79results about How to "Not easy to overheat" patented technology

The invention discloses a double-cylinder magnetorheological vibration reducer adopting coaction of an external coil and a permanent magnet. The double-cylinder magnetorheological vibration reducer comprises a magnetorheological vibration reducer body and a lifting lug; the magnetorheological vibration reducer body comprises a working cylinder, a liquid storage cylinder and a dustproof shell concentrically sleeved; a piston with a piston rod is matched in the working cylinder at intervals, and the working cylinder is fully filled with magnetorheological fluid; the liquid storage cylinder is filled with the magnetorheological fluid and compensation gas, and a liquid storage cylinder sealing mechanism and a base for sealing are fixedly arranged at the upper and lower ends; the top end of thepiston rod penetrates through the guide base and the liquid storage cylinder sealing mechanism in sequence, and extends out of the working cylinder to fixedly connect with the upper end of the dustproof shell; a magnetic exciting device is embedded in the dustproof shell; and an end cover is arranged at the lower end of the dustproof shell. The double-cylinder magnetorheological vibration reducerreduces the machining and assembly difficulty, saves the machining time and cost, prevents pollution of the magnetorheological fluid in the maintenance process, facilitates dissipation of coil heat,and prevents performance reduction caused by overheat of the magnetorheological fluid.

The invention relates to an electrode tab structure for a lithium ion power battery. The electrode tab structure comprises a metal conductor belt and an electrode tab rubber block, wherein the metal conductor belt is wrapped by the electrode tab rubber block in an encircling manner; a fusing part is arranged on the metal conductor belt and is positioned at the part, where the metal conductor belt is contacted with the electrode tab rubber block; the fusing part is a specially-shaped structure; the fusing part is completely wrapped by the electrode tab rubber block so that the battery can be protected when current is too high; and the fusing part is a Z-shaped or O-shaped structure processed from the metal conductor belt. The electrode tab structure is simple and easy to process; additional materials are unnecessary to add; sparks cannot be generated while fusing; and the electrode tab structure disclosed by the invention is an electrode tab having an overload self-fusing function.

The invention relates to an iron-based catalyst for preparing low-carbon olefin directly from synthesis gas and a preparation method for the iron-based catalyst, and mainly solves the problems in the prior art that Fischer-Tropsch synthesis reaction is strong exothermic reaction, so that when a static bed is used, heat removal is difficult and temperature runaway is easily caused in a reactor; the catalyst is easily inactivated; and the weight selectivity of the low-carbon olefin is low. The catalyst adopted in the invention comprises the following active components containing a composition with a chemical formula of Fe100AaBbOx in atomic ratio, wherein A is selected from one of Ti or Zr; and B is selected from one of alkali metals, so that the above problems are well solved. The iron-based catalyst can be applied to industrial production of preparing the low-carbon olefin directly from the synthesis gas.

The invention discloses a hydrotreating method for heavy hydrocarbon raw materials. According to the invention, a fixed bed hydrogenation reactor is employed; at least two catalyst beds are arranged in the fixed bed hydrogenation reactor; a solvent is introduced at least from one gap formed by two adjacent catalyst beds and is mixed with reacting materials, and light components are extracted; the light components are introduced out from the reactor in an extraction and separation area between two adjacent catalyst beds, and heavy components enter into next catalyst bed for further reaction; extracted oil can directly enter into a gasoline/diesel hydrogenation device so as to obtain qualified gasoline/diesel and can also enter into an FCC main fractionating column for fractionation so as to obtain a crude product which enters into the gasoline/diesel hydrogenation device so as to obtain qualified gasoline/diesel. The method provided in the invention can effectively reduce pressure drop of beds in fixed bed hydrotreatment, prolong the service life of a catalyst, improve a total conversion rate of a fixed bed hydrogenation apparatus and enhance treating capacity of an apparatus under the condition of a same conversion rate, thereby creating greater benefits for an enterprise.

The invention provides a microwave oven which comprises an outer cover, an enclosure plate, an upper cover, an inner container, a heating device and a control device. The enclosure plate is arranged on an upper plate of the inner container and supported between a top plate and the upper plate of the outer cover. A heating cavity is defined by the enclosure plate, the upper plate and the top plate. The heating device is arranged in the heating cavity. The upper cover covers the top plate to form a heat preservation cavity. The control device is used for controlling starting/stopping of the heating device to make the temperature in the heat preservation cavity or of the top plate keep in the preset temperature range. According to the microwave oven, the heat preservation cavity is defined by the upper cover and the top plate, the top plate is heated when the heating device works, the temperature in the heat preservation cavity rises, and thus heat preservation is conducted on the food in the heat preservation cavity accordingly; when the heating device stops working, the upper cover can be taken down. The microwave oven is simple in structure, the external space is utilized, and the size of the microwave oven is reduced; furthermore, the food in the heat preservation cavity is kept in the heat preservation range through the control device, and the heat preservation effect of the microwave oven is improved.

The invention relates to a fuel cell cooling circulation water tank heating device comprising a fuel cell system and also comprises a circulation water tank heating system which comprise a heating control management unit, an electrical heated tube, a high-voltage contactor and a temperature sensor, wherein the heating control management unit is connected with the high-voltage contactor, carries out data exchange with the control unit of the fuel cell system and is connected with the temperature sensor; the electrical heated tube is arranged in a circulation water tank; the electrical connecting line of the electrical heated tube is led out of the circulation water tank and is connected with the load line of a fuel cell through the high-voltage contactor; and the temperature sensor is arranged in the circulation water tank. The invention has the advantages that the preheating time of the fuel cell is shortened to make the fuel cell rapidly enter the best working state; the heating device is arranged in the water tank, thus, the water holding space is big and the local overheating is not easy to generate; the device has multiple protection and is safe and reliable; the electrical heated tube with different resistance can be selected according to different power generation output of the fuel cell, thus the device has wide the range of application. The device has simple function and great significance and is convenient to implement.

The invention provides a supported cobalt-based catalyst for Fischer-Tropsch synthesis. The supported cobalt-based catalyst is composed of cobaltosic oxide, an oxide of a precious-metal aid, an oxide of a non-precious-metal aid and a tungsten carbide carrier in a weight ratio of (10-80): (0-3): (0-20): 100. The supported cobalt-based catalyst has the advantages of high mechanical strength and good thermal conductivity.

A solar luminous spike lamp and a control method thereof are provided; LED light sources (2), a power storage element (4) and a photovoltaic device (5) are connected to a control circuit (3) respectively through circuits; a shell (1) integrally packages the LED light sources (2), the control circuit (3), the power storage element (4) and the photovoltaic device (5) through a packaging material (6); the LED light sources (3) emitting light from inside to outside along light-permeable windows are arranged below at least one of the light-permeable windows. Light can be emitted continuously at thepremise of ensuring moderate flashing, the dynamic light emission with moderate flashing is guaranteed, and negative effects of flashing are decreased; LEDs of same or different main emitting wavelengths or packaging manners are provided so that spike lamp identification degree is increased; dazzling effect is relieved as gradient light emission is provided. Since improved performance and extended functionality are achieved, the solar luminous spike lamp can be mounted on a pavement and can also be combined to other traffic safety facilities and can evenly be used as an energy-saving lightingproduct; therefore, the solar luminous spike lamp has a wider range of application.

The invention discloses a noise-reducing saw blade for timber cutting. The noise-reducing saw blade comprises a copper core plate, a plurality of air holes are formed in the outer circumference of thecopper core plate, cutting disks are arranged on two sides of the copper core plate and provided with fixing holes penetrating the copper core plate, the outer edges of the cutting disks extend outwards to go beyond the outer edge of the copper core plate, a plurality of rubber posts surrounding the copper core plate are arranged between the two cutting disks, flared elastic bodies are arranged at two ends of the rubber posts, threaded rods are arranged in the rubber posts, the two cutting disks are fixed to two ends of the threaded rods and are connected with the copper core plate through pins penetrating a plurality of surrounding fixing holes, a plurality of saw teeth are arranged on the outer circumferential faces of the cutting disks, 10-15 saw teeth are designed in a group, an inwardly extending noise-reducing seam is formed in the root of one of each saw tooth group, and noise-reducing pillars are inlaid into the ends of the noise-reducing seams. The noise-reducing saw blade for timber cutting is not prone to being overheated and causing fire and long in service life without sharp noise.

The invention relates to an intelligent teaching rostrum. The teaching rostrum comprises a rostrum body arranged on the ground; a camera arranged on the table-board of the rostrum body; a control panel fixed on the table-board of the rostrum body; a time recorder arranged on the table-board of the rostrum body; a memorizer arranged in the rostrum body and connected with the camera and the time recorders; a processor arranged in the rostrum body and vertically corresponding to the memorizer, and connected with the memorizer and used for processing data; and a display terminal connected with theprocessor and used for playing the data transmitted from the process in a video or audio way. The intelligent teaching rostrum disclosed by the invention is small in floor space and hard to overheatin the use; and the fault is hard to occur, the class atmosphere cannot be damaged, and the course can be performed in order.

The invention relates to a catalyst for preparing low-carbon olefins from synthesis gas and a preparation method thereof. The catalyst for preparing the low-carbon olefins from the synthesis gas and the preparation method thereof mainly solve the problems that in the prior art, because the Fischer-Tropsch synthesis reaction is a strong exothermic reaction, in the process of using a fixed bed, heat is difficult to remove in a reactor, temperature runaway is easy, the catalyst tends to be inactive and the weight selectivity of the low-carbon olefins is low. According to the technical scheme, the catalyst adopted by the method comprises, in terms of atomic ratio, a composition with a chemical formula being Fe100MnaBbCcOx, wherein B is selected from at least one of Ga and In, and C is selected from at least one of Rh and Ir. The problems can be well solved through adopting the above technical scheme, and the catalyst can be applied to industrial production of preparing the low-carbon olefins from the synthesis gas through a one-step method.

The invention discloses a heat insulation dining car. According to the heat insulation dining car, a heat pipe is arranged in a vehicle box body and comprises a heating section and an isothermal section, the heating section and the isothermal section form a sealed loop, a steam heating pipe is arranged in the heating section, and the outer portion of the heating section is covered with an electric heating ring. The heat insulation dining car is simple in structure, works reliably, is small in overhaul amount and can improve heat transfer efficiency and heating speed, heat is released slowly, isothermality of the dining car is guaranteed, heat insulation time of the dining car is greatly improved, and the dining car does not overheat easily.

A device and method for preparing an anhydrous lower alcohol mixture by using synthesis by-product light alcohols are provided. The device includes a pervaporation membrane dehydration unit, a hydrogenation unit, and an adsorption and dehydration unit which are connected in sequence through pipes, wherein the pervaporation membrane dehydration unit includes a pre-dehydration column, a raw materialheater, and a pervaporation membrane dehydrator which are connected in sequence through pipes; the hydrogenation unit includes a hydrogenated raw material heater, a hydrogenation reactor, and a hydrogenated gas-liquid separator which are connected in sequence through pipes. The adsorption and dehydration unit includes a hydrogenated light alcohol heater and an adsorption column connected in sequence through pipes. The device and method can effectively reduce the content of water and non-alcoholic oxygen-containing organic compounds in the lower alcohol mixture and improve product quality.

A device and method for preparing an anhydrous lower alcohol mixture by using Fischer-Tropsch synthesis by-product light alcohols are disclosed. The device includes a pervaporation membrane dehydration unit, a hydrogenation unit, and an adsorption and dehydration unit which are connected in sequence through pipelines, wherein the pervaporation membrane dehydration unit includes a raw material heater and a pervaporation membrane dehydrator which are connected in sequence through pipelines; the hydrogenation unit includes a hydrogenation raw material heater, a hydrogenation reactor, and a hydrogenated gas-liquid separator which are connected in sequence through pipelines; the adsorption and dehydration unit includes a hydrogenated light alcohol heater and an adsorption column which are sequentially connected through pipelines. The device and the method can effectively reduce the content of water and non-alcoholic oxygen-containing organic compounds in the lower alcohol mixture and improve product quality.