77results about How to "Easy online maintenance" patented technology

The invention provides a real-time detection control system based on HFC network equipment and a detection control method thereof, wherein the real-time detection control system comprises a real-timecontrol detection device, a network management server and a client, wherein the real-time control detection device is used for detecting and controlling the HFC network equipment in real time; the network management server complete control management at an upper layer; the real-time control detection device partially adopts the corresponding detection control method based on DSP and PGA technologies to carry out fully digital signal transmission, and when terminal equipment in an HFC network completes register on the real-time control detection device, the real-time control detection device can process the inquiry of the network management server on the own working state of a front end, can also receive and process orders, i.e. various GET, SET, and the like which are distributed from theupper-layer network management server and remotely control managed equipment. Compared with the traditional technology, the invention well solves the problems of frequency drift and error rate in thewhole detection control process so that the real-time detection control system can be operated in a high-temperature severe environment, and can still ensure the accurate detection control even if a larger noise signal exists in the network.

The invention discloses a liquefied natural gas sampling and continuous collecting device, which comprises a sampling system, a gasification system, an on-line analysis system and a continuous collecting system, wherein the sampling system comprises an LNG sampling probe, a sampling pipeline and an LNG filling pipeline; a closed deep cooling cavity is formed at the front end of the LNG sampling probe; the sampling pipeline is arranged in the LNG sampling probe in a penetrating manner; the LNG filling pipeline is arranged in the LNG sampling probe in a penetrating mode and communicates with a closed deep cooling cavity; one end of the sampling pipeline penetrates through the closed deep cooling cavity and is connected to the gasification system; the gasification system is used for gasifyingan LNG sample conveyed by the sampling pipeline; the on-line analysis system is connected to an outlet of the gasification system and is used for carrying out on-line analysis on a gasified natural gas sample and providing gas component parameters; and the continuous collecting system is connected to the outlet of the gasification system and is used for continuously collecting the gasified natural gas samples.

The invention relates to an array flow velocity control valve structure suitable for incompressible fluid. The structure comprises a valve body, a valve base, valve cores, an upper cover and valve rods, wherein the base valve is arranged in the valve body, a plurality of throttle slices are arranged installed on the valve base, the throttle slices are positioned through positioning pins, each of the throttle slices comprises a parallel thin plate body and a rhombic pillar-shaped array structure, a guide base is installed on the throttle slices, balancing sealing rings are installed in the guide base, valve cores are installed in the throttle slices, the valve cores are connected with the valve rods, and the upper cover is installed on the valve body; and the upper cover is fixed on the valve body through a screw bolt and a nut. According to the structure, the fluid pressure is kept to be above the saturated vapor pressure, bubbles are avoided, and a cavitation phenomenon is eliminated; damages of inner parts of a valve, which are caused by energy blasting energy, are reduced; the valve is convenient to disassemble and clean, and on-line maintenance is facilitated; and the pressure is reduced step by step through flow rate control of high-speed incompressible fluid, the cavitation phenomenon is avoided, and the normal operation of the valve is guaranteed.

The invention relates to a hard sealing lifting type brake plug valve and a control method thereof. The hard sealing lifting type brake plug valve comprises a valve body, a valve seat, a valve plug, a valve rod, a gasket, a valve deck, studs, pins, a packing bushing, swing bolts, a packing pressing plate, swing bolts, a hand wheel, a hand wheel gasket, a nut, packing and a valve rod nut. The valve body and the valve deck are connected through the studs. The valve deck and the packing pressing plate are connected through the swing bolts. The valve rod is connected with the valve plug through a head flat-square part. A full-bore partial-rotation structure is adopted, the flow coefficient is large, and the opening and closing space is small. The metal-sealing, fireproof, anti-static and blowout prevention valve rod structure is adopted, and the hard sealing lifting type brake plug valve is suitable for high-temperature-resistant, high-pressure-resistant and strong-corrosion-resistant working conditions and is wide in application range. The packing structure can be replaced on line, and online maintenance is convenient. During operation, a sealing pair is disengaged, friction between opening and closing torque and the sealing pair is reduced, and the service life of the valve is prolonged.

The invention discloses a vacuum rainwater drainage system and a method. The system comprises a pump room, a water colleting tank, a water inlet pipe, a water outlet pipe and a water drainage river channel, wherein one end of the pump room is connected with the water colleting tank through the water inlet pipe, and the other end is connected with the water drainage river channel through a water outlet pipe; an electrical control unit and at least one vacuum control pump group is arranged in the pump room, and the electrical control unit controls the vacuum control pump group; and a liquid level measurement unit is arranged in the water collecting tank, and the liquid level measurement unit outputs signals to the electrical unit. The system and the method have the advantages that the starting of the pump unit requires no filling water, and the working efficiency is high; and the operation vibration of the device is low, and the failure rate is low; connecting pipes can be turned around, underground structures can be avoided, and the problem that construction is hard due to underground pipe networks are complex is solved effectively; capacity of a variable frequency regulation pump can be detected through a double-acting liquid level, and the performance of the system is reliable; and after the system control is upgraded, unmanned management of a pump station can be achieved, and management and human resource costs are saved.

The invention discloses a modular aerating/oxygenating device, and belongs to the field of environment protection equipment. The device comprises aerators, a square frame, a gas distribution pipe, gas distribution adapters, counterweights, buoys, an end fixing member, and riggings; multiple aerators are parallelly arranged in the square frame, one end of each aerator is connected to a gas distribution adapter, the gas adapters are connected to the gas distribution pipe, the other end of each aerator is sealed and fixed on the square frame; the counterweights are fixed under the four corners of the square frame through the riggings, and the other end of each rigging is provided with a buoy. The provided device can be used to treat polluted water body in the nature by oxygenating the water body, and is capable of being applied to the aeration system in the industries such as aquaculture, sewage treatment, and the like. The device can be installed in the water, which needs to be oxygenated, or the device can be installed on the bottom of a container containing water to be processed. The installation is simple, and the maintenance and exchanging are both very convenient. The device is composed of a plurality of modules, the combination is flexible, so the device can be used under different occasions, moreover, the production process is simplified due to the modular design, and the cost is very low.

The invention relates to a switching-on and switching-off method for a pipeline check valve and gate valve combination. The switching-on and switching-off method is characterized in that a check valveand a gate valve are arranged to be combined with valve elements in a coaxial or crossing or concentric or perpendicular or face-to-face or symmetrical or independent or rotary manner on a pipeline;and the check valve and gate valve combination is composed of a medium, a medium inlet pipeline, a valve body I, a medium outlet pipeline, a valve element valve rod I, a valve element valve rod II, fastening bolts, the valve element I, the valve element II and a valve body II. The switching-on and switching-off method capable of achieving multiple pipeline valve combination forms has the advantages that the structure is simple, operation is flexible to conduct, and maintenance and replacement are convenient to conduct. The problems of on-line maintenance, valve body and valve element replacement and the like are solved under the precondition that flowing of the medium of the power pipeline is not affected. Effective paths for on-line valve and valve element replacement are enriched.

The invention relates to a backup battery maintenance method, device and system and a storage medium. In the backup battery maintenance method, a control unit detects a power supply unit according toan externally transmitted discharge maintenance instruction, and when the power supply unit meets a discharge maintenance condition, a controllable power supply switches a mains supply of a power supply of communication equipment to a backup battery, so that the backup battery discharges through the communication equipment. And meanwhile, the control unit monitors the discharge process of the backup battery through the controllable power supply, and when the backup battery is completely discharged, the controllable power supply starts the mains supply to supply power to the communication equipment and charges the backup battery. The backup battery takes communication equipment needing to be powered as a discharge load, so that no extra load is needed, and the maintenance cost is reduced; and moreover, the controllable power supply controls the connection and disconnection of the commercial power, thereby achieving the charging and discharging maintenance of the backup battery, facilitating the online maintenance of the backup battery, saving the manpower and material resources, and effectively prolonging the service life of the backup battery.

The invention relates to a bidirectional multiport non-isolated DC converter and a control method thereof. The DC converter comprises at least two DC converter modules, and one end of each DC converter module is connected with a micro power grid; each DC converter module comprises an upper diode module, a lower diode module, a capacitor C1 connected with the upper diode module in parallel and a capacitor C2 connected with the lower diode module in parallel, and the upper diode module and the lower diode module are connected in series; the upper diode module comprises an upper diode switch T1 and a lower diode switch T2 which are connected in series, and the lower diode switch T2 is connected with a capacitor C3 in parallel; and the lower diode module comprises an upper diode switch T3 and a lower diode switch T4 which are connected in series, and the upper diode switch T3 is connected with a capacitor C4 in parallel. The control method comprises a positive bus voltage control process, a negative bus voltage control process, a positive bus current control process and a negative bus current control process. Each module of the application can achieve bidirectional flow of energy, and can specify voltage or power of a port as needed.

The invention provides a solid particulate matter heat storage and release device. The device is characterized in that a heat exchange pipe is arranged inside a heat storage and exchange container, aheat storage medium is arranged in the heat storage and exchange container and is located outside the heat exchange pipe, a heat exchange medium is circulated inside the heat exchange pipe, the heat storage medium is solid particulate matter such as sand, coal ash or coal slag. The invention further provides a solid particulate matter heat storage and release system. The system is characterized inthat the solid particulate matter heat storage and release devices are designed in a modular mode, and are divided into multiply layers in the vertical direction according to the temperature gradient, the multiple groups of the solid particulate matter heat storage and release devices are arranged at each layer in the horizontal direction, the heat exchange pipes of the solid particulate matter heat storage and release devices of the adjacent layers of the same group are connected end to end through connecting pipes, the free end of the heat exchange pipe at the bottommost layer of each groupis connected with a low-temperature medium mater pipe, and the free end of the heat exchange pipe at the uppermost layer of each group is connected with a high-temperature medium master pipe. The invention further provides a solid particulate matter heat storage and release method. The method is characterized in that a bidirectional flow design is adopted, the heat exchange medium flows from topto bottom during heat storage, and the heat exchange medium flows from bottom to top during heat release. According to the device, the system and the method, the system is simple, the maintenance is convenient, the cost is low, and the application range is wide.

The invention belongs to the technical field of a check valve of a nuclear power unit and particularly relates to a bypass check valve for a containment isolation system. The check valve disclosed by the invention comprises a valve body (1), a valve cover (11), a valve element (5), a valve flap (2) and a hold-down spring (6); the valve cover (11) is connected to the upper part of the valve body (1) by screw threads; the valve element (5), a valve cavity input passage and a valve cavity output passage are arranged inside the valve body (1); the lower end of the valve element (5) sleeved with the hold-down spring (6) is provided with the valve flap (2); and a section capable of being closed is formed by the valve flap (2) and the valve body (1). The check valve disclosed by the invention is effectively controlled to be opened and closed by arrangement of the hold-down spring and not only can meet the pressure relief requirement under an overpressure condition, but also can meet the sealing requirement under a static condition; moreover, the check valve disclosed by the invention can be installed on horizontal pipelines, vertical pipelines and pipelines with inclination angles and meets the requirement of changeability of the pipelines on site.

The invention relates to an adduction disc type pipeline angle valve capable of being adjusted to be opened and closed, which is mainly connected with an angle valve body through a positioning step at the upper end of a valve seat, the angle valve body, the valve seat, a sealing gasket and a T-pipe are fixed by valve body studs and valve body nuts, the top end of the valve rod penetrates through an upper cover and protrudes from the angle valve body, the upper cover is mounted on the angle valve body, a guide sleeve is fixed on the upper cover, a packing gasket, a first packing component, a packing spacer sleeve, a second packing component, a packing gland, a scraper seal and a packing press plate are arranged on the valve rod in sequence, and the upper cover, a sealing ring and the angle valve body are fixed by upper cover studs and upper cover nuts. With the adoption of the angle valve, the functions of small opening adjustment and opening and closing in the whole stroke can be achieved, the requirement of field process control can be completely met, the valve is good in dynamic stability and is convenient to maintain on line, the maintenance cost of a product is reduced, the possibility of medium leakage at the sealing position between the valve rod and packing is reduced, the valve is good in tightness, medium dead zones can be decreased, and material accumulation can be avoided.

The invention relates to a bellows parallel gate valve. Bellows wedge-shaped gate valves and bellows stop valves exist and are originally applied in present market, and have the defects of poor sealing property and short service life. The bellows parallel gate valve comprises a valve body and a valve cover, wherein a valve rod is arranged in the valve body; a bellows is arranged outside the valve rod in a sleeving mode; a valve element is arranged at the lower part of the valve rod. The bellows parallel gate valve is characterized in that a flow passage is arranged in the valve element; two flashboards parallel to each other are arranged on the flow passage; an elastic part is arranged between the two flashboards; the flashboards are fixed on a valve seat. A bellows structure is combined with a parallel gate valve, the performance requirement of zero leakage can be reached, the defects of the stop valves and the wedge-shaped gate valves are also avoided, and the bellows parallel gate valve is higher in sealing property and longer in service life.

The invention provides an online-maintained backflow preventer. The online-maintained backflow preventer comprises a casing provided with a water inlet valve, a water outlet valve and a drain valve. The inside of the drain valve is divided into an inner cavity and an outer cavity through a diaphragm; the inner cavity is communicated with a cavity between a first valve plate and a second valve plate through a channel on the casing; the outer cavity is communicated with an internal cavity of the casing. The drain valve is fixed inside the casing, and a drain valve seat is mounted under the drain valve; one end of a drain valve stem component is movably mounted in the drain valve seat, and the other end of the drain valve stem component plugs a drain outlet through a drain valve plate; a drain resetting device is arranged on a drain valve stem which penetrates the diaphragm in the drain valve and is fixed with the same. The water inlet valve, the water outlet valve and the drain valve can be removed freely; the casing is provided with an access hole. The online-maintained backflow preventer has the advantages that water waste caused by draining due to unstable water pressure is avoided and online maintenance is achieved.

The invention relates to an up-mounting type double-eccentricity ball valve which comprises a valve body, a ball body, a valve rod and an operating mechanism of the valve rod. A valve cavity and two medium channels arranged at two ends of the valve cavity are arranged inside the valve body, the ball body is arranged inside the valve cavity, two valve seats matched with the ball body are arranged at positions, corresponding to all medium channels, of the valve cavity, the valve body is provided with an opening enabling the ball body and the valve seats to penetrate through, a valve cover is arranged on the opening, the valve cover and the valve body are detachably connected, the valve seats are arranged to be soft valve seats, the ball body is in an eccentric structure, a diagonal line of a front end of the closing rotating direction of a section of the ball body is smaller than a diagonal line of a rear end of the closing rotating direction of the section of the ball body, wherein the section is perpendicular to a rotating shaft of the ball body, and the two valve seats are respectively arranged towards one side of the closing rotating direction of the ball body in an inclined mode. According to the technical scheme, the up-mounting type double-eccentricity ball valve has the advantages of largely improving service life of the ball valve and facilitating on-line repair.

The invention relates to a method for opening and closing a double-layer valve element assembly of a pipeline valve. The method is characterized in that an opening and closing method of a pipeline double-layer valve element cylinder valve and double-layer valve element check valve assembly structure and a pipeline double-layer valve element cylinder valve and double-layer valve element check valveassembly is adopted by the double-layer valve element assembly of the pipeline valve, and a double-layer valve element check valve has a double-layer valve element cylinder valve work state, an online production state and a online production stopping state. According to the method for opening and closing the double-layer valve element assembly of the pipeline valve, the problem that a cylinder valve and a check valve cannot achieve online maintenance and valve body and valve element replacement is solved; under the condition that medium flowing of a power pipeline is not stopped, a double-layer valve element cylinder valve and the double-layer valve element check valve are opened and closed, and online overhauling of the double-layer valve element cylinder valve and a valve element or a valve rod and a valve element of the double-layer valve element check valve is achieved. Especially, great convenience is brought to overhauling and replacing of singly used cylinder valves and check valves on poisonous and harmful power pipelines.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a system for realizing zero discharge of desulfurization wastewater in virtue of carrier gas extraction and bypass flue evaporation. The system comprises a pretreatment integrated treatment system, a carrier gas extraction and concentration system and an evaporative crystallization and solidificationsystem. The invention also discloses a method for treating wastewater by using the system. According to the system and the method for realizing zero discharge of desulfurization wastewater in virtue of carrier gas extraction and bypass flue evaporation in the invention, defects in the prior art are overcome; and the whole system has the advantages of simple process, low requirements on raw water,low later maintenance cost, capability of being driven by a low-temperature heat source, insensitivity to temperature change and the like, can finally ensure that desulfurization wastewater is completely evaporated to dryness, serves as a terminal for wastewater treatment of a power plant, and truly realizes zero discharge of wastewater of the power plant.

A double-eccentric ultralow temperature butterfly valve comprises a valve body, a valve rod and a butterfly plate. The double-eccentric ultralow temperature butterfly valve is characterized in that a manhole is formed in the valve body, and an upper maintenance cover is arranged at the position of the manhole; a sealing component composed of a sealing ring, a pressing ring and a jacking and pressing component is included; the inner side face of the sealing ring is sealed with the butterfly plate, the jacking and pressing component comprises a locking ring, a plurality of jacking and pressing screws arranged on the locking ring and locking nuts connected with the jacking and pressing screws, the end portions of the jacking and pressing screws are pressed on the outer end face of the pressing ring, a circular bead face is arranged at the end, away from the pressing ring, of the locking ring, and a compression ring compressed on the circular bead face is inserted in the inner cavity wall of the valve body. Through the structure, the sealing ring is convenient to replace online, and the online maintenance of the valve body is more convenient and faster. In the maintenance process, only the upper maintenance cover needs to be opened, and the sealing component is dismounted one by one. In addition, the position of the pressing ring is controlled by adjusting the jacking and pressing screws, the compression amount of the sealing ring can be adjusted, and therefore the sealing performance of the valve is guaranteed, and the safe reliability of the valve is improved.

The invention discloses a low-temperature up-mounting type fixed ball valve. The low-temperature up-mounting type fixed ball valve comprises a ball body, a valve seat and a valve body, wherein the valve seat is arranged between the ball body and the valve body; the valve seat comprises a fixator and a spring base, which are of split type structures; the fixator comprises a convex end and a concave end, wherein the convex end is in contact with the ball body; the spring base and the valve body are sequentially arranged on the concave end from left to right; a sealing slot is formed between the bottom of the valve body and the upper surface of the concave end; a spring energy-storage sealing ring is arranged in the sealing slot; the spring base is of an L-shaped structure; the bottom of the spring base is equipped with a spring base positioning lug boss; the spring base positioning lug boss extends into the sealing slot, and is used for reducing transverse moving space of the spring energy-storage sealing ring; and the ball valve further comprises a pre-tightening nut which is mounted above the convex end, and one end of the pre-tightening nut is connected with the spring base. The low-temperature up-mounting type fixed ball valve is simple in structure, is convenient to mount and dismount, improves the sealing effect of the valve seat and the valve body, and prolongs the service life of the valve seat.