Heated Pneumatic Pin Insertion Apparatus for Needle Plate Specimen Preparation for Electrodendritic Experiments
A thermopneumatic needle insertion and sample preparation technology, which is applied in the preparation of test samples, measuring devices, and measuring electricity, can solve the problems of small number of experimental targets, affecting the initiation and growth of electric tree branches, and large experimental dispersion.
Active Publication Date: 2017-02-22
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
The disadvantage of this method is that since only one needle is inserted in a sample, the number of experimental targets that can be observed in a single test is too small, and the experiment dispersion is relatively large; if the needle is inserted at room temperature, there will be Mechanical stress, which in turn affects the initiation and growth of electrical dendrites; manual pin insertion is time-consuming and laborious
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Embodiment 1
[0020] like figure 1 As shown, this embodiment includes: a needle loading mechanism, a driving mechanism and a sample carrying mechanism arranged in the operation box 1, wherein: the needle loading mechanism is slidably arranged in the operation box and connected with the driving mechanism, and the sample carrying mechanism is facing The needle-up mechanism is in contact with the needle-up mechanism when the drive mechanism is activated to realize the sample insertion.
[0021] The needle loading mechanism includes: a punch seat 20, a guide rail slider mechanism, a movable clip-type needle clip 15 and an elastic member, wherein: the movable clip-type needle clip 15 for containing the metal punch needle 19 is movable It is arranged on the slide block mechanism of the guide rail and connected with the punch seat 20 through the elastic member.
[0022] A connecting rod 28 is arranged horizontally on the punch seat 20, and the head end of the connecting rod 28 is in contact with ...
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Abstract
The invention relates to a heating pneumatic needle inserting device for needle plate sample preparation for an electrical tree test. The heating pneumatic needle inserting device comprises a heating and temperature control mechanism, a needle feeding mechanism, a driving mechanism and a sample bearing mechanism, wherein the needle feeding mechanism is arranged in an operation box in a sliding mode and is connected with the driving mechanism; the sample bearing mechanism is directly opposite to the needle feeding mechanism and is in contact with the needle feeding mechanism to realize sample needle insertion when the driving mechanism is started. The needle inserting temperature can be flexibly set according to requirements, the device is suitable for samples with different thicknesses, a plurality of needles can be inserted at equal intervals on the same sample, and the depths of the inserted needles are flexible and adjustable; moreover, the device adopts pneumatic needle insertion, and is time-saving and labor-saving.
Description
technical field [0001] The invention relates to a technology in the field of cable insulation preparation, in particular to a pneumatic needle insertion device capable of inserting multiple needles at equal intervals and at the same depth into the same sample under heating conditions. Background technique [0002] Electric tree branches are one of the main reasons for the failure of solid insulation under high electric field. Therefore, it is of great significance to study the growth characteristics and growth mechanism of electric tree branches in cable insulation to improve the safety and reliability of power transmission systems. The needle-plate electrode system is currently the most widely used electrode structure in electrical dendritic experiments. This electrode structure is convenient for the observation of electrical dendritic growth and is easier to implement. At present, a common method for preparing samples for needle-plate electrodes is: slice the cable insulat...
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IPC IPC(8): G01N1/28G01R31/20
Inventor 王雅妮吴建东尹毅王亚林
Owner SHANGHAI JIAOTONG UNIV