76results about How to "Good regulation characteristics" patented technology

A gas-liquid contact tray with fixed valves for mass transfer, in which the fixed valve comprising an upstream portion, a midportion and a downstream portion is made by punch from the tray deck so as to form as a deflector, and the upstream portion and the downstream portion are integrated with the tray deck, characterized in that said midportion has a central plane portion and downward inclined margins, and the tray deck is further provided with perforations which are arranged between the fixed valves adjacent in the liquid flow direction. The gas-liquid contact tray with fixed valves for mass transfer according to the present invention has a low liquid entrainment, low liquid weeping, a high mass transfer capacity and good turn-down characteristics.

The invention relates to a branch control phase inversion heat exchange system and a branch control phase inversion heat exchange method based on a vapor-liquid heat exchanger. The system comprises a liquid storage tank (20), a heat source heat exchanger (3), a cold source heat exchanger (15) and a vapor-liquid heat exchanger (9); an upper collection tank of the heat source heat exchanger (3) is communicated with the vapor-liquid heat exchanger (9) through a heat exchanger inlet steam pipe (8); a vapor-liquid heat exchanger outlet steam pipe (10) which is arranged on the vapor-liquid heat exchanger (9) is divided into two branches which are communicated with an upper collection tank and a lower collection tank of the cold source heat exchanger (15); the lower collection tank of the cold source heat exchanger (15) is communicated with the upper part of the liquid storage tank (20) through a cold source heat exchanger liquid outlet pipe (17); the bottom of the liquid storage tank (20) is communicated with the vapor-liquid heat exchanger (9) through a heat exchanger inlet condensation liquid pipe (11); and the vapor-liquid heat exchanger (9) is communicated with a lower collection tank of the heat source heat exchanger (3) through a heat exchanger outlet condensation liquid pipe (6). The branch control phase inversion heat exchange system can solve the phenomena of overcooling and overheating and improve heat exchanging efficiency.

The invention relates to a high-efficiency, sub-control and phase-change heat exchange system. The heat exchange system provided by the invention comprises a heat exchanger of heat source (3) and a heat exchanger of cold source (12) which are mutually communicated through a steam tube and a condensate line to from a sub-control and phase-change heat exchange circuit. The heat exchange circuit is provided with an air flow regulating valve and a liquid flow regulating valve which can control the circuit. A reservoir tank (16) is configured on the condensate line. The header of the steam tube on the top of the heat exchanger of heat source (3) is divided into two steam sub-tubes. A first steam sub-tube is connected with the heat exchanger of heat source (12) and an air flow regulating valve (11) is configured between the first steam sub-tube and the heat exchanger of cold source (12). A second steam tube communicates with the reservoir tank (16) via a condensate heater (18) configured inside the reservoir tank (16). A liquid distribution tube (6) is configured inside the collecting chamber (7) of the heat exchanger of heat source (3), and a plurality of sprayers are configured on the liquid distribution pipe which is used for the mixing heat exchange of steam and condensate. The efficiency of the system provided by the invention is much higher.

The invention provides a back-gate field effect transistor based on contact electrification. The back-gate field effect transistor comprises the components of a conductive substrate; an insulating layer which is formed on the front surface of the conductive substrate; a field effect transistor assembly which comprises a channel layer, a drain electrode, a source electrode and a gate electrode; and a friction electrification assembly. The friction electrification assembly comprises the components of a static friction layer which is formed on the lower surface of the gate electrode; a movable friction layer which is separated from the static friction layer and is arranged parallelly with the static friction layer; and a second conductive layer which is formed outside the movable friction layer and is electrically connected with the source electrode, wherein the static friction layer and the movable friction layer are arranged at different positions of a friction electrode set. In response to the function of an external force, the static friction layer and the movable friction layer can be repeatedly switched between a separating state and a contacting state. According to the back-gate field effect transistor, an electrostatic potential which is generated by a friction electrification machine is used as a gate electrode gate signal of the back-gate field effect transistor, thereby realizing control for transportation characteristic of carriers in a semiconductor.

The invention relates to a branch-control and phase-change heat exchange system and method based on a two-stage steam-liquid heat exchanger. The system comprises a heat source heat exchanger (2), a cold source heat exchanger (20) and a low temperature liquid tank (23), and the system further comprises a high temperature heat exchanger (14), a low temperature heat exchanger (22) and a high temperature liquid tank (8); a main heat source steam pipe at the top part of the heat source heat exchanger (2) is divided into two branch pipes after passing through a heat source steam exhaust adjusting valve (16), the two branches are respectively communicated with an upper collection tank and a lower collection tank of the cold source heat exchanger (20), and control systems are respectively arranged on the branches; the low temperature liquid tank (23) is communicated with the high temperature heat exchanger (14) through a condensate pipeline, the bottom of the high temperature heat exchanger (14) is communicated with the high temperature liquid tank (8) through a condensate pipeline, and the condensate pipeline at the bottom of the high temperature liquid tank (8) is respectively communicated with the low temperature heat exchanger (22) and the heat source heat exchanger (2). According to the branch-control and phase-change heat exchange system disclosed by the invention, overheat and over-cold phenomenon of steam and condensate are solved, and the heat exchange efficiency is further improved.

The invention relates to a control method and system for hydraulic disorders of a cold/heat supply pipe network. The method comprises the steps that a hydraulic simulation model of a cold/heat supplypipe network system is set up; the flow distribution scheme of users is confirmed; according to the flow distribution scheme of the users, the hydraulic conditions of the users are calculated throughthe running historical data of the users; according to the hydraulic conditions of the users, primary hydraulic adjustment is carried out on the pipe network through the model analysis method; according to the historical temperature records of the old/heat supply pipe network system, the artificial neural network is adopted for predicating outdoor temperature; according to the outdoor predicated temperature, models are set up for different running adjusting manners to be compared and calculated; according to the calculation result, the corresponding running adjusting manners are selected, andthe pipe network system obtained after primary hydraulic adjustment is adjusted secondarily; and hydraulic condition inspection is carried out on the pipe network system obtained after secondary adjustment. According to the method, on the premise of achieving hydraulic balance of the cold/heat supply pipe network, hydraulic balance adjustment can be completed within a short time after the cold/heat supply system is put into operation.

The invention relates to a low-temperature co-fired ceramic dielectric material and a preparation method thereof. The LTCC dielectric material comprises an oxide dielectric material having a high sintering temperature and an oxide activator, and the LTCC dielectric material concretely comprises 1-20 wt% of the oxide activator, and the balance of the oxide dielectric material having the high sintering temperature; the oxide dielectric material with the high sintering temperature is an oxide of M, wherein M is at least one of Mg, Al, Ti, Ca, Zr, Nd, MgTi, MgAl, CaTi and NdAl; and the oxide activator comprises an oxide of A and an oxide of B, A is at least one of Zn, Cu, Mn, Sn, Fe, Co and Ni, B is at least one of V, Nb, Ta, Ti and Si, and the mass of the oxide of A is 10-100% of the total mass of the oxide activator.

The invention discloses an airbag type ventilation and drainage positive and negative pressure water hammer control valve group. The airbag type ventilation and drainage positive and negative pressure water hammer control valve group is arranged on an infusion pipeline or a container system and comprises a water hammer relief valve, a trace exhaust valve, a high-speed exhaust valve, a rear regulating valve, a negative pressure air suction valve, a manual venting and draining valve and a monitoring pressure gauge; the rear regulating valve is arranged at the outlet end of the high-speed exhaust valve; the water hammer relief valve is directly connected with the top or the lateral side of the negative pressure air suction valve through threads or a flange; the trace exhaust valve is connected with a hole which is formed in the front of the water hammer relief valve; the high-speed exhaust valve is directly connected with the top or the lateral side of the negative pressure air suction valve through threads or a flange; the negative pressure air suction valve is connected with the external infusion pipeline. According to the airbag type ventilation and drainage positive and negative pressure water hammer control valve group which is integrated and omni-directional, the structure is compact and firm, the conveying and the installation are convenient, the reliability is strong, the positive pressure water hammer can be relieved, the relief speed is high, and the water hammer of cavities collapsing due to the negative pressure can be inhibited.

The invention relates to a flow-volume regulator having a regulator housing which has at least one regulator ring channel which contains an annular flow restrictor made of elastic material which bounds, between itself and a channel wall that bears a regulatory profiling, a control gap for which it is possible to alter the passage cross section by means of the flow restrictor, which deforms under the pressure difference that forms during the flow, and also having at least one valve which has a valve body which moves under the pressure of the flowing medium from an open position counter to a restoring force into a closed position, in which closed position the valve body closes off at least one valve opening. In order to be able to make the flow-volume regulator according to the invention compact and also to mount it in space-saving fashion under confined circumstances, the invention provides for the valve body to be provided in a valve ring channel in the regulator housing which valve ring channel has at least one valve opening in the region of its channel base, for the valve body to be of annular design and to made from elastic material, and for the annular valve body to deform under the pressure of the flowing medium such that the valve body moves from the open position counter to the restoring force of the inherent elasticity of the elastic material used for the valve body into the closed position.

The invention discloses a manufacturing method of a trench-gate superjunction device. The manufacturing method comprises the steps of 1, forming a trench gate, wherein the step 1 comprises the steps of 11, forming a gate groove in a first epitaxial layer in which a superjunction structure is not formed; 12, forming a gate oxide layer, and rounding a bottom angle and a top angle of the gate grooveby a thermal oxidization process of the gate oxide layer; and 13, forming a poly-silicon gate; and 2, forming the superjunction structure, wherein the step 2 comprises the steps of 21, forming a superjunction post groove; and 22, filling a second epitaxial layer in the superjunction post groove to form a second conductive type of post of the superjunction structure, wherein the first conductive type of post of the superjunction structure comprises the first epitaxial layer between the superjunction grooves. By the manufacturing method, the electric leakage of the device can be reduced, the reliability of the device is improved, and meanwhile, the specific conduction resistance of the device also can be reduced.

A helical antenna capable of operating at a plurality of different resonant frequencies. The helical antenna has a first helical antenna element, a second helical antenna element arranged coaxially with the first helical antenna element and coupled to the first helical antenna element through capacitive coupling, and a metal connection directly connected only to the first helical antenna element to fed the helical antenna. The first helical antenna element is fed through one end thereof to function as a quarter-wave antenna. The second helical antenna element is fed through capacitive coupling to function as a half-wave antenna.

The invention relates to a preparation method of a short-peptide/silicon dioxide/hydroxyapatite porous composite material, belonging to the technical field of preparation of biological composite materials. The short-peptide/silicon dioxide/hydroxyapatite porous composite material can be used as a bone-repairing three-dimensional scaffold material, has good biological activity, mechanical property and degradation characteristic, and is beneficial to improvement of the bone repairing effect. The preparation method comprises the steps of dissolving short-peptide molecules into water for assembly; mixing the assembled short-peptide solution, a silicon precursor and an adhesive, and reacting to form short-peptide/silicon dioxide gel; replacing the gel by using ultra-pure water and then freezing a sample by using a condensation induction method and carrying out freeze-drying to obtain a short-peptide/silicon dioxide porous material; soaking the material by using simulated body fluid, and carrying out freeze-drying to obtain the short-peptide/silicon dioxide/hydroxyapatite porous composite material. The short-peptide/silicon dioxide/hydroxyapatite porous composite material is used for preparing an organic/inorganic porous composite material, has a hierarchical porous structure which is easy to regulate and control, and can be applied to the field of bone repairing as a three-dimensional scaffold of an artificial bone material.

A digital flow distribution and speed adjustment type low-speed axial plunger pump comprises a shell, an input shaft mechanism arranged in the shell, a return mechanism, five sets of plungers each provided with a high-speed electromagnetic switch valve, and corresponding flow pass structures, wherein the tail end of the input shaft mechanism is provided with an angle encoder connected with an electronic control unit, the five high-speed electromagnetic switch valves are controlled respectively through the electronic control unit, the input end of each high-speed electromagnetic switch valve is connected with a corresponding plunger cavity, and two output ends of each are connected with a low-voltage cavity and a high-voltage cavity respectively. By modifying the whole flow pass structure of the axial plunger pump, all friction pairs are lubricated with cold oil; a pump block is simple and compact in structure, energy conversion efficiency is high, and the service life is extended; in addition, the high-speed electromagnetic switch valves distributed at the plunger cavities are used herein to replace traditional flow distribution plates or flow distribution one-way valves, and easy-to-control digital flow distribution and speed adjustment mode under random low-speed input is formed.

An electric machine, especially a transversal flux machine, the stator being composed of a stack of phase segments, each phase segment having at least one stator segment and one stator winding, especially a single winding, each stator segment having an annular stator bridge, on which pole shoes are premolded, which in particular extend in the radially inward direction, and/or which extend in the direction of the rotor and/or which are situated between the rotor and the annular stator bridge, the pole shoes having the same shape, in particular, the axial width of the pole shoe decreasing with increasing radial clearance, the associated profile being disposed between a first and a second profile, the first profile being a linear function of the radial clearance, the pole back associated with the first profile being a planar area, in particular, the second profile being a circular function, in particular a circular segment function, the pole back associated with the second profile being a cylindrical section area, in particular.

The invention provides a desulfurization, denitrification and white smoke elimination device for ultralow emission of flue gas of a sintering machine and a process thereof. The device and the processare high in desulfurization, denitrification and dust removal efficiency and stable in long-term operation, reduce energy consumption and satisfy ultra-low emission requirements of sintering machinesand sintering agglomerates in the iron and steel industry. A double-tower device in a desulfurization system is subjected to desulfurization efficiency improvement and transformation, so that the ultra-low emission index of SO2 is achieved; a spiral-flow type efficient dust-removing demister and a wet type electric dust remover are arranged at the upper part of the secondary absorption tower, so that pollutants such as smoke dust, slurry fog drops, SO3 and heavy metals in the flue gas are effectively removed, and the ultralow emission index of the smoke dust is achieved; the denitration systemadopts a medium-low temperature SCR (Selective Catalytic Reduction) process, ammonia gas and NOx are subjected to a redox reaction under the action of a catalyst, NOx is reduced into N2 and H2O, andthe ultralow emission index of NOx is achieved.

The invention discloses a VAV system start up air flow balancing method. The method comprises the following steps: mounting a manual adjusting air valve at the position of a branch air duct of an inlet of each VAV terminal device; carrying out a debugging step before use, operating an air conditioning unit at industrial frequency, opening all the adjusting air valves of the VAV terminal devices on the premise of not receiving related instructions of temperature adjustment control, adjusting the manual adjusting air valves, and enabling the supply air volume of each VAV terminal device to be close to but not less than a design value; and carrying out a normal operating control step, running the air conditioning unit at the industrial frequency at first, opening all the adjusting air valves of the VAV terminal devices on the premise of not receiving the related instructions of temperature adjustment control, supplying air for the VAV terminal devices according to the supply air volume which is required to be distributed and obtained from the debugging step, when temperatures, which are detected by temperature sensors, of rooms corresponding to the VAV terminal devices reach the set temperature, receiving the related instructions of temperature adjustment control by using the adjusting air valves of the VAV terminal devices, adjusting the open degree values of the adjusting air valves, and meanwhile, receiving a frequency converting control instruction by using the air conditioning unit. By the VAV system start up air flow balancing method, a number of problems which exist in an existing VAV system can be solved, and the VAV system is easy to maintain in the later period.

The invention discloses a shell and tube type heat exchanger and a control method thereof. The shell and tube heat exchanger comprises a shell, a pipe box, a pipe plate and a heat exchange pipe, wherein the shell is provided with an inner cavity, the shell is provided with a shell pass inlet, a shell pass first outlet and a shell pass second outlet; the shell pass inlet and the shell pass first outlet are located at the two ends of the shell correspondingly, the pipe box is at least arranged at one end of the shell, the pipe box is provided with an inner cavity, a pipe pass inlet and a pipe pass outlet are formed in the pipe box, the pipe plate is located between the shell and the pipe box, the heat exchange pipe is arranged in the inner cavity of the shell, the heat exchange pipe penetrates through the pipe plate to communicate with the inner cavity of the pipe box, and the ratio of the shell pass length between the shell pass second outlet and the shell pass inlet accounts for the shell pass length between the shell pass first outlet and the shell pass inlet is 1/5-1/3. According to the scheme, the problems that when the pipe shell and tube heat exchanger is operated under the variable working condition, a cooling medium adjusting valve cannot be in the interval with excellent adjusting characteristics and accurate control of the outlet temperature of a cooled medium is difficult to be realized according to the working conditions are solved.

The invention provides a regulating valve molded line structure and a regulating valve adopting the same. The regulating valve molded line structure comprises a valve disc molded line and a valve seatmolded line, wherein the valve disc molded line is arranged on a valve disc, the valve disc molded line comprises a sealing section molded line, a flow control section molded line and a valve disc head molded line which are connected in sequence, The valve seat molded line is arranged on a valve seat, the flow control section molded line comprises a first tangent section molded line, an arc-shaped section molded line and a second tangent section molded line which are connected in sequence, the arc-shaped section molded line is provided with a first end point and a second end point, the firsttangent section molded line and the arc-shaped section molded line are tangent at the first end point, the second tangent section molded line and the arc-shaped section molded line are tangent at thesecond end point, the first tangent section molded line is connected with the sealing section molded line, and the second tangent section molded line is connected with the valve disc head molded line.The molded line structure has high flow adjusting precision under the working condition of small opening, and meanwhile it can be guaranteed that the molded line structure has high through-flow capacity under the working condition of full opening.

The invention relates to a single-row or multi-row heating member including at least two differently designed sections, in particular a flat heating member. The invention includes: an inflow linker (VL), a reflex linker (RL), a first section (1) that is flown over and is preferably toward to a chamber to be heated, and an another section (1') that is at least flown over and is preferably mounted in the back of the first section, wherein the first section is substantially and evenly flown before other sections, wherein at least one linker flowing to at least another section (1') is arranged in the lower end portion region of the first section (1).

The invention discloses a burning lance for a coal tar oxy-fuel control system. The burning lance comprises a lance core, a lance body, a lance shell and a connector which are sequentially arranged from inside to outside in a sleeving manner. Gaps are formed between every two of the lance core, the lance body and the lance shell. The lance body and the lance core extend out of the lance shell together. The lance core is provided with an axial through hole. By the adoption of the gas atomization technology, the atomization parameter matching is reasonable, so that the atomization grain size of coal tar is more fine and even, the good adjustment feature is achieved, and the atomization quality of the coal tar is improved; and oxy-fuel is adopted, the content of oxygen is increased greatly relative to that of air burning, dust in the coal tar is more fully burned, the problems that smoke is generated due to incomplete combustion of the coal tar is eliminated, and the phenomena that the coal tar is coked and blocks the gun are reduced remarkably.