7results about How to "Smooth temperature change" patented technology

The invention discloses a sealing method for an optical fiber element, and relates to the technical field of optical element connection, in the sealing method, a pretreated assembly component is directly sealed under micro-positive pressure inert gas, and the sealing reliability can be improved from multiple aspects of oxidation prevention, atmosphere control, quality improvement, process stabilization and the like; the temperature of the graphite jig changes more gently in the heating and cooling stages, heat permeates uniformly in the heating process, and local thermal shock is avoided; and during cooling, heat is quickly and uniformly dissipated, so that the cooling rate difference of all parts of the sealing piece is reduced, and thermal stress accumulation is greatly reduced. In the sealing heating stage, the graphite jig can quickly and uniformly conduct heat of a heat source, the problem that a local area is overheated or heated insufficiently can be avoided, it is guaranteed that glass solder is synchronously melted and wetted on the whole sealing interface, the defects that the solder is uneven in spreading, local fusion is incomplete and the like due to the temperature gradient are overcome, and the service life of the glass solder is prolonged. And the air tightness and the structural integrity of a sealing interface are ensured.

The invention provides an end sealing and cooling structure for a plunger. The end sealing and cooling structure for the plunger comprises a sealing sleeve and the plunger arranged on the core portion of the sealing sleeve in a penetrating mode. A threaded sleeve, a water jacket, a three-stage sealing structure and a guide sleeve are sequentially arranged between the plunger and the sealing sleeve; annular cooling flow channels are formed between the water jacket and the plunger and between the water jacket and the sealing sleeve respectively. The annular cooling flow channels are communicated with a cooling medium inlet and a cooling medium outlet in the sealing sleeve. A pressure detection device is arranged on the quick-change connector at the cooling medium outlet; the three-stage sealing structure comprises three UN sealing rings and three supporting rings, and the UN sealing rings and the supporting rings are arranged at intervals; an annular groove is formed in the UN sealing ring, an annular protrusion is arranged on the supporting ring, and the annular protrusion is connected with the annular groove in an inserted mode. The problems that an existing sealing structure is prone to failure in the high-temperature and high-pressure environment, and sealing failure cannot be found in time are solved.

The application is suitable for supercritical technical field, and provides a primary frequency modulation control method, which comprises the following steps: designing a low-pass high filter and a high-pass low filter, decomposing a frequency signal, and obtaining low-frequency components and high-frequency components of the frequency signal respectively; sending the low-frequency components into a condensate water flow bypass valve controller, adjusting the bypass valve opening degree according to the low-frequency components; sending the low-frequency components into a low-level feedwater heater water level adjustment logic as a feedforward signal, and pre-judging and adjusting the low-level feedwater heater water level; sending the high-frequency components into a feedwater flow bypass valve controller, and adjusting the feedwater bypass valve opening degree according to the high-frequency components; and sending the high-frequency components into a high-level feedwater heater water level adjustment logic as a feedforward signal, and pre-judging and adjusting the high-level feedwater heater water level. By adjusting the water quantity on the high-level feedwater heater side, the steam side extraction quantity is changed, the temperature change is stable, and the stable operation of the unit is beneficial; the primary frequency modulation of the power grid is provided with an effective auxiliary means, and the frequency modulation precision and the frequency modulation response speed are improved.

The utility model relates to the technical field of polypeptide extraction, and discloses a polypeptide extraction device which comprises an extractor body, a feeding port formed in the top surface of the extractor body, a limiting ring attached to the outer side is arranged on the top surface of the extractor body, and an inlet closing assembly covering the feeding port is arranged in the limiting ring. And a detachable raw material freezing and thawing assembly is arranged on the limiting ring. The inlet closing assembly is arranged at the feed port of the extractor body, so that the feed port is accurately sealed, and pollution caused when the raw material freezing and thawing assembly is mounted and dismounted is avoided; the raw material freezing and thawing assembly is arranged at the feeding port, polypeptide raw materials can be subjected to freezing and thawing treatment and directly fed into the extractor body to be extracted, the pollution phenomenon is avoided, and daily maintenance is facilitated through the raw material freezing and thawing assembly which can be quickly disassembled.

The present application relates to the technical fields of laser welding, and discloses a laser welding device for track production, which comprises a rotating disc, and further comprises: welding assemblies, a plurality of which are evenly arranged in a ring shape on the top of the rotating disc and used for welding track components; heating blocks, a plurality of which are distributed along the welding assemblies and used for preheating the track components to be welded; and a circular ring arranged below the rotating disc and having a first limiting groove and a second limiting groove respectively formed on its inner and outer surfaces. The present application can preheat the track plates and the tooth blocks before welding, reduce the temperature difference, make the temperature change of the welding area more gentle, thereby reducing the occurrence of thermal stress and cracks, avoiding the rapid increase of the temperature of the welding area, the formation of large thermal stress leading to the generation of cracks, reducing the stress caused by the excessive temperature difference, improving the welding quality, and further improving the use effect of the device.

The utility model relates to the field of conveying equipment, in particular to an automatic bottle conveying machine which comprises a conveying belt, a secondary cooling mechanism is arranged on the conveying belt, a primary cooling mechanism is arranged at the feeding end of the conveying belt and comprises a temporary storage table, and first cooling air pipes are arranged on the periphery of the top of the temporary storage table. A plurality of first air holes are evenly formed in the inner side of the first cooling air pipe, a plurality of containing discs are evenly arranged on the temporary storage table, bottle bottom cooling air holes are formed in the containing discs, a cooling air channel is arranged in the temporary storage table, the cooling air channel is communicated with the bottle bottom cooling air holes, and the first cooling air pipe is communicated with the cooling air channel and connected with a cooling air source. According to the utility model, glass bottles are conveyed between the bottle-making machine and the annealing furnace, so that the labor intensity of workers is reduced, and the labor cost is saved.

This invention discloses a weather-resistant enhanced 1kV overhead insulated conductor, relating to the field of power cable technology. Several outer and inner air tubes are connected between two main air boxes located on the same axis. A rubber bladder is embedded between the outer and inner air tubes, and the rubber bladder is filled with microcapsule particles. Two pressure-resistant arc plates are embedded inside the pressure-resistant cavity. A torsion tube is connected between two adjacent pressure-resistant arc plates via two elastic arc plates. Torsion springs are connected between several adjacent torsion tubes. In this invention's pressure-resistant and cold-resistant components, the cable's flexibility is ensured when laying cables in low-temperature weather. In areas with large temperature differences, the cable's temperature change is more stable, preventing prolonged overheating or underheating. In the de-icing and heat dissipation components, the cable temperature is prevented from becoming too high in high-temperature weather and from icing in snowy weather. The two components work together to enhance the cable's weather resistance and improve its performance.