient inoperation, practical, reliable, lower in cost, high in economy, and high in practicability.

The invention discloses a segmental hoisting construction method for a steel grid structure. The steel grid structure to be hoisted includes a lower grid frame and an upper grid frame, both of which are assembled by four string balls and string rods. The lower network frame and the upper network frame are connected through web bars, and the method includes the following steps: 1. Construction preparation; 2. Segmentation of the steel grid structure; 3. Assembly of steel grid segments; Temporary support for segmental hoisting; 5. Segmental hoisting of steel grid structure. The construction operation of the present invention is convenient. By dividing the steel grid structure into multiple steel grid segments, assembling the steel grid segments on the ground, and hoisting the assembled steel grid segments one by one, it can effectively Improve the assembly quality and assembly efficiency of the steel grid sections; temporary supports are used for temporary support during the hoisting of the steel grid sections, which can effectively ensure the installation accuracy of the steel grid sections and reduce the height of the steel grid structure during hoisting The working time is small and the safety risk is small.

The invention discloses a unilateral glass rib-reinforcement cage structure for a shield tunnel portal diaphragm wall. The structure comprises an underground diaphragm wall reinforcement cage, a tunnel portal steel ring is tightly attached to and connected to the soil backing side face of the underground diaphragm wall reinforcement cage, an annular reinforcement truss which is concentric with thetunnel portal steel ring is connected between a soil facing side face and a soil backing side face of the underground diaphragm wall reinforcement cage, the annular reinforcement truss is located onthe periphery of the tunnel portal steel ring, the parts, located on the inner periphery of the tunnel portal steel ring, of soil facing side vertical reinforcements striding over the tunnel portal steel ring are replaced by vertical glass fiber bars, and the parts, located on the inner periphery of the tunnel portal steel ring, of soil facing side horizontal reinforcements striding over the tunnel portal steel ring are replaced by horizontal glass fiber bars. The tunnel portal steel ring is used for receiving and pre-burying a shield tunneling machine when serving as a main body structure, and the arranged annular reinforcement truss is used for ensuring that the glass fiber bars are not influenced by gravity to be infinitely broken when the reinforcement cage is lifted, so that the lifting safety of the reinforcement cage can be ensured, and the stress requirement of a wall body can be met.