CN217910496U

CN217910496U - Push type burette

Info

Publication number: CN217910496U
Application number: CN202221536538.0U
Authority: CN
Inventors: 张岩; 刘敏; 沈禹颖
Original assignee: Lanzhou University
Current assignee: Lanzhou University
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-11-29
Anticipated expiration: 2032-06-17

Abstract

The utility model discloses a push type burette, including glass pipe, spring and pressing piece, glass pipe upper portion is the back taper body, and the lower part is the tubule that communicates bottom the back taper body, the pressing piece includes clamp plate, depression bar and pressure head, the depression bar passes through glass pipe top opening and glass pipe sliding connection, the clamp plate sets up in the depression bar top, the pressure head sets up in the size that the size of depression bar bottom and pressure head is greater than the depression bar, on the depression bar was located to the spring housing, made pressure head and glass inside pipe wall circumference butt. The utility model discloses simple structure adopts the monolithic linkage structure, need not to dismantle, effectively avoids frequently dismantling the damage that causes the burette and loses, and push type burette is convenient for the accurate operation of experimenter and is inhaled/the tapping to avoid the waste of experimental materials.

Description

Push type burette

Technical Field

The utility model belongs to the technical field of the burette, in particular to push type burette.

Background

The dropper is a liquid taking tool commonly used in laboratories, and the dropper is various in types, wherein the dropper is most commonly used and is a rubber head dropper. The liquid absorption amount can not be controlled when the traditional rubber head dropper is used, too much liquid is absorbed at one time, experimental materials are wasted, and the problems that the rubber head is corroded and the like are easily caused when the liquid flows into the rubber head.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a push type burette aims at solving the problem that prior art exists among the above-mentioned background art.

In order to achieve the purpose, the utility model adopts the technical proposal that:

the utility model provides a push type burette, includes glass pipe, spring and pressing element, glass manages upper portion and is the back taper body, and the lower part is the tubule that communicates bottom the back taper body, the pressing element includes clamp plate, depression bar and pressure head, the depression bar passes through glass tube top opening and glass pipe sliding connection, the clamp plate sets up in the depression bar top, the pressure head sets up to be greater than the size of depression bar in the size of depression bar bottom and pressure head, the spring housing is located on the depression bar, makes pressure head and glass intraductal wall circumference butt.

When the push type burette is not used, the pressure head and the inside wall circumference butt of glass pipe of pressing element bottom form seal structure under the effect of spring, during the imbibition, press down clamp plate extension spring and discharge the inside branch air imbibition of glass pipe, restoring force through the spring drives depression bar rebound to pressure head and inside wall circumference butt of glass pipe, accomplish the imbibition, inhale/put liquid convenient and fast, the pressure head forms seal structure with the glass pipe, effectively avoid the intraductal liquid stream of glass to the corrosion spring in glass pipe top, thereby promote the life of push type burette, the push type burette can be according to the experiment needs a small amount of slowly inhaled liquid, avoid once only inhaling too much to cause experimental materials's waste.

Furthermore, the junction of depression bar and pressure head sets up the depressed part, the bottom of spring sets up in the depressed part, and the top of spring sets up on the depression bar in the glass pipe open-top outside.

Furthermore, a flange is arranged at an opening at the top of the glass tube, and a groove for the spring to pass through is formed in the flange. The bottom of the spring is fixed on the concave part, the groove arranged at the flange part strengthens the fixing action on the spring,

furthermore, the pressing piece is made of glass, so that the pressing type dropper can be integrally placed in a drying box to be dried conveniently.

Further, the horizontal section size of the pressure plate is larger than that of the pressure rod. The stress area of the pressing plate is increased, so that an experimenter can operate the pressing type dropper conveniently.

Compare in prior art's shortcoming and not enough, the utility model discloses following beneficial effect has:

1. the utility model provides a push type burette, press piece and glass pipe sliding connection establish the spring through the cover on the depression bar, make the pressure head and the glass inside pipe wall circumference butt of press piece, form seal structure, effectively avoid the intraductal liquid of glass to flow in glass pipe top corrosion spring, the accurate operation imbibition of experimenter is convenient for to the push type burette, avoids experimental materials's waste.

2. Glass pipe, pressing piece and spring are whole to be linked, avoid frequently dismantling the damage that causes experimental apparatus and lose, because glass pipe and pressing piece adopt the glass material, consequently the stoving case stoving, convenient and fast can be put into wholly to the push type burette.

Drawings

Fig. 1 is a schematic structural view of the push type dropper of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

FIG. 3 is a top view of the glass tube at the top opening of the present invention.

In the figure: 1-a glass tube; 11-an inverted conical tube body; 111-a flange; 112-a groove; 12-a thin tube; 2-pressing piece; 21-pressing plate; 22-a compression bar; 23-pressure head; 24-a recess; 3-a spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, a press type dropper comprises a glass tube 1, a press part 2 and a spring 3, wherein the press part 2 is connected with the glass tube 1 in a sliding manner, the glass at the opening at the top of the glass tube 1 is thicker to form an annular flange 111, the upper part of the glass tube 1 is an inverted cone-shaped tube body 11, the cross-sectional area of the inverted cone-shaped tube body 11 gradually enlarges from the top tube opening to the bottom of the inverted cone-shaped tube body 11, the diameter of the tube opening is preferably 1.5cm, a thin tube 12 at the lower part of the glass tube 1 is arranged in the center of the bottom of the inverted cone-shaped tube body 11 and is communicated with the inverted cone-shaped tube body 11 at the upper part, the diameter of the thin tube 12 is preferably 0.15cm, the length is preferably 6cm, the press part 2 comprises a press plate 21, a press rod 22 and a press head 23 which are sequentially connected from top to bottom, the diameter of the press rod 22 is matched with the opening at the top of the glass tube 1 in size, so that the press rod 22 is connected with the glass tube 1 in a sliding manner, the press plate 21 is arranged at the top of the press rod 22, the horizontal section size of the pressure plate 21 is larger than that of the pressure rod 22 to increase the stressed area of the pressure plate 21 and facilitate the operation of experimenters, (refer to fig. 2) an annular concave part 24 is arranged between the pressure rod 22 and the pressure head 23 to make the size of the joint of the pressure rod 22 and the pressure head 23 smaller than that of the pressure rod 22, the horizontal section size of the pressure head 23 is larger than that of the pressure rod 22, the spring 3 is sleeved on the pressure rod 22 to make the lower part of the pressure rod 22 positioned in the glass tube 1, the upper part of the pressure rod 22 is positioned outside the glass tube 1, the pressure head 23 is abutted against the circumferential direction of the tube wall of the glass tube 1, the bottom of the spring 3 is arranged on the concave part 24, the top of the spring 3 is arranged on the pressure rod 22 outside the top opening of the glass tube 1, (refer to fig. 3) a flange 111 at the top opening of the glass tube 1 is provided with a groove 112 for the spring 3 to penetrate through, the groove 112 can fix the spring 3, but also can ensure the sealing performance between the top orifice of the glass tube 1 and the pressure rod 22. Under the natural state, because the effect of spring 3, pressure head 23 and the pipe wall butt of glass pipe 1 form seal structure to the liquid in avoiding glass pipe 1 flows to spring 3 department corruption spring 3.

The side wall of the glass tube 1 is provided with scale marks, so that an operator can sample accurately.

The pressing piece 2 is made of glass, and is matched with the glass tube 1 and the spring 3, so that the pressing dropper can be integrally placed into the drying box for drying, and cannot be damaged due to high temperature.

Because glass pipe 1, pressing member 2 and spring 3 adopt the form of integrative linking for the push type burette need not to dismantle, can wholly wash the stoving, avoids frequently dismantling and appears assembling mistake or lose scheduling problem when leading to using.

When this push type burette uses, press the clamp plate 21 and make pressing member 2 along the top mouth of pipe downstream of glass pipe 1, the air in the glass pipe 1 of discharging, spring 3 is in tensile state this moment, stretch into the 12 bottoms of tubule with glass pipe 1 and wait to get the liquid, spring 3 drives pressing member 2 rebound, form the negative pressure in the glass pipe 1, liquid is along tubule 12 entering glass pipe 1, pressure head 23 offsets with 1 inner wall of glass pipe and accomplishes and get liquid, press the clamp plate 21 once more with the liquid discharge in the glass pipe 1.

The utility model provides a push type burette, press and glass pipe sliding connection, through set up the spring on the depression bar at the press, only need press the press during imbibition to drive the press through the spring and reset, effectively promote the convenience of burette imbibition, press the pressure head and the pipe wall butt of press bottom, make the intraductal liquid of glass can't flow to glass pipe top corrosion spring, thereby promote the life of push type burette.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. The utility model provides a push type burette, a serial communication port, includes glass pipe, spring and pressing piece, glass pipe upper portion is the back taper body, and the lower part is the tubule with back taper body bottom intercommunication, glass pipe top opening part sets up the flange, the flange is equipped with the recess that supplies the spring to pass, the pressing piece includes clamp plate, depression bar and pressure head, the depression bar passes through glass pipe top opening and glass pipe sliding connection, the clamp plate sets up in the depression bar top, the pressure head sets up in the size that the size of depression bar bottom and pressure head is greater than the depression bar, on the depression bar was located to the spring housing, made pressure head and glass inside pipe wall circumference butt, the junction of depression bar and pressure head sets up the depressed part, the bottom of spring sets up in the depressed part, and the top of spring sets up on the depression bar in the glass pipe top opening outside.

2. The push type dropper of claim 1, wherein the pressing member is made of glass.

3. The push dropper of claim 1 wherein the pressure plate has a horizontal cross-sectional dimension greater than a horizontal cross-sectional dimension of the pressure bar.