CN106872218B

CN106872218B - Direction adjustable mobile steam sampling structure

Info

Publication number: CN106872218B
Application number: CN201510915907.5A
Authority: CN
Inventors: 李序东; 刘妍; 何虹
Original assignee: Research Institute of Nuclear Power Operation; China Nuclear Power Operation Technology Corp Ltd
Current assignee: Research Institute of Nuclear Power Operation; China Nuclear Power Operation Technology Corp Ltd
Priority date: 2015-12-10
Filing date: 2015-12-10
Publication date: 2023-10-20
Anticipated expiration: 2035-12-10
Also published as: CN106872218A

Abstract

The invention belongs to the field of thermal measurement, and particularly discloses a flow steam sampling structure with an adjustable direction, which comprises a sampling head, a steam eduction tube, a flexible elbow, a traction rod, a piston and a cylinder body, wherein the sampling head is arranged on the sampling head; the upper end of the sampling head is fixedly connected with one end of the flexible elbow, the other end of the flexible elbow is fixedly connected with a steam eduction tube, and the steam eduction tube penetrates through the pipeline and extends out of the pipe wall; the cylinder body is fixedly arranged outside the pipeline, the piston is hermetically arranged in the cylinder body, the lower end of the piston is hinged with the upper end of the traction rod, and the lower end of the traction rod is fixedly connected with the sampling head. Utilize adjusting screw to promote the piston and remove in the cylinder body, drive the traction lever and can swing around its junction with the piston, the traction lever promotes the sampling head swing, consequently need not to be equipped with electric device, realized the regulation of sampling head direction promptly, adjust sampling head direction and make its accurate and the flow direction of steam unanimous, sampling error reduces, has solved the big problem of error when traditional steam sampling.

Description

Direction adjustable mobile steam sampling structure

Technical Field

The invention belongs to the field of thermal measurement, and particularly discloses a flow steam sampling structure with an adjustable direction.

Background

In order to study or measure the chemical composition or humidity of the steam flowing in the thermodynamic pipeline or container, a set of sampling devices arranged along the axial direction of the pipeline is generally required to lead the steam out of the system, but the flow direction of the steam in the pipeline or container is not necessarily perpendicular to the section of the equipment, that is, the direction of a sampling tube cannot be exactly consistent with the flow direction of the steam, and part of the steam and water are lost in the sampling process, so that the accuracy of sampling cannot be ensured.

The traditional sampling device cannot be adjusted once the direction of the sampling port is installed, so that the traditional sampling device cannot be accurately consistent with the flow direction of steam, and the actual measurement result of the humidity or the components of the steam is in error with the actual measurement result. It is important to design a set of sampling devices with adjustable directions to accurately study or measure the humidity or composition of the flowing steam.

Disclosure of Invention

The invention aims to provide a flowing steam sampling structure with an adjustable direction and an adjustable direction of a sampling port, which can accurately sample from the flowing direction of steam.

The technical scheme of the invention is as follows:

the flow steam sampling structure with adjustable direction comprises a sampling head positioned in a pipeline, a steam eduction tube fixed on the wall of the pipeline, a flexible elbow, a traction rod, a piston and a cylinder body; the upper end of the sampling head is fixedly connected with one end of the flexible elbow, the other end of the flexible elbow is fixedly connected with a steam eduction tube, and the steam eduction tube penetrates through the pipeline and extends out of the pipe wall; the cylinder body is fixedly arranged outside the pipeline, the piston is hermetically arranged in the cylinder body, the lower end of the piston is hinged with the upper end of the traction rod, and the lower end of the traction rod is fixedly connected with the sampling head.

In one of the above-described flow steam sampling structures with adjustable direction: the piston is connected with an adjusting screw which is in threaded connection with the cylinder body.

In one of the above-described flow steam sampling structures with adjustable direction: the piston comprises a cylindrical body and a piston ring, the piston ring is sleeved outside the cylindrical body, and the piston ring is in sealing contact with the inner wall of the cylinder body.

In one of the above-described flow steam sampling structures with adjustable direction: the long rod is a rigid thin rod with the diameter of 2-4 mm and is made of austenitic stainless steel or aluminum alloy high-temperature resistant materials.

In one of the above-described flow steam sampling structures with adjustable direction: the austenitic stainless steel is 304 austenitic stainless steel or 316 austenitic stainless steel.

In one of the above-described flow steam sampling structures with adjustable direction: the aluminum alloy high temperature resistant material is 2A70 or 2A80.

In one of the above-described flow steam sampling structures with adjustable direction: the sampling head is a stainless steel pipe with the lower end processed into a cone shape.

In one of the above-described flow steam sampling structures with adjustable direction: the cylinder body material is aluminum alloy.

The invention has the remarkable effects that: utilize adjusting screw to promote the piston and remove in the cylinder body, drive the traction lever and can swing around its junction with the piston, the traction lever promotes the sampling head swing, consequently need not to be equipped with electric device, realized the regulation of sampling head direction promptly, adjust sampling head direction and make its accurate and the flow direction of steam unanimous, sampling error reduces, has solved the big problem of error when traditional steam sampling.

2) The selected materials are austenitic stainless steel (such as 304 austenitic stainless steel and 316 austenitic stainless steel) and aluminum alloy high temperature resistant materials (2A 70 or 2A 80) and have higher strength, so the device can resist high temperature of 200-400 ℃ and pressure of not lower than 10 MPa.

The piston is safe and reliable, and when the piston and the cylinder body move relatively, the piston ring designed on the piston can ensure good sealing effect of the piston and the cylinder body; meanwhile, the fine pressure threads on the adjusting screw have good load resistance, and the risk is small when the device is operated.

Drawings

FIG. 1 is a schematic diagram of a flow steam sampling structure with adjustable direction;

in the figure: 1. an adjusting screw; 2. a cylinder; 3. a piston; 4. a pipe; 5. a traction rod; 6. a flexible elbow; 7. a steam eduction tube; 8. a sampling head.

Detailed Description

The invention will be described in further detail with reference to the accompanying drawings and specific examples.

As shown in fig. 1, the flexible elbow 6 is a section of arc-shaped stainless steel corrugated pipe, and has ductility and flexibility. The flexible elbow 6 is positioned in the pipeline 4, and the two ends of the flexible elbow 6 are respectively provided with a sampling head 8 and a steam eduction tube 7. One end of the flexible elbow 6 is fixed at the upper end of the steam eduction tube 7 in a welding mode, and the other end is welded at the upper end of the sampling head 8. The steam eduction tube 7 passes through the pipeline 4 and is fixed on the pipe wall, and in order to make steam fully enter from the pipe orifice, the pipe orifice of the steam eduction tube 7 is flushed down.

In order to accurately adjust the sampling head 8, the sampling head 8 can be accurately consistent with the steam flowing direction, and a traction rod 5 is fixedly arranged on the sampling head 8. The upper end of the traction rod 5 is provided with a piston 3 and a cylinder body 2. The cylinder 2 is arranged on the outer wall of the pipeline 3, the piston 3 is arranged in the cylinder body 2 in a sealing way, the lower end of the piston 3 is hinged with one end of the traction rod 5, and the other end of the traction rod 5 is fixedly connected with the sampling head 8. The pushing of the piston 3 is achieved by means of the adjusting screw 1.

The cylinder body 2 is a cylinder with a smooth inner wall, the material can be aluminum alloy, and the rear end of the cylinder body 2 is in contact with the adjusting screw 1 to process internal threads.

The piston 3 consists of a cylindrical body and a piston ring, the piston ring 302 is sleeved outside the cylindrical body, and the piston ring 302 can ensure that the piston 3 and the cylinder body 2 still have good sealing performance when relatively moving, so that steam is not leaked.

The traction rod 5 is a rigid thin rod with the diameter of 2-4 mm, and the end part of the traction rod 5 is hinged with the lower end of the piston 3 so as to ensure that the traction rod 5 can swing around the joint of the traction rod 5 and the piston 3.

The traction rod 5 is made of austenitic stainless steel (such as 304 austenitic stainless steel and 316 austenitic stainless steel) or aluminum alloy high-temperature resistant materials (2A 70 or 2A 80), so that rigidity and strength can be ensured to be enough to drive or push the sampling head 8 to swing without deformation.

The steam eduction tube 7 is a stainless steel tube, is communicated with the flexible elbow 6 and is welded and fixed.

The sampling head 8 is a stainless steel pipe with a conical lower end.

When the sampling device is used, the adjusting screw 1 is rotated, the piston 3 is pulled or pushed to do linear displacement in the cylinder body 2, the linear motion of the piston 3 drives the traction rod 5, and the traction rod 5 pulls or pushes the sampling head 8 to swing.

When the sampling head 8 swings, the section of the lower end part of the sampling head 8 can face the direction required by the test in the pipeline 4 due to the action of the flexible elbow 6, and the judgment of the direction of the sampling head 8 can be carried out by adopting the following method: four pressure taking openings uniformly distributed along the circumferential direction of the pipeline 4 are processed outside the pipeline 4, the positions of the pressure taking openings are the same as the lower end of the sampling head 8, and the pressure difference among the 4 pressure taking openings is read to judge.

The adjusting screw 1 may be a hexagon head or a square head bolt, and a fine thread is adopted, and the stroke of the thread should be long enough to ensure that the linkage component can generate larger linear displacement.

Claims

1. The utility model provides a direction adjustable mobile steam sampling structure, includes sample head (8) and steam eduction tube (7) of fixing on pipeline (4) pipe wall that are located pipeline (4) inside, its characterized in that: the device also comprises a flexible elbow (6), a traction rod (5), a piston (3) and a cylinder body (2); the upper end of the sampling head (8) is fixedly connected with one end of the flexible elbow (6), the other end of the flexible elbow (6) is fixedly connected with the steam eduction tube (7), and the steam eduction tube (7) passes through the pipeline (4) to extend out of the pipe wall; the cylinder body (2) is fixedly arranged outside the pipeline (4), the piston (3) is hermetically arranged in the cylinder body (2), the lower end of the piston (3) is hinged with the upper end of the traction rod (5), and the lower end of the traction rod (5) is fixedly connected with the sampling head (8); the piston (3) is connected with an adjusting screw (1), and the adjusting screw (1) is in threaded connection with the cylinder body (2); the piston (3) comprises a cylindrical body and a piston ring, the piston ring is sleeved outside the cylindrical body, and the piston ring is in sealing contact with the inner wall of the cylinder body (2).

2. A directionally adjustable flow steam sampling structure in accordance with claim 1, wherein: the traction rod (5) is a rigid thin rod with the diameter of 2-4 mm and is made of austenitic stainless steel or aluminum alloy high-temperature resistant materials.

3. A directionally adjustable flow steam sampling structure in accordance with claim 2, wherein: the austenitic stainless steel is 304 austenitic stainless steel or 316 austenitic stainless steel.

4. A directionally adjustable flow steam sampling structure in accordance with claim 2, wherein: the aluminum alloy high temperature resistant material is 2A70 or 2A80.

5. A directionally adjustable flow steam sampling structure in accordance with claim 1, wherein: the sampling head (8) is a stainless steel pipe with the lower end processed into a cone shape.

6. A directionally adjustable flow steam sampling structure in accordance with claim 1, wherein: the cylinder body (2) is made of aluminum alloy.