Steam isokinetic sampling device

A sampling device and constant-velocity sampling technology, applied in the direction of sampling devices, sampling, measuring devices, etc., can solve the problems of increasing the area of ​​steam scouring, reducing welding strength, and affecting welding quality, so as to reduce the cross-sectional area and reduce the Fracture phenomenon, effect of improving welding quality

Pending Publication Date: 2018-03-23
SHANGHAI BOILER WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to manufacturing and installation errors, the steel plate 8 may deviate from the plane where the elbow is located, thereby increasing the area of ​​steam scouring, which in turn aggravates the risk of elbow fracture; due to the drastic changes in the parameters of the sample in the sampling system, in order to ensure the strength, the sampling bend The pipe 7 and the socket 9 are generally made of austenitic stainless steel or super alloy steel. When welding with the steam pipe 4, the weldi

Method used

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  • Steam isokinetic sampling device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] Such as figure 2 As shown, the steam isokinetic sampling device of this embodiment includes a transition pipe socket 2 fixedly connected to the outer wall of a steam pipe 4, a sampling device 1 is fixedly connected to the transition pipe socket 2, and the lower end of the sampling device 1 extends into the steam pipe 4. The sampling device The upper end of the sampling device 1 is provided with an opening, the lower end of the sampling device 1 is closed, and the side wall of the sampling device 1 located in the steam pipe 4 is provided with a hole facing the flow direction of the working fluid. The hole and the opening at the upper end of the sampling device 1 pass through the device The pipeline inside the sampling device 1 is connected. The hole facing the flow direction of the working fluid, the opening at the upper end of the sampling device 1 and the axis of the pipeline inside the sampling device 1 form an "L" shape to ensure that after the steam...

Example Embodiment

[0034] Example 2

[0035] Such as Figure 5 As shown, the steam isokinetic sampling device of this embodiment is similar to that of embodiment 1, except that the lower end of the sampling device 1 is cylindrical, and the hole facing the direction of the working fluid is cylindrical, and the sampling probe 3 is not provided. , The circumference of the hole facing the flow direction of the working fluid is slightly convex, and the outer edge of the circumference and the side wall of the sampling device 1 smoothly transition.

[0036] When in use, the steam in the steam pipe 4 is sampled through the hole facing the flow direction of the working fluid, and after passing through the sampling device 1, it enters the sampling system connected to the upper end of the sampling device 1.

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PUM

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Abstract

The invention provides a steam constant-kinetic sampling device, which is characterized in that it comprises a transition pipe seat fixedly connected with the outer wall of the steam pipe, the sampling device is fixedly connected with the transition pipe seat, the lower end of the sampling device is arranged in the steam pipe, and the upper end of the sampling device There is an opening, the lower end of the sampling device is closed, and the side wall of the sampling device located in the steam pipeline is provided with a hole facing the flow direction of the working fluid, and the hole and the opening at the upper end of the sampling device pass through the pipeline inside the sampling device connected. The present invention overcomes the deficiencies of the prior art, improves the rigidity of the sampling device by improving the structure of the sampling device, meets the technical requirements of constant velocity sampling, enhances the safety and accuracy of the sampling device during operation, and facilitates manufacturing and assembly. Convenient and widely applicable.

Description

technical field [0001] The invention relates to a steam isokinetic sampling device, which is used for strictly supervising and guaranteeing the steam quality. Background technique [0002] During the operation of the boiler, the steam-water medium is polluted and will carry a certain amount of impurities such as salt. When the steam contains excessive impurities, it will precipitate in the boiler and steam turbine, forming deposits such as salt scale. Excessive sediment will increase the resistance of the medium flow, affect the heat transfer efficiency of the boiler, and may cause safety accidents such as tube explosion. Therefore, in the operation of the boiler, the steam quality must be strictly supervised and guaranteed. Using a suitable sampling device, after real-time sampling and analysis, the steam-water medium can be adjusted in time according to the quality of the sample to ensure the normal operation of the boiler and steam turbine. [0003] Such as figure 1 S...

Claims

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Application Information

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IPC IPC(8): G01N1/22
CPCG01N1/2258
Inventor 安保睿洪梅周曙光叶伟民
Owner SHANGHAI BOILER WORKS
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