CN112393111A - Bottleneck seal structure and high-pressure composite container - Google Patents
Bottleneck seal structure and high-pressure composite container Download PDFInfo
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- CN112393111A CN112393111A CN202011444545.3A CN202011444545A CN112393111A CN 112393111 A CN112393111 A CN 112393111A CN 202011444545 A CN202011444545 A CN 202011444545A CN 112393111 A CN112393111 A CN 112393111A
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- metal
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- support
- bottle mouth
- plastic shell
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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
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/061—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with positioning means
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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
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/005—Storage of gas or gaseous mixture at high pressure and at high density condition, e.g. in the single state phase
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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
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
- F17C1/04—Protecting sheathings
- F17C1/06—Protecting sheathings built-up from wound-on bands or filamentary material, e.g. wires
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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
- F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
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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
- F17C13/04—Arrangement or mounting of valves
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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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/058—Size portable (<30 l)
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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
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0626—Multiple walls
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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
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/066—Plastics
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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
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/0663—Synthetics in form of fibers or filaments
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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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
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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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
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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
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0165—Applications for fluid transport or storage on the road
- F17C2270/0184—Fuel cells
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a bottle mouth sealing structure and a high-pressure composite container, wherein the sealing structure comprises a metal joint and a metal end head; wherein, the metal joint is provided with a step which is used for being pressed on the bottle mouth of the plastic shell; the metal end is provided with a mounting groove, the mounting groove is compressed on the step, and the mounting groove is connected with the bottle opening in a sealing mode. According to the bottle mouth sealing structure and the high-pressure composite container, the metal end head is matched with the metal joint, so that the outer side face, the inner side face and the upper end face of the bottle mouth are completely wrapped and sealed, and high-pressure gas is effectively prevented from leaking; meanwhile, the bottle mouth is completely coated by the metal joint and the metal end, so that the diameter of the bottle mouth can be prevented from changing under the action of temperature and pressure, and the bottle mouth has excellent high-low pressure resistance and temperature alternation resistance.
Description
Technical Field
The invention relates to a high-pressure composite container, in particular to a bottle mouth sealing structure and a high-pressure composite container.
Background
Most taxis are modified with Compressed Natural Gas (CNG) to replace fuel oil, and the working pressure of a common CNG high-pressure gas cylinder is 20 MPa; some vehicle production manufacturers have promoted vehicles that use CNG or CNG mixed with fuel. The automobile adopting the hydrogen medium battery is also the current hotspot, the working pressure of the hydrogen storage high-pressure gas cylinder is generally 35MPa and 70MPa, and an IV-shaped cylinder (a high-pressure plastic inner container composite container) with 70MPa is the current heating point. In addition to vehicles, high-pressure gas cylinders are also fully applied in other fields, for example, a plastic liner composite container (working pressure 2MPa) is adopted for part of liquefied petroleum gas in Europe. A large number of high-pressure containers are widely used in daily life, and the traditional pure metal or metal lining composite container has the problem of heavy weight and is difficult to transport; and the higher the storage pressure is, the more complicated the production process of the metal plastic liner is, the higher the cost is, and the risk of being corroded by high-pressure gas also exists. In order to meet the requirement of light weight, a high-pressure plastic liner composite container is produced, and due to the characteristics of plastics, the product has excellent performances of corrosion resistance, fatigue resistance, light weight and the like. Compared with a pure metal or metal lining composite container, the tightness of the high-pressure plastic liner composite container is guaranteed more rigorously, and the main reason is that the plastic liner shell and the metal end are made of different materials, so that the connection between the plastic liner and the metal end is loosened in the repeated use process, and the sealing performance is reduced.
In view of the current situation, the connection between the metal end and the plastic inner container is a hot point and a difficult point for research. Fig. 1 is a schematic view of a high-pressure plastic liner composite container in the prior art, which includes a metal end 1, a plastic liner 2 and a fiber composite material layer 3, wherein the metal end 1 is installed on the plastic liner 2, and then is formed by winding and wrapping the fiber composite material layer 3. Fig. 2 is a view showing a sealing structure in the high pressure plastic liner composite container shown in fig. 1, and as shown in fig. 1 and 2, the large-area contact of the metal end 1 with the plastic liner 2 is technically impossible and expensive even if feasible; the sealing structure does not consider the limit on the axes of the metal end 1 and the plastic inner container 2; the structure does not consider the pressurization that the internal pressure of the plastic inner container 2 changes continuously when winding, which can cause the joint of the metal end 1 and the plastic inner container 2 to generate a gap to cause leakage, as shown by a leakage path 4 shown by an arrow in figure 2; the structure does not consider the limit of the bottle mouth when bearing the installation torque, and the bonding strength of the metal end 1 and the fiber composite material layer 3 is reduced after the installation; the escape path P of the compressed gas in the structure is short, so that the risk of escape of the compressed gas can be increased, and particularly, the compressed gas is small molecular gas CNG, hydrogen, helium and the like. Therefore, it is necessary to develop a sealing structure capable of solving the above problems.
Disclosure of Invention
The invention aims to provide a bottle mouth sealing structure and a high-pressure composite container, which are used for solving the problem of poor sealing property between a metal end head and a plastic shell in the prior art, so that the high-pressure composite container has excellent sealing property and excellent high-low pressure resistance and temperature alternation resistance.
The invention provides a bottle mouth sealing structure, which comprises:
the metal connector is provided with a step, and the step is used for being tightly pressed on a bottle mouth of the plastic shell;
the metal end is provided with an installation groove, the installation groove is tightly pressed on the step, and the installation groove is hermetically connected with the bottle opening.
The spout sealing structure as described above, wherein preferably the step forms a sealing portion to an end of the metal fitting, the sealing portion occupying 1/3 of the total length of the metal fitting.
The bottle mouth sealing structure as described above, wherein, preferably, the mounting groove is screwed with the side wall of the bottle mouth.
The bottle mouth sealing structure as described above, preferably, further includes a metal support, the metal support is fixedly embedded in the sidewall of the bottle mouth, and both sides of the bottle mouth in the axial direction are respectively pressed by the step and the metal support;
the metal support is in threaded connection with the mounting groove.
The bottle mouth sealing structure as described above, preferably, the metal support includes a first support and a second support which are symmetrically arranged, the first support and the second support are both semi-circular ring structures, and the first support and the second support are fixedly embedded on the bottle mouth to form a complete circular ring.
The bottle mouth sealing structure as described above, wherein preferably, a first sealing surface is provided on the metal end, and an obtuse angle is formed between the first sealing surface and the bottom surface of the metal end.
The invention also provides a high-pressure composite container, wherein the high-pressure composite container comprises the bottle mouth sealing structure provided by the invention, and the high-pressure composite container also comprises:
a bottle opening is formed in the plastic shell, one end of the metal connector extends into the bottle opening, the step is tightly pressed on the bottle opening, and the metal end is connected with the side wall of the bottle opening in a sealing mode;
the bottleneck valve is connected with the metal joint;
the fiber winding reinforcing layer is fixedly wrapped on the surfaces of the plastic shell and the metal end.
The high-pressure composite container as described above, preferably, the bottle mouth includes a support section and a flange, the support section extends in the axial direction of the plastic casing, one end of the support section is connected to the plastic casing, the other end of the support section is connected to the flange, an installation space is formed between the flange and the plastic casing, and the metal support in the bottle mouth sealing structure is fixedly embedded in the installation space.
The high-pressure composite container preferably further comprises a sealing ring, wherein a sealing groove is formed in the inner wall of the support section, and the sealing ring is fixedly embedded in the sealing groove.
The high-pressure composite container as described above, wherein preferably, a second sealing surface is provided on the plastic casing, the second sealing surface is inclined toward the center of the plastic casing, and the second sealing surface is in sealing engagement with the first sealing surface.
According to the bottle mouth sealing structure and the high-pressure composite container, the step on the metal joint is tightly pressed on the upper end face of the bottle mouth, so that the inner side face and the upper end face of the bottle mouth can be sealed through the metal joint; meanwhile, the metal end can be tightly pressed on the step through the mounting groove, so that the step is tightly pressed on the bottle opening, and the metal end can be connected with the outer side surface of the bottle opening in a sealing manner; therefore, the complete coating and sealing of the outer side surface, the inner side surface and the upper end surface of the bottle mouth are realized through the matching of the metal end head and the metal joint, and the leakage of high-pressure gas is effectively prevented; meanwhile, the bottle mouth is completely coated by the metal joint and the metal end, so that the diameter of the bottle mouth can be prevented from changing under the action of temperature and pressure, and the bottle mouth has excellent high-low pressure resistance and temperature alternation resistance.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic view of a high pressure plastic liner composite container in the prior art;
FIG. 2 is a sealing structure of the high pressure plastic liner composite container shown in FIG. 1;
FIG. 3 is a schematic structural diagram of a bottle mouth sealing structure provided in an embodiment of the present invention;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is a view showing the state where the metal fitting is fitted to the bottle mouth;
fig. 6 is a state diagram of the application of the bottle mouth sealing structure provided by the embodiment of the invention in the high-pressure composite container.
Description of reference numerals:
1-metal end 2-plastic inner container 3-fiber composite material layer
4-leakage path
100-metal joint 110-step 200-metal end
210-first sealing face 300-metal support 310-first support
320-second support 400-plastic housing 410-bottle mouth
411-support section 412-flanging 413-installation space
420-second sealing surface 430-gasket 440-gasket
500-fiber winding reinforced layer 600-bottle mouth valve
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
Referring to fig. 3 to 6, an embodiment of the present invention provides a bottle mouth sealing structure, which includes a metal joint 100 and a metal end 200; wherein, the metal joint 100 is provided with a step 110, and the step 110 is used for being pressed on the bottle mouth 410 of the plastic shell 400; the metal end 200 is provided with a mounting groove, the mounting groove is compressed on the step 110, and the mounting groove is hermetically connected with the bottle mouth 410.
The bottle mouth 410 protrudes out of the plastic shell 400, one end of the metal connector 100 close to the step 110 can extend into the bottle mouth 410, the outer side face of the metal connector 100 can be connected with the inner surface of the bottle mouth 410 in a sealing mode, and the step 110 can be pressed on the upper end face of the bottle mouth 410, so that the inner side face and the upper end face of the bottle mouth 410 can be sealed through the metal connector 100; when the metal end 200 is installed, the metal end 200 can be tightly pressed on the step 110 through the installation groove, so that the step 110 is tightly pressed on the bottle opening 410, and the metal end 200 can be connected with the outer side surface of the bottle opening 410 in a sealing manner; therefore, through the matching of the metal end 200 and the metal joint 100, the complete coating and sealing of the outer side surface, the inner side surface and the upper end surface of the bottleneck 410 are realized, and the leakage of high-pressure gas is effectively prevented; meanwhile, the bottle mouth 410 is completely coated by the metal joint 100 and the metal end 200, so that the diameter of the bottle mouth 410 can be prevented from changing under the action of temperature and pressure, and the bottle mouth has excellent high and low pressure resistance and temperature alternation resistance.
The outer side surface of the metal joint 100 is connected with the inner wall of the bottle opening 410 in a sealing mode through the sealing ring 430, and the bottle opening 410 is completely coated by the metal joint 100 and the metal end 200, so that the diameter of the bottle opening 410 can be prevented from changing under the action of temperature and pressure, the stability of the compression amount of the sealing ring 430 is guaranteed, and the sealing performance between the plastic shell 400 and the metal joint 100 is further guaranteed.
Note that, the step 110 forms a seal portion to one end of the metal joint 100, and the seal portion occupies 1/3 of the total length of the metal joint 100. The seal may protrude into the mouth 410 and sealingly connect with an interior wall surface of the mouth 410. The part of the residual 2/3 on the metal joint 100 can be in close contact with the metal end 200 and the fiber winding reinforcing layer 500, so that a large contact area is ensured, the structural reliability of the metal joint 100 after connection can be improved, the reliability of connection with the bottle opening 410 is ensured, and gaps are avoided.
Further, the mounting groove may be screw-coupled with the sidewall of the bottle mouth 410. That is, when the mouth 410 is molded with the plastic case 400, an external thread may be directly molded on an outer sidewall of the mouth 410, so that the metal tip 200 may be screw-coupled through the external thread.
However, since the plastic thread of the plastic shell 400 has low strength and it is difficult to form the flange 412 on the bottle mouth 410, the fatigue resistance of the container is relatively poor, and the pressure performance requirement of the high-pressure composite container is difficult to meet, and only the performance requirement of the low-pressure container can be met.
For this reason, in this embodiment, the bottle mouth sealing structure may further include a metal support 300, the metal support 300 is fixedly embedded in a side wall of the bottle mouth 410, and both sides of the bottle mouth 410 in the axial direction are respectively pressed by the step 110 and the metal support 300.
As shown in fig. 4 and 5, an installation space 413 is formed between the flange 412 and the root of the bottle mouth 410, and the metal support 300 can be fixedly embedded in the installation space 413, so that the metal support 300 and the step 110 can be respectively pressed on two sides of the flange 412, and the flange 412 can be limited by the metal support 300, the metal connector 100 and the metal end 200, and under the condition that the internal pressure and temperature of the container repeatedly change, the bottle mouth 410 can still be separated from the metal connector 100 and the metal end 200 without causing seal failure or attenuation, so that the bottle mouth sealing structure with the metal support 300 has strong multiple pressure resistance and temperature change capability.
Wherein the metal supporter 300 is screw-coupled with the mounting groove. It is understood that the outer side of the metal support 300 may be provided with a screw thread, and after the metal support 300 is fixedly embedded in the installation space 413, the metal end 200 may be fixedly connected with the metal support 300 through the outer screw thread of the metal support 300, so that the metal end 200 can be tightly connected with the plastic shell 400 and the bottle opening 410.
Further, as shown in fig. 3, in order to facilitate the fixed connection between the metal support 300 and the mouth 410, the metal support 300 may include a first support 310 and a second support 320 that are symmetrically disposed, both the first support 310 and the second support 320 are semi-circular ring structures, and the first support 310 and the second support 320 are fixedly embedded on the mouth 410 to form a complete circular ring.
It will be appreciated that the first support 310 and the second support 320 are provided with threads on their outer sides, and that the threads on the first support 310 and the second support 320 may be connected as a continuous complete thread to mate with the metal end 200 when the first support 310 and the second support 320 are engaged.
Further, as shown in fig. 4, the metal tip 200 may be provided with a first sealing surface 210, and the first sealing surface 210 forms an obtuse angle with the bottom surface of the metal tip 200.
It is understood that, in order to cooperate with the first sealing surface 210 on the metal end 200, the plastic housing 400 may be provided with a second sealing surface 420, and the second sealing surface 420 is an inclined surface cooperating with the first sealing surface 210, since the plastic housing 400 is usually a solid of revolution, the second sealing surface 420 may make the end of the plastic housing 400 in a bowl shape, i.e., make the end of the plastic housing 400 concave inwards, so that the cooperating interface formed by the first sealing surface 210 and the second sealing surface 420 may make the gas molecules receive resistance at the interface to flow upwards, thereby preventing the gas molecules from overflowing, and simultaneously prolonging the gas leakage path, and further preventing the gas from leaking.
Further, the embodiment of the present invention further provides a high-pressure composite container, which includes the bottleneck sealing structure provided in any embodiment of the present invention, and the high-pressure composite container further includes a plastic shell 400, a bottleneck valve 600, and a fiber winding reinforcing layer 500; wherein, a bottle mouth 410 is arranged on the plastic shell 400, one end of the metal joint 100 extends into the bottle mouth 410, the step 110 is pressed on the bottle mouth 410, and the metal end 200 is connected with the side wall of the bottle mouth 410 in a sealing way; the bottleneck valve 600 is connected with the metal joint 100; the fiber-wound reinforcing layer 500 is fixedly wrapped on the surfaces of the plastic shell 400 and the metal end 200.
The bottle mouth 410 protrudes out of the plastic shell 400, one end of the metal connector 100 close to the step 110 can extend into the bottle mouth 410, the outer side face of the metal connector 100 can be connected with the inner surface of the bottle mouth 410 in a sealing mode, and the step 110 can be pressed on the upper end face of the bottle mouth 410, so that the inner side face and the upper end face of the bottle mouth 410 can be sealed through the metal connector 100; when the metal end 200 is installed, the metal end 200 can be tightly pressed on the step 110 through the installation groove, so that the step 110 is tightly pressed on the bottle opening 410, and the metal end 200 can be connected with the outer side surface of the bottle opening 410 in a sealing manner; therefore, through the matching of the metal end 200 and the metal joint 100, the complete coating and sealing of the outer side surface, the inner side surface and the upper end surface of the bottleneck 410 are realized, and the leakage of high-pressure gas is effectively prevented; meanwhile, the bottle mouth 410 is completely coated by the metal joint 100 and the metal end 200, so that the diameter of the bottle mouth 410 can be prevented from changing under the action of temperature and pressure, and the bottle mouth has excellent high and low pressure resistance and temperature alternation resistance.
Specifically, as shown in fig. 4 and 5, the mouth 410 includes a support section 411 and a flange 412, the support section 411 extends in the axial direction of the plastic housing 400, one end of the support section 411 is connected to the plastic housing 400, the other end of the support section 411 is connected to the flange 412, a mounting space 413 is formed between the flange 412 and the plastic housing 400, and the metal support 300 in the mouth sealing structure is fixedly embedded in the mounting space 413. Therefore, the metal support 300 and the step 110 can be respectively pressed on two sides of the flanging 412, so that the flanging 412 can be limited by the metal support 300, the metal connector 100 and the metal end 200, and the bottle mouth 410 can still not be separated from the metal connector 100 and the metal end 200 under the condition of repeated changes of the internal pressure and temperature of the container, and the sealing failure or attenuation can not be caused, so that the bottle mouth sealing structure with the metal support 300 has stronger multiple pressure resistance and temperature change capability.
Further, as shown in fig. 6, the high-pressure composite container further includes a sealing ring 430, a sealing groove is formed on an inner wall of the support section 411, and the sealing ring 430 is fixedly embedded in the sealing groove, so that the sealing performance of the metal connector 100 and the bottle mouth 410 can be ensured.
As shown in fig. 6, a mounting hole is formed in the metal connector 100, and the mouthpiece valve 600 is fitted with the mounting hole, so as to seal the entire container, and in order to ensure the sealing effect of the mouthpiece valve 600 fitted with the mounting hole, a sealing ring 440 may be disposed on the inner wall of the mounting hole, so as to achieve radial sealing between the mouthpiece valve 600 and the mounting hole.
It will be appreciated that a second sealing surface 420 may be provided on the plastic housing 400, the second sealing surface 420 being inclined toward the center of the plastic housing 400, and the second sealing surface 420 being in sealing engagement with the first sealing surface 210. Since the plastic housing 400 is generally a solid of revolution, the second sealing surface 420 can make the end of the plastic housing 400 in a bowl shape, i.e., make the end of the plastic housing 400 concave inward, so that the mating interface formed by the first sealing surface 210 and the second sealing surface 420 can make the gas molecules receive resistance at the interface to prevent the gas molecules from flowing upward, thereby preventing the gas molecules from overflowing, and simultaneously prolonging the leakage path of the gas, and further preventing the gas from leaking.
According to the bottleneck sealing structure and the high-pressure composite container provided by the embodiment of the invention, the step on the metal joint is tightly pressed on the upper end surface of the bottleneck, so that the inner side surface and the upper end surface of the bottleneck can be sealed through the metal joint; meanwhile, the metal end can be tightly pressed on the step through the mounting groove, so that the step is tightly pressed on the bottle opening, and the metal end can be connected with the outer side surface of the bottle opening in a sealing manner; therefore, the complete coating and sealing of the outer side surface, the inner side surface and the upper end surface of the bottle mouth are realized through the matching of the metal end head and the metal joint, and the leakage of high-pressure gas is effectively prevented; meanwhile, the bottle mouth is completely coated by the metal joint and the metal end, so that the diameter of the bottle mouth can be prevented from changing under the action of temperature and pressure, and the bottle mouth has excellent high-low pressure resistance and temperature alternation resistance.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (10)
1. A finish seal structure, comprising:
the metal connector is provided with a step, and the step is used for being tightly pressed on a bottle mouth of the plastic shell;
the metal end is provided with an installation groove, the installation groove is tightly pressed on the step, and the installation groove is hermetically connected with the bottle opening.
2. The finish seal structure of claim 1, wherein the step forms a seal to an end of the metal fitting, the seal comprising 1/3 the total length of the metal fitting.
3. The finish seal structure of claim 1, wherein the mounting groove is threadedly coupled to a sidewall of the finish.
4. The bottle mouth sealing structure according to claim 1, further comprising a metal support fixedly embedded in a side wall of the bottle mouth, wherein two sides of the bottle mouth in the axial direction are respectively pressed by the step and the metal support;
the metal support is in threaded connection with the mounting groove.
5. The bottleneck sealing structure of claim 4, wherein the metal support comprises a first support and a second support which are symmetrically arranged, the first support and the second support are both semi-circular ring structures, and the first support and the second support are fixedly embedded on the bottleneck to form a complete circular ring.
6. The finish seal structure of claim 1, wherein the metal finish has a first sealing surface disposed thereon, the first sealing surface forming an obtuse angle with a bottom surface of the metal finish.
7. A high-pressure composite container comprising the finish seal structure of any one of claims 1 to 6, the high-pressure composite container further comprising:
a bottle opening is formed in the plastic shell, one end of the metal connector extends into the bottle opening, the step is tightly pressed on the bottle opening, and the metal end is connected with the side wall of the bottle opening in a sealing mode;
the bottleneck valve is connected with the metal joint;
the fiber winding reinforcing layer is fixedly wrapped on the surfaces of the plastic shell and the metal end.
8. The high-pressure composite container according to claim 7, wherein the bottle mouth includes a support section and a flange, the support section extends in the axial direction of the plastic shell, one end of the support section is connected with the plastic shell, the other end of the support section is connected with the flange, an installation space is formed between the flange and the plastic shell, and the metal support in the bottle mouth sealing structure is fixedly embedded in the installation space.
9. The high-pressure composite vessel according to claim 8, further comprising a sealing ring, wherein a sealing groove is formed in an inner wall of the support section, and the sealing ring is fixedly embedded in the sealing groove.
10. The high-pressure composite vessel according to claim 8, wherein a second sealing surface is provided on the plastic shell, the second sealing surface being inclined toward the center of the plastic shell, and the second sealing surface being in sealing engagement with the first sealing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011444545.3A CN112393111A (en) | 2020-12-08 | 2020-12-08 | Bottleneck seal structure and high-pressure composite container |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011444545.3A CN112393111A (en) | 2020-12-08 | 2020-12-08 | Bottleneck seal structure and high-pressure composite container |
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| CN112393111A true CN112393111A (en) | 2021-02-23 |
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| CN202011444545.3A Pending CN112393111A (en) | 2020-12-08 | 2020-12-08 | Bottleneck seal structure and high-pressure composite container |
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| CN113188039A (en) * | 2021-06-02 | 2021-07-30 | 合肥工业大学 | Plastic inner container composite gas cylinder joint |
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Application publication date: 20210223 |