50results about How to "Avoid risk of sabotage" patented technology

The invention provides an asset data processing method and device based on a derivation chain. The method comprises the following steps of constructing a unique main chain and at least one transaction derivation chain for a block chain asset management system; respectively carrying out block chain verification on the main chain and the transaction derivation chain; respectively updating respective verification pools of the main chain and the transaction derivation chain; and carrying out asset data processing between the main chain and each transaction derivation chain and between the transaction derivation chains through gateway transfer. According to the scheme provided by the invention, the independent and isolated main chain and transaction deviation chains are arranged, so that the crucial function updating can be carried out on the derivation chain with lower impact firstly, and thus the updating speed can be promoted and the destroy risk of the main chain can be avoided, and furthermore, the expandability is remarkably improved and the updating period is short to be convenient to adapt to new demands and adopt an innovative technology.

The invention discloses a method for querying the station approaching information of a bus by a mobile phone. In the method, a data center performs calculation by using real-time data transmitted through a wireless network by vehicle-mounted positioning equipment to obtain distances between each of a plurality of buses closest to the bus stop and the bus stop, the arrival time of each bus and zone information; and when needing to know the information about the stop, a passenger can query the information from the data center in a way of transmitting short messages or surfing the Internet with the mobile phones. Therefore, bus-arrival information can be queried without observation at a specific stop at any place where the mobile phone can be used, which breaks geographical constraints and further expands the application of a bus-arrival information query function.

The invention discloses a method for testing the profile accuracy of a coated surface, comprising the following steps: measuring the coordinate values of the centers of theodolite target balls and thereference holes of a coated surface in a double-theodolite intersection measurement coordinate system; obtaining the spatial coordinate values of the centers of the theodolite target balls in a coated surface reference coordinate system by reference conversion; replacing the double-theodolite target balls with tracker target balls, and measuring the spatial coordinate values of the centers of thetracker target balls in a tracker measurement coordinate system by laser tracking measurement; using a tracker to scan and measure the trajectories and spatial coordinate values of the center pointsof the tracker target balls in the tracker measurement coordinate system by means of spatial scanning measurement; obtaining the coordinate values of the trajectory of the center point of a scanning tracker target ball in the coated surface reference coordinate system by reference conversion; and obtaining the profile accuracy of the measured coated surface according to the normal deviation between the spatial coordinate values of the points on the trajectory of the center point of the scanning tracker target ball in the reference coordinate system and the theoretical model of the coated surface in the reference coordinate system.

The invention provides a variable thickness single fiber pull-out cement-based test piece mould and an adjusting and testing method. The mould comprises a bottom plate, a framework, stand columns, side wing upper and lower modules and partition plates. All the portions are connected through screws and the like. A test piece thickness adjusting method based on the mould is provided, and a specified-thickness single fiber pull-out cement-based test piece can be obtained on the premise that the test piece is not cut. By means of the mould and the method provided by the invention, a plurality of single fiber pull-out cement-based test pieces can be poured at a time, the structure is simple, the operability is high, demoulding is easy, and in addition, the test pieces are spaced through the partition plates and independently formed; and meanwhile, the thicknesses of the poured test pieces can be adjusted by adjusting the positions of the side wing modules, accordingly, a cutting process ina traditional method is omitted, and the risk of damage to a fiber / substrate interface due to cutting is avoided.

The invention relates to the technical field of natural skin care products, especially to a preparation method and application of an aquilaria wood hydrolat. The preparation method comprises the following steps: crushing aquilaria wood so as to obtain aquilaria wood powder; adding deionized water accounting for 5 to 10 times of the mass of the aquilaria wood powder, carrying out stirring so as to obtain a suspension, adding a cosolvent accounting for 0.1 to 0.3% of the suspension, carrying out a flavor component mechanical dissolving experiment in virtue of a flash extractor and subjecting the suspension to centrifugation so as to obtain a supernatant; and allowing the supernatant to pass through a multilayer cross-flow filler rotary flavor improving apparatus, adjusting feeding temperature, internal temperature of a distillation column, primary condensation inlet temperature and secondary condensation inlet temperature and collecting secondary liquid condensate which is the aquilaria wood hydrolat. The aquilaria wood hydrolat prepared in the invention has pure and rich fragrance, high content of effective substances, a stable and transparent state and a good skin care effect and is not prone to precipitation of sediments.

The invention relates to a welding seam positioning device and a welding method using the welding seam positioning device. The welding seam positioning device comprises a ceramic liner, a high-strength flat plate and a suction mechanism; the ceramic liner is fixed at the bottoms of a first plate unit and a second plate unit; the high-strength flat plate is pressed at the tops of the first plate unit and the second plate unit, and the suction mechanism comprises a first magnetic suction cup, a second magnetic suction cup and a handle fixedly connected with the first magnetic suction cup and thesecond magnetic suction cup. The welding method comprises the steps that the high-strength flat plate is pressed at the tops of the first plate unit and the second plate unit, the first plate unit and the second plate unit are sucked and tightly attached to the bottom surface of the high-strength flat plate through the first magnetic suction cup and the second magnetic suction cup of the suctionmechanism, the ceramic liner is fixed at the bottoms of the first plate unit and the second plate unit, and then welding starts to be conducted. By means of the welding seam positioning device and thewelding method, welding seams are continuous, the welding defects are effectively reduced, the risk of damaging base materials of steel plates is avoided, and the automation degree is significantly increased.

The invention provides a display cabinet and a control method thereof. The display cabinet comprises a cabinet body, and a display space is limited in the cabinet body; the display cabinet also comprises a rotatable tray, a first camera and a touchable transparent display screen, wherein the rotatable tray is arranged in the display space and used for containing an exhibit; the first camera is located in the display space and used for shooting pictures of different angles of the exhibit to build a 3D model of the exhibit, and the first camera also comprises a 3D camera; the touchable transparent display screen forms at least one part of the cabinet body, and is used for obtaining touch operation and displaying information of the exhibit according to the touch operation, and the informationcomprises a 3D model. Therefore, the display cabinet can simply and conveniently display the 3D model of the exhibit so that visitors can view and understand the exhibit all around, the 3D camera does not need to be adopted, special modeling software and professional staffs do not need to be modeled, the cost of the 3D model of the exhibit can be reduced, the risk that exhibit is damaged when thestaffs conduct 3D model of the exhibit can also be avoided, and the original morphology of the exhibit is better protected.

The invention belongs to the technical field of well drilling and completing of oil and gas fields, and in particular relates to a radial horizontal well drilling and sand control completing tool andmethod. The tool is characterized by comprising a radial horizontal well drilling auxiliary tubular column, a radial horizontal well drilling tool string and a sand control tool. The radial horizontalwell drilling auxiliary tubular column comprises a depth adjusting tool, a special oil pipe combination, a depth calibrating tool, an orientation measuring auxiliary tool, an axial anchoring tool, anorientation adjusting tool and a drill-in guiding tool connected in series. The radial horizontal well drilling tool string comprises a logging cable, a circular liquid feeding tool, a gravity sealing tool, a peripheral anchoring tool, a power motor, an adapter connector, a flexible drill pipe and a milling and drilling bit tool. A 10-20 m (hard formation) stable drainage channel can be formed between a shaft and an oil layer to replace a conventional perforated hole for deep penetration completion to pass through a near-well pollution zone and penetrate through an invasion zone of an oil well, so that the injection rates of a water injection well, a gas-injection well and a disposing well are improved.

The invention discloses a watch movement winding apparatus. The watch movement winding apparatus is characterized by comprising a rotating apparatus and a movement fixed apparatus, wherein the rotating apparatus comprises a motor and a rotating shaft disc, the rotating shaft disc is connected with a motor by virtue of a transmission part, and the rotating shaft disc is provided with a grabbing apparatus for grabbing a clockwork spring button; the movement fixed apparatus comprises a bottom carrier and a support, the support comprises an upper support and a lower support, the upper support and the lower support are symmetrically distributed in the vertical direction, the upper support comprises a transverse guide rail, a longitudinal guide rail, a fixed movement end and a movable frame, the longitudinal guide rail is arranged on the transverse guide rail, the movable frame is arranged on the longitudinal guide rail, the fixed movement end is fixed on the movable frame, and the fixed movement end can be adjusted along the transverse direction and the longitudinal direction. By providing the fixed apparatus adjustable according to the dimensional size of a movement and realizing an apparatus for automatically winding the movement according to a preset condition, compared with the manual operation, the efficiency is greatly improved, and the damage risk of the nonstandard manual operation for the movement can be avoided.

The invention discloses a cross-linked polyethylene insulated halogen-free low-smoke flame-retardant rat-proof and termite-proof medium-voltage power cable, which comprises a cable core and a flame-retardant wrapping tape, the cable core is embedded in the flame-retardant wrapping tape, and the cable core comprises three conductor wire cores, each conductor wire core comprises a conductor which is sequentially coated with a conductor shielding layer, a cross-linked polyethylene insulating layer, an insulating shielding layer and a metal shielding layer from inside to outside, and a gap between the flame-retardant wrapping tape and the cable core is filled with a filling layer; the conductor shielding layer, the cross-linked polyethylene insulating layer and the insulating shielding layer are formed by co-extruding three layers; the cable adopts a three-layer co-extrusion technology to extrude the conductor shielding layer, the crosslinked polyethylene insulating layer and the insulation shielding layer at one time, so that the adhesive performance among the three layers after cabling is met, and the layering phenomenon does not occur after extrusion; and the conductor shielding layer is not easy to scratch, so that excellent insulation and mechanical properties of the cable are ensured.

The invention discloses a method for sharing an electronic account book. The method comprises a step of reading and writing current account and income and expenditure account of a financial electronicbill into a database, a step of allowing the electronic bill to form a data block, establishing an information chain according to the bill information of a transaction, and recording transaction information to a node of the data block after the transaction of the transaction chaine is completed, a step of carrying out encrypted sign on the data block through a key and a digital signature, a stepof sharing the electronic account in the data block in a local system network, a step of generating one or more transaction side chains, constructing a unique transaction main chain of the system according to the data block information of the transaction side chains, and forming a distributed electronic bill, and a step of carrying out respective data block verification and transaction verification through the transaction side chains and the transaction main chain, wherein the transaction actually exists if the transaction verification on the transaction side chains and the transaction main chain is passed, otherwise, the transaction does not exist. The invention provides the method for sharing the electronic account book, and the blockchain technology is used.

The invention provides a novel liquid immersion cooling device which comprises an upper liquid storage bin, a lower liquid storage bin, a fin plate, a water inlet, a water outlet, TEC refrigerating chips, partitions and fins, wherein the upper liquid storage bin is connected with the lower liquid storage bin and separated from the lower liquid storage bin through the fin plate; the TEC refrigerating chips are fixed on the upper surface of the fin plate; the cold surfaces of the TEC refrigerating chips are in contact with the fin plate; a partition is inserted between every two adjacent TEC refrigerating chips; the fins are uniformly arranged on the lower surface of the fin plate; the water inlet is formed in the side wall of the upper liquid storage bin; the water outlet is formed in the side wall of the upper liquid storage bin. The novel liquid immersion cooling device has the advantages and benefits that due to the adoption of the TEC refrigerating chips, the problems of difficult temperature adjustment, difficult maintenance and damage of flowing of cooling liquid on the chips in the conventional liquid immersion cooling system are solved; a proper amount of cooling liquid is added and a proper amount of airbags are reserved, so that the liquid overflow caused by thermal expansion and cold contraction of the liquid can be prevented; due to the design of the partitions, the cooling liquid can uniformly flow through the TEC refrigerating chips.

The invention discloses an anti-strong-wind automatic rotary type place name sign based on magnetic force. The place name sign comprises a base body, a base body N pole magnet, a base body S pole magnet, bearings, a rotary shaft, a limiting plate, a frame, a frame S pole magnet, a frame N pole magnet, glass, a phosphor bronze sheet, a piezoelectric crystal plate, a fluorescent lamp and a capacitor. The base body is embedded in the ground, the base body N pole magnet is embedded in one end of the base body, the base body S pole magnet is embedded in the other end of the base body, the bearings are arranged on the upper side and the lower side in the hole in the middle of the base body and internally provided with the rotary shaft, the limiting plate is arranged on the rotary shaft, the frame is arranged on the limiting plate, the frame S pole magnet is embedded in one end of the bottom of the outer side of the frame, the frame N pole magnet is embedded in the other end of the bottom of the outer side of the frame, and the glass is arranged on the front side and the rear side of the frame; a wind tunnel is arranged on the top of the frame and internally provided with a vibration power generation device formed by attaching the phosphor bronze sheet and the piezoelectric crystal plate, and the frame is internally provided with the fluorescent lamp and the capacitor; the frame rotates to the side face to face the air flow under the strong wind, the piezoelectric crystal plate vibrates to generate power, and the frame restores the original site after wind force is reduced.

The invention provides a wind-resistant metal roof structure. The wind-resistant metal roof structure comprises a metal roof panel, an aluminum alloy support and a connecting mechanism; and the connecting mechanism comprises a first sliding sealing gasket, a second sliding sealing gasket, a compression spring, a connecting nut and a connecting bolt matched with the connecting nut. According to the wind-resistant metal roof structure, wind can be buffered to a certain extent, the risk that rigid connection easily causes damage to the metal roof panel and the aluminum alloy support is effectively avoided, and the wind resistance of the metal roof panel is improved. The invention further provides a construction method of the wind-resistant metal roof structure. The construction method comprises the following steps of S1, bottom plate installation; S2, support installation; S3, lining purlin installation; S4, construction of a PE vapor barrier film; S5, construction of the TPO waterproof coiled material; S6, aluminum alloy support installation; and S7, construction of the metal roof panel. According to the wind-resistant metal roof structure, through research and field implementation of the metal roof system construction technology under the FM certification standard, cost waste caused by a traditional construction technology is reduced, the construction period is shortened, and the construction quality is guaranteed.

A process for producing ammonia synthesis gas from a hydrocarbon source, comprising: conversion of the hydrocarbon source into a raw synthesis gas (14) in ATR or POX reactor (11) which is fired with oxygen (12) or oxygen-enriched air (28); a water-gas shift treatment of the raw synthesis gas (14), which consist of a medium-temperature shift (15) at a temperature of 200 €• 300 °C, thus obtaining a shifted synthesis gas (16); purification of said shifted synthesis gas (16) including at least a step of pressure-swing adsorption (17) to remove residual carbon oxides and methane from the synthesis gas, obtaining a purified synthesis gas (18), and optionally, addition of nitrogen (19) to said purified synthesis gas (18), thus obtaining ammonia synthesis gas with a desired hydrogen to nitrogen ratio.

The invention discloses a safety protection type liquid metal oxygen sensor. The structural design, the protection circuit design and the like of a ceramic tube protective cover are utilized, active protection is carried out on the integrity of the weak part-ceramic tube of an oxygen sensor, the fracture condition is monitored in real time, isolation measures are taken in time to deal with safety risks, and safety accidents and the like caused by leakage are avoided from the two aspects of active defense and risk dealing. The ceramic tube protective cover adopts a streamline staggered design so that the impact damage effect of high-speed flowing liquid metal on the ceramic tube is prevented. Under the extreme accident working condition that the ceramic tube is broken, the high-pressure liquid metal enters the ceramic tube part, the protection circuit is switched on, a warning lamp used for leakage accident warning is lightened, meanwhile, an electromagnet starts to work, the protective cover moves under the action of electromagnetic force and isolates the ceramic tube from the external liquid metal, and therefore, the safety risk that high-temperature and high-pressure liquid metal upwells through the broken ceramic tube and is jetted to an external area is prevented.

The invention discloses wide-angle lens, and the lens sequentially comprises a first group G1, an aperture diaphragm STP and a second group G2 from the object plane to the image plane. An imaging plane IMG is provided with a light receiving surface of a solid photographing element. The first group G1 consists of a first lens L1 with the negative focal power, a second lens L2 with the negative focal power, and a third lens L3 with the positive focal power, wherein the first, second and third lenses L1, L2 and L3 are arranged coaxially. The front surfaces of the first and second lenses L1 and L2 are convex surfaces, and the rear surfaces of the first and second lenses L1 and L2 are concave surfaces. The second group G2 consists of a fourth lens L4 with the positive focal power, a fifth lens L5 with the positive focal power, a sixth lens L6 with the negative focal power and a seventh lens L7 with the positive focal power, wherein the fourth, fifth, sixth and seventh lenses L4, L5, L6 and L7 are arranged coaxially. The fifth lens L5 and the sixth lens L6 form a glued lens, and the gluing surface of the glued lens is bent towards the object space. The first group G1 and the second group G2 are connected through a thread connection frame, and are respectively located outside and inside a gate. The distance between two groups is changed through the rotation of a thread.

The invention provides a cable laying method for vertically laying pipelines. The method comprises the following steps: 1. Positioning and construction of laying pipelines; 2, build an operation platform and laying equipment on that upper part of the laying pipeline; 3, laying cables; Step 4: Fixing cables. step 4, fixing a plurality of auxiliary wire rope are fixed on that upper part of a main wire rope, the auxiliary wire rope is used for supporting the main wire rope, and the ends of the auxiliary wire rope are suspend and fixed on both ends of the load-bearing crossbar on the upper part ofthe laying pipe. The utility model has the advantages of relatively safe coal mine power supply, low cost and convenient maintenance. The great innovation of power supply mode is of great significance for popularization. The service life of the cable is prolonged.

The invention discloses an intermittent-type intelligent phototherapy irradiation instrument, and the irradiation instrument is provided with a treatment light source, a main control unit, a light guide fiber, and a spot light cap. One end of the light guide fiber is connected with the treatment light source, and the other end of the light guide fiber is connected with the spot light cap. The main control unit is electrically connected with the treatment light source. The main control unit controls the treatment light source to work in an intermittent mode of working for a period T and then stopping for a period M, wherein T and M are positive integers, wherein T is within the range of 1-3 hours, and M is within the range of 1-3 hours. The treatment light source is a blue light source or a blue-green light source or a green light source. The main control unit is provided with a single-chip microcomputer main control circuit module, a light source detection circuit module, a light source output control module, and a light source drive module. The irradiation instrument can avoid a risk that the chromosome of an irradiated animal is damaged by long-time irradiation, is convenient for a medical worker for operation, and is convenient to use.

The invention discloses an embedded floating underwater in-situ remediation device and a mounting method thereof. The embedded floating underwater in-situ remediation device comprises a floating device, a water diving pipeline, a water purification core, a water suction pump and a stirring device; the stirring device is mounted inside a lower tank body; the stirring device comprises a driving motor, a rotating shaft and stirring supports; the driving motor is mounted on the outer side wall of the lower tank body; the driving motor controls the rotating shaft to rotate; the rotating shaft is mounted inside the lower tank body; the outer side of the rotating shaft is provided with the plurality of stirring supports; the floating device comprises an inner air sac and an outer ring sleeve; theinner air sac is of an annular structure; the outer ring sleeve is of a ring body structure; the inner side of the outer ring sleeve is opened, and an annular cavity is formed inside the outer ring sleeve; and the inner air sac is mounted inside the annular cavity of the outer ring sleeve. The inner air sac disclosed by the invention can be protected by the outer ring sleeve, so that the risk that the air sac is damaged is avoided, and meanwhile, the water purification efficiency is greatly increased.

The invention discloses a preparation process suitable for a superconducting detector glass window, which is characterized by comprising the following steps of cutting a chip boundary cutting groove Ion one side of the glass window of a glass window wafer, and completely etching silicon or silicon nitride and a cut-off layer in the chip boundary cutting groove I, bonding one side of a glass window of the glass window wafer with the bearing wafer, etching a glass window on one side of the silicon layer of the bonded wafer, and etching a chip boundary cutting groove II at a position corresponding to the chip boundary cutting groove I to expose the cut-off layer, cleaning the residual photoresist by adopting oxygen plasma, separating the glass window wafer and the bearing wafer by using an organic solvent, and separating the glass window-containing chip from the glass window wafer. By adopting the preparation scheme of the superconducting detector glass window suitable for universe microwave background radiation detection provided by the invention, the success rate of preparing the glass window containing the detector pattern can be improved to 100%, and the success rate of separating the chip containing the glass window from the glass window wafer also reaches 100%.

The invention provides a cable laying method for vertically laying pipelines. The method comprises the following steps: 1. Positioning and construction of laying pipelines; 2, build an operation platform and laying equipment on that upper part of the laying pipeline; 3, laying cables; Step 4: Fixing cables. step 4, fixing a plurality of auxiliary wire rope are fixed on that upper part of a main wire rope, the auxiliary wire rope is used for supporting the main wire rope, and the ends of the auxiliary wire rope are suspend and fixed on both ends of the load-bearing crossbar on the upper part ofthe laying pipe. The utility model has the advantages of relatively safe coal mine power supply, low cost and convenient maintenance. The great innovation of power supply mode is of great significance for popularization. The service life of the cable is prolonged.

The invention discloses a method for arranging a vibration suppression device of a variable-pitch marine riser, which comprises the steps of: firstly, according to the actual sea conditions and the inherent characteristics of the riser, the vortex-induced vibration fatigue analysis is carried out on the riser, and according to the analysis result, it is determined whether the installation is necessary Suppression device for vortex-induced vibration; in the second step, according to the vortex-induced vibration fatigue damage risk level, vibration amplitude and drag force load of the riser, the riser is divided into high-risk section of fatigue damage, low-risk section, no-risk section and transition Section, and then adopt different preset installation methods to arrange the vibration suppression device, and finally complete the arrangement of the vibration suppression device. The invention divides the axial area of ​​the standpipe into a high-risk section of fatigue damage, a low-risk section, a no-risk section and a transition section, and adopts different spacings to arrange vibration suppression devices in different fatigue damage areas. This arrangement method can ensure the suppression effect of the vibration suppression device on the vortex-induced vibration, and greatly reduce the drag force load on the standpipe.

The invention discloses a bending-resistant shearer cable, which comprises three power cable cores, a ground wire core, a control wire core and a filling layer; the three power cable cores, the ground wire core and the control wire core are arranged in the filling layer; The outer cover of the filling layer is provided with a CPP tightening tape layer; the outside of the CPP tightening tape layer is successively provided with an oxygen barrier layer, a heat insulation layer, a steel belt layer, a non-magnetic barbed steel wire rodent-proof layer and an outer protective layer; The power cable core includes five types of tinned copper conductor bundles, bundled conductor strands are twisted in the same direction, and the five types of tinned copper conductors are sequentially provided with an isolation tape layer, EPDM rubber insulation layer and semi-conductive shielding Floor. The invention is favorable for popularization and application.

The invention belongs to the technical field of oil and gas field drilling and completion, and in particular relates to a radial horizontal drilling and sand control completion tool and method, wherein the tool is characterized in that it includes a radial horizontal drilling auxiliary string, a radial horizontal drilling tool string and a sand control tool , radial and horizontal drilling auxiliary strings include depth adjustment tools, special tubing assemblies, depth calibration tools, azimuth determination auxiliary tools, axial anchoring tools, azimuth adjustment tools and drilling steering tools, and radial horizontal drilling tool strings Including interconnected logging cables, circulating liquid inlet tools, gravity sealing tools, circumferential anchoring tools, power motors, variable buckle joints, flexible drill pipes and milling bit tools. The invention can establish a 10-20m (hard formation) stable drainage channel between the wellbore and the oil layer, replace the conventional perforation for deep penetration completion, cross the near-well pollution zone, penetrate the oil well invasion zone, and improve water injection wells, Injection rate of gas injection well and treatment well.

The invention provides a prevention, treatment, rehabilitation and health care instrument and prevention, treatment, rehabilitation and health care method for the COVID-19 pneumonia. The prevention, treatment, rehabilitation and health-care instrument comprises a temperature adjusting, purifying, atomizing and breathing unit; the temperature adjusting, purifying, atomizing and breathing unit comprises a temperature adjusting and purifying system for performing temperature adjustment and purification on a medicinal preparation with a specific function and inhaled air, an atomizing system for performing atomizing dispersion on the medicinal preparation and a breathing system for absorbing and utilizing medicinal preparation aerial fog. The prevention, treatment, rehabilitation and health care method includes the steps of preparation feeding, temperature adjustment and atomization, aerial fog breathing and shutdown for cleaning. According to the instrument, temperature adjustment and efficient atomization are carried out on the medicinal preparation with the specific function, purification and temperature adjustment are carried out on air inhaled under negative pressure, and the medicinal preparation aerial fog with specific temperature and humidity is breathed into a respiratory system, to perform prevention, treatment, rehabilitation and health care on respiratory system diseases such as the COVID-19 pneumonia, thereby preventing disease transmission, so that body health is protected.

The invention discloses an automatic flushing, overflowing and filtering device. The automatic flushing, overflow and filtering device is of a box structure and internally comprises an automatic flushing area, an automatic overflow area, an automatic filtering area and the like, wherein the automatic flushing area is provided with an elbow directly connected with a water inlet and capable of being adjusted to turn so as to directly flush sediments in a water inlet area by pressurized inlet water, the automatic overflow area is adjacent to the water inlet area, the automatic overflow area and the water inlet area are separated by a height-adjustable overflow plate, the height of the overflow plate is adjusted according to the water inlet amount so as to discharge sediments flushed by the water inlet area along with overflow water, the automatic filtering area is also adjacent to the water inlet area, the automatic filtering area and the water inlet area are separated by a replaceable-mesh filter screen, and the mesh number of the filter screen is reasonably selected according to the national standard of environmental protection, so that water flowing into the filtering area from the water inlet area is filtered. The device of the invention is applied to a pretreatment end of an on-line water quality monitoring instrument, and can well realize automatic cleaning and overflowing of the device and filtration of monitoring water.

The invention discloses a foundation pit dewatering well construction system, and belongs to the technical field of building construction. The foundation pit dewatering well construction system comprises a foundation pit, a first non-drainage well pipe, a second non-drainage well pipe and a plurality of drainage well pipes. The first non-drainage well pipe is arranged at the bottom of the foundation pit, and a first thread is arranged on the outer wall of the top of the first non-drainage well pipe; second threads and third threads are correspondingly arranged on the top outer walls and the bottom inner walls of the multiple drainage well pipes, and the multiple drainage well pipes are in threaded connection through the second threads and the third threads; and a protection structure in threaded connection with fourth threads is arranged at the top end of the second non-drainage well pipe, and a top beam is arranged at the top end of the foundation pit and used for supporting the protection structure. According to the foundation pit dewatering well construction system, the construction efficiency is greatly improved, the detached drainage well pipes cannot be damaged and can be recycled, and the construction cost of cutting off and welding is reduced.