CN211904798U

CN211904798U - Closed sampler

Info

Publication number: CN211904798U
Application number: CN202020398518.6U
Authority: CN
Inventors: 李海良; 杨东明; 李捷; 王喜兵
Original assignee: China Petroleum and Chemical Corp
Current assignee: China Petroleum and Chemical Corp
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-11-10
Anticipated expiration: 2030-03-25

Abstract

The utility model discloses an airtight sampler, which comprises a sampling pipe and a cock, wherein the sampling pipe comprises a straight pipe body with internal threads, one end of the pipe body is provided with a sealing ring, the other end is provided with a sealing plate, and the lower side of the pipe body is provided with a sampling port; the cock is arranged in the tube body and is provided with an external thread meshed with the internal thread, a closed part is formed at one end of the cock body, a handle is arranged at the other end of the cock body, and the cock can be rotated in the tube body by rotating the handle and can be made to reciprocate along the axial direction of the tube body; the closure portion of the plug body can sealingly abut against the sealing ring when the tap is moved towards the sampling end, the closure portion of the tap being located on the side of the sampling opening facing the operating end when the tap is moved towards the operating end. This application can avoid in the residual liquid enters into the sample, improves the accuracy of sampling.

Description

Closed sampler

Technical Field

The utility model relates to an airtight sample thief, it is used for sampling to the liquid in the petrochemical pipeline.

Background

The sampler is widely applied to the field of petrochemical industry, and is used for collecting samples on line for quality or component analysis so as to guide production regulation or product regulation, so that the accuracy of the samples is ensured. The existing sampler is generally that a sampling tube is directly installed on a pipeline, partial solution can be retained in the sampling tube after sampling, residual liquid in the sampling tube needs to be discharged firstly when sampling next time, then a fresh sample is collected, not only is the operation troublesome, but also the time for discharging the residual liquid is not easy to master, and the detection accuracy is influenced by mixing partial residual liquid into the sample sometimes.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a sampler to in avoiding the survivor liquid to enter into the sample, improve the accuracy of sampling, concrete technical scheme is:

a closed sampler is used for sampling from a fluid pipeline and comprises a sampling pipe and a cock, wherein the sampling pipe comprises a straight pipe body, internal threads are formed in the pipe body, two opposite ends of the pipe body are respectively formed into a sampling end and an operating end, the sampling end penetrates through the pipe wall of the fluid pipeline and then extends into an inner cavity of the fluid pipeline, a sealing ring is arranged at the sampling end of the pipe body, a sealing plate is arranged at the operating end of the pipe body, a sampling port is arranged at the lower side of the pipe body, and a sample collecting pipe is arranged on the sampling port; the cock is arranged in the tube body and comprises a cock body, wherein an external thread meshed with the internal thread of the tube body is formed on the cock body, a closed part is formed at one end of the cock body facing to the sampling end, an operating rod is arranged at the other end of the cock body, the operating rod penetrates through the sealing plate outwards in a sealing mode and is connected with a handle, and the handle can be rotated to rotate the cock in the tube body and enable the cock to move in a reciprocating mode along the axial direction of the tube body;

when the cock moves towards the sampling end, the closing part of the cock body can be in sealing contact with the sealing ring, and when the cock moves towards the operating end, the closing part of the cock is positioned on one side of the sampling opening, which faces the operating end, so that the sampling opening is communicated with the fluid pipeline.

When the sampler is in a non-working state, the closing part is tightly abutted against the sealing ring, so that liquid in the fluid pipeline is prevented from entering the closed sampler. When sampling is needed, the handle is rotated to enable the cock to rotate and move towards the operating end of the pipe body until the cock is positioned on one side of the sampling port, which faces the operating end, the sampling port is opened, liquid in the fluid pipeline enters the pipe body through the central hole of the sealing ring, then flows out through the sampling port and the sample collecting pipe, and sampling is conducted. In order to ensure the accuracy of sampling, the liquid which flows out first needs to be treated as waste liquid and not used as a sample.

After the sampling is finished, the handle is rotated, the cock is rotated reversely, the cock moves towards the direction of the sampling end of the pipe body until the closed part is abutted against the sealing ring in a sealing mode, and the sampling end is closed.

This application has set up and has leaned on closure portion and sealing ring that is in the same place in sealed seal, and when non-operating condition, the closure portion seals the sample end of body, avoids the liquid in the fluid pipeline to enter into the body, and after the adoption was accomplished, utilizes the cock to push into the fluid pipeline with the liquid that enters into in the body, reduces the volume of depositing of liquid in the body by a wide margin. After the application is adopted, the residual liquid can be effectively prevented from entering the sample, and the sampling accuracy is improved.

In order to avoid scalding operators when sampling hotter liquid, a cooling jacket is arranged on the outer wall of the pipe body.

Specifically, the section of the ring body of the sealing ring is rectangular, the closing part is a truncated cone, the small end of the truncated cone faces the sealing ring, and the sealing ring and the truncated cone are coaxially arranged. Preferably, the generatrix of the truncated cone forms an angle of 25-35 ° with the axis. When the closing part is pressed on the sealing ring, the conical surface of the truncated cone is pressed on the sharp corner of the ring body of the sealing ring, which faces the inner cavity of the tube body, and a linear seal is formed, so that liquid in the fluid pipeline is prevented from entering the sampling tube.

Further, in order to ensure the sampling accuracy, the length of the sampling pipe extending into the fluid pipeline is 30-50% of the diameter of the fluid pipeline. The tube is too long to extend into the fluid pipeline, so that the normal flow of liquid in the fluid pipeline is influenced, and a representative sample cannot be collected if the tube is too short.

Specifically, the tube body is horizontally disposed. The design can ensure that the liquid in the fluid pipeline can smoothly enter the closed sampling device.

Preferably, to reduce the size of the device, the length of the tap is equal to the distance from the side of the sampling opening facing the operating end to the sealing plate.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention, specifically, a state diagram during shutdown.

Fig. 2 is a state diagram of the embodiment of fig. 1 in operation.

Fig. 3 is an enlarged view of a portion a in fig. 1.

Fig. 4 is an exploded view of fig. 3.

Detailed Description

Referring to fig. 1-4, a closed sampler for sampling a fluid in a fluid pipeline 100 includes a sampling tube 20 and a cock 30, wherein the sampling tube 20 includes a tube body 21 in a straight tube shape, an internal thread is formed in the tube body 21, two opposite ends of the tube body 21 are respectively formed as a sampling end 211 and an operating end 212, and the sampling end 211 penetrates through the wall of the fluid pipeline 100 and then extends into the inner cavity of the fluid pipeline. The pipe body 21 is horizontally disposed.

The length of the sampling tube extending into the fluid conduit 100 is 40% of the diameter of the fluid conduit, it being understood that in other embodiments the length of the sampling tube extending into the fluid conduit 100 may also be 30%, 35%, 45% or 50% of the diameter of the fluid conduit.

A sealing ring 22 is provided at the sampling end 211 of the body and a flange 27 is mounted at the operative end of the body and a sealing plate 28 is bolted sealingly mounted on the flange 27. A sampling port 23 is provided at the lower side of the tube body 21, and a sample collection tube 25 is mounted on the sampling port 23, and a sampling valve 26 is provided on the sample collection tube. In this embodiment, the sampling valve is a needle valve.

The cock 30 is installed in the tubular body 21, the cock 30 includes a cock body 31, an external thread engaged with the internal thread of the tubular body is formed on the cock body 31, a closing part 32 is formed on one end of the cock body facing the sampling end 211, an operation rod 33 is installed on the other end of the cock body 31, a handle 331 is connected to the operation rod 33 after passing through the sealing plate in an outward sealing manner, and a packing is provided between the operation rod 33 and the sealing plate 28 to prevent a small amount of liquid remaining in the tubular body 21 from leaking out.

The handle 331 is rotated to rotate the cock in the tube and to reciprocate the cock in the axial direction of the tube. The closure portion of the plug body can sealingly abut against the sealing ring when the tap is moved towards the sampling end, the closure portion of the tap being located on the side of the sampling opening facing the operating end when the tap is moved towards the operating end.

Referring to fig. 3 and 4, in the present embodiment, the section of the ring body 221 of the sealing ring 22 is rectangular, the closing portion 32 is a truncated cone, the small end of the truncated cone faces the sealing ring 22, and the sealing ring is disposed coaxially with the truncated cone. When the closing part presses against the sealing ring, the conical surface 321 of the truncated cone presses against the sharp corner 222 of the ring body of the sealing ring facing the inner cavity of the tube body, and a line seal is formed.

In this embodiment, the included angle α between the generatrix of the truncated cone and the axis is 30 °. It will be appreciated that in other embodiments the angle α between the generatrix of the truncated cone and the axis may also be 25 ° or 35 °.

A cooling jacket 40 is installed on the outer wall of the pipe body, the cooling jacket 40 includes a sleeve 41 wrapped on the outer wall of the pipe body, a refrigerant inlet pipe 46 is installed on the lower side of the sleeve 41, and a refrigerant outlet pipe 47 is installed on the upper side of the jacket 41.

In this embodiment, referring to fig. 2, the length L2 of the cock is equal to the distance L1 from the side of the sampling port facing the operation end to the sealing plate, so that when the cock is screwed toward the operation end, the sampling port can be completely opened when the cock abuts against the sealing plate, thereby reducing the unnecessary length of the sampling tube and reducing the volume of the device. In fig. 2, the tap has a small gap with the seal plate for clarity.

When the embodiment is in a non-working state, the closing part is tightly abutted against the sealing ring, so that liquid in the fluid pipeline is prevented from entering the closed sampler. When sampling is required, the handle 331 is rotated to rotate the cock and move the cock toward the operating end of the tube 21 until the sampling port is located at the side of the sampling port facing the operating end, the sampling port is opened, and the liquid in the fluid pipeline 100 enters the tube through the central hole of the sealing ring and then flows out through the sampling port 23 and the sample collection tube 25 to be collected by the sample cup 110. In order to ensure the accuracy of sampling, the liquid which flows out first needs to be treated as waste liquid and not used as a sample.

After the sampling is completed, the handle is turned to rotate the cock in the opposite direction, and the cock is moved toward the sampling end of the tube body 21 until the closing portion is sealingly abutted against the sealing ring to close the sampling end.

Claims

1. A closed sampler is used for sampling from a fluid pipeline and is characterized by comprising a sampling pipe and a cock, wherein the sampling pipe comprises a straight pipe body, internal threads are formed in the pipe body, the two opposite ends of the pipe body are respectively formed into a sampling end and an operating end, the sampling end penetrates through the pipe wall of the fluid pipeline and then extends into the inner cavity of the fluid pipeline, a sealing ring is arranged at the sampling end of the pipe body, a sealing plate is arranged at the operating end of the pipe body, a sampling port is arranged at the lower side of the pipe body, and a sample collecting pipe is arranged on the sampling port; the cock is arranged in the tube body and comprises a cock body, wherein an external thread meshed with the internal thread of the tube body is formed on the cock body, a closed part is formed at one end of the cock body facing to the sampling end, an operating rod is arranged at the other end of the cock body, the operating rod penetrates through the sealing plate outwards in a sealing mode and is connected with a handle, and the handle can be rotated to rotate the cock in the tube body and enable the cock to move in a reciprocating mode along the axial direction of the tube body;

2. The hermetic sampler of claim 1, wherein a cooling jacket is installed on an outer wall of the tube body.

3. The hermetic sampler of claim 1, wherein the ring body of the sealing ring has a rectangular cross section, the closing portion is a truncated cone, the small end of the truncated cone faces the sealing ring, and the sealing ring is coaxially arranged with the truncated cone.

4. The hermetic sampler of claim 3 wherein the generatrix of the truncated cone is at an angle of 25-35 ° to the axis.

5. The confined sampler of claim 1 wherein the sampling tube extends into the fluid conduit a length of 30 to 50% of the diameter of the fluid conduit.

6. The hermetic sampler of claim 1 wherein the tube is horizontally disposed.

7. The confined sampler of claim 1 wherein the length of the tap is equal to the distance from the side of the sampling port facing the handle end to the seal plate.