CN204269623U - A new type of burette for teaching experiment - Google Patents

Abstract

The utility model discloses a kind of novel education experiment buret, comprise body and titration tube head; Described body upper end is provided with funnel-shaped upper end mouth, and the tube wall of body is provided with scale mark, and body lower end is provided with outer grinding port, outer grinding port is provided with the first air hole, the junction of body bottom and outer grinding port upper end is provided with prolongs limit groove, prolongs limit groove and is provided with slide rail and bayonet socket, connect bias and let slip a remark bottom ground; Described titration tube head comprises the cannula portion and taper drip nozzle portion that match with the ground of body, cannula portion top is provided with interior ground, bottom is provided with leakage core, described cannula portion is provided with the second air hole with the first air hole opposite position, cannula portion outer wall is provided with handle, along being provided with the card slide block matched with the bayonet socket of body and slide rail in cannula portion.The utility model advantage is compared with prior art: detachably combine; Stop oiling contaminated liquid pipeline; Can bubble in Natural excrement titrating head; Controllable liquid flow; Drop reaction is abundant; Liquid residue can be prevented.

Description

A new type of burette for teaching experiment

technical field

The utility model relates to a novel burette for teaching experiments, which belongs to the technical field of teaching and experiment supplies.

Background technique

The burette is a glass instrument commonly used for titration analysis in the laboratory. At present, the glass burette is commonly used. The caliber of the tube is small, and it is easy to flow out of the tube when adding the solution. The lower part of the burette is connected to the drip tip through the glass piston. The pointed mouth is integrated, and the entire acid pipe will be scrapped if it is partially damaged. The horizontal two-way piston plug is easy to fall off, and the oiling is easy to block the polluted liquid pipeline, which is not convenient to clean, leaks, and is not easy to vent.

Utility model content

The utility model provides a novel burette for teaching experiments in order to solve the above-mentioned deficiencies.

The above-mentioned purpose of the utility model is achieved through the following technical solutions: a novel burette for teaching experiments, characterized in that it includes a tube body and a burette head;

The upper end of the pipe body is provided with a funnel-shaped upper port, the pipe wall of the pipe body is provided with a scale line, the lower part of the pipe body is provided with an outer grinding mouth, and the outer grinding mouth is provided with a first air hole, the lower part of the pipe body and the upper end of the outer grinding mouth There is a Yanbian groove at the joint of the Yanbian groove, a slide rail and a bayonet are provided on the Yanbian groove, and the bottom of the outer grinding mouth is connected to the eccentric leak nozzle;

The burette head includes a casing part and a tapered drip nozzle part matched with the outer grinding mouth of the tube body, the upper part of the casing part has an inner grinding hole, and the bottom of the casing part is provided with a leaking core, and the leaking core consists of a through hole part and The sealing part is composed of a second ventilation hole corresponding to the first ventilation hole on the sleeve part, a handle is provided on the outer wall of the sleeve part, and a bayonet and a slide rail are provided on the upper edge of the sleeve part. Compatible card slider.

The eccentric leakage nozzle is conical.

The junction of the through-hole part and the sealing part is S-shaped, that is, the overall shape is "Tai Chi Diagram".

The inner surface of the tapered drip nozzle is a tapered surface with a larger top and a smaller bottom.

Compared with the prior art, the utility model has the advantages that: the upper mouth of the pipe body of the utility model is made into a funnel-shaped upper port, which is convenient for adding solution, and can be held on the neck of the funnel when reading, reducing the strength, and the burette is not easy to slip. The head and the tube body are connected by grinding mouth and edge groove, which can be disassembled; the eccentric tube is located in the cavity between the outer grinding mouth of the tube and the inner grinding mouth of the burette head, so as to prevent oil from polluting the liquid pipeline; the ground mouth and the burette head sleeve There are overlapping air holes on the top, which can naturally discharge the air bubbles in the burette; by rotating the burette head with the handle, the overlapping parts of the eccentric tube nozzle and the leaking core are different, which can control the liquid flow, and at the same time, it can also avoid dripping at the same position. The titration reaction is sufficient; the inner edge of the through hole is a large and small conical surface, which is easy for the liquid to slip and prevent the liquid from remaining and affecting the accuracy; the production of this burette is simple and convenient, and it solves the leakage, blockage and exhaust of the traditional glass burette And other issues.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, a novel teaching experiment burette is characterized in that: it comprises a tube body 1 and a burette head 2;

The upper end of the pipe body 1 is provided with a funnel-shaped upper port 1-1, the pipe wall of the pipe body 1 is provided with a scale line 1-2, and the lower part of the pipe body 1 is provided with an external grinding port 1-3, and an external grinding port 1-3 There is a first air hole 1-4 on the upper part, and the connection between the lower part of the pipe body 1 and the upper end of the outer grinding mouth 1-3 is provided with a Yanbian groove 1-5, and the Yanbian groove 1-5 is provided with a slide rail 1-6 and a bayonet 1-7, the bottom of the outer grinding port 1-5 is connected to the eccentric leak nozzle 1-8;

The burette head 2 includes a sleeve part 2-1 and a tapered drip nozzle part 2-2 matched with the outer grinding port 1-3 of the tube body 1, and the upper part of the sleeve part 2-1 has an inner grinding port 2-3 , the bottom of the casing part 2-1 is provided with a leakage core 2-4, the leakage core 2-4 is composed of a through hole part 2-5 and a sealing part 2-6, and the casing part 2-1 is provided with the first The second ventilation hole 2-7 corresponding to the position of the ventilation hole 1-4, the outer wall of the casing part 2-1 is provided with a handle 2-8, and the upper edge of the casing part 2-1 is provided with a bayonet 1- 7 and the card slide block 2-9 that slide rail 1-6 cooperates. The inner surface of the tapered drip nozzle part 2-2 is a tapered surface with a larger top and a smaller bottom.

When in use, apply vaseline on the outer grinding port 1-3 of the lower part of the tube body, and apply vaseline on the edge groove 1-5 and slide rail 1-6, and the card slider 2-9 on the upper end of the burette head 2 passes through the bayonet port 1 -7 deflection, the grinding mouth 2-3 and the sleeve part 2-1 are clamped by the bayonet 1-7 on the edge groove 1-5 and the card slider 2-9 on the sleeve part 2-1, and are combined into a burette Main body; the rotating handle 2-8, the card slider 2-9 slides radially on the Yanbian groove 1-5 and the slide rail 1-6, the eccentric leak nozzle 1-8 is docked with the leak core sealing part 2-6 until it is sealed , add the solution from the upper port of the tube body 1 to above the zero scale line 1-2, rotate the handle, the eccentric leak nozzle 1-8 is docked with the leak core through hole part 2-5, and adjust the eccentric leak nozzle 1-8 and the leak core through hole part 2-5 The size of the overlapping part, adjust the liquid level, the tapered drip nozzle is filled with solution, the first vent hole 1-4 and the second vent hole 2-7 completely or partially overlap to form a through hole, the bubbles in the buret head 2 pass through The through-holes of the overlapping parts of the first vent hole 1-4 and the second vent hole 2-7 are naturally discharged, and the air bubbles in the tube body 1 are naturally discharged through the upper port of the tube body 1 . Continue to rotate the handle 2-8 to control the flow and carry out the titration operation.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (4)

1. a novel education experiment buret, is characterized in that: comprise body and titration tube head;

Described body upper end is provided with funnel-shaped upper end mouth, the tube wall of body is provided with scale mark, body bottom is provided with outer grinding port, outer grinding port is provided with the first air hole, the junction of body bottom and outer grinding port upper end is provided with prolongs limit groove, prolong limit groove and be provided with slide rail and bayonet socket, connect bias bottom outer grinding port and let slip a remark;

Described titration tube head comprises the cannula portion and taper drip nozzle portion that match with the outer grinding port of body, interior ground is arranged at cannula portion top, leakage core is provided with bottom cannula portion, leak core to be made up of through-hole section and sealing, described cannula portion is provided with the second air hole with the first air hole opposite position, cannula portion outer wall is provided with handle, along being provided with the card slide block matched with the bayonet socket of body and slide rail in cannula portion.

2. a kind of novel education experiment buret according to claim 1, is characterized in that: described bias is let slip a remark tapered.

3. a kind of novel education experiment buret according to claim 1, is characterized in that: described through-hole section and sealing intersection S-shaped, namely overall in " Diagram of the Supreme Ultimate " shape.

4. a kind of novel education experiment buret according to claim 1, is characterized in that: described taper drip nozzle portion medial surface is up big and down small taper surface.