Air bag valve device

Abstract

The air bag valve device comprises a valve body, an air bag pipe, two valve covers and a valve element pipe, the valve body is provided with a cavity penetrating through the two ends of the valve body and a valve body channel penetrating through the two sides of the valve body, and the valve body channel is communicated with the cavity and located on one side of the middle of the cavity; the air bag pipe is arranged in the cavity, a first gap is formed between the outer wall of the air bag pipe and the inner wall of the cavity, a gap is formed between the air bag pipe and the inner wall of the end, away from the middle of the cavity, of the valve body channel, and the two valve covers are arranged at the two ends of the valve body respectively. The two valve cover parts are respectively sleeved in the two ends of the air bag pipe and are respectively connected with the inner walls of the two ends of the air bag pipe in a sealing manner, the valve core pipe is arranged in the air bag pipe, the two ends of the valve core pipe are respectively connected with the two valve covers, at least one of the two valve covers is provided with an air inlet and outlet hole, and the air inlet and outlet hole is communicated with the interior of the valve core pipe. The vacuum degree in the coating chamber can be guaranteed, meanwhile, the strip cannot be crushed, and the coating quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and specifically relates to an airbag valve device. Background Art

[0002] In existing vacuum coating equipment, sealing structures are usually provided between the unwinding chamber and the coating chamber, and between the coating chamber and the winding chamber respectively. Through the sealing structure between the unwinding chamber and the coating chamber, the unwinding chamber and the coating chamber can be isolated from each other, or through the sealing structure between the coating chamber and the winding chamber, the coating chamber and the winding chamber can be isolated from each other. In this way, when changing the roll on the unwinding mechanism in the unwinding chamber or replacing the winding cylinder on the winding mechanism in the winding chamber, the vacuum degree in the coating chamber will not be affected. After changing the roll or replacing the winding cylinder, it is not necessary to evacuate the coating chamber again, which can reduce the coating cycle and improve production efficiency.

[0003] The sealing structure generally adopts a narrow slit for a strip such as a PET film to pass through as described in Chinese Patent CN204644456U or a vacuum lock as described in Chinese Patent CN105349961B. The valve cover driving mechanism of the vacuum lock drives the valve cover to move downward, so that the bottom surface of the valve cover tightly presses on the top surface of the valve seat and the strip, thereby sealing the inlet end of the inclined through hole, and thus the two adjacent chambers can be isolated from each other.

[0004] When using the narrow slit method, the sealing effect is poor, and there is usually air leakage, which cannot ensure the vacuum degree in the coating chamber. When using the vacuum lock method, the sealing effect is good, there is no air leakage, and the vacuum degree in the coating chamber can be ensured. However, since the valve cover and the valve seat are both made of stainless steel, it is easy to damage the strip when the bottom surface of the valve cover tightly presses on the top surface of the valve seat and the strip, thereby affecting the coating quality. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an airbag valve device, which has a good sealing effect, no air leakage phenomenon, can ensure the vacuum degree in the coating chamber, and at the same time will not damage the strip, improving the coating quality.

[0006] The technical solution adopted by the present invention to solve its technical problems is:

[0007] An airbag valve device includes a valve body, an airbag tube, two valve covers, and a valve core tube. The valve body is provided with a cavity penetrating through its two ends and a valve body passage penetrating through its two sides. The valve body passage is communicated with the cavity and is located on one side of the middle of the cavity. The airbag tube is arranged in the cavity, and there is a first gap between the outer wall of the airbag tube and the inner wall of the cavity. There is a void between the airbag tube and the inner wall of the end of the valve body passage far from the middle of the cavity. The two valve covers are respectively arranged at the two ends of the valve body. The two valve cover parts are respectively sleeved inside the two ends of the airbag tube and are respectively sealed and connected with the inner walls of the two ends of the airbag tube. The valve core tube is arranged inside the airbag tube, and the two ends of the valve core tube are respectively connected with the two valve covers. Among the two valve covers, at least one valve cover is provided with an air inlet and outlet hole, and the air inlet and outlet hole is communicated with the inside of the valve core tube. There is a second gap between the outer wall of the valve core tube and the inner wall of the airbag tube or the inner wall of the valve core tube is in contact with the inner wall of the airbag tube. The outer wall of the valve core tube is provided with through holes, and the through holes are respectively communicated with the inside of the valve core tube and the inside of the airbag tube.

[0008] As a preferred technical solution, the wall thickness of the part of the airbag tube facing the valve body passage is smaller than the wall thickness of the other parts of the airbag tube.

[0009] As a preferred technical solution, the inner wall of the airbag tube is provided with an airbag tube groove at the position corresponding to the valve body passage, so that the wall thickness of the part of the airbag tube facing the valve body passage is smaller than the wall thickness of the other parts of the airbag tube.

[0010] As a preferred technical solution, the wall thickness of the part of the airbag tube facing the valve body passage is 500μm - 1mm, and the wall thickness of the other parts of the airbag tube is 1 - 2mm.

[0011] As a preferred technical solution, the widths of the first gap and the second gap are 2 - 5mm.

[0012] As a preferred technical solution, the airbag tube includes an airbag tube body and two tapered portions formed at both ends of the airbag tube body. The inner diameter of the tapered portion gradually increases in a direction away from the airbag tube body. The cavity of the valve body includes a first portion and two second portions respectively communicating with both ends of the first portion. The shape of the first portion is adapted to the shape of the airbag tube body, and the shape of the second portion is adapted to the shape of the tapered portion. The airbag tube body is disposed within the first portion, and the two tapered portions are respectively disposed within the two second portions. The valve cover includes a first mounting portion, a connecting portion, and a second mounting portion connected in sequence. The first mounting portions of the two valve covers are respectively and sealingly disposed at both ends of the valve body. The shape of the connecting portion is adapted to the shape of the tapered portion. The connecting portions of the two valve covers are respectively sleeved within the two tapered portions and are respectively and sealingly connected to the inner walls of the two tapered portions. Both ends of the valve core tube are respectively and sealingly connected to the second mounting portions of the two valve covers. Among the two valve covers, at least one of the first mounting portion, the connecting portion, and the second mounting portion of the valve cover is provided with the air inlet and outlet holes.

[0013] As a preferred technical solution, both ends of the valve core tube are respectively threadedly connected to the second mounting portions of the two valve covers; a sealing ring is provided at one end of the first mounting portion close to the connecting portion. The cavity is located inside the sealing ring. The sealing rings of the two valve covers respectively abut against the end faces of both ends of the valve body.

[0014] As a preferred technical solution, the through hole faces the valve body passage. The through hole is one or more, and multiple through holes are arranged at intervals along the axial direction of the valve core tube.

[0015] As a preferred technical solution, among the two valve covers, at least one end of the valve cover away from the valve body is provided with an air source connector at a position corresponding to the air inlet and outlet holes, and the air source connector is communicated with the air inlet and outlet holes.

[0016] As a preferred technical solution, the airbag tube is a rubber tube or a silica gel tube.

[0017] The beneficial effects of the present invention are as follows: By providing the valve body, the airbag tube, the two valve covers, and the valve core tube, the strip is pressed against the inner wall of one end of the valve body passage away from the middle of the cavity in a manner of airbag tube expansion, with good sealing effect, no air leakage phenomenon, ensuring the vacuum degree in the coating chamber, and not damaging the strip, ensuring the coating quality. Moreover, the valve core tube is disposed within the airbag tube, and there is a second gap between the outer wall of the valve core tube and the inner wall of the airbag tube or the outer wall of the valve core tube is in contact with the inner wall of the airbag tube, so that the space inside the airbag tube is relatively small. In this way, when filling compressed air into the airbag tube or discharging the compressed air inside the airbag tube, the airbag tube can expand or contract quickly, and the amount of inflated air is reduced, improving the production efficiency. Description of the Drawings

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 FIG. 1 is a schematic structural diagram of an airbag valve device provided by an embodiment of the present invention;

[0020] Figure 2 FIG. 2 Figure 1 is a side view schematic diagram of the airbag valve device shown in FIG. 1;

[0021] Figure 3 FIG. 3 Figure 1 is a cross-sectional view schematic diagram of the airbag valve device shown in FIG. 1 at a first angle;

[0022] Figure 4 FIG. 4 Figure 3 is a partial enlarged view schematic diagram of the position A shown in FIG. 1;

[0023] Figure 5 FIG. 5 Figure 1 is a cross-sectional view schematic diagram of the airbag valve device shown in FIG. 1 at a second angle;

[0024] Figure 6 FIG. 6 Figure 1 is an exploded view schematic diagram of the airbag valve device shown in FIG. 1;

[0025] Figure 7 FIG. 7 Figure 1 is a schematic structural diagram of an airbag tube of the airbag valve device shown in FIG. 1;

[0026] Figure 8 FIG. 8 Figure 1 is a schematic structural diagram of a valve core tube of the airbag valve device shown in FIG. 1.

[0027] Reference numerals:

[0028] 10, valve body; 11, cavity; 12, valve body passage; 20, airbag tube; 21, airbag tube groove; 22, airbag tube body; 23, tapered portion; 30, valve cover; 31, first mounting portion; 32, connecting portion; 33, second mounting portion; 34, air inlet and outlet hole; 40, valve core tube; 41, through hole; 50, gas source connector. Detailed embodiments

[0029] The concept, specific structure, and technical effects of the present invention will be clearly and completely described below in conjunction with embodiments and the accompanying drawings to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts all fall within the scope of protection of the present invention. In addition, all connection / linkage relationships involved in the patent do not simply refer to direct connection of components, but refer to the formation of a more optimal connection structure by adding or reducing connection accessories according to specific implementation situations. Each technical feature in the present invention can be interactively combined without mutual contradiction or conflict.

[0030] Please refer to Figures 1 to 8 , an airbag valve device provided by an embodiment of the present invention includes a valve body 10, an airbag tube 20, two valve covers 30, and a valve core tube 40.

[0031] The valve body 10 is a metal valve body, such as a stainless-steel valve body. The valve body 10 is provided with a cavity 11 penetrating through its two ends and a valve body passage 12 penetrating through its two sides. The valve body passage 12 is communicated with the cavity 11 and is located on one side of the middle part of the cavity 11 (or the axis of the cavity 11), for example, below the middle part of the cavity 11 (or the axis of the cavity 11).

[0032] The airbag tube 20 is coaxially arranged in the cavity 11, and there is a first gap (not shown in the figure) between the outer wall of the airbag tube 20 and the inner wall of the cavity 11. There is a gap for the strip to pass through between the airbag tube 20 and the inner wall of the end of the valve body passage 12 far from the middle part of the cavity 11. The strip is, for example, a PET film or the like. The two valve covers 30 are respectively hermetically arranged at the two ends of the valve body 10, and the two valve cover parts are respectively sleeved inside the two ends of the airbag tube 20 and are hermetically connected to the inner walls of the two ends of the airbag tube 20, so as to prevent the compressed air filled into the airbag tube 20 from leaking out between the valve cover 30 and the valve body 10.

[0033] The valve core tube 40 is coaxially arranged inside the airbag tube 20, and both ends of the valve core tube 40 are hermetically connected to two valve covers 30 respectively. There is a second gap between the outer wall of the valve core tube 40 and the inner wall of the airbag tube 20. The outer wall of the valve core tube 40 is provided with through holes 41, and the through holes 41 communicate with the inside of the airbag tube 20 and the inside of the valve core tube 40. The two valve covers 30 are respectively provided with air inlet and outlet holes 34 penetrating along their axial directions, and the air inlet and outlet holes 34 communicate with the inside of the valve core tube 40. In this embodiment, at the position corresponding to the air inlet and outlet holes 34 at one end of the valve cover 30 away from the valve body 10, an air source connector 50 is provided, and the air source connector 50 communicates with the air inlet and outlet holes 34. The air source connector 50 is used to connect with the air charging and discharging device. By hermetically connecting both ends of the valve core tube 40 to the two valve covers 30 respectively, it can be ensured that the compressed air filled into the air inlet and outlet holes 34 directly enters the valve core tube 40, rather than directly entering the airbag tube 20.

[0034] There are multiple through holes 41, for example, five. The multiple through holes 41 are spaced apart along the axial direction of the valve core tube 40. It can be understood that the number of through holes 41 can also be, for example, one, two, three, four, six, etc., and can be set according to the actual situation.

[0035] In other embodiments, the outer wall of the valve core tube 40 fits with the inner wall of the airbag tube 20.

[0036] In other embodiments, among the two valve covers 30, only one valve cover 30 is provided with the air inlet and outlet holes 34 and the air source connector 50.

[0037] With the above structure, during actual application, the strip passes through the gap between the inner wall of the airbag tube 20 and the end of the valve body passage 12 far from the middle of the cavity 11. Taking the airbag valve device between the unwinding chamber and the coating chamber as an example, when the strip is almost completely unwound and a roll change is required on the unwinding mechanism in the unwinding chamber, first, compressed air is filled into the air inlet and outlet holes 34 of the two valve covers 30 through the air source connectors 50 of the two valve covers 30 by the air charging and discharging device. Then, the compressed air enters the valve core tube 40 and then enters the airbag tube 20 through the through hole 41. In this way, compressed air is filled into the airbag tube 20. Under the extrusion of the compressed air, the airbag tube 20 expands. The other parts of the airbag tube 20 will squeeze the inner wall of the cavity 11, and the part of the airbag tube 20 facing the valve body passage 12 will expand towards the inner wall of the end of the valve body passage 12 far from the middle of the cavity 11, so that the strip can be pressed against the inner wall of the end of the valve body passage 12 far from the middle of the cavity 11, thus achieving sealing. The unwinding chamber and the coating chamber are isolated from each other and not connected. Then, the roll change operation can be carried out on the unwinding mechanism in the unwinding chamber. After completion, the air inside the airbag tube 20 is discharged through the air source connector 50 of the two valve covers 30, the air inlet and outlet holes 34 of the two valve covers 30, the valve core tube 40, and the through hole 41 by the air charging and discharging device. In this way, the compressed air in the airbag tube 20 is discharged. After the compressed air in the airbag tube 20 is completely discharged, the airbag tube 20 shrinks and returns to its original state because it is not squeezed by the compressed air. The part of the airbag tube 20 facing the valve body passage 12 will release the strip. At this time, the unwinding chamber and the coating chamber are connected through the valve body passage 12, and the strip can be unwound through the unwinding mechanism in the unwinding chamber. When the strip is almost completely wound and a winding reel needs to be replaced in the winding chamber, the air charging and discharging operation of the airbag valve device between the coating chamber and the winding chamber can be carried out according to the above steps.

[0038] In the present invention, through the provided valve body 10, airbag tube 20, two valve covers 30 and valve core tube 40, the strip is pressed against the inner wall of one end of the valve body passage 12 far from the middle of the cavity 11 by the expansion of the airbag tube 20. The sealing effect is good, there will be no air leakage phenomenon, the vacuum degree in the coating chamber is ensured, and the strip will not be damaged, ensuring the coating quality. Moreover, the valve core tube 40 is arranged inside the airbag tube 20 and there is a second gap between the outer wall of the valve core tube 40 and the inner wall of the airbag tube 20 or the outer wall of the valve core tube 40 is in contact with the inner wall of the airbag tube 20, so that the space inside the airbag tube 20 is relatively small. In this way, when compressed air is filled into the airbag tube 20 or the compressed air inside the airbag tube 20 is discharged, the airbag tube 20 can expand or contract quickly, and the amount of inflated air is reduced, improving the production efficiency. At the same time, through the air inlet and outlet holes 34 of the two valve covers 30 and the multiple through holes 41 are distributed at intervals along the axial direction of the valve core tube 40, two-way inflation can be realized, and the airbag tube 20 can be evenly stressed, and the situation that the deformation center shifts to one end of the airbag tube 20 will not occur, so that the airbag tube 20 can completely press the strip against the inner wall of one end of the valve body passage 12 far from the middle of the cavity 11, there will be no air leakage phenomenon, the sealing performance is good, and the inflation speed and exhaust speed are improved, thereby further improving the expansion or contraction speed of the airbag tube 20, and further improving the production efficiency.

[0039] In this embodiment, the wall thickness of the part of the airbag tube 20 facing the valve body passage 12 is smaller than the wall thickness of the other parts of the airbag tube 20. When compressed air is filled into the airbag tube 20 or the compressed air inside the airbag tube 20 is discharged, the speed of the part of the airbag tube 20 facing the valve body passage 12 expanding or contracting towards the inner wall of one end of the valve body passage 12 far from the middle of the cavity 11 can be increased, further improving the production efficiency.

[0040] In this embodiment, an airbag tube groove 21 is provided on the inner wall of the airbag tube 20 at the position corresponding to the valve body passage 12, so that the wall thickness of the part of the airbag tube 20 facing the valve body passage 12 is smaller than the wall thickness of the other parts of the airbag tube 20.

[0041] The wall thickness of the part of the airbag tube 20 facing the valve body passage 12 is 500 μm (micrometers) - 1 mm (millimeters), preferably 1 mm, and the wall thickness of the other parts of the airbag tube 20 is 1 - 2 mm, preferably 2 mm. This value can increase the speed of the part of the airbag tube 20 facing the valve body passage 12 expanding or contracting towards the inner wall of one end of the valve body passage 12 far from the middle of the cavity 11.

[0042] The airbag tube 20 is a rubber tube, which can achieve soft sealing with good sealing effect. Even when the surface of the strip is uneven or contains media such as sand, debris, corrosive substances, etc., the airbag tube 20 can still firmly press the strip against the inner wall of one end of the valve body passage 12 far from the middle of the cavity 11 for sealing.

[0043] Understandably, the airbag tube 20 can also be a silica gel tube, which can achieve the same technical effect as the rubber tube.

[0044] The widths of the first gap and the second gap are 2 - 5 mm, preferably 3 mm. This value enables the airbag tube 20 to expand or contract quickly and can reduce the amount of inflated air.

[0045] In this embodiment, the airbag tube 20 includes a circular airbag tube body 22 and two tapered portions 23 formed at both ends of the airbag tube body 22. The inner diameter of the tapered portion 23 gradually increases in a direction away from the airbag tube body 22. The cavity 11 of the valve body 10 includes a first portion and two second portions respectively communicating with both ends of the first portion. The shape of the first portion is adapted to the shape of the airbag tube body 22, and the shape of the second portion is adapted to the shape of the tapered portion 23. The airbag tube body 22 is coaxially disposed within the first portion, and the two tapered portions 23 are respectively coaxially disposed within the two second portions. The inner wall of the airbag tube body 22 is provided with the airbag tube groove 21. The valve cover 30 includes a first mounting portion 31, a connecting portion 32, and a second mounting portion 33 connected in sequence. The first mounting portions 31 of the two valve covers 30 are respectively sealed and disposed at both ends of the valve body 10, and the shape of the connecting portion 32 is adapted to the shape of the tapered portion 23. The connecting portions 32 of the two valve covers 30 are respectively sleeved within the two tapered portions 23 and are respectively sealingly connected to the two tapered portions 23. The sealing connection method is, for example, that the outer wall of the connecting portion 32 is in interference fit with the inner wall of the corresponding tapered portion 23. Both ends of the valve core tube 40 are sealingly connected to the second mounting portions 33 of the two valve covers 30. The outer diameter of the second mounting portion 33 is smaller than the minimum outer diameter of the connecting portion 32. When the air inlet / outlet holes 34 are respectively provided on the two valve covers 30, the air inlet / outlet holes 34 are respectively provided on the first mounting portion 31, the connecting portion 32, and the second mounting portion 33 of the two valve covers 30, and an air source joint 50 is provided at a position corresponding to the air inlet / outlet hole 34 at one end of the first mounting portion 31 of the two valve covers 30 away from the connecting portion 32. When only one valve cover 30 is provided with the air inlet / outlet hole 34, the air inlet / outlet hole 34 is provided on the first mounting portion 31, the connecting portion 32, and the second mounting portion 33 of this valve cover 30, and an air source joint 50 is provided at a position corresponding to the air inlet / outlet hole 34 at one end of the first mounting portion 31 of this valve cover 30 away from the connecting portion 32. With the valve body 10, the airbag tube 20, and the valve cover 30 having such a structure, the sealing effect is good, and it is convenient to assemble the airbag tube 20 and the valve body 10 together, assemble the airbag tube 20 and the two valve covers 30 together, and assemble the valve core tube 40 and the airbag tube 20 and the two valve covers 30 together.

[0046] The first mounting portion 31, the connecting portion 32, and the second mounting portion 33 are preferably integrally formed.

[0047] The first mounting portions 31 of the two valve covers 30 are respectively sealed and disposed at both ends of the valve body 10. Specifically, a sealing ring is provided at one end of the first mounting portion 31 close to the second mounting portion 32. The cavity 11 is located inside the sealing ring, and the sealing rings of the two valve covers 30 respectively abut against the end faces at both ends of the valve body 10.

[0048] One end of the first installation part 31 close to the connection part 32 is provided with an annular groove. The cavity 11 is located inside the annular groove. The sealing ring is arranged in the annular groove, and a part of the sealing ring extends out of the annular groove and abuts against the corresponding end face of the valve body 10.

[0049] Both ends of the valve core tube 40 are hermetically connected to the second installation parts 33 of the two valve covers 30 respectively. The hermetic connection adopts a threaded connection. Specifically, the outer wall of the second installation part 33 is provided with an external thread, and the inner walls of both ends of the valve core tube 40 are respectively provided with internal threads. The internal threads on the inner walls of both ends of the valve core tube 40 are respectively threadedly connected to the external threads of the second installation parts 33 of the two valve covers 30.

[0050] Furthermore, the through hole 41 faces the valve body passage 12, which can further improve the speed at which the part of the airbag tube 20 facing the valve body passage 12 expands or contracts towards the inner wall of the end of the valve body passage 12 far from the middle of the cavity 11.

[0051] The above is a specific description of the preferred embodiment of the present invention, but the present invention is not limited to the described embodiment. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present invention. These equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An airbag valve device, characterized in that: The invention comprises a valve body, an airbag tube, two valve covers and a valve core tube, wherein the valve body is provided with a cavity penetrating through both ends thereof and a valve body channel penetrating through both sides thereof, the valve body channel is communicated with the cavity and is located on one side of the middle of the cavity, the airbag tube is arranged in the cavity and a first gap is provided between the outer wall of the airbag tube and the inner wall of the cavity, a gap is provided between the airbag tube and the inner wall of one end of the valve body channel away from the middle of the cavity, the two valve covers are respectively arranged at both ends of the valve body, and the two valve cover parts are respectively sleeved on both ends of the airbag tube The valve core tube is arranged in the air bag tube, and the two ends of the valve core tube are respectively connected to two valve covers. Among the two valve covers, at least one valve cover is provided with air inlet and outlet holes, and the air inlet and outlet holes are connected with the interior of the valve core tube. There is a second gap between the outer wall of the valve core tube and the inner wall of the air bag tube, or the inner wall of the valve core tube is fitted with the inner wall of the air bag tube. The outer wall of the valve core tube is provided with a through hole, and the through hole is respectively connected with the interior of the valve core tube and the interior of the air bag tube.

2. The airbag valve device according to claim 1, characterized in that: The wall thickness of the portion of the airbag tube facing the valve body channel is smaller than the wall thickness of other portions of the airbag tube.

3. The airbag valve device according to claim 2, characterized in that: An airbag tube groove is provided on the inner wall of the airbag tube at a position corresponding to the valve body channel, so that the wall thickness of the part of the airbag tube facing the valve body channel is smaller than the wall thickness of other parts of the airbag tube.

4. The airbag valve device according to claim 2, characterized in that: The wall thickness of the portion of the airbag tube facing the valve body channel is 500 μm-1 mm, and the wall thickness of the other portions of the airbag tube is 1-2 mm.

5. The airbag valve device according to claim 1, characterized in that: The width of the first gap and the second gap is 2-5 mm.

6. The airbag valve device according to claim 1, characterized in that: The airbag tube comprises an airbag tube body and two tapered portions formed at both ends of the airbag tube body, the inner diameter of the tapered portion gradually increases in a direction away from the airbag tube body, the cavity of the valve body comprises a first part and two second parts respectively connected to both ends of the first part, the shape of the first part is adapted to the shape of the airbag tube body, the shape of the second part is adapted to the shape of the tapered portion, the airbag tube body is arranged in the first part, and the two tapered portions are respectively arranged in the two second parts, the valve cover comprises a first mounting portion, a connecting portion and a second mounting portion connected in sequence, the first mounting portions of the two valve covers are respectively sealed and arranged at both ends of the valve body, the shape of the connecting portion is adapted to the shape of the tapered portion, the connecting portions of the two valve covers are respectively sleeved in the two tapered portions and are respectively sealed and connected to the inner walls of the two tapered portions, the two ends of the valve core tube are respectively sealed and connected to the second mounting portions of the two valve covers, and at least one of the two valve covers has the first mounting portion, the connecting portion and the second mounting portion provided with the inlet and outlet holes.

7. The airbag valve device according to claim 6, characterized in that: The two ends of the valve core tube are respectively threadedly connected to the second mounting parts of the two valve covers; A sealing ring is provided at one end of the first mounting portion close to the connecting portion, the cavity is located inside the sealing ring, and the sealing rings of the two valve covers are respectively against the end surfaces at both ends of the valve body.

8. The airbag valve device according to claim 1, characterized in that: The through hole faces the valve body channel, and there are one or more through holes, which are spaced apart along the axial direction of the valve core tube.

9. The airbag valve device according to claim 1, characterized in that: Among the two valve covers, at least one valve cover has an end away from the valve body provided with an air source connector at a position corresponding to the air inlet and outlet holes, and the air source connector is in communication with the air inlet and outlet holes.

10. The airbag valve device according to claim 1, characterized in that: The air bag tube is a rubber tube or a silicone tube.

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