5results about How to "Avoid tensile stress" patented technology

The utility model provides an elbow and a heat exchanger thereof, the elbow is used for being matched with an internal thread pipe of the heat exchanger, and the elbow comprises a pipe part; the plurality of flaring parts are connected with one another through the pipe parts; and the plurality of flaring parts are sleeved on the internal thread pipe, so that the elbow is fixed on the heat exchanger. According to the utility model, the internal thread pipe does not need to be flared and is more stable, and the process efficiency is improved.

The present application relates to a kind of shallow hard rock compressed air energy storage chamber optimization design method, comprising the following steps: according to the maximum air internal pressure of the chamber to be built obtained by preliminary determination of use demand;Determine the initial depth of chamber;Get the earth stress of chamber periphery, determine the strike of chamber;Calculate the zero stress axis ratio and the best axis ratio of chamber;Check whether the air internal pressure of chamber is lower than the maximum value that the surrounding rock of chamber at initial depth can bear;Check whether the surrounding rock pressure of chamber at initial depth under the best axis ratio is greater than the preset threshold, to determine the depth of chamber;Determine the cross-sectional area of chamber, calculate vertical half axis and transverse half axis length according to zero stress axis ratio or best axis ratio, determine the shape of chamber, to determine shallow chamber.Compared with prior art, the present application has the advantages that the chamber can meet the requirements of stability and sealing, and economic considerations.

The invention belongs to the technical field of thermal insulation coatings, and particularly relates to a preparation method and application of a thermal insulation and exposed waterproof integrated material, and the preparation method of the integrated material comprises the following steps: A, weighing all components according to the proportion of the integrated material for later use; b, adding part of water, an emulsifier and all the hydrophobic emulsion into a stirring container, and stirring and emulsifying to obtain pre-emulsified liquid; and C, taking another stirring container, adding the rest water and emulsifier, then adding all the silicon dioxide aerogel, hollow glass gel beads and titanium dioxide, uniformly stirring, then adding the pre-emulsified liquid and auxiliaries, uniformly stirring, and filtering to obtain the integrated material. By changing the composition proportion of the integrated material, the heat insulation and water resistance of the integrated material are improved, and pulverization of the surface layer of a formed coating is prevented, so that the performance of the coating is improved, the service life of the coating is prolonged, and the integrated material has better weather resistance and is not prone to cracking.

The invention relates to a perovskite solar cell, a preparation method and application thereof, and a photovoltaic module. The preparation method of the perovskite solar cell comprises the following steps: preparing an electron transport layer on the surface of a first electrode, wherein the electron transport layer comprises oxygen atoms; arranging the modification solution on the surface, away from the first electrode, of the electron transport layer, and performing annealing treatment to form a modified layer; the modified solution comprises tetrabutylammonium chloride, and the concentration of the modified solution is 0.1 mg / mL to 1.5 mg / mL; and sequentially preparing a perovskite light absorption layer and a second electrode on the surface, far away from the electron transport layer, of the modified layer. According to the preparation method, the photoelectric conversion efficiency and the stability of the perovskite solar cell can be effectively improved.

The utility model discloses a kind of inspection well liquid level sensor installation components, it relates to inspection well pipe network monitoring technical field, it includes first pole body and positioning element, by setting hollow first pole body, and positioning element with conical structure is set in one end of first pole body;When using, the guidance and puncture effect of the conical structure of positioning element, first pole body is inserted into the soil in the bottom of inspection well, overflow hole on first pole body makes that the liquid in inspection well can enter the inner chamber of first pole body, after the pressure sensor of immersion type liquid level meter is immersed into the inner chamber of first pole body, the liquid level height of the inner chamber of inspection well can be detected by the pressure sensor in the inner chamber of first pole body, and pressure sensor is located in the fixed inner chamber of first pole body, pressure sensor does not move with the flow of liquid, to prevent connecting line from repeatedly tensile stress, effectively protect the installation structure and connecting line of display element.