3results 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 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.