CN218917364U - Online sample pipeline self-cleaning system - Google Patents
Online sample pipeline self-cleaning system Download PDFInfo
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- CN218917364U CN218917364U CN202222466240.3U CN202222466240U CN218917364U CN 218917364 U CN218917364 U CN 218917364U CN 202222466240 U CN202222466240 U CN 202222466240U CN 218917364 U CN218917364 U CN 218917364U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The utility model discloses an automatic cleaning system for an online sample pipeline. The system comprises cut-off ball valves A-1, A-2 and A-3, three-way ball valves B-1, B-2, B-3 and B-4, pneumatic valves (normally open) C-1, C-2, C-3 and C-4, pneumatic valves (normally closed) D-1, one-way valves E-1 and E-2, a filter F, flow meters G-1 and G-2, electromagnetic valves S-1, S-2, S-3 and S-4 and a programmable controller PLC. According to the on-line sample pipeline automatic cleaning system, the flowmeter is adjusted by the needle valve and has low flow alarm output, and the flowmeter is interlocked with the PLC, so that the automatic cleaning of the system is realized; in addition, the electromagnetic valve of the control loop is connected in parallel with a manual three-way ball valve simultaneously, so that the system has the function of manually cleaning a pipeline, and the electromagnetic valve drives the pneumatic valve through an air source, so that the circuit of the control loop and the waterway of the sample loop are separated, and the safe and stable operation of the system is ensured.
Description
Technical Field
The utility model relates to an automatic cleaning system for an online sample pipeline, and belongs to the technical field of online analysis systems.
Background
In an online water quality analysis system, a commonly taken sample is wastewater, sewage or rainwater, the sample contains a large amount of particle impurities, a conventional sample pipeline system is only provided with a filter, but the particle impurities are easily accumulated in the filter slowly, so that the filter and a rear-end sample pipeline are blocked; when the operation of the analyzer is stopped, the blocked filter and the pipeline are removed and cleaned, and then the installation and leakage test is carried out, so that the shutdown time of the instrument is greatly prolonged, the normal operation efficiency of the whole system is reduced, and the maintenance cost is greatly increased.
Therefore, the design of a set of on-line sample pipeline cleaning system is particularly important, the automatic cleaning of the pipeline is realized, the manual maintenance cost is reduced, and the operation efficiency of the whole analyzer system is improved.
Disclosure of Invention
The purpose of the utility model is that: aiming at the problem that a sample pipeline of an online water quality analysis system is easy to block, the online sample pipeline automatic cleaning system is provided, and the automatic cleaning maintenance of a dirty sample pipeline system is realized.
In order to achieve the above purpose, the technical scheme of the utility model is to provide an on-line automatic cleaning system for a sample pipeline, which comprises a sample injection pipeline, a residual liquid pipeline after analysis, a cleaning pipeline and a solenoid valve air source pipeline;
the sample injection pipeline is provided with an N01 interface for sample injection, the N01 interface is sequentially connected with a cut-off ball valve A-1, a normally open pneumatic valve C-1, a filter F, a normally open pneumatic valve C-2, a flowmeter G-1 and an analyzer in series, and the analyzer is connected to a PLC control system;
the residual liquid pipeline after analysis comprises a normally open pneumatic valve C-3, a one-way valve E-2 and a discharge port N02 for discharging residual liquid, which are sequentially connected in series with a liquid outlet of the analyzer;
the filter F is used for discharging a bypass port for filtering impurities, and the bypass port is sequentially connected with the normally open pneumatic valve C-4, the flowmeter G-2 and the discharge port N02 in series;
the cleaning pipeline is provided with an N03 interface for accessing deionized water, and the N03 interface is sequentially connected with a normally-closed pneumatic valve D-1 and a one-way valve E-1 in series and is connected to a normally-open pneumatic valve C-2;
the electromagnetic valve air source pipeline is provided with an N04 interface for accessing air source air, the N04 interface is connected with the cutoff ball valve A-3 and then is divided into four parallel air source branches a, b, c, d, each air source branch is provided with an independent PLC control electromagnetic valve and is connected to a PLC control system, and the air source branch b is also provided with two parallel branches b-1 and b-2;
the air source branches a, b-1, b-2, C and D are respectively connected to the normally closed pneumatic valve D-1, the normally open pneumatic valve C-2, the normally open pneumatic valve C-3, the normally open pneumatic valve C-1 and the normally open pneumatic valve C-4;
the flow meters G-1 and G-2 are respectively selected from flow meters which are regulated by needle valves and have low flow alarm output, and are connected with a PLC control system.
Preferably, three-way ball valves connected with the PLC control electromagnetic valves in parallel are arranged on the air source branches, and the three-way ball valves are provided with emptying ports.
Compared with the prior art, the utility model has the beneficial effects that:
(1) According to the on-line sample pipeline automatic cleaning system, the flowmeter is adjusted by the needle valve and has low-flow alarm output, so that the flow can be adjusted, the alarm signal can be output to be interlocked with the PLC while the flow is observed, and the automatic cleaning of the system is realized; in addition, the electromagnetic valve of the control loop is simultaneously connected with a manual three-way ball valve in parallel, so that the system has the function of manually cleaning the pipeline;
(2) The system adopts a mode that the electromagnetic valve drives the pneumatic valve through the air source, the circuit of the control loop and the waterway of the sample loop are separated, and the safe and stable operation of the system is ensured; in addition, a one-way valve is arranged at a sample discharge port of the analyzer, so that a sampling loop of the back-end pipeline sample backflow analyzer is avoided; the deionized water pipeline is provided with a one-way valve so as to prevent the sample from entering the deionized water pipeline to pollute the deionized water.
Drawings
FIG. 1 is a schematic diagram of an on-line sample tube automatic cleaning system according to the present utility model.
Detailed Description
In order to make the utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Examples
Referring to fig. 1, the on-line automatic cleaning system for sample pipes provided by the present utility model includes:
cut-off ball valves A-1, A-2, A-3, three-way ball valves B-1, B-2, B-3, B-4, pneumatic valves (normally open) C-1, C-2, C-3, C-4, pneumatic valves (normally closed) D-1, one-way valves E-1, E-2, a filter F, flow meters G-1, G-2, solenoid valves S-1, S-2, S-3, S-4, programmable logic controllers PLC.
The sample tubing set is described as follows:
the sample enters a cut-off ball valve A-1 through an N01 interface, is connected with a normally open pneumatic valve C-1, then passes through a filter F, is connected with a normally open pneumatic valve C-2, and further enters an analyzer ANA through a flowmeter, and the residual liquid after analysis of the analyzer is discharged to a discharge port N02 at normal pressure by frequently opening the pneumatic valve C-3 and a one-way valve E-2; the bypass port of the sample filter F carrying impurities is connected to the normally open pneumatic valve C-4 and the flowmeter G-2 to the discharge port N02 for normal pressure discharge.
The cleaning pipeline is described as follows:
deionized water for cleaning enters the cut-off ball valve A-2 through an N03 interface, is connected to the normally closed pneumatic valve D-1, and is connected to a sample pipeline through the one-way valve E-1.
The solenoid valve air supply pipeline is described as follows:
air source air enters the cut-off ball valve A-3 through an N04 interface and then is divided into 4 different branches to respectively enter the electromagnetic valve S-1/three-way ball valve B-1, the electromagnetic valve S-2/three-way ball valve B-2, the electromagnetic valve S-3/three-way ball valve B-3 and the electromagnetic valve S-4/three-way ball valve B-4; the air source a is connected to the pneumatic valve D-1, the air sources b-1/b-2 are respectively connected to the pneumatic valve C-2/C-3, the air source C is connected to the pneumatic valve C-1, and the air source D is connected to the pneumatic valve C-4.
The implementation method for automatically cleaning the sample pipeline comprises the following steps:
when the flow meters G-1/G-2 are low in flow alarm, the filter and the pipeline are indicated to be blocked, the flow meter alarm signals are given to the PLC, the PLC trigger signals are given to the analyzer ANA to stop sampling analysis, and meanwhile, the electromagnetic valves S-1/S-3/S-4 are controlled to act, an air source a/C/D is respectively sent out to open the deionized water pneumatic valve D-1 for cleaning the pipeline, and the sample pipeline pneumatic valve C-1 and the pneumatic valve C-4 are closed; the cleaning water flows through the pneumatic valve D-1, starts to clean the sample and flows through the pneumatic valve C-2, the flowmeter G-1, the analyzer ANA, the pneumatic valve C-3 and the one-way valve E-2 to the discharge port N02;
when the alarm of the flowmeter G-1 is eliminated, the PLC controls the electromagnetic valve S-2/S-4 to act to respectively send out the air sources b-1/b-2 and d, the air source b-1/b-2 closes the pneumatic valves C-2 and C-3, and the air source d opens the pneumatic valve C-4; the cleaning water passes through the pneumatic valve D-1, the one-way valve E-1, the filter F, the pneumatic valve C-4, the discharge port N02 and the discharge valve, and the flow meter G-2 for alarm elimination; and (5) finishing the cleaning. Resetting the 4 electromagnetic valves S-1/S-2/S-3/S-4, and discharging residual air in the pipeline from V01/V02/V03/V04; the sample pipeline enters a normal conveying sample, and the analyzer enters a normal analysis state.
Claims (2)
1. An on-line sample pipeline automatic cleaning system is characterized by comprising a sample injection pipeline, an analyzed residual liquid pipeline, a cleaning pipeline and a solenoid valve air source pipeline;
the sample injection pipeline is provided with an N01 interface for sample injection, the N01 interface is sequentially connected with a cut-off ball valve A-1, a normally open pneumatic valve C-1, a filter F, a normally open pneumatic valve C-2, a flowmeter G-1 and an analyzer in series, and the analyzer is connected to a PLC control system;
the residual liquid pipeline after analysis comprises a normally open pneumatic valve C-3, a one-way valve E-2 and a discharge port N02 for discharging residual liquid, which are sequentially connected in series with a liquid outlet of the analyzer;
the filter F is used for discharging a bypass port for filtering impurities, and the bypass port is sequentially connected with the normally open pneumatic valve C-4, the flowmeter G-2 and the discharge port N02 in series;
the cleaning pipeline is provided with an N03 interface for accessing deionized water, and the N03 interface is sequentially connected with a normally-closed pneumatic valve D-1 and a one-way valve E-1 in series and is connected to a normally-open pneumatic valve C-2;
the electromagnetic valve air source pipeline is provided with an N04 interface for accessing air source air, the N04 interface is connected with the cutoff ball valve A-3 and then is divided into four parallel air source branches a, b, c, d, each air source branch is provided with an independent PLC control electromagnetic valve and is connected to a PLC control system, and the air source branch b is also provided with two parallel branches b-1 and b-2;
the air source branches a, b-1, b-2, C and D are respectively connected to the normally closed pneumatic valve D-1, the normally open pneumatic valve C-2, the normally open pneumatic valve C-3, the normally open pneumatic valve C-1 and the normally open pneumatic valve C-4;
the flow meters G-1 and G-2 are respectively selected from flow meters which are regulated by needle valves and have low flow alarm output, and are connected with a PLC control system.
2. The on-line sample tube automatic cleaning system according to claim 1, wherein each air source branch is provided with a three-way ball valve connected in parallel with a PLC control electromagnetic valve, and the three-way ball valve is provided with an emptying port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222466240.3U CN218917364U (en) | 2022-09-15 | 2022-09-15 | Online sample pipeline self-cleaning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222466240.3U CN218917364U (en) | 2022-09-15 | 2022-09-15 | Online sample pipeline self-cleaning system |
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| Publication Number | Publication Date |
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| CN218917364U true CN218917364U (en) | 2023-04-25 |
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| CN202222466240.3U Active CN218917364U (en) | 2022-09-15 | 2022-09-15 | Online sample pipeline self-cleaning system |
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- 2022-09-15 CN CN202222466240.3U patent/CN218917364U/en active Active
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