168results about How to "Clear function" patented technology

The invention relates to the field of high-voltage direct-current power transmission, and aims to provide an MMC converter valve and method for realizing alternating-current and direct-current fault ride-through based on an energy consumption sub-module. On the basis of a topological structure of a conventional MMC converter valve, M energy consumption sub-modules which are sequentially connected in series and are the same in structure are arranged between a bridge arm inductor of each bridge arm and the midpoint of an upper bridge arm and the midpoint of a lower bridge arm, and each energy consumption sub-module comprises a main through-flow branch, an energy consumption branch and a bypass loop which are connected in parallel; in the main through-current branch, the half-controlled switching device T1 is reversely connected in parallel with a fly-wheel diode D1 of the half-controlled switching device T1, and then is reversely connected in series with the full-controlled switching device T2 and a reverse fly-wheel diode D2 of the full-controlled switching device T2; the energy consumption branch comprises an energy consumption resistor Rd, and the bypass branch comprises a bypass switch K. According to the invention, alternating current fault ride-through and direct current fault ride-through are integrated into the topology of the MMC converter valve, so that the integration level of the protection scheme is improved; voltage fluctuation during alternating-current fault ride-through can be effectively smoothed, and the stability during alternating-current fault ride-through is improved.

The invention relates to a device and a method for rapidly separating actinide elements through a four-column continuous color layer, belongs to the technical field of actinide element separation, and solves the technical problems of interference, complex process and low precision in actinide element separation. The device comprises a liquid storage tank unit, a color layer separation unit, a waste liquid collector, a product collection unit, a valve and a delivery pump. Liquid in the uppermost liquid storage tank unit flows into the color layer separation unit through a valve and a conveying pump; the liquid flowing out of the color layer separation unit is controlled by a valve to flow into a waste liquid collector or flow into a product collection unit. The method comprises the following steps: preparing a radioactive sample, a water-based washing solution, a water-based leacheate, a water-based desorption solution and a chromatography adsorption column before separation; adsorbing plutonium, uranium, americium and neptunium; washing is performed; leaching is conducted; and desorption: separating out radioactive solutions of plutonium, uranium, americium and neptunium. The method is used for separating and purifying the actinide elements.

The invention discloses a command vehicle rack-mounted power supply management system, and the system comprises a power supply filtering module which carries out the filtering of power supply input, and removes the high-frequency electromagnetic interference possibly carried by a power line; the electromagnetic shielding module is used for shielding electromagnetic radiation inside and outside the system; the grounding management module is used for providing a unified grounding point of the system and ensuring that all electrical connections have the same potential so as to reduce electromagnetic interference generated by the difference of the grounding point; the signal transmission optimization module is used for ensuring that signal transmission channels inside and outside the system are not influenced by electromagnetic interference; the electromagnetic interference suppression module is used for suppressing transient high-frequency interference generated in the system; and the environment monitoring and feedback module is used for monitoring electromagnetic environments inside and outside the rack in real time and automatically adjusting an EMC protection strategy of the system according to monitoring data so as to adapt to different working conditions. The command vehicle can adapt to a complex electromagnetic environment and ensure stable operation of equipment in the command vehicle.

The invention relates to the technical field of data mining, in particular to a method and a system for generating a printed circuit board design drawing. The method comprises the following steps: obtaining customer demands, structuring the customer demands into circuit board design demand data, and then carrying out mode clustering to obtain design demand mode data; acquiring a historical design log, performing circuit board hierarchical design clustering based on the historical design log to obtain historical hierarchical design data, and performing wiring structure topology analysis to form a wiring structure model set; quantifying a wiring demand, obtaining wiring demand data based on demand mode data, and matching the hierarchical wiring structure model set to form a matching model; the layout component is used for carrying out component layout on the matched wiring structure model, generating component layout data and planning the direction of a signal line to form a hierarchical structure model; and performing electromagnetic interference simulation, optimizing the hierarchical structure model based on simulation data to balance heat flow, and finally generating a circuit board design drawing. The design efficiency of the circuit board can be improved.

The invention provides a mine hoist skip damping hook visual detection device which comprises a box body, upper hook plates are arranged on the two sides of the upper portion of the box body, and a sensor can be effectively protected against physical damage by arranging a buffer groove and a damping spring. The buffering and damping disc is matched with the fanning strip and the buffering groove to form a damping system, the buffering groove in the fanning strip provides insertion space for the sensor buffering rod, and the damping effect can be further improved. When vibration occurs, the damping disc and the structure thereof can disperse and absorb vibration energy, so that the sensor is protected from being damaged. The sensor mounting slot provides a stable platform for fixing the sensor, and ensures that the sensor can keep correct detection direction and position even under severe conditions. The combination of the linkage telescopic rod and the telescopic rod sleeve allows the sensor unit to flexibly displace within a certain range to adapt to the position change of the skip bucket hook, so that the sensor position deviation caused by equipment movement is reduced, and the detection precision is improved.

The navigation computer board card comprises an information processing module (1), and the information processing module (1) is respectively connected with an antenna interface module (2), an inertial navigation interface module (3), a DDR module (4), a FLASH storage module (5), an EMMC storage module (6), a serial port updating module (7), a CAN bus updating module (8), a network port updating module (9), a USB downloading module (10), a clock module (11) and a power supply module (12). The information processing module (1) is a JFMQL20S all-programmable fusion chip and comprises four-core processors, and the processors carry out data communication through inter-core interruption and a shared memory. The system can be compatible with large-data-volume storage, and is small in size and low in power consumption; meanwhile, IO expansion interfaces are abundant, peripheral expansion is flexible, and upgrading and maintenance are convenient.

The present invention discloses a lathe-milling composite double tool magazine device and a working method for five-axis CNC machining equipment, belonging to the field of machine tool technology. The present invention can flexibly and fully automatically convert the lathe, milling, grinding, drilling, and measuring functions that may be applied to the five-axis CNC machining equipment; the left and right tool magazines are set up with clear functions; the layout of the two tool magazines fully utilizes the span of the double-column gantry beam, does not affect the machining range, and does not waste the horizontal tool change stroke; the stroke matching of the Z and W axes allows the tool magazine to land and reduce the beam load; the arrangement of the upper and lower tool magazine discs matches the tool change position of the ram milling head, which also maximizes the utilization rate of the Z-axis stroke.

The invention provides a shaft-seal-free pump and a liquid flow dividing and leakage preventing method. The shaft-seal-free pump comprises a pump body, a backflow pipe is arranged on the pump body, an impeller rear opening ring is lengthened or a lengthened sleeve is assembled on the inner side of the rear opening ring, the lengthened sleeve is matched with a pump cover rear end fixing ring to form a tail end gap, and a thread seal or a spiral blade seal is arranged at the tail end gap. And an open hole leading to the suction side or the low-pressure side is formed between the wear ring gap and the tail end gap. Through the static seal at the joint of the flow blocking sleeve and the pump cover, the seal design at the rear opening ring of the impeller and the thread seal or spiral blade seal at the tail end gap formed by matching the lengthening sleeve and the fixing ring at the rear end of the pump cover, liquid leakage is effectively prevented, the working efficiency of the pump is improved, and energy waste is reduced. Through the spiral groove and the liquid backflow system, part of liquid returns to the low-pressure position of the inlet of the pump body through the backflow pipe, recycling of the liquid is achieved, maintaining of pressure balance in the pump is facilitated, and the overall efficiency of the pump is improved.

The utility model provides a crimping module, comprising an opening and closing type driving mechanism which comprises a first driving end and a second driving end, and the first driving end and the second driving end are configured to synchronously drive so as to move towards each other or in opposite directions; the upper crimping assembly and the lower crimping assembly are symmetrically arranged in the vertical direction and are respectively mounted on the first driving end and the second driving end, each of the upper crimping assembly and the lower crimping assembly comprises a fixed part, a floating part and a buffer structure connected with the fixed part and the floating part, a probe is arranged in the fixed part, and the floating part is provided with a through hole for the probe to pass through; when the upper floating part and the lower floating part are in contact with the product to be crimped, compression continues to enable the buffer structure to generate elastic deformation, the floating parts stop moving, and the fixing part continues moving until the upper probe and the lower probe penetrate through the through holes to be in contact with the surface of the product. Through the innovative design of the fixing part, the floating part and the buffer structure, the electronic paper can be pre-flattened before crimping operation, so that the problem of inaccurate crimping alignment caused by bending and warping of the electronic paper is effectively solved.

The invention discloses an integrated iron stick yam seeding machine, and relates to the technical field of yam seeding, the integrated iron stick yam seeding machine comprises an insertion rod assembly, the insertion rod assembly comprises a movable insertion rod frame, the insertion rod frame is fixedly provided with a supporting seat, the supporting seat is fixedly provided with a second arc guide plate, the lower part of the second arc guide plate is slidably connected with a sliding plate, and the sliding plate is fixedly connected with the insertion rod frame. A first arc material guide plate is arranged on the inner diameter of the second arc material guide plate, an arc sliding way used for containing the transverse inserting rod is formed between the first arc material guide plate and the second arc material guide plate, and limiting baffles are arranged at the two ends of the first arc material guide plate. The invention relates to a ditching, fertilizing, soil covering and rod inserting integrated system. Single Chinese yams fall into ditches after being sown through the slotting roller, then the soil covering structure is used for covering soil, and finally, the rods are inserted. The design is simple in structure, clear in function, small in power required by a driving system, capable of reducing energy loss and cost, free of two hands, capable of improving working efficiency and capable of reducing labor loss.

This invention discloses a plug-and-play modular rope-driven robotic arm resistant to stress abrupt changes, comprising a movable arm segment and a drive mechanism. The movable arm segment can be used in two ways: as a single application and as a whole application formed by quick-assembly and disassembly connection of multiple movable arm segments. The movable arm segment is equipped with a rope drive mechanism for controlling the rotation of the movable arm segment, and both ends of the control rope of the rope drive mechanism are equipped with main quick-assembly and disassembly connectors. The drive mechanism includes Bowden lines and drive ropes that can control the extension and retraction states of both ends. One end of the Bowden line is equipped with a telescopic section that can adaptively extend and retract, and the telescopic section is connected to the drive mechanism. Both ends of the drive rope pass through the two Bowden lines and are connected to auxiliary quick-assembly and disassembly connectors, which are quickly assembled and disassembled with the main quick-assembly and disassembled connectors. By adopting this solution, the problem that the existing technology cannot simultaneously achieve the convenience of "plug and play" and the stability of "resistance to stress abrupt changes" can be solved.

The invention discloses insect lysozyme capable of preventing and treating rice virus diseases and application of the insect lysozyme. According to the invention, three pieces of lysozyme (RdLYZI1, RdLYZC1 and RdLYZC2) with remarkable inhibitory activity on various rice viruses are innovatively excavated from the body of a natural transmission vector insect of the viruses, and the amino acid sequences of the lysozyme are shown as SEQ ID NO.13, SEQ ID NO.14 and SEQ ID NO.15. The invention further discloses a preparation method of the lysozyme. Experimental verification shows that the lysozyme RdLYZI1, the lysozyme RdLYZC1 and the lysozyme RdLYZC2 can effectively inhibit replication and accumulation of various rice viruses in plants and vector insects, have a remarkable prevention and treatment effect on related virus diseases and relieve plant growth obstacles caused by the viruses. The invention provides a novel biological prevention and control strategy which is environment-friendly and high in targeting property for green prevention and control of rice virus diseases, and has an important application prospect.

This utility model relates to a portable clothes drying device, including an outer shell assembly, a heating air duct assembly, and an inner cover assembly. The outer shell assembly includes an upper shell main body and a front shell. The inner cover assembly is fixedly disposed within the upper shell main body and divides its internal space into a separate cloth cover storage compartment and a heating air duct assembly receiving compartment. The heating air duct assembly is housed within the heating air duct assembly receiving compartment, and its air outlet opens to the outside of the inner cover assembly. The cloth cover storage compartment is used to store the cloth cover. Through an innovative internal partition design, the core functional unit of the clothes dryer (heating air duct assembly) and the essential accessory (cloth cover) are integrated into a compact shell, solving the problem of the cloth cover being separate from the main unit in traditional portable clothes dryers, which is easily forgotten or lost, greatly improving the product's portability and user convenience.

This invention pertains to compositions of polymeric compounds, specifically a recycled rubber powder modified asphalt based on a renewable composite activator, its preparation method, and its application. The recycled rubber powder modified asphalt comprises a base asphalt and activated rubber powder in a mass ratio of 1:(0.2~0.3). The activated rubber powder comprises waste tire rubber powder and a composite activator in a mass ratio of 10:(0.8~1.5). The composite activator comprises an organic phase and an inorganic phase in a mass ratio of (1.5~3):1. The organic phase is a chitosan-amino acid derivative, and the inorganic phase is a layered bimetallic hydroxide. Compared with existing technologies, the rubber powder modified asphalt prepared by this invention exhibits good high-temperature storage stability and interfacial structural integrity, demonstrating excellent anti-aging properties and high-temperature rutting resistance during long-term service.

The invention relates to moxa-moxibustion containing effective substances of fresh ginger and an extraction process of the moxa-moxibustion. The moxibustion disclosed by the invention consists of ginger slices, a rubber ring, a transparent base, a paper tube, a metal sheet and a moxa cake, wherein the ginger slices are prepared by compounding supercritical extraction ginger effective substances and double-layer non-woven fabrics. The extraction process of the effective substances of the fresh ginger comprises the steps of raw material preparation, extraction and separation of ginger essential oil, treatment of fresh ginger residues, extraction of gingerol, microwave-ultrasonic assisted extraction, concentration extraction, supercritical CO2 further purification and the like. The invention further relates to preparation and application of the eutectic reagent. The ginger slice compound disclosed by the invention is prepared through the operations of effective substance treatment, coating, compound molding, drying and curing, cutting and packaging and the like. The advanced extraction technology and the material compounding technology are applied to the moxibustion product, a new thought and method are provided for innovation of the moxibustion technology, the limitation of traditional ginger-separated moxibustion on materials and technologies is broken through, and the components, the structure and the performance of the moxibustion product are remarkably improved.

A verification platform for a SPI interface storage unit controller based on UVM is divided into different verification stimuli according to single-line, four-line and eight-line modes and different AHB, AXI buses and command and XIP access modes, which can realize the calling of different working modes and the use of mixed modes; when the SPI interface storage unit controller has a design update, faster and better transplantation and reuse can also be realized. The present invention adopts independently encapsulated amba axi write channel proxy module, amba axi read channel proxy module and amba ahb proxy module, so that it can be widely used in other module verification platforms with such protocols, reduce debugging workload, save development cycle, and also can flexibly and conveniently realize the replacement of the current verification platform bus interface.

The invention discloses an oil field mechanical arm grabbing 3D visual guidance system based on deep learning. The system comprises an oil field mechanical arm loaded with a motion control system, and a data acquisition module, a data processing module, an initialization calibration module, a target detection module and a grabbing detection module which are in communication connection with the oil field mechanical arm. In oil field operation, when the system initially operates or moves, the initialization calibration module obtains parameter initialization. The data processing module calculates collected images in real time, after it is ensured that the drill rod is static, the images and point cloud data are transmitted to the target detection module to determine the position of an object and then serve as an initial posture estimation result to be transmitted to the grabbing detection module, and finally the result is transmitted to the mechanical arm motion control system for grabbing operation. In conclusion, efficient, intelligent and accurate recognition and grabbing of the drill rod are achieved, new possibility is provided for application of the oil field mechanical arm in complex tasks, and far-reaching influences are generated on oil field automation and intelligent production.

The invention provides a method and a device for generating a telemetry data acquisition and transmission protocol of the Internet of Things. The obtained protocol adopts a data identifier-data value form; the length of the data identifier is 6-7 characters, and the data identifier is composed of five data type characters, one operator and one operation result character; data values are 8 hexadecimal characters in length, most of common data are identified by 32-bit signed floating-point numbers, and a small part of special data are specially defined. According to the protocol generated by the invention, the data transmission structure can be more simplified, the data packet can be more compact, the functions of the telemetering station and the central station can be clearer and more reasonable, the transmission efficiency can be improved, when a new type of data is added, only new identifiers and value pairs need to be added, the expansion and maintenance of the protocol are simplified, and in addition, the data transmission efficiency is improved. Each piece of data can be subjected to four bidirectional operations of adding, deleting, modifying and checking between the telemetering station and the central station, so that the interoperability of the central station and the telemetering station is greatly improved.

The present invention discloses a fire-resistant cable-stayed structure and a manufacturing method thereof, comprising the following structure: a combined structure of steel wire bundle + wrapping tape + (high polyethylene sheath) + fire-resistant heat insulation layer (waterproof coating coated on the outer surface) + hot-melt wrapping tape + (fiber cloth high polyethylene sheath); that is, the inner layer is steel wire bundle + wrapping tape + (high polyethylene sheath), the middle layer is fire-resistant heat insulation layer + (waterproof coating), and the outer layer is hot-melt wrapping tape + (fiber cloth high polyethylene sheath). The present invention achieves the purposes of waterproofing, weather resistance, flame retardancy and fire-resistant heat insulation through the cable structure.

This utility model discloses a metallurgical material crusher, relating to the technical field of crushers. The crusher includes a housing; a pair of crushing rollers, both rotatably mounted inside the housing for crushing materials; a pair of annular components, rotatably mounted on the two side walls inside the housing; and a pair of conveying shovels, fixedly mounted between the pair of annular components. By setting rotatable annular components on both sides of the housing and fixing conveying shovels between them, and cooperating with a drive mechanism to drive the annular components to rotate, the material that has been crushed once at the bottom of the housing can be continuously scooped up and re-conveyed between the pair of crushing rollers for further crushing. This design fundamentally solves the key problem of "uneven material particle size and inconsistent powder specifications" caused by the "traditional crushers can only crush once" in the background technology, ensuring the consistency of the particle size of the final crushed product and greatly improving the processing quality of powder metallurgy raw materials.

The invention discloses an environment-friendly high-performance titanium alloy polishing composition as well as a preparation method and application thereof, and relates to the technical field of metal material surface treatment. According to the environment-friendly high-performance titanium alloy polishing composition, the pH value of a basic system is adjusted to 9.5-10.0 through a pH adjusting agent; the base system comprises the following components in percentage by mass: 10-30% of silica sol, 3-4% of an anti-gel stabilizer (urea or methylurea), 2-3% of a heat transfer improvement and surface defect inhibitor (ethylene glycol or propylene glycol), 0.1-0.2% of a wetting leveling agent, 1-2% of an alcohol amine complexing agent and 0.5-1% of an aminopolycarboxylic acid chelating agent besides water. According to the environment-friendly high-performance titanium alloy polishing composition, on the premise that an oxidizing agent is completely abandoned, perfect balance of high stability, high polishing rate and excellent surface quality is achieved through unique formula design, and the environment-friendly high-performance titanium alloy polishing composition has the advantages of being environmentally friendly and high in safety.

The invention belongs to the technical field of solid waste recycling. The invention discloses a method for realizing high-value recycling of secondary aluminum ash and synchronous deep defluorination and dechlorination by utilizing hydrothermal synthesis. The method comprises the following steps: firstly, pretreating secondary aluminum ash, then preparing the pretreated secondary aluminum ash and water into slurry, and adding a specific defluorinating agent and a dechlorinating agent into the slurry to construct a synchronous reaction system; the system is subjected to hydrothermal reaction under high-temperature and high-pressure conditions, so that fluorine and chlorine elements are respectively fixed and converted into stable compounds. Solid-liquid separation is carried out after the reaction is completed, an obtained solid product can be used as a raw material for preparing a zeolite molecular sieve or an aluminum-based material, and salt is recovered from a liquid part through evaporative crystallization. According to the method, deep removal of harmful elements and a high-value recycling process of beneficial components are coupled to a single hydrothermal system, and efficient harmless and high-value recycling utilization of the secondary aluminum ash is achieved.

The utility model discloses an under-forest multifunctional movable poultry breeding device, including the henhouse, and the henhouse includes the egg production area, the habitat area, the feeding area and the movable cage, and the henhouse bottom is provided with the bottom plate, and the bottom plate lower surface is provided with a plurality of moving wheels, and the bottom plate top is provided with the mesh, and the mesh and the bottom plate between sliding insertion have the excrement receiving tray, and the habitat area is provided with a plurality of habitat racks, and the habitat area top is provided with the supporting plate, and the supporting plate upper surface is provided with a plurality of egg production nests, and the mesh upper surface of feeding area is provided with the trough and the water tank respectively, and the feeding area one end surface is provided with the sliding door. The utility model discloses through setting up the pull rod and the moving wheel, can realize flexible movement, avoid poultry long -term concentration in the same area activity, can replace the site in time, protect under-forest vegetation and soil structure, maintain the ecological balance, set up the excrement receiving tray, and the excrement receiving tray lets the staff can daily unified collection excrement, avoid excrement pollution breeding environment, and the cleaning process need not frequently enter the henhouse, and the time and energy are saved.

Provided is a tape cutter that is easy to understand the functions of the operating parts and the operating direction, and can be easily operated by any user and is easy to use. The tape cutter comprises: a shell body (12) having a winding body storage portion (13) and an opening (11); a feeding mechanism portion (15) that unwinds the tape (T1) according to the operation input of a feeding operation component (52) supported by the shell body (12); and a cutting mechanism portion (16) that cuts the tape (T1) according to the operation input of a cutting operation component (61) supported by the shell body (12). As input, the front end side portion (T1a) of the tape (T1) is cut off, the shell body (12) has a tape delivery cylinder (14), the tape delivery cylinder (14) forms a tape delivery passage (14a) to the opening (11), the cutting operation component (61) is configured to be able to emerge from the outer wall portion of one side of the tape (T1) in the tape delivery cylinder (14) to the outside of the one side, and the delivery operation component (52) is configured to be able to move along the outer wall portion of the other side of the tape delivery cylinder (14).

The embodiment of the invention provides a mode memory enhanced dynamic graph convolution traffic flow prediction method and related equipment, and belongs to the field of intelligent traffic and spatio-temporal data prediction. According to the method, a two-state driven dynamic graph generation mechanism is constructed, and the method comprises the following steps: extracting dynamic mode embedding of traffic data through a mode memory network to capture unsteady disturbance characteristics; time period embedding is extracted through an independent period embedding unit so as to encode a steady state rule; and fusing the two to generate a dynamic graph structure at each moment. According to the method, a dynamic graph generation module is further integrated at a decoding end of an encoder-decoder architecture, so that an adaptive dynamic graph can be regenerated according to time information of a target moment when each future moment is predicted, and graph structure dynamic evolution of a whole training and prediction process is realized. According to the invention, the traffic flow prediction precision, especially the accuracy of long-term prediction, is effectively improved, and the generalization ability of the model to unexperienced scenes is enhanced.

The utility model relates to the technical field of air compressors, in particular to an instrument air compressor and raw material air compressor parallel connection blow-by device. According to the technical scheme, the instrument air compressor and raw material air compressor parallel connection blow-by device comprises a shell, a first connecting pipe, a second connecting pipe and a bottom plate, the first connecting pipe and the second connecting pipe are installed in the shell, and a first branch pipe and a second branch pipe are connected between the first connecting pipe and the second connecting pipe; the first branch pipe and the second branch pipe are provided with a valve and a one-way valve, a bottom plate is arranged on the back face of the shell, a groove is formed in the bottom plate, a cushion plate is installed on the bottom plate, and nanometer micro suction glue is attached to the positions, located on the cushion plate and the bottom plate, in the groove. The utility model solves the problem that the energy consumption is increased due to the opening of the emptying valve of the instrument air compressor, and simultaneously achieves the purposes of improving the raw material air flow and stabilizing the operation condition of the air separation device.

The utility model relates to bridge cable protection structure field discloses a kind of fire-resistant protective structure of bridge cable system, including heat insulation layer, fire-retardant sealing layer and protective layer sequentially arranged from inside to outside, and high-temperature-resistant adhesive glue is equipped between the heat insulation layer with the bridge cable. The heat insulation layer is excellent in thermal stability, and excellent in heat insulation effect;The fire-retardant sealing layer is formed by basalt fiber cloth or high-silica cloth and fire-retardant sealant, and the thickness of fire-retardant sealing layer is 3-6mm, and it is good in high-temperature resistance, fire resistance, vibration resistance and sealing property, and stable in structure;The high-temperature-resistant adhesive glue has excellent temperature resistance, adhesion, moisture resistance and vibration resistance. The protective layer uses silicone high-temperature paint, to further enhance the durability of protective structure. The fire-resistant protective structure of the bridge cable system has clear function, stable performance, easy construction, excellent heat insulation, fireproof and durable performance, and obvious comprehensive advantages.

The embodiment of the invention provides a page processing method, device and system for a form, electronic equipment and a storage medium, and the method comprises the steps: obtaining a development demand of the form, then dividing the development demand to obtain a plurality of sub-form demands, then obtaining sub-form components corresponding to the sub-form demands, and obtaining a main form page, and finally, integrating the main form page and the sub-form component to obtain the page of the form. By dividing development requirements, obtaining multiple sub-form requirements and splitting a form into the multiple sub-form requirements, modularized development can make a code structure clearer and a sub-form component function clear, and by integrating the sub-form component corresponding to the sub-form requirements and a main form page, a form page is obtained, so that code modularization is realized, and the development efficiency is improved. And the readability and maintainability of the code are improved.

The utility model discloses a novel slurry pump sealing device relates to mechanical seal technical field, including rotating part and stationary part: rotating part is by medium side dynamic ring, shaft sleeve and pump shaft, and medium side dynamic ring is through the pin peg and is equipped with in the outer of shaft sleeve, and shaft sleeve is pressed in the impeller end face through the hug ring, stationary part contains medium side static ring, medium side push ring and atmospheric side gland, and medium side static ring is connected with push ring through the pin peg, and push ring is axially connected with atmospheric side gland through transmission pin, and atmospheric side gland is fixed in the pump cover. The spring is arranged between atmospheric side gland and medium side push ring, and medium side dynamic ring and static ring are pushed and abut tightly and seal. Medium side dynamic ring diameter D1 is less than medium side push ring diameter D4, and greater than medium side static ring diameter D3, forms positive balance - reverse unbalanced structure, and increases the closed force, and atmospheric side seal is established between stationary part and shaft sleeve, and contains atmospheric side dynamic ring seal that rotates with shaft sleeve, atmospheric side static ring seal that is fixed in atmospheric side gland, compact structure, saves the space.

The utility model discloses a kind of tunnel primary support inverted arch arch cutting's scribe positioning tool, belong to tunnel engineering construction technical field.It includes symmetrical V type arrangement's left beveling positioning gauge and right beveling positioning gauge, vertical through and fixed in the middle part of two I-beam centerline alignment rod, bevel gauge connecting reinforcing bar connecting two middle regions, and respectively being located in two ends of span adjustable telescopic arm, telescopic arm is equipped with limit bolt, the V type end of left beveling positioning gauge and right beveling positioning gauge and the other end part is equipped with I-beam main positioning groove and I-beam auxiliary positioning groove respectively.The tool solves the problem of low precision, low efficiency, poor versatility of existing positioning mode, with the advantages of high positioning accuracy, simple operation, strong versatility, stable structure, suitable for cutting scribe positioning of tunnel primary support inverted arch arch.