Industrial ethylene glycol sampling bottle

Abstract

The utility model discloses an industrial ethylene glycol sampling bottle and belongs to the technical field of ethylene glycol sampling. The utility model discloses an industrial ethylene glycol sampling bottle which comprises a bottle body, the bottom of the bottle body is conical; a sample inlet is formed in the top point of the cone; the sample inlet is connected with one end of a sample inlet pipe; a blocking part is arranged at a bottle opening in the top of the bottle body; a sample outlet is formed in the center of the plugging part; an overflow pipe is inserted into the sample outlet; one end of the overflow pipe is positioned inside the bottle body, and the other end is positioned outside the bottle body; the bottom of the bottle body is further connected with a supporting protection structure. A notch is formed in the side part of the supporting and protecting structure, and the other end of the sample feeding pipe penetrates through the notch and is connected with an ethylene glycol storage tank. The sampling bottle disclosed by the utility model solves the technical problem that the ultraviolet light transmittance of an ethylene glycol sample at 220nm is reduced or is unqualified due to the fact that ethylene glycol is in full contact with air in the sampling process in the conventional sampling bottle.

Description

Technical Field

[0001] The utility model belongs to the technical field of ethylene glycol sampling, and relates to an ethylene glycol sampling bottle for industrial use. Background Art

[0002] Due to the specific chemical properties of ethylene glycol, the material of the sampling bottle needs to be chemically inert to avoid reacting with ethylene glycol and affecting the quality of the sample; with the increasing demand for industrial ethylene glycol and the improvement of environmental protection requirements, the requirements for sampling bottles will become more stringent. In the future, there may be more special sampling bottles for industrial ethylene glycol to meet specific sampling needs; at the same time, with the development of technology and the continuous emergence of new materials, the material and design of sampling bottles will also be further optimized to improve sampling efficiency and sample quality; currently, the sampling bottles for industrial ethylene glycol are basically ordinary open reagent bottles. The bottle body is usually cylindrical with a flat bottom, which is convenient for placement and stability. Some sampling bottles are marked with scales on the bottle body to facilitate measuring the volume of the sample. During the sampling process, the reagent bottle cap is directly opened, and the ethylene glycol sample comes into full contact with the air and naturally flows into the open reagent bottle for replacement and sampling. However, according to the measurement requirements of 8.2.2 in GB / T 14571.4-2022 "Test Methods for Industrial Ethylene Glycol - Part 4: Determination of Ultraviolet Transmittance - Ultraviolet Spectrophotometry", when there is dissolved oxygen (air) in the ethylene glycol sample, the dissolved oxygen associates with ethylene glycol, resulting in the absorption peak of ethylene glycol shifting towards the long-wavelength direction and the absorbance of ethylene glycol at 220 nm decreasing, thus causing the ultraviolet transmittance of the ethylene glycol sample at 220 nm to decrease or be lower than the standard and being unqualified. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an ethylene glycol sampling bottle for industrial use, which is used to solve the technical problem that the existing sampling bottle is prone to cause full contact between ethylene glycol and air during the sampling process, resulting in a decrease in the ultraviolet transmittance of the ethylene glycol sample at 220 nm or being unqualified.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses an ethylene glycol sampling bottle for industrial use, including a bottle body; the bottom of the bottle body is conical; a sampling inlet is opened at the vertex of the cone; one end of a sampling tube is connected to the sampling inlet; a sealing component is arranged at the bottle mouth at the top of the bottle body; a sampling outlet is opened at the center of the sealing component; an overflow tube is inserted into the sampling outlet; one end of the overflow tube is inside the bottle body, and the other end is outside the bottle body.

[0006] Furthermore, a support and protection structure is also connected to the bottom of the bottle body; a notch is opened on the side of the support and protection structure, and the other end of the sampling tube passes through the notch and is connected to an ethylene glycol storage tank.

[0007] Further, the port at the other end of the sampling tube is beveled.

[0008] Further, a piston is provided on the sampling tube.

[0009] Further, the plugging member is a bottle cap; the bottle cap is screwed and fastened to the bottle mouth at the top of the bottle body.

[0010] Further, a T-shaped sleeve is provided inside the bottle cap.

[0011] Further, the body shape of the bottle body is a cylinder.

[0012] Further, an overflow cover is provided at one end of the overflow tube outside the bottle body.

[0013] Further, the overflow cover is screwed and fastened to the overflow tube.

[0014] Further, the bottle body is made of light-shielding material.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model discloses an industrial ethylene glycol sampling bottle. By setting the bottom of the bottle body as a cone and opening a sampling port at the top of the cone, the sampling process is that the lower part of the industrial ethylene glycol sampling bottle is sampled until overflow. According to the principle of the exhaust method, the possibility of contact between air and ethylene glycol is excluded to the greatest extent, and the gas in the sampling bottle is effectively discharged, solving the technical problem that the existing sampling bottle is prone to cause full contact between ethylene glycol and air during the sampling process, resulting in a decrease or non-compliance of the ultraviolet transmittance of the ethylene glycol sample at 220 nm.

[0017] Further, for the industrial ethylene glycol sampling bottle of the utility model, before sampling, high-purity nitrogen is introduced through the lower sampling port for replacement to ensure that the inside of the bottle is a nitrogen environment, ensuring to a greater extent that the sampling process is not affected by air.

[0018] Further, the sampling port at the lower part of the industrial ethylene glycol sampling bottle of the utility model can also be used as a sample discharging port at the same time. When analyzing items such as ultraviolet transmittance and acidity affected by air, the sample can be discharged from the lower part to reduce the influence of air.

[0019] Further, the industrial ethylene glycol sampling bottle of the utility model is made of light-shielding material, which can reduce the influence of light and temperature during the sampling process. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the industrial ethylene glycol sampling bottle of the utility model;

[0021] Wherein: 1 - bottle body; 2 - sample inlet; 3 - sample inlet tube; 4 - sample inlet tube; 5 - overflow tube; 6 - support and protection structure; 7 - plugging component. Specific embodiments

[0022] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0024] The following further describes the present utility model in detail in conjunction with the drawings:

[0025] The present utility model discloses an industrial ethylene glycol sampling bottle, which solves the problem that industrial ethylene glycol is in full contact with air during the sampling process, resulting in a decrease or unqualified ultraviolet transmittance of the ethylene glycol sample at 220 nm; the industrial ethylene glycol sampling bottle is composed of a plugging component 7 and a bottle body 1, etc. Among them, the bottom of the bottle body 1 is set to be conical, and the whole sampling bottle adopts the method of sampling with lower air intake; among them, a sample outlet 4 is provided at the center of the plugging component 7, and an overflow tube 5 is inserted at the sample outlet 4; the sample inlet 2 and the sample inlet tube 3 are connected.

[0026] Specifically, as Figure 1 shown, the plugging component 7 adopted by the industrial ethylene glycol sampling bottle disclosed by the present utility model is a bottle cap. The bottle cap is internally provided with a T sleeve and a GL45 threaded mouth, and is screwed and fastened to the mouth of the bottle body 1 at the top; a hole is drilled in the middle of the bottle cap, and the overflow tube 5 is vertically installed tightly against the inner side of the bottle cap. One end of the overflow tube 5 is inside the bottle body 1, and the other end is outside the bottle body 1; the mouth of the overflow tube 5 is provided with a threaded mouth and a cover. When sampling, a polyethylene hose can be sleeved on the overflow tube 5 to divert to a waste liquid bucket;

[0027] The bottle body 1 is set to have an overall structure with a flat upper mouth, a cylindrical main body, and a conical lower mouth; a sampling port 2 is opened at the top of the conical part at the bottom of the bottle body 1, the sampling port 2 is connected to a sampling tube 3, the outer layer is a support and protection structure 6, there is a notch on one side of the support and protection structure 6, the sampling tube 3 extends out from this notch, a piston is arranged on the sampling tube 3 after it extends out, and the outlet of the sampling tube 3 is obliquely cut.

[0028] More specifically, the overall material of the industrial ethylene glycol sampling bottle of the present utility model is a light-shielding material, which can reduce the influence of light and temperature during the sampling process.

[0029] More specifically, the present utility model discloses the specific design dimensions of the above-mentioned industrial ethylene glycol sampling bottle, and application and performance research have been carried out based on this industrial ethylene glycol sampling bottle; the diameter of the overflow pipe 5 of the industrial ethylene glycol sampling bottle is 10 mm, the length of the overflow pipe 5 outside the bottle cap is 45 mm. When sampling, a φ10 mm polyethylene hose can be sleeved on the overflow pipe 5 to divert it to a waste liquid bucket; the radius r of the bottle body 1 is 40 mm, the height h = 210 mm (including the conical part at the bottom of the bottle), and the volume is 1000 ml (the height can be selected according to the volume requirement); a φ10 mm glass elbow is connected at the center point of the conical part at the bottom of the bottle body 1 as the sampling tube 3.

[0030] More specifically, the industrial ethylene glycol sampling bottle of the present utility model is made of a light-shielding material, which can reduce the influence of light and temperature during the sampling process.

[0031] The specific steps for sampling using the above-mentioned industrial ethylene glycol sampling bottle are as follows:

[0032] Step 1: Preparation before sampling

[0033] The sampling personnel clean the industrial ethylene glycol sampling bottle with demineralized water in the laboratory and dry it at 105 °C and cool it to room temperature. Open the overflow cover of the overflow pipe 5, turn the piston on the sampling tube 3, connect a φ10 mm polyethylene hose with an appropriate length to the sampling tube 3, connect this polyethylene hose to high-purity nitrogen, adjust the flow rate of high-purity nitrogen to about 1000 ml / min to displace the bottle body for at least 10 min. After the displacement is completed, tighten the overflow cover of the overflow pipe 5, turn off the piston on the sampling tube 3, and finally turn off the high-purity nitrogen.

[0034] Step 2: Sampling process

[0035] First, circulate the sampler of the ethylene glycol storage tank (with nitrogen seal) in the device area. Then, connect a φ10mm polyethylene hose of appropriate length with a reduced diameter to the φ4mm stainless steel pipe at the outlet of the ethylene glycol sampler. Open the sampling valve of the ethylene glycol sampler to displace the hose with the ethylene glycol sample. After the displacement is completed, close the sampling valve of the ethylene glycol sampler. Then, connect the other end of the displaced φ10mm polyethylene hose to the sampling tube 3. Open the piston on the sampling tube 3, open the sampling valve of the ethylene glycol sampler, and immediately open the overflow cover of the overflow pipe 5 and connect a diversion tube to the waste liquid bucket. Until the sampling bottle is filled with the sample and the sample overflows from the overflow pipe 5, close the sampling valve of the ethylene glycol sampler, close the piston on the sampling tube 3, and tighten the overflow cover of the overflow pipe 5, then the sampling operation is completed.

[0036] In order to detect analysis items such as the ultraviolet light transmittance and acidity of ethylene glycol that are affected by air, take the sample from the sample inlet at the bottom of the bottle. The specific operation is as follows: Open the overflow cover of the overflow pipe 5 and open the piston on the sampling tube 3 to obtain the sample (when detecting analysis items that are not affected by air, the upper cover of the sampling bottle can be directly unscrewed for sampling). The specific detection instruments and methods are as follows:

[0037] Instrument used: Lambda 365 ultraviolet spectrophotometer of PE Company.

[0038] Sampling bottles used: 1000mL ordinary blue-cap reagent bottles and the industrial ethylene glycol sampling bottle of the present utility model.

[0039] Detection method: GB / T14571.4-2022 "Test Methods for Industrial Ethylene Glycol - Part 4: Determination of Ultraviolet Light Transmittance - Ultraviolet Spectrophotometry" without blowing nitrogen.

[0040] Sampling method: For the 1000mL ordinary blue-cap reagent bottle, open the upper cover of the bottle normally, and let the sample flow into the bottle naturally for displacement and sampling until overflow; for the industrial ethylene glycol sampling bottle of the present utility model, sample according to the working principle in the specific and complete technical solution proposed in this patent.

[0041] Sample placement method during detection: For the 1000mL ordinary blue-cap reagent bottle, take the sample normally from the upper mouth of the bottle; for the industrial ethylene glycol sampling bottle of the present utility model, take the sample from the sample inlet at the bottom of the bottle.

[0042] Table 1 shows the statistical data of the light transmittance at 220 nm of industrial ethylene glycol samples taken by ordinary blue-capped reagent bottles and the industrial ethylene glycol sampling bottles of the present invention. It can be seen that when using the industrial ethylene glycol sampling bottles and sampling methods of the present invention for sampling industrial ethylene glycol, the ultraviolet light transmittance at 220 nm is increased by 1.0033% - 2.6241% compared with that of using ordinary sampling bottles. This fully demonstrates that using the industrial ethylene glycol sampling bottles of the present invention for sampling industrial ethylene glycol can effectively reduce the contact between air (oxygen) and the sample, greatly improve the ultraviolet light transmittance at 220 nm of the ethylene glycol sample, and ensure the accuracy and more representativeness of the analysis data.

[0043] Table 1 Light transmittance data at 220 nm of industrial ethylene glycol samples taken by ordinary sampling bottles and the industrial ethylene glycol sampling bottles of the present invention

[0044]

[0045] The above content is only to illustrate the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.

Claims

1. An industrial ethylene glycol sampling bottle, characterized in that: The bottle body (1) comprises a bottle body (1); the bottom of the bottle body (1) is conical; a sample inlet (2) is provided at the apex of the cone; the sample inlet (2) is connected to one end of a sample inlet tube (3); a blocking component (7) is provided at the bottle mouth at the top of the bottle body (1); a sample outlet (4) is provided at the center of the blocking component (7); an overflow pipe (5) is inserted into the sample outlet (4); one end of the overflow pipe (5) is located inside the bottle body (1) and the other end is located outside the bottle body (1); The bottom of the bottle body (1) is also connected to a supporting and protecting structure (6); a notch is provided on the side of the supporting and protecting structure (6), and the other end of the sample injection tube (3) passes through the notch and is connected to the ethylene glycol storage tank.

2. An industrial ethylene glycol sampling bottle according to claim 1, characterized in that: The port at the other end of the injection tube (3) is arranged to be beveled.

3. An industrial ethylene glycol sampling bottle according to claim 1, characterized in that: The sample injection tube (3) is provided with a piston.

4. An industrial ethylene glycol sampling bottle according to claim 1, characterized in that: The blocking component (7) is a bottle cap; the bottle cap is screw-fastened to the bottle mouth at the top of the bottle body (1).

5. An industrial ethylene glycol sampling bottle according to claim 4, characterized in that: A T sleeve is arranged inside the bottle cap.

6. An industrial ethylene glycol sampling bottle according to claim 1, characterized in that: The bottle body (1) is in the shape of a cylinder.

7. An industrial ethylene glycol sampling bottle according to claim 1, characterized in that: An overflow cap is provided on one end of the overflow pipe (5) located outside the bottle body (1).

8. An industrial ethylene glycol sampling bottle according to claim 7, wherein the overflow cover and the overflow pipe (5) are screw-fastened.

9. An industrial ethylene glycol sampling bottle according to claim 1, characterized in that: The bottle body (1) is made of light-proof material.

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