466 results about "Lifting capacity" patented technology

A system, method and apparatus for providing additional radiation shielding to a container holding radioactive materials. The invention utilizes a sleeve-like structure that is slid over a container holding high level radioactive materials to add radiation shielding protection. Because the sleeve-like structure and container are non-unitary and slidably separable from one another, crane lifting capacity is not affected. In one aspect, the invention is an apparatus comprising: a tubular shell constructed of a gamma radiation absorbing material and having an inner surface that forms a cavity having an axis, the cavity having an open top end and an open bottom end; a plurality of spacers extending from the inner surface of the shell toward the axis of the cavity, the spacers extending a first height from the inner surface of the tubular shell; and one or more flange members located at or near the open top end of the cavity extending from the tubular shell toward the axis of the cavity, the flange member extending a second height from the inner surface of the shell, the second height being greater than the first height.

The invention relates to a foldable radar antenna lifting mechanism based on space link multi-oil-cylinder coordinated drive. The foldable radar antenna lifting mechanism based on space link multi-oil-cylinder coordinated drive comprises a first-stage parallel mechanism, an auxiliary turnover mechanism, a second-stage parallel mechanism, a supporting platform mechanism, a first rotary encoder, a second rotary encoder and a horizontal sensor, wherein the first-stage parallel mechanism is installed on the auxiliary turnover mechanism, the upper portion of the second-stage parallel mechanism is installed on the auxiliary turnover mechanism, the bottom portion of the second-stage parallel mechanism is installed on the supporting platform mechanism, the first rotary encoder, and the horizontal sensor are installed on the first-stage parallel mechanism, and the second rotary encoder is installed on the second-stage parallel mechanism. The foldable radar antenna lifting mechanism based on space link multi-oil-cylinder coordinated drive has the advantages that the control accuracy and the safety are high, the rigidity is high, the stability during lifting is better, the lifting capacity is great, the spreading and folding speed is fast, the space occupied by the mechanism after being folded is small, multiple transportation manners are compatible, and the contradictions between the lifting height and the lifting capacity and between the lifting height and the mobility are effectively solved.

The present invention discloses apparatus and methods for a lightweight subsea intervention package that may be installed using vessels with a smaller lifting capacity than semi-submersible platforms so that the subsea intervention package can be transported, installed, and removed from a subsea well in less time and with less cost. In one embodiment, the present invention comprises a lower riser package for controlling the subsea well which utilizes two hydraulically activated gate valves. An emergency disconnect package is secured to the lower riser package utilizing a disconnect mechanism. The emergency disconnect package is operable to seal the bottom of a riser if the disconnect mechanism is activated to thereby minimize environmental leakage of fluid from the riser.

The invention provides a dispersed dark dye composition, which mainly comprises 5-95 parts by mass of one or more dye components A shown in formula (I) and 5-95 parts by mass of one or more dye components B shown in formula (2). When applied to a hydrophobic textile material, in particular to polyester material embossing or coloration, the dispersed dark dye composition provided by the invention has the characteristics of good dyeing depth, excellent lifting capacity, good color fastness and the like, therefore, the dye consumption during coloring is small, and the use cost of the dye is favorably saved.

The invention discloses a method for improving precision of stepped components in a laser spot-changing direct formation mode. The method includes the steps that a cladding test is performed firstly, the sectional width and height data of a single-track cladding layer under different technological parameters are obtained, orders of a sectional curve of the cladding layer under different aspect ratios are fitted out, and the function relationship between the orders of the sectional curve of the cladding layer under the different aspect ratios and the height and lifting capacity of the single-track cladding layer is built; then single step-shaped tracks corresponding to the same lifting capacity are built, the technological parameters of the laser spot-changing cladding single tracks are determined according to the single step-shaped tracks, and a highly-smooth cladding layer is formed in a cladding mode through laser spot-changing direct formation; after one cladding layer is completed, a spray nozzle is lifted by a layering height, new fusion tracks are formed in a cladding mode through the single step-shaped tracks, and operations circulate until manufacturing of a three-dimensional part is completed. By means of the method, the highly-smooth cladding layer is obtained, the phenomenon that the top of the cladding layer is not even and portions of small aspect ratios are prone to tension fracture is avoided, and the method improves formation precision and guarantees formation quality.

The invention relates to a variable-speed winch and a foldable type onboard crane comprising the same, relating to the field of winches. The variable-speed winch comprises a variable-speed mechanism, a driving shaft and a driven shaft, wherein the driven shaft is arranged on a stand of the variable-speed winch through a bearing and at the outer side of the driving shaft and is provided with a power output mechanism; the power output end of the driving shaft is provided with a gear locating slot, and the corresponding driven shaft is provided with a locating pin; the locating pin is arranged on the end part of the driving shaft or in the gear locating slot; the variable-speed mechanism comprises a center wheel and a planet wheel; the part of the driving shaft, which is close to the planet wheel, is provided with a radially outwards raised outer spline, and the inner surface of the corresponding variable-speed mechanism is provided with an inner spline; the inner wall of the driven shaft is provided with an inner spline in clearance fit with the outer spline of the driving shaft; and the outer spline of the driving shaft is respectively meshed with the inner spline of the variable-speed mechanism and the inner spline of the driven shaft to form multi-gear variable-speed transmission. The variable-speed winch can realize variable speed of at least two gears and has the advantages of simple structure, convenience for operation, good speed varying effect, small mass and high transmission ratio; and in addition, the foldable type onboard crane with the variable-speed winch has small size and high lifting capacity.

The invention discloses a sewage pump station water level prediction method base on neural network. The method comprises the steps of: firstly selecting prediction model variables including input variables and output variables, wherein input variables include an upstream pump station lifting capacity, forebay liquid level variable quantity, pump station discharge rate and switch pump liquid level control setting quantity and the output variables include a pump station forebay water level; secondly normalizing the data; then setting up a BP neural network framework and training the BP neural network; and finally carrying out denormalization on the data of the neural network. The method has higher prediction accuracy compared with the traditional steady flow computing method.

The invention discloses a split type hoisting method for a 5MW land type wind generating set. According to the method, a cabin is hoisted in a split mode, and split into a cabin body, a generator, a maintenance crane and a top housing according to the weight and the boundary dimension of all parts of the cabin and the hoisting capacity of a main hoisting machine; after the cabin is split, software is utilized for analyzing and recalculating the gravity center position to adjust the design of a hoisting sling, and therefore the level and the safety of cabin hoisting are ensured. The main hoisting machine is utilized for sequentially installing the cabin body and the generator in place and sequentially installing the maintenance crane and the top housing in place. According to a general scheme, a 1600t crawler crane is needed when a whole hoisting scheme is adopted for a 5MW fan, while by means of the implementation of the method, the construction requirement can be met by adopting a 1000t crawler crane, and therefore the construction cost is effectively saved.

The present invention is current pulse controlling method and device with rise edge raising capacity and fall edge linearity regulating capacity and current pulse generating method and device, and is especially suitable for the condition with great inductance load in geophysical exploration, engineering geological exploration and other fields. The method of the present invention includes: regulating frequency, regulating the voltage of DC power supply and clamping voltage source to generate voltage waveform with the same shape and amplitude, calculating the fall slope of the positive and negative current pulses and the fall delay time of the output current pulse. The device of the present invention includes DC power source, power switch, bipolar current pulse generator and its control circuit, inductive load, rise edge raising circuit, clamping circuit and clamping voltage source.

The invention discloses a load distribution optimization method of double-crane collaborative operation, which comprises the steps that three-dimensional scene modeling is performed; crane model selection is performed; crane configuration is performed; double-crane collaborative lifting movement is calculated; double-crane collaborative lifting parameters are calculated; load distribution is optimized; a lifting target point is reached; and lifting is completed. According to the method, a relation model of rated load lifting capacity is established by analyzing influencing factors influencing the rated load lifting capacity, a real-time load model of each crane in a collaborative operation process is studied by analyzing the collaborative operation process and combining the dynamic characteristics of the cranes, and the load distribution is optimized simultaneously, so that the safety of a lifting process is improved.

The invention discloses a hinge points-variable combined type multi-functional crawler crane, belonging to the field of engineering machinery. The crawler crane comprises a multi-hinge point connecting unit 1, a walking rotation unit 2 and a work unit 3. The work unit 3 is connected with the multi-hinge point connecting unit 1 by one hinge pin, and the hinging relative position is confirmed when a working condition is selected, so that the multifunction of the crawler crane can be realized; and the walking rotation unit 2 is connected with the multi-hinge point connecting unit 1 by another hinge pin, and the hinging relative position is switched according to actual requirements in the process of working, so that the work capability of the crawler crane can be improved. The hinge points-variable combined type multi-functional crawler crane has an assistant crane function, so that the problem that a machine body, a ground surface under a crawler plate or a support box are seriously worn when the crawler crane rotates in situ can be perfectly solved, and the hoisting work on a slope or the climbing by means of suspended load can be realized. Compared with the work condition of a tower arm in the current market machine, the work condition of a reverse V-shaped overlapped tower is higher in hoisting capacity; and compared with the work efficiency of the work condition of the current market machine, the work efficiency of the double-hammer dynamic compaction work condition can be doubled.

The invention discloses an analysis and computation method for the structural strength of an elevating drilling platform, comprising the following steps: building a finite element model according to the structure point of a drilling platform; determining an environment condition according to the operational sea area of the drilling platform; determining a variable load; combining different environmental working conditions with the variable load to obtain different computation working conditions; analyzing and calculating each computation work condition; after each computation working condition is calculated, checking the computation result from seven aspects according to relevant standards; drawing the environmental map of the drilling platform by taking the environment condition and the maximum lifting capacity as parameters; and inquiring the map to obtain the true state of the drilling platform under the practical use condition. The method has the outstanding characteristics of more computation working conditions, more manpower and time are consumed if people manually operate to finish the computation, but the dedicated program software which is compiled by the method and is dedicated for the environmental map can finish all computations within short time. Meanwhile, the software supports parallel computation so as to further shorten computation time.

The invention discloses a torque limiting system of a folding-arm type lorry-mounted crane. The torque limiting system comprises a sensor part, a processor part and a performer part, wherein the sensor part consists of a weight sensor, a length measuring sensor and two angle sensors, the processor part calculates the rated lifting capacity under the current working condition according to sensor signals and compares the rated lifting capacity with an actually-measured lifting capacity, and the performer part sends out alarm signals or limits dangerous operations when alarming or limiting conditions are reached. The torque limiting system of the folding-arm type lorry-mounted crane has the advantages that the inconvenience in the input of a rated working curve and incompleteness of curve expression are avoided; the torque limitation under any working condition of lifting from the tail end of a lifting arm can be performed, and the functions are comprehensive; and as the weight sensor is adopted to directly measure weight, the calculation error caused by factors such as zero drift and delay when a pressure sensor is adopted is avoided, and the accuracy is high.

The present invention discloses apparatus and methods for a lightweight subsea intervention package that may be installed using vessels with a smaller lifting capacity than semi-submersible platforms so that the subsea intervention package can be transported, installed, and removed from a subsea well in less time and with less cost. In one embodiment, the present invention comprises a lower riser package for controlling the subsea well which utilizes two hydraulically activated gate valves. An emergency disconnect package is secured to the lower riser package utilizing a disconnect mechanism. The emergency disconnect package is operable to seal the bottom of a riser if the disconnect mechanism is activated to thereby minimize environmental leakage of fluid from the riser.

A mobile crane includes an under carriage, a superstructure that is rotatably mounted on the superstructure, and a main boom, which is composed of a base body and several telescopic lengths up to a predetermined maximum number, which slide into one another and can be extended from the base body. The main boom is mounted on the superstructure so that it can rotate about a horizontal axis and its inclination can be adjusted by means of a hydraulic tilting cylinder that is hinged on the superstructure and the base body. A maximum permissible weight is predefined for the main boom, as a result of a restriction on the permissible axle load of the mobile crane during road haulage. The crane is also provided with a lifting capacity increasing device, which significantly increases the lifting capacity of the main boom when the telescopic lengths are extended, in relation to the state without the lifting capacity increasing device. The lifting capacity increasing device, as part of the standard basic equipment of the mobile crane, is connected in a fixed manner to the main boom, while maintaining the maximum number of telescopic lengths that are carried.