22results about How to "Avoid high temperature" patented technology

The utility model discloses a hydraulic control butterfly valve with good heat dissipation performance, which belongs to the technical field of valves, and comprises a valve casing, bearings are arranged on the opposite inner walls of the valve casing, a same rotating shaft is arranged in the two bearings in a penetrating manner, the surface of the rotating shaft is fixedly connected with a valve plate, the top end of the rotating shaft is fixedly connected with a rotating plate, and the rotating plate is fixedly connected with the valve plate. The bottom of the rotating plate is fixedly connected with a sliding rod, the surface of the sliding rod is movably sleeved with a sliding barrel, the surface of the valve shell is fixedly connected with a supporting plate, and the top of the supporting plate is fixedly connected with a fixing plate. The hydraulic cylinder has the beneficial effects that the refrigerator and the cooling liquid are arranged, the cooling liquid is cooled through the refrigerator, hydraulic oil in the coil pipe is cooled through the cooling liquid, meanwhile, the hydraulic oil in the hydraulic cylinder is circulated through the oil inlet hose and the oil outlet hose, high temperature of the hydraulic oil in the hydraulic cylinder is avoided, and normal use of the hydraulic cylinder is guaranteed; the service life of the hydraulic cylinder is ensured.

This invention relates to the field of organic compound preparation technology, specifically a method for preparing 11-triglycerides of carbonate via low-temperature acylation. This method uses glycerol and undecanoyl chloride as raw materials, employing a synergistic system of a "composite acid-binding agent + Lewis acid catalyst," and combines in-situ dehydration technology and a stepwise heating strategy in a dual-solvent environment to achieve efficient synthesis. The specific steps include: under nitrogen protection, dissolving glycerol in a dichloromethane-toluene dual solvent, adding a composite acid-binding agent of pyridine and N,N-diisopropylethylamine, anhydrous zinc chloride catalyst, and 4A molecular sieve for in-situ dehydration; dropwise adding undecanoyl chloride at a low temperature of 5-10°C, followed by sequential heating to 30°C for 2-3 hours and then reacting at 50°C for 12-16 hours; and post-processing using a combined process of filtration-multi-stage extraction-membrane separation-column chromatography. This invention provides mild reaction conditions, effectively suppresses side reactions, produces high-purity products, increases molar yield, and reduces solvent toxicity and purification costs.

The utility model provides an electric arc furnace energy -saving type furnace cover, including setting in the electric arc furnace furnace cover of furnace body top, the electric arc furnace furnace cover outer wall integrative extension ring, the electric arc furnace furnace cover inside start to have the water tank, extension ring outer wall fixed mounting has the water inlet pipe and the water outlet pipe respectively, the water inlet pipe and the water outlet pipe all are linked with the water tank, the electric arc furnace furnace cover top fixed mounting has L type pipe, L type pipe end is connected with the connecting pipe, the connecting pipe is away from L type pipe one end fixed connection has the wind collecting bucket, be provided with the blower mechanism on the wind collecting bucket, extension ring outer wall inserts has the U type hanger, extension ring top is provided with locking mechanism, this furnace cover can cool the cooling water flowing in the inside, make reduce the evaporation consumption of cooling water, has realized the energy -conservation, still be provided with the detachable hanger, can effectively avoid the furnace cover long time to be received on the high temperature furnace cover's lifting lug and be loose, like this has the problem of the security hidden danger when replacing the furnace cover and hoisting.

This utility model discloses a machining device for positioning holes in CNC machining fixtures, relating to the field of positioning hole machining technology. It includes a worktable with an adjustment component inside, and a U-shaped frame fixed to the top of the worktable. A movable plate is slidably connected to the inner wall of the U-shaped frame, and an oil spraying component is located at the top of the movable plate. The adjustment component includes a fixed seat fixed to the center of the top of the worktable. This utility model achieves positioning and fixing of the positioning hole by inserting a positioning pin into the positioning hole in the part. When the tapered shaft rises, multiple sets of ball joints compress the return spring and extend from inside the positioning pin until the end face of the ball joint abuts against the inner wall of the positioning hole in the part. This effectively adapts to changes in the diameter of the positioning hole, ensuring precise alignment between the part and the tool, thereby improving machining accuracy, enhancing the versatility and flexibility of the device, avoiding frequent replacement of positioning pins of different sizes, simplifying the operation process, and improving production efficiency.

This utility model discloses a circulating water device for a prebaked anode calcining furnace, comprising: a heat-conducting frame one, an outer heat-collecting cylinder fixedly connected to the inner surface of the heat-conducting frame one, a heat-conducting frame two fixedly connected to the inner surface of the outer heat-collecting cylinder, a heat-gathering ring fixedly connected to the inner surface of the heat-conducting frame two, a heat-gathering tube tightly fitted to the inner surface of the heat-gathering tube, a water outlet pipe and a superconducting heat column fixedly connected to the upper outer surface of the heat-gathering tube, a reinforcing connecting rod fixedly connected to the side surface of the water outlet pipe, a hot water pipe fixedly connected to the lower outer surface of the reinforcing connecting rod, and sealing flange one and sealing flange two fixedly connected to the outer surfaces of the hot water pipe and the water outlet pipe, respectively. Through the coordinated use of the above components, the device achieves efficient water circulation and heat recovery, while also preventing high temperature of the equipment. In addition, the device can be flexibly expanded with external equipment.

The invention discloses composite foam as well as a preparation method and application thereof. The structure of the composite foam comprises a metal material which is selected from a metal simple substance or a metal alloy; the hollow glass microspheres and the reinforcing filler are dispersed in the metal material; wherein all the hollow glass microspheres are embedded in the metal material. In the composite foam, a composite cavity is formed by using the preformed hollow glass microspheres and stacking gaps among the microspheres, so that the density of the composite foam is reduced, and the strength and functionality of the composite foam are also ensured; connection enhancement of the preformed hollow microspheres is synchronously achieved through the metal material deposition process, and the process is convenient and efficient through connection of the reinforcing filler and the hollow microspheres.

This invention discloses a freeze-dried oral patch containing vitamin C and its preparation method. The patch comprises a drug-containing layer and a backing layer. The drug-containing layer comprises: 100 mg of vitamin C, 0.01-0.1 mg of opacifier, 30-80 mg of film-forming material, 0.01-2 mg of flavoring agent, and 0.01-0.1 mg of stabilizer. The backing layer comprises: 10-50 mg of film-forming material and an appropriate amount of pigment. The preparation method is as follows: the prescribed amount of film-forming material and an appropriate amount of pigment are completely dissolved in water to prepare a backing layer solution; the prescribed amount of vitamin C, flavoring agent, protective agent, and film-forming material are completely dissolved in a solvent to prepare a drug-containing layer solution; the backing layer solution is first filled and heated to set the film; the drug-containing solution is filled into a cold aluminum foil mold with a backing film already in place; it is then frozen and set in a liquid nitrogen tunnel; and finally freeze-dried in a freeze dryer and packaged to obtain the vitamin freeze-dried oral patch.

This utility model discloses a cooling device for a low-speed grinding mill, including a grinding mill body. The upper end of the grinding mill body has a feed inlet connected to the grinding mill body. A pneumatic motor is fixed to the upper end of the grinding mill body. A cold air inlet is opened on the grinding mill body. A circulating water outlet and a circulating water inlet are opened on the right side of the grinding mill body. A solenoid valve is installed at the lower outlet of the grinding mill body. Inside the grinding mill body is a transmission rod connected to the pneumatic motor. The lower end of the transmission rod is connected to a grinding block. The lower end of the grinding block has a grinding disc. Inside the grinding block is an umbrella-shaped cooling chamber connected to the cold air inlet. A cooling cavity is opened inside the grinding mill body. The cold air inlet transmits the external low-temperature medium to the collar, and the air inlet transmits the low-temperature medium to the cooling chamber, cooling the grinding block as a whole and preventing the grinding block and grinding disc from overheating during the grinding of soapberry rice, which could cause the soapberry rice to stick together.

The protection mechanism comprises a supporting table, a heating barrel, a hydraulic cylinder, a motor, a bearing rod, a heating rod and a stirring cutter, the right side of the bottom of the heating barrel is movably connected with the right side of the top of the supporting table through a shaft pin, and the bottom of the hydraulic cylinder is movably connected with the two sides of the left side of the top of the supporting table through shaft pins. By arranging the first screen plate cover and the second screen plate cover, the heating rod is sealed inside, so that when the heat of the heating rod is dissipated, the master batch is blocked by the first screen plate cover and the second screen plate cover and cannot be in direct contact with the heating rod, and the problem that the master batch can be in direct contact with the heating rod due to high temperature generated on the surface when the heating rod is heated is solved. The problems that a layer of master batch adheres to the surface of the heating rod, heat of the heating rod is dissipated too slowly, the local temperature of the heating rod is too high, and the heating rod is damaged for a long time are solved, and the effect of protecting the heating rod is achieved.

The utility model discloses a kind of electrical cabinet quick response load monitoring devices, belong to power system monitoring and control technical field, load monitoring installation plate is assembled with load monitoring piece, the wire connection of load monitoring piece is equipped with the connecting block for clamping, data transmission and receiving connection port are symmetrically installed on the two sides of load monitoring piece, data transmission and receiving connection port side is equipped with power connection, electrical component and load monitoring piece are one-to-one cooperation structure, the data of monitoring is more accurate while effectively improving the service life of load monitoring piece, not to the temperature higher problem caused by simultaneous monitoring, speed slow, electrical component and wire are cut-off structure, effectively avoid the problem that temperature is relatively high caused by equipment and wire more concentrated, in the process of load monitoring installation plate sliding, it is convenient to repair and replace operation function to load monitoring installation plate, partition installation plate and electrical component.

The utility model discloses an electro-hydraulic actuating mechanism for a high-temperature environment, which belongs to the technical field of actuators, solves the problem that when an existing device works in the high-temperature environment, heat is continuously conducted into hydraulic oil through a hose, and high temperature of equipment is easily caused, and comprises a hydraulic oil cylinder, a motor part, a main body, a movable rod and a connecting pipe, the motor part is connected with the hydraulic oil cylinder and used for driving hydraulic oil in the hydraulic oil cylinder to flow, the connecting pipe and the hydraulic oil cylinder form a passage through the heat dissipation pipeline, the heat dissipation pipeline comprises a first hose and a second hose, the first hose is fixedly connected to the connecting pipe, and heat in the hydraulic oil is absorbed through a U-shaped pipe; and the speed of air circulation between the first connecting disc and the second connecting disc is increased through the cooling fan, heat exchange can be conducted between the U-shaped pipe and outside air, the purpose of cooling the hydraulic oil is achieved, and the situation of high temperature of equipment is avoided.

The utility model relates to the technical field of drying -machine, concretely is a kind of drying -machine for hawthorn strip production, including the box of drying -machine, control box is installed on the outer wall of box, the inside wall of one side of box is equipped with exhaust hole and the cabinet door of hinged in one side of box, the inside of the box is provided with placing mechanism, the top outer wall of the box is equipped with the driving mechanism connected with placing mechanism, the inside wall of the bottom of the box is equipped with mounting port, and the inside wall of mounting port is equipped with the jacking assembly contacted with placing mechanism. The utility model has the beneficial effects that by setting jacking assembly in the box, jacking assembly is lifted to placing mechanism, placing mechanism is connected with driving mechanism by being lifted, and the reduction motor in driving mechanism drives placing mechanism to rotate, to avoid the situation that hawthorn strip in placing disc is excessively dried, solve the problem that hawthorn drying -machine is prone to hawthorn excessive drying when working.

The invention provides a squalene production strain capable of automatically cracking and application of the squalene production strain in preparation of squalene. The strain is obtained by taking saccharomyces cerevisiae as an original strain and enhancing the activity of a gene encoding the following enzyme, the enzyme comprises acetyl coenzyme A transferase, 3-methyl-3-hydroxyglutaryl coenzyme A synthase, 3-hydroxy-3-methylglutaryl coenzyme A reductase, mevalonate kinase, mevalonic acid-5-phosphate kinase, mevalonic acid-5-pyrophosphate decarboxylase, isopentenyl pyrophosphate isomerase, farnesyl pyrophosphate synthase and squalene synthase. The invention further discloses a preparation method of the enzyme. After the engineering bacterium finishes efficient synthesis of squalene, cells are cracked to efficiently release squalene accumulated in the cells into fermentation liquor, so that separation and purification of downstream products are more convenient, downstream processes are simplified, the cost is reduced, and the production economy is integrally improved.

The invention discloses a strontium-barium ratio obtaining method for discriminating a deposition environment and a deposition environment discriminating method, and the method comprises the following steps: carrying out targeted selective extraction on different adsorption elements by adopting two different reagents, namely leaching the surface of a sediment by using neutral ammonium carbonate to obtain the adsorbed strontium content ([Sr] AC); the adsorbed barium content ([Ba] HAc) is obtained by leaching the surface of the sediment with acetic acid, so that the ratio of [Sr] AC / [Ba] HAc of the selectively extracted solution is obtained, the environment is a marine deposition environment when the [Sr] AC / [Ba] HAc is greater than 1.5, the environment is a sea-land mutual deposition environment when the [Sr] AC / [Ba] HAc is less than or equal to 1.5 and greater than 0.35, and the environment is a river / lacustrine deposition environment when the [Sr] AC / [Ba] HAc is less than or equal to 0.35. Compared with a traditional method, the method has the advantages that the adverse effect of dissolution of carbonate and barite in the sediment on data is reduced to the maximum extent, and the obtained [Sr] AC / [Ba] HAc ratio can better reflect / rebuild the sedimentary environment.

The utility model relates to the technical field of hydraulic pumping, specifically relates to a kind of pumping device with cooling structure, including hydraulic pump and oil tank, further include heat exchanger, heat exchanger is provided with heat exchange cavity, and cooling liquid is provided in the heat exchange cavity, and heat exchange coil pipe is soaked in cooling liquid, the inlet interface and discharge interface of heat exchange coil pipe are placed in the outside of heat exchanger, the oil inlet of hydraulic pump and the oil outlet end of oil tank are connected, the oil outlet of hydraulic pump is connected with oil supply pipeline, the inlet interface of heat exchange coil pipe is connected with oil return pipeline, and the discharge interface of heat exchange coil pipe is connected with the oil inlet of oil tank by conveying pipe and oil outlet end. In the prior art, the pumping device of liquid pressure test mostly does not have cooling structure, and the problem that oil temperature is too high to cause hydraulic oil oxidation and deterioration, and simultaneously damage valve body and other hydraulic components.

The utility model relates to a device for measuring the length and width of a blank, which is characterized in that the device comprises a moving trolley, a telescopic rod and a marker post, the marker post is arranged on the moving trolley through the telescopic rod, a scale is arranged on the marker post, the moving trolley comprises a frame, four universal wheels are arranged at the bottom end of the frame, a handrail is arranged on one side of the frame, and the handrail is arranged on the other side of the frame. Two telescopic rods are symmetrically arranged at the upper end of the frame, so that the marker post can be adjusted up and down, the marker post is of a U-shaped structure and comprises a transverse marker post and side marker posts located on the two sides of the transverse marker post, one side marker post is arranged on the transverse marker post in a sliding mode, and a stop block is movably arranged on the side marker post and used for movably measuring and displaying the size of a blank; the device ensures that the size of the blank does not need to be verified after the blank is cooled while the casting of the continuous casting machine is not influenced, the safety is high, the length and the width of the hot charging blank can be rapidly measured at the same time, and the device is convenient and rapid to use.

The utility model discloses a high temperature and high pressure resistant petrochemical valve structure which comprises a valve body, a valve ball is arranged in the valve body, a first ceramic coating is arranged on the outer wall face of a ball valve, a valve rod is installed at one end of the ball valve, the other end of the valve rod extends to the outside and is provided with a gear, and pipelines are symmetrically arranged on the two sides of the valve body. The outer wall of the pipeline on one side is thickened to form an annular part, an annular groove is formed in the annular part, a plurality of positioning grooves are formed in one side of the annular groove, positioning blocks are arranged in the positioning grooves, the annular part is sleeved with crown teeth, connecting rods are installed between the positioning blocks and the crown teeth, and a plurality of holding rods are installed on the outer ring faces of the crown teeth. The high-temperature-resistant valve is simple in structure, the high-temperature resistance is improved through the first ceramic coating, the high-temperature-resistant capacity of the valve rod is improved, the joint of the valve rod and the valve cover can be protected through the sealing cylinder, double high-pressure-resistant protection is achieved between the valve rod and the valve cover, and safety is improved.

This invention relates to the technical field, and more particularly to a carbonization production system for wooden flower stand panels, comprising: a conveying mechanism and a carbonization mechanism disposed on the conveying mechanism, wherein the carbonization mechanism includes a spray gun assembly movable and rotatably disposed on the conveying mechanism, a converging assembly rotatably disposed at the flame end of the spray gun assembly, and an adjusting assembly disposed between the spray gun assembly and the converging assembly; the conveying mechanism continuously conveys the panels within the carbonization mechanism, and the spray gun assembly, in conjunction with the converging assembly, focuses the flame onto the carbonization area of ​​the panel. When grooves and / or ridges are formed on the surface of the panel, causing undulations, the adjusting assembly forces the spray gun assembly to move and rotate, adjusting the temperature of the flame emitted by the converging assembly. Simultaneously, the adjusting assembly forces the converging assembly to move and rotate, adjusting the distance and orientation between the emitted flame and the undulating surface of the panel. This solves the problems of flame dispersion, uneven carbonization and inconsistent depth, and the tendency to create blind spots in existing carbonization systems.

A comprehensive control method, implementation device, and application method for corkage on Akizuki pear fruit includes the following steps: preventing the orchard environment from being in a high-temperature state, timely supplementing the orchard soil with trace elements, timely external boron spraying during the growth period, and timely control of excessive growth of Akizuki pear trees. This ensures a normal supply of trace element nutrients during the fruiting state of Akizuki pear, solves the technical problems of temperature, nutrient deficiency, and nutritional imbalance, and thus improves the control effect on corkage on Akizuki pear fruit.

This invention provides an action conversion structure for an electric motor, relating to the field of electric motors, comprising: a rotor shaft, a conversion rotor, a conversion stator, cooling fan blades, a support slider, a support limiting block, a support pressure block, a heat dissipation mounting mechanism, and a conversion support mechanism; the conversion rotor is fixedly connected to the rotor shaft; the conversion stator is located on the inner end face inside the motor housing; the cooling fan blades are located behind the rotor shaft; the support slider is slidably connected inside the conversion stator; the support limiting block is slidably connected to the upper end face of the support slider; the support pressure block is fixedly connected to the upper end face of the support limiting block; the heat dissipation mounting mechanism is disposed on the cooling fan blades; and the conversion support mechanism is disposed inside the conversion stator. The heat dissipation mounting mechanism facilitates subsequent maintenance of the cooling fan blades, and the conversion support mechanism facilitates personnel installation of the conversion stator while ensuring installation efficiency. This solves the problem affecting the production efficiency of electric motors.

The invention relates to the technical field of breathing machines, and discloses an efficient filtering and heat dissipation device of a medical breathing machine, the efficient filtering and heat dissipation device comprises a filtering frame, the top of the filtering frame is fixedly connected with the breathing machine, and a filtering part is arranged in the filtering frame; the filtering component comprises a triangular frame, the surface of the triangular frame is fixedly connected with the inner wall of the breathing machine, a mounting frame is fixedly connected to the bottom of the triangular frame, a clamping groove is formed in the inner wall of the mounting frame, and two side plates are arranged in the mounting frame. When oxygen flows in the filter frame, the sieve pore plate can treat the oxygen entering the filter frame, impurities such as cotton fibers in the oxygen are prevented from entering the filter frame, the filter plate can filter the oxygen again after the sieve pore plate filters the oxygen, and the situation that the quality of the oxygen is poor due to the fact that the oxygen contains the impurities is avoided; when the oxygen in the filter frame enters the breathing machine, the filter bag can filter small particles in the oxygen again.

The invention discloses a preparation method of 1, 4-dimethylnaphthalene. According to the method, 1-methylnaphthalene is used as a raw material, a specific amount of beta-cyclodextrin is added in a chloromethylation reaction step to serve as a selective accelerant, beta-cyclodextrin and a naphthalene ring of 1-methylnaphthalene are subjected to subject-object clathration through a hydrophobic cavity of beta-cyclodextrin, the 4-site of the naphthalene ring is specifically exposed and activated, and the 1-methylnaphthalene is prepared. Therefore, the 1-chloromethyl-4-methylnaphthalene intermediate is efficiently and highly selectively generated. The intermediate is subjected to a reduction reaction, and is finally rectified to obtain high-purity 1, 4-dimethylnaphthalene. According to the present invention, through the directional guiding effect of the beta-cyclodextrin, the regioselectivity of the reaction is fundamentally improved, the isomer by-product is significantly reduced, the post-treatment process is simplified, the product purity and the total yield are high, the conditions are mild, and the method is suitable for industrial production.