CN114382983A - Negative pressure pipeline working medium protector and negative pressure pipeline working medium protection assembly - Google Patents
Negative pressure pipeline working medium protector and negative pressure pipeline working medium protection assembly Download PDFInfo
- Publication number
- CN114382983A CN114382983A CN202011131711.4A CN202011131711A CN114382983A CN 114382983 A CN114382983 A CN 114382983A CN 202011131711 A CN202011131711 A CN 202011131711A CN 114382983 A CN114382983 A CN 114382983A
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- pipeline
- end cover
- working medium
- working
- negative pressure
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- 230000001012 protector Effects 0.000 title claims abstract description 42
- 238000007789 sealing Methods 0.000 claims description 20
- 239000012530 fluid Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 description 36
- 239000001307 helium Substances 0.000 description 6
- 229910052734 helium Inorganic materials 0.000 description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000006837 decompression Effects 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/406—Sealings between relatively-moving surfaces by means of fluid by at least one pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/12—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side weight-loaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
- F16L41/021—T- or cross-pieces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
A negative pressure pipeline working medium protector comprises a protection cavity, a pressure relief fixing block, a guide rod and a connecting valve; the protection cavity comprises an upper end cover, a lower end cover and a cavity body with openings at two ends, the upper end cover and the lower end cover are respectively arranged at two ends of the cavity body, the upper end cover is provided with an air hole, and the lower end cover is provided with a mounting hole; the pressure relief fixing block is arranged on one side, far away from the cavity, of the upper end cover, the pressure relief fixing block is fixed on the upper end cover through a guide rod, and the air hole is sealed by the pressure relief fixing block; the connecting valve is communicated with the protection cavity. The negative pressure pipeline working medium protector seals the protection cavity by arranging the positions needing protection, such as threaded connection or flange connection, of the working pipeline in the protection cavity, and gas which is the same as gas working medium in the working pipeline is introduced into the protection cavity. And when the pressure is negative, the atmosphere can be reduced from entering the working pipeline. When overpressure occurs, the pressure relief fixing block can move towards the direction far away from the protection cavity along the guide rod, so that gas is leaked out, and the working pipeline and the protector are protected from overpressure.
Description
Technical Field
The invention relates to the technical field of processing equipment, in particular to a negative pressure pipeline working medium protector and a negative pressure pipeline working medium protection assembly.
Background
In the gas conveying process, some pipeline connecting positions are connected through threads or flanges, so that the convenience of pipeline dismounting is guaranteed, the convenience of dismounting and replacing of some safety parts, detection parts, control parts and the like is guaranteed, and leakage at the thread and flange connecting positions cannot be avoided after the equipment runs for a long time in the connecting mode. When the pressure in the pipe is higher than the external atmospheric pressure, the gas in the pipeline leaks outwards, so that the waste of the gas and even the environmental pollution are caused; when the pressure of the fluid in the pipeline is lower than the external atmospheric pressure of the pipeline in the flowing process, the atmosphere leaks into the pipeline to pollute the gas in the pipeline. The leakage affects the operation condition of the equipment, causes the performance reduction of the equipment, even damages the equipment and increases the operation cost of the equipment.
In a super-flow helium refrigeration system, a low-pressure side pipeline for partially conveying helium gas needs to operate under negative pressure to meet the refrigeration requirement of the system. Because the requirement of the equipment on the leakage rate is extremely high, and the volume of the gas expands when the gas returns to the normal temperature from the low temperature, the overpressure of the pipeline is caused, and in order to avoid human misoperation and ensure the safety of the equipment system, a safety protection device and a pressure monitoring device need to be arranged on the pipeline. And the leakage is difficult to avoid due to the structural limitation of part of the safety protection devices. Due to the existence of the low-temperature movable parts, the super-flow helium refrigeration system does not allow external atmosphere to enter the system, so that collision and erosion of parts caused by condensation of water vapor at low temperature are prevented.
Disclosure of Invention
In view of this, it is necessary to provide a working medium protector for a negative pressure pipeline, which can reduce the risk of pollution to the working medium in the pipeline caused by the external atmosphere entering the negative pressure pipeline through the position with poor gas sealing performance, such as pipeline threaded connection or flange connection, thereby avoiding the influence of reduced equipment performance caused by the atmosphere leaking into the pipeline.
A negative pressure pipeline working medium protector comprises a protection cavity, a pressure relief fixing block, a guide rod and a connecting valve;
the protection cavity comprises an upper end cover, a lower end cover and a cavity body with openings at two ends, the upper end cover and the lower end cover are respectively arranged at two ends of the cavity body, the upper end cover is provided with an air hole, and the lower end cover is provided with a mounting hole;
the pressure relief fixing block is arranged on one side, far away from the cavity, of the upper end cover, is fixed on the upper end cover through the guide rod, and seals the air hole;
the connecting valve is communicated with the protection cavity.
In one embodiment, the number of the guide rods is two, and the two guide rods are oppositely arranged on two sides of the pressure relief fixing block.
In one embodiment, a first sealing ring is arranged between the pressure relief fixing block and the upper end cover.
In one embodiment, the number of the connection valves is two, and the two connection valves are respectively communicated with the protection cavity.
A negative pressure pipeline working medium protection assembly comprises a connecting fixing seat, a connecting piece and the negative pressure pipeline working medium protector;
the connecting fixing seat is mounted at the mounting hole, the connecting fixing seat is connected with the lower end cover through a screw, the connecting fixing seat is provided with a fluid flow channel, the fluid flow channel is used for being communicated with a working pipeline, and the connecting fixing seat is in leak-free connection with the working pipeline;
the connecting piece with the circulation runner passes through threaded connection or flange joint, the connecting piece with the junction of circulation runner is located in the protection cavity.
In one embodiment, a second sealing ring is arranged between the connecting fixed seat and the lower end cover.
In one embodiment, the non-leakage connection between the connection holder and the working pipeline means that the connection holder and the working pipeline are welded, or
The connecting fixing seat and the working pipeline are integrally formed.
A negative pressure pipeline working medium protection assembly comprises a KF flange, a connecting fixing seat, a connecting piece and the negative pressure pipeline working medium protector;
the KF flange is welded on the connecting fixing seat, one end of the KF flange is used for being welded with a working pipeline, the connecting fixing seat is provided with a fluid flow channel, and the fluid flow channel is communicated with the working pipeline;
the KF flange is arranged at the mounting hole, and the lower end cover is welded with the other end of the KF flange;
the connecting piece with the circulation runner passes through threaded connection or flange joint, the connecting piece with the junction of circulation runner is located the protection chamber with in the space that the KF flange formed.
Above-mentioned negative pressure pipeline working medium protector, the position that needs protection such as threaded connection or flange joint through with the working pipeline is arranged in the protection intracavity and is sealed, the protection chamber lets in the gas the same with the gaseous working medium in the working pipeline through the connecting valve, when the working pipeline inner stroke is when negative pressure operating condition, even leak, also the protection intracavity gas gets into to the working pipeline in, because gaseous working medium is the same with the gas in the protection intracavity in the working pipeline, therefore, can reduce during the position that the gaseous sealing performance is poor such as threaded connection or flange joint that external atmosphere passes through the working pipeline gets into the working pipeline, reduce the risk that the working medium led to the fact the pollution in the working pipeline, thereby avoid the influence that equipment performance reduces. When the stroke in the working pipeline is over-pressurized, the gas in the working pipeline leaks into the protection cavity, the gas pressure in the protection cavity is increased, and therefore the pressure relief fixing block moves towards the direction far away from the protection cavity along the guide rod, the gas is enabled to leak out, and the fact that the overpressure of the protector is caused when the gas in the working pipeline is over-pressurized is guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of a negative pressure pipeline working medium protector according to an embodiment;
fig. 2 is a schematic structural diagram of a negative pressure pipeline working medium protection assembly in another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be understood that the relation indicating the orientation or position such as "above" is based on the orientation or position relation shown in the drawings, or the orientation or position relation which the product of the present invention is usually put into use, or the orientation or position relation which is usually understood by those skilled in the art, and is only for convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1, the negative pressure pipeline working medium protector of an embodiment includes a protection cavity, a pressure relief fixing block 11, a guide rod 12, and a connection valve.
The protection cavity comprises an upper end cover 142, a lower end cover 146 and a cavity 144 with two open ends, the upper end cover 142 and the lower end cover 146 are respectively arranged at two ends of the cavity 144, the upper end cover 142 is provided with an air hole 141, and the lower end cover 146 is provided with a mounting hole 143.
The decompression fixed block 11 is arranged on one side of the upper end cover 142 far away from the cavity 144, the decompression fixed block 11 is fixed on the upper end cover 142 through the guide rod 12, and the decompression fixed block 11 seals the air hole 141.
The connecting valve is communicated with the protection cavity.
Above-mentioned negative pressure pipeline working medium protector, the position that needs protection such as threaded connection or flange joint through with working pipeline 19 is arranged in the protection intracavity and is sealed, the protection chamber lets in the gas the same with the gaseous working medium in the working pipeline 19 through the connecting valve, when working pipeline 19 inner stroke is when negative pressure operating condition, even take place to leak, also the gaseous entering to working pipeline 19 in the protection intracavity, because gaseous working medium is the same with the gas in the protection intracavity in the working pipeline 19, therefore, can reduce during the position that external atmosphere passes through the gaseous sealing performance such as threaded connection or flange joint of working pipeline 19 gets into working pipeline 19, reduce the risk that causes the pollution to working pipeline 19 interior working medium, thereby avoid the influence that equipment performance reduces. When the stroke in the working pipeline 19 is over-pressurized, the gas in the working pipeline 19 leaks into the protection cavity, the gas pressure in the protection cavity is increased, and therefore the pressure relief fixing block 11 moves towards the direction far away from the protection cavity along the guide rod 12, the gas is enabled to leak out, and the overpressure of the protector is avoided when the gas in the working pipeline 19 is over-pressurized.
Above-mentioned negative pressure pipeline working medium protector, simple structure, convenient operation can be connected through the connection fixing base that sets up on screw and the working line 19, and the installation of being convenient for is dismantled, can not cause the influence to the fluidic flow in the working line 19, has avoided welding process to the influence of connecting piece sealing performance.
Above-mentioned negative pressure pipeline working medium protector seals the protection chamber through the pressure release fixed block 11 that adopts guide bar 12 restriction stroke scope, and this pressure release fixed block 11 can be based on the withstand voltage requirement of working line 19, chooses for use the pressure that is slightly less than working line 19 design pressure to calculate the quality of pressure release fixed block 11. The negative pressure pipeline working medium protector can be filled with a proper amount of gas which is the same as the working medium in the working pipeline 19, the overpressure of a closed protection cavity can be avoided, and overpressure self-protection of the negative pressure pipeline working medium protector and overpressure protection of outward leakage of the gas in the working pipeline 19 are realized. The device plays a role in safety protection for the negative pressure pipeline working medium protector and the system.
In one embodiment, the number of the guide rods 12 is two, and the two guide rods 12 are oppositely arranged on two sides of the fixed pressure relief block 11.
The pressure relief fixed block 11 selects corresponding mass according to the pressure resistance requirement of the working pipeline 9. The pressure relief fixing block 11 seals the protection cavity by means of self weight, and the protection cavity can be filled with protective atmosphere. The guide rod 12 can be used for limiting the stroke of the pressure relief fixing block 11, preventing the pressure relief fixing block 11 from being separated due to the impact of airflow and ensuring the safe operation of the working medium protector of the negative pressure pipeline.
The guide rods 12 are oppositely arranged, so that the pressure relief fixing block 11 can move more stably.
In one embodiment, a first sealing ring 13 is arranged between the fixed decompression block 11 and the upper end cover 142.
The pressure relief fixing block 11 compresses the first sealing ring 13 by means of self weight, and sealing of the protection cavity is guaranteed. In a specific embodiment, a proper pressure relief fixing block 11 can be selected according to the pressure resistance requirement of the working pipeline 19, so that overpressure self-protection of the protector and overpressure protection of gas leakage of the working pipeline 19 are realized.
In one embodiment, the number of the connecting valves is two, and the two connecting valves are respectively communicated with the protection cavity. Both connecting valves are ball valves. One of which is an inlet ball valve 162 and the other of which is an outlet ball valve 164. The upper end cap 142, the lower end cap 146 and the connecting valve are fixed together with the cavity by welding. The connecting valve is used for gas replacement and measurement in the protective cavity. Further, the two connecting valves are oppositely arranged.
Specifically, the negative pressure pipeline working medium protector can replace and supplement gas in the protection cavity through ball valves on two sides of the cavity. In addition, a pressure sensor can be arranged to monitor the pressure of the protection cavity, the protector can be monitored and adjusted in real time, and meanwhile the sealing performance of the position needing to be protected is verified.
After the negative pressure pipeline working medium protector is installed, the outlet ball valve 164 is connected to a vacuum pump. The inlet ball valve 162 on the protector cavity is closed and the outlet ball valve 164 is opened. The protection cavity is vacuumized by a vacuum pump to reach an ideal vacuum state, and the outlet ball valve 164 is closed. The inlet ball valve 162 is connected with the air source with the same working medium in the working pipeline 19, the air supply work is carried out on the protection cavity through the inlet ball valve 162, and the pressure in the protection cavity is measured. And repeatedly evacuating and supplementing air for 3-5 times, and then inflating the protection cavity to a proper pressure to ensure the micro positive pressure of the gas in the protection cavity. In this case, it is possible to ensure that the same gas as the working line 19 is present in the protection chamber, and to avoid overpressure protection of the protector itself.
Referring to fig. 1, an embodiment of a negative pressure pipeline working medium protection assembly is provided, which includes a connection fixing seat 17, a connection member 15 and the negative pressure pipeline working medium protector.
The connecting fixing seat 17 is installed at the installation hole 143, the connecting fixing seat 17 is connected with the lower end cover 146 through the screw 18, the connecting fixing seat 17 is provided with a fluid flow passage, the fluid flow passage is used for being communicated with the working pipeline 19, and the connecting fixing seat 17 is connected with the working pipeline 19 in a leakage-free mode.
The connecting piece 15 is connected with the circulation flow channel through threads or flanges, and the connecting part of the connecting piece 15 and the circulation flow channel is arranged in the protective cavity.
In one embodiment, a second sealing ring 145 is disposed between the connection holder 17 and the lower end cap 146. By providing the second seal ring 145, the sealing performance of the protection chamber can be improved.
In one embodiment, the non-leakage connection between the connection fixing seat 17 and the working pipeline 19 means that the connection fixing seat 17 and the working pipeline 19 are welded together, or the connection fixing seat 17 and the working pipeline 19 are integrally formed.
The use method of the working medium protection assembly of the negative pressure pipeline comprises the following steps:
at the position where the working pipeline 19 needs to be protected, the connecting piece fixing seat 17 is welded on the working pipeline 19 through welding, then the connecting piece 15 is installed, and the connecting piece 15 is covered by the protection cavity of the protector. The lower end cover 146 is sealed with the connector fixing seat 17 by the first sealing ring 13 and fixed by screws or other methods. And a proper pressure relief fixing block 11 is installed according to the pressure requirement of the working pipeline 19, so that the pressure relief fixing block is pressed tightly with the upper end cover 142 by means of the gravity of the pressure relief fixing block, the first sealing ring 13 is pressed tightly and sealed, and the sealing property of the protection cavity is ensured. Meanwhile, the guide rod 12 is used for limiting the moving direction and the stroke of the pressure relief fixing block 11, and the safety of the pressure relief fixing block is guaranteed. The connecting valves on the two sides of the protector are used for vacuumizing and replacing the same gas in the working pipeline 19, and finally the gas in the protective cavity is ensured to have proper pressure. Meanwhile, whether gas is required to be supplemented into the protection cavity or not can be judged according to the gas pressure inside the protector during the operation of the equipment, so that the normal operation of the equipment is ensured.
The following is a specific example.
The fluid in the working pipeline 19 is helium, the pressure is 8000Pa and is lower than the atmospheric pressure, and the pressure of the working pipeline 19 is 0.2 MPa. The connecting fixing seat 17 is welded on a branch of the working pipeline 19, and the outer diameter of the working pipeline 19 is 21.7 mm. Due to the structural features of the working line 19 itself and the flexible connections in the connections of the working line 19, gas leaks may occur at the connection points. The outer diameter of the protector is 114mm, and the height of the protector is 76 mm. After the working medium protection component of the negative pressure pipeline is installed and fixed, a pressure relief fixing block 11 with the thickness of 20mm is selected for installation and fixation. Helium is connected with ball valves on two sides of the protection cavity for gas supplement, and the pressure of the supplemented helium is 0.06MPa, namely the micro-positive pressure of the gas in the protection cavity is ensured. Before the working medium protection assembly of the negative pressure pipeline is arranged on the working pipeline 19, the working medium protection assembly of the negative pressure pipeline is tested, and the working medium protection assembly of the negative pressure pipeline is found to have good sealing performance and vacuum leak rate of 1.9 multiplied by 10-10Pa·m3And/s, when the gas pressure is 0.12MPa, the decompression fixed block 11 does not jump, and has good sealing effect. When the pressure rises to 0.16MPa, the pressure relief fixing blockThe first seal ring 13 is separated from the first seal ring 11, and pressure is released. In the process of carrying out an equipment test, the working medium protection assembly of the negative pressure protection pipeline runs well.
Referring to fig. 2, a working medium protection assembly for a negative pressure pipeline according to another embodiment is further provided, which includes a KF flange 28, a connecting fixing seat 27, a connecting piece 25, and the working medium protector for a negative pressure pipeline.
Connect fixing base 27 and KF flange 28 welded connection, the one end of KF flange 28 be used for with working line 29 welded connection, connect fixing base 27 and be equipped with fluid flow channel, fluid flow channel and working line 29 intercommunication.
The connecting piece 25 is connected with the circulating flow channel through threads or flanges, and the connecting part of the connecting piece 25 and the circulating flow channel is arranged in a space formed by the protection cavity and the KF flange 28.
Specifically, the negative pressure pipeline working medium protector comprises a protection cavity, a pressure relief fixing block 21, a guide rod 22 and a connecting valve. The protection chamber includes an upper end cap 242, a lower end cap 246, and a chamber 244 open at both ends. Further, a first sealing ring 23 is arranged between the pressure relief fixing block 21 and the upper end cover 242. Further, an inlet ball valve 262 and an outlet ball valve 264 are disposed at both sides of the protection chamber.
The working medium protection assembly of the negative pressure pipeline shown in figure 2 is more suitable for protecting a small-size working pipeline.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A negative pressure pipeline working medium protector is characterized by comprising a protection cavity, a pressure relief fixing block, a guide rod and a connecting valve;
the protection cavity comprises an upper end cover, a lower end cover and a cavity body with openings at two ends, the upper end cover and the lower end cover are respectively arranged at two ends of the cavity body, the upper end cover is provided with an air hole, and the lower end cover is provided with a mounting hole;
the pressure relief fixing block is arranged on one side, far away from the cavity, of the upper end cover, is fixed on the upper end cover through the guide rod, and seals the air hole;
the connecting valve is communicated with the protection cavity.
2. The negative-pressure pipeline working medium protector as claimed in claim 1, wherein the number of the guide rods is two, and the two guide rods are oppositely arranged on two sides of the pressure relief fixing block.
3. The negative-pressure pipeline working medium protector as claimed in claim 1, wherein a first sealing ring is arranged between the pressure relief fixing block and the upper end cover.
4. The negative-pressure pipeline working medium protector as claimed in claim 1, wherein the number of the connection valves is two, and the two connection valves are respectively communicated with the protection cavity.
5. A negative pressure pipeline working medium protection assembly is characterized by comprising a connecting fixing seat, a connecting piece and a negative pressure pipeline working medium protector according to any one of claims 1 to 4;
the connecting fixing seat is mounted at the mounting hole, the connecting fixing seat is connected with the lower end cover through a screw, the connecting fixing seat is provided with a fluid flow channel, the fluid flow channel is used for being communicated with a working pipeline, and the connecting fixing seat is in leak-free connection with the working pipeline;
the connecting piece with the circulation runner passes through threaded connection or flange joint, the connecting piece with the junction of circulation runner is located in the protection cavity.
6. The working medium protection assembly for the negative pressure pipeline as claimed in claim 5, wherein a second sealing ring is arranged between the connecting fixing seat and the lower end cover.
7. The working medium protection assembly for a negative pressure pipeline according to claim 5, wherein the non-leakage connection between the connection holder and the working pipeline is a welded connection between the connection holder and the working pipeline, or
The connecting fixing seat and the working pipeline are integrally formed.
8. A negative pressure pipeline working medium protection assembly is characterized by comprising a KF flange, a connecting fixed seat, a connecting piece and a negative pressure pipeline working medium protector according to any one of claims 1 to 4;
the KF flange is welded on the connecting fixing seat, one end of the KF flange is used for being welded with a working pipeline, the connecting fixing seat is provided with a fluid flow channel, and the fluid flow channel is communicated with the working pipeline;
the KF flange is arranged at the mounting hole, and the lower end cover is welded with the other end of the KF flange;
the connecting piece with the circulation runner passes through threaded connection or flange joint, the connecting piece with the junction of circulation runner is located the protection chamber with in the space that the KF flange formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011131711.4A CN114382983A (en) | 2020-10-21 | 2020-10-21 | Negative pressure pipeline working medium protector and negative pressure pipeline working medium protection assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011131711.4A CN114382983A (en) | 2020-10-21 | 2020-10-21 | Negative pressure pipeline working medium protector and negative pressure pipeline working medium protection assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114382983A true CN114382983A (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011131711.4A Pending CN114382983A (en) | 2020-10-21 | 2020-10-21 | Negative pressure pipeline working medium protector and negative pressure pipeline working medium protection assembly |
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| CN (1) | CN114382983A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114857797A (en) * | 2022-05-07 | 2022-08-05 | 中国科学院理化技术研究所 | Negative pressure protection module for super-flow helium refrigerator |
| CN114923291A (en) * | 2022-05-07 | 2022-08-19 | 中国科学院理化技术研究所 | Overflow helium refrigerator with negative pressure protection module |
-
2020
- 2020-10-21 CN CN202011131711.4A patent/CN114382983A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114857797A (en) * | 2022-05-07 | 2022-08-05 | 中国科学院理化技术研究所 | Negative pressure protection module for super-flow helium refrigerator |
| CN114923291A (en) * | 2022-05-07 | 2022-08-19 | 中国科学院理化技术研究所 | Overflow helium refrigerator with negative pressure protection module |
| CN114857797B (en) * | 2022-05-07 | 2023-02-10 | 中国科学院理化技术研究所 | Negative pressure protection module for super-flow helium refrigerator |
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