CN220957332U - Double-layer air-capacitance type zero-leakage metal expansion joint - Google Patents
Double-layer air-capacitance type zero-leakage metal expansion joint Download PDFInfo
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- CN220957332U CN220957332U CN202322472063.4U CN202322472063U CN220957332U CN 220957332 U CN220957332 U CN 220957332U CN 202322472063 U CN202322472063 U CN 202322472063U CN 220957332 U CN220957332 U CN 220957332U
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- expansion joint
- connecting plate
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- metal expansion
- flow guiding
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- 239000002184 metal Substances 0.000 title claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 238000004891 communication Methods 0.000 claims abstract description 5
- 230000001502 supplementing effect Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 8
- 239000010410 layer Substances 0.000 description 27
- 239000007789 gas Substances 0.000 description 26
- 239000000463 material Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- Examining Or Testing Airtightness (AREA)
Abstract
The utility model discloses a double-layer air-tolerant zero-leakage metal expansion joint, which comprises an outer shell and an inner shell, wherein the outer shell and the inner shell are connected between an inlet connecting plate and an outlet connecting plate, a sealing cavity is formed between the outer shell and the inner shell, a communication pipeline is formed inside the inner shell, a control valve for communicating the cavity is arranged on the inlet connecting plate and/or the outlet connecting plate and is used for filling sealing gas, and a medium inlet and a medium outlet of the communication pipeline are respectively arranged on the inlet connecting plate and the outlet connecting plate. The utility model utilizes the double-layer sealing and positive pressure sealing wind effect, so that the internal medium can not directly leak outside when the expansion joint is damaged, the service life and the safety of the expansion joint are effectively improved, and simultaneously, whether the expansion joint is damaged can be timely detected in the service period. The pressure of sealing gas can be used for preventing leakage of internal medium for micro leakage.
Description
Technical Field
The utility model relates to the technical field of expansion joint sealing, in particular to a double-layer gas-capacitance type zero-leakage metal expansion joint.
Background
The expansion joint is a flexible structure arranged on a container shell or a pipeline for compensating additional stress caused by temperature difference and mechanical vibration, and has the advantages of reliable operation, good performance, compact structure and the like because the expansion joint is used as an elastic compensation element capable of freely stretching and contracting, and the expansion joint is widely applied to the fields of chemical industry, metallurgy, nuclear energy and the like.
However, the current metal expansion joint often has a leakage phenomenon, and the main reason for the leakage is that long-term reciprocating operation causes metal, and internal media leak outwards through gaps. Aiming at the practical situation that the existing expansion joint is easy to leak, the utility model provides a double-layer air-capacitance type zero-leakage metal expansion joint.
Disclosure of Invention
The utility model aims to: aiming at the problem that the existing expansion joint is easy to leak and low in safety, the utility model provides the double-layer gas-capacitance type zero-leakage metal expansion joint, which effectively eliminates the leakage phenomenon caused by abrasion of the metal expansion joint by utilizing the double-layer sealing and positive pressure sealing wind effect and has the advantages of simple structure, reasonable design, stable and reliable performance, high degree of automation, wide adaptability and the like.
The utility model comprises the following steps: in order to achieve the above purpose, the utility model provides a double-layer gas-tolerant zero-leakage metal expansion joint, which comprises an outer shell and an inner shell, wherein the outer shell and the inner shell are connected between an inlet connecting plate and an outlet connecting plate, a sealing cavity is formed between the outer shell and the inner shell, a circulation pipeline is formed inside the inner shell, a control valve communicated with the cavity is arranged on the inlet connecting plate and/or the outlet connecting plate and is used for filling sealing gas, and a medium inlet and a medium outlet of the communication pipeline are respectively arranged on the inlet connecting plate and the outlet connecting plate.
Furthermore, the outer shell is of a flexible structure, metal or nonmetal can be selected according to actual use conditions, certain flexibility is required, and expansion displacement of the expansion joint is not affected; the inner shell is a metal expansion joint, and the material of the inner shell can be plain carbon steel or stainless steel.
Further, the inlet connecting plate and the outlet connecting plate are movably connected through a connecting rod, and the equipment plays a role in fixing during transportation.
Further, the guide structure is arranged in the pipeline, so that an auxiliary guide effect can be achieved on the medium, and meanwhile, the effect of preventing the medium from wearing the inner metal expansion joint is achieved.
Further, the guide structure comprises an inner guide plate and an outer guide plate, wherein the inner guide plate and the outer guide plate are respectively connected with the inlet connecting plate and the outlet connecting plate, a radial gap is arranged between the inner guide plate and the outer guide plate, namely, a sufficient expansion gap is reserved, and the inner guide plate extends to the inner side of the outer guide plate to form a relative sliding structure.
Further, a flexible heat insulation material can be filled between the inner shell and the flow guiding structure, so that heat exchange between an internal medium and the outside is prevented.
Further, a sealing gas supplementing device (including a gas source, a gas pipe, a gas pump and the like) is also included, which is communicated with the control valve and is used for filling sealing gas.
Further, a sealing gas detection device (such as a pressure sensor) is also included for detecting the change of the gas pressure in the cavity.
Further, the device also comprises a control system (such as a controller, a computer and the like), wherein the control system is respectively connected with the detection device and the control valve in a signal manner, and whether leakage occurs or not and sealing gas is supplemented are determined by detecting the change of the air pressure in the cavity.
Further, the leakage detection device also comprises an alarm device (such as a signal lamp), wherein the alarm device is in signal connection with the control system, and a prompt can be sent through the alarm device when the leakage is judged.
The beneficial effects are that:
In the conventional design structure, the single-layer metal expansion joint is connected with the inlet connecting plate and the outlet connecting plate, when the connecting plates at the two ends are subjected to external force to generate displacement in different directions, the single-layer metal expansion joint can generate extrusion deformation to absorb expansion amounts in different directions, and the material is tired and damaged due to repeated twisting, so that internal media leak.
The utility model utilizes the double-layer sealing and positive pressure sealing wind effect, so that the internal medium can not directly leak outside when the expansion joint is damaged, the service life and the safety of the expansion joint are effectively improved, and simultaneously, whether the expansion joint is damaged can be timely detected in the service period. The pressure of sealing gas can be used for preventing leakage of internal medium for micro leakage.
The utility model has the advantages of simple structure, reasonable design, stable and reliable performance, high degree of automation, wide adaptability and the like, can realize the purpose of zero leakage of the expansion joint by utilizing the self materials and the structural characteristics, and can be widely applied to transmission pipelines such as air, flue gas, combustible explosive toxic gas and the like.
Drawings
FIG. 1 is a schematic structural diagram of a double-layer air-capacitance type zero-leakage metal expansion joint in an embodiment of the utility model;
FIG. 2 is a cross-sectional view of a double-layer air-tolerant zero-leakage metal expansion joint in an embodiment of the utility model;
FIG. 3 is an exploded view of a double-layer gas-capacitance type zero-leakage metal expansion joint in an embodiment of the utility model;
The drawings include: the device comprises a 1-inlet and outlet control valve, a 2-inlet connecting plate, a 3-outer shell, a 4-inner shell, a 5-inner guide plate, a 6-outer guide plate, a 7-connecting rod, an 8-outlet connecting plate and a 9-sealing gas supplementing device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model.
As shown in fig. 1 to 3, the double-layer air-capacitance type zero-leakage metal expansion joint provided by the embodiment comprises an outer layer shell 3 and an inner layer shell 4 which are connected between an inlet connecting plate 2 and an outlet connecting plate 8, wherein a sealing cavity is formed between the outer layer shell 3 and the inner layer shell 4, a flow pipeline is formed inside the inner layer shell 4, inlet and outlet control valves 1 for two communicating cavities are arranged on the inlet connecting plate 2, and medium inlets and medium outlets for the communicating pipelines are respectively arranged on the inlet connecting plate 2 and the outlet connecting plate 8.
Furthermore, the outer shell can be made of metal or nonmetal according to actual use conditions, and certain flexibility is required, so that the expansion displacement of the expansion joint is not influenced; the inner shell 4 is a metal expansion joint, and the material can be plain carbon steel or stainless steel. The deformation expansion amount of the double-layer expansion joint is mainly realized through the deformation of the inner metal expansion joint.
Further, the inlet connecting plate 2 and the outlet connecting plate 8 are both in frame-type structures, four vertex angles of the inlet connecting plate are respectively and movably connected through the connecting rods 7, and the fixing effect is achieved during equipment transportation.
Further, a diversion structure can be arranged in the inner pipeline of the inner shell 4, so that an auxiliary diversion effect can be achieved on the medium, and meanwhile, the effect of preventing the medium from wearing the inner metal expansion joint can be achieved.
In this embodiment, the flow guiding structure includes an inner layer flow guiding plate 5 and an outer layer flow guiding plate 6, wherein the inner layer flow guiding plate 5 is connected with the inlet connection plate 2, the outer layer flow guiding plate 6 is connected with the outlet connection plate 8, a sufficient expansion gap is reserved between the inner layer flow guiding plate 5 and the outer layer flow guiding plate 6, and the inner layer flow guiding plate 5 extends to the inner side of the outer layer flow guiding plate 6 to form a relative sliding structure.
Further, a flexible heat insulation material can be filled between the inner shell 4 and the guide plate, so that heat exchange between the internal medium and the outside is prevented.
Further, the embodiment also comprises a sealing gas supplementing device 9, a pressure sensor, a computer and an alarm device, wherein when the gas supplementing is needed, the sealing gas supplementing device 9 (comprising a gas source, a gas pipe, a gas pump and the like) is communicated with a control valve, and the sealing gas is filled by the control valve; the computer can detect the pressure change in the cavity in real time through the pressure sensor, thereby determining whether leakage occurs and supplementing sealing gas, and when judging that leakage occurs, the computer can send a prompt through the alarm device.
According to the utility model, the outer layer shell is additionally arranged outside the metal expansion joint, and then sealing gas is introduced into the interlayer, so that the equipment is ensured to be free from leakage. The outer shell and the inner expansion joint are respectively and fixedly connected with the inlet connecting plate and the outlet connecting plate, so that the tightness is ensured, and the inlet and outlet control valve is used for adjusting and closing sealing gas; the two layers of guide plates are respectively connected with the inlet connecting plate and the outlet connecting plate and are independently connected, so that the medium is prevented from directly flushing the expansion joint under the condition that the guide plates slide relatively.
On one hand, the utility model can perform online operation, the control system detects the pressure of the sealing gas filled in the gas container in real time, and when the pressure is reduced, the computer can quantitatively control the supplementary sealing gas in real time and simultaneously perform alarm prompt; on the other hand, off-line operation can be performed, constant pressure sealing gas can be filled for stable operation equipment, and whether leakage exists or not is determined by periodically observing the sealing gas pressure off-line.
The above detailed description is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Various modifications, substitutions and improvements of the technical scheme of the present utility model will be apparent to those skilled in the art from the description and drawings provided herein without departing from the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a double-deck gas appearance formula zero leakage metal expansion joint, its characterized in that, including connecting outer casing and the inlayer casing between import connecting plate and export connecting plate, wherein form sealed cavity between outer casing and the inlayer casing, and the inside circulation pipeline that forms of inlayer casing, be equipped with the control valve of intercommunication cavity on import connecting plate and/or the export connecting plate for fill sealing gas, and be equipped with the medium entry and the medium export of communication pipeline on import connecting plate and the export connecting plate respectively.
2. The double-layer air-tolerant zero-leakage metal expansion joint according to claim 1, wherein the outer shell is of a flexible structure, and the inner shell is of a metal expansion joint.
3. The double-layer air-tolerant zero-leakage metal expansion joint according to claim 1, wherein the inlet connecting plate and the outlet connecting plate are movably connected through a connecting rod.
4. The double-layer air-capacitance type zero-leakage metal expansion joint according to claim 1, wherein a flow guiding structure is arranged in the pipeline.
5. The double-layer air-tolerant zero-leakage metal expansion joint according to claim 4, wherein the flow guiding structure comprises an inner flow guiding plate and an outer flow guiding plate, wherein the inner flow guiding plate and the outer flow guiding plate are respectively connected with the inlet connecting plate and the outlet connecting plate, a radial gap is arranged between the inner flow guiding plate and the outer flow guiding plate, and the inner flow guiding plate extends to the inner side of the outer flow guiding plate.
6. The double-layer air-tolerant zero-leakage metal expansion joint according to claim 4, wherein a flexible heat insulation material is filled between the inner shell and the flow guiding structure.
7. The double-layer gas-tolerant zero-leakage metal expansion joint according to claim 1, further comprising a sealing gas supplementing means in communication with the control valve for charging the sealing gas.
8. The double-layer air-tolerant zero-leakage metal expansion joint according to claim 1, further comprising a sealing gas detecting device for detecting a change in air pressure in the cavity.
9. The double-layer air-capacitance type zero-leakage metal expansion joint according to claim 8, further comprising a control system, wherein the control system is respectively connected with the detection device and the control valve in a signal manner.
10. The double-layer air-tolerant zero-leakage metal expansion joint according to claim 9, further comprising an alarm device, wherein the alarm device is in signal connection with a control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322472063.4U CN220957332U (en) | 2023-09-12 | 2023-09-12 | Double-layer air-capacitance type zero-leakage metal expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322472063.4U CN220957332U (en) | 2023-09-12 | 2023-09-12 | Double-layer air-capacitance type zero-leakage metal expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220957332U true CN220957332U (en) | 2024-05-14 |
Family
ID=91011570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322472063.4U Active CN220957332U (en) | 2023-09-12 | 2023-09-12 | Double-layer air-capacitance type zero-leakage metal expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220957332U (en) |
-
2023
- 2023-09-12 CN CN202322472063.4U patent/CN220957332U/en active Active
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