CN111665322B

CN111665322B - Precision constant burette for inspection and detection center

Info

Publication number: CN111665322B
Application number: CN202010703379.8A
Authority: CN
Inventors: 韩笑
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2022-07-01
Anticipated expiration: 2040-07-21
Also published as: CN111665322A

Abstract

The invention discloses a precise constant burette for an inspection and detection center, which comprises a burette, wherein the burette comprises a burette body and a liquid dropper arranged at the lower end of the burette body in a threaded manner, a sealing ring is movably arranged at the joint of the burette body and the liquid dropper movably arranged on the burette body, a threaded notch I is formed at the lower end of the burette body, a threaded notch II matched with the threaded notch I for use is formed at the upper end of the liquid dropper, the sealing ring is arranged at the joint of the threaded notch I and the threaded notch II, a liquid guide inner cavity is formed inside the liquid dropper, a liquid outlet is formed at the tail end of the liquid dropper, and an adjusting pipe is formed in the middle of the liquid dropper in a processing manner. The burette is designed into a split type two-section structure, the head part can be replaced and used according to the requirement, and compared with the existing integrated structure, the split type mounting mode is convenient for splitting and cleaning the head part of the burette, thereby ensuring the accuracy of the checking data of the burette.

Description

Precision constant burette for inspection and detection center

Technical Field

The invention relates to the technical field of appliance accessories for inspection and detection, in particular to a precise constant burette for an inspection and detection center.

Background

A burette refers to a meter that holds a titrant solution during a titration operation. The burette is a slender glass tube with uniform inner diameter and scale, the lower end of the tube is provided with a glass sharp mouth with different volumes of 25ml, 50ml and the like, the burette is a main measuring device used in a titration analysis method, the volume of the burette is not completely consistent with the volume marked by the burette, and the burette has different volumes at different temperatures due to the fact that glass has the characteristics of expansion with heat and contraction with cold in an analysis work with higher requirement on accuracy. In calibration, a common temperature value must be specified, which is a standard temperature. The standard temperature for glass capacity vessels is specified internationally as 20 ℃, i.e. the volume of the glass capacity vessel is calibrated to the actual volume at 20 ℃ at the time of calibration.

However, the conventional burette for testing has the following problems in the use process: (1) the burette is an integrated glass container, the liquid dropping head with a small diameter is difficult to clean in a conventional mode of cleaning through a soft brush, so that the accuracy is affected, and the whole burette is required to be replaced when the position of the burette is damaged in an integrated design mode; (2) carry out the dropping liquid control mode through the cock to the buret and though have better convenience, receive the influence of temperature, the situation that expend with heat and contract with cold can take place for glass produces the weeping easily, and the installation mode of cock horizontal all need detect the cock position through the test paper when the inspection at every turn, and the operation is very loaded down with trivial details. For this reason, a corresponding technical scheme needs to be designed to solve the existing technical problems.

Disclosure of Invention

The invention aims to provide a precise constant burette for an inspection and detection center, which solves the problems in the background technology and meets the actual use requirements.

In order to achieve the purpose, the invention provides the following technical scheme: a precise constant burette for an inspection and detection center comprises a burette, the burette comprises a burette body and a dripper, the dripper is arranged at the lower end of the burette body in a threaded manner, a sealing ring is movably arranged at the joint of the burette body and the dripper movably arranged on the burette body, a first threaded notch is formed at the lower end of the burette body, a second threaded notch matched with the first threaded notch is formed at the upper end of the dripper, the sealing ring is arranged at the joint of the first threaded notch and the second threaded notch, a liquid guide inner cavity is formed inside the dripper, a liquid outlet is formed at the tail end of the dripper, an adjusting pipe is formed at the middle part of the dripper in a processing manner, the adjusting pipe and the dripper are integrally formed and internally provided with an adjusting cavity, two ends of the adjusting cavity are respectively provided with an opening and are movably provided with an adjusting plug, and pull rings are installed at two ends of the adjusting plug, the two groups of pull rings are positioned at the opening, and a liquid discharge port is formed in the surface of the adjusting plug.

As a preferred embodiment of the present invention, butt-joint protrusions are formed at the bottom of the first thread notch and the top of the second thread notch, and the two sets of butt-joint protrusions are in a convex arc structure.

As a preferred embodiment of the present invention, the sealing ring includes an outer ring and a silica gel pad embedded inside the outer ring, and the silica gel pad is in an annular structure and has an inner diameter smaller than an outer diameter of the abutting joint protrusion.

As a preferred embodiment of the invention, the adjusting cavity channel is in a U-shaped structure, and the corners of the adjusting cavity channel are in a smooth arc-shaped structure.

In a preferred embodiment of the present invention, the adjusting plug is made of a flexible PVC material and has a length greater than that of the adjusting channel, and the inner diameter of the adjusting plug is equal to that of the adjusting channel.

In a preferred embodiment of the present invention, the liquid discharge port is a triangular structure and is opened on the right side of the center line of the adjusting plug, and the end of the liquid discharge port having a larger inner diameter is an arc-shaped structure.

In a preferred embodiment of the present invention, the end of the liquid dropper is a cone-shaped structure and the outer diameter of the main body is equal to half of the outer diameter of the adjusting tube.

Compared with the prior art, the invention has the following beneficial effects:

1. this scheme is split type two segmentation structures with the buret design, can change the use to the head as required, is convenient for choose for use different heads according to the pH of solution to split type mounting means is compared in current integral type structure, is convenient for carry out split cleaning to the head of buret, thereby guarantees the accuracy of buret inspection data.

2. Compared with the existing faucet adjusting mode, the novel adjusting plug is designed, the upward stretching adjusting type structure designed by the scheme can effectively avoid the problem that the sealing performance of the connecting part of the faucet and the container is poor due to the hot expansion and cold shrinkage of the glass container, and is simple in structure and convenient to operate.

Drawings

FIG. 1 is an overall block diagram of the present invention;

FIG. 2 is a partial A structural view of the present invention;

FIG. 3 is a partial B structural view of the present invention;

FIG. 4 is a view showing the structure of the seal ring according to the present invention;

fig. 5 is a view showing the structure of the regulating plug according to the present invention.

In the figure, 1-a burette body, 2-a dripper, 3-a sealing ring, 4-a first thread notch, 5-a second thread notch, 6-a liquid guide inner cavity, 7-a liquid outlet, 8-an adjusting pipe, 9-an adjusting cavity channel, 10-an opening, 11-an adjusting plug, 12-a pull ring, 13-a liquid discharge port, 14-a butt joint lug, 15-an outer ring and 16-a silica gel pad.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a precise constant burette for an inspection and detection center comprises a burette, the burette comprises a burette body 1 and a burette head 2 arranged at the lower end of the burette body 1 in a threaded manner, a sealing ring 3 is movably arranged at the joint of the burette body 1 and the burette head 2 movably arranged at the burette body 1, a first threaded notch 4 is arranged at the lower end of the burette body 1, a second threaded notch 5 matched with the first threaded notch 4 is arranged at the upper end of the burette head 2, the sealing ring 3 is arranged at the joint of the first threaded notch 4 and the second threaded notch 5, a liquid guide inner cavity 6 is formed inside the burette head 2, a liquid outlet 7 is arranged at the tail end of the burette head 2, an adjusting pipe 8 is formed at the middle part of the burette head 2 in a machining manner, the adjusting pipe 8 is integrally formed with the burette head 2, an adjusting cavity channel 9 is arranged inside the burette head 2, openings 10 are arranged at both ends of the adjusting cavity channel 9, and adjusting plugs 11 are movably arranged inside the adjusting cavity channel, the two ends of the adjusting plug 11 are provided with pull rings 12, the two groups of pull rings 12 are positioned at the opening 10, the surface of the adjusting plug 11 is provided with a liquid discharge port 13, when the head of the burette needs to be replaced or cleaned, the position of the sealing ring 3 is adjusted and separated from the joint of the first thread notch 4 and the second thread notch 5, then the lower dropper 2 is rotated to be detached, then the burette body 1 and the dropper 2 are cleaned respectively, the pull ring 12 at the left side is kept in contact with the opening 10 in a conventional state, the liquid discharge port 13 of the adjusting plug 11 is not in the liquid guide inner cavity 6 at the moment, the dropper 2 keeps in a sealing state, when the dropper 2 needs to be dripped, a user can pull the pull ring 12 at the left side to enable the liquid discharge port 13 of the adjusting plug 11 to be positioned in the liquid guide inner cavity 6, so as to achieve the purpose of liquid discharge, when the pull ring 12 at the right side is in contact with the opening 10, at this time, drain port 13 is in the maximum state.

And (4) supplementary notes: the abluent position of dripper 2 is mainly the position of adjusting the upper end of stopper 11 and buret body 1 intercommunication, makes the capacity of buret more accurate after the washing.

Further improved, as shown in fig. 2: the bottom of the first thread notch 4 and the top of the second thread notch 5 are both processed and formed with butt-joint convex blocks 14, the two groups of butt-joint convex blocks 14 are of convex arc-shaped structures, and the convex butt-joint convex blocks 14 designed at the bottom of the first thread notch 4 and the top of the second thread notch 5 can be precisely attached to the inner wall of the silica gel pad 16 on the outer side, so that a better sealing effect is achieved.

Further improved, as shown in fig. 4: the sealing ring 3 comprises an outer ring 15 and a silica gel pad 16 embedded in the outer ring 15, the silica gel pad 16 is of an annular structure, the inner diameter of the silica gel pad is smaller than the outer diameter of the butt joint bump 14, and the joint of the burette pipe body 1 and the dripper 2 is subjected to extrusion sealing treatment through the silica gel pad 16 on the inner side by adjusting the position of the sealing ring 3.

In a further improvement, as shown in fig. 3: the adjusting cavity 9 is of a U-shaped structure, and the corners of the adjusting cavity are of smooth arc structures, so that the position of the adjusting plug 11 can be conveniently adjusted by a user.

Further improved, as shown in fig. 5: the adjusting plug 11 is made of soft PVC material, the length of the adjusting plug is larger than that of the adjusting cavity 9, the inner diameter of the adjusting plug 11 is equal to that of the adjusting cavity 9, the position of the adjusting plug 11 can be adjusted conveniently in the design mode under the condition that the sealing state of the adjusting cavity 9 is kept, and the PVC soft crystal plate has the characteristics of heat resistance, cold resistance, ageing resistance, weight pressure resistance and strong acid and alkali resistance.

Further improved, as shown in fig. 5: drain outlet 13 is the triangle column structure and sets up in regulation stopper 11 central line right side, and the great one end of internal diameter of drain outlet 13 is the arc structure, designs drain outlet 13 for the triangle column structure and from a left side to right opening diameter crescent, can adjust the opening position of regulation stopper 11 through pull ring 12 as required user to the speed of control liquid downflow.

Specifically, the end of the liquid dropper 2 is in a conical structure, and the outer diameter of the main body part is equal to half of the outer diameter of the adjusting pipe 8, so that the adjusting plug 11 can be conveniently installed and used.

When in use: when the head of the burette needs to be replaced or the burette needs to be cleaned, the position of the sealing ring 3 is adjusted and separated from the connection part of the first thread notch 4 and the second thread notch 5, then the lower dropper 2 is rotated to be detached, then the burette body 1 and the dropper 2 are respectively cleaned, the pull ring 12 on the left side is kept in contact with the opening 10 under the conventional state, the liquid discharge port 13 of the adjusting plug 11 is not in the liquid guide inner cavity 6, the dropper 2 is kept in the sealing state, when the dropper 2 needs to be dripped, a user can enable the liquid discharge port 13 of the adjusting plug 11 to be positioned in the liquid guide inner cavity 6 by pulling the pull ring 12 on the left side, so that the liquid discharge purpose is achieved, and when the pull ring 12 on the right side is in contact with the opening 10, the liquid discharge port 13 is in the maximum state.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a precision constant buret that inspection detection center used, includes buret, its characterized in that: the burette comprises a burette body (1) and a burette head (2) which is arranged at the lower end of the burette body (1) in a threaded manner, wherein a sealing ring (3) is movably arranged at the joint of the burette body (1) and the burette head (2) which is movably arranged at the burette body (1), a threaded notch I (4) is arranged at the lower end of the burette body (1), a threaded notch II (5) which is matched with the threaded notch I (4) for use is arranged at the upper end of the burette head (2), the sealing ring (3) is arranged at the joint of the threaded notch I (4) and the threaded notch II (5), a liquid guide inner cavity (6) is formed inside the burette head (2) and a liquid outlet (7) is arranged at the tail end of the burette head, a regulating pipe (8) is formed at the middle part of the burette head (2) in a machining manner, the regulating pipe (8) is integrally formed with the burette head (2) and a regulating cavity (9) is arranged inside the regulating pipe, adjust the both ends that the chamber said (9) all to be provided with opening (10) and inside activity and be provided with and adjust stopper (11), pull ring (12) are installed at the both ends of adjusting stopper (11), and are two sets of pull ring (12) are located opening (10) department, leakage fluid dram (13) have been seted up on the surface of adjusting stopper (11), it is level and smooth arc structure to adjust chamber way (9) to be U type structure and corner, it adopts soft PVC material and length to be greater than the length of adjusting chamber way (9) to adjust stopper (11), the internal diameter of adjusting stopper (11) equals the internal diameter of adjusting chamber way (9), leakage fluid dram (13) are three horn-shaped structures and set up in and adjust stopper (11) central line right side, the great one end of internal diameter of leakage fluid dram (13) is the arc structure.

2. A precision constant burette for an inspection and testing center according to claim 1, wherein: butt-joint convex blocks (14) are formed at the bottom of the first thread notch (4) and the top of the second thread notch (5) in a machining mode, and the two groups of butt-joint convex blocks (14) are of convex cambered surface structures.

3. A precision constant burette for an inspection and testing center according to claim 2, wherein: sealing ring (3) include outer ring (15) and inlay silica gel pad (16) in outer ring (15) inside, silica gel pad (16) are ring structure and internal diameter and are less than the external diameter of butt joint lug (14).

4. A precision constant burette for an inspection and testing center according to claim 1, wherein: the tail end of the liquid dropping head (2) is of a conical structure, and the outer diameter of the main body part is equal to half of the outer diameter of the adjusting pipe (8).