5results about How to "Small expansion deformation" patented technology

The utility model discloses a combined expansive soil side slope seepage-proofing and damp-proofing structure which comprises a side slope body, a side slope surface is arranged on one side of the top end of the side slope body, a slope body outer drainage ditch is formed in the upper surface of the other end of the side slope body, a surface concrete slope protection layer is arranged on the side wall of the side slope body, and a slope body outer drainage ditch is formed in the side wall of the side slope body. The other side of the surface concrete slope protection layer is connected with an anti-seepage spraying layer, and the inner side of the anti-seepage spraying layer extends to form a slope body inner water seepage pipe. The structure is simple in arrangement and convenient to construct, the surface concrete slope protection layer can effectively improve the strength and smoothness of the slope body, the anti-seepage spraying layer can permeate into the concrete layer, a compact waterproof film is formed on the surface of the concrete layer, and the water seepage pipe is arranged in the slope body, so that water in the roadbed body can be effectively removed, the stability of the slope body is guaranteed, and expansion deformation of expansive soil is properly reduced; the structure is short in construction period, simple and convenient in construction process and good in construction effect, and can play roles in seepage prevention and moisture prevention.

The invention discloses a valve device which comprises a valve element and a valve body assembly, the valve body assembly is provided with a valve cavity, at least part of the valve element is located in the valve cavity, the valve element comprises a main body part and an extension part, and the extension part is located on one side of the main body part in the axial direction of the valve device; the valve element is provided with an inner channel and a balance channel, and in the axial direction of the valve device, the inner channel is provided with a first opening in the end, relatively away from the main body part, of the extension part; the valve body assembly comprises a supporting component, the supporting component is provided with a supporting hole, at least part of the extending part is located in the supporting hole, the balance channel is communicated with the inner channel, and the balance channel is communicated with a valve cavity of the valve body assembly. According to the valve device, friction loss can be reduced, and driving energy consumption can be reduced.

The utility model provides a harmonica-shaped tube type air-cooled energy storage battery box which comprises a battery box body and a module in the battery box body, the module comprises battery cells and harmonica-shaped tubes which are arranged at intervals, and the two ends of each harmonica-shaped tube are open and are respectively communicated with air uniformizing holes and a cooling fan on the battery box body; along the direction away from the cooling fan, the inner width of the first harmonica-shaped tube is W1, the inner width of the last harmonica-shaped tube is W2, W2 is equal to 2 * W1, the inner width of the other harmonica-shaped tubes is W3, and W3 is equal to (2.1-2.2) * W1. The harmonica-shaped tube can effectively slow down the expansion deformation of the battery cell; the radiating air ducts uniformly distributed in the harmonica-shaped tube can effectively improve the distribution uniformity of air in the vertical direction and the air velocity under the same flow, and the radiating uniformity and the radiating efficiency are improved; by configuring harmonica-shaped tubes with different inner widths and air uniformizing holes with different distribution densities, the heat dissipation uniformity of the battery cells at different positions in the module is improved, and the overall cycle performance and service life of the module are effectively improved.

The application provides a kind of improved sulphate saline soil road base road building material and preparation method, the improved sulphate saline soil road base road building material includes the following raw material components: by mass percentage, steel slag 1~3.45%, fly ash 1~3.45%, cement 0.55~1.77%, sodium hydroxide 0.54~1.7%, water 1.68~6.38% and sulphate saline soil 83.25~95.23%, the mass percentage of each component is 100%, and the preparation method includes: step 1, the formula amount of steel slag, fly ash, cement is dried and then ground and mixed, then mixed with the formula amount of water and stirred uniformly to prepare mixed liquor A; the formula amount of NaOH is prepared to obtain 10mol / L NaOH solution; step 2, mixed liquor A and the NaOH solution prepared in step 1 are mixed to prepare geopolymer; step 3, the geopolymer is mixed with the formula amount of sulphate saline soil to obtain the product. The improved material provided by the application has the characteristics of good low-temperature resistance, strong anti-freeze-thaw cycle ability, good impermeability, small expansion, good volume stability, and high mechanical properties of the reinforced soil body.

The embodiments of the present application provide a battery cell, a battery, an electrical device, and a manufacturing apparatus and method for a battery cell. The battery cell includes: a shell, an end cover, and a breathable member. The shell has an opening. The end cover is used to cover the opening. The material of the end cover is metal. The breathable member is at least partially located between the end cover and the shell. The breathable member is respectively connected to the end cover and the shell. The breathable member is configured so that when the air pressure inside the battery cell is greater than the air pressure outside the battery cell, the internal gas is released to the outside through the breathable member, thereby reducing the expansion deformation of the battery cell caused by gas production and improving the safety performance of the battery cell; the metal end cover and the shell are connected by a breathable member instead of welding the metal end cover and the shell, thereby reducing the possibility of internal short of the battery cell and improving the safety performance of the battery cell.