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 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 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 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.