Mechanical sealing leakage detection system and method

A leak detection and mechanical seal technology, which is applied in the direction of liquid tightness measurement using liquid/vacuum degree, and by measuring the increase and deceleration rate of the fluid, etc., can solve the problem of online quantitative detection of leakage, difficult mechanical seal, and incapable of real-time and accurate detection of machinery. Seal leakage and other issues to achieve the effect of fast detection speed and high accuracy of results

Inactive Publication Date: 2015-02-18
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above two methods can only qualitatively judge the leakage of mechanical seals, and it is difficult to realize online quantitative detection of mechanical seal leakage, let alone real-time and accurate detection of mechanical seal leakage

Method used

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  • Mechanical sealing leakage detection system and method
  • Mechanical sealing leakage detection system and method

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Experimental program
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Embodiment 1

[0033] This embodiment provides a mechanical seal leakage detection system, which is applied to long-distance pipeline oil pumps, such as figure 1 As shown, the system includes: a droplet detection unit 11, a data processing unit 12; wherein,

[0034] The droplet detection unit 11 is configured to collect a first flow signal of the leaked liquid amount according to an optical detection method when it is detected that the leaked liquid amount meets the droplet counting condition;

[0035] The data processing unit 12 is configured to acquire the first flow signal collected by the liquid drop detection unit 11, and determine the first flow of the leakage liquid according to the first flow signal.

[0036] Here, the system further includes: a solenoid valve 13, and after determining the second flow rate of the leakage liquid according to the first flow signal, the data processing unit 12 is used to: control the solenoid valve 13 to be in a closed state In order to avoid more oil ...

Embodiment 2

[0057] Compared with Embodiment 1, this embodiment also provides a mechanical seal leakage detection method, such as image 3 As shown, the method mainly includes the following steps:

[0058] Step 110, collecting the amount of leaked liquid;

[0059] In this step, when the amount of liquid leaked by the mechanical seal is small, that is, when the amount of leaked liquid exists in the form of droplets, the droplet detection unit collects the droplets through the droplet collection funnel; when the amount of liquid leaked by the mechanical seal is large , that is, when the amount of leaked liquid exists in the form of a liquid flow, the differential pressure detection unit collects the liquid flow through the liquid collection unit.

[0060] Step 111, judging whether the amount of leaked liquid meets the drop counting condition, if yes, execute step 112; if not, execute step 113;

[0061] In this step, it is judged by the droplet detection unit whether the amount of leaked li...

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Abstract

The invention discloses a mechanical sealing leakage detection system and method applied to long pipeline delivery oil pumps. The method includes acquiring leakage liquid quantity, when the detected the leaked liquid quantity meets the drop counting condition, acquiring a first flow signal of the leaked liquid quantity by the optical detection method; determining a first flow of the leaked liquid quantity according to the first flow signal; when the leaked liquid quantity cannot meet the drop counting condition, acquiring a second flow signal of the leaked liquid quantity by the optical detection method; determining a second flow of the leaked liquid quantity according to the second flow signal. Thus, mechanical sealing leakage can be detected online quantitatively, and the mechanical sealing leakage quantity can be detected accurately in real time.

Description

technical field [0001] The invention belongs to the technical field of fault state diagnosis of petroleum equipment, and in particular relates to a mechanical seal leakage detection system and method. Background technique [0002] The oil pump of the long-distance pipeline is the key equipment of the oil pipeline, and the failure of the mechanical seal is the main reason for the shutdown of the oil pump for maintenance. Therefore, it is of great practical significance to improve the leakage detection level of mechanical seals used in oil pumps, to carry out condition maintenance of mechanical seals, to improve the integrity rate of oil pumps, to improve the management level of pipeline transportation, and to reduce economic losses. [0003] However, the current detection methods for mechanical seal leakage of pipeline oil pumps mainly include two methods: the first method is visual inspection method; the second method is liquid level switch detection method. The first metho...

Claims

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Application Information

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IPC IPC(8): G01M3/26
Inventor 李柏松谭东杰杨晓峥董学刚杨喜良林嵩张兴张丽稳任小龙
Owner PETROCHINA CO LTD
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