CN211505024U - Pipeline air pressure test system of fine chemical project - Google Patents
Pipeline air pressure test system of fine chemical project Download PDFInfo
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- CN211505024U CN211505024U CN201922135796.2U CN201922135796U CN211505024U CN 211505024 U CN211505024 U CN 211505024U CN 201922135796 U CN201922135796 U CN 201922135796U CN 211505024 U CN211505024 U CN 211505024U
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Abstract
The utility model relates to a pipeline atmospheric pressure test system of worker's project becomes more meticulous, this system includes: one liquid nitrogen Dewar bottle; a sequence control panel and a matched charging pipe; the high, medium and low three-stage nitrogen cylinder group and the nitrogen cylinder group are provided with an air outlet collecting pipeline. The system comprises a high-pressure nitrogen cylinder group, a medium-pressure nitrogen cylinder group, a low-pressure nitrogen cylinder group, a liquid nitrogen Dewar flask, a sequence control panel, a high-pressure valve, a pipeline and a header pipe, wherein an air outlet of the liquid nitrogen Dewar flask with a gasifier is in flexible connection with an inlet of the sequence control panel through a metal pipeline, three pipelines separated by the sequence control panel are respectively connected with air inlets of the high-pressure nitrogen cylinder group, the medium-pressure nitrogen cylinder group and the. The utility model discloses a reducible cost of system, raise the efficiency, proof quality, application are extensive, can regard as the permanent nitrogen gas device of system again to use.
Description
Technical Field
The utility model belongs to pipeline atmospheric pressure test system field of fine chemistry industry project relates to one set of equipment of fine chemistry industry project pipeline atmospheric pressure test, and the pressure test scope control is within 2.0MPa, specifically is a pipeline atmospheric pressure test system of fine chemistry project.
Background
At present, fine chemical engineering projects are raised in China, and the fine chemical engineering projects have the following characteristics: the number of devices is large; the pipeline system is many, the material is many, the technology medium is many, has more monomer technology package and integrated sled device, and the actual operation that the pipeline carries out gas pressure test in such project has many problems, and the pipeline design medium is many at first, and all can not the cross-over connection form the technology package, will have many pressure testing technology package like this. And secondly, the high-cleanliness conventional compressed gas of the fine chemical pipeline is not suitable for use. The most important is that the design pressure of the fine chemical pipeline is more than grade, and test gases with various pressure grades need to be prepared.
To sum up the relevant condition of fine chemical pipeline, the atmospheric pressure is experimental need choose for use the equipment that the gas output is big, outlet pressure is high if adopt the air compressor machine to carry out the pressure testing, and gaseous need through drying and deoiling reach the clean back and just can get into the pipeline, and pressure testing work period is tighter moreover, uses the air compressor machine to develop work simultaneously, has just so caused and needs purchase or rent many air compression equipment at the same time, and will put through more temporary power supply, and the expense cost is higher. Adopt single nitrogen cylinder pressure testing to need continuous change high-pressure gas cylinder, along with the continuous rising of pipe-line system pressure, the pressure differential of nitrogen cylinder and system reduces gradually, and usable nitrogen gas volume will reduce gradually in the follow-up nitrogen cylinder, has caused frequently to dismantle and change high-pressure nitrogen cylinder, and the process is loaded down with trivial details, has also increased the insecurity of operation.
Therefore, the fine chemical engineering pipeline air pressure test needs a fine chemical engineering station project pipeline air pressure test system which simplifies the flow, has clean and sufficient medium, shortens the construction period and reduces the cost, overcomes the defects of the gas pressure test method, breaks through the traditional gas pressure test method, ensures the safety of the pressure test work, shortens the construction period and reduces the cost.
SUMMERY OF THE UTILITY MODEL
Based on this, the inventor of this application has developed a pipeline atmospheric pressure test system of fine-grained engineering through exploring and studying, through improving construction process and construction equipment, has broken through traditional gas pressure testing's method, adopts liquid nitrogen dewar bottle gasification stage to pressurize and gets into nitrogen cylinder group pressure testing system and carry out the atmospheric pressure test, when avoiding renting or purchasing many air compressors and carry out the atmospheric pressure test, has reduced the operating time of suppressing, has also guaranteed the cleanliness factor of pipeline. Finally, the purposes of simplifying the flow, shortening the construction period and reducing the cost are achieved, and obvious economic benefits are achieved.
The technical scheme of the utility model is a pipeline air pressure test system of fine engineering project, the system includes the nitrogen cylinder group that comprises high pressure nitrogen cylinder group, medium pressure nitrogen cylinder group and low pressure nitrogen cylinder group, liquid nitrogen dewar bottle, the sequence control dish that is used for adjusting pressure and pressurizes in grades;
the device comprises a sequence control panel, a high-pressure nitrogen cylinder group, a medium-pressure nitrogen cylinder group, a low-pressure nitrogen cylinder group, a high-pressure cylinder group, a medium-pressure nitrogen cylinder group and a low-pressure nitrogen cylinder group, wherein an air outlet of a gasifier of the liquid nitrogen Dewar bottle is connected with an inlet of the sequence control panel through pipelines, three pipelines separated by the sequence control panel are respectively connected with air inlets of the high-pressure nitrogen cylinder group, the medium-pressure nitrogen cylinder group and the low-pressure nitrogen cylinder group, outlets of the high-pressure nitrogen cylinder group, the medium-pressure nitrogen cylinder group and the low-pressure nitrogen cylinder group are provided with pipeline gathering assembly pressure test filling main pipes and/or outlets of the high-pressure nitrogen cylinder group, the medium-pressure nitrogen cylinder group and the low-pressure nitrogen cylinder group are independently communicated with corresponding low-pressure cylinder group pressure test filling pipes, high-pressure cylinder group pressure test filling pipes and medium-pressure cylinder group pressure test filling pipes to serve.
Further, the high-pressure nitrogen gas cylinder group, the medium-pressure nitrogen gas cylinder group, and the low-pressure nitrogen gas cylinder group may each include one or more nitrogen gas cylinders (e.g., 1 to 3), and in one embodiment, the nitrogen gas cylinder group is composed of a high-pressure nitrogen gas cylinder, a medium-pressure nitrogen gas cylinder, and a low-pressure nitrogen gas cylinder tertiary nitrogen gas cylinder group consisting of six nitrogen gas cylinders in the number of 1:2: 3. The pressure ranges of the high-pressure nitrogen gas cylinder group, the medium-pressure nitrogen gas cylinder group and the low-pressure nitrogen gas cylinder group are 0.8-1.2 MPa, 0.4-0.8 MPa and 0-0.4 MPa respectively, the pressure is a common pressure value, the pressure regulating valve of the sequence control disk can regulate the pressure within 2.0MPa at will so as to meet the pressure requirement of a pipeline to be tested, and the volume range is 60-100L.
Furthermore, the high-pressure nitrogen cylinder group, the medium-pressure nitrogen cylinder group and the low-pressure nitrogen cylinder group are respectively assembled together through section steel, movable wheels are installed on the movable wheels, and valves are installed at air inlets of the cylinder groups.
In one embodiment, the liquid nitrogen dewar has a volume of 0.6m3And after gasification, about 380 marked nitrogen completely can be used in a large monomer chemical workshop, and the nitrogen enters a nitrogen cylinder group through three-level pressure filling, so that pipeline filling with different pressure levels can be realized, and meanwhile, the nitrogen cylinder group is formed by combining a plurality of nitrogen cylinders in a gas collecting device, and can realize simultaneous gas supply of the plurality of nitrogen cylinders.
The technical scheme has the following beneficial effects:
1. adopt clean nitrogen gas as atmospheric pressure test medium, can effectively keep the cleanliness factor in the fine chemical pipeline, changed the compressed air of traditional air compressor machine preparation, need carry out drying and deoiling to compressed air promptly, and also difficult control handles the gaseous cleanliness factor after, causes secondary pollution to the pipeline extremely easily.
2. Dewar bottle storage liquid nitrogen, 1 cubic meter liquid nitrogen can gasify out the nitrogen gas of 600 more cubic meters, and consequently the nitrogen gas reserves are big, can better carry out pressure test, and it is little to have reduced ordinary nitrogen cylinder tolerance, the work that needs frequent change, influences work efficiency promptly and increases great gas cylinder transportation work load again.
3. The nitrogen cylinder group is filled in the sequencing control panel grading, and nitrogen cylinder group component height, well, low three groups can adapt to the pipeline pressure test that design pressure is different, especially to non-metallic pipeline, preferentially uses low pressure bottle group pressure testing, can effectively protect the pipeline body, avoids the superpressure to damage.
4. The nitrogen cylinder group is free from being disassembled, is convenient to move, and can be simultaneously opened to fill under the condition of large volume of the pipeline, so that the boosting speed is improved.
5. The nitrogen is the necessary replacement gas in the fine chemical industry operation maintenance, and the nitrogen produced by the liquid nitrogen Dewar flask has relatively large nitrogen supply, can be stored in a pressure grading way, and is suitable for the replacement, isolation, blowing and other works in various maintenance, so the device can be completely handed to a construction unit together in an equal-quota manner of engineering after the engineering is finished.
In conclusion, the device system not only reduces the cost, improves the efficiency, ensures the quality and has wide application, but also can be used as a device for producing nitrogen for a long time, which is a perpetual one.
In order to make the technical means of the present invention more clearly understood and to make the same practical in accordance with the contents of the specification, the present invention is further described with reference to the following examples and the accompanying drawings.
Drawings
Fig. 1 is the schematic diagram of the pipeline air pressure test system of the fine chemical project of the utility model.
Description of the reference numerals
1, testing pressure and filling a main pipe; 2, filling the pipe by pressure test of the low-pressure bottle group; 3, filling a pipe for pressure test of the high-pressure bottle group;
4, testing the pressure of the filling pipe by the medium-pressure bottle group; 5, sequentially filling an opening and closing valve; 6-sequence control panel;
7-liquid nitrogen dewar flask; 8-low pressure nitrogen cylinder group; 9-high pressure nitrogen cylinder group;
10-medium pressure nitrogen cylinder group; 11-nitrogen gas outlet header pipe; 12-filling a pipeline by the medium-pressure bottle group;
13-filling a pipeline by the high-pressure bottle group; and 14, filling a pipeline by using the low-pressure bottle group.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a pipeline atmospheric pressure test system of fine chemical project includes: the nitrogen gas cylinder group consists of a high-pressure nitrogen gas cylinder group 9, a medium-pressure nitrogen gas cylinder group 10 and a low-pressure nitrogen gas cylinder group 8, a liquid nitrogen Dewar flask 7 and a sequence control panel 6;
wherein, the air outlet of the liquid nitrogen Dewar bottle 7 with a gasifier is connected with the inlet of the sequence control panel 6 through a nitrogen outlet main pipe 11, three pipelines 13, 12 and 14 divided by the sequence control panel are respectively connected with the air inlets of the high-pressure nitrogen bottle group, the medium-pressure nitrogen bottle group and the low-pressure nitrogen bottle group, the outlets of the high-pressure nitrogen bottle group 9, the medium-pressure nitrogen bottle group 10 and the low-pressure nitrogen bottle group 8 are provided with pipeline collection assemblies to test the pressure of the filling main pipe 1 and/or the high-pressure nitrogen bottle group, the outlets of the medium-pressure nitrogen cylinder group and the low-pressure nitrogen cylinder are independently communicated with the corresponding low-pressure cylinder group pressure test filling pipe 2, the high-pressure cylinder group pressure test filling pipe 3 and the medium-pressure cylinder group pressure test filling pipe 4 to be used as filling ports in the cylinder group, and three pipelines divided by the sequence control panel 6 are respectively provided with a sequence filling starting and closing valve 5 for controlling the filling of the high-pressure nitrogen cylinder group 9, the medium-pressure nitrogen cylinder group 10 and the low-pressure nitrogen cylinder group 8.
The high pressure nitrogen cylinder group 9, the medium pressure nitrogen cylinder group 10, and the low pressure nitrogen cylinder group 8 may each include one or more nitrogen cylinders (e.g., 1-3), and in one embodiment, the nitrogen cylinder group is composed of a high pressure nitrogen cylinder group 9, a medium pressure nitrogen cylinder group 10, and a low pressure nitrogen cylinder group 8 three-stage nitrogen cylinder group, which are composed of six nitrogen cylinders in the number of 1:2: 3.
In one embodiment, the high pressure nitrogen cylinder group 9, the medium pressure nitrogen cylinder group 10 and the low pressure nitrogen cylinder group 8 are assembled together by section steel to mount a moving wheel and a valve at the air inlet of each cylinder group.
In one embodiment, a high-pressure metal hose is arranged on the pressure test filling main pipe 1 to be connected with an air inlet of a pressure test pipeline, air outlets of the nitrogen cylinder groups 8, 9 and 10 are independently communicated with corresponding 2, 3 and 4 pipelines to be used as filling ports in the cylinder groups, and the three grade cylinder groups are guaranteed to be simultaneously put into use at the time of a high test pressure peak.
The pipeline pressure testing sequence is preferably from high pressure to low pressure, so that nitrogen can be effectively utilized.
The internal pressure of the liquid nitrogen Dewar flask of the device is 2.2MPa, and the pressure after gasification can reach 2MPa, so the system device is only used for the pipeline test with the test pressure less than 2MPa, and simultaneously, in order to embody the technical superiority of the device, the pipeline specification participating in the pressure test needs to be controlled within DN300, thereby the filling speed and the utilization rate of multi-stage pressurizing can be accelerated. Before the device is used, the maximum pressure value of a full-field pipeline test is counted, the value is adjusted to be the low-pressure filling tripping pressure of the sequence control panel for sequentially filling the opening and closing valve, then the highest gasification pressure of the Dewar flask is set to be the high-pressure filling tripping pressure of the sequence control panel, a middle value of the low pressure and the high pressure is selected as the pressure to be set to be the medium-pressure filling tripping pressure of the sequence control panel, and the filling pressure setting is completed. Then marking the high, middle and low bottle groups, making a switch indicator of a valve, closely paying attention to the gasification condition of the gasifier after liquid nitrogen is gasified, removing large-area frost in time to ensure the gasification rate, regulating the sequence by pressure filling according to a sequence control panel, and filling the gas storage bottle groups in the sequence of low, middle and high. After the bottle group is filled, the gas outlet valve is closed, the liquid outlet valve of the Dewar bottle is opened, and the sequence control panel can timely supplement gas into the bottle group. And recording is respectively made at each node in the boosting process. And finishing the test work.
Use the utility model discloses fine chemical engineering project pipeline air pressure test system's advantage has the input cost etc. of saving the pressure testing time, improving work efficiency, having saved manual work, mechanical equipment. The sequence control panel is used for filling the nitrogen cylinder group in a grading way and is provided with a grading overpressure protection device, so that the safety operability of gas pressure test is improved. For example, the pressure test by using nitrogen is mainly suitable for fine chemical engineering with more process packages, more integrated skids, more equipment and short construction period, and the purchase or lease of air compressors and dehydration and oil removal equipment have high cost. Taking 200 pressure test bags and 100 test equipment as examples, in a pressure test period of 30 days, at least 10 process bags need to be tested per day, and at least 5 air compressors and drying and oil removing equipment are needed for 10 process bags, so that 30-day lease expense is about 15 ten thousand yuan, and temporary power supply device and equipment transportation expense, labor expense and material expense are not added to a pressure test system. The cost of using the device is as follows: the price of two 0.6 cubic meter leased Dewar flasks is 30 yuan/day, the liquid nitrogen is 2000 yuan/square, the temporary estimate uses 5 cubic meter liquid nitrogen and leased liquid nitrogen tank total 1.18 ten thousand yuan, the price of the sequence control panel is 3 ten thousand yuan, 6 nitrogen bottles are 3000 yuan, the temporary estimate is 2 ten thousand yuan through the pipe connection and the bracket made of section steel, the basic assembly pipe and valve can use construction residual materials or temporarily use, all the cost total 6.48 ten thousand yuan. The cost is saved by about 8.5 ten thousand yuan. In order to accelerate the filling progress, three groups of nitrogen bottles can be adopted to respectively fill pressure test pipelines with corresponding pressure levels, the nitrogen bottles are all filled simultaneously to realize pressure test, so that the gasification effect is required to be ensured, at this time, a gasifier with large gasification capacity can be added or a dewar bottle is installed with a gasifier to assist heating measures, so that the gasification effect is ensured, the use progress is accelerated, and according to the above engineering conditions, the filling pressure test can be at least 10 days ahead of the air supply of a normal air compressor.
It is right above the embodiment of the present invention provides a detailed introduction to a set of fine chemical engineering pipeline pressure test system, to the general technical personnel in this field, according to the embodiment of the present invention, there are changes and adjustments on the specific implementation and application scope. In summary, the content of the present specification should not be understood as a limitation of the present invention, and any changes made according to the design concept of the present invention are all within the protection scope of the present invention.
Claims (5)
1. A pipeline air pressure test system for fine engineering is characterized by comprising a nitrogen cylinder group, a liquid nitrogen Dewar bottle and a sequence control panel, wherein the nitrogen cylinder group consists of a high-pressure nitrogen cylinder group, a medium-pressure nitrogen cylinder group and a low-pressure nitrogen cylinder group;
the device comprises a sequence control panel, a high-pressure nitrogen cylinder group, a medium-pressure nitrogen cylinder group, a low-pressure nitrogen cylinder group, a high-pressure cylinder group, a medium-pressure nitrogen cylinder group and a low-pressure nitrogen cylinder group, wherein an air outlet of a gasifier of the liquid nitrogen Dewar bottle is connected with an inlet of the sequence control panel through pipelines, three pipelines separated by the sequence control panel are respectively connected with air inlets of the high-pressure nitrogen cylinder group, the medium-pressure nitrogen cylinder group and the low-pressure nitrogen cylinder group, outlets of the high-pressure nitrogen cylinder group, the medium-pressure nitrogen cylinder group and the low-pressure nitrogen cylinder group are provided with pipeline gathering assembly pressure test filling main pipes and/or outlets of the high-pressure nitrogen cylinder group, the medium-pressure nitrogen cylinder group and the low-pressure nitrogen cylinder group are independently communicated with corresponding low-pressure cylinder group pressure test filling pipes, high-pressure cylinder group pressure test filling pipes and medium-pressure cylinder group pressure test filling pipes to serve.
2. The pipeline pressure test system of claim 1, wherein the high pressure nitrogen cylinder bank, the medium pressure nitrogen cylinder bank, and the low pressure nitrogen cylinder bank each comprise one or more nitrogen cylinders.
3. The pipeline air pressure test system of claim 1, wherein the nitrogen gas cylinder group is composed of a high-pressure nitrogen gas cylinder, a medium-pressure nitrogen gas cylinder and a low-pressure nitrogen gas cylinder three-level nitrogen gas cylinder group which are composed of six nitrogen gas cylinders in the number of 1:2: 3.
4. The pipeline pressure test system according to any one of claims 1 to 3, wherein the high pressure nitrogen cylinder group, the medium pressure nitrogen cylinder group and the low pressure nitrogen cylinder group are each assembled together by a section steel to mount a moving wheel and a valve is mounted at the air inlet of each cylinder group.
5. The pipeline pressure test system of claim 1, wherein the liquid nitrogen dewar has a volume of 0.6m3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922135796.2U CN211505024U (en) | 2019-12-03 | 2019-12-03 | Pipeline air pressure test system of fine chemical project |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922135796.2U CN211505024U (en) | 2019-12-03 | 2019-12-03 | Pipeline air pressure test system of fine chemical project |
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| Publication Number | Publication Date |
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| CN211505024U true CN211505024U (en) | 2020-09-15 |
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| CN201922135796.2U Active CN211505024U (en) | 2019-12-03 | 2019-12-03 | Pipeline air pressure test system of fine chemical project |
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