CN215721535U - Inert gas filling joint for metal hose and metal hose assembly - Google Patents

Abstract

The utility model provides an inert gas filling joint for a metal hose and a metal hose assembly. The charging joint comprises a valve cock ball head with an internal passage, a valve core arranged at the air inlet end of the internal passage, and an outer sleeve nut arranged outside the valve cock ball head. The inflating valve ball head is provided with a shoulder matched with the outer sleeve nut, one end of the outer sleeve nut is matched with the shoulder, and the other end of the outer sleeve nut is screwed on the outer side of the metal hose through the inner thread of the outer sleeve nut. This fill dress connects can realize carrying out inert gas to metal collapsible tube and fill dress when sealing up the protection to metal collapsible tube, has effectively avoided keeping the trigger condition that the inside rust that causes of in-process external humid air entering metal collapsible tube is filled to metal collapsible tube. According to the metal hose assembly, the sealing plugs and the filling joints are arranged at the two ends of the metal hose, so that the inside of the metal hose is kept in a pressurized and sealed state, and an inert gas protection environment is formed.

Description

Inert gas filling joint for metal hose and metal hose assembly

Technical Field

The utility model relates to the technical field of metal tube filling, in particular to an inert gas filling structure for a metal hose and a metal hose assembly.

Background

The metal hose is generally made of austenitic stainless steel, and the metal hose can be subjected to the condition that wet air or corrosive gas enters the hose due to the fact that the metal hose is not tightly sealed in the daily storage process, so that the metal hose is corroded locally. Under the scene with strict process requirements, the metal hose with internal corrosion cannot be used, or the service life is shortened, the loss of the metal hose is increased, and meanwhile, the loss of the metal hose product can cause the problem of repeated matching. At present, the sealing and packaging processes of metal hoses are mainly film winding, plastic plug plugging, metal plug plugging, vacuum pumping and plastic packaging and the like. In the fields of aviation, aerospace, medical treatment, chemical industry and the like, strict control requirements are placed on excess inside a pipeline, and inert gas can be used as protective gas inside a metal hose by utilizing the inert property of the inert gas, so that a filling joint which can fill the metal hose with the inert gas and can realize sealing is needed at present.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems in the related art, the present invention provides an inert gas filling joint for a metal hose and a metal hose assembly. This metal collapsible tube inert gas fills dress joint can realize carrying out inert gas to metal collapsible tube and filling in when sealing the protection to metal collapsible tube, has effectively avoided keeping the trigger condition that the in-process external humid air got into the inside corrosion that causes of metal collapsible tube at metal collapsible tube to improve metal collapsible tube's guarantee environment, reduced and kept the loss, avoided the repeated supporting work that arouses because of the loss to the user, eliminated the project because of the delay risk that repeated supporting arouses.

The utility model provides an inert gas filling joint for a metal hose. The inert gas filling joint comprises a valve cock ball head with an internal passage, a valve core arranged at the air inlet end of the internal passage, and an outer sleeve nut arranged outside the valve cock ball head. The inflating valve ball head is provided with a shoulder matched with the outer sleeve nut, one end of the outer sleeve nut is matched with the shoulder to limit the position relation between the outer sleeve nut and the inflating valve ball head, and the other end of the outer sleeve nut is screwed on the outer side of the metal hose through internal threads of the outer sleeve nut. When the metal hose is inflated, the valve end of the valve ball head is communicated with an inflation pipeline, the ball end of the valve ball head is communicated with a pipe connecting nozzle of the metal hose, the valve core is opened under the action of gas pressure, and inert gas is filled into the metal hose after sequentially passing through the valve core and the gas outlet end of the internal channel.

In one embodiment, the cross-section of the outer nut is hexagonal to facilitate manipulation with a wrench. The interior of the outer sleeve nut is also provided with an internal thread connecting structure for connecting with the external thread of the filler neck of the metal hose.

In one embodiment, the ball end is spaced from an end of the outer nut having a threaded connection, the outer nut being threadably engaged by its internal threads with external threads of the filler neck, the filler neck being at least partially defined within the spacing between the ball end and the outer nut.

In one embodiment, to simplify the parts manufacturing and assembly process, the valve end, the shoulder and the ball end of the valve ball are integrally formed, and the shoulder is located between the valve end and the ball end.

In one embodiment, the ball end of the valve joint is provided with a conical structure, the filler neck and the conical structure are matched and sealed with each other, so that a wrapping connection is formed, and the connection sealing performance of the filler neck and the ball end is greatly improved.

In one embodiment, a seal may be provided between the valve core and the inlet end of the internal passage in order to further improve the sealing at the location where the valve core contacts the internal passage.

In one embodiment, an annular gasket may be provided at the shoulder portion in order to improve the sealing of the housing nut with the shoulder portion. The outer sleeve nut and the shoulder are tightly attached, and two planes, namely a plane and an arc-shaped plane, are in contact with each other. The annular sealing gasket can be pasted on the arc-shaped surface of the shoulder part and can also be arranged on the plane of the shoulder part.

In the above embodiment, a protrusion is circumferentially disposed between the ball end and the shoulder of the valve ball head, so as to effectively prevent the outer nut from being pulled off and away from the valve ball head, and the annular sealing gasket is restricted from falling off by the protrusion.

In one embodiment, the material of the annular sealing gasket is plastic or rubber.

In one embodiment, to avoid introducing excess material (e.g., material from corrosion occurring inside the valve ball and inside the outer nut) during the filling of the inert gas, an anti-corrosive coating may be provided on the inner surface of the valve ball and the inner surface of the outer nut.

Another aspect of the present invention also provides a metal hose assembly. The metal hose assembly comprises a metal hose, a sealing plug and an inert gas filling joint in any one of the embodiments. The sealing plug and the inert gas filling joint are respectively arranged at two ends of the metal hose and are hermetically connected with the metal hose.

The utility model provides an inert gas filling joint for a metal hose and a metal hose assembly, which fundamentally avoid the triggering condition that external wet air enters the metal hose to cause corrosion in the process of protecting the metal hose, thereby improving the environment protection of the metal hose, reducing the loss in the process of storing the metal hose and avoiding the repeated matching work caused by the loss.

This inert gas fills dress joint can seal the protection to metal collapsible tube promptly, can also realize filling the dress to metal collapsible tube inert gas, sealed effectual, and fill dress process easy operation convenient, improved metal collapsible tube's guarantee environment, reduced the loss of keeping.

The metal hose assembly provided by the utility model adopts an inert gas positive pressure protection process, and the sealing plugs and the inert gas filling joints are arranged at the two ends of the metal hose (simultaneously playing roles of filling and sealing), so that the inside of the metal hose is kept in a pressurized and sealed state, the inert gas filling can be conveniently and reliably realized, an inert gas protection environment is formed, and the problem that external wet air and corrosive gas enter the inside of the hose to generate corrosion is solved.

Those skilled in the art will recognize additional features and advantages upon reading the detailed description, and upon viewing the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a filling joint according to an embodiment of the utility model.

Fig. 2 is an enlarged structural schematic diagram of a valve end of a valve ball head according to an embodiment of the present invention.

Fig. 3 is a schematic view of the overall structure of a metal component according to an embodiment of the present invention.

Detailed Description

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings. Spatially relative terms such as "below," "… below," "lower," "above," "… above," "upper," and the like are used for convenience in describing the positioning of one element relative to a second element and are intended to encompass different orientations of the device in addition to different orientations than those illustrated in the figures. Further, for example, the phrase "one element is over/under another element" may mean that the two elements are in direct contact, or that there is another element between the two elements. Furthermore, terms such as "first", "second", and the like, are also used to describe various elements, regions, sections, etc. and should not be taken as limiting. Like terms refer to like elements throughout the description.

One aspect of the present invention provides an inert gas filling joint for a metal hose.

See also fig. 1 and 2

The inert gas filling joint comprises a valve ball head 1 with an inner channel 11, a valve core 2 arranged at the air inlet end of the inner channel 11, and an outer sleeve nut 3 sleeved outside the valve ball head 1. Wherein the valve ball 1 has a shoulder adapted to the outer sleeve nut 3. One end of the outer nut 3 is fitted to the shoulder to define the positional relationship of the outer nut 3 and the valve ball 1, and the other end of the outer nut 3 is adapted to be screwed outside the metal hose 4 through its internal thread. The metal hose 4 can be screwed to the outer nut 3 by means of a filler neck provided with an external thread.

When the filling joint is used for filling the metal hose 4, the valve end of the valve bulb 1 is communicated with a filling pipeline for filling inert gas into the metal hose, and the bulb end of the valve bulb 1 is communicated with the nozzle of the metal hose 4. The valve core 2 can be automatically opened under the action of gas pressure, so that inert gas sequentially passes through the valve core 2 and the gas outlet end of the internal channel 11 and then is filled into the metal hose 4. When the pressure in the metal hose is filled to a required value, the inflation is stopped, the valve core 2 automatically resets, the connection relation between the valve end and the inflation pipeline is removed, and the valve core 2 is automatically closed under the condition that the gas pressure is eliminated, so that the sealing of the connecting nozzle end of the metal hose 4 is realized.

The valve core 2 used in the inert gas filling joint of the embodiment of the utility model can adopt a structure of GB1795-1996 tyre valve core, and the structure is utilized to realize the filling of inert gas and the sealing of the gas in the metal hose.

The inert gas filling joint provided by the embodiment of the utility model can be used for filling inert gas into the metal hose and sealing and protecting the metal hose, so that the interior of the metal hose is ensured to be continuously in an inert gas protection state, the invasion of external wet air and corrosive gas is fundamentally avoided, the corrosion of the inner surface of the metal hose is avoided, and the major accident potential in special industries, particularly special use working conditions such as aerospace and aviation, is eliminated.

In order to ensure that the metal hose can be stored for a long time, inert gas can be filled into the metal hose through the filling joint provided by the embodiment of the utility model, so that the pressure inside the metal hose is higher than that of the external environment, and the positive pressure environment can be ensured to be maintained inside the metal hose. For the metal hose which needs to be stored for a long time, inert gas can be periodically supplemented and pressurized by the filling joint provided by the embodiment of the utility model, so that the metal hose is continuously in a positive pressure environment.

In one embodiment, the outer nut 3 has a hexagonal cross-section to facilitate assembly and disassembly of the outer nut to the filler neck of the metal hose by a wrench operation. The interior of the outer sleeve nut is also provided with a threaded connection structure (internal thread) for being connected with the external thread of the metal hose filler neck.

In one embodiment, the ball end of the valve ball 1 is spaced from the end of the outer nut 3 that is internally threaded in order to improve the seal between the filler neck and the end of the metal hose connection. After the outer sleeve nut 3 is in threaded connection with the external thread of the filler neck of the metal hose 4 through the internal thread, the filler neck is at least partially limited in an interval formed by the ball end of the inflating valve ball head 1 and the outer sleeve nut 4. According to the inert gas filling joint provided by the embodiment of the utility model, under the condition that the outer sleeve nut is arranged on the shoulder part of the ball head of the inflating valve in a matching manner, a gap is formed between one end of the outer sleeve nut, provided with the internal thread, and the ball head end of the ball head of the inflating valve, and the gap and the connecting pipe mouth end of the metal hose are arranged in an adaptive manner, so that the connecting area of the metal hose and the filling joint is increased, the sealing performance of the interior of the metal hose is improved, and the interior of the metal hose is ensured to continuously maintain a positive pressure environment.

In the above-described embodiment, the ball end of the valve joint may be provided with a tapered structure, and therefore, it is possible to realize that the ball end of the valve joint forms a space with the female-threaded end provided in the cap nut, and the space thus provided shows a tendency that the space becomes gradually smaller from the outer (open end) to the inner (position near the shoulder). Make the bulb end form the parcel formula after with the filler neck butt joint and be connected (metal collapsible tube's filler neck parcel bulb end), recycle overcoat nut and filler neck outer wall spiro union, make partial filler neck by bulb end and overcoat nut press from both sides tightly to set up in this interval, and then make the leakproofness of being connected of filler neck and bulb end promote by a wide margin.

In one embodiment, the valve end, shoulder and ball end of the valve ball may be integrally formed to simplify the component manufacturing and assembly processes, as well as to increase the sealing and integrity of the filler neck itself. The shoulder is arranged between the valve end and the ball end, and the valve end still has the margin to realize the connection with the filling pipeline after the outer sleeve nut is sleeved on the valve ball and matched with the shoulder.

In one embodiment, to further improve the sealing of the contact position of the valve core and the internal passage, it is ensured that after the gas filling is completed and the valve core is automatically closed, no air leakage opening exists between the valve core and the inner wall of the internal passage. For example, a seal, which may be an axial annular seal or an annular seal, may be provided between the valve core and the inner wall of the inlet end of the internal passage. According to the inert gas filling joint provided by the embodiment of the utility model, the sealing gasket is arranged between the valve core and the air inlet end of the internal channel, the valve core is arranged in the internal channel and then tightly presses the sealing gasket, and the effective sealing between the valve core and the internal channel is realized by utilizing the elastic deformation of the sealing gasket.

In one embodiment, in order to improve the tightness between the various abutment members of the filling joint, an annular gasket may be provided at the point where the shoulder abuts the outer nut, which compresses the annular gasket against the shoulder to achieve a reliable seal therebetween. Wherein, under the state that the outer sleeve nut is attached to the shoulder of the ball head of the inflating valve, two planes are contacted with each other, namely a plane and an arc surface. The annular sealing gasket can be pasted on the arc-shaped surface position of the shoulder part or movably arranged on the plane position of the shoulder part. Further, if the annular seal is movably disposed at a planar position of the shoulder portion, a protrusion may be provided at an outer wall periphery between the ball end of the valve ball and the shoulder portion to restrict a moving position of the annular seal. For example, when the outer sleeve nut is pulled away from the valve ball head, the protrusion can be used for limiting the annular sealing gasket from falling off, so that the second assembly is facilitated.

In one embodiment, the material of the sealing gasket to which the filling joint is applied is plastic or rubber in order to avoid chemical reactions between the metal hose and the filling joint, since the filling joint is in contact with the metal hose for a long time.

In one embodiment, to avoid introducing unwanted material (e.g., material from corrosion occurring inside the valve ball and inside the outer nut) during the filling of the inert gas, an anti-corrosive coating may be applied to the inner surface of the valve ball and the inner surface of the outer nut. Due to long-time storage, the inside of the ball head of the inflating valve and the inside of the outer sleeve nut are possibly corroded to generate impurities, and the impurities are easily filled into the metal hose in the process of supplementing gas midway. Therefore, in order to avoid the phenomenon, an anticorrosive layer can be correspondingly arranged on the inner surface of the ball head of the valve and the inner surface of the outer sleeve nut.

In one embodiment, to reduce the storage cost of the metal hose, the inert gas filled in the metal hose may be argon. To further reduce the storage cost of the metal hose, an inert gas, such as nitrogen, may be filled into the metal hose.

See FIG. 3

Another aspect of the present invention also provides a metal hose assembly. The metal hose assembly comprises a metal hose 4, a sealing plug 5 and an inert gas filling joint 6 as described in any of the embodiments above. The sealing plugs 5 and the inert gas filling joints 6 are respectively arranged at two ends of the metal hose 4 and are respectively connected with the metal hose 4 in a sealing manner. In particular, the end of the inert gas filling connection 6 remote from the metal hose 4 is intended to be connected to an inert gas filling line, so that inert gas is filled into the metal hose 4 through the inert gas filling connection 6. When the inert gas is filled, the inert gas filling joint 6 is opened under the action of pressure difference, so that the inert gas can be filled into the metal hose 4, the filling is suspended after a certain time, and the sealing plug 5 is arranged at the other end of the metal hose 4 and is continuously filled to the required pressure. And after the filling is finished, the connection between the inert gas filling joint and the inert gas source is cut off, the inert gas filling joint is automatically closed, and the filling work is finished. At this time, the metal hose assembly is brought into a completely sealed state, and the inside of the metal hose forms a completely closed space and is filled with inert gas.

The specific implementation process comprises the following steps: one end of a metal hose which needs to be protected by inert gas is connected with the gas outlet end of the inert gas filling joint, and then the gas inlet end of the inert gas filling joint is communicated with a gas source for filling the inert gas;

the inert gas filling joint is automatically opened under the action of pressure difference to realize normal ventilation, and the inert gas is blown into the metal hose through the inert gas filling joint for 30 to 60 seconds, so that other gases in the metal hose are blown off;

stopping purging with the inert gas, and immediately plugging the first end of the metal hose by using the sealing plug to seal the first end;

filling inert gas into the metal hose to the required pressure through the inert gas filling joint (ensuring that the pressure inside the metal hose is higher than the pressure of the external environment);

disconnecting the inert gas source from the inert gas filling joint, and automatically closing the inert gas filling joint to seal the second end;

performing tightness detection, and respectively detecting the air tightness of the position where the first end of the metal hose is connected with the sealing plug and the position where the second end of the metal hose is connected with the inert gas filling joint;

and storing the metal hose qualified in the tightness detection, and periodically supplementing pressure to the metal hose through the inert gas filling joint so as to better obtain inert gas protection for the metal hose.

According to the metal hose assembly provided by the embodiment of the utility model, the inert gas filling and the second end sealing of the metal hose are realized by using the inert gas filling connector, the first end of the metal hose is sealed by using the sealing plug, the inert gas is ensured to be filled in the metal hose for a long time, the invasion of external humid air and corrosive gas is fundamentally avoided, the corrosion of the inner surface of the metal hose is avoided, and the major accident potential under special use working conditions of special industries, particularly aerospace and the like is eliminated.

The above-described embodiments of the present invention may be combined with each other with corresponding technical effects.

The utility model provides an inert gas filling joint for a metal hose and a metal hose assembly, wherein the inert gas filling of the metal hose and the sealing after the filling are simultaneously realized through the filling joint, so that the triggering condition that external wet air enters the metal hose to cause corrosion in the process of maintaining the metal hose is fundamentally avoided, the environment guaranteed by the metal hose is improved, the loss in the process of maintaining the metal hose is reduced, and the repeated matching work caused by the loss is avoided. This inert gas fills dress joint can seal the protection to metal collapsible tube promptly, can also realize filling the dress to metal collapsible tube inert gas, sealed effectual, and fill dress process easy operation convenient, improved metal collapsible tube's guarantee environment, reduced the loss of keeping. The metal hose assembly provided by the utility model adopts an inert gas positive pressure protection process, and the sealing plugs and the inert gas filling joints are arranged at the two ends of the metal hose (simultaneously playing roles of filling and sealing), so that the inside of the metal hose is kept in a pressurized and sealed state, the inert gas filling and sealing can be conveniently and reliably realized, an inert gas protection environment is formed, and the problem that external wet air and corrosive gas enter the hose to generate corrosion is solved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. An inert gas filling joint for a metal hose, comprising: the valve comprises a valve ball head with an internal channel, a valve core arranged at the air inlet end of the internal channel and an outer sleeve nut arranged outside the valve ball head; the inflating valve ball head is provided with a shoulder part matched with the outer sleeve nut, one end of the outer sleeve nut is matched with the shoulder part, and the other end of the outer sleeve nut is screwed on the outer side of the metal hose through the inner thread of the outer sleeve nut;

when the inflating valve is inflated, the inflating valve end of the inflating valve ball head is communicated with an inflating pipeline, the ball head end of the inflating valve ball head is communicated with a pipe connecting nozzle of the metal hose, the valve core is opened under the action of gas pressure, and inert gas is filled into the metal hose after sequentially passing through the valve core and the air outlet end of the internal channel.

2. Inert gas filling joint for metal hoses according to claim 1, characterized in that the cross section of the outer sleeve nut is hexagonal.

3. The inert gas filling joint for a metal hose according to claim 2, wherein said ball end is spaced from an end of said outer nut that is internally threaded, said outer nut being threadably engaged by its internal threads with the external threads of said filler neck, said filler neck being at least partially defined within the spacing between said ball end and said outer nut.

4. An inert gas charging joint for a metal hose according to any one of claims 1 to 3, characterized in that the valve end, the shoulder and the bulb end of the valve bulb are integrally formed, and the shoulder is located between the valve end and the bulb end.

5. An inert gas filling joint for a metal hose according to claim 3, characterized in that the ball end of the valve joint has a conical structure, the nipple and the conical structure being in a mating sealing arrangement with each other.

6. The inert gas filling joint for a metal hose according to claim 1, wherein a gasket is provided between the valve core and the inner wall of the inlet end of the internal passage.

7. Inert gas filling joint for metal hoses according to claim 1, characterized in that an annular gasket is provided between said shoulder and the portion of said outer sleeve nut that engages said shoulder.

8. Inert gas filling joint for metal hoses according to claim 7, characterized in that the material of the annular sealing gasket is plastic or rubber.

9. The inert gas charging joint for a metal hose according to claim 1, wherein said valve stem bulb inner surface and said outer sleeve nut inner surface are provided with an anti-corrosion layer.

10. A metal hose assembly comprising a metal hose, a sealing plug and an inert gas filling joint according to any one of claims 1 to 9; the sealing plug and the inert gas filling joint are respectively arranged at two ends of the metal hose and are hermetically connected with the metal hose.

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