28results about How to "Reliable maintenance" patented technology

The invention relates to the technical field of carbon emission, in particular to a carbon emission CEMS (Continuous Emission Monitoring System) remote monitoring module based on a cloud server, which comprises front-end monitoring equipment, a cloud server platform and a user side, wherein the front-end monitoring equipment comprises a flue gas analyzer, a flow meter, a temperature sensor and a pressure sensor, and is responsible for acquiring carbon emission data in real time and uploading the data to the cloud server platform through a network module; wherein the cloud server platform stores and analyzes data uploaded by the front-end monitoring equipment by using big data processing and cloud computing technologies, and provides real-time alarm, historical data query and trend analysis functions. According to the carbon emission CEMS remote monitoring system, more efficient data transmission, more accurate carbon emission prediction and more reliable equipment maintenance can be realized, and self-learning and optimization of the system are realized through an adaptive algorithm, so that the performance and stability of the system are continuously improved.

The invention relates to the technical field of oil and gas exploitation equipment, and provides a plunger pump packing state monitoring method and device.The method comprises the steps that the packing pressure of each packing cavity is obtained through a packing pressure detector installed at the position of the packing cavity in a fluid end valve box of a plunger pump; the discharge pressure of the fluid end valve box is obtained; and monitoring the packing state of the plunger pump according to the discharge pressure of the fluid end valve box and the packing pressure of each packing cavity. The method can timely and accurately identify the state of the packing, timely find the fault of the packing, timely maintain and protect the packing, reduce the damage of the fluid end valve box body caused by the damage of the packing, prolong the service life of the valve box, reduce the sudden fault shutdown of the plunger pump caused by the fault of the packing, improve the use efficiency of the plunger pump on site, and reduce the cost. Therefore, the plunger pump is more stable and reliable in operation, more targeted and more convenient to maintain, and the maintenance time and the maintenance cost are reduced.

The invention provides a large floating body connecting system and a using method thereof. The large floating body connecting system is used for connecting a first large floating body and a second large floating body which are adjacent on the sea and comprises a plurality of prestress tensioning devices and a plurality of strands of limiting mooring ropes, the prestress tensioning devices are connected with upper structures of the large floating bodies, and the limiting mooring ropes are connected with lower floating boxes of the large floating bodies. Each pre-stress tensioning device comprises a pre-stress cable and a pre-tensioning cable which are arranged side by side; the plurality of prestress tensioning devices are configured to keep fit connection between the two large floating bodies under normal sea conditions; and when the two large floating bodies cannot maintain attached connection under the severe sea condition, the tensioning state of the prestressed cable and the pre-tensioning cable is relieved, and non-attached connection between the first large floating body and the second large floating body is achieved. The method is suitable for mutual connection of a plurality of deep and far sea large floating bodies, and a reliable solution is provided for floating body development and design of ship and ocean engineering and ocean energy development.

The utility model discloses an engine crankcase cover engine oil filtering oil way and an engine with the engine crankcase cover engine oil filtering oil way, and the engine crankcase cover engine oil filtering oil way comprises a crankcase cover and a filter. A plurality of communicated engine oil ducts are arranged in the box cover and communicated with the engine oil pump and all stages of oil ducts, and a filtering cavity is formed in the outer side of the box cover; the filter is arranged in the filtering cavity and communicated with the engine oil duct, the engine oil duct comprises an oil inlet duct, one end of the oil inlet duct is communicated with the engine oil pump, the other end of the oil inlet duct is communicated with the filtering cavity, the engine oil duct further comprises an oil outlet duct, one end of the oil outlet duct is connected with the filtering cavity, and the other end of the oil outlet duct is communicated with all stages of oil ducts. The engine oil pump is conveyed into the engine oil passage in the box cover, passes through the oil inlet passage and then enters the filter in the filter cavity; and after being filtered by the filter, the oil can flow out of the oil outlet channel and is conveyed to each stage of oil channel. And the filter is arranged on the outer side of the crankcase, so that the filter is convenient to disassemble, maintain and clean, and heat dissipation of engine oil is facilitated.

The disclosed technology relates to a secondary battery, including: an electrode assembly in which a plurality of unit cells are stacked and an electrode terminal. In one example, respective electrode tabs of the unit cells, which extend from the electrode assembly, are gathered together and electrically connected to an electrode terminal of the secondary battery, and the electrode tab of each unit cell includes an excess length part corresponding to the swelling of the electrode assembly.

The invention discloses a spin lock type inner core integrated multi-stage pump without a main pressure-bearing stud. The pump mainly comprises a pump inner core and a spin lock shell, the pump inner core is detachably installed on the inner wall of the spin lock shell, the pump inner core comprises a pump shaft, a spin lock cover and a connecting cover are installed at the two ends of the pump shaft respectively, a plurality of spin lock lugs are arranged on the circumference of the spin lock cover, and a plurality of blocking pieces are arranged at an opening in the side, close to the spin lock cover, of the spin lock shell. A gap between every two blocking pieces forms a spin locking groove allowing the spin locking lug to pass through, a sliding groove is formed in the circumference of the inner wall of the spin locking shell, a through hole is formed in the outer wall of the side, close to the spin locking cover, of the spin locking shell, and the wedge-shaped locking block penetrates through the spin locking shell through the through hole and is fixed to the outer wall of the spin locking shell through a compression bolt. The pump inner core integrated assembly structure is designed, so that a system pipeline does not need to be disassembled when the pump is maintained, and only the whole pump inner core needs to be directly disassembled from the pressure-bearing shell, the field construction amount is greatly reduced, the maintenance time is shortened, and the disassembly and assembly difficulty of a pump set is simplified.

The present invention relates to the field of intelligent parking for commercial vehicles, and discloses an EPB valve system, an EPB valve assembly and an intelligent parking control method for commercial vehicles, wherein an air inlet is directly connected to a relay valve cavity; one is connected to a first solenoid valve, and another is connected to a pneumatic control valve; the first solenoid valve air inlet gas path is connected to the air inlet, and the air outlet gas path is connected to the control cavity of the pneumatic control valve and connected to a two-way check valve; the control cavity of the pneumatic control valve is connected to the first solenoid valve and the second solenoid valve; the air outlet gas path of the third solenoid valve includes an air path connected to the two-way check valve; the air outlet gas path of the second solenoid valve is connected to the exhaust port; the two-way check valve is connected to the upper cavity of the relay valve, the air outlet for connecting the parking is connected to the relay valve, and the exhaust port is connected to the relay valve. The valve system has the advantages of using fewer parts, convenient control, and no damage to the solenoid valve.

The application discloses a servo cut-off valve group, which comprises a first valve body and a second valve body integrated on a valve seat. Both the valve bodies are provided with valve cavities, and the valve cavities are internally provided with valve spools driven by a servo motor through a screw rod. The valve bodies are provided with outer ring channels communicated with inlet and outlet of the valve seat on the side surfaces, the outer ring channels are communicated with the valve cavities through a plurality of uniformly distributed lateral flow channels, and the inner walls of the valve cavities are further provided with inner ring channels. The longitudinal flow channels at the bottoms of the two valve cavities are communicated with each other through channels in the valve seat. When the two valve spools synchronously rise above the lateral flow channels, fluid can sequentially pass through the flow channels, and the valve is opened; when the two valve spools synchronously descend to completely cover the lateral flow channels, the valve is closed. The two valve cavities are communicated at the bottoms to form a pressure balance cavity, so that the valve spools are hardly subjected to axial thrust when the valve is closed, and high pressure is converted into sealing force in the radial direction of the valve spools, thereby fundamentally solving the high pressure leakage problem of traditional cut-off valves, and the application is especially suitable for high pressure equipment such as filter presses.

The utility model belongs to the technical field of gas extraction pipeline water drain, specifically is a kind of coal mine gas extraction pipeline water drain. Include: extraction pipeline, the extraction pipeline is horizontally arranged, and the opening is set in extraction pipeline bottom;Water drain main part, the water drain main part is connected in extraction pipeline bottom, and is communicated with opening;The top of water drain main part is equipped with the water inlet that is communicated with extraction pipeline, bottom is equipped with drain, the inside of water drain main part is equipped with check valve for controlling water accumulation discharge;The check valve includes valve seat and the ball float for sealing this valve seat, ball float is arranged on limit rod, limit rod is provided with return spring, and return spring supports ball float.The utility model effectively solves the problem of small volume and easy water accumulation caused by the height restriction of traditional vertical water drain.

The utility model discloses an airborne pod environment control system, and relates to the technical field of airborne pod environment control systems. The device comprises a liquid supply assembly, the liquid supply assembly comprises a self-pressurization oil tank and a shielding type motor pump, and the self-pressurization oil tank comprises a front end cover, a small shell, a large shell and a rear end cover; a small piston is arranged in the small shell, a large piston is arranged in the large shell, and the small piston and the large piston are connected through a piston rod; the shielding type motor pump comprises a motor shell, a pump shell, a pump, a motor rotor assembly and a motor stator assembly. A shielding sleeve is arranged between the motor rotor assembly and the motor stator assembly. The problems of heat dissipation, leakage and the like caused by cavitation, pressure fluctuation and pump flow reduction can be avoided, the filling efficiency of cooling liquid is improved, and a system is guaranteed to be easy to maintain; and meanwhile, the purposes of self-pressurization, reliable sealing and controllable temperature can be achieved.

An access node transmits, in a downlink signal having a series of subframes, a beam-formed reference signal in subframes, where the beam-formed reference signals are transmitted in fewer than all of the subframes of the downlink signal. A first subset includes beam-formed reference signals corresponding to a first frequency or first localized range of frequencies, and a second subset includes beam-formed reference signals corresponding to a second frequency or second localized range of frequencies. The second frequency or second localized range of frequencies is spaced apart from and differing from the first frequency or first localized range of frequencies. A user equipment, UE, receives, in the downlink signal, the beam-formed reference signal in each of a plurality of subframes. The UE performs mobility management measurements using at least the first subset of the received beam-formed reference signals and performs RLM using the second subset of the received beam-formed reference signals.

The present invention provides a thermally conductive composition comprising (A) an organopolysiloxane containing at least two alkenyl groups, (B) a hydrogenorganopolysiloxane containing at least two hydrosilyl groups, (C) a thermally conductive filler, and (D) a reaction rate controlling agent, wherein in measurement using a viscoelasticity measuring apparatus under conditions of 35°C, a shear mode, a frequency of 1 Hz, and a strain of 10%, a storage modulus G'1 after 3,600 seconds from the start of the measurement is 2,000 Pa or less, and a storage modulus G'2 after 7,200 seconds from the start of the measurement is 4,350 Pa or more, and wherein viscosity measured at 25°C and a shear rate of 10 rpm is 220 Pa·s or less. According to the present invention, it is possible to provide the thermally conductive composition that has good workability and maintains reliability as a product, over a relatively wide temperature range.

The invention provides a magnetic suspension bearing and a control method thereof, a magnetic suspension motor and a fresh air ventilator. The magnetic suspension bearing comprises a plurality of stator windings which are annularly distributed; a rotor; a stator winding box; and replacing the device. According to the magnetic suspension bearing and the control method thereof, the magnetic suspension motor and the fresh air ventilator, the damaged stator winding of the winding to be replaced is replaced through the replacement device, reliable maintenance of the magnetic suspension bearing can be achieved only by reducing the rotating speed of the rotor, normal operation of the structure where the magnetic suspension bearing is located is guaranteed, and the service life of the magnetic suspension bearing is prolonged. The problem that equipment needs to be shut down and a stator winding needs to be manually overhauled and replaced in the prior art is solved, the working efficiency and the overhaul efficiency of the structure where the magnetic suspension bearing is located are effectively improved, the maintenance process and the maintenance difficulty are reduced, emergency treatment on the magnetic suspension bearing is achieved, and the purpose of protecting the magnetic suspension bearing and a magnetic suspension motor is achieved. And the safe operation reliability of the structure of the magnetic suspension bearing is improved.

The present invention relates to the field of the transportation and storage of thermally labile goods such as pharmaceuticals, and to a container system and apparatus employing a total loss evaporation agent such as dry ice. In particular, but not necessarily restricted thereto, the present invention relates to a system for the transportation and temperature controlled storage of ultra-low temperature, low volume, high value goods.

The utility model discloses a foldable bathtub, which comprises a bathtub body, the bathtub body comprises a bathtub bottom, a foldable bottom flexible connecting part, a foldable top flexible connecting part, a foldable top flexible connecting part and a foldable top flexible connecting part, the periphery of the bottom of the basin wall is connected with the bottom flexible connecting part, and the basin wall comprises a front wall surface, a rear wall surface and two side wall surfaces; the folding structure comprises two first folding parts and a second folding part, the two first folding parts are arranged on the two side wall surfaces respectively, the second folding part is transversely arranged in the middle of the front wall surface, and the left end and the right end of the second folding part extend backwards to the two side wall surfaces respectively. The foldable bathtub is simple in structure and convenient to fold, store and carry, and stable supporting of the bottom of the bathtub is guaranteed.

The invention provides a composite material ground terminal phased array antenna housing forming device and method, and relates to the technical field of antenna housing forming. The composite material ground terminal phased array antenna housing forming equipment comprises a drying oven, a plurality of ventilation holes are formed in the drying oven, lifting plates are arranged on the two sides of the inner wall of the drying oven in a sliding mode respectively, frames are arranged on the lifting plates in a sliding mode, and leveling plates are movably arranged in the frames; the thickness of the side walls of the two sides, making contact with the lifting plate, of the frame is larger than that of the other two sides, sliding grooves are formed in the side walls of the two sides, making contact with the lifting plate, of the frame respectively, the bottoms of the plummets are made of magnetic metal materials, and the positions of the magnetic attraction blocks correspond to the positions of the plummets in a one-to-one mode. According to the invention, the leveling plate which can be manually leveled is arranged in the drying oven, so that a worker can level the leveling plate which is in direct contact with the mold, and the mold and a to-be-formed antenna housing can be in a horizontal state, so that the forming quality of the antenna housing is ensured.

The disclosed technology relates to a secondary battery, including: an electrode assembly in which a plurality of unit cells are stacked and an electrode terminal. In one example, respective electrode tabs of the unit cells, which extend from the electrode assembly, are gathered together and electrically connected to an electrode terminal of the secondary battery, and the electrode tab of each unit cell includes an excess length part corresponding to the swelling of the electrode assembly.

The present invention relates to an alarm system based on big data processing of fixed object contact status. The system comprises: a domain imaging mechanism, which is arranged at a dock just above the oil unloading area where the oil tanker's oil unloading operation is performed, and is used to use a wide-area imaging lens to realize the imaging action of the oil unloading area; a photoelectric alarm device, which is used to perform a corresponding photoelectric alarm action when receiving a physical connection instruction obtained based on targeted visual recognition. Through this system, a photoelectric alarm device arranged near the oil unloading area and with a distance to the oil unloading area greater than or equal to a set distance threshold can be introduced, which is used to perform a corresponding photoelectric alarm action when receiving a physical connection instruction obtained based on targeted visual detection, otherwise, the execution of the corresponding photoelectric alarm action is terminated, thereby performing a photoelectric alarm on a battery vehicle entering the oil unloading area when the oil tanker is unloading oil, thereby realizing reliable maintenance of the safe operation of the oil unloading area.

The application discloses a mold vertical warehouse, and relates to the technical field of storage equipment, which comprises a sand blasting device, an oil spraying device, a mold rack and a main control cabinet. The sand blasting device is used for spraying sand on the mold when the mold is stored in the warehouse, so that the surface treatment of the mold is realized. The oil spraying device is used for spraying rust-proof oil on the mold when the mold is stored in the warehouse, so that the maintenance of the mold is realized. The mold rack is provided with a plurality of storage stations for storing the mold, so that the storage of the mold is realized. The mold vertical warehouse further comprises a walking track extending to the sand blasting device, the oil spraying device and the mold rack, and a carrying robot slidably arranged on the walking track. The carrying robot can take and place the mold and drive the mold to move between the sand blasting device, the oil spraying device and the mold rack. The mold vertical warehouse disclosed by the application can realize the automatic storage and withdrawal of the mold. Before the mold is stored in the warehouse, the mold can be automatically cleaned, polished, maintained and lubricated, so that the reliable storage and maintenance of the mold are realized.

The utility model discloses a cut big and medium -sized casting with wet dust removal device belongs to dust purification field. Including frame main part, antechamber drive double speed reducer, fire -retardant fire -resistant cloth, explosion -proof lighting warning light, walking track and supporting parts, controlling means, dust fog filter, off -wind machine, flue gas exhaust pipe. The water in equipment water tank is promoted to form circulating water curtain with the negative pressure of off -wind machine. The air containing smoke dust is first impacted with water curtain under the action of certain airflow organization, and part of the viscosity material in it is intercepted in water. Then pass through water screen and enter the air -water channel, and the water in the channel produces strong stirring and mixes, and the particulate matter is completely cleaned to water. After a part of water follows airflow organization and enters the gas collecting box, air -water separates, and the treated gas passes through the water baffle and is discharged to the atmosphere through the off -wind machine, and the separated water flows into the overflow tank after gathering in the gas collecting box, and overflows from the overflow tank to the water flooding board to form a water curtain, and the cycle is repeated, and the smoke dust is removed.

The utility model discloses a battery box structure and battery package, battery box structure includes: box, protection cover and antenna board, and the box is equipped with assembly opening, protection cover is equipped with the rim buckle connection of assembly opening with the box, and the cover encapsulation assembly opening, and the material of protection cover is plastic, and the antenna board is connected with protection cover. First, protection cover adopts plastic material, avoids the shielding and interference of metal to antenna board signal, and has promoted the signal quality and communication stability of system. Secondly, protection cover buckle connection with the box makes the sealing property of assembly opening improve greatly, prevents dust and water vapor and other external factors from entering the box effectively, thereby has strengthened the security and service life of battery box internal element. In addition, the buckle type connection mode is convenient for the dismounting of protection cover and antenna board, provides great convenience for the subsequent maintenance, overhaul and antenna board replacement, and has improved the maintainability of product.

The present invention belongs to the technical field of natural language processing, and discloses a method and system for joint extraction of entity relations based on data discovery of multi-granularity mixed attention, including: marking the positions of entities and relations in the form of a table space, sending text into a pre-trained model Bert, and obtaining semantic information of the text; obtaining local feature information in the semantic information through a CNN module; obtaining global and local attention information through a multi-head attention module; obtaining entity feature information through a gating unit; obtaining entity attention information fused with entity features by using a multi-head attention module; obtaining entity-relation joint feature information through a gating unit, and inputting it into a dual affine model to complete the joint extraction of entities and relations. The present invention better integrates context information to handle ambiguity, more accurately identifies entities and relations, and improves the accuracy of joint extraction.

The invention discloses a polishing device for bearing production. Comprising a base, a shaft frame, a driven rotating rod and a bearing ring, and a polishing assembly is arranged above the bearing ring. Sliding rods are inserted into the four corners of a lifting plate in the grinding assembly, driving frames at the bottom ends of the sliding rods are hinged to driving wheels to abut against the bearing rings, an adjusting assembly for adjusting the angle of a grinding roller and a combined transmission assembly for controlling the driving wheels and the grinding roller to rotate synchronously are arranged on a top mounting plate, and springs are sleeved on the sliding rods. When the device works, the air cylinder controls the lifting plate to descend, the spring conducts self-adaptive adjustment so that the driving wheel can be matched with bearing rings of different diameters, and the angle of the grinding roller can be adjusted to be matched with various specifications. According to the device, the adaptability to bearing rings with different diameters is improved, the polishing stability and precision are guaranteed, operation is convenient and fast, and efficient and high-quality production of bearings is facilitated.

The invention relates to the technical field of laser, and provides a magnetofluid circulation cooling module and method for an all-solid-state laser, the magnetofluid circulation cooling module comprises a circulation frame, a magnetofluid and a magnetic force source, the magnetofluid is arranged in the circulation frame, one side face of the circulation frame is provided with the magnetic force source, and the other side face is tightly attached to a laser crystal; the circulation frame is divided into an inflow area, a confluence area and an outflow area from left to right, so that the magnetic fluid forms a circulation loop; the magnetic force source comprises an inflow electromagnet, a confluence electromagnet and an outflow electromagnet, and formed magnetic lines have magnetic force gradients so as to achieve a circulation loop of the magnetic fluid. According to the invention, the magnetic fluid is adopted as the cooling fluid, and the flow path of the magnetic fluid is accurately controlled through the accurate magnetic force source, so that the distribution path of the magnetic fluid is consistent with the internal temperature distribution of the laser crystal, and the optimization of the energy consumption of the device is ensured while the insufficient cooling of the center of the laser crystal is avoided.

The invention relates to a noise reduction method and device for crack acoustic emission signals, equipment and a medium. Comprising the steps that crack time-frequency domain signals corresponding to crack acoustic emission signals of a target tower drum are obtained, frequency components in the crack time-frequency domain signals are divided into multiple frequency bands, overlapping intervals exist between the adjacent frequency bands, and time components in the crack time-frequency domain signals are divided into multiple noise estimation time periods; determining a total amplitude value corresponding to any frequency band in the frequency components; based on the total amplitude value, determining an effective signal ratio of any frequency band in a noise reduction time period in the corresponding noise estimation time period; determining a target effective signal ratio of the overlapping interval in the corresponding noise reduction time period based on a first effective signal ratio of the current frequency band in the corresponding noise reduction time period and a second effective signal ratio of the next frequency band in the corresponding noise reduction time period; and the original amplitude value of any frequency at the corresponding moment is correspondingly multiplied by the effective signal ratio to obtain the denoised time-frequency signal, so that the denoising effect is improved.

The invention discloses a design of a touch screen energy storage system topology, and relates to the technical field of energy storage systems, and the design comprises the following steps: selecting a touch screen which is provided with an Ethernet port and uses an Ethernet communication mode, and the touch screen is not limited to data interaction with energy storage system equipment by adopting a Modbus communication protocol; by adopting the energy storage system with the screen, the cost of learning the cloud platform by operation and maintenance personnel is reduced, the maintenance is more stable and reliable in an industrial control environment with poor signal quality, a multi-cabinet single-screen scheme is adopted, hardware products are defined from the software perspective, the cost is effectively controlled, the equipment failure rate is reduced, and the maintenance efficiency is improved. By utilizing a touch screen and software protocol adaptation mode, the human-computer interaction adaptation requirements of various touch screens can be realized only by developing a set of software, the labor cost and the software maintenance cost are reduced, and the topological design of the whole equipment is not influenced by increasing and reducing multiple controllers through the integration and adaptation of the software to communication.

The utility model discloses a feeding structure of a rod mill, which comprises a material receiving part and a feeding part detachably connected below the material receiving part, and the material receiving part comprises a material receiving pipe; the feeding part comprises a transition pipe connected with the lower end of the material receiving pipe, one side of the transition pipe is in through connection with a feeding pipe which is obliquely arranged downwards, and the outlet end of the feeding pipe extends into the rod mill; the lower portion of the inlet end of the feeding pipe is connected with a buffering part coaxial with the transition pipe, the upper portion of the buffering part is communicated with the transition pipe and the feeding pipe, the lower portion of the buffering part is closed, and a buffering layer is arranged in the buffering part. And a flushing pipe communicated with the transition pipe is arranged on the opposite side of the feeding pipe. The wear-resistant buffer type feeding structure of the flushing pipe realizes the function of continuously and smoothly conveying materials for a long time; by changing the structure of the feeding casting elbow and arranging the buffer layer and the flushing pipe, smooth conveying of materials is guaranteed, and meanwhile the abrasion-resistant degree of the feeding structure is increased.

The utility model discloses a modular angle self -adaptation PE perforated pipe belongs to perforated pipe technical field, including perforated pipe, the lower extreme of perforated pipe is connected with the bellows of screw thread, the perforated pipe includes the perforated pipe body, the upper fixed joint of perforated pipe body has the outer sleeve, the lower fixed joint of perforated pipe body has the inner sleeve, the inside surface of outer sleeve is equipped with positive thread no.