CN215065550U - An online liquid sampling device - Google Patents

Abstract

The utility model discloses an on-line liquid sampling device, which comprises a main pipeline and a side pipeline connected to the outer surface of the main pipeline. An included angle is left between the main pipeline and the side pipeline to form a Y-shaped pipe, and an upper port of the main pipeline is provided. The detachable seal is provided with a silicone gasket, the side pipe is connected with a diaphragm valve, the diaphragm valve can be connected to a vacuum-nitrogen replacement system, the end of the side pipe is connected with a normally closed valve, and the lower port of the main pipe The pipeline to be tested can be connected with a material valve, and the liquid to be tested circulates in the pipeline to be tested.

Description

Online liquid sampling equipment

Technical Field

The utility model relates to a sampling equipment, more specifically say a bit, relate to an online liquid sampling equipment, belong to the petrochemical field.

Background

During the production or research process, the sampling analysis of the liquid which is burnt or deteriorated when meeting air or moisture is often encountered. The operations related to the analysis of collected samples need protection of inert gases N2 and Ar for detecting the physicochemical properties of the substances. The sampling mode that generally adopts at present draws a branch pipe on the production pipeline, and the one end of branch pipe is connected a sampling container with withstand voltage emulsion tube, is connected with inert gas protection branch road on branch pipe and the sampling container. During sampling, all the branches are communicated firstly, and the whole system is replaced by inert gas for more than three times. In order to ensure the representativeness of the sample, the residual sample between the production pipeline and the branch pipe needs to be discharged before sampling, the operation is complex and time-consuming, each branch pipe also has a sealing problem when being connected, and the treatment of the waste sample also has the possibility of causing danger or environmental pollution.

SUMMERY OF THE UTILITY MODEL

In order to solve the prior art problem, the utility model provides an online liquid sampling equipment who has simple structure, can online sample, technical characterstic such as practicality is strong.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the utility model provides an online liquid sampling equipment, its characterized in that, includes trunk line and the side pipeline of intercommunication on the trunk line lateral surface, leave the contained angle in order to form Y type pipe between trunk line, side pipeline, trunk line upper port detachable is sealed to have the silica gel pad, the intercommunication has the diaphragm valve on the side pipeline, the diaphragm valve can connect vacuum-nitrogen gas replacement system, the end-to-end connection of side pipeline has the valve of normally closed, the lower port of trunk line can communicate the pipeline that awaits measuring that has the material valve, the circulation has the liquid that awaits measuring in the pipeline that awaits measuring.

Preferably, the silica gel pad overcoat is equipped with the lid, the lid is connected with the surface threaded connection of trunk line upper port in order to prevent that the silica gel pad from deviating from the trunk line upper port.

Preferably, a through hole is formed in the upper end face of the cover to expose part of the silica gel pad.

Preferably, the outer surface of the lower port of the main pipeline is provided with external threads so as to be conveniently in threaded connection with a pipeline to be tested.

Preferably, the main pipeline and the side pipeline are 304L stainless steel pipelines.

Preferably, the main pipeline and the side pipelines are welded.

Preferably, the main pipeline and the side pipelines are integrally formed.

Has the advantages that: the device is suitable for the on-line collection in the production and use processes of liquid which is sensitive to water and oxygen and burns or goes bad when meeting water and oxygen, and the sampling process of the sampling device is simple and easy to operate, convenient to clean and easy to carry.

Drawings

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

Detailed Description

The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following embodiments.

As shown in figure 1 is a specific embodiment of online liquid sampling equipment, this embodiment an online liquid sampling equipment, its characterized in that, including trunk line 1 and intercommunication side pipeline 2 on trunk line 1 lateral surface, trunk line 1, side pipeline 2 leave the contained angle in order to form Y type pipe 3 within a definite time, the sealed silica gel pad 4 that has of 1 up end detachable of trunk line, the intercommunication has diaphragm valve 5 on the side pipeline 2, and 2 ends of side pipeline are closed or inclosed, vacuum-nitrogen gas replacement system can be connected to diaphragm valve 5, the lower port of trunk line 1 can communicate the pipeline that awaits measuring that has the material valve, the circulation has the liquid that awaits measuring in the pipeline that awaits measuring.

4 overcoat of silica gel pad is equipped with lid 7, the surface threaded connection of lid 7 and trunk line 1 upper port is in order to prevent that silica gel pad 4 from deviating from trunk line 1 upper port set up the through-hole on the lid 7 up end in order to expose partial silica gel pad 4, be equipped with the external screw thread on the surface of trunk line 1 lower port so that with the pipeline threaded connection that awaits measuring, lid 7's design makes silica gel pad 4 can not drop when the pressurized, simple structure, and the practicality is strong.

The specific sampling process of the specific implementation mode is as follows: connecting an online liquid sampling device with a side pipeline (pipeline to be tested), opening a diaphragm valve 5 after ensuring that the system is sealed, keeping a material valve on the pipeline to be tested closed, externally connecting an interface of the diaphragm valve 5 with a vacuum-nitrogen replacement system, after nitrogen-vacuum replacement is carried out for more than three times, closing the diaphragm valve 5 and opening the material valve on the pipeline to be tested in a vacuum state, when the online liquid sampling device is filled with the liquid to be tested, measuring the liquid to be tested from the system by using a replaced needle cylinder through a silica gel pad 4 for related tests, then opening the diaphragm valve 5, pressing back the liquid of the online liquid sampling device into the pipeline to be tested by using nitrogen, then closing the material valve on the pipeline to be tested, closing the diaphragm valve 5, dismounting the vacuum-nitrogen replacement system, dismounting the online liquid sampling device from the side pipeline (pipeline to be tested) and cleaning for next use, and (4) finishing the whole sampling process, and ensuring that the liquid entering the online liquid sampling equipment to be detected does not exceed the height of the diaphragm valve 5 in order to return the liquid of the online liquid sampling equipment to the pipeline to be detected by high-utility nitrogen pressure.

Taking the sampling of trimethyl aluminum as an example, the material of the sealing spacer is puncture-resistant and corrosion-resistant silicon rubber (a silicon rubber pad 4), other parts of the device are made of 304L stainless steel, and the diaphragm valve is pressure-resistant and has controllable flow.

Taking out the online liquid sampling equipment, unscrewing the cover 7, putting in the silicon rubber 4, screwing the Y-shaped pipe 3, connecting the lower port of the main pipeline 1 with a TMA side pipeline (pipeline to be tested), opening the diaphragm valve 5 after ensuring the system is closed, keeping the material valve on the pipeline to be tested closed, and externally connecting the interface of the diaphragm valve 5 with a vacuum-nitrogen replacement system. After nitrogen-vacuum replacement is carried out for more than three times, the diaphragm valve 5 is closed under the vacuum state; opening a TMA valve on a side line, filling an online liquid sampling device, and quantitatively taking out the liquid to be tested from the system for related testing by using a displaced needle cylinder through a silica gel pad; and then opening the diaphragm valve 5, pressing back TMA into the side line and the storage tank by using nitrogen, closing a material valve on the pipeline to be tested, closing the diaphragm valve 5, disassembling the vacuum-nitrogen replacement system, disassembling the online liquid sampling equipment from the side line, and cleaning for the next use.

Diaphragm valve 4 principle: a flexible diaphragm or combined diaphragm is installed in valve body and valve cover, its closing part is a compression unit connected with diaphragm, and its valve seat can be made into weir form or can be the pipe wall of straight-through flow channel. The diaphragm valve has the advantages that the operating mechanism is separated from the medium channel, so that the purity of the working medium is ensured, and the possibility that the medium in the pipeline impacts the working part of the operating mechanism is also prevented. The diaphragm valve has simple structure and mainly consists of three main parts, namely a valve body, a diaphragm and a valve head assembly. The valve is easy to be disassembled and maintained quickly, and the replacement of the diaphragm can be completed on site in a short time. The commonly used diaphragm valves are classified into cast iron diaphragm valves, cast steel diaphragm valves, stainless steel diaphragm valves, plastic diaphragm valves, and diaphragm valves 4, which belong to the prior art and are not described in detail in this application.

In a preferred embodiment, the main pipeline 1 and the side pipeline 2 are 304L stainless steel pipelines.

In a preferred embodiment, the main pipeline 1 and the side pipeline 2 are welded. Or the main pipeline 1 and the side pipelines 2 are integrally formed, and the tail ends of the side pipelines 2 are connected with a normally closed valve 6, so that the cleaning is facilitated.

Finally, it should be noted that the present invention is not limited to the above embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.

Claims (8)

1. The utility model provides an online liquid sampling equipment, its characterized in that includes trunk line (1) and communicates side pipeline (2) on trunk line (1) lateral surface, leave the contained angle in order to form Y type pipe (3) between trunk line (1), side pipeline (2), trunk line (1) upper end mouth detachable is sealed has silica gel pad (4), be connected with diaphragm valve (5) on side pipeline (2), vacuum-nitrogen gas replacement system can be connected in diaphragm valve (5), the lower port of trunk line (1) can communicate the pipeline that awaits measuring that has the material valve, the circulation has the liquid that awaits measuring in the pipeline that awaits measuring.

2. The online liquid sampling device according to claim 1, wherein the silica gel pad (4) is sleeved with a cover (7), and the cover (7) is in threaded connection with the outer surface of the upper port of the main pipeline (1) to prevent the silica gel pad (4) from falling out of the upper port of the main pipeline (1).

3. An on-line liquid sampling device according to claim 2, characterized in that a through hole is opened on the upper end face of the cover (7) to expose part of the silica gel pad (4).

4. An on-line liquid sampling device according to claim 1, 2 or 3, characterized in that the outer surface of the lower end of the main pipe (1) is provided with external threads to facilitate the threaded connection with the pipe to be tested.

5. An on-line liquid sampling device according to claim 1, characterized in that the main pipe (1) and the side pipe (2) are 304L stainless steel pipes.

6. An on-line liquid sampling device according to claim 1, characterized in that the main pipe (1) and the side pipe (2) are welded to each other.

7. An on-line liquid sampling device according to claim 1, wherein the main pipe (1) and the side pipe (2) are integrally formed.

8. An on-line liquid sampling device according to claim 1, characterized in that the end of the side pipe (2) is connected with a normally closed valve (6).

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