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A switch device for a burette

A technology of switch device and burette, which is applied in the direction of chemical analysis by titration method, can solve the problems of inconvenient control, non-universal use, inconvenient use, etc., and achieve the effect of low price, convenient switch control, and not easy to damage

Active Publication Date: 2017-06-13
SUZHOU HAOLI CULTURE MEDIA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two switches are inconvenient to control and cannot be used universally, which brings inconvenience to use

Method used

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  • A switch device for a burette
  • A switch device for a burette
  • A switch device for a burette

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] see figure 1 As shown, use corrosion-resistant hard plastic injection molding to manufacture the switchgear of the burette respectively. The upper cover 21 has an upper cover inner screw 23 and an upper cover inner cone 22. The upper tube frame 2 and the lower tube frame 3 are tightly fitted, and there The central straight hole 5 is just enough to insert the hose 62. The inner diameter of the hollow column 26 at the upper end of the upper tube holder 2 is enough to be inserted into the lower connecting tube of the burette 1. The length of the hollow column 26 is sufficient to reach the position above the maximum outer diameter of the lower connecting tube of the burette 1. , the hollow pipe column 22 is provided with several longitudinal opening grooves 24 along the ring, and the upper section of the upper pipe frame 2 has an external thread, which matches the upper cover 21. The special-shaped guide groove 27 in the center, the longitudinal length of the near-center op...

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PUM

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Abstract

The invention discloses a switch device for a burette, which comprises a burette; The switch ring is connected with the lower pipe frame, a central straight hole is arranged in the lower pipe frame, and a flexible pipe is arranged below the lower pipe frame. The device of the invention is simple, the production process is simple, and the price is low. Compared with the current burette, the switch control is convenient and the liquid control is accurate, and it can be generally used in the application of acid and alkali solutions, and is not easy to be damaged.

Description

technical field [0001] The invention belongs to a burette device, in particular to a switch device for a burette. Background technique [0002] The burette is the most commonly used instrument and equipment in chemical experiments and chemical detection. It is widely used. It is usually divided into acid-type and alkali-type burettes. The acid-type burette uses a glass piston as a switch. Vaseline should be applied, and the connection between the control switch and the tube body is thin and easy to break. The alkaline burette uses a latex tube embedded with glass beads. When using it, the latex tube outside the glass bead cannot be pressed, and the glass bead is easy to break when using a strong alkaline solution. slide. All there is inconvenient control in above two kinds of switches, and the defective that can't be used universally, brings inconvenience to use. Contents of the invention [0003] The purpose of the present invention is to overcome the above problems exi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/18
Inventor 胡颖胡平
Owner SUZHOU HAOLI CULTURE MEDIA TECH CO LTD