CN221076191U - Static evaporation rate detection constant pressure device for low-temperature heat-insulating gas cylinder - Google Patents
Static evaporation rate detection constant pressure device for low-temperature heat-insulating gas cylinder Download PDFInfo
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- CN221076191U CN221076191U CN202322604599.7U CN202322604599U CN221076191U CN 221076191 U CN221076191 U CN 221076191U CN 202322604599 U CN202322604599 U CN 202322604599U CN 221076191 U CN221076191 U CN 221076191U
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- gas cylinder
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- evaporation rate
- temperature heat
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- 230000008020 evaporation Effects 0.000 title claims abstract description 30
- 238000001704 evaporation Methods 0.000 title claims abstract description 30
- 230000003068 static effect Effects 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 description 43
- 239000012071 phase Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a static evaporation rate detection constant pressure device of a low-temperature heat-insulating gas cylinder, which comprises a base, a temperature sensor and a pressure sensor, wherein a stop valve and a back pressure valve are respectively and fixedly arranged on the base, the inlet end of the stop valve is connected with a joint connected with a vent valve on the low-temperature heat-insulating gas cylinder through a first inlet pipeline, the outlet end of the stop valve is connected with the inlet end of the back pressure valve through a second inlet pipeline, the temperature sensor and the pressure sensor are respectively arranged in the second inlet pipeline, and the outlet end of the back pressure valve is connected with an outlet pipeline. According to the utility model, the back pressure valve is arranged, and after the pressure threshold value is exceeded, the back pressure valve is opened, gas in the low-temperature heat-insulating gas cylinder flows out, and after the heat balance is achieved, the back pressure valve is in a normally open state, so that the gas phase space pressure of the gas cylinder can be maintained at a stable pressure, and the flow of an outlet can be kept stable.
Description
Technical Field
The utility model relates to the technical field of performance detection of low-temperature heat-insulating gas cylinders, in particular to a static evaporation rate detection constant pressure device of a low-temperature heat-insulating gas cylinder.
Background
The low-temperature heat-insulating gas cylinder is a container specially used for storing low-temperature gas (liquid oxygen, liquid nitrogen, liquid argon and the like), and the inside of the low-temperature heat-insulating gas cylinder is generally in a structure of a plurality of layers of heat-insulating materials, a vacuum interlayer and the like, so that heat transfer can be effectively reduced, and the stored low-temperature gas can be kept in a low-temperature state for a long time. The liquid phase in the gas cylinder is low-temperature liquid (-160 ℃ below zero), and the liquid phase is vaporized along with the heat outside the gas cylinder entering the gas cylinder, so that the pressure in the gas cylinder is slowly increased, and the process is complicated and dynamic.
The static evaporation rate detection is a performance detection method special for a low-temperature heat-insulating gas cylinder, as disclosed in the Chinese patent publication No. CN212134401U, a gas cylinder static evaporation rate detection device is provided, and according to the technical scheme disclosed by the device, the static evaporation rate detection device is connected with a temperature collector arranged at the inlet of a gas cylinder emptying valve pipeline, a pressure collector is arranged at the outlet of the gas cylinder emptying valve, and the temperature collector and the pressure collector are connected to an integrated tester through signal cables, so that the static evaporation rate of the gas cylinder is calculated.
In the static evaporation rate detection process, the evaporation amount of the gas cylinder under a certain saturation pressure is measured, and the evaporation rate is converted into a standard state evaporation rate, so that the gas-phase space pressure of the gas cylinder is always required to be maintained at a stable pressure, and the static evaporation rate detection device obviously cannot realize.
Disclosure of utility model
The utility model aims to overcome the defects and the shortcomings of the prior art, and provides a low-temperature heat-insulation gas cylinder static evaporation rate detection constant pressure device which can maintain the gas phase space pressure of a gas cylinder at a stable pressure and keep the flow of an outlet stable.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
The utility model provides a static evaporation rate detection constant pressure device of low temperature adiabatic gas cylinder, includes base, temperature sensor and pressure sensor, its characterized in that: the base on fixed mounting have stop valve and backpressure valve respectively, the entrance point of stop valve is connected with the joint that is connected with the atmospheric valve on the low temperature adiabatic gas cylinder through first inlet pipeline, the exit end of stop valve pass through the second inlet pipeline with the entrance point of backpressure valve is connected, temperature sensor and pressure sensor install respectively in the second inlet pipeline, the exit end of backpressure valve is connected with outlet pipeline.
Further, the joint is a four-way joint, and two ends of the four-way joint are respectively an inlet end connected with a vent valve on the low-temperature heat-insulating gas cylinder and an outlet end connected with the first inlet pipeline.
Further, the other two ends of the four-way joint are respectively and correspondingly provided with a vent valve and a safety valve.
Further, the temperature sensor and the pressure sensor are respectively and electrically connected with the static evaporation rate detector and are used for calculating the static evaporation rate of the low-temperature heat-insulating gas cylinder.
Further, the outlet pipe is connected with a flowmeter.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the back pressure valve is arranged, and after the pressure threshold value is exceeded, the back pressure valve is opened, gas in the low-temperature heat-insulating gas cylinder flows out, and after the heat balance is achieved, the back pressure valve is in a normally open state, so that the gas phase space pressure of the gas cylinder can be maintained at a stable pressure, and the flow of an outlet can be kept stable.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, a static evaporation rate detection constant pressure device of a low-temperature heat-insulating gas cylinder comprises a base 1, a temperature sensor 2 and a pressure sensor 3, wherein a stop valve 4 and a back pressure valve 5 are respectively and fixedly installed on the base 1, an inlet end of the stop valve 4 is connected with a joint 7 connected with a blow-off valve on the low-temperature heat-insulating gas cylinder through a first inlet pipeline 6, an outlet end of the stop valve 4 is connected with an inlet end of the back pressure valve 5 through a second inlet pipeline 8, the temperature sensor 2 and the pressure sensor 3 are respectively installed in the second inlet pipeline 8, and an outlet end of the back pressure valve 5 is connected with an outlet pipeline 9.
In the utility model, the joint 7 is a four-way joint, and two ends of the four-way joint 7 are respectively an inlet end connected with a blow-off valve on a low-temperature heat-insulating gas cylinder and an outlet end connected with a first inlet pipeline 6.
In the utility model, the other two ends of the four-way joint 7 are respectively provided with a vent valve 10 and a safety valve 11 correspondingly.
During the use, when not working or in emergency, through opening the relief valve 10, the gas in the discharge pipeline avoids unexpected to guarantee safe in utilization.
In addition, when the pressure in the pipeline exceeds the set pressure of the safety valve 11, the safety valve 11 automatically opens to release pressure, so that the pressure of the pipeline is ensured to be lower than the set pressure, and normal operation is ensured.
In the present utility model, the temperature sensor 2 and the pressure sensor 3 are electrically connected to a static evaporation rate detector (not shown) respectively, so as to calculate the static evaporation rate of the low-temperature adiabatic gas cylinder.
In the present utility model, the outlet pipe 9 is connected to a flow meter (not shown).
The utility model is further described below with reference to the accompanying drawings:
Before use, two ends of the four-way joint 7 are respectively and correspondingly connected with the emptying valve and the first inlet pipeline 6 on the low-temperature heat-insulating gas cylinder, the other two ends of the four-way joint 7 are respectively and correspondingly connected with the emptying valve 10 and the safety valve 11, the first inlet pipeline 6 is connected with the inlet end of the stop valve 4, the outlet end of the stop valve 4 is connected with the inlet end of the back pressure valve 5 through the second inlet pipeline 8, and the outlet end of the back pressure valve 5 is connected with the flowmeter through the outlet pipeline 9.
Then, the temperature sensor 2 and the pressure sensor 3 are connected to the static evaporation rate detector via signal lines, respectively.
When the device is used, the vent valve and the stop valve 4 on the low-temperature heat-insulating gas cylinder are opened, liquid phase can be vaporized along with the heat outside the gas cylinder into the gas cylinder, so that the pressure in the gas cylinder can be slowly increased, after the pressure in the pipeline exceeds the pressure threshold value of the back pressure valve 5, the back pressure valve 5 is opened, the gas in the low-temperature heat-insulating gas cylinder flows out, after the heat balance is achieved, the back pressure valve 5 is in a normally open state, the gas-phase space pressure of the gas cylinder can be maintained at a stable pressure, and the flow of an outlet can be kept stable.
The detection data of the temperature sensor 2, the pressure sensor 3 and the flowmeter are transmitted to a static evaporation rate detector, and the static evaporation rate of the low-temperature heat-insulating gas cylinder can be calculated by adopting the existing technical means.
Although the present disclosure describes embodiments, not every embodiment is described in terms of a single embodiment, and such description is for clarity only, and one skilled in the art will recognize that the embodiments described in the disclosure as a whole may be combined appropriately to form other embodiments that will be apparent to those skilled in the art.
Therefore, the above description is not intended to limit the scope of the application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (5)
1. The utility model provides a static evaporation rate detection constant pressure device of low temperature adiabatic gas cylinder, includes base, temperature sensor and pressure sensor, its characterized in that: the base on fixed mounting have stop valve and backpressure valve respectively, the entrance point of stop valve is connected with the joint that is connected with the atmospheric valve on the low temperature adiabatic gas cylinder through first inlet pipeline, the exit end of stop valve pass through the second inlet pipeline with the entrance point of backpressure valve is connected, temperature sensor and pressure sensor install respectively in the second inlet pipeline, the exit end of backpressure valve is connected with outlet pipeline.
2. The static evaporation rate detection constant pressure device for a low-temperature heat-insulating gas cylinder according to claim 1, wherein the device comprises the following components: the connector is a four-way connector, and two ends of the four-way connector are respectively an inlet end connected with an emptying valve on the low-temperature heat-insulating gas cylinder and an outlet end connected with the first inlet pipeline.
3. The static evaporation rate detection constant pressure device for a low-temperature heat-insulating gas cylinder according to claim 2, wherein the device is characterized in that: and the other two ends of the four-way joint are respectively and correspondingly provided with a vent valve and a safety valve.
4. The static evaporation rate detection constant pressure device for a low-temperature heat-insulating gas cylinder according to claim 1, wherein the device comprises the following components: the temperature sensor and the pressure sensor are respectively and electrically connected with the static evaporation rate detector and are used for calculating the static evaporation rate of the low-temperature heat-insulating gas cylinder.
5. The static evaporation rate detection constant pressure device for a low-temperature heat-insulating gas cylinder according to claim 1, wherein the device comprises the following components: the outlet pipeline is connected with the flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322604599.7U CN221076191U (en) | 2023-09-25 | 2023-09-25 | Static evaporation rate detection constant pressure device for low-temperature heat-insulating gas cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322604599.7U CN221076191U (en) | 2023-09-25 | 2023-09-25 | Static evaporation rate detection constant pressure device for low-temperature heat-insulating gas cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221076191U true CN221076191U (en) | 2024-06-04 |
Family
ID=91267606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322604599.7U Active CN221076191U (en) | 2023-09-25 | 2023-09-25 | Static evaporation rate detection constant pressure device for low-temperature heat-insulating gas cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221076191U (en) |
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2023
- 2023-09-25 CN CN202322604599.7U patent/CN221076191U/en active Active
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