38results about How to "Manufacturing and running costs are low" patented technology

The invention discloses a device for testing the high pressure stability and pumping limit performance of concrete. The device comprises a test cylinder, a cone-shaped tube and a pump pipe, wherein the test cylinder is internally provided with a piston capable of sliding along the axial direction on the inner wall of the test cylinder; the outer end surface of the piston is connected with an externally arranged propeller; one end of the test cylinder is connected with the large-aperture end of the cone-shaped tube, and the small-aperture end of the cone-shaped tube is connected with one end of the pump pipe; a discharge hole is formed at the other end of the pump pipe; a stop valve is arranged at the discharge hole; a feeding hole is formed in the cone-shaped tube; a pressure sensor is arranged in the pump pipe; the axes of the test cylinder, the cone-shaped tube and the pump pipe are overlapped. The invention also discloses a method for testing the high pressure stability of the concrete and a method for testing the pumping limit performance of the concrete. After the device and the methods are adopted, the ultrahigh pumping pressure environment of the concrete can be simulated in the actual construction process, so that the high pressure stability of the pump concrete can be detected; the device and the methods are good in detection effect and high in accuracy of the testing results, thus being used for evaluating the performances of the concrete in a limit pumping state.

The invention provides a testing device and testing method of the building performance of a 3D print material of a building. The testing device comprises a test tube, a stack height measurer and an extended measurement plate, wherein the test tube is suspended through a bracket; the stack height measurer comprises a measurement rod and a measurement needle; the measurement rod is vertically arranged at one side of the test tube; the measurement needle is horizontally arranged and one end of the measurement needle is connected with the measurement rod; and the extended measurement plate is arranged at the lower part of an outlet of the test tube. According to the testing device and the testing method, quantitative evaluation of the building performance of the 3D print material of the building can be achieved, the detection effect is good and the accuracy of the detection result is high.

The invention relates to a permanent-magnetic hierarchical testing device for the content of magnetic substance powder. The invention is characterized by comprising the following steps: a. respectively adopting a ferrite magnetic material, a common Nd-Fe-B magnetic material and a high-performance Nd-Fe-B material to manufacture magnetic steel in the same specification size, and adopting a structure mode of clamping a high-permeability yoke sheet between every two adjacent magnetic steel to construct at least two hierarchical magnetic sources in an extrusion mode; b. utilizing a circular medium net or a steel-wool magnetism-collected medium made of high-permeability stainless steel to fill a magnetism-collected medium filling area, i.e., a separation space, wherein the magnetism-collected medium filling the magnetism-collected medium filling area can be arranged from sparsely to densely, and the magnetism-collected medium filling area and the corresponding hierarchical magnetic sourcesform a hierarchical closed magnetic system; and c. adopting a pressure device to drive each hierarchical magnetic source to make reciprocating motion in a cylinder and repeatedly enter or exit the separation space so as to realize the separation, the collection and the measurement of magnetic substances.

A fault diagnosis method of a hydraulic submerged pump system comprises three steps of data acquisition and storage, data processing and analysis as well as data diagnosis and alarming. According to the method, fault information in the system are accurately reflected with a multivariate data analysis method, coupling of multiple variates in the system are analyzed, and a new comprehensive index is formed and can comprehensively reflect faults of the original system. With the adoption of the method, fault types of a submerged pump can be accurately reflected, the reliability of the submerged pump system can be effectively improved, the usage range is wide, and manufacturing and operation costs are low.

The invention discloses a test method and a test device for simulating corrosion of a steel material under a snow-melting agent environment. The test method and the device are simple in structure, simple and convenient in operation and low in manufacturing and operating cost, and the corrosion process of the steel material under the snow-melting agent environment can be simulated under the laboratory condition. A rotating test sample rack capable of rotating at constant speed is adopted, the number of the developed test samples is large, the test samples are sprayed uniformly and the reliability of test data is guaranteed. Through test parameter and process control, the corrosion test of the steel material under the snow-melting agent environment can be developed and simulated in the laboratory, simulation can be conducted by aiming at various factors (different environment temperature, different ice and snow thickness, different spraying flow of the snow-melting agent and different concentration of the snow-melting agent), a large amount of scientific and reasonable test data can be acquired within short time, and a convenient and rapid method is provided for research on the corrosion and development of the steel material under the snow-melting agent environment.