Cone penetration measuring instrument

Abstract

The invention discloses a cone penetration measuring instrument. The cone penetration measuring instrument comprises a rack body (1), wherein a test needle (2) is arranged on the rack body (1); a test cone head (3) is arranged at the lower end of the test needle (2); a guide hole (4) for allowing the test needle (2) to vertically drop into a test material is arranged in the rack body (1); the cone penetration measuring instrument is equipped with a limited structure (5) for allowing the test needle (2) to relieve limiting in the peripheral direction; the limited structure (5) comprises a limiting disc (5.1) which is arranged in the rack (1) and sleeves in the peripheral direction of the test needle (2); and a plurality of limited posts (5.2) which abut against the peripheral wall of the test needle are arranged in the peripheral direction in the limited disc (5.1) at intervals. The invention provides the cone penetration measuring instrument which relieves the limiting in the peripheral direction, so that the test needle drops, is not liable to tilt or is not liable to colloid with the guide hole, and speed, dropping into the test material, of the test cone head is consistent.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a cone penetration measuring instrument. Background technique [0002] Cone penetration is an index to measure the consistency and hardness of grease. It refers to the depth of the cone falling into the sample under the specified load, time and temperature conditions. The larger the penetration value, the softer the test matrix material is, and vice versa. Ointment is a common dosage form of drugs for external use. Commonly used base materials include vaseline, lanolin, beeswax and other semi-solid substances. The measurement of viscosity has corresponding provisions. [0003] The existing instrument for testing cone penetration includes a frame body, a test needle is arranged on the frame body, and a test cone head is provided at the lower end of the test needle. The test needle is released from the limit and falls so that the test cone head falls into the test mat...

AI Technical Summary

Problems solved by technology

[0003] The existing instrument for testing cone penetration includes a frame body, a test needle is arranged on the frame body, and a test cone head is provided at the lower end of the test needle. The test needle is released from the limit and falls so that the test cone head falls into the test material. The depth of the taper is used to detect its hardness, but if the test needle shakes or the circumferential limit is uneven when the test needle is released from the limit, it is easy to make the test needle skew when it falls, causing the test cone to fall into the direction of the test material Skew, or non-circumferential release of the limit at the same time when the limit is released, and collide with the guide hole wall in the frame, so that the speed of the test cone falling into the test material is disturbed and the test result is affected. When testing multiple times, the test needle The installation height cannot be guaranteed to be exactly the same, and the speed at which the test cone falls into the test material will be disturbed, which will affect the test results

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