CN216695804U

CN216695804U - Constant-pressure sealed anti-overflow chemical oxygen demand digestion pipe

Info

Publication number: CN216695804U
Application number: CN202123119037.0U
Authority: CN
Inventors: 邱晓国; 颜涛; 王德明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-06-07
Anticipated expiration: 2031-12-13

Abstract

The utility model provides a sealed chemical oxygen demand who prevents excessive top of level pressure clears up pipe, includes pipe, stopper, cap and spring four bibliographic categories branch, the upper portion of pipe establish the stopper, the stopper is gone up and is put the spring, spring top sleeve cap, the lower extreme inboard of cap sets up in a plurality of caps card protruding, the upper portion outside of pipe sets up a plurality of mouth of pipe card protruding, the diameter of the circle that the protruding inboard of card enclosed in the cap is greater than the external diameter of pipe and is less than the diameter of the circle that the protruding outside of mouth of pipe card enclosed, the diameter of the circle that the protruding outside of card enclosed in the cap is cap chamber diameter promptly and is greater than the diameter of the circle that the protruding outside of mouth of pipe card enclosed, the cap passes through protruding and the protruding activity joint of mouth of pipe card in the cap with the pipe, the upper portion inboard of pipe is the dull polish mouth of pipe, the lower part outside of stopper is the dull polish cock body, the mouth of pipe closely cooperates with the dull polish cock body, guarantee to clear up the leakproofness of pipe. In the heating process of the fast digestion method, the plug keeps consistent and high-degree sealing on the pipe all the time under the continuous pressure of the spring, so that the overflow of solution and steam in the pipe is avoided, and the precision and the accuracy of the chemical oxygen demand measurement are improved.

Description

Constant-pressure sealed anti-overflow chemical oxygen demand digestion pipe

Technical Field

The utility model relates to a chemical oxygen demand digestion tube, in particular to a constant-pressure sealed anti-overflow heating digestion tube, and belongs to the technical field of ecological environment monitoring.

Background

Chemical Oxygen Demand (COD) is an important comprehensive index for representing the pollution of a water body by reducing substances (mainly organic matters), is one of water environment pollutant emission total amount control indexes which are brought into check in China, and becomes an important index for evaluating water environment quality and monitoring pollution source emission in China.

The rapid digestion spectrophotometry (HJ/T399-2007) for determining the chemical oxygen demand of water quality is widely used due to the advantages of simple operation, safety, stability, accuracy, reliability, small energy consumption, small reagent dosage, less secondary pollution, small occupied space, convenient carrying, suitability for large-scale determination and the like. But the heating digestion tube in the standard adopts the sealing cover with internal threads to seal, the sealing effect is inconsistent when screwing, and the digestion tube and the sealing cover are aged to cause the problem of untight sealing after being heated for many times, so that digestion liquid overflows in the heating process, the precision is reduced, and the accuracy is influenced.

Disclosure of Invention

The utility model provides a constant-pressure sealed anti-overflow chemical oxygen demand digestion pipe for solving the problems in the background technology.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a pipe is cleared up to sealed chemical oxygen demand who prevents excessive top of level pressure, includes pipe, stopper, cap and spring four bibliographic categories branch, the upper portion of pipe establish the stopper, the stopper is gone up and is put the spring, spring top sleeve cap, the lower extreme inboard of cap set up a plurality of caps in the card protruding enclose into the cap chamber by the cap in, the upper portion outside of pipe set up a plurality of mouth of pipe card protruding, the cap in the diameter of the protruding inboard circle of enclosing of card be greater than the external diameter of pipe and be less than the protruding outside diameter of the circle of enclosing of mouth of pipe card, the cap in the diameter of the protruding outside circle of enclosing of card be greater than the diameter of the protruding outside circle of mouth of pipe card promptly cap chamber diameter, cap and pipe pass through protruding and the protruding activity joint of mouth of pipe card in the cap.

According to the utility model, the inner side of the upper part of the pipe is provided with the frosted pipe orifice, the outer side of the lower part of the plug is provided with the frosted plug body, and the frosted pipe orifice is tightly matched with the frosted plug body, so that the sealing property of the digestion pipe is improved.

According to the utility model, the number of the clamping protrusions in the cap is preferably more than or equal to 2, and the clamping protrusions are uniformly distributed at the inner lower end of the cap, so that the cap is prevented from inclining on the pipe, the leakproofness of the digestion pipe is prevented from being influenced, and the operation difficulty is increased.

According to the utility model, the diameter of the plug head at the upper part of the plug is preferably smaller than that of the cap cavity and larger than that of a circle formed by the inner sides of the clamping protrusions in the cap, and the plug head is clamped in the cap cavity and integrated with the cap, so that linkage is increased.

According to a further preferred embodiment of the present invention, the natural length of the spring under unpressurized condition is larger than the distance between the top end of the plug head and the top end of the cap cavity, and the plug head is clamped in the cap cavity and is subjected to the elastic pressure of the spring, so that the plug head is not easy to fall off from the cap.

When the chemical oxygen demand digestion tube with constant pressure sealing and anti-overflow is used and the chemical oxygen demand is analyzed and measured by adopting a rapid digestion spectrophotometry, a sample is added into the tube, the cap and the tube orifice clamping protrusion are plugged on the tube, the tube is rotated and pressed downwards, when the clamping protrusion in the cap is aligned with the gap of the tube orifice clamping protrusion, because the diameter of a circle enclosed by the inner side of the clamping protrusion in the cap is larger than the outer diameter of the tube, and the diameter of a circle enclosed by the outer side of the clamping protrusion in the cap, namely the diameter of a cap cavity, is larger than the diameter of a circle enclosed by the outer side of the clamping protrusion in the tube orifice, the cap moves downwards along the tube and moves to the position that the clamping protrusion in the cap is lower than the clamping protrusion in the tube orifice, the cap is rotated, because the diameter of the circle enclosed by the inner side of the clamping protrusion in the cap is smaller than the diameter of the circle enclosed by the outer side of the clamping protrusion in the tube orifice, the clamping protrusion in the cap is clamped below the clamping protrusion, the spring is further pressed, the elasticity is increased, the plug is firmly pressed in the tube, and the frosted plug body is tightly matched with the frosted tube orifice, and the sealing effect is realized. When the heating is cleared up, the sealing effect can be continuously kept all the time as long as the compression elasticity of the spring is larger than the positive pressure generated in the pipe.

After the chemical oxygen demand analysis and determination, the cap is rotated, when the clamping protrusions in the cap are aligned with the clamping protrusions of the pipe orifice, the integrated cap and the plug can be easily popped out of the pipe under the action of the spring force, and then the digestion pipe can be cleaned.

The utility model has the beneficial effects that: in the heating process of the rapid digestion method, the plug keeps consistent and high-degree sealing on the pipe all the time under the continuous pressure of the spring, so that the overflow of solution and steam in the pipe is avoided, and the precision and the accuracy of chemical oxygen demand measurement are improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention at a front elevation.

Fig. 2 is a schematic view of the split structure at the front angle of the present invention.

Fig. 3 is a front upper view angle lower full split structure schematic diagram of the utility model.

Fig. 4 is a schematic view of a split structure from a front upper view of the present invention.

Wherein: the pipe comprises a pipe (1), a plug (2), a cap (3), a spring (4), a cap inner clamping protrusion (5), a pipe orifice clamping protrusion (6), a frosted pipe orifice (7), a frosted plug body (8), a plug head (9) and a cap cavity (10).

Detailed Description

The utility model is further illustrated with reference to the following figures and examples. The following examples are only for describing the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and the scope of the present invention is not limited thereto, and various modifications and improvements made without departing from the scope of the present invention fall within the scope of the present invention.

Example (b): as shown in figure 1, figure 2, figure 3 and figure 4, the constant pressure sealed chemical oxygen demand digestion pipe for preventing the overflow comprises four parts, namely a pipe (1), a plug (2), a cap (3) and a spring (4). The upper part of the pipe (1) is provided with a plug (2) on which a spring (4) is arranged, and the spring top is sleeved with a cap (3). The pipe joint is characterized in that 4 cap inner clamping protrusions (5) are arranged on the inner side of the lower end of a cap (3), the cap (3) is evenly distributed at the inner lower end, a cap cavity (10) is formed by the cap inner clamping protrusions (5) in the cap (3), 4 pipe orifice clamping protrusions (6) are arranged on the outer side of the upper portion of a pipe (1), the diameter of a circle formed by the inner side of the cap inner clamping protrusions (5) is larger than the outer diameter of the pipe (1) and smaller than the diameter of a circle formed by the outer side of the pipe orifice clamping protrusions (6), the diameter of the circle formed by the outer side of the cap inner clamping protrusions (5), namely the diameter of the cap cavity (10), is larger than the diameter of the circle formed by the outer side of the pipe orifice clamping protrusions (6), and the cap (3) and the pipe (1) are movably connected in a clamping mode through the cap inner clamping protrusions (5) and the pipe orifice clamping protrusions (6).

The upper portion inboard of pipe (1) be dull polish mouth of pipe (7), the lower part outside of stopper (2) be dull polish cock body (8), dull polish mouth of pipe (7) closely cooperate with dull polish cock body (8), increase and clear up the leakproofness of pipe. The diameter of the plug head (9) at the upper part of the plug (2) is smaller than that of the cap cavity (10) and larger than that of a circle formed by the inner sides of the clamping protrusions (5) in the cap, the plug head (9) is clamped in the cap cavity (10), the plug (2) and the cap (3) are integrated, and linkage is achieved in operation.

The natural length of the spring (4) under the unpressurized condition is larger than the distance between the top end of the plug head (9) and the top end of the cap cavity (10), and the plug head (9) is clamped into the cap cavity (10) and then is subjected to the elastic pressure of the spring (4), so that the plug head is not easy to fall out of the cap cavity (10).

When the chemical oxygen demand digestion tube with constant pressure sealing and anti-overflow is used and the chemical oxygen demand is analyzed and measured by adopting a rapid digestion spectrophotometry, a sample is added into the tube (1), the cap (3) and the integrated plug (2) are arranged on the tube (1), the cap (3) is rotated and pressed downwards, when the cap inner clamping projection (5) is aligned with the gap of the pipe orifice clamping projection (6), because the diameter of a circle formed by the inner side of the cap inner clamping projection (5) is larger than the outer diameter of the tube (1), the diameter of the circle formed by the outer side of the cap inner clamping projection (5), namely the diameter of the cap cavity (10), is larger than the diameter of the circle formed by the outer side of the pipe orifice clamping projection (6), the cap (3) moves downwards along the tube (1) and moves until the inner clamping projection (5) is lower than the pipe orifice clamping projection (6), the cap (3) is rotated, because the diameter of the circle formed by the inner side of the cap inner clamping projection (5) is smaller than the diameter of the circle formed by the outer side of the pipe orifice clamping projection (6), protruding (5) card of card in the cap is in mouth of pipe card (6) below, and spring (4) further pressurized this moment, and elastic pressure increases, firmly presses stopper (2) in pipe (1), and dull polish cock body (8) closely cooperate with dull polish mouth of pipe (7), realize highly sealed effect. When the pipe is heated and cleared up, the sealing effect can be continuously kept all the time as long as the elastic pressure of the spring (4) is greater than the internal pressure of the pipe (1).

After the chemical oxygen demand analysis and determination, the cap (3) is rotated, when the gap between the clamping protrusion (5) in the cap and the clamping protrusion (6) of the pipe orifice is aligned, the cap (3) and the plug (2) are integrated and are easily popped out from the pipe (1) under the action of the elastic force of the spring (4), and the digestion pipe can be cleaned.

The utility model has the beneficial effects that: in the heating process of the rapid digestion method, the plug (2) always keeps consistent and high-degree sealing on the pipe (1) under the continuous pressure of the spring (4), so that the overflow of solution and steam in the pipe (1) is avoided, and the precision and the accuracy of chemical oxygen demand measurement are improved.

Claims

1. The utility model provides a chemical oxygen demand that constant pressure is sealed prevents excessive top is cleared up and is managed which characterized in that: the pipe comprises a pipe, a plug, a cap and a spring, wherein the plug is arranged on the upper portion of the pipe, the spring is arranged on the plug, and the spring is sleeved on the cap, a plurality of cap inner clamping protrusions are arranged on the inner side of the lower end of the cap, a cap cavity is formed by the cap inner clamping protrusions in a surrounding mode, a plurality of pipe opening clamping protrusions are arranged on the outer side of the upper portion of the pipe, the diameter of a circle formed by the inner sides of the cap inner clamping protrusions is larger than the outer diameter of the pipe and smaller than the diameter of a circle formed by the outer sides of the pipe opening clamping protrusions, the diameter of the circle formed by the outer sides of the cap inner clamping protrusions, namely the diameter of the cap cavity, is larger than the diameter of the circle formed by the outer sides of the pipe opening clamping protrusions, and the cap and the pipe are movably clamped and connected with the pipe opening clamping protrusions through the cap inner clamping protrusions and the pipe opening clamping protrusions.

2. The digestion tube as set forth in claim 1, wherein: the pipe upper portion inboard be the dull polish mouth of pipe, the lower part outside of stopper be the dull polish cock body, the dull polish mouth of pipe closely cooperates with the dull polish cock body.

3. The digestion tube as set forth in claim 1, wherein: the number of the clamping protrusions in the cap is more than or equal to 2, and the clamping protrusions are uniformly distributed at the inner lower end of the cap.

4. The digestion tube as set forth in claim 1, wherein: the diameter of the plug head at the upper part of the plug is smaller than that of the cap cavity and larger than that of a circle enclosed by the inner side of the clamping protrusion in the cap, and the plug head is clamped in the cap cavity and is integrated with the cap.

5. The digestion tube as set forth in claim 4, wherein: the natural length of the spring under the unpressurized condition is larger than the distance between the top end of the plug head and the top end of the cap cavity.