Organic solvent pipeline leak hunting device with conductivity

Abstract

The utility model relates to an organic solvent pipeline leakage detection device with conductivity, and relates to the technical field of pipeline leakage detection. The leakage detection device comprises a conductive layer arranged on an organic solvent pipeline to be detected; one end of the signal line is connected with the conductive layer; the control module is connected with the other end of the signal line, and the control module comprises a first voltage comparator used for converting the measured initial resistance of the conductive layer into an initial voltage signal; and the second voltage comparator is used for converting the measured real-time resistance of the conducting layer into a real-time voltage signal. According to the utility model, by utilizing the characteristic that some organic solvents are high in conductivity or contain conductive solutes, leakage is detected through the resistance change of the conductive layer, the sensitivity is high, and tiny leakage can be detected; during leakage, the resistance only changes locally, and a leakage point can be accurately positioned; the conductive layer is simple in structure, low in cost and convenient to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline leakage detection technical field, concretely relates to an organic solvent pipeline leak detection device with conductivity. BACKGROUND

[0002] In the industrial field of petrochemical industry, new energy and the like, it is often required to use pipelines to transport various organic solvents. Due to long-term use, corrosion and aging and the like, these pipelines are prone to leakage. The leaked organic solvents not only cause resource waste, but also easily cause fire and explosion and pollute the environment.

[0003] At present, commonly used pipeline leakage detection methods include pressure / flow monitoring method, acoustic wave detection method, optical fiber sensing method and the like. However, these methods have low sensitivity, are easily disturbed, are high in cost, and most of them cannot accurately locate the leakage point. Therefore, it is urgent to develop a new pipeline leakage detection technology which is high in sensitivity, can accurately locate, and is low in cost. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an organic solvent pipeline leak detection device with conductivity, which detects leakage through resistance change of the conductive layer by using the characteristics that some organic solvents have strong conductivity or contain conductive solutes, is high in sensitivity and can detect slight leakage, and can accurately locate the leakage point because the resistance changes only locally when leakage occurs. The conductive layer is simple in structure, low in cost and convenient to operate, is suitable for pipeline leakage monitoring in the fields of new energy manufacturing, chemical production and the like, and is particularly suitable for real-time monitoring of flammable and explosive organic solvent pipelines which are high in leakage sensitivity.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an organic solvent pipeline leak detection device with conductivity, which comprises:

[0006] A conductive layer is arranged on the organic solvent pipeline to be detected.

[0007] A signal line is connected to one end of the conductive layer.

[0008] A control module is connected to the other end of the signal line, and the control module comprises:

[0009] A first voltage comparator is used to convert the initial resistance of the conductive layer into an initial voltage signal.

[0010] A second voltage comparator is used to convert the real-time resistance of the conductive layer into a real-time voltage signal.

[0011] Optionally, the leak detection device further comprises:

[0012] A shell.

[0013] A mounting plate is arranged inside the shell, and the control module is arranged on the mounting plate.

[0014] Optionally, the control module further comprises a single-chip microcomputer, an output end of the first voltage comparator is connected with an input end of the single-chip microcomputer, and an output end of the second voltage comparator is connected with an input end of the single-chip microcomputer.

[0015] Optionally, the control module further comprises an alarm module, and the alarm module is connected with an output end of the single-chip microcomputer.

[0016] Optionally, the conductive layer comprises a metal wire mesh, and a mesh size of the metal wire mesh is 50-100 μm.

[0017] Optionally, the conductive layer comprises silver paste, carbon paste or nano-carbon tube paste.

[0018] Optionally, the shell comprises ABS plastic.

[0019] Optionally, the mounting plate comprises an epoxy plate material.

[0020] According to the technical scheme, the organic solvent pipeline leak detection device with the conductive performance is provided, the conductive layer is arranged on the pipeline of the organic solvent to be detected, one end of the signal line is connected with the conductive layer, the other end of the signal line is connected with the control module, the control module comprises the first voltage comparator and the second voltage comparator, the first voltage comparator is used for converting the initial resistance of the conductive layer into the initial voltage signal, and the second voltage comparator is used for converting the real-time resistance of the conductive layer into the real-time voltage signal. The leak detection device utilizes the characteristics that some organic solvents have strong conductivity or the organic solvents contain conductive solutes, detects the leakage through the resistance change of the conductive layer, has high sensitivity, can detect small leakage, the resistance changes only in a local part when the leakage occurs, and the leakage point can be accurately positioned; the conductive layer has simple structure, low cost and convenient operation, is suitable for pipeline leakage monitoring in new energy manufacturing, chemical production and other fields, and is particularly suitable for real-time monitoring of flammable and explosive organic solvent conveying pipelines with high leakage sensitivity. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of a leak detection device according to an embodiment of the utility model;

[0022] Figure 2 is a schematic view of a control module according to an embodiment of the utility model.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, shell 2, mounting plate

[0025] 3, conductive layer 4, signal line

[0026] 5. Control module 6. Pipeline of organic solvent to be tested

[0027] 51. First voltage comparator 52. Second voltage comparator

[0028] 53. Single-chip microcomputer 54. Alarm module DETAILED DESCRIPTION

[0029] The specific embodiments of the utility model embodiments will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the utility model embodiments, and are not used to limit the utility model embodiments.

[0030] In the utility model embodiments, the orientation words such as 'up, down, top, bottom' are generally used for the direction shown in the drawings or the position relationship description of the components in the vertical, perpendicular or gravity direction, unless otherwise stated.

[0031] In addition, if the description of 'first','second' and the like is involved in the utility model embodiments, the description of 'first','second' and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by 'first','second' can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0032] As shown is a leak detection device according to one embodiment of the utility model. As shown is a control module 5 according to one embodiment of the utility model. In the embodiment, the control module 5 is connected to the single-chip microcomputer 53 and the alarm module 54. Figure 1 As shown is a leak detection device according to one embodiment of the utility model. As shown is a control module 5 according to one embodiment of the utility model. In the embodiment, the control module 5 is connected to the single-chip microcomputer 53 and the alarm module 54. Figure 2 As shown is a leak detection device according to one embodiment of the utility model. As shown is a control module 5 according to one embodiment of the utility model. In the embodiment, the control module 5 is connected to the single-chip microcomputer 53 and the alarm module 54. Figure 1 As shown is a leak detection device according to one embodiment of the utility model. As shown is a control module 5 according to one embodiment of the utility model. In the embodiment, the control module 5 is connected to the single-chip microcomputer 53 and the alarm module 54. Figure 2In the method, the leak detection device comprises a conductive layer 3, a signal line 4 and a control module 5. The conductive layer 3 is arranged on the pipeline 6 of the organic solvent to be detected, one end of the signal line 4 is connected with the conductive layer 3, and the other end of the signal line 4 is connected with the control module 5. Specifically, the control module 5 comprises a first voltage comparator 51 and a second voltage comparator 52. The first voltage comparator 51 is used to convert the initial resistance of the conductive layer 3 into an initial voltage signal, and the second voltage comparator 52 is used to convert the real-time resistance of the conductive layer 3 into a real-time voltage signal. The conductive layer 3 and the control module 5 are connected through the signal line 4, and the change of the resistance of the conductive layer 3 is detected to detect whether the pipeline 6 of the organic solvent to be detected leaks. The conductive layer 3 has simple structure, low cost and convenient operation, and is suitable for large-scale and long-distance pipeline leak detection.

[0033] In the embodiment, considering the protection of the control module 5 to prevent the control module 5 from being damaged, the leak detection device further comprises a shell 1, and a mounting plate 2 is further arranged in the shell 1, and the control module 5 is mounted on the mounting plate 2.

[0034] In the embodiment, in order to obtain the output signals of the first voltage comparator 51 and the second voltage comparator 52, the control module 5 further comprises a single-chip microcomputer 53. The output end of the first voltage comparator 51 is connected with the input end of the single-chip microcomputer 53, and the output end of the second voltage comparator 52 is connected with the input end of the single-chip microcomputer 53. After the voltage signal of the conductive layer 3 is obtained by the first voltage comparator 51, the voltage signal is output to the single-chip microcomputer 53 through the output end, and the voltage signal of the first voltage comparator 51 is stored by the single-chip microcomputer 53. After the voltage signal of the second voltage comparator 52 is output to the single-chip microcomputer 53, the signals of the first voltage comparator 51 and the second voltage comparator 52 are compared to determine whether the pipeline 6 of the organic solvent to be detected leaks.

[0035] In the embodiment, the control module 5 further comprises an alarm module 54, and the alarm module 54 is connected with the output end of the single-chip microcomputer 53. When it is determined that the pipeline 6 of the organic solvent to be detected leaks, the alarm module 54 will alarm and the LED light will be turned on to alarm.

[0036] In this embodiment, considering the materials of the different organic solvent pipelines 6 to be measured, the arrangement of the conductive layer 3 material can be in various forms known to those skilled in the art. In view of the diameter of the organic solvent in the organic solvent pipeline 6 to be measured, in a preferred example of the utility model, the conductive layer 3 can be a metal wire mesh, the mesh size of which is 50-100 μm, smaller than the diameter of the organic solvent, so as to reduce leakage when the organic solvent pipeline 6 to be measured leaks. When laying the conductive layer 3, the metal wire mesh can be cut into a size equal to the length of the pipeline area to be measured and wide enough to completely wrap the pipeline. The cut wire mesh is wound on the outer wall of the pipeline from one end, and the wire mesh is pulled tight during winding to ensure that it closely adheres to the pipeline and cannot have wrinkles or hollows. For areas where the wire mesh is difficult to wind, such as valves, elbows, etc., in a preferred example of the utility model, the conductive layer 3 can be silver paste, carbon paste or nano-carbon tube paste, which is coated on the organic solvent pipeline 6 to be measured to form the conductive layer 3. For metal pipelines, the ends of the pipeline in the leakage measuring area are insulated to avoid forming a loop with the ground or other facilities to shunt the detection current. The signal line 4 can be directly welded on the pipeline or connected by using a special fixture. At the same time, the insulation and corrosion protection of the signal line 4 are well done.

[0037] In this embodiment, in order to effectively protect the control module 5, in a preferred example of the utility model, the shell 1 can use ABS plastic, and the protection level is IP65, and the mounting plate 2 is an epoxy plate material, so as to prevent the control module 5 from being damaged and unable to measure.

[0038] In the working process of the leakage measuring device, after the initial resistance R0 of the conductive layer 3 is measured, the first voltage comparator 51 converts the obtained resistance signal into a first voltage signal V0 and outputs it to the single-chip microcomputer 53, which stores the first voltage signal V0. After the organic solvent pipeline 6 to be measured is put into use, the real-time resistance R x of the conductive layer 3 is obtained, which is converted into a second voltage signal V x by the second voltage comparator 52 and output to the single-chip microcomputer 53. The single-chip microcomputer 53 compares the first voltage signal V0 and the second voltage signal V x , and if V x <V0, leakage occurs, and the alarm module 54 issues an alarm, and the single-chip microcomputer 53 calculates the leakage position L by formula (1),

[0039]

[0040] wherein R e is the resistance when the conductive layer 3 is completely immersed, and L0 is the length of the pipeline, and the calculation result is displayed through the LCD of the alarm module 54. If V x ≥V0, the real-time resistance of the organic solvent pipeline 6 to be measured is continuously obtained.

[0041] By the above technical scheme, the utility model provides a kind of organic solvent pipeline leak hunting device with conductivity, by being arranged in the electrically conductive layer 3 on the organic solvent pipeline 6 to be measured, signal line 4 one end is connected with electrically conductive layer 3, control module 5 is connected with the other end of signal line 4, control module 5 includes first voltage comparator 51 and second voltage comparator 52, first voltage comparator 51 is used to convert the initial resistance of measured electrically conductive layer 3 into initial voltage signal, and second voltage comparator 52 is used to convert the real-time resistance of measured electrically conductive layer 3 into real-time voltage signal.The leak hunting device utilizes the characteristics that certain organic solvent has strong conductivity or organic solvent contains conductive solute, detects leakage by the resistance change of electrically conductive layer 3, and the sensitivity is high, and small leakage can be detected;Resistance only changes in local when leaking, and the leakage point can be accurately positioned;Electrically conductive layer 3 is simple in structure, low in cost, convenient to operate, is suitable for pipeline leakage monitoring in new energy manufacturing, chemical production and other fields, and is especially suitable for the real-time monitoring of flammable and explosive organic solvent conveying pipeline with high sensitivity requirement to leakage.

[0042] The preferred embodiments of the utility model are described in detail above in combination with drawings, but the utility model is not limited to this.In the technical concept range of the utility model, the technical scheme of the utility model can be subjected to various simple modifications.The various specific technical features are combined in any suitable mode, and in order to avoid unnecessary repetition, the utility model does not further describe various possible combination modes.But these simple modifications and combinations should also be regarded as the disclosed content of the utility model, and all belong to the protection range of the utility model.

Claims

1. An organic solvent pipeline leak detection device having electrically conductive properties, characterized by, The leakage testing device comprises: a conductive layer arranged on a pipeline of an organic solvent to be tested; a signal line, one end of which is connected with the conductive layer; a control module, the other end of the signal line being connected with the control module, the control module comprising: a first voltage comparator for converting the initial resistance of the conductive layer into an initial voltage signal; a second voltage comparator for converting the real-time resistance of the conductive layer into a real-time voltage signal.

2. The leak testing apparatus of claim 1, wherein The leakage testing device further comprises: a housing; a mounting plate arranged inside the housing, the control module being arranged on the mounting plate.

3. The leak testing apparatus of claim 1, wherein The control module further comprises a single-chip microcomputer, the output end of the first voltage comparator being connected with the input end of the single-chip microcomputer, and the output end of the second voltage comparator being connected with the input end of the single-chip microcomputer.

4. The leak testing apparatus of claim 3, wherein The control module further comprises an alarm module, the output end of the single-chip microcomputer being connected with the alarm module.

5. The leak testing apparatus of claim 1, wherein The conductive layer comprises a metal wire mesh, the mesh size of the metal wire mesh being 50-100 μm.

6. The leak testing apparatus of claim 1, wherein The conductive layer comprises silver paste, carbon paste or nano-carbon tube paste.

7. The leak testing apparatus of claim 2, wherein The housing comprises ABS plastic.

8. The leak testing apparatus of claim 2, wherein The mounting plate comprises an epoxy plate material.

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