CN219434414U

CN219434414U - Needle type quantitative sampling structure

Info

Publication number: CN219434414U
Application number: CN202320228911.4U
Authority: CN
Inventors: 董落成
Original assignee: Nanjing Advanced Fluid Management Co ltd
Current assignee: Nanjing Advanced Fluid Management Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-07-28
Anticipated expiration: 2033-02-16

Abstract

The utility model belongs to the technical field of sampling, and particularly relates to a needle tube type quantitative sampling structure. The three-way pipe comprises a sampling needle pipe and a three-way component, wherein the three-way component comprises a three-way main body, a main channel of the three-way main body is connected with a pipeline of a medium to be sampled, a self-healing sealing gasket which can be pierced by the sampling needle pipe is arranged on a side channel of the three-way main body, a compression ring for extruding the self-healing sealing gasket is arranged at the end part of the side channel of the three-way main body, and a blocking head is arranged in the compression ring. The utility model has simple structure and lower cost, effectively reduces the risk of the medium contacting with air during sampling, and has good sampling effect on the liquid medium which is easy to react with the air.

Description

Needle type quantitative sampling structure

Technical Field

The utility model belongs to the technical field of sampling, and particularly relates to a needle tube type quantitative sampling structure.

Background

In the field of chemical equipment, the high-risk medium sampling mode on a pipeline is gradually improved at present, but the sampling mode has some problems in some special working conditions, for example, some special mediums in the pipeline can react immediately when encountering air, even a large amount of smoke and harmful gas can be generated, at the moment, the sampling requirement is smaller, the sampling quantity cannot be controlled, the sampling accuracy is affected, and great potential safety hazards are caused to people and the environment.

At present, the sampling mode commonly adopted on the pipeline is bottle type sampling, namely, a sampling bottle is connected to a sampling valve, and after medium is contained, the sampling bottle is removed for sealing. Because the sampling bottle has air, and the sampling bottle can be contacted with the air in the process of disassembling and assembling, the defects of the sampling process exist.

Accordingly, there is a need for an improvement over the prior art to address the deficiencies of the prior art.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a needle tube type quantitative sampling structure capable of effectively reducing the contact risk of a sampling medium and air and realizing quantitative sampling.

In order to achieve the technical purpose, the utility model adopts the following technical scheme: the utility model provides a needle tube formula ration sampling structure, includes sample needle tubing and tee bend subassembly, the tee bend subassembly includes the tee bend main part, the main channel of tee bend main part is connected with the pipeline of waiting to sample the medium, be provided with on the side channel of tee bend main part can by the sealed pad of self-healing that the needle tube pierces, the side channel tip of tee bend main part is provided with and is used for the extrusion the clamping ring of sealed pad of self-healing, be provided with the shutoff head in the clamping ring.

As an optimal technical scheme, the self-healing sealing gasket is a tetrafluoro silica gel composite gasket.

As the preferable technical scheme, the end part of the side channel of the tee body is provided with internal threads, the compression ring is provided with external threads, and the compression ring is in threaded connection with the side channel of the tee body.

As the preferable technical scheme, the compression ring is further provided with internal threads, the plugging head is provided with external threads, and the plugging head is in threaded connection with the compression ring.

As an optimal technical scheme, the outer ends of the plugging head and the compression ring are respectively provided with a stress part.

As the preferable technical scheme, the tee body, the compression ring and the plugging head are made of polytetrafluoroethylene materials.

By adopting the technical scheme, the utility model has at least the following beneficial effects:

(1) Before sampling, the needle tube is in a closed state, the needle head is thinner, the plugging head on the side channel of the three-way main body is taken down during sampling, and the needle head is directly inserted into a medium after penetrating through the self-healing sealing gasket, so that the risk of the medium contacting air is effectively reduced;

(2) In the sampling process, a sample is extracted through needle tube scales, so that the purpose of quantitative sampling can be realized;

(3) After the sampling is finished, the needle tube can be directly pulled out, and the sampling port is automatically closed, so that quick sealing is realized;

(4) The utility model has simple structure, lower cost and better sampling effect on the liquid medium which is easy to react with air.

Drawings

The following drawings are only for purposes of illustration and explanation of the present utility model and are not intended to limit the scope of the utility model. Wherein:

FIG. 1 is a schematic diagram of a front view of an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a tee assembly according to an embodiment of the present utility model;

FIG. 3 is a schematic side view of a tee assembly according to an embodiment of the present utility model;

FIG. 4 is a sampling state reference diagram of an embodiment of the present utility model.

Detailed Description

The utility model is further illustrated in the following, in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present utility model are described by way of illustration only. It is needless to say that the person skilled in the art realizes that the described embodiments may be modified in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive in scope.

As shown in fig. 1 to 4, the needle tube type quantitative sampling structure comprises a sampling needle tube 1 and a tee joint assembly 2, the tee joint assembly 2 comprises a tee joint main body 21, two ends of a main channel of the tee joint main body 21 are connected with a pipeline of a medium to be sampled, a self-healing sealing pad 22 which can be pierced by the sampling needle tube 1 is arranged on a side channel of the tee joint main body 21, a compression ring 23 for extruding the self-healing sealing pad 22 is arranged at the end part of the side channel of the tee joint main body 21, a blocking head 24 is arranged in the compression ring 23, and the end face of the blocking head 24 is attached to the central surface of the self-healing sealing pad 22.

Wherein, the self-healing sealing gasket 22 is a tetrafluoro silica gel composite gasket. The novel anti-theft protective cover belongs to a vulnerable part, but has lower cost, and needs to be replaced periodically when being used for about 10 times. The front end and the rear end of the main pipeline of the sampling structure are provided with the cut-off valve so as to facilitate the later replacement of the sealing gasket.

The tee body 21, the compression ring 23 and the blocking head 24 are made of Polytetrafluoroethylene (PTFE).

Referring to fig. 2, in this embodiment, an internal thread is provided at an end of a side channel of the tee body 21, an external thread is provided on the pressing ring 23, and the pressing ring 23 is in threaded connection with the side channel of the tee body 21. The pressure ring 23 is also provided with internal threads, the plugging head 24 is provided with external threads, and the plugging head 24 is in threaded connection with the pressure ring 23.

Referring to fig. 3, the outer ends of the plugging head 24 and the pressing ring 23 are preferably milled flat to form a stress portion that can be detached by using a wrench, so that the self-healing gasket 22 is convenient to detach and replace.

Referring to fig. 1 and 4, the plugging head 24 on the side channel of the three-way main body 21 is removed during sampling, the needle is directly inserted into the medium after penetrating the self-healing sealing gasket 22, then the scale on the needle cylinder is observed according to the sample demand for sampling, the needle cylinder is pulled out after sampling is completed, and the needle sheath is covered. At this time, the sampling port of the self-healing sealing gasket 22 is automatically closed, so that quick sealing is realized, and medium is prevented from overflowing. The whole sampling process is closed, the risk that the medium contacts with air is effectively reduced, and the sampling effect on the liquid medium which is easy to react with air is good.

The foregoing is illustrative of the present utility model and is not to be construed as limiting thereof. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this utility model, and are intended to be within the scope of this utility model.

Claims

1. Needle tube formula ration sampling structure, including sample needle tubing and tee bend subassembly, its characterized in that: the tee bend subassembly includes the tee bend main part, the main channel of tee bend main part is connected with the pipeline of waiting to take a sample the medium, be provided with on the side channel of tee bend main part can be by the self-healing sealing pad that the sample needle tubing impaled, the side channel tip of tee bend main part is provided with and is used for the extrusion the clamping ring of self-healing sealing pad, be provided with the shutoff head in the clamping ring.

2. The quantitative sampling structure of needle tubing as claimed in claim 1, wherein: the self-healing sealing pad is a tetrafluoro silica gel composite pad.

3. The quantitative sampling structure of needle tubing as claimed in claim 1, wherein: the side channel end of tee bend main part is provided with the internal thread, be provided with the external screw thread on the clamping ring, the clamping ring with the side channel threaded connection of tee bend main part.

4. A syringe type quantitative sampling structure as claimed in claim 3, wherein: the pressure ring is further provided with an internal thread, the plugging head is provided with an external thread, and the plugging head is in threaded connection with the pressure ring.

5. The quantitative sampling structure of needle tubing of claim 4, wherein: the outer ends of the blocking head and the pressing ring are respectively provided with a stress part.

6. A quantitative sampling structure according to any one of claims 1 to 5, wherein: the tee body, the compression ring and the plugging head are made of polytetrafluoroethylene materials.