50results about How to "Solve the problem of thermal expansion" patented technology

The invention discloses a micro chromatographic column tank which comprises a tank body, capillary column heating frame set in the tank, capillary column bound around the frame, a heating device set on the inner wall of the frame, a precise thermo resistor and a temperature control system set out of the tank. The capillary column heating frame employs metal alloy material; the capillary column employs quartz material; the heating device is flexible electrical heating membrane coated on the inner wall of the frame; the temperature control system includes a temperature control module, the precise thermo resistor connects with the signal input terminal of the temperature control module, the output terminal of the temperature control module connects with the insulating single-phase alternative current modulator module of which one end of the output terminal connects with the heating device, and the other end of the output terminal connects with the input power.

The invention relates to microwave high-temperature heating equipment, in particular to a microwave high-temperature continuous tunnel kiln. The microwave high-temperature continuous tunnel kiln comprises two bracketsarranged in parallel, an inlet-end turning device and an outlet-end turning devicewhich are arranged at the two end parts of the bracket structure respectively, kiln car traveling guide rails arranged on the brackets, a kiln car, a tunnel kiln body arranged on one bracket, a charging device and a discharging device which are arranged on another bracket, and a feeding hole inhibitor and a discharging hole inhibitor which are arranged at the two end parts of the tunnel kiln body, wherein the tunnel kiln body comprises a housing, a heat preservation layer arranged in the housing, a microwave resonance cavity body formed in the inner wall surface of the heat preservation layer, a temperature measurement device and a microwave source assembly. The microwave high-temperature continuous tunnel kiln has the advantages that the structure is compact, the automation level is high, the heating speed is high, the temperature difference of materials is low, automatic charging, discharging and heating are realized, the working environment is improved, the labor intensity is reduced, the working efficiency is improved, and the continuous material production is achieved.

The invention discloses an energy-saving heating network heater which belongs to heat exchangers. The structure of the energy-saving heating network heater comprises a housing, a front end channel, a back end channel and a pipe bundle. The upper portion and the lower portion of the housing are respectively provided with a steam cushioning jacket and a lyophobic storage jacket. A steam inlet pipe is arranged at the upper portion of the steam cushioning jacket; and a lyophobic outlet pipe is arranged at the lower portion of the lyophobic storage jacket. A scour-prevention plate is arranged at the lower portion of the steam inlet pipe. A split-ranging partitioning plate is arranged in the middle of the front end channel. The pipe bundle comprises a pipe plate, a support plate, a pull rod and heat-exchanging pipes. A plurality of heat-exchanging pipes is entirely distributed all over the pipe plate. An expansion joint is arranged between the housing and the back end channel. A steam stop plate is arranged inside the expansion joint. By entirely distributing the heat-exchanging pipes all over the pipe plate, the steam is prevented from directly contacting with the condensed water, and accordingly the heat-exchanging area is increased, the temperature of the condensed water is low, thereby saving the energy source. The energy-saving heating network heater is characterized in reducing the flow speed at the steam inlet, avoiding the damage to the equipment, reducing the operation noise, and being good in heat transfer effect, or the like.

The invention discloses a support system of a steam turbine generator unit. The support system at least comprises a bedplate and a support seat, wherein the bedplate and the support seat are used for supporting the steam turbine generator unit, the support seat comprises a vibration isolation unit and a sliding unit which is located above the vibration isolation unit, the sliding unit comprises a sliding body bracket and a sliding body which is located on the bracket, the bedplate of the steam turbine generator unit is directly put on the sliding body, the sliding body bracket comprises a bottom plate and a side baffle which is perpendicular to the bottom plate and forms a sealed shape in a horizontal direction, the sliding body is located in the side baffle, and the vertical height of the sliding body is larger than the side baffle. The support system can bear the load of the steam turbine generator unit and absorb the vibration of the steam turbine generator unit and can also absorb thermal displacement in horizontal directions (X,Y) and a vertical direction (Z), the problems of thermal expansion and stress of a pipeline system for connecting a boiler with the steam turbine generator unit are solved, and the short-distance connection of the pipeline system between the boiler and the steam turbine generator unit is realized.

The invention relates to a third-level cyclone separator with large handling capacity, which is mainly used in an energy recycling system of a catalytic cracking unit for refining petroleum for gas-solid separation. The separator comprise a housing, a smoke outlet, a smoke inlet, a center tube, a plurality of single cyclone separators, a hanging clapboard and the like, wherein, the internal part of the housing is divided into three relatively independent spaces of an air inlet chamber, an air collecting chamber and a dust collecting chamber; a plurality of single cyclone separators are arranged in the housing in a double-ring double-layer mode; a plurality of single cyclone separators are arranged and installed in the housing according to inner and outer rings and upper and lower layers; the arrangement ensures that each cyclone separator can keep optimum pressure balance and even distribution of air quantity so as to effectively ensure device operation stability and safe running in long period; in a plane space and vertical space which are as small as possible, the cyclone separators with large handling capacity and favorable performance are arranged as much as possible, which solves the problems of loading and thermal expansion and reduces equipment investment.

The high temperature energy saving steel pipe type air pre-heater includes casing; and return pipe bundle comprising low temperature pipe header, low temperature pipe bundle, middle pipe header, high temperature pipe bundle and high temperature pipe header. The low temperature pipe bundle has upper pipe ends connected to the low temperature pipe header; the high temperature pipe bundle has upper pipe ends connected to the high temperature pipe header; both the high temperature pipe bundle and the low temperature pipe bundle have their lower pipe ends connected to the middle pipe heater, and the said five parts constitute out U-shape. The return pipe bundle has upper part connected to the top of the casing and lower part suspended; and the caisng has right and left flue inlet and outlet and upper part as return pipe bundl installing port and air inlet and outlet. When fume temperature changes, the pipe bundles and the middle pipe header may change their length freely.

The invention discloses an antiseptic processing method for a capping part of a brick lining chimney, which comprises the following steps: washing a capping area at the chimney top with high-pressure water to remove impurities; repairing gaps of capping concrete bricks or locally leveling and drying; spraying, blade-coating, brush-coating or roller-coating a polyfluorine organic lining antiseptic material layer on the capping surface; and finally maintaining. In the method, antiseptic processing targeting an expansion joint part is performed by using elastic material, thereby solving the problems of leak tightness and thermal expansion at the same time. The method can perfectly eliminate thermal stress generated by fluctuation of smoke temperature, cannot damage the antiseptic layer and eradicates leakage of condensate.

The present invention relates to pre-treating apparatus and process for composite metal base material. The pre-treating apparatus includes one combined portal frame, heating guide rollers, one guide unit, one energy accumulator, one air blowing unit, heat collecting boxes and one hot blast circulator. During pre-treatment, the composite metal base material is made to pass through the heating guide rollers and the boxes separately in specific temperatures successively in certain linear speed. The present invention has the composite metal base material possess homogeneous heating, less heat deformation and no destruction of mechanical performance.

The invention provides a corrosion-resistant treatment method of a corbel part of a brick lining chimney. The method comprises the following steps of: firstly cleaning a substrate; then digging a corbel joint seam, wherein the depth of the seam is larger than or equal to 100mm; pouring the seam by using polyurethane sealing cream and silicon rubber type high-temperature elastic adhesive sealing material; then coating polyfluorine organic lining corrosion-resistant material at the upper and lower sides of the seam, and building vitrified ceramic tiles for protection; if a drainboard exists, performing sloping processing on the drainboard; and maintaining according to the maintaining conditions of the material. The method employs the elastic materials to perform corrosion-resistant processing on the chimney corbel at the retractable seam part of the corbel, so as to excellently and simultaneously solve the problems of sealing performance and thermal swelling. According to the method of the invention, the thermal stress generated through smoke temperature waving is excellently eliminated; the corrosion-resistant layer is prevented from being corroded, and the leakage of condensate can be avoided.

The invention discloses an airtight external thermal type rotary furnace with same-side feed and discharge functions. The airtight external thermal type rotary furnace comprises a furnace and three jackets. The jackets are arranged on the outer wall of the furnace, and a support wheel device for supporting the furnace is arranged between the jackets; an inner cavity of the furnace is provided withtube bundles which are axially distributed along the furnace, independent heat-carrying gas channels inside the furnace are formed by tube nest air inlet jackets and tube nest air outlet jackets in the three jackets and the tube bundles, and independent heat-carrying gas channels outside the furnace are formed by intermediate jackets and the outer wall of the furnace; the various jackets are sealed by flexible jacket seals; a gas outlet device and power mechanisms are arranged at the front of the furnace, the furnace can be in linkage with the power mechanisms to rotate, feed and discharge devices which are arranged on the same side are arranged at the tail of the furnace, and sealing structures are arranged on the furnace and are positioned on the gas outlet device and the feed and discharge devices. The airtight external thermal type rotary furnace has the advantages that materials in the furnace can be simultaneously indirectly heated by the heat-carrying gas channels formed by thetube bundles inside the furnace and the external jackets and accordingly can be efficiently heated; environmental pollution and energy consumption can be reduced by equipment, the heat exchange efficiency can be improved, and the operation safety of the equipment can be guaranteed.

The invention relates to a special vertical lower cantilever hollow screw rod vacuum pump for pharmaceutical chemical engineering. The screw rod vacuum pump comprises a pump shell, an upper bearing box, a lower bearing box, a driving screw rod, a driven screw rod and a motor; the lower bearing box is arranged between the pump shell and the upper bearing box; spiral rotors of the driving screw rod and the driven screw rod are vertically arranged in a pump cavity side by side; shaft rods of the driving screw rod and the driven screw rod penetrate in a cavity formed by closing the lower bearing box and the upper bearing box up and down; synchronous gears engaged with each other are respectively mounted on the shaft rods of the driving screw rod and the driven screw rod; a gear transmission mechanism is arranged in the upper bearing box; a motor is mounted on the upper bearing box; and the gear transmission mechanism is respectively engaged with a driving gear on a main shaft of the motor and the synchronous gear on the driving screw rod. The screw rod vacuum pump realizes support of a lower cantilever structure by single end of screw rods, and enables a working airflow direction to be consistent with a gravity direction, so that such impurities as dust entering the pump cavity are easy to be discharged from an exhaust port in the lower part of the pump shell along with suction of working airflow of the vacuum pump, the blockage is eliminated, and the cleaning of the pump cavity is convenient.

The invention discloses a ceramic shell dewaxing method. The method includes the steps that (1) before a ceramic shell with a wax mould enters a dewaxing procedure, a heat resisting layer which differs from thin to thick is disposed outside the ceramic shell with a dewaxing opening serving as the starting point; (2) the ceramic shell with the wax mould and the heat resisting layer are put in dewaxing equipment, the dewaxing opening in the ceramic shell faces downwards, the thinnest area of the heat resisting layer outside the ceramic shell is located in the undermost position in the vertical direction, and the thickest area of the heat resisting layer is located in the uppermost position in the vertical direction; and (3) after the ceramic shell with the wax mould and the heat resisting layer enters the dewaxing procedure, the heat resisting layer outside the ceramic shell controls the wax mould in the ceramic shell from bottom to top to gradually change and absorb dewaxing heat, the wax mould in the ceramic shell uses the dewaxing opening as the melting starting point, and sequential dewaxing is achieved from outside to inside and from bottom to top. By means of the ceramic shelldewaxing method, auxiliary dewaxing openings in the ceramic shell can be reduced or directly omitted, and the qualified rate and quality of dewaxing and forming of the ceramic shell can be guaranteedeffectively and reliably.

The invention provides a driving mechanism support structure and a control rod driving wire. The driving mechanism support structure comprises a bearing piece, a supporting ring, a ring supporting piece and a lower end hole shrinkage piece, a supporting part is arranged on the inner wall of the annular supporting piece, the lower side of the supporting ring abuts against the supporting part, the upper side of the supporting ring abuts against the bearing piece, the lower portion of the bearing piece penetrates through a center hole of the supporting ring and is detachably connected with the upper end of the driving mechanism, and the upper end of the bearing piece abuts against a component which is arranged in the guide cylinder and is axially fixed, the upper end of the lower-end hole shrinkage piece is fixedly connected with the guide cylinder, the lower end is mounted on the reactor core supporting plate, the lower-end hole shrinkage piece sleeves the outer side of the lower end ofthe driving mechanism, and a gap is formed between the lower-end hole shrinkage piece and the lower end of the driving mechanism. Enough space is reserved for operation of the water pressure cylinderand the pin claw mechanism, the problem that the water pressure cylinder and the pin claw mechanism are unreasonable in stress in the working state is solved, a water diversion pipe of the driving mechanism is not interfered, and the performance and reliability of the driving mechanism are improved.

The invention relates to a technology for white synchronous railroad, which uses a glabrous white heat isolation layer to be coated on a railroad. A sleeper, in particular a steel sleeper, is coated with the glabrous white heat isolation layer, thereby substantially shortening the range of temperature change of the railroad, realizing the synchronous thermal expansion between the railroad and a roadbed, just like the synchronous thermal expansion between steel reinforcement and concrete in reinforced concrete, and completely solving the problem of the thermal expansion of the railroad.

The invention discloses a vertical type angular-tube type bubbling bed boiler comprising a boiler bottom support seat formed by a plurality of lower collecting boxes and middle connecting tubes. A boiler body defined by a film-type water cooling wall is placed on the boiler bottom support seat, and a steam drum is arranged above the boiler body and supported by falling tubes arranged outside the boiler body. The upper ends of the falling tubes communicate with the steam drum, and the lower ends of the falling tubes communicate with the lower connecting boxes. The lower connecting boxes communicate with an upper connecting box through the film-type water cooling wall, and the upper connecting box communicates with the steam drum. A partition plate is arranged in the boiler body, the film-type water cooling wall of a front cavity is provided with a feeding port, and the film-type water cooling wall of the bottom of the front cavity is provided with a plurality of air inlets. A superheater and an evaporator are arranged in a rear cavity, the superheater communicates with the steam drum, and the evaporator communicates with the film-type water cooling wall of the rear side of the rearcavity. The film-type water cooling wall of the rear cavity is provided with a smoke outlet communicating with an economizer of the exterior of the boiler body, and the economizer communicates with the steam drum. The vertical type angular-tube type bubbling bed boiler has the advantages that the combustion efficiency is high, and the occupied area is small.

The invention relates to a novel heat preserving layer structure. The novel heat preserving layer structure comprises a screw, a T-shaped vacuum main rib, a heat preserving container wall, a vacuum heat insulating layer, a heat preserving layer, bolts, nuts and a protective reflecting layer. The heat preserving layer is connected with the heat preserving container wall through the T-shaped vacuum main rib, and the T-shaped vacuum main rib is connected with the heat preserving layer through special bolts, so that convenience is brought to maintenance and overhauling; through design of the special bolts, creepage is prevented; vacuum pumping is performed between the heat preserving layer and the container wall, so that a good heat preserving effect is achieved; through the protective reflecting layer made of an iron sheet, the heat preserving layer can be protected, and external radiation loss can be reduced; the heat preserving layer is filled with a foam polymer, so that a remarkable heat insulating effect and outstanding economical benefit are achieved.

The invention discloses a blast furnace slag replacement method for high-fill steel slag foundation, which comprises the following steps of: superimposing a first blast furnace slag cushion layer (1), a graded gravel cushion layer (2) and a second blast furnace slag cushion layer (3) sequentially from bottom to top in a steel slag foundation pit, respectively compacting the first blast furnace slag cushion layer, the graded gravel cushion layer and the second blast furnace slag cushion layer, setting up a through groove around the first blast furnace slag cushion layer, the graded gravel cushion layer and the second blast furnace slag cushion layer, and filling blast furnace slag into the groove. By adopting the blast furnace slag replacement method, the problem of thermal expansion of the high-fill steel slag foundation can be solved. The invention has the advantages that the method can be easily mastered and has practicality, the quality requirements can be satisfied, the construction period can be shortened, and the construction cost can be reduced. Therefore, the method has good promotion prospects.