CN214408633U - Non-metal pipeline thermal aging test device under simulation industrial water delivery environment - Google Patents
Non-metal pipeline thermal aging test device under simulation industrial water delivery environment Download PDFInfo
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- CN214408633U CN214408633U CN202022327254.8U CN202022327254U CN214408633U CN 214408633 U CN214408633 U CN 214408633U CN 202022327254 U CN202022327254 U CN 202022327254U CN 214408633 U CN214408633 U CN 214408633U
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Abstract
The utility model relates to the technical field of non-metallic material performance evaluation, and provides a non-metallic pipeline thermal aging test device under a simulated industrial water delivery environment, which comprises a liquid phase circulating system, an external air supply system and a heating and heat preservation system; the liquid phase circulating system comprises a circulating water pump, a main pipeline and a plurality of test section pipelines embedded in the main pipeline; the liquid phase circulating system forms a closed loop; the external gas supply system outputs test gas for the liquid phase circulating system and provides test pressure; the heating and heat-preserving system heats and preserves heat of the liquid in the closed pipeline; the control system is respectively connected with the other 3 systems through signals. The utility model can evaluate the anti-aging performance of the industrial water delivery non-metal pipeline under the long-term service condition, and predict the service life of the non-metal pipeline under the service working condition; the aging environment parameters of the nonmetal pipeline under the actual service condition can be simulated, the actual service environment of the nonmetal pipeline can be simulated to the maximum extent, and feasible guidance is provided for the service life prediction of the nonmetal pipeline.
Description
Technical Field
The utility model relates to a technical field of non-metallic material performance evaluation, in particular to non-metallic pipeline heat aging test device under simulation industry water delivery environment.
Background
During processing, storage and use, under the combined action of factors such as light, heat, oxygen and the like, the non-metal materials such as plastics and the like have poor non-metal performance due to degradation or crosslinking of polymers, the appearance becomes yellow, and finally the use value is lost. Non-metallic materials are often used as communication cables, pipes, packaging materials and the like, and have become one of the indispensable main materials in various fields of national economy such as industry, agriculture and life. However, the non-metallic material is inevitably aged by external environmental factors such as light, heat, oxygen, industrial harmful gases, microorganisms and the like in the using process, and the physical and mechanical properties of the non-metallic material are gradually deteriorated, so that the use value is finally lost, and the transmission medium is leaked. Therefore, the aging behavior of the non-metal needs to be evaluated to determine the service life of the non-metal material.
The aging period of the nonmetal is long, and the experimental evaluation cannot be completed in a short period generally, and the prior art generally adopts two methods to evaluate the aging behavior of the nonmetal: firstly, the sampling test is directly carried out on the service pipeline, and the defect that the service life of the pipeline cannot be judged in advance before the pipeline is laid is overcome; secondly, an aging evaluation experiment is carried out in a laboratory, but the current aging experiment is usually carried out by adopting a sealed pipe section, only parameters such as temperature, illumination and the like are considered, and the combined action of gas, liquid and temperature in a flowing state in a pipeline under an actual service environment on the aging of the nonmetal pipeline cannot be truly simulated, so that the evaluation on the thermal aging performance of the nonmetal pipeline is not accurate.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, provide a nonmetal pipeline heat aging test device under simulation industry water delivery environment, nonmetal pipeline heat aging action under can the true simulation industry water delivery environment.
The utility model adopts the following technical scheme:
a non-metal pipeline thermal aging test device under a simulated industrial water delivery environment comprises a liquid phase circulation system, an external gas supply system, a heating and heat preservation system and a control system;
the liquid phase circulating system comprises a circulating water pump, a main pipeline and a plurality of test section pipelines; the plurality of test pipelines are embedded in the main pipeline; the liquid phase circulation system forms a closed loop;
the external gas supply system is used for outputting test gas for the liquid phase circulating system and providing test pressure for the liquid phase circulating system;
the heating and heat-preserving system is used for heating and preserving heat of the liquid in the closed pipeline and simulating the temperature of the industrial water delivery environment;
and the control system is respectively in signal connection with the circulating water pump, the external gas supply system and the heating and heat-preserving system.
Further, the control system is a controller.
Furthermore, the test section pipeline is connected with the main body pipeline through a flange plate; the plurality of test section pipelines are connected in series or in parallel; and a flowmeter is arranged on the main pipeline and used for monitoring the flow rate of the circulating liquid.
Furthermore, a liquid taking port is arranged on the main pipeline and is used for taking liquid at any time in the test process to analyze the components of the medium.
Furthermore, the test section pipeline is made of polyethylene, and the main pipeline is made of a corrosion-resistant metal material;
the flange plates are connected with the nonmetal test section pipeline and the metal main body pipeline through hot melting respectively, fluorine rubber gaskets are added between the two flange plates, and the two flange plates are fastened by bolts and nuts.
Furthermore, the main pipeline is made of a corrosion-resistant metal material.
Further, the external gas supply system comprises a high-pressure gas cylinder, a pressure reducing valve and a buffer tank; the high-pressure gas cylinder is connected with the buffer tank through the pressure reducing valve, and the buffer tank is arranged in the closed loop;
the gas in the high-pressure gas cylinder is controlled by the pressure reducing valve and then enters the buffer tank through the gas guide pipe, and the gas buffered by the buffer tank enters the closed loop; the pressure reducing valve is in signal connection with the control system.
Further, a pressure transmitter is arranged on the buffer tank and used for monitoring the gas pressure;
further, 3 electrode binding posts are arranged on a kettle cover of the buffer tank and penetrate through the inside and the outside of the buffer tank so as to establish the electric connection between the inside and the outside of the buffer tank; electrode binding posts positioned inside the buffer tank are respectively connected with the saturated mercury reference electrode, the working electrode and the auxiliary electrode, and the electrode binding posts positioned outside the buffer tank are directly connected with the electrochemical workstation; and the electrochemical data analysis of the internal electrode of the buffer tank is used for determining the corrosivity of the solution system in the buffer tank on the experimental material.
Further, a feed inlet is arranged on the cover of the buffer tank and used for adding auxiliary materials (including but not limited to various acids, alkalis, salts, corrosion inhibitors and other chemical medicines) in the test process.
Further, the heating and heat preservation system comprises a heating device and a temperature sensor; the heating device is arranged on the periphery of the buffer tank and is used for heating the circulating liquid in the buffer tank; the temperature sensor is arranged in the main pipeline and is in signal connection with the control system.
Furthermore, real-time temperature and pressure are displayed through a controller, and heating is stopped when the set temperature is reached.
Furthermore, the number of the test pipelines is 4-8, and the test pipelines are connected in series or in parallel and used for increasing available data points and reducing test errors.
Further, be provided with the needle valve on the main part pipeline, the waste liquid treatment case is connected to the needle valve, and circulating liquid can pass through the needle valve discharges the waste liquid treatment case.
Furthermore, as the failure time and the failure position of the long-period failure test of the non-metal pipeline cannot be effectively determined, and danger is possibly generated to testers in the test and recording processes, a polyvinyl chloride soft transparent roller shutter is additionally arranged outside the closed loop, and is made of polyvinyl chloride plastic, transparent and soft; on one hand, the observation loop test is not influenced, the operation is convenient, and on the other hand, the personnel safety is ensured.
The utility model has the advantages that:
1. compared with other common thermal aging experimental devices, the liquid phase circulating system, the gas supply system and the electrochemical testing system are added, almost all parameters of the non-metal pipeline such as liquid phase flow state, flow velocity, liquid phase components, gas components, pressure and temperature in the pipeline under actual service conditions can be truly simulated, the electrochemical parameters in the pipeline can be monitored in real time, and the whole experimental device has high stability and safety.
2. The method has the advantages of strong operability, long service life, strong adaptability and practicality, and can meet the pressure temperature and flow rate conditions required by long-term thermal aging tests. The device can monitor the oxidation-reduction potential of the test liquid in real time through the reference electrode and the platinum electrode; the liquid taking port can realize easy sampling at any time and detect the medium components; auxiliary materials can be added at any time through the feed inlet.
3. The device can truly simulate the conditions of real flow state, flow speed, pressure, temperature and the like of the medium in the industrial water delivery pipeline, and the requirement of the thermal aging test of the non-metal pipeline is met to the maximum extent, so that the experimental data closer to the actual working condition can be obtained, and the feasibility guidance is provided for the life prediction of the non-metal pipeline.
Drawings
Fig. 1 is a schematic structural diagram of a non-metal pipeline thermal aging test device under a simulated industrial water delivery environment according to an embodiment of the present invention.
Wherein: 1-a high-pressure gas cylinder; 2-a pressure reducing valve; 3-needle valve; 4-a pressure transmitter; 5-a heating device; 6-a buffer tank; 7-liquid taking valve; 8-a temperature sensor; 9-a flange; 10-test section pipeline A; 11-test section pipeline B; 12-test section pipeline C; 13-test section pipeline D; 14-test section pipeline E; 15-a flow meter; 16-a drain valve; 17-a circulating water pump; 18-flow regulating valve.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that technical features or combinations of technical features described in the following embodiments should not be considered as being isolated, and they may be combined with each other to achieve better technical effects. In the drawings of the embodiments described below, the same reference numerals appearing in the respective drawings denote the same features or components, and may be applied to different embodiments.
As shown in fig. 1, the device for simulating thermal aging of a non-metal pipeline in an industrial water delivery environment according to the embodiment of the present invention comprises a liquid phase circulation system, an external gas supply system, a heating and heat preservation system and a control system; the control system is preferably a controller; and the control system is respectively in signal connection with the circulating water pump, the external gas supply system and the heating and heat-preserving system.
Preferably, the external gas supply system comprises a high-pressure gas cylinder 1, a pressure reducing valve 2, a pressure transmitter 4 and a buffer tank 6; the liquid phase circulating system comprises a flowmeter 15, a circulating water pump 17, a main pipeline and a plurality of test section pipelines 10-14; the heating and heat preservation system comprises a heating device 5 and a temperature sensor 8.
In this embodiment, the test section pipelines are 5 (but not limited to 5), which are respectively the test section pipelines a-E, and can be connected in series or in parallel, in this embodiment, they are connected in series.
Preferably, through threaded connection between external gas supply system high pressure gas cylinder 1 and the relief pressure valve 2 air inlet, experimental gas (including but not limited to gas such as oxygen, nitrogen gas, carbon dioxide, hydrogen sulfide) of external gas supply system output gets into buffer tank 6 through the air duct after relief pressure valve 2 accuse pressure, and through its buffering after-effect and get into in the system to for whole closed loop provides pressure, be equipped with pressure transmitter 4 on the buffer tank 6, system's pressure accessible pressure transmitter 4 monitors. A charging hole is arranged on the cover of the buffer tank 6, and auxiliary materials can be added in the test process.
The circulating water pump 17 controls the flow rate of the liquid, is connected with the flow meter 15, monitors the flow rate of the liquid phase in real time, and can adjust the flow rate of the liquid through the flow regulating valve 18. The heating device 5 is arranged on the outer side of the buffer tank 6, the buffer tank 6 is connected with the circulating water pump 17, and circulating water can be introduced to control the temperature.
The material of the main pipeline of the closed loop is a corrosion-resistant metal material, such as stainless steel; the test section pipelines 10-14 are made of polyethylene. The main pipeline is connected with the test section pipelines 10-14 through the flange 9, and a multi-section test section pipeline can be designed for parallel experiments, so that available data points are increased, and experiment errors are reduced.
It should be noted that the material of the test segment pipes 10 to 14 is not only suitable for polyethylene, but also can be other high polymer materials.
Preferably, the main pipeline is provided with a liquid taking port, so that liquid can be taken at any time in the test process to monitor the medium composition, and the fluid is ensured to meet the test requirements. The temperature of the liquid phase in the test section pipelines 10-14 can be monitored by a temperature sensor 8, and the main pipeline is provided with a needle valve 3. The liquid can be directly discharged out of the loop system without circulation, and is provided with a waste liquid treatment box, so that the liquid is prevented from polluting the environment, and the environment-friendly effect is achieved.
Preferably, a transparent soft PVC roller shutter is arranged outside the closed loop, so that on one hand, the loop test is not influenced, the operation is convenient, and on the other hand, the personnel safety is ensured.
The utility model discloses can assess the ageing resistance performance of industry water delivery polyethylene pipeline under long-term service condition to this predicts the life of polyethylene pipeline under the working condition of service. The device can simulate most aging parameters of polyethylene pipelines under actual use conditions: the requirements of the polyethylene pipeline heat aging test are met to the greatest extent by flow state, flow speed, pressure, temperature, oxygen concentration, oxidant concentration and the like, so that experimental data closer to actual working conditions can be obtained, and feasibility guidance is provided for service life prediction of the polyethylene pipeline.
While several embodiments of the present invention have been presented herein, it will be appreciated by those skilled in the art that changes can be made to the embodiments herein without departing from the spirit of the invention. The above-described embodiments are merely exemplary and should not be taken as limiting the scope of the invention.
Claims (10)
1. A non-metal pipeline thermal aging test device under a simulated industrial water delivery environment is characterized by comprising a liquid phase circulating system, an external gas supply system, a heating and heat preservation system and a control system;
the liquid phase circulating system comprises a circulating water pump, a main pipeline and a plurality of test section pipelines; the plurality of test section pipelines are embedded in the main pipeline; the liquid phase circulation system forms a closed loop;
the external gas supply system is used for outputting test gas for the liquid phase circulating system and providing test pressure for the liquid phase circulating system;
the heating and heat-preserving system is used for heating and preserving heat of the liquid in the closed loop and simulating the temperature of the industrial water delivery environment;
and the control system is respectively in signal connection with the circulating water pump, the external gas supply system and the heating and heat-preserving system.
2. The test device for simulating the thermal aging of the non-metallic pipeline under the industrial water delivery environment according to claim 1, wherein the test section pipeline is connected with the main pipeline through a flange plate; the plurality of test section pipelines are connected in series or in parallel; and a flowmeter is arranged on the main pipeline.
3. The device for simulating the thermal aging test of the non-metallic pipeline under the industrial water delivery environment as claimed in claim 2, wherein the main pipeline is provided with a liquid taking port.
4. The device for simulating the thermal aging test of the non-metallic pipeline under the industrial water delivery environment according to claim 2, wherein the test section pipeline is made of non-metal, and the main pipeline is made of corrosion-resistant metal;
the flange plates are connected with the nonmetal test section pipeline and the metal main body pipeline through hot melting respectively, fluorine rubber gaskets are added between the two flange plates, and the two flange plates are fastened by bolts and nuts.
5. The device for simulating the thermal aging test of the non-metallic pipeline in the industrial water delivery environment according to any one of claims 1 to 4, wherein the external gas supply system comprises a high-pressure gas cylinder, a pressure reducing valve and a buffer tank; the high-pressure gas cylinder is connected with the buffer tank through the pressure reducing valve; the buffer tank is arranged in the closed loop;
the gas in the high-pressure gas cylinder is controlled by the pressure reducing valve and then enters the buffer tank through the gas guide pipe, and the gas buffered by the buffer tank enters the closed loop; the pressure reducing valve is in signal connection with the control system.
6. The device for simulating the thermal aging test of the non-metallic pipeline under the industrial water delivery environment according to claim 5, wherein a pressure transmitter for monitoring the gas pressure is arranged on the buffer tank;
3 electrode binding posts are arranged on a kettle cover of the buffer tank and penetrate through the inside and the outside of the buffer tank so as to establish the electric connection between the inside and the outside of the buffer tank; and electrode binding posts positioned inside the buffer tank are respectively connected with the saturated mercury reference electrode, the working electrode and the auxiliary electrode, and the electrode binding posts positioned outside the buffer tank are directly connected with the electrochemical workstation.
7. The device for simulating the thermal aging test of the non-metallic pipeline in the industrial water delivery environment according to claim 5, wherein a charging hole is arranged on the cover of the buffer tank.
8. The device for simulating the thermal aging test of the non-metallic pipeline under the industrial water delivery environment according to claim 5, wherein the heating and heat-preserving system comprises a heating device and a temperature sensor; the heating device is arranged on the periphery of the buffer tank; the temperature sensor is arranged in the main pipeline and is in signal connection with the control system.
9. The device for simulating the thermal aging test of the non-metallic pipeline under the industrial water delivery environment as claimed in claim 2, wherein the number of the test section pipelines is 4-8, and the test section pipelines are connected in series or in parallel.
10. The device for simulating the thermal aging test of the non-metal pipeline under the industrial water delivery environment as claimed in claim 5, wherein a needle valve is arranged on the main pipeline, the needle valve is connected with a waste liquid treatment box, and circulating liquid can be discharged to the waste liquid treatment box through the needle valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022327254.8U CN214408633U (en) | 2020-10-19 | 2020-10-19 | Non-metal pipeline thermal aging test device under simulation industrial water delivery environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022327254.8U CN214408633U (en) | 2020-10-19 | 2020-10-19 | Non-metal pipeline thermal aging test device under simulation industrial water delivery environment |
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| CN214408633U true CN214408633U (en) | 2021-10-15 |
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| CN202022327254.8U Active CN214408633U (en) | 2020-10-19 | 2020-10-19 | Non-metal pipeline thermal aging test device under simulation industrial water delivery environment |
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