CN210385910U

CN210385910U - A sealed reaction tube for water quality testing

Info

Publication number: CN210385910U
Application number: CN201920605692.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: Lanzhou Lianhua Environmental Protection Technology Co ltd; Beijing Lianhuayongxing Science And Technology Development Co ltd
Current assignee: Lanzhou Lianhua Environmental Protection Technology Co ltd; Beijing Lianhuayongxing Science And Technology Development Co ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-04-24
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses a sealed reaction tube for water quality detection, which comprises a tube body and a sealing cover, wherein the tube body comprises a tube body, a tube orifice and an external thread, the top end of the tube body is provided with the tube orifice, and the outer wall of the tube orifice is provided with the external thread; the inner wall of the sealing cover is provided with the internal thread and the gasket, the gasket is positioned at the top end of the internal thread, and the special gasket is arranged on the inner wall of the sealing cover, so that the gasket can seal a pipe opening, the effect of compensating and sealing is achieved, strong acid and strong base liquid in the pipe body can be completely isolated, and the service life of the sealing reaction pipe is greatly prolonged; the tube body is made of high borosilicate glass, and the special glass material has low expansion rate, high temperature resistance, high strength, high hardness, high light transmittance and high chemical stability. Ensures the hardness of the reaction tube body, can bear larger pressure and is not easy to damage.

Description

A sealed reaction tube for water quality testing

Technical Field

The utility model relates to a sealed reaction tube, specificly relate to a sealed reaction tube for water quality testing belongs to the water quality testing apparatus field.

Background

When the pollution indexes in the wastewater are measured, some detection indexes are often subjected to pretreatment in a sealed or pressurized state. Such as:

and (3) detecting COD index: when some water samples contain volatile organic compounds or low-boiling-point organic compounds, the samples must be pretreated by using a sealed reaction tube so as to avoid the organic compounds from overflowing to influence the measurement result.

And (3) total phosphorus index detection: the sample is sealed and pressurized by a high-pressure steam cooker, digestion pretreatment is carried out for 30min at the temperature of 120 ℃ under the pressure of 1.1kgf/cm2, and the potassium persulfate is ensured to fully oxidize phosphorus in the sample.

And (3) total nitrogen index detection: a high-pressure steam boiler is adopted to perform digestion pretreatment on the sample for 30min at the pressure (1.1-1.4) kgf/cm2 and the temperature (120-124 ℃), so that the basic potassium persulfate is ensured to convert nitrogen in the nitrogen-containing compounds in the sample into nitrate.

We invented a glass reaction tube with a threaded mouth. The reaction tube is sealed by screwing the threaded cap with the special sealing gasket on the glass reaction tube.

In the COD index testing process, the sealed reaction tube is screwed tightly to seal and then can ensure that volatile organic compounds or low-boiling organic compounds contained in the water sample can not overflow, simultaneously prevent the evaporation of water in the sample and ensure that the volume of the sample can not change.

When testing total phosphorus and total nitrogen indexes, the testing process can be simplified, the sealed reaction tube replaces a high-pressure steamer, and the required pressure can be achieved at the specified temperature. The operation process of the experiment is convenient, and the effect equivalent to that of the pressure cooker is achieved.

The problems of the prior art are as follows:

the sealed reaction tube in the prior art is easy to have the following problems:

1. the sealing performance is poor, and air leakage and pressure relief occur during pressurization;

2. the sealing gasket with the sealing function is easy to age and short in service life;

3. the pipe body is fragile, is easy to damage due to collision in use, and is easy to crack during pressurization.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current problem, provide a sealed reaction tube for water quality testing.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides a sealed reaction tube for water quality detection, which comprises a tube body and a sealing cover, wherein the tube body comprises a tube body, a tube orifice and an external thread, the tube orifice is arranged at the top end of the tube body, and the external thread is arranged on the outer wall of the tube orifice; the inner wall of the sealing cover is provided with an internal thread and a gasket, and the gasket is positioned at the top end of the internal thread.

As an optimal technical scheme of the utility model, the body with sealed lid passes through the external screw thread and interior thread connection.

As an optimized technical scheme of the utility model, the gasket with sealed lid passes through size fit or glue bonding is fixed.

As an optimized technical scheme of the utility model, the gasket includes elastic buffer layer and corrosion-resistant layer.

As an optimized technical scheme of the utility model, the elastic buffer layer adopts modified corrosion-resistant rubber to make, corrosion-resistant layer adopts the polytetrafluoroethylene material to make.

As an optimized technical scheme of the utility model, the body adopts borosilicate glass to make.

One side of the gasket, which is close to the pipe orifice, is provided with a convex arc structure pointing to the pipe orifice.

The utility model discloses the beneficial effect who reaches is: according to the sealed reaction tube for water quality detection, the special gasket is arranged on the inner wall of the sealing cover, so that the gasket can seal the tube opening to achieve the effect of compensation sealing, and can completely isolate strong acid and strong base liquid in the tube body, so that the service life of the sealed reaction tube is greatly prolonged; the tube body is made of high borosilicate glass, and the special glass material has low expansion rate, high temperature resistance, high strength, high hardness, high light transmittance and high chemical stability. Ensures the hardness of the reaction tube body, can bear larger pressure and is not easy to damage.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of an embodiment of the overall structure of the present invention;

fig. 2 is a schematic view of the tube structure of the present invention;

FIG. 3 is a schematic view of an embodiment of the sealing cover of the present invention;

fig. 4 is a schematic diagram of the gasket structure of the present invention;

fig. 5 is a schematic structural view of another embodiment of the gasket of the present invention;

fig. 6 is a schematic view of another embodiment of the overall structure of the present invention;

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example 1

As shown in fig. 1-6, the utility model provides a sealed reaction tube for water quality testing, which comprises a tube body 1 and a sealing cover 2, wherein the tube body 1 comprises a tube body 11, a tube orifice 12 and an external thread 13, the top end of the tube body 11 is provided with the tube orifice 12, and the outer wall of the tube orifice 12 is provided with the external thread 13; the inner wall of the sealing cover 2 is provided with the internal thread 21 and the gasket 22, the gasket 22 is positioned at the top end of the internal thread 21, and the special gasket is arranged on the inner wall of the sealing cover, so that the gasket can seal a pipe orifice to achieve the effect of compensation sealing, and can completely isolate strong acid and strong base liquid in the pipe body, and the service life of the sealing reaction pipe is greatly prolonged; the tube body is made of high borosilicate glass, and the special glass material has low expansion rate, high temperature resistance, high strength, high hardness, high light transmittance and high chemical stability. Ensures the hardness of the reaction tube body, can bear larger pressure and is not easy to damage.

The pipe body 1 and the sealing cover 2 are in threaded connection through the external thread 13 and the internal thread 21, and the external thread 13 and the internal thread 21 are in threaded connection, so that the sealing cover 2 and the pipe body 1 are convenient to seal and detach.

The gasket 22 and the sealing cover 2 are fixed by size matching or glue bonding, so that the gasket 22 is fixed on the inner wall of the sealing cover 2 conveniently.

The gasket 22 comprises an elastic buffer layer 221 and a corrosion-resistant layer 222, the elastic buffer layer 221 enables the gasket 22 to have good toughness and memory, not only has good deformability, but also can adapt to the shape of the pipe orifice of the reaction pipe, and plays a role in compensation and sealing; the gasket 22 has a sealing effect due to the corrosion-resistant layer 222, is not deformed due to high temperature, can reach 250 ℃ in theoretical use temperature, is within 200 ℃ in conventional experiment temperature, is inert to most chemicals and solvents, and can resist strong acid, strong alkali, water and various organic solvents; and the sample is not polluted.

The elastic buffer layer 221 is made of modified corrosion-resistant rubber, so that the elastic buffer layer has good toughness and memory, has good deformability, can adapt to the shape of the pipe orifice of the reaction pipe, and has a compensation sealing effect; the corrosion-resistant layer 222 is made of polytetrafluoroethylene materials, so that the corrosion-resistant layer plays a sealing role, is not deformed due to high temperature, can reach 250 ℃ in theoretical use temperature and within 200 ℃ in conventional experiment temperature, and shows inertia, strong acid and alkali resistance, water and various organic solvents for most chemicals and solvents; and the sample is not polluted.

The tube body 1 is made of high borosilicate glass, and the high borosilicate glass material is a special glass material with low expansion rate, high temperature resistance, high strength, high hardness, high light transmittance and high chemical stability, so that the hardness of the reaction tube body is ensured, and the reaction tube body can bear larger pressure and is not easy to damage.

The tube body is a sealed reaction tube for water quality detection, when the water quality in the tube body 1 needs to be sealed, when the external threads 13 on the outer wall of the tube opening 12 are matched with the internal threads 21 of the sealing cover 2, the tube opening 12 is gradually close to the gasket 22 in continuous rotation, and when the gasket 22 is contacted, the corrosion-resistant layer 222 of the gasket 22 is firstly contacted with the tube opening 12 and integrally covered on the whole surface of the tube opening 12 (the corrosion-resistant layer 222 is made of polytetrafluoroethylene, has a sealing effect, cannot be deformed due to high temperature, can reach 250 ℃ in theory, has a use temperature within 200 ℃ in a conventional experiment, shows inertia, can resist strong acid, strong alkali, water and various organic solvents, and cannot pollute samples). With the continuing of screwing, the pipe orifice 12 starts to compress the gasket 22, and at this time, the elastic buffer layer 221 on the upper layer starts to deform (the elastic buffer layer 221 is made of modified corrosion-resistant rubber, so that the elastic buffer layer has better toughness and memory, has better deformability, can adapt to the shape of the pipe orifice of the reaction pipe, has a compensation sealing effect, also has the capability of quickly recovering the original shape, and cannot deform due to long-term stress extrusion), and starts to compensate pressure according to the shape of the pipe orifice, so that the corrosion-resistant layer 222 on the lower layer is uniformly pressed on the pipe orifice 12, the reaction pipe is completely sealed, the 900Kpa pressure can be borne, and the experimental requirements are completely met. When the use is finished, the sealing cover 2 is unscrewed, and the gasket 22 is restored to the original shape immediately, so that the use can be repeatedly carried out.

The utility model discloses still include the second embodiment, gasket 22 is close to the one side of mouth of pipe 12 has the sensing the protruding arc structure 223 of mouth of pipe 12, this protruding arc structure 223 can with mouth of pipe 12 upper limb butt, as shown in figure 6, protruding arc structure 223 and corrosion resistant layer 222 integrated into one piece can shutoff mouth of pipe 12 well, avoid in the pipe liquid seepage flow to the thread gap, do benefit to the precision that improves water quality testing.

According to the sealed reaction tube for water quality detection, the special gasket is arranged on the inner wall of the sealing cover, so that the gasket can seal the tube opening to achieve the effect of compensation sealing, and can completely isolate strong acid and strong base liquid in the tube body, so that the service life of the sealed reaction tube is greatly prolonged; the tube body is made of high borosilicate glass, and the special glass material has low expansion rate, high temperature resistance, high strength, high hardness, high light transmittance and high chemical stability. Ensures the hardness of the reaction tube body, can bear larger pressure and is not easy to damage.

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 modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. 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. A sealed reaction tube for water quality detection comprises a tube body (1) and a sealing cover (2), and is characterized in that the tube body (1) comprises a tube body (11), a tube opening (12) and an external thread (13), the tube opening (12) is arranged at the top end of the tube body (11), and the external thread (13) is arranged on the outer wall of the tube opening (12);

the inner wall of the sealing cover (2) is provided with an internal thread (21) and a gasket (22), and the gasket (22) is positioned at the top end of the internal thread (21).

2. The sealed reaction tube for water quality inspection according to claim 1, wherein the tube body (1) and the sealing cap (2) are threadedly connected through the external thread (13) and the internal thread (21).

3. The sealed reaction tube for water quality detection as claimed in claim 1, wherein the gasket (22) is fixed with the sealing cover (2) by size fitting or glue bonding.

4. A sealed reaction tube for water quality inspection according to claim 3, wherein the gasket (22) comprises an elastic buffer layer (221) and a corrosion-resistant layer (222).

5. The sealed reaction tube for water quality detection as claimed in claim 4, wherein the elastic buffer layer (221) is made of modified corrosion-resistant rubber, and the corrosion-resistant layer (222) is made of polytetrafluoroethylene material.

6. The sealed reaction tube for water quality detection according to claim 1, wherein the tube body (1) is made of borosilicate glass.

7. The sealed reaction tube for water quality detection as claimed in claim 1, wherein a face of the gasket (22) near the nozzle (12) has a convex arc structure (223) directed toward the nozzle (12).