49results about How to "Reduced operational safety" patented technology

An operating rod special for anti-bird instrument live-line installation comprises a sleeving rod, a rotation rod and a fixed part. The sleeving rod is provided with an axial cavity. The rotation rod is coaxially assembled in the axial inner cavity and is capable of moving up and down relative to the sleeving rod. The upper end surface of the rotation rod is provided with a counter bore. The lower part of an inner cavity of the counter bore is six-row-shaped. The fixed part comprises a sleeving ring and a clamping part. The sleeving ring is provided with an inner thread and is connected with the outer wall of the upper end of the sleeving rod. The clamping part of the fixed part is provided with a U-shaped bayonet, a base plate of the U-shaped bayonet is arranged at the left side of the outer wall of the sleeving rod, and the right end of a top plate of the U-shaped bayonet extends to the part above the upper end surface of the sleeving rod. The operating rod is capable of realizing anti-bird instrument live-line installation and fundamentally solving the problem that a plurality of power failures of a power line are caused due to power-off installation of an anti-bird instrument, so that the frequency and time of power failures of the power distribution line are reduced, the continuous stability of power supplying is improved, the service level of power supplying is improved, the labor intensity of operators is reduced, and the operation safety is ensured.

The invention provides a bird repelling device structure and a special mounting rod thereof. Tapered holes are formed in the left and right sides of a fastening bolt on a lower arm of a U-shaped base respectively and large-opening ends of the tapered holes are formed downwards; the conicity of the tapered holes is the same as that of a tapered column and the axial length is relatively small; a blind threaded hole matched with the fastening bolt is formed in the lower end face of a pressing plate; the tapered column penetrates into the tapered holes to be connected with the pressing plate through a screw; the rigidity of the U-shaped base is greater than that of the tapered column. The structure is fixed on a cross arm through the extruding effect of an upper arm of the U-shaped base and the pressing plate. The left and right ends of the pressing plate are matched with the U-shaped base through the tapered column penetrating through the tapered holes of the U-shaped base and the middle part of the pressing plate is matched with the fastening bolt; when the pressing plate is subjected to an upward acting force of the fastening bolt, the pressing plate moves upwards to drive the tapered column to move upwards, and the extrusion is formed among the tapered column and the tapered holes in the U-shaped base, so that a matching relation with a relatively great magnitude of interference is generated among the tapered column and the tapered holes; the stability after the pressing plate is positioned can be ensured and the electrified work mounting of a bird repelling device is realized by the special mounting rod.

The invention discloses a centralized monitoring transformer substation risk identification early warning system and a working method thereof, and relates to the field of electric power operation andmaintenance. A traditional monitoring means is difficult to realize effective management and control on three monitoring risks of equipment defects, frequent light words and suppression signals. The centralized monitoring transformer substation risk identification early warning system synchronously collects data of a master station and a station server, performs statistical analysis, calculation,verification and special analysis on the data including equipment defects, frequent light words and suppression signals, and generates an intelligent risk identification result and a corresponding risk list based on a centralized monitoring risk library; corresponding on-site operation and maintenance units and automatic operation and maintenance personnel are informed and disposed according to safety risk levels, and timely management and control of the equipment defects, constant light words and suppression signals are realized. According to the technical scheme, the risk online management and control rate is improved, the risk management and control time limit is shortened, and the power grid monitoring risk management and control level is improved.

The invention relates to esterifying reaction catalyst used animal and vegetable grease to manufacture biological diesel oil. It belongs to using anima and vegetable grease to manufacture biological diesel oil technique field. The catalyst includes A, B, and C three components; the A can be one or many of cadmium sulfate, zinc sulphate, or aluminium sulphate; the B is sulfuric acid quadric-ammino combine copper; the C is chromic oxide and aluminium sulfide. The invention also offers the manufacturing method. The esterifying reaction catalyst can effectively control the reaction direction to make the reversible reaction toward producing fatty acid methyl ester to make fatty glyceride esterifying ratio reach above 90%. Compared with the catalyst and application method, the invention can reduce catalyst reaction temperature, shorten catalyst reaction time, reduce end product processing program, and effectively increase biological diesel oil production quality, and reduce the fabrication cost.

The embodiment of the invention provides a method and a device for determining running parameters of a waxy crude oil pipeline. The method comprises the following steps of presetting the standard failure probability of a pipeline between heating stations, wherein the pipe condensing accident occurrence probability of the pipeline between the heating stations during running is less than a first preset value through the standard failure probability, and the power of a heating furnace in each heating station is less than a second preset value; determining the initial value of the running parameter and the initial value of the environment parameter of the pipeline between the heating stations; according to the determined initial value of the running parameter and the initial value of the environment parameter, calculating the initial failure probability of the pipeline between the heating stations; according to the size relationship between the standard failure probability and the initial failure probability of the pipeline between the heating stations, adjusting the value of the running parameter of the pipeline between the heating stations, wherein the absolute value of the difference between the standard failure probability and the failure probability which is calculated according to the adjusted value of the running parameter and the initial value of the environment parameter is less than a third preset value. By adopting the method and the device disclosed by the embodiment of the invention, the running safety and economy of the whole pipeline can be balanced.

The invention relates to an urban underground comprehensive pipe gallery risk management and control system based on a neural network, and the system comprises an AI-based artificial intelligence server platform, a remote control terminal, an on-site detection node terminal, an on-site mobile device, and an internet-of-thing communication service network. The AI-based artificial intelligence server platform is in data connection with the remote control terminal, the on-site detection node terminal and the on-site mobile device through the internet-of-thing communication service network. The method specifically comprises the five steps: detection point determination, system networking, system presetting, pipe gallery maintenance and operation and system expansion and optimization. On one hand, the pipe gallery system and the surrounding environment can be effectively and comprehensively monitored, and data acquisition is comprehensive and high in precision; and on the other hand, the system is high in operation automation degree and intelligent degree, the risk event judgment efficiency and precision are greatly improved, and accurate information guidance and service can be providedfor daily management, emergency processing and future information tracing of risk events.

Disclosed are a wedge-key-shaped liner plate structure overflow ball mill and a liner plate mounting method thereof. The ball mill comprises an end cover (2) with end cover liner plates (5) at the two ends, a ball mill tube (1), a rubber pad layer (3) in the tube, and tube body liner plates (4), wherein each tube body liner plate is a wedge-key-shaped liner plate of which the two ends are bevel notch surfaces and the inner surface is the protruding arc surface; every two adjacent tube body liner plates are compressed through reverse wedge-key-shaped pressing strips (6) which are pressed into bevel notches; connecting bolts (7) penetrate through a tube body and fixedly connect the wedge-key-shaped pressing strips with the tube body, so that the tube body liner plates are firmly mounted; the bevel notch surfaces, at the two ends, of the tube body liner plates are wedged and clamped together with the end inclined surfaces of the end cover liner plates; the tube body liner plates and the end cover liner plates are formed through one-time casting of a high manganese chromium alloy which contains 10-20% of manganese and 1-5% of chromium. The wedge-key-shaped liner plate structure overflow ball mill is resistant to abrasion, durable, easy to mount and dismount, good in sealing performance and low in manufacturing cost.

The invention discloses a spray freezing tower system which comprises a spray tower, an atomization air pipe, an air curtain air pipe, an air blowing pipe, a material turnover box and a temperature control system, and the spray tower is provided with a freezing cavity. The spray tower comprises a heat exchange tube layer surrounding the freezing cavity and is used for circulating a heat exchange working medium to enable the freezing cavity to be at the freezing temperature, and atomized materials can be frozen. Materials are not in direct contact with a refrigerating medium and are prevented from being polluted. And a recyclable heat exchange working medium is adopted, so that the operation cost of the spray freezing tower system is greatly reduced. The air curtain can reduce the phenomenon that materials adhere to the wall in the freezing process, and the yield is increased. The whole system can realize automatic control through an integrated control system, has online cleaning and online sterilization functions, and can realize accurate temperature control of -100 DEG C to +100 DEG C. According to the spray cooling tower system, low-temperature freezing of materials can be achieved, high yield can be achieved, large-batch production of frozen and dried materials can be achieved in combination with a fluidized bed system, and the efficiency is far higher than that of a freezedryer.

The invention discloses a positioning device for a high-stability tower crane lifting hook. The positioning device comprises a tower crane body, and a positioning block is arranged outside the upper portion of the tower crane body. The positioning block is connected with one end of a telescopic rod through an upper rotary shaft, and connecting blocks are arranged on the lower surface of the positioning block and the lower surface of a carrying hook. An internal sliding groove is connected with a limiting plate through an internal sliding block, and a servo motor is fixed into the tower crane body. The side face of the tower crane body is rotationally connected with an intermediate rotary shaft, and lateral sliding grooves are symmetrically formed in the two sides in the tower crane body and connected with the positioning block through a lateral sliding block. Positioning grooves are formed in the connecting blocks and an inhaul cable, and a penetrating groove is preserved in a fixed plate. According to the positioning device for the high-stability tower crane lifting hook, the telescopic rod is arranged in a rotating connection manner, and the stability of the position of the carrying hook can be improved; by means of the limiting plate arranged to be of an elastic structure, inertia force generated by cargoes can be buffered, and construction safety is improved.

A pump for conveying a fluid includes a stationary housing, an impeller conveying the fluid from a low pressure region to a high pressure region, a shaft to rotate the impeller about an axial direction, and a separation device to restrict a flow of the fluid from the high pressure region to the low pressure region. The separation device includes a rotary part connected to the shaft, and a stationary part stationary with respect to the housing. The rotary and stationary parts face each other and delimit a gap between the stationary part and the rotary part. The gap is arranged between the high and low pressure regions. A recess is disposed in the stationary part or the rotary part, the recess including a bottom, and a non-metallic insert is disposed in the recess. A relief channel enables fluid communication between the bottom and the low pressure region.

The invention discloses a method and a device for monitoring the closing state of a disconnecting link, equipment and a storage medium. The method for monitoring the state of the disconnecting link comprises the following steps: after a set time when the disconnecting link begins to be electrified, acquiring a sample set of current when the disconnecting link is in a closing in-place state and a temperature rise value of contact temperature corresponding to the current relative to environment temperature; determining a function relationship between the current and the temperature rise value of the disconnecting link based on the sample set; monitoring the actual current after the set time when the disconnecting link begins to be electrified and the actual temperature rise value of the contact temperature corresponding to the actual current relative to the environment temperature; according to the sample set, the function relationship and the actual temperature rise value, determining an error allowable value of the temperature rise value corresponding to the actual current obtained based on the function relationship; and determining the closing state of the disconnecting link according to the relationship between the temperature rise value corresponding to the actual current obtained based on the function relationship, the error allowable value of the temperature rise value and the actual temperature rise value corresponding to the actual current. According to the scheme, the accuracy of monitoring the closing state of the disconnecting link can be improved.

A centrifugal pump for conveying a fluid includes a pump housing, an impeller to convey the fluid from an inlet to an outlet, a shaft to rotate the impeller, a first sealing device to seal the shaft at a suction side, a second sealing device to seal the shaft at a discharge side, a balance drum connected to the shaft between the impeller and the second sealing device, the balance drum defining a front side facing the at least one impeller and a back side facing the second sealing device, a relief passage between the balance drum and a stationary part, a balance line connecting the back side with the suction side, a discharge opening arranged at the relief passage between the front side and the back side, and a connecting line connecting the discharge opening with the first sealing device.

The invention belongs to the technical field of hardware equipment, and relates to automatic punching forming processing equipment for a folding pin shaft barrel and an application method. A material-library air cylinder pushes folding blanks to transversely move backwards until the folding blanks are attached to a vertical-face feeding part, and a motor drives a transmission chain to do intermittent movement in a T-shaped groove. When the motor is stopped, a middle pressure-relief-type three-position and five-way electromagnetic valve is reversed and is reversed to a left position, and a pressing-plate pressing face presses the folding blanks; meanwhile, an upper die plunges down, punching-station folding blanks are converted into folding finished products. When the transmission chain transversely moves, the folding finished products located on a vertical-face punching part are pushed by pushing vertical faces and leave a lower die, and to-be-out-warehoused-station folding blanks arepushed by the pushing vertical faces to be located on the vertical-face punching part. A spring presses a pressing pin, and the spherical face of the pressing pin presses the plane parts of the punching-station folding blanks. By means of the automatic punching forming processing equipment for the folding pin shaft barrel and the application method, feeding and demolding can be automatically carried out, the efficiency is high, persons stand in the distance and operate, and do not need to touch the folding blanks with the hands, and the risk is small.

The invention discloses a reverse osmosis membrane off-line cleaning agent which is mainly prepared by mixing the following raw materials in percentage by weight: 0.3-0.7% of bactericide, 0.01-0.03% of surfactant, 0.05-1% of sodium citrate, 1-3% of caustic soda flakes, 3-6% of citric acid and the balance of water. The reverse osmosis membrane off-line cleaning agent disclosed by the invention has the advantages of good cleaning effect, no corrosion, environmental friendliness, high efficiency and increase of cleaning rate.

An anti-collision protection device for a derrick of a drilling rig is provided with a support frame, a clamping connection part is installed at the end of the support rod, and several guide parts are installed at one end of the clamping connection part. The supporting frame is composed of several supporting rods; the fastening connection part is composed of two Ω-shaped clips which are correspondingly connected with each other; the guide part is installed on the end of the fastening connection part through the connecting piece. The invention can avoid the impact of welding operation on the strength of the derrick and the damage of the anti-corrosion coating on the surface of the derrick; it is simple to manufacture and easy to use, and solves the anti-collision problem during the installation process of the derrick of the drilling rig; it reduces the difficulty of hoisting construction and overcomes the weather to a certain extent Factors affect offshore and land hoisting locations; at the same time, it reduces hoisting operation risks and safety hazards, and while reducing construction costs, it improves the efficiency of derrick installation and construction.

The invention discloses a prefabricated assembly type construction method for inter-pier collar beams of highway bridges of various grades. The method comprises the steps of step 1, prefabricating a collar beam (1); step 2, conducting field leveling on an inter-pier collar beam construction area; step 3, constructing a bottom collar beam (6); step 4, constructing a first section of pier column; step 5, chiseling and cleaning the top of an upper section pier column template (4); step 6, measuring and setting out the position of the prefabricated collar beam (1); step (7), prefabricating the prefabricated collar beam (1); step 8, arranging hanging rings (7); step 9, transporting and hoisting the prefabricated collar beam (1); step (10), binding remaining steel bars of the first section of pier column; step (11), mounting the rest templates of the first section of pier column; step (12), pouring and maintaining remaining concrete of the first section of pier column; step (13), removing the upper section pier column template (4); and step (14), performing concrete construction on the second-section pier column and the third-section pier column. The method has the advantages that the safety risk of high-place operation of workers is reduced, the construction period is shortened, and the construction cost is reduced.

The invention provides a condenser double-constant operation control method and system, and a secondary loop system. The method comprises the following steps of acquiring condenser parameters; judging whether the condenser achieves double-constant operation of a liquid level and pressure or not based on the condenser parameters; and when the condenser does not achieve the double-constant operation of the liquid level and the pressure, adjusting the valve position of a first adjusting valve at a circulating cooling water inlet in the condenser and the valve position of a second adjusting valve at a condensed water outlet in the condenser based on the parameters of the condenser till that the condenser achieves the double-constant operation of the liquid level and the pressure. According to the basic principle of condenser operation, from the thermodynamic angle of equipment operation, a PI control mode is adopted, a current measured value is judged and calculated, and the pressure and the liquid level of the condenser are controlled at the same time through a regulating valve at a condensed water outlet of the condenser and a regulating valve at a circulating cooling water inlet of the condenser; and double-constant operation of the pressure and liquid level of the condenser is realized.