172results about How to "Meet explosion-proof requirements" patented technology

The invention discloses a steel wire rope twist direction climbing robot. The steel wire rope twist direction climbing robot includes a plurality of modules, wherein climbing devices are arranged in outer shells of the modules, the climbing devices include tensioning supports, rolling wheels are mounted in tensioning supports, rubber sheets are arranged on the circumferences of the outer edges ofthe rolling wheels, shafts are arranged on the back sides of the tensioning supports, holes are formed in the outer shells close to the shafts, linear bearings are mounted at the positions of the holes, the shafts of the tensioning supports penetrate through the linear bearings and the holes, limiting anti-loose nuts are mounted on shafts outside the outer shells, and springs are further arrangedbetween the back sides of the tensioning supports and the inner walls of the outer shells. Compared with the prior art, the steel wire rope twist direction climbing robot can roll in the direction ofa spiral line twisted in a steel wire rope, the needed driving force is smaller and stable, and the bearing capacity is high; and the climbing robot can work under a special environment and can meet the requirement of anti-explosion; and the shafts of the tensioning supports move telescopically relative to the linear bearings, and the certain buffering obstacle crossing ability and the disturbanceresistant capacity are achieved.

The invention discloses a hydraulic control system of an ocean platform hoisting mechanism, and belongs to the technical field of hydraulic control systems of ocean platforms. The hydraulic control system comprises a hand-operated pilot control valve set, a hydraulic control reversing main valve set, a balance valve set, a hydraulic variable control valve set and a two-position four-way reversing valve. A first oil outlet and a second oil outlet of the hand-operated pilot control valve set are communicated with a first control oil opening and a second control oil opening of the hydraulic control reversing main valve set respectively. A first oil outlet and a second oil outlet of the hydraulic control reversing main valve set are communicated with a rising cavity of a hydraulic motor and a falling cavity of the hydraulic motor respectively through the balance valve set. The hydraulic variable control valve set is communicated with a control oil opening of the two-position four-way reversing valve. An oil inlet of the two-position four-way reversing valve is communicated with the first oil outlet of the hydraulic control reversing main valve set. A first work oil opening and a second work oil opening of the two-position four-way reversing valve are communicated with a minimum variable cavity of the hydraulic motor and a maximum variable cavity of the hydraulic motor respectively. By controlling the displacement switching of the hydraulic motor, the hoisting mechanism has the function of switching between the light-load high speed and the heavy-load low speed and meets the requirement for explosion prevention.

The invention discloses a self-recovery stop type protection circuit for a low-voltage and high-power safety barrier. The self-recovery stop type protection circuit comprises a power switching circuit which is connected between a non intrinsic safety input circuit and a load and used for controlling switch-on and switch-off of a circuit, a current detection circuit which is connected with the power switching circuit and used for detecting current in the circuit in real time, an overcurent and shortcircuit judgment circuit which is connected with the current detection circuit, a switch-off pulse output circuit which is connected with the overcurent and shortcircuit judgment circuit, and a driving circuit which is connected with the switch-off pulse output circuit, wherein the input end of the overcurent and shortcircuit judgment circuit is connected with a reference circuit; the reference circuit is connected with the non intrinsic safety input circuit; and the driving circuit comprises an oscillation circuit for making the power switching circuit automatically re-switch on after the power switching circuit is switched off. The self-recovery stop type protection circuit has a simple structure, low power loss, high output power, a wide application range and high popularization and application value; the normal transmission of high-power electric energy is not influenced; and a requirement for intrinsic safety output is met.

The invention discloses an intelligent fireproof and explosion-proof safety cabinet system for hazardous chemical substances. The intelligent fireproof and explosion-proof safety cabinet system comprises a monitoring host and a plurality of fireproof and explosion-proof safety cabinets. Each fireproof and explosion-proof safety cabinet is connected with the monitoring host, internal cabinet information detected in real time can be transmitted to the monitoring host, left side doors and right side doors are arranged on the front surfaces of cabinet bodies, automatic closing devices used for automatically closing the doors are arranged on the left side doors and the right side doors, filters are arranged on the tops of the cabinet bodies, exhaust openings are formed in positions above the filters, fans are arranged on the exhaust openings, air inlets are formed in the side walls of the cabinet bodies, and fire disaster automatic closing plates for the air inlets are arranged above the air inlets and are suspended on the side walls of the cabinet bodies by high-temperature fuse wires; automatic closing devices for the exhaust openings are arranged between the exhaust openings and the filters. The intelligent fireproof and explosion-proof safety cabinet system for the hazardous chemical substances has the advantages that the multiple safety cabinets can be monitored by the monitoring host in an online manner in real time, so that the concentration of hazardous gas in the cabinets and the internal temperatures and the internal humidity of the cabinets can be assuredly controlled in real time, air can be actively exhausted by the fans under the control, and the internal safety of the cabinets can be guaranteed.

The invention relates to automatic polishing and grinding equipment for an inner hole of a metal pipe. According to the automatic polishing and grinding equipment for the inner hole of the metal pipe,the problems that when the inner wall of the metal pipe is polished and ground, the production efficiency is low, the workshop environment is polluted, and explosion is likely to occur are solved. The automatic polishing and grinding equipment is characterized in that a pressing wheel device (8) and a supporting wheel device (9) are arranged on the upper portion and the lower portion, at a thirdmaterial blocking device (6), of an inclined sliding table (2) correspondingly; polishing devices (11) are arranged on the two sides of a dustproof shell (7) correspondingly, and the dustproof shell (7) communicates with a draught fan through an air suction pipeline (12). The automatic polishing and grinding equipment can be controlled through a PLC, the automation degree is high, and the production efficiency is effectively improved; and a relatively-closed polishing space is formed in the dustproof shell, so that dust generated during polishing does not diffuse in a workshop, pollution to the workshop environment is avoided, dust explosion accidents are avoided, and the anti-explosion requirement is met.

The invention relates to a direct connecting flame proof oilless vortex vacuum compressor. The technical problem to be solved by the invention is to provide a motor and a compressor which have higher concentricity, small shake and lower low noise, further increase the compressive efficiency and reduce the mechanical loss. The reasonable and effective thermal design causes that the compressor and the motor both have good heat dissipation and ensure a machine to work normally. The semi-closed or the total closed structural design realizes the no leakage of the flame proof oilless vortex vacuum compressor. The technical proposal to solve the problem is that a main shaft is connected with a driving disk by a needle bearing and provided with a shaft gland before extending a motor shell; a flame proof plate is arranged between a machine frame and the motor shell and a non-magnetic metal thin wall separation sleeve is fixed in a sealing way between the flame proof plate and the bottom of the motor shell; a stator, the machine frame, the flame proof plate and the motor shell form a heat dissipation system which are mutually communicated. The vacuum compress is applied to the application field of low compression ratio flammable and explosive gas compression and evacuation.

The invention provides a software tank liquid level measuring instrument and method, relating to liquid level measuring techniques, which not only have the characteristics of simplicity in measuring, high accuracy, low cost, convenience for mounting and the like, but also can satisfy with severe environment requirements, such as fields, explosion-proof places, low temperature and the like. The software tank liquid level measuring instrument is provided with a liquid storage device, a pressure sensor, a height measuring bar, a tee and a liquid level displaying instrument, wherein the liquid storage device is arranged at the top of a soft tank body; indicating liquid is prestored in the liquid storage device; the pressure sensor and the height measuring bar are arranged on the ground; the liquid storage device, the pressure sensor and the height measuring bar are mutually communicated through the tee; the liquid storage device is connected with one outlet of the tee through a first hoseand a first valve; the pressure sensor is connected with a second outlet of the tee through a second hose and a second valve; the height measuring bar is connected with a third outlet of the tee through a third hose and a third valve; and the output signal end of the pressure sensor is electrically connected with the liquid level displaying instrument.

A detecting device for an optical fiber oil-water interface comprises a narrow-linewidth laser light source, a circulator, formed tail fibers, length ruler, a photoelectric detector and a signal processing and displaying module. The narrow-linewidth laser light source is connected with the forming end tail fibers through the circulator, the free end of the forming end tail fibers and the length ruler are arranged side by side, and a third port of the circulator is connected with the signal processing and displaying module through the photoelectric detector. The detecting method using the detecting device includes the steps that (1), before measurement, the power measuring value of the device in air is measured and recorded by using the tail end face of the free end of the forming end fibers; (2), the forming end optical fibers and the length ruler which are arranged side by side are immersed in oil-water mixed liquid to be detected and perpendicular to the liquid level, and when the power measuring value changes, reflective power and length ruler readings are recorded; (3), the forming end optical fibers and the length ruler are immersed further, and when the power value changes again, the reflective power and the length ruler readings are recorded; (4), the difference value of the length ruler readings in the step (2) and the step (3) is calculated and serves as the thickness of an oil layer.

The invention discloses a shaft inspection system and a steel wire rope movement device thereof. The steel wire rope movement device comprises steel wire rope movement tracks and a movement mechanism;the movement mechanism comprises a shell, a driving motor and several movement idler wheels; the shell is provided with a steel wire rope locking mechanism; the movement idler wheels comprise a driving idler wheel and driven idler wheels; each movement idler wheel is positioned and supported through one idler wheel shaft; a motor base of the driving motor is fixedly installed on the shell, and the power output end of the driving motor is connected with the idler wheel shaft for supporting the driving idler wheel through a speed reducer; the driving idler wheel can drive all the driven idler wheels to move along the steel wire rope movement tracks under power drive of the driving motor. It can be seen that by means of the shaft inspection system, while a shaft inspection robot conducts inspection on the longitudinal direction of a shaft along a steel wire rope, the steel wire rope can move in the circumferential direction of the shaft wall, and thus the problem that a mine monitoring network constituted by the inspection robot cannot cover the interior of the shaft is solved.

The invention relates to a dedicated lubricating oil of a submersible motor pump. The dedicated lubricating oil consists of the following components: 98.5 percent to 98.8 percent of base oil, 0.7 percent to 0.9 percent of highly effective antioxidant, 0.0004 percent to 0.0006 percent of electric insulating agent and 0.4 percent to 0.6 percent of detergent dispersant (the total weight is calculated by 100 percent), wherein, the base oil is hydrofining base oil; the highly effective antioxidant is 2,6-di-tert-butylphenol (T501); and the electric insulating agent is dimethyl silicone polymer (T901) and the detergent dispersant is polyisobutene succimide (T154). The dedicated lubricating oil of the submersible motor pump has the advantages of antiknock (the flash point is more than 170 DEG C), long service life (testing of oxidation stability ASTM D943, more than 2000h), wear resistance (Pb value reaches 400N in a four-ball test) and high voltage against breakdown (the breakdown voltage is more than 30000V).

The invention relates to the technical field of drilling rig derrick detection, and especially relates to a drilling rig derrick state online detection system. The system comprises a wind speed and direction detection device, a tilt angle detection device, a static force detection device, a data exchanger, a processor and a client side. The wind speed and direction detection device, the tilt angle detection device and the data exchanger transmit real-time data to the processor, the processor performs storage, analysis and other operation on the real-time data, and the client side calls the data from the processor to perform corresponding operation. The invention further discloses a drilling rig derrick state online detection method. The invention established the drilling rig derrick state full-life-cycle online monitoring system and method integrating structure monitoring, remote transmission and remote diagnosis into one body.

The invention relates to an explosive-proof cabin crane capable of centrally and fixedly arranging a driving device at an end part. The explosive-proof cabin crane is characterized in that three rails are arranged under a cabin ceiling in a longitudinal direction; a double girder bridge is movably connected with the three rails through pulley blocks; a translation trolley is arranged in the middle part of the double girder bridge; a hoisting and lifting driving device and a transverse translation driving device are respectively arranged at both sides of the upper surface of the bottom part of a cabin, a longitudinal translation driving device is arranged in the middle part of the cabin, the hoisting and lifting driving device is connected with a hook assembly on the translation trolley through a steel wire rope and the pulley blocks, and the longitudinal translation driving device is connected with the double girder bridge through a transmission chain, an upper chain wheel assembly and a dragging chain; the transverse translation driving device is connected with two pulleys on the translation trolley through two steel wire ropes and the pulley blocks. The explosive-proof cabin crane has the advantages that by adopting a steel wire rope penetrating and winding manner, the breakthrough of a transmission technique is realized, a following cable of the explosive-proof cabin is not needed, the problem of difficulty in explosion prevention of the cabin crane in dangerous occasions is solved, the installation and maintenance cost of a system is reduced, and the lifting clearance height is increased.

The present invention provides a skid-mounted multifunctional anti-blowout pipe pressure test system, which comprises a pressure test unit, a power unit and an automatic control unit, wherein the power unit mainly comprises a diesel fuel air compressor, a gas storage tank, a compressed air filter and a ball valve, the pressure test unit mainly comprises a rapid water injection pump, a high-pressure water injection pump, a water box, a high-pressure water injection pipeline, a rapid water injection pipeline, a plug valve, a pressure gauge and a chemical reagent injection system, the rapid water injection pump and the high-pressure water injection pump adopt the dual pump connection in parallel, the automatic control unit mainly comprises various electromagnetic valves arranged on the pressure test unit, an anti-explosion box, PLC, a printer and a laptop, the power unit is connected with the pressure test unit, and the pressure test unit is connected with the automatic control unit. According to the present invention, the skid-mounted structure is adopted, the transportation is convenient, each skid body can be separately used under the special circumstance, the double pump connection in parallel is used to perform the grading pressure test, the low-pressure pump is used to rapidly empty the injected water, the high-pressure water injection pump is used to pressurize, and the pressure test work efficiency is improved.

The invention provides an automatic assembling system for a standard test motor and an assembling method. The automatic assembling system comprises a plurality of mobile fixture platforms used for placing and handling all parts of a to-be-assembled standard test motor; a multi-degree-of-freedom manipulator used for clamping and placing the parts is fixedly installed at the in-between position of the mobile fixture platforms; a conveying line body used for clamping and fixing the to-be-assembled parts is arranged at the side edge of the multi-degree-of-freedom manipulator and the mobile fixtureplatforms; and the rear side edge of the conveying line body is provided with a tightening device used for tightening the to-be-assembled parts. The system can be used for the automatically assembling the standard test motor, and then, a traditional manual assembling process is replaced, so that the assembling efficiency is improved and the labor intensity of an operator is reduced; in addition,since the motor is assembled with powder, the automatic assembling system grasps and places the parts in the assembling process of tightening or disassembling by means of the six-degree-of-freedom manipulator, so that the assembling safety is enhanced, and the quality and the performance of products are improved.

The invention discloses a switch control apparatus of AC load, an AC control system and a refrigeration device. The switch control apparatus comprises an electronic switch component, wherein the electronic switch component is composed of a rectifier bridge and a transistor, the electronic switch component is used for controlling the AC load to work or not; and a driving module, wherein the driving module comprises a control signal receiving end and a driving signal output end, the driving signal output end is connected with a control end of the transistor, the driving module receives a control signal through the control signal receiving end and generates a driving signal according to the control signal so as to drive the turn on or turn off of the transistor so as to control the on-off of the AC load. The apparatus generates no arc stretching phenomenon at the moment of power off of the AC load, satisfies the explosion protection demand of the switch and improves the safety.

The invention relates to a simple wearable filtering positive-pressure ventilation device. The simple wearable filtering positive-pressure ventilation device is characterized in that the simple wearable filtering positive-pressure ventilation device mainly comprises a gas generating component, a filtering component, a positive pressure collecting component and a protective equipment interface component; the gas generating component comprises a shoe-shaped pedal type plastic air pump and a unidirectional air inlet/air outlet valve (hole); the filtering component comprises a 3M-level filtering fabric and an anti-deformation plastic negative pressure pipe; the positive pressure collecting component comprises a gas input valve (access hole), an elastic air bag, a filtering element, a positivepressure gas output element and a pressure sensitive element; the protective equipment interface component comprises a positive pressure output interface, and the positive pressure output interface can abut against a poison preventing mask, a protective head cover and a sealing protective garment; by means of the simple wearable filtering positive-pressure ventilation device, external air can be introduced into the air bag for storage through walking or stepping, and particulate matters and harmful gas in the air are blocked by the filtering element; three layers of dirt-preventing filtering fabrics are arranged in the air bag, the pressure of the air bag is kept by a pressure reducing valve, and the air bag is combined with protective equipment to supply breathing cleaning air.

The invention discloses an explosion-proof scale cleaning tool for a wave guide tube of a radar liquid level gauge of a floating-roof oil tank, and belongs to the technical field of a cleaning tool for a wave guide tube of a radar liquid level gauge of a storage tank. The explosion-proof scale cleaning tool comprises a rotating scale cleaning part, an extension rod part, an operating platform part and an operating handle part, wherein one end of the extension rod of the extension rod part is connected with the rotating scale cleaning part, and the other end of the extension rod of the extension rod part penetrates through the operating platform part to extend out of the wave guide tube to be connected with the operating handle part; the rotating scale cleaning part comprises a rotating center rod; a plurality of connecting supports are hinged on the peripheral surface of the rotating center rod; a spring is arranged between each of the connecting supports and the rotating center rod; and a scraping plate is hinged to the outer end of each of the connecting supports. The explosion-proof scale cleaning tool for the wave guide tube of the radar liquid level gauge of the floating-roof oil tank, oil stain in the wave guide tube of the radar liquid level gauge is effectively cleaned, and the data reading accuracy of the radar liquid level gauge is ensured.

The invention relates to the manufacturing field of a motor, specifically to an explosion separation structure for a shaft, comprising a shaft, an explosion separation sleeve and a bearing. The explosion separation sleeve is embedded on the shaft and is corresponding to an inner cover of the bearing; the embedding uses a heating installation method; the explosion separation sleeve is embedded on an explosion separation surface of the shaft; the outer diameter of the explosion separation sleeve and the inner cover of the bearing form the gap explosion separation to satisfy the explosion separation requirements; when a stator and a rotor deflect or the inner parts of the stator and the rotor appear winding short circuit to produce abnormal substances in the rotation process of the motor, the inner cover of the bearing and the explosion separation sleeve on the shaft rub with each other; so only the inner cover of the bearing and the explosion separation sleeve are replaced to save time and labor and reduce the loss; compared that the shaft is disassembled from the rotor and the shaft is processed again, the structure saves the time, improves the efficiency and reduces the loss.

The invention relates to an oil tanker ballast water management system installing and design method. An electrolysis unit of a ballast water management system is arranged in an engine cabin, water is taken from a seawater main pipeline of the engine cabin for electrolysis, generated sodium hypochlorite solution upwards passes through a main deck from a medication feeding pipeline to reach a position above a pump cabin and then downwards passes through the main deck to be filled into a ballast water loading main pipeline of the pump cabin, and the medication feeding of active substances is realized. A neutralization unit is arranged on the engine cabin or a superstructure, a medication feeding pipeline of the neutralization unit is also horizontally paved above the main deck to reach a position above the pump cabin and downwards passes through the main deck to be connected to a ballast water discharge main pipeline of the pump cabin, and the addition of neutralization reagents is realized. In order to prevent ballast water, the active substances and the neutralization reagents in a dangerous region from flowing to a safe region, a check valve is arranged on each medication feeding pipeline, and the one-way flowing of the solution in the pipelines from the back side to the front side is ensured. The oil tanker ballast water management system installing and design method has the advantages that the ship anti-explosion requirement is met, the manufacture cost and the safety risk of the whole system are reduced, the operation of the oil tanker ballast water management system is good, and the treated water reaches the discharge requirements.

The invention discloses a passive cooling system for a coal mine rescue capsule. The system comprises an air channel arranged inside a personnel capsule and used for conveying cold air, and a concrete foundation arranged outside the personnel capsule. One end of the air channel is enclosed, and the other end of the air channel is sequentially connected to a hand-operated blower fan and a return air inlet. Multiple gas distributors and condensed water outlets are arranged on the air channel. Each condensed water outlet penetrates a base plate of the personnel capsule through an explosion-proof port, and then is downwardly connected to a one-way water discharging valve. Heat dissipation panels and heat pipes connected to the heat dissipation panels are pre-embedded in the concrete foundation, wherein the heat pipes are partially pre-embedded in the concrete foundation. The heat pipes enter the personnel capsule and the air channel through the explosion-proof ports arranged on the base plate of the personnel capsule, and the top portions of the heat pipes in the air channel are sleeved with heat dissipation jackets. The system is low in consumption, is safe, and can effectively cool and dehumidify the rescue capsule.

The invention discloses a combustible gas alarm control system comprising eight detector modules used for acquiring the concentration of combustible gas of a site in real time, a branching interface module used for receiving combustible gas concentration signals transmitted by the eight detector modules at 4-20ma and converting the combustible gas concentration signals into voltage signals, and a main controller module used for receiving the voltage signals output by the branching interface module and judging the concentration of combustible gas of the site according to data acquired in real time. The output end of the main controller module is connected with a display module, an acousto-optic alarm module and an optical coupling isolation module. The output end of the optical coupling isolation module is connected with a linkage module. The main controller module is connected with a communication module for communicating with a principal computer. The combustible gas alarm control system further comprises a main power supply module and a standby power supply module. The combustible gas alarm control system has high stability and strong anti-interference ability, and facilitates real-time observation of the complex condition of the site.