4results about How to "Serve as a reference" patented technology

This invention relates to the field of building materials technology, and particularly to a method for determining and evaluating the performance of ethylene-vinyl acetate redispersible latex powder in reconstitution into an emulsion. The method includes the following steps: dissolving ethylene-vinyl acetate redispersible latex powder in water to prepare a latex powder solution of a certain concentration; allowing the latex powder solution to stand for a period of time, then placing it in an ultraviolet spectrophotometer to measure the transmittance, plotting transmittance curves after different standing times, and obtaining the transmittance value of the ethylene-vinyl acetate redispersible latex powder; combining the transmittance curve trend and transmittance value, evaluating the performance of the ethylene-vinyl acetate redispersible latex powder in reconstitution into an emulsion, and providing corresponding application suggestions. The method of this invention is convenient to operate, highly practical, produces stable test results, and has good reproducibility, serving as a reference for the quality evaluation of redispersible latex powder in mortar applications.

The present application relates to a kind of gas cracking source, including shell, shell top is provided with cracking source front end cover, support part and hot wire are arranged in the shell interior, and cracking source front end cover is formed with the slit gas path with support part;The top of the shell is provided with beam plate, and beam plate is provided with beam flow hole;The bottom of the shell is provided with venturi structure.The beam flow hole is evenly distributed along the circumference of beam plate, and the sum of the area of beam flow hole is greater than the cross-sectional area of slit gas path;Beam flow hole and the middle axis of beam plate have included angle, so that the direction of air flow after rectification reduces the number of collision with shell inner wall surface and support part as far as possible.By beam flow hole as guiding structure, the collision probability of molecule and hot wire is increased, and beam plate rectifies the molecular flow entering the cracking furnace interior in each direction, so that it can be guided to the surface of hot wire more quickly after entering the cracking cavity interior, and the conversion of molecule to atom is realized after effective collision, and the efficiency and rate of cracking are improved.

This invention discloses a method for determining the radial magnetic gap of an exciter and a method for calculating the magnetic center difference. The method for determining the radial magnetic gap includes the following steps: dividing the upper surfaces of the rotor and stator into four equal parts at 90° intervals; determining the first set of radial magnetic gap distance values; rotating the rotor 180 degrees; measuring the distance between corresponding marks on the horizontal and vertical axes after rotation to obtain the second set of radial magnetic gap distance values; and adjusting the radial magnetic gap if the horizontal or vertical gap adjustment value is greater than or equal to the average gap value X%. The method for calculating the magnetic center difference of the exciter's magnetic force is based on the difference *a* between the sum of the elongations *D* of the motor and blower shafts and the magnetic center offset of the exciter. This method solves the current problem of lacking relevant maintenance techniques for the magnetic gap and magnetic center difference of exciters.

The utility model belongs to the field of building construction, concretely relates to a template installation auxiliary level tool, and the device includes: auxiliary thickness limiting device, fixing device and positioning sheet, the auxiliary thickness limiting device has even number, the auxiliary thickness limiting device is symmetrically arranged at the both sides of wall body, the fixing device penetrates the auxiliary thickness limiting device and wall body, and one end is connected with the auxiliary thickness limiting device and touches, the positioning sheet is detachably connected in the other end of fixing device, and this end passes through the positioning sheet and touches the auxiliary thickness limiting device and connects. The device is used for fixing installation on the surface of core mould after the installation of integral ribbed wall body template, before the spray construction of cementing material, guarantees the flatness of core mould, can control the thickness of guniting simultaneously, guarantees the size and surface flatness after the wall body shaping.