281results about How to "Reduce flow" patented technology

The utility model relates to a battery monomer, a battery and a power utilization device, and belongs to the technical field of batteries. The battery monomer comprises a shell, an electrode terminal and a pressure relief mechanism, the shell is provided with a first wall, the outer surface of the first wall comprises a first area and a second area, and the contact angle between the first area and electrolyte is larger than the contact angle between the second area and the electrolyte; at least one of the electrode terminal and the pressure relief mechanism is disposed in the first region. The first area and the second area with different contact angles are arranged on the first wall, so that the flow characteristics of the electrolyte on the first wall are different, and the electrode terminal and / or the pressure relief mechanism which are / is easy to corrode and difficult to clean are / is arranged in the first area, so that the electrolyte is more difficult to enrich in the first area; the electrolyte on the first wall can be effectively prevented from flowing to the position where the electrode terminal and / or the pressure relief mechanism is located, and important parts on the first area are effectively protected.

According to the method, bacillus licheniformis bacterial liquid and calcium ion liquid are sequentially, slowly and evenly sprayed on the surface of a soil body, soil particles on the surface of a slope are cemented, a layer of calcium carbonate protection film is formed on the surface of the soil body, the anti-scouring capacity of the soil body can be effectively improved, flowing of the soil particles is reduced, and plant growth is protected; the adopted bacillus licheniformis can also increase the number of effective microbial communities in soil, improve the root system environment, promote plant growth, inhibit reproduction of harmful microorganisms, improve the granular structure of the soil, improve the soil, regulate the pH value of the soil, improve the water storage, energy storage and heat preservation of the soil, improve the disease resistance of crops and promote the maturity of plants; after vegetation grows, the effect of water and soil conservation can be improved, generated calcium carbonate can also bond soil particles, water and soil loss is reduced, bacillus licheniformis plays a dual role, multiple utilization of resources is achieved, and wide application prospects are achieved.

The invention discloses coating and shaping equipment for a high-breathability PTFE (Polytetrafluoroethylene) waterproof breathable film, which comprises a rack, a base cloth supply device arranged on the rack, a coating device arranged on the rack and used for coating a liquid raw material on the base cloth, a first coagulating basin arranged on the rack and below the coating device, and a cloth in-pool guide device arranged on the rack and at the outlet of the coating device, the cloth in-pool guiding device comprises a plurality of height-adjustable material guiding frames arranged on the machine frame side by side and a water inlet roller guiding mechanism, input material guiding rollers are arranged on the material guiding frames, a plurality of cloth tensioning transition rollers are arranged in the first coagulating tank in the feeding direction, and the connecting line of all the cloth tensioning transition rollers is in a downwards-protruding arc shape. A water outlet guide roller is arranged at one end, far away from the water inlet roller, of the first coagulating tank; a plurality of heaters and a plurality of temperature sensors are arranged in the first coagulating tank; a tension control device for controlling the tension force of the cloth is arranged on the rack, and a traction pressing vehicle for sending out the cloth is arranged on the discharging side of the tension control device on the rack.

The invention discloses an anodic oxidation production wastewater treatment system, which relates to the field of sewage treatment. The anodic oxidation production wastewater treatment system comprises a sedimentation tank, wherein a booster assembly and a roller are arranged in the sedimentation tank, and a medicine adding bucket, a grid plate and an aeration pipe are also arranged in the sedimentation tank. A multi-level grid plate is arranged in the sedimentation tank to slow down the flow of sewage, and the sewage is aerated in combination with the aeration pipe to help accelerate the coagulation and precipitation of flocs in the sewage. In addition, a booster assembly is arranged to pressurize the sedimentation environment, increase the dissolved oxygen content in the sewage, and make the sewage produce more bubbles when rolling to help the flocs connect and coagulate with each other, and settle quickly after being blocked by the multi-level grid plate. Finally, an installation frame moving along the bottom wall of the sedimentation tank is arranged to cooperate with a flippable side plate and a rolling plate, so as to scrape off the settled sludge and roll it under pressure through the roller, thereby reducing the water content of the sludge, thereby reducing the water content of the sewage discharge, and facilitating the treatment of the sludge.

The invention discloses a multilayer circuit board preparation method and system based on via hole filling optimization and a multilayer circuit board, and relates to the technical field of circuit board preparation, and the method comprises the steps: obtaining the size of a via hole, calculating the depth-to-width ratio, constructing a viscosity gradient function, taking a via hole filling quality evaluation index as a first optimization target, and solving an optimal ratio; designing a vacuum degree control strategy; the current capillary pressure is obtained, differential pressure driving force is calculated according to the current through hole gas pressure intensity, the time needed for filling and the preset ultrasonic vibration duration are calculated in combination with the through hole diameter, the hole depth and the viscosity gradient function, and ultrasonic auxiliary filling is carried out while through hole filling is carried out; filling the via hole, and controlling the vacuum degree according to the vacuum degree adjusting curve; and the real-time filling rate and the cavity volume are obtained, a second target function is constructed with the difference between the minimum target filling rate and the actual filling rate and the filling cost as a second optimization target, and the optimal filling step number and the optimal single injection material volume are solved.

The invention relates to the technical field of packaging equipment, in particular to a food packaging machine which comprises a rack, a film feeding assembly, a bag making assembly and a heat sealing assembly, the film feeding assembly, the bag making assembly and the heat sealing assembly are arranged on the rack, a mounting plate is arranged on the rack, and a discharging assembly is arranged on the mounting plate. The discharging assembly comprises a discharging hopper fixed to the machine frame and a discharging pipe fixed to the discharging hopper, the discharging pipe is sleeved with a manufactured packaging bag, a sealing assembly is arranged on the machine frame, and the sealing assembly is used for making the packaging bag arranged on the discharging pipe in a sleeving mode abut against the outer wall of the discharging pipe. The sealing assembly comprises two mounting rods connected to the mounting plate in a sliding mode, a first sealing ring, a second sealing ring and a double-end air cylinder, wherein the first sealing ring and the second sealing ring are fixed to the mounting rods, and the double-end air cylinder is arranged on the mounting plate. The device has the effect of reducing dust materials adhering to the packaging bag.

The invention relates to the technical field of toilet waterproofing, and provides a toilet waterproof structure and a construction method thereof.The toilet waterproof structure is arranged at the junction of a dry area finished surface and a wet area finished surface and sequentially comprises a threshold stone, a bonding layer arranged on the lower surface of the threshold stone and a waterproof layer arranged below the bonding layer from top to bottom; the upper surface of the threshold stone is flush with the upper surface of the dry area finished surface, the upper surface of the threshold stone is higher than the upper surface of the wet area finished surface, and the waterproof layer is laid on the upper surface of the structure base layer; the two sides of the waterproof layer extend to the positions below the dry area finished face and the wet area finished face respectively, and the waterproof layer comprises a first area arranged below the wet area finished face, a second area arranged at the junction of the threshold stone and the wet area finished face, a third area arranged below the threshold stone and a fourth area arranged below the dry area finished face. The waterproof structure has the beneficial effect that the waterproof effect of the doorsill of the toilet is improved.

The invention relates to the technical field of automobile part structures, in particular to a planet row speed reducer lubricating structure for coaxial distributed driving. Comprising a shell, an input shaft, a gear ring, a plurality of planetary gears, a plurality of planetary shafts, a planetary carrier and an oil receiving disc. The gear ring is of an annular structure fixed to the shell. The planetary gears are arranged at intervals in the circumferential direction of the input shaft with the axis of the input shaft as the center, and the planetary gears are meshed with the input shaft and the gear ring; one end of the planetary shaft penetrates through the planetary gear; the planet carrier is sleeved on the input shaft in a manner of rotating around the axis of the input shaft, the planet carrier is fixedly connected with the other end of the planet shaft in the direction of rotating around the axis of the input shaft, and the oil receiving disc is fixed on one axial side of the planet carrier; and the oil liquid sprayed out of the oil liquid channel of the shell is uniformly distributed to the planet carrier, the planet gear, the planet shaft and the first bearing structure in the axial direction. The speed reducer is simple in structure, a special electronic pump does not need to be configured, the energy effect is greatly reduced, and the problem that the NVH effect is poor is solved.

The negative pressure drainage device comprises an air pressure balloon, a drainage tube and a drainage needle, the air pressure balloon is connected with the drainage needle through the drainage tube, a tip is arranged at the end of the drainage needle, a drainage hole is formed in the tip of the drainage needle, an air bag is arranged on the outer side of the drainage needle, the air bag is communicated with the drainage needle through an air valve, and a center ball is arranged in the middle in the drainage needle. The outer side of the central ball is connected with a side ball through a flexible wire; a drainage bottle is arranged on the rear side of the air pressure balloon; by means of the air bag, the air pressure balloon is pinched, air in the air pressure balloon enters the drainage needle and enters the air bag, the problem that the air in the drainage needle flows out of the drainage hole, and consequently a surgical wound bulges is solved or reduced, and exudate can be discharged easily; in addition, the air bag plays a blocking role, flowing of the percolate to other positions is reduced, flowing of the percolate to the drainage hole is facilitated, and therefore the percolate is conveniently led out. In addition, the air bag presses the wound surface, so that exudation of exudate of an operation part is reduced.

The utility model discloses a packaging adhesive film and a photovoltaic module, the packaging adhesive film comprises a first adhesive film layer and a third adhesive film layer which are oppositely arranged, and a second adhesive film layer is arranged between the first adhesive film layer and the third adhesive film layer; the first adhesive film layer is provided with a first groove, and the first groove is located in the side, away from the second adhesive film layer, of the first adhesive film layer; the first groove is formed in the surface of the first adhesive film layer, so that the gram weight of the packaging adhesive film can be effectively reduced, and the cost of the packaging adhesive film is reduced; before follow-up lamination, the packaging adhesive film needs to be laid on the battery piece, the first groove is located in the surface of the side, close to the battery piece, of the packaging adhesive film and makes contact with the battery piece, mechanical anti-sliding can be achieved before lamination, overall flowing, caused by extrusion, of the packaging adhesive film can be reduced in lamination, and local flowing of the packaging adhesive film is achieved; and the first groove can be tightly attached to a welding strip on the battery piece, so that the overall sealing performance of the photovoltaic module is improved.

The invention relates to the technical field of brazing materials, in particular to brazing filler metal and a preparation method and application thereof. The solid state of the brazing filler metal is in a sandwich foil shape, the brazing filler metal comprises a foil-shaped brazing filler metal core and an aluminum foil layer wrapping the peripheral side of the brazing filler metal core, and the brazing filler metal core contains Sr and foamed aluminum particles. The preparation method comprises the following steps: S1, melting a required amount of aluminum foil layer raw material into molten metal, and casting to obtain a hollow plate-shaped aluminum frame body with openings at two ends; s2, a required amount of brazing filler metal metal core raw material is heated to prepare a metal suspension containing solid foamed aluminum particles, the metal suspension is injected into the aluminum frame body, and a composite metal plate is obtained after cooling; and S3, the composite metal plate is subjected to multi-pass rough rolling and finish rolling, and the sandwich foil-shaped brazing filler metal is obtained. The brazing filler metal structure and the formula components are optimized and improved, brazing filler metal loss and brazing filler metal liquid turbulence during brazing can be restrained, and the shear strength of a brazed joint is improved.

The embodiments of this specification disclose a control method, device and system for optimizing the voltage and reactive power of a distribution network. Among them, the control method applied to the master station side includes: receiving an adjustment request issued by a first device; obtaining distribution network data; determining the adjustment capability of the first device; if the first device has the adjustment capability, and it is determined according to the distribution network data that the adjustment request does not meet the preset control target, then sending a termination action instruction to the first device to cause the first device to terminate the adjustment action and perform optimization control. Applying the technical solution of the embodiments of this specification, the device side reports the voltage and reactive power adjustment demand to the master station. The master station coordinates the mutual actions between the devices at all levels according to the device's request and the optimization control target of the regional voltage and reactive power, realizes the reactive power balance on the spot, improves the transmission capacity of the line, and optimizes the control effect of the regional voltage and reactive power.

The invention relates to the technical field of turbofan cannon fire extinguishing devices, and discloses a fine water mist turbofan cannon fire extinguishing device which is characterized in that a turbofan cannon inner barrel is coaxially arranged on the inner side of a turbofan cannon outer barrel, a turbofan synchronously and fixedly connected with the turbofan cannon inner barrel and a mounting barrel is fixedly mounted at the rear end of the turbofan cannon outer barrel, and an atomizing ring is fixed to the end of a flow guide cover; the output end of the high-speed motor is fixedly connected with the turbofan, six sets of flow guide units are evenly arranged on the inner side wall of the turbofan cannon inner barrel in the length direction, a reset spring is fixedly connected between every two adjacent sets of flow guide units, and the distance between the flow guide units is adjusted in a self-adaptive mode according to gas impact force generated when the turbofan rotates. According to the turbofan cannon, self-balance of vortex and gas quantity is achieved, the pushing distance of the turbofan cannon and the package carrying quantity of fog drops are guaranteed, the output state of the turbofan cannon can be adjusted in real time according to the pitching angle of the turbofan cannon, and the adaptability to fire behaviors is improved by being in different output states under high and low fire behaviors.

The present invention discloses a vertical wet electrostatic precipitator, comprising a plurality of dust collecting electrodes and cathode wires, wherein the dust collecting electrode is a sieve tube with a plurality of through holes on the tube wall, the cathode wire is arranged in the dust collecting electrode, a sealing plate is arranged on the top of the sieve tube, the sealing plate connects the sieve tubes, the sealing plate shields the gap area between the sieve tubes, and a nozzle for spraying water to the outer wall of the sieve tube is arranged in the gap area. The present invention can be flushed without power off, the dust collecting space and the airflow space are separated, the secondary dust problem on the dust collecting electrode is solved, and the dust removal efficiency is improved.

The invention belongs to the technical field of beach land detection equipment, and particularly relates to beach land sampling detection equipment and a detection method.The equipment comprises a propelling barrel and a sampling barrel arranged in the propelling barrel and further comprises a plurality of interlayer assemblies, each interlayer assembly comprises a plurality of elastic pieces, and the fixing ends of the elastic pieces are installed on the inner side wall of the sampling barrel; the sampling device further comprises a pressure regulating assembly, the pressure of different sampling cavities is controlled through the pressure regulating assembly, the sampling barrel is divided into the different sampling cavities through the interlayer assembly, and the pressure of each sampling cavity is controlled through the designed pressure regulating assembly; the gas in each sampling chamber is extracted to adsorb the soil layer sample in each chamber, so that the flowing of the soil layer sample among the chambers is reduced; the mastering of the controller on the pressure of each sampling chamber is improved through the detected pressure data, so that the pressure of each sampling chamber is ensured to be enough to limit the position of the soil layer sample in each sampling chamber, and meanwhile, the integrity of the soil layer sample is ensured.

The invention relates to the field of finish paint, in particular to chemical-resistant electroplating finish paint as well as a preparation method and application thereof. The chemical-resistant electroplating finish paint is prepared from the following raw materials in parts by mass: 30 to 50 parts of modified acrylate, 15 to 30 parts of epoxy resin, 5 to 10 parts of modified particles, 3 to 6 parts of photoinitiator, 2 to 3 parts of flatting agent, 0.5 to 1 part of defoaming agent, 3 to 10 parts of pigment and 20 to 40 parts of solvent. The finally prepared electroplating finish paint not only has excellent durability and chemical resistance, but also can be further improved in water resistance, aging resistance and mechanical properties, so that the performance requirements of the existing electroplating finish paint are effectively met, and the electroplating finish paint can be effectively applied to the field of cosmetic packaging and has wide application prospects. And meanwhile, the resistance to chemical substances (such as perfume, emulsion and the like) is also effectively improved, and the product has a very excellent application prospect.

This invention provides a connection structure for air conditioning pipes, relating to the field of air conditioning pipe connections. It includes: a connecting pipe, a fixing plate, sealing washers, a connecting nut, a connecting platform, a connecting plate, an audible and visual alarm, and a fixing rod. The fixing plate is fixedly connected to the middle of the connecting pipe. The connecting nut is threadedly connected to the left and right sides of the connecting pipe. The sealing washers are located on the left and right sides of the connecting pipe. The connecting platform is fixedly connected to the outside of the connecting nut. The connecting plate is threadedly connected to the outside of the connecting platform. The audible and visual alarm is fixedly connected to the outside of the connecting plate. The fixing rod is fixedly connected to the middle of the connecting pipe. This invention avoids situations where the connection lengths of the copper pipes on both sides differ excessively, ensuring the tightness of the air conditioning pipe connection, improving the connection effect of the air conditioning pipe, and enhancing the usability of the connection structure. It solves the problem that existing connection structures easily affect the connection effect of air conditioning copper pipes and the usability of the connection structure itself.

The invention relates to overheat controlled thermal storage. A vapor compression system includes a compressor, a condenser, an expansion device, and an evaporator fluidly connected to form a closed fluid circuit having a working fluid circulating therethrough. The thermal storage device includes a storage material, and the thermal storage device is thermally coupled to the closed fluid circuit downstream of the expansion device with respect to the flow of the working fluid. The vapor compression system is controllable such that the heat storage device is operable to both store and release heat when the working fluid circulates through the closed fluid circuit in a given direction.

The invention discloses a drug for constructing a venous inflammation model in the field of phlebitis model technology, comprising the following preparation steps: S1: preparing a carbomer hydrogel, comprising the following steps: step 1: putting 2.5g of carbomer and 19.5ml of pure water into a beaker and stirring to form a mixture; step 2: letting the mixture stand and stirring several times at intervals of 5 to 10 minutes; step 3: adding several drops of triethanolamine into the beaker; step 4: adding 5ml of pure water into the beaker, then adding 0.5ml of antibacterial agent, and then stirring; S2: injecting 25ml of 20% mannitol into the carbomer hydrogel and then standing; S3: injecting 1.5μl of TBHP stock solution into the carbomer hydrogel, and uniformly mixing the carbomer hydrogel with TBHP. The present invention uses carbomer hydrogel to uniformly mix mannitol and TBHP; and compared with injecting drugs into blood vessels, injecting into the perivascular area is not only easier to operate and has a high success rate, but also can avoid the drug from spreading to the whole body with the blood, causing systemic toxicity.

The present invention proposes a method for optimizing the design of an energy-saving butterfly valve structure, which relates to the technical field of computer-aided three-dimensional modeling. The energy-saving butterfly valve is three-dimensionally modeled to create a valve body and a valve plate of the energy-saving valve. A fluid channel and a fluid domain that penetrate the valve body are created inside the valve body. The fluid domain includes a curved area located at the center of the inner surface and a plane area located on both sides of the center. The sealing parameters of the sealing structure of the valve plate periphery are designed to ensure that the actual sealing pressure of the sealing structure is within a limited range. The three-dimensional model of the energy-saving butterfly valve is fluid simulated to optimize the curved area and plane area parameters of the fluid domain. The energy-saving butterfly valve structure designed by optimization can extend its service life, reduce the amount of sealant used, and reduce costs while ensuring the sealing performance.

This invention relates to wood-plastic composite (WPC) production technology, and more particularly to a micro-foaming molding equipment and method for WPC door panels. The WPC door panel micro-foaming molding equipment includes an extruder and an extrusion die. The extrusion die includes a flow-collecting module, within which a mandrel is disposed. Vertical baffles are arranged between the mandrels, and the upper and lower end faces of the baffles are fixedly connected to the flow-collecting module. This invention features a novel structure. The baffles divide the WPC material into several material units, ensuring that each material unit does not interfere with others and that cross-flow does not occur between material units. This guarantees balanced material flow and consistent material pressure in each material unit, and maintains stable friction between the material units and the mandrels.

The utility model belongs to ultrasonic water gauge technical field discloses a kind of circuit board module and ultrasonic water gauge.The circuit board module includes glue filling box, circuit board, liquid crystal screen and liquid crystal support. Among them, liquid crystal support sealing connection is at the bottom of glue filling box, and form airtight space between with the bottom of glue filling box, liquid crystal screen is set in airtight space, circuit board is set in glue filling box and located the side of liquid crystal support far from liquid crystal screen.Good at liquid crystal screen is equipped with connecting pin foot, and liquid crystal support is provided with connecting convex part towards circuit board, connecting pin foot is arranged in connecting convex part and is connected with circuit board, to realize the electric connection of liquid crystal screen and liquid crystal support, and connecting pin foot is connected with circuit board by connecting convex part, increase the arrangement path of connecting pin foot in liquid crystal support, so that even when filling, filling glue flows into airtight space by connecting pin foot, due to the additional connecting convex part, increase flow path, to effectively prevent filling glue from polluting liquid crystal screen.

The plasma air purification equipment comprises a first body, a second body, a plasma generator, a driving part and a filtering assembly, the first body is of a hollow cylindrical structure, a first air inlet and a first air outlet are formed in the outer side wall of the first body, the second body is of a hollow cylindrical structure, and a second air inlet and a second air outlet are formed in the outer side wall of the second body. The second body is located in the first body, the second body and the first body can generate relative rotation, a second air inlet and a second air outlet are formed in the side wall of the second body, and the driving component is used for driving the first body and the second body to generate relative rotation. The invention aims to solve the technical problems that the staying time of external air in the existing purification equipment is short, the reaction is insufficient, the purification effect is poor, and more positive and negative ions are discharged from an air outlet and are combined with pollutants to settle on a food processing device or the surface of food, so that the pollution to the food is deepened.

The utility model discloses a blade and an impeller. The molded lines of an inner layer and an outer layer of an existing blade are the same and are not changed, so that the speed of fluid passing through the inner layer and the outer layer of the blade is close, the pressure difference between the inner layer and the outer layer of the blade is small, and the working efficiency of an impeller is low. The curvature of the inner-layer molded line of the blade is larger than the curvature of the outer-layer molded line of the molded line of the blade; according to the impeller using the blades, the impeller cover and the impeller disc are oppositely arranged at an interval, the multiple blades which are arranged at equal intervals in the circumferential direction are arranged between the impeller cover and the impeller disc, and the two ends of each blade are fixed to the impeller cover and the impeller disc. The curvature of the inner-layer molded line is larger than that of the outer-layer molded line, so that when fluid flows through the blade, the fluid in the inner layer of the blade flows slowly and is large in pressure, the fluid in the outer layer of the blade flows quickly and is small in pressure, and a large pressure difference is generated on the surface of the blade, so that the impeller is effectively pushed to rotate, and the working efficiency of the impeller is improved.

The invention discloses a face recognition device based on building construction, and particularly relates to the field of face recognition devices.The face recognition device comprises a box body, an inner cavity of the box body is divided into a water storage cavity and an equipment cavity through a partition plate, the equipment cavity is formed in the top of the water storage cavity, and a flow stabilizing plate and a filtering plate are arranged in the middle of the water storage cavity of the box body. According to the face recognition device, the rotating box can be controlled to rotate up and down and rotate horizontally by starting the first stepping motor and the second stepping motor, the shooting angle and direction of the face recognition lens can be adjusted, and the face recognition device can be conveniently adapted to workers at different positions and with different heights for face recognition; when the lens needs to be cleaned, the supporting rod can be automatically controlled to rotate, the sponge wiper wipes and cleans the lens, a worker can conveniently wipe and clean the face through the paper roll, the water pump is started to spray out liquid through the water pipe, cleaning water is conveniently provided for cleaning the face of the worker, and the face recognition effect is improved.

The utility model discloses a rapid liquid cooling device, which relates to the technical field of cooling devices and comprises a shell, a protective cover is arranged at the top end of the shell, a condensate outlet is arranged on one side of the top end of the shell, a condensate inlet is arranged on one side of the bottom end of the shell, a feed port is arranged on one side of the shell, and a discharge port is arranged on the other side of the shell. And a cooling pipe and a bladeless fan are arranged in the shell. According to the rapid liquid cooling device, the shell is matched with the protective cover, a closed cooling environment is provided while internal parts of the rapid liquid cooling device are protected, the stability and the cooling effect during liquid cooling are improved, the cooling pipe is matched with the bladeless fan, liquid is shunted through the cooling pipe, the liquid flows more slowly, and the cooling effect is improved. And the liquid cooling effect is improved, and the liquid cooling speed is increased through the bladeless fan.

The invention discloses a magnetized graphene-nano silicate gel and a preparation method thereof. The amount of each component is weighed according to the mass ratio, nano silicon oxide and ultrafine powder clinker are put into a planetary mixer for stirring, deionized water is added to stir a gelling component slurry, after standing, deionized water and orthosilicic acid are added while stirring the slurry to obtain an initial silicate gel; a dissolving agent is then added dropwise at a uniform speed while stirring to obtain a dissolved silicate gel, a nano cellulose solution is added to the dissolved silicate gel, a silane coupling agent is added and stirred to obtain a nano silicate gel suspension, graphene is added for magnetization, the suspension is allowed to stand, water is filtered and dried to obtain the magnetized graphene-nano silicate gel powder, which can be applied to concrete to improve the flexural and compressive strength of early concrete and improve the cohesiveness and segregation of concrete.

The utility model discloses a real-time workshop waste gas concentration detection device, relates to the technical field of detection devices, and aims to solve the problems that an existing detection device in the prior art cannot continuously detect the workshop waste gas concentration for a long time, is not beneficial to real-time detection of the workshop waste gas concentration and is poor in practicability. A gas inlet pipeline is fixedly installed on one side of the detection box, a gas outlet pipeline is fixedly installed on the other side of the detection box, the gas inlet pipeline and the gas outlet pipeline are both communicated with the detection box, a protective cover is fixedly installed in the middle of the upper portion of the detection box, and a waste gas concentration detector is arranged in the protective cover. The waste gas concentration detector is fixedly connected with the detection box through screws, the input end of the waste gas concentration detector extends into the detection box, a fan is fixedly mounted on one side of the interior of the detection box, and a dust filtering plate is fixedly mounted on the other side of the interior of the detection box; and a dust falling groove hole is formed in the detection box along the lower part of one side of the dust filtering plate.

The invention discloses a self-propelled biosafety laboratory, which comprises a passenger van body, the passenger van body comprises a laboratory, a power distribution room, and a temperature-controlled ventilation equipment room, the laboratory is arranged in the passenger van body, the laboratory comprises a reagent preparation room, a specimen preparation room, and an amplification analysis room which are arranged in sequence and are sealed and independently arranged with each other, a first generator is respectively connected to an engine and a low-voltage distribution box of the passenger van body, a 220V inverter is respectively connected to the low-voltage distribution box and a vehicle-mounted UPS, a second generator is connected to the vehicle-mounted UPS, the vehicle-mounted UPS is connected to the high-voltage distribution box, the high-voltage distribution box is respectively used to supply power to the reagent preparation room, the specimen preparation room, the amplification analysis room, and the temperature-controlled ventilation equipment room; a first fresh air system for introducing or exhausting air into the reagent preparation room, a second fresh air system for introducing or exhausting air into the specimen preparation room, and a third fresh air system for introducing or exhausting air into the amplification analysis room are respectively arranged in the temperature-controlled ventilation equipment room.

The utility model discloses a graphite boat ceramic ring, which relates to the technical field of ceramic rings and comprises an outer ring and an inner ring, the outer ring is sleeved on the inner ring and is connected with the inner ring into a whole, inner grooves with trapezoidal cross sections are symmetrically arranged up and down along the circumference of the inner ring, and a plurality of annular grooves are uniformly distributed on the outer ring. According to the graphite boat, the annular groove structure is arranged on the peripheral surface of the outer ring, and the trapezoidal inner groove is additionally arranged on the inner ring, so that the flowing of gas can be slowed down, and the problem that the quality of a deposited film layer is reduced due to conduction between boat pages along with the increase of the use times of the graphite boat is solved.