CN110285320B - LNG gas pitcher atmospheric pressure test device for ore car - Google Patents
LNG gas pitcher atmospheric pressure test device for ore car Download PDFInfo
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- CN110285320B CN110285320B CN201910595836.3A CN201910595836A CN110285320B CN 110285320 B CN110285320 B CN 110285320B CN 201910595836 A CN201910595836 A CN 201910595836A CN 110285320 B CN110285320 B CN 110285320B
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- hole
- jackscrew
- fastening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to an LNG (liquefied natural gas) tank air pressure test device for an ore vehicle, which solves the problem that the conventional air pressure test device cannot be used on an LNG tank; the test pressing ventilation unit comprises an annular supporting seat, an air source pipeline, a ventilation jackscrew and a fastening jackscrew; the annular supporting seat is sleeved outside the flange, the ventilation jackscrew is axially provided with a gas channel, passes through a threaded hole of the annular supporting seat and then is inserted into a gas phase hole of the flange and is communicated with the gas phase hole, and the other end of the ventilation jackscrew is communicated with a gas source pipeline; the fastening jackscrew passes through the threaded hole on the corresponding annular supporting seat and then contacts with the outer surface of the flange; the in-tank data measuring unit comprises an accommodating cavity fixed at the end part of the joint edge, a liquid level meter extension signal wire and a pressure gauge; the accommodating cavity is communicated with the connecting edge liquid level sensor hole; the level gauge extends the signal line setting and is holding the intracavity, and the manometer is installed and is being held the chamber tip.
Description
Technical Field
The invention relates to a gas tank test device, in particular to an LNG gas tank pressure test device for an ore vehicle.
Background
Lng tanks may provide energy for various types of vehicles. One type of liquefied natural gas tank (hereinafter referred to as an LNG tank) is suitable for 350-ton ore trucks, the LNG tank provides LNG fuel for the ore trucks, the tank body is divided into an inner layer and an outer layer, an air pressure test needs to be performed on the inner tank body after the inner tank body is manufactured, and the LNG tank is completely different in structure compared with vehicle tank bodies of LNG tank cars, LNG containers and the like which are designed conventionally.
The conventional design of the tank body is shown in fig. 1, a plurality of conventional gas tank pipelines 18 are arranged at the positions of a conventional gas tank inner tank body 16 and a conventional gas tank outer tank body 17, during a gas pressure test, a connecting device such as a temporary flange 20 can be welded on a pipe orifice 19 of the conventional gas tank, the conventional gas tank can be connected with a gas source pipeline 12 and a pressure gauge 11, the gas pressure test can be completed, and after the test is completed, the connecting device is removed.
As shown in fig. 2, the LNG tank inner tank 13 and the LNG tank outer tank 14 are communicated by an LNG tank interlayer pipeline 15, a liquid phase hole, a gas phase hole, and a liquid level sensor hole, which are provided on the inner tank flange 1, the liquid phase hole is used for inputting and outputting liquid in the LNG tank, the gas phase hole is used for inputting and outputting gas in the LNG tank, and the liquid level sensor hole is used for installing a liquid level sensor in the LNG tank during use. The liquid phase hole, the gas phase hole and the channel where the liquid level sensor hole is located are mutually independent; all liquid and gas inlet and outlet are realized through different openings of the joint edge, and the pressure of the air pressure test is close to 2 Mpa; the joint edge is not provided with a pipeline, the liquid phase hole, the gas phase hole and the liquid level sensor hole are not provided with threads, and meanwhile, the joint edge is not allowed to be welded with a temporary device (if the temporary device is welded, the joint edge can be damaged when the temporary device is removed). Therefore, the conventional gas pressure test apparatus cannot be used for the LNG tank.
Disclosure of Invention
The invention aims to solve the problem that a conventional gas pressure test device cannot be used on an LNG tank due to the fact that a pipeline is not arranged on a flange of the LNG tank, a thread is not arranged at an opening of the LNG tank, and a temporary device is not welded on the flange, and provides the LNG tank gas pressure test device for the ore car.
In order to achieve the purpose, the technical solution of the invention is as follows:
the utility model provides an ore is LNG gas pitcher atmospheric pressure test device for car, its special character lies in: the test system comprises an in-tank data measuring unit and a test compaction ventilation unit;
the test pressing and ventilating unit comprises an annular supporting seat, an air source pipeline and a jackscrew;
the annular supporting seat is of an annular structure and is sleeved outside the flange of the LNG tank, and four threaded holes are uniformly distributed in the circumferential direction on the annular wall of the annular supporting seat;
the number of the jackscrews is four, and the four jackscrews correspond to the threaded holes one by one;
one or two of the jackscrews are ventilation jackscrews which are axially provided with gas channels, and one of the ventilation jackscrews passes through the threaded hole and then is inserted into the gas phase hole of the flange; one end of the gas channel is communicated with the gas phase hole, and the other end of the gas channel is communicated with the gas source pipeline;
the other jackscrews are fastening jackscrews which respectively pass through the corresponding threaded holes and then contact with the outer surface of the connecting edge;
the in-tank data measuring unit comprises an accommodating cavity, a liquid level meter extension signal wire and a pressure gauge;
one end of the accommodating cavity is fixed at the end part of the joint edge, and the accommodating cavity is communicated with the joint edge liquid level sensor hole;
the level gauge extends the signal line setting and is holding the intracavity, and the manometer is installed and is holding the chamber other end.
The ventilation plug is arranged between the ventilation jackscrew and the edge gas phase hole, is of a cylindrical structure, and is sequentially provided with a primary through hole, a secondary through hole and a tertiary threaded hole along the axial direction;
the ventilation jackscrew comprises a tail part, a middle part and a head part which are sequentially arranged along the axial direction;
the middle part comprises a first thread section, a clamping section and a second thread section which are arranged in sequence;
the outer diameter of the second thread section is larger than the outer diameter of the first thread section, the outer diameter of the clamping section is larger than the outer diameter of the tail part;
the first thread section is matched with the third thread hole;
the ventilation jackscrew is inserted on the ventilation top, the tail part penetrates through the first-stage through hole and then is matched with the joint edge gas phase hole, the first thread section is positioned in the second-stage through hole, and the clamping section is positioned in the third-stage thread hole.
Furthermore, the head of the ventilation jackscrew is a quadrangular square head or a hexagonal square head.
Further, a rubber pad is arranged at the position where the ventilating plug is in contact with the outer surface of the joint edge.
The fastening top head is of a cylindrical structure, the interior of the fastening top head is hollow, the fastening top head is provided with a step blind hole, and the small hole of the step blind hole is a thread;
the fastening jackscrew comprises a first thread section, a clamping section, a second thread section and a head part which are sequentially arranged along the axial direction;
the outer diameter of the second thread section is larger than the outer diameter of the first thread section and larger than the outer diameter of the clamping section;
the first thread section is matched with a thread hole on the fastening plug;
the fastening jackscrew is inserted on the fastening top, and the first screw thread section is located inside the fastening top, and the joint section is located the fastening top screw hole.
Furthermore, a through hole perpendicular to the axis of the fastening jackscrew is arranged on the head of the fastening jackscrew.
Furthermore, the head of the fastening jackscrew is a square head or a hexagonal head.
Further, a rubber pad is arranged at the position where the fastening plug is in contact with the outer surface of the flange.
The invention has the advantages that:
1. the in-tank data measuring unit and the test compressing and ventilating unit fix the test device on the connecting edge, so that the air pressure test of the LNG tank can be realized, and the research and development of the LNG tank are promoted; the problem that the existing air pressure test device and method cannot be used on the LNG tank is solved.
2. The tank level meter signal wire is placed in the containing cavity, and the channel communicated with the liquid level sensor hole, the liquid phase hole and the gas phase hole are mutually independent, so that the damage caused by high-speed airflow impact generated by the channel at the gas phase hole in the atmospheric pressure test of the level meter signal wire can be avoided.
3. Through the cooperation of fastening jackscrew and fastening plug, the jackscrew of ventilating and the plug of ventilating, when the rotatory and fixed annular supporting seat of fastening jackscrew or the jackscrew of ventilating, the plug can keep relative static with the flange, protects the flange surface at the in-process of fastening not by the fish tail, avoids leading to fatigue crack scheduling problem because of the mar that the fish tail formed.
4. The four directions of annular supporting seat inwards compress tightly the flange respectively, can guarantee to connect the leakproofness of the radial hole in the test time of flange, and the annular supporting seat adopts the material preparation of high strength, can avoid the device can not cause the inefficacy scheduling problem because of pressure is too big, has guaranteed atmospheric pressure test's security and reliability.
5. The rubber pads are arranged on the surfaces of the fastening plug and the ventilating plug, which are in contact with the joint edge, so that the surfaces of the joint edge are protected from being scratched in the fastening process of the test pressing and ventilating unit.
6. During the test, the rubber pad is added in the opening on the connecting edge, so that the sealing performance of the air pressure test can be improved.
7. The through hole on the fastening top head and the head part of the through hole are arranged in a quadrangular square head or a hexagonal square head, so that the fastening top thread can be conveniently screwed into the annular supporting seat; the head of the ventilating plug is a square head with four corners or a hexagonal head, so that the ventilating plug screw can be conveniently screwed into the annular supporting seat.
Drawings
FIG. 1 is a structural view of a conventional gas tank for a vehicle;
fig. 2 is a structural view of an LNG tank in the present invention;
FIG. 3 is a schematic diagram of an apparatus test using the present invention;
FIG. 4 is a front view of a test compression vent unit;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a block diagram of a fastening jack;
FIG. 7 is a cross-sectional view of the fastening plug;
FIG. 8 is a cross-sectional view of a vent plug;
figure 9 is a cross-sectional view of a venting plug.
The reference numbers are as follows:
1-flange, 2-test compression ventilation unit, 3-in-tank data measurement unit, 4-annular supporting seat, 5-fastening jackscrew, 6-fastening jackscrew, 7-ventilation jackscrew, 8-ventilation jackscrew, 9-containing cavity, 10-liquid level meter extension signal line, 11-pressure gauge, 12-gas source pipeline, 13-LNG tank inner tank body, 14-LNG tank outer tank body, 15-LNG tank interlayer pipeline, 16-conventional tank inner tank body, 17-conventional tank outer tank body, 18-conventional tank pipeline, 19-conventional tank orifice and 20-temporary flange.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
as shown in fig. 3 to 9, the LNG tank pressure test apparatus for a mineral car includes a tank data measurement unit 3 and a test compression ventilation unit 2;
as shown in fig. 4 and 5, the test compression ventilation unit 2 comprises an annular support base 4, a fastening jackscrew 5, a fastening plug 6, a ventilation jackscrew 7, a ventilation plug 8 and an air source pipeline 12;
the annular supporting seat 4 is of an annular structure and is sleeved outside the flange 1 of the LNG tank, and four threaded holes are uniformly distributed in the circumferential direction on the annular wall of the annular supporting seat 4;
as shown in fig. 7, the fastening plug 6 is a cylindrical structure, the interior of the fastening plug is hollow, and a threaded hole is formed in one side surface of the fastening plug 6;
as shown in fig. 6, the fastening jackscrew 5 comprises a first thread section, a clamping section, a second thread section and a head section which are sequentially arranged along the axial direction;
the head of the fastening jackscrew 5 is provided with a through hole vertical to the axis of the fastening jackscrew 5, the head of the fastening jackscrew 5 is a square head with four corners, and the square head with four corners and the through hole can be used as the torsional part of the fastening jackscrew 5.
The first thread section is matched with a thread hole on the fastening plug 6;
the outer diameter of a second threaded section of the fastening jackscrew 5 is larger than that of a first threaded section, and the outer diameter of the first threaded section is larger than that of the clamping section;
during assembly, the fastening jackscrews 5 respectively penetrate through corresponding threaded holes on the annular supporting seat 4, the first threaded sections of the fastening jackscrews 5 are screwed into the threaded holes on the fastening jacks 6, the first threaded sections of the fastening jackscrews 5 are positioned inside, and the clamping sections are positioned at the threaded holes of the fastening jacks 6;
As shown in fig. 9, the venting plug 8 is a cylindrical structure, and the venting plug 8 is provided with a first-stage through hole, a second-stage through hole and a third-stage threaded hole in sequence along the axial direction;
as shown in fig. 8, the ventilation jackscrew 7 is provided with a gas channel penetrating through two ends of the ventilation jackscrew along the axial direction, and the end of the ventilation jackscrew 7 is communicated with the gas phase hole of the flange 1; the other end of the ventilation jackscrew 7 is connected with an air source pipeline 12; the ventilation jackscrew 7 can play the roles of compressing, inflating and deflating.
The ventilation jackscrew 7 comprises a tail part, a middle part and a head part which are sequentially arranged along the axial direction; the head of the ventilation jackscrew 7 is arranged as a square head with four corners, and the square head with four corners can be used as a part for the ventilation jackscrew 7 to apply force and twist.
The middle part comprises a first thread section, a clamping section and a second thread section which are arranged in sequence;
the first thread section is matched with the third thread hole;
the outer diameter of the second threaded section is larger than that of the first threaded section, the outer diameter of the first threaded section is larger than that of the clamping section, and the outer diameter of the clamping section is larger than that of the tail part;
during assembly, the ventilation jackscrews 7 respectively penetrate through corresponding threaded holes in the annular supporting seat 4, the first threaded section of the ventilation jackscrew 7 is screwed into the threaded hole in the ventilation jacking head 8, the tail part of the ventilation jackscrew 7 penetrates through the primary through hole, the first threaded section is positioned in the secondary through hole, and the clamping section is positioned in the tertiary threaded hole;
in the process of rotating and jacking the ventilation jackscrew 7, the first thread section rotates in the ventilation top 8, the second thread section rotates and drives the ventilation top 8 to move towards the surface of the flange 1, the ventilation top 8 can keep relative static with the surface of the flange 1, the function of protecting the surface of the opening of the flange 1 is achieved, and the surface of the flange 1 is prevented from being scratched; after the assembly is finished, the tail part of the ventilation jackscrew 7 is inserted into the gas phase hole of the flange 1, and a gas channel of the ventilation jackscrew 7 is communicated with the gas phase hole of the flange 1, so that the air inflation and deflation in the tank body air pressure test process can be realized; the rubber pad on the outer surface of the ventilation plug 8 is contacted with the outer surface of the flange 1.
As shown in fig. 4, three fastening screws 5 and three fastening plugs 6 are provided, and one ventilation screw 7 and one ventilation plug 8 are provided, and are respectively inserted into corresponding threaded holes of the fastening screws and assembled, so that the annular support base 4 is sleeved outside the flange 1 of the LNG tank.
The test compressing and ventilating unit 2 compresses the joint edge 1 in four directions respectively, so that the pressures borne by the joint edge 1 are balanced.
As shown in fig. 3, the in-tank data measuring unit 3 includes a containing chamber 9, a level gauge extension signal line 10, and a pressure gauge 11;
the accommodating cavity 9 is fixed at the end part of the flange 1, and the accommodating cavity 9 is communicated with the liquid level sensor hole of the flange 1;
a liquid level meter extension signal wire 10 is arranged in the containing cavity 9, and a pressure gauge 11 is arranged at the end part of the containing cavity 9.
The manometer 11 also can be through changing one of them fastening jackscrew 5 for ventilating behind the jackscrew 7, connect at the jackscrew 7 tip of ventilating, ventilate jackscrew 7 and flange liquid phase hole intercommunication to realize the detection of pressure.
The LNG tank for the ore vehicle adopts the device to perform the air pressure test method, and comprises the following steps:
the extending signal wire 10 of the liquid level meter is placed in the accommodating cavity 9, so that the extending signal wire 10 of the liquid level meter is protected from the impact of air flow in the air charging and discharging processes during the air pressure test; two pressure gauges 11 are arranged at the end of the containing cavity 9 to measure the pressure in the tank during the air pressure test; mounting the accommodating cavity 9 to the end of the flange 1, and communicating the accommodating cavity 9 with the liquid level sensor hole of the flange 1;
installing a fastening jackscrew 5, a fastening plug 6, a ventilation jackscrew 7 and a ventilation jackscrew 8 on an annular supporting seat 4, sleeving the annular supporting seat 4 on the flange 1, adding a rubber pad in a gas phase hole on the flange 1, and aligning the tail part of the ventilation jackscrew 7 with the gas phase hole of the flange 1 for hole forming;
the annular supporting seat 4 is fixed on the flange 1 by rotating the fastening jackscrew 5 and the ventilation jackscrew 7; at the moment, the tail part of the ventilation jackscrew 7 is communicated with the gas phase hole of the flange 1; the head of the ventilation jackscrew 7 is connected with an air source pipeline 12;
and (4) performing a pressurization test, discharging gas in the tank through the ventilation jackscrew 7 after the test is finished, and detaching the test compression ventilation unit 2 and the in-tank data measurement unit 3.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. The utility model provides an ore is LNG gas pitcher atmospheric pressure test device for car which characterized in that: comprises an in-tank data measuring unit (3) and a test compacting and ventilating unit (2);
the test pressing and ventilating unit (2) comprises an annular supporting seat (4), an air source pipeline (12) and a jackscrew;
the annular supporting seat (4) is of an annular structure and is sleeved outside the flange (1) of the LNG tank, and four threaded holes are uniformly distributed in the circumferential direction on the annular wall of the annular supporting seat (4);
the number of the jackscrews is four, and the four jackscrews correspond to the threaded holes one by one;
one or two of the jackscrews are ventilation jackscrews (7) which are axially provided with gas channels, and one ventilation jackscrew (7) passes through the threaded hole and then is inserted into the gas phase hole of the flange (1); one end of the gas channel is communicated with the gas phase hole, and the other end of the gas channel is communicated with the gas source pipeline (12);
a ventilation plug (8) is arranged between the ventilation jackscrew (7) and the gas phase hole of the joint edge (1), the ventilation plug (8) is of a cylindrical structure, and a primary through hole, a secondary through hole and a tertiary threaded hole are sequentially formed in the ventilation plug (8) along the axial direction;
the ventilation jackscrew (7) comprises a tail part, a middle part and a head part which are sequentially arranged along the axial direction;
the middle part comprises a first thread section, a clamping section and a second thread section which are arranged in sequence;
the outer diameter of the second thread section is larger than the outer diameter of the first thread section, the outer diameter of the clamping section is larger than the outer diameter of the tail part;
the first thread section is matched with the third thread hole;
the ventilation jackscrew (7) is inserted on the ventilation jackscrew (8), the tail part penetrates through the primary through hole and then is matched with the gas phase hole of the flange (1), the first thread section is positioned in the secondary through hole, and the clamping section is positioned in the tertiary thread hole;
the other jackscrews are fastening jackscrews (5), and the fastening jackscrews (5) respectively pass through the corresponding threaded holes and then are contacted with the outer surface of the flange (1);
a fastening top head (6) is arranged between the fastening top thread (5) and the outer surface of the joint edge (1), the fastening top head (6) is of a cylindrical structure, the fastening top head (6) is provided with a step blind hole, and the small hole of the step blind hole is a threaded hole;
the fastening jackscrew (5) comprises a first thread section, a clamping section, a second thread section and a head part which are sequentially arranged along the axial direction;
the outer diameter of the second thread section is larger than the outer diameter of the first thread section and larger than the outer diameter of the clamping section;
the first thread section is matched with a thread hole on the fastening plug (6);
the fastening jackscrew (5) is inserted on the fastening plug (6), the first thread section is positioned in the fastening plug (6), and the clamping section is positioned in the thread hole of the fastening plug (6);
the in-tank data measuring unit (3) comprises an accommodating cavity (9), a liquid level meter extension signal wire (10) and a pressure gauge (11);
one end of the accommodating cavity (9) is fixed at the end part of the joint edge (1), and the accommodating cavity (9) is communicated with the liquid level sensor hole of the joint edge (1);
the level gauge extends the signal line (10) and sets up in holding chamber (9), and manometer (11) are installed and are held the chamber (9) other end.
2. The LNG tank pressure test device for the ore car according to claim 1, wherein: the head of the ventilation jackscrew (7) is a square head with four corners or a hexagonal head with six corners.
3. The LNG tank pressure test device for the ore car according to claim 2, wherein: and a rubber pad is arranged at the position where the ventilating plug (8) is contacted with the outer surface of the joint edge (1).
4. The LNG tank pressure test apparatus for the ore car according to any one of claims 1 to 3, wherein: the head of the fastening jackscrew (5) is provided with a through hole vertical to the axis of the fastening jackscrew (5).
5. The LNG tank pressure test device for the ore car according to claim 4, wherein: the head of the fastening jackscrew (5) is a square head with four corners or a hexagonal square head.
6. The LNG tank pressure test device for the ore car according to claim 5, wherein: and a rubber pad is arranged at the contact position of the fastening plug (6) and the outer surface of the joint edge (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910595836.3A CN110285320B (en) | 2019-07-03 | 2019-07-03 | LNG gas pitcher atmospheric pressure test device for ore car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910595836.3A CN110285320B (en) | 2019-07-03 | 2019-07-03 | LNG gas pitcher atmospheric pressure test device for ore car |
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| CN110285320A CN110285320A (en) | 2019-09-27 |
| CN110285320B true CN110285320B (en) | 2021-06-04 |
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| CN102705507A (en) * | 2012-06-14 | 2012-10-03 | 珠海格力电器股份有限公司 | Sealing device for pressure resistance test of pressure vessel |
| CN203298885U (en) * | 2013-05-14 | 2013-11-20 | 上海维萨仪表制造有限公司 | Temperature-measurement and pressure-measurement data acquisition head |
| CN103499484A (en) * | 2013-09-18 | 2014-01-08 | 中材科技（苏州）有限公司 | Pressure testing seal fixture of automobile LNG (Liquefied Natural Gas) cylinder |
| CN103575365A (en) * | 2013-11-08 | 2014-02-12 | 北京亿华通科技有限公司 | Liquidometer and vehicle-mounted LNG gas bottle |
| CN204479415U (en) * | 2015-02-23 | 2015-07-15 | 山东优力重工装备有限公司 | Vehicular liquefied natural gas bottle pressure experimental device |
| CN105782716A (en) * | 2016-03-20 | 2016-07-20 | 北京绿能高科天然气应用技术研究院有限公司 | Liquid density measurement method applied to LNG storage tank |
| CN206479294U (en) * | 2017-01-10 | 2017-09-08 | 徐工集团工程机械有限公司 | A kind of sealing property testing system of engineering machinery reductor |
| DE102017208537A1 (en) * | 2017-05-19 | 2018-11-22 | Bayerische Motoren Werke Aktiengesellschaft | Pressure vessel with datalogger |
| CN206818275U (en) * | 2017-06-19 | 2017-12-29 | 张家港中集圣达因低温装备有限公司 | Low-temperature (low temperature) vessel and the pressure obtaning device for low-temperature (low temperature) vessel level gauging |
| CN208222070U (en) * | 2018-03-28 | 2018-12-11 | 新兴能源装备股份有限公司 | LNG pressure liquid level emasuring device |
| CN109237193A (en) * | 2018-10-24 | 2019-01-18 | 海洋石油工程（青岛）有限公司 | The no-welding expanding blocking device of pressure test of snap ring-type |
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