CN219580572U

CN219580572U - Water mercury detection digestion constant volume pipe

Info

Publication number: CN219580572U
Application number: CN202320201696.9U
Authority: CN
Inventors: 李艳苹; 王翠翠; 刘小骐; 高艾
Original assignee: Tianjin Institute of Seawater Desalination and Multipurpose Utilization MNR
Current assignee: Tianjin Institute of Seawater Desalination and Multipurpose Utilization MNR
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-08-25
Anticipated expiration: 2033-02-13

Abstract

The utility model belongs to laboratory digestion equipment, and discloses a water mercury detection digestion constant volume pipe, which comprises a pipe body and a pipe plug, wherein the pipe plug is provided with a middle channel, and the middle channel is communicated from the top end to the bottom end of the pipe plug; the pipe plug is provided with a cock, the cock divides the middle channel into an upper half section and a lower half section, and the upper half section and the lower half section are gradually thickened from bottom to top and then gradually thinned; the cock comprises an intermediate body for inserting the cock, the intermediate body being provided with a communication hole; the connection or disconnection of the intermediate passage can be controlled by rotating the intermediate body to change the angle of the communication hole; one end of the intermediate body is provided with a handle, and the other end is provided with a nut, a gasket and a rubber ring. The utility model rotates the cock at any time to open and close the communication hole, thereby avoiding the escape of a large amount of samples and secondary pollution, simultaneously facilitating the integrated operation of digestion, deflation and constant volume, being safe and reliable and ensuring the accuracy and recovery rate of detection.

Description

Water mercury detection digestion constant volume pipe

Technical Field

The utility model belongs to laboratory digestion equipment, and particularly relates to a digestion constant volume pipe.

Background

Wet digestion is a common method for pretreatment of laboratory sample heavy metal detection, and is a simple, convenient and effective sample pretreatment means in heavy metal element analysis. When testing environmental water quality samples, preparing a mercury sample, namely weighing a filtered or unfiltered sample in a colorimetric tube, adding a certain amount of hydrochloric acid-nitric acid mixed solution, adding a plug, uniformly mixing, placing in a boiling water bath, heating and digesting for 1h, shaking for 1-2 times, and uncovering for deflation. In the digestion process, the temperature of the tube body of the colorimetric tube is high, and the colorimetric tube is convenient to operate because the tube body is rocked for 1-2 times and is opened for deflation. In the digestion process, the air pressure in the pipe is continuously increased, and the pipe plug directly covered on the pipe body is easily jacked up by the acid mist in the pipe and then popped up, so that the pipe plug has certain potential safety hazard for operators. At present, some digestion pipes are provided with a first pipe plug and a second pipe plug which are respectively used for digesting two different stages of acid removal and constant volume, and the digestion pipes are complex in design and easy to introduce pollution; still have the arch in some tube cap bottom designs of clearing up the pipe, have the clearance between the inner wall of arch and body, have the exhaust hole on the tube cap, when the internal atmospheric pressure of body is too big in the digestion process, lean on atmospheric pressure to push up tube cap edge, then the tube cap falls back to the normal position again automatically, and such design also has the tube cap to pop out the risk that drops.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the water mercury detection digestion constant volume pipe, which can greatly improve the simplicity and safety of operation and improve the detection accuracy.

The utility model is realized by the following technical scheme:

the utility model provides a water mercury detection digestion constant volume pipe, which comprises a pipe body and a pipe plug, wherein an inserting part at the bottom of the pipe plug is used for being inserted into a pipe opening part at the top of the pipe body, so that the pipe plug seals the pipe body; the pipe plug is provided with an intermediate channel which is communicated from the top end to the bottom end of the pipe plug; the pipe plug is provided with a cock, and the cock is perpendicular to the axis of the middle channel; the middle channel is divided into an upper half section and a lower half section by the cock, the inner diameter of the lower half section is gradually increased from the bottom end of the pipe plug to the cock and then gradually decreased, and the inner diameter of the upper half section is gradually increased from the cock to the top end of the pipe plug and then gradually decreased;

the cock comprises an intermediate body for inserting the plug, the intermediate body being provided with a communication hole penetrating in a radial direction thereof; by rotating the intermediate body to change the angle of the communication hole, the connection or disconnection of the intermediate passage can be controlled; the two ends of the intermediate body are respectively provided with a handle and a nut, the handles are used for applying force to the intermediate body to enable the intermediate body to rotate, the nuts are used for limiting the axial direction of the intermediate body, and gaskets and rubber rings are arranged between the nuts and the pipe plugs.

Further, the tube body is provided with scale marks, the number range of the scale marks is 5 mL-20 mL, and the minimum scale is 1mL.

Further, the inner wall of the pipe orifice part at the top of the pipe body is provided with a frosting surface.

Further, the plug-in portion at the bottom of the pipe plug is provided with a frosted surface.

Further, the middle part of the plug is provided with a transverse through hole for passing through the middle body of the cock, and the middle body can rotate in the transverse through hole.

Further, the intermediate body, the handle, the nut and the gasket are all made of polytetrafluoroethylene.

The beneficial effects of the utility model are as follows:

the water mercury detection digestion constant volume pipe has a simple structure and ingenious design, and can control the communication between the inside and the outside of the pipe body through the cock in the digestion process, so that the balance of the atmospheric pressure inside and outside the pipe body is ensured, acid mist in the digestion process is conveniently discharged, and the pipe plug is prevented from being ejected when the atmospheric pressure inside the pipe body is overlarge; the condensed liquid in the digestion process can flow back to the pipe body through the slender middle channel, so that the opportunity of the condensed liquid flowing out of the pipe is greatly reduced; meanwhile, the tube body is provided with multiple scales, so that the constant volume after digestion and cooling is facilitated. In conclusion, the utility model can rotate the cock to open and close the communication hole at any time, thereby avoiding a great amount of sample escaping and secondary pollution, facilitating digestion, deflation and constant volume integrated operation, being safe and reliable and ensuring the accuracy and recovery rate of detection.

Drawings

FIG. 1 is a schematic diagram of a water quality mercury detection digestion constant volume pipe provided by the utility model;

fig. 2 is a schematic cross-sectional view of a plug in a water mercury detection digestion constant volume pipe provided by the utility model.

In the figure: 1. a tube body; 2. a pipe opening; 3. a scale mark; 4. a pipe plug; 5. an intermediate channel; 6. a plug-in part; 7. a cock; 8. a nut; 9. a rubber ring; 10. a gasket; 11. a communication hole; 12. an intermediate; 13. a handle.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

As shown in fig. 1 to 2, the embodiment provides a water quality mercury detection digestion constant volume pipe, which mainly comprises a pipe body 1, a pipe plug 4 and a cock 7, wherein the bottom of the pipe plug 4 can be inserted into an opening at the top of the pipe body 1, the opening at the top of the pipe body 1 is plugged, and the cock 7 is used for adjusting the pipe plug 4.

As a preferred embodiment, the inner wall of the pipe mouth part 2 at the top of the pipe body 1 is provided with a frosted surface, so that the pipe mouth part 2 and the bottom of the pipe plug 4 can be closely attached.

As a preferred embodiment, the tube body 1 is provided with a scale mark 3, the number range of the scale mark 3 is 5 mL-20 mL, the main scale mark is provided with 5mL, 10mL, 15mL and 20mL, and the minimum scale is 1mL, so that the tube body is convenient for fixing the volume and various volumes after digestion.

As a preferred embodiment, the outer wall of the insertion part 6 at the bottom of the pipe plug 4 is provided with a frosted surface, so that the bottom of the pipe plug 4 can be closely attached to the pipe mouth part 2.

The plug 4 is provided with an intermediate channel 5, the intermediate channel 5 being through from the top to the bottom of the plug 4. The plug 4 is also provided with a cylindrical or conical transverse through hole, axially perpendicular to the intermediate channel 5, for mounting a cylindrical or conical tap 7. The middle channel 5 of the pipe plug 4 is divided into an upper half section and a lower half section by a transverse through hole, the inner diameter of the lower half section is gradually increased from the bottom end of the pipe plug 4 to the cock 7 and then gradually decreased, and the inner diameter of the upper half section is also gradually increased from the cock 7 to the top end of the pipe plug 4 and then gradually decreased.

The tap 7 comprises an intermediate body 12, a handle 13, a nut 8, a rubber ring 9, a gasket 10.

The intermediate body 12 is matched to and rotatable within a transverse through hole of the pipe plug 4. The intermediate body 12 is provided with a communication hole 11 with a diameter of 2mm, and the communication hole 11 penetrates through the intermediate body 12 in the radial direction; the connection or disconnection of the intermediate passage 5 can be controlled by changing the angle of the communication hole 11 by rotation of the cock 7. Specifically, when the intermediate body 12 rotates to the point that the communication hole 11 is axially identical to the intermediate passage 5, the upper half section and the lower half section of the intermediate passage 5 are communicated; when the intermediate body 12 rotates until the communication hole 11 is axially different from the intermediate passage 5, the upper half section and the lower half section of the intermediate passage 5 are disconnected.

A handle 13 is provided at one end of the intermediate body 12 and is located outside the transverse through hole for facilitating the application of force to the intermediate body 12 for effective rotation.

The nut 8, the rubber ring 9, the washer 10 are arranged at the other end of the intermediate body 12 and are located outside the transverse through hole. The nut 8 is used for limiting the cock 7, the gasket 10 is arranged between the nut 8 and the pipe plug 4, and the rubber ring 9 is used for sealing between the nut 8 and the gasket 10.

Preferably, the parts of the tap 7 other than the rubber ring 9, including the intermediate body 12, the handle 13, the nut 8 and the washer 10 are made of polytetrafluoroethylene.

Therefore, according to the water mercury detection digestion constant volume pipe, the pipe plug 4 can seal the opening of the digestion pipe body, the communicating hole 11 of the pipe plug 4 is controlled to be connected or disconnected with the middle channel 5 of the pipe plug 4 by rotating the cock 7 arranged on the pipe plug 4, so that whether the inside and the outside of the pipe body 1 are communicated or not is kept, acid mist generated in the digestion process can be conveniently and timely discharged, the pipe plug 4 is prevented from being broken or burst when the air pressure in the pipe body is overlarge, and unsafe conditions to detection personnel are avoided. The middle channel 5 that the pipe plug 4 set up, its internal diameter is from pipe plug 4 bottom to the top thickness different, guarantees that the most liquid that condenses in the digestion process can flow back effectively. The utility model has simple and convenient operation, can complete the integrated operations of digestion, deflation and constant volume of the sample, can avoid a great deal of sample steam from escaping from the tube body, and can also ensure the safety of detection personnel and the accuracy of detection results.

While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.

Claims

1. The water mercury detection digestion constant volume pipe comprises a pipe body and a pipe plug, wherein an inserting part at the bottom of the pipe plug is used for being inserted into a pipe opening at the top of the pipe body, so that the pipe plug seals the pipe body; the pipe plug is characterized in that the pipe plug is provided with an intermediate channel, and the intermediate channel is communicated from the top end to the bottom end of the pipe plug; the pipe plug is provided with a cock, and the cock is perpendicular to the axis of the middle channel; the middle channel is divided into an upper half section and a lower half section by the cock, the inner diameter of the lower half section is gradually increased from the bottom end of the pipe plug to the cock and then gradually decreased, and the inner diameter of the upper half section is gradually increased from the cock to the top end of the pipe plug and then gradually decreased;

2. The water quality mercury detection digestion constant volume pipe according to claim 1, wherein the pipe body is provided with scale marks, the number range of the scale marks is 5 mL-20 mL, and the minimum scale is 1mL.

3. The water quality mercury detection digestion constant volume pipe according to claim 1, wherein the inner wall of the pipe orifice at the top of the pipe body is provided with a frosting surface.

4. The water mercury detection digestion constant volume pipe of claim 1, wherein the plug portion at the bottom of the pipe plug is provided with a frosted surface.

5. The water quality mercury detection digestion constant volume pipe according to claim 1, wherein a transverse through hole is formed in the middle of the pipe plug and is used for penetrating through the middle body of the cock, and the middle body can rotate in the transverse through hole.

6. The water mercury detection digestion constant volume tube of claim 1, wherein the intermediate, the handle, the nut and the gasket are made of polytetrafluoroethylene.