42results about How to "Reduce experimental risk" patented technology

The invention provides a multi-unit miniature modularized reactor control system experimental apparatus and an experimental method thereof, and belongs to the field of nuclear reactor control. The experimental apparatus comprises the following components: a nuclear steam supply system simulator which comprises a higher water tank, a lower water tank, a main water tank, a water pump, an inlet valve, a water outlet valve, and a pipeline; a mother pipe simulator which comprises a main pipe and several draining units; and a main control bench which comprises a data acquisition module, a signal output module, a master control computer and related lines; the invention also provides the experimental method of the experimental apparatus. The experimental apparatus in the condition with low parameter and without irradiation can simulate and analyze dynamic characteristics of the multi-unit miniature modularized reactor system, and design and verify corresponding control schemes.

The present invention provides a method which adopts double quartz tubes to prevent the sample from being oxidated, which relates to the method which can prevent the sample from being oxidated. The method comprises the steps as follows: (1) the sample is placed in a small diameter quartz tube with one end sealed; the other end is neck-sheared by flame and is connected with a rotary sheet vacuum pump; after 30 to 40 minutes of vacuum pumping, the shear neck is sealed quickly by flame. (2) The sealed small quartz tube is placed in a big diameter quartz tube with one end sealed; the other end istreated by neck-shearing by flame, so a double layer of quartz tubes is formed. (3) The neck sheared big diameter quartz tube is connected with the rotary sheet vacuum pump; the vacuum pump is started; after 5 to 8 seconds of vacuum pumping, the sheared neck is sealed quickly by flame. Compared with the traditional high temperature heating oxidation preventing method, the present invention is of simple and easy experiment operation, lower experiment expense, lower experiment risk and higher experiment efficiency.

The invention discloses an experiment table for testing a hydraulic servo system. The experiment table comprises a base, a first differential hydraulic cylinder driving unit, a second differential hydraulic cylinder driving unit, a third support lug, a fourth support lug, a sliding table and a supporting rod, wherein the first differential hydraulic cylinder driving unit and the second differential hydraulic cylinder driving unit are symmetrically fixed on the base along the longitudinal direction; the third support lug and the fourth support lug are used for fixing the first differential hydraulic cylinder driving unit and the second differential hydraulic cylinder driving unit on the base respectively; the sliding table is positioned between the first differential hydraulic cylinder driving unit and the second differential hydraulic cylinder driving unit; the sliding table is connected with the first differential hydraulic cylinder driving unit and the second differential hydraulic cylinder driving unit respectively through a first connecting block and a second connecting block; the supporting rod penetrates the side central position of the sliding table along the transverse direction; and loads are arranged on the supporting rod and on the two sides of the sliding table. When the experiment table is used for performing hydraulic pressure servo control experiment research and hydraulic system position servo control research, an experiment on an actual heavy-load big-inertia equipment mechanical system can be moved to a lab, so that the experiment cost and risk can be largely reduced.

The invention provides a test tube clamping device. The test tube clamping device comprises clamping rings, a tensioning belt, a movable block and a supporting rod, wherein each clamping ring is an arc-shaped semi-ring with an angle smaller than 150 degrees, and the two clamping rings are arranged; the two clamping rings are arranged horizontally and oppositely; the movable block is arranged between edge end parts of the two clamping rings and is close to rear ends of the two clamping rings; the supporting rod is vertically arranged; the movable block is movably fixed at the bottom of the supporting rod; the movable direction of the movable block is vertical to the radial direction of the supporting rod; and the tensioning belt is fixed at the rear ends of the clamping rings and is arranged along the inner sides of the clamping rings, and the movable block is arranged toward one side of the supporting rod. Non-manual operation of separately taking tubes in a sterile environment is realized through a pure mechanical, low-cost and easily-maintaining manner and is stable and reliable; experiment risks can be effectively reduced, and disinfection and sterilization resources are solved; and the test tube clamping device is simple in structure and easy to maintain, and provides reliable guarantees to large-batch strain experiments of middle-size and small-size enterprises.